CN113266013B

CN113266013B - Pile end pressure grouting construction method for prestressed concrete pipe pile

Info

Publication number: CN113266013B
Application number: CN202110432035.2A
Authority: CN
Inventors: 李亚民; 隋艳丽; 黄宁伟
Original assignee: Individual
Current assignee: Individual
Priority date: 2021-04-21
Filing date: 2021-04-21
Publication date: 2022-10-04
Anticipated expiration: 2041-04-21
Also published as: CN113266013A

Abstract

The invention provides a pile end pressure grouting construction method of a prestressed concrete pipe pile, which is used for achieving the purposes of fully exerting the bearing capacity of a soil body at the end part by performing high-pressure cement grouting on the pile end part in the pipe pile construction process, further improving the bearing capacity of the pipe pile, reducing the using amount of the pile and reducing the construction cost; the method comprises the following steps: welding a slip casting device on the end part of the lower section of the tubular pile; sequentially hoisting a lower section of tubular pile and an upper section of tubular pile, and welding the connecting parts of the lower section of tubular pile and the upper section of tubular pile into a whole to form a main tubular pile; carrying out static pressure pile sinking on the upper end of the welded main pipe pile to a designed elevation by using a static pressure pile machine; and (4) removing the static pile machine, and performing high-pressure grouting on the lower end of the main pipe pile by using the grouting pipe.

Description

Pile end pressure grouting construction method for prestressed concrete pipe pile

Technical Field

The invention relates to the technical field of pipe pile construction methods, in particular to a prestressed concrete pipe pile end pressure grouting construction method.

Background

According to the development requirement of building foundation engineering, the requirement of a single pile bearing capacity of a building on a pile foundation is higher and higher, and the application of the prestressed concrete pipe in the pile foundation engineering is more and more common. The high-strength prestressed concrete pipe pile has reliable guarantee of product quality due to industrial production, and is widely applied to basic engineering.

However, the post-grouting technology cannot be applied to soft soil layers, such as silty soil, gravelly soil, silty clay and other geological conditions with poor soil quality, is introduced into the construction of the prestressed concrete tubular pile to solve the problems, and can greatly improve the resistance of the pile bottom and the pile side, reduce the pile length and reduce the construction cost of pile foundation engineering;

however, in the pipe pile construction process, the blockage phenomenon of the grouting device is easily caused, the grouting failure is caused, the bearing capacity of the pile foundation is greatly influenced, the pile foundation reinforcement must be locally carried out once the grouting failure phenomenon occurs, and otherwise, the building structure safety is greatly influenced.

Disclosure of Invention

The invention provides a pile end pressure grouting construction method of a prestressed concrete pipe pile, which is used for achieving the purposes of fully exerting the bearing capacity of a soil body at the end part by performing high-pressure cement grouting on the pile end part in the pipe pile construction process, further improving the bearing capacity of the pipe pile, reducing the using amount of the pile and reducing the construction cost.

The invention provides a pile end pressure grouting construction method for a prestressed concrete pipe pile, which comprises the following steps of:

welding a slip casting device on the end part of the lower section of the tubular pile;

sequentially hoisting a lower section of tubular pile and an upper section of tubular pile, and welding the connecting parts of the lower section of tubular pile and the upper section of tubular pile into a whole to form a main tubular pile;

carrying out static pressure pile sinking on the upper end of the welded main pipe pile to a designed elevation by using a static pressure pile machine;

and (4) removing the static pile machine, and performing high-pressure grouting on the lower end of the main pipe pile by using the grouting pipe.

Preferably, hoist lower tube stake and upper tube stake in proper order to as an organic whole the connecting portion welding of lower tube stake and upper tube stake forms main tubular pile, still includes:

hoisting a lower-section pipe pile, hoisting the lower-section pipe pile to a construction section, and hoisting the lower-section pipe pile to an upright state;

correcting the lower-section pipe pile, and performing verticality correction on the vertical lower-section pipe pile;

and (3) statically pressing the lower-section pipe pile, enabling the calibrated lower-section pipe pile to face a construction point, and statically pressing the lower-section pipe pile to the underground by using a static pile machine, wherein the static pressure distance is 0.3-0.5 m away from the ground.

hoisting an upper tubular pile, hoisting the upper tubular pile to the upper part of a lower tubular pile, and adjusting the upper tubular pile to be in an upright state;

and welding the upper-section tubular pile and the lower-section tubular pile, and performing static pressure pile sinking on the welded upper-section tubular pile to a designed elevation by using a static pressure pile machine.

Preferably, welding the slip casting machine on the pile end of the lower section of tubular pile further comprises:

a grouting pipe is connected above the grouting device;

sequentially enabling the grouting pipes to penetrate through the lower pipe pile section to the upper pipe pile section from bottom to top;

mounting a grouting joint at one end of the grouting pipe far away from the grouting device;

the grouting joint is connected with a slurry outlet of the high-pressure pump;

and starting a valve of the grout outlet, and grouting the end part of the main pipe pile through the grouting pipe and the grouting device.

Preferably, the slurry outlet is provided with a grouting high-pressure pump;

pumping cement into a cement pipe by using a high-pressure pump;

and grouting the end part of the main pipe pile by using the grouting device, and draining the cement slurry grouted by the grouting device into the soil body at the end part of the main pipe pile through the slurry outlet hole.

Preferably, welding upper segment tubular pile and lower section tubular pile, utilize static pile machine will weld the upper segment tubular pile that is good and carry out the static pressure pile sinking to design elevation, still include:

acquiring the condition of a geological distribution layer of a construction section;

matching the output pressure of the static pile machine according to the geological condition of the construction section;

adjusting the output pressure corresponding to the high-pressure pump according to the matching result;

and adjusting the grouting amount of the grouting pipe according to the output pressure of the high-pressure pump.

Preferably, the matching is performed according to the geological condition of the construction section and the output pressure of the static pile press, and the method further comprises the following steps:

the soil layer characteristics in the geological distribution layer are judged according to the pile pressing force of the static pile pressing machine,

and determining grouting pressure and grouting amount according to the characteristics of the geological soil layer, and if the soil quality of the geological soil layer is loose, determining the grouting amount according to the looseness.

Preferably, the soil layer characteristics in the geological distribution layer are judged according to the pile pressing force of the static pile pressing machine,

judging soil property strength according to soil layer characteristics;

if the output pressure value of the static pressure pile machine is lower than the preset value, the geological characteristic of a bearing stratum of static pressure construction is poor, namely the soil layer strength of soil is low;

if the output pressure of the static pressure pile machine is higher than the preset value, the geological property of a bearing stratum of static pressure construction is strong, namely the soil layer strength of soil is high.

The invention has the following beneficial effects:

in the invention, the inner diameter of the grouting pipe is 10-25mm, the outer diameter of the grouting pipe is 20-30mm, the grouting pipe is a steel pipe, and the height of the steel pipe is 100-200mm lower than the length of the main pipe pile. The method comprises the following steps of carrying out static pressure on a lower-section pipe pile underground by using a static pressure pile machine, wherein the distance between the lower-section pipe pile and the ground is the distance between the upper top end of the lower-section pipe pile and the ground, and the distance is preferably 0.5 m;

welding and calibrating the upper-section tubular pile on the top end of the lower-section tubular pile extending out of the ground to form a main tubular pile, and continuously performing static pressure pile sinking on the main tubular pile by using a static pressure pile machine to enable the top end of the main tubular pile to reach a designed elevation, so that the static pressure pile sinking work is completed;

grouting the lower bottom surface of the main pipe pile by using the grouting device special for the pipe pile; the grouting device can enable the arranged grout outlet to be positioned in the horizontal direction of the pile tip, so that the grout outlet for injecting the grouting device can be perpendicular to the main pipe pile, and the purpose of grouting from the horizontal direction to the pile end soil layer of the main pipe pile is further achieved (as shown in figures 1 a-4), and therefore the problem that the grout outlet is blocked when the pipe pile is hammered to form a pile (static pressure pile forming), the pressure grouting fails is avoided, and the grouting is 100% successful is achieved.

According to the invention, pile end grouting construction can be carried out, so that the technical problem that the conventional grouting device is easy to block is solved, and the aim of ensuring one-time successful pile end grouting is fulfilled; furthermore, in the process of constructing the prestressed concrete tubular pile, the construction method provided by the invention can save the material consumption of the tubular pile and reduce the cost of the pile foundation, and the special pile end pressure grouting device is adopted to avoid the problem that a grout outlet cannot be opened when the pile tip meets hard objects or rocks, ensure the success of grouting by 100 percent, expand the application range of the prestressed concrete tubular pile, ensure that the prestressed concrete tubular pile can replace a large-diameter concrete cast-in-place pile, be used for high-rise buildings with higher requirements on the bearing capacity of the pile foundation, accord with the national building development direction of energy conservation and consumption reduction, and have wide popularization and application prospects.

Additional features and advantages of the invention will be set forth in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. The objectives and other advantages of the invention will be realized and attained by the structure particularly pointed out in the written description and drawings.

The technical solution of the present invention is further described in detail by the accompanying drawings and embodiments.

Drawings

The accompanying drawings, which are included to provide a further understanding of the invention and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the description serve to explain the principles of the invention and not to limit the invention. In the drawings:

FIG. 1a is a construction flow chart of the present invention;

FIG. 1b is a flow chart of another embodiment of the present invention;

FIG. 2 is a schematic view of the construction of a lower section pipe pile according to the present invention;

FIG. 3 is a schematic view of the construction of the upper section of tubular pile of the present invention;

FIG. 4 is a schematic structural view of a verticality adjusting mechanism of the present invention;

FIG. 5 is a schematic perspective view of the perpendicularity adjusting mechanism of the present invention;

FIG. 6 is a schematic front view of the welding initiation mechanism of the present invention;

FIG. 7 is a perspective view of the weld activation mechanism of the present invention;

FIG. 8 is a rear view of the welding initiation mechanism of the present invention;

FIG. 9 is a schematic view of the grouting amount adjusting mechanism according to the present invention;

FIG. 10 is a schematic view of the positive and negative contact pads of the present invention;

FIG. 11 is a schematic view of a storage bin according to the present invention;

fig. 12 is a schematic diagram of a limiting plate structure according to the present invention;

FIG. 13 is a schematic view of the construction of the inventive slurry injector;

wherein: 1-connecting joint, 2-grouting pipe, 3-welding plate, 4-protecting support, 5-grout outlet, 6-protecting cylinder, 7-steel pile tip, 8-grout spraying hole and 9-holding cavity,

10-a flange plate, 11-a first fixing plate, 12-a fixing bolt, 13-a first adjusting rod, 14-a second fixing plate, 15-a hole, 16-an adjusting block, 17-a first through hole, 18-a V-shaped clamping groove and 19-a main pipe pile;

20-housing, 21-first gear, 22-first rotating disk, 23-trigger bar, 24-right angle table, 25-first connecting rod, 26-hinge shaft, 27-first rotating shaft, 28-second gear, 29-second connecting rod, 30-third gear, 31-fixed frame, 32-support rod, 33-U-shaped frame, 34-trigger surface, 35-third connecting rod, 36-fourth connecting rod, 37-third rotating shaft,

38-a first limit column, 39-an adjusting groove, 40-a V-shaped rod, 41-a connecting frame, 42-a second limit column, 43-a supporting rod, 44-a rotating wheel, 45-a vertical rod, 46-a limiting block, 47-a second adjusting rod, 48-a fourth rotating shaft, 49-a movable groove, 50-a second rotating disc, 51-an upper section of tubular pile, 52-a grouting device, 53-a lower section of tubular pile, 54-a pile foundation,

55-a positive contact piece, 56-a negative contact piece, 57-a fifth rotating shaft, 58-a fourth gear, 59-a sixth rotating shaft, 60-a fifth connecting rod, 61-a plunger, 62-a first pressurizing pipeline, 63-a material port, 64-a material storage box, 65-a material discharge pipeline, 66-a second pressurizing pipeline, 67-a driving output shaft, 68-a limiting plate and 69-a spring,

a-the distance between the lower section of pipe pile and the ground, and B-the designed elevation.

Detailed Description

The preferred embodiments of the present invention will be described in conjunction with the accompanying drawings, and it will be understood that they are described herein for the purpose of illustration and explanation and not limitation.

According to fig. 1a to 13, an embodiment of the present invention provides a method for performing pile end pressure grouting construction on a prestressed concrete pipe pile, including the following steps:

welding the grouting device 52 on the end part of the lower section of the tubular pile 53;

sequentially hoisting a lower tubular pile 53 and an upper tubular pile 51, and welding the connecting parts of the lower tubular pile 53 and the upper tubular pile 51 into a whole to form a main tubular pile 19;

carrying out static pressure pile sinking on the upper end of the welded main pipe pile 19 to reach a designed elevation B by using a static pressure pile machine;

the static pile machine is removed and the lower end of the main pipe pile 19 is subjected to high-pressure grouting by the grouting pipe 2.

Wherein, hoist lower tube stake 53 and upper tube stake 51 in proper order to as an organic whole with lower tube stake 53 and upper tube stake 51's connecting portion welding, form main tubular pile 19, still include:

hoisting the lower-section pipe pile 53, hoisting the lower-section pipe pile 53 to a construction section, and hoisting the lower-section pipe pile 53 to an upright state;

correcting the lower pipe-section pile 53, and performing verticality correction on the vertical lower pipe-section pile 53;

and (3) statically pressing the lower-section tubular pile 53, enabling the calibrated lower-section tubular pile 53 to face a construction point, and statically pressing the lower-section tubular pile 53 underground by using a static pile machine, wherein the static pressure distance is 0.3-0.5 m away from the ground.

Hoisting the upper tubular pile 51, hoisting the upper tubular pile 51 to the upper part of the lower tubular pile 53, and adjusting the upper tubular pile 51 to be in an upright state;

and welding the upper-section tubular pile 51 and the lower-section tubular pile 53, and performing static pressure pile sinking on the welded upper-section tubular pile 51 to a designed elevation B by using a static pressure pile machine.

A grouting pipe 2 is connected above the grouting device 52;

sequentially enabling the grouting pipe 2 to penetrate through the lower pipe-joint pile 53 and the upper pipe-joint pile 51 from bottom to top;

installing a grouting joint at one end of the grouting pipe 2 far away from the grouting device 52;

the grouting joint is connected with a slurry outlet of the high-pressure pump;

the valve of the grout outlet is started and the end of the main pipe pile 19 is grouted through the grouting pipe 2 and the grouting machine 52.

The slurry outlet is provided with a grouting high-pressure pump;

pumping cement into a cement pipe by using a high-pressure pump;

grouting the end part of the main tubular pile 19 by using the grouting device 52, and draining cement slurry grouted by the grouting device 52 into a soil body at the end part of the main tubular pile 19 through the slurry outlet hole 5; grouting is effected and pile foundation 54 is formed.

In the invention, the inner diameter of the grouting pipe 2 is 10-25mm, the outer diameter is 20-30mm, the grouting pipe 2 is a steel pipe, and the height of the steel pipe is 100-200mm lower than the length of the main pipe pile 19. The method comprises the following steps that a static pressure pile machine is used for carrying out static pressure on a lower-section tubular pile 53 towards the underground, the distance A between the lower-section tubular pile and the ground is the distance between the upper top end of the lower-section tubular pile 53 and the ground, and the distance is preferably 0.5 m;

then welding and calibrating the upper tubular pile 51 at the top end of the lower tubular pile 53 extending out of the ground to form a main tubular pile 19, and then continuously performing static pressure pile sinking on the main tubular pile 19 by using a static pressure pile machine to enable the top end of the main tubular pile 19 to reach a designed elevation B, and finishing the static pressure pile sinking work;

grouting the lower bottom surface of the main tubular pile 19 by using the grouting device 52 special for the tubular pile; because the grouting device 52 can enable the grout outlet 5 arranged on the grouting device to be positioned in the horizontal direction of the pile tip, the grouting port for injecting the grouting device 52 can be vertical to the main pipe pile 19, and the purpose of grouting the pile end soil layer of the main pipe pile 19 from the horizontal direction is further realized (as shown in figures 1 a-4), so that the blockage of the grout outlet 5 when the pipe pile is hammered to form a pile (static pressure pile formation) is avoided, the result of pressure grouting failure is avoided, and the grouting success rate reaches 100%.

In the invention, the pile end grouting construction can be carried out, so that the technical problem that the conventional grouting device 52 is easy to block is solved, and the aim of ensuring one-time successful pile end grouting is fulfilled; furthermore, in the process of constructing the prestressed concrete tubular pile, the construction method provided by the invention can save the material consumption of the tubular pile and reduce the cost of the pile foundation, and the special pile end pressure grouting device 52 is adopted to avoid the problem that the grout outlet 5 cannot be opened when the pile tip meets hard objects or rocks, thereby ensuring the success of grouting by 100 percent, enlarging the application range of the prestressed concrete tubular pile, enabling the prestressed concrete tubular pile to replace a large-diameter concrete cast-in-place pile, being used for high-rise buildings with higher requirements on the bearing capacity of the pile foundation, meeting the national building development direction of energy conservation and consumption reduction, and having wide popularization and application prospects.

As shown in fig. 1a-13, the grouter 52 comprises: the grouting pipe comprises a grouting pipe 2, a welding plate 3, a steel pile tip 7 and a pile casing 6, wherein the steel pile tip 7 is arranged at one end of the pile casing 6, the welding plate 3 is arranged at the other end of the pile casing 6, an accommodating cavity 9 is formed between the steel pile tip 7 and the pile casing 6, the accommodating cavity 9 is used for communicating one end of the grouting pipe 2, and the other end of the grouting pipe 2 penetrates through the welding plate 3 and extends into a main pipe pile 19; one end of the grouting pipe 2, which is far away from the accommodating cavity 9, is provided with a connecting joint 1;

the protecting support 4 is arranged on the circumferential outer wall of the protecting cylinder 6, and the protecting support 4 is wound on the circumferential outer wall of the protecting cylinder 6; the circumferential outer wall of the pile casing 6 is also provided with a plurality of slurry outlet holes 5, the slurry outlet holes 5 are positioned below the pile supports 4, and the slurry outlet holes 5 are arranged close to the steel pile tips 7; the outlet end of the grouting pipe 2 is close to the tip end of the steel pile tip 7.

In this embodiment, when the grouting device 52 works specifically, the welding plate 3 is first welded or bolted to the lower end of the main pipe pile 19 (the lower section of pipe pile 53), then one end of the connection joint 1 of the grouting pipe 2 extends upwards from the bottom end of the main pipe pile 19, and is connected with a guide pipe through the connection joint 1, wherein the guide pipe is used for guiding cement slurry, so as to achieve the purpose of grouting by using cement. When the grouting pipe 2 is used for grouting, cement slurry flows into the accommodating cavity 9 through the grouting hole 8 of the grouting pipe 2, firstly enters the part, close to the steel pile tip 7, of the accommodating cavity 9 through the grouting hole 8 under the action of gravity, and in the continuous grouting process, the cement continues to move upwards until the cement slurry does not pass through the grout outlet 5; at the moment, cement paste flows out of the accommodating cavity 9 through the grout outlet 5 and reaches the lower part of the pile body, and due to the fluidity of the cement paste, the cement paste is in contact with the lower section pipe pile 53 in the flowing process and is solidified to be integrated with the lower section pipe pile 53;

specifically, the cement paste firstly reinforces the end part of the lower pipe-saving pile 53 by a transverse injection and permeation method through the grout outlet holes 5 around the accommodating cavity 9, then the cement paste flows back upwards along the pile body under the action of high pressure, the soil layer on the pile side of the lower pipe-saving pile 53 is reinforced by the permeation of the cement paste, and finally, the bottom of the lower pipe-saving pile 53, the grouting device 52 and the poured cement paste form a pile foundation 54 together; because the grout outlet holes 5 are arranged at the four sides of the accommodating cavity 9, the protection function of the support 4 is achieved, the phenomenon that the grouting pipe 2 is blocked and cannot be opened in the process of impacting and pressing the pile can not occur, and the one-time successful grouting at the pile end of the main pipe pile 19 is ensured.

In one embodiment, according to fig. 1a-1B, welding the upper tubular pile 51 and the lower tubular pile 53, and performing static pressure pile sinking on the welded upper tubular pile 51 to a designed elevation B by using a static pressure pile machine, further comprises:

matching the output pressure of the static pile machine according to the geological condition of the construction section; judging the soil layer characteristics in the geological distribution layer according to the pile pressing force of the static pile press, determining grouting pressure and grouting amount according to the geological soil layer characteristics, and determining the grouting amount according to the looseness if the soil quality of the geological soil layer is loose;

the grouting amount of the grouting pipe 2 is adjusted according to the output pressure of the high-pressure pump.

Judging the soil layer characteristics in the geological distribution layer according to the pile pressing force of the static pile press,

judging soil property strength according to soil layer characteristics;

In the embodiment, the characteristic of the geological formation is judged according to the output pressure of the static pile press, and the pressing pressure of the static pile press is adjusted according to the judgment result; when the soil is met in a geological layer with loose soil quality according to the judgment result, the output pressure value of the high-pressure pump can be adjusted, so that the output quantity of cement paste of the grouting pipe 2 is controlled, and the firmness of the foundation is greatly improved; meanwhile, the purpose that excessive cement paste does not need to be poured when the soil layer of the geology has higher strength is reduced, and the purpose that cement paste is saved and the strength of the main pipe pile 19 can be ensured is achieved.

In one embodiment, according to the illustration in fig. 1a to 13, a verticality adjusting mechanism is provided between the upper tubular pile 51 and the lower tubular pile 53, and is used for adjusting the connection portion between the upper tubular pile 51 and the lower tubular pile 53, so that the connection portion between the upper tubular pile 51 and the lower tubular pile 53 can be kept vertical;

the straightness adjustment mechanism that hangs down includes: the clamping device comprises a flange plate 10 and clamping groups, wherein the clamping groups are provided with two groups and are symmetrically positioned on the flange plate 10;

the clamping set comprises an adjusting block 16, a first through hole 17 is formed in the center of the flange plate 10, and the first through hole 17 is used for the upper section of tubular pile 51 and the lower section of tubular pile 53 to penetrate through;

a plurality of strip holes 15 are uniformly distributed on the flange plate 10, the strip holes 15 are used for detachably connecting a first fixing plate 11 and a second fixing plate 14, a movable hole is formed in the second fixing plate 14 and used for enabling the adjusting block 16 to reciprocate, the second fixing plate 14 is arranged close to one side of the first through hole 17, and the first fixing plate 11 is located on one side, far away from the first through hole 17, of the second fixing plate 14;

a V-shaped clamping groove 18 is formed in one side, close to the first through hole 17, of the adjusting block 16, and the V-shaped clamping groove 18 is used for clamping the circumferential outer walls of the upper section of tubular pile 51 and the lower section of tubular pile 53;

the first fixing plate 11 is provided with a threaded hole for being in threaded connection with a first adjusting rod 13, and one side of the first adjusting rod 13, which is close to the second fixing plate 14, is rotatably connected with the adjusting block 16.

In this embodiment, when the upper tubular pile 51 needs to be hoisted above the lower tubular pile 53, the flange 10 is firstly sleeved on the top of the lower tubular pile 53, and then the upper tubular pile 51 is hoisted into the first through hole 17 of the flange 10; at this time, the two first adjusting rods 13 are adjusted to move towards the direction of the first through hole 17, the first adjusting rods 13 drive the adjusting blocks 16 to move towards the direction of the first through hole 17, the V-shaped clamping grooves 18 are clamped on the circumferential outer walls of the upper tubular pile 51 and the lower tubular pile 53, so that the axial center lines of the upper tubular pile 51 and the lower tubular pile 53 are forced to be adjusted together until the adjusting blocks 16 completely clamp the upper tubular pile 51 and the lower tubular pile 53, and at this time, the axial center lines of the upper tubular pile 51 and the lower tubular pile 53 tend to be overlapped; the situation that the joint of the upper tubular pile 51 and the lower tubular pile 53 is not dislocated can be avoided, and the overall stability and firmness of the main tubular pile 19 formed by the upper tubular pile 51 and the lower tubular pile 53 are improved.

The perpendicularity adjusting mechanism is in the course of the work, in case the perpendicularity is corrected successfully, then triggers the welding actuating mechanism, the welding actuating mechanism is used for starting the welding machine, and the realization is right the upper tubular pile 51 with the linking department of lower section tubular pile 53 welds, makes it can form main tubular pile 19, and does benefit to the static pressure stake machine right main tubular pile 19 carries out the purpose of static pressure pile sinking.

Work as the static pressure stake machine will the last top static pressure pile sinking of main tubular pile 19 is to design elevation B after, start the high-pressure pump is right slip casting ware 52 carries out the slip casting, at the slip casting in-process, carries out the regulation of the injected amount through different geological stratification, and further utilizes the injected amount adjustment mechanism realizes carrying out the purpose adjusted to the injected amount.

The first fixing plate 11 is detachably arranged on the strip hole 15 on the flange plate 10 through the fixing bolt 12, so that at least two groups of perpendicularity adjusting mechanisms are mounted, and the main pipe pile is adjusted and corrected by the aid of the at least two groups of perpendicularity adjusting mechanisms.

In one embodiment, as shown in fig. 1a to 13, there are at least two sets of perpendicularity adjusting mechanisms, and the second fixing plate 14 of each perpendicularity adjusting mechanism is provided with a positive contact piece 55 and a negative contact piece 56, respectively, and the positive contact piece 55 and the negative contact piece 56 are symmetrically arranged on one surface of the adjusting block 16 close to the V-shaped clamping groove 18; the positive contact pieces 55 of the two perpendicularity adjusting mechanisms are arranged in a one-to-one correspondence manner, and the negative contact pieces 56 of the two perpendicularity adjusting mechanisms are arranged in a one-to-one correspondence manner; the positive contact piece 55 and the negative contact piece 56 are respectively connected to the welding starting mechanism and used for starting or closing the conduction of the welding starting mechanism and the power module.

In this embodiment, when the verticality adjusting mechanism corrects the verticality of the upper tubular pile 51 and the lower tubular pile 53, the first adjusting rod 13 may be connected to a motor, so as to achieve the correction efficiency and reduce the situation of low manual correction efficiency caused by the fact that the upper tubular pile 51 and the lower tubular pile 53 are too heavy.

After the motor is started, the first adjusting rod 13 rotates, and after the first adjusting rod 13 rotates, the first adjusting rod rotates on the first fixing rod in a threaded manner, so that the adjusting block 16 is pushed to move on the second fixing plate 14 in a penetrating manner, and therefore the adjusting block 16 moves towards the main pipe pile 19, and further the positive contact pieces 55 and the negative contact pieces 56 on each perpendicularity adjusting mechanism are driven to move towards the main pipe pile 19; after the position of the main pipe pile 19 is calibrated, the positive contact piece 55 and the negative contact piece 56 on the two sets of verticality adjusting mechanisms are contacted with each other, and thus the power supply module and the welding starting mechanism are electrically conducted; at this time, the welding starting mechanism is started, so that the welding machine is started, the purpose that the welding machine welds the connecting part of the upper tubular pile 51 and the lower tubular pile 53 is achieved, and the purpose that the upper tubular pile and the lower tubular pile can be welded into a whole to form the main tubular pile 19 is achieved;

in this embodiment, while the correction work of the upper tubular pile 51 and the lower tubular pile 53 is performed in order, the welding mechanism can be started or not started according to the correction result, so that the construction efficiency can be effectively improved, and the situation that the manual operation work efficiency is slow is reduced.

In one embodiment, the weld activation mechanism, according to fig. 1a-13, comprises: a housing 20 and a trigger lever 23,

the housing 20 is a tubular structure, a fixing frame 31 is arranged on the inner wall of the tubular structure, two ends of the fixing frame 31 are respectively connected with the inner wall of the housing 20, the fixing frame 31 is used for connecting a driving mechanism, and the driving mechanism is electrically connected with a power supply module through conduction of the positive contact piece 55 and the negative contact piece 56;

a driving output shaft 67 of the driving mechanism penetrates through the fixed frame 31 and is sequentially connected with the first gear 21 and the first rotating disc 22, a third connecting rod 35 is connected to the circumferential outer wall of the first rotating disc 22, a first rotating shaft 27 is arranged at one end, far away from the first rotating disc 22, of the third connecting rod 35, and the first rotating shaft 27 is rotatably connected with the second gear 28;

a third gear 30 is fixedly connected to the fixing frame 31 through a supporting rod 32, and through holes are formed in the rotating shafts of the first rotating disc 22 and the first gear 21 and used for the supporting rod 32 to penetrate through and be connected with the third gear 30; the peripheral outer wall of the third gear 30 is meshed with the meshing teeth of the peripheral outer wall of the second gear 28;

a third rotating shaft 37 protruding outwards is arranged on the circumferential outer wall of the second gear 28, one end of a fourth connecting rod 36 is rotatably connected to the third rotating shaft 37, the other end of the fourth connecting rod 36 is rotatably connected to the second connecting rod 29, and the second connecting rod 29 is rotatably connected to the supporting rod 32;

the hinged part of the fourth link 36 and the second link 29 is rotatably arranged through a hinged shaft 26, and the hinged part is further connected with a first link 25 through a U-shaped frame 33, and one end of the first link 25, which is far away from the U-shaped frame 33, is provided with a trigger rod 23;

the trigger rod 23, the first connecting rod 25 and the U-shaped frame 33 form a Z-shaped structure, two right-angle tables are oppositely arranged on the inner wall of the shell 20, one surface of each right-angle table 24 is provided with a trigger surface 34, and a trigger switch is arranged on the trigger surface 34;

the trigger bar 23 is used for starting or closing the trigger switch, and the trigger switch is used for starting welding or closing welding of the welding machine.

In this embodiment, when the trigger starting mechanism is operated, the power module conducts the driving mechanism through the positive contact piece 55 and the negative contact piece 56, so that the motor of the driving mechanism can operate, the motor rotates after operating, further drives the rotating shaft connected with the first gear 21 and the first rotating disc 22 to rotate, the first rotating disc 22 rotates and drives the third connecting rod 35 to rotate, the third connecting rod 35 drives the second gear 28 to rotate in a meshing manner on the third gear 30, the fourth connecting rod 36 rotatably arranged on the second gear 28 swings, the fourth connecting rod 36 further realizes the purpose of swinging the first connecting rod 25 rotatably connected with the second connecting rod 29 and the second connecting rod 29 through the limitation of the strut 32 and the second connecting rod 29, and the trigger rod 23 connected with the other end of the first connecting rod 25 in the swinging process strikes and triggers the trigger surface 34 of the right-angle platform 24 under the action of gravity, thereby realizing the purpose of starting the welding switch on one of the trigger surfaces 34; when the triggering surface 34 of the other right-angle stand 24 is reached, the welding switch is closed; after the welding machine is adjusted in welding position, along with the axial rotation of the trigger rod 23 continues to trigger the trigger surfaces 34 of the two right-angle tables 24 at intervals, so that the welding machine is started and closed again, and the upper tubular pile 51 and the lower tubular pile 53 are continuously welded in the circumferential direction in a reciprocating manner. And further improves the construction efficiency of the upper-section tubular pile 51 and the lower-section tubular pile 53. In this embodiment, the welding position of the welding machine may be manually positioned, or may be positioned by a machine, and may be specifically selected according to actual requirements.

In one embodiment, according to fig. 1a-13, the meshing teeth of the circumferential outer wall of the first gear 21 are meshed with the meshing teeth of the circumferential outer wall of a fourth gear 58, the fourth gear 58 is mounted inside the housing 20 and is rotatably arranged inside the housing 20 through a fifth rotating shaft 57;

one side of the fourth gear 58 is provided with a sixth rotating shaft 59 protruding outwards, a fifth connecting rod 60 is rotatably arranged on the sixth rotating shaft 59, one side of the fifth connecting rod 60 away from the fourth gear 58 is hinged with a plunger 61, the plunger 61 is located in a first pressurizing pipeline 62 and reciprocates, the other end of the first pressurizing pipeline 62 is communicated with a storage box 64, the storage box 64 is further provided with a material port 63 and a discharge pipeline 65, the material port 63 is used for being communicated with a slurry outlet of a high-pressure pump through a pipeline, and the discharge pipeline 65 is used for being communicated with one end of the grouting pipe 2 close to the top surface of the main pipe pile 19;

still communicate the drive output shaft 67 of slip casting volume adjustment mechanism through second pressurization pipeline 66 on the ejection of compact pipeline 65, slip casting volume adjustment mechanism includes: the second turntable 50 is of an annular structure, a plurality of support rods 43 are uniformly distributed on the annular inner wall of the second turntable 50, the centers of the support rods 43 are used for fixedly connecting with a driving output shaft 67 of a driving mechanism, the driving output shaft 67 can drive the second turntable 50 to rotate after rotating, and a movable groove 49 of an annular structure is further formed in the surface of the second turntable 50;

the movable groove 49 is provided with a first limiting column 38 and a second limiting column 42, the second limiting column 42 is used for being rotatably connected with one end of a V-shaped rod 40, the other end of the V-shaped rod 40 is provided with an adjusting groove 39, and the adjusting groove 39 is movably arranged on the first limiting column 38; the V-shaped rod 40 is fastened or loosened with the first limit column 38 through a bolt, so that the position of the first limit column 38 in the adjusting groove 39 can be adjusted; the V-shaped opening of the V-shaped rod 40 is arranged towards the circumferential outer wall of the second rotating disc 50;

the driving output shaft 67 is further rotatably arranged on the connecting frame 41, one surface of the connecting frame 41 is provided with an extended upright rod 45, the other end of the upright rod 45 is fixed on the inner wall of the shell 20, one surface of the upright rod 45 is provided with a raised limiting block 46, the limiting block 46 is provided with a through hole, the through hole is used for reciprocating motion of a second adjusting rod 47, one surface, close to the second turntable 50, of the second adjusting rod 47 is rotatably connected with a rotating wheel 44 through a fourth rotating shaft 48, and the rotating wheel 44 is in contact with the circumferential outer wall of the second turntable 50 and one surface, far away from the V-shaped notch, of the V-shaped rod 40; a limiting plate 68 is arranged on the second adjusting rod 47, and a spring 69 is arranged between the limiting plate 68 and the limiting block 46.

In this embodiment, when the welding starting mechanism is started, the first gear 21 rotates and is meshed with the fourth gear 58, so as to realize the rotation of the fourth gear 58, the fourth gear 58 rotates and carries the fifth connecting rod 60 with the surface thereof movably connected to reciprocate, so that the plunger 61 connected with the fifth connecting rod 60 is pressurized on the first pressurizing pipeline 62, and after the first pressurizing pipeline 62 is pressurized, the feeding valve of the material port 63 is opened, so that the material port 63 is used for communicating with the slurry outlet of the high-pressure pump through a pipeline to guide the cement to the material storage tank 64; the aim that the storage box 64 can buffer the cement is achieved, and then the buffered cement is guided to the discharging pipeline 65 through the discharging pipeline 65; the purpose of quantitative drainage is carried out to the cement that the high-pressure pump pumped in automation from this, reduces directly to go into the grout pipe 2 with cement in a large number and causes the uncontrollable condition of injection quantity, and then reduces the condition that the overflow appears among the cement slip casting process.

Further, in this embodiment, the connected grouting amount adjusting mechanism may also adjust the grouting amount through the grouting amount adjusting mechanism according to the geological formation currently under construction, and the specific working principle is as follows:

when the grouting amount adjusting mechanism connected with the discharge pipeline 65 works, the driving mechanism can be a motor, when the motor drives the driving mechanism, the driving output shaft 67 rotates to drive the second turntable 50 to rotate, the V-shaped rod 40 arranged on the circumferential outer wall of the second turntable 50 can be adjusted according to actual use, and the rotating wheel 44 is driven by the annular motion track formed by the V-shaped rod 40 and the circumferential outer wall of the second turntable 50 according to the position of the first limiting column 38 in the adjusting groove 39; when the distance between the V-shaped notch of the V-shaped rod 40 and the center of the second rotating disc 50 is farther, the grouting amount is larger; when the distance between the V-shaped groove opening of the V-shaped rod 40 and the center of the second turntable 50 is closer, the grouting amount is smaller; the adjustment of the output of the grouting amount is realized by adjusting the distance between the V-shaped rod 40 and the second turntable 50;

one end of the second adjusting rod 47, which is far away from the rotating wheel 44, is connected with a plunger 61, the plunger 61 is movably arranged on a first pressurizing pipeline 62, and the other end of the first pressurizing pipeline 62 is communicated with one end of the second pressurizing pipeline 66, which is far away from a discharge pipeline 65; therefore, the purpose of pressurizing the discharging pipeline 65 by using the second adjusting rod 47 is achieved, the situation that cement is jammed in the grouting pipe 2 can be reduced in the process of pressurizing the discharging pipeline 65, the grouting amount can be adjusted, and the working efficiency of the grouting device 52 in the process of grouting by using the grouting pipe 2 is effectively improved; and the condition that the cement blockage at the grouting pipe 2 causes the insufficient pouring amount of the pile foundation 54 at the lower end of the main pipe pile 19 due to the cement blockage is reduced, so that the stability of the pile foundation 54 of the main pipe pile 19 in the ground is enhanced, and the construction requirement can be met.

In one embodiment, further comprising: judging the characteristics of a geological layer according to the pressure value acquired by a pressure sensor of the static pile press, and judging whether hard foreign matters are mixed in the geological layer according to the characteristics of the geological layer;

if the hard foreign matter is mixed, adjusting the static pressure output value of the static pressure pile machine according to the thickness or the size of the hard foreign matter;

and judging whether the geological formation has a tree root or not according to the pressure value acquired by the pressure sensor of the static pressure pile machine, and starting the lime injection mechanism if the tree root exists.

In this embodiment, the characteristics of the geological formation are judged by using the pressure information collected by the pressure sensor of the static pressure pile machine, and the pressure applied by the static pressure pile machine is adjusted according to the judgment result, so that whether grouting reinforcement is performed on the side wall of the main pipe pile 19 when the construction section encounters a geological formation with loose soil texture is realized;

or when hard foreign matters are met, the static pressure output value of the static pressure pile machine is adjusted according to the hard foreign matters, so that the situation that the tip of the grouting device 52 is broken in the static pressure process of the static pressure pile machine is reduced,

if the tree roots are encountered in the construction process, the lime injection mechanism is started, and lime is injected into the geological layer with the tree roots by the lime injection mechanism, so that the condition that the tree roots damage the foundation in the growth process is reduced.

It will be apparent to those skilled in the art that various changes and modifications may be made in the present invention without departing from the spirit and scope of the invention. Thus, if such modifications and variations of the present invention fall within the scope of the claims of the present invention and their equivalents, the present invention is also intended to include such modifications and variations.

Claims

1. A pile end pressure grouting construction method for a prestressed concrete pipe pile is characterized by comprising the following steps:

removing the static pile machine, and performing high-pressure grouting on the lower end of the main pipe pile by using a grouting pipe;

a verticality adjusting mechanism is arranged between the upper section tubular pile and the lower section tubular pile and is used for adjusting a connecting part between the upper section tubular pile and the lower section tubular pile so that the connecting part between the upper section tubular pile and the lower section tubular pile can be kept vertical;

the straightness adjustment mechanism that hangs down includes: the clamping groups are provided with two groups and are symmetrically positioned on the flange plate;

the clamping set comprises a regulating block, a first through hole is formed in the center of the flange plate, and the first through hole is used for the upper section of tubular pile and the lower section of tubular pile to penetrate through;

a plurality of strip holes are uniformly distributed on the flange plate and used for detachably connecting a first fixing plate and a second fixing plate, a movable hole is formed in the second fixing plate and used for enabling the adjusting block to reciprocate, the second fixing plate is arranged close to one side of the first through hole, and the first fixing plate is positioned on one side, away from the first through hole, of the second fixing plate;

one side, close to the first through hole, of the adjusting block is provided with a V-shaped clamping groove, and the V-shaped clamping groove is used for clamping the circumferential outer walls of the upper section of tubular pile and the lower section of tubular pile;

the first fixing plate is provided with a threaded hole used for being in threaded connection with a first adjusting rod, and one side, close to the second fixing plate, of the first adjusting rod is in rotating connection with the adjusting block;

the perpendicularity adjusting mechanisms are at least provided with two groups, a second fixing plate of each perpendicularity adjusting mechanism is respectively provided with a positive contact piece and a negative contact piece, and the positive contact pieces and the negative contact pieces are respectively and symmetrically arranged on one surface, close to the V-shaped clamping groove, of the adjusting block; the positive contact pieces of the two verticality adjusting mechanisms are arranged in a one-to-one correspondence manner, and the negative contact pieces of the two verticality adjusting mechanisms are arranged in a one-to-one correspondence manner; the positive contact piece and the negative contact piece are respectively connected with the welding starting mechanism and are used for starting or closing the conduction of the welding starting mechanism and the power supply module;

the welding starting mechanism comprises: a shell and a triggering rod, wherein the shell is provided with a plurality of through holes,

the shell is of a tubular structure, a fixing frame is arranged on the inner wall of the tubular structure, two ends of the fixing frame are respectively connected with the inner wall of the shell, the fixing frame is used for being connected with a driving mechanism, and the driving mechanism is electrically connected with a power supply module through conduction of the positive contact piece and the negative contact piece;

a driving output shaft of the driving mechanism penetrates through the fixed frame and is sequentially connected with a first gear and a first rotary table, a third connecting rod is connected to the circumferential outer wall of the first rotary table, a first rotating shaft is arranged at one end, far away from the first rotary table, of the third connecting rod, and the first rotating shaft is rotatably connected with a second gear;

the fixing frame is fixedly connected with a third gear through a supporting rod, and through holes are formed in rotating shafts of the first rotating disc and the first gear and used for the supporting rod to penetrate through and be connected with the third gear; the circumferential outer wall of the third gear is meshed with the meshing teeth of the circumferential outer wall of the second gear;

a third rotating shaft which protrudes outwards is arranged on the circumferential outer wall of the second gear, one end of a fourth connecting rod is rotatably connected to the third rotating shaft, the other end of the fourth connecting rod is rotatably connected with a second connecting rod, and the second connecting rod is rotatably connected with a supporting rod;

a hinged part of the fourth connecting rod and the second connecting rod is rotatably arranged through a hinged shaft, the hinged part is also connected with a first connecting rod through a U-shaped frame, and one end of the first connecting rod, which is far away from the U-shaped frame, is provided with a trigger rod;

the trigger rod, the first connecting rod and the U-shaped frame form a Z-shaped structure, two right-angle tables are oppositely arranged on the inner wall of the shell, one surface of each right-angle table is provided with a trigger surface, and a trigger switch is arranged on each trigger surface;

the trigger bar is used for starting or closing the trigger switch, and the trigger switch is used for starting welding or closing welding of a welding machine.

2. The pressure grouting construction method for pile ends of prestressed concrete pipe piles as claimed in claim 1, wherein the lower section of pipe pile and the upper section of pipe pile are hoisted in sequence, and the connecting parts of the lower section of pipe pile and the upper section of pipe pile are welded into a whole to form a main pipe pile, further comprising:

3. The pile-end pressure grouting construction method of a prestressed concrete pipe pile according to claim 1,

hoist lower section tubular pile and upper segment tubular pile in proper order to weld the connecting portion of lower section tubular pile and upper segment tubular pile as an organic whole, form the main tubular pile, still include:

4. The method of pressure grouting pile end of prestressed concrete pipe pile according to claim 1, wherein said welding the grouting device to the pile end of the lower section of pipe pile further comprises:

a grouting pipe is connected above the grouting device;

the grouting joint is connected with a slurry outlet of the high-pressure pump;

5. The pile-end pressure grouting construction method of the prestressed concrete pipe pile as claimed in claim 4, wherein the grout outlet is provided with a grouting high-pressure pump;

pumping cement into a cement pipe by using a high-pressure pump;

6. The pile-end pressure grouting construction method of a prestressed concrete pipe pile according to claim 3,

welding upper segment tubular pile and lower section tubular pile, utilize static pile machine to carry out the pile that sinks to the design elevation of static pressure with the upper segment tubular pile that the welding is good, still include:

7. The pile-end pressure grouting construction method of a prestressed concrete pipe pile according to claim 6, wherein matching with the output pressure of a static pile machine is performed according to the geological conditions of the construction section, further comprising:

8. The pile-end pressure grouting construction method of a prestressed concrete pipe pile according to claim 6,

judging soil property strength according to soil layer characteristics;

if the output pressure of the static pressure pile machine is higher than the preset value, the geological characteristics of the bearing stratum of static pressure construction are strong, namely the soil layer strength of soil is high.