地下排水管道钢板桩施工方案.docVIP

概述General 90万吨/年乙烯装置地下管道污染雨水及生产污水管道（SD）部分主管线施工时，由于沟深较深，且靠近装置区已经施工完毕的道路，故管沟开挖时无法进行放坡处理，为防止开挖时发生塌陷，将已经施工完毕的路基破坏掉，因此靠近路边的沟槽边坡在施工时需要进行特殊施工技术处理，经慎重考虑，采用打钢板桩的方式来保护路基。需要进行技术处理的道路有2#路（MHS.PC-08～MHS.PC- 11之间）、4#路、8#路（MHS.PC-49～MHS.PC- 51之间）、10#路。 During the main pipeline construction of pollution rain water and production pollution pipe (SD) in UG pipe of 900 KTAY ethylene plant ,we will implement the special construction technical treatment to the trench bank preventing collapse and damage to the completed road base instead of sloping treatment which could not be executed as proposed before because of the trench’s depth and the completion of the road adjacent to the plant. With carefully consideration ,we take the method of driving steel plate pile to protect the road base and this method will be used upon NO.2 Road (between MHS.PC-08 MHS.PC- 11),NO.4 Road ,NO.8 Road (between MHS.PC-49 MHS.PC-51) and NO.10 Road. 二、钢板桩施工 steel plate construction 2.1、开挖前，首先进行管沟开挖放线。 Setting out before trench excavation. 2.2、管沟开挖应提前进行井点降水，确保施工阶段沟槽无地下水。 Well point dewatering before trench excavation to ensure there remains no UG water during the whole period of construction. 2.3、沟槽最深挖掘深度为4.6米，因此采用拉森钢板桩，规格为12米/根。 The max depth of the trench excavated is 4.6m and we use the LASEN steel plate pile which length is 12 meter。 2.4、钢板桩的位置距离管带基础600mm。钢板桩位于道路一侧，采用单侧钢板桩铺设方法。沟槽另一侧进行放坡，坡度不小于1：1。 The distance between the steel and the pipeline foundation is 600mm. Drive steel plate pile on one side of the trench and slope on the other side with the grade no less than 1:1. 2.5、钢板桩采用重锤锤击或夯机锤击的方式进行。钢板桩顶部应高出地平面200mm。。 Drive the pile by means of punching with heavy punch or punning with punier and the top of the pile should be 200mm higher than the terrace. 2.6、钢板桩必须垂直，严禁钢板桩向沟槽方向倾斜。 The steel plate pile must be vertical and lean towards the trench is forbidden. 2.7、相临的两块钢板桩必须相互正反紧密咬合。 The steel plate piles adjacent to each other must tightening bite