Pile foundation construction method suitable for clearance limitation

Abstract

The invention discloses a pile foundation construction method suitable for clearance limitation, and relates to the technical field of pile foundation construction. After a driving machine is started, a driving wheel can be driven to perform circular motion, so that a clamping plate can perform height adjustment in a bearing plate, the moving stability of the clamping plate can be ensured under the action of a limiting column, the clamping stability of pile foundations with different depths can be realized, namely, the construction effect can be ensured, and the construction efficiency is improved. By changing the positions of the limiting columns in the clamping plates, the purpose of clamping pile foundations with different outer diameters can be achieved, after adjustment is completed, installation stability of the limiting columns at different positions can be achieved by screwing the limiting pieces, that is, the purpose of positioning and fixing the clamping plates can be achieved, and by changing the positions of the limiting pieces on the circumferential surface of the driving shaft, the clamping plates can be fixed. And the driving wheels can abut against the clamping plates all the time, and the construction requirement of a foundation pit with the lower distance from the ground can be met.

Description

Technical Field

[0001] The invention relates to the technical field of pile foundation construction, and in particular to a pile foundation construction method suitable for limited clearance. Background Art

[0002] A deep foundation consisting of a pile and a pile cap connected to the top of the pile (referred to as the cap) or a single pile foundation connected by a column and a pile foundation is referred to as a pile foundation. If the pile body is completely buried in the soil and the bottom of the cap is in contact with the soil, it is called a low cap pile foundation; if the upper part of the pile body is exposed to the ground and the bottom of the cap is above the ground, it is called a high cap pile foundation. Building pile foundations are usually low cap pile foundations. Pile foundations are widely used in high-rise buildings.

[0003] Some existing railway bridges and viaducts were built at an early time and are at a low height from the ground. If foundation pits are to be excavated under these bridges, it is often difficult for large construction equipment to carry out operations. For this reason, we propose a pile foundation construction method suitable for limited clearance. Summary of the invention

[0004] The purpose of the present invention is to solve the problems mentioned in the above background technology, and provide a pile foundation construction method suitable for limited clearance.

[0005] In order to achieve the above-mentioned purpose, the present invention specifically adopts the following technical solutions:

[0006] A pile foundation construction method applicable to limited clearance comprises the following steps:

[0007] Step 1: Clear the construction space;

[0008] Step 2: excavate the foundation pit;

[0009] Step 3: Install the protective tube;

[0010] Step 4: Concrete slurry test: test the concrete slurry. If it is qualified, proceed to the next step. If it is unqualified, continue to configure the test;

[0011] Step 5: pouring concrete slurry;

[0012] Step 6: Strength test: after the grouting is completed, the strength test is carried out after a period of time. If it is qualified, the next step is carried out. If it is unqualified, the test is continued after a period of time until the requirements are met.

[0013] Step 7: Pull out the protective tube.

[0014] Furthermore, in the step 1, the ground is grooved until the clearance requirements during construction are met.

[0015] Furthermore, after the excavation of the foundation pit in step 2 is completed, a bottom plate and a cushion layer are set at the bottom of the foundation pit.

[0016] Furthermore, the installation of components in step three includes:

[0017] A clamping mechanism, the clamping mechanism comprising two symmetrically arranged clamping plates, driving wheels mounted on the front and back sides of the clamping plates, a driving machine mounted between the two driving wheels in the same row, a retaining spring mounted on the outside of the driving wheels, and the retaining spring is sleeved on the circumferential surface of the driving shaft of the driving machine, three limiting columns movably mounted on the outside of the clamping plates, and a limiting piece sleeved on the circumferential surface of the upper end of each limiting column;

[0018] The supporting mechanism includes two fixing seats sleeved on the circumferential outer wall of the driving machine, a fixing plate installed on the circumferential surface of the driving shaft of the driving machine, a supporting plate installed on the fixing seats and the lower ends of the fixing plates, and support columns detachably installed at the four corners of the lower end of the supporting plate.

[0019] Furthermore, a plurality of transmission teeth are evenly arranged on the front and back sides of each clamping plate in the vertical direction, and a driving tooth is arranged on the circumferential surface of each driving wheel, and the driving teeth are meshed and connected with the transmission teeth.

[0020] Furthermore, each of the clamping plates is provided with a movable groove with arc-shaped structures at both ends, and the upper end of the limiting column is movably connected to the clamping plate through the movable groove.

[0021] Furthermore, a threaded connection portion is provided on the circumferential surface of the upper end of each of the limiting columns, a threaded hole is provided inside the limiting member, and the limiting column is connected to the limiting member through threads.

[0022] Furthermore, a positioning hole is provided inside the fixing seat, and the driving motor is installed in the positioning hole.

[0023] Furthermore, bearings are sleeved on the circumferential surfaces of the intersections of the driving shaft of the driving machine and the fixing plate.

[0024] Furthermore, connecting holes are provided on both sides of the supporting plate, the lower ends of the limiting columns are inserted into the connecting holes, a through slot is provided in the middle of the supporting plate, and the clamping plate is movably installed in the through slot.

[0025] The beneficial effects of the present invention are as follows:

[0026] 1. After the driving machine of the present invention is started, it can drive the driving wheel to perform circular motion, so that the height of the clamping plate inside the supporting plate can be adjusted. Under the action of the limit column, the moving stability of the clamping plate can be guaranteed, and then the clamping stability of pile foundations of different depths can be achieved, that is, the construction effect can be guaranteed. By changing the position of the limit column inside the clamping plate, the clamping purpose of pile foundations of different outer diameters can be achieved. After the adjustment is completed, tightening the limit piece can achieve the installation stability of the limit column at different positions, that is, the positioning and fixing purpose of the clamping plate can be achieved. By changing the position of the limit piece on the circumferential surface of the driving shaft, the driving wheel can always be against the clamping plate, that is, it can meet the construction needs of foundation pits with a lower height from the ground.

[0027] 2. The present invention can achieve the installation stability of the driving machine under the action of the fixed seat, can ensure the installation stability of the driving shaft and the driving wheel on the circumferential surface under the action of the fixed plate, can achieve the installation stability of the fixed seat and the fixed plate under the action of the supporting plate, and can achieve the installation stability of the supporting plate under the action of the support column, that is, it can ensure the use effect of the entire clamping mechanism. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] Figure 1 It is a work flow chart of the present invention;

[0029] Figure 2 It is a three-dimensional schematic diagram of the installation assembly in the present invention;

[0030] Figure 3 is a front cross-sectional view of the installation assembly of the present invention;

[0031] Figure 4 It is a three-dimensional schematic diagram of the clamping mechanism in the present invention;

[0032] Figure 5 It is a three-dimensional schematic diagram of the supporting mechanism in the present invention.

[0033] Figure numerals: 1. Clamping mechanism; 101. Clamping plate; 102. Driving wheel; 103. Driving machine; 104. Retaining spring; 105. Limiting column; 106. Limiting member; 2. Supporting mechanism; 201. Fixed seat; 202. Fixed plate; 203. Supporting plate; 204. Supporting column. DETAILED DESCRIPTION

[0034] To make the purpose, technical solution and advantages of the embodiments of the present invention more clear, the technical solution in the embodiments of the present invention will be clearly and completely described below in conjunction with the accompanying drawings in the embodiments of the present invention.

[0035] See also Figure 1 The present invention provides a pile foundation construction method applicable to a pile foundation with limited clearance, comprising the following steps:

[0036] Step 1: Clear the construction space; groove the ground until the clearance requirements for construction are met.

[0037] Step 2: excavate the foundation pit; after the excavation of the foundation pit is completed, a base plate and a cushion layer are set at the bottom of the foundation pit, which can effectively improve the stress strength inside the foundation pit, thereby ensuring the construction effect of the pile foundation.

[0038] Step 3: Install the protective tube by installing the components; by placing the protective tube into the foundation pit, the purpose of protecting the side wall of the foundation pit can be achieved and the force-bearing strength of the side wall can be improved.

[0039] Step 4: Concrete slurry test: test the concrete slurry. If qualified, proceed to the next step. If unqualified, continue with the configuration test. Qualified concrete slurry can achieve the construction effect of pile foundation.

[0040] Step 5: pouring concrete slurry; placing the prepared concrete slurry into the interior of the protective tube, and the protective tube can achieve the purpose of fixing the mold of the concrete slurry.

[0041] Step 6: Strength test: after the grouting is completed, the strength test is carried out after a period of time. If it is qualified, the next step is carried out. If it is unqualified, the test is continued after a period of time until the requirements are met.

[0042] Step seven, pull out the protective tube; after the pile foundation is poured, pull out the protective tube to complete the construction of the pile foundation.

[0043] See also Figure 2 - Figure 5 , the present invention provides a pile foundation construction method suitable for limited clearance;

[0044] The components installed in step 3 include:

[0045] The clamping mechanism 1 includes two symmetrically arranged clamping plates 101, driving wheels 102 installed on the front and back sides of the clamping plates 101, a driving machine 103 installed between the two driving wheels 102 in the same row, a retaining spring 104 installed on the outside of the driving wheel 102, and the retaining spring 104 is sleeved on the circumferential surface of the driving shaft of the driving machine 103, three limiting columns 105 movably installed on the outside of the clamping plate 101, and a limiting piece 106 sleeved on the circumferential surface of the upper end of each limiting column 105.

[0046] The clamping plate 101 can clamp the mounting cylinder, the driving wheel 102 can adjust the height of the clamping plate 101, the driving wheel 102 can rotate, the limiting column 105 can ensure the movement stability of the clamping plate 101, and the limiting member 106 can position and fix the limiting column 105.

[0047] After starting the driving machine 103, it can drive the driving wheel 102 to perform circular motion, so that the height of the clamping plate 101 inside the supporting plate 203 can be adjusted. Under the action of the limiting column 105, the movement stability of the clamping plate 101 can be guaranteed, and then the clamping stability of pile foundations of different depths can be achieved, that is, the construction effect can be guaranteed. By changing the position of the limiting column 105 inside the clamping plate 101, the clamping purpose of pile foundations of different outer diameters can be achieved. After the adjustment is completed, tightening the limiting member 106 can achieve the installation stability of the limiting column 105 at different positions, that is, the positioning and fixing purpose of the clamping plate 101 can be achieved. By changing the position of the limiting member 106 on the circumferential surface of the driving shaft, the driving wheel 102 can always be against the clamping plate 101, that is, it can meet the construction needs of foundation pits with a lower height from the ground.

[0048] The support mechanism 2 includes two fixing seats 201 which are sleeved on the outer circumferential wall of the driving machine 103, a fixing plate 202 which is installed on the circumferential surface of the driving shaft of the driving machine 103, a supporting plate 203 which is installed on the lower ends of the fixing seats 201 and the fixing plate 202, and support columns 204 which are detachably installed at the four corners of the lower end of the supporting plate 203.

[0049] Under the action of the fixed seat 201, the installation stability of the driving motor 103 can be achieved; under the action of the fixed plate 202, the installation stability of the driving shaft and the circumferential surface of the driving wheel 102 can be guaranteed; under the action of the supporting plate 203, the installation stability of the fixed seat 201 and the fixed plate 202 can be achieved; under the action of the support column 204, the installation stability of the supporting plate 203 can be achieved, that is, the use effect of the entire clamping mechanism 1 can be guaranteed.

[0050] In this embodiment, preferably, the front and back sides of each clamping plate 101 are evenly provided with a plurality of transmission teeth in the vertical direction, and the circumferential surface of each driving wheel 102 is provided with driving teeth, and the driving teeth and the transmission teeth are meshingly connected; with the cooperation of the driving teeth and the transmission teeth, the movement stability of the clamping plate 101 can be guaranteed.

[0051] In this embodiment, preferably, each clamping plate 101 is provided with a movable groove with arc-shaped structures at both ends, and the upper end of the limiting column 105 is movably connected with the clamping plate 101 through the movable groove; under the action of the movable groove, space can be provided for the movement of the limiting column 105, and it also has a limiting effect.

[0052] In this embodiment, preferably, the circumferential surface of the upper end of each limiting column 105 is provided with a threaded connection portion, and a threaded hole is provided inside the limiting member 106. The limiting column 105 and the limiting member 106 are connected by threads; the position adjustment purpose of the limiting member 106 can be achieved through the threaded connection.

[0053] In this embodiment, preferably, a positioning hole is provided inside the fixing seat 201, and the driving machine 103 is installed in the positioning hole; under the effect of the positioning hole, the installation stability of the driving machine 103 can be ensured.

[0054] In this embodiment, preferably, the circumferential surface of the intersection of the driving shaft of the driving machine 103 and the fixed plate 202 is sleeved with bearings; under the action of the fixed plate 202, the installation stability of the bearings can be guaranteed, and under the action of the bearings, the installation stability of the driving shaft can be guaranteed without affecting the rotation of the driving shaft.

[0055] In this embodiment, preferably, connecting holes are opened on both sides of the support plate 203, the lower end of the limiting column 105 is inserted into the connecting hole, and a through groove is opened in the middle of the support plate 203, and the clamping plate 101 is movably installed in the through groove; the installation stability of the lower end of the limiting column 105 can be guaranteed under the action of the connecting hole, and the movement stability of the clamping plate 101 can be guaranteed under the action of the through groove.

[0056] The working principle and use process of the present invention are as follows: when the device is used, after starting the driving machine 103, the driving wheel 102 can be driven to perform circular motion, so that the height of the clamping plate 101 can be adjusted inside the supporting plate 203. Under the action of the limiting column 105, the movement stability of the clamping plate 101 can be guaranteed, and then the clamping stability of pile foundations of different depths can be achieved, that is, the construction effect can be guaranteed. By changing the position of the limiting column 105 inside the clamping plate 101, the clamping purpose of pile foundations of different outer diameters can be achieved. After the adjustment is completed, tightening the limiting member 106 can achieve the installation stability of the limiting columns 105 at different positions, that is, the clamping plate 10 1 is positioned and fixed for the purpose of changing the position of the limit piece 106 on the circumferential surface of the driving shaft, so that the driving wheel 102 can always be against the clamping plate 101, that is, it can meet the construction requirements of the foundation pit with a low height from the ground; under the action of the fixed seat 201, the installation stability of the driving machine 103 can be achieved, under the action of the fixed plate 202, the installation stability of the driving shaft and the circumferential surface of the driving wheel 102 can be guaranteed, under the action of the supporting plate 203, the installation stability of the fixed seat 201 and the fixed plate 202 can be achieved, and under the action of the support column 204, the installation stability of the supporting plate 203 can be achieved, that is, the use effect of the entire clamping mechanism 1 can be guaranteed.

[0057] The above description of the disclosed embodiments enables those skilled in the art to implement or use the present invention. Various modifications to these embodiments will be apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention will not be limited to the embodiments shown herein, but rather to the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A pile foundation construction method suitable for limited clearance, characterized in that: The steps include: Step 1: Clear the construction space; Step 2: excavate the foundation pit; Step 3: Install the protective tube; Step 4: Concrete slurry test: test the concrete slurry. If it is qualified, proceed to the next step. If it is unqualified, continue to configure the test. Step 5: pouring concrete slurry; Step 6: Strength test: after the grouting is completed, the strength test is carried out after a period of time. If it is qualified, the next step is carried out. If it is unqualified, the test is continued after a period of time until the requirements are met. Step 7: Pull out the protective tube.

2. A pile foundation construction method applicable to limited clearance according to claim 1, characterized in that: In the step 1, the ground is grooved until the clearance requirement during construction is met.

3. A pile foundation construction method applicable to limited clearance according to claim 1, characterized in that: After the excavation of the foundation pit is completed in step 2, a bottom plate and a cushion layer are arranged at the bottom of the foundation pit.

4. A pile foundation construction method applicable to limited clearance according to claim 1, characterized in that: The installation components in step 3 include: A clamping mechanism (1), the clamping mechanism (1) comprising two symmetrically arranged clamping plates (101), driving wheels (102) mounted on the front and back sides of the clamping plates (101), a driving machine (103) mounted between two driving wheels (102) located in the same row, a retaining spring (104) mounted on the outside of the driving wheels (102), the retaining spring (104) being sleeved on the circumferential surface of the driving shaft of the driving machine (103), three limiting posts (105) movably mounted on the outside of the clamping plates (101), and a limiting member (106) sleeved on the circumferential surface of the upper end of each limiting post (105); A support mechanism (2), the support mechanism (2) comprising two fixing seats (201) sleeved on the circumferential outer wall of the driving machine (103), a fixing plate (202) installed on the circumferential surface of the driving shaft of the driving machine (103), a supporting plate (203) installed at the lower ends of the fixing seats (201) and the fixing plate (202), and support columns (204) detachably installed at the four corners of the lower end of the supporting plate (203).

5. A pile foundation construction method applicable to limited clearance according to claim 4, characterized in that: A plurality of transmission teeth are evenly arranged on the front and back sides of each clamping plate (101) in the vertical direction, and a driving tooth is arranged on the circumferential surface of each driving wheel (102), and the driving teeth are meshed and connected with the transmission teeth.

6. A pile foundation construction method applicable to limited clearance according to claim 4, characterized in that: Each of the clamping plates (101) is provided with a movable groove with arc-shaped structures at both ends, and the upper end of the limiting column (105) is movably connected to the clamping plate (101) through the movable groove.

7. A pile foundation construction method applicable to limited clearance according to claim 4, characterized in that: A threaded connection portion is provided on the circumferential surface of the upper end of each of the limiting columns (105), a threaded hole is provided inside the limiting member (106), and the limiting columns (105) and the limiting member (106) are connected via threads.

8. A pile foundation construction method applicable to limited clearance according to claim 4, characterized in that: A positioning hole is provided inside the fixing seat (201), and the driving machine (103) is installed in the positioning hole.

9. A pile foundation construction method applicable to limited clearance according to claim 4, characterized in that: The circumferential surfaces of the intersections of the driving shaft of the driving machine (103) and the fixing plate (202) are sleeved with bearings.

10. A pile foundation construction method applicable to limited clearance according to claim 4, characterized in that: The supporting plate (203) is provided with connection holes on both sides, the lower ends of the limiting columns (105) are inserted into the connection holes, and the middle of the supporting plate (203) is provided with a through slot, and the clamping plate (101) is movably installed in the through slot.

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