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TECHNICAL SCHEME OF FOUNDATION DITCH & EARTHWORK CONSTRUCTION 总目录 TABLE OF CONTENTS 一、工程概况Project Overview 二、编制依据Basis of Preparation 三、工程场地地质条件 Engineering geological conditions 四、基坑围护结构设计概况 A profile of foundation pit retaining structure design 五、施工部署 Construction of the deployment 六、施工方法和技术措施 Construction methods and technical measures 七、质量保证措施 Seven, quality assurance measures 八、安全保证措施 Eight safety measures 九、保洁措施 Cleaning measures 部分章节示例如下： 四、基坑围护结构设计概况 A profile of foundation pit retaining structure design 本工程基坑围护不采取放坡，只采取钢板桩进行支护和轻型井点降水的围护方案。 This engineering foundation pit retaining do not take put slope, only take the steel sheet pile in supporting and light well point precipitation palisade scheme. 4.1土方开挖做法 Earthwork excavation practice 土方开挖应先大面积挖至各工号基础基底标高，，为确保各工号工程桩的稳定性，待各工号的钢板柱支护完成后，再进行二级深度开挖，并及时通知监理、业主、勘察单位进行验收，对基础垫层进行浇注。 Earthwork excavation should be large dig to the working of basal level, and in order to ensure the stability of the working engineering pile, stay after completion of the work number plate column support, then the secondary excavation depth, and timely notify supervision, owners and acceptance prospecting units, the casting was carried out on the foundation pad. 土方开挖的基底标高应结合结施图进行，基坑土方开挖应分层分段进行，每层开挖深度不得超过2.7 m，开挖长度不得大于60m。 最后20cm土方及地梁、承台等局部深处宜人工开挖，尽量减少对坑底土的扰动，严禁超挖。挖土至坑底标高后应分块施工并在72小时内完成素混凝土垫层，并抓紧施工基础底板。Earth excavation of basement level should be combined with knot figure, earth excavation of foundation pit should be layered segments, shall not be more than 2.7 m, each layer excavation depth excavation length shall not be greater than 60 m. Last 20 cm earthwork and ground beam, caps and other local appropriate artificial excavation depth, try to reduce the disturbance of bottom soil, it is strictly prohibited to dig. Should be block construction after digging to the bottom elevation and within 72 hours to complete the plain concrete cushion, and grasping the construction foundation slab. 4.2钢板桩施工方法 Steel sheet pile construction method ⑴、基线确定：施工员在基坑边上定出轴线，留出以后施工需要的工作面，确定钢板桩施工位置。参照设计要求（SLIC-cMDI2-CP02）。 ⑵、定桩位：按顺序标明钢板桩的具体桩位，洒灰线标明。 ⑶、钢板桩施打： (1)Baseline to determine: the builder set axis on the edge of the foundation pit, set aside after the construction needs of the working face, determine the position of steel sheet pile construction. With reference to the design requirements (SLIC - cMDI2 - CP02). Diction, pile location: the order clearly indicate the concrete pile, steel sheet pile with grey line marked. (3)Steel sheet pile type: 第一根钢板桩插打：吊起钢板桩，打开机头夹板夹住桩头，垂直后在设计位置通过打桩机的液压振动锤将钢板桩插入至设计深度。 后续钢板桩插打：第一根桩打插完成以后，后续钢板桩沿前一根桩的扣槽插入至设计深度。 First root steel sheet pile inserted: hoist steel sheet pile, open the nose clips pile head splints, after the vertical design position through the hydraulic vibration hammer pile-driver insert steel sheet pile to design depth. Subsequent steel sheet pile in play: after the completion of the first root pile inserted, subsequent steel sheet pile along the former a buckle groove insert to the design depth of the pile. 在钢板桩施工中，打设的允许误差为：桩顶标高偏差±100mm，钢板桩轴线偏差±100mm，钢板桩垂直度偏差为1%；在打设过程中，应监测是否在允许误差范围内，超出时及时纠正。 During the construction of steel sheet pile, the play of permissible error is: the pile top elevation deviation plus or minus 100 mm, the steel sheet pile axis deviation plus or minus 100 mm, steel sheet pile verticality deviation is 1%; In the process of play set, whether should be monitored within the scope of permissible error, beyond the correct in time. 施工管理网络 Construction management network 5.1.2组织管理 Organization Management ①建立以项目经理为中心的质量管理目标和职责体系，现场技术负责人、施工员、观砌、质量具体实施质量管理，对施工质量进行交底、检查、监督，全面协调各专业施工单位的配合工作。 ① Establish a project manager for the center's quality management system objectives and responsibilities, technical director of site, construction workers, the concept of the puzzle, the quality of the specific implementation of quality management, quality tests, construction, inspection, supervision, and overall coordination of the professional construction unit jobs. ②严格审查专业分包单位资质，如实掌握其施工力量、施工经验，达不到要求的禁止其进场施工。 ③坚持对作业人员的持证上岗制度的检查，特别是电焊工、挖掘机司机等特殊工种持证上岗的检查。 ② Scrutiny of professional qualifications subcontractors, truthfully grasp its power and construction experience construction, mainly the prohibited entering the construction. ③ Adhere to the examination of the system of certificates of workers, particularly welders, excavator drivers, and special types of certificates of inspection. 5.3施工准备工作 Construction preparation work 5.3.1测量工作Measurement work 根据建设单位提供的坐标点及水准基点进行定位放线，遵循“从整体到局部”的原则，建立施工平面测量控制网，在现场选择便于观测又较为永久稳固的地点设置若干个水准高程测量控制点，做好轴线控制点和高程控制点的保护工作。 According to the construction units to provide the coordinates of the point and benchmark for positioning line and follow 'from the whole to the local' principle, building construction plane surveying control network, the in site selection for observation and more secure permanent place setting some level of elevation measurement control, do good axis control point and elevation control points of the protection work. 5.3.2水平运输设备 Horizontal transport equipment 根据施工顺序，在土方开挖前先准备好基础施工过程中所有材料，特别是进场前对挖机、运输车、装载机等各种机械设备进行检修，建立现场仓库机具管理体系，确保机械设备的完好率。做好施工机械的检修、保养工作，确保机械设备运转正常。 According to the construction sequence, before the excavation to foundation construction process in all materials, especially before the approach of digging machines, transportation vehicles, loaders, etc. all kinds of machinery and equipment maintenance, establish the site warehouse equipment management system, ensure the integrity rate of the machinery and equipment. Do the construction machinery repair, maintenance work, to ensure the normal operation of machinery and equipment. 5.3.3施工道路及清理 Road construction and clean up 各基坑施工时沿坑顶排水沟设置施工道路，施工道路宽5m。沿各基坑周边设置人行斜道，人行斜道供基坑作业时人员上下使用。人行斜道采用钢管搭设，斜道与基坑水平面成60°夹角，并设置防滑设施。施工机械、设备、周转材料提前进场。 The gutter along the pit when foundation pit construction on top set construction roads, construction road 5 m wide. Along each set around the pedestrian chute, the pedestrian ramps for foundation pit homework personnel use the up and down. Pedestrian ramps set-up, the adoption steel pipe chute and foundation pit horizontal Angle 60 °, and set the anti-slip facilities. Construction machinery and equipment, turnover materials in advance. 基坑内设置临时汽车运输坡道，坡道宽10米，路面采用30cm建筑垃圾填筑夯实，再铺设道板，坡道两边及采用45度1:1.2放坡，正面出土坡道采用1：3放坡，土层用挖机夯实，在土方开挖施工时，要定时对汽车坡道进行检查，防止坡道土方松散、出现滑坡现象。 Set up temporary motor transport ramp, inside of the foundation pit slope 10 meters wide, the road by 30 cm compaction, construction waste reclamation again laid but, on both sides of the ramp and USES 45 degrees of 1:1. 2 put slope, positive slope excavated slope using 1:3, the soil, with drivers to consolidate during earth excavation construction, regular inspection on ramp, to prevent the occurrence of landslides ramp earthwork loose and phenomenon. 5.3.4临边围护Limb enclosure 施工现场配备必要的堵漏设备和材料、排水设备、砂包、钢管、木材等以备急需。土方开挖后，及时做好基坑的临边围护工作，采用黄黑油漆涂刷钢管，围护高1.2米，立杆间距3米，进行封闭，悬挂安全警示标语。 Equipped with necessary plugging equipment and materials to the construction site, drainage equipment, sand bags, such as steel tube, wood for a rainy day. Earthwork excavation, do a good job in the side of the foundation pit retaining in time, using black paint coating steel pipe, retaining high 1.2 meters, the vertical bar spacing of 3 meters, closed, hanging safety warning signs. 6.1.2.6围檩、拉杆Purlin, rod 为加强钢板桩墙的整体刚度，沿钢板桩墙全长设置围檩，围檩用30号槽钢焊接在钢板桩上。围檩槽钢设置两道，钢板桩顶部一道，基坑支护钢板桩中部一道。 To strengthen the overall stiffness of steel sheet pile wall, along the total length of steel sheet pile wall set around the purlin, wai purlin with 30 channel steel welded on the steel sheet pile. Wai purlin steel channel set two way, steel sheet pile top, foundation pit supporting steel sheet pile in the middle of a. 拉杆采用Ф25钢筋，用电焊焊接，一端焊接在钢板桩槽钢围檩上，另一端固定在后端6m处打入地底的钢板柱上，每3根拉结的钢筋固定在后端一根钢板柱上。 Rod using Ф 25 reinforced with welded wire welding, the welding on the steel sheet pile channel steel purlin around at one end and the other end fixed on the back end into the underground steel column on 6 m place, every three root Rachel steel bar fixed on the back end of a pillar of the steel plate. 6.1.3.2.3 井点管的使用 The use of well point pipe 井点使用时，应保证连续不断地抽水，并准备双电源。正常出水规律是“先大后小，先浑后清”。井点降水时，应对水位降低区域内的建筑物进行沉陷观测，发现沉陷或水平位移过大时，应及时采取防护技术措施。 Well point when using, should guarantee the continuous pumping, and prepare to double power supply. After the normal rule is 'first big small, muddy before qing dynasty'. Well point precipitation, dealing with water level reduce the buildings in the area of subsidence observation, found that the subsidence and horizontal displacement is too large, measures should be take timely protection technology. 6.1.3.2.4 除降水措施外，地面及坑内应设排水措施，及时排除雨水及地表流水。坑内排水不得采用在坑边挖沟方式。 6.1.3.2.4 besides rainfall measures, and shall have the pit drainage measures on the ground, in a timely manner to eliminate rain water and surface water. Pit drainage shall not adopt in pit digging ditches. |
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