Underground supporting structure for reverse construction method and construction method

Abstract

The invention belongs to the technical field of underground constructional engineering, and particularly relates to an underground supporting structure for a reverse construction method. An underground supporting system is an underground structural beam, a shear wall and the wall of a well and comprises first vertical structure supporting system sections and second vertical structure supporting system sections, and the first vertical structure supporting system sections and the second vertical structure supporting system sections are connected in sequence; each first vertical structure supporting system section comprises a first-section vertical body and a first-section horizontal structure body which is arranged on an auxiliary rigid structure system; the first vertical structure supporting system sections and the second vertical structure supporting system sections are internally provided with suspension-pulling steel cables; the ends, penetrating through the first vertical structure supporting system sections and the second vertical structure supporting system sections, of the suspension-pulling steel cables are fixedly connected with a bottom formwork; and the other opposite ends of the suspension-pulling steel cables are provided with steel cable locking devices. By means of the underground supporting structure for the reverse construction method, the structure safety is ensured, the construction efficiency is improved, and the construction progress is accelerated. The invention further discloses a construction method of the underground supporting structure for the reverse construction method.

Description

technical field [0001] The invention relates to an underground support structure and a construction method constructed by a reverse method, and belongs to the field of underground construction engineering. Background technique [0002] With the acceleration of economic growth and urbanization, the available aboveground space in cities is becoming less and less, and the contradiction between urban development and land resource shortage becomes more prominent. The existing use space of existing buildings is insufficient, and it is necessary to rationally develop and utilize the underground space of existing buildings. In the construction of underground engineering, the open and cut method is generally used for construction. Although the open-cut method has the advantages of simple construction, low direct project cost, and high controllability of the construction process, there are still significant shortcomings: First, the open-cut method has relatively high protection costs...

AI Technical Summary

Problems solved by technology

Although the open-cut method has the advantages of simple construction, low direct project cost, and high controllability of the construction process, there are still significant shortcomings: First, the open-cut method has relatively high protection costs for existing facilities and a relatively long construction period

[0003] At present, most of the excavation of foundation pits in underground engineering that are widely used are in-line method, which is excavated layer by layer and supported layer by layer. It is usually suitable for shallow foundation pit excavation. For deep foundation pits, this method has a longer construction period. Long, technical reliability is not strong, the technology is obviously backward and other shortcomings

Upside-down construction is the most economical and technically reliable method for underground space development. Since some minor technical problems in upside-down construction have not been resolved, the advantages of upside-down construction are not obvious. Therefore, in view of the problems existing in upside-down construction, how to It is an urgent technical problem for those skilled in the art to provide a safe, efficient, and low-cost support structure for underground space reverse construction.

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