Drainage precast support pile wall structure and construction method thereof

Abstract

The application discloses a drainage prefabricated support pile wall structure and a construction method thereof. The drainage prefabricated support pile wall structure comprises a plurality of support piles arranged in rows, a drainage cavity is arranged between two adjacent support piles, a water-permeable material is filled in the drainage cavity, and the water-permeable material can block soil and allow water to permeate. The application can play a role of supporting and retaining soil and can realize the function of water exchange between a river bank and a water area.

Description

Technical Field

[0001] This invention relates to the field of support pile technology, and in particular to a precast drainage support pile wall structure and its construction method. Background Technology

[0002] Currently, precast piles are commonly used precast components in pile foundation bearing, foundation pit protection, and hydraulic retaining systems, and increasingly, multi-functional pile types are emerging. However, in hydraulic revetment projects, most existing precast retaining piles only consider the requirements of the slope and bank retaining soil, neglecting ecological requirements. Specifically, precast retaining piles completely isolate the banks from the water surface to a certain area below the riverbed, or only provide small, transverse plastic drainage pipes. During the rainy season, this is insufficient to meet the requirements for rapid surface drainage, significantly increasing the likelihood of flooding on both banks. Even if precast retaining piles are spaced out, while rapid drainage may be possible, the continuous erosion and removal of soil by the water will eventually create voids below the road surface, leading to road cracking and even subsidence. Furthermore, when soil flows through the gaps between the piles into the water, it will pollute the water and the exterior of the retaining structure. Similarly, when the water level in a water area rises rapidly, the water cannot quickly pass through the "concrete barrier" formed by the precast support piles and cannot quickly replenish the groundwater on both banks. The water level in the river will rise rapidly and eventually "cross" the support pile barrier, causing the river water to flood both banks. Summary of the Invention

[0003] This invention provides a precast drainage support pile wall structure and its construction method, which can serve as a support and retaining wall, and also enable water exchange between the riverbank and the water area.

[0004] To solve the above problems, the present invention adopts the following technical solution:

[0005] According to a first aspect of the present invention, an embodiment of the present invention provides a precast drainage support pile wall structure, comprising multiple support piles arranged in a row, a drainage cavity being provided between two adjacent support piles, the drainage cavity being filled with a permeable material, the permeable material being able to block soil while allowing water to pass through.

[0006] In some embodiments, grooves extending along the length of the support pile are provided on both sides of the support pile, and the drainage cavity is located between the inner walls of the two grooves of two adjacent support piles that are close to each other.

[0007] In some embodiments, the permeable material includes a permeable pipe and a filter material covering the permeable pipe. The two ends of the permeable pipe are closed, and the surface of the permeable pipe is densely covered with multiple permeable holes. The filter material is used to filter the underground soil.

[0008] According to a second aspect of the present invention, embodiments of the present invention provide a construction method for the precast drainage support pile wall structure described in the first aspect above, comprising the following steps:

[0009] (1) Drive the first support pile to the design elevation;

[0010] (2) Install the detachable forming device of the drainage cavity on one side of the next support pile, and a part of the detachable forming device of the drainage cavity is embedded in the groove on the side of the support pile.

[0011] (3) Align the groove of the detachable forming device with drainage cavity of the next support pile with the groove of the previous support pile that has been driven, and use the pile driving equipment to drive the next support pile to the design elevation. The detachable forming device with drainage cavity is driven into the soil along with the pile, and another part of the detachable forming device with drainage cavity is embedded in the groove of the previous support pile.

[0012] (4) Remove the detachable forming device of the drainage cavity from the support pile, connect the puller to the detachable forming device of the drainage cavity, and then lift the puller upward so that the detachable forming device of the drainage cavity is pulled out from between the two adjacent support piles. The cavity formed between the inner walls of the two grooves of the two adjacent support piles is the drainage cavity.

[0013] (5) Fill the drainage cavity with permeable material;

[0014] (6) Cast a reinforced concrete cap beam on top of the support piles.

[0015] In some embodiments, the detachable forming device for the drainage cavity includes a connecting plate, a connecting rod, and a plurality of forming elements. The upper end of the connecting rod is connected to one side of the connecting plate, and the connecting rod extends downward toward the connecting plate. The forming elements are fixed on the connecting rod and distributed along the axial direction of the connecting rod.

[0016] Step (2) specifically involves fixing the connecting plate to the top surface of the support pile, so that the connecting rod and the forming part are located on one side of the support pile, and a part of the forming part is embedded in the groove on the side of the support pile; the other part of the detachable forming device of the drainage cavity is embedded in the groove of the previous support pile, specifically: the other part of the forming part is embedded in the groove on the side of the support pile.

[0017] In some embodiments, the bottom surface of the connecting plate is provided with a plurality of positioning elements; the step of fixing the connecting plate to the top surface of the support pile specifically includes: inserting the positioning elements into the central hole of the support pile, placing the connecting plate on the top surface of the support pile, and then using bolts to pass through the through holes on the surface of the connecting plate and fix it in the tension bolt holes reserved on the top surface of the support pile.

[0018] In some embodiments, one of the molded parts is located at the bottom of the connecting rod, the top surface of the molded part is connected to the connecting rod, and the bottom surface of the molded part is set to be tapered.

[0019] In some embodiments, the puller is provided with a lifting hole, and the puller is also provided with a first clamping groove and a second clamping groove that extend laterally through itself. The first clamping groove is located above the second clamping groove, the upper end of the second clamping groove is connected to the first clamping groove, and the lower end of the second clamping groove extends downward to the bottom surface of the puller. The width of the second clamping groove is smaller than the width of the first clamping groove.

[0020] The step of connecting the puller to the detachable forming device of the drainage cavity specifically includes: inserting the connecting plate into the first clamping groove of the puller.

[0021] In some embodiments, the puller includes a first puller plate and a second puller plate that are detachably combined. Both the first puller plate and the second puller plate are provided with a lifting hole and a first clamping groove that are mated to each other. The first puller plate has a first protrusion below one end of the first clamping groove and a first notch below the other end of the first clamping groove. The second puller plate has a second protrusion below one end of the first clamping groove and a second notch below the other end of the first clamping groove. When the first puller plate and the second puller plate are combined, the first puller plate is in close contact with the second puller plate, the first protrusion is inserted into the second notch, the second protrusion is inserted into the first notch, and the second protrusion forms the second clamping groove between the first protrusion and the second protrusion.

[0022] The present invention has at least the following beneficial effects: The present invention provides a drainage cavity between two adjacent support piles, and the drainage cavity is filled with a permeable material. Since the permeable material can block the soil and allow water to pass through, when there is a water pressure difference between the riverbank and the water area, the water can pass through the permeable material, while the soil cannot pass through the permeable material. Therefore, the entire precast drainage support pile wall structure can play the role of supporting and retaining soil, and can also realize the exchange of water between the riverbank and the water area. Attached Figure Description

[0023] Figure 1 This is a schematic diagram of a precast drainage support pile wall structure according to an embodiment of the present invention;

[0024] Figure 2 This is a top view schematic diagram of a precast drainage support pile wall structure according to an embodiment of the present invention;

[0025] Figure 3 This is a partial construction diagram illustrating the construction method of a precast drainage support pile wall structure according to an embodiment of the present invention.

[0026] Figure 4 This is a partial construction diagram illustrating the construction method of a precast drainage support pile wall structure according to an embodiment of the present invention.

[0027] Figure 5 This is a partial construction diagram illustrating the construction method of a precast drainage support pile wall structure according to an embodiment of the present invention.

[0028] Figure 6 This is a partial construction diagram illustrating the construction method of a precast drainage support pile wall structure according to an embodiment of the present invention.

[0029] Figure 7 This is a partial construction diagram illustrating the construction method of a precast drainage support pile wall structure according to an embodiment of the present invention.

[0030] Figure 8 This is a partial construction diagram illustrating the construction method of a precast drainage support pile wall structure according to an embodiment of the present invention.

[0031] Figure 9 This is a partial construction diagram illustrating the construction method of a precast drainage support pile wall structure according to an embodiment of the present invention.

[0032] Figure 10 This is a partial construction diagram illustrating the construction method of a precast drainage support pile wall structure according to an embodiment of the present invention.

[0033] Figure 11 This is a schematic diagram of the structure of a detachable forming device for a drainage cavity according to an embodiment of the present invention.

[0034] Figure 12 This is a bottom view schematic diagram of a detachable forming device for a drainage cavity according to an embodiment of the present invention;

[0035] Figure 13 This is a schematic diagram of the structure of a detachable forming device for a drainage cavity fixed on a support pile according to an embodiment of the present invention.

[0036] Figure 14 This is a top view schematic diagram of a detachable forming device for a drainage cavity according to an embodiment of the present invention, fixed on a support pile.

[0037] Figure 15 This is a schematic diagram of the structure of a puller according to an embodiment of the present invention;

[0038] Figure 16 This is a schematic diagram illustrating the usage state of a puller according to an embodiment of the present invention;

[0039] Figure 17 This is a schematic diagram of the structure of the first puller plate according to an embodiment of the present invention;

[0040] Figure 18This is a schematic diagram of the structure of the second puller plate according to an embodiment of the present invention.

[0041] The attached figures are labeled as follows:

[0042] Support pile 100, center hole 101, groove 102, drainage cavity 103, cap beam 110;

[0043] Permeable material 200, permeable pipe 210, filter material 220, sealing material 230;

[0044] The detachable forming device 300 for the drainage cavity includes a connecting plate 310, a first connecting plate 311, a second connecting plate 312, a connecting rod 320, a forming part 330, and a positioning part 340.

[0045] Puller 400, lifting hole 401, first clamping groove 402, second clamping groove 403, first puller plate 410, first protrusion 411, first notch 412, second puller plate 420, second protrusion 421, second notch 422. Detailed Implementation

[0046] This disclosure provides the following description with reference to the accompanying drawings to aid in a full understanding of the various embodiments of the disclosure as defined by the claims and their equivalents. The description includes various specific details to aid understanding, but these details should be considered exemplary only. Therefore, those skilled in the art will recognize that various changes and modifications can be made to the various embodiments described herein without departing from the scope and spirit of this disclosure. Furthermore, for clarity and brevity, descriptions of the functions and constructions of the disclosure may be omitted.

[0047] The terms and words used in the following description and claims are not limited to their literal meaning, but are merely used by the inventors to enable a clear and consistent understanding of this disclosure. Therefore, it will be clear to those skilled in the art that the following description of various embodiments of this disclosure is provided for illustrative purposes only, and not to limit the disclosure as defined by the appended claims and their equivalents.

[0048] The terms “having,” “may have,” “comprising,” or “may include” as used in the various embodiments of this disclosure indicate the presence of the corresponding functions, operations, elements, etc., disclosed, but do not limit one or more additional functions, operations, elements, etc. Furthermore, it should be understood that the terms “comprising” or “having” as used in the various embodiments of this disclosure are intended to indicate the presence of features, numbers, operations, elements, components, or combinations thereof described in the specification, but do not exclude the presence or addition of one or more other features, numbers, operations, elements, components, or combinations thereof.

[0049] It should be understood that when an element (e.g., the first element) is “connected” to another element (e.g., the second element), the element can be directly connected to the other element, or there can be an intermediary element (e.g., the third element) between the element and the other element.

[0050] Embodiments of the present invention provide a precast drainage support pile wall structure, such as... Figure 1 and Figure 2 As shown, the structure includes multiple support piles 100 arranged in a row. A preset distance is naturally required between adjacent support piles 100 (this preset distance is determined by those skilled in the art based on actual conditions) to form a drainage cavity between adjacent support piles 100. Water can flow from one side of the wall structure formed by the support piles 100 to the other side through the drainage cavity. The drainage cavity is filled with a permeable material 200, which can block soil while allowing water to pass through.

[0051] Therefore, when there is a pressure difference between the groundwater and the water area on the riverbank, the water can pass through the permeable material 200, while the soil cannot pass through the permeable material 200. Thus, the entire precast drainage support pile wall structure can play the role of supporting and retaining soil to prevent soil loss. At the same time, it can also drain water and realize the exchange of water between the riverbank and the water area.

[0052] In this embodiment, the drainage cavity can extend from the top surface of the support pile 100 to a preset height below the riverbed to form a vertically continuous drainage channel. Correspondingly, the permeable material 200 also extends from the top surface of the support pile 100 to a preset height below the riverbed. At the same time, since there are multiple support piles 100, the number and density of drainage cavities are large. While ensuring the supporting function of the support piles and effectively preventing soil loss, the drainage efficiency can be greatly improved, achieving the effect of rapid drainage.

[0053] In some embodiments, grooves 102 extending along the length of the support pile 100 are provided on both sides of the support pile 100. The drainage cavity is located between the inner walls of the two grooves 102 of two adjacent support piles 100 that are close to each other. Therefore, the two grooves 102 of two adjacent support piles 100 that are close to each other also constitute part of the drainage cavity. The drainage cavity can be formed by squeezing soil in the soil using a detachable forming device 300 for the drainage cavity. A part of the detachable forming device 300 for the drainage cavity is embedded in the groove 102. The inner wall of the groove 102 can limit the detachable forming device 300 for the drainage cavity to a certain extent, so that the detachable forming device 300 for the drainage cavity is not easy to shake during the pile driving process, which facilitates pile driving and forms a more uniform drainage cavity. At the same time, after the pile is driven, the side wall of the support pile 100 that forms the groove 102 can act as a retaining wall, reducing the amount of soil entering the drainage cavity.

[0054] In some embodiments, the cross-sectional shape of the drainage cavity is circular, and the groove 102 is configured as an arc shape adapted to the drainage cavity. The circular structure facilitates soil squeezing and can also be adapted to the permeable pipe for easy insertion.

[0055] In some embodiments, the permeable material 200 includes a permeable pipe 210 and a filter material 220 surrounding the permeable pipe 210. Both ends of the permeable pipe 210 are sealed to prevent impurities such as soil from entering and clogging it. Multiple permeable holes are densely distributed on the surface of the permeable pipe 210, allowing water to enter the pipe from one side and then pass through the other side, thus facilitating water exchange. The filter material 220 filters the underground soil, preventing it from entering the permeable holes and clogging the permeable pipe 210.

[0056] The filter material 220 can be made of non-woven fabric, which is more durable. The permeable pipe 210 can be a closed structure at both ends during manufacturing, or it can be a structure with at least one end open during manufacturing, and then a closed structure at both ends is formed by filling the opening with sealing material later.

[0057] In some embodiments, a central hole 101 extending along the length direction of the support pile 100 may be provided at the center of the support pile 100 to reduce the material used in the support pile 100 without affecting its support performance.

[0058] An embodiment of the present invention also provides a construction method for the precast drainage support pile wall structure described in the above embodiments, comprising the following steps:

[0059] (1) Drive the first support pile to the design elevation;

[0060] like Figure 3 As shown, the first support pile 100 is driven into the soil of the river channel until the support pile 100 reaches the design elevation; during the pile driving process, the support pile 100 should be kept basically vertical to avoid the support pile 100 from tilting.

[0061] (2) Install the detachable forming device of the drainage cavity on one side of the next support pile, and a part of the detachable forming device of the drainage cavity is embedded in the groove on the side of the support pile.

[0062] like Figure 4As shown, the detachable forming device 300 of the drainage cavity is set on one side of the next support pile 100. The detachable installation structure is adopted so that the detachable forming device 300 of the drainage cavity can be separated from the support pile 100, so that the detachable forming device 300 of the drainage cavity can be pulled out of the soil later. The inner wall of the groove can play a certain limiting role for the detachable forming device 300 of the drainage cavity, so that the detachable forming device 300 of the drainage cavity is not easy to shake during the pile driving process, which facilitates pile driving and forms a more neat drainage cavity.

[0063] (3) Align the groove of the detachable forming device with drainage cavity of the next support pile with the groove of the previous support pile that has been driven, and use the pile driving equipment to drive the next support pile to the design elevation. The detachable forming device with drainage cavity is driven into the soil along with the pile, and another part of the detachable forming device with drainage cavity is embedded in the groove of the previous support pile.

[0064] like Figure 4 As shown, the groove of the detachable forming device 300 with a drainage cavity embedded in the next support pile 100 is aligned with the groove of the previous driven support pile 100. Even if the two grooves are opposite each other, this ensures that the other part of the detachable forming device of the drainage cavity is embedded in the groove of the previous support pile. When the detachable forming device 300 of the drainage cavity begins to contact the ground, it is necessary to ensure that the detachable forming device 300 of the drainage cavity is close to the inner wall of the groove of the driven pile. As the detachable forming device 300 of the drainage cavity continues to enter the soil, it will continuously squeeze out the soil remaining in the grooves of the driven pile and the pile to be driven. If, during the pile driving process, the pile to be driven tilts, with the lower end gradually moving away from the driven pile and the upper end gradually approaching the driven pile, the detachable forming device 300 of the drainage cavity will contact the driven pile first, preventing the pile to be driven from getting too close to the driven pile, thus ensuring that the cavity space of the drainage cavity is not compressed or occupied. This ultimately forms a shape like... Figure 5 The structure shown.

[0065] (4) Remove the detachable forming device of the drainage cavity from the support pile, connect the puller to the detachable forming device of the drainage cavity, and then lift the puller upward so that the detachable forming device of the drainage cavity is pulled out from between the two adjacent support piles. The cavity formed between the inner walls of the two grooves of the two adjacent support piles is the drainage cavity.

[0066] like Figure 6As shown, the puller 400 can be lifted using hoisting equipment, or by clamping the puller 400 with clamping equipment and pulling it upwards. During lifting, ensure that the detachable forming device 300 of the drainage cavity is slowly pulled upwards in a vertical direction to avoid it hitting the side wall of the support pile 100 and causing damage. During the process of the detachable forming device 300 of the drainage cavity being pulled away from the soil, it will carry away any remaining soil in the drainage cavity, ensuring that there is no soil or only a very small amount of soil remaining in the drainage cavity. Figure 7 As shown, after the detachable forming device of the drainage cavity is pulled out, the cavity formed between the inner walls of the two grooves of two adjacent support piles 100 that are close to each other is the drainage cavity 103.

[0067] When there is still a lot of soil remaining in the drainage cavity 103 or when it is not possible to immediately fill it with permeable material, other equipment such as excavators can be used to reinsert the detachable forming device 300 of the drainage cavity 103 into the drainage cavity 103, so as to push the soil in the drainage cavity 103 downward or remove it from the ground, thereby ensuring that the drainage cavity 103 is not occupied by soil.

[0068] (5) Fill the drainage cavity with permeable material;

[0069] like Figure 9 As shown, the permeable material 200 can be gradually buried into the drainage cavity from the top opening of the drainage cavity, and it is ensured that there is no gap between the permeable material 200 and the inner wall of the drainage cavity or the gap is smaller than the preset gap.

[0070] (6) Cast a reinforced concrete cap beam on top of the support piles.

[0071] like Figure 10 As shown, if the permeable material 200 extends beyond the top of the support pile 100, this portion can be cut off, and then a reinforced concrete cap beam can be poured to form the precast drainage support pile wall structure of the present invention.

[0072] In this embodiment, after completing step (4), steps (2)-(4) can be repeated multiple times, such as Figure 8 As shown, multiple support piles 100 are driven in, and then steps (5) and (6) are performed on the driven piles. The number of times steps (2)-(4) are repeated depends on the speed at which the soil is squeezed into the drainage cavity. Since the soil fluidity, groundwater level and vibration generated during the pile driving process are relatively complex, it is best to perform the subsequent steps of step (4) as soon as possible after completing step (4).

[0073] In some embodiments, such as Figure 11As shown, the detachable forming device for the drainage cavity includes a connecting plate 310, a connecting rod 320, and multiple forming elements 330. The upper end of the connecting rod 320 is connected to one side of the connecting plate 310, and the connecting rod 320 extends downwards from the connecting plate 310. The forming elements 330 are fixed to the connecting rod 320 and distributed along the axial direction of the connecting rod 320. The forming elements 330 are used to squeeze soil and can bring out soil when pulled out of the soil.

[0074] The shape and size of the connecting plate 310 can be adjusted according to the end face shape of the support pile. It not only serves to fix the connecting rod 320 and the forming part 330, but also effectively reduces the damage of the hammer to the pile head during the pile driving process and ensures the integrity of the pile body. The cross-sectional shape and size of the forming part 330 naturally need to match the cross-sectional shape and size of the drainage cavity. Multiple forming parts 330 can occupy as much space as possible in the drainage cavity and reduce the amount of soil entering the drainage cavity. At the same time, when the pile body tilts during construction, the connecting rod 320 and the forming part 330 can also prevent the later pile from getting too close to the already driven pile, ensuring that there is enough space between adjacent support piles to form a drainage cavity.

[0075] The connecting plate 310 and the connecting rod 320 can be perpendicular to each other to ensure that the connecting rod 320 can be basically in a vertical state; the connecting plate 310 and the connecting rod 320 can be connected as one piece, which is convenient for manufacturing and can also strengthen the connection between the two.

[0076] Correspondingly, such as Figure 13 As shown, step (2) of the above embodiment is specifically as follows: the connecting plate 310 is fixed to the top surface of the support pile 100, so that the connecting rod 320 and the forming part 330 are located on one side of the support pile 100, and a part of the forming part 330 is embedded in the groove on the side of the support pile 100. During the pile driving process, the connecting rod 320 and the forming part 330 are driven into the soil along with the pile. The forming part 330 can squeeze out the soil in the drainage cavity to initially form the drainage cavity. After the entire detachable forming device of the drainage cavity is pulled out, the forming part 330 carries out the soil remaining in the drainage cavity, thereby forming the drainage cavity.

[0077] In step (4) of the above embodiment, the step of embedding another part of the detachable forming device of the drainage cavity in the groove of the previous support pile is specifically: the other part of the forming part is embedded in the groove on the side of the support pile. This ensures that a drainage cavity is formed between the inner walls of the two grooves of two adjacent support piles that are close to each other.

[0078] In some embodiments, when the cross-section of the drainage cavity is circular, the forming member 330 is configured as a cylinder with an outer diameter larger than that of the connecting rod 320, and the forming member 330 is sleeved on the connecting rod 320 to form a drainage cavity with a circular cross-section. The circular structure also facilitates soil extrusion and is compatible with the permeable pipe, making it easy to insert the permeable pipe. The forming member 330 can be integrally connected to the connecting rod 320, which facilitates manufacturing and strengthens the connection between the two. The forming member 330 can also be evenly distributed on the connecting rod 320 to better remove soil and improve the forming effect of the drainage cavity.

[0079] Furthermore, one of the forming parts 330 is located at the bottom of the connecting rod 320. The top surface of the forming part 330 located at the bottom of the connecting rod 320 is connected to the connecting rod 320, and the bottom surface of the forming part 330 located at the bottom of the connecting rod 320 is set as a cone. This cone structure naturally needs to be adapted to the cross-sectional shape and size of the drainage cavity. The cone design can reduce the pressure of the forming part 330 in contact with the soil, which is more conducive to driving the forming part 330 to squeeze out the soil in the drainage cavity during the downward pile driving process.

[0080] Meanwhile, during the pile driving process, if the pile body tilts and causes the forming part 330 below the connecting rod 320 to touch the inner wall of the already driven groove, since the bottom surface of the forming part 330 is conical, the conical surface can break the soil and squeeze out the soil in the already driven groove, while forcing the entire detachable forming device of the drainage cavity and the subsequent pile to shift in the opposite direction, thereby achieving the purpose of soil drainage and cavity formation and correcting the verticality of the pile body after driving.

[0081] In some embodiments, the bottom surface of the connecting plate 310 is provided with a plurality of positioning elements 340 for positioning the connecting plate 310 on the support pile.

[0082] In step (2) of the above embodiment, the step of fixing the connecting plate to the top surface of the support pile specifically includes: inserting the positioning piece into the center hole of the support pile, placing the connecting plate on the top surface of the support pile, and then using bolts to pass through the through holes on the surface of the connecting plate and fix it in the tension bolt hole reserved on the top surface of the support pile.

[0083] The positioning component 340 positions the connecting plate 310, facilitating its quick and accurate placement onto the top surface of the support pile. Bolt fixing enables a detachable connection between the connecting plate 310 and the support pile, offering advantages such as simple operation and ease of construction.

[0084] Furthermore, such as Figure 12 and 14 As shown, the positioning member 340 is an arc shape that matches the center hole 101 of the support pile 100. The positioning member 340 can be inserted into the center hole 101 and abut against the inner wall of the center hole 101 to position the connecting plate 310.

[0085] In some embodiments, such as Figure 15 As shown, the puller 400 is provided with a lifting hole 401 to facilitate the passage of a lifting rope or the hooking of a lifting hook, thereby lifting the puller 400. The puller 400 is also provided with a first clamping groove 402 and a second clamping groove 403 that extend laterally through itself. The first clamping groove 402 is located above the second clamping groove 403. The upper end of the second clamping groove 403 communicates with the first clamping groove 402, and the lower end of the second clamping groove 403 extends downward to the bottom surface of the puller 400. The width of the second clamping groove 403 is smaller than the width of the first clamping groove 402, so that the connecting plate can be clamped, and the connecting plate will not separate from the puller 400 through the second clamping groove 402. The first clamping groove 402 is used to clamp the connecting plate, and its width is adapted to the connecting plate. The connecting plate is inserted into the first clamping groove 402. The second clamping groove 403 is used to clamp the connecting rod to enhance the stability of the clamping.

[0086] In step (4) of the above embodiment, the step of connecting the puller to the detachable forming device of the drainage cavity specifically includes: inserting the connecting plate into the first clamping groove of the puller so that the first clamping groove of the puller clamps the connecting plate.

[0087] Furthermore, such as Figure 12 and Figure 16 As shown, since the connecting plate 310 is located on the top surface of the support pile, and the connecting rod 320 is located on the side surface of the support pile, the connecting plate 310 needs to have a portion extending beyond the outer side of the top surface of the support pile. Therefore, in this embodiment, the connecting plate 310 includes a first connecting plate 311 and a second connecting plate 312 connected to the first connecting plate 311. The first connecting plate 311 is fixed to the top surface of the support pile, and the second connecting plate 312 extends to the outer side of the support pile. The connecting rod 320 is located below the second connecting plate 312 and connected to it. The size of the second connecting plate 312 can be designed to be smaller than that of the first connecting plate 311, thus saving manufacturing costs. The first clamping groove is used to clamp the second connecting plate 312, allowing the puller 400 to be made smaller.

[0088] In some embodiments, such as Figure 15 , Figure 17 and Figure 18As shown, the extraction tool 400 includes a first extraction plate 410 and a second extraction plate 420 that are detachably assembled together. Both the first extraction plate 410 and the second extraction plate 420 are provided with lifting holes 401 and first clamping grooves 402 that are connected to each other. That is, the lifting hole 401 on the first extraction plate 410 is connected to the lifting hole 401 on the second extraction plate 420, and the first clamping groove 402 on the first extraction plate 410 is connected to the first clamping groove 402 on the second extraction plate 420. When the first extraction plate 410 and the second extraction plate 420 are assembled together, the lifting hole 401 and the first clamping groove 402 of the entire extraction tool 400 are formed.

[0089] A first protrusion 411 is provided on the first puller plate 410 below one end of the first clamping groove 402, and a first notch 412 is provided on the first puller plate 410 below the other end of the first clamping groove 402. A second protrusion 421 is provided on the second puller plate 420 below one end of the first clamping groove 402, and a second notch 422 is provided on the second puller plate 420 below the other end of the first clamping groove 402. When the first puller plate 410 and the second puller plate 420 are combined, the first puller plate 410 is in close contact with the second puller plate 420, the first protrusion 411 is inserted into the second notch 422, the second protrusion 421 is inserted into the first notch 412, and a second clamping groove 403 is formed between the first protrusion 411 and the second protrusion 421.

[0090] Because of the detachable structure, the first extraction plate 410 and the second extraction plate 420 can be separated first, and then the first extraction plate 410 and the second extraction plate 420 can be adjusted from both sides of the connecting plate so that the connecting plate is inserted into place. Then the first extraction plate 410 and the second extraction plate 420 can be combined together to easily clamp the connecting plate. After the first extraction plate 410 and the second extraction plate 420 are separated, the connecting plate can also easily detach from the first clamping groove 402.

[0091] The first puller plate 410 and the second puller plate 420 can be detachably connected together using bolts.

[0092] The above description, in conjunction with specific embodiments, provides a further detailed explanation of the present invention, but it should not be construed as limiting the specific implementation of the invention to these descriptions. For those skilled in the art, several simple deductions or substitutions can be made without departing from the concept of the present invention.

Claims

1. A construction method for a precast drainage support pile wall structure, characterized in that, The precast drainage support pile wall structure includes multiple support piles arranged in rows, with a drainage cavity between two adjacent support piles. The drainage cavity is filled with a permeable material that can block soil while allowing water to pass through. Grooves extending along the length of each support pile are provided on both sides, and the drainage cavity is located between the inner walls of two closely spaced grooves on two adjacent support piles. The structure includes the following steps: (1) Drive the first support pile to the design elevation; (2) Install the detachable forming device of the drainage cavity on one side of the next support pile, and a part of the detachable forming device of the drainage cavity is embedded in the groove on the side of the support pile. (3) Align the groove of the detachable forming device with drainage cavity of the next support pile with the groove of the previous support pile that has been driven, and use the pile driving equipment to drive the next support pile to the design elevation. The detachable forming device with drainage cavity is driven into the soil along with the pile, and another part of the detachable forming device with drainage cavity is embedded in the groove of the previous support pile. (4) Remove the detachable forming device of the drainage cavity from the support pile, connect the puller to the detachable forming device of the drainage cavity, and then lift the puller upward so that the detachable forming device of the drainage cavity is pulled out from between the two adjacent support piles. The cavity formed between the inner walls of the two grooves of the two adjacent support piles is the drainage cavity. (5) Fill the drainage cavity with permeable material; (6) Pour a reinforced concrete cap beam on top of the support piles; The detachable forming device for the drainage cavity includes a connecting plate, a connecting rod, and multiple forming parts. The upper end of the connecting rod is connected to one side of the connecting plate, and the connecting rod extends downward toward the connecting plate. The forming parts are fixed on the connecting rod and distributed along the axial direction of the connecting rod. Step (2) specifically involves fixing the connecting plate to the top surface of the support pile, so that the connecting rod and the forming part are located on one side of the support pile, and a part of the forming part is embedded in the groove on the side of the support pile; the other part of the detachable forming device of the drainage cavity is embedded in the groove of the previous support pile, specifically: the other part of the forming part is embedded in the groove on the side of the support pile.

2. The construction method according to claim 1, characterized in that, The bottom surface of the connecting plate is provided with several positioning components; the step of fixing the connecting plate to the top surface of the support pile specifically includes: inserting the positioning components into the central hole of the support pile, placing the connecting plate on the top surface of the support pile, and then using bolts to pass through the through holes on the surface of the connecting plate and fix it in the tension bolt holes reserved on the top surface of the support pile.

3. The construction method according to claim 1 or 2, characterized in that: One of the molded parts is located at the bottom of the connecting rod. The top surface of the molded part is connected to the connecting rod, and the bottom surface of the molded part is set to be conical.

4. The construction method according to claim 1, characterized in that, The puller is provided with a lifting hole. The puller is also provided with a first clamping groove and a second clamping groove that penetrates it laterally. The first clamping groove is located above the second clamping groove. The upper end of the second clamping groove is connected to the first clamping groove, and the lower end of the second clamping groove extends downward to the bottom surface of the puller. The width of the second clamping groove is smaller than the width of the first clamping groove. The step of connecting the puller to the detachable forming device of the drainage cavity specifically includes: inserting the connecting plate into the first clamping groove of the puller.

5. The construction method according to claim 4, characterized in that, The extraction tool includes a first extraction plate and a second extraction plate that are detachably combined. Both the first and second extraction plates are provided with lifting holes and a first clamping groove that are mated to each other. A first protrusion is provided on the first extraction plate below one end of the first clamping groove, and a first notch is provided on the first extraction plate below the other end of the first clamping groove. A second protrusion is provided on the second extraction plate below one end of the first clamping groove, and a second notch is provided on the second extraction plate below the other end of the first clamping groove. When the first and second extraction plates are combined, the first extraction plate is in close contact with the second extraction plate, the first protrusion is inserted into the second notch, the second protrusion is inserted into the first notch, and the second protrusion forms the second clamping groove between the first and second protrusions.

6. The construction method according to claim 1, characterized in that: The permeable material includes a permeable pipe and a filter material that wraps the permeable pipe. The two ends of the permeable pipe are closed, and the surface of the permeable pipe is densely covered with multiple permeable holes. The filter material is used to filter the underground soil.

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