Steel anchor pipe reinforced weathered rock stratum reinforced balance weight type retaining wall structure and construction method

Abstract

The invention discloses a steel anchor pipe reinforced weathered rock stratum reinforced balance weight type retaining wall structure and a construction method, the weathered rock stratum is reinforced by the steel anchor pipes through grouting inside and outside the pipes, the bearing capacity of a treated rock mass foundation is greatly improved, and the foundation bearing requirement of an upper embankment retaining structure is completely met. Meanwhile, the stability of the treated weathered rock stratum is improved, the steel anchor pipe can also serve as a side slope anti-sliding structure, and the effect of preventing sliding and reducing disasters on an original weathered rock stratum side slope is achieved. According to the reinforced soil (balanced weight type) retaining wall, breakthrough of the wall thickness size of a traditional retaining wall is achieved, and meanwhile laying of the geogrid has great significance for the stability of the retaining wall. The constructionmethod is mature in technology and reasonable in procedure, has the advantage of rapid construction and has outstanding economic benefits. The method has a wide prospect in application of road embankment filling and retaining structures on weathered rock stratum geology.

Description

technical field [0001] The invention relates to the field of road filling slopes and supports, in particular to a structure and a construction method of a joist foundation reinforced balance weight type retaining wall on a weathered rock layer foundation reinforced by a steel anchor pipe. Background technique [0002] In recent years, traffic engineering has developed rapidly, especially the construction scale of expressways in mountainous areas is increasing day by day. While the construction of expressways in mountainous areas plays an important role in promoting local economic development and facilitating the travel of the people, several key technologies related to road traffic construction in mountainous areas The problems kept popping up. Among them, the slope stability and retaining structure of the highway embankment formed on the fully weathered and strongly weathered rock formations is an important design and construction problem that needs to be solved urgently. ...

AI Technical Summary

Problems solved by technology

At present, the most direct way is to pass the pile foundation through the weathered rock layer and the pile end is located on the bearing layer to realize the load bearing of the upper embankment body and the retaining structure. However, the traditional concrete pile foundation generally has a large pile length, and the construction of the pile foundation During the excavation of pile holes in the process, due to the weathered rock formation conditions, there are technical difficulties in effective support and safe excavation. In addition, the long drilling construction period is not conducive to construction cost control

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