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A platform for research: civil engineering, architecture and urbanism
Crown beam construction method for subway station open-cut interval foundation pit
The invention discloses a crown beam construction method for a subway station open-cut interval foundation pit. The crown beam construction method comprises the following steps that reinforced concrete fender piles of the foundation pit are constructed and formed, a pit section at the top of the foundation pit is excavated, the upper parts of the fender piles are exposed as to-be-removed pile heads, the construction space of a to-be-constructed crown beam is obtained, an annular groove located below the pile head is formed in each fender pile, concrete on the periphery of the pile heads is chiseled away, steel bars in the pile heads are exposed and separated from the concrete, a plurality of steel chisels are driven into the annular grooves in the non-horizontal downward direction to cut off the concrete parts of the pile heads, then hoisting equipment is adopted for hoisting away the concrete parts of the pile heads, the steel bars on the upper portions of all the fender piles are exposed, a formwork is built in the foundation pit, a steel bar framework connected with the steel bars on the upper portions of all the fender piles is bound, then concrete is poured into the formwork, formwork removal and maintenance are conducted, and the crown beam is obtained. The method has the advantages of simple process, easiness in implementation, low construction difficulty, good construction quality and the like.
本发明公开了一种地铁站明挖区间基坑的冠梁施工方法，该方法包括施工形成基坑的钢筋混凝土围护桩、开挖出基坑顶部坑段，使各围护桩上部作为待去除的桩头漏出，并获得待施工冠梁的施工空间、在各围护桩上开设位于桩头下方的环形凹槽，将桩头四周的混凝土凿除，使桩头内的钢筋露出并与混凝土脱离、向环形凹槽内沿非水平向下的方向打入多个钢钎将桩头的混凝土部分切断，然后采用起吊设备将桩头的混凝土部分吊离，使各围护桩上部的钢筋露出、在基坑内搭建模板并绑扎与各围护桩上部钢筋连接的钢筋骨架，然后向模板内浇筑混凝土，拆模、养护得到冠梁的步骤。本发明具有工艺简单、易于实施、施工难度低、施工质量好等优点。
Crown beam construction method for subway station open-cut interval foundation pit
The invention discloses a crown beam construction method for a subway station open-cut interval foundation pit. The crown beam construction method comprises the following steps that reinforced concrete fender piles of the foundation pit are constructed and formed, a pit section at the top of the foundation pit is excavated, the upper parts of the fender piles are exposed as to-be-removed pile heads, the construction space of a to-be-constructed crown beam is obtained, an annular groove located below the pile head is formed in each fender pile, concrete on the periphery of the pile heads is chiseled away, steel bars in the pile heads are exposed and separated from the concrete, a plurality of steel chisels are driven into the annular grooves in the non-horizontal downward direction to cut off the concrete parts of the pile heads, then hoisting equipment is adopted for hoisting away the concrete parts of the pile heads, the steel bars on the upper portions of all the fender piles are exposed, a formwork is built in the foundation pit, a steel bar framework connected with the steel bars on the upper portions of all the fender piles is bound, then concrete is poured into the formwork, formwork removal and maintenance are conducted, and the crown beam is obtained. The method has the advantages of simple process, easiness in implementation, low construction difficulty, good construction quality and the like.
本发明公开了一种地铁站明挖区间基坑的冠梁施工方法，该方法包括施工形成基坑的钢筋混凝土围护桩、开挖出基坑顶部坑段，使各围护桩上部作为待去除的桩头漏出，并获得待施工冠梁的施工空间、在各围护桩上开设位于桩头下方的环形凹槽，将桩头四周的混凝土凿除，使桩头内的钢筋露出并与混凝土脱离、向环形凹槽内沿非水平向下的方向打入多个钢钎将桩头的混凝土部分切断，然后采用起吊设备将桩头的混凝土部分吊离，使各围护桩上部的钢筋露出、在基坑内搭建模板并绑扎与各围护桩上部钢筋连接的钢筋骨架，然后向模板内浇筑混凝土，拆模、养护得到冠梁的步骤。本发明具有工艺简单、易于实施、施工难度低、施工质量好等优点。
Crown beam construction method for subway station open-cut interval foundation pit
地铁站明挖区间基坑的冠梁施工方法
ZHAO CHENYANG (author) / YUE QIDI (author) / ZHOU HAO (author) / JIANG YAN (author) / WU HAO (author)
2021-04-23
Patent
Electronic Resource
Chinese
IPC:
E02D
FOUNDATIONS
,
Gründungen
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