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A platform for research: civil engineering, architecture and urbanism
Construction method for preventing collapse of pile foundation dry operation hole forming
The invention discloses a construction method for preventing collapse during pile foundation dry operation hole forming. The construction method comprises the following construction steps that S1, the soil texture conditions of soil layers at different depths are known through geological exploration reports and pile testing; s2, pile position lofting is carried out before pile hole forming; s3, drilling is conducted in the position of the pile core to the lowest poor soil layer; s4, a poor soil layer within the range not smaller than the pile diameter is improved in a high-pressure rotary jet grouting mode; and S5, a reinforcement cage is placed, and concrete is poured. A hole forming process which cannot be implemented by a long spiral dry operation process can be solved, the hole forming collapse risk of rotary drilling dry operation deep hole forming can be solved, compared with a slurry wall protection process, site civilized construction is cleaner, soil texture can be effectively improved, and pile forming friction force can be increased.
本发明公开了一种桩基础干作业成孔防止坍塌的施工方法，包括以下施工步骤：S1：通过地勘报告及试桩了解土层不同深度土质情况；S2：在桩成孔前桩位放样；S3：在桩芯位置进行钻孔至最低不良土质层；S4：利用高压旋喷注浆方式改良不小于桩径范围内不良土质层；S5：放置钢筋笼，进行浇筑混凝土。能够解决长螺旋干作业工艺无法实施的成孔工艺，能够解决旋挖钻干作业深孔成成孔坍塌风险，相对泥浆护壁工艺，现场文明施工更整洁，能有效改良土质，增大成桩摩擦力。
Construction method for preventing collapse of pile foundation dry operation hole forming
The invention discloses a construction method for preventing collapse during pile foundation dry operation hole forming. The construction method comprises the following construction steps that S1, the soil texture conditions of soil layers at different depths are known through geological exploration reports and pile testing; s2, pile position lofting is carried out before pile hole forming; s3, drilling is conducted in the position of the pile core to the lowest poor soil layer; s4, a poor soil layer within the range not smaller than the pile diameter is improved in a high-pressure rotary jet grouting mode; and S5, a reinforcement cage is placed, and concrete is poured. A hole forming process which cannot be implemented by a long spiral dry operation process can be solved, the hole forming collapse risk of rotary drilling dry operation deep hole forming can be solved, compared with a slurry wall protection process, site civilized construction is cleaner, soil texture can be effectively improved, and pile forming friction force can be increased.
本发明公开了一种桩基础干作业成孔防止坍塌的施工方法，包括以下施工步骤：S1：通过地勘报告及试桩了解土层不同深度土质情况；S2：在桩成孔前桩位放样；S3：在桩芯位置进行钻孔至最低不良土质层；S4：利用高压旋喷注浆方式改良不小于桩径范围内不良土质层；S5：放置钢筋笼，进行浇筑混凝土。能够解决长螺旋干作业工艺无法实施的成孔工艺，能够解决旋挖钻干作业深孔成成孔坍塌风险，相对泥浆护壁工艺，现场文明施工更整洁，能有效改良土质，增大成桩摩擦力。
Construction method for preventing collapse of pile foundation dry operation hole forming
桩基础干作业成孔防止坍塌的施工方法
LI SHENGCANG (author) / WANG GUIBIN (author) / FANG QIONG (author) / ZHANG CAN (author)
2023-06-30
Patent
Electronic Resource
Chinese
IPC:
E02D
FOUNDATIONS
,
Gründungen
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