地铁隧道长管棚施工相关技术研究
2021-10-31李伟
李伟



摘 要:该路段的路线主要位于红旗街的南北两侧。该路线从公滨路站出发,然后沿北前进,经过红旗街高架桥和哈尔滨工业大学香坊筒子楼,接着穿越下方人防通道,继而到达珠江路站,采用倒挂井壁法进行竖井施工。根据物探资料,高层建筑为地面17层,地下1层,桩基础,桩径600mm,桩长大于16.8m,框架结构;南侧及北侧多层建筑均为地面7层,地下1层,为砖混结构。
关键词:南北敷设 倒挂井壁法施工 砖混结构 桩基础
中图分类号:TU94 文献标识码:A 文章编号:1674-098X(2021)06(c)-0020-04
Abstract: The route of this section is mainly located on the north and south sides of Hongqi Street. The route starts from Gongbin Road Station, then goes north, passes through Hongqi Street Viaduct and Xiangfang Tongzilou of Harbin Institute of Technology, then crosses the civil air defense channel below, and then reaches Zhujiang Road Station. The shaft construction is carried out by upside down shaft wall method. According to geophysical data, the high-rise building has 17 floors on the ground and 1 floor underground, with pile foundation, pile diameter of 600mm, pile length of more than 16.8m and frame structure; The south and north multi-storey buildings have 7 floors on the ground and 1 floor underground, which are brick concrete structures.
Key Words: North-south laying; Upside-down shaft wall method construction; Brick-concrete structure; Pile foundation
1 工程概况
哈尔滨市位于我国东北部,黑龙江省西南部,处于东北亚中心区域,哈尔滨市区的地域较平缓,哈尔滨的东部属于丘陵地带,它的东南地势较高,西北地势较低,东南高、西北低这样就形成一种倾斜角度,哈尔滨市的平均海拔高度大概为151m。哈尔滨市区地理位置处于松花江形成的三级阶地上:第一级阶地海拔为132~140m,地势平缓;第二级阶地海拔为145~175m,由第一级阶地演化而来,没有较大界限,这部分地区长期受流水侵蚀,地势低洼,土地湿润;第三级阶地海拔为180~200m,主要为山地地区。施工场场地形平坦,标高在141.90~144.30m。
2 管棚断面支护设计参数
该施工场位于区段在穿越哈尔滨工业大学家属院香坊筒子楼及其南北附近建筑时需设置管棚工作室,其设置点如表1所示。
大管棚分为两段施工,施工方法采用水平定向的施工工藝和根管钻孔的施工方法[1]。左DK19+451.507~ 左DK19+460.423处管棚工作室开始打设第一段53m管棚,左DK19+400~左DK19+408.450开始打设第二段50m管棚,第一段管棚与第二段管棚搭接长度3m。……
