Triangular temporary backrest structure in basement under construction

Abstract

The utility model relates to a triangular temporary backrest structure in a basement under construction, which is positioned on a bottom plate constructed underground and comprises a bracket, a vertical support, a transverse support and an inclined support, the vertical support and the transverse support are located on the same plane and are perpendicular to a line of a jacking pipe in the jacking pipe starting equipment. A gap is formed between the transverse support and the bottom plate; the inclined strut is provided with a first end and a second end, and the first end of the inclined strut is arranged at the intersection of the vertical support and the transverse support; the second end of the inclined strut is arranged on the bottom plate through the bracket; and the vertical support stands on the bottom plate. The pipe jacking device can meet the pipe jacking construction process requirement, the requirement for a construction site is small, and resource cost is saved.

Description

Technical Field

[0001] This utility model relates to the field of pipe jacking starting and backing structure, and in particular to a triangular temporary backing structure in a basement under construction. Background Technology

[0002] In recent years, with the acceleration of urbanization, pipe jacking has been gradually applied to the construction of underground projects such as pedestrian underpasses, subway entrances and exits, underground utility tunnels, vehicular tunnels, subway stations, and underground commercial streets. Pipe jacking technology not only reduces the impact on surface traffic and the environment but also effectively improves the utilization rate of urban underground space. Currently, the application of this technology in the development of shallow underground space in Chinese cities is receiving increasing attention and importance.

[0003] Typically, pipe jacking construction requires the construction of a working shaft underground as the starting base for the pipe jacking, with the reinforced soil behind the working shaft providing support for the jacking force. However, this approach usually has the following two problems: 1. When the construction site is limited and conditions do not allow for the construction of a starting shaft, such as in densely populated urban areas with limited space. 2. Even when conditions allow for the construction of an independent starting working shaft, the specially constructed starting working shaft needs to be excavated after the pipe jacking tunnel is completed and before the construction of the subsequent basement, resulting in a significant waste of resources and costs.

[0004] For the two situations mentioned above, the existing foundation pit or building (structure) or the reserved space of the basement under construction can be used as the starting area.

[0005] Currently, there are a few engineering examples that utilize existing foundation pits or reserved spaces in buildings or basements under construction as starting areas. However, the accompanying temporary backing structures are generally composed of thick reinforced concrete backing walls, stepped reinforced concrete backing walls, and reinforced concrete ribs distributed at intervals. This results in large-scale and costly pouring and demolition work, failing to meet the economic and rational requirements of underground engineering construction. Therefore, it is necessary to abandon the original approach and explore new types of temporary backing structures for starting.

[0006] Therefore, it is necessary to provide a triangular temporary support structure for the basement under construction, which meets the requirements of pipe jacking construction technology, has small requirements for construction site, and saves resource costs. Utility Model Content

[0007] The purpose of this utility model is to provide a triangular temporary support structure for a basement under construction, which meets the requirements of pipe jacking construction technology, requires less construction site space, and saves resource costs.

[0008] To address the problems existing in the prior art, this utility model provides a triangular temporary backing structure for a basement under construction. The triangular temporary backing structure is located on a basement slab of the underground structure and includes: corbels, vertical supports, horizontal supports, and diagonal braces.

[0009] The vertical support and the horizontal support are located on the same plane and are perpendicular to the jacking pipe line in the jacking pipe launching equipment; there is a gap between the horizontal support and the base plate;

[0010] The diagonal brace has a first end and a second end. The first end of the diagonal brace is located at the intersection of the vertical support and the horizontal support. The second end of the diagonal brace is mounted on the base plate via the bracket.

[0011] The vertical support stands on the base plate.

[0012] Optionally, in the triangular temporary support structure inside the basement under construction, two vertical supports are provided at both ends of the horizontal support.

[0013] Optionally, in the triangular temporary support structure in the basement under construction, the two ends of the horizontal support form two intersections with the two vertical supports, the first ends of the two diagonal braces are respectively set at the two intersections, and the second ends of the two diagonal braces are set on the base plate through the two corbels.

[0014] Optionally, in the triangular temporary support structure inside the basement under construction, a steel plate is provided between the triangular temporary support structure and the pipe jacking starting equipment.

[0015] Optionally, in the triangular temporary support structure inside the basement under construction, the steel plate is located between the jacks and vertical supports of the pipe jacking launching equipment.

[0016] Optionally, in the triangular temporary support structure inside the basement under construction, the steel plate stands on a lowered base plate, and the lowered base plate is lower than the base plate.

[0017] Optionally, in the triangular temporary support structure inside the basement under construction, the corbel, the lowered base plate, and the base plate are cast integrally, and the corbel and the base plate are all reserved with reinforcing bars or connectors.

[0018] Optionally, in the triangular temporary backing structure in the basement under construction, the triangular temporary backing structure is a removable structure.

[0019] Compared with the prior art, this utility model has the following advantages:

[0020] (1) This utility model can meet the requirements of pipe jacking construction process, has low requirements for construction site, and saves resource costs.

[0021] (2) The pouring and demolition work of this utility model is small, saving manpower and resource costs, and meets the economic and reasonable requirements of underground engineering construction. Attached Figure Description

[0022] Figure 1 A side view of the triangular temporary backrest structure provided in an embodiment of this utility model;

[0023] Figure 2 A top view of the triangular temporary backrest structure provided in an embodiment of this utility model.

[0024] Among them, 1-pipe jacking starting equipment; 2-steel plate; 3-horizontal support; 4-vertical support; 5-diagonal brace; 6-bracket; 7-lowering base plate; 8-base plate; 9-side wall; 10-top plate; 11-jack. Detailed Implementation

[0025] The specific embodiments of this utility model will now be described in more detail with reference to the accompanying drawings. The advantages and features of this utility model will become clearer from the following description. It should be noted that the drawings are all in a very simplified form and use non-precise proportions, and are only used to facilitate and clarify the illustration of the embodiments of this utility model.

[0026] In the description of this application, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this application.

[0027] Currently, there are a few engineering examples that utilize existing foundation pits or buildings (structures) or reserved spaces in basements under construction as starting areas. However, the supporting temporary backing structures are generally composed of a single thick reinforced concrete backing wall, a stepped reinforced concrete backing wall, and reinforced concrete ribs distributed at intervals. This results in a large amount of pouring and demolition work and high costs, which cannot meet the economic and reasonable needs of underground engineering construction.

[0028] To address the problems existing in the prior art, this utility model provides a temporary triangular support structure for use in a basement under construction, such as... Figure 1 and 2As shown, the triangular temporary backing structure is located on a base slab 8 constructed underground. The triangular temporary backing structure includes: corbel 6, vertical support 4, horizontal support 3, and diagonal brace 5.

[0029] The vertical support 4 and the horizontal support 3 are located on the same plane and are perpendicular to the jacking pipe line in the jacking pipe launching equipment 1; there is a gap between the horizontal support 3 and the base plate 8;

[0030] The diagonal brace 5 has a first end and a second end. The first end of the diagonal brace 5 is located at the intersection of the vertical support 4 and the horizontal support 3. The second end of the diagonal brace 5 is mounted on the base plate 8 via the bracket 6. Preferably, the two ends of the horizontal support 3 are provided with two vertical supports 4, and the two ends of the horizontal support 3 and the two vertical supports 4 form two intersections. The first ends of the two diagonal braces 5 are respectively located at the two intersections, and the second ends of the two diagonal braces 5 are mounted on the base plate 8 via the two brackets 6.

[0031] The vertical support 4 stands on the base plate 8 and is perpendicular to the base plate 8.

[0032] Optionally, in the triangular temporary support structure in the basement under construction, a steel plate 2 is provided between the triangular temporary support structure and the pipe jacking starting equipment 1, and the steel plate 2 is located between the jack 11 and the vertical support 4 of the pipe jacking starting equipment 1.

[0033] Typically, the steel plate 2 stands on the lowered base plate 7, which is lower than the base plate 8. The corbel 6, the lowered base plate 7, and the base plate 8 are cast integrally, and both the corbel 6 and the base plate 8 have pre-installed reinforcing bars or connectors. Preferably, as follows... Figure 1 As shown on the left, the lowered base plate 7 is lower than the base plate 8. Figure 1 As shown on the right side, the vertical support 4 and the corbel 6 are mounted on the base plate 8.

[0034] Preferably, the triangular temporary support structure is a removable structure, that is, after the jacking work is completed, the vertical support 4, the horizontal support 3, the diagonal brace 5 and the corbel 6 and other components can be removed as needed according to the subsequent use requirements of the construction project.

[0035] In this invention, the diagonal brace 5 connects the vertical support 4, the horizontal support 3, and the corbel 6, serving as an important support and force transmission structure. The corbel 6 is mounted on the base plate 8 and is cast together with the base plate 8, ensuring the overall stability of the load. The base plate 8 then transmits the jacking reaction force to the foundation soil. All of the above components are preferably constructed of reinforced concrete.

[0036] The method for constructing the temporary triangular backing structure includes the following steps:

[0037] S1: Based on the site conditions, pipe jacking process, and the size requirements of the triangular temporary support structure, determine the design positions of steel plate 2, vertical support 4, horizontal support 3, diagonal brace 5, and corbel 6.

[0038] S2: Calculate the cross-sectional specifications and reinforcement parameters of vertical support 4, horizontal support 3, diagonal brace 5 and corbel 6 based on the actual jacking reaction force requirements, site conditions and geological conditions.

[0039] S3: Construct a base plate 8, a top plate 10, and side walls 9. The base plate 8, top plate 10, and side walls 9 form the main body of the underground project, and reserve the space required for the starting area and corresponding hoisting holes. At the same time as pouring the base plate 8, pour the corbel 6 and the lowered base plate 7, so that the lowered base plate 7 is lower than the base plate 8. Reserve the inserts or connectors of the diagonal bracing 5 on the corbel 6, and reserve the inserts or connectors of the vertical support 4 on the base plate 8.

[0040] S4. Simultaneously pour or pour in stages according to the work plan, the vertical support 4, the horizontal support 3, and the diagonal brace 5, so that the vertical support 4 and the horizontal support 3 are located on the same plane and perpendicular to the jacking line in the jacking starting equipment 1; there is a gap between the horizontal support 3 and the base plate 8; the diagonal brace 5 has a first end and a second end, the first end of the diagonal brace 5 is set at the intersection of the vertical support 4 and the horizontal support 3; the second end of the diagonal brace 5 is set on the base plate 8 through the bracket 6, and the vertical support 4 stands on the base plate 8;

[0041] S5. After the temporary triangular support structure has reached the design strength, the starting support steel plate 2 is installed. The steel plate 2 must be in close contact with the vertical support 4, so that the steel plate 2 is located between the jack 11 of the pipe jacking starting equipment 1 and the vertical support 4, and stands on the lowering base plate 7. The jack 11 performs the jacking operation.

[0042] S6. After the jacking is completed, the vertical supports 4, horizontal supports 3, diagonal braces 5 and corbels 6 shall be removed as needed according to the subsequent use requirements of the construction project.

[0043] S7: Complete the subsequent main structure construction and equipment installation work according to the needs of the construction project in the usage stage.

[0044] Compared with the prior art, this utility model has the following advantages:

[0045] (1) This utility model can meet the requirements of pipe jacking construction process, has low requirements for construction site, and saves resource costs.

[0046] (2) The pouring and demolition work of this utility model is small, saving manpower and resource costs, and meets the economic and reasonable requirements of underground engineering construction.

[0047] The above are merely preferred embodiments of this utility model and do not constitute any limitation on this utility model. Any equivalent substitutions or modifications made by those skilled in the art to the technical solutions and contents disclosed in this utility model without departing from the scope of the technical solutions of this utility model shall still fall within the protection scope of this utility model.

Claims

1. A triangular temporary backstay structure in a building basement, characterized by, The triangular temporary backrest structure is located on a bottom plate built underground, and comprises a bracket, a vertical support, a horizontal support and an inclined support; The vertical support and the horizontal support are located in the same plane and are perpendicular to the line of the pipe in the pipe launching equipment; the horizontal support is spaced apart from the bottom plate; The inclined support has a first end and a second end, the first end of the inclined support is arranged at the intersection of the vertical support and the horizontal support, and the second end of the inclined support is arranged on the bottom plate through the bracket; The vertical support stands on the bottom plate.

2. The temporary rear support triangular structure in a basement under construction according to claim 1, characterized in that, Two vertical supports are arranged at the two ends of the horizontal support.

3. A temporary rear support structure for a triangular shaped basement under construction as claimed in claim 2, wherein, Two intersections are formed between the two ends of the horizontal support and the two vertical supports, the first ends of two inclined supports are arranged at the two intersections respectively, and the second ends of the two inclined supports are arranged on the bottom plate through the two brackets.

4. The temporary rear support triangular structure in a basement under construction according to claim 1, wherein, A steel plate is arranged between the triangular temporary backrest structure and the pipe launching equipment.

5. A temporary rear support structure for a triangular shaped basement under construction as claimed in claim 4, wherein, The steel plate is located between the jack of the pipe launching equipment and the vertical support.

6. A temporary rear support structure for a triangular shaped basement under construction as claimed in claim 4, wherein, The steel plate stands on a lowered bottom plate, and the lowered bottom plate is lower than the bottom plate.

7. A temporary rear support structure for a triangular shaped basement under construction as claimed in claim 6, wherein, The bracket, the lowered bottom plate and the bottom plate are integrally poured, and the bracket and the bottom plate are both reserved with a plug or a connector.

8. The temporary rear support triangular structure in a basement under construction according to claim 1, wherein, The triangular temporary backrest structure is a removable structure.

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