Construction Technology and Improvement of
"Coring + Splitting" NonExplosive Method for Hard Rock Water Releasing Tunnel

CHEN Yu

doi:10.3973/j.issn.2096-4498.2023.S1.051

2023 , Vol. 43 >Issue S1: 443 - 450

DOI: https://doi.org/10.3973/j.issn.2096-4498.2023.S1.051

Construction Technology and Improvement of "Coring + Splitting" NonExplosive Method for Hard Rock Water Releasing Tunnel

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(Zhaotong Municipal Transportation Engineering Quality and Safety Supervision Bureau, Zhaotong 657000, Yunnan, China)

Online published: 2023-08-28

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Abstract

To select appropriate nonexplosive construction technologies for small crosssection tunnel in complex hard rocks, the nonexplosive construction technology of peripheral coring and central splitting is adopted and its influence on surrounding environment and construction effect are analyzed. The analytical and test results show the following: (1) The recommended nonexplosive construction technology is applicable to tunneling in relatively favorable hard rock or mediumhard rock (Grades Ⅱ and Ⅲ surrounding rocks). (2) The smallscale construction machinery and tools have disadvantages such as high working intensity, low tunneling efficiency, and poor safety, resulting in low advancing speed of 1 m/d. As a result, largescale drillingsplitting integrated machinery and its construction technology should be developed.

Key words： nonexplosive excavation; water ; releasing tunnel；small crosssection; operation railway tunnel; hard rock; core drilling + splitting; drillingsplitting integrated machinery

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CHEN Yu . Construction Technology and Improvement of "Coring + Splitting" NonExplosive Method for Hard Rock Water Releasing Tunnel[J]. Tunnel Construction, 2023 , 43(S1) : 443 -450 . DOI: 10.3973/j.issn.2096-4498.2023.S1.051

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