某市轨道交通首都国际机场线01标段--围护桩施工测量方案.doc

工程概况：机场线东直门车站长约191米，宽22.24米，深约28米，分安全线、暗挖A段、明挖B段、明暗结合（上跨下穿）C段和明挖D段，明挖结构采用围护桩+锚索体系和围护桩+钢支撑体系。围护桩分为5类结构形式，分别为桩A（B段西侧和南侧），上部为人工挖孔桩，桩径为1100mm，下部为钻孔灌注桩，桩长为30.96m，桩径为1000mm；桩B（B段北侧），上部为人工挖孔桩，桩径为1100mm，下部为钻孔灌注桩，桩长为13.36m，桩径为600mm；桩C（C段东西侧），桩长为24.8m，桩径为800mm；桩D（D段东南侧），桩长为29.96m，桩径为1000mm；桩E（D段北侧），桩长为29.96m，桩径为800mm。由于现场管线复杂，每个桩位都需要开挖探孔以证明是否有不明管线，之后才进行钻孔作业。
Project Overview: Dongzhimen Airport Express station about 191 meters wide and 22.24 meters, about 28 meters deep, sub-safe line, excavation A section, cut and cover section B, light and dark combination (on the cross next to wear) C section and cut and cover D segment, cut-pile structure with envelope envelope pile anchor system and a steel support system. Supporting pile structure is divided into five categories, namely pile A (B section of the west and south), the upper part of manual digging pile, the pile diameter is 1100mm, the lower part of the pile, the pile length is 30.96m, pile diameter 1000mm; pile B (B section of the north side), upper part of the artificial foundation pile, the pile diameter is 1100mm, the lower part of the pile, the pile length is 13.36m, the pile diameter is 600mm; pile C (C section of east and west sides ), pile length of 24.8m, the pile diameter is 800mm; pile D (D the southeast side), the pile length is 29.96m, the pile diameter is 1000mm; pile E (D section of the north), the pile length is 29.96m, the pile diameter to 800mm. As the on-site pipeline complex, each pile location requires excavation of trial pits in order to prove whether there is an unknown pipeline, after the drilling operation.