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A platform for research: civil engineering, architecture and urbanism
Construction method for double-wall steel cofferdam without bottom sealing concrete in deepwater bare rock geology
The invention discloses a construction method for a double-wall steel cofferdam without bottom sealing concrete in deepwater bare rock geology. The construction method comprises the following steps that the prefabricated steel cofferdam is transported to a bridge pier position; in the water flow direction, the end, close to the upstream, of the steel cofferdam is fixed by a winch through a steel wire rope, the end, close to the downstream, of the steel cofferdam is fixed through a positioning tail anchor and a positioning ground anchor, the two side faces of the steel cofferdam are pushed in an ejecting mode through a tugboat for comprehensive positioning; a positioning groove is excavated in the position, below the steel cofferdam, of the bridge pier position in advance, and then the steel cofferdam sinks to the designed elevation, positioning groove concrete is poured, and the positioning groove concrete and an impervious layer jointly form a water-resisting layer so as to stop and isolate water. The steel cofferdam is positioned through grooving, large-range blasting does not need to be conducted, bottom sealing concrete with large thickness is not poured, excavation of a riverbed is reduced, the influence on the surrounding environment is reduced to the maximum degree, and the requirement for environmental protection is met.
本发明公开了一种用于深水裸岩地质无封底混凝土双壁钢围堰的施工方法，包括：将预制好的钢围堰运至桥梁墩位处；沿着水流的方向，所述钢围堰靠近上游的一端被卷扬机用钢丝绳固定，所述钢围堰靠近下游的一端利用定位尾锚和定位地锚固定，所述钢围堰的两个侧面通过拖船顶推，进行综合定位；在桥梁墩位处位于钢围堰下方的位置预先开挖有定位槽；再将钢围堰下沉至设计标高，浇筑定位槽混凝土，定位槽混凝土和所述不透水层共同形成隔水层，以止水隔水。钢围堰通过开槽定位，不需要进行大范围爆破，并且不浇筑厚度较大的封底混凝土，减少了对河床的开挖，最大程度的减低了对周围环境的影响，符合环保要求。
Construction method for double-wall steel cofferdam without bottom sealing concrete in deepwater bare rock geology
The invention discloses a construction method for a double-wall steel cofferdam without bottom sealing concrete in deepwater bare rock geology. The construction method comprises the following steps that the prefabricated steel cofferdam is transported to a bridge pier position; in the water flow direction, the end, close to the upstream, of the steel cofferdam is fixed by a winch through a steel wire rope, the end, close to the downstream, of the steel cofferdam is fixed through a positioning tail anchor and a positioning ground anchor, the two side faces of the steel cofferdam are pushed in an ejecting mode through a tugboat for comprehensive positioning; a positioning groove is excavated in the position, below the steel cofferdam, of the bridge pier position in advance, and then the steel cofferdam sinks to the designed elevation, positioning groove concrete is poured, and the positioning groove concrete and an impervious layer jointly form a water-resisting layer so as to stop and isolate water. The steel cofferdam is positioned through grooving, large-range blasting does not need to be conducted, bottom sealing concrete with large thickness is not poured, excavation of a riverbed is reduced, the influence on the surrounding environment is reduced to the maximum degree, and the requirement for environmental protection is met.
本发明公开了一种用于深水裸岩地质无封底混凝土双壁钢围堰的施工方法，包括：将预制好的钢围堰运至桥梁墩位处；沿着水流的方向，所述钢围堰靠近上游的一端被卷扬机用钢丝绳固定，所述钢围堰靠近下游的一端利用定位尾锚和定位地锚固定，所述钢围堰的两个侧面通过拖船顶推，进行综合定位；在桥梁墩位处位于钢围堰下方的位置预先开挖有定位槽；再将钢围堰下沉至设计标高，浇筑定位槽混凝土，定位槽混凝土和所述不透水层共同形成隔水层，以止水隔水。钢围堰通过开槽定位，不需要进行大范围爆破，并且不浇筑厚度较大的封底混凝土，减少了对河床的开挖，最大程度的减低了对周围环境的影响，符合环保要求。
Construction method for double-wall steel cofferdam without bottom sealing concrete in deepwater bare rock geology
用于深水裸岩地质无封底混凝土双壁钢围堰的施工方法
FU SU (author) / ZENG JIAN (author) / XU ANQI (author) / WANG WENLONG (author) / DENG SONGTAO (author) / HE WENTAO (author) / CHENG TAO (author) / YU YANQIU (author) / HUANG FENGDA (author)
2021-11-02
Patent
Electronic Resource
Chinese
IPC:
E02D
FOUNDATIONS
,
Gründungen
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