预爆破法处理大直径嵌岩桩桩底倾斜岩面问题

在地质构造复杂、不同岩层交叉发育的地区,钻孔桩施工过程中极易遭遇斜岩面,造成钻头出现偏锤现象,从而需要反复修孔才能保证桩基垂直度,严重影响施工工期。针对依托工程中大直径嵌岩桩大倾角高强度斜岩面地质情况,提出了预爆破纠偏的新方法,有效解决了施工困难,提高了施工工效。...

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Bibliographic Details
Published in中国港湾建设 Vol. 37; no. 11; pp. 17 - 20
Main Author 肖伯强;李送根;陈培帅;胡义新
Format Journal Article
LanguageChinese
Published 2017
Subjects
大直径嵌岩桩
斜岩面
预爆破
高强度
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Summary:在地质构造复杂、不同岩层交叉发育的地区,钻孔桩施工过程中极易遭遇斜岩面,造成钻头出现偏锤现象,从而需要反复修孔才能保证桩基垂直度,严重影响施工工期。针对依托工程中大直径嵌岩桩大倾角高强度斜岩面地质情况,提出了预爆破纠偏的新方法,有效解决了施工困难,提高了施工工效。
Bibliography:XIAO Bo-qiang1, LI Song-gen1, CHEN Pei-shuai2, HU Yi-xin1 （1. No.6 Branch CCCC Second Harbour Engineering Co., Ltd., Wuhan, Hubei 430014, China; 2. CCCC Second Harbour Engineering Co., Ltd., Wuhan, Hubei 430040, China ）
12-1310/U
large diameter rock-socketed piles; high strength; inclined rock surface; pre-blasting
In the area of complex geological structure and cross-development of different rock formations, the inclined rock surface is easily encountered during the construction of bored pile, causing the drill hammer partial phenomenon, which requires repeated repair to ensure the vertical degree of the pile foundation, seriously affect the construction period. Based on a project in the large diameter rock-socketed pile inclination of high strength inclined borehole geological situation, we put forward a new method of pre -blasting rectification, which effectively solves the construction difficulties and improves the construction efficiency.
ISSN:2095-7874