Pile plate type ear wall type open cut tunnel structure

Abstract

The invention discloses a pile plate type ear wall type open cut tunnel structure. The pile plate type ear wall type open cut tunnel structure aims to effectively improve the integrity of an open cuttunnel structure, reduce the risk of differential settlement and reduce the size and the dead weight of an ear wall structure, so that the construction cost is saved. The pile plate type ear wall typeopen cut tunnel structure is characterized in that each ear wall column is divided into a lower ear wall column section and an upper ear wall column section, bottom plates for transversely connectingeach ear wall column into a whole are arranged at the lower ends of the lower ear wall column sections, cross beams for transversely connecting each ear wall column into a whole are arranged at the lower ends of the upper ear wall column sections, and the bottom plates, the cross beams and each ear wall column form a reinforced concrete frame structure; precast concrete slabs are arranged at thesoil retaining side of each upper ear wall column in the upper space of the ear wall structure above the cross beams to form a pile plate wall structure used for bearing lateral backfill soil pressure; and in the lower space of the ear wall structure from the cross beams to the bottom plates, the lower ear wall columns and the side wall section of a lining structure are fixedly connected into a whole to form a pile plate wall structure used for bearing acting force such as lateral soil pressure, structural dead weight, and seismic force of the open cut tunnel structure.

Description

technical field [0001] The invention relates to the main structure of tunnel engineering, in particular to a pile plate type ear wall type open hole structure. Background technique [0002] In the engineering design of tunnels in mountainous areas, according to factors such as the topography and geology of the entrance, ear-wall open hole structures are often used, including single-pressure open holes and double-ear open holes. [0003] The main body of the ear wall type open hole structure is composed of two parts: the ear wall and the lining structure. There are ear walls on one or both sides of the lining structure. The top of the open hole is backfilled with earth and rocks and a water-resistant layer is set up to buffer against collapsed blocks and falling rocks. Features. [0004] The existing ear wall-type open hole lining, the ear wall and the lining structure are poured separately, the ear wall is based on the gravity retaining wall design, the structural size and ...

AI Technical Summary

Problems solved by technology

[0004] The existing ear wall-type open hole lining, the ear wall and the lining structure are poured separately, the ear wall is based on the gravity retaining wall design, the structural size and the amount of concrete are large, resulting in poor integrity of the open hole structure and a large difference in stiffness. High requirements for foundation bearing capacity, prone to uneven settlement, high civil construction costs and high operational risks

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