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A platform for research: civil engineering, architecture and urbanism
Construction method for positioning bearing platform under weakly weathered rock stratum riverbed
The invention relates to a bridge bearing platform construction technology, in particular to a construction method for positioning a bearing platform under a weakly weathered rock stratum riverbed. The technical problems that an existing construction scheme of a bearing platform located on a weak weathered rock stratum riverbed is not suitable for flood season operation, and water pollution is easily caused by blasting operation are solved. According to the construction method, SP-IV type Larsen steel sheet piles, steel pipe columns with D = 630 mm and double-spliced I56 I-shaped steel enclosing purlins are adopted for protecting a foundation pit, and then bearing platform construction is started. Island building and filling are conducted on construction areas of 5 # and 6 # piers of the ball stream river, after leveling is conducted, drilling piles are constructed through a rotary drilling rig, after construction is completed, the rotary drilling rig is adopted to conduct hole guiding on the steel sheet pile inserting area, Larsen steel sheet piles are inserted into the steel sheet pile inserting area after hole guiding, and rock mass is loosened through the rotary drilling rig in the bearing platform construction area while inserting and driving are conducted; and after the loose piles are constructed, the Larsen steel sheet pile cofferdam is closed, and a foundation pit is excavated.
本发明涉及桥梁承台施工技术，具体为一种承台位于弱风化岩层河床下施工方法。解决了现有的位于弱风化岩层河床的承台的施工方案不适用于汛期作业，采用爆破作业容易造成水体污染的技术问题。本工法采用SP‑Ⅳ型拉森钢板桩及D=630mm的钢管柱+双拼I56工字钢围檩对基坑进行防护后开始承台施工。球溪河5#、6#墩处施工区域进行筑岛填筑，整平后旋挖钻机对钻孔桩施工，完成后采用旋挖钻机对钢板桩插打区域引孔，引孔后插打入拉森钢板桩，边插打边对承台施工区域采用旋挖钻机对岩体进行松动处理，待松动桩施工完毕后将拉森钢板桩围堰合拢，开挖基坑。
Construction method for positioning bearing platform under weakly weathered rock stratum riverbed
The invention relates to a bridge bearing platform construction technology, in particular to a construction method for positioning a bearing platform under a weakly weathered rock stratum riverbed. The technical problems that an existing construction scheme of a bearing platform located on a weak weathered rock stratum riverbed is not suitable for flood season operation, and water pollution is easily caused by blasting operation are solved. According to the construction method, SP-IV type Larsen steel sheet piles, steel pipe columns with D = 630 mm and double-spliced I56 I-shaped steel enclosing purlins are adopted for protecting a foundation pit, and then bearing platform construction is started. Island building and filling are conducted on construction areas of 5 # and 6 # piers of the ball stream river, after leveling is conducted, drilling piles are constructed through a rotary drilling rig, after construction is completed, the rotary drilling rig is adopted to conduct hole guiding on the steel sheet pile inserting area, Larsen steel sheet piles are inserted into the steel sheet pile inserting area after hole guiding, and rock mass is loosened through the rotary drilling rig in the bearing platform construction area while inserting and driving are conducted; and after the loose piles are constructed, the Larsen steel sheet pile cofferdam is closed, and a foundation pit is excavated.
本发明涉及桥梁承台施工技术，具体为一种承台位于弱风化岩层河床下施工方法。解决了现有的位于弱风化岩层河床的承台的施工方案不适用于汛期作业，采用爆破作业容易造成水体污染的技术问题。本工法采用SP‑Ⅳ型拉森钢板桩及D=630mm的钢管柱+双拼I56工字钢围檩对基坑进行防护后开始承台施工。球溪河5#、6#墩处施工区域进行筑岛填筑，整平后旋挖钻机对钻孔桩施工，完成后采用旋挖钻机对钢板桩插打区域引孔，引孔后插打入拉森钢板桩，边插打边对承台施工区域采用旋挖钻机对岩体进行松动处理，待松动桩施工完毕后将拉森钢板桩围堰合拢，开挖基坑。
Construction method for positioning bearing platform under weakly weathered rock stratum riverbed
承台位于弱风化岩层河床下施工方法
ZHAI ZHIWEI (author) / WANG HAIJUN (author) / LIU MING (author) / JING XIAPING (author) / YANG XU (author) / CHANG LONG (author) / WANG ZHIWEI (author) / JIA YAN (author) / YANG XINCHI (author) / MA JIANXUN (author)
2022-09-06
Patent
Electronic Resource
Chinese
IPC:
E02D
FOUNDATIONS
,
Gründungen
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