A platform for research: civil engineering, architecture and urbanism
A platform for research: civil engineering, architecture and urbanism
Dewatering well construction method of subway station open-cut interval foundation pit
The invention discloses a dewatering well construction method of a subway station open-cut interval foundation pit. The dewatering well construction method comprises the following steps of drilling a well hole with a preset depth in a soil body by using a drilling machine, injecting clear water to replace mud in the well hole, and pumping out sediment at the bottom of the well hole by using a mud pump; wrapping and fixing more than one layer of filter screen outside a prefabricated well casing, and putting the bottom end of the well casing wrapped with the filter screen downwards into the well hole; and putting gravels into an annular gap between the inner wall of the well hole and the outer wall of the well casing to form a water filtering layer until the height of the water filtering layer is lower than the preset height of a hole opening of the well hole, and then filling and tamping the annular gap above the water filtering layer by adopting clay. The dewatering well construction method is convenient and fast to construct and low in construction difficulty, and a dewatering well obtained through construction is good in filtering effect.
本发明公开了一种地铁站明挖区间基坑的降水井施工方法，包括采用钻机在土体中钻出预设深度的井孔，注入清水置换出井孔内的泥浆，采用泥浆泵抽出井孔底部的沉碴；在预制好的井管外部包裹固定一层以上滤网，将包裹好滤网的井管底端朝下下放到至井孔内；向井孔内壁与井管外壁之间的环形空隙中投放碎石形成滤水层，直至滤水层的高度至低于井孔孔口的预设高度，然后采用粘土将滤水层上方的环形空隙填实夯平的步骤。该降水井施工方法施工方便快捷、施工难度低，施工所得降水井过滤效果好。
Dewatering well construction method of subway station open-cut interval foundation pit
The invention discloses a dewatering well construction method of a subway station open-cut interval foundation pit. The dewatering well construction method comprises the following steps of drilling a well hole with a preset depth in a soil body by using a drilling machine, injecting clear water to replace mud in the well hole, and pumping out sediment at the bottom of the well hole by using a mud pump; wrapping and fixing more than one layer of filter screen outside a prefabricated well casing, and putting the bottom end of the well casing wrapped with the filter screen downwards into the well hole; and putting gravels into an annular gap between the inner wall of the well hole and the outer wall of the well casing to form a water filtering layer until the height of the water filtering layer is lower than the preset height of a hole opening of the well hole, and then filling and tamping the annular gap above the water filtering layer by adopting clay. The dewatering well construction method is convenient and fast to construct and low in construction difficulty, and a dewatering well obtained through construction is good in filtering effect.
本发明公开了一种地铁站明挖区间基坑的降水井施工方法，包括采用钻机在土体中钻出预设深度的井孔，注入清水置换出井孔内的泥浆，采用泥浆泵抽出井孔底部的沉碴；在预制好的井管外部包裹固定一层以上滤网，将包裹好滤网的井管底端朝下下放到至井孔内；向井孔内壁与井管外壁之间的环形空隙中投放碎石形成滤水层，直至滤水层的高度至低于井孔孔口的预设高度，然后采用粘土将滤水层上方的环形空隙填实夯平的步骤。该降水井施工方法施工方便快捷、施工难度低，施工所得降水井过滤效果好。
Dewatering well construction method of subway station open-cut interval foundation pit
地铁站明挖区间基坑的降水井施工方法
ZHOU HAO (author) / LIAO LINGJUN (author) / ZHOU YUEWEI (author) / HUANG GUANG (author) / LIU ZHAO (author) / ZHANG LEI (author)
2021-04-23
Patent
Electronic Resource
Chinese
IPC:
E02D
FOUNDATIONS
,
Gründungen
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