A platform for research: civil engineering, architecture and urbanism
A platform for research: civil engineering, architecture and urbanism
Construction method for steel pipe pile cofferdam without bottom sealing concrete fore shaft under deepwater shallow coverage condition
The invention discloses a construction method of a non-sealing concrete locking steel pipe pile cofferdam under the conditions of deep water and shallow coverage, which comprises the following steps: S1, lowering and driving a guide hole steel casing, and penetrating through a covering layer to enter a strong weathered rock stratum; s2, punching and drilling in the hole guiding steel casing until the designed pile bottom elevation of the moderately weathered rock stratum are reached, then ending to obtain hole guiding grooves, and repeating until a preset number of hole guiding grooves are obtained; s3, manufacturing and installing a waling inner supporting system, and integrally lowering the waling inner supporting system in place; s4, lock opening steel pipe piles are gradually inserted into the formed guide hole grooves till all the lock opening steel pipe piles are inserted and hit, and the cofferdam is closed; s5, underwater concrete is poured to the elevation position of the bottom of the bearing platform at the inner side groove section of the locking steel pipe pile cofferdam; according to the method, the guide hole grooves are drilled to the moderately weathered rock stratum, then the fore shaft steel pipe piles are inserted and driven, and the overall stability of the cofferdam structure is good; underwater fine aggregate concrete is poured on the inner side groove section of the cofferdam to connect the cofferdam and the rock stratum into a whole, and the water stopping effect is good.
本发明公开了一种深水浅覆盖条件下无封底混凝土锁口钢管桩围堰施工方法，包括：步骤S1、下放并施打引孔钢护筒，穿过覆盖层进入强风化岩层；步骤S2、在引孔钢护筒内冲孔钻进至中风化岩层的设计桩底标高后终终止，得到引孔槽，重复直至得到预设数量的引孔槽；步骤S3、制作安装围囹内支撑系统，整体下放到位；步骤S4、逐步在已开好的引孔槽内插打锁口钢管桩，直至全部插打完毕围堰合龙；步骤S5、在锁口钢管桩围堰的内侧槽段浇筑水下混凝土至承台底标高处；锁口钢管桩围堰的外侧槽段同步回填砂至河床底，本发明中钻引孔槽至中风化岩层再插打锁口钢管桩，围堰结构整体稳定性好；围堰内侧槽段浇注水下细石混凝土将围堰与岩层连成一体，止水效果好。
Construction method for steel pipe pile cofferdam without bottom sealing concrete fore shaft under deepwater shallow coverage condition
The invention discloses a construction method of a non-sealing concrete locking steel pipe pile cofferdam under the conditions of deep water and shallow coverage, which comprises the following steps: S1, lowering and driving a guide hole steel casing, and penetrating through a covering layer to enter a strong weathered rock stratum; s2, punching and drilling in the hole guiding steel casing until the designed pile bottom elevation of the moderately weathered rock stratum are reached, then ending to obtain hole guiding grooves, and repeating until a preset number of hole guiding grooves are obtained; s3, manufacturing and installing a waling inner supporting system, and integrally lowering the waling inner supporting system in place; s4, lock opening steel pipe piles are gradually inserted into the formed guide hole grooves till all the lock opening steel pipe piles are inserted and hit, and the cofferdam is closed; s5, underwater concrete is poured to the elevation position of the bottom of the bearing platform at the inner side groove section of the locking steel pipe pile cofferdam; according to the method, the guide hole grooves are drilled to the moderately weathered rock stratum, then the fore shaft steel pipe piles are inserted and driven, and the overall stability of the cofferdam structure is good; underwater fine aggregate concrete is poured on the inner side groove section of the cofferdam to connect the cofferdam and the rock stratum into a whole, and the water stopping effect is good.
本发明公开了一种深水浅覆盖条件下无封底混凝土锁口钢管桩围堰施工方法，包括：步骤S1、下放并施打引孔钢护筒，穿过覆盖层进入强风化岩层；步骤S2、在引孔钢护筒内冲孔钻进至中风化岩层的设计桩底标高后终终止，得到引孔槽，重复直至得到预设数量的引孔槽；步骤S3、制作安装围囹内支撑系统，整体下放到位；步骤S4、逐步在已开好的引孔槽内插打锁口钢管桩，直至全部插打完毕围堰合龙；步骤S5、在锁口钢管桩围堰的内侧槽段浇筑水下混凝土至承台底标高处；锁口钢管桩围堰的外侧槽段同步回填砂至河床底，本发明中钻引孔槽至中风化岩层再插打锁口钢管桩，围堰结构整体稳定性好；围堰内侧槽段浇注水下细石混凝土将围堰与岩层连成一体，止水效果好。
Construction method for steel pipe pile cofferdam without bottom sealing concrete fore shaft under deepwater shallow coverage condition
深水浅覆盖条件下无封底混凝土锁口钢管桩围堰施工方法
ZENG XIANLIU (author) / YUE XINXING (author) / LEE DONG HWI (author) / XU YONG (author) / LI GUANZHONG (author) / LIN FEIYANG (author) / GUO JIAN (author)
2023-07-21
Patent
Electronic Resource
Chinese
IPC:
E02D
FOUNDATIONS
,
Gründungen
| European Patent Office | 2022
| European Patent Office | 2022
| European Patent Office | 2023
| European Patent Office | 2021
| European Patent Office | 2024