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Method for carrying out pile foundation construction on landform with large karst cave
The invention relates to a method for carrying out pile foundation construction on a landform with a large karst cave. The method includes the steps that step one, upper vertical holes are dug in the ground to be communicated with the underground karst cave; step two, constraint fences are installed in the karst cave through the upper vertical holes, the vertical projection area of a space defined by the constraint fences is larger than the opening area of the upper vertical holes, and all downward projections of the upper vertical holes are located in the space defined by the constraint fences; step three, the space defined by the constraint fences is filled with a filling material to form a filling block; step four, lower vertical holes are dug to a set depth through the upper vertical holes, the lower vertical holes and the upper vertical holes form pile foundation holes, and the lower vertical holes penetrate through the filling block so that the filling block can form an annular shape; and step five, concrete grout is poured into the pile foundation holes, and the concrete grout is solidified to form a pile foundation. The method for carrying out pile foundation construction on the landform with the large karst cave has the advantage that the filling area can be controlled, and the problem that the karst cave filling range is uncontrollable is solved.
本发明涉及一种具有大溶洞的地貌进行桩基础施工的方法，第一步、在地上挖上竖孔到同地下的溶洞连通；第二步、经上竖孔将约束围栏安装到溶洞内，约束围栏所围成的空间的竖向投影面积大于上竖孔的开口面积，上竖孔朝下的投影全部位于约束围栏所围成的空间内；第三步、在约束围栏所围成的空间内填充填充材料而形成填充块；第四步、经上竖孔进行挖下竖孔到设定深度，下竖孔和上竖孔构成桩基础洞，下竖孔贯通填充块使得填充块形成环形；第五步、灌注混凝土浆到桩基础洞内，混凝土浆固化形成桩基础。本发明具有能够控制填充区域的优点，解决了溶洞填充范围不可控的问题。
Method for carrying out pile foundation construction on landform with large karst cave
The invention relates to a method for carrying out pile foundation construction on a landform with a large karst cave. The method includes the steps that step one, upper vertical holes are dug in the ground to be communicated with the underground karst cave; step two, constraint fences are installed in the karst cave through the upper vertical holes, the vertical projection area of a space defined by the constraint fences is larger than the opening area of the upper vertical holes, and all downward projections of the upper vertical holes are located in the space defined by the constraint fences; step three, the space defined by the constraint fences is filled with a filling material to form a filling block; step four, lower vertical holes are dug to a set depth through the upper vertical holes, the lower vertical holes and the upper vertical holes form pile foundation holes, and the lower vertical holes penetrate through the filling block so that the filling block can form an annular shape; and step five, concrete grout is poured into the pile foundation holes, and the concrete grout is solidified to form a pile foundation. The method for carrying out pile foundation construction on the landform with the large karst cave has the advantage that the filling area can be controlled, and the problem that the karst cave filling range is uncontrollable is solved.
本发明涉及一种具有大溶洞的地貌进行桩基础施工的方法，第一步、在地上挖上竖孔到同地下的溶洞连通；第二步、经上竖孔将约束围栏安装到溶洞内，约束围栏所围成的空间的竖向投影面积大于上竖孔的开口面积，上竖孔朝下的投影全部位于约束围栏所围成的空间内；第三步、在约束围栏所围成的空间内填充填充材料而形成填充块；第四步、经上竖孔进行挖下竖孔到设定深度，下竖孔和上竖孔构成桩基础洞，下竖孔贯通填充块使得填充块形成环形；第五步、灌注混凝土浆到桩基础洞内，混凝土浆固化形成桩基础。本发明具有能够控制填充区域的优点，解决了溶洞填充范围不可控的问题。
Method for carrying out pile foundation construction on landform with large karst cave
具有大溶洞的地貌进行桩基础施工的方法
HE YANGMIN (author) / HONG XIANGSHUI (author) / ZHANG ZHIWEI (author) / ZHANG RUIDONG (author) / CHENG JIAJIA (author) / MEI DING (author) / XIA QI (author) / LI TONG (author) / ZHANG CHAOFENG (author) / ZHANG LUQUN (author)
2021-08-10
Patent
Electronic Resource
Chinese
IPC:
E02D
FOUNDATIONS
,
Gründungen
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