Anti-floating anchor cable waterproof structure and construction method thereof

Abstract

The present invention relates to the technical field of underground structure construction, and specifically to an anti-floating anchor cable waterproof structure and a construction method thereof. The anti-floating anchor cable waterproof structure comprises: an anchor cable body, one end of which is buried in a cement grouting body and passes through a concrete cushion layer, a first waterproof coating layer and a first flexible waterproof layer in sequence from bottom to top; a tensioning member, which is arranged on the first flexible waterproof layer and applies a compressive force to the first flexible waterproof layer, and the anchor cable body is locked after passing through the tensioning member. By arranging the first waterproof coating layer and the first flexible waterproof layer on the concrete cushion layer, the rigid concrete cushion layer and the flexible first flexible waterproof layer cooperate to waterproof, thereby avoiding water leakage caused by a large gap between the concrete cushion layer and the anchor cable body due to loosening of the concrete cushion layer during vertical stretching of the anchor cable body. After the anchor cable body is tensioned, the first flexible waterproof layer can still be tightly matched with the anchor cable body to ensure that no groundwater will seep out along the anchor cable body.

Description

Technical Field

[0001] The invention relates to the technical field of underground structure construction, and in particular to an anti-floating anchor cable waterproof structure and a construction method thereof. Background Art

[0002] With the emergence of more and more super high-rise buildings with basements, underground large shopping malls, underground pipe galleries, underground parking lots and other buildings, and the large-scale development of underground space buildings, the problem of groundwater buoyancy has gradually become an urgent problem to be solved in current structural design and construction. Prestressed anti-floating anchor cables are a vertical anchoring technology. Because prestress is applied to prestressed anchor cables, it can not only effectively prevent the basement floor from floating up under the action of groundwater buoyancy, but also the construction quality of each anchor cable can be inspected during the construction process, thereby ensuring the quality of the entire project.

[0003] In the prior art, there is an overlap in the construction of prestressed anti-floating anchor cables and the main structure foundation. The anti-floating anchor cables are poured into the underground structure through concrete during construction. After the prestressed anchor cables are tensioned, there is a large stress between the anchor cables and the concrete structure, which causes a large gap to form between the concrete structure and the anchor cables, causing groundwater leakage at the anchor cable installation position, affecting the use of underground buildings. Summary of the invention

[0004] Therefore, the technical problem to be solved by the present invention is to overcome the defect of the anchor cable installation position in the underground structure in the prior art that groundwater leakage is prone to occur, thereby providing an anti-floating anchor cable waterproof structure and a construction method thereof.

[0005] In order to solve the above technical problems, the present invention provides an anti-floating anchor cable waterproof structure, comprising:

[0006] The anchor cable body has one end buried in the cement grouting body and passes through the concrete cushion layer, the first waterproof coating layer and the first flexible waterproof layer from bottom to top in sequence;

[0007] The tensioning member is arranged on the first flexible waterproof layer, applies a compressive force to the first flexible waterproof layer, and the anchor cable body is locked after passing through the tensioning member.

[0008] Preferably, the first waterproof coating layer is provided with two layers, a second flexible waterproof layer is provided between the two first waterproof coating layers, and the first tensioning plate of the tensioning member is provided between the upper first waterproof coating layer and the second flexible waterproof layer.

[0009] Preferably, it also includes a second waterproof coating layer wrapped around the outer periphery of the anchor cable body, the second flexible waterproof layer is arranged on the outer periphery of the second waterproof coating layer, and the anchor cable body passes through the second waterproof coating layer.

[0010] Preferably, a sleeve is provided outside the anchor body, and the sleeve is buried in the concrete cushion layer.

[0011] Preferably, an impermeable cement slurry and a leak-proof layer are sequentially provided in the casing from bottom to top, and the leak-proof layer extends to the outside of the casing.

[0012] Preferably, a waterproof protective layer is provided on the first flexible waterproof layer, and the tensioning member is partially buried in the waterproof protective layer.

[0013] Preferably, there are multiple anchor cable bodies, which are arranged in parallel, a plurality of first tensioning holes are provided at the bottom of the tensioning member, a second tensioning hole is provided at the top of the tensioning member, and the multiple anchor cable bodies respectively pass through the plurality of first tensioning holes and extend from the second tensioning hole together, and a fixing member fixedly connected to the anchor cable body is installed on the top of the tensioning member.

[0014] The present invention also provides a method for constructing an anti-floating anchor cable waterproof structure, comprising the following steps:

[0015] Pour cement grouting body at the construction position of the anchor cable body, and bury one end of the anchor cable body in the cement grouting body;

[0016] A concrete cushion layer, a first waterproof coating layer and a first flexible waterproof layer are sequentially arranged above the cement grouting body;

[0017] Stress is applied to the anchor cable body, and a tensioning member is installed on the first flexible waterproof layer to fix the anchor cable body.

[0018] Preferably, the step of providing the concrete cushion layer comprises:

[0019] A casing is arranged outside the anchor cable body, and the casing part is inserted into the cement grouting body, and concrete is poured outside the casing to form a concrete cushion layer;

[0020] Anti-seepage cement slurry and leak-proof layer are poured in sequence in the casing, and the leak-proof layer extends to the outside of the casing.

[0021] Preferably, the step of providing the first waterproof coating layer comprises:

[0022] A first waterproof coating layer is applied on the concrete cushion layer, a second flexible waterproof layer with openings is passed through the anchor cable body, and a second waterproof coating layer is applied in the openings;

[0023] The first tensioning plate of the tensioning member is arranged on the second flexible waterproof layer and the second waterproof coating layer;

[0024] A second layer of the first waterproof coating is applied on the first pull plate.

[0025] The technical solution of the present invention has the following advantages:

[0026] 1. The anti-floating anchor cable waterproof structure provided by the present invention comprises: an anchor cable body, one end of which is buried in a cement grouting body and passes through a concrete cushion layer, a first waterproof coating layer and a first flexible waterproof layer from bottom to top in sequence; a tensioning member, which is arranged on the first flexible waterproof layer and applies a compressive force to the first flexible waterproof layer, and the anchor cable body is locked after passing through the tensioning member.

[0027] By arranging the first waterproof coating layer and the first flexible waterproof layer on the concrete cushion layer, the rigid concrete cushion layer and the flexible first flexible waterproof layer cooperate to prevent water leakage caused by a large gap between the concrete cushion layer and the anchor cable body due to the loosening of the concrete cushion layer during the vertical stretching of the anchor cable body. After the anchor cable body is tensioned, the first flexible waterproof layer can still be tightly matched with the anchor cable body to ensure that no groundwater will seep out along the anchor cable body.

[0028] 2. The anti-floating anchor cable waterproof structure provided by the present invention has two first waterproof coating layers, a second flexible waterproof layer is provided between the two first waterproof coating layers, and a first tensioning plate of the tensioning member is provided between the upper first waterproof coating layer and the second flexible waterproof layer. The second flexible waterproof layer and the first flexible waterproof layer are used to waterproof the connection between the anchor cable body and the concrete cushion layer at the same time, the tensioning member is used to compress the second flexible waterproof layer to ensure the connection stability of the second flexible waterproof layer, and the first flexible waterproof layer is used to cover the first tensioning plate to prevent groundwater from seeping along the first tensioning plate.

[0029] 3. The anti-floating anchor cable waterproof structure provided by the present invention further includes a second waterproof coating layer coated on the outer periphery of the anchor cable body, a second flexible waterproof layer is arranged on the outer periphery of the second waterproof coating layer, and the anchor cable body penetrates the second waterproof coating layer. The second waterproof coating layer is used to seal the anchor cable body to prevent groundwater seepage caused by a gap between the second flexible waterproof layer and the tensioning member.

[0030] 4. The anti-floating anchor cable waterproof structure provided by the present invention has an anti-seepage cement slurry and a leak-proof layer arranged in sequence from bottom to top in the casing, and the leak-proof layer extends outside the casing. By further arranging a waterproof structure around the anchor cable body, the airtightness around the anchor cable body is enhanced.

[0031] 5. The anti-floating anchor cable waterproof structure provided by the present invention has multiple anchor cable bodies, which are arranged in parallel. The bottom of the tensioning member is provided with multiple first tensioning holes, and the top of the tensioning member is provided with a second tensioning hole. The multiple anchor cable bodies respectively penetrate through the multiple first tensioning holes and then extend out of the second tensioning holes together. A fixing member fixedly connected to the anchor cable body is installed on the top of the tensioning member. By providing multiple first tensioning holes, it is avoided that multiple anchor cable bodies are interlaced, resulting in gaps between the anchor cable bodies that cannot be filled with concrete. Finally, multiple anchor cable bodies are extended from the second tensioning holes at the same time, and multiple anchor cable bodies are tensioned at the same time, ensuring that the structures around the multiple anchor cable bodies are stressed synchronously, avoiding excessive deformation differences caused by different stresses on the structures around different anchor cable bodies, which may cause the concrete structure around the anchor cable bodies to break.

[0032] 6. The construction method of the anti-floating anchor cable waterproof structure provided by the present invention includes the steps of setting a concrete cushion layer: installing a casing outside the anchor cable body, inserting the casing part into the cement grouting body, pouring concrete outside the casing to form a concrete cushion layer; pouring anti-seepage cement slurry and a leak-proof layer in the casing in sequence, and the leak-proof layer extends to the outside of the casing. By installing a casing outside the anchor cable body, it is possible to avoid the concrete impacting the anchor cable body and causing the anchor cable body to bend when pouring the concrete cushion layer, ensuring that the anchor cable body always remains in a vertical state, and reducing the deformation of the structure around the anchor cable body when applying tension to the anchor cable body. BRIEF DESCRIPTION OF THE DRAWINGS

[0033] In order to more clearly illustrate the specific implementation methods of the present invention or the technical solutions in the prior art, the drawings required for use in the specific implementation methods or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are some implementation methods of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0034] Figure 1 It is a schematic structural diagram of the anti-floating anchor cable waterproof structure provided in an embodiment of the present invention.

[0035] Figure 2 for Figure 1 Enlarged view of point A in the middle.

[0036] Figure 3 It is a schematic structural diagram of a tensioning member provided in an embodiment of the present invention.

[0037] Figure 4 for Figure 3 Cross-sectional view along the B-B direction.

[0038] Figure 5 for Figure 3 Cross-sectional view along the C-C direction.

[0039] Explanation of the accompanying drawings: 1. Anchor body; 2. Cement grouting body; 3. Concrete cushion layer; 4. First waterproof coating layer; 5. First flexible waterproof layer; 6. Second flexible waterproof layer; 7. Second waterproof coating layer; 8. Casing; 9. Anti-seepage cement slurry; 10. Leak-proof layer; 11. Waterproof protective layer; 12. First pull plate; 13. Second pull plate; 14. Angle steel; 15. First pull hole; 16. Second pull hole. DETAILED DESCRIPTION

[0040] The technical solution of the present invention will be described clearly and completely below in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0041] In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present invention. In addition, the terms "first", "second", and "third" are used for descriptive purposes only, and cannot be understood as indicating or implying relative importance.

[0042] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" 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 it can be indirectly connected 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.

[0043] In addition, the technical features involved in the different embodiments of the present invention described below can be combined with each other as long as they do not conflict with each other.

[0044] like Figures 1 to 5 The figure shows a specific embodiment of the anti-floating anchor cable waterproof structure provided by the present invention, comprising: an anchor cable body 1 which sequentially penetrates a concrete cushion layer 3, a first waterproof coating layer 4 and a first flexible waterproof layer 5 from bottom to top. The first waterproof coating layer 4 is a cement penetrating crystallized waterproof coating, and the first flexible waterproof layer 5 is a 4 mm thick SBS waterproof membrane.

[0045] like Figure 1As shown, the bottom of the anchor cable body 1 is buried in the cement grouting body 2. A tensioning member for applying a compressive force to the first flexible waterproof layer 5 is provided on the first flexible waterproof layer 5, and the anchor cable body 1 is locked after passing through the tensioning member. Figure 3 As shown, the tensioning member includes a first tensioning plate 12 and a second tensioning plate 13 arranged in parallel, and the first tensioning plate 12 and the second tensioning plate 13 are connected by four angle steels 14. Figure 2 As shown, the first waterproof coating layer 4 is provided with two layers, and a 3 mm thick SBS waterproof coiled material as the second flexible waterproof layer 6 is provided between the two first waterproof coating layers 4, and the first tensioning plate 12 of the tensioning member is provided between the upper first waterproof coating layer 4 and the second flexible waterproof layer 6. The outer periphery of the anchor cable body 1 is coated with a non-curing rubber asphalt waterproof coating as the second waterproof coating layer 7, and the second flexible waterproof layer 6 is provided on the outer periphery of the second waterproof coating layer 7, and the anchor cable body 1 penetrates the second waterproof coating layer 7. A casing 8 is provided on the outer casing of the anchor cable body 1, and the casing 8 is buried in the concrete cushion layer 3. The casing 8 is provided with an anti-seepage cement slurry 9 and a plugging layer 10 from bottom to top, and the plugging layer 10 extends to the outside of the casing 8. A waterproof protective layer 11 is provided on the first flexible waterproof layer 5, and the tensioning member is partially buried in the waterproof protective layer 11.

[0046] There are four anchor cable bodies 1, and the four anchor cable bodies 1 are arranged in parallel. Figure 5 As shown, the first tensioning plate 12 at the bottom of the tensioning member is provided with four first tensioning holes 15. Figure 4 As shown, a second tensioning hole 16 is provided on the second tensioning plate 13 at the top of the tensioning member, and the four anchor cable bodies 1 respectively pass through the four first tensioning holes 15 and extend out from the second tensioning hole 16 together. A four-hole anchor fixedly connected to the anchor cable body 1 as a fixing member is installed on the top of the tensioning member.

[0047] The anti-floating anchor cable waterproof structure provided in this embodiment separates the anchor cable body 1 from the concrete cushion layer 3 by using a casing 8, and then pours an anti-seepage cement slurry 9 and a leak-proofing layer 10 into the casing 8, so as to avoid the anchor cable body 1 driving the concrete cushion layer 3 to cause a large displacement and fracture when a tensioning force is applied to the anchor cable body 1. By applying a first waterproof coating layer 4 on the leak-proofing layer 10, laying an SBS waterproofing membrane, and setting a second waterproof coating layer 7 between the SBS waterproofing membrane and the anchor cable body 1, the gap around the anchor cable body 1 is further sealed while the SBS waterproofing membrane is fixed. The SBS waterproofing membrane is pressed by a tensioning member so that the SBS waterproofing membrane is stably laid on the concrete cushion layer 3. Then, a second waterproof coating layer 7 is applied around the first tensioning plate 12 and around the first tensioning hole 15, and an SBS waterproofing membrane is laid on the first tensioning plate 12, so as to further enhance the waterproof performance of the anti-floating anchor cable waterproof structure and prevent groundwater from seeping out of the gap along the first tensioning plate 12. The anti-floating anchor cable waterproof structure provided in this embodiment can effectively suppress the seepage of groundwater from the gap between the anchor cable body 1 and the surrounding connection structure, thereby ensuring the safety of the underground structure.

[0048] This embodiment also provides a specific implementation method of an anti-floating anchor cable waterproof structure construction method, comprising the following steps:

[0049] A cement grouting body 2 is poured at the construction position of the anchor cable body 1 , and one end of the four anchor cable bodies 1 is buried in the cement grouting body 2 .

[0050] A casing 8 is arranged outside the anchor body 1, and the casing 8 is partially inserted into the cement grouting body 2, and concrete is poured outside the casing 8 to form a concrete cushion 3. The inner diameter of the casing 8 is 1 cm larger than the diameter of the four-hole anchor used to fix the anchor body 1, and the height of the casing 8 outside the cement grouting body 2 is consistent with the height of the concrete cushion 3. After the curing strength of the concrete cushion 3 reaches 80%, the anti-seepage cement slurry 9 is poured in the casing 8 in sequence, and the top of the cement slurry is 2 cm away from the top of the casing 8. The casing 8 is continuously filled with plugging king as a plugging layer 10, and the plugging layer 10 extends to the outside of the casing 8.

[0051] Apply the first layer of cement penetrating crystalline waterproof coating on the concrete cushion 3, and pass the 3 mm thick SBS waterproof membrane with an opening on the anchor body 1. The diameter of the opening is 15 cm, and non-curing rubber asphalt waterproof coating is applied in the opening. Press and install the first tensioning plate 12 of the tensioning member on the 3 mm thick SBS waterproof membrane and non-curing rubber asphalt waterproof coating. Make the four anchor bodies 1 pass through the first tensioning plate 12 and the second tensioning plate 13 in sequence. Apply the second layer of cement penetrating crystalline waterproof coating on the first tensioning plate 12, and apply non-curing rubber asphalt waterproof coating on the edge of the first tensioning plate 12 and the contact position between the first tensioning plate 12 and the anchor body 1. Lay a 4 mm thick layer of SBS waterproof membrane on the non-curing rubber asphalt waterproof coating.

[0052] Stress is applied to the anchor cable body 1 , and a four-hole anchor is installed on the second tensioning plate 13 to fix the anchor cable body 1 .

[0053] The anti-floating anchor cable waterproof structure construction method provided in this embodiment standardizes the construction steps of the anti-floating anchor cable waterproof structure, first buries the first tensioning plate 12, and then waterproofs the first tensioning plate 12 to ensure the waterproof quality of the overall structure. Through the layered construction of the multi-layer structure and the strengthening construction of the waterproof structure around the anchor cable body 1, it can be ensured that after the tension force is applied to the anchor cable body 1, the structure around the anchor cable body 1 can still be in close contact with the anchor cable body 1, ensuring that groundwater will not seep out from around the anchor cable body 1.

[0054] Obviously, the above embodiments are merely examples for the purpose of clear explanation, and are not intended to limit the implementation methods. For those skilled in the art, other different forms of changes or modifications can be made based on the above description. It is not necessary and impossible to list all the implementation methods here. The obvious changes or modifications derived therefrom are still within the scope of protection of the invention.

Claims

1. An anti-floating anchor cable waterproof structure, characterized in that: include: An anchor cable body (1) has one end buried in the cement grouting body (2) and penetrates the concrete cushion layer (3), the first waterproof coating layer (4) and the first flexible waterproof layer (5) in sequence from bottom to top; the anchor cable body (1) is provided with a sleeve (8) on its outer shell, the sleeve (8) is buried in the concrete cushion layer (3), and the sleeve (8) is provided with an anti-seepage cement slurry (9) and a leak-proofing layer (10) in sequence from bottom to top, and the leak-proofing layer (10) extends to the outside of the sleeve (8); A tensioning member is provided on the first flexible waterproof layer (5) and applies a compressive force to the first flexible waterproof layer (5); the anchor cable body (1) penetrates the tensioning member and is then locked; a waterproof protective layer (11) is provided on the first flexible waterproof layer (5); and the tensioning member is partially buried in the waterproof protective layer (11); The anchor cable body (1) is provided in plurality, and the plurality of anchor cable bodies (1) are arranged in parallel, the bottom of the tensioning member is provided with a plurality of first tensioning holes (15), the top of the tensioning member is provided with a second tensioning hole (16), the plurality of anchor cable bodies (1) respectively penetrate through the plurality of first tensioning holes (15) and extend out of the second tensioning hole (16) together, and a fixing member fixedly connected to the anchor cable body (1) is installed on the top of the tensioning member; The first waterproof coating layer (4) is provided with two layers, a second flexible waterproof layer (6) is provided between the two layers of the first waterproof coating layer (4), and the first tensioning plate (12) of the tensioning member is provided between the upper first waterproof coating layer (4) and the second flexible waterproof layer (6); It also comprises a second waterproof coating layer (7) covering the outer periphery of the anchor cable body (1), the second flexible waterproof layer (6) being arranged on the outer periphery of the second waterproof coating layer (7), and the anchor cable body (1) passing through the second waterproof coating layer (7).

2. A construction method for the anti-floating anchor cable waterproof structure according to claim 1, characterized in that: The following steps are involved: Casting a cement grouting body (2) at the construction position of the anchor cable body (1), and burying one end of the anchor cable body (1) in the cement grouting body (2); A concrete cushion layer (3), a first waterproof coating layer (4) and a first flexible waterproof layer (5) are sequentially arranged above the cement grouting body (2); Stress is applied to the anchor cable body (1), and a tensioning member is installed on the first flexible waterproof layer (5) to fix the anchor cable body (1).

3. The construction method of the anti-floating anchor cable waterproof structure according to claim 2 is characterized in that: The steps of providing the concrete cushion layer (3) include: A sleeve (8) is arranged outside the anchor cable body (1), and a portion of the sleeve (8) is inserted into the cement grouting body (2), and concrete is poured outside the sleeve (8) to form a concrete cushion layer (3); An anti-seepage cement slurry (9) and a leak-proof layer (10) are sequentially poured inside the casing (8), and the leak-proof layer (10) extends to the outside of the casing (8).

4. The construction method of the anti-floating anchor cable waterproof structure according to claim 2 or 3, characterized in that: The step of providing the first waterproof coating layer (4) comprises: A first waterproof coating layer (4) is applied on the concrete cushion layer (3), a second flexible waterproof layer (6) provided with an opening is passed through the anchor cable body (1), and a second waterproof coating layer (7) is applied in the opening; The first tensioning plate (12) of the tensioning member is arranged on the second flexible waterproof layer (6) and the second waterproof coating layer (7); A second first waterproof coating layer (4) is applied on the first pull plate (12).

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