A water-stop sheet pile retaining structure and construction method

Abstract

The present invention relates to the technical field of sheet pile support construction, and particularly relates to a water-stop sheet pile support structure and a construction method. The sheet pile support structure of the present invention includes a bottom plate and a surrounding plate. The surrounding plate is installed in a groove on the upper surface of the bottom plate by insertion. Concrete is filled in the cavity formed by the bottom plate and the surrounding plate. A top plate is provided at the top of the surrounding plate. The top plate and the bottom plate are fixedly connected by inserting a support rod. The surrounding plate is a segmented splicing structure, and the surrounding plates are fixedly connected by inserting connection blocks. Externally, the waterproof function of the sheet pile support is realized by using a waterproof surrounding plate, and internally, the function of the sheet pile for retaining soil is realized by pouring concrete. At the same time, the surrounding plate can be directly used as a formwork for concrete pouring without disassembly, which is convenient for subsequent construction. A auger is installed on the top plate, which is beneficial to reuse and convenient for installation and disassembly.

Description

Technical Field

[0001] The present invention relates to the technical field of sheet pile support construction, and particularly relates to a water-stop sheet pile support structure and a construction method thereof. Background Art

[0002] With the rapid development of underground transportation and the continuous construction of underground shopping malls and municipal facilities, due to the influence of the original ground building facilities, simple slope excavation during underground construction can no longer meet the actual engineering requirements. Subsequently, various forms of retaining structures have emerged. The most core problem in foundation pit engineering is the reasonable design of the retaining system, which should not only play a role in retaining soil but also prevent soil and water loss outside the foundation pit, and control the ground settlement and horizontal displacement around the foundation pit within the allowable range. Currently, precast sheet piles are mostly used for foundation pit support in engineering.

[0003] In related technologies, pure steel sheet pile support is mostly used for sheet pile support. In order to improve the strength of the steel sheet pile support, the steel sheet is manufactured into a multi-folded steel sheet, but its waterproof performance is low during installation, the installation process is complex, and the maintenance cost is high. Summary of the Invention

[0004] In order to provide a sheet pile support structure with effective waterproofing and high strength, and at the same time improve the construction efficiency and construction quality, the present invention provides a water-stop sheet pile support structure and a construction method thereof.

[0005] On the one hand, a water-stop sheet pile support structure provided by the present invention adopts the following technical solutions:

[0006] A water-stop sheet pile support structure includes a bottom plate and a surrounding plate. The surrounding plate is installed in a groove on the upper surface of the bottom plate by plugging. Concrete is filled in the cavity formed by the bottom plate and the surrounding plate. A top plate is provided at the top of the surrounding plate, and the top plate and the bottom plate are fixedly connected by plugging a support rod. A screw conveyor is arranged in the cavity formed by the bottom plate, the surrounding plate and the top plate, and the screw conveyor is slidably connected to the top plate.

[0007] By adopting the above technical solutions, both the bottom plate and the surrounding plate are connected by plugging, which is convenient for installation. Concrete is used in the middle to enhance the anti-extrusion strength of the sheet pile support. The surrounding plate is assembled in blocks, which is convenient for prefabrication and processing of the surrounding plate.

[0008] Preferably, the surrounding plate is a split splicing structure. The blocks of the surrounding plate are fixedly connected by plugging a connecting block. The connecting block is of an I-shaped structure, and an embedded block is arranged between the connecting block and the surrounding plate.

[0009] By adopting the above technical solutions, the split surrounding plates are connected by the connecting block, which improves the plugging stability of the surrounding plate. At the same time, it is beneficial to do waterproof treatment at the connecting block, and the embedded block further improves the sealing performance of the connection between the connecting block and the surrounding plate.

[0010] Preferably, an adjusting bolt is installed on one side of the apron plate, and the adjusting bolt is threadedly connected to the bottom plate.

[0011] By adopting the above technical solution, the adjusting bolt is used to firmly install the apron plate and the bottom plate, so that the apron plate is closely attached to the bottom plate to prevent slurry leakage during grouting.

[0012] Preferably, an extrusion plate is padded at the contact between the adjusting bolt and the apron plate, and the extrusion plate is slidably connected to the bottom plate through a chute.

[0013] By adopting the above technical solution, the extrusion plate is used to prevent the adjusting bolt from damaging the bottom plate and the apron plate under pressure, and at the same time provides a larger extrusion area for the apron plate.

[0014] Preferably, the apron plate includes a first anti-corrosion layer, a second anti-corrosion layer, a first strengthening layer, a second strengthening layer and a base material layer, and the first anti-corrosion layer, the second anti-corrosion layer, the first strengthening layer, the second strengthening layer and the base material layer are arranged in sequence from outside to inside.

[0015] Preferably, the material of the first anti-corrosion layer is nickel-chromium alloy, the material of the second anti-corrosion layer is Hastelloy alloy, the material of the first strengthening layer is high-carbon steel, the material of the second strengthening layer is ferro-aluminum alloy, and the material of the base material layer is high-manganese steel.

[0016] By adopting the above technical solution, by using the first corrosion-resistant layer and the second corrosion-resistant layer, the apron plate can have good corrosion resistance, avoiding the apron plate being corroded by substances in the external environment during long-term use, thereby improving the service life of the apron plate. By using the first high-strength layer and the second high-strength layer, the apron plate can have good strength, avoiding the apron plate being damaged under the influence of external forces, thereby improving the service life of the apron plate.

[0017] Preferably, a lifting ring is installed on the top plate, and a through hole is opened on the top plate.

[0018] By adopting the above technical solution, the lifting ring facilitates the hoisting and disassembly of the top plate.

[0019] On the other hand, a water-stop sheet pile support construction method provided by the present invention adopts the following technical solution:

[0020] A water-stop sheet pile support construction method includes the following construction steps:

[0021] Step 1: Groove the ground edge of the construction foundation pit and level the side wall of the foundation pit.

[0022] Step 2: Install the bottom plate at the ground edge of the foundation pit and install the apron plate on the bottom plate.

[0023] Step 3: Install the top plate on the installed and fixed apron plate and place the auger into the space between the apron plates.

[0024] Step 4: Grout the space between the sheathing plates, and start the auger to mix the concrete. The auger slides along the top plate.

[0025] Step 5: After the concrete is evenly mixed, remove the top plate and the auger.

[0026] Step 6: Wait for the concrete to solidify and perform curing treatment on the concrete.

[0027] By adopting the above technical solutions, the external waterproof sheathing plates are used to achieve the waterproof function of the sheet pile support, and the internal concrete is poured to achieve the function of the sheet pile for retaining soil. At the same time, the sheathing plates can be directly used as the formwork for concrete pouring without disassembly, which is convenient for subsequent construction. The auger is installed on the top plate, which is beneficial for reuse and convenient for installation and disassembly.

[0028] Preferably, after the sheathing plates are installed on the bottom plate in Step 2, waterproof and pressure tests are performed on the sheathing plates.

[0029] By adopting the above technical solutions, waterproof tests are performed on the sheathing plates to prevent excessive gaps between the sheathing plates caused by installation errors and ineffective waterproofing.

[0030] Preferably, when the sheathing plates are installed, waterproof adhesives are applied at the joints between the sheathing plates.

[0031] By adopting the above technical solutions, the waterproof adhesives are used to connect the sheathing plates and the connecting blocks, and at the same time, it is beneficial to fill the internal installation gaps.

[0032] In summary, the present invention has the following beneficial technical effects:

[0033] 1. Both the bottom plate and the sheathing plates are connected by plug-in methods, which is convenient for installation. The middle uses concrete to enhance the anti-extrusion strength of the sheet pile support. The sheathing plates are assembled in blocks, which is convenient for prefabrication of the sheathing plates. The connecting blocks are used to connect the segmented sheathing plates, improving the plug-in stability of the sheathing plates. At the same time, it is beneficial to perform waterproof treatment at the connecting blocks, and the embedded blocks further improve the sealing between the connecting blocks and the sheathing plates.

[0034] 2. The adjusting bolts are used to fasten and install the sheathing plates and the bottom plate, making the sheathing plates close to the bottom plate to prevent grout leakage during grouting. The extrusion plate is used to prevent damage to the bottom plate and the sheathing plates caused by the pressure of the adjusting bolts, and at the same time provides a larger extrusion area for the sheathing plates. The lifting rings are convenient for hoisting and disassembling the top plate.

[0035] 3. By using the first corrosion-resistant layer and the second corrosion-resistant layer, the retaining plate can have good corrosion resistance, preventing the retaining plate from being corroded by substances in the external environment during long-term use, thereby improving the service life of the retaining plate. By using the first high-strength layer and the second high-strength layer, the retaining plate can have good strength, preventing the retaining plate from being damaged by external forces, thereby improving the service life of the retaining plate.

[0036] 4. The waterproof function of the sheet pile support is realized by using a waterproof material for the outer retaining plate, and the function of the sheet pile for retaining soil is realized by pouring concrete inside. At the same time, the retaining plate can be directly used as a formwork for concrete pouring without disassembly, which is convenient for subsequent construction. The top plate is installed with a screw conveyor, which is beneficial for reuse and convenient for installation and disassembly. A waterproof test is carried out on the retaining plate to prevent the gap of the retaining plate from being too large due to installation errors and failing to achieve the waterproof effect. The waterproof adhesive is used to connect the retaining plate and the connecting block, and at the same time, it is beneficial for filling the internal installation gap. BRIEF DESCRIPTION OF THE DRAWINGS

[0037] Figure 1 is a schematic diagram of the installation structure of the present invention;

[0038] Figure 2 is Figure 1 an enlarged schematic view of part A of

[0039] Figure 3 is a schematic diagram of the splicing of the retaining plate of the present invention;

[0040] Figure 4 is a schematic diagram of the structure of the retaining plate of the present invention.

[0041] Description of the Reference Numerals:

[0042] 1. Bottom plate, 11. Adjusting bolt, 12. Chute, 13. Extrusion plate, 2. Retaining plate, 21. Connecting block, 22. Embedded block, 201. First anti-corrosion layer, 202. Second anti-corrosion layer, 203. First strengthening layer, 204. Second strengthening layer, 205. Substrate layer, 3. Top plate, 31. Hoisting ring, 4. Support rod, 5. Screw conveyor. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0043] The following further describes the present invention in detail Figures 1-4 with reference to the accompanying drawings.

[0044] Embodiment 1:

[0045] The embodiment of the present invention discloses a water-stop sheet pile support structure. Refer to Figure 1 and 3, including a bottom plate 1 and a surrounding plate 2. The surrounding plate 2 is installed in the groove on the upper surface of the bottom plate 1 by plugging. The cavity formed by the bottom plate 1 and the surrounding plate 2 is filled with concrete. A top plate 3 is provided at the top of the surrounding plate 2. The top plate 3 and the bottom plate 1 are fixedly connected by plugging a support rod 4. An auger 5 is arranged in the cavity formed by the bottom plate 1, the surrounding plate 2 and the top plate 3. The auger 5 is slidably connected to the top plate 3.

[0046] The implementation mode of Embodiment 1 is as follows:

[0047] During installation, the surrounding plate 2 slides from one end of the connecting block 21 and is plugged and installed with the connecting block 21. The support rods 4 are installed in the blind holes opened at the edges of the bottom plate 1 and the top plate 3 and are arranged at intervals in the row direction.

[0048] Embodiment 2:

[0049] Based on Embodiment 1, it is increased by:

[0050] Referring to Figure 3 , the surrounding plate 2 is a split and spliced structure. The blocks of the surrounding plate 2 are fixedly connected by plugging a connecting block 21. The connecting block 21 is of an I-shaped structure. An inlaid block 22 is arranged between the connecting block 21 and the surrounding plate 2.

[0051] The connection shape between the connecting block 21 and the surrounding plate 2 adopts a dovetail shape.

[0052] Referring to Figure 1 and 2 , an adjusting bolt 11 is installed on one side of the surrounding plate 2. The adjusting bolt 11 is threadedly connected to the bottom plate 1.

[0053] The adjusting bolts 11 are evenly arranged at the two side edges of the bottom plate 1.

[0054] A pressing plate 13 is padded at the contact position between the adjusting bolt 11 and the surrounding plate 2. The pressing plate 13 is slidably connected to the bottom plate 1 through a sliding groove 12.

[0055] Referring to Figure 4 , the surrounding plate 2 includes a first anti-corrosion layer 201, a second anti-corrosion layer 202, a first strengthening layer 203, a second strengthening layer 204 and a base material layer 205. The first anti-corrosion layer 201, the second anti-corrosion layer 202, the first strengthening layer 203, the second strengthening layer 204 and the base material layer 205 are arranged in sequence from the outside to the inside.

[0056] The material of the first anti-corrosion layer 201 is nickel-chromium alloy. The material of the second anti-corrosion layer 202 is Hastelloy. The material of the first strengthening layer 203 is high-carbon steel. The material of the second strengthening layer 204 is iron-aluminum alloy. The material of the base material layer 205 is high-manganese steel.

[0057] Referring to Figure 1, a lifting ring 31 is installed on the top plate 3, and through holes are formed in the top plate 3.

[0058] The through holes formed in the top plate 3 include a auger 5 installation hole and a grouting hole, and the auger 5 installation hole and the grouting hole are uniformly arranged on the top plate 3.

[0059] The implementation manner of Embodiment 2 is as follows:

[0060] Based on the implementation manner of Embodiment 1, the following is added:

[0061] By rotating the adjusting bolt 11, the adjusting bolt 11 pushes the pressing plate 13 to tightly press the enclosing plate 2 and the bottom plate 1 together.

[0062] During processing, the first anti-corrosion layer 201, the second anti-corrosion layer 202, the first strengthening layer 203, the second strengthening layer 204 and the base material layer 205 are laminated together by welding and bolts.

[0063] Embodiment 3:

[0064] The embodiment of the present invention discloses a construction method for a water-stop sheet pile support, including the following construction steps:

[0065] Step 1: Groove the ground edge of the construction foundation pit and level the side wall of the foundation pit;

[0066] Step 2: Install the bottom plate 1 at the ground edge of the foundation pit and install the enclosing plate 2 on the bottom plate 1;

[0067] Step 3: Install the top plate 3 on the installed and fixed enclosing plate 2 and place the auger 5 into the space between the enclosing plates 2;

[0068] Step 4: Grout the space between the enclosing plates 2 and start the auger 5 to stir the concrete, and the auger 5 slides along the top plate 3;

[0069] Step 5: After the concrete is evenly stirred, remove the top plate 3 and the auger 5;

[0070] Step 6: Wait for the concrete to solidify and perform curing treatment on the concrete.

[0071] After installing the enclosing plate 2 on the bottom plate 1 in Step 2, perform waterproof and pressure tests on the enclosing plate 2.

[0072] When installing the enclosing plate 2, apply a waterproof adhesive at the joint between the enclosing plates 2.

[0073] The above are all the preferred embodiments of the present invention. The protection scope of the present invention is not limited thereby. Therefore, all equivalent changes made according to the structure, shape and principle of the present invention should be covered within the protection scope of the present invention.

Claims

1. A construction method for a water-stop sheet pile support, characterized in that: It includes a bottom plate (1) and a surrounding plate (2). The surrounding plate (2) is installed in a groove on the upper surface of the bottom plate (1) by insertion. The cavity formed by the bottom plate (1) and the surrounding plate (2) is filled with concrete; A top plate (3) is provided at the top of the surrounding plate (2). The top plate (3) and the bottom plate (1) are fixedly connected by inserting a support rod (4); An auger (5) is arranged in the cavity formed by the bottom plate (1), the surrounding plate (2) and the top plate (3). The auger (5) is slidably connected to the top plate (3); The surrounding plate (2) is a split splicing structure. The blocks of the surrounding plate (2) are fixedly connected by inserting a connecting block (21). The connecting block (21) is an I-shaped structure. An embedded block (22) is arranged between the connecting block (21) and the surrounding plate (2); It includes the following construction steps: Step 1: Groove the ground edge of the construction foundation pit and level the side wall of the foundation pit; Step 2: Install the bottom plate (1) at the ground edge of the foundation pit and install the surrounding plate (2) on the bottom plate (1); Step 3: Install the top plate (3) on the installed and fixed surrounding plate (2) and place the auger (5) into the space between the surrounding plates (2); Step 4: Grout the space between the surrounding plates (2) and start the auger (5) to stir the concrete. The auger (5) slides along the top plate (3); Step 5: After the concrete is evenly stirred, remove the top plate (3) and the auger (5); Step 6: Wait for the concrete to solidify and perform curing treatment on the concrete.

2. A construction method for a water-stop sheet pile support according to claim 1, characterized in that: An adjusting bolt (11) is installed on one side of the surrounding plate (2). The adjusting bolt (11) is threadedly connected to the bottom plate (1).

3. A construction method for a water-stop sheet pile support according to claim 2, characterized in that: An extrusion plate (13) is padded at the contact between the adjusting bolt (11) and the surrounding plate (2). The extrusion plate (13) is slidably connected to the bottom plate (1) through a chute (12).

4. A construction method for a water-stop sheet pile support according to claim 1, characterized in that: The surrounding plate (2) includes a first anti-corrosion layer (201), a second anti-corrosion layer (202), a first strengthening layer (203), a second strengthening layer (204) and a base material layer (205). The first anti-corrosion layer (201), the second anti-corrosion layer (202), the first strengthening layer (203), the second strengthening layer (204) and the base material layer (205) are arranged in sequence from outside to inside.

5. A construction method for a water-stop sheet pile support according to claim 4, characterized in that: The material of the first anti-corrosion layer (201) is nickel-chromium alloy, the material of the second anti-corrosion layer (202) is Hastelloy alloy, the material of the first strengthening layer (203) is high-carbon steel, the material of the second strengthening layer (204) is ferro-aluminum alloy, and the material of the base material layer (205) is high-manganese steel.

6. A construction method for a water-stop sheet pile support according to claim 1, characterized in that: A lifting ring (31) is installed on the top plate (3), and a through hole is formed in the top plate (3).

7. A construction method for water-stop sheet pile support according to claim 1, characterized in that: after the installation of the retaining plate (2) on the bottom plate (1) in step two, waterproof and pressure tests are carried out on the retaining plate (2).

8. A construction method for water-stop sheet pile support according to claim 1, characterized in that: when the retaining plates (2) are installed, a waterproof adhesive is applied to the joints between the retaining plates (2).

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