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A platform for research: civil engineering, architecture and urbanism
Underwater high-pressure jet grouting water stop construction method for rock-socketed cofferdam
The invention discloses a rock-socketed cofferdam underwater high-pressure jet grouting water stop construction method which comprises the following steps: firstly, inserting and driving a large-diameter steel casing, drilling a hole to a cofferdam bottom opening by a rotary drill, pouring sand for filling, pulling out the large-diameter steel casing, and then inserting and driving a small-diameter locking steel pipe pile, so that the rock-socketed cofferdam underwater high-pressure jet grouting water stop construction method is realized. Then the outer sides of the fore shaft steel pipe piles are solidified through high-pressure rotary jet grouting, in this way, the grout can further enhance the water stop performance of the sand body, the grout and the fore shaft steel pipe piles are fused to form a strong water stop curtain, and the bearing capacity and the water stop effect of the cofferdam foundation are effectively improved; the problem that the effect of traditional underwater concrete bottom sealing and water stopping is difficult to guarantee is avoided, expensive concrete is not needed, and large construction cost is saved.
本发明公开了一种嵌岩围堰水下高压旋喷注浆止水施工方法，该施工方法通过先插打大直径的钢护筒，旋挖钻钻孔至围堰底口并灌注砂子填充，拔除大直径的钢护筒后再插打小直径的锁口钢管桩，再对锁口钢管桩外侧通过高压旋喷注浆固化，这样能够使浆液进一步增强砂体止水性能，两者交融形成较强的止水帷幕，有效提高围堰基础承载力及止水效果；既避免传统水下混凝土封底止水难以保证效果，又无需造价昂贵的混凝土，节约了比较大的施工成本。
Underwater high-pressure jet grouting water stop construction method for rock-socketed cofferdam
The invention discloses a rock-socketed cofferdam underwater high-pressure jet grouting water stop construction method which comprises the following steps: firstly, inserting and driving a large-diameter steel casing, drilling a hole to a cofferdam bottom opening by a rotary drill, pouring sand for filling, pulling out the large-diameter steel casing, and then inserting and driving a small-diameter locking steel pipe pile, so that the rock-socketed cofferdam underwater high-pressure jet grouting water stop construction method is realized. Then the outer sides of the fore shaft steel pipe piles are solidified through high-pressure rotary jet grouting, in this way, the grout can further enhance the water stop performance of the sand body, the grout and the fore shaft steel pipe piles are fused to form a strong water stop curtain, and the bearing capacity and the water stop effect of the cofferdam foundation are effectively improved; the problem that the effect of traditional underwater concrete bottom sealing and water stopping is difficult to guarantee is avoided, expensive concrete is not needed, and large construction cost is saved.
本发明公开了一种嵌岩围堰水下高压旋喷注浆止水施工方法，该施工方法通过先插打大直径的钢护筒，旋挖钻钻孔至围堰底口并灌注砂子填充，拔除大直径的钢护筒后再插打小直径的锁口钢管桩，再对锁口钢管桩外侧通过高压旋喷注浆固化，这样能够使浆液进一步增强砂体止水性能，两者交融形成较强的止水帷幕，有效提高围堰基础承载力及止水效果；既避免传统水下混凝土封底止水难以保证效果，又无需造价昂贵的混凝土，节约了比较大的施工成本。
Underwater high-pressure jet grouting water stop construction method for rock-socketed cofferdam
一种嵌岩围堰水下高压旋喷注浆止水施工方法
LI JIANG (author) / LIU TAO (author) / ZHONG ZHENYUN (author) / WEN YAPING (author) / WAN MING (author) / BIE SHIYONG (author) / YU PEICHI (author) / RENI (author) / CHEN XIANGYI (author) / YE SHAOQI (author)
2024-04-05
Patent
Electronic Resource
Chinese
IPC:
E02D
FOUNDATIONS
,
Gründungen
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