CN116180733A - Construction method of H-shaped revetment pile - Google Patents

Abstract

The construction method of the H-shaped revetment pile comprises the steps of firstly, aligning a hole guiding device to a pile position and enabling the hole guiding device to be vertical; then driving the lifting mechanism to ensure that the hole guiding device descends slowly and uniformly; simultaneously, starting the high-pressure pump and the slurry pump; when the hole guiding device slowly and gradually descends, the knife edge firstly cuts into soil; then the high-pressure water flow sprayed out of the high-pressure nozzle pipeline enters the high-pressure chamber, and the high-pressure water flow group cuts up soil in the high-pressure chamber instantly; mixing the minced soil body with water in the high-pressure chamber to form slurry, leading out the slurry from a plurality of slurry suction ports around the high-pressure chamber, and leading away the slurry through a slurry suction branch pipe and a slurry suction main pipe, thereby completing the output of the soil body; the hole guiding device is continuously lowered, the above process is repeated until the hole guiding device is cut to the specified depth, and then the lifting mechanism is started to lift the hole guiding device upwards and lead out the hole guiding device, so that an H-shaped hole guiding consistent with the outline of the H-shaped revetment pile is formed. The construction method of the H-shaped revetment pile can improve the construction speed.

Description

Construction method of H-shaped revetment pile

Division application of 'construction equipment and method of H-shaped revetment pile' (application number 202111581798X) based on mother application

Technical Field

The invention relates to the field of construction of revetment piles, in particular to a construction method of an H-shaped revetment pile.

Background

The artificial ecological wetland engineering can improve the water quality of water supplied by the water plant and relieve the problem of unstable water quality of water taken by the water plant caused by instantaneous change of raw water. The water purifier can be used for purifying raw water in daily life, and can enable the water quantity stored in the wetland to be used as an emergency standby water source of a water plant when an emergency occurs in the river, so that the safety water supply is ensured.

The artificial ecological wetland engineering often needs to be provided with a diversion dike to play a role in diversion of the wetland water body. The geology of the diversion dike is mostly the soil layer of the easily disturbed weak field such as muddy clay, quicksand and the like, if the construction modes such as excavation supporting, on-site pouring and the like are adopted, one is large in excavation quantity, the natural original appearance of the wetland can be greatly damaged, the manufacturing cost is increased, and the other is large in construction period. The prefabricated H-shaped shore protection pile is developed by manufacturers according to practice and is directly inserted and beaten to form the main body of the guide dike.

The H-shaped shore protection pile adopts pretensioned prestressed concrete H-shaped shore protection pile:

(1) The model of the H-shaped revetment pile adopts PH 400-600-I-13 (meaning: pretensioned prestressed concrete H-shaped revetment pile has a section width of 400mm, a height of 600mm and a I-shaped pile length of 13 m), and the concrete quality meets the relevant regulations of the current national standard 'concrete quality control standard' (GB 50164) and is inspected according to the requirements of the standard;

(2) The cement should be cement with strength grade not lower than 42.5, and the cement can be Portland cement, portland cement and slag silicate disc cement, and its quality should meet the related regulations of the current national standard "Portland Cement", GB 175;

(3) The shear design value of the H-shaped revetment pile is 175KN, the prestress steel strand used by the main reinforcement is a 1 multiplied by 7 structure steel strand with the tensile strength not less than 1860MPa, and the quality of the prestress steel strand is required to meet the related regulations of national standard 'steel strand for prestress concrete' GB/T5224. The stirrup adopts a cold-drawn low-carbon steel wire for a low-carbon steel hot-rolled wire rod and a concrete product, and the quality of the stirrup accords with the related regulations of the current national standard GB/T701 of the low-carbon steel hot-rolled wire rod and the current industry standard JC/T540 of the cold-drawn low-carbon steel wire for the concrete product;

(4) The performance of the H-shaped shore protection pile end plate is suitable to meet the related regulations of the existing industry standard of the end plate for pretensioned prestressed concrete pipe piles of JC/T947, and the performance of the end plate and pile sleeve hoop materials is suitable to meet the regulations of Q235B in the existing national standard of carbon structural steel GB/T700;

(5) The reinforcement ratio of the H-shaped shore protection pile is not lower than 0.5%, the thickness of the longitudinal reinforcement protection layer is not lower than 40mm, and the concrete strength is not lower than C60.

In the prior art, a direct penetration type construction process is mainly adopted, namely: firstly, aligning an H-shaped revetment pile with a pile position and keeping the pile position vertical, then, directly hammering a pile head by using a diesel hammer of a pile driver, extruding a pile body downwards, discharging soil, and repeatedly hammering the pile head until the pile is hammered to a specified depth.

The process has the main defects that:

(1) The quality and the integrity of the pile body of the H-shaped revetment pile are affected. The hammer head directly hammers the pile head, so that the pile body can generate vibration crack, and the service life and strength of the pile are reduced;

(2) The construction efficiency is low. The pre-tensioned prestressed concrete H-shaped revetment pile has the advantages of 400mm in section width, 600mm in height, large section size, larger soil resistance when being downwards applied and low construction efficiency. If the hammering force is increased, the damage degree of the pile body is increased, and even the pile body is crushed.

Disclosure of Invention

The invention aims to solve the technical problem of providing the construction method of the H-shaped revetment pile, which overcomes the defects of the existing construction, improves the construction speed, protects the integrity of the pile body and provides a guarantee for constructed wetland construction.

In order to solve the technical problems, the invention adopts the following technical scheme:

the construction method of the H-shaped revetment pile comprises the following steps:

step one: the construction equipment is walked to the vicinity of the pile position, the hole guiding device is aligned to the pile position, and the hole guiding device is vertical by adjusting the first telescopic mechanism and the second telescopic mechanism;

step two: the lifting mechanism is driven to ensure that the hole guiding device descends slowly and uniformly; simultaneously, starting a high-pressure pump connected with the high-pressure water inlet pipe and starting a slurry pump connected with the slurry outlet pipe;

step three: when the hole guiding device slowly and gradually descends, the knife edge firstly cuts into soil, so that the lower end of the high-pressure chamber is blocked; then a plurality of high-pressure nozzle pipelines simultaneously spray high-pressure water flow into the high-pressure chamber, and the high-pressure water flow group cuts up soil in the high-pressure chamber instantly;

step four: mixing the minced soil body with water in the high-pressure chamber to form slurry, leading out the slurry from a plurality of slurry suction ports around the high-pressure chamber, and leading away the slurry through a slurry suction branch pipe and a slurry suction main pipe, thereby completing the output of the soil body;

step five: the hole guiding device is continuously lowered, the processes of the steps three to four are repeated until the hole guiding device is cut to a specified depth, and then the lifting mechanism is started to lift the hole guiding device upwards and lead out the hole guiding device, so that an H-shaped hole guiding consistent with the outline of the H-shaped revetment pile is formed;

step six: because the clamp on the other side of the construction equipment clamps the H-shaped shore protection pile, the construction equipment can be moved at the moment, the H-shaped shore protection pile is aligned to the guiding hole, the lifting adjusting mechanism is adjusted, the H-shaped shore protection pile is sent into the guiding hole and is sunk to the bottom, and the construction of the H-shaped shore protection pile is completed;

step seven: repeating the first to sixth steps until the construction of the H-shaped shoreside pile is completed.

The invention discloses a construction method of an H-shaped revetment pile, which has the following technical effects:

1) The H-shaped holes can be formed quickly by cutting and sucking the slurry through high-pressure water, so that the H-shaped revetment piles can be conveniently and directly placed without beating, the efficiency can be improved, meanwhile, the pile body vibration cracking can be avoided, and the service life and strength of the piles are prolonged.

2) And (1) the original soil foundation is deposited for many years, and the soil layer is stable. The pile hole formed by high-pressure soil cutting is relatively small in size, and is finished in a high-pressure chamber, and soil on the side wall of the pile hole cannot be cut or washed under the protection of the casing of the chamber. The hole cannot be easily collapsed. (2) In the pore-forming process, the mud generates static pressure to the pore wall to form mud skin on the pore wall, and the pore wall collapse can be effectively prevented.

Drawings

The invention is further illustrated by the following examples in conjunction with the accompanying drawings:

fig. 1 is a schematic structural view of the present invention.

Fig. 2 is a schematic diagram of the internal structure of the hole guiding device in the present invention.

Fig. 3 is a schematic view of the external structure of the hole guiding device in the present invention.

Fig. 4 is a front view of the hole guiding device of the present invention.

Fig. 5 is a bottom view of the hole guiding device of the present invention.

Fig. 6 is a schematic diagram of the structure at a in fig. 1.

Fig. 7 is a schematic structural view of the lifting mechanism.

In the figure: the crawler chassis 1, the mounting plate 2, the first telescopic mechanism 3, the lifting mechanism 4, the cross beam 5, the connecting rod 6, the second telescopic mechanism 7, the hole guiding device 8, the high-pressure chamber 8.1, the high-pressure nozzle pipeline 8.2, the water spraying main pipe 8.3, the high-pressure water inlet pipe 8.4, the slurry suction port 8.5, the slurry suction branch pipe 8.6, the slurry suction main pipe 8.7, the slurry outlet pipe 8.8, the knife edge 8.9, the shell 8.10, the clamp 9, the left clamp plate 9.1, the right clamp plate 9.2, the third telescopic mechanism 9.3, the high-pressure pump 10 and the slurry pump 11.

Detailed Description

As shown in figure 1, the construction equipment of the H-shaped revetment pile comprises a crawler chassis 1, wherein the crawler chassis 1 adopts the prior art

The universal structure can drive the corresponding gears on the rotating shafts to rotate through the first motor and the second motor, so that the crawler belt moves. The middle shell of the crawler chassis 1 is internally provided with a hydraulic system and a control box, and the control box is in wireless connection with a remote controller through wireless communication; the motion direction, start and stop of the crawler belt and the actions of the power mechanisms are operated by the remote controller.

By adopting the crawler belt for driving, the crawler wheels can reduce the pressure of the equipment to the ground, are convenient for walking on soft and muddy or rugged construction sites, and can avoid sinking.

Two groups of lifting adjusting mechanisms are arranged on the platform of the crawler chassis 1, and are arranged left and right; thus, balance can be maintained, and simultaneously, punching and H-shaped shoreside pile placement can be realized. The lifting adjusting mechanism comprises a mounting plate 2 hinged on the crawler chassis 1, a first telescopic mechanism 3 is hinged on the back surface of the mounting plate 2, and a cylinder body at the other end of the first telescopic mechanism 3 is hinged with an ear plate on a platform of the crawler chassis 1. The first telescopic mechanism 3 is a hydraulic cylinder, and the mounting plate 2 can be driven to rotate in a vertical plane through the telescopic action of the first telescopic mechanism 3. The front of the mounting plate 2 is provided with a lifting mechanism 4, the output end of the lifting mechanism 4 is provided with a cross beam 5, and the lifting mechanism 4 can drive the cross beam 5 to move up and down. And the other end of the cross beam 5 is hinged with a connecting rod 6, an ear plate is fixed on the connecting rod 6, one end of the second telescopic mechanism 7 is hinged with the connecting rod 6 through a pin shaft, and the other end of the second telescopic mechanism 7 is hinged with the cross beam 5. The second telescopic mechanism 7 is a hydraulic cylinder, and the connecting rod 6 can be driven to rotate in a vertical plane through the telescopic action of the second telescopic mechanism 7.

The first telescopic mechanism 3 and the second telescopic mechanism 7 are adopted to realize the adjustment of the angle of the connecting rod 6.

The lower end of the lifting adjusting mechanism on the left side is fixedly connected with a hole guiding device 8, the whole top view of the hole guiding device 8 is H-shaped, and the section size of the hole guiding device is slightly smaller than that of the H-shaped revetment pile. And when the hole is slightly smaller, the pile is lowered, and the pile body can expand and squeeze soil from the hole, so that the tight connection between the pile and the soil body is ensured, and the stability of the pile is improved. If the hole is slightly bigger, the pile may swing in the hole after the pile is placed, and the pile is unstable. The hole guiding device 8 is used for guiding holes; and the lower end of the lifting adjusting mechanism of the right side sheet is fixedly connected with a clamp 9, and the clamp 9 is used for clamping the H-shaped shore protection pile.

Specifically, the hole guiding device 8 comprises a high-pressure chamber 8.1, the lower end of the high-pressure chamber 8.1 is opened, a knife edge 8.9 is arranged at the opening, and the knife edge 8.9 gradually and inwards contracts from top to bottom. The knife edge 8.9 is beneficial to the high-pressure chamber 8.1 to cut into the soil body, and after the knife edge 8.9 cuts into the soil body, the high-pressure chamber 8.1 can be relatively sealed, so that water spraying and slurry discharging are facilitated. The top plate at the upper end of the high-pressure chamber 8.1 is communicated with a plurality of groups of high-pressure nozzle pipelines 8.2, the diameter of each high-pressure nozzle pipeline 8.2 is 0.2-0.5mm, water after multistage pressurization can be sprayed out at a flow rate of 3.7L/min, at the moment, the water pressure can reach 380Mpa, the soil body in the inner cavity can be cut up by high-energy water flow, and the crushed soil and the water body in the cavity are mixed to form slurry. The upper ends of the groups of high-pressure nozzle pipelines 8.2 are connected with the water spraying main pipe 8.3. The water spraying main pipe 8.3 is of a cavity structure, the other end of the water spraying main pipe 8.3 is connected with the high-pressure water inlet pipe 8.4, the high-pressure water inlet pipe 8.4 is connected with the high-pressure pump 10 through a connecting pipeline, and high-pressure water flow is pumped into the high-pressure water pump 10. And a plurality of pulp sucking ports 8.5 are arranged on the side wall of the high-pressure chamber 8.1, one end of each pulp sucking port 8.5 is communicated with the high-pressure chamber 8.1, and the other end is communicated with the pulp sucking branch pipe 8.6. The slurry suction port 8.5 can suck the slurry in the high-pressure chamber 8.1 and output the slurry through the slurry suction branch pipe 8.6 connected with the slurry suction port. The pulp sucking branch pipe 8.6 is connected with the pulp sucking main pipe 8.7, the pulp sucking main pipe 8.7 is of a cavity structure, the upper end of the pulp sucking main pipe 8.7 is connected with the pulp outlet pipes 8.8, the pulp outlet pipes 8.8 are two groups, and the two groups of pulp outlet pipes 8.8 are finally connected with the slurry pump 11 through connecting pipelines. The slurry is conveyed to a slurry suction main pipe 8.7, and is output by two groups of slurry outlet pipes 8.8, and is discharged through a slurry pump 11. And a shell 8.10 is fixed outside the high-pressure chamber 8.1, and the shell 8.10 is kept to be attached to the hole wall.

The slurry suction port 8.5 is arranged at the middle position, and the lower slurry of the high-pressure chamber 8.1 is sticky, the water content in the upper slurry is overlarge, and the middle slurry is uniform.

Specifically, the clamp 9 includes a left clamping plate 9.1 and a right clamping plate 9.2, and the left clamping plate 9.1 and the right clamping plate 9.2 are relatively close to or far away from each other through a third telescopic mechanism 9.3. The third telescopic mechanism 9.3 is a hydraulic cylinder, and when the third telescopic mechanism 9.3 stretches out, the left clamping plate 9.1 and the right clamping plate 9.2 are far away, and the H-shaped shore protection pile is released; when the third telescopic mechanism 9.3 is retracted, the left clamping plate 9.1 and the right clamping plate 9.2 are close to each other to clamp the H-shaped shore protection pile.

Specifically, the lifting mechanism 4 comprises a shell 4.1, a screw rod 4.2 is vertically arranged in the shell 4.1 through a bearing, and the screw rod 4.2 is driven to rotate through a motor 4.3. The screw rod 4.2 is in threaded connection with the nut 4.4, a connecting shaft is arranged at the left and right sides of the nut 4.4, the connecting shaft freely penetrates through waist holes at the left and right ends of the shell 4.1 and then is rotatably connected with the travelling wheel 4.5, and the travelling wheel 4.5 is arranged on the guide rail 4.6 in a sliding manner and limited by the guide rail 4.6 up and down. When the motor 4.3 is started, the screw rod 4.2 rotates to further enable the nut 4.4 to move up and down, and then the cross beam 5 is driven to move up and down.

The construction method of the H-shaped revetment pile comprises the following steps:

step one, an H-shaped revetment pile enters:

(1) piling the H-shaped shore protection piles in an open environment for 3-7 days, and leaving a factory after the piles are inspected to be qualified;

(2) the H-shaped revetment pile is hoisted by adopting a two-pivot method or a two-head hairpin hoisting method, the distance between two hoisting points (the two-pivot method) and the pile end is 0.2L (L is the pile length), and the horizontal included angle between the rope and the pile body is not smaller than 45 degrees. When loading and unloading, the vehicle should be lifted and put lightly, the throwing is forbidden, and the vehicle collides and rolls off;

(3) the supporting point in the transportation process of the H-shaped revetment pile is required to meet the position of a two-supporting point method (the position of the supporting point is 0.2L away from the pile end), and the wedge-shaped wood-masking is used for cushioning to prevent rolling, so that dislocation is caused by unequal distances between the layers and the pile end. When the automobile is transported, the number of stacking layers is not more than two, if the number is ensured, the number of stacking layers can be increased properly;

(4) the H-shaped revetment pile storage yard should be compacted and leveled, and has drainage measures. The stacking of the H-shaped revetment piles is carried out according to a two-fulcrum method, the fulcrum of the lowest layer is preferably placed on the skid, and all the fulcrums are on the same horizontal plane. Pile strength specifications. The comprehensive analysis of the ground bearing capacity, the skid, the stacking stability and the like determines that the stacking layer number of the H-shaped revetment piles is not more than 8.

Step two, measuring and lofting: before construction, the axis of the guide dike and each pile position are placed, and paint is coated on the center of the pile position to make the mark obvious. If the construction is performed on a softer place, the pile position is rechecked after the equipment is generally in place because the running of the equipment affects the position of the mark.

Step three, positioning equipment: the construction equipment is moved to the vicinity of the pile position, the hole guiding device 8 is aligned with the pile position, and the hole guiding device 8 is vertical by adjusting the first telescopic mechanism 3 and the second telescopic mechanism 7; perpendicularity can be checked by plumb lines.

Step four, the hole guiding device falls down: the lifting mechanism 4 is driven to ensure that the hole guiding device 8 descends slowly and uniformly; at the same time, the high-pressure pump 10 connected to the high-pressure water intake pipe 8.4 is turned on, and the slurry pump 11 connected to the slurry outlet pipe 8.8 is turned on.

Cutting up soil mass: when the hole guiding device 8 slowly and gradually descends, the knife edge 8.9 firstly cuts into soil, so that the lower end of the high-pressure chamber 8.1 is blocked; then a plurality of high-pressure nozzle pipelines 8.2 simultaneously spray high-pressure water flow into the high-pressure chamber 8.1, and the high-pressure water flow group cuts up soil in the high-pressure chamber 8.1 instantly.

Step six, mud is discharged: the minced soil body is mixed with water in the high-pressure chamber 8.1 to form slurry, and the slurry is led out from a plurality of slurry suction ports 8.5 around the high-pressure chamber 8.1 and is led away through a slurry suction branch pipe 8.6 and a slurry suction main pipe 8.7, so that the output of the soil body is completed.

Step seven, pore-forming: the hole guiding device 8 is continuously lowered, the processes of the steps three to four are repeated until the cutting is carried out to the specified depth, and then the lifting mechanism 4 is started to lift and guide out the hole guiding device 8 upwards, so that an H-shaped hole guiding consistent with the outline of the H-shaped revetment pile is formed.

Step eight, pile sinking: because the clamp 9 at the other side of the construction equipment clamps the H-shaped shore protection pile, the construction equipment is moved at the moment, the H-shaped shore protection pile is aligned with the guiding hole, the lifting adjusting mechanism is adjusted, the H-shaped shore protection pile is sent into the guiding hole and is sunk to the bottom, and the construction of the H-shaped shore protection pile is completed.

Step nine: repeating the first to sixth steps until the construction of the H-shaped shoreside pile is completed.

Claims (1)

1. A method for constructing an H-shaped revetment pile by H-shaped revetment pile construction equipment comprises the following steps:

step one: the construction equipment is walked to the vicinity of the pile position, the hole guiding device (8) is aligned to the pile position, and the hole guiding device (8) is vertical by adjusting the first telescopic mechanism (3) and the second telescopic mechanism (7);

step two: the lifting mechanism (4) is driven to ensure that the hole guiding device (8) descends slowly and uniformly; simultaneously, a high-pressure pump (10) connected with a high-pressure water inlet pipe (8.4) is started, and a slurry pump (11) connected with a slurry outlet pipe (8.8) is started;

step three: when the hole guiding device (8) slowly and gradually descends, the knife edge (8.9) firstly cuts into soil, so that the lower end of the high-pressure chamber (8.1) is blocked; then a plurality of high-pressure nozzle pipelines (8.2) jet high-pressure water flow into the high-pressure chamber (8.1) at the same time, and the high-pressure water flow group cuts up soil in the high-pressure chamber (8.1) instantly;

step four: the minced soil body is mixed with water in the high-pressure chamber (8.1) to form slurry, and the slurry is led out from a plurality of slurry suction ports (8.5) around the high-pressure chamber (8.1) and is led away through a slurry suction branch pipe (8.6) and a slurry suction main pipe (8.7), so that the output of the soil body is completed;

step five: the hole guiding device (8) is continuously lowered, the processes of the steps three to four are repeated until the cutting is carried out to a specified depth, and then the lifting mechanism (4) is started to lift the hole guiding device (8) upwards and lead out, so that an H-shaped hole guiding consistent with the outline of the H-shaped revetment pile is formed;

step six: because the clamp (9) at the other side of the construction equipment clamps the H-shaped shore protection pile, the construction equipment can be moved at the moment, the H-shaped shore protection pile is aligned with the guiding hole, the lifting adjusting mechanism is adjusted, the H-shaped shore protection pile is sent into the guiding hole and is sunk to the bottom, and thus the construction of the H-shaped shore protection pile is completed;

step seven: repeating the first to sixth steps until the construction of the H-shaped shoreside pile is completed.

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