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Water stop construction method for deepwater pebble covering layer embedded lock catch steel pipe pile cofferdam
The invention relates to a deepwater pebble covering layer embedded lock catch steel pipe pile cofferdam water stop construction method, which comprises the following steps of: firstly, inserting and driving a steel casing at a designed inserting and driving position of a steel pipe pile, forming a large-diameter steel pipe pile hole by inserting and driving the steel pipe pile into a rock layer below a pebble covering layer according to the inserting and driving depth, then backfilling clay in the steel casing, and pulling out the steel casing; a plurality of grout outlet holes are formed in the pipe wall of the lower end of a steel pipe pile in advance, then the steel pipe pile is inserted into a pile hole, clay in the steel pipe pile is removed, a grouting device is placed in the steel pipe pile, the grouting device forms a closed space in the steel pipe pile, and cement paste is pressed into the steel pipe pile through the grouting device. Cement paste is pressed between the steel pipe piles and the rock stratum through the grout outlet holes in the steel pipe piles under high pressure, the steel pipe piles and the rock stratum are firmly combined, it can be guaranteed that the steel pipe piles are kept stable under the water flow impact effect, water outside the cofferdam can be prevented from permeating into the cofferdam from the positions between the steel pipe piles and the rock stratum, and therefore the water stopping effect of the cofferdam is improved.
本发明涉及一种深水卵石覆盖层埋栽式锁扣钢管桩围堰止水施工方法，先在钢管桩的设计插打位置插打一钢护筒，插打到卵石覆盖层下方岩层内钢管桩涉及插打深度，形成大直径的钢管桩桩孔，然后在钢护筒内回填黏土，拔出钢护筒；预先在钢管桩下端管壁上开设多个出浆孔，再将钢管桩插入桩孔内，清除钢管桩内黏土，在钢管桩内放入压浆装置，压浆装置在钢管桩内形成一密闭空间，通过压浆装置向钢管桩内压入水泥浆，水泥浆在高压下通过钢管桩上的出浆孔压入钢管桩与岩层之间，将钢管桩与岩层牢固结合，能保证钢管桩在水流冲击作用下保持稳定，而且能阻止围堰外的水从钢管桩与岩层之间渗入围堰内，从而提高围堰止水效果。
Water stop construction method for deepwater pebble covering layer embedded lock catch steel pipe pile cofferdam
The invention relates to a deepwater pebble covering layer embedded lock catch steel pipe pile cofferdam water stop construction method, which comprises the following steps of: firstly, inserting and driving a steel casing at a designed inserting and driving position of a steel pipe pile, forming a large-diameter steel pipe pile hole by inserting and driving the steel pipe pile into a rock layer below a pebble covering layer according to the inserting and driving depth, then backfilling clay in the steel casing, and pulling out the steel casing; a plurality of grout outlet holes are formed in the pipe wall of the lower end of a steel pipe pile in advance, then the steel pipe pile is inserted into a pile hole, clay in the steel pipe pile is removed, a grouting device is placed in the steel pipe pile, the grouting device forms a closed space in the steel pipe pile, and cement paste is pressed into the steel pipe pile through the grouting device. Cement paste is pressed between the steel pipe piles and the rock stratum through the grout outlet holes in the steel pipe piles under high pressure, the steel pipe piles and the rock stratum are firmly combined, it can be guaranteed that the steel pipe piles are kept stable under the water flow impact effect, water outside the cofferdam can be prevented from permeating into the cofferdam from the positions between the steel pipe piles and the rock stratum, and therefore the water stopping effect of the cofferdam is improved.
本发明涉及一种深水卵石覆盖层埋栽式锁扣钢管桩围堰止水施工方法，先在钢管桩的设计插打位置插打一钢护筒，插打到卵石覆盖层下方岩层内钢管桩涉及插打深度，形成大直径的钢管桩桩孔，然后在钢护筒内回填黏土，拔出钢护筒；预先在钢管桩下端管壁上开设多个出浆孔，再将钢管桩插入桩孔内，清除钢管桩内黏土，在钢管桩内放入压浆装置，压浆装置在钢管桩内形成一密闭空间，通过压浆装置向钢管桩内压入水泥浆，水泥浆在高压下通过钢管桩上的出浆孔压入钢管桩与岩层之间，将钢管桩与岩层牢固结合，能保证钢管桩在水流冲击作用下保持稳定，而且能阻止围堰外的水从钢管桩与岩层之间渗入围堰内，从而提高围堰止水效果。
Water stop construction method for deepwater pebble covering layer embedded lock catch steel pipe pile cofferdam
深水卵石覆盖层埋栽式锁扣钢管桩围堰止水施工方法
YANG YUANHAI (author) / XUE HUI (author) / WANG ANWEN (author) / WANG JIN (author) / XU JUN (author)
2023-08-04
Patent
Electronic Resource
Chinese
IPC:
E02D
FOUNDATIONS
,
Gründungen
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