CN114555888A

CN114555888A - Square pile construction method and equipment for rotary drilling rig

Info

Publication number: CN114555888A
Application number: CN202180005321.9A
Authority: CN
Inventors: 郑彪; 郑杰; 李常伟
Original assignee: Chengdu Xinhao Foundation Engineering Co ltd
Current assignee: Chengdu Xinhao Foundation Engineering Co ltd
Priority date: 2021-01-04
Filing date: 2021-08-20
Publication date: 2022-05-27
Anticipated expiration: 2041-08-20
Also published as: CN114555888B; CN116044305A

Abstract

The invention belongs to the technical field of engineering construction, and particularly relates to a square pile construction method and equipment for a rotary drilling rig. The specific technical scheme comprises the following steps: a rotary drilling rig square pile construction method comprises the following steps: leveling the field; measuring and paying off; well mouth concrete protecting wall; positioning a drilling machine; adjusting verticality of a drilling machine; drilling a guide hole; drilling a compound hole; drilling a square hole; round drilling and hole cleaning; and (6) square drilling and hole cleaning. The invention provides a novel square pile construction method of a rotary drilling rig, which can be used for square pile construction in the whole process by using equipment, effectively reduces the underground operation of labor personnel and avoids the project safety production risk from the source. The invention also provides three square pile drill bits and a square pile hole cleaning drill in cooperation with the square pile construction method, and further realizes the whole-process mechanization of square pile construction.

Description

Square pile construction method and equipment for rotary drilling rig

Technical Field

The invention belongs to the technical field of engineering construction, and particularly relates to a square pile construction method and equipment for a rotary drilling rig.

Background

With the continuous development of socioeconomic of China, the investment of national infrastructure construction is more inclined to the middle and western parts, especially to high mountain dangerous areas such as cloud plateau, Panxi plateau and Qinghai-Tibet plateau. A plurality of foundation projects such as high speed (such as high speed along rivers, high speed in the Lexi province and the like) or high-speed rails (such as Sichuan railway and the like) planned or established by the country are located on a plurality of seismic belts, and the mountains are high in road risk, so that geological disasters such as mountain collapse, debris flow and the like are easy to occur, the requirement on supporting at the adjacent edges is high, and more design elements of square supporting anti-slide piles are added in the design of a construction drawing.

The square support pile has larger design aperture, most of the prior piles are formed by adopting a manual hole digging mode, and few piles are formed by adopting mechanical hole forming, so the construction quality and efficiency are generally not ideal due to the limitations of related machines and technologies.

The manual hole digging has at least the following disadvantages: 1. the danger coefficient is high, and the safety protection cost is high; 2. the loss amount of wall protecting materials is large; 3. the construction efficiency is seriously low, and the work efficiency cost is high; 4. the comprehensive cost of manual hole digging construction is too high (including the cost of manual hole digging, the cost of electricity, the cost of wall protecting materials, the cost of wall protecting templates, the cost of safety measures, the work efficiency cost caused by low manual efficiency and the like).

Disclosure of Invention

The invention aims to provide a square pile construction method and equipment of a rotary drilling rig.

In order to achieve the purpose of the invention, the technical scheme adopted by the invention is as follows: a rotary drilling rig square pile construction method comprises the following steps:

s1: leveling the field; s2: measuring and paying off; s3: well head concrete dado; s4: positioning a drilling machine; s5: adjusting verticality of a drilling machine; s6: drilling a guide hole: a guide hole is arranged in the protecting wall, and drilling is carried out based on the guide hole to form a square pile drilling hole; s7: drilling a compound hole: continuously drilling a re-hole on the basis of drilling the lead hole, and forming a preformed hole after the lead hole drilling and the re-hole drilling;

s8: drilling a square hole: drilling a square hole after pre-forming the hole by the guide hole drilling and the compound hole drilling of the drilling machine; s9: round drilling and hole cleaning: after step S8, performing bottom sediment cleaning, and sweeping the bottom of the hole repeatedly from one end to the other end until the bottom sediment is substantially cleaned; s10: square drilling and hole cleaning: and (4) cleaning sediment at the bottom of the hole by using a square hole cleaning drill bit.

Preferably, after step S10, the method further includes the following steps:

s11: measuring sediment; s12: manufacturing and installing a reinforcing steel bar cage; s13: and (5) pouring concrete.

Preferably, the drilling of the pilot hole in step S6 includes the following 2 drilling modes according to different geological structures:

(1) four-corner hole leading method: for a pile foundation with a stable stratum structure, a quincuncial guide hole is formed at the angle of 4 corners of the pile foundation by adopting a circular cutting pick sand-pumping drill bit, and each guide hole is drilled to reach the designed hole bottom elevation;

(2) single hole guiding method: to the unstable pile foundation of stratum structure, adopt circular pick to drag for the sand drill or drill bit, open the pilot hole in the skew rig distal end direction of this pile foundation to creep into to design hole bottom elevation, the size that circular pick dragged for the sand drill or drill bit is greater than the size that circular pick dredged for the sand drill bit in mode (1).

Preferably, the step S7 of hole recovery drilling includes the following 2 hole forming methods according to different geological structures:

(1) four corner hole guiding method: for a pile foundation with a stable stratum structure, drilling at the center of a square pile by adopting a circular cutting pick sand fishing drill until the pile foundation is drilled to the designed pile bottom elevation to reach a preformed hole;

(2) single hole guiding method: for the pile foundation with unstable stratum structure, a round cutting pick sand salvaging drill is adopted to drill on the square pile by the near end of the rotary drilling rig until the designed pile bottom elevation is reached to pre-drilling, and the size of the round cutting pick sand salvaging drill or the drill bit is smaller than that of the round cutting pick sand salvaging drill in the mode (1).

Preferably, the square hole drilling of step S8 is carried out by adopting a square pile drill bit, the square pile drill bit comprises a box body, the box body is provided with a power driving device, a power transmission mechanism and an executing device, the power driving device comprises a power transmission shaft, a first connecting square head, a lifting pressing plate and a pressure conduction plate, the middle part of the box body is provided with the power transmission shaft, the power transmission shaft is rotatably connected with the box body, the number of the bearings is two, the two bearings are respectively positioned at the upper side and the lower side of the box body, the upper side and the lower side of each bearing are respectively provided with a first bearing plate and a second bearing plate, the first bearing plate, the second bearing plate and the box body are connected through screws, the bearings are arranged between the first bearing plate and the second bearing plate, the upper end of the box body is connected with the lifting pressing plate through screws, the outer wall of the upper side of the power transmission shaft is provided with a blocking shoulder, the pressure transmission device comprises a box body, a lifting pressure plate, a power transmission shaft, a baffle shoulder, a pressure conduction plate, a power input first connection square head and a power transmission shaft, wherein the baffle shoulder is positioned in the lifting pressure plate, the lower side of the baffle shoulder is provided with the pressure conduction plate, the pressure conduction plate is fixedly connected to the upper side of the box body, and the upper side of the power transmission shaft is fixedly connected with the power input first connection square head.

Preferably, the power driving device is connected with a power transmission mechanism, the power transmission mechanism comprises a first driving chain wheel, a second driving chain wheel, a power input chain wheel, a first chain, a reversing transmission case, a transmission shaft, a first chain wheel, a second chain wheel and a second chain, the middle part of the power transmission shaft is connected with a first driving chain wheel and a second driving chain wheel, the first driving chain wheel is positioned at the upper side of the second driving chain wheel, the left side and the right side of the inner cavity of the box body are both connected with a reversing transmission box, the upper end of an input shaft of the reversing transmission box is connected with a power input chain wheel, a first chain is arranged between the power input chain wheel at the left side and a first driving chain wheel, and a first chain is arranged between the power input chain wheel at the right side and a second driving chain wheel, output shafts are arranged on the front side and the rear side of the reversing transmission case, and the output shafts of the reversing transmission case are connected with transmission shafts through couplers.

Preferably, power transmission mechanism is connected with final controlling element, final controlling element includes first executive component and second executive component, first executive component is all installed to the box below left and right sides, be connected through first sprocket, second sprocket and second chain drive between first executive component and the transmission shaft, the second executive component is all installed to the one end that the box was kept away from to the transmission shaft.

Preferably, first executive component includes rotatory axis body and the first executive component that excavates, rotatory axis body rotates with the case to be connected, the first executive component that excavates of rotatory axis body outer wall fixedly connected with, the second sprocket is all installed at both ends around the rotatory axis body, the transmission shaft is connected with first sprocket, first sprocket with from second sprocket position left and right sides correspond, install the second chain between first sprocket and the second sprocket.

Preferably, the second executive component includes crawler-type drive wheel, crawler-type follow driving wheel, track caterpillar track, second excavation executive component, power plate and driven shaft, crawler-type drive wheel is connected with the one end that the box was kept away from to the transmission shaft, the box below left and right sides all rotates and is connected with the driven shaft, both ends all are connected with the crawler-type from the driving wheel around the driven shaft, crawler-type drive wheel and crawler-type follow driving wheel position left and right sides and correspond, crawler-type drive wheel and crawler-type follow are installed the track caterpillar track between the driving wheel, track caterpillar track outer wall fixedly connected with power plate, both sides all are connected with the second excavation executive component around the power plate.

Preferably, the lower side of the box body is connected with a lifting protection shaft, and the lifting protection shaft is positioned at the lower side of the first power transmission shaft.

Preferably, the square hole drilling in step S8 is performed by using a square pile drill bit, the square pile drill bit includes a power head part, a power transmission part and a third execution part, the power head part includes a frame, a second connection square head, a second power transmission shaft and a pivoting support, the pivoting supports are mounted on the upper and lower sides of the middle part of the frame, the frame is rotatably connected with the second power transmission shaft through the pivoting support, the upper end of the second power transmission shaft is fixedly connected with the second connection square head, and the third execution part is uniformly mounted on the outer edge of the frame.

Preferably, the actuating component comprises a transmission shaft, a shaft sleeve and an actuating cutting element, the shaft sleeve is connected to the outer side edge of the machine frame, and the transmission shaft is rotatably connected to the interior of the shaft sleeve through a bearing.

Preferably, the implement cutting elements comprise a first implement cutting element and a second implement cutting element, the first implement cutting element and the second implement cutting element are respectively fixedly connected to the lower ends of two adjacent transmission shafts, and the first implement cutting element and the second implement cutting element are distributed in a staggered manner.

Preferably, a power transmission part is arranged between the third execution part and the power head part, the power transmission part comprises a driving sprocket, a first driven sprocket, a second driven sprocket, a first transmission chain and a second transmission chain, two driving sprockets are installed at the upper end of the second power transmission shaft, the two driving sprockets correspond to each other up and down in position, the upper end of the transmission shaft on the left side is connected with the first driven sprocket, the upper end of the transmission shaft on the right side is connected with the second driven sprocket, the first transmission chain is installed between the driving sprocket and the first driven sprocket on the upper side, and the second transmission chain is installed between the driving sprocket and the second driven sprocket on the lower side.

Preferably, the second power transmission shaft is a stepped shaft, and the stepped portion of the second power transmission shaft is located at the lower side of the frame.

Preferably, the driving sprocket and first driven sprocket, the equal adaptation of second driven sprocket, just first driven sprocket is the same with the second driven sprocket, driving sprocket external diameter length is greater than the external diameter length of first driven sprocket and second driven sprocket.

Preferably, the slewing bearing is an external-tooth-free slewing bearing.

Preferably, step S8 square hole creeps into and adopts the square pile drill bit to go on, the square pile drill bit includes the box, the inside edge of box vertically is provided with the grinding axle sleeve of evenly arranging, evenly arranges the lower extreme of grinding axle sleeve all runs through the lower lateral wall of box and extends to the lower extreme of box, fixedly is provided with the grinding head, the upper end of grinding axle sleeve all runs through the last lateral wall of box and extends to the upper end of box, fixedly is provided with hydraulic motor, hydraulic motor' S lateral wall is fixed to be provided with the oil-out, the upper end of oil-out sets up the oil inlet, the inside of box is fixed to set up the oil tank, the oil tank sets up 2 at least, each fixedly set up motor and hydraulic pump between the oil tank.

Preferably, the motor includes a first motor, a first hydraulic pump is fixedly arranged at an output end of the first motor, a first inlet and a first outlet are fixedly arranged on a side wall of the first hydraulic pump, a second motor is fixedly arranged at a right end of the first motor, a second hydraulic pump is fixedly arranged at an output end of the second motor, and a second inlet and a second outlet are fixedly arranged on a side wall of the second hydraulic pump.

Preferably, the fixed anti-rotation plate that is provided with of last lateral wall of box, the inside of anti-rotation plate vertically is provided with the third and connects the square head, the lower lateral wall of third connection square head with the last lateral wall fixed connection of box, the fixed square head reinforcing plate that is provided with the symmetry of lateral wall of third connection square head, the square head reinforcing plate keep away from the third connect one side of square head with the inner wall fixed connection of anti-rotation plate.

Preferably, a grinding head transmission shaft is longitudinally arranged in the grinding shaft sleeve, the lower end of the grinding head transmission shaft is fixedly connected with the grinding head, the upper end of the grinding head transmission shaft penetrates through the upper side wall of the grinding shaft sleeve and is fixedly connected with the output end of the hydraulic motor, and the upper end of the shaft wall of the grinding head transmission shaft is rotatably connected with the grinding shaft sleeve.

Preferably, the grinding head comprises a cutter body and protruding parts, and the protruding parts are uniformly distributed around the cutter body.

Preferably, an oil outlet of the hydraulic motor is connected with an oil tank, a first inlet of the first hydraulic pump and a second inlet of the second hydraulic pump are both connected with the oil tank, and a first outlet of the first hydraulic pump and a second outlet of the second hydraulic pump are both connected with the hydraulic motor.

Preferably, in step S10, the square hole-cleaning drill bit is a square pile hole-cleaning drill, and includes a power input fourth connection square head and a mounting frame plate, the power input fourth connection square head bottom is connected with a mounting plate, the mounting plate bottom is connected with an outer ring of a slewing bearing with external teeth, the inner ring of the slewing bearing with external teeth is connected in the middle of the top of the mounting frame plate, the left and right sides of the top inside the mounting frame plate are both longitudinally provided with a movable groove, the inner wall of the movable groove is provided with a bearing, the inner wall of the bearing is connected with the outer wall of a connecting column, the top of the connecting column is connected with a transmission gear, the outer ring of the slewing bearing with external teeth is meshed with the transmission gear, the bottoms of the connecting column on the left and right sides are respectively connected with a first winding drum and a second winding drum, the middle part inside the mounting frame plate is longitudinally provided with a sliding column, the front top and bottom of the sliding column are respectively provided with a first connecting shaft and a fifth connecting shaft, the outer wall cover of traveller is equipped with tensile adapter sleeve, tensile adapter sleeve openly top, middle part and below are equipped with connecting axle two, connecting axle three and connecting axle four respectively, the winding reel one and winding reel two go up the winding respectively have wire rope one and wire rope two, the other end of wire rope one is knotted through the conversion of connecting axle and is connected on connecting axle two, the other end of wire rope two is knotted through the five conversion of connecting axle and is connected on connecting axle four, the installation frame board top left and right sides all articulates there is the earth clamping plate, connecting axle three is connected with the transmission shaft through the round pin axle, the other end of transmission shaft is articulated with earth clamping plate.

The invention has the following beneficial effects: the invention provides a novel square pile construction method of a rotary drilling rig, which can be used for square pile construction in the whole process by using equipment, effectively reduces the underground operation of labor personnel and avoids the project safety production risk from the source. The invention also provides three square pile drill bits and a square pile hole cleaning drill in cooperation with the square pile construction method, and further realizes the whole-process mechanization of square pile construction.

Drawings

FIG. 1 is a schematic flow diagram of a square pile construction method of a rotary drilling rig according to the invention;

FIG. 2 is a schematic view of a lower pile bit configuration according to one embodiment of the present invention;

FIG. 3 is a schematic sectional view A-A of FIG. 2;

FIG. 4 is a schematic cross-sectional view B-B of FIG. 2;

FIG. 5 is a schematic diagram of the right view structure of FIG. 2;

FIG. 6 is a schematic diagram of a second actuator for one embodiment of the square pile drill of FIG. 2;

FIG. 7 is a schematic top view of the structure of FIG. 2;

FIG. 8 is a schematic perspective view of FIG. 2;

FIG. 9 is a schematic view of a first actuator of another embodiment of the square pile drill bit of FIG. 2;

FIG. 10 is a schematic view of a second implementation of the square pile drill bit of FIG. 2;

FIG. 11 is a schematic view of a lower pile bit according to a second embodiment of the present invention;

FIG. 12 is a schematic bottom view of FIG. 11;

FIG. 13 is a schematic top view of the structure of FIG. 11;

FIG. 14 is a schematic view of the structure A-A of FIG. 13;

FIG. 15 is a schematic view of the structure B-B of FIG. 14;

FIG. 16 is a schematic perspective view of FIG. 11;

FIG. 17 is a schematic view of two actuator components of the square pile drill bit of FIG. 11;

FIG. 18 is a perspective view of a first cutting implement;

FIG. 19 is a perspective view of a second cutting element;

FIG. 20 is a schematic top view of a third embodiment of a lower pile drill bit according to the present invention;

FIG. 21 is a front view of the structure of FIG. 20;

FIG. 22 is a cross-sectional view taken along line A-A of FIG. 20;

FIG. 23 is a cross-sectional view taken along line B-B of FIG. 21;

FIG. 24 is a schematic cross-sectional view of a grinding cup of the square pile drill bit of FIG. 20;

FIG. 25 is a schematic view of a grinding head of the square pile drill of FIG. 20;

FIG. 26 is a schematic view of a down-hole pile hole cleaning drill according to an embodiment of the present invention (closed state);

FIG. 27 is a left side elevational view of FIG. 26;

FIG. 28 is a perspective view of FIG. 26;

fig. 29 is a schematic view showing an expanded structure of the soil clamping plate of the square pile hole cleaning drill in fig. 26.

Detailed Description

The technical solution of the present invention will be clearly and completely described below with reference to the accompanying drawings. It is to be understood that the described embodiments are merely exemplary of the invention, and not restrictive of the full scope of the invention. Unless otherwise specified, the technical means used in the examples are conventional means well known to those skilled in the art.

In the description of the present invention, it is to be understood that the terms "longitudinal", "lateral", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", and the like, indicate orientations or positional relationships based on those shown in the drawings, are merely for convenience of description of the present invention, and do not indicate or imply that the referenced devices or elements must have a particular orientation, be constructed and operated in a particular orientation, and thus, are not to be construed as limiting the present invention.

The first purpose of the invention is to provide a rotary drilling rig square pile construction method, which adopts different construction machinery, processes, drilling tools and the like according to different geological structures and different design specifications of square anti-slide piles, and the embodiment of the invention takes the square pile with the design specification (2.0m multiplied by 3.0m) as an example. As shown in fig. 1, the illustrated construction method specifically includes the steps of:

s1: leveling the field: and leveling and compacting the ground at the construction position in advance.

S2: and (3) measurement and paying-off: and measuring data on a flat field, paying off the field, and marking the drilling and digging position to be constructed.

S3: well head concrete dado: and pouring the protecting wall by concrete at the drilling and digging position required to be constructed.

S4: positioning a drilling machine: the drilling machine moves to the position of the protective wall, and the ground is compacted before the drilling machine is in place, so that the stability of the drilling machine is ensured, and the drilling machine cannot incline or move due to settlement in the drilling process.

S5: adjusting verticality of a drilling machine: in order to ensure the perpendicularity of the pile foundation after hole forming, the perpendicularity of a drill rod of the drilling machine is adjusted according to a level gauge arranged on the drilling machine, so that the drill rod of the drilling machine corresponds to the center position of the retaining wall.

S6: drilling a guide hole: and a guide hole is arranged in the retaining wall, and drilling is carried out based on the guide hole to form a square pile drilling hole.

The drilling of the pilot hole in step S6 is specifically divided into the following 2 drilling modes according to different geological structures:

A. a hole leading drilling mode 1, a four-corner hole leading method: the geological survey report reveals that the stratum structure is stable, and the pile foundation of the hole is difficult to collapse, a phi 800mm circular cutting pick bailing drill bit (taking a square pile with the design specification (2.0m multiplied by 3.0m) as an example) is adopted to open quincunx lead holes at 4 corners of the pile foundation, and each lead hole is drilled to the elevation of the designed hole bottom.

B. A pilot hole drilling mode 2, a single-hole pilot hole method: in order to prevent pile holes from deviating, a lead hole is opened in the direction of the pile foundation deviating from the far end of a drilling machine according to the landform and site conditions, and the pile foundation is drilled to the designed hole bottom elevation;

s7: drilling a compound hole: and continuously drilling a re-hole on the basis of drilling the lead hole, and forming a preformed hole after the lead hole and the re-hole are drilled.

According to different geological structures, the compound hole drilling specifically comprises the following two hole forming modes, which respectively correspond to the modes 1 and 2 of the step S6:

A. a compound hole drilling mode 1, a four-corner hole leading method: and (3) drilling the quincunx hole-leading pile foundation with stable geology by using a rotary drilling rig to drill in the center of the square pile by adopting a phi 2000mm circular cutting pick sand-fetching drill until the height of the designed pile bottom reaches the pre-drilling hole (corresponding to the mode 1 in the step 6: the four-corner hole-leading method).

B. A compound hole drilling mode 2, a single hole leading method: the geological survey report reveals that the stratum structure is unstable, the pile foundation with the single guide hole is easy to collapse, and a phi 1500mm or phi 1800mm circular cutting pick sand-fetching drill is adopted to drill on the square pile by the near end of the rotary drilling rig until the pile bottom elevation reaches the pre-formed hole (corresponding to the mode 2 in the step 6: the single guide hole method).

Because the geological structure of the pile foundation by the single-hole guiding method is unstable, if the collapse is serious in the drilling process, the follow-up construction is carried out reasonably and timely by adopting a mud retaining wall or a deep foundation square pile steel retaining wall.

S8: drilling a square hole: and after pre-drilling is achieved through the hole leading drilling and the hole re-drilling of the drilling machine, square hole drilling is carried out, the kinetic energy of the drilling machine is utilized and converted through a kinetic energy transmission part mechanism, transverse rotation kinetic energy is converted into longitudinal rotation kinetic energy, and then tunneling and trimming are carried out through a square pile drill bit execution part mechanism. In the drilling process of the square hole, if the protective cylinder needs to be buried when the hole collapse is serious, the size of each side is increased by 100mm according to the design specification, and the square steel protective cylinder is manufactured according to the length corresponding to the depth of the hole collapse and is lowered to be below the elevation of the hole collapse, so that the wall protection and the hole collapse prevention are achieved. Because a large amount of hole slag on the hole wall drops to the hole bottom of the preformed hole in the square hole drilling process, and the square pile drill bit does not have the slag fishing function, the circular drill bit slag fishing and the square hole drilling are repeatedly carried out in the square hole drilling process until the square hole is drilled to the designed hole bottom elevation.

S9: round drilling and hole cleaning: and step S8, cleaning sediments at the bottom of the hole, cleaning sediments at four corner points by using a phi 800mm hole cleaning drill, cleaning the whole bottom of the hole by using a phi 2000mm hole cleaning drill, and repeatedly and flatly cleaning the bottom of the hole from one end to the other end until the sediments at the bottom of the hole are basically cleaned.

S10: square drilling and hole cleaning: the method comprises the following steps of cleaning sediment at the bottom of a hole by using a square hole cleaning drill bit, wherein the principle of square hole cleaning is that a movable connecting rod is combined with a double-hinge slag clamping plate, the central movable connecting rod is slowly lifted under the action of strong self gravity of a hole cleaner, the double-hinge slag clamping plate is automatically closed to completely scrape the sediment at the bottom of the hole to the center of the bottom of the hole and form an inverted triangular slag clamping space, and then a drill rod of a rotary drilling rig is used for lifting the hole cleaner of a square pile.

S11: and (3) measuring sediment: measuring the sediment at the bottom of the hole by using a sediment plate after the square drill is used for cleaning the hole, and performing the next process after the sediment plate is qualified; if the hole is not qualified, the hole can be cleaned for two or more times, and the circular hole cleaning drill bit can be used for cleaning the hole repeatedly.

S12: and (3) manufacturing and installing a steel reinforcement cage: preparing materials and primarily processing the reinforcement cage in a special processing plant according to design requirements; and binding and welding forming are carried out on the construction site.

The construction key points of the manufacturing and installation of the reinforcement cage in the step S12 are as follows: the diameter reinforcing bar specification of the reinforcement cage is according to the design requirement; the thickness of the protective layer of the steel reinforcement cage is 50 mm; the section of the main rib cannot be damaged during welding; the manufacturing and stacking site is kept flat and clean, covered with a lower cushion and is rain-proof and waterproof.

Hoisting steel bars: the rear of the steel reinforcement cage folding experience lattice can be hoisted and placed, and the inspection content is as follows: the length and the diameter of the cage meet the requirements; whether the welding of the hoisting framework at the top of the steel reinforcement cage meets the safe hoisting construction, whether the length of the longitudinal bar anchored into the crown beam of the support pile meets the design requirement,

the square pile reinforcement cage is hoisted in a parallel mode through a four-corner supporting hoisting framework, the square pile reinforcement cage is hoisted in a high mode and slowly hoisted when being hoisted and lowered, meanwhile, a specially-assigned person is used for righting the square pile reinforcement cage in four directions, the fact that the wall of a square pile hole is scraped by a tool bit is avoided as much as possible, and the situation that dregs on the hole wall fall to form hole bottom sediments is avoided.

S13: pouring concrete: the concrete pouring adopts an underwater concrete pouring method, the designed cross section of the square pile is larger, two groups of guide pipes are adopted for simultaneous construction, and the process flow comprises the following steps: the crane is in place, the hole depth is measured, the length of the guide pipe is calculated, the guide pipe is arranged below the crane, and concrete pouring is carried out.

Wherein, the length of the guide pipe is determined according to the actually measured hole depth, and the discharging gap of the hole bottom is controlled by 200 mm-400 mm from the lower end of the guide pipe to the hole bottom in construction.

The requirement of initial irrigation: the initial irrigation amount is a key index of concrete irrigation, and the depth of the conduit embedded after the initial irrigation is ensured to be not less than 2.0 m.

Pouring concrete: the concrete strength is underwater concrete according to the design requirement, and the mixing proportion is provided by a mixing station and strictly executed. Measuring the rising height of the concrete surface in time after concrete pouring each time, calculating the buried depth of the guide pipe, and detaching the guide pipe in time, wherein the buried depth of the guide pipe is not suitable to be larger than 8.0 m; after the conduit is detached every time, the embedding depth of the conduit is not less than 3.0 m; when the concrete is confirmed to be poured to the pile top, the elevation of the concrete surface is carefully detected, and the guide pipe can be lifted after the concrete is confirmed to be qualified. Manpower and material resources are required to be well organized in the concrete pouring process, continuous pouring is required, the middle pause is avoided, and the underwater pouring of concrete is required to be completed in the shortest time. Controlling the last pouring amount, wherein the pile top cannot be lowered, a floating slurry layer in contact with concrete exists on the upper layer of the concrete and needs to be chiseled off, the height of the concrete needs to exceed 500mm, the part above the designed elevation is chiseled by manual work or manual cooperation with an air pick, and a pouring recorder makes pouring records in the pouring process.

In the concrete pouring process, if a pile foundation embedded with a square steel casing exists, an appropriate amount of over-pouring coefficient is calculated according to the volume of the casing and the hole collapse condition outside the casing, and appropriate amount of over-pouring is carried out, and the steel casing is pulled out in real time by using machinery such as a crane and the like after the concrete pouring is finished. And after concrete pouring is completed for 48 hours, manually or manually matching the part above the designed pile top elevation with an air pick to pick and chisel according to design requirements, and breaking the pile head. And then pile foundation detection can be carried out after the maintenance period is reached according to the relevant standard requirements to finish maintenance pile forming.

A second object of the present invention is to provide a novel square pile drill in accordance with the above construction method (mainly used in step S8 of the above construction method).

One embodiment of the square pile drill bit is a square pile drill bit for square bored pile foundation as shown in fig. 2-10. It should be noted that: the term "pouring" used for pouring pile foundation does not refer to a specific process, and does not refer to S13 in the above construction method, but refers to the form of pile forming, i.e., "pouring pile forming"; the square pile drill used here is mainly used in the above-described working process step S8. The square pile drill comprises a box body 14, and a power driving device, a power transmission mechanism and an executing device are installed on the box body 14. The case 14 has a rectangular parallelepiped shape. The power driving device comprises a first power transmission shaft 18, a power input first connecting square head 11, a lifting pressure plate 15 and a pressure transmission plate 12. A first power transmission shaft 18 is arranged in the middle of the box body 14, and the first power transmission shaft 18 is rotatably connected with the box body 14 through a bearing 17. The number of the bearings 17 is two, the two bearings 17 are respectively located in circular holes of upper and lower wall plates of the box body 14, and the upper and lower sides of the bearings 17 are respectively provided with a first bearing plate 13 and a second bearing plate 16. The first bearing plate 13, the second bearing plate 16 and the box 14 are connected through screws. The bearing 17 is installed between the first bearing plate 13 and the second bearing plate 16, the bearing 17 is fixed through the first bearing plate 13 and the second bearing plate 16, the upper end of the box body 14 is connected with a lifting pressure plate 15 through a screw, a blocking shoulder 130 is arranged on the outer wall of the upper side of the first power transmission shaft 18, and the blocking shoulder 130 is located in the lifting pressure plate 15. The lower side of the blocking shoulder 130 is provided with a pressure conduction plate 12, and the pressure conduction plate 12 is fixedly connected to the upper side of the box body 14. The shoulder 130 and the first power transmission shaft 18 are integrally formed, and the structure is stable.

As shown in fig. 3 and 4, a power input first connecting square head 11 is fixedly connected to the upper side of the first power transmission shaft 18. When the square pile drilling machine is used, the square pile drilling bit is connected to an existing rotary drilling machine through the first connecting square head 11, and the rotary drilling machine drives the first connecting square head 11 to rotate, so that power input is achieved.

The power driving device is connected with a power transmission mechanism, and the power transmission mechanism comprises a first driving sprocket 19, a second driving sprocket 110, a power input sprocket 127, a first chain 128, a reversing transmission case 123, a transmission shaft 122, a first sprocket 129, a second sprocket 121 and a second chain 126. The middle part of the first power transmission shaft 18 is connected with a first driving sprocket 19 and a second driving sprocket 110 through screws. The first drive sprocket 19 is located on the upper side of the second drive sprocket 110. The left side and the right side of the inner cavity of the box body 14 are both connected with reversing transmission boxes 123 through bolts, and the reversing transmission boxes 123 are T-shaped reversing transmission boxes, such as T-series spiral bevel gear steering gears, and are mature in the prior art. The transmission mode of the reversing transmission case 123 is speed reduction transmission, which is mature prior art, and the matching ratio (speed ratio) can be adjusted according to the size of the gear. And the rotation speed can be controllably reduced by adopting speed reduction transmission. The upper end of the input shaft of the reversing transmission case 123 is connected with a power input chain wheel 127 through a screw, the power input chain wheel 127 on the left side and the first driving chain wheel 19 are positioned at the same height, and the power input chain wheel 127 on the right side and the second driving chain wheel 110 are positioned at the same height. It should be noted that in fig. 4, the first driving sprocket 19 and the second driving sprocket 110 are overlapped, and only the first driving sprocket 19 is marked in the figure. A first chain 128 is installed between the power input sprocket 127 on the left side and the first drive sprocket 19, and between the power input sprocket 127 on the right side and the second drive sprocket 110. The front side and the rear side of the reversing transmission case 123 are provided with output shafts, and the output shaft of the reversing transmission case 123 is connected with a transmission shaft 122 through a coupler 124.

An actuator is connected to the power transmission mechanism and includes a first actuator member 118 and a second actuator member 112. The left side and the right side of the lower part of the box body 14 are respectively provided with a first executing component 118, the first executing component 118 is in transmission connection with a transmission shaft 122 through a first chain wheel 129, a second chain wheel 121 and a second chain 126, and one end of the transmission shaft 122 far away from the box body 14 is provided with a second executing component 112.

As shown in fig. 4 and 5, the first implement assembly 118 includes a rotating shaft body 120 and a first excavating implement 119. The first excavation executing member 119 is a hard convex structure. The rotating shaft 120 is rotatably connected to the box 14, and a first excavating actuator 119 is fixedly connected to an outer wall of the rotating shaft 120. The second chain wheel 121 is installed at both the front and rear ends of the rotation shaft body 120. The transmission shaft 122 is connected with a first chain wheel 129 through a screw, the first chain wheel 129 corresponds to the second chain wheel 121 in a left-right mode, a second chain 126 is installed between the first chain wheel 129 and the second chain wheel 121, and the transmission shaft 122 drives the rotating shaft body 120 to rotate through the second chain 126. The first excavating actuator 119 of the first implement component 118 is a rigid projection, preferably a "bullet" shaped projection. The arrangement of the first excavating actuators 119 may be uniform as shown in fig. 4 and 5, and parallel to the rotating shaft 120; as shown in fig. 9, the rotation shaft 120 may be spirally distributed on the surface thereof. The preferable scheme is as follows: the gap between the first excavating actuators 119 is 10-20 mm.

As shown in fig. 4 and 6, the second implement assembly 112 includes a tracked drive wheel 115, a tracked driven wheel 113, a track link 114, a second excavation implement 117, a power plate 116, and a driven shaft 125. The tracked drive wheels 115 are screwed to the end of the drive shaft 122 remote from the casing 14. Driven shafts 125 are rotatably connected to the left side and the right side below the box body 14, and crawler-type driven wheels 113 are connected to the front ends and the rear ends of the driven shafts 125 through bolts. The crawler-type driving wheels 115 and the crawler-type driven wheels 113 correspond to each other in position from left to right, and crawler-type caterpillar tracks 114 are installed between the crawler-type driving wheels 115 and the crawler-type driven wheels 113. The outer wall of the track caterpillar 114 is fixedly connected with a power plate 116, the front side and the rear side of the power plate 116 are respectively welded with a second excavating execution element 117, the transmission shaft 122 drives the track type driving wheel 115 to rotate, so that the track caterpillar 114 rotates, and the second excavating execution elements 117 rotate along with the track caterpillar 114. Each second actuating member 112 may be provided with a set of the second excavating actuating element 117 and the power plate 116, or may be provided with a plurality of sets of the second excavating actuating element 117 and the power plate 116 as shown in fig. 10. The second digging implement 117 is preferably "bullet-head" shaped. The preferred scheme is as follows: the "bullet" orientation of the second excavation implement 117 is maintained in a direction consistent with the direction of rotation of the tracked drive wheels 115.

As shown in fig. 3, a pull-up protection shaft 111 is screwed to the lower side of the case 14. The lifting protection shaft 111 is positioned at the lower side of the first power transmission shaft 18, and when the lifting pressing plate 15 fails, the lifting protection shaft 111 realizes anti-falling protection to prevent the first power transmission shaft 18 from falling.

The working principle of the embodiment is as follows: when the square pile drill bit works downwards, the downward pre-pressure is transmitted to the first power transmission shaft 18 through the power input first connecting square head 11, and the first power transmission shaft 18 transmits the pre-pressure to the box body 14 through the pressure transmission plate 12. When the square pile drill moves upwards, the first power transmission shaft 18 is engaged with the pulling pressure plate 15 through the shoulder 130, so as to transmit the pulling force to the box body 14. When power is input, the first power transmission shaft 18 is in a rotating state, the box body 14 is still, power is driven by the power head of the rotary drilling rig to be input into the first connecting square head 11, and a power source is input. The power transmission mechanism transmits power on the power driving device to the executing device, the rotary drilling rig power head inputs power into the first connecting square head 11 through the power to drive the first power transmission shaft 18 to rotate, the first power transmission shaft 18 drives the power input chain wheel 127 to rotate through the transmission of the first chain 128, the power input chain wheel 127 drives the output shaft of the reversing transmission box 123 to rotate, the output shaft of the reversing transmission box 123 drives the transmission shaft 122 to rotate, and the transmission shaft 122 drives the first executing component 118 and the second executing component 112 to work. The transmission shaft 122 drives the rotating shaft body 120 to rotate through the second chain 126, the first excavating execution element 119 rotates along with the rotating shaft body 120, the transmission shaft 122 can drive the crawler-type driving wheel 115 to rotate, the crawler-type driving wheel 115 drives the crawler-type caterpillar track 114 to rotate, the second excavating execution element 117 rotates along with the crawler-type caterpillar track 114 and is used for downward tunneling, the square pile drill head tunnels on the basis of the round hole, and the hole wall is cut to be flat.

Another embodiment of the square pile drill bit is shown in fig. 11-19, which is a cutting square pile drill bit including a power head member 21, a power transmission member 27, and a third actuator member 211. The power head part 21 includes a frame 22, a second connecting square head 24, a second power transmission shaft 25, and a pivoting support 26. Slewing bearing 26 is all installed to both sides about the frame 22 middle part, frame 22 rotates through slewing bearing 26 and is connected with second power transmission shaft 25, second power transmission shaft 25 upper end fixedly connected with second connection square head 24, and rotary drilling rig passes through second connection square head 24 input power, drives second power transmission shaft 25 and rotates.

The third executing parts 211 are uniformly arranged on the outer side edge of the frame 22. As shown in fig. 17-19, the third actuator 211 includes a drive shaft 215, a sleeve 216, and an actuator cutting element 212. The shaft sleeve 216 is connected to the outer side edge of the frame 22 through a screw, and the transmission shaft 215 is rotatably connected to the inside of the shaft sleeve 216 through a bearing. The implement cutting elements 212 include a first implement cutting element 217 and a second implement cutting element 218. The first and second

executive cutting elements

217 and 218 are fixedly connected to the lower ends of two adjacent transmission shafts 215, respectively, and the first and second

executive cutting elements

217 and 218 are distributed in a staggered manner. The cutting elements 212 are configured to perform cutting portions in a staggered manner, as shown in fig. 17, to thereby achieve cutting position abdicating and cross cutting. In one embodiment, a single first performing cutting element 217 includes a plurality of symmetrically disposed "double" shaped structures, the upper and lower sides of which are equally long, and a plurality of protrusions are disposed on the transverse structures. Correspondingly, a single second performing cutting element 218 comprises a plurality of symmetrically arranged line-shaped structures, the number, shape and size of the line-shaped structures all correspond to those of the second performing cutting element 217, and the line-shaped structures can be just clamped between the two transverse structures; similarly, a plurality of protrusions are arranged on the transverse structure of the I-shaped structure. When first implement cutting element 217 and second implement cutting element 218 are snap fit, the projections on the lateral structures of the two are staggered. In one embodiment (the illustrated embodiment), there are 3 "two" structures on a single first performing cutting element 217 and 3 "one" structures on a single second performing cutting element 218, respectively. As shown in fig. 12, a plurality of performing cutting elements 212 are arranged in a rectangular shape as a whole, and the performing cutting elements 212 are arranged in sequence along the inner wall of the housing, without interfering with each other, for cutting the square hole pile.

As shown in fig. 14 and 15, a power transmission component 27 is disposed between the third actuator 211 and the power head component 21, and the power transmission component 27 includes a driving sprocket 23, a first driven sprocket 29, a second driven sprocket 210, a first transmission chain 213 and a second transmission chain 214. Two driving chain wheels 23 are installed at the upper end of the second power transmission shaft 25, and the positions of the two driving chain wheels 23 correspond up and down. The upper end of the left transmission shaft 215 is connected with a first driven sprocket 29 through a screw, and the upper end of the right transmission shaft 215 is connected with a second driven sprocket 210 through a screw. The first driven sprocket 29 is positioned on the same plane as the upper drive sprocket 23, and the second driven sprocket 210 is positioned on the same plane as the lower drive sprocket 23. Install first drive chain 213 between the drive sprocket 23 of upside and the first driven sprocket 29, install second drive chain 214 between the drive chain 23 of downside and the second driven sprocket 210, drive first driven sprocket 29, second driven sprocket 210 through drive sprocket 23 and rotate, and then drive and carry out cutting element 212 and rotate, cut (in order to avoid too much influence of lines clean and tidy, first drive chain 213 and second drive chain 214 are not shown in fig. 14).

The driving sprocket 23 is matched with the first driven sprocket 29 and the second driven sprocket 210, and the outer diameters of the first driven sprocket 29 and the second driven sprocket 210 are the same. The length of the outer diameter of the driving sprocket 23 is greater than the length of the outer diameter of the first driven sprocket 29 and the second driven sprocket 210, i.e. the large sprocket drives the small sprocket to rotate, so as to achieve the purpose of transmission and acceleration.

Second power transmission shaft 25 is the step axle, just the step portion of second power transmission shaft 25 is located the frame 22 downside, realizes that second power transmission shaft 25 power input rotates, and frame 22 is in the static state, can realize simultaneously when slewing bearing 26 breaks down, and second power transmission shaft 25 step portion can realize supporting and protect function to frame 22. The slewing bearing 26 is an external-tooth-free slewing bearing. A protective cover 28 is connected to the upper side of the frame 22 through screws.

The working principle of the embodiment is as follows: the rotary drilling rig inputs power through the second connecting square head 24 to drive the second power transmission shaft 25 to rotate, and the second power transmission shaft 25 simultaneously drives the upper driving sprocket wheel 23 and the lower driving sprocket wheel 23 to rotate. Because the drive sprocket 23 of upside is connected with the transmission of first driven sprocket 29 through first drive chain 213, the drive sprocket 23 of downside is connected with the transmission of second driven sprocket 210 through second drive chain 214 to drive transmission shaft 215 and rotate, and then drive and carry out cutting element 212 and rotate, cut, drill out square hole stake on the basis of round hole stake.

A third embodiment of the square pile drill is shown in fig. 20-25, and the hydraulic type square pile drill for grinding comprises a box body 31, wherein grinding shaft sleeves 32 which are uniformly distributed are longitudinally arranged on the edge inside the box body 31. The lower ends of the grinding shaft sleeves 32 which are uniformly distributed penetrate through the lower side wall of the box body 31, extend to the outer end of the lower side of the box body 31 and are fixedly provided with grinding heads 33. The upper ends of the grinding bushings 32 penetrate through the upper side wall of the box body 31, extend to the outer end of the upper side of the box body 31 and are fixedly provided with hydraulic motors 34. An oil outlet is fixedly arranged on the side wall of the hydraulic motor 34, and an oil inlet is fixedly arranged at the upper end of the oil outlet. Symmetrical oil tanks 35 are fixedly arranged inside the tank body 31, and oil outlets and oil inlets are respectively connected with the corresponding oil tanks 35 through pipelines to realize oil inlet and outlet; the specific direction of oil inlet and outlet is shown by the direction of the arrows in fig. 22. The number of the oil tanks 35 may be plural, and 2 are illustrated as the case requires. A first motor 36 is fixedly arranged between the two oil tanks 35, and a first hydraulic pump 37 is fixedly arranged at the output end of the first motor 36. A first inlet and a first outlet are fixedly arranged on the side wall of the first hydraulic pump 37, a second motor 38 is fixedly arranged at the right end of the first motor 36, a second hydraulic pump 39 is fixedly arranged at the output end of the second motor 38, and a second inlet and a second outlet are fixedly arranged on the side wall of the second hydraulic pump 39. An oil outlet of the hydraulic motor 34 is fixedly connected with the oil tank 35, a first inlet of the first hydraulic pump 37 and a second inlet of the second hydraulic pump 39 are fixedly connected with the oil tank 35, and a first outlet of the first hydraulic pump 37 and a second outlet of the second hydraulic pump 39 are fixedly connected with the hydraulic motor 34.

An anti-rotation plate 310 is fixedly arranged on the upper side wall of the box body 31, and a third connecting square head 311 is longitudinally arranged inside the anti-rotation plate 310. The lower side wall of the third connecting square head 311 is fixedly connected with the upper side wall of the box body 31, symmetrical square head reinforcing plates 312 are fixedly arranged on the side wall of the third connecting square head 311, and one side, far away from the third connecting square head 311, of each square head reinforcing plate 312 is fixedly connected with the inner wall of the anti-rotation plate 310.

As shown in fig. 24, a grinding head transmission shaft 313 is longitudinally arranged inside the grinding shaft sleeve 32, a bearing spacer 318 is arranged between the grinding head transmission shaft 313 and the grinding shaft sleeve 32, and the lower end of the grinding head transmission shaft 313 is fixedly connected with the grinding head 33 through a bearing 319.

The upper end of the grinding head drive shaft 313 extends through the upper side wall of the grinding cup 32 and is fixedly connected to the output of the hydraulic motor 34. The upper end of the shaft wall of the grinding head drive shaft 313 is rotatably connected to the grinding cup 32 by a lock nut 314. A clamp 315 is fixedly provided at the lower end of the hydraulic motor 34. The clamp 315 is a connecting part of the hydraulic motor 34 and the grinding head drive shaft 313, and is specifically a structure composed of a key and a clamp. The grinding head drive shaft 313 is provided with holes and keys, which are correspondingly provided on the output shaft of the hydraulic motor 34. The clamp 315 provides a connection between the two locking clamps, as is well known in the art, and the connection between the hydraulic motor 34 and the grinding head drive shaft 313 may be provided by other known techniques. As shown in fig. 25, the grinding head 33 includes a cutter body 316 and a hard alloy material protrusion 317, and the protrusion 317 is uniformly arranged around the cutter body 316; the top square boss portion is shown as a square locating spigot on the body 316 portion of the grinding head 33.

The working principle of the embodiment is as follows: the third connecting square head 311 of the rotary drilling rig is directly and rigidly connected (rigidly connected) to the box body 31 of the square pile drill bit, and a square head reinforcing plate 312 is arranged between the third connecting square head 311 and the box body 31 to reinforce the connecting strength of the third connecting square head 311 and the box body 31. In this embodiment, the power of the grinding head 33 of the square pile drill is driven by a hydraulic system, which is driven by an independent motor. When the first electric motor 36 and the second electric motor 38 are powered on to rotate, the first hydraulic pump 37 and the second hydraulic pump 39 are driven to work, the first hydraulic pump 37 and the second hydraulic pump 39 respectively suck hydraulic oil from the oil tank 35 through the first inlet and the second inlet, the hydraulic oil is respectively transmitted to each hydraulic motor 34 through each oil outlet and each oil inlet through the first outlet and the second outlet through the hydraulic system, and then the hydraulic motors 34 are driven to rotate. The hydraulic motor 34 is mounted on the square pile bit case 31, and an output shaft of the hydraulic motor 34 is connected to a drive shaft 313 of the grinding head 33, thereby rotating the grinding head 33. The axes of the grinding heads 33 are regularly distributed along the four walls of the square pile drill box 31, and the hydraulic systems are connected in series or in parallel according to the actual working conditions, so that the rotation of all the grinding heads 33 on the four walls of the square pile drill box 31 is realized.

The third object of the present invention is to provide a novel square hole cleaning drill in cooperation with the above-mentioned construction method (mainly used in step S10 of the above-mentioned construction method). Specifically, as shown in fig. 26 to 29, the rotary drilling square pile hole cleaning drill includes a fourth connecting square head 41 for inputting power and a mounting machine frame plate 44. The bottom of the fourth connecting square head 41 is welded with a mounting plate, and the bottom of the mounting plate is connected with the outer ring of the slewing bearing 42 with external teeth; the inner ring of the slewing bearing 42 with the external teeth is screwed in the middle of the top of the mounting frame plate 44 through screws. The slewing bearing 42 is similar to a bearing structure, the inner ring and the outer ring are respectively provided with a mounting spigot and a mounting screw hole, and the inner ring and the outer ring can respectively and independently rotate; the slewing bearing 42 with external teeth has a tooth profile structure having an involute curve in its outer peripheral portion. The connection with the outer ring of the slewing bearing 42 here means that the mounting plate is connected with the outer ring part of the slewing bearing 42 through a positioning spigot and a screw, when the power input fourth connecting square 41 performs slewing motion, the outer ring part of the slewing bearing 42 can be driven to rotate so as to transmit power, and the inner ring part of the slewing bearing 42 is connected with the mounting frame plate 44, so that the mounting frame plate 44 is kept still. The mounting machine frame plate 44 is provided with movable grooves longitudinally on the left and right sides of the inner top, bearings are mounted on the inner walls of the movable grooves, and the inner walls of the bearings are connected with the outer walls of the connecting columns. The top of the connecting column extends to the outside of the mounting frame plate 44 and is connected to the drive gear 43. The outer ring of the slewing bearing with external teeth 42 is respectively meshed with each transmission gear 43. The bottoms of the connecting columns on the left side and the right side are respectively connected with a first winding reel 45 and a second winding reel 46. The power is input through the input fourth connecting square head 41, the external tooth slewing bearing 42 is driven to do slewing motion, and the slewing motion is respectively transmitted to the first winding reel 45 and the second winding reel 46 through the transmission gear 43, so that the first winding reel 45 and the second winding reel 46 are driven to rotate.

A sliding column is longitudinally arranged in the middle of the mounting machine frame plate 44, and a first connecting shaft 47 and a fifth connecting shaft 412 are respectively arranged at the top and the bottom of the front surface of the sliding column. The outer wall of the sliding column is sleeved with a stretching connecting sleeve 410, and a second connecting shaft 49, a third connecting shaft 414 and a fourth connecting shaft 413 are respectively arranged above, in the middle and below the front face of the stretching connecting sleeve 410. A first steel wire rope 48 and a second steel wire rope 411 are respectively wound on the first winding reel 45 and the second winding reel 46. The other end of the first steel wire rope 48 is connected to a second connecting shaft 49 through a first connecting shaft 47 in a conversion and knotting mode; the other end of the second steel wire rope 411 is connected to a fourth connecting shaft 413 through a fifth connecting shaft 412 in a conversion and knotting mode. The first steel wire rope 48 and the second steel wire rope 411 on the first winding drum 45 and the second winding drum 46 are used for taking up and paying off of one winding drum, and the outer diameters and the rotating angular speeds of the first winding drum 45 and the second winding drum 46 are completely consistent, so that the lengths of winding and paying off are equal. The left side and the right side of the top of the mounting machine frame plate 44 are hinged with soil clamping plates 416, the third connecting shaft 414 is connected with the transmission shaft 415 through a pin shaft, and the other end of the transmission shaft 415 is hinged with the soil clamping plates 416. The transmission shafts 415 are symmetrically arranged, and the number of the transmission shafts is equal to that of the soil clamping plates 416. When the first bobbin 45 rotates and the first steel wire rope 48 moves upwards for a short time, the stretching connecting sleeve 410 is driven to move upwards, the included angle between the transmission shafts 415 is reduced (only 1 transmission shaft 415 is shown in fig. 26 due to the view relation), and the soil clamping plate 416 is driven to fold inwards to perform soil clamping operation; meanwhile, the second steel wire rope 411 on the second bobbin 46 is lengthened with the same length. As shown in fig. 27, the power input fourth connecting square head 41 drives the second bobbin 46 to rotate in the opposite direction (the rotation direction is opposite to the arrow rotation direction in fig. 26, that is, the rotation direction is opposite to the rotation direction during soil clamping). it should be noted that, the direction shown in the figure is only schematic, in practice, clockwise rotation opening or counterclockwise rotation opening can be realized according to the actual situation and the winding direction of the wire, and the upper steel wire rope second 411 moves downwards and shortens, the soil clamping plate 416 has a downward opening trend under the action of self-weight, the stretching connecting sleeve 410 moves downwards, the included angle between the two transmission shafts 415 becomes larger, and the opening of the soil clamping plate 416 is realized; meanwhile, the first bobbin 45 rotates to lengthen the first wire rope 48 by the same length.

The outer wall of the soil clamping plate 416 is provided with a wear-resistant anti-corrosion layer, and the wear-resistant anti-corrosion layer is wear-resistant anti-corrosion paint, so that the service life is prolonged, and the wear resistance and the corrosion resistance are improved. The outer wall of the slewing bearing 42 with the external teeth and the outer wall of the transmission gear 43 are both provided with lubricating layers, and the lubricating layers are lubricating oil, so that the transmission performance is improved.

The working principle of the embodiment is as follows: the power is input through the fourth connecting square head 41, the external tooth slewing bearing 42 is driven to do slewing motion, and the slewing motion is respectively transmitted to the first winding reel 45 and the second winding reel 46 through the transmission gear 43, so that the first winding reel 45 and the second winding reel 46 are driven to rotate. The first wire rope 48 wound on the first bobbin 45 and the second wire rope 411 wound on the second bobbin 46 are wound in the forward and reverse directions, respectively. The first winding drum 45 and the second winding drum 46 rotate in the same direction, the first steel wire rope 48 and the second steel wire rope 411 on the first winding drum 45 and the second winding drum 46 take up and pay off by one winding drum, and the outer diameters and the rotating angular speeds of the first winding drum 45 and the second winding drum 46 are completely consistent, so that the lengths of winding and paying off are equal. The soil clamping plates 416 are pivotally connected to the mounting frame plate 44, and the soil clamping plates 416 are rotatable about respective rotational centers. Therefore, when power is input into the fourth connecting square head 41 to rotate in the positive direction, the first winding reel 45 rotates, the first steel wire rope 48 moves upwards to be shortened, the stretching connecting sleeve 410 is driven to move upwards, the included angle between the two transmission shafts 415 is shortened, the soil clamping plate 416 is driven to fold inwards to perform soil clamping operation, and meanwhile, the second steel wire rope 411 on the second winding reel 46 is lengthened to the same length. When power is input into the fourth connecting square head 41 to rotate reversely, the second winding reel 46 rotates reversely, the second steel wire rope 411 on the second winding reel moves downwards to shorten, the soil clamping plate 416 tends to open downwards under the action of self weight, the connecting sleeve 410 is stretched to move downwards, the included angle between the two transmission shafts 415 is increased, the soil clamping plate 416 is opened, and meanwhile, the first winding reel 45 rotates to enable the first steel wire rope 48 to be lengthened with the same length.

The above-described embodiments are only intended to describe the preferred embodiments of the present invention, and not to limit the scope of the present invention, and various modifications, variations, modifications, and substitutions which may be made by those skilled in the art to the technical solution of the present invention without departing from the spirit of the present invention are intended to fall within the scope of the present invention defined by the claims.

Claims

1. A rotary drilling rig square pile construction method is characterized in that: the method comprises the following steps:

s1: leveling the field;

s2: measuring and paying off;

s3: well head concrete dado;

s4: positioning a drilling machine;

s5: adjusting verticality of a drilling machine;

s6: drilling a guide hole: a guide hole is arranged in the protecting wall, and drilling is carried out based on the guide hole to form a square pile drilling hole;

s7: drilling a compound hole: continuously drilling a re-hole on the basis of drilling the lead hole, and forming a preformed hole after the lead hole drilling and the re-hole drilling;

s8: drilling a square hole: drilling a square hole after pre-forming the hole by the guide hole drilling and the compound hole drilling of the drilling machine;

s9: round drilling and hole cleaning: after step S8, performing hole bottom sediment cleaning, repeatedly sweeping the hole bottom from one end to the other end, and removing hole bottom sediment;

s10: square drilling and hole cleaning: and (5) continuously cleaning sediment at the bottom of the hole by using a square hole cleaning drill.

2. The rotary drilling rig square pile construction method according to claim 1, characterized in that: after step S10, the method further includes the following steps:

s11: measuring sediment;

s12: manufacturing and installing a reinforcing steel bar cage;

s13: and (5) pouring concrete.

3. The rotary drilling rig square pile construction method according to claim 1, characterized in that: according to different geological structures, the step S6 of drilling the pilot hole comprises the following 2 drilling modes:

(1) four-corner hole leading method: for a pile foundation with a stable stratum structure, a quincuncial guide hole is formed at each angle of 4 corners of the pile foundation by adopting a circular cutting pick bailing drill bit, and each guide hole is drilled to reach the elevation of the bottom of a designed hole;

4. The rotary drilling rig square pile construction method according to claim 1, characterized in that: according to different geological structures, the step S7 of hole-recovery drilling comprises the following 2 hole-forming modes:

(1) four-corner hole leading method: for a pile foundation with a stable stratum structure, drilling at the center of a square pile by adopting a circular cutting pick sand fishing drill until the pile foundation is drilled to the designed pile bottom elevation to reach a preformed hole;

(2) single hole guiding method: for the pile foundation with unstable stratum structure, a round cutting pick sand-fishing drill is adopted to drill on the square pile by the near end of the rotary drilling rig until the designed pile bottom elevation is reached to pre-drilling, and the size of the round cutting pick sand-fishing drill is smaller than that of the round cutting pick sand-fishing drill bit in the mode (1).

5. The rotary drilling rig square pile construction method according to claim 1, characterized in that: s8 square hole drilling is carried out by adopting a square pile drill bit, the square pile drill bit comprises a box body (14), the box body (14) is provided with a power driving device, a power transmission mechanism and an executing device, the power driving device is connected with the power transmission mechanism, the power transmission mechanism comprises a first driving chain wheel (19), a second driving chain wheel (110), a power input chain wheel (127), a first chain (128), a reversing transmission box (123), a transmission shaft (122), a first chain wheel (129), a second chain wheel (121) and a second chain (126), the middle part of the power transmission shaft (18) is connected with the first driving chain wheel (19) and the second driving chain wheel (110), the first driving chain wheel (19) is positioned at the upper side of the second driving chain wheel (110), the left side and the right side of the inner cavity of the box body (14) are both connected with the reversing transmission boxes (123), the upper end of the input shaft of the reversing transmission box (123) is connected with the power input chain wheel (127), first chains (128) are arranged between the power input chain wheel (127) on the left side and the first driving chain wheel (19) and between the power input chain wheel (127) on the right side and the second driving chain wheel (110), output shafts are arranged on the front side and the rear side of the reversing transmission box (123), and the output shafts of the reversing transmission box (123) are connected with transmission shafts (122) through couplers (124).

6. The rotary drilling rig square pile construction method according to claim 5, characterized in that: the power driving device comprises a power transmission shaft (18), a first connecting square head (11), a lifting pressure plate (15) and a pressure conduction plate (12), the power transmission shaft (18) is installed in the middle of the box body (14), the power transmission shaft (18) is rotatably connected with the box body (14) through a bearing (17), a first bearing plate (13) and a second bearing plate (16) are respectively arranged on the upper side and the lower side of the bearing (17), the first bearing plate (13) and the second bearing plate (16) are fixedly connected with the box body (14), the upper end of the box body (14) is connected with the lifting pressure plate (15), a retaining shoulder (130) is arranged on the outer wall of the upper side of the power transmission shaft (18), the retaining shoulder (130) is located in the lifting pressure plate (15), the pressure conduction plate (12) is arranged on the lower side of the retaining shoulder (130), and the pressure conduction plate (12) is fixedly connected to the upper side of the box body (14), the upper side of the power transmission shaft (18) is fixedly connected with a power input first connecting square head (11).

7. The rotary drilling rig square pile construction method according to claim 6, characterized in that: the power transmission mechanism is connected with an executing device, the executing device comprises a first executing component (118) and a second executing component (112), the left side and the right side of the lower portion of the box body (14) are respectively provided with the first executing component (118), the first executing component (118) is in transmission connection with a transmission shaft (122) through a first chain wheel (129), a second chain wheel (121) and a second chain (126), and the second executing component (112) is arranged at one end, far away from the box body (14), of the transmission shaft (122).

8. The rotary drilling rig square pile construction method according to claim 7, characterized in that: first executive component (18) are including rotatory axis body (120) and first excavation execute component (19), rotatory axis body (120) rotate with box (4) and are connected, rotatory axis body (120) outer wall fixedly connected with excavates first executive component (119), second sprocket (121) are all installed at both ends around rotatory axis body (120), transmission shaft (122) are connected with first sprocket (129), correspond about first sprocket (129) and follow second sprocket (121) position, install second chain (126) between first sprocket (129) and second sprocket (121).

9. The rotary drilling rig square pile construction method according to claim 8, characterized in that: the second execution component (112) comprises a crawler-type driving wheel (115), a crawler-type driven wheel (113), a crawler-type chain track (114), a second excavating execution element (117), a power plate (116) and a driven shaft (125), the crawler-type driving wheel (115) is connected with one end of the transmission shaft (122) far away from the box body (14), the left side and the right side below the box body (14) are both rotationally connected with driven shafts (125), the front end and the rear end of the driven shaft (125) are both connected with crawler-type driven wheels (113), the crawler-type driving wheel (115) and the crawler-type driven wheel (113) correspond to each other in position from left to right, a crawler track (114) is arranged between the crawler driving wheel (115) and the crawler driven wheel (113), the outer wall of the track caterpillar track (114) is fixedly connected with a power plate (116), and the front side and the rear side of the power plate (116) are both connected with second excavating execution elements (117).

10. The rotary drilling rig square pile construction method according to claim 9, characterized in that: the lower side of the box body (14) is connected with a lifting protection shaft (111), and the lifting protection shaft (111) is positioned on the lower side of the first power transmission shaft (18).

11. The rotary drilling rig square pile construction method according to claim 1, characterized in that: step S8 square hole drilling is carried out by adopting a square pile drill bit, the square pile drill bit comprises a power head part (21), a power transmission part (27) and a third execution part (211), the power head part (21) comprises a rack (22), a second connecting square head (24), a second power transmission shaft (25) and a slewing bearing (26), the slewing bearing (26) is installed on the upper side and the lower side of the middle part of the rack (22), the rack (22) is rotatably connected with the second power transmission shaft (25) through the slewing bearing (26), the upper end of the second power transmission shaft (25) is fixedly connected with the second connecting square head (24), and the third execution part (211) is evenly installed on the outer edge of the outer side of the rack (22).

12. The rotary drilling rig square pile construction method according to claim 11, characterized in that: the actuating component (211) comprises a transmission shaft (215), a shaft sleeve (216) and an actuating cutting element (212), the shaft sleeve (216) is connected to the outer side edge of the frame (22), and the transmission shaft (215) is rotatably connected to the interior of the shaft sleeve (216) through a bearing.

13. The rotary drilling rig square pile construction method according to claim 12, characterized in that: the implement cutting elements (212) comprise first implement cutting elements (217) and second implement cutting elements (218), the first implement cutting elements (217) and the second implement cutting elements (218) are fixedly connected to the lower ends of two adjacent transmission shafts (215), and the first implement cutting elements (217) and the second implement cutting elements (218) are distributed in a staggered mode.

14. The rotary drilling rig square pile construction method according to claim 13, characterized in that: a power transmission component (27) is arranged between the third execution component (211) and the power head component (21), the power transmission part (27) comprises a driving chain wheel (23), a first driven chain wheel (29), a second driven chain wheel (210), a first transmission chain (213) and a second transmission chain (214), two drive sprocket (23) are installed to second power transmission shaft (25) upper end, two drive sprocket (23) position corresponds from top to bottom, and is left drive shaft (215) upper end is connected with first driven sprocket (29), the right side drive shaft (215) upper end is connected with second driven sprocket (210), the upside install first drive chain (213) between drive sprocket (23) and first driven sprocket (29), downside install second drive chain (214) between drive sprocket (23) and second driven sprocket (210).

15. The rotary drilling rig square pile construction method according to claim 14, characterized in that: the second power transmission shaft (25) is a stepped shaft, and the stepped portion of the second power transmission shaft (25) is located on the lower side of the rack (22).

16. The rotary drilling rig square pile construction method according to claim 14, characterized in that: the driving chain wheel (23) is matched with the first driven chain wheel (29) and the second driven chain wheel (210) in an equal mode, the outer diameter lengths of the first driven chain wheel (29) and the second driven chain wheel (210) are the same, and the outer diameter length of the driving chain wheel (23) is larger than the outer diameter lengths of the first driven chain wheel (29) and the second driven chain wheel (210).

17. The rotary drilling rig square pile construction method according to claim 14, characterized in that: the slewing bearing (26) is an external tooth-free slewing bearing.

18. The rotary drilling rig square pile construction method according to claim 1, characterized in that: s8 square hole drilling is carried out by adopting a square pile drill bit, the square pile drill bit comprises a box body (31), grinding shaft sleeves (32) which are uniformly distributed are longitudinally arranged at the edge inside the box body (31), the lower ends of the grinding shaft sleeves (32) which are uniformly distributed penetrate through the lower side wall of the box body (31) and extend to the lower end of the box body (31), grinding heads (33) are fixedly arranged, the upper end of each grinding shaft sleeve (32) penetrates through the upper side wall of the box body (31) and extends to the upper end of the box body (31), a hydraulic motor (34) is fixedly arranged, an oil outlet is fixedly arranged on the side wall of the hydraulic motor (34), an oil inlet is arranged at the upper end of the oil outlet, oil tanks (35) are fixedly arranged inside the box body (31), at least 2 oil tanks (35) are arranged, and a motor and a hydraulic pump are fixedly arranged between each oil tank (35).

19. The rotary drilling rig square pile construction method according to claim 18, characterized in that: the motor comprises a first motor (36), a first hydraulic pump (37) is fixedly arranged at the output end of the first motor (36), a first inlet and a first outlet are fixedly arranged on the side wall of the first hydraulic pump (37), a second motor (38) is fixedly arranged at the right end of the first motor (36), a second hydraulic pump (39) is fixedly arranged at the output end of the second motor (38), and a second inlet and a second outlet are fixedly arranged on the side wall of the second hydraulic pump (39).

20. The rotary drilling rig square pile construction method according to claim 19, characterized in that: an oil outlet of the hydraulic motor (34) is connected with an oil tank (35), a first inlet of the first hydraulic pump (37) and a second inlet of the second hydraulic pump (39) are both connected with the oil tank (35), and a first outlet of the first hydraulic pump (37) and a second outlet of the second hydraulic pump (39) are both connected with the hydraulic motor (34).

21. The rotary drilling rig square pile construction method according to claim 19, characterized in that: the fixed anti-rotating plate (310) that is provided with of last lateral wall of box (31), the inside of anti-rotating plate (310) vertically is provided with third connection square head (311), the lower lateral wall of third connection square head (311) with the last lateral wall fixed connection of box (31), the fixed square head reinforcing plate (312) that is provided with the symmetry of lateral wall of third connection square head (311), one side that third connection square head (311) was kept away from in square head reinforcing plate (312) with the inner wall fixed connection of anti-rotating plate (310).

22. The rotary drilling rig square pile construction method according to claim 21, characterized in that: the grinding machine is characterized in that a grinding head transmission shaft (313) is longitudinally arranged in the grinding shaft sleeve (32), the lower end of the grinding head transmission shaft (313) is fixedly connected with the grinding head (33), the upper end of the grinding head transmission shaft (313) penetrates through the upper side wall of the grinding shaft sleeve (32) and is fixedly connected with the output end of the hydraulic motor (34), and the upper end of the shaft wall of the grinding head transmission shaft (313) is rotatably connected with the grinding shaft sleeve (32).

23. The rotary drilling rig square pile construction method according to claim 18, characterized in that: the grinding head (33) comprises a cutter body (316) and protruding parts (317), and the protruding parts (317) are uniformly distributed around the cutter body (316).

24. The rotary drilling rig square pile construction method according to claim 1, characterized in that: step S10 the square hole cleaning drill bit is a square pile hole cleaning drill and comprises a power input fourth connecting square head (41) and a mounting machine frame plate (44), a mounting plate is connected to the bottom of the power input fourth connecting square head (41), the bottom of the mounting plate is connected with an outer ring of an external tooth-equipped slewing bearing (42), the inner ring of the external tooth-equipped slewing bearing (42) is connected to the middle of the top of the mounting machine frame plate (44), movable grooves are longitudinally formed in the left side and the right side of the inner top of the mounting machine frame plate (44), a bearing is installed on the inner wall of each movable groove, the inner wall of each bearing is connected with the outer wall of a connecting column, the top of the connecting column is connected with a transmission gear (43), the outer ring of the external tooth-equipped slewing bearing (42) is meshed with the transmission gear (43), the bottoms of the connecting columns are respectively connected with a first winding drum (45) and a second winding drum (46) on the left side and the right side, a sliding column is longitudinally arranged in the middle of the mounting machine frame plate (44), the device is characterized in that a first connecting shaft (47) and a fifth connecting shaft (412) are respectively arranged at the top and the bottom of the front face of the sliding column, a stretching connecting sleeve (410) is sleeved on the outer wall of the sliding column, a second connecting shaft (49), a third connecting shaft (414) and a fourth connecting shaft (413) are respectively arranged above, in the middle and below the front face of the stretching connecting sleeve (410), a first steel wire rope (48) and a second steel wire rope (411) are respectively wound on the first bobbin (45) and the second bobbin (46), the other end of the first steel wire rope (48) is connected to the second connecting shaft (49) through a first connecting shaft (47) in a conversion and knotting manner, the other end of the second steel wire rope (411) is connected to the fourth connecting shaft (413) through the fifth connecting shaft (412) in a conversion and knotting manner, soil clamping plates (416) are hinged to the left side and the right side of the top of the mounting frame plate (44), and the third connecting shaft (414) is connected with a transmission shaft (415) through a pin shaft, the other end of the transmission shaft (415) is hinged with the soil clamping plate (416).