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一环路雨水支管临时迁改施工方案

2020-06-08杨钢

杨钢

【摘  要】经调查一环路南三段南北两侧非机动车道下各有1条直径为1000的雨水支管,其流向为从西往东,最终在十字路口处汇入人民南路一条南北走向的雨水主管内,但因雨水主管恰好位于地铁车站的基坑范围内必须进行迁改。根据成都市市政工程设计院的排水工程施工图设计,一环路交叉路口处新增一段横跨基坑直径为1400的雨水支管,将一环路的雨水直接引入人民南路东侧新建的雨水管内。

【Abstract】After investigation, there is a rainwater branch pipe with a diameter of 1000 under the non-motorized lane on the south and north sides of the third section of the first ring road, which flows from west to east and eventually flows into a north-south direction of Renmin South Road at the intersection, but the storm water supervisor must be relocated as it happens to be located within the foundation pit of the subway station. According to the construction drawing design of drainage project of Chengdu Municipal Engineering Design Institute, a new section of rain water branch pipe across the diameter of 1400 of foundation pit is added at the intersection of the first ring road, and the rain water of the first ring road is directly introduced into the newly built rain water pipe on the east side of Renmin South Road.

【关键词】市政工程;雨水支管;施工方案

【Keywords】 municipal engineering; rain water branch pipe; construction scheme

【中图分类号】TU991                               【文獻标志码】A                                   【文章编号】1673-1069(2020)02-0195-02

1 方案说明

1.1 迁改的必要性

由于管线位置重叠以及悬吊保护困难导致前期内无法进行1400砼雨水支管的施工。换乘节点处围护结构尚未开始施工,严重影响整体施工工期。按照目前施工计划要求,对一环路二期围挡进行围挡,而该雨水支管在基坑内影响围护结构及土方开挖的施工。为了既能保证地铁车站的施工,又不影响整个一环路雨水的正常排放。将一环路雨水管线基坑部分采用1400钢管进行永久迁改,安全可靠便于悬吊保护。

1.2 位置的确定

上水管在钢便桥最南边一榀主梁下,所以该雨水管道必须从便桥南侧通过。便桥南侧与预留沟槽端墙净空只有2m,雨水管道施工困难较大,考虑施工方便,将便桥最南边一榀主梁往北移1m。由于雨水管道位置与北侧上水管距离近,雨水管道仍然在325的煤气管道偏北的位置下面通过。

1.3 土方开挖

该处管线多且复杂,只能采用人工开挖倒运土方的方式。……

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