Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Construction method for cast-in-place pile passing through karst cave
The invention discloses a construction method for a cast-in-place pile passing through a karst cave. The construction method for the cast-in-place pile passing through the karst cave is characterizedby comprising the following steps of drilling an enlarged hole, specifically, drilling the enlarged hole slightly larger than the designed pile diameter on the ground, and penetrating through a karstcave area until reaching the designed pile depth; placing a protective cylinder downwards, specifically, placing the protective cylinder downwards into the enlarged hole, enabling the bottom of the protective cylinder to reach the designed pile depth, and enabling the inner diameter of the protective cylinder to be slightly larger than the designed pile diameter and slightly smaller than the diameter of the enlarged hole; stabilizing the protective cylinder, specifically, filling the gap between the protective cylinder and the enlarged hole with crushed materials until the crushed materials are higher than the ground surface; clearing the hole and sealing the bottom, specifically, cleaning residues in the protective cylinder, pouring and sealing the bottom after meeting the design requirement; and pouring a pile foundation, specifically, placing a reinforcement cage downwards in the protective cylinder, and pouring pile body concrete. According to the construction method for the cast-in-place pile passing through the karst cave, firstly, the enlarged hole is drilled on the ground, the protective cylinder is lowered, then, the hole is cleaned in the protective cylinder, and the bottom is poured and sealed, so that the hole forming rate can be ensured, and the phenomena of pouring concrete loss, pile body cavity and the like can be avoided.
本发明公开了一种穿越溶洞的灌注桩施工方法，其特征在于包括以下步骤：钻制扩大孔，在地面上钻制比设计桩径略大的扩大孔，穿越溶洞区域直至设计桩深；下放护筒，将护筒下放到扩大孔内，护筒底部直达设计桩深，护筒的内径略大于设计桩径且略小于扩大孔的孔径；稳定护筒，采用碎料填充护筒与扩大孔间的间隙，直到碎料高出地表；清孔封底，清理护筒内残渣，满足设计要求后浇筑封底；清孔封底，清理护筒内残渣，满足设计要求后浇筑封底；浇筑桩基，在护筒内下放钢筋笼，浇筑桩身混凝土。本发明中，先在地面上钻制扩大孔并下放护筒，再在护筒内清孔并浇筑封底，能够保证成孔率，避免出现浇筑混凝土流失、桩身空洞等现象。
Construction method for cast-in-place pile passing through karst cave
The invention discloses a construction method for a cast-in-place pile passing through a karst cave. The construction method for the cast-in-place pile passing through the karst cave is characterizedby comprising the following steps of drilling an enlarged hole, specifically, drilling the enlarged hole slightly larger than the designed pile diameter on the ground, and penetrating through a karstcave area until reaching the designed pile depth; placing a protective cylinder downwards, specifically, placing the protective cylinder downwards into the enlarged hole, enabling the bottom of the protective cylinder to reach the designed pile depth, and enabling the inner diameter of the protective cylinder to be slightly larger than the designed pile diameter and slightly smaller than the diameter of the enlarged hole; stabilizing the protective cylinder, specifically, filling the gap between the protective cylinder and the enlarged hole with crushed materials until the crushed materials are higher than the ground surface; clearing the hole and sealing the bottom, specifically, cleaning residues in the protective cylinder, pouring and sealing the bottom after meeting the design requirement; and pouring a pile foundation, specifically, placing a reinforcement cage downwards in the protective cylinder, and pouring pile body concrete. According to the construction method for the cast-in-place pile passing through the karst cave, firstly, the enlarged hole is drilled on the ground, the protective cylinder is lowered, then, the hole is cleaned in the protective cylinder, and the bottom is poured and sealed, so that the hole forming rate can be ensured, and the phenomena of pouring concrete loss, pile body cavity and the like can be avoided.
本发明公开了一种穿越溶洞的灌注桩施工方法，其特征在于包括以下步骤：钻制扩大孔，在地面上钻制比设计桩径略大的扩大孔，穿越溶洞区域直至设计桩深；下放护筒，将护筒下放到扩大孔内，护筒底部直达设计桩深，护筒的内径略大于设计桩径且略小于扩大孔的孔径；稳定护筒，采用碎料填充护筒与扩大孔间的间隙，直到碎料高出地表；清孔封底，清理护筒内残渣，满足设计要求后浇筑封底；清孔封底，清理护筒内残渣，满足设计要求后浇筑封底；浇筑桩基，在护筒内下放钢筋笼，浇筑桩身混凝土。本发明中，先在地面上钻制扩大孔并下放护筒，再在护筒内清孔并浇筑封底，能够保证成孔率，避免出现浇筑混凝土流失、桩身空洞等现象。
Construction method for cast-in-place pile passing through karst cave
一种穿越溶洞的灌注桩施工方法
LU SHUN (Autor:in) / QI XINGYU (Autor:in) / YAN XIAOQING (Autor:in) / CHEN ZHAOWEI (Autor:in) / GAO HUAILIANG (Autor:in) / ZHU YAO (Autor:in)
02.10.2020
Patent
Elektronische Ressource
Chinesisch
IPC:
E02D
FOUNDATIONS
,
Gründungen
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