Construction method of underpass under expressway

Abstract

The invention discloses a construction method of an underpass channel under an expressway, which comprises the following steps of: adopting foundation pit support piles on a medial strip of the expressway, then adopting high-pressure jet grouting piles to reinforce soil bodies among the piles to form a waterproof curtain, then constructing by using pre-stressed anchor cables, and using a pass-keeping expressway road width as an anchor cable construction soil body to reinforce a foundation pit support structure. High-speed half-range construction, half-range communication keeping and deep foundation pit operation are achieved, high cost for increasing the occupied area of a temporary communication keeping channel due to road changing is avoided, land acquisition and reclamation cost is effectively reduced, and the construction period is guaranteed. According to the construction method, the problems of high cost and long construction period due to the fact that a traffic-keeping channel needs to be built in a traditional construction process of an underpass channel of an underpass expressway are solved.

Description

technical field [0001] The invention relates to the technical field of building construction, in particular to a construction method of an underpass under a highway. Background technique [0002] With the acceleration of urban construction, the underpass project has become the first choice for urban interchanges. Especially in the construction of the underpass under the expressway, the traditional construction technology is to interrupt the expressway and build a temporary access road. On the one hand, it increases the high cost of land acquisition and reclamation. , The construction period for the construction of the access road is long, which affects the construction period. [0003] The information disclosed in this Background section is only for enhancement of understanding of the general background of the invention and should not be taken as an acknowledgement or any form of suggestion that this information forms the prior art already known to a person of ordinary skil...

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Problems solved by technology

[0004] In order to overcome the defects existing in the existing technology, a construction method for the underpass under the expressway is now provided to solve the problem that the traditional construction technology of the underpass under the expressway requires the construction of a pass-through passage, which is not only costly but also has a long construction period. long question

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