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1、浙大网新(淮安)科技园地下室土方开挖专项施工方案 编制人: 职务: 负责人: 职务: 批准人: 职务: 华强建设集团有限公司年 月 日目录 一、 工程概况二、 土方开挖施工准备三、 施工机具四、 作业条件五、 操作工艺六、 质量目标七、 成品保护八、 应注意的质量问题九、 土方开挖质量保证措施十、 土方开挖安全保证措施十一、 土方回填土方工程施工方案1、 工程概况 本工程位于江苏省淮安市淮安高教园区内,西至淮安软件园一期,东至规划路北至枚皋路南至科技大道。 项目采用“三区一车轴,南低北高”的规划格局“三区是指:中区独栋联排办公,南区多层办公楼。 办公及配套商业:“一轴”是这地块中央贯穿南北的景
2、观轴线。 1. 功能分区中区为3-4层的独栋双拼办公楼,共28幢39户,采用组团式布局模式,半地下室为机动车库,非机动车库,库房及设备用房,中区组团标高比城市周边高1。5M。南区为5层商办综合楼,1-2F为配套商业,3-5F为大空间办公。二、土方开挖前施工准备1.测量放线及测量桩点的保护(1) 在基坑开挖之前,场内所有的红线桩及建筑物的定位桩,全部经规划部门测量核准。(2) 在场边道路及场内的临时设施上做好定位标记,以备观测。(3) 在基坑开挖前,根据施工图纸、建筑轴线位置放出土方开挖边线。(4) 所有的测量桩、红线点一经核实后,项目部就落实专人对其进行定期检查复核,以确保红线点的准确性。2.
3、夜间施工照明的准备土方开挖期间,施工用电主要是夜间照明;(1) 所有用电均可以从现场配备的配电箱内接引,通过手提移动配电箱引至土方开挖区域,但施工用电必须由值班电工专门负责,禁止操作工人随意更改、移动。(2) 整个施工现场的夜间照明通过用钢管架子架设安置的6个5KW大灯具提供照明。(3) 现场大门口,边坡位置均视情况放置一定数量的照明灯及散光灯和警戒灯。3.主要机具:挖掘机、平头铁锹、手推车、梯子、铁镐、钢尺、汽车,小线或20号铅丝等。4.作业条件:(1)土方开挖前,应摸清地下管线等障碍物,并应根据施工方案的要求,将施工区域内的地上、地下障碍物清除和处理完毕。 (2)建筑物或构筑物的位置或场地
4、的定位控制线(桩),标准水平桩及基槽的灰线尺寸,必须经过检验合格,并办完预检手续。(3)场地表面要清理平整,做好排水坡度,在施工区域内,要挖临时性排水沟。如地下水位过高,需要井点降水。(4)夜间施工时,应合理安排工序,防止错挖或超挖。施工场地应根据需要安装照明设施,在危险地段应设置明显标志。(5)熟悉图纸,做好技术交底。5.操作工艺5.1工艺流程:确定开挖的顺序沿灰线切出坑边轮廓线分层开挖修整槽边清底5.2确定边坡本工程实际最大开挖深度为-1.5m,工程土质较好,放坡系数确定为0.3。5.3根据基础和土质以及现场出土等条件,合理确定开挖顺序,然后再分段分层平均开挖。开挖大面积线型基坑时,沿坑三
5、面同时开挖,堆放坑边的土方应距坑边缘2m以外,高度不超过l.5m。5.4开挖后,在挖到距坑底50cm以内时,测量放线人员应配合抄出距基坑底50cm平线;基坑边每隔23m钉水平标高标志。在挖至接近坑底标高时,用尺或事先量好的50cm标准尺杆,随时以水平标高标志上平,校核坑底标高。最后由两端轴线(中心线)引桩拉通线,检查距坑边尺寸,确定基坑边标准,据此修整坑帮,最后清除坑底土方,修底铲平。5.5基坑、管沟的直立帮和坡度,在开挖过程和敞露期间应防止塌方,必要时应加以保护。在开挖坑边弃土时,应保证边坡和直立帮的稳定。当土质良好时,抛于坑边的土方(或材料)应距坑(沟)边缘2m以外,高度不超过l.5m。在
6、柱基周围、墙基或围墙一侧的堆土高度不大于1.0米。5.6开挖基坑的土方,在场地有条件堆放时,一定留足回填需用的好土,多余的土方应一次运至弃土处,避免二次搬运。5.7土方开挖一般不宜在雨天进行。否则工作面不宜过大。应分段、逐片的分期完成。雨天开挖基坑或管沟时,应注意边坡稳定。必要时可适当放缓边坡或设置支撑。同时应在坑外侧围土堤或开挖水沟,防止地面水流入。施工时,应加强对边坡、支撑、土堤等的检查。垫层外预留500宽操作面,操作面内挖排水盲沟,转角或高低差处不大于20M挖一集水井。集水井为直径500、深400土坑。盲沟为300宽、200深土槽,内填碎石,以免被掩埋并保证坡脚稳定。挖至基底时预留300
7、mm,人工紧随进行清槽,将清除的土方送至反铲半径之内带弃。为确保开挖时及时的排出地下水及地表水,在两端(长轴方向)处各设置一个集水井,方便日后排水。若开挖后遇雨水天气,应采用人工将基槽清理至与原基土土质相同的土层,再用低标号砼浇注至设计基底标高。6质量标准6.1保证项目:基坑和管沟基底的土质必须符合设计要求,严禁扰动。如果超挖,用低标号砼浇筑,做好隐蔽签证。6.2基坑土方允许偏差:(1)底面标高0-50mm(2)底面长宽不应小于设计尺寸7成品保护7.1对定位标准桩、轴线引桩、标准水准点、龙门板等,挖运土时不得碰撞,也不得坐在龙门板上休息。并应经常测量和校核其平面位置、水平标高和边坡坡度是否符合
8、设计要求。定位标准桩和标准水准点,也应定期复测检查是否正确。 7.2土方开挖时,应防止邻近已有建筑物或构筑物、道路、管线等发生下沉或变形。必要时,与设计单位或建设单位协商采取防护措施,并在施工中进行沉降和位移观测。7.3施工中如发现有文物或古墓等,应妥善保护,并应立即报请当地有关部门处理后,方可继续施工。如发现有测量用的永久性标桩或地质、地震部门设置的长期观测点等,应加以保护。在敷设地上或地下管道、电缆的地段进行土方施工时,应事先取得有关管理部门的书面同意,施工中应采取措施,以防损坏管线。8应注意的质量问题8.1基底超挖:开挖基坑均不得超过基底标高。如个别地方超挖时,其处理方法应取得设计单位的
9、同意,不得私自处理。8.3基底未保护:基坑开挖后应尽量减少对基土的扰动。如基础不能及时施工时,可在基底标高以上留出0.3m厚土层,待做基础时再挖掉。8.4施工顺序合理;土方开挖宜先从低处进行,分层分段依次开挖,形成一定坡度,以利排水。8.5开挖尺寸:基坑或管沟底部的开挖宽度,除结构宽度外,应根据施工需要增加工作面宽度。如排水设施、支撑结构所需的宽度,在开挖前均应考虑。8.6基坑或管沟边坡:应加强检查,随挖随修,并要认真验收,保证基底平整,坑壁顺直。9土方开挖质量保证措施:(1)开工前要做好各种技术准备和技术交底工作。施工技术人员(工长)、测量人员要熟悉图纸,掌握现场测量桩及水准点的位置尺寸,办
10、理验桩、验线手续。(2)施工要配备测量人员进行质量控制。要及时复测灰线,基坑开挖下口线测放到基坑底。及时控制开挖标高,做到5m范围内挖土工作面标高控制桩不少于2个。(3)认真执行开挖样板制,即凡重新开挖边、坡坑底时,由操作技术较好的工人开挖一段时间后,经测量人员或质检人员检查合格后作为样板,继续开挖。施工人员换班时,要交接挖深、边坡、操作方法,以确保开挖质量。(4)认真执行项目部制定的技术、质量管理制度。施工中要积累技术资料,如施工日记、设计变更洽商、验桩、验线记录等。10.安全保证措施:(1)开工前要做好各级安全交底工作。根据工程土质条件以及运土路线等特点,制定安全措施,落实安全责任、组织职
11、工贯彻落实,并定期开展安全活动。(2)如运土车辆需进出大门时应有专人检查车轮是否带泥,并及时清理和做好大门口的清洁工作。(3)工地全封闭施工,大门口设洗车场、排水沟、集水池,车辆出场时必须冲洗干净,方准离开工地,不准将污泥带出门外,影响市容。(4)夜间挖土施工时,应配置足够的灯光照明。(5)为预防边坡塌方,一般禁止在边坡上侧堆土,当在边坡上侧堆置材料及移动施工机械时,应距离边坡上边缘0.8m以外,材料堆置高度不得超过1.5m。土方回填一、土方回填前的准备 1、回填料的确定 本工程回填料主要利用本工程开挖料,留足回填料。工程师认为不合格的填筑料一律不得使用。 2、标准击实试验 土方回填料确定后,
12、项目部质检员、抽样员邀请监理工程师共同在回填料场进行取样,抽取的土样应具有代表性,各个土层和性状的土都应包括。土样抽取后送实验室做标准击实试验,确定最优含水率下的最大干密度。通过实验作出土方回填料的最优含水率、最大干密度。 3、现场碾压试验 标准击实试验完成后,即在施工现场安排夯实试验。夯实试验的目的:(1)、核查土料压实后是否能够达到设计压实干密度值;(2)、核查压实机具的性能是否满足施工要求;(3)、选定合理的施工压实参数:铺土厚度、土块限制粒径、含水量的适宜范围、压实方法和压实遍数;(4)、确定有关质量控制的技术要求和检测方法。 碾压试验在标定的回填区域分别进行,蛙夯夯实遍数从4遍开始用
13、环刀法抽取试样,测定干密度值,达不到要求再夯实6遍、8遍测定直到合格。4、施工前技术交底 土方回填前,由技术部向作业班组质检员进行详细的技术交底,将回填区域进行划分、根据碾压试验确定的压实参数、施工方法等问题交代清楚。 二、施工部署 本工程回填按施工段的施工顺序进行,为适应主体建筑物的施工及满足建筑物回填需要达到的条件,按每施工段为一填筑段,其填筑速度与建筑物施工速度相匹配,回填作业连续进行。土方回填时,采取两种方案进行,即堆土区一侧采用装载机送土到基坑,另一侧采用小型挖掘机或人工填土,做到两侧同时回填均匀上升。 三、土方回填控制 土方回填过程中,根据试验确定的土料最佳含水量、摊铺厚度、夯实遍
14、数,对填筑过程进行严格控制。铺土厚度不允许超出经试验确定的铺土厚度。人工夯实按每层20cm一次性达到要求向前推进,在回填铺土夯实时其推进方向与轴线平行。在降雨前应及时压实作业面表层松土,并将作业面作成拱面或坡面以利排水,雨后应晾晒或对填土面的淤泥清除,合格后方可继续填筑。在整个回填过程中,设置专人保证观测仪器与测量工作的正常进行,并保护所埋设的测量标志完好。 四、质量检查 1、填筑前,首先对回填段进行地形、剖面的测量复核,并把测量资料报送工程师复检。其次对测量后的基坑进行基础面的清理,然后报工程师进行回填前的验收,验收合格后方可回填。 2、土方填筑时,对填筑段选派有经验的工程技术人员在现场填筑
15、中进行监督并密切配合监督人员的工作。 3、在土方填筑过程中,根据工程师批准的土方填筑检测计划对每层土进行检测,检测合格后把检测资料报送工程师并报请工程师进行抽检,复检合格并经批准后进行下一步土方的回填。 4、在堆土料场,不定期对土料的含水量进行检查,对于含水量较高的土料必须翻晒,待其含水量达到要求后方可进行回填。 5、在工程师检查后,对不合格的回填土,彻底按工程师的指示进行返工、修理和补强。 6、土方填筑完工后,首先对工程全部填筑部位按国家有关规范规程规定的有关内容进行自检,自检合格后报请工程师进行验收。 Opinions and suggestions on the partys mass
16、line educational practiceAccording to the central and provincial, municipal unified deployment, according to municipal Party committee about carrying out the partys mass line educational practice activity in the citys implementation opinions, the spirit of the partys mass line educational practice a
17、ctivities from 20* in January to 99 months, carried out at all levels of departments and directly affiliated institutions and grass-roots party organizations. According to my actual County, the county to carry out the education practice put forward the following implementation opinions.First, the ov
18、erall requirementsCounty county education practice to the eighteen Party of eight, the spirit of the the third Plenary Session of the 18th CPC Central Committee as the guidance, conscientiously implement the spirit of general secretary Xi Jinping book series of important speech, earnestly implement
19、the Central Committee really, opinions and advice , party implementing the guiding ideology of opinions to determine the objectives and requirements, step method, in accordance with the look in the mirror, dress up, wash bath, cure treatment, the general requirements of for the people pragmatic hone
20、st people as the theme, in carrying forward the spirit of Zhuanglang Zhuang, improve their work style, service to the masses of the people, the foundation of consolidating grassroots, promote transformation across efforts, to further implement the central eight regulations and The opposition party a
21、nd government austerity waste regulations , double section provincial regulations, municipal provisions of the twelve plan and the implementation measures for on improving the work style of close ties with the masses law, highlight style building, carry out the whole wind spirit, resolutely oppose f
22、ormalism, bureaucracy, hedonism and wasteful extravagance to solve the problems, Party members and cadres of the style and the masses of people strong, the Ministry of Party members and cadres to further improve their thinking and understanding, to further change the style of the wind, the masses to
23、 close, honest and pragmatic people honest image to further establish the foundation to further reinforce the basic level. Style of the building of the new results to promote the construction of a powerful force of the county and the ecological culture of the county and county construction.In educat
24、ional practice activities of the unit is mainly: the county and below county departments under the organs, enterprises and institutions directly under the township, street, and community, village, non-public economic organizations, social organizations and other grass-roots organizations. Agencies a
25、nd branches, each single unit, follow the rules on internal institutions. Educational practice with step by step.To adhere to the county leadership, leadership and leading cadres to focus on outstanding catch to directly contact the service of the masses of law supervision departments and window uni
26、ts, service industry, educational practice, pay attention to grasp the heavy towns, streets and villages, community education activities and the masses of grassroots groups in close contact to strengthen, and the majority of Party members, cadres and the mass line line Marx doctrine view of the mass
27、es and the partys education.Always speak seriously as a basic attitude, adhere to positive education, to carry out criticism and self criticism group, adhere to the pragmatic, more emphasis on leadership, pay more attention to the layers of the demonstration, more focus on the four winds, solve the
28、problem, pay more attention to open the door, the participation of the masses, pay more attention to the classification guidance. Orderly, pay more attention to the cooperation and cohesion driven, more strict requirements on injection, really supervision practice, ensure education practice is not e
29、mpty is not empty is not partial, not as a mere formality.Two, the key point of the taskThe main task of the countys education practice is to seize against four wind this focus on centralized solve outstanding problems asked County, township leadership and leading cadres of the four winds, the disad
30、vantages of the style, scale behavior to a large scale investigation, overhaul, cleaning greatly. At the same time, respond to the concerns of the masses, safeguard the interests of the masses, pay attention to solve practical problems, solve the people around the unwholesome tendencies especially o
31、n eat, take the card, Yong lazy luxury, extravagance and waste fees, privileges and other issues, timely and effective, without any discount to solve, to improve the style of real implementation of the requirements of real to the grassroots, real let group Benefit the public.(a) focus on solving the
32、 four winds outstanding issuesThe central and provincial requirements, the county leadership and leading cadres of key performance concept is not correct, do not dare to play, to engage in image project, political project, a leadership guide, a set of ideas, orders and prohibitions, and a policy, th
33、ere are countermeasures county. The units directly under the heavy focus on solving Yung lazy drag, buck passing skin, work is not implemented, the service is not active. The dynamic problem of law enforcement and supervision departments and window units, service industry mainly solve the door hard,
34、 ugly face, something difficult, and arbitrary charges, fines, levies, and breach of privilege, chinakayao, not the problem of law. The township, street The collar of leading bodies and leading cadres to solve key does nottheir own conditions to develop the correct road, the maximum to avoid investm
35、ent risk, gain profit.(three) vigorously promote the brand. To establish brand awareness, awareness of the use of brand, brand value, brand acquisition performance, enhance the competitive strength. Concentrated manpower, careful planning, packaging and publicity of a number of unique, market influe
36、nce and coverage of the brand, the implementation of key breakthroughs, to enhance the competitive strength, walking business road the competition of alienation and characteristics, the pursuit of stability and development of the market.(four) to promote the integration of resources. To further broa
37、den their horizons, effective integration of resources within the group, the city resources, other industries and regional resources, mutual trust, mutual benefit, seeking win-win principle, in the framework of national policies and regulations, strict inspection and argumentation, legal consultatio
38、n, examination and approval procedures, strict regulation of economic activities, attract injection the social investment to the industry group, to achieve leveraging the development, ensure that the value of state-owned assets.(five) to strengthen the construction management personnel. Strengthen t
39、he management of education and training of cadres and workers of the existing business, firmly establish the concept of the market, enhance the sense of crisis to adapt to market competition, the sense of urgency, improve the ability to respond to market competition, improve management and operation
40、 of the market. At the same time, according to the need of industrial development, vigorously the introduction of high-quality management management personnel, and strive to build a high-quality professional management team, hard work, and promote the entire workforce knowledge structure, age struct
41、ure, structure optimization and upgrading ability, enhance core competitiveness, adapt to the need of market competition.(six) seriously study the policy for policy. Serious research about social support the development of cultural undertakings in the country and the XX policy, especially the policy of industrial development, financial investment policy, financial policy and tax policy, and actively seek policy, projects and funds, enterprise and industry group mission to promote leapfrog development.
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