Retaining wall structure for backfill soil construction on upper portion of tunnel
By designing a multi-layer structure of the tunnel backfill upper backfill construction retaining wall, the problems of insufficient side pressure and slow construction speed of traditional retaining wall structures are solved, and a higher barrier effect and faster construction speed are achieved.
Patent Information
- Application Number
- CN202421662070.9
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-07-15
- Publication Date
- 2025-05-16
- Estimated Expiration
- 2034-07-15
AI Technical Summary
In traditional tunnel construction, the retaining wall structure bears less side pressure, and the construction operation is complicated and the construction speed is slow.
A retaining wall structure for the upper backfill of the tunnel is designed, including an ring tunnel and a retaining wall assembly arranged at its upper end. The assembly consists of panels, toe plates, heel plates, buttresses, geogrids and reinforced earth backfill layers, through which multi-layer structures are formed to improve the barrier effect.
The device effectively bears the side pressure of the reinforced soil backfill layer, improves the barrier effect, ensures construction quality and overall stability, and at the same time improves the construction speed and facilitates operation.
Smart Images
Figure CN222878747U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of retaining walls, in particular to a retaining wall structure for backfilling soil on the upper part of a tunnel. Background Art
[0002] Backfill refers to the compacted soil returned after the foundation and other below-ground works are completed during construction. The backfill methods include: manual backfill; mechanical backfill, which generally includes bulldozer backfill, shovel loader backfill, and car backfill; compaction methods, which generally include rolling, tamping, vibration compaction, and compaction using earth moving tools. For large-scale backfill projects, rolling and compaction using earth moving tools are often used, while for smaller backfill projects, compaction with tamping tools is more appropriate.
[0003] During the tunnel construction process, it is also necessary to backfill the backfill soil according to the needs. In the traditional retaining wall manufacturing method, the brickwork method is relatively simple, the cost is low, and the scope of use is wide, or an anchored retaining wall is used. During use, these methods only have a retaining wall structure, the lateral pressure they bear is small, and the construction operation is relatively complicated and the construction speed is slow. Therefore, we proposed a retaining wall structure for backfilling the upper part of the tunnel to solve the above problems. Utility Model Content
[0004] The utility model provides a retaining wall structure constructed by backfilling soil on the upper part of a tunnel to solve the problems raised in the above background technology.
[0005] In order to achieve the above purpose, the utility model adopts the following technical solutions:
[0006] A retaining wall structure constructed by backfilling soil on the upper part of a tunnel comprises a ring tunnel and a retaining wall assembly arranged at the upper end thereof, wherein the retaining wall assembly comprises a panel, a toe plate, a heel plate, and a buttress, a bottom beam is extendedly arranged on one side of the heel plate, a connecting beam is arranged on the other side of the bottom beam, a crushed stone layer is arranged on the side of the panel close to the buttress, a plurality of geogrids are arranged in layers on the other side of the crushed stone layer, a reinforced soil backfill layer is filled above each layer of the geogrid, and clay layers are arranged at the bottom and the upper end of the reinforced soil backfill layer respectively.
[0007] Preferably, a toe plate is provided at one side of the bottom of the panel away from the buttress, a heel plate is provided at the other side of the bottom of the panel, and a triangular buttress is installed between the heel plate and the panel.
[0008] Preferably, a plurality of drainage holes are connected through the panel, and deep cutting waists are respectively provided on both sides of the upper end of the panel.
[0009] Preferably, the two clay layers are respectively arranged above the heel plate and inside the upper end of the panel.
[0010] Preferably, the geogrid is a bidirectional polypropylene geogrid, the geogrid is compacted by layered filling, and the geogrid is bent and inverted at one end close to the panel.
[0011] Preferably, the panel, toe plate and heel plate include a plurality of panel steel bars, the buttress includes a plurality of buttress horizontal bars, buttress vertical bars and buttress tension bars, and a concrete protective layer is arranged outside the plurality of panel steel bars, buttress horizontal bars, buttress vertical bars and buttress tension bars.
[0012] Preferably, a plurality of the panel reinforcement bars are vertically cross-connected, and a plurality of the buttress horizontal reinforcement bars, buttress vertical reinforcement bars and buttress force reinforcement bars are vertically and obliquely cross-connected.
[0013] The beneficial effects of the utility model are:
[0014] 1. The device forms a retaining wall structure through the set panel, toe plate, heel plate and buttress, which is used to block the reinforced soil backfill layer formed by backfilling, effectively bear the lateral pressure of the reinforced soil backfill layer, and improve the blocking effect through the setting of multi-layer geogrids and their bending and reverse packaging, and ensure the construction quality and overall stability of the reinforced soil backfill layer.
[0015] 2. The device pours concrete outside the panel reinforcement, buttress horizontal reinforcement, buttress vertical reinforcement and buttress force reinforcement to prefabricate the panel toe plate, heel plate and buttress, and then transports them to the installation point, thereby increasing the construction speed and facilitating operation.
[0016] In summary, the device can not only block the reinforced soil backfill layer formed by backfilling, effectively bear the lateral pressure of the reinforced soil backfill layer, ensure the construction quality and overall stability of the reinforced soil backfill layer, but also improve the construction speed and facilitate operation. BRIEF DESCRIPTION OF THE DRAWINGS
[0017] Figure 1 It is a structural schematic diagram of the utility model.
[0018] Figure 2 It is a structural schematic diagram of the reinforced soil backfill layer of the utility model.
[0019] Figure 3 It is a structural schematic diagram of the panel reinforcement of the utility model.
[0020] Figure 4 For this utility model Figure 3 Schematic diagram of the structure of AA.
[0021] Numbers in the figure: 1. Ring tunnel; 2. Retaining wall assembly; 201. Panel; 202. Toe board; 203. Heel plate; 204. Buttress; 205. Scupper hole; 206. Deep cut waist; 3. Bottom beam; 4. Connecting beam; 5. Gravel layer; 6. Clay layer; 7. Reinforced soil backfill layer; 8. Geogrid; 9. Buttress horizontal reinforcement; 10. Buttress vertical reinforcement; 11. Buttress tension reinforcement; 12. Panel reinforcement; 13. Concrete protective layer. DETAILED DESCRIPTION
[0022] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all of the embodiments.
[0023] Reference Figure 1 and Figure 2 As shown, the present embodiment provides a retaining wall structure for backfilling the upper part of a tunnel, comprising a ring tunnel 1 and a retaining wall assembly 2 arranged at the upper end thereof, the retaining wall assembly 2 comprising a panel 201, a toe plate 202, a heel plate 203, and a buttress 204, a bottom beam 3 is extended on one side of the heel plate 203, a connecting beam 4 is arranged on the other side of the bottom beam 3, a crushed stone layer 5 is arranged on the side of the panel 201 close to the buttress 204, and a plurality of geogrids 8 are arranged in layers on the other side of the crushed stone layer 5, the geogrid 8 is a bidirectional polypropylene geogrid, the geogrid 8 is compacted by layered filling, the end of the geogrid 8 close to the panel 201 is bent and inverted, and is used in conjunction with the retaining wall assembly 2 to further improve the retaining effect, a reinforced soil backfill layer 7 is filled above each layer of the geogrid 8, a clay layer 6 is arranged at the bottom and the upper end of the reinforced soil backfill layer 7, and two clay layers 6 are arranged above the heel plate 203 and on the inner side of the upper end of the panel 201, respectively.
[0024] like Figure 1 and Figure 2 As shown, a toe plate 202 is provided on one side of the bottom of the panel 201 away from the buttress 204, a heel plate 203 is provided on the other side of the bottom of the panel 201, and a triangular buttress 204 is installed between the heel plate 203 and the panel 201 to form a retaining wall, which is used in conjunction with the geogrid 8 on the inner side to block the reinforced soil backfill layer 7 to prevent soil blocks from sliding, effectively bear the lateral pressure of the reinforced soil backfill layer 7, and ensure the quality of construction and overall stability. A plurality of drainage holes 205 are connected through the panel 201 for drainage, and deep cutting waists 206 are respectively provided on both sides of the upper end of the panel 201.
[0025] like Figure 2-Figure 4As shown, the panel 201, the toe plate 202 and the heel plate 203 include a plurality of panel steel bars 12, and the buttress 204 includes a plurality of buttress horizontal bars 9, buttress vertical bars 10 and buttress tension bars 11. A concrete protective layer 13 with a thickness of 35 mm is arranged outside the plurality of panel steel bars 12, buttress horizontal bars 9, buttress vertical bars 10 and buttress tension bars 11, and is respectively used for casting and prefabricating the panel 201, the toe plate 202, the heel plate 203 and the buttress 204. The plurality of panel steel bars 12 are vertically cross-connected to form the panel 201, the toe plate 202 and the heel plate 203. The plurality of buttress horizontal bars 9, buttress vertical bars 10 and buttress tension bars 11 are vertically and obliquely cross-connected to form the buttress 204.
[0026] The working principle of the utility model is: when the device is in use, first positioning and laying out, carrying out pile protection and repair, grouting, hardening the surface layer, retaining wall assembly 2, bottom beam 3, connecting beam 4 and steel pipe pile construction, and then when the retaining wall assembly 2 reaches the designed strength, start backfilling the clay between the bottom beams 3 to form a clay layer 6 below, and lay the bottom geogrid 8, and lay a layer of geogrid 8 for each layer of reinforced soil backfill layer 7 with a height of 1m, and reverse the connection, repeat the operation until the appropriate height is reached, and after the pipeline construction is completed, continue to backfill the upper clay layer 6.
[0027] The above description is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes within the technical scope disclosed by the present invention according to the technical scheme and the utility model concept of the present invention, which should be covered by the protection scope of the present invention.
Claims
1. A retaining wall structure for backfilling the upper part of a tunnel, comprising a ring tunnel (1) and a retaining wall assembly (2) arranged at the upper end thereof, characterized in that: The retaining wall assembly (2) comprises a panel (201), a toe plate (202), a heel plate (203), and a buttress (204); a bottom beam (3) is extended on one side of the heel plate (203); a connecting beam (4) is arranged on the other side of the bottom beam (3); a crushed stone layer (5) is arranged on the side of the panel (201) close to the buttress (204); a plurality of geogrids (8) are arranged in layers on the other side of the crushed stone layer (5); a reinforced soil backfill layer (7) is filled above each layer of the geogrid (8); and clay layers (6) are arranged at the bottom and the top of the reinforced soil backfill layer (7), respectively.
2. A retaining wall structure constructed by backfilling soil on the upper part of a tunnel according to claim 1, characterized in that: A toe plate (202) is arranged on one side of the bottom of the panel (201) away from the buttress (204), a heel plate (203) is arranged on the other side of the bottom of the panel (201), and a triangular buttress (204) is installed above the heel plate (203) and between the panel (201).
3. A retaining wall structure constructed by backfilling soil on the upper part of a tunnel according to claim 2, characterized in that: The panel (201) is penetrated by a plurality of drainage holes (205), and deep cut waists (206) are respectively provided on both sides of the upper end of the panel (201).
4. A retaining wall structure constructed by backfilling soil on the upper part of a tunnel according to claim 1, characterized in that: The two clay layers (6) are respectively arranged above the heel plate (203) and on the inner side of the upper end of the panel (201).
5. A retaining wall structure constructed by backfilling soil on the upper part of a tunnel according to claim 1, characterized in that: The geogrid (8) is a bidirectional polypropylene geogrid. The geogrid (8) is compacted by layered filling. One end of the geogrid (8) close to the panel (201) is bent and inverted.
6. A retaining wall structure constructed by backfilling soil on the upper part of a tunnel according to claim 2, characterized in that: The panel (201), toe plate (202) and heel plate (203) include a plurality of panel steel bars (12); the buttress (204) includes a plurality of buttress horizontal bars (9), buttress vertical bars (10) and buttress tension bars (11); a concrete protective layer (13) is arranged outside the plurality of panel steel bars (12), buttress horizontal bars (9), buttress vertical bars (10) and buttress tension bars (11).
7. A retaining wall structure constructed by backfilling soil on the upper part of a tunnel according to claim 6, characterized in that: A plurality of the panel steel bars (12) are vertically cross-connected, and a plurality of the buttress horizontal bars (9), buttress vertical bars (10) and buttress force bars (11) are vertically and obliquely cross-connected.