北京地铁四号线宣武门站地模施工技巧-专业论文-中国工控网(国外英文资料).docVIP

北京地铁四号线宣武门站地模施工技术-专业论文-中国工控网(国外英文资料) Construction technology of Beijing metro line 4 xuanwu gate Author: the origin of the white ji jun: reading: 1087 release time: 2007-4-26 9:04:00: Chinese industrial control network Ming excavation method commonly used construction of subway station, underground excavation method and cover three main methods, because the subway is located in the city is usually busy and traffic volume is larger, so use less excavation method, mainly adopts cover and concealed excavation method, the PBA method and the method in hole is relatively common in underground, dig and PBA method in cover the use of the construction control mode is common. The ground module is used as a template support system, and the construction of the plate in the existing strata is carried out, and then the soil is excavated after the plate reaches strength. The advantage of the ground module is that it saves a lot of templates and scaffolding, saves time and reduces the working period. But to die generally used in large-scale operations on the board, need to meet the design or specification requirements strength to board the earthwork excavation, so the template surface material and the concrete material has a long time to contact, if isolation is not good, it very difficult to dismantle the mold, there will be many to die mortar unable to clear, forcibly remove will seriously affect the appearance of concrete. In concrete pouring after a long time, to die to achieve high strength mortar, excavation of earthwork is divided into small area to remove hard to keep clear of in time, when accumulated to a large area to remove, may suddenly drops, easy to security problems. 1 project summary Xuanwu gate is located in the xuanwu gate, the outer street and the xuanwu gate east, the west street intersection, and the existing circle line xuanwu gate stands the ten word intersection; The loop line is on the top, the fourth line is down, and the two lines are replaced by the pl