Construction method for tunneling excavation through matching of down-the-hole drill and breaking hammer

Abstract

The invention discloses a construction method for tunneling excavation through matching of a down-the-hole drill and a breaking hammer. The construction method comprises the following steps that firstly, peripheral outline holes, slotting holes and breaking holes are formed in a tunnel face through a total station, and marks are made; secondly, the track-type hydraulic down-the-hole drill is utilized for drilling, according to the drilling sequence, the peripheral outline holes are drilled firstly, the slotting holes are formed in middle areas of a lower-middle section of the tunnel face, andthe breaking holes are formed in the rest part of the tunnel face; and thirdly, the breaking hammer is utilized to break the tunnel face from bottom to top in the vertical direction, the area with thedense hole pitch in the lower portion is broken firstly, a free face is dug out, then upward excavation is conducted layer by layer, and breaking is conducted according to the sequence of bottom, top, left, right and periphery. Interference to peripheral buildings is reduced, construction noise is controlled, tunneling of a tunnel body is accelerated, the design goal is achieved, and significantsocial benefits and economic benefits are achieved.

Description

technical field [0001] The invention relates to the field of tunnel construction. More specifically, the present invention relates to a construction method for excavation with a down-the-hole drill combined with a breaking hammer. Background technique [0002] Due to the limitation of surface land area, the development of underground space has received more and more attention. As a typical example of the development and utilization of underground space, urban tunnels have made great contributions to alleviating urban traffic congestion. For urban tunnels surrounded by dense buildings, old houses, shallow tunnel burial depth, good surrounding rock integrity, and high environmental protection requirements, mechanical excavation is generally used for excavation; the current tunnel mechanical excavation method There are the following types: [0003] One is the excavation using conventional crawler-type breakers, that is, according to the tunnel excavation contour line measure...

AI Technical Summary

Problems solved by technology

[0003] One is the excavation using conventional crawler-type breakers, that is, according to the tunnel excavation contour line measured and set out, the crawler-type breakers are used to excavate directly in the surrounding rock of the tunnel face. The advantage of this method is that the construction vibration Small, less impact on surrounding houses, low cost, simple construction organization and process, the disadvantage is that for rock formations with good integrity, "slipping" will occur during the chiseling process, indirectly increasing the excavation time and slowing down the excavation speed, and the noise during the construction process is louder, and more dust is generated, which has a greater impact on the surrounding environmental protection

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