Construction structure of pipe gallery below intersection of underground pipe gallery
By setting up gaps at the intersection of underground pipeline corridors, demolishing existing structures, excavating foundation pits and supporting them, laying new pipeline corridors and restoring the bottom of the original pipeline corridor, the underground pipeline corridor and existing underground pipelines under construction have been solved. The construction difficulty and cost issues when the corridors cross the intersection achieve low-cost and high-efficiency construction results.
Patent Information
- Application Number
- CN202420556731.3
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-03-20
- Publication Date
- 2025-02-11
- Estimated Expiration
- 2034-03-20
AI Technical Summary
In the construction of urban pipeline corridors, when the underground pipeline corridor during construction intersects with the existing underground pipeline corridor, the existing foundation pit support plan is difficult to effectively support the foundation pit below, which affects the construction difficulty, cost and efficiency.
There are gaps at the intersection, the existing underground pipeline structure is removed, the foundation pit is excavated and the steel bars and earth nails are installed on both sides of the steel bars and steel mesh spray concrete layers are provided for support, new pipeline corridors are laid, and new pipeline corridors are used to use the new pipeline corridors. The top surface restores part of the bottom surface of the original pipe corridor.
It has achieved the effect of low construction difficulty, low cost and high efficiency, simplified the construction process, shortened the construction period, and saved construction costs.
Smart Images
Figure CN222456177U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the field of underground construction, in particular to a construction structure of a pipe gallery below an intersection of underground pipe galleries. Background Art
[0002] Underground pipe corridors are public tunnels built underground in cities for laying municipal pipelines such as electricity, communications, radio and television, water supply, drainage, heat, and gas. With the continuous development of urbanization and the development and utilization of underground space, the construction of underground comprehensive pipe corridors has entered a period of rapid development. However, in the construction of urban pipe corridors, it is inevitable that the underground pipe corridors under construction will intersect with the existing underground pipe corridors, which increases the difficulty of the construction of the underground pipe corridors under construction.
[0003] In this complex situation, common foundation pit support solutions often use steel sheet pile support, underground cast-in-place pile row and other support solutions after removing the upper structure and combining with geological conditions. However, if the foundation pit is excavated directly under the existing underground pipe gallery, the existing underground pipe gallery will affect the support of the foundation pit below and the construction of the pipe gallery. Considering the construction cost and feasibility, a construction plan that is conducive to construction is proposed in combination with the characteristics of the project. Utility Model Content
[0004] The purpose of the utility model is to overcome the shortcomings of the above-mentioned background technology and to provide a construction structure of the lower pipe gallery at the intersection of underground pipe galleries, so that it has the characteristics of low construction difficulty, low cost, high efficiency and good feasibility.
[0005] The utility model provides a construction structure of a pipeline gallery below an intersection of underground pipeline galleries, comprising an existing underground pipeline gallery, a notch is arranged on the existing underground pipeline gallery at the intersection with the underground pipeline gallery under construction, the notch is formed by dismantling the structure at the intersection corresponding to the existing underground pipeline gallery, a foundation pit is arranged below the intersection, the underground pipeline gallery under construction extending along its length direction is arranged in the foundation pit, the underground pipeline gallery under construction is located at the bottom of the existing underground pipeline gallery, a plurality of steel bars are arranged on the slope surfaces on both sides of the foundation pit along the slope direction thereof, the steel bars are inserted into the slope surfaces of the foundation pit along a certain angle, a first soil nail hanging steel mesh sprayed concrete layer is arranged on the slope surfaces on both sides of the foundation pit, and a backfill layer is arranged between both sides of the underground pipeline gallery under construction and the foundation pit.
[0006] In the above technical solution, the angle ɑ between the steel bar and the horizontal plane is 15°.
[0007] In the above technical solution, a slope protection with a certain slope β is provided on the top of the existing underground pipe gallery on both sides of the gap.
[0008] In the above technical solution, the slope of the slope protection is β=1:1.5.
[0009] In the above technical solution, the slope surface of the slope protection is provided with a second soil nail hanging steel mesh sprayed concrete layer.
[0010] In the above technical solution, a newly built underground pipeline gallery connected to the existing underground pipeline galleries at both ends is provided at the gap, and the bottom of the newly built underground pipeline gallery is connected to the top of the underground pipeline gallery under construction.
[0011] In the above technical solution, the backfill layer is a C20 concrete layer.
[0012] In the above technical solution, three rows of steel bars are arranged on the slope surface on each side of the foundation pit from high to low.
[0013] In the above technical solution, the foundations on the existing underground pipe gallery and on both sides of the underground pipe gallery under construction are respectively a plain fill layer, a clay layer, a gravel layer and a clay rock layer from top to bottom.
[0014] The construction structure of the underground pipe gallery below the intersection of the utility model has the following beneficial effects:
[0015] In the utility model, a foundation pit is excavated below the existing pipe gallery, graded slopes are made, soil nail walls are used for support, and a new pipe gallery is laid. The top surface of the new pipe gallery is used as part of the bottom surface of the original pipe gallery for restoration construction. The construction is simple, the construction period is short, the cost is saved, and the construction efficiency is high. BRIEF DESCRIPTION OF THE DRAWINGS
[0016] Figure 1 It is a structural schematic diagram of the construction structure of the underground pipe gallery below the intersection of the utility model;
[0017] Figure 2 The utility model is a construction flow chart of the construction structure of the underground pipe gallery below the intersection of the underground pipe gallery. DETAILED DESCRIPTION
[0018] The present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments, but the embodiments should not be construed as limiting the present invention.
[0019] See also Figure 1The utility model provides a construction structure of a pipe gallery below an intersection of an underground pipe gallery, comprising an existing underground pipe gallery 1, a notch 3 being provided at the intersection of the existing underground pipe gallery 1 and the underground pipe gallery 2 under construction, the notch 3 being formed by dismantling the structure at the intersection corresponding to the existing underground pipe gallery 1, a foundation pit 4 being provided below the intersection, an underground pipe gallery 2 under construction being provided in the foundation pit 4 and extending along its length direction, the underground pipe gallery 2 under construction being located at the bottom of the existing underground pipe gallery 1, a plurality of steel bars 5 being provided on the slopes on both sides of the foundation pit 4 along their slope direction, the steel bars 5 being inserted into the slopes of the foundation pit 4 at a certain angle, in one or more embodiments, the angle ɑ between the steel bars 5 and the horizontal plane is 15°, and three rows of steel bars 5 are provided on each side of the slopes of the foundation pit 4 from high to low; a first soil nail hanging steel mesh sprayed concrete layer 6 is provided on the slopes on both sides of the foundation pit 4, a backfill layer 7 is provided between both sides of the underground pipe gallery 2 under construction and the foundation pit 4, and in one or more embodiments, the backfill layer 7 is a C20 concrete layer.
[0020] The top of the existing underground pipe gallery 1 on both sides of the gap 3 is provided with a slope protection 8 with a certain slope β. In one or more embodiments, the slope β of the slope protection 8 is 1:1.5. The slope surface of the slope protection 8 is provided with a second soil nail hanging steel mesh sprayed concrete layer 9.
[0021] A newly built underground pipeline gallery 10 connected to the existing underground pipeline galleries 1 at both ends is provided at the gap 3, and the bottom of the newly built underground pipeline gallery 10 is connected to the top of the underground pipeline gallery 2 under construction.
[0022] The foundations on the existing underground pipe gallery 1 and on both sides of the underground pipe gallery 2 under construction are respectively a plain fill layer 11, a clay layer 12, a crushed stone layer 13 and a clay rock layer 14 from top to bottom.
[0023] See also Figure 2 The construction method of the construction structure of the underground pipe gallery below the intersection of the utility model comprises the following steps:
[0024] (1) Remove the existing underground pipe gallery 1 above the intersection of the existing underground pipe gallery 1 and the underground pipe gallery 2 under construction;
[0025] (2) Excavation of the lower foundation pit 4;
[0026] (3) constructing a soil nail hanging steel mesh sprayed concrete layer 6 structure to support the foundation pit 4 below;
[0027] (4) Laying the underground pipe gallery 2 under construction;
[0028] (5) Backfilling the foundation pit 4 with concrete to form a backfill layer 7;
[0029] (6) Connect the underground pipeline corridor 2 under construction with the existing underground pipeline corridor 1 and backfill.
[0030] Obviously, those skilled in the art can make various changes and modifications to the present invention without departing from the spirit and scope of the present invention. Thus, if these modifications and variations of the present invention fall within the scope of the claims of the present invention and their equivalents, the present invention is also intended to include these modifications and variations.
[0031] The contents not described in detail in this specification belong to the prior art known to professional and technical personnel in this field.
Claims
1. A construction structure of a pipe gallery below an underground pipe gallery intersection, comprising an existing underground pipe gallery (1), characterized in that: A notch (3) is provided at the intersection of the existing underground pipe gallery (1) and the underground pipe gallery (2) under construction. The notch (3) is formed by dismantling the structure at the intersection corresponding to the existing underground pipe gallery (1). A foundation pit (4) is provided below the intersection. The foundation pit (4) is provided with an underground pipe gallery (2) under construction extending along its length direction. The underground pipe gallery (2) under construction is located at the bottom of the existing underground pipe gallery (1). A plurality of steel bars (5) are provided on the slopes on both sides of the foundation pit (4) along the direction of their slope. The steel bars (5) are inserted into the slopes of the foundation pit (4) at a certain angle. A first soil nail-hanging steel mesh sprayed concrete layer (6) is provided on the slopes on both sides of the foundation pit (4). A backfill layer (7) is provided between the two sides of the underground pipe gallery (2) under construction and the foundation pit (4).
2. The construction structure of the underground pipe gallery below the intersection of the underground pipe gallery according to claim 1 is characterized by: The angle ɑ between the steel bar (5) and the horizontal plane is 15°.
3. The construction structure of the underground pipe gallery below the intersection of the underground pipe gallery according to claim 2 is characterized by: The tops of the existing underground pipe galleries (1) on both sides of the notch (3) are provided with slope protection (8) with a certain slope β.
4. The construction structure of the underground pipe gallery below the intersection of the underground pipe gallery according to claim 3 is characterized by: The slope of the slope protection (8) is β=1:1.
5.
5. The construction structure of the underground pipe gallery below the intersection of the underground pipe gallery according to claim 4 is characterized by: The slope surface of the slope protection (8) is provided with a second soil nail-hung steel mesh sprayed concrete layer (9).
6. The construction structure of the underground pipe gallery below the intersection of the underground pipe gallery according to claim 5 is characterized by: A newly built underground pipe gallery (10) connected to the existing underground pipe galleries (1) at both ends is provided at the notch (3); the bottom of the newly built underground pipe gallery (10) is connected to the top of the underground pipe gallery (2) under construction.
7. The construction structure of the underground pipe gallery below the intersection of the underground pipe gallery according to claim 6 is characterized by: The backfill layer (7) is a C20 concrete layer.
8. The construction structure of the underground pipe gallery below the intersection of the underground pipe gallery according to claim 7 is characterized by: Three rows of steel bars (5) are arranged from high to low on the slope surface on each side of the foundation pit (4).
9. The construction structure of the underground pipe gallery below the intersection of the underground pipe gallery according to claim 8, characterized in that: The foundations on the existing underground pipe gallery (1) and on both sides of the underground pipe gallery (2) under construction are, from top to bottom, a plain fill layer (11), a clay layer (12), a crushed stone layer (13) and a clay rock layer (14).