A construction method of H-type revetment pile

Abstract

A kind of H type revetment pile construction method, first with the hole guiding device aiming at pile position, and make the hole guiding device vertical;Then drive lifting mechanism, ensure that the hole guiding device slowly, even speed drop;At the same time, start high pressure pump, mud pump;When the hole guiding device slowly gradually drops, cutter first cuts into the soil body;Then high pressure nozzle pipe sprays high pressure water flow into high pressure chamber, and high pressure water flow group instantaneously cuts the soil body in high pressure chamber;The soil body cut into pieces mixes with water in high pressure chamber to form mud, then is led out by multiple mud suction ports around high pressure chamber, is led away by suction branch pipe and suction main pipe, thereby completing the output of soil body;The hole guiding device keeps on dropping, repeats the above process, until cutting to specified depth, then starts lifting mechanism, and lifts the hole guiding device upward and leads out, thereby forming the "H" type hole guiding device consistent with the outline of H type revetment pile.The H type revetment pile construction method provided by the application can improve the construction speed.

Description

[0001] Divisional application based on parent case "H-type revetment pile construction equipment and method" (application number 202111581798X) TECHNICAL FIELD

[0002] The present application relates to the field of revetment pile construction, in particular to an H-type revetment pile construction method. BACKGROUND

[0003] The artificial ecological wetland project can improve the water quality of the water plant, alleviate the problem of unstable water quality of the water plant due to instantaneous changes of raw water. It can be used for purifying raw water daily, and when pollution emergencies occur in external rivers, the stored water in the wetland can be used as an emergency backup water source for the water plant to ensure safe water supply.

[0004] The artificial ecological wetland project often needs to set up a diversion dike to guide the water body of the wetland. The geology where the diversion dike is located is mostly silt clay, quicksand and other easily disturbed weak site soil layers. If excavation and support, on-site pouring and other construction methods are used, one is that the excavation volume is huge, which will cause great damage to the natural appearance of the wetland and increase the cost, and the other is that it greatly occupies the construction period. Some manufacturers have developed prefabricated H-type revetment piles according to practice, which are directly inserted and driven to form the main body of the diversion dike.

[0005] The H-type revetment pile adopts a pre-tensioned prestressed concrete H-type revetment pile:

[0006] (1) The H-type revetment pile model adopts PH400-600-Ⅰ-13 (meaning: pre-tensioned prestressed concrete H-type revetment pile cross-section width 400mm, height 600mm, type I pile length 13m), the concrete quality shall comply with the relevant provisions of the current national standard "Concrete Quality Control Standard" (GB 50164), and be inspected according to the requirements of the standard;

[0007] (2) The cement shall be of strength grade not less than 42.5 grade, and the cement can be portland cement, ordinary portland cement, slag portland cement, the quality of which shall comply with the relevant provisions of the current national standard "General Portland Cement" GB175;

[0008] (3) The shear design value of the H-type revetment pile is 175KN, the pre-stressed steel strand used for the main reinforcement is 1x7 structural steel strand with tensile strength not less than 1860MPa, the quality of which shall comply with the relevant provisions of the current national standard "Steel Strand for Prestressed Concrete" GB / T5224. The stirrup adopts low-carbon steel hot-rolled round disc strip and cold-drawn low-carbon steel wire for concrete products, the quality of which shall comply with the relevant provisions of the current national standard "Low-carbon Steel Hot-rolled Round Disc Strip" GB / T701 and the current industry standard "Cold-drawn Low-carbon Steel Wire for Concrete Products" JC / T540;

[0009] (4) The performance of the end plate of the H-type revetment pile shall comply with the relevant provisions of the current industry standard "End Plate for Pre-tensioned Prestressed Concrete Pipe Pile" JC / T947, and the material performance of the end plate and the pile sleeve shall comply with the provisions of Q235B in the current national standard "Carbon Structural Steel" GB / T700;

[0010] (5) The reinforcement ratio of the H-type revetment pile shall not be less than 0.5%, the thickness of the longitudinal reinforcement protective layer shall not be less than 40mm, and the concrete strength shall not be less than C60.

[0011] The prior art mainly adopts a direct penetration construction process, that is, first, the H-type revetment pile is aligned with the pile position and kept vertically upright, then the diesel hammer head of the pile driver is used to directly hammer the pile head, the pile body is extruded and the soil is pushed away downward, the pile head is repeatedly hammered until the pile is hammered to the specified depth.

[0012] The main disadvantages of the process are:

[0013] (1) The quality and integrity of the H-type revetment pile body are affected. The pile body will be cracked by directly hammering the pile head with the hammer head, which reduces the service life and strength of the pile;

[0014] (2) The construction efficiency is low. The cross-sectional size of the pre-tensioned prestressed concrete H-type revetment pile is large, with a width of 400mm and a height of 600mm, so the soil resistance is large when it is driven downward, resulting in low construction efficiency. If the hammering force is increased, the damage to the pile body will be increased, and even the pile body will be broken. SUMMARY

[0015] The technical problem to be solved by the present application is to provide a H-type revetment pile construction method, which overcomes the shortcomings of the prior art, improves the construction speed, protects the integrity of the pile body, and provides protection for the construction of artificial wetlands.

[0016] To solve the above technical problems, the technical solution adopted by the present application is:

[0017] A H-type revetment pile construction method, comprising the following steps:

[0018] Step one: drive the construction equipment to the vicinity of the pile position, align the hole guide device with the pile position, and adjust the first and second extension mechanisms to make the hole guide device vertical;

[0019] Step two: drive the lifting mechanism to ensure that the hole guide device slowly and uniformly descends; at the same time, start the high-pressure pump connected to the high-pressure water inlet pipe and start the mud pump connected to the slurry outlet pipe;

[0020] Step three: when the hole guide device slowly and gradually descends, the cutting edge first cuts into the soil, so that the lower end of the high-pressure chamber is blocked; then multiple high-pressure nozzle pipes simultaneously spray high-pressure water flow into the high-pressure chamber, and the high-pressure water flow group instantly cuts the soil in the high-pressure chamber;

[0021] Step four: the cut soil and water in the high pressure chamber are mixed to form mud, which is then led out through multiple suction ports around the high pressure chamber, through suction branch pipes and suction main pipes, thereby completing the output of the soil;

[0022] Step five: the hole leading device continuously descends, and the above steps three to four are repeated until the cutting reaches the specified depth, and then the lifting mechanism is started to lift the hole leading device upward, thereby forming an "H" type hole leading device consistent with the shape of the H type revetment pile;

[0023] Step six: since the clamp on the other side of the construction equipment clamps the H type revetment pile, the movable construction equipment can align the H type revetment pile with the hole leading device, adjust the lifting adjusting mechanism, and send the H type revetment pile into the hole leading device and sink to the bottom, thereby completing the construction of one H type revetment pile;

[0024] Step seven: repeat the above steps one to six until the construction of the H type revetment pile is completed.

[0025] The H type revetment pile construction method has the following technical effects:

[0026] 1) The high pressure water cutting and suction can quickly form an H type hole, which is convenient for directly placing the H type revetment pile without hammering, thereby improving the efficiency and avoiding pile body vibration cracking, prolonging the service life and strength of the pile.

[0027] 2) ① The original soil foundation has been stable after years of deposition. The pile hole size formed by high pressure soil cutting is relatively small, and it is completed in the high pressure chamber. The mud soil on the side wall of the hole will not be cut or washed away under the protection of the cavity shell. The hole will not collapse easily. ② During the hole forming process, the mud on the hole wall forms a mud skin due to the static pressure of the mud on the hole wall, which can effectively prevent the hole wall from collapsing. BRIEF DESCRIPTION OF DRAWINGS

[0028] The application will be further described below in conjunction with the drawings and examples:

[0029] Figure 1 It is a structural schematic diagram of the application.

[0030] Figure 2 It is a schematic diagram of the internal structure of the hole leading device in the application.

[0031] Figure 3 It is a schematic diagram of the external structure of the hole leading device in the application.

[0032] Figure 4 It is a front view of the hole leading device in the application.

[0033] Figure 5It is a bottom view of the hole guide device in the application.

[0034] Figure 6 It is Figure 1 The structural schematic diagram at A in the figure.

[0035] Figure 7 It is the structural schematic diagram of the lifting mechanism.

[0036] In the figure: track chassis 1, mounting plate 2, first telescopic mechanism 3, lifting mechanism 4, crossbeam 5, connecting rod 6, second telescopic mechanism 7, hole guide device 8, high-pressure chamber 8.1, high-pressure nozzle pipe 8.2, water spraying main pipe 8.3, high-pressure water inlet pipe 8.4, slurry suction port 8.5, slurry suction branch pipe 8.6, slurry suction main pipe 8.7, slurry outlet pipe 8.8, knife edge 8.9, shell 8.10, clamp 9, left clamping plate 9.1, right clamping plate 9.2, third telescopic mechanism 9.3, high-pressure pump 10, slurry pump 11. DETAILED DESCRIPTION

[0037] As Figure 1 shown, an H-type revetment pile construction equipment includes a track chassis 1, the track chassis 1 adopts an existing

[0038] universal structure, and a gear on a corresponding rotating shaft can be driven to rotate by a first motor and a second motor, so that the track moves. A hydraulic system and a control box are installed in the middle shell of the track chassis 1, and the control box is wirelessly connected to a remote controller through wireless communication; the movement direction, start and stop of the track and the action of each power mechanism are operated through the remote controller.

[0039] The track drive can reduce the ground pressure of the equipment, facilitate walking on a soft and muddy or uneven construction site, and also avoid subsidence.

[0040] Two groups of lifting adjustment mechanisms are installed on the platform of the track chassis 1 and are arranged left and right; in this way, balance can be maintained, and punching and H-type revetment pile placement can be realized. The lifting adjustment mechanism includes a mounting plate 2 hinged on the track chassis 1, a first telescopic mechanism 3 hinged on the back of the mounting plate 2, and a cylinder body at the other end of the first telescopic mechanism 3 hinged to an ear plate on the platform of the track 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 extension and retraction of the first telescopic mechanism 3. A lifting mechanism 4 is installed on the front of the mounting plate 2, an output end of the lifting mechanism 4 is provided with a crossbeam 5, and the lifting mechanism 4 can drive the crossbeam 5 to move up and down. The other end of the crossbeam 5 is hinged to a connecting rod 6, the connecting rod 6 is fixed with an ear plate, one end of a second telescopic mechanism 7 is hinged to the connecting rod 6 through a pin shaft, and the other end of the second telescopic mechanism 7 is hinged to the crossbeam 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 extension and retraction of the second telescopic mechanism 7.

[0041] The first telescopic mechanism 3 and the second telescopic mechanism 7 are used to adjust the angle of the connecting rod 6.

[0042] The hole guiding device 8 is fixedly connected to the lower end of the lifting adjusting mechanism on the left side, and the hole guiding device 8 is in the shape of "H" in the plan view, and the cross-sectional size of the hole guiding device is slightly smaller than the cross-sectional size of the H-shaped bank protection pile. When the hole is slightly small, the pile can be placed, and the pile body can expand the hole and squeeze the soil to ensure the close connection between the pile and the soil body and improve the stability of the pile. If the hole is slightly large, the pile may swing in the hole after being placed, and is unstable. The hole guiding device 8 is used to guide the hole, and the clamp 9 is fixedly connected to the lower end of the lifting adjusting mechanism on the right side, and the clamp 9 is used to clamp the H-shaped bank protection pile.

[0043] Specifically, the hole guiding device 8 comprises a high-pressure chamber 8.1, the lower end of the high-pressure chamber 8.1 is open, and a knife edge 8.9 is arranged at the opening and gradually shrinks inward from top to bottom. The knife edge 8.9 is beneficial to the cutting of the high-pressure chamber 8.1 into the soil body, and after the cutting of the knife edge 8.9 into the soil body, the high-pressure chamber 8.1 can be relatively closed, which is beneficial to the water spraying and slurry discharging. A plurality of high-pressure nozzle pipelines 8.2 are communicated with the upper end of the high-pressure chamber 8.1, the diameter of the high-pressure nozzle pipeline 8.2 is 0.2-0.5mm, and the water after being pressurized by multiple stages can be sprayed out at a flow rate of 3.7L / min, at this time, the water pressure can reach 380Mpa, and the high-energy water flow can cut the soil in the inner cavity body, and the cut soil and the water in the cavity body are mixed to form slurry. The upper end of the plurality of high-pressure nozzle pipelines 8.2 is connected with a water spraying main pipe 8.3. The water spraying main pipe 8.3 is a chamber structure, the other end of the water spraying main pipe 8.3 is connected with a high-pressure water inlet pipe 8.4, the high-pressure water inlet pipe 8.4 is connected with a high-pressure pump 10 through a connecting pipeline, and the high-pressure water flow is punched by the high-pressure pump 10. A plurality of slurry suction ports 8.5 are installed on the side wall of the high-pressure chamber 8.1, one end of each slurry suction port 8.5 is communicated with the high-pressure chamber 8.1, and the other end is communicated with a slurry suction 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 therewith. The slurry suction branch pipe 8.6 is connected with a slurry suction main pipe 8.7, the slurry suction main pipe 8.7 is a chamber structure, the upper end of the slurry suction main pipe 8.7 is connected with a slurry discharging pipe 8.8, the slurry discharging pipe 8.8 is two groups, and the two groups of slurry discharging pipes 8.8 are finally connected with a slurry pump 11 through a connecting pipeline. The slurry is transported to the slurry suction main pipe 8.7, and then the slurry is output by the two groups of slurry discharging pipes 8.8 and discharged by the slurry pump 11. The high-pressure chamber 8.1 is fixedly connected with an outer shell 8.10, and the outer shell 8.10 is kept in close contact with the hole wall.

[0044] The slurry suction port 8.5 is arranged at the middle position, mainly considering that the slurry at the lower part of the high-pressure chamber 8.1 is relatively thick, the slurry at the upper part contains too much water, and the slurry at the middle part is relatively uniform.

[0045] Specifically, the clamp 9 includes a left clamp plate 9.1 and a right clamp plate 9.2, and the left clamp plate 9.1 and the right clamp plate 9.2 are relatively close or far away through a third telescopic mechanism 9.3. The third telescopic mechanism 9.3 is a hydraulic cylinder, when the third telescopic mechanism 9.3 extends, the left clamp plate 9.1 and the right clamp plate 9.2 are far away, and the H-type revetment pile is released; when the third telescopic mechanism 9.3 retracts, the left clamp plate 9.1 and the right clamp plate 9.2 are close, and the H-type revetment pile is clamped.

[0046] Specifically, the lifting mechanism 4 includes a shell 4.1, a screw rod 4.2 is vertically installed 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 a nut 4.4, the nut 4.4 is installed with a connecting shaft, the connecting shaft is freely connected with a walking wheel 4.5 through a waist hole on the left and right ends of the shell 4.1, and the walking wheel 4.5 is slidably arranged on a guide rail 4.6 and is limited in the guide rail 4.6. When the motor 4.3 is started, the screw rod 4.2 rotates, and then the nut 4.4 moves up and down, and then the cross beam 5 moves up and down.

[0047] An H-type revetment pile construction method, comprising the following steps:

[0048] Step one, H-type revetment pile into the field:

[0049] ①After the H-type revetment pile is stacked in the open environment for 3-7 days, it can be delivered after passing the inspection;

[0050] ②The H-type revetment pile should be hoisted by two fulcrums or two-end-wire hoisting method, the distance between the two fulcrums (two fulcrum method) and the pile end should be 0.2L (L is the length of the pile section), the horizontal angle between the rope and the pile body should not be less than 45°. When loading and unloading, it should be lifted and placed gently, and throwing, collision and rolling are strictly prohibited;

[0051] ③During the transportation of the H-type revetment pile, the fulcrums should meet the positions of the two fulcrum method (the fulcrum distance from the pile end is 0.2L), and the fulcrums should be padded with wedge-shaped fender wood to prevent rolling, and the distance between the layers and the pile end should not be equal to cause misplacement. When the automobile is transported, the stacking layers should not exceed two layers, and if it is guaranteed, it can be appropriately increased;

[0052] ④The H-type revetment pile stacking site should be compacted and leveled, and have drainage measures. The H-type revetment pile stacking should be carried out according to the two fulcrum method, the lowermost fulcrum should be placed on the fender wood, and each fulcrum should be on the same horizontal plane. The pile strength is stipulated. The ground bearing capacity, fender wood and stacking stability are comprehensively analyzed to determine that the stacking layers of the H-type revetment pile should not exceed 8 layers.

[0053] Step two, measurement and setting out: the axis of the diversion dike and each pile position are placed before construction, and the center of the pile position is painted with paint to make the mark obvious. If the construction is carried out in a relatively soft site, the position of the mark will be affected by the walking of the equipment, so after the equipment is basically in place, the pile position should be rechecked.

[0054] Step three, equipment in place: the construction equipment is driven to the vicinity of the pile position, the hole guide device 8 is aligned with the pile position, and the hole guide device 8 is made vertical by adjusting the first telescopic mechanism 3 and the second telescopic mechanism 7; the verticality can be checked by a plumb line.

[0055] Step four, hole guide device falling: the lifting mechanism 4 is driven to ensure that the hole guide device 8 slowly and uniformly descends; at the same time, the high-pressure pump 10 connected with the high-pressure water inlet pipe 8.4 is turned on, and the mud pump 11 connected with the slurry outlet pipe 8.8 is turned on.

[0056] Step five, cutting the soil body: when the hole guide device 8 slowly and gradually descends, the cutting edge 8.9 first cuts into the soil body, so that the lower end of the high-pressure chamber 8.1 is blocked; then the multiple high-pressure nozzle pipes 8.2 simultaneously spray high-pressure water flow into the high-pressure chamber 8.1, and the high-pressure water flow group instantaneously cuts the soil body in the high-pressure chamber 8.1.

[0057] Step six, mud discharge: the cut soil body mixes with the water in the high-pressure chamber 8.1 to form mud, which is then led out through the multiple mud suction ports 8.5 around the high-pressure chamber 8.1, through the mud suction branch pipe 8.6 and the mud suction main pipe 8.7, thereby completing the output of the soil body.

[0058] Step seven, hole forming: the hole guide device 8 continuously descends, and the above steps three to four are repeated until the cutting reaches the specified depth, and then the lifting mechanism 4 is started to lift the hole guide device 8 upward and lead it out, thereby forming an "H" type hole consistent with the outline of the H type revetment pile.

[0059] Step eight, pile sinking: since the clamp 9 on the other side of the construction equipment clamps the H type revetment pile, the construction equipment can be moved at this time, the H type revetment pile is aligned with the hole, the lifting adjustment mechanism is adjusted, the H type revetment pile is sent into the hole, and is sunk to the bottom, thereby completing the construction of one H type revetment pile.

[0060] Step nine: repeat the above steps one to six until the construction of the H type revetment pile is completed.

Claims

1. A method of H-type revetment pile construction by an H-type revetment pile construction apparatus, characterized by: The utility model provides a kind of H type revetment pile construction equipment, the construction equipment includes track chassis (1), two groups of lifting adjusting mechanisms are installed on track chassis (1);Lifting adjusting mechanism includes mounting plate (2) hinged on track chassis (1), first telescopic mechanism (3) is hinged on the back of mounting plate (2), first telescopic mechanism (3) other end cylinder and the platform of track chassis (1) are hinged;First telescopic mechanism (3) telescopic drives mounting plate (2) to rotate in vertical plane;Lifting mechanism (4) is installed on the front of mounting plate (2), the output end of lifting mechanism (4) is installed with crossbeam (5), crossbeam (5) other end is hinged with connecting rod (6), second telescopic mechanism (7) one end is hinged with connecting rod (6), the other end of second telescopic mechanism (7) is hinged with crossbeam (5);Second telescopic mechanism (7) telescopic drives connecting rod (6) to rotate in vertical plane; High-pressure chamber (8.1) lower end opening and the opening is equipped with knife edge (8.9) are arranged in the high-pressure chamber (8.1);Multiple high-pressure nozzle pipelines (8.2) are communicated on the upper end top plate of high-pressure chamber (8.1), and the upper end of high-pressure nozzle pipeline (8.2) is connected with water jet main pipe (8.3), the other end of water jet main pipe (8.3) is connected with high-pressure inlet pipe (8.4), and high-pressure inlet pipe (8.4) is connected with high-pressure pump (10) through connecting pipeline;Multiple suction ports (8.5) are installed on the side wall of high-pressure chamber (8.1), one end of each suction port (8.5) is communicated with high-pressure chamber (8.1), the other end is communicated with suction branch pipe (8.6), suction branch pipe (8.6) is connected with suction main pipe (8.7), and the upper end of suction main pipe (8.7) is connected with slurry outlet pipe (8.8);Slurry outlet pipe (8.8) is connected with mud pump (11) through connecting pipeline; The utility model provides a kind of H type revetment pile construction method, including the following steps: Step one: the construction equipment is walked to the vicinity of stake, and the hole guide device (8) is aligned with stake, and the hole guide device (8) is vertical by adjusting first telescopic mechanism (3) and second telescopic mechanism (7); Step two: driving lifting mechanism (4) ensures that the hole guide device (8) slowly and evenly drops;At the same time, high-pressure pump (10) connected with high-pressure inlet pipe (8.4) is opened, and mud pump (11) connected with slurry outlet pipe (8.8) is opened; Step three: when the hole guide device (8) slowly and gradually drops, knife edge (8.9) first cuts into soil, so that the lower end of high-pressure chamber (8.1) is blocked;Then multiple high-pressure nozzle pipelines (8.2) simultaneously spray high-pressure water flow into high-pressure chamber (8.1), and the soil in high-pressure chamber (8.1) is cut into pieces by high-pressure water flow group instantaneously; Step four: the cut soil mixes with water in high-pressure chamber (8.1) to form mud, and is guided out by multiple suction ports (8.5) around high-pressure chamber (8.1), and is guided away by suction branch pipe (8.6) and suction main pipe (8.7), so that the output of soil is completed. Step five: the hole guiding device (8) is continuously lowered, and the above steps three-four are repeated until the cutting reaches the specified depth, and then the lifting mechanism (4) is started to lift the hole guiding device (8) upward to guide out, thereby forming a "H" type hole guiding device consistent with the shape of the H type revetment pile; Step six: since the clamp (9) on the other side of the construction equipment clamps the H type revetment pile, at this time the movable construction equipment can be used to align the H type revetment pile with the hole, adjust the lifting adjusting mechanism, and send the H type revetment pile into the hole and sink to the bottom, thereby completing the construction of one H type revetment pile; Step seven: the above steps one-six are repeated until the construction of the H type revetment pile is completed.

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