Top plate backfilling construction structure and subway station construction structure
By setting up a grid-like partition structure and fixing components on the main structure of the roof slab, the problem of uneven settlement of soil during the backfilling process of the roof slab was solved, achieving uniform settlement of the soil and stability of the structure, thus ensuring the construction and operation safety of the subway station.
Patent Information
- Application Number
- CN202423105425.7
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-12-16
- Publication Date
- 2026-01-23
- Estimated Expiration
- 2034-12-16
AI Technical Summary
During the backfilling process of the subway station roof slab, uneven compaction of the soil material leads to uneven settlement, which affects the smoothness of the road surface and the integrity of the external waterproof layer, thereby affecting the waterproofing effect of the station and the driving safety.
A grid-like partition structure is set on the main structure of the top slab. Flowable soil material is used for backfilling and connected to the soil through fixing components to form a grid-like support. The soil material in the partition area is solidified to form a soil body, which enhances the stability and uniformity of the soil body. The fixing components include geogrids and steel mesh to ensure uniform load transfer and tensile strength.
It effectively avoids uneven settlement during soil backfilling, enhances the uniformity of settlement and structural stability after top slab backfilling, prevents road surface cracks and waterproof layer damage, and ensures the construction and operation safety of subway stations.
Smart Images
Figure CN223824197U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The utility model relates to subway station roof structure technical field, especially, relate to a roof backfill construction structure. In addition, the utility model still relates to a subway station construction structure including the roof backfill construction structure. BACKGROUND
[0002] With the rapid development of urban rail transit, subway station construction has become an important part of urban infrastructure. Subway station is generally set below the existing road, and this construction method usually affects the normal use of the road. Before the subway station construction, the road needs to be broken first, and the ground needs to be excavated to provide construction space for the main structure of the station.
[0003] After the completion of the roof construction of the main structure of the station, in order to restore the road traffic function, the construction party usually carries out backfilling work. After backfilling, the ground often needs to be compacted to ensure the flatness and stability of the road. However, due to the shallow depth of the subway station roof, the compaction effect after backfilling is difficult to be uniform, resulting in uneven distribution of the bearing capacity of the soil under the roof, and thus uneven settlement. This settlement will directly affect the flatness of the road surface, and is easy to cause cracks or pits on the road surface, affecting the safety of driving. In addition, the outer waterproof layer of the subway station roof is also easy to be damaged during backfilling. The settlement of the soil during the roof backfilling process may cause cracks or damage to the outer waterproof layer, thereby affecting the waterproof effect of the station, and even may cause the leakage problem of the main structure of the station, bringing great pressure to the subsequent operation and maintenance. SUMMARY
[0004] The utility model provides a roof backfill construction structure and subway station construction structure to solve the technical problem of poor compaction effect of soil backfilling on the roof of the subway station in the prior art, uneven settlement, damage to the outer waterproof layer and influence on the flatness of the road surface.
[0005] According to one aspect of the utility model, a roof backfill construction structure is provided, which is applied to a subway station, the subway station includes a roof main structure, a waterproof layer arranged on the roof main structure and a protective layer arranged on the waterproof layer, and the roof backfill construction structure includes:
[0006] A separation structure is arranged on the protective layer of the target subway station, and is used for separating the upper part of the roof main structure into a plurality of separation areas in a grid shape;
[0007] Soil is used for backfilling in the separation areas in a flow state and then solidifying to form soil bodies in the separation areas;
[0008] The fixed assembly is in a grid structure and is arranged on the partition structure and connected with the soil body.
[0009] As a further improvement of the above technical solution, the partition structure comprises a masonry wall arranged at a preset height.
[0010] As a further improvement of the above technical solution, the longitudinal dimension of the partition area is 10-20 m, and the transverse dimension is 8-12 m.
[0011] As a further improvement of the above technical solution, the fixed assembly comprises a geogrid arranged on the partition structure in a symmetrical manner, and the two sides of the geogrid are connected with the soil body in the adjacent partition area.
[0012] As a further improvement of the above technical solution, the two sides of the geogrid are respectively provided with first fixing members arranged at a preset interval, and the first fixing members are used for fixing the geogrid to the soil body.
[0013] As a further improvement of the above technical solution, the fixed assembly further comprises a steel mesh arranged on the geogrid in a symmetrical manner, and the two sides of the steel mesh are connected with the geogrid or connected with the soil body.
[0014] As a further improvement of the above technical solution, the two sides of the steel mesh are respectively provided with second fixing members arranged at a preset interval, and the second fixing members are used for fixing the steel mesh to the geogrid or fixing the steel mesh to the soil body.
[0015] As a further improvement of the above technical solution, the partition structure, the soil body and the fixed assembly are arranged in multiple layers at a design elevation.
[0016] As a further improvement of the above technical solution, the height of the partition structure is 45-55 cm.
[0017] According to another aspect of the present application, a subway station construction structure is also provided, which comprises the above roof backfill construction structure.
[0018] The present application has the following beneficial effects:
[0019] The backfill construction structure of the roof plate divides the plane above the roof plate into multiple separated areas by setting a separation structure on the protective layer of the roof plate main structure after the construction is completed, so as to provide structural support for the uniform distribution of the subsequent backfill soil body and avoid the transverse flow or uneven settlement of the soil material during the backfill process; during the backfill of the soil material, the range and rate of the soil body settlement can be effectively controlled in each separated area, so as to avoid the uneven settlement of the overall structure caused by the too fast or too slow settlement of the soil body in a certain area, thereby avoiding the occurrence of road surface cracks and pits; the separation structure further enhances the structural stability, provides a stable structural framework for the subsequent backfill and solidification by means of the divided areas, effectively disperses the weight of the soil body, and reduces the influence caused by local settlement; the operability and solidification of the flow state mixed soil material are utilized, so that the backfill soil material has high stability and uniformity, and the compaction effect of the soil body separated by the grid-shaped separation structure is better, thereby effectively reducing the uneven settlement caused by the uneven compaction of the soil body during the backfill process, ensuring the uniformity of the settlement and the stability of the structure after the backfill of the roof plate, and effectively avoiding the problems of road surface cracks, pits and damage to the waterproof layer caused by uneven settlement in the traditional backfill method; the fixed components are further set to be connected with the solidified soil body to improve the tensile strength and deformation resistance of the backfill soil body, the fixed components of the grid-shaped structure form a net-shaped support to uniformly transmit the external load to a larger range, thereby reducing the risk of local settlement, effectively enhancing the compressive strength of the soil body, avoiding uneven settlement or damage caused by the load, and the grid-shaped structure has a certain constraint on the soil body, disperses the stress, prevents the backfill soil material from cracking or cracking, improves the anti-aging ability of the soil body in the long term, prevents the deformation of the backfill soil body caused by long-term load or environmental factors, the tensile strength and ductility of the soil body play a good stabilizing role in the soil body, avoid the deformation of the roof plate caused by the foundation settlement, and thereby ensure the safety of the subsequent construction and operation.
[0020] In addition to the purposes, features and advantages described above, the present application has other purposes, features and advantages. The present application will be further described below with reference to the drawings. BRIEF DESCRIPTION OF DRAWINGS
[0021] The drawings that form a part of this application are intended to provide a further understanding of the present application, and the schematic embodiments of the present application and the description thereof are intended to explain the present application, and do not constitute an improper limitation on the present application. In the drawings:
[0022] Figure 1 is a partial top view of the roof plate main structure of the preferred embodiment of the present application, wherein the separation structure is set on the roof plate main structure;
[0023] Figure 2 is a sectional view of the roof plate main structure of the preferred embodiment of the present application, wherein the separation structure is set on the roof plate main structure;
[0024] Figure 3 yes Figure 2 A magnified view of a portion of the image;
[0025] Figure 4 This is a schematic diagram of the backfilling of soil to 1 / 2 height in the first layer of the preferred embodiment of this utility model;
[0026] Figure 5 This is a schematic diagram of the structure after backfilling the first layer of the separation structure in a preferred embodiment of this utility model;
[0027] Figure 6 This is a schematic diagram of the structure of the first layer partition structure after the fixing components are installed in a preferred embodiment of the present invention;
[0028] Figure 7 yes Figure 6 A magnified view of a portion of the image;
[0029] Figure 8 This is a schematic diagram of the second layer partition structure in a preferred embodiment of the present invention;
[0030] Figure 9 This is a schematic diagram of the structure after backfilling the first layer of the separation structure in a preferred embodiment of this utility model;
[0031] Figure 10 This is a cross-sectional view of the top slab backfill construction structure of a preferred embodiment of this utility model;
[0032] Figure 11 This is a cross-sectional view of the construction structure of a subway station according to a preferred embodiment of the present invention.
[0033] Legend:
[0034] 1. Main structure of the roof slab; 2. Waterproof layer; 3. Protective layer; 4. Separation structure; 5. Soil material; 6. Geogrid; 7. First fastener; 8. Steel mesh; 9. Road structure layer; 10. Road surface. Detailed Implementation
[0035] The embodiments of the present invention will be described in detail below with reference to the accompanying drawings. However, the present invention can be implemented in many different ways as defined and covered below.
[0036] Figure 1 This is a partial top view of the top plate main structure with a partition structure in a preferred embodiment of the present invention; Figure 2 This is a cross-sectional view of the top plate main structure with a partition structure in a preferred embodiment of the present invention; Figure 3 yes Figure 2 A magnified view of a portion of the image;
[0037] Figure 4This is a schematic diagram of the backfilling of soil to 1 / 2 height in the first layer of the preferred embodiment of this utility model; Figure 5 This is a schematic diagram of the structure after backfilling the first layer of the separation structure in a preferred embodiment of this utility model; Figure 6 This is a schematic diagram of the structure of the first layer partition structure after the fixing components are installed in a preferred embodiment of the present invention; Figure 7 yes Figure 6 A magnified view of a portion of the image; Figure 8 This is a schematic diagram of the second layer partition structure in a preferred embodiment of the present invention; Figure 9 This is a schematic diagram of the structure after backfilling the first layer of the separation structure in a preferred embodiment of this utility model; Figure 10 This is a cross-sectional view of the top slab backfill construction structure of a preferred embodiment of this utility model; Figure 11 This is a cross-sectional view of the construction structure of a subway station according to a preferred embodiment of the present invention.
[0038] like Figures 1 to 10 As shown, the roof slab backfilling construction structure of this embodiment is applied to a subway station. The subway station includes a roof slab main structure 1, a waterproof layer 2 disposed on the roof slab main structure 1, and a protective layer 3 disposed on the waterproof layer 2. The roof slab backfilling construction structure includes:
[0039] The partition structure 4 is installed on the protective layer 3 of the target subway station to divide the upper part of the main structure 1 of the roof into multiple partition areas in a grid pattern.
[0040] Soil material 5 is used to backfill the partitioned area in a fluid state and then solidify within the partitioned area to form soil.
[0041] The fixing component, in the form of a grid structure, is used to be installed on the partition structure 4 and connected to the soil.
[0042] Among them, soil material 5 is preferably made by mixing excavated soil from the construction site (such as plain fill, cohesive soil, silty clay, sand, etc.) with a solidifying agent, thereby realizing the utilization of excavated soil, greatly reducing the disposal of waste soil and the borrowing of soil for backfilling, while also reducing noise generated by construction machinery and equipment, dust generated during material transportation, and carbon emissions. It not only saves a lot of labor and material costs, but also significantly reduces machinery operating costs, resulting in obvious environmental benefits.
[0043] Understandably, this roof slab backfill construction structure divides the plane above the roof slab into multiple partitioned areas by setting a partition structure 4 on the protective layer 3 of the completed roof slab main structure 1. This provides structural support for the uniform distribution of the subsequent backfill soil, preventing lateral flow or uneven settlement of the soil material 5 during backfilling. Each partitioned area effectively controls the range and rate of soil settlement during backfilling, preventing uneven settlement of the overall structure due to excessively fast or slow settlement in a particular area, thus avoiding cracks and potholes in the pavement 10. The partition structure 4 further enhances structural stability, providing a stable structural framework for subsequent backfilling and solidification by dividing the area, effectively dispersing the soil weight and reducing the impact of local settlement. Utilizing the workability and solidification properties of the fluidized mixed soil material 5, the backfill soil material 5 exhibits high stability and uniformity. Combined with the better compaction effect of the soil separated by the grid-like partition structure 4, this effectively reduces the impact of lateral flow or uneven settlement of the soil material 5. To address uneven settlement caused by uneven soil compaction during backfilling, this method ensures uniform settlement and structural stability after top slab backfilling, effectively avoiding problems such as road surface cracks, potholes, and damage to the waterproof layer 2 caused by uneven settlement in traditional backfilling methods. Furthermore, it incorporates fixing components connected to the solidified soil to enhance the tensile strength and deformation resistance of the backfill soil. The grid-like fixing components form a mesh support to evenly distribute external loads over a wider area, reducing the risk of localized settlement and effectively enhancing the compressive strength of the soil. This prevents uneven settlement or damage caused by loads. Simultaneously, the grid structure provides a certain degree of constraint on the soil, dispersing stress and preventing cracks or fissures in the backfill material 5. It also improves the soil's long-term anti-aging ability, preventing deformation of the backfill soil due to long-term loads or environmental factors. Its tensile strength and ductility provide good stability within the soil, preventing top slab deformation caused by foundation settlement, thus ensuring the safety of subsequent construction and operation.
[0044] It should be noted that the partition structure 4, soil and fixing components are evenly distributed in multiple layers according to the design elevation. That is, the partition structure 4 is built from above the protective layer 3 of the main structure 1 of the top plate. After backfilling the soil material 5 and installing the fixing components, the partition structure 4, backfilling the soil material 5 and installing the fixing components are built on this basis. The process is repeated in multiple layers until the design elevation is reached, forming a multi-layer backfill structure.
[0045] It should be noted that when backfilling soil material 5 after setting up the partition structure 4, the soil material 5 can be backfilled in multiple stages in sequence. For example, backfill each partition area to 1 / 2 of the height of the partition structure 4, and then backfill to the elevation of the partition structure 4. This effectively disperses the backfilling pressure of each partition area, reduces the risk of excessive stress on the masonry wall due to excessive lateral pressure of the soil material 5, effectively protects the structural stability of the masonry wall, and prevents the wall from cracking or deforming during the pouring of the soil material 5.
[0046] In this embodiment, the partition structure 4 includes a masonry wall at a preset height. The partition structure 4 is achieved through the masonry wall, and the wall material is selected from pressure-resistant and structurally stable materials such as bricks and concrete blocks to withstand the lateral pressure from the backfill soil.
[0047] The height of the partition structure 4 is 45-55cm, with a planned height of about 50cm, to ensure sufficient support during backfilling and to prevent the backfill material 5 from damaging the wall.
[0048] In this embodiment, the longitudinal dimension of the separated area is 10-20m, and the transverse dimension is 8-12m. Based on the construction target scale, the load requirements of the top slab, and the soil compaction, the longitudinal separation distance of the separation structure 4 is planned. The longitudinal separation distance of the grid is controlled at 10 to 20 meters. Too long a longitudinal separation may lead to excessive local settlement, while too short a separation may increase the construction difficulty. Therefore, this distance is set at 10 to 20 meters to ensure the reasonable distribution and stability of the soil. Based on the uniform stress of the soil backfill and the reduction of local high stress, the transverse separation distance of the separation structure 4 is planned. The transverse separation distance is controlled at 8-12 meters, preferably around 10 meters.
[0049] In this embodiment, the fixing component includes a geogrid 6, which is symmetrically distributed on the partition structure 4. The two sides of the geogrid 6 are connected to the soil in the adjacent partition area. The geogrid 6 is symmetrically arranged with the center line of the partition structure 4 between the two partition areas. Preferably, it is set on a masonry wall that extends longitudinally. The arrangement of the geogrid 6 is based on the center line of the masonry wall and is symmetrically arranged to ensure its balanced distribution in the overall backfill area. The geogrid 6 should be arranged along the top surface of the masonry wall and symmetrically arranged with the masonry wall as the center line. The two sides of the geogrid 6 should maintain a distance of 2m from the center line to ensure the uniform distribution of the geogrid 6 in the backfill area and help to enhance the overall stability of the soil. The geogrid 6 can be woven from high-strength polyester fiber or glass fiber. Its spacing and specifications need to be adjusted according to the characteristics of the backfill soil, compaction requirements and tensile strength. The selected geogrid 6 specifications should be able to effectively enhance the deformation resistance of the soil.
[0050] In this embodiment, first fixing members 7 are respectively provided on both sides of the geogrid 6 at preset intervals. The first fixing members 7 are used to fix the geogrid 6 to the soil. The first fixing members 7 can be steel nails to ensure the stability and long-term effectiveness of the geogrid 6 in the backfill soil. Its side is fixed to the solidified fluidized mixed soil 5. Special steel nails are designed to fix the edge of the geogrid 6 to the soil surface to avoid displacement or deformation during subsequent construction or soil settlement. Preferably, the steel nails are fixed along the fixed side of the geogrid 6 at preset intervals (e.g., 1m) to ensure that the geogrid 6 is firmly embedded in the soil. The material of the steel nails takes into account the properties of the soil and its long-term load-bearing requirements. Preferably, it is a corrosion-resistant galvanized steel nail to ensure its long-term stability. The arrangement of the geogrid 6 can significantly improve the tensile strength and deformation resistance of the backfill soil. By combining the geogrid 6 with the solidified soil, the tensile and compressive forces on the soil are effectively dispersed, preventing excessive settlement or deformation of the soil. The mesh support formed by the geogrid structure can evenly distribute external loads over a wider area, thereby reducing the risk of local settlement. By symmetrically distributing the geogrid 6 and fixing it with steel nails, an additional support layer is provided in the station roof structure, enhancing the overall stability of the soil below the roof. Especially under the action of transportation loads in subsequent use, the geogrid 6 can effectively enhance the compressive strength of the soil and avoid uneven settlement or damage caused by the load. Tension and compression of soil often lead to uneven settlement or cracking. The geogrid 6 forms a mesh structure in the soil and has a certain restraining effect. The setting of the geogrid 6 can effectively disperse this stress, prevent cracks or fissures in the backfill material 5, and improve the soil's anti-aging ability in the long term, preventing deformation of the backfill soil caused by long-term loads or environmental factors. Its tensile strength and ductility make it play an important stabilizing role in the soil, avoiding roof deformation caused by foundation settlement, thereby ensuring the safety of subsequent construction and operation.
[0051] In this embodiment, the fixing component also includes steel mesh 8, which is symmetrically distributed on the geogrid 6. The two sides of the steel mesh 8 are connected to the geogrid 6 or to the soil. The steel mesh 8 is symmetrically arranged along the centerline of the separating structure 4 between the two separating areas. It should be noted that before arranging the steel mesh 8, it is necessary to select an appropriate specification of steel mesh 8 based on the properties of the backfill soil, structural design requirements, and load requirements to effectively transmit the pressure in the backfill soil and prevent local deformation. The diameter of the steel mesh 8 is 6-12mm, and the mesh size is 10-20cm. Galvanized steel bars or stainless steel bars are preferred to ensure... To ensure its corrosion resistance during long-term use, and to prevent steel reinforcement corrosion and strength reduction due to moisture or salt in the soil; the arrangement method of steel mesh 8 is similar to that of geogrid 6, and it is symmetrically arranged based on the center line of the masonry wall to ensure uniform distribution of the structure; ensure that the distance between the two sides of the mesh and the center line is about 1m, and the arrangement of steel mesh 8 is required to be flat, without bending or twisting, to avoid affecting its reinforcement effect; by symmetrically arranging steel mesh 8 based on the center line of the masonry wall at each part of the partition structure 4, it is evenly distributed in the entire backfill area, stress and load can be smoothly transferred, and the overall compressive strength and stability of the soil can be effectively enhanced. The symmetrical arrangement ensures that all parts of the backfill area receive equal support and reinforcement, thus preventing excessive pressure in localized areas from causing settlement or damage. During the backfilling of the subway station roof slab, the soil bears a significant load, especially traffic and equipment loads above the station. By installing steel mesh, the compressive strength of the backfill soil is improved. Its mesh structure effectively disperses the load, reducing local deformation and compaction under load, allowing for a more even distribution of bearing pressure. This improves overall stability and bearing capacity, while effectively preventing cracks or large-scale damage to the backfill soil due to settlement, vibration, or load. The large-scale deformation, combined with the remaining soil, increases the overall rigidity and toughness of the soil, thereby enhancing the stability of the station structure. When encountering external pressure, it effectively distributes some of the stress, reducing soil displacement and settlement. The steel mesh 8 enhances the tensile strength of the soil, further preventing cracks caused by local settlement or stress concentration. In addition, the reinforcement effect of the steel mesh 8 not only improves the stability during the construction phase, but also provides continuous support during the long-term use of the station. During the operation of the station, under the continuous action of traffic loads, it continuously helps to disperse the load, avoids irreversible deformation of the soil after long-term stress, and extends the service life of the station structure.
[0052] In this embodiment, the two sides of the steel mesh 8 are respectively provided with second fixing members distributed at a preset interval. The second fixing members are used to fix the steel mesh 8 to the geogrid 6 or to the soil. The second fixing members can be steel nails, wire ties or other fixing members. The steel mesh 8 is fixed to the soil surface by steel bars or fixed to the geogrid 6 by wire ties to ensure that the steel mesh 8 will not be displaced or deformed during the backfilling process. The fixing points are distributed at a preset interval to ensure the stability of the mesh fixing.
[0053] On the other hand, reference Figure 11 This embodiment also provides a subway station construction structure, which uses the top slab backfill construction structure of the above preferred embodiment, and further includes a road structure layer 9 and a road surface 10 disposed above the top slab backfill construction structure.
[0054] The above description is merely a preferred embodiment of this utility model and is not intended to limit the utility model. Various modifications and variations can be made to this utility model by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this utility model should be included within the protection scope of this utility model.
Claims
1. A roof slab backfilling construction structure, applied to a subway station, the subway station comprising a roof slab main structure (1), a waterproof layer (2) disposed on the roof slab main structure (1), and a protective layer (3) disposed on the waterproof layer (2), characterized in that, The top slab backfill construction structure includes: A partition structure (4) is installed on the protective layer (3) of the target subway station to divide the upper part of the main structure (1) of the top plate into multiple partition areas in a grid pattern; Soil material (5) is used to backfill the partitioned area in a fluid state and then solidify within the partitioned area to form soil. A fixing component, in the form of a grid structure, is used to be installed on the partition structure (4) and connected to the soil.
2. The roof slab backfilling construction structure according to claim 1, characterized in that, The partition structure (4) includes a masonry wall set at a preset height.
3. The roof slab backfilling construction structure according to claim 1, characterized in that, The longitudinal dimension of the separated area is 10-20m, and the lateral dimension is 8-12m.
4. The roof slab backfilling construction structure according to claim 1, characterized in that, The fixing component includes a geogrid (6), which is symmetrically distributed on the partition structure (4). The two sides of the geogrid (6) are respectively connected to the soil in the adjacent partition area.
5. The top slab backfilling construction structure according to claim 4, characterized in that, The geogrid (6) is provided with first fixing members (7) at preset intervals on both sides. The first fixing members (7) are used to fix the geogrid (6) to the soil.
6. The top slab backfilling construction structure according to claim 4, characterized in that, The fixing component also includes steel mesh (8), which is symmetrically distributed on the geogrid (6). The two sides of the steel mesh (8) are connected to the geogrid (6) or to the soil.
7. The roof slab backfilling construction structure according to claim 6, characterized in that, The steel mesh (8) is provided with second fixing members distributed at a preset interval on both sides. The second fixing members are used to fix the steel mesh (8) to the geogrid (6) or to the soil.
8. The roof slab backfilling construction structure according to any one of claims 1-7, characterized in that, The separation structure (4), the soil, and the fixing components are evenly distributed in multiple layers according to the design elevation.
9. The roof slab backfilling construction structure according to claim 8, characterized in that, The height of the partition structure (4) is 45-55cm.
10. A construction structure for a subway station, characterized in that, The application has the top slab backfill construction structure as described in any one of claims 1-9.