Long and narrow underground structure suitable for strong earthquake action and construction method thereof

Abstract

The invention discloses a long and narrow underground structure suitable for strong earthquake action and a construction method thereof. A matrix energy consumption layer is arranged between side walls of the underground structure and an enclosure structure; the matrix energy consumption layer comprises a plurality of steel springs; the plurality of steel springs are arranged in an array mode, and the plurality of steel springs are filled with cement soil; during construction, firstly, the enclosure structure is constructed, and spring embedded parts are arranged on the enclosure structure; secondly, and during side wall construction, corresponding spring embedded parts are arranged on the soil facing sides of the side walls; after the side walls reach the design strength, the steel springs are mounted one by one; thirdly, cement soil is filled between the side walls and the enclosure structure to the top surface of a top plate of the underground structure; and finally, the top plate is covered with soil and backfilled to the designed ground elevation. The application of the method can obviously improve the adaptive capacity of the long and narrow underground structure under the strong earthquake action, and has the characteristics of convenience in construction and low manufacturing cost.

Description

technical field [0001] The invention relates to the technical field of seismic resistance of underground structures, in particular to a long and narrow underground structure adaptable to strong earthquakes and a construction method thereof. Background technique [0002] For a long time, it has been generally believed that long and narrow underground structures completely buried in the soil, such as subway stations, urban underground road tunnels, and underground comprehensive pipe corridors, are subject to earthquakes due to the constraints of the foundation soil and the simple and regular structural system. less harmful. However, the existing earthquake damage shows that this type of structure is not safe when a strong earthquake disaster occurs. For example, the Great Hanshin Earthquake in Japan in 1995 caused the most serious damage in history to the subways, underground businesses, and tunnels in Kobe City. [0003] In the existing technology, some explorations have be...

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Problems solved by technology

However, this does not solve the seismic problem of the main structure. When the main structure is severely damaged in the face of a strong earthquake, the above-mentioned internal components will inevitably be destroyed.

The second is to wrap a thick shock-isolation layer composed of foam resin and other buffering and damping media around the periphery of the underground structure, but the corresponding construction cost is high, and the above-mentioned materials are prone to creep compression under long-term continuous loads, and the structural bottom plate The compression deformation of the seismic isolation layer below and above the roof will cause differential settlement damage of the station, cracking damage of the ground road, etc., so it is difficult to popularize and apply

However, this method not only significantly increases the engineering investment, but also, engineering practice shows that blindly increasing the structural stiffness without considering enough energy-dissipating components is more likely to damage

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