A support pile inter-pile sealing device and sealing construction method

Abstract

The present application relates to a kind of supporting pile inter-pile plugging device and plugging construction method, the supporting pile inter-pile plugging device includes plugging bag and net air bag;Wherein, the net air bag is covered in the outside of the plugging bag and is connected with the plugging bag, the net air bag is provided with the inflation pipe for inflating its inside;The plugging bag is provided with concrete pouring pipe and exhaust pipe.This supporting pile inter-pile plugging device is simple in structure, low in manufacturing cost, can quickly and effectively plug the soil leakage between foundation pit supporting pile, fill the soil cavity between pile and post-pile, the concrete structure formed can be clamped between two supporting piles, bear certain lateral earth pressure, as part of supporting pile structure, prevent further soil loss between pile, ensure the safety of foundation pit.The plugging construction method using this supporting pile inter-pile plugging device is convenient and efficient, and the plugging effect is good, and the plugging construction efficiency is high.

Description

Technical Field

[0001] This invention relates to the field of foundation pit construction technology, and more specifically, to a sealing device and sealing construction method for the inter-piles of support piles. Background Technology

[0002] In foundation pit construction, cast-in-place piles combined with water-stop curtains have been widely used as an effective form of foundation pit support. Types of water-stop curtains include high-pressure jet grouting piles and cement mixing piles. However, in cases where the groundwater level is high and the soil contains sand layers, the water-stop curtain pile formation effect is not good. During the foundation pit excavation process, sand and soil may flow between the piles, causing voids in the soil between the support piles and behind the piles, which endangers the safety of the foundation pit. Summary of the Invention

[0003] In view of this, the purpose of the present invention is to provide a sealing device and sealing construction method between support piles, which aims to solve the problems existing in the prior art.

[0004] According to a first aspect of the present invention, a sealing device for inter-piles of retaining piles is provided, comprising a sealing bag and a mesh airbag; wherein, The mesh airbag covers the outside of the sealing bag and is connected to the sealing bag. The mesh airbag is provided with an inflation tube for inflating its interior. The sealing bag is equipped with a concrete injection pipe and an exhaust pipe.

[0005] Preferably, a pump pipe connector is connected to the top of the concrete pouring pipe.

[0006] Preferably, the sealing bag has a cylindrical structure, and the sealing bag includes a bottom wall, an outer peripheral wall, and a top wall that are connected as one piece.

[0007] Preferably, both the concrete injection pipe and the vent pipe are located on the top wall of the sealing bag.

[0008] Preferably, the top wall has a grouting port at its center, and the lower end of the concrete grouting pipe is connected to the grouting port.

[0009] Preferably, the exhaust pipe is located on the top wall of the sealing bag near the outer peripheral wall.

[0010] Preferably, the mesh airbag includes multiple circumferential airbags and multiple axial airbags; Multiple circumferential airbags are arranged around the outer peripheral wall of the sealing bag, and the multiple circumferential airbags are spaced apart along the axial direction of the sealing bag; Multiple axial airbags are arranged to extend along the axial direction of the sealing bag, and the two ends of the multiple axial airbags are connected together on the top wall and bottom wall of the sealing bag, respectively. The circumferential airbag and the axial airbag are connected as one unit at their intersection and are interconnected.

[0011] Preferably, the mesh airbag is provided with a circular airbag at the top wall of the sealing bag, the circular airbag surrounds the outside of the concrete pouring pipe, and the top ends of the plurality of axial airbags are connected to the circular airbag. The inflation tube is located on the annular airbag.

[0012] Preferably, both the sealing bag and the mesh airbag are made of rubber material.

[0013] According to a second aspect of the present invention, a method for sealing the space between support piles is provided, the method being implemented using the support pile sealing device described above, and comprising the following steps: Step 1: Insert the sealing bag of the inter-pillar sealing device into the soil cavity between or behind two adjacent support piles, so that the concrete injection pipe of the inter-pillar sealing device faces upwards and the air inlet pipe and exhaust pipe extend out of the support pile. Step 2: Inflate the mesh airbag through the inflation tube to expand the sealing bag and fill the voids in the soil between or behind the piles. Step 3: Connect the concrete pumping device to the concrete injection pipe, and inject concrete into the sealing bag through the concrete injection pipe to fill the inside of the sealing bag with concrete. During the concrete injection process, the air inside the sealing bag is discharged through the exhaust pipe. Step 4: Wait for the concrete inside the sealing bag to solidify, thus completing the permanent sealing of the soil cavities between or behind the piles.

[0014] The present invention provides a sealing device and method for sealing between support piles. A mesh airbag is installed on the outside of the sealing bag. Inflating the mesh airbag expands the sealing bag, filling the voids between or behind the piles in the soil. Concrete is then poured into the sealing bag through a concrete injection pipe. After the concrete solidifies, the voids between or behind the piles are permanently sealed. This sealing device has a simple structure and low manufacturing cost. It can quickly and effectively seal soil leakage between support piles in foundation pits, fill voids between and behind the piles, and form a concrete structure that can be held between two support piles, bearing a certain amount of lateral earth pressure. As part of the support pile structure, it prevents further soil loss between the piles and ensures the safety of the foundation pit. Attached Figure Description

[0015] The above and other objects, features and advantages of the present invention will become clearer from the following description of embodiments of the invention with reference to the accompanying drawings.

[0016] Figure 1 A schematic diagram of the structure of the inter-pillar sealing device according to an embodiment of the present invention is shown.

[0017] In the diagram: 1. Sealing bag; 2. Mesh airbag; 21. Circumferential airbag; 22. Axial airbag; 23. Circular airbag; 3. Concrete pouring pipe; 4. Pump pipe joint; 5. Inflation pipe; 6. Exhaust pipe. Detailed Implementation

[0018] Various embodiments of the invention will now be described in more detail with reference to the accompanying drawings. In the various drawings, the same elements are indicated by the same or similar reference numerals. For clarity, the various parts in the drawings are not drawn to scale.

[0019] This invention provides a sealing device between support piles, see [link to relevant documentation]. Figure 1 The inter-pil sealing device for the support piles includes a sealing bag 1 and a mesh airbag 2. The mesh airbag 2 covers the outside of the sealing bag 1 and is connected to the sealing bag 1. The mesh airbag 2 is provided with an inflation pipe 5 for inflating its interior. The sealing bag 1 is provided with a concrete pouring pipe 3 and an exhaust pipe 6.

[0020] Specifically, both the sealing bag 1 and the mesh airbag 2 are made of elastic material. Inflation of the mesh airbag 2 through the inflation tube 5 causes the sealing bag 1 to expand and occupy a certain volume, temporarily sealing the void between the support piles. In practice, the sealing bag 1 and the mesh airbag 2 can be made of rubber or polyurethane, or other waterproof and wear-resistant materials. In this embodiment, both the sealing bag 1 and the mesh airbag 2 are made of rubber.

[0021] To facilitate the injection of concrete into the sealing bag 1 via a concrete pumping device, a pump pipe connector 4 is connected to the top of the concrete injection pipe 3. This allows for quick and reliable connection to the concrete pumping device, improving the ease of connection between the concrete pumping device and the concrete injection pipe 3. Furthermore, the length of the concrete injection pipe 3 can be extended using the pump pipe connector 4 to facilitate concrete injection.

[0022] In this embodiment, the sealing bag 1 has a cylindrical structure, comprising a bottom wall, an outer peripheral wall, and a top wall connected as a single unit. The cylindrical structure of the sealing bag 1 is easy to manufacture and allows for uniform deformation in all directions during expansion, facilitating effective filling of soil cavities. The cylindrical sealing bag 1 can be designed with different diameters and lengths to accommodate soil cavities between or behind support piles of different sizes. Specifically, the concrete injection pipe 3 and the vent pipe 6 are both located on the top wall of the sealing bag 1, and the concrete injection pipe 3 and the vent pipe 6 are spaced apart. Figure 1As shown, a grouting port is provided at the center of the top wall, and the lower end of the concrete grouting pipe 3 is connected to the grouting port, so that the concrete can be gradually filled from the center of the sealing bag 1 to the surrounding area during grouting, making the sealing bag 1 deform evenly and achieving a good sealing effect. The vent pipe 6 is located on the top wall of the sealing bag 1 near the outer peripheral wall to prevent the concrete from blocking the vent pipe 6 during grouting. By placing the vent pipe 6 on the top wall of the sealing bag 1 near the outer peripheral wall, the concrete is gradually filled from bottom to top and from inside to outside during grouting, so that the sealing bag 1 is filled with concrete as much as possible, and the air in the sealing bag 1 is vented through the vent hole, avoiding the phenomenon of incomplete air removal and the formation of holes.

[0023] Furthermore, such as Figure 1 As shown, the mesh airbag 2 includes multiple circumferential airbags 21 and multiple axial airbags 22. The multiple circumferential airbags 21 surround the outer peripheral wall of the sealing bag 1, and are spaced apart along the axial direction of the sealing bag 1. The multiple axial airbags 22 extend along the axial direction of the sealing bag 1, and their two ends are connected together on the top and bottom walls of the sealing bag 1, respectively. The circumferential airbags 21 and axial airbags 22 are connected as a single unit at their intersections and are interconnected. In this embodiment, the multiple circumferential airbags 21 are evenly distributed along the axial direction of the sealing bag 1, and the multiple axial airbags 22 are evenly distributed along the circumferential direction of the sealing bag 1. In a preferred embodiment, the spacing between two adjacent circumferential airbags 21 increases sequentially from bottom to top. This arrangement avoids uneven filling of soil cavities caused by greater deformation at the bottom and less deformation at the top of the sealing bag 1 due to greater concrete pressure at the bottom.

[0024] In this embodiment, a circular airbag 23 is provided at the top wall of the sealing bag 1, surrounding the concrete pouring pipe 3. The top ends of the plurality of axial airbags 22 are connected to the circular airbag 23, and the inflation tube 5 is provided on the circular airbag 23. By providing the circular airbag 23, the connection of the upper ends of the plurality of axial airbags 22 at the top wall of the sealing bag 1 is facilitated, and the presence of the concrete pouring pipe 3 prevents the upper connection nodes of the plurality of axial airbags 22 from being misaligned.

[0025] The present invention also provides a method for sealing the space between support piles. This method is implemented using the sealing device for the space between support piles as described in the above embodiment, and includes the following steps: Step 1: Insert the sealing bag of the inter-pillar sealing device into the soil cavity between or behind two adjacent support piles, so that the concrete injection pipe of the inter-pillar sealing device faces upwards and the air inlet pipe and exhaust pipe extend out of the support pile.

[0026] Step 2: Inflate the mesh airbag through the inflation tube to expand the sealing bag and fill the voids in the soil between or behind the piles.

[0027] Step 3: Connect the concrete pumping device to the concrete injection pipe, and inject concrete into the sealing bag through the concrete injection pipe to fill the inside of the sealing bag with concrete. During the concrete injection process, the air inside the sealing bag is discharged through the exhaust pipe.

[0028] Step 4: Wait for the concrete inside the sealing bag to solidify, thus completing the permanent sealing of the soil cavities between or behind the piles.

[0029] In summary, the pile-to-pile sealing device provided by this invention features a mesh airbag on the outside of the sealing bag. Inflating the mesh airbag expands the sealing bag, filling the voids between or behind the piles in the soil. Concrete is then poured into the sealing bag through a concrete injection pipe. Once the concrete solidifies, the voids between or behind the piles are permanently sealed. This pile-to-pile sealing device has a simple structure and low manufacturing cost. It can quickly and effectively seal soil leakage between foundation pit support piles, fill voids between and behind the piles, and form a concrete structure that can be held between two support piles, bearing a certain amount of lateral earth pressure. As part of the support pile structure, it prevents further soil loss between the piles, ensuring the safety of the foundation pit. The sealing construction method using this pile-to-pile sealing device is convenient, efficient, and effective, with high construction efficiency.

[0030] It should be noted that, in this document, relational terms such as "first" and "second" are used merely to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes said element.

[0031] Finally, it should be noted that the above embodiments are merely examples for clearly illustrating the present invention and are not intended to limit the implementation. Those skilled in the art will recognize that other variations or modifications can be made based on the above description. It is neither necessary nor possible to exhaustively list all possible implementations. However, obvious variations or modifications derived therefrom are still within the scope of protection of this invention.

Claims

1. A sealing device between support piles, characterized in that, Includes sealing bags and mesh airbags; among them, The mesh airbag covers the outside of the sealing bag and is connected to the sealing bag. The mesh airbag is provided with an inflation tube for inflating its interior. The sealing bag is equipped with a concrete injection pipe and an exhaust pipe; The sealing bag has a cylindrical structure and includes a bottom wall, an outer peripheral wall, and a top wall that are connected as one piece. Both the concrete injection pipe and the vent pipe are located on the top wall of the sealing bag; The top wall has a grouting port at its center, and the lower end of the concrete grouting pipe is connected to the grouting port. The exhaust pipe is located on the top wall of the sealing bag near the outer peripheral wall; The mesh airbag includes multiple circumferential airbags and multiple axial airbags; the multiple circumferential airbags surround the outer peripheral wall of the sealing bag, and the multiple circumferential airbags are spaced apart along the axial direction of the sealing bag; the multiple axial airbags extend along the axial direction of the sealing bag, and the two ends of the multiple axial airbags are connected together on the top wall and bottom wall of the sealing bag, respectively; the circumferential airbags and the axial airbags are connected as a whole and interconnected at their intersections; The mesh airbag is provided with a circular airbag at the top wall of the sealing bag. The circular airbag surrounds the outside of the concrete pouring pipe. The top ends of the plurality of axial airbags are connected to the circular airbag. The inflation tube is provided on the circular airbag.

2. The inter-pillar sealing device according to claim 1, characterized in that, The top of the concrete pouring pipe is connected to a pump pipe joint.

3. The inter-pillar sealing device according to claim 1, characterized in that, Both the sealing bag and the mesh airbag are made of rubber.

4. A method for sealing the spaces between support piles, characterized in that, The construction method is implemented using the inter-pile sealing device as described in any one of claims 1-3, and includes the following steps: Step 1: Insert the sealing bag of the inter-pillar sealing device into the soil cavity between or behind two adjacent support piles, so that the concrete injection pipe of the inter-pillar sealing device faces upwards and the air inlet pipe and exhaust pipe extend out of the support pile. Step 2: Inflate the mesh airbag through the inflation tube to expand the sealing bag and fill the voids in the soil between or behind the piles. Step 3: Connect the concrete pumping device to the concrete injection pipe, and inject concrete into the sealing bag through the concrete injection pipe to fill the inside of the sealing bag with concrete. During the concrete injection process, the air inside the sealing bag is discharged through the exhaust pipe. Step 4: Wait for the concrete inside the sealing bag to solidify, thus completing the permanent sealing of the soil cavities between or behind the piles.

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