Construction method for a tunnel with any cross section in a hard rock stratum

A tunnel construction and formation technology, applied in tunnels, earthwork drilling, mining equipment, etc., can solve the problems of increased probability of abnormal damage, complex structure of the whole machine, and inconspicuous effects, and achieve flexible transition, small size of equipment, and easy construction Effect of Difficulty Reduction
CN113446024AInactive Publication Date: 2021-09-28CHINA RAILWAY ENGINEERING EQUIPMENT GROUP CO LTD
2 Cites 0 Cited by

Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
CHINA RAILWAY ENGINEERING EQUIPMENT GROUP CO LTD
Publication Date
2021-09-28
Estimated Expiration
Not applicable · inactive patent

Smart Images

  • Figure 1
    Figure 1
  • Figure 2
    Figure 2
  • Figure 3
    Figure 3
Patent Text Reader

Abstract

The invention provides a construction method for a tunnel with any cross section in a hard rock stratum. The construction method comprises the following steps that 1, the position of a vertical groove (1) and the positions of a plurality of expansion cracking holes (2) are calibrated on a tunnel face (3) of the tunnel; 2, the vertical groove (1) is dug in the tunnel face (3) according to the calibrated position of the vertical groove (1), and the expansion crack holes (2) are drilled in the tunnel face (3) according to the calibrated positions of the expansion crack holes (2); and 3, expansion cracking operation is carried out on the expansion cracking holes (2), so that the rock between the vertical groove (1) and the expansion cracking holes (2) is separated from the tunnel face (3). According to the construction method for the tunnel with the any section in the hard rock stratum, vertical groove digging and hydraulic hole expansion are combined, meanwhile, slag discharging operation is conducted through an excavator and a slag conveying vehicle, the free face formed by the vertical groove is larger and larger, finally, the free face is communicated to form the tunnel section, excavation of the tunnel on the layer is completed, and the purpose of excavating the whole tunnel can be achieved through repeated operation; and the tunnel construction efficiency is greatly improved.
Need to check novelty before this filing date? Find Prior Art

Description

technical field

[0001] The invention relates to the field of tunnel excavation construction, in particular to a construction method for tunnels with arbitrary sections in hard rock formations. Background technique

[0002] In recent years, the construction scale of basic projects such as road traffic, water conservancy and hydropower has increased year by year, and tunnel excavation methods and equipment have received more and more attention. Traditional construction methods have been unable to meet the needs of modern tunnel construction, especially for rocks with extreme strength. In high hard rock formations, relying solely on metal tools for excavation not only slows down construction efficiency, but also increases construction costs due to abnormal wear of tools.

[0003] The traditional drilling and blasting method is suitable for a wide range of geology, but the construction efficiency is slow, the construction personnel work hard, the working environment is harsh, ca...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More