Micropore negative pressure device for improving pervious pipe pile hole seepage efficiency

Abstract

The invention provides a micropore negative pressure device for improving pervious pipe pile hole seepage efficiency, and relates to the technical field of pipe pile construction equipment.The micropore negative pressure device comprises a plurality of pervious plugs, each pervious plug comprises a micropore column, an upper buckle and a lower buckle, and the upper buckle and the lower buckle are fixedly arranged at the upper end and the lower end of the micropore column respectively; the microporous column is provided with drainage channels which are vertically arranged in a penetrating mode, and when the water permeable plugs are sequentially placed into the water permeable pipe pile, the upper buckles and the lower buckles of every two adjacent water permeable plugs are automatically buckled, so that the drainage channels of the water permeable plugs are sequentially connected to form a water pumping channel used for pumping negative pressure. The method has the beneficial effects that the drainage mode of the permeable holes of the permeable pipe pile is changed from active drainage to passive water pumping, the permeation efficiency of the permeable holes is effectively improved on the premise of ensuring that the ultimate compressive strength of the permeable pipe pile is not affected and under the condition of limited pile body hole radius and hole number, and the permeation rate of the permeable pipe pile is increased. And the working efficiency of the permeable pipe pile is obviously improved.

Description

Technical Field

[0001] The invention relates to the technical field of pipe pile construction equipment, and in particular to a microporous negative pressure device for improving the seepage efficiency of a permeable pipe pile hole. Background Art

[0002] Soft soil areas pose great challenges to pile foundation engineering due to their high water content, large porosity, low permeability and high compressibility. In particular, when driving precast piles, excessive excess pore water pressure is often generated, resulting in a decrease in the initial bearing capacity of the pile foundation after the pile is formed. The bearing capacity recovery process can last up to three months, which seriously slows down the construction progress and increases the construction cost. Therefore, in order to accelerate the dissipation of excess pore water pressure, a closed pipe pile with holes drilled in the pile body is proposed, called a permeable pipe pile. However, although the current permeable pipe pile can effectively accelerate the dissipation of excess pore pressure and shorten the long-term bearing capacity recovery time of the pile foundation, in order to ensure that the ultimate compressive strength of the pile foundation meets the standard, it is necessary to limit the radius and number of holes in the pile body. In addition, the drainage of the permeable holes in the pile body lacks "initiative" and has limited drainage efficiency. Conventional permeable pipe piles can only increase the dissipation rate of excess pore pressure within a limited range. Summary of the invention

[0003] In view of this, in order to solve the problem of limited drainage efficiency of current permeable pipe piles, an embodiment of the present invention provides a microporous negative pressure device for improving the seepage efficiency of permeable pipe pile holes.

[0004] The embodiment of the present invention provides a microporous negative pressure device for improving the seepage efficiency of a permeable pipe pile hole, comprising a plurality of permeable plugs, each of which comprises a microporous column, and an upper buckle and a lower buckle respectively fixedly arranged at the upper end and the lower end of the microporous column. When each of the permeable plugs is sequentially placed in the permeable pipe pile, the upper buckle and the lower buckle of two adjacent permeable plugs are automatically buckled, so that the drainage channels of each of the permeable plugs are sequentially connected to form a pumping channel for pumping negative pressure.

[0005] Furthermore, the lower buckle includes a lower base plate and a raised block arranged on the lower base plate, the lower base plate is also provided with a water hole, the water hole passes through the raised block and is aligned with the drainage channel up and down, the upper buckle includes an upper base plate and a plurality of elastic clamping blocks, the upper base plate is provided with a socket, a plurality of elastic clamping blocks are arranged on the inner wall of the socket, and the raised block can be inserted into the socket and clamped by each of the elastic clamping blocks.

[0006] Furthermore, an annular mounting groove is provided on the inner wall of the jack, and each of the elastic card blocks is arranged in the mounting groove and is spaced around the jack.

[0007] Furthermore, the elastic block includes a movable block and an elastic member, the elastic member is arranged along the radial direction of the insertion hole, one end of the elastic member is fixedly connected to the upper base plate, and the other end of the elastic member is fixedly connected to the movable block.

[0008] Further, the raised block includes a truncated cone-shaped clamping joint protruding relative to the lower surface of the lower substrate, an annular clamping groove is provided between the clamping joint and the lower surface of the lower substrate, the movable clamping block is a triangular block, and the movable clamping block is provided with an inclined contact surface adapted to the side wall of the clamping joint, and the clamping joint can be inserted under the movable clamping block so that the movable clamping block is clamped into the annular clamping groove.

[0009] Furthermore, the maximum diameter of the card connector is the same as the diameter of the insertion hole.

[0010] Furthermore, the elastic member is a spring.

[0011] Furthermore, the lower substrate and the upper substrate are both circular plates with a diameter the same as the outer diameter of the microporous column.

[0012] Furthermore, the microporous columns are formed by wrapping silicate cement slurry around the outside of the permeable aggregate to achieve mutual bonding.

[0013] Furthermore, the drainage channel is coaxially arranged with the microporous column.

[0014] The beneficial effects brought about by the technical solution provided by the embodiment of the present invention are:

[0015] 1. A microporous negative pressure device for improving the seepage efficiency of permeable pipe pile holes of the present invention comprises the following steps: selecting a required number of permeable plugs according to the depth of the permeable pipe pile, placing the permeable plugs into the permeable pipe pile from bottom to top in sequence, and automatically buckling two adjacent permeable plugs through an upper buckle and a lower buckle to form a pumping channel in the middle of all the permeable plugs; connecting the upper end of the pumping channel to a negative pressure pump, and continuously pumping air to allow the inside of the permeable pipe pile to enter and maintain a negative pressure state; due to the internal and external pressure difference, the pile hole of the permeable pipe pile begins to actively absorb pore water around the pile, thereby effectively accelerating the dissipation of excess pore water pressure around the pile, and changing the drainage mode of the permeable hole of the permeable pipe pile from active drainage to passive pumping; on the premise of ensuring that the ultimate compressive strength of the permeable pile is not affected, under the conditions of a limited pile body opening radius and a limited number of openings, the infiltration efficiency of the permeable hole is effectively improved, thereby significantly accelerating the working efficiency of the permeable pipe pile.

[0016] 2. The microporous negative pressure device for improving the seepage efficiency of the permeable pipe pile hole of the present invention, after the water in the permeable pipe pile is completely pumped out and the hole pressure is completely dissipated, since each permeable plug is firmly locked by the upper buckle and the lower buckle, the entire device can be taken out by pulling the uppermost permeable plug, thereby realizing repeated use in other permeable pipe piles. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a schematic diagram of a microporous negative pressure device for improving the seepage efficiency of a permeable pipe pile hole according to the present invention;

[0018] Figure 2 It is a cross-sectional view of a microporous negative pressure device for improving the seepage efficiency of a permeable pipe pile hole according to the present invention;

[0019] Figure 3 It is the first schematic diagram of the water-permeable plug;

[0020] Figure 4 It is the second schematic diagram of the water-permeable plug;

[0021] Figure 5 is a schematic diagram of a microporous column;

[0022] Figure 6 This is a schematic diagram of the upper buckle;

[0023] Figure 7 This is an exploded view of the upper buckle;

[0024] Figure 8 This is a schematic diagram of the lower buckle.

[0025] In the figure: 1. water-permeable plug; 2. microporous column; 3. upper buckle; 4. lower buckle; 5. drainage channel; 6. upper base plate; 7. movable block; 8. elastic member; 9. plug hole; 10. mounting groove; 11. inclined contact surface; 12. lower base plate; 13. clamping joint; 14. annular clamping groove; 15. water hole. DETAILED DESCRIPTION

[0026] In order to make the purpose, technical solution and advantages of the present invention clearer, the following will further describe the embodiments of the present invention in conjunction with the accompanying drawings. The following is a preferred embodiment of the present invention, which is intended to provide a basic understanding of the present invention, but is not intended to confirm the key or decisive elements of the present invention or to limit the scope of protection.

[0027] In all examples shown and discussed herein, any specific values ​​should be interpreted as merely exemplary and not as limiting. Therefore, other examples of the exemplary embodiments may have different values.

[0028] Technologies, methods, and equipment known to ordinary technicians in the relevant art may not be discussed in detail, but where appropriate, the technologies, methods, and equipment should be considered as part of the specification.

[0029] It should be noted that similar reference numerals and letters represent similar items in the following drawings, so once an item is defined in one drawing, it does not need to be further discussed in the subsequent drawings. At the same time, it should be understood that for ease of description, the sizes of the various parts shown in the drawings are not drawn according to the actual proportional relationship.

[0030] It should be noted that, unless otherwise clearly specified and limited, the terms "installation" and "connection" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0031] Please refer to Figure 1 and Figure 2 An embodiment of the present invention provides a microporous negative pressure device for improving the seepage efficiency of a permeable pipe pile hole, comprising a plurality of permeable plugs 1.

[0032] The number of the water-permeable plugs 1 is determined according to the depth of the water-permeable pipe pile. Generally, when determining the number of the water-permeable plugs 1, the sum of the lengths of the water-permeable plugs 1 is greater than or equal to the depth of the water-permeable pipe pile.

[0033] Please refer to Figure 3 and Figure 4 Each of the water-permeable plugs 1 includes a microporous column 2, and an upper buckle 3 and a lower buckle 4 fixedly arranged at the upper and lower ends of the microporous column 2, respectively. The microporous column 2 is provided with a drainage channel 5 vertically penetrated. When each of the water-permeable plugs 1 is placed into the water-permeable pile in turn, the upper buckle 3 and the lower buckle 4 of the two adjacent water-permeable plugs 1 are automatically buckled, so that the drainage channels 5 of each of the water-permeable plugs 1 are connected in turn to form a pumping channel for pumping negative pressure.

[0034] Please refer to Figure 5 The microporous column 2 is a cylinder with a diameter slightly smaller than the inner diameter of the permeable pipe pile, so that the permeable plug 1 can be placed in the permeable pipe pile. The microporous column 2 is formed by wrapping the silicate cement slurry outside the permeable aggregate to achieve mutual bonding. For example, the permeable aggregate can be selected from lightweight aggregates such as ceramsite and pumice, so as to form the microporous column 2 with a porous cylindrical structure that is permeable, air-permeable, lightweight and high-strength.

[0035] The drainage channel 5 is generally arranged at the center of the microporous column 2 and coaxially arranged with the microporous column 2, so that the pore water of the permeable pipe pile can evenly pass through the microporous column 2 into the drainage channel 5, which is conducive to the centralized discharge of the pore water.

[0036] Please refer to Figure 6 , Figure 7and Figure 8 The lower buckle 4 includes a lower base plate 12 and a protruding block arranged on the lower base plate 12. The lower base plate 12 is also provided with a water hole 15. The water hole 15 passes through the protruding block and is aligned with the drainage channel 5 up and down. The upper buckle 3 includes an upper base plate 6 and a plurality of elastic card blocks. The upper base plate 6 is provided with a plug hole 9. A plurality of elastic card blocks are arranged on the inner wall of the plug hole 9. The protruding block can be inserted into the plug hole 9 and clamped by each of the elastic card blocks.

[0037] The lower substrate 12 and the upper substrate 6 are both circular plates with the same diameter as the outer diameter of the microporous column 2, so that the water-permeable plug 1 forms a cylindrical structure as a whole.

[0038] In some embodiments, the inner wall of the jack 9 is provided with an annular mounting groove 10, where the interior of the upper substrate 6 is a hollow structure, and the mounting groove 10 is formed in the upper substrate 6 at the periphery of the jack 9. Each of the elastic card blocks is disposed in the mounting groove 10 and is spaced around the jack 9. Preferably, each of the elastic card blocks is radially disposed along the mounting groove 10, and each of the elastic card blocks is evenly spaced around the jack 9.

[0039] The elastic block includes a movable block 7 and an elastic member 8, wherein the elastic member 8 is radially arranged along the insertion hole 9, and one end of the elastic member 8 is fixedly connected to the upper substrate 6, and the other end is fixedly connected to the movable block 7. When the protruding block is not inserted into the insertion hole 9, the elastic member 8 naturally stretches and protrudes relative to the inner wall of the insertion hole 9, and when the protruding block is not inserted into the insertion hole 9, the protruding block is pressed to move outward, thereby limiting the protruding block in the insertion hole 9. Preferably, the elastic member 8 is a spring.

[0040] The elastic block and the protruding block are matched in shape to form a one-way buckle, so that the protruding block can be inserted into the jack 9 and then clamped by each elastic block. In this embodiment, the protruding block includes a truncated cone-shaped clamping joint 13 protruding relative to the lower surface of the lower substrate 12, and an annular clamping groove 14 is provided between the clamping joint 13 and the lower surface of the lower substrate 12. The movable clamping block 7 is a triangular block, and the movable clamping block 7 is provided with an inclined contact surface 11 adapted to the side wall of the clamping joint 13. The clamping joint 13 can be inserted under the movable clamping block 7 so that the movable clamping block 7 is clamped into the annular clamping groove 14. After the clamping joint 13 is inserted into the jack 9, it first contacts the inclined contact surface 11 of the movable clamping block 7 through the side, pushing the movable clamping block 7 to move outward, and the elastic member 8 is compressed. When the clamping joint 13 moves to below the movable clamping block 7, the elastic member 8 is restored to make the movable clamping block 7 clamped into the annular clamping groove 14, thereby fastening the clamping joint 13. Preferably, the maximum diameter of the card connector 13 is the same as the diameter of the insertion hole 9 .

[0041] The embodiment of the present invention provides a microporous negative pressure device for improving the seepage efficiency of the permeable pipe pile hole. When discharging the pore water in the permeable pipe pile, firstly, the required number of the permeable plugs 1 are selected according to the depth of the permeable pipe pile, and then the permeable plugs 1 are sequentially placed into the permeable pipe pile from bottom to top, and two adjacent permeable plugs 1 are automatically buckled through the lower buckle 4 and the upper buckle 3, so that the drainage channels 5 in all the permeable plugs 1 are sequentially connected to form a pumping channel, and then the upper end of the pumping channel is connected to the negative pressure pump, and air is continuously pumped to allow the inside of the permeable pipe pile to enter and maintain a negative pressure state. Due to the internal and external pressure difference, the permeable pipe pile hole actively absorbs the pore water around the pile, so that the pore water in the permeable pipe pile can be quickly and efficiently discharged; finally, after the pore water in the permeable pipe pile is completely pumped out and the pore pressure is completely dissipated, since each of the permeable plugs 1 is firmly locked by the lower buckle 4 and the upper buckle 3, the entire device can be taken out by pulling the uppermost permeable plug 1, thereby realizing repeated use in other permeable pipe piles.

[0042] In this article, the directional words such as front, back, top, and bottom involved are defined by the positions of the parts in the drawings and the positions of the parts relative to each other, just for the sake of clarity and convenience in expressing the technical solution. It should be understood that they are relative concepts and can change accordingly according to different ways of use and placement, and the use of the directional words should not limit the scope of protection claimed in this application.

[0043] In the absence of conflict, the above embodiments and features in the embodiments may be combined with each other. The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A microporous negative pressure device for improving the seepage efficiency of permeable pipe pile holes, characterized in that: It comprises a plurality of water-permeable plugs, each of which comprises a microporous column, and an upper buckle and a lower buckle respectively fixedly arranged at the upper end and the lower end of the microporous column, the microporous column is provided with a drainage channel vertically penetrating therethrough, and when each of the water-permeable plugs is sequentially placed into the water-permeable pipe pile, the upper buckle and the lower buckle of two adjacent water-permeable plugs are automatically buckled, so that the drainage channels of each of the water-permeable plugs are sequentially connected to form a pumping channel for pumping negative pressure.

2. A microporous negative pressure device for improving the seepage efficiency of a permeable pipe pile hole as claimed in claim 1, characterized in that: The lower buckle includes a lower base plate and a raised block arranged on the lower base plate. The lower base plate is also provided with a water hole, which passes through the raised block and is aligned with the drainage channel up and down. The upper buckle includes an upper base plate and a plurality of elastic blocks. The upper base plate is provided with an insertion hole. The plurality of elastic blocks are arranged on the inner wall of the insertion hole. The raised block can be inserted into the insertion hole and clamped by each of the elastic blocks.

3. A microporous negative pressure device for improving the seepage efficiency of permeable pipe pile holes as claimed in claim 2, characterized in that: The inner wall of the insertion hole is provided with an annular installation groove, and each of the elastic card blocks is arranged in the installation groove and is arranged around the insertion hole at intervals.

4. A microporous negative pressure device for improving the seepage efficiency of a permeable pipe pile hole as claimed in claim 2, characterized in that: The elastic block comprises a movable block and an elastic member, wherein the elastic member is arranged along the radial direction of the insertion hole, and one end of the elastic member is fixedly connected to the upper base plate, and the other end of the elastic member is fixedly connected to the movable block.

5. A microporous negative pressure device for improving the seepage efficiency of permeable pipe pile holes as claimed in claim 4, characterized in that: The raised block includes a truncated cone-shaped clamping joint protruding relative to the lower surface of the lower substrate, an annular clamping groove is provided between the clamping joint and the lower surface of the lower substrate, the movable clamping block is a triangular block, and the movable clamping block is provided with an inclined contact surface adapted to the side wall of the clamping joint, and the clamping joint can be inserted under the movable clamping block so that the movable clamping block is clamped into the annular clamping groove.

6. A microporous negative pressure device for improving the seepage efficiency of permeable pipe pile holes as claimed in claim 5, characterized in that: The maximum diameter of the card connector is the same as the diameter of the insertion hole.

7. A microporous negative pressure device for improving the seepage efficiency of permeable pipe pile holes as claimed in claim 4, characterized in that: The elastic member is a spring.

8. A microporous negative pressure device for improving the seepage efficiency of permeable pipe pile holes as claimed in claim 2, characterized in that: The lower substrate and the upper substrate are both circular plates with the same diameter as the outer diameter of the microporous column.

9. A microporous negative pressure device for improving the seepage efficiency of permeable pipe pile holes as claimed in claim 1, characterized in that: The microporous column is formed by wrapping silicate cement slurry around the outside of the permeable aggregate to achieve mutual bonding.

10. A microporous negative pressure device for improving the seepage efficiency of permeable pipe pile holes as claimed in claim 1, characterized in that: The drainage channel is coaxially arranged with the microporous column.

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