Rapid Drilling of Retaining pile Hole for Deep Pit in Hard Rock

ZHU Zhensheng

doi:10.3973/j.issn.1672-741X.2012.z2.027

Tunnel Construction >

2012 , Vol. 32 >Issue 增刊2: 136 - 140

DOI: https://doi.org/10.3973/j.issn.1672-741X.2012.z2.027

Rapid Drilling of Retaining pile Hole for Deep Pit in Hard Rock

ZHU Zhensheng

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（The 3rd Engineering Company of China Railway Tunnel Group， Shenzhen 518052， Guangdong, China）

Received date: 2012-07-26

Revised date: 2012-09-10

Online published: 2013-02-19

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Abstract

According to the construction experiences of rotatory drill pile for the retaining structure of the pit at Tiyugongyuan station on No. line of Changsha metro, the associated application of rotatory drill and downthehole drill in the construction of retaining structure for deep metro pit is presented in this paper.

Key words： hard rock; retaining structure of deep pit; rotatory drilling pile

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ZHU Zhensheng . Rapid Drilling of Retaining pile Hole for Deep Pit in Hard Rock[J]. Tunnel Construction, 2012 , 32(增刊2) : 136 -140 . DOI: 10.3973/j.issn.1672-741X.2012.z2.027

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