Urban underground pipe gallery hard rock mass rope saw cutting excavation method

Abstract

The invention relates to the technical field of urban underground pipe galleries, and discloses an urban underground pipe gallery hard rock mass rope saw cutting excavation method. The urban underground pipe gallery hard rock mass rope saw cutting excavation method comprises the following construction steps: 1) a working well is pre-excavated in a pipe gallery foundation; 2) the pipe gallery foundation is divided into a plurality of working sections, a longitudinal free-face area is arranged between every two adjacent working sections, the depths of the free-face areas are greater than the depth of the pipe gallery foundation; 3) in the working well, the two side surfaces and the bottom surface of one working section are cut by a rope saw according to a rope saw cutting technology, so that a hard rock mass in the working section is separated from a rock parent; and 4) the step 3) is repeated, and the hard rock masses in the multiple working sections are separated from the rock parents. With the adoption of the urban underground pipe gallery hard rock mass rope saw cutting excavation method, a construction process is rapid, the vibration is small, no peripheral buildings are affected, the method is safe and controllable, the cost is moderate, a good working face is provided for construction of the underground pipe galleries in the later stage, and the method has great practical value and popularization significances.

Description

technical field [0001] The invention relates to the technical field of urban underground pipe corridors, in particular to a method for cutting and excavating hard rock masses with wire saws for urban underground pipe corridors. Background technique [0002] At present, in order to meet the needs of urban construction and development, large-scale development of underground pipe corridors is being carried out in major cities. The pipe profile foundation is generally buried in a depth of 4-8m and a width of 4-6m, and is distributed in a narrow and long strip on the plane. [0003] During the construction of underground pipe corridors, the excavation of hard rock formations is often encountered. For the excavation method of hard rock strata, explosive blasting or static blasting is usually used for excavation. Since the construction of the underground pipe gallery is located in a densely populated urban area, it is forbidden to use explosive blasting for construction. Although s...

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Problems solved by technology

[0004] The purpose of the present invention is to provide a wire saw cutting and excavation method for hard rock mass of urban underground pipe gallery, aiming at solving the problem of excavating hard rock mass by explosive blasting or static blasting in the construction process of urban underground pipe gallery in the prior art. There are problems of high noise, difficult construction, high cost and long construction period

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