您现在的位置:主页 > 路桥隧道 > 路桥技术交底 > >>

综合管沟沟槽开挖、回填施工技术交底.doc

资料评价:
★★★☆☆
更新时间:
2010-07-16
下载要求:
注册会员
文档大小:
0.01 MB
授权方式:
共享资料
上传会员:
龙龙
文档类型:
.doc
所属栏目:
路桥技术交底
需要金币:
1
资料语言:
简体中文
资料简介:免费注册 本站会员可得金币,更多赚积分方法请查看:积分说明 下载地址

交底内容:
一、土方开挖:
1.  沟槽开挖前的准备工作:
(1).  根据设计图纸的设计要求进行测量放线,定出中心桩、槽边线。
(2).  先查明开挖段的地下管线及其它地下构筑物情况,会同有关部门作出妥善处理,确保施工安全
(3).  沟槽开挖前应做好沟槽外四周的排水工作,保证场外地表水不流入沟槽。
(4).  按工程监测要求,开挖前先布置各种类型的观测点,并测定初始资料。
(5).  准备好所有的机械设备及场内外运输道路,以利土方开挖工作连续快速完成。
2.  沟槽开挖方法:
(1).  土方开挖采用放坡开挖,放坡系数为1:0.5,喷射10cm厚素混凝土硬化坡面。
(2).  开挖方式以机械开挖为主,人工开挖进行配合。土方采用分段分层开挖的方式进行,开挖深度3.0m以内的采用挖掘机一次开挖至距沟槽底20.0cm,开挖深度超过3.0m的,采用挖掘机分两次开挖至距沟槽底20.0cm,挖出的土方用自卸运土车运至指定余泥堆场。
(3).  沟槽基底标高以上20cm的土层,采用人工开挖、清理、平整,以免扰动基底土,严禁超挖。
(4).  沟槽开挖过程中,不同土层面标高须报验监理、业主确认,并做好记录。
(5).  土层与设计不符时,及时通知设计、监理单位,由设计、监理及施工单位共同商讨处理方法。
3.  沟槽排水措施:
(1).  在沟槽外设置排水沟和集水井,截止沟槽外地表水流入沟槽,集水井内的污水经沉淀后排放。
(2).  开挖时基底设置临时排水沟,排水沟的截面尺寸为200mm×300mm,沿着临时排水沟每隔20m设置600mm×600mm×800mm的集水井,采用潜水泵把集水井的水抽出沟槽外
(3).  在沟槽开挖过程中出现的渗漏水应及时进行处理,处理的方法为:
A.  渗漏水较少时,直接封堵;
B.  渗漏水较大时,在沟槽外侧施工摆喷或灌浆止水。
4.  开挖后的土方如达到回填质量要求并经监理确认后应用于填筑材料,不适用于回填的土料弃于业主、监理指定地点。
(转下页)
Cards on the table contents:
1, earth excavation:
1. Trench excavation preparatory work before:
(1). According to the design drawings of the design requirements for measuring and setting out, set the Pile, groove edges.
(2). The first paragraph to identify the underground excavation of underground pipelines and other structures in the situation, together with relevant departments to provide appropriate treatment to ensure the construction safety
(3). Trench excavation should be prepared prior to the drainage trench around the outside work to ensure that surface water does not flow outside the trench.
(4). According to project monitoring requirements, layout of various types of excavation prior to the observation point, and the determination of the initial data.
(5). Ready for all the mechanical equipment and OTC road transport to facilitate the rapid completion of a continuous earth excavation work.
2. Trench excavation methods:
(1). Earthwork excavation by sloping excavation, up slope coefficient of 1:0.5, jet 10cm thick plain concrete hardening slope.
(2). Excavation by mechanical excavation of the main excavated to meet. Sub-layer earth by way of excavation, the excavation depth of less than 3.0m with an excavator from the trench excavation to the end of 20.0cm, excavation deeper than 3.0m, the use of excavators digging in two to from the trench bottom 20.0cm, earthwork excavated earth with dump trucks to the named Yuni yard.
(3). Trench 20cm above the basement level of the soil, using artificial excavation, clearing, leveling, to avoid disturbance of soil substrate, is strictly prohibited overbreak.
(4). Trench excavation, the different levels of soil test level shall be reported to the Commissioner, the owner recognized, and well recorded.
(5). Soil and design does not comply, promptly notify the design, supervision units, from the design, supervision and construction of the unit to discuss treatment.
3. Trench drainage measures:
(1). Set in a trench drain and set well outside the cut-off trench into the trench field surface water, catchment wells after the discharge of sewage by sedimentation.
(2). Excavating the basement when temporary drainage ditches, drainage ditches cross-sectional dimensions of 200mm × 300mm, 20m to set up temporary drains every 600mm × 600mm × 800mm set of wells, wells with submersible pumps the water out of Baji outside groove
(3). In the groove leakage occurred during excavation should be disposed of water, treatment methods are:
A. less leakage of water, the direct closure;
B. water leakage is large, the construction placed in a trench outside the spray or grouting sealing.
4. Excavation to backfill of earth, such as quality requirements and confirmed by the Commissioner of filling material used, does not apply to the backfill soil material abandoned in the owner, supervision and designated locations.
(Next page)
 

帮助 收藏 报错 评论>>
综合管沟沟槽开挖、回填施工技术交底下载
点击此处下载