CN204941551U - A kind of subway station of Curve Pipe Jacking supporting and protection structure enlarging shield-tunneling construction - Google Patents

Abstract

The utility model provides the subway station of a kind of Curve Pipe Jacking supporting and protection structure enlarging shield-tunneling construction, at least comprise vault lining cutting, side wall lining cutting, base plate, brace foundation, mid-board and platform, mid-board is located on brace foundation, the top of mid-board is connected with shield duct piece top flat, peripheral support structure is provided with between subway station and stratum, described peripheral support structure by more than 2 along the axial parallel arrangement of shield tunnel and inside built concrete curve supporting pipeline and formed, the two ends of each curve supporting pipeline connect shield duct piece top flat and shield duct piece egative film respectively, vault lining cutting and side wall lining cutting to be all positioned at inside peripheral support structure and with peripheral support anatomical connectivity, brace foundation is located on shield duct piece egative film, base plate to be positioned at above shield duct piece egative film and to be connected with shield duct piece egative film, this subway station has the advantage that structure is simple, intensity is high, supporting is safe and reliable and water-tight performance is good, is applicable to the area of water rich strata.

Description

A kind of curved pipe jacking support structure expansion shield construction subway station

technical field

The utility model relates to a subway station for expansion shield construction, which belongs to the technical field of non-excavation of underground engineering.

Background technique

With the development of our country's economy and the improvement of urbanization level, the traffic problem has become a key problem restricting the development of cities and needs to be solved urgently. As an important part of the urban public transportation network, the shield tunneling subway plays a huge role in alleviating traffic congestion, increasing the speed of urban development, and improving the modernization level of the city. However, due to the short distance between shield tunneling intervals and the large number of stations, shield tunneling often has to wait for the station to be completed before transferring, resulting in excessive excavation time and low utilization of shield tunneling equipment, resulting in delays in the construction period and increased construction costs. The shield station is the main factor restricting the construction period and cost of the subway.

At present, the commonly used construction methods of subway stations include open-cut method, cover-excavation method and underground excavation method. The open and cut method is suitable for a wide construction site, which greatly interferes with urban life, blocks traffic for a long time, and has impacts on the environment such as noise and vibration. The cover-excavation method has many slab wall and column construction joints, which need to be waterproofed. It is inconvenient to unearth, low in work efficiency, and slow in construction speed; The risk is high, and the project cost is also high. Since the above-mentioned construction method requires continuous waterproofing during the construction process, and the internal support structure is a reinforced concrete structure, the gaps inside the reinforced concrete structure in the water-rich stratum generate capillary action, and the stratum water is easy to infiltrate, causing the interior of the subway station to be damp. And formation water can slowly corrode the steel bars inside the reinforced concrete structure, so the subway stations constructed by the above method have the problems of low structural strength and poor sealing and waterproof performance.

Contents of the invention

The purpose of the utility model is to solve the deficiencies of the prior art, and provide a subway station with a curved pipe jacking support structure and expanded shield construction. The subway station has the advantages of simple structure, high strength, safe and reliable support, and good sealing and waterproof performance. Advantages, suitable for areas with rich water formations.

The technical solution adopted to realize the purpose of the utility model is, a subway station for shield tunneling construction with a curved pipe jacking support structure, which at least includes a vault lining, a side wall lining, a bottom plate, a supporting foundation, a middle partition wall and a platform, and the middle The partition wall is set on the support foundation, the top of the middle partition wall is connected to the top piece of the shield segment, and there is a peripheral support structure between the subway station and the ground. It is composed of curved support pipes arranged and poured with concrete inside. The two ends of each curved support pipe are respectively connected to the top sheet of the shield segment and the bottom sheet of the shield segment. The vault lining and side wall lining are located inside the peripheral support structure. And it is connected with the peripheral support structure, the support base is set on the bottom plate of the shield tunneling segment, and the bottom plate is located above the bottom plate of the shield tunneling segment and is fixedly connected with the bottom plate of the shield tunneling segment.

The curved support pipes are provided with grouting holes, and the gap between two adjacent curved support pipes is sealed by the grouting reinforcement area formed by the sealing grout.

The curved support pipeline is provided with two interconnected freezing tubes, and the two freezing tubes are symmetrically distributed at both ends of the inner diameter of the curved support pipeline and are attached to the inner wall of the curved support pipeline. The gaps between the supporting pipes are sealed by the frozen reinforcement zone formed by freezing.

Both the vault lining and the side wall lining are composed of a waterproof layer, a formwork and a reinforced concrete structure arranged in sequence from the outside to the inside, and the steel bars are bound to the formwork.

It can be seen from the above technical scheme that the curved pipe jacking support structure provided by the utility model expands the subway station constructed by the shield tunnel, and the peripheral support structure is added on the basis of the inner lining of the existing subway station. The peripheral support structure consists of more than two shield tunnels The tunnel axis is arranged in parallel and the interior is composed of curved support pipes poured with concrete. The two ends of each curved support pipe are respectively connected to the top sheet of the shield segment and the bottom sheet of the shield segment to form a whole. The curved support pipe The curved shape increases the force-bearing area of the pipeline and the force is more reasonable at the same time. It has better compression and deformation resistance. The vault lining and side wall lining are located inside the peripheral support structure. It plays a good protective role. Concrete is poured in the curved support pipe. The concrete structure has high rigidity, good stability and good durability.

There are grouting holes on the curved support pipes. For areas with high groundwater pressure, the grouting holes can be used to inject grout into the gap between two adjacent curved support pipes to form a grouting reinforcement area, increasing the size of the curved pipe jacking. The strength between the pipes is high, and at the same time, it has a good waterproof effect; there are two interconnected freezing pipes in the curved support pipe. For areas with poor grouting reinforcement effects, low-temperature fluid can be injected into the freezing pipes, and the low-temperature fluid passes through The freezing pipe freezes the surrounding stratum to stop water and reinforce the soil between the pipes.

The utility model provides that the vault lining and the side wall lining are both composed of a waterproof layer, a formwork and a reinforced concrete structure arranged sequentially from the outside (ground floor) to the inside (inside the subway station). The waterproof layer plays the role of secondary waterproofing. The formwork, The structure formed by pouring steel bars and concrete has high rigidity, good stability and good durability.

Description of drawings

Fig. 1 is the structural representation of the subway station that embodiment 1 provides.

FIG. 2 is a schematic cross-sectional view of the peripheral support structure in Embodiment 1. FIG.

Fig. 3 is a schematic structural diagram of the subway station provided by Embodiment 2.

FIG. 4 is a schematic cross-sectional view of the peripheral support structure in Embodiment 2. FIG.

Among them, 1-top sheet, 2-side wall lining, 3-bottom plate, 4-bottom sheet, 5-grouting hole, 6-grouting reinforcement area, 7-curve support pipe, 8-concrete, 9-support foundation, 10-partition wall, 11-vault lining, 12-freeze pipe, 13-freeze reinforcement area, 14-platform.

detailed description

The utility model is described in detail below in conjunction with the accompanying drawings and embodiments, and the content of the utility model is not limited to the following embodiments.

Embodiment 1: The utility model provides a curved pipe jacking support structure expansion shield construction subway station, its structure is shown in Figure 1, including vault lining 11, side wall lining 2, bottom plate 3, supporting foundation 9, middle The partition wall 10 and the platform 14, the middle partition wall is set on the support foundation and its top is connected with the shield segment top piece 1, the support foundation 9 is set on the shield segment bottom piece 4, and the bottom plate 3 is located above the shield tunnel segment bottom piece And it is fixedly connected with the bottom plate of the shield segment, and there is a peripheral support structure between the subway station and the ground, see Figure 2, the peripheral support structure is composed of more than two parallel arrangements along the axial direction of the shield tunnel, and the interior is poured with concrete 8 The curved support pipe 7 is composed of curved support pipes, the two ends of each curved support pipe are respectively connected to the shield segment top piece 1 and the shield segment bottom piece 4, and the curved support pipe is provided with a grouting hole 5, and two adjacent curved lines The gap between the supporting pipes is sealed by the grouting reinforcement zone 6 formed by the sealing grout; the vault lining and the side wall lining are composed of a waterproof layer, a formwork and a reinforced concrete structure arranged in sequence from the outside to the inside, and the steel bars are bound on the formwork , the vault lining 11 and the side wall lining 2 are both located inside the peripheral support structure and connected to the peripheral support structure.

Embodiment 2: The utility model provides the subway station for the expansion shield construction of the curved pipe jacking support structure. Its structure is shown in FIG. The partition wall 10 and the platform 14, the middle partition wall is set on the support foundation and its top is connected with the shield segment top piece 1, the support foundation 9 is set on the shield segment bottom piece 4, and the bottom plate 3 is located above the shield tunnel segment bottom piece And it is fixedly connected with the bottom plate of the shield segment, and there is a peripheral support structure between the subway station and the ground, see Figure 4, the peripheral support structure is composed of more than two pieces arranged in parallel along the axial direction of the shield tunnel and poured with concrete 8 The curved support pipe 7 is composed of curved support pipes, the two ends of each curved support pipe are respectively connected to the shield segment top piece 1 and the shield segment bottom piece 4, and two interconnected freezing pipes 12 are arranged in the curved support pipe. The root frozen pipes are distributed symmetrically at the two ends of the inner diameter of the curved support pipe and fit the inner wall of the curved support pipe, and the gap between two adjacent curved support pipes is sealed by the frozen reinforcement zone 13 formed by freezing; the arch Both the roof lining and the side wall lining are composed of a waterproof layer, a formwork and a reinforced concrete structure arranged in sequence from the outside to the inside, and the steel bars are bound on the formwork. Structural connections.

Claims (4)

1. the subway station of a Curve Pipe Jacking supporting and protection structure enlarging shield-tunneling construction, at least comprise vault lining cutting, side wall lining cutting, base plate, brace foundation, mid-board and platform, mid-board is located on brace foundation, the top of mid-board is connected with shield duct piece top flat, it is characterized in that: between subway station and stratum, be provided with peripheral support structure, described peripheral support structure by more than 2 along the axial parallel arrangement of shield tunnel and inside built concrete curve supporting pipeline and formed, the two ends of each curve supporting pipeline connect shield duct piece top flat and shield duct piece egative film respectively, vault lining cutting and side wall lining cutting to be all positioned at inside peripheral support structure and with peripheral support anatomical connectivity, brace foundation is located on shield duct piece egative film, base plate to be positioned at above shield duct piece egative film and to be connected with shield duct piece egative film.

2. the subway station of Curve Pipe Jacking supporting and protection structure enlarging shield-tunneling construction according to claim 1, it is characterized in that: described curve supporting pipeline is provided with injected hole, the grouting and reinforcing district sealing that the gap between adjacent two curve supporting pipelines is formed by sealing slurries.

3. the subway station of Curve Pipe Jacking supporting and protection structure enlarging shield-tunneling construction according to claim 1, it is characterized in that: in described curve supporting pipeline, be provided with two freezing pipes be interconnected, two freezing pipes are symmetrically distributed in the two ends of place curve supporting internal diameter of the pipeline and fit with the inwall of place curve supporting pipeline, and the gap between adjacent two curve supporting pipelines is by freezing the consolidation by freezing district sealing formed.

4. the subway station of Curve Pipe Jacking supporting and protection structure enlarging shield-tunneling construction according to claim 1, it is characterized in that: vault lining cutting and side wall lining cutting are formed by the waterproofing course set gradually from outside to inside, template and reinforced concrete structure, and reinforcing bar binding is in template.