Supporting and retaining structure for foundation pit to penetrate through current pipeline

Abstract

The utility model relates to a supporting and retaining structure at the position where a foundation pit penetrates through a current pipeline, which is applied to the junction of a foundation pit support and the current pipeline and comprises support steel sheet piles, soil retaining steel sheet piles and channel steel transverse soil retaining plates, and channel steel vertical soil retaining plates are arranged between the two sides of the current pipeline and the corresponding support steel sheet piles respectively. The upper ends and the lower ends of the vertical channel steel breast boards are fixedly connected with the transverse channel steel breast boards located above and below the current pipeline correspondingly, the lower ends of the soil retaining steel sheet piles are fixedly connected with the transverse channel steel breast boards located above the current pipeline, and the soil retaining steel sheet piles are located between the supporting steel sheet piles on the two sides. The upper portions of the supporting steel sheet piles and the soil retaining steel sheet piles are connected into a whole through steel waist beams, and steel supports are connected between the steel waist beams between the inner side and the outer side of the foundation pit. Safety and stability of a supporting structure at a current pipeline are guaranteed, the problem that a foundation pit supporting pile at the current pipeline cannot be closed is effectively solved, stability of a soil body on the side wall of a foundation pit and safe operation of the pipeline are guaranteed, and the structural form is simple.

Description

Technical Field

[0001] This utility model relates to the field of foundation pit support technology, and in particular to a support structure for foundation pits crossing existing pipelines. Background Technology

[0002] With the increasing demand for urban underground space development, the excavation of foundation pits often requires crossing complex existing pipeline systems, including water supply, drainage, gas, electricity, and communication facilities. If the foundation pit is excavated only after the pipelines have been relocated, the construction period is long, and some pipelines are difficult to relocate due to the surrounding environment and pipeline functions. Therefore, existing pipelines are often protected by suspension systems when crossing the foundation pit. However, the foundation pit support piles cannot form a closed structure at the pipeline location. Traditionally, pre-reinforcement of the soil above and below the pipeline is often used, but this easily disturbs the existing pipelines during actual implementation. Furthermore, the procedures and processes are complex, costly, time-consuming, and have poor quality reliability. Summary of the Invention

[0003] The technical problem to be solved by this utility model is to provide a support structure for the location where a foundation pit crosses an existing pipeline, addressing the shortcomings of the prior art.

[0004] The technical solution of this utility model to solve the above-mentioned technical problems is as follows: A retaining structure for a foundation pit crossing an existing pipeline, applied at the junction of the foundation pit support and the existing pipeline, includes support sheet piles set on both sides of the existing pipeline, retaining sheet piles set above the existing pipeline, and channel steel transverse retaining plates set above and below the existing pipeline. Channel steel vertical retaining plates are set between the existing pipeline and the corresponding support sheet piles on both sides, and the upper and lower ends of the channel steel vertical retaining plates are respectively connected and fixed to the channel steel transverse retaining plates located above and below the existing pipeline. The lower end of the retaining sheet piles is connected and fixed to the channel steel transverse retaining plates located above the existing pipeline. The retaining sheet piles are located between the support sheet piles on both sides. The upper parts of the support sheet piles and the retaining sheet piles are connected as a whole by steel waist beams. Steel supports are connected between the steel waist beams between the inner and outer sides of the foundation pit.

[0005] The beneficial effects of this utility model are as follows: The retaining structure at the location where the foundation pit crosses the existing pipeline is constructed by setting support sheet piles on both sides of the existing pipeline, retaining sheet piles above the existing pipeline, and channel steel transverse retaining plates above and below the existing pipeline. Channel steel vertical retaining plates are also installed between the existing pipeline and the corresponding support sheet piles on both sides. This combination ensures the safety and stability of the support structure at the existing pipeline location, effectively solves the problem of the foundation pit support piles being unable to close at the existing pipeline location, ensures the stability of the soil on the foundation pit sidewalls and the safe operation of the pipeline, improves the construction efficiency of the foundation pit crossing the pipeline, and features a simple structure, strong operability, high safety, and low cost.

[0006] Based on the above technical solution, the present invention can be further improved as follows:

[0007] Further: The supporting steel sheet piles are composed of multiple interlocking U-shaped steel sheet piles, and the horizontal clearance between the supporting steel sheet piles and the existing pipeline is 20-40cm.

[0008] The beneficial effects of the above-mentioned further solution are: the support sheet piles are formed by the interlocking of multiple U-shaped steel sheet piles, which can bear the water and soil pressure outside the foundation pit, and the safety of the existing pipelines can be guaranteed by controlling the horizontal clearance between the support sheet piles and the existing pipelines.

[0009] Further: The retaining steel sheet pile is composed of multiple interlocking U-shaped steel sheet piles, and the net distance between the lower end of the retaining steel sheet pile and the existing pipeline is 5-15cm.

[0010] The beneficial effects of the above-mentioned further solution are: by interlocking multiple U-shaped steel sheet piles to form the retaining steel sheet pile, the soil and water pressure above the existing pipeline can be borne, and by controlling the net distance between the lower end of the retaining steel sheet pile and the existing pipeline, the safety of the existing pipeline can be guaranteed.

[0011] Furthermore, the supporting sheet piles are interlocked with each other, with the supporting sheet piles and the retaining sheet piles, and with the retaining sheet piles themselves.

[0012] The beneficial effect of the above-mentioned further solution is that by interlocking the support sheet piles, the support sheet piles and the retaining sheet piles, and the retaining sheet piles, the water and soil pressure above the existing pipeline can be transmitted to the support sheet piles to ensure the safety and stability of the existing pipeline and the water and soil above it.

[0013] Further: The transverse retaining wall of the channel steel located above the existing pipeline is composed of a single channel steel, and the transverse retaining wall of the channel steel located below the existing pipeline is composed of multiple channel steels arranged closely together. The net distance between the transverse retaining wall of the channel steel and the existing pipeline is 5-15cm.

[0014] The beneficial effects of the above-mentioned further solution are: the horizontal retaining plate of the channel steel above the existing pipeline, which is formed by a single channel steel, can bear the water and soil pressure above the existing pipeline, and the horizontal retaining plate of the channel steel below the existing pipeline, which is formed by multiple channel steels closely arranged, can better bear the water and soil pressure transmitted by the supporting steel sheet piles and the vertical retaining plate of the channel steel, thus ensuring the safety of the existing pipeline.

[0015] Further: the transverse retaining plate of the channel steel is welded to the supporting steel sheet pile, and the vertical retaining plate of the channel steel is welded to the transverse retaining plate of the channel steel.

[0016] The beneficial effects of the above-mentioned further solution are: by welding the transverse retaining plate of the channel steel to the supporting steel sheet pile, and welding the vertical retaining plate of the channel steel to the transverse retaining plate of the channel steel, the transverse retaining plate of the channel steel and the vertical retaining plate of the channel steel can transfer the water and soil pressure below the existing pipeline to the supporting steel sheet pile, so as to ensure the safety and stability of the existing pipeline and the water and soil below.

[0017] Furthermore: the steel waist beam is composed of a single H-beam or a double H-beam, and the steel support is a circular steel pipe.

[0018] The beneficial effect of the above-mentioned further solution is that by adding an internal support above the supporting steel sheet pile through the steel waist beam and steel support, the deformation of the pile and soil can be effectively reduced.

[0019] Furthermore, the supporting sheet piles, retaining sheet piles, and channel steel vertical retaining plates are all symmetrically arranged on both sides of the existing pipeline.

[0020] The beneficial effect of the above-mentioned further solution is that by symmetrically arranging the support sheet piles, retaining sheet piles and channel steel vertical retaining plates on both sides of the existing pipeline, the entire foundation pit support structure can be subjected to more uniform stress, thereby ensuring the safety of the existing pipeline. Attached Figure Description

[0021] Figure 1 This is a schematic elevation view of the retaining structure at the location where the foundation pit crosses an existing pipeline, according to an embodiment of the present invention.

[0022] Figure 2 for Figure 1 Schematic diagram of the AA planar structure;

[0023] Figure 3 for Figure 1 Schematic diagram of the BB planar structure.

[0024] The attached diagram lists the components represented by each number as follows:

[0025] 1. Existing pipelines, 2. Support sheet piles, 3. Retaining sheet piles, 4. Horizontal retaining wall of channel steel, 5. Vertical retaining wall of channel steel, 6. Steel waist beam, 7. Steel support. Detailed Implementation

[0026] The principles and features of the present invention are described below in conjunction with the accompanying drawings. The examples given are only used to explain the present invention and are not used to limit the scope of the present invention.

[0027] like Figures 1 to 3 As shown, a retaining structure for a foundation pit crossing an existing pipeline is applied at the junction of the foundation pit support and the existing pipeline 1. It includes support sheet piles 2 on both sides of the existing pipeline 1, retaining sheet piles 3 above the existing pipeline 1, and transverse retaining plates 4 above and below the existing pipeline 1. Vertical retaining plates 5 are installed between the existing pipeline 1 and the corresponding support sheet piles 2 on both sides. The upper and lower ends of the vertical retaining plates 5 are connected and fixed to the transverse retaining plates 4 above and below the existing pipeline 1, respectively. The lower end of the retaining sheet piles 3 is connected and fixed to the transverse retaining plates 4 above the existing pipeline 1. The retaining sheet piles 3 are located between the support sheet piles 2 on both sides. The upper parts of the support sheet piles 2 and the retaining sheet piles 3 are connected as a whole by steel waist beams 6. Steel supports 7 are connected between the steel waist beams 6 on the inner and outer sides of the foundation pit.

[0028] This utility model discloses a retaining structure for foundation pits crossing existing pipelines. It includes supporting sheet piles 2 on both sides of the existing pipeline 1, retaining sheet piles 3 above the existing pipeline 1, and transverse retaining plates 4 made of channel steel above and below the existing pipeline 1. Vertical retaining plates 5 of channel steel are installed between the existing pipeline 1 and the corresponding supporting sheet piles 2 on both sides. This combination ensures the safety and stability of the support structure at the existing pipeline 1, effectively solving the problem of the foundation pit support piles being unable to close at the existing pipeline 1. It ensures the stability of the soil on the sidewalls of the foundation pit and the safe operation of the pipeline, improving the construction efficiency of the foundation pit crossing the pipeline. The structure is simple, highly operable, safe, and inexpensive.

[0029] In one or more embodiments of this utility model, the supporting sheet pile 2 is composed of multiple interlocking U-shaped sheet piles, and the horizontal clearance between the supporting sheet pile 2 and the existing pipeline 1 is 20-40cm. The supporting sheet pile 2, formed by multiple interlocking U-shaped sheet piles, can withstand the water and soil pressure outside the foundation pit, and by controlling the horizontal clearance between the supporting sheet pile 2 and the existing pipeline 1, the safety of the existing pipeline 1 can be ensured.

[0030] Preferably, to ensure the safety of the existing pipeline 1, a safety distance of 30cm is reserved between the supporting steel sheet piles 2 and the existing pipeline 1. In addition, the length and type of the multiple U-shaped steel sheet piles should meet the safety and stability requirements of the foundation pit.

[0031] In one or more embodiments of this utility model, the retaining steel sheet pile 3 is composed of multiple interlocking U-shaped steel sheet piles, and the net distance between the lower end of the retaining steel sheet pile 3 and the existing pipeline 1 is 5-15cm. By using multiple interlocking U-shaped steel sheet piles to form the retaining steel sheet pile 3, it can withstand the water and soil pressure above the existing pipeline 1, and by controlling the net distance between the lower end of the retaining steel sheet pile 3 and the existing pipeline 1, the safety of the existing pipeline 1 can be ensured.

[0032] In practice, the model and top elevation of the retaining steel sheet pile 3 are the same as those of the supporting steel sheet pile 2, and a safety distance of 10cm is reserved between it and the existing pipeline 1.

[0033] Optionally, in one or more embodiments of this utility model, the supporting sheet piles 2 are respectively interlocked with each other, with the supporting sheet piles 2 and the retaining sheet piles 3, and with the retaining sheet piles 3. By interlocking the supporting sheet piles 2, with the supporting sheet piles 2 and the retaining sheet piles 3, and with the retaining sheet piles 3, the water and soil pressure above the existing pipeline 1 can be transferred to the supporting sheet piles 2, thereby ensuring the safety and stability of the existing pipeline 1 and the water and soil above it.

[0034] In one or more embodiments of this utility model, the transverse retaining plate 4 of channel steel above the existing pipeline 1 is composed of a single channel steel, and the transverse retaining plate 4 of channel steel below the existing pipeline 1 is composed of multiple channel steels arranged closely together. The net distance between the transverse retaining plate 4 of channel steel and the existing pipeline 1 is 5-15cm. The transverse retaining plate 4 of channel steel above the existing pipeline 1, composed of a single channel steel, can bear the water and soil pressure above the existing pipeline 1, and the transverse retaining plate 4 of channel steel below the existing pipeline 1, composed of multiple channel steels arranged closely together, can better bear the water and soil pressure transmitted by the supporting sheet piles 2 and the vertical retaining plate 5 of channel steel, ensuring the safety of the existing pipeline 1.

[0035] Preferably, the net distance between the transverse retaining plate 4 of the channel steel and the existing pipeline 1 is 10cm.

[0036] Optionally, in one or more embodiments of this utility model, the transverse retaining plate 4 of the channel steel is welded to the supporting sheet pile 2, and the vertical retaining plate 5 of the channel steel is welded to the transverse retaining plate 4. By welding the transverse retaining plate 4 to the supporting sheet pile 2 and the vertical retaining plate 5 to the transverse retaining plate 4, the transverse retaining plate 4 and the vertical retaining plate 5 can transfer the water and soil pressure below the existing pipeline 1 to the supporting sheet pile 2, thereby ensuring the safety and stability of the existing pipeline 1 and the water and soil below it.

[0037] In one or more embodiments of this utility model, the steel waist beam 6 is composed of a single H-beam or a double H-beam, and the steel support 7 is a circular steel pipe. By adding an internal support above the supporting sheet pile 2 through the steel waist beam 6 and the steel support 7, the deformation of the pile and the soil can be effectively reduced.

[0038] Optionally, in one or more embodiments of this utility model, the supporting sheet piles 2, the retaining sheet piles 3, and the channel steel vertical retaining plates 5 are all symmetrically arranged on both sides of the existing pipeline 1. By symmetrically arranging the supporting sheet piles 2, the retaining sheet piles 3, and the channel steel vertical retaining plates 5 on both sides of the existing pipeline 1, the stress on the entire foundation pit support structure can be made more uniform, thereby ensuring the safety of the existing pipeline 1.

[0039] This utility model presents a retaining structure for foundation pits crossing existing pipelines. The structure is simple, highly operable, safe, and inexpensive. Through the combination of supporting sheet piles 2, retaining sheet piles 3, transverse channel steel retaining plates 4, and vertical channel steel retaining plates 5, the safety and stability of the support structure at the existing pipeline 1 are ensured. This effectively solves the problem of the foundation pit support piles being unable to be sealed at the existing pipeline 1, ensuring the stability of the foundation pit sidewall soil and the safe operation of the pipeline, and improving the construction efficiency of foundation pits crossing pipelines.

[0040] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. A retaining structure at the junction of a foundation pit and an existing pipeline (1), characterized in that: The system includes supporting sheet piles (2) installed on both sides of the existing pipeline (1), retaining sheet piles (3) installed above the existing pipeline (1), and channel steel transverse retaining plates (4) installed above and below the existing pipeline (1). Channel steel vertical retaining plates (5) are installed between the existing pipeline (1) and the corresponding supporting sheet piles (2) on both sides, and the upper and lower ends of the channel steel vertical retaining plates (5) are respectively connected to the existing pipeline (1) above. The lower end of the retaining steel sheet pile (3) is connected and fixed to the transverse retaining steel sheet pile (4) above the existing pipeline (1). The retaining steel sheet pile (3) is located between the supporting steel sheet piles (2) on both sides. The upper parts of the supporting steel sheet pile (2) and the retaining steel sheet pile (3) are connected as a whole by steel waist beams (6). Steel supports (7) are connected between the steel waist beams (6) on both sides of the pit.

2. The retaining structure at the location where the foundation pit crosses an existing pipeline as described in claim 1, characterized in that: The supporting steel sheet pile (2) is composed of multiple interlocking U-shaped steel sheet piles, and the horizontal net distance between the supporting steel sheet pile (2) and the existing pipeline (1) is 20-40cm.

3. The retaining structure at the location where the foundation pit crosses an existing pipeline as described in claim 2, characterized in that: The retaining steel sheet pile (3) is composed of multiple interlocking U-shaped steel sheet piles, and the net distance between the lower end of the retaining steel sheet pile (3) and the existing pipeline (1) is 5-15cm.

4. The retaining structure at the location where the foundation pit crosses an existing pipeline as described in claim 3, characterized in that: The supporting sheet piles (2) are interlocked with each other, the supporting sheet piles (2) are interlocked with the retaining sheet piles (3), and the retaining sheet piles (3) are interlocked with each other.

5. The retaining structure at the location where the foundation pit crosses an existing pipeline as described in claim 1, characterized in that: The transverse retaining plate (4) of the channel steel located above the existing pipeline (1) is composed of a single channel steel, and the transverse retaining plate (4) of the channel steel located below the existing pipeline (1) is composed of multiple channel steels arranged closely together. The net distance between the transverse retaining plate (4) of the channel steel and the existing pipeline (1) is 5-15cm.

6. The retaining structure at the location where the foundation pit crosses an existing pipeline as described in claim 1, characterized in that: The transverse retaining plate (4) of the channel steel is welded to the supporting steel sheet pile (2), and the vertical retaining plate (5) of the channel steel is welded to the transverse retaining plate (4) of the channel steel.

7. The retaining structure at the location where the foundation pit crosses an existing pipeline according to any one of claims 1-6, characterized in that: The steel waist beam (6) is made of a single H-beam or a double I-beam, and the steel support (7) is a circular steel pipe.

8. The retaining structure at the location where the foundation pit crosses an existing pipeline according to any one of claims 1-6, characterized in that: The supporting sheet piles (2), retaining sheet piles (3), and channel steel vertical retaining plates (5) are symmetrically arranged on both sides of the existing pipeline (1).

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