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Small round deep foundation pit construction method
The small round deep foundation pit construction method comprises the following steps that foundation pit upheaval checking calculation, inrush stability checking calculation and anti-floating stability checking calculation are conducted on the basis of a geological exploration report, and site leveling is conducted; measuring and lofting, measuring by combining a design drawing to obtain a center coordinate of the deep foundation pit, and lofting a pile position; a positive circulation rotary drilling machine is matched with a large-diameter drill bit to form holes; after the drilled hole reaches the designed depth and meets geological conditions, hole cleaning and hole forming detection are carried out; a steel sleeve is embedded before bottom sealing, bottom sealing is conducted underwater, slurry is pumped, bottom sealing concrete is poured at the bottom of a foundation pit, and after bottom sealing is completed, the slurry is drained through a slurry pump, and the foundation pit is cleaned. Static non-interference construction can be achieved without foundation pit dewatering, damage to adjacent buildings and stratums is small, cost is low, and the progress, safety and quality of engineering construction are guaranteed.
本发明的一种小型圆形深基坑施工方法，包括以下步骤：基于地勘报告，进行基坑隆起验算，突涌稳定性验算，抗浮稳定性验算，并进行场地平整；测量放样，结合设计图纸测量得到深基坑中心坐标，放样桩位；采用正循环回旋钻机配合大直径钻头成孔；钻孔达到设计深度并满足地质条件后进行清孔和成孔检测；在封底前埋设钢套筒，在水下封底并抽取泥浆，并在基坑底部浇筑封底混凝土，封底完成后通过泥浆泵将泥浆排干并清理基坑。本发明无需基坑降水即可实现静态无干扰施工，对临近建筑物和地层的破坏小，成本低，工程施工的进度、安全和质量有保证。
Small round deep foundation pit construction method
The small round deep foundation pit construction method comprises the following steps that foundation pit upheaval checking calculation, inrush stability checking calculation and anti-floating stability checking calculation are conducted on the basis of a geological exploration report, and site leveling is conducted; measuring and lofting, measuring by combining a design drawing to obtain a center coordinate of the deep foundation pit, and lofting a pile position; a positive circulation rotary drilling machine is matched with a large-diameter drill bit to form holes; after the drilled hole reaches the designed depth and meets geological conditions, hole cleaning and hole forming detection are carried out; a steel sleeve is embedded before bottom sealing, bottom sealing is conducted underwater, slurry is pumped, bottom sealing concrete is poured at the bottom of a foundation pit, and after bottom sealing is completed, the slurry is drained through a slurry pump, and the foundation pit is cleaned. Static non-interference construction can be achieved without foundation pit dewatering, damage to adjacent buildings and stratums is small, cost is low, and the progress, safety and quality of engineering construction are guaranteed.
本发明的一种小型圆形深基坑施工方法，包括以下步骤：基于地勘报告，进行基坑隆起验算，突涌稳定性验算，抗浮稳定性验算，并进行场地平整；测量放样，结合设计图纸测量得到深基坑中心坐标，放样桩位；采用正循环回旋钻机配合大直径钻头成孔；钻孔达到设计深度并满足地质条件后进行清孔和成孔检测；在封底前埋设钢套筒，在水下封底并抽取泥浆，并在基坑底部浇筑封底混凝土，封底完成后通过泥浆泵将泥浆排干并清理基坑。本发明无需基坑降水即可实现静态无干扰施工，对临近建筑物和地层的破坏小，成本低，工程施工的进度、安全和质量有保证。
Small round deep foundation pit construction method
一种小型圆形深基坑施工方法
CHEN WEIREN (author) / LIANG YAOXING (author) / LI FUQIANG (author) / XU XIN (author) / LIU JINGXIN (author) / YANG MINGQIU (author) / WU CHAO (author) / CHEN JINJIA (author) / YANG HAO (author)
2022-03-04
Patent
Electronic Resource
Chinese
IPC:
E02D
FOUNDATIONS
,
Gründungen
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