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A platform for research: civil engineering, architecture and urbanism
Lead hole type non-blasting excavation method for rock foundation pit
The invention discloses a lead hole type non-blasting excavation method for a rock foundation pit. The method comprises the following construction steps that 1, lead hole position design is performed,hole positions are arranged in a plum blossom shape, the hole diameter is proper to be 1000 mm to 1200 mm, the hole distance is proper to be 2D to 3D, the lead depth is proper to be 200 mm under a base, and the design of the lead hole can be implemented after the safety is ensured through finite element analysis; 2, surveying and setting out are performed, high-power hole leading machinery is adopted for hole leading construction, and timely backfilling of medium-coarse sand is performed until the medium-coarse sand is dense after each hole leading is completed; 3, an upper soil layer is excavated, an anti-falling safety net is laid at each lead hole position, and a supporting structure is constructed synchronously; and 4, after excavation is conducted to a rock stratum, excavation is conducted through an excavator, a breaking hammer and an air pick. The method is easy to operate, the excavation construction speed of the rock foundation pit can be greatly increased on the premise thatthe safety of the foundation pit is guaranteed, the construction period is shortened, and economic benefits are obvious.
本发明公开了一种岩质基坑引孔式非爆破开挖方法，包括如下施工步骤：步骤1：进行引孔孔位设计，孔位按梅花型布置，孔直径宜取1000mm‑1200mm，孔距在2D‑3D之间，引深至基底下200mm，引孔设计需经有限元分析确保安全后方可实施；步骤2：测量放点，采用大功率引孔机械引孔施工，每引孔完一个及时回填中粗砂至密实；步骤3：开挖上部土层，引孔处铺设防坠安全网，同步施作支护结构；步骤4：开挖至岩层后，采用挖掘机+破碎锤+风镐进行开挖。本发明操作简单，可在确保基坑安全的前提下，大幅提高岩质基坑的开挖施工速度，工期、经济效益明显。
Lead hole type non-blasting excavation method for rock foundation pit
The invention discloses a lead hole type non-blasting excavation method for a rock foundation pit. The method comprises the following construction steps that 1, lead hole position design is performed,hole positions are arranged in a plum blossom shape, the hole diameter is proper to be 1000 mm to 1200 mm, the hole distance is proper to be 2D to 3D, the lead depth is proper to be 200 mm under a base, and the design of the lead hole can be implemented after the safety is ensured through finite element analysis; 2, surveying and setting out are performed, high-power hole leading machinery is adopted for hole leading construction, and timely backfilling of medium-coarse sand is performed until the medium-coarse sand is dense after each hole leading is completed; 3, an upper soil layer is excavated, an anti-falling safety net is laid at each lead hole position, and a supporting structure is constructed synchronously; and 4, after excavation is conducted to a rock stratum, excavation is conducted through an excavator, a breaking hammer and an air pick. The method is easy to operate, the excavation construction speed of the rock foundation pit can be greatly increased on the premise thatthe safety of the foundation pit is guaranteed, the construction period is shortened, and economic benefits are obvious.
本发明公开了一种岩质基坑引孔式非爆破开挖方法，包括如下施工步骤：步骤1：进行引孔孔位设计，孔位按梅花型布置，孔直径宜取1000mm‑1200mm，孔距在2D‑3D之间，引深至基底下200mm，引孔设计需经有限元分析确保安全后方可实施；步骤2：测量放点，采用大功率引孔机械引孔施工，每引孔完一个及时回填中粗砂至密实；步骤3：开挖上部土层，引孔处铺设防坠安全网，同步施作支护结构；步骤4：开挖至岩层后，采用挖掘机+破碎锤+风镐进行开挖。本发明操作简单，可在确保基坑安全的前提下，大幅提高岩质基坑的开挖施工速度，工期、经济效益明显。
Lead hole type non-blasting excavation method for rock foundation pit
一种岩质基坑引孔式非爆破开挖方法
WANG YANBO (author) / LIU KAIYANG (author) / HOU BOHAI (author) / JIANG SHANGZHI (author) / LIU KANGYU (author) / CHEN WEI (author) / ZHOU HAO (author) / LI XIAOKAI (author) / LU WENBO (author) / HU YICHANG (author)
2020-05-08
Patent
Electronic Resource
Chinese
IPC:
E02D
FOUNDATIONS
,
Gründungen
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