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A platform for research: civil engineering, architecture and urbanism
Cast-in-situ bored pile construction method based on post-grouting design
The invention discloses a cast-in-situ bored pile construction method based on post-grouting design, which comprises the following steps: connecting a grouting pipe to a reinforcement cage, mounting a grouting valve at the end part of the grouting pipe, feeding the grouting pipe and the grouting valve into a hole by mounting the reinforcement cage, and filling broken stones at the bottom of the hole; after a reinforcement cage enters a hole and is installed, an orifice grating is placed at a pile hole, gravel filling flatness is effectively guaranteed through subarea gravel filling, and after pile foundation concrete pouring is completed for a certain period, grouting operation is conducted through a grouting pipe and a grouting valve. The outlet of the mud jacking valve is covered by filling the broken stones at the bottom of the hole, so that resistance caused by concrete hardening during mud jacking in a traditional method is avoided, and the problem that pile end post-mud jacking is difficult to break through pile foundation hardened concrete can be solved under the condition that the bearing capacity of a pile foundation is ensured.
本发明公开了一种基于后压浆设计的钻孔灌注桩施工方法，通过将压浆管连接在钢筋笼上并在压浆管的端部安装压浆阀，通过安装钢筋笼将压浆管及压浆阀送入孔中，在孔底填充碎石；钢筋笼入孔安装完成后，在桩孔处安放孔口格栅，通过分区填充碎石，有效保证了碎石填充的平整度，在完成桩基混凝土灌注一定期限后，通过压浆管及压浆阀进行压浆作业。通过孔底填充碎石的方式覆盖住压浆阀出口，避免了传统做法中压浆时需克服混凝土硬化带来的阻力，可在保证桩基承载力的情况下解决桩端后压浆难以突破桩基硬化混凝土的问题。
Cast-in-situ bored pile construction method based on post-grouting design
The invention discloses a cast-in-situ bored pile construction method based on post-grouting design, which comprises the following steps: connecting a grouting pipe to a reinforcement cage, mounting a grouting valve at the end part of the grouting pipe, feeding the grouting pipe and the grouting valve into a hole by mounting the reinforcement cage, and filling broken stones at the bottom of the hole; after a reinforcement cage enters a hole and is installed, an orifice grating is placed at a pile hole, gravel filling flatness is effectively guaranteed through subarea gravel filling, and after pile foundation concrete pouring is completed for a certain period, grouting operation is conducted through a grouting pipe and a grouting valve. The outlet of the mud jacking valve is covered by filling the broken stones at the bottom of the hole, so that resistance caused by concrete hardening during mud jacking in a traditional method is avoided, and the problem that pile end post-mud jacking is difficult to break through pile foundation hardened concrete can be solved under the condition that the bearing capacity of a pile foundation is ensured.
本发明公开了一种基于后压浆设计的钻孔灌注桩施工方法，通过将压浆管连接在钢筋笼上并在压浆管的端部安装压浆阀，通过安装钢筋笼将压浆管及压浆阀送入孔中，在孔底填充碎石；钢筋笼入孔安装完成后，在桩孔处安放孔口格栅，通过分区填充碎石，有效保证了碎石填充的平整度，在完成桩基混凝土灌注一定期限后，通过压浆管及压浆阀进行压浆作业。通过孔底填充碎石的方式覆盖住压浆阀出口，避免了传统做法中压浆时需克服混凝土硬化带来的阻力，可在保证桩基承载力的情况下解决桩端后压浆难以突破桩基硬化混凝土的问题。
Cast-in-situ bored pile construction method based on post-grouting design
一种基于后压浆设计的钻孔灌注桩施工方法
DANG TAO (author) / WU ZHENG (author) / REN LIJUN (author) / CUI QUANGANG (author) / LEI WEI (author) / QI XIPENG (author) / LIANG HUI (author) / MIAO MIAO (author) / CHEN QIANG (author) / CHANG CHAO (author)
2023-11-17
Patent
Electronic Resource
Chinese
IPC:
E02D
FOUNDATIONS
,
Gründungen
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