Anti-clogging drainage precast pile and construction method thereof

Abstract

The utility model provides an anti-clogging drainage precast pile, which comprises a pile body, a pile tip, a sleeve and a pile cap, the bottom of the pile body is coaxially fixed with the pile tip, the outside of the pile body is slidably sleeved with the sleeve, the top of the pile body is coaxially buckled with the pile cap, a plurality of grooves are formed on the outer wall of the pile body, which are circumferentially and axially through the pile body, the bottom of the sleeve is supported on the top surface of the pile tip, the top of the sleeve is supported in the pile cap, a drainage belt is laid on the inner wall of the grooves, a plurality of plug holes are formed on the inner wall of the grooves, water-soluble plugs are fixedly inserted in the plug holes, and the middle part of the water-soluble plugs penetrates the drainage belt. The anti-clogging drainage precast pile combines the bearing capacity and drainage capacity of the pile foundation, lays the drainage belt in the grooves of the pile body and fixes the drainage belt, thereby providing a novel pressure-reducing drainage precast pile and a construction process thereof. The anti-clogging drainage precast pile has higher strength and rigidity than the pervious concrete pile and has the function of pressure reduction and drainage, can accelerate the consolidation of the foundation, can shorten the construction period, and can avoid the problem of environmental pollution.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of pile pressing construction, in particular to a silt-preventing drainage prefabricated pile and a construction method thereof. BACKGROUND

[0002] With the development of society, the application of reinforced concrete prefabricated piles is more and more widely used in foundation design and construction. However, the excess pore water pressure caused by soil squeezing effect during pile pressing construction has been a problem for engineers. After the pile is pressed, the soil squeezing effect of the pile body will generate excess pore water pressure in the surrounding soil. During normal construction, the pore water pressure around the pile dissipates slowly, and after the soil is consolidated, the pile side may be subjected to downward negative skin friction, thereby reducing the bearing capacity of the pile. Therefore, in order to reduce the negative effects caused by the soil squeezing effect of the prefabricated pile during construction, it is necessary to reduce the excess pore water pressure caused by the soil squeezing effect during construction and speed up its dissipation. Therefore, the drainage effect of the foundation during construction is directly related to the quality of the pile pressing, and therefore it is particularly urgent to develop a prefabricated pile that can both bear and drain.

[0003] Through patent retrieval, the following comparison files are found:

[0004] CN109914384A discloses a new type of pressure-reducing drainage prefabricated pile and a construction method, which comprises a new type of reinforced concrete prefabricated pile formed by template pile forming, the surface of which is provided with a groove along the axial direction of the pile body, and a plastic drainage belt is laid in the groove and fixed by steel bars. The bottom end of the drainage belt of the first pile body is provided with a connecting ring, and a hook is arranged at the top of the pile tip of the prefabricated pile, which is hung on the connecting ring to fix the drainage belt and prevent it from falling off during pile pressing. This new type of prefabricated pile can dissipate the excess pore water pressure generated during and after pile pressing through the drainage belt to accelerate the consolidation of the foundation.

[0005] Through analysis, the above-mentioned published patent is the applicant's previous research and development achievement, and there are many defects compared with the present application: 1. The soil resistance is easy to damage the drainage belt when the pile body is pressed into the soil, which seriously affects the drainage and pressure reduction effect; 2. The drainage belt cannot be taken out and can only be left in the pile hole together with the pile body, causing environmental pollution. In view of the above problems, the applicant has improved and developed a new generation of silt-preventing drainage prefabricated pile, the structure and function of which are different from the published content of the above-mentioned patent, and therefore do not affect the novelty of the present application. SUMMARY

[0006] The present invention aims to overcome the shortcomings of the prior art by providing a novel precast pile for drainage and silt prevention, and a construction method thereof. The present invention utilizes a novel formwork for forming the piles, and lays and secures drainage strips within the pile body grooves, thereby providing a novel pressure-reducing drainage precast pile and construction process thereof. The precast piles for drainage and silt prevention have greater strength and rigidity than permeable concrete piles, while also providing pressure-reducing drainage, accelerating foundation consolidation, shortening construction time, and avoiding environmental pollution.

[0007] A prefabricated pile for anti-clogging and drainage, comprising a pile body, a pile tip, a casing and a pile cap, wherein the pile tip is coaxially fixed to the bottom of the pile body, the casing slides and is coaxially sleeved on the outside of the pile body, the pile cap is coaxially buckled on the top of the pile body, and a plurality of grooves that are uniformly distributed circumferentially and axially pass through the pile body are formed on the outer wall of the pile body; the bottom of the casing is press-supported on the top surface of the pile tip, and the top of the casing is press-supported in the pile cap; a drainage belt is laid on the inner wall of the groove, and a plurality of plug holes are formed on the inner wall of the groove; water-soluble plugs are fixedly inserted in the plug holes, and the middle part of the water-soluble plugs penetrates the drainage belt.

[0008] Moreover, a plurality of connecting rings are fixedly mounted on the drainage belt, and water-soluble plugs are inserted into the connecting rings.

[0009] Moreover, the top surface of the pile body is flush with the top surface of the casing.

[0010] Moreover, the pile body is a square pile, and 1 to 2 grooves are made on each straight side plane of the square pile.

[0011] Moreover, the pile body is a round pile, and 2 to 5 grooves are made on the circumferential outer wall of the round pile.

[0012] Moreover, the groove width is greater than the drainage belt width, the groove width is 12 cm, and the groove depth is 3 to 5 cm.

[0013] Moreover, the drainage belt is a multi-section fixed structure, and two connecting rings are fixed at both ends of each section of the drainage belt; the fixing positions of the connecting rings correspond one to one with the plug holes.

[0014] Moreover, the diameter of the casing is 1 to 2 cm larger than the cross-sectional diameter of the pile body.

[0015] A construction method for anti-clogging drainage prefabricated piles comprises the following steps:

[0016] Step 1: Install connecting rings at both ends of the drainage belt, insert water-soluble plugs through the connecting rings into the plug holes, and secure the drainage belt in the groove of the prefabricated pile body. Then, install a sleeve on the pile body and seal the sleeve and both ends of the pile body with the pile tip and pile cap.

[0017] Step 2: The pile driver enters the site, lifts the prefabricated pile as a whole with a crane, and fixes it to the designed pile position with a pile driver;

[0018] Step 3: Steel pile cap is used when pressing pile to make pile body and sleeve pipe bear force together;

[0019] Step 4: In the process of connecting piles, the pile body is connected first, then the drainage belt is overlapped, and finally the sleeve pipe is welded;

[0020] Step 5: After the pile is sunk to the design elevation, the pile machine is moved to the next pile position, the pile cap is removed, the sleeve pipe at the current pile position is lifted and pulled out by the hoisting machine, and the drainage belt starts to drain water;

[0021] Step 6: After the drainage is completed, the water-soluble plug dissolves and disappears when water is added, and the drainage belt is pulled out.

[0022] The advantages and technical effects of the present application are:

[0023] The prefabricated pile of the present application is provided with a steel sleeve pipe outside the pile body, and the connecting pile tip is pressed into the pile together. The sleeve pipe can prevent the drainage belt in the groove of the pile body from being blocked during the pressing process. The new drainage belt made of anti-blocking plastic material can be used for drainage consolidation after the sleeve pipe is pulled out. After the drainage is completed, the water-soluble plug dissolves and disappears, and the drainage belt can be pulled out to prevent soil pollution.

[0024] The prefabricated pile of the present application is provided with a steel sleeve pipe outside the pile body, and the connecting pile tip is pressed into the pile together. The sleeve pipe can prevent the drainage belt in the groove of the pile body from being blocked during the pressing process. The new drainage belt made of anti-blocking plastic material can be used for drainage consolidation after the sleeve pipe is pulled out. After the drainage is completed, the water-soluble plug dissolves and disappears, and the drainage belt can be pulled out to prevent soil pollution. BRIEF DESCRIPTION OF DRAWINGS

[0025] Figure 1 It is a top view of the prefabricated square pile structure of the present application;

[0026] Figure 2 It is a front view of the prefabricated square pile of the present application;

[0027] Figure 3 It is a top view of the prefabricated round pile structure of the present application;

[0028] Figure 4 It is a front view of the prefabricated round pile of the present application;

[0029] Figure 5 It is a partial sectional view of the present application;

[0030] Figure 6 It is a construction process flow chart of the present application;

[0031] The figure mark: 1- stake tip, 2- water-soluble plug, 3- connecting ring, 4- sleeve, 5- stake body, 6- drainage belt, 7- stake cap, 8- groove; 9- plug hole. DETAILED DESCRIPTION

[0032] In order to further understand the content, features and effects of the present application, the following examples are given, and the details are described below with reference to the drawings. It should be noted that the examples are descriptive, not limiting, and cannot limit the protection scope of the present application.

[0033] A kind of anti-fouling drainage prefabricated pile, including stake body 5, stake tip 1, sleeve 4 and stake cap 7, wherein the bottom of stake body is coaxially fixed stake tip, stake body is slidably and coaxially sleeved sleeve, the top of stake body is coaxially buckled stake cap, and the outer wall of stake body is provided with multiple circumferentially distributed and axially through stake body grooves 8;The bottom of sleeve is supported on the top surface of stake tip, and the top of sleeve is supported in stake cap;Drainage belt 6 is laid on the inner wall of groove, and multiple plug holes 9 are provided on the inner wall of groove;Water-soluble plug 2 is fixedly inserted in plug hole, and the middle part of water-soluble plug penetrates drainage belt.

[0034] Moreover, multiple connecting rings 3 are fixed on the drainage belt, and water-soluble plug is inserted in the connecting ring.

[0035] Moreover, the top surface of stake body is flush with the top surface of sleeve.

[0036] Moreover, the stake body is a square stake, and 1-2 grooves are provided on each straight edge plane of the square stake.

[0037] Moreover, the stake body is a round stake, and 2-5 grooves are provided on the circumferential outer wall of the round stake.

[0038] Moreover, the groove width is greater than the width of the drainage belt, the groove width is 12 cm, and the groove depth is 3-5 cm.

[0039] Moreover, the drainage belt is a multi-section fixed structure, and two connecting rings are fixed on both ends of each section of the drainage belt;The fixed position of the connecting ring corresponds to the plug hole one by one.

[0040] Moreover, the diameter of the sleeve is 1-2 cm greater than the cross-sectional diameter of the stake body.

[0041] A construction method of an anti-fouling drainage prefabricated pile, comprising the following steps:

[0042] Step 1: connecting rings are arranged at both ends of the drainage belt, water-soluble plugs are inserted into the plug holes through the connecting rings, the drainage belt is fixed in the grooves of the prefabricated stake body, then the sleeve is sleeved on the stake body, and the sleeve and the stake body are sealed by the stake tip and the stake cap;

[0043] Step 2: the pile machine enters the site, the prefabricated pile is hoisted by the hoisting machine, and the pile machine is fixed to the designed pile position.

[0044] Step 3: When driving the pile, a steel pile cap should be used to ensure that the pile body and the casing are stressed together;

[0045] Step 4: During the pile connection process, the pile body should be connected first, followed by the overlap of the drainage belt, and finally the welding of the casing;

[0046] Step 5: After sinking the pile to the designed elevation, the pile driver moves to the next pile position, removes the pile cap, and uses the crane to lift and pull out the casing at the current pile position. The drainage belt begins to drain water.

[0047] Step 6: After the drainage is solidified, the water-soluble plug dissolves in water and the drainage tape is pulled out.

[0048] In order to more clearly illustrate the specific embodiment of the present invention, an embodiment is provided below:

[0049] As introduced in the background technology, the existing technology often separates the drainage capacity and bearing capacity of the foundation, resulting in a long construction period and low efficiency. In order to solve the above technical problems, the present application proposes an anti-clogging drainage prefabricated pile and a construction method thereof, which effectively combines the drainage capacity and bearing capacity of the pile foundation, accelerates the dissipation of excess pore water pressure, and achieves the purpose of accelerating foundation consolidation and quickly improving the bearing capacity of the pile foundation.

[0050] The specific technical solutions are as follows:

[0051] Anti-clogging drainage prefabricated piles are prepared using special templates. The pile body is provided with an axially through groove, and plug holes are provided at both ends of the groove. The water-soluble embolic plug is inserted into the plug hole through the connecting ring of the drainage belt to fix it in the groove of the pile body and is pressed in together with the casing.

[0052] Furthermore, the water-soluble embolism is a solid water-soluble material, polyvinyl alcohol. After the casing is pulled out, it comes into contact with water and soil, and dissipates after drainage and consolidation are completed.

[0053] Furthermore, the side walls of the pile body groove can increase the contact area with the soil, increase the pile side friction resistance, and further improve the bearing capacity of the pile foundation.

[0054] Furthermore, the groove has a width of 12 cm and a depth of 4 cm, and is evenly distributed along the cross section of the pile body; the plug holes in the groove have a depth of 2 cm and a diameter of 2 cm, and two are set at each end of the pile body.

[0055] Furthermore, the total length of the drainage belt is 200mm longer than the pile body, and the connection method of the filter membrane core belt flat overlap is used. The overlap length should be 200mm. The exposed length of the drainage belt of the uppermost prefabricated pile above the sand cushion layer should be greater than 200mm, which is used for horizontal water collection and drainage.

[0056] The specific construction methods are as follows:

[0057] 1. According to the construction needs, the shape and size of the reinforced concrete precast pile are determined, the required formwork is made, and the pile is precast.

[0058] 2. Two connecting rings are arranged side by side at both ends of each drainage belt, and the specific positions correspond to the plug holes in the precast pile grooves. The water-soluble plug is inserted into the plug hole through the connecting ring to fix the drainage belt in the precast pile groove.

[0059] 3. The precast pile body is lifted by the hoist and fixed to the designed pile position by the pile press.

[0060] 4. The static pile press is used for pile sinking. If the top pressure pile press is used, the steel pile cap is used to make the pile body and the sleeve pipe sink together. If the embrace pressure pile press is used, the steel sleeve pipe is stressed to make the pile tip sink together with the pile body. When the pile needs to be connected, the pile body should be connected first, then the drainage belt is overlapped, and finally the sleeve pipe is welded.

[0061] 5. After the pile is sunk to the designed elevation, the pile press is moved to the next pile position, the sleeve pipe at the current pile position is lifted and pulled out by the hoist, and the drainage belt starts to work.

[0062] 6. After the pile is sunk, the drainage is completed, the water-soluble plug is dissolved and dispersed, and the drainage belt is pulled out to prevent the foundation from being polluted.

[0063] The unmentioned parts of the present application all adopt mature products and mature technical means in the prior art.

[0064] It should be understood that, for those skilled in the art, improvements or changes can be made according to the above description, and all these improvements and changes should belong to the protection scope of the appended claims of the present application.

Claims

1. A prefabricated pile for preventing siltation and drainage, characterized by: The pile comprises a pile body, a pile tip, a casing and a pile cap, wherein the pile tip is coaxially fixed to the bottom of the pile body, the casing slides and coaxially sleeves on the outside of the pile body, the pile cap is coaxially buckled on the top of the pile body, and a plurality of grooves are formed on the outer wall of the pile body, which are evenly distributed in the circumference and axially penetrate the pile body; the bottom of the casing is supported by pressure on the top surface of the pile tip, and the top of the casing is supported by pressure in the pile cap; a drainage belt is laid on the inner wall of the groove, and a plurality of plug holes are formed on the inner wall of the groove; a water-soluble plug is fixedly inserted in each of the plug holes, and the middle part of the water-soluble plug penetrates the drainage belt; The drainage belt is fixed with a plurality of connecting rings, and the connecting rings are plugged with water-soluble plugs; The drainage belt is a multi-section fixed structure, and two connecting rings are fixed at both ends of each section of the drainage belt; the fixing positions of the connecting rings correspond one to one with the plug holes; The top surface of the pile body is flush with the top surface of the casing.

2. The anti-clogging drainage prefabricated pile according to claim 1, characterized in that: The pile body is a square pile, and 1 to 2 grooves are made on each straight side plane of the square pile.

3. The anti-clogging drainage prefabricated pile according to claim 1, characterized in that: The pile body is a round pile, and 2 to 5 grooves are formed on the circumferential outer wall of the round pile.

4. The anti-clogging drainage prefabricated pile according to claim 1, characterized in that: The width of the groove is greater than the width of the drainage belt, the width of the groove is 12 cm, and the depth of the groove is 3 to 5 cm.

5. The anti-clogging drainage prefabricated pile according to claim 1, characterized in that: The diameter of the casing is 1 to 2 cm larger than the cross-sectional diameter of the pile body.

6. A construction method for anti-clogging drainage prefabricated piles according to claim 1, characterized in that: The following steps are involved: Step 1: Install connecting rings at both ends of the drainage belt, insert water-soluble plugs through the connecting rings into the plug holes, and secure the drainage belt in the groove of the prefabricated pile body. Then, install a sleeve on the pile body and seal the sleeve and both ends of the pile body with the pile tip and pile cap. Step 2: The pile driver enters the site, lifts the prefabricated pile as a whole with a crane, and fixes it to the designed pile position with a pile driver; Step 3: When driving the pile, a steel pile cap should be used to ensure that the pile body and the casing are stressed together; Step 4: During the pile connection process, the pile body should be connected first, followed by the overlap of the drainage belt, and finally the welding of the casing; Step 5: After sinking the pile to the designed elevation, the pile driver moves to the next pile position, removes the pile cap, and uses the crane to lift and pull out the casing at the current pile position. The drainage belt begins to drain water. Step 6: After the drainage is solidified, the water-soluble plug dissolves in water and the drainage tape is pulled out.

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