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A platform for research: civil engineering, architecture and urbanism
Diaphragm wall secondary grooving construction method suitable for water-rich sandy gravel layer
The invention discloses an underground diaphragm wall secondary grooving construction method suitable for a water-rich sandy gravel layer, which comprises the following steps: 1, arranging a dewatering well (16) in a construction range of a newly-built underground diaphragm wall (3), and dewatering to a position below an excavation working surface of an outer side guide wall (1); 2, an outer side guide wall is excavated in a sloping mode, and the outer side guide wall is located between the existing diaphragm wall (2) and the newly-built diaphragm wall; 3, an outer side guide wall is constructed, and excavation earthwork backfilling of the outer side guide wall is conducted in time; 4, constructing a jet grouting pile (5) on the inner side of the newly-built diaphragm wall; 5, a soil body between the jet grouting pile and the outer side guide wall is excavated, and an inner side guide wall (6) is constructed; 6, excavating a soil body, performing secondary grooving on the newly-built underground diaphragm wall, and pouring the newly-built underground diaphragm wall; and 7, coping beams (8) are arranged on the outer side guide wall and the newly-built diaphragm wall, and inner supports (9) are constructed in the foundation pit through the coping beams. According to the method, hole collapse during secondary grooving of the underground diaphragm wall constructed in the water-rich sandy gravel layer can be avoided, and the secondary grooving quality of the newly-built underground diaphragm wall is improved.
本发明公开了一种适用于富水砂卵石层的地连墙二次成槽施工方法，包括步骤：1、在新建地连墙(3)施工范围内布置降水井(16)，并降水至外侧导墙(1)的开挖工作面以下；2、放坡开挖外侧导墙，外侧导墙位于既有地连墙(2)与新建地连墙之间；3、施工外侧导墙，并及时进行外侧导墙的开挖土方回填；4、在新建地连墙的内侧施工旋喷桩(5)；5、开挖旋喷桩与外侧导墙之间的土体并施工内侧导墙(6)；6、开挖土体，新建地连墙二次成槽，浇筑新建地连墙；7、在外侧导墙和新建地连墙上设置压顶梁(8)，并通过压顶梁在基坑内施工内支撑(9)。本发明能避免在富水砂卵石层施工地连墙二次成槽时塌孔，提高新建地连墙二次成槽质量。
Diaphragm wall secondary grooving construction method suitable for water-rich sandy gravel layer
The invention discloses an underground diaphragm wall secondary grooving construction method suitable for a water-rich sandy gravel layer, which comprises the following steps: 1, arranging a dewatering well (16) in a construction range of a newly-built underground diaphragm wall (3), and dewatering to a position below an excavation working surface of an outer side guide wall (1); 2, an outer side guide wall is excavated in a sloping mode, and the outer side guide wall is located between the existing diaphragm wall (2) and the newly-built diaphragm wall; 3, an outer side guide wall is constructed, and excavation earthwork backfilling of the outer side guide wall is conducted in time; 4, constructing a jet grouting pile (5) on the inner side of the newly-built diaphragm wall; 5, a soil body between the jet grouting pile and the outer side guide wall is excavated, and an inner side guide wall (6) is constructed; 6, excavating a soil body, performing secondary grooving on the newly-built underground diaphragm wall, and pouring the newly-built underground diaphragm wall; and 7, coping beams (8) are arranged on the outer side guide wall and the newly-built diaphragm wall, and inner supports (9) are constructed in the foundation pit through the coping beams. According to the method, hole collapse during secondary grooving of the underground diaphragm wall constructed in the water-rich sandy gravel layer can be avoided, and the secondary grooving quality of the newly-built underground diaphragm wall is improved.
本发明公开了一种适用于富水砂卵石层的地连墙二次成槽施工方法，包括步骤：1、在新建地连墙(3)施工范围内布置降水井(16)，并降水至外侧导墙(1)的开挖工作面以下；2、放坡开挖外侧导墙，外侧导墙位于既有地连墙(2)与新建地连墙之间；3、施工外侧导墙，并及时进行外侧导墙的开挖土方回填；4、在新建地连墙的内侧施工旋喷桩(5)；5、开挖旋喷桩与外侧导墙之间的土体并施工内侧导墙(6)；6、开挖土体，新建地连墙二次成槽，浇筑新建地连墙；7、在外侧导墙和新建地连墙上设置压顶梁(8)，并通过压顶梁在基坑内施工内支撑(9)。本发明能避免在富水砂卵石层施工地连墙二次成槽时塌孔，提高新建地连墙二次成槽质量。
Diaphragm wall secondary grooving construction method suitable for water-rich sandy gravel layer
适用于富水砂卵石层的地连墙二次成槽施工方法
ZHANG YUANHUI (author) / WANG JIN (author) / ZHAO YONGKUAN (author) / ZHAO MENG (author) / HE JUAN (author) / WANG CONG (author)
2023-01-17
Patent
Electronic Resource
Chinese
IPC:
E02D
FOUNDATIONS
,
Gründungen
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