Frame type isolation protection system and construction method thereof

Abstract

The invention discloses a frame type isolation protection system and a construction method thereof. The frame type isolation protection system comprises two rows of precast piles, and the two rows of precast piles are vertically arranged on the two sides of an excavated tunnel respectively. Every two of the precast piles in each row are connected through a first cross support, the upper half segments of every two of the precast piles in each column are connected through a second cross support, every two of the precast piles in each column are connected through a tensioning mechanism, and the lower half segments of every two of the precast piles in each column are tensioned. The frame type isolation protection system and the construction method thereof have the beneficial effects that the isolation protection system is formed by the cross supports and the tensioning mechanisms of the precast piles in the two rows and multiple columns to replace a traditional box culvert, the structure is simple, and construction efficiency is high; the stress states of all the parts are reasonable, and disturbance to surrounding buildings is small; and every two precast files are connected through a steel wire rope in the corresponding tensioning mechanism, the position of the steel wire rope between every two precast files is grouted, and soil cross beams are formed at intervals to support the isolation protection system.

Description

technical field [0001] The invention relates to tunnel excavation isolation protection, in particular to a frame type isolation protection system and a construction method thereof. Background technique [0002] The complex surrounding environment is an inevitable external constraint during tunnel excavation and construction, such as bridge piers and buildings near the tunnel. Therefore, the excavation of the tunnel must reduce the disturbance to the surrounding important building soil layers and avoid large deformation. [0003] The existing technology is mainly to reduce the peripheral disturbance by constructing box culverts around the tunnel. For box culverts, diaphragm walls, occlusal piles and other methods that require large earth-moving operations are often used. Although this reduces the impact of tunnel excavation, the large earth-moving operations of box culverts become an additional factor affecting the disturbance of surrounding soil layers. Contents of the in...

AI Technical Summary

Problems solved by technology

However, box culverts often use methods such as diaphragm walls and occlusal piles that require relatively large soil-moving operations. Although this reduces the impact of tunnel excavation, the relatively large soil-moving of box culverts becomes an additional factor affecting the disturbance of surrounding soil layers.

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