A platform for research: civil engineering, architecture and urbanism
A platform for research: civil engineering, architecture and urbanism
Anti-hole-collapse construction method for rotary excavating pile
The invention relates to an anti-hole-collapse construction method for a rotary excavating pile. The method comprises the following steps that survey and setting out of a pile position are carried out; a first section of pile casing is vertically inserted below a foundation layer from the center of the pile position; a next section of pile casing is vertically inserted below the foundation layer from the center of the pile position, the outer diameter of the section of pile casing is smaller than the diameter of the previous section of pile casing, and the length of the section of pile casingis larger than that of the previous section of pile casing; in the same way, the steps are repeated until the bottom end of an innermost-layer pile casing reaches the required depth of a pile hole; downward drilling is carried out with the axis of the innermost-layer pile casing as the center, and the pile hole is formed; a reinforcement cage is lowered into the pile hole; concrete is poured intothe pile hole for the first time, when the liquid level of the concrete just exceeds the height close to the bottom end face of the pile casing, pouring is stopped, initial setting of the concrete iswaited, and finally the innermost-layer pile casing is pulled out vertically and upwards; concrete is poured into the pile hole again; and in the same way, the steps are repeated until the liquid level of the concrete is flush with the surface of a foundation, and all the pile casings are pulled out. According to the method, the hole collapse phenomenon in rotary excavating pile construction can be effectively improved.
本申请涉及一种旋挖桩防塌孔施工方法，包括以下步骤：测量放样桩位；于桩位中心向地基层下垂直插入第一段护筒；于桩位中心向地基层下垂直插入下一段护筒，该段护筒的外径小于上一段护筒的直径，且长度大于上一段护筒的长度；以此类推，重复该步骤，直至最内层护筒的底端达到桩孔要求深度；以最内层护筒的轴心为中心向下钻孔，形成桩孔；向桩孔内下放钢筋笼；向桩孔内首次浇筑混凝土，混凝土液面恰好超过临近护筒底端面所在高度时，停止浇筑，等待混凝土初凝，最后竖直向上拔出最内层护筒；再次向桩孔内浇筑混凝土；以此类推，重复该步骤，直至混凝土液面与地基表面平齐，所有护筒全部被拔出。本申请能够有效改善旋挖桩施工中的塌孔现象。
Anti-hole-collapse construction method for rotary excavating pile
The invention relates to an anti-hole-collapse construction method for a rotary excavating pile. The method comprises the following steps that survey and setting out of a pile position are carried out; a first section of pile casing is vertically inserted below a foundation layer from the center of the pile position; a next section of pile casing is vertically inserted below the foundation layer from the center of the pile position, the outer diameter of the section of pile casing is smaller than the diameter of the previous section of pile casing, and the length of the section of pile casingis larger than that of the previous section of pile casing; in the same way, the steps are repeated until the bottom end of an innermost-layer pile casing reaches the required depth of a pile hole; downward drilling is carried out with the axis of the innermost-layer pile casing as the center, and the pile hole is formed; a reinforcement cage is lowered into the pile hole; concrete is poured intothe pile hole for the first time, when the liquid level of the concrete just exceeds the height close to the bottom end face of the pile casing, pouring is stopped, initial setting of the concrete iswaited, and finally the innermost-layer pile casing is pulled out vertically and upwards; concrete is poured into the pile hole again; and in the same way, the steps are repeated until the liquid level of the concrete is flush with the surface of a foundation, and all the pile casings are pulled out. According to the method, the hole collapse phenomenon in rotary excavating pile construction can be effectively improved.
本申请涉及一种旋挖桩防塌孔施工方法，包括以下步骤：测量放样桩位；于桩位中心向地基层下垂直插入第一段护筒；于桩位中心向地基层下垂直插入下一段护筒，该段护筒的外径小于上一段护筒的直径，且长度大于上一段护筒的长度；以此类推，重复该步骤，直至最内层护筒的底端达到桩孔要求深度；以最内层护筒的轴心为中心向下钻孔，形成桩孔；向桩孔内下放钢筋笼；向桩孔内首次浇筑混凝土，混凝土液面恰好超过临近护筒底端面所在高度时，停止浇筑，等待混凝土初凝，最后竖直向上拔出最内层护筒；再次向桩孔内浇筑混凝土；以此类推，重复该步骤，直至混凝土液面与地基表面平齐，所有护筒全部被拔出。本申请能够有效改善旋挖桩施工中的塌孔现象。
Anti-hole-collapse construction method for rotary excavating pile
一种旋挖桩防塌孔施工方法
JIANG PENGZHAN (author)
2020-12-29
Patent
Electronic Resource
Chinese
IPC:
E02D
FOUNDATIONS
,
Gründungen
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