A seepage-proof connection structure between a steel-concrete mixing wall and a cement-soil pile.

Abstract

This utility model provides a seepage-proof connection structure between a steel-concrete mixing wall and a cement-soil pile. The seepage-proof connection structure includes: a pile body, an H-beam, and a grouting mechanism. The H-beam is pre-embedded in the pile body, and the grouting mechanism is provided on the H-beam. The grouting mechanism includes a grouting pipe, a discharge pipe, a first fixing ring, a second fixing ring, and a fixing component. The seepage-proof connection structure between the steel-concrete mixing wall and the cement-soil pile provided by this utility model, through a dual seepage-proof mechanism of "groove interlocking + secondary grouting," can significantly reduce the interface permeability coefficient. The mechanical interlocking structure can physically block the seepage path, and the secondary grouting actively fills micro-cracks. The combination of these two methods effectively solves the problem of leakage caused by frictional resistance, meeting the seepage-proof requirements under complex geological conditions such as high-water-level sand layers, and reducing the risk of groundwater seeping into the foundation pit and causing leakage or even piping.

Description

Technical Field

[0001] This utility model belongs to the field of building construction technology, and in particular relates to a seepage-proof connection structure between a steel-cement-soil mixing wall and a cement-soil pile. Background Technology

[0002] When using SMW (steel-cement-soil mixing wall) piles in coastal areas, the interface between the steel section (H-beam) and the surrounding cement-soil mixing piles is a weak point in seepage prevention. Due to soft soil creep, material shrinkage, and construction disturbance, tiny gaps are easily generated between the steel section and the cement-soil, causing groundwater in the high-water-level sand layer to seep into the foundation pit along the gaps, leading to leakage or even piping risks. Traditional methods rely solely on the frictional resistance between the steel section and the cement-soil, lacking active seepage prevention design.

[0003] Therefore, it is necessary to provide a new seepage-proof connection structure between the steel-cement-soil mixing wall and the cement-soil pile to solve the above-mentioned technical problems. Utility Model Content

[0004] The technical problem solved by this utility model is to provide a dual anti-seepage mechanism of "groove interlocking + secondary grouting", which can significantly reduce the interfacial permeability coefficient. The mechanical interlocking structure can physically block the seepage path, and the secondary grouting actively fills the micro-cracks. The combination of the two can effectively solve the leakage problem caused by relying solely on frictional resistance in traditional methods. It can meet the anti-seepage requirements under complex geological conditions such as high water level sand layers, and reduce the risk of groundwater seeping into the foundation pit and causing leakage or even piping. This anti-seepage connection structure of steel cement soil mixing wall and cement soil pile can meet the anti-seepage requirements under complex geological conditions such as high water level sand layers.

[0005] To solve the above-mentioned technical problems, the anti-seepage connection structure between the steel-cement-soil mixing wall and the cement-soil pile provided by this utility model includes: a pile body, an H-beam, and a grouting mechanism. The H-beam is pre-embedded on the pile body, and the grouting mechanism is provided on the H-beam.

[0006] The grouting mechanism includes a grouting pipe, a grout discharge pipe, a first fixing collar, a second fixing collar, and a fixing assembly. The grouting pipe is welded to the H-beam along its length, and the top of the grouting pipe extends above the top of the pile.

[0007] The top end of the grouting pipe is provided with a grout discharge pipe. The first fixing collar and the second fixing collar are respectively fixedly sleeved on the ends of the grouting pipe and the grout discharge pipe that are close to each other. The first fixing collar and the second fixing collar are connected and fixed by a fixing component.

[0008] As a further embodiment of this utility model, the surface of the H-beam is coated with an interface water-stop layer, the thickness of the interface water-stop layer is 1-2 mm, and the interface water-stop layer is an epoxy resin permeation layer.

[0009] As a further embodiment of this utility model, the flange and web surfaces of the H-beam are transversely machined with multiple grooves, the spacing between the multiple grooves is 200-300mm, the depth of the grooves is 3-5mm, and the shape of the grooves is trapezoidal or wavy.

[0010] As a further embodiment of this utility model, both the first and second fixing collars are provided with a plurality of corresponding limiting holes. The fixing assembly includes a plurality of T-shaped inserts, a rotating ring, a plurality of mounting rods and a plurality of arc-shaped inserts. One end of each of the plurality of T-shaped inserts passes through the plurality of limiting holes on the first and second fixing collars and is adapted to the plurality of limiting holes.

[0011] As a further embodiment of this utility model, the T-shaped insert has a second limiting insertion hole, the rotating ring is fixedly sleeved on the grouting pipe, multiple mounting rods are installed in a ring array on the top of the rotating ring, and multiple arc-shaped inserts are respectively installed on multiple mounting rods, the arc-shaped inserts being adapted to the second limiting insertion hole.

[0012] As a further embodiment of this utility model, the rotating ring is provided with multiple through grooves, and the outer wall of the rotating ring is formed with multiple handle blocks through the multiple through grooves. The top end of the grouting pipe is provided with a sealing groove, and the end of the grout discharge pipe near the grouting pipe is provided with a through groove to form an insertion end. A sealing ring is installed on the insertion end, and the sealing ring is adapted to the sealing groove.

[0013] Compared with related technologies, the seepage-proof connection structure between the steel-cement-soil mixing wall and the cement-soil pile provided by this utility model has the following advantages:

[0014] 1. This utility model can significantly reduce the interfacial permeability coefficient through a dual anti-seepage mechanism of "groove interlocking + secondary grouting". The mechanical interlocking structure can physically block the seepage path, and the secondary grouting actively fills the micro-cracks. The combination of the two can effectively solve the leakage problem caused by relying solely on frictional resistance in traditional methods. It can meet the anti-seepage requirements under complex geological conditions such as high water level sand layers and reduce the risk of groundwater seeping into the foundation pit and causing leakage or even piping.

[0015] 2. This utility model achieves pre-embedded installation by welding the grouting pipe to the H-beam along its length, eliminating the need for additional drilling during construction and reducing construction steps. Grouting can be completed at the pile top without affecting the excavation progress. Furthermore, the fixing ring one and fixing ring two are connected and fixed by a fixing component, facilitating the rapid assembly and disassembly of the grouting pipe and the grout discharge pipe, thus improving construction efficiency. Attached Figure Description

[0016] To facilitate understanding by those skilled in the art, the present invention will be further described below with reference to the accompanying drawings.

[0017] Figure 1 This is a schematic diagram of the present invention;

[0018] Figure 2 This is an assembly diagram of part of the grouting mechanism in this utility model;

[0019] Figure 3 for Figure 2 A magnified structural diagram of part A in the middle;

[0020] Figure 4 This is an assembly diagram of the grouting pipe, grout discharge pipe, and fixing components in this utility model;

[0021] Figure 5 This is a schematic diagram of the assembly of the grouting pipe, the grout discharge pipe and the sealing ring in this utility model.

[0022] In the diagram: 1. Pile body; 2. H-beam; 21. Interface waterstop layer; 22. Groove; 3. Grouting pipe; 4. Grout discharge pipe; 5. Fixing collar one; 6. Fixing collar two; 7. T-shaped insert rod; 8. Rotating ring; 9. Installation rod; 10. Arc-shaped insert rod; 12. Through groove one; 13. Handle block; 14. Sealing groove; 15. Through groove two; 16. Sealing ring. Detailed Implementation

[0023] Please refer to the following: Figures 1 to 5 ,in, Figure 1 This is a schematic diagram of the present invention; Figure 2 This is an assembly diagram of part of the grouting mechanism in this utility model; Figure 3 for Figure 2 A magnified structural diagram of part A in the middle; Figure 4 This is an assembly diagram of the grouting pipe, grout discharge pipe, and fixing components in this utility model; Figure 5 This is a schematic diagram of the assembly of the grouting pipe, grout discharge pipe, and sealing ring in this utility model. The seepage-proof connection structure between the steel-cement-soil mixing wall and the cement-soil pile includes: pile body 1, H-beam 2, and grouting mechanism. The H-beam 2 is pre-embedded and installed on the pile body 1, and the grouting mechanism is provided on the H-beam 2.

[0024] The grouting mechanism includes a grouting pipe 3, a grout discharge pipe 4, a first fixing ring 5, a second fixing ring 6, and a fixing assembly. The grouting pipe 3 is welded to the H-beam 2 along the length of the H-beam 2, and the top end of the grouting pipe 3 extends above the top of the pile.

[0025] The top end of the grouting pipe 3 is provided with a grout discharge pipe 4. The first fixing ring 5 and the second fixing ring 6 are respectively fixedly sleeved on the ends of the grouting pipe 3 and the grout discharge pipe 4 that are close to each other. The first fixing ring 5 and the second fixing ring 6 are connected and fixed by a fixing component.

[0026] The surface of the H-beam 2 is coated with an interface water-stop layer 21, the thickness of which is 1-2 mm, and the interface water-stop layer 21 is an epoxy resin permeation layer.

[0027] The flange and web surfaces of the H-beam 2 are transversely machined with multiple grooves 22, the spacing between the multiple grooves 22 is 200-300mm, the depth of the grooves 22 is 3-5mm, and the shape of the grooves is trapezoidal or wavy.

[0028] Both the first fixed collar 5 and the second fixed collar 6 are provided with multiple corresponding limiting holes. The fixing assembly includes multiple T-shaped inserts 7, a rotating ring 8, multiple mounting rods 9 and multiple arc-shaped inserts 10. One end of each of the multiple T-shaped inserts 7 passes through the multiple limiting holes 1 on the first fixed collar 5 and the second fixed collar 6 and is adapted to the multiple limiting holes 1.

[0029] The T-shaped insert 7 has a second limiting insertion hole. The rotating ring 8 is fixedly sleeved on the grouting pipe 3. Multiple mounting rods 9 are arranged in a ring array on the top of the rotating ring 8. Multiple arc-shaped inserts 10 are respectively installed on multiple mounting rods 9. The arc-shaped inserts 10 are adapted to the second limiting insertion hole.

[0030] The rotating ring 8 has multiple through grooves 12, and the outer wall of the rotating ring 8 forms multiple handle blocks 13 through the multiple through grooves 12. The top end of the grouting pipe 3 has a sealing groove 14, and the end of the grout discharge pipe 4 near the grouting pipe 3 has a through groove 2 15 to form an insertion end. The insertion end is equipped with a sealing ring 16, and the sealing ring 16 is adapted to the sealing groove 14.

[0031] When connecting the grouting pipe 3 and the grout discharge pipe 4, the insertion end on the grout discharge pipe 4 drives the sealing ring 16 to be inserted into the grouting pipe 3 and tightly fits against the inner wall of the sealing groove 14. Then, the T-shaped insert 7 is passed through the limiting insertion hole 1 on the fixing collar 1 5 and the fixing collar 2 6. Finally, the rotating ring 8 is rotated by the handle block 13, which drives the installation rod 9 and the arc-shaped insert 10 to rotate. The arc-shaped insert 10 is inserted into the limiting insertion hole 2 on the T-shaped insert to form a fixation, which makes the structure simple and facilitates the disassembly, assembly, connection and fixation of the grouting pipe 3 and the grout discharge pipe.

[0032] The working principle of the seepage-proof connection structure between the steel-cement-soil mixing wall and the cement-soil pile provided by this utility model is as follows:

[0033] The first step: The flange and web of the H-beam 2 are machined with transverse grooves 22, with a depth of 3-5mm and a spacing of 200-300mm. When the H-beam 2 is pre-embedded in the pile body 1, after the cement soil hardens, its grout will fill the grooves on the surface of the steel, forming a "raised groove" interlocking structure. This continuous concave-convex interlocking surface can effectively block the seepage path, while increasing the contact area and mechanical interlocking force between the steel and the cement soil, improving the interface shear strength, and reducing the relative slippage between the steel and the soil, thus playing a seepage prevention role from a physical structure perspective.

[0034] The second step: Weld the grouting pipe along the length of H-beam 2 to provide a channel for secondary grouting. During the curing period after the completion of the SMW method pile construction, after the cement soil has initially set (about 24 hours), inject ultrafine cement-water glass grout (water-cement ratio 0.8:1, water glass content 5%) through grouting pipe 3. The grouting pressure is controlled at 0.3-0.5MPa until grout returns to the top of the pile. This fast-setting micro-expansion grout can penetrate and fill the micro-cracks caused by soft soil creep, material shrinkage and construction disturbance at the interface between the steel and cement soil, forming a continuous seepage-proof layer and actively compensating for possible leakage hazards.

[0035] The third step: The surface of H-beam 2 is coated with an epoxy resin penetrating layer with a thickness of 1-2mm as an interface water-stopping layer. The epoxy resin layer not only improves the surface roughness of the steel section, enhances the chemical bonding force between it and the cement soil, and reduces the risk of interface separation, but also forms a protective film on the surface of the steel section, reducing the corrosion of the steel section by the coastal salt spray environment, and further ensuring the integrity and seepage prevention performance of the interface between the steel section and the cement soil.

[0036] All standard parts used can be purchased from the market, and can be customized according to the instructions and drawings. The specific connection methods of each part adopt conventional methods such as bolts, rivets, and welding that are mature in the existing technology. The machinery, parts and equipment adopt conventional models in the existing technology, and the structure and principle of the components known to those skilled in the art can be known by those skilled in the art through technical manuals or conventional experimental methods.

[0037] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions, and alterations can be made to these embodiments, or they can be used directly or indirectly, without departing from the principles and spirit of the present invention. In other related technical fields, the scope of the present invention is defined by the appended claims and their equivalents, and they are similarly included within the patent protection scope of the present invention.

Claims

1. A seepage-proof connection structure between a steel-concrete mixing wall and a cement-soil pile, characterized in that, include: The pile body, H-beams, and grouting mechanism are provided, wherein the H-beams are pre-embedded on the pile body and the grouting mechanism is provided on the H-beams; The grouting mechanism includes a grouting pipe, a grout discharge pipe, a first fixing collar, a second fixing collar, and a fixing assembly. The grouting pipe is welded to the H-beam along its length, and the top of the grouting pipe extends above the top of the pile. The top end of the grouting pipe is provided with a grout discharge pipe. The first fixing collar and the second fixing collar are respectively fixedly sleeved on the ends of the grouting pipe and the grout discharge pipe that are close to each other. The first fixing collar and the second fixing collar are connected and fixed by a fixing component.

2. The impervious connection structure of the reinforced soil-cement wall and the soil-cement pile according to claim 1, characterized in that: The surface of the H-beam is coated with an interface water-stopping layer, the thickness of which is 1-2 mm, and the interface water-stopping layer is an epoxy resin permeation layer.

3. The impervious connection structure of the reinforced soil-cement wall and the soil-cement pile according to claim 1, characterized in that: The flanges and webs of the H-beam are machined with multiple grooves in the transverse direction. The spacing between the grooves is 200-300mm, the depth of the grooves is 3-5mm, and the shape of the grooves is trapezoidal or wavy.

4. The impervious connection structure of the reinforced soil-cement wall and the soil-cement pile according to claim 1, characterized in that: Both the first and second fixed collars are provided with multiple corresponding limiting holes. The fixing assembly includes multiple T-shaped inserts, a rotating ring, multiple mounting rods, and multiple arc-shaped inserts. One end of each of the multiple T-shaped inserts passes through and is adapted to the multiple limiting holes on the first and second fixed collars.

5. The impervious connection structure of the reinforced soil-cement wall and the soil-cement pile according to claim 4, characterized in that: The T-shaped insert has a second limiting insertion hole. The rotating ring is fixedly sleeved on the grouting pipe. Multiple mounting rods are installed in a ring array on the top of the rotating ring. Multiple arc-shaped inserts are installed on multiple mounting rods respectively. The arc-shaped inserts are adapted to the second limiting insertion hole.

6. The impervious connection structure of the reinforced soil-cement wall and the soil-cement pile according to claim 4, characterized in that: The rotating ring has multiple through grooves, and the outer wall of the rotating ring forms multiple handle blocks through the multiple through grooves. The top end of the grouting pipe has a sealing groove, and the end of the grout discharge pipe near the grouting pipe has a through groove to form an insertion end. A sealing ring is installed on the insertion end, and the sealing ring is adapted to the sealing groove.

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