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A platform for research: civil engineering, architecture and urbanism
Cut-off hoop for girdling and overall breaking of pile head of cast-in-situ bored pile and construction method
The invention discloses a cut-off hoop for annularly cutting and integrally breaking a pile head of a cast-in-situ bored pile and a construction method, and belongs to the technical field of pile foundation engineering construction. The pile head overall breaking method comprises the steps that after drilling is finished and before a reinforcement cage is installed, the composite loosening sleeve machined in advance is directly arranged on the surface of the outer end of a main reinforcement of an exposed bearing platform of the reinforcement cage in a sleeving mode, and the main reinforcement, stretching into the bearing platform, of the reinforcement cage is completely wrapped and sealed; the composite loosening sleeve is used for preventing the pile head concrete and the main reinforcement from being bonded. According to the method, the pile head concrete and the main reinforcements cannot be bonded, and the pile head can be broken without stripping the reinforcements and the concrete after the foundation pit is excavated and when the pile head is chiseled, so that the pile head chiseling speed is greatly increased, the overall effect after the pile head is chiseled is remarkably improved, the engineering quality is finally improved, and the construction cost is reduced.
本发明公开了一种钻孔灌注桩桩头环切整体破除的截断箍及施工方法，属于桩基工程施工技术领域。本发明包括高性能塑料复合脱松套和塑料管材，桩头整体破除法是在钻孔结束后安装钢筋笼前,将事先加工好的复合脱松套直接套入钢筋笼外露承台的主筋外端表面，将钢筋笼伸入承台的主筋全部包裹、密封；复合脱松套作用是使桩头混凝土和主筋不发生握裹。本发明可以实现桩头混凝土和主筋不发生握裹，在基坑开挖后，凿除桩头时，不进行钢筋和混凝土的剥离作业就能实现桩头破除，从而大大加快桩头凿除速度和显著提高凿完桩头后的整体效果，最终提高工程质量，降低施工成本。
Cut-off hoop for girdling and overall breaking of pile head of cast-in-situ bored pile and construction method
The invention discloses a cut-off hoop for annularly cutting and integrally breaking a pile head of a cast-in-situ bored pile and a construction method, and belongs to the technical field of pile foundation engineering construction. The pile head overall breaking method comprises the steps that after drilling is finished and before a reinforcement cage is installed, the composite loosening sleeve machined in advance is directly arranged on the surface of the outer end of a main reinforcement of an exposed bearing platform of the reinforcement cage in a sleeving mode, and the main reinforcement, stretching into the bearing platform, of the reinforcement cage is completely wrapped and sealed; the composite loosening sleeve is used for preventing the pile head concrete and the main reinforcement from being bonded. According to the method, the pile head concrete and the main reinforcements cannot be bonded, and the pile head can be broken without stripping the reinforcements and the concrete after the foundation pit is excavated and when the pile head is chiseled, so that the pile head chiseling speed is greatly increased, the overall effect after the pile head is chiseled is remarkably improved, the engineering quality is finally improved, and the construction cost is reduced.
本发明公开了一种钻孔灌注桩桩头环切整体破除的截断箍及施工方法，属于桩基工程施工技术领域。本发明包括高性能塑料复合脱松套和塑料管材，桩头整体破除法是在钻孔结束后安装钢筋笼前,将事先加工好的复合脱松套直接套入钢筋笼外露承台的主筋外端表面，将钢筋笼伸入承台的主筋全部包裹、密封；复合脱松套作用是使桩头混凝土和主筋不发生握裹。本发明可以实现桩头混凝土和主筋不发生握裹，在基坑开挖后，凿除桩头时，不进行钢筋和混凝土的剥离作业就能实现桩头破除，从而大大加快桩头凿除速度和显著提高凿完桩头后的整体效果，最终提高工程质量，降低施工成本。
Cut-off hoop for girdling and overall breaking of pile head of cast-in-situ bored pile and construction method
一种钻孔灌注桩桩头环切整体破除的截断箍及施工方法
ZHANG JUNZHI (author)
2022-03-25
Patent
Electronic Resource
Chinese
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