Water stop structure of diagonal bracing grouting steel pipe penetrating through outer wall and construction method of water stop structure

Abstract

The invention relates to the technical field of foundation pit supporting, in particular to a water stop structure of an inclined strut grouting steel pipe penetrating through an outer wall and a construction method of the water stop structure. The water stopping structure is used for preventing water of the part, embedded in the outer wall of a foundation pit, of a diagonal bracing steel pipe and comprises an outer side water stopping steel sheet fixedly arranged on the outer surface of the diagonal bracing steel pipe at an angle, and the outer side water stopping steel sheet is vertically embedded in the outer wall of the foundation pit; and the inner side water stop steel sheet is fixedly arranged on the inner wall of the inclined strut steel pipe at an angle. The diagonal bracing steel pipe has the beneficial effects that the outer side water stop steel sheet is arranged to stop water on the outer surface of the diagonal bracing steel pipe, and the inner side water stop steel sheet is arranged to stop water in the diagonal bracing steel pipe. And by arranging the water stop strip which expands when meeting water, the water stop effect is further achieved in the inclined strut steel pipe.

Description

Technical Field

[0001] The invention relates to the technical field of foundation pit support, in particular to a water-stop structure with an oblique brace grouting steel pipe passing through an outer wall and a construction method thereof. Background Art

[0002] The construction technology of diagonal brace grouting steel pipe foundation pit support structure is a commonly used support structure construction method in foundation pit construction. This technology forms a stable support structure underground by pre-construction and post-concrete pouring to ensure the safety and smooth progress of foundation pit construction. However, since the diagonal brace steel pipe will form a through hole when passing through the outer wall, it will cause leakage problems, affecting the overall quality of the foundation pit project.

[0003] Therefore, the present invention proposes a water-stop structure with diagonally braced grouting steel pipes passing through an exterior wall and a construction method thereof. Summary of the invention

[0004] The purpose of the present invention is to overcome the defects of the prior art and provide a water-stop structure for a diagonal brace grouting steel pipe passing through an outer wall and a construction method thereof, so as to solve the problem that holes are formed when the existing diagonal brace steel pipe passes through the outer wall, thereby causing leakage and affecting the overall quality of the foundation pit project.

[0005] The present invention provides a water-stopping structure for a diagonal bracing steel pipe passing through an outer wall, and its technical solution is as follows: it is used for waterproofing the part of the diagonal bracing steel pipe buried in the outer wall of a foundation pit, and the water-stopping structure comprises: an outer water-stopping steel sheet fixed at an angle on the outer surface of the diagonal bracing steel pipe, and the outer water-stopping steel sheet is vertically buried in the outer wall of the foundation pit; and an inner water-stopping steel sheet fixed at an angle on the inner wall of the diagonal bracing steel pipe.

[0006] Furthermore, it also includes an annular water stop strip, which is located at the connection between the inner water stop steel sheet and the diagonal bracing steel pipe, and the water stop strip expands when it comes into contact with water.

[0007] Furthermore, it includes eight steel bars, which are fixed at intervals on the side of the inner water-stop steel sheet, the central axis of the steel bars is parallel to the central axis of the diagonal bracing steel pipe, and the water-stop strip is arranged between the steel bars and the inner wall of the diagonal bracing steel pipe.

[0008] Furthermore, slightly expansive concrete is poured in the diagonal bracing steel pipe, the slightly expansive concrete is located on one side of the inner water-stop steel sheet, and the water-stop strip and the steel bar are buried in the slightly expansive concrete.

[0009] Furthermore, the outer water-stop steel sheet includes two steel sheets with arc-shaped notches, and the notches of the two steel sheets cooperate to form an elliptical notch, and the elliptical notch is fixedly connected to the outer surface of the diagonal bracing steel pipe.

[0010] Furthermore, the inner water-stop steel sheet is oval in shape.

[0011] The present invention also provides a construction method for a water-stop structure of a diagonal brace grouting steel pipe passing through an outer wall, which specifically includes the following steps: before the construction of the outer wall of the foundation pit, the outer water-stop steel sheet is fixed at an angle to the outer surface of the diagonal brace steel pipe; after the installation of the outer water-stop steel sheet is completed, the outer wall of the foundation pit and the diagonal brace steel pipe are constructed; the diagonal brace steel pipe is cut open, the original concrete in the diagonal brace steel pipe is chiseled out, and the inner water-stop steel sheet is fixed at an angle to the inner wall of the diagonal brace steel pipe; and then the diagonal brace steel pipe is spliced.

[0012] Furthermore, before the diagonal bracing steel pipes are spliced, eight steel bars and water stop strips are provided, the eight steel bars are fixedly arranged at intervals on the side surfaces of the inner water stop steel sheet, and the water stop strips are inserted between the steel bars and the inner wall of the diagonal bracing steel pipes.

[0013] Furthermore, after the installation of the water stop strip is completed, slightly expansive concrete is provided, and the slightly expansive concrete is poured into the diagonal bracing steel pipe to fill the hollow area, and the steel bars and the water stop strip are buried.

[0014] Compared with the prior art, the present invention has the following beneficial effects:

[0015] By setting an outer water-stop steel sheet, a water-stopping effect is achieved on the outer surface of the diagonal bracing steel pipe, and by setting an inner water-stop steel sheet, a water-stopping effect is achieved inside the diagonal bracing steel pipe.

[0016] By providing a water stop strip that expands when exposed to water, a water stop effect is further achieved inside the diagonal steel pipe. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a side sectional view of the water-stop structure of the diagonal steel pipe passing through the exterior wall of the present invention.

[0018] Figures 2 to 3 It is a transverse cross-sectional view of the water-stopping structure of the diagonal steel pipe passing through the exterior wall of the present invention.

[0019] Legend: 1. Exterior wall of foundation pit; 2. Diagonal bracing steel pipe; 3. External waterstop steel sheet; 4. Internal waterstop steel sheet; 5. Rebar; 6. Waterstop strip; 7. Slightly expanding concrete. DETAILED DESCRIPTION

[0020] The present invention will be further described below in conjunction with the accompanying drawings and specific embodiments.

[0021] See also Figure 1The present invention provides a water-stopping structure for a diagonal brace steel pipe passing through an outer wall and a construction method thereof, which solves the problem that a hole is formed when the existing diagonal brace steel pipe passes through an outer wall, thereby causing leakage and affecting the overall quality of the foundation pit project. By setting an outer water-stopping steel sheet, it plays a role of water-stopping on the outer surface of the diagonal brace steel pipe, and by setting an inner water-stopping steel sheet, it plays a role of water-stopping inside the diagonal brace steel pipe. By setting a water-stopping strip that expands when exposed to water, it further plays a role of water-stopping inside the diagonal brace steel pipe.

[0022] The following is a description of a water-stop structure of a diagonally braced steel pipe passing through an exterior wall and a construction method thereof according to the present invention in conjunction with the accompanying drawings.

[0023] See also Figure 1 , showing a side cross-sectional view of a water-stop structure of the present invention in which a steel pipe passes through an exterior wall. Figures 2 to 3 , showing the transverse cross-sectional view of the water-stop structure of the diagonal steel pipe passing through the outer wall of the present invention. Figures 1 to 3 , a water-stop structure of a diagonally braced steel pipe passing through an exterior wall and a construction method thereof are described in the present invention.

[0024] like Figures 1 to 3 As shown, a water-stopping structure of a diagonal brace steel pipe passing through an outer wall of the present invention is used for waterproofing the part of the diagonal brace steel pipe 2 buried in the outer wall 1 of the foundation pit, and is characterized in that: the water-stopping structure comprises: an outer water-stopping steel sheet 3 fixed at an angle on the outer surface of the diagonal brace steel pipe 2, and the outer water-stopping steel sheet 3 is vertically buried in the outer wall 1 of the foundation pit; an inner water-stopping steel sheet 4 fixed at an angle on the inner wall of the diagonal brace steel pipe 2. The outer water-stopping steel sheet 3 and the inner water-stopping steel sheet 4 are both fixed to the diagonal brace steel pipe 2 by welding, and full welding is adopted.

[0025] In a preferred embodiment, the outer water-stop steel sheet 3 is a square steel sheet with a size of 600 mm in length and 600 mm in width.

[0026] In a preferred embodiment, the diameter of the diagonal bracing steel pipe 2 is 100 mm.

[0027] In a specific embodiment, an annular water stop strip 6 is further included, and the water stop strip 6 is located at the connection between the inner water stop steel sheet 4 and the diagonal bracing steel pipe 2, and the water stop strip 6 expands when it encounters water. By providing the water stop strip 6 that expands when it encounters water at the connection between the inner water stop steel sheet 4 and the diagonal bracing steel pipe 2, the interior of the diagonal bracing steel pipe 2 is further water-stopped.

[0028] In a preferred embodiment, the thickness of the inner water-stop steel sheet 4 is 8 mm.

[0029] In a specific embodiment, eight steel bars 5 are further included, and the eight steel bars 5 are fixedly arranged at intervals on the side of the inner water stop steel sheet 4, the central axis of the steel bar 5 is parallel to the central axis of the diagonal bracing steel pipe 2, and the water stop strip 6 is arranged between the steel bar 5 and the inner wall of the diagonal bracing steel pipe 2. By setting the central axis of the steel bar 5 and the central axis of the diagonal bracing steel bar 2 to be parallel to each other, the water stop strip 6 can be more conveniently installed in the gap between the steel bar 5 and the diagonal bracing steel pipe 2.

[0030] In a specific embodiment, slightly expansive concrete 7 is poured inside the diagonal bracing steel pipe 2 , the slightly expansive concrete 7 is located on one side of the inner water-stopping steel sheet 4 , and the water-stopping strip 6 and the steel bar 5 are buried in the slightly expansive concrete 7 .

[0031] In a specific embodiment, the outer water-stop steel sheet 3 includes two steel sheets with arc-shaped notches, and the notches of the two steel sheets cooperate to form an elliptical notch, and the elliptical notch is fixedly connected to the outer surface of the diagonal bracing steel pipe 2 .

[0032] In a specific embodiment, the inner water-stop steel sheet 4 is oval in shape.

[0033] In a specific implementation, the strength of the slightly expanding concrete 7 is equivalent to the strength of the foundation pit outer wall 1 .

[0034] The present invention also provides a construction method for a water-stop structure in which a diagonal brace grouting steel pipe passes through an outer wall, which specifically includes the following steps: before the construction of the foundation pit outer wall 1, the outer water-stop steel sheet 3 is fixed at an angle to the outer surface of the diagonal brace steel pipe 2; after the installation of the outer water-stop steel sheet 3 is completed, the foundation pit outer wall 1 and the diagonal brace steel pipe 2 are constructed; the diagonal brace steel pipe 2 is cut open, the original concrete in the diagonal brace steel pipe 2 is chiseled out, and the inner water-stop steel sheet 4 is fixed at an angle to the inner wall of the diagonal brace steel pipe 2; and then the diagonal brace steel pipe 2 is spliced.

[0035] In a specific embodiment, before the diagonal bracing steel pipe 2 is spliced, eight steel bars 5 and water stop strips 6 are provided, the eight steel bars 5 are fixed at intervals on the side of the inner water stop steel sheet 4, and the water stop strips 6 are inserted between the steel bars 5 and the inner wall of the diagonal bracing steel pipe 2.

[0036] In a specific implementation, after the water stop strip 6 is installed, a slightly expansive concrete 7 is provided and poured into the diagonal steel pipe 2 to fill the hollow area and bury the steel bars 5 and the water stop strip 6 .

[0037] The construction process of a water-stop structure of a diagonally braced grouting steel pipe passing through an exterior wall of the present invention is described in detail below.

[0038] Before the construction of the foundation pit outer wall 1, the outer water-stop steel sheet 3 is welded to the diagonal bracing steel pipe 2 by full welding.

[0039] Then the foundation pit outer wall 1 and the diagonal bracing steel pipe 2 are constructed.

[0040] After the construction of the foundation pit outer wall 1 is completed, the diagonal bracing steel pipe 2 is cut open, and the original concrete in the diagonal bracing steel pipe 2 is chiseled out. The inner water stop steel sheet 4 is welded to the inner wall of the diagonal bracing steel pipe 2, and then the steel bar 5 is welded to the inner water stop steel sheet 4, and the water stop strip 6 is inserted between the steel pipe 5 and the inner wall of the diagonal bracing steel pipe 2.

[0041] Then, the diagonal bracing steel pipes 2 are filled with the slightly expansive concrete 7, and after the slightly expansive concrete 7 reaches the designed strength, the diagonal bracing steel pipes 2 are spliced.

[0042] The present invention is described in detail above in conjunction with the embodiments of the accompanying drawings. A person skilled in the art can make various variations of the present invention according to the above description. Therefore, certain details in the embodiments should not constitute a limitation of the present invention, and the scope of protection of the present invention shall be defined by the scope of the attached claims.

Claims

1. A water-stop structure for a diagonal brace grouting steel pipe passing through an outer wall, used for waterproofing a portion of a diagonal brace steel pipe (2) buried in an outer wall (1) of a foundation pit, characterized in that: The water-stop structure includes: An outer water-stopping steel sheet (3) is fixedly mounted at an angle on the outer surface of the diagonal bracing steel pipe (2), and the outer water-stopping steel sheet (3) is vertically buried in the outer wall (1) of the foundation pit; An inner water-stopping steel sheet (4) is fixedly arranged at an angle on the inner wall of the diagonal bracing steel pipe (2).

2. A water-stopping structure of a diagonal braced grouting steel pipe passing through an exterior wall according to claim 1, characterized in that: It also includes an annular water stop strip (6), which is located at the connection between the inner water stop steel sheet (4) and the diagonal bracing steel pipe (2), and the water stop strip (6) expands when it comes into contact with water.

3. A water-stopping structure of a diagonal braced grouting steel pipe passing through an exterior wall according to claim 2, characterized in that: It also includes eight steel bars (5), which are fixedly arranged at intervals on the side of the inner water-stop steel sheet (4), the central axis of the steel bars (5) is parallel to the central axis of the diagonal bracing steel pipe (2), and the water-stop strip (6) is arranged between the steel bars (5) and the inner wall of the diagonal bracing steel pipe (2).

4. A water-stopping structure of a diagonal braced grouting steel pipe passing through an exterior wall according to claim 3, characterized in that: Micro-expansion concrete (7) is poured inside the diagonal bracing steel pipe (2), the micro-expansion concrete (7) is located on one side of the inner water-stop steel sheet (4), and the water-stop strip (6) and the steel bar (5) are buried in the micro-expansion concrete (7).

5. The waterproof structure of the diagonal brace grouting steel pipe passing through the exterior wall according to claim 1, characterized in that: The outer water-stop steel sheet (3) comprises two steel sheets with arc-shaped notches, the notches of the two steel sheets cooperate to form an elliptical notch, and the elliptical notch is fixedly connected to the outer surface of the diagonal bracing steel pipe (2).

6. A water-stopping structure of a diagonal braced grouting steel pipe passing through an exterior wall according to claim 1, characterized in that: The inner water-stop steel sheet (4) is oval in shape.

7. A construction method for a water-stop structure of a diagonal brace grouting steel pipe passing through an exterior wall according to claim 1, characterized in that: The specific steps include: Before the construction of the foundation pit outer wall (1), the outer water-stop steel sheet (3) is fixedly mounted at an angle on the outer surface of the diagonal bracing steel pipe (2); After the outer water-stop steel sheet (3) is installed, the foundation pit outer wall (1) and the diagonal bracing steel pipe (2) are constructed; The diagonal bracing steel pipe (2) is cut open, the original concrete in the diagonal bracing steel pipe (2) is chiseled out, and the inner water-stopping steel sheet (4) is fixedly arranged at an angle on the inner wall of the diagonal bracing steel pipe (2); Then the diagonal bracing steel pipes (2) are spliced.

8. The construction method of the water-stop structure of the diagonal brace grouting steel pipe passing through the exterior wall according to claim 7 is characterized in that: Before the diagonal bracing steel pipe (2) is spliced, eight steel bars (5) and water stop strips (6) are provided, the eight steel bars (5) are fixedly arranged at intervals on the side of the inner water stop steel sheet (4), and the water stop strip (6) is inserted between the steel bars (5) and the inner wall of the diagonal bracing steel pipe (2).

9. The construction method of the water-stop structure of the diagonal brace grouting steel pipe passing through the exterior wall according to claim 8, characterized in that: After the installation of the water stop strip (6) is completed, a micro-expansive concrete (7) is provided and poured into the diagonal bracing steel pipe (2) to fill the hollow area and bury the steel bars (5) and the water stop strip (6).

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