Soft soil stratum underground excavation station arch wall separation type frame structure
By adopting an arch-wall separated frame structure in subway stations on soft soil, and using components such as bored interlocking piles and secondary lining arch covers to form a reliable rigid connection, the problems of low construction efficiency, high cost and poor waterproofing quality in traditional underground excavation methods were solved, achieving rapid and efficient construction and improving structural stability.
Patent Information
- Application Number
- CN202423035724.8
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-12-10
- Publication Date
- 2025-09-12
- Estimated Expiration
- 2034-12-10
AI Technical Summary
Existing technologies for underground excavation construction of subway stations in soft soil areas have problems such as low construction efficiency, long construction period, high cost, poor waterproofing quality, and uncontrollable deformation. In particular, traditional underground excavation methods such as the double-side wall pilot tunnel method and the center hole method have disadvantages such as slow excavation speed, complex construction, high support cost, and easy cracking of the lining.
A separate frame structure with arch walls is adopted for underground excavation stations in soft soil strata, including bored interlocking piles, crown beams, secondary lining arch covers, inverted arches, hidden beams, frame side columns, frame side beams, middle plates, screen door installation vertical beams and thin side walls. Drilled interlocking piles are used as side wall supports to form a reliable rigid connection. Combined with the secondary lining arch cover and inverted arch, the support structure is reduced, and the construction efficiency and waterproof performance are improved.
Significantly shorten the construction period, improve construction efficiency, reduce support costs, enhance structural rigidity and waterproof performance, reduce geological environment construction risks, reduce concrete consumption, and achieve fast and efficient construction results.
Smart Images
Figure CN223330585U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the field of urban rail transit engineering design and construction technology, in particular to a soft soil stratum underground excavation station arch wall separated frame structure Background Art
[0002] Urban rail transit projects are characterized by complex surrounding environments, numerous constraints, and long construction cycles. For subway stations in soft soil areas that are not suitable for open-cut construction, concealed excavation methods such as double-side wall pilot pits, center-hole methods, pile methods, and CRD are commonly used. The core concept is to reduce the large to the small, break the whole into parts, and trade time for space. There are usually two methods: one is to set up temporary span reduction supports inside the tunnel, dividing the heading into several small pilot pits. After all pilot pits are excavated, the temporary supports are removed and replaced with permanent linings by utilizing the spatial effect of initial support. The other is to excavate several small pilot pits at laterally intervals in advance, and first construct a beam-column bearing system with support and span reduction functions inside the pilot pits. Under the protective effect of these systems, the small pilot pits are then gradually expanded to form a large-span space, followed by the installation of the remaining permanent lining.
[0003] Although these two underground excavation construction methods have been popularized and applied in soft soil areas such as Beijing and Shanghai, and the technology is very mature, their shortcomings and disadvantages are also very obvious. The disadvantages of the first construction method are slow excavation speed, low construction efficiency, high construction period pressure, high risk of dismantling support, large amount of waste materials, complex process conversion, and high support cost; in addition to the above disadvantages, the second construction method also has the disadvantages of poor waterproofing quality, uncontrollable deformation, low mechanical degree, easy cracking of lining, frequent operation rectification, etc. Therefore, the utility model provides a soft soil underground excavation station arch wall separated frame structure. Utility Model Content
[0004] In response to the above technical problems, the utility model discloses an arch-wall separated frame structure of a concealed excavation station in soft soil, comprising bored interlocking piles, crown beams, secondary lining arch covers, inverted arches, concealed beams, frame side columns, frame side beams, middle plates, screen door mounting vertical beams and thin side walls; two bored interlocking piles are provided, the two bored interlocking piles are symmetrically distributed, the bored interlocking piles are driven vertically downward from the ground surface, frame side beams are provided on the inner pile tops of the bored interlocking piles, frame side beams are connected between the frame side beams and the concealed beams, the top end of the bored interlocking piles is lower than the guide pit of the inverted arch, and the pile bottom of the bored interlocking pile is embedded to a certain depth below the inverted arch.
[0005] Furthermore, the top ends of the two crown beams are connected to the second lining arch cover through reserved dowel bars, and the crown beams are located at the tops of the bored interlocking piles and are continuously arranged along the longitudinal direction of the station.
[0006] Furthermore, concealed beams are pre-buried at both ends of the inverted arch, the concealed beams are continuously arranged along the longitudinal direction of the station, and the concealed beams are connected to the bored interlocking piles.
[0007] Furthermore, the thickness of the frame side column is equal to the width of the hidden beam, and the upper end of the frame side column is connected to the frame side beam, and the lower end of the frame side column is inserted into the inverted arch and connected to the hidden beam.
[0008] Furthermore, the frame side column is backed against the drilled bite pile joint position, and multiple frame side columns are longitudinally arranged, and the spacing between the multiple longitudinally arranged columns is equal to the width of the drilled bite pile.
[0009] Furthermore, the longitudinal direction of the frame side columns is filled with thin side walls, and both ends of the thin side walls are respectively connected to the frame side beams and hidden beams.
[0010] Furthermore, the surface of the connection between the frame side beam and the bored interlocking pile is continuously cast, and the two ends of the middle plate are respectively inserted into the two frame side beams, and the middle plate forms a rigid connection node with the frame side beam, frame side column and thin side wall.
[0011] Furthermore, the shield door installation vertical beam and the middle plate are cast simultaneously to improve the structural strength.
[0012] Furthermore, the bored interlocking piles are designed for installation in a permanent structure, and the normal service life of the bored interlocking piles is consistent with the design life of the subway station.
[0013] Compared with the prior art, the present invention has the following advantages: (1) the present invention does not need to set up a span reduction support at the bottom of the station on soft soil, which satisfies the working space of large machinery. The soil can be quickly excavated in a layered manner, which greatly shortens the construction period and improves the construction efficiency. The vertical construction from the surface with bored interlocking piles is precise, fast and efficient. When excavating in the hole, there is no need to set up a side wall support structure, which significantly saves support time and cost. (2) The use of bored interlocking piles as side wall support has greater rigidity and strength than the traditional dark excavation anchor spraying grid support. The upper secondary lining arch cap forms a reliable rigid connection, significantly reducing or even completely eliminating the geological environment construction risk of excavating the lower soil of the station. The bored interlocking piles have good water-stopping effect and strong anti-seepage performance, and can also serve as a permanent load-bearing structure for the side walls, adjusting the traditional thick side walls into a combination of frame side columns and thin side walls, reducing the amount of concrete and the content of structural steel bars; (3) Compared with traditional construction technologies such as double-side wall pilot pit method, hole pile method, and middle hole method, in terms of the construction scale of a conventional single station in soft soil strata, the use of this patented technology can shorten the construction period by at least 14 months and save civil engineering costs. BRIEF DESCRIPTION OF THE DRAWINGS
[0014] Figure 1 This is the cross section of the arch-wall separated frame structure of the utility model Figure 1 .
[0015] 2 is the cross section of the arch-wall separated frame structure of the utility model Figure 2 .
[0016] Figure 3 This is a diagram of a rapid construction method for the arch-wall separated frame structure of the present utility model.
[0017] Figure numbers: 1- bored interlocking piles; 2- outer primary support; 3- inner primary support; 4- waterproof layer; 5- crown beam; 6- secondary lining arch cover; 7- tunnel bottom cushion; 8- inverted arch; 9- hidden beam; 10- frame side column; 11- frame side beam; 12- middle plate; 13- vertical beam for screen door installation; 14- thin side wall; 15- platform slab; 16- inverted arch backfill. DETAILED DESCRIPTION
[0018] It should be noted that, in the absence of conflict, the embodiments of the present invention and the features therein can be combined with each other.
[0019] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present invention. In addition, the terms "first", "second", etc. are only used for descriptive purposes and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, features defined as "first", "second", etc. may explicitly or implicitly include one or more of the features. In the description of the present invention, unless otherwise specified, "multiple" means two or more.
[0020] In the description of this utility model, it should be noted that, unless otherwise expressly specified or limited, the terms "installed," "connected," and "connected" should be understood in a broad sense. For example, they can refer to fixed connections, detachable connections, or integral connections; mechanical connections, electrical connections; direct connections, indirect connections through an intermediate medium, and internal communication between two components. Those skilled in the art will understand the specific meanings of the above terms in this utility model based on specific circumstances.
[0021] Example: Figure 1-Figure 3As shown, a soft soil underground excavation station arch wall separation frame structure includes bored interlocking piles 1, outer layer initial support 2, inner layer initial support 3, waterproof layer 4, crown beam 5, secondary lining arch cover 6, inverted arch 8, concealed beam 9, frame side column 10, frame side beam 11, middle plate 12, screen door installation vertical beam 13, thin side wall 14, platform slab 15 and inverted arch backfill 16. After the bored interlocking piles 1, outer layer initial support 2, inner layer initial support 3, waterproof layer 4, crown beam 5, secondary lining arch cover 6, tunnel bottom cushion 7, inverted arch 8, concealed beam 9, frame side column 10, frame side beam 11, middle plate 12, screen door installation vertical beam 13 and thin side wall 14 are completed, the platform slab 15 and inverted arch backfill 16 are constructed;
[0022] Two bored interlocking piles 1 are provided, and the two bored interlocking piles 1 are symmetrically distributed. The bored interlocking piles 1 are driven vertically downward from the ground surface. The wall thickness of the bored interlocking pile 1 is 1000 mm and the width is 6000 mm. A frame side beam 11 is provided at the inner pile top of the bored interlocking pile 1. A frame side column 10 is connected between the frame side beam 11 and the hidden beam 9. The top end of the bored interlocking pile 1 is 500 mm lower than the guide pit of the inverted arch 8, and the bottom of the bored interlocking pile 1 is embedded in the bottom of the inverted arch 8 to a depth of 5000 mm.
[0023] The tops of the two crown beams 5 are connected to the two ends of the secondary lining arch cover 6 through reserved dowel bars. The crown beams 5 are located at the top of the bored interlocking piles 1 and are continuously arranged along the longitudinal direction of the station. The width of the crown beams 5 is equal to the wall thickness of the bored interlocking piles 1. The outer side of the secondary lining arch cover 6 is provided with a waterproof layer 4, an inner initial support 3, and an outer initial support 2 from the inside to the outside. The thickness of the outer initial support 2 is 300mm. The outer initial support 2 includes a plurality of first grid steel frames evenly spaced. The first grid steel frames are arranged at intervals of 1 / 4. The spacing is 500mm, the thickness of the inner initial support 3 is 250mm, the inner initial support 3 includes a plurality of second grid steel frames evenly spaced, the second interval steel frame arrangement spacing is 1000mm, the first grid steel frame and the second grid steel frame are staggered. During the construction process, temporary span reduction support is erected at the same time as the outer initial support 2 is erected. The thickness of the temporary span reduction support is 300mm. After the outer initial support 2 and the temporary span reduction support are completed, the inner initial support 3 is erected.
[0024] Hidden beams 9 are pre-buried at both ends of the inverted arch 8. The hidden beams 9 are continuously arranged along the longitudinal direction of the station. The hidden beams 9 are connected to the bored interlocking piles 1. The thickness of the frame side column 10 is equal to the width of the hidden beam 9. The width of the hidden beam 9 is 1200mm, and the upper end of the frame side column 10 is connected to the frame side beam 11. The lower end of the frame side column 10 is inserted into the inverted arch 8 and connected to the hidden beam 9. The width of the frame side column 10 is 700mm and the length is 900mm.
[0025] The frame side column 10 is backed against the joint position of the bored interlocking pile 1. There are multiple frame side columns 10 arranged longitudinally. The spacing between the multiple longitudinal arrangements is equal to the width of the bored interlocking pile 1. A deformation safety margin is reserved between the frame side column 10 and the bored interlocking pile 1. The deformation safety margin is 100mm. In the later stage, energy-consuming water-stopping materials are used to embed firmly and fill densely. The longitudinal direction of the frame side column 10 is filled with a thin side wall 14. The two ends of the thin side wall 14 are respectively connected to the frame side beam 11 and the hidden beam 9. The thickness of the thin side wall 14 is 300mm.
[0026] The surface of the connection between the frame side beam 11 and the bored interlocking pile 1 is continuously cast. The height of the frame side beam 11 is 1000mm and the width is 900mm. The width of the frame side beam 11 on one side is 100mm wider than the frame side column 10. The two ends of the middle plate 12 are respectively inserted into the two frame side beams 11. The middle plate 12 forms a rigid connection node with the frame side beam 11, the frame side column 10 and the thin side wall 14. The shield door installation vertical beam 13 and the middle plate 12 are cast at the same time to improve the structural strength, so that the shield door installation vertical beam 13 and the middle plate 12 are subjected to force together to avoid corrosion, vibration and falling off during operation.
[0027] The bored interlocking pile 1 is designed to be installed in a permanent structure. The normal service life of the bored interlocking pile 1 is consistent with the design life of the subway station, which is 100 years.
[0028] Furthermore, it should be noted that the shapes and names of the parts and components of the specific embodiments described in this specification may vary. Any equivalent or simple variations based on the concepts, structures, features, and principles of this utility model are included within the scope of protection of this utility model. Persons skilled in the art of this utility model may make various modifications, additions, or substitutions to the described specific embodiments, and these modifications, as long as they do not deviate from the structure of this utility model or exceed the scope defined by these claims, shall fall within the scope of protection of this utility model.
Claims
1. A soft soil underground tunnel station arch wall separated frame structure, characterized by: The invention comprises a bored occlusal pile (1), a crown beam (5), a secondary lining arch cover (6), an inverted arch (8), a concealed beam (9), a frame side column (10), a frame side beam (11), a middle plate (12), a screen door installation vertical beam (13) and a thin side wall (14); two bored occlusal piles (1) are provided, and the two bored occlusal piles (1) are symmetrically distributed. The bored occlusal piles (1) are driven vertically downward from the ground surface, the inner pile top of the bored occlusal pile (1) is provided with a frame side beam (11), the frame side beam (11) and the concealed beam (9) are connected with a frame side column (10), the top end of the bored occlusal pile (1) is lower than the pilot pit of the inverted arch (8), and the pile bottom of the bored occlusal pile (1) is embedded to a certain depth below the inverted arch (8).
2. The arch-wall separated frame structure of a submerged excavation station in soft soil as claimed in claim 1, characterized in that: The top ends of the two crown beams (5) are connected to the second lining arch cover (6) via reserved dowel bars. The crown beams (5) are located at the tops of the bored interlocking piles (1) and are continuously arranged along the longitudinal direction of the station.
3. The arch-wall separated frame structure of a submerged station in soft soil as claimed in claim 2, characterized in that: Both ends of the inverted arch (8) are pre-buried with hidden beams (9), the hidden beams (9) are continuously arranged along the longitudinal direction of the station, and the hidden beams (9) are connected to the bored interlocking piles (1).
4. The arch-wall separated frame structure of a submerged station in soft soil as claimed in claim 3, characterized in that: The thickness of the frame side column (10) is equal to the width of the hidden beam (9), and the upper end of the frame side column (10) is connected to the frame side beam (11), and the lower end of the frame side column (10) is inserted into the inverted arch (8) and connected to the hidden beam (9).
5. The arch-wall separated frame structure of a submerged excavation station in soft soil as claimed in claim 4, characterized in that: The frame side column (10) is backed against the joint position of the bored occlusal pile (1), and a plurality of the frame side columns (10) are longitudinally arranged, and the spacing between the plurality of longitudinally arranged columns is equal to the width of the bored occlusal pile (1).
6. The arch-wall separated frame structure of a submerged tunnel station in soft soil as claimed in claim 5, characterized in that: The longitudinal direction of the frame side column (10) is filled by a thin side wall (14), and the two ends of the thin side wall (14) are respectively connected to the frame side beam (11) and the hidden beam (9).
7. The arch-wall separated frame structure of a tunnel station in soft soil as claimed in claim 6, characterized in that: The surface of the connection between the frame side beam (11) and the bored interlocking pile (1) is continuously cast, and the two ends of the middle plate (12) are respectively inserted into the two frame side beams (11), and the middle plate (12) forms a rigid connection node with the frame side beam (11), the frame side column (10) and the thin side wall (14).
8. The arch-wall separated frame structure of a submerged station in soft soil as claimed in claim 7, characterized in that: The shield door installation vertical beam (13) and the middle plate (12) are cast simultaneously to improve the structural strength.
9. The arch-wall separated frame structure of a submerged station in soft soil as claimed in claim 8, characterized in that: The bored interlocking piles (1) are designed for installation of permanent structures, and the normal service life of the bored interlocking piles (1) is consistent with the design life of the subway station.