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A platform for research: civil engineering, architecture and urbanism
Sand gushing prevention steel casing for drilling secant pile
The invention discloses a sand gushing prevention steel casing for a drilling secant pile. Belongs to the technical field of house building and municipal construction. The problem that due to the fact that the difference between the height of a water head in a hole and the height of a water head inside and outside an existing steel protection cylinder is large, silt and fine sand inrush into the protection cylinder under the effect of underground water is mainly solved. The device is mainly characterized by comprising an inner steel casing and an outer steel casing, wherein the inner steel casing is sleeved with the outer steel casing; an inner steel casing lower port opening and closing mechanism is arranged at the bottoms of the inner steel casing and the outer steel casing; and a clutch mechanism is arranged between the inner steel casing and the outer steel casing. The device has the advantages of being simple in structure, convenient to operate, capable of isolating a soil body in the sleeve from the outside and capable of completely avoiding the sand gushing phenomenon, and is mainly used for secant pile soil body construction penetrating through a soft silt layer or a silty-fine sand layer.
本发明的名称一种钻孔咬合桩防涌砂钢护筒。属于房建及市政施工技术领域。它主要是解决现有钢护筒因孔内水头高度与护筒内外水头高度相差较大而导致粉土粉细砂在地下水作用下涌入护筒内的问题。它的主要特征是：包括内钢护筒及套在内钢护筒外面的外钢护筒；所述内钢护筒和外钢护筒的底部设有内钢护筒下端口开闭机构；所述内钢护筒与外钢护筒之间设有离合机构。本发明具有结构简单、操作方便、可隔绝套管内土体与外界联系和可完全避免产生涌砂现象的特点，主要用于下穿松软淤泥层或粉细砂层的咬合桩土体施工。
Sand gushing prevention steel casing for drilling secant pile
The invention discloses a sand gushing prevention steel casing for a drilling secant pile. Belongs to the technical field of house building and municipal construction. The problem that due to the fact that the difference between the height of a water head in a hole and the height of a water head inside and outside an existing steel protection cylinder is large, silt and fine sand inrush into the protection cylinder under the effect of underground water is mainly solved. The device is mainly characterized by comprising an inner steel casing and an outer steel casing, wherein the inner steel casing is sleeved with the outer steel casing; an inner steel casing lower port opening and closing mechanism is arranged at the bottoms of the inner steel casing and the outer steel casing; and a clutch mechanism is arranged between the inner steel casing and the outer steel casing. The device has the advantages of being simple in structure, convenient to operate, capable of isolating a soil body in the sleeve from the outside and capable of completely avoiding the sand gushing phenomenon, and is mainly used for secant pile soil body construction penetrating through a soft silt layer or a silty-fine sand layer.
本发明的名称一种钻孔咬合桩防涌砂钢护筒。属于房建及市政施工技术领域。它主要是解决现有钢护筒因孔内水头高度与护筒内外水头高度相差较大而导致粉土粉细砂在地下水作用下涌入护筒内的问题。它的主要特征是：包括内钢护筒及套在内钢护筒外面的外钢护筒；所述内钢护筒和外钢护筒的底部设有内钢护筒下端口开闭机构；所述内钢护筒与外钢护筒之间设有离合机构。本发明具有结构简单、操作方便、可隔绝套管内土体与外界联系和可完全避免产生涌砂现象的特点，主要用于下穿松软淤泥层或粉细砂层的咬合桩土体施工。
Sand gushing prevention steel casing for drilling secant pile
一种钻孔咬合桩防涌砂钢护筒
ZHOU HUI (author) / LI CHUNFEI (author) / WANG DONG (author) / LI ZHOUQIANG (author) / WEI ZHONGQUAN (author) / YAN KANG (author)
2024-01-30
Patent
Electronic Resource
Chinese
IPC:
E02D
FOUNDATIONS
,
Gründungen
Novel all-casing long auger drilling deslagging pouring secant pile construction technology
| European Patent Office | 2024