CN110258540B - Construction method of cast-in-situ bored pile - Google Patents
Construction method of cast-in-situ bored pile Download PDFInfo
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- CN110258540B CN110258540B CN201910554442.3A CN201910554442A CN110258540B CN 110258540 B CN110258540 B CN 110258540B CN 201910554442 A CN201910554442 A CN 201910554442A CN 110258540 B CN110258540 B CN 110258540B
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D15/00—Handling building or like materials for hydraulic engineering or foundations
- E02D15/08—Sinking workpieces into water or soil inasmuch as not provided for elsewhere
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D17/00—Excavations; Bordering of excavations; Making embankments
- E02D17/06—Foundation trenches ditches or narrow shafts
- E02D17/08—Bordering or stiffening the sides of ditches trenches or narrow shafts for foundations
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D5/00—Bulkheads, piles, or other structural elements specially adapted to foundation engineering
- E02D5/22—Piles
- E02D5/34—Concrete or concrete-like piles cast in position ; Apparatus for making same
- E02D5/38—Concrete or concrete-like piles cast in position ; Apparatus for making same making by use of mould-pipes or other moulds
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D2300/00—Materials
- E02D2300/0004—Synthetics
- E02D2300/0018—Cement used as binder
- E02D2300/0023—Slurry
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Abstract
The invention discloses a construction method of a cast-in-situ bored pile, which comprises the following steps: step one, drilling a pile foundation groove by using a drilling machine; step two, cleaning the hole for the first time; step three, installing a sleeve; step three, mixing wall protection slurry; drilling a pile foundation hole; step five, cleaning the hole for the second time; hoisting the reinforcement cage, vertically placing the reinforcement cage into the pile foundation hole by using a hoisting machine, wherein the hoisting machine comprises a base, a fixing frame, an upper mounting plate, a fixing cover detachably connected and fixed with the upper mounting plate, a hoisting device fixed on the upper mounting plate, a protective air bag arranged in the reinforcement cage and an air blowing device, a plurality of protective bulges are arranged on the outer side wall of the protective air bag, and the protective bulges protrude out of the outer side wall of the reinforcement cage; sixthly, dismantling the hoisting machine; step seven, pouring concrete; and step eight, concrete curing. The invention has the following effects: the construction method is beneficial to preventing the quality of the manufactured pile foundation from being influenced by the fact that underground water permeates into the pile foundation hole.
Description
Technical Field
The invention relates to the field of buildings, in particular to a construction method of a cast-in-situ bored pile.
Background
The cast-in-place pile system is a pile formed by forming a pile hole in foundation soil through mechanical drilling, steel pipe soil extrusion or manual excavation and the like on an engineering site, placing a reinforcement cage and cast-in-place concrete in the pile hole, and the cast-in-place pile can be divided into a immersed tube cast-in-place pile, a cast-in-place pile and a cast-in-place pile according to different hole forming methods. The construction method of the cast-in-situ bored pile generally comprises two methods, one is a mud retaining wall construction method, and the construction process comprises the following steps: drilling, embedding a protective cylinder, preparing slurry, drilling, cleaning holes and pouring concrete; the other one is a full casing construction method, and the construction process comprises the following steps: the method comprises the steps of leveling a field, laying a working platform, installing a drilling machine, pressing a sleeve, drilling a hole, placing a reinforcement cage, placing a guide pipe, pouring concrete, drawing the sleeve and checking pile forming quality. The main construction steps of the full casing construction method are similar to those of the slurry wall protection method except that slurry and hole cleaning are not needed. The perpendicularity of the pressed-in sleeve depends on the perpendicularity at the depth of 5-6 m in the initial stage of excavation. Therefore, the verticality of the water level and the vertical should be checked at any time.
For the full casing construction method, the work progress of mud dado construction method is simpler, however, the mud dado construction method lacks the effective protection to the pile foundation hole after the installation casing, when hoisting the steel reinforcement cage, if the steel reinforcement cage does not get into the pile foundation hole perpendicularly, lead to steel reinforcement cage and the downthehole lateral wall conflict collision of pile foundation easily, cause the collapse of pile foundation hole inner wall, and then lead to groundwater to get into the downthehole coagulation that influences the cast-in-place concrete of pile foundation, make the pile foundation insecure.
Therefore, a construction method of the cast-in-situ bored pile is urgently needed, which is favorable for preventing the reinforcement cage from colliding with the inner wall of the pile foundation hole, ensuring the integrity of the inner wall of the pile foundation hole and preventing the influence of groundwater permeating into the pile foundation hole on the quality of the manufactured pile foundation.
Disclosure of Invention
Aiming at the defects in the prior art, the invention aims to provide the construction method of the cast-in-situ bored pile, which is favorable for preventing the reinforcement cage from colliding with the inner wall of the pile foundation hole, ensuring the integrity of the inner wall of the pile foundation hole and preventing the quality of the manufactured pile foundation from being influenced by the permeation of underground water into the pile foundation hole.
The technical purpose of the invention is realized by the following technical scheme:
a construction method of a cast-in-situ bored pile includes:
the method comprises the following steps that firstly, a drilling machine is used for drilling a pile foundation groove, and the perpendicularity of the inner side wall of the pile foundation groove is detected for multiple times during the drilling process, so that the pile foundation groove is prevented from deflecting;
step two, cleaning holes for the first time, and cleaning slag impurities in the pile foundation groove;
step three, installing a sleeve, namely arranging the sleeve in the pile foundation groove and fixing the sleeve and the inner wall of the pile foundation groove through concrete pouring;
step three, mixing the wall protection slurry, and pouring the wall protection slurry into the sleeve;
drilling a pile foundation hole, namely drilling the pile foundation hole through the sleeve by using a drilling machine, so that the wall protection slurry in the sleeve is contacted and condensed with the inner wall of the pile foundation hole along the penetration of a drill bit of the drilling machine, and the wall protection slurry in the sleeve is continuously supplemented until the pile foundation hole is formed;
fifthly, cleaning the hole for the second time, and cleaning mud residue sundries in the pile foundation hole;
hoisting a steel reinforcement cage, vertically placing the steel reinforcement cage into a pile foundation hole by using a hoisting machine, wherein the hoisting machine comprises a base arranged at the opening of the pile foundation hole, a fixed frame fixed on the base, an upper mounting plate fixed at the top of the fixed frame, a fixed cover sleeved at the upper end of the steel reinforcement cage and detachably connected and fixed with the upper end of the steel reinforcement cage, a hoisting device fixed on the upper mounting plate and used for lifting the fixed cover, a protective air bag arranged in the steel reinforcement cage and fixed with the inner top wall of the fixed cover, and an air blowing device arranged on the fixed cover, wherein a plurality of protective bulges are arranged on the outer side wall of the protective air bag, and the protective bulges protrude out of the outer side wall of the steel reinforcement;
step six, dismantling the hoisting machine, separating the fixed cover and the protective air bag from the reinforcement cage respectively, and then removing the hoisting machine;
step seven, pouring concrete, namely, hoisting the guide pipe to the bottom of the pile foundation hole, and then continuously pouring the concrete into the pile foundation hole by using a concrete pump truck until the sleeve is full of the concrete;
and step eight, concrete curing, namely building the pile foundation after the concrete in the pile foundation hole is condensed.
Through adopting the above technical scheme, when the machine of putting that hangs sets up in pile foundation hole department, hang and put the fixed lid of device lift, make and fixed lid decline, thereby make the steel reinforcement cage hang and put to the pile foundation downthehole, before the steel reinforcement cage is hung and is put to the pile foundation downthehole, the aeration device is towards the aeration in the protecting airbag, make the protecting airbag swell, thereby make the protection arch pass the blank between the steel reinforcement on the steel reinforcement cage, the conflict collision of steel reinforcement cage with the downthehole lateral wall of pile foundation has effectively been avoided, the intact of pile foundation hole inner wall has been guaranteed, be favorable to preventing that groundwater infiltration pile foundation is downthehole and influence the quality of making the pile foundation.
The invention is further arranged in that the air blowing device comprises an air blower fixed on the top of the fixed cover and an air inlet pipe, one end of the air inlet pipe is communicated with the air blower, and the other end of the air inlet pipe penetrates through the fixed cover and is communicated with the protective air bag.
Through adopting above-mentioned technical scheme, when the air-blower during operation, the air-blower is blown the air and is passed through the intake pipe and flow in the protection gasbag for the protection gasbag is bloated.
The protective airbag collecting device is further arranged on the fixed cover and comprises a rotating frame fixed at the top of the fixed cover, a rotating roller rotatably connected to the rotating frame, a rotating hand wheel fixed at the end part of the rotating roller, a connecting block arranged at the bottom of the protective airbag, a collecting and releasing rope with one end penetrating through the fixed cover and the other end fixed with the rotating roller and fixed with the connecting block, and a first connecting rope with one end fixed with the inner side wall of the protective airbag and the other end fixed with the connecting block.
Through adopting above-mentioned technical scheme, when demolising the hoist machine, the air-blower stop work, protective airbag leaks gas, and operating personnel rotates the rotation hand wheel for the live-rollers rotates, receive and releases the rope winding on the live-rollers, drives the connecting block and removes towards fixed lid, makes the first connecting rope pulling protective airbag bottom fixed with the connecting block roll in towards fixed lid, thereby makes protective airbag and steel reinforcement cage separation.
The invention is further arranged in such a way that a plurality of connecting rings arranged along the length direction of the retractable ropes are sleeved on the retractable ropes, and second connecting ropes are fixed between the connecting rings and the inner side walls of the protective air bags.
Through adopting above-mentioned technical scheme, along with protective air bag's rolling, the connecting block stimulates a plurality of go-between rings in proper order and shifts up for protective air bag rolls in proper order from bottom to top, thereby makes protective air bag's rolling more have the level, makes protective air bag rolling neat.
The invention is further provided that a first magnet fixed on the inner top wall of the protection bulge and a second magnet fixed on the inner bottom wall of the protection bulge are arranged in the protection bulge.
Through adopting above-mentioned technical scheme, when the protecting air bag was bloated, first magnet and the separation of second magnet, the protruding bloated and pass the steel reinforcement cage of protection, played the effect of fender pile foundation hole inside wall, and when the protecting air bag was lost heart, the protruding shrink of protection for first magnet and second magnet are held, thereby make the protruding shrink of protection complete, make things convenient for the protruding reinforcing bar net that shifts out the steel reinforcement cage when the protecting air bag rolling.
The invention is further set that the hoisting device comprises a mounting frame fixed on the bottom surface of the upper mounting plate, hoisting rollers rotatably connected to the mounting frame, hoisting ropes with one ends fixed to the roller surfaces of the hoisting rollers and the other ends fixed to the upper surfaces of the fixed covers, synchronous bevel gears sleeved on and fixed to the ends of the hoisting rollers, hoisting frames fixed on the bottom surface of the upper mounting plate, worms rotatably connected to the hoisting frames and hoisting motors fixed to the hoisting frames, wherein the number of the hoisting rollers is three, the three hoisting rollers are distributed in a triangular arrangement, and the synchronous bevel gears on the ends of the hoisting rollers are meshed with each other; and a worm wheel is fixed on the end part of the hoisting roller close to the hoisting frame, an output shaft of the hoisting motor penetrates through the hoisting frame and is fixed with the end part of the worm, and the worm is meshed with the worm wheel.
Through adopting above-mentioned technical scheme, when the machine of putting is taken one's place to the hoist, the steel reinforcement cage aims at the sleeve, the machine work of putting is hung this moment, drive the worm and rotate, make and rotate with worm mesh's worm wheel, thereby make one hang and put the roller and rotate, through the rotation of synchronous bevel gear, it puts the roller synchronous rotation to drive other two, thereby make and hang the rope constant speed of putting that puts that the roller is connected with three and wind on hanging and put the rope, thereby keep balance when making fixed lid go up and down, be favorable to preventing that the steel reinforcement cage from hanging to put the downthehole in-process of pile foundation and pile foundation hole inner wall.
The invention is further provided that the fixing cover is also provided with a fixing device, the fixing device comprises a fixing plate fixed on the inner top wall of the fixing cover, a screw rod with one end rotatably connected with the fixing plate and the other end penetrating out of the outer side wall of the fixing cover, a driving hand wheel fixed on one end of the screw rod positioned outside the fixing cover, a driving block slidably connected with the inner top wall of the fixing cover, a clamping block slidably connected with the driving block and a clamping groove arranged on the inner side wall of the fixing cover; the screw rod is rotatably connected with the fixed cover, penetrates through the driving block and is in threaded connection with the driving block; the side wall of the clamping block close to the clamping groove inclines downwards, and the inner side wall of the clamping groove far away from the clamping block inclines upwards.
Through adopting above-mentioned technical scheme, when the steel reinforcement cage upper end was located to fixed lid cover, the roof offsets in steel reinforcement cage upper end and the fixed lid, operating personnel rotated the drive hand wheel this moment, the lead screw has been driven and has been rotated, make the drive block with lead screw threaded connection move towards the tight groove of clamp, move in the tight groove of clamp orientation clamp until pressing from both sides tight piece, and the slope lateral wall that presss from both sides tight piece offsets with the slope inner wall that presss from both sides tight groove, make the tight piece of clamp slide for the drive block up along with the removal of drive block, the steel reinforcement circle that until pressing from both sides tight piece and steel reinforcement cage offsets, thereby make steel reinforcement cage and.
The invention is further provided that the upper surface of the clamping block is provided with an arc-shaped groove, and a rubber pad is fixed in the arc-shaped groove.
Through adopting above-mentioned technical scheme, when pressing from both sides tight piece and steel reinforcement cage's reinforcing bar circle offset, the arc wall on pressing from both sides tight piece and steel reinforcement ring coincide for the rubber pad in the arc wall offsets with the steel reinforcement ring, has effectively prevented to press from both sides the wearing and tearing of tight piece to the steel reinforcement ring.
In conclusion, the beneficial technical effects of the invention are as follows:
1. when the hoisting machine is arranged at the position of the pile foundation hole, the hoisting device lifts the fixing cover to enable the fixing cover to descend, so that the reinforcement cage is hoisted into the pile foundation hole, and before the reinforcement cage is hoisted into the pile foundation hole, the air blowing device blows air towards the inside of the protective air bag to enable the protective air bag to swell, so that the protective protrusion penetrates through a space between the steel bars on the reinforcement cage, the collision between the reinforcement cage and the inner wall of the pile foundation hole is effectively avoided, the integrity of the inner wall of the pile foundation hole is ensured, and the influence on the quality of the manufactured pile foundation due to the infiltration into the pile foundation hole is favorably prevented;
2. when the hoisting machine is dismounted, the blower stops working, the protective air bag leaks air, an operator rotates the rotating hand wheel to rotate the rotating roller, the winding and unwinding ropes are wound on the rotating roller to drive the connecting block to move towards the fixed cover, and the first connecting rope fixed with the connecting block pulls the bottom of the protective air bag to wind towards the inside of the fixed cover, so that the protective air bag is separated from the reinforcement cage;
3. when the hoisting machine is in place, the steel reinforcement cage is aligned to the sleeve, the hoisting machine works at the moment, the worm is driven to rotate, the worm wheel meshed with the worm rotates, one hoisting roller rotates, the other two hoisting rollers are driven to synchronously rotate through rotation of the synchronous bevel gear, and therefore the hoisting ropes connected with the three hoisting rollers are wound on the hoisting ropes at the same speed, the fixed cover is kept balanced during lifting, and the steel reinforcement cage is prevented from being touched with the inner wall of the pile foundation hole in the hoisting process.
Drawings
FIG. 1 is a schematic view of the overall structure of the embodiment;
FIG. 2 is a schematic view of the hoist;
FIG. 3 is a schematic view of the structure of the protective airbag;
fig. 4 is a schematic structural view of the fixing device.
In the figure: 01. a sleeve; 011. a limiting ring; 1. a base; 11. mounting holes; 2. a fixed mount; 3. an upper mounting plate; 4. a fixed cover; 41. a lifting block; 5. a hoisting device; 51. a mounting frame; 52. hoisting the roller; 53. hoisting and releasing the rope; 54. a synchronizing bevel gear; 55. a worm gear; 56. a hoisting frame; 57. a worm; 58. hoisting a motor; 6. a protective air bag; 61. a protective projection; 62. a first magnet; 63. a second magnet; 7. an air blowing device; 71. a blower; 72. an air inlet pipe; 8. a collecting device; 81. a rotating frame; 82. a rotating roller; 83. rotating a hand wheel; 84. connecting blocks; 85. winding and unwinding a rope; 86. a first connecting rope; 87. a connecting ring; 88. a second connecting rope; 9. a fixing device; 91. a fixing plate; 92. a screw rod; 93. driving a hand wheel; 94. a drive block; 95. a clamping block; 951. an arc-shaped slot; 952. a rubber pad; 96. and clamping the groove.
Detailed Description
The present invention will be described in further detail with reference to the accompanying drawings.
A construction method of a cast-in-situ bored pile includes:
the method comprises the following steps that firstly, a drilling machine is used for drilling a pile foundation groove, the opening of the pile foundation groove is circular, the depth of the pile foundation groove is 1 m, the perpendicularity (<% 1) of the inner side wall of the pile foundation groove is detected for multiple times during the process, and the pile foundation groove is prevented from deflecting;
step two, cleaning holes for the first time, and cleaning slag impurities in the pile foundation groove;
step three, installing the sleeve 01;
as shown in fig. 1, the sleeve 01 is tubular, the axis is vertical, the upper end of the sleeve 01 is sleeved and fixed with a limit ring 011, the limit ring 011 is annular, and the upper surface of the limit ring 011 is flush with the upper end face of the sleeve 01. Constructor sets up sleeve 01 in the pile foundation inslot for leave the clearance between 01 lateral wall of sleeve and the pile foundation inslot lateral wall, then pour the concrete between sleeve 01 and pile foundation inslot lateral wall, treat the concrete setting back, sleeve 01 is fixed with the pile foundation groove.
Mixing wall protection slurry, preparing the wall protection slurry by using water and clay (or bentonite) according to a certain proportion, and pouring the wall protection slurry into the sleeve 01 to ensure that the liquid level of the wall protection slurry reaches two thirds of the height of the sleeve 01;
fourthly, drilling a pile foundation hole, namely drilling the pile foundation hole through the sleeve 01 by using a drilling machine, so that the wall protection slurry in the sleeve 01 is in contact with the inner wall of the pile foundation hole and is condensed along the penetration of a drill bit of the drilling machine, continuously supplementing the wall protection slurry in the sleeve 01 during the drilling process, enabling the liquid level interval of the wall protection slurry in the sleeve 01 to be between one third and two thirds of the height of the sleeve 01, and stopping adding the wall protection slurry until the pile foundation hole is formed when the pile foundation hole is to be formed;
fifthly, cleaning the hole for the second time, and cleaning mud residue sundries in the pile foundation hole;
hoisting the reinforcement cage, and vertically entering the pile foundation hole by using a hoisting machine;
as shown in fig. 1, the lifting machine includes a base 1, a fixing frame 2, an upper mounting plate 3, a fixing cover 4, a lifting device 5, a protection airbag 6, an air blowing device 7, a collecting device 8, and a fixing device 9. The base 1 is a rectangular plate-shaped structure, the bottom surface of the base abuts against the ground at the position of the pile foundation hole in an attached mode, and the upper surface of the base 1 is provided with a mounting hole 11. The cross-section of mounting hole 11 is circular, and when base 1 installed in place, 11 inside walls of mounting hole of base 1 and the spacing collar 011 lateral wall of sleeve 01 pasted and offset. The fixing frame 2 is a rectangular plate-shaped structure, the length direction of the fixing frame is vertical, and the bottom surface of the lower end of the fixing frame is fixed with the upper surface of the base 1. The two fixing frames 2 are arranged on the two sides of the mounting hole 11, and the side walls, close to each other, of the two fixing frames 2 are tangent to the opening of the mounting hole 11. The upper mounting plate 3 is of a rectangular plate-shaped structure, the larger surface of the upper mounting plate is horizontal, the upper surface of the upper mounting plate 3 is flush with the upper end of the fixing frame 2, and the two ends of the upper mounting plate 3 are fixed with the side walls of the two fixing plates 91 which are close to each other respectively. The fixed cover 4 is a circular cover-shaped structure, the opening of the fixed cover is downward arranged and sleeved on the upper end of the steel reinforcement cage, and the outer side wall of the fixed cover 4 is fixed with a lifting block 41. The lifting block 41 is rectangular block-shaped, one side wall of the lifting block is attached to and fixed with the outer side wall of the fixed cover 4, the other side wall of the lifting block is in sliding connection with the side wall of the fixed frame 2 close to the other fixed frame 2, and the sliding direction of the lifting block 41 is vertical, so that the fixed cover 4 vertically slides along the fixed frame 2.
As shown in fig. 1 and 2, the hoist 5 includes a mounting frame 51, a hoist roller 52, a hoist rope 53, a synchro bevel gear 54, a worm wheel 55, a hoist frame 56, a worm 57, and a hoist motor 58. The mounting bracket 51 is a strip-shaped structure with a V-shaped horizontal section, the length direction of the mounting bracket is vertical, and the upper end of the mounting bracket is fixed with the bottom surface of the upper mounting plate 3. The contained angle between the mounting bracket 51 lateral wall is 60 degrees, and mounting bracket 51 is equipped with threely altogether, and three mounting bracket 51 is three points punishment and distributes on last mounting bracket 3 bottom surface, and three mounting bracket 51 distance each other equals for the lateral wall that is close to each other between the adjacent mounting bracket 51 is parallel. The hanging roller 52 is in a shape of a round roller, the axis of the hanging roller is horizontal, and two ends of the hanging roller 52 are respectively and rotatably connected with the side walls, close to each other, of the mounting frame 51. The number of the lifting and placing rollers 52 is three, and the three lifting and placing rollers 52 are respectively arranged among the three mounting frames 51, so that the axes of the three lifting and placing rollers 52 are intersected to form an equilateral triangle. The hoisting ropes 53 are high-strength ropes, one end of each hoisting rope 53 is fixed to the surface of the corresponding hoisting roller 52, the other end of each hoisting rope extends onto the corresponding fixed cover 4 and is fixed to the upper surface of the corresponding fixed cover 4, three hoisting ropes 53 are arranged, the three hoisting ropes 53 are respectively connected with the three hoisting rollers 52, and connecting lines between the three hoisting ropes 53 and the connecting positions of the upper surfaces of the fixed covers 4 form an equilateral triangle. The synchronous bevel gears 54 are sleeved on the end portions of the hanging rollers 52 and fixed with the hanging rollers, six synchronous bevel gears 54 are arranged, the six synchronous bevel gears 54 are respectively arranged at two ends of the three hanging rollers 52, and the two synchronous bevel gears 54 which are close to each other are meshed with each other. In addition, one end of one of the three hanging and placing rollers 52 passes through the mounting frame 51, and a worm wheel 55 is sleeved and fixed on one end of the hanging and placing roller 52 which passes through the mounting frame 51. The hanging frame 56 is a plate-shaped structure with an inverted U-shaped vertical cross section, two ends of the hanging frame are arranged vertically downwards, and the upper surface of the hanging frame is fixed with the bottom surface of the upper mounting plate 3. The worm 57 is disposed in the hanging frame 56, the axis thereof is horizontal, and both ends thereof are respectively rotatably connected with the inner side walls of both sides of the hanging frame 56. The hanging motor 58 is a high torque servo motor, and is fixed on the outer side wall of one side of the hanging frame 56, and the output shaft of the hanging motor 58 passes through the hanging frame 56 and is fixed with the end of the worm 57.
As shown in fig. 1 and 3, the protective airbag 6 is in a circular tube shape, the tube wall of the protective airbag is hollow and made of wear-resistant rubber materials, the protective airbag 6 is vertically arranged in the reinforcement cage, and the upper end of the protective airbag 6 contracts towards the axis of the protective airbag and is fixed with the inner top wall of the fixed cover 4. Be equipped with protection arch 61 on the lateral wall of protective airbag 6, protection arch 61 is rectangular block shape, its inside cavity and with protective airbag 6 lateral wall integrated into one piece, and protection arch 61 communicates in with protective airbag 6. One end of the protection bulge 61 far away from the protective airbag 6 horizontally penetrates through a space formed by the reinforcing steel bars and the reinforcing steel rings on the reinforcement cage, and a first magnet 62 and a second magnet 63 are arranged in the protection bulge 61. The first magnet 62 and the second magnet 63 are sheet magnets, and the first magnet 62 and the second magnet 63 attract each other. The first magnet 62 is fixed on the inner top wall of the protection protrusion 61, and the second magnet 63 is fixed on the inner bottom wall of the protection protrusion 61, when the protection protrusion 61 is empty, the first magnet 62 and the second magnet 63 attract each other, so that the protection protrusion 61 is completely contracted. In addition, the protection protrusion 61 is provided in plurality, and the outer side wall of the protection airbag 6 is uniformly distributed with the plurality of protection protrusions 61. As shown in fig. 4, the air blowing device 7 includes an air blower 71 and an air inlet pipe 72, the air blower 71 is fixed on the upper surface of the fixing cover 4, and an air outlet is formed on the air blower for fixing air flowing out from the air outlet. The air inlet pipe 72 is a hose, one end of the air inlet pipe is fixed and communicated with the air outlet of the blower 71, the other end of the air inlet pipe passes through the fixing cover 4 and is fixed with the upper end surface of the protective airbag 6, and the air inlet pipe 72 is communicated with the interior of the protective airbag 6. When the reinforcement cage and the fixing cover 4 are installed in place, the blower 71 works to blow a large amount of air into the protective airbag 6, so that the protective airbag 6 is inflated, and the protective protrusions 61 on the protective airbag 6 penetrate out of the grids on the reinforcement cage.
As shown in fig. 1 and 3, the takeup device 8 includes a rotating frame 81, a rotating roller 82, a rotating hand wheel 83, a connecting block 84, a takeup and retraction rope 85, a first connecting rope 86, a connecting ring 87, and a second connecting rope 88. The rotating frames 81 are rectangular plate-shaped structures, are vertically arranged on the fixed cover 4 and are fixed with the upper surface of the fixed cover 4, two rotating frames 81 are arranged, and the two rotating frames 81 are arranged in parallel. The rotating roller 82 is in a shape of a round roller, the axis of the rotating roller is horizontal, two ends of the rotating roller 82 are respectively connected with the side walls, close to the rotating frame 81, in a rotating mode, and one end of the rotating roller 82 penetrates through the rotating frame 81. The rotating hand wheel 83 is fixed at one end of the rotating roller 82 penetrating through the rotating frame 81, and the rotating axis of the rotating hand wheel is overlapped with the axis of the rotating roller 82. The connecting block 84 is a circular block and is arranged at the bottom of the protective air bag 6, and the axis of the connecting block 84 coincides with the axis of the protective air bag 6. One end of the winding and unwinding rope 85 is fixed with the roller surface of the rotating roller 82, and the other end passes through the fixed cover 4 and is fixed with the middle part of the upper surface of the connecting block 84. First connecting rope 86 one end is fixed with connecting block 84 lateral wall, and the other end is fixed with 6 inside walls of air bag, and the length direction level of first connecting rope 86, and first connecting rope 86 is equipped with four altogether, and four first connecting ropes 86 encircle the axis evenly distributed of connecting block 84. The connecting rings 87 are annular and are sleeved on the retractable rope 85, a plurality of connecting rings 87 are provided, and the plurality of connecting rings 87 are arranged along the length direction of the retractable rope 85. One end of each second connecting rope 88 is fixed with the outer side wall of the connecting ring 87, the other end of each second connecting rope 88 is fixed with the inner side wall of the protective air bag 6, four second connecting ropes 88 are arranged, and the four second connecting ropes 88 are uniformly distributed around the axis of the connecting ring 87.
As shown in fig. 1 and 4, the fixing device 9 includes a fixing plate 91, a screw 92, a driving hand wheel 93, a driving block 94, a clamping block 95, and a clamping groove 96. The fixing plate 91 is a rectangular plate-shaped structure, and is vertically disposed in the fixing cover 4, and the upper surface of the fixing plate 91 is fixed to the inner top wall of the fixing cover 4. The axis of the screw 92 is horizontal, one end of the screw passes through the inner side wall of the fixed cover 4 and is rotatably connected with the side wall of the fixed plate 91 far away from the axis of the fixed cover 4, the other end of the screw passes through the outer side wall of the fixed cover 4, and the screw 92 is rotatably connected with the fixed cover 4. The driving handwheel 93 is arranged outside the fixed cover 4, and is fixed with one end of the screw rod 92 penetrating through the fixed cover 4, and the rotation axis of the driving handwheel 93 is overlapped with the axis of the screw rod 92. The driving block 94 is rectangular block-shaped and is disposed between the side wall of the fixing plate 91 far from the axis of the fixing cover 4 and the inner side wall of the fixing cover 4, the upper surface of the driving block 94 is connected with the inner top wall of the fixing cover 4 in a sliding manner, the sliding direction of the driving block 94 is perpendicular to the side wall of the fixing plate 91 far from the axis of the fixing cover 4, and furthermore, the screw rod 92 passes through the driving block 94 and is parallel to and in threaded connection with the side wall of the fixing plate 91. The clamping block 95 is rectangular block-shaped, the length direction of the clamping block is horizontal, one end of the clamping block 95 is connected with the side wall of the driving block 94 far away from the fixing plate 91 in a sliding mode, the other end of the clamping block faces the inner side wall of the fixing cover 4, and the sliding direction of the clamping block 95 is vertical. The clamping groove 96 is opened at the position of the inner side wall of the fixed cover 4 close to the clamping block 95, the opening of the clamping groove is rectangular, the inner side wall of the clamping block 95 far away from the driving block 94 inclines upwards, and in addition, the side wall of one end of the clamping block 95 far away from the driving block 94 inclines downwards and extends into the clamping groove 96 to be abutted against the inclined inner side wall of the clamping groove 96. The arc groove 951 has been seted up to the clamping block 95 upper surface, and the vertical cross-section of arc groove 951 is the arc, and is fixed with the rubber pad 952 in the arc groove 951. The rubber pad 952 is arc-shaped strip, the cross section of which is arc-shaped, and the larger arc-shaped surface of the rubber pad 952 is attached and fixed with the inner wall of the arc-shaped groove 951. The fixing devices 9 are provided with four groups in total, and the four groups of fixing devices 9 are uniformly distributed around the axis of the fixing cover 4. When the steel reinforcement cage upper end was located to fixed lid 4 cover, the steel reinforcement cage upper end offsets with roof in the fixed lid 4, at this moment, constructor rotates drive hand wheel 93, make lead screw 92 rotate, it moves to have driven the drive block 94 towards pressing from both sides tight groove 96, make and press from both sides tight piece 95 and move towards pressing from both sides tight groove 96, make the slope lateral wall that presss from both sides tight piece 95 offset with the slope inside wall that presss from both sides in the tight groove 96, the drive block 94 continues to move, make and press from both sides tight piece 95 and slide up, arc groove 951 and the reinforcing bar circle bottom of steel reinforcement cage upper end offset on pressing from both sides tight piece 95, thereby make the steel reinforcement cage fixed with.
When hoisting the steel reinforcement cage, the hoisting machine sets up in pile foundation hole department for mounting hole 11 cover on the base 1 locates on the spacing collar 011 on the sleeve 01 and offsets with it, then hoists the work of motor 58, drives worm 57 and worm wheel 55 and rotates, makes three hoist and put roller 52 synchronous rotations, thereby makes three hoist and put rope 53 put fixed lid 4 in step down, makes the steel reinforcement cage fixed with fixed lid 4 pass through sleeve 01 and move towards the pile foundation hole, gets into the pile foundation hole completely until the steel reinforcement cage.
Step six, dismantling the hoisting machine;
after the reinforcement cage is in place, the blower 71 stops working, so that air in the protective air bag 6 is gradually lost, at the moment, a constructor rotates the rotating hand wheel 83 to drive the rotating roller 82 to rotate, the winding and unwinding rope 85 is gradually wound on the rotating roller, the connecting block 84 and the connecting ring 87 are pulled to move upwards, the protective air bag 6 is gradually wound and unwound in the fixed cover 4, then the constructor rotates the driving hand wheel 93 to enable the clamping block 95 to be separated from a reinforcement ring on the reinforcement cage under the action of self gravity, the fixation between the fixed cover 4 and the reinforcement cage is released, then the operator takes off the fixed cover 4 to enable the reinforcement cage to be separated from the hoisting machine, and finally the constructor removes the hoisting machine.
Step seven, pouring concrete, namely, hoisting the guide pipe to the bottom of the pile foundation hole, and then continuously pouring the concrete into the pile foundation hole by using a concrete pump truck until the sleeve 01 is full of the concrete;
and step eight, concrete curing, namely building the pile foundation after the concrete in the pile foundation hole is condensed.
The working principle of the embodiment is as follows: at the steel reinforcement cage towards the downthehole in-process of hanging of pile foundation, the blank on the steel reinforcement cage is worn out to protruding 61 of protection on the protective airbag 6, has effectively avoided the conflict collision of steel reinforcement cage and the downthehole lateral wall of pile foundation, has guaranteed the intact of pile foundation downthehole wall, is favorable to preventing that groundwater infiltration pile foundation is downthehole and influence the quality of making the pile foundation.
The above description is only a preferred embodiment of the present invention, and the protection scope of the present invention is not limited to the above embodiments, and all technical solutions belonging to the idea of the present invention belong to the protection scope of the present invention. It should be noted that modifications and embellishments within the scope of the invention may occur to those skilled in the art without departing from the principle of the invention, and are considered to be within the scope of the invention.
Claims (7)
1. A construction method of a cast-in-situ bored pile is characterized by comprising the following steps: the method comprises the following steps:
the method comprises the following steps that firstly, a drilling machine is used for drilling a pile foundation groove, and the perpendicularity of the inner side wall of the pile foundation groove is detected for multiple times during the drilling process, so that the pile foundation groove is prevented from deflecting;
step two, cleaning holes for the first time, and cleaning slag impurities in the pile foundation groove;
step three, installing a sleeve (01), arranging the sleeve (01) in the pile foundation groove, and pouring and fixing the sleeve (01) and the inner wall of the pile foundation groove through concrete;
step three, mixing the wall protection slurry, and pouring the wall protection slurry into the sleeve (01);
drilling a pile foundation hole, namely drilling the pile foundation hole through the sleeve (01) by using a drilling machine, so that the wall protection slurry in the sleeve (01) is contacted and condensed with the inner wall of the pile foundation hole along the penetration of a drill bit of the drilling machine, and the wall protection slurry in the sleeve (01) is continuously supplemented until the pile foundation hole is formed;
fifthly, cleaning the hole for the second time, and cleaning mud residue sundries in the pile foundation hole;
hoisting a steel reinforcement cage, vertically placing the steel reinforcement cage into a pile foundation hole by using a hoisting machine, wherein the hoisting machine comprises a base (1) arranged at the opening of the pile foundation hole, a fixed frame (2) fixed on the base (1), an upper mounting plate (3) fixed at the top of the fixed frame (2), a fixed cover (4) sleeved at the upper end of the steel reinforcement cage and detachably connected and fixed with the upper end of the steel reinforcement cage, a hoisting device (5) fixed on the upper mounting plate (3) and used for lifting the fixed cover (4), a protective air bag (6) arranged in the steel reinforcement cage and fixed with the inner top wall of the fixed cover (4), and an air blowing device (7) arranged on the fixed cover (4), wherein a plurality of protective bulges (61) are arranged on the outer side wall of the protective air bag (6), and the protective bulges (61) protrude out of the outer side wall of;
step six, dismantling the hoisting machine, separating the fixed cover (4) and the protective air bag (6) from a reinforcement cage respectively, and then removing the hoisting machine;
step seven, pouring concrete, namely, hoisting the guide pipe to the bottom of the pile foundation hole, and then continuously pouring the concrete into the pile foundation hole by using a concrete pump truck until the sleeve (01) is full of the concrete;
step eight, concrete curing, namely building the pile foundation after concrete in the pile foundation hole is condensed; the air blowing device (7) comprises an air blower (71) fixed on the top of the fixed cover (4) and an air inlet pipe (72) with one end communicated with the air blower (71) and the other end penetrating through the fixed cover (4) and communicated with the protective air bag (6).
2. The method for constructing a bored pile according to claim 1, wherein: still be equipped with collection device (8) that are used for collecting protective air bag (6) on fixed lid (4), collection device (8) including being fixed in rotating turret (81), the rotation at fixed lid (4) top connect in rotating turret (81) go up rotating roller (82), with rotating roller (82) end fixing's rotation hand wheel (83), set up in connecting block (84), the one end of protective air bag (6) bottom with pass fixed lid (4) and with the fixed other end of rotating roller (82) with rope (85) and one end are put in the fixed receipts of connecting block (84) with the fixed other end of protective air bag (6) inside wall with first connecting rope (86) that connecting block (84) are fixed.
3. The method for constructing a bored pile according to claim 2, wherein: the folding and unfolding rope (85) is sleeved with a plurality of connecting rings (87) which are arranged along the length direction of the folding and unfolding rope (85), and a second connecting rope (88) is fixed between the connecting rings (87) and the inner side wall of the protective air bag (6).
4. The method for constructing a bored pile according to claim 3, wherein: the protection protrusion (61) is internally provided with a first magnet (62) fixed on the inner top wall of the protection protrusion (61) and a second magnet (63) fixed on the inner bottom wall of the protection protrusion (61).
5. The method for constructing a bored pile according to claim 1, wherein: the lifting device (5) comprises a mounting frame (51) fixed on the bottom surface of the upper mounting plate (3), lifting rollers (52) rotatably connected to the mounting frame (51), lifting ropes (53) with one end fixed to the roller surface of the lifting rollers (52) and the other end fixed to the upper surface of the fixed cover (4), synchronous bevel gears (54) sleeved on and fixed to the ends of the lifting rollers (52), lifting frames (56) fixed to the bottom surface of the upper mounting plate (3), worms (57) rotatably connected to the lifting frames (56) and lifting motors (58) fixed to the lifting frames (56), wherein the number of the lifting rollers (52) is three, the three lifting rollers (52) are distributed in a triangular arrangement, and the synchronous bevel gears (54) on the ends of the lifting rollers (52) are meshed with one another; a worm wheel (55) is fixed on the end part of the hoisting roller (52) close to the hoisting frame (56), the output shaft of the hoisting motor (58) penetrates through the hoisting frame (56) and is fixed with the end part of the worm (57), and the worm (57) is meshed with the worm wheel (55).
6. The method for constructing a bored pile according to claim 1, wherein: the fixing cover (4) is further provided with a fixing device (9), the fixing device (9) comprises a fixing plate (91) fixed on the inner top wall of the fixing cover (4), a screw rod (92) with one end rotatably connected with the fixing plate (91) and the other end penetrating out of the outer side wall of the fixing cover (4), a driving hand wheel (93) fixed on one end of the screw rod (92) positioned outside the fixing cover (4), a driving block (94) slidably connected with the inner top wall of the fixing cover (4), a clamping block (95) slidably connected with the driving block (94) and a clamping groove (96) formed in the inner side wall of the fixing cover (4); the screw rod (92) is rotatably connected with the fixed cover (4), and the screw rod (92) penetrates through the driving block (94) and is in threaded connection with the driving block; the side wall of the clamping block (95) close to the clamping groove (96) is inclined downwards, and the inner side wall of the clamping groove (96) far away from the clamping block (95) is inclined upwards.
7. The method for constructing a bored pile according to claim 6, wherein: an arc-shaped groove (951) is formed in the upper surface of the clamping block (95), and a rubber pad (952) is fixed in the arc-shaped groove (951).
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| CN201910554442.3A CN110258540B (en) | 2019-06-25 | 2019-06-25 | Construction method of cast-in-situ bored pile |
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| CN112360337B (en) * | 2020-11-04 | 2023-06-20 | 北京三一智造科技有限公司 | Pile foundation construction method |
| CN112576210B (en) * | 2020-12-15 | 2022-11-04 | 中铁北京工程局集团有限公司 | Clear hole device of drilling bored concrete pile |
| CN115928742B (en) * | 2023-02-01 | 2023-08-22 | 江苏省中成建设工程总公司 | Hoisting device for preventing reinforcement cage from deforming for slurry wall-protecting bored pile construction |
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| CN104120716A (en) * | 2013-04-28 | 2014-10-29 | 杨哲 | Slurry wall protection construction method for bored pile |
| CN104532843A (en) * | 2014-12-26 | 2015-04-22 | 中国一冶集团有限公司 | Method for positioning and straightening steel stand column of stand column pile |
| CN104831708A (en) * | 2015-03-20 | 2015-08-12 | 深圳市工勘岩土集团有限公司 | Foundation excavation retaining and protecting cast-in-situ bored pile construction method and equipment thereof |
| CN109837891A (en) * | 2019-03-25 | 2019-06-04 | 闫相明 | A kind of tubular pole filling core construction |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104120716A (en) * | 2013-04-28 | 2014-10-29 | 杨哲 | Slurry wall protection construction method for bored pile |
| CN104532843A (en) * | 2014-12-26 | 2015-04-22 | 中国一冶集团有限公司 | Method for positioning and straightening steel stand column of stand column pile |
| CN104831708A (en) * | 2015-03-20 | 2015-08-12 | 深圳市工勘岩土集团有限公司 | Foundation excavation retaining and protecting cast-in-situ bored pile construction method and equipment thereof |
| CN109837891A (en) * | 2019-03-25 | 2019-06-04 | 闫相明 | A kind of tubular pole filling core construction |
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Effective date of registration: 20210918 Address after: 238000 shop 307, feicui Huating district a, intersection of Yinping road and Guishan Road, Chaohu City, Hefei City, Anhui Province Patentee after: Anhui Qiushi Engineering Construction Consulting Co.,Ltd. Address before: 238000 shop 117, 217, 304-04, section C2, Jiangnan Fengqing street, TianChao square, south side of Changjiang Road, Chaohu City, Hefei City, Anhui Province Patentee before: Anhui Wanhong Construction Engineering Co.,Ltd. |
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