Connection and Hole-opening Method for the Diaphragm Wall on the Side of the Sewage Lift Pumping Station and the Inlet Water Box Culvert

Abstract

The invention discloses a connection and hole-opening method for a side diaphragm wall of a sewage lift pumping station and an inlet water box culvert. 1. Reinforcing beams and columns are arranged on the inner side of the diaphragm wall corresponding to the positions of rectangular holes. 2. Centering on each reinforcing column, a rectangular range with a width of 1 to 3 times the width of the reinforcing column and including the heights of two reinforcing beams is chiseled as the first chiseling area. 3. Reinforcing column supplementary sections are arranged along each reinforcing column within the corresponding first chiseling area. 4. The diaphragm wall between every two adjacent first chiseling areas is chiseled, and connecting section side walls are arranged. 5. Reinforcing bar for the reinforcing beam supplementary section is arranged at the position corresponding to each reinforcing beam between each reinforcing column supplementary section and the adjacent connecting section side wall. 6. The reinforcing beam supplementary section is poured. 7. The inlet water box culvert is constructed, the inlet water box culvert is connected to the rectangular hole, and all connecting section side walls are chiseled. The invention can further improve the construction efficiency on the premise of ensuring construction safety and convenience.

Description

Technical Field

[0001] The present invention relates to the technical field of the construction of sewage pumping stations, and particularly relates to a method for connecting and opening holes between a side diaphragm wall of a sewage pumping station and an inlet box culvert. Background Art

[0002] With the increasing demand for urban sewage treatment, the scale of municipal sewage treatment projects has gradually expanded, resulting in a large number of underground structures.

[0003] Due to its large overall stiffness, the diaphragm wall support system can well control the deformation of the foundation pit and can also be used as a permanent structure. Therefore, it has great applicability to foundation pit projects with large excavation depths, large planar dimensions and strict displacement requirements.

[0004] In practical applications, the sewage pumping station is the core of the municipal sewage treatment project. Due to restrictions such as urban land area, underground pipe network layout, and existing surrounding buildings, the sewage pumping station often needs to be arranged in combination with the inlet box culvert to transport sewage from different incoming flow directions.

[0005] Currently, the foundation pit construction of sewage pumping stations and inlet box culverts mostly adopts the method of staged construction. During the construction of the connection section between the inlet box culvert and the sewage pumping station, it is necessary to chisel and open holes in the completed diaphragm wall.

[0006] However, due to the large number of holes in the inlet box culvert and the large number of holes that need to be chiseled and opened, and the length of a single diaphragm wall segment being 6m to 8m, the hole opening spans multiple diaphragm wall segments, resulting in the suspension of the diaphragm wall and a risk of falling.

[0007] Therefore, how to improve the construction efficiency of chiseling and opening holes in the diaphragm wall on the premise of ensuring construction safety and convenience has become a technical problem that needs to be solved urgently by those skilled in the art. Summary of the Invention

[0008] In view of the above-mentioned defects of the prior art, the present invention provides a method for connecting and opening holes between a side diaphragm wall of a sewage pumping station and an inlet box culvert, and the achieved purpose is to improve the construction efficiency of chiseling and opening holes in the diaphragm wall on the premise of ensuring construction safety and convenience.

[0009] To achieve the above purpose, the present invention discloses a method for connecting and opening holes between a side diaphragm wall of a sewage pumping station and an inlet box culvert. The diaphragm wall connecting the sewage pumping station and the inlet box culvert includes multiple groove joint seams in the horizontal direction; the rectangular hole connecting the diaphragm wall and the inlet box culvert covers at least one of the groove joint seams in the horizontal direction, and the method includes the following steps:

[0010] Step 1: Complete the earth excavation of the sewage lift pump station and the construction of the diaphragm wall. On the inner side of the diaphragm wall, at the upper and lower edge positions corresponding to the rectangular hole, set reinforcement beams, and set more than two reinforcement columns between the two reinforcement beams.

[0011] Step 2: On the diaphragm wall, with each reinforcement column as the center, chisel out a rectangular range of 1 to 3 times the width of the reinforcement column and including the heights of the two reinforcement beams as the first chiseling area.

[0012] Step 3: Set a supplementary section of the reinforcement column along each reinforcement column within the corresponding first chiseling area.

[0013] Both the upper and lower ends of each supplementary section of the reinforcement column are integrally fixed with the corresponding reinforcement beam.

[0014] Step 4: Chisel out the diaphragm wall between every two adjacent first chiseling areas as the second chiseling area of the connection section, and set a side wall of the connection section at the corresponding position after completing the chiseling of each second chiseling area.

[0015] Both the upper and lower ends of each side wall of the connection section are integrally fixed with the corresponding reinforcement beam.

[0016] Step 5: Between each supplementary section of the reinforcement column and the adjacent side wall of the connection section, set the steel bars of the supplementary section of the reinforcement beam at the position corresponding to each reinforcement beam, and fix all the steel bars of the supplementary section of the reinforcement beam corresponding to each reinforcement beam with all the corresponding supplementary sections of the reinforcement column and all the corresponding side walls of the connection section into a whole.

[0017] Step 6: Pour the supplementary section of the reinforcement beam at the position corresponding to each reinforcement beam within the rectangular hole.

[0018] Step 7: Construct the inlet box culvert, connect the inlet box culvert with the rectangular hole, and chisel out all the side walls of the connection section.

[0019] Preferably, every two adjacent reinforcement columns are arranged on both sides of a groove joint, and the spacing between them is the same as the spacing between two adjacent groove joints.

[0020] Preferably, for each supplementary section of the reinforcement column and the parts of the upper and lower ends of each side wall of the connection section within the elevation range of the two reinforcement beams, the internal steel bars are connected with the steel bars of the two reinforcement beams into a whole through steel bar couplers.

[0021] Preferably, the inlet box culvert and the diaphragm wall are poured densely with C35 fine aggregate concrete, and a ring of water swelling rubber water stop strips is arranged on both the inner and outer sides.

[0022] Preferably, the steel bars in the top and bottom plates of the intake box culvert are fixed to the steel bars of the additional section of the reinforcement beam through steel bar couplers.

[0023] Preferably, a foundation pit retaining top ring beam is provided at the upper end of the diaphragm wall.

[0024] Advantages of the present invention:

[0025] The application of the present invention can improve the construction efficiency of cutting and opening holes in the diaphragm wall on the premise of ensuring construction safety and convenience.

[0026] The following will further illustrate the concept, specific structure and technical effects of the present invention in conjunction with the drawings, so as to fully understand the purpose, features and effects of the present invention. Description of the Drawings

[0027] Figure 1 Schematic diagram showing the state of completing the first cutting area in an embodiment of the present invention.

[0028] Figure 2 Schematic diagram showing the state of completing the setting of side walls of all connecting sections in an embodiment of the present invention.

[0029] Figure 3 Schematic elevation view of the rectangular hole after completing all the construction in an embodiment of the present invention.

[0030] Figure 4 Schematic plan view of the rectangular hole after completing all the construction in an embodiment of the present invention.

[0031] Figure 5 Schematic cross-sectional view of the rectangular hole after completing all the construction in an embodiment of the present invention.

[0032] Figure 6 Schematic layout diagram of the steel bar coupler in an embodiment of the present invention. Detailed Description of the Invention

[0033] Embodiment

[0034] As Figures 1 to 5 shown, a method for connecting and opening a hole in the diaphragm wall on the side of a sewage lift pump station and an intake box culvert. The diaphragm wall 2 connecting the sewage lift pump station and the intake box culvert includes a plurality of groove joint seams 3 in the horizontal direction; the rectangular hole connecting the diaphragm wall 2 and the intake box culvert covers at least one groove joint seam 3 in the horizontal direction, and the method includes the following steps:

[0035] Step 1: Complete the earth excavation of the sewage lift pump station and the construction of the diaphragm wall 2. On the inner side of the diaphragm wall 2, at the upper and lower edge positions corresponding to the rectangular holes, set the reinforcement beams 5, and set more than two reinforcement columns 4 between the two reinforcement beams 5;

[0036] Step 2: On the diaphragm wall 2, with each reinforcement column 4 as the center, chisel out a rectangular range of 1 to 3 times the width of the reinforcement column 4 and including the height of the two reinforcement beams 5 as the first chiseling area 6;

[0037] Step 3: Set the reinforcement column additional sections along each reinforcement column 4 within the corresponding first chiseling area 6;

[0038] Both the upper and lower ends of each reinforcement column additional section are fixed integrally with the corresponding reinforcement beam 5;

[0039] Step 4: Chisel out the diaphragm wall 2 between every two adjacent first chiseling areas 6 as the second chiseling area 7 of the connection section, and set the connection section side wall 8 at the corresponding position after completing the chiseling of each second chiseling area 7;

[0040] Both the upper and lower ends of each connection section side wall 8 are fixed integrally with the corresponding reinforcement beam 5;

[0041] Step 5: Between each reinforcement column additional section and the adjacent connection section side wall 8, set the steel bars of the reinforcement beam additional section at the position corresponding to each reinforcement beam 5, and fix all the steel bars of the reinforcement beam additional section corresponding to each reinforcement beam 5 integrally with the corresponding all reinforcement column additional sections and the corresponding all connection section side walls 8;

[0042] Step 6: Pour the reinforcement beam additional section at the position corresponding to each reinforcement beam 5 within the rectangular hole;

[0043] Step 7: Construct the inlet box culvert, connect the inlet box culvert with the rectangular hole, and chisel out all the connection section side walls 8.

[0044] In the present invention, first, set multiple first chiseling areas 6 at the positions between every two groove section joints 3 of the diaphragm wall 2. After chiseling and opening holes and setting the reinforcement column additional sections in each first chiseling area 6, then construct the second chiseling area 7. When constructing the second chiseling area 7, after chiseling each second chiseling area 7 one by one, set the connection section side wall 8 at the corresponding position. Finally, fix all the steel bars of the reinforcement beam additional section corresponding to each reinforcement beam 5 integrally with the corresponding all reinforcement column additional sections and the corresponding all connection section side walls 8, and use the reinforcement beam additional section to support the diaphragm wall 2.

[0045] The present invention can overcome the problem that the rectangular holes straddle the groove joint 3 of the diaphragm wall 2, resulting in the suspension of the top ring beam 1 of the overall foundation pit retaining structure and the diaphragm wall 2, and the diaphragm wall 2 falling. Compared with the prior art, it not only has better construction efficiency but also is safer.

[0046] In some embodiments, every two adjacent reinforcement columns 4 are arranged on both sides of a groove joint 3, and the spacing between them is the same as the spacing between two adjacent groove joints 3.

[0047] Such as Figure 5 and Figure 6 As shown, in some embodiments, each reinforcement column supplementary section, and the upper and lower ends of each side wall 8 of the connection section located within the elevation range of the two reinforcement beams 5 are connected into a whole by a steel bar coupler 9 with the steel bars of the two reinforcement beams 5.

[0048] In some embodiments, the water inlet culvert and the diaphragm wall 2 are poured densely with C35 fine aggregate concrete, and a ring of water-swellable rubber waterstop strips is provided on both the inner and outer sides.

[0049] In some embodiments, the steel bars in the top plate and bottom plate of the water inlet culvert are fixed to the steel bars of the reinforcement beam supplementary section through the steel bar coupler 9.

[0050] In some embodiments, the upper end of the diaphragm wall 2 is provided with a top ring beam 1 of the foundation pit retaining structure.

[0051] The preferred specific embodiments of the present invention have been described in detail above. It should be understood that those of ordinary skill in the art can make many modifications and variations based on the concept of the present invention without creative labor. Therefore, all technical solutions that can be obtained by those skilled in the art in the technical field of the present invention through logical analysis, reasoning or limited experiments based on the concept of the present invention on the basis of the prior art shall fall within the protection scope determined by the claims.

Claims

1. Method for opening a hole in the connection between the side diaphragm wall of a sewage lift pumping station and an inlet water box culvert. The diaphragm wall (2) connecting the sewage lift pumping station and the inlet water box culvert includes multiple groove section joints (3) in the horizontal direction; the rectangular hole connecting the diaphragm wall (2) and the inlet water box culvert covers at least one of the groove section joints (3) in the horizontal direction; it is characterized in that, It includes the following steps: Step 1: Complete the earth excavation of the sewage lift pumping station and the construction of the diaphragm wall (2). On the inner side of the diaphragm wall (2), at the upper and lower edge positions corresponding to the rectangular hole, set reinforcement beams (5), and set more than two reinforcement columns (4) between the two reinforcement beams (5); Step 2: On the diaphragm wall (2), with each reinforcement column (4) as the center, chisel out a rectangular range with a width of 1 to 3 times the width of the reinforcement column (4) and including the height of the two reinforcement beams (5) as the first chiseling area (6); Step 3: Set a reinforcement column additional section along each reinforcement column (4) within the corresponding first chiseling area (6); The upper and lower ends of each reinforcement column additional section are fixed integrally with the corresponding reinforcement beam (5); Step 4: Chisel out the diaphragm wall (2) between every two adjacent first chiseling areas (6) as the second chiseling area (7) of the connection section, and set a connection section side wall (8) at the corresponding position after completing the chiseling of each second chiseling area (7); The upper and lower ends of each connection section side wall (8) are fixed integrally with the corresponding reinforcement beam (5); Step 5: Between each reinforcement column additional section and the adjacent connection section side wall (8), set the steel bars of the reinforcement beam additional section corresponding to each reinforcement beam (5), and fix all the steel bars of the reinforcement beam additional section corresponding to each reinforcement beam (5) integrally with the corresponding all reinforcement column additional sections and the corresponding all connection section side walls (8); Step 6: Pour the reinforcement beam additional section at the position corresponding to each reinforcement beam (5) within the rectangular hole; Step 7: Construct the inlet box culvert, connect the inlet box culvert with the rectangular hole, and chisel out all the connection section side walls (8).

2. The connection and hole-opening method of the side diaphragm wall of the sewage lift pumping station and the inlet box culvert according to claim 1, characterized in that, Each two adjacent reinforcement columns (4) are arranged on both sides of a groove joint (3), and the distance between them is the same as the distance between two adjacent groove joints (3).

3. The connection and hole-opening method for the side diaphragm wall of the sewage lift pumping station and the inlet box culvert according to claim 1, characterized in that, For each reinforcement column additional section and the part of the upper and lower ends of each connection section side wall (8) within the elevation range of the two reinforcement beams (5), the internal steel bars are connected integrally with the steel bars of the two reinforcement beams (5) through a steel bar coupler (9).

4. The method for connecting and opening holes between the side diaphragm wall of a sewage lift pumping station and an inlet box culvert according to claim 1, characterized in that The inlet box culvert and the diaphragm wall (2) are poured densely with C35 fine aggregate concrete, and a water swelling rubber water stop strip is arranged on both the inner and outer sides.

5. The method for connecting and opening holes between the side diaphragm wall of a sewage lift pumping station and the inlet box culvert according to claim 1, characterized in that The steel bars in the top plate and bottom plate of the inlet box culvert are fixed with the steel bars of the reinforcement beam additional section through a steel bar coupler (9).

6. The connection and hole-opening method of the side diaphragm wall of the sewage lift pumping station and the intake box culvert according to claim 1, characterized in that The upper end of the diaphragm wall (2) is provided with a foundation pit retaining top ring beam (1).

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