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PHC tubular pile guide hole pile sinking construction method for deep soft foundation
The PHC tubular pile guide hole pile sinking construction method for the deep soft foundation comprises the following steps that S1, tube wells are evenly distributed in a foundation pit for dewatering, the underground water level is lowered to be 1.5 m or below the designed elevation of the pile bottom, and the height of the underground water level needs to be monitored in real time in the whole dewatering process and within 12 h or above after dewatering; s2, according to a geotechnical engineering investigation report and a design drawing, to-be-driven areas of different soil layers in the site are divided into N rectangular subareas, and a technician gives out the specific distribution position of pile sites of each subarea; s3, five test pile sites are randomly selected in each subarea, and a long auger drilling machine is used for hole guiding; s4, pile feeding is conducted on the five guide hole pile testing sites, and pile testing results in all the subareas are analyzed; and S5, pile body integrity detection and bearing capacity detection are conducted, and foundation construction is conducted after detection is completed. According to the invention, the field is divided into a plurality of subareas, and each subarea is subjected to independent precipitation, so that the precipitation efficiency of each subarea is improved.
本发明公开了一种用于深厚软基的PHC管桩引孔沉桩施工方法，包括以下步骤：S1、在基坑内均匀布设管井进行降水，将地下水位降至桩底设计标高1.5m以下，整个降水过程中以及降水后12h以上的时间内均需实时监测地下水位的高度；S2、根据岩土工程勘察报告和设计图纸，将场地内不同土层待打桩区域分成N个矩形分区，并由技术人员放出每个分区桩位点分布具体位置；S3、在每个分区随机选择5个的试桩位点，使用长螺旋钻孔机进行引孔；S4、将5个引孔试桩位点送桩，并分析各个分区内的试桩结果；S5、进行桩身完整性检测和承载力检测，待检测完成后进行基础施工。本发明通过将现场分为多个分区，对每个分区单独降水，提高了每个分区的降水效率。
PHC tubular pile guide hole pile sinking construction method for deep soft foundation
The PHC tubular pile guide hole pile sinking construction method for the deep soft foundation comprises the following steps that S1, tube wells are evenly distributed in a foundation pit for dewatering, the underground water level is lowered to be 1.5 m or below the designed elevation of the pile bottom, and the height of the underground water level needs to be monitored in real time in the whole dewatering process and within 12 h or above after dewatering; s2, according to a geotechnical engineering investigation report and a design drawing, to-be-driven areas of different soil layers in the site are divided into N rectangular subareas, and a technician gives out the specific distribution position of pile sites of each subarea; s3, five test pile sites are randomly selected in each subarea, and a long auger drilling machine is used for hole guiding; s4, pile feeding is conducted on the five guide hole pile testing sites, and pile testing results in all the subareas are analyzed; and S5, pile body integrity detection and bearing capacity detection are conducted, and foundation construction is conducted after detection is completed. According to the invention, the field is divided into a plurality of subareas, and each subarea is subjected to independent precipitation, so that the precipitation efficiency of each subarea is improved.
本发明公开了一种用于深厚软基的PHC管桩引孔沉桩施工方法，包括以下步骤：S1、在基坑内均匀布设管井进行降水，将地下水位降至桩底设计标高1.5m以下，整个降水过程中以及降水后12h以上的时间内均需实时监测地下水位的高度；S2、根据岩土工程勘察报告和设计图纸，将场地内不同土层待打桩区域分成N个矩形分区，并由技术人员放出每个分区桩位点分布具体位置；S3、在每个分区随机选择5个的试桩位点，使用长螺旋钻孔机进行引孔；S4、将5个引孔试桩位点送桩，并分析各个分区内的试桩结果；S5、进行桩身完整性检测和承载力检测，待检测完成后进行基础施工。本发明通过将现场分为多个分区，对每个分区单独降水，提高了每个分区的降水效率。
PHC tubular pile guide hole pile sinking construction method for deep soft foundation
一种用于深厚软基的PHC管桩引孔沉桩施工方法
ZHANG XIAODONG (author) / LIU BAOTANG (author) / ZHANG DALONG (author) / GAO RUIXIN (author)
2023-07-18
Patent
Electronic Resource
Chinese
IPC:
E02D
FOUNDATIONS
,
Gründungen
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