Open-cut tunnel structure to prevent uneven deformation of foundation in soft soil subsidence
A technology of open-cut tunneling and uniform deformation, which is used in infrastructure engineering, underwater structures, water conservancy projects, etc. The effect of uneven settlement of the structure
Active Publication Date: 2018-04-20
CHINA RAILWAY SIYUAN SURVEY & DESIGN GRP
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Problems solved by technology
[0004] 1. When the soft soil is deep and widely distributed, the amount of reinforcement work for ground improvement is large and uneconomical
[0005] 2. When the pile foundation support structure is adopted, the length and quantity of piles required are large, resulting in a substantial increase in project investment
Method used
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Embodiment
[0024] Example: such as Figure 1 to Figure 8 The shown open-cut tunnel structure for preventing uneven deformation of the foundation by subsidence of soft soil includes an open-cut tunnel composed of a top plate 5, a bottom plate 3 and a side wall 4, and a backfill covering soil 7 is laid above the top plate 5, An enclosure structure 6 is provided on the outer side of the side wall 4 . A plurality of pre-compressed layers 1 spliced in sequence along the horizontal direction are arranged between the bottom plate 3 and the soft soil subsidence formation 2 below. And the pressure plate 8 on the bottom surface and the fasteners for pressing the pressure plate 8 and the elastic pad 11, the elastic pad 11 is made of polystyrene material. The pressing board 8 is a plastic board or a wooden board.
[0025] The fasteners pre-compress the elastic pad 11 through the upper and lower pressure plates 8, and the fasteners are metal wires that can be corroded and broken under the action ...
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The invention discloses an open trench tunnel structure capable of preventing inhomogeneous deformation of a foundation for a soft soil seismic subsidence stratum. The open trench tunnel structure comprises an open trench tunnel composed of a top plate, a bottom plate and side walls, backfill soil is paved on the top plate, and enclosure structures are arranged on the outer sides of the side walls. The open trench tunnel structure is characterized in that pre-compression layers are arranged between the bottom plate and the soft soil seismic subsidence stratum below the bottom plate and comprise elastic cushions, pressing plates closely attached to the top surfaces and the bottom surfaces of the elastic cushions and fasteners used for pressing the pressing plates and the elastic cushions, and the fasteners pre-compress the elastic cushions through the two pressing plates in the vertical direction and are metal wires capable of being corroded and broken under the effect of underground water. The open trench tunnel structure has the beneficial effects of being capable of adapting to different seismic subsidence deflection at different parts of the bottom of the tunnel, capable of effectively preventing local cavities, simple in structure and easy and convenient to construct.
Description
technical field [0001] The invention relates to the field of open-cut tunnels, in particular to an open-cut tunnel structure for preventing non-uniform deformation of foundations by subsidence of soft soil. Background technique [0002] Seismic subsidence of soft soil is a phenomenon of subsidence of the soft soil itself and the ground during an earthquake. When the subsidence of the basement of an open-cut tunnel occurs, it will cause the subsidence of the basement stratum and the structure will also subside accordingly. However, due to the different seismic subsidence deformation at different parts of the tunnel bottom, the tunnel structure will produce uneven settlement, and even cause local voids between the structure and the underlying stratum. The additional internal force will cause the structure to crack or even be destroyed. Therefore, measures need to be taken to eliminate this disaster phenomenon in the project. [0003] There are two main measures currently bei...
Claims
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IPC IPC(8): E02D29/05E02D27/34
CPCE02D27/34E02D29/05
Inventor 肖明清邓朝辉龙凡薛光桥何应道石湛
Owner CHINA RAILWAY SIYUAN SURVEY & DESIGN GRP