Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Construction method of bored pile main body steel casing under deepwater foundation and bare rock environment
The invention discloses a construction method of a bored pile main body steel casing under a deepwater foundation and bare rock environment, which comprises the following steps of: when a large-diameter bored pile in a deepwater sea area is constructed, firstly, leveling a seabed by adopting an auxiliary steel casing, then guiding a hole in a hole guiding channel of the auxiliary steel casing, emptying bare rock at the position of a casing wall, hoisting away the auxiliary steel casing, and finally, constructing the large-diameter bored pile in the deepwater sea area. And the main steel casing is placed in the hollowed-out hole, and finally, grouting and built-in are conducted inside and outside the main steel casing of the circular ring hole, so that a built-in layer is formed in the section, and the main steel casing becomes a stable structure. According to the construction method for sinking the bored pile main body steel casing through the auxiliary steel casing, the requirement for the plane precision of a first lead hole is low, a self-stabilizing foundation of the main body steel casing under the bare rock and inclined rock surface environment is provided, and rapid rock entering of the auxiliary steel casing under the bare rock geology is greatly facilitated; the problem of built-in of the main body steel casing in the bare rock geological environment is solved, the risk of offshore construction is reduced, and good economic benefits are generated.
本发明公开了一种深水基础、裸岩环境下钻孔桩主体钢护筒的施工方法，在施工深水海域大直径钻孔桩时，先采用辅助钢护筒将海床整平，然后在辅助钢护筒的引孔通道内进行引孔，将筒壁位置裸岩掏空，再吊离辅助钢护筒，在掏空的孔内下放主体钢护筒，最后在圆环孔的主体钢护筒的内外注浆嵌固，使该段形成嵌固层，主体钢护筒成为稳定结构。本发明中利用辅助钢护筒下沉钻孔桩主体钢护筒的施工方法对首次引孔的平面精度要求较低，提供了裸岩及倾斜岩面环境下主体钢护筒的自稳基础，极大地方便了裸岩地质下辅助钢护筒的快速入岩，解决了裸岩地质环境下主体钢护筒的嵌固问题，降低了海上施工的风险，产生了较好的经济效益。
Construction method of bored pile main body steel casing under deepwater foundation and bare rock environment
The invention discloses a construction method of a bored pile main body steel casing under a deepwater foundation and bare rock environment, which comprises the following steps of: when a large-diameter bored pile in a deepwater sea area is constructed, firstly, leveling a seabed by adopting an auxiliary steel casing, then guiding a hole in a hole guiding channel of the auxiliary steel casing, emptying bare rock at the position of a casing wall, hoisting away the auxiliary steel casing, and finally, constructing the large-diameter bored pile in the deepwater sea area. And the main steel casing is placed in the hollowed-out hole, and finally, grouting and built-in are conducted inside and outside the main steel casing of the circular ring hole, so that a built-in layer is formed in the section, and the main steel casing becomes a stable structure. According to the construction method for sinking the bored pile main body steel casing through the auxiliary steel casing, the requirement for the plane precision of a first lead hole is low, a self-stabilizing foundation of the main body steel casing under the bare rock and inclined rock surface environment is provided, and rapid rock entering of the auxiliary steel casing under the bare rock geology is greatly facilitated; the problem of built-in of the main body steel casing in the bare rock geological environment is solved, the risk of offshore construction is reduced, and good economic benefits are generated.
本发明公开了一种深水基础、裸岩环境下钻孔桩主体钢护筒的施工方法，在施工深水海域大直径钻孔桩时，先采用辅助钢护筒将海床整平，然后在辅助钢护筒的引孔通道内进行引孔，将筒壁位置裸岩掏空，再吊离辅助钢护筒，在掏空的孔内下放主体钢护筒，最后在圆环孔的主体钢护筒的内外注浆嵌固，使该段形成嵌固层，主体钢护筒成为稳定结构。本发明中利用辅助钢护筒下沉钻孔桩主体钢护筒的施工方法对首次引孔的平面精度要求较低，提供了裸岩及倾斜岩面环境下主体钢护筒的自稳基础，极大地方便了裸岩地质下辅助钢护筒的快速入岩，解决了裸岩地质环境下主体钢护筒的嵌固问题，降低了海上施工的风险，产生了较好的经济效益。
Construction method of bored pile main body steel casing under deepwater foundation and bare rock environment
一种深水基础、裸岩环境下钻孔桩主体钢护筒的施工方法
JIAO XIAOJUN (Autor:in) / PENG PO (Autor:in) / LI HONGRUI (Autor:in) / XU BOZONG (Autor:in) / YE SHAOQI (Autor:in)
22.03.2022
Patent
Elektronische Ressource
Chinesisch
IPC:
E02D
FOUNDATIONS
,
Gründungen
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