wj沉渣池降水及护坡方案.doc

【精品文档】如有侵权，请联系网站删除，仅供学习与交流wj沉渣池降水及护坡方案.精品文档.实联化工（江苏）有限公司热电厂循环水旁滤系统回收泵池施工方案基坑围护管井降水施工方案编制人: 职务： 校对人： 职务： 审核人： 职务： 审批人： 职务： 编制时间： 2014 年 3 月 27 日目 录一、工程概况（1）施工依据（2）施工原理设计方案二、基坑管井降水方案三、基坑围护施工方案四、降水排水措施五、文明施工措施一、工程概况：实联化工（江苏）有限公司热电厂循环水旁滤系统回收泵池工程位于于淮安市台玻大道西侧，盐北路南侧。基坑开挖深度为自然地面以下-4.5m，为了缩短基坑施工工期，节约工程造价，并确保工程质量和基坑边坡及相邻管道、建筑物、暖气沟的安全稳定，经过综合经济技术比较，边坡采用槽钢20a支护的施工工艺，形成对基坑边坡实施围护。采用深井降水降低水位，地面及基坑内设明沟及集水井，以排除雨水及地面集水。建设单位：实联化工（江苏）有限公司 施工单位：江苏江都建设集团有限公司 （一）施工依据1、规范及规程a、国家标准建筑基坑支护技术规程JGJ120-99b、国家标准建筑地基基础工程施工质量验收规范GB50202-2002c、国家标准混凝土工程施工质量验收规范GB50204-20022、施工场地较为狭小，周边有重要的建筑物和管线、电缆，地形较平坦。（二）施工原理设计方案1、为了降低工程成本及有效的降低地下水位和防止土方坍塌，根据施工现场的实际情况，考虑到基坑小，施工周期较短，决定在基坑外围东西两侧各设置一口深井进行布置，考虑到基础深度4.8米，管井深度控制9m，以便更好的降低地下水位；回收泵池北侧3m有循环水泵房管道，南侧1.6m有化学水处理室暖气沟，所建水池四周土质为后回填土，决定边坡采用槽钢20a支护，具体见附页平面图。2、基坑外边缘3米内不准堆放任何材料，并做好防护栏杆。二、基坑管井降水方案1、方案的确定（1）管井降水应其特殊性多数用于基础无法放坡大开挖、土层渗透系数大、开挖深度比较深或隔层土比较多及面积跨度大的工程中使用，所以本工程应用管井要比轻型井点降水深的深，面积大得多，轻型井点降水属于强制性降水，是依靠真空抽水方法达到降水目的，而管井降水是依靠自然渗透的方法达到降水目的，属于非强制性降水，管井中仅需放入一台相应的高扬程水泵，抽出管井中渗透水即可。（2）根据图纸设计所知基础采用是筏板基础，基础工程为地下一层（满堂），建筑物为长方形,开挖面积小，为确保降水一次性成功，本次工程深度4.8米，施工时钻孔12米（因每口井内有0.5米-1米的沉淀区，井底有1米添滤料区）。根据以上所得管井施工深度为12米，间距根据渗透系数定为12米能有效阻止水的渗透），布置位置见<<降水平面布置图>>，共计总数为2口井，使每个点面都能达到降水效果。（3）观测井设置：在基坑外最长方向共设1个观测管井，不作抽水使用，派专人每天二次记录水位变化情况。2、施工材料、人员及具体尺寸（1）本次深井降水施工，施工钻孔孔径为550mm-650mm（因钻杆有一定的摆动幅度，所以钻头只需450mm-550mm的即可）,井管材料外径为315mm,内径为300mm，长度为6000mm的PVC波纹管，其它管材如水泥、无砂管等价格较高或施工不便不适宜选用。PVC波纹管管与管之间本身就有连接口，在连接时用胶带密封住，用铅丝扎紧及可，此方法速度快，成本低，在加工时渗透眼打在波纹与波纹之间的间隙处，让滤料与渗透眼分离，无堵塞现象发生，增加渗透速度，所以本次降水方案材料采用PVC波纹管。（2） PVC波纹管在管身波纹与波纹之间用10号钻头，每隔100mm布置渗透眼，打孔过后在管身上面用60膜的尼龙网布用塑料线均匀掴在滤管上, 滤料采用5#-10#的瓜子片灌砂到地面向下米处，上面用自然土回灌至地面（3）本次管井降水施工时采用滨洲150J小型钻机壹台套及其它配套设备，根据总体施工组织设计结合现场情况。施工工期计划3日内完成。3、管井降水施工工序根据图纸和施工要求放线定位安装机械设备及水泵进出水管现场施工人员5名，1名工作人员负责操作机械设备，2名工作人员负责泥浆打捞及清理。2名工作人员负责PVC波纹管打孔及下管摆放，滤料填实及自然土的回填。在施工中要防止孔口塌陷，如发生塌陷现象用粘土将孔口填实重新施工。摆放PVC波纹管时四周用扶正木扶正，确保PVC波纹管成垂直下放线。管井安装结束后，在每口管井中及时放入1100瓦高扬程水泵抽水，按合作方要求排放到指定地点，并安排1名工作人员值班，确保降水达到施工要求。并且在原有水泵数量的情况下多准备1100瓦高扬程水泵贰台，以便在抽水设备出现问题时及时替换。管井抽水的地下水含泥量不超过5-10%4、管井施工注意事项（1）本次工程采用滨洲150J小型钻机,设备总功率为20千瓦/小时,每台抽水用高扬程水泵功率为1100瓦/小时,共10台，深井设备正常运转使用当中要注意供电设施的配套应用。（2）有保证供电的过续性（不能断电超过2小时，特别是开挖后），否则前功尽弃。5、特别注意问题（1）、管井降水需24小时不间断抽水，抽水设备一旦停止，地下水会立即从基础四周的施工工作面中涌上来，轻者土建队伍无法施工，重者导致基础底板变形、开裂、上浮等破坏性结局。（2）、管井安装位置须符合总的基坑围护设计方案；（3）、管井安装时应按总平面及土建施工图纸尺寸；（4）、拟采用井点设备供电配套应用及安全，应符合安全生产条例和有关安全规定。三、基坑围护施工方案1、基坑支护工程工艺：槽钢的打设虽然在基坑开挖前已完成，但整个槽钢桩支护结构需要等地下结构施工和回填完成后，在许可的条件下将板桩拔除才算完全结束。因此，对于槽钢桩的施工应考虑打设、挖土、支撑、地下结构施工、回填、支撑拆除及板桩的拔除。测量放线及地下障碍物清理打槽钢桩土方开挖内支撑安装基坑底设计标高钢筋砼底板与池壁施工回填土方槽钢桩拔除2、施工准备2.1清理障碍物和场地平整障碍物分为地面障碍物和地下障碍物。地面障碍物有管道、绿化带及人行道。按照建设单位要求进行拆除，垃圾应及时处理，严禁就地堆放。地下障碍物为生活给水管和消防管及其它未勘明的物体。地下管道严格按照建设单位提供的前期资料进行勘明和标注，人工配合机械挖土，进行管道改建，将管道移到施工区域以外。2.2定位放线现场设置围护轴线控制点，并投射到墙上或其它坚固物体上，便于施工阶段经常复核，并注意在施工作业时加以保护。2.3技术准备熟悉、审查施工图纸及有关技术文件；2.4施工物资的准备槽钢及施工机械均进入场地。施工管理人员根据工程需要，确定各阶段对材料，施工机械、设备，工具等的需要量，及时安排运输及进出场，使其满足连续施工的要求。安排进场材料、构件及设备的堆放地点，并严格验收，检查以及核对数量和规格；进场的材料等质保资料必须齐全。2.5施工队伍准备施工前对施工队伍进行劳动纪律的安全教育；做好职工、技术人员的培训和更新工作，提高职工的业务技术水平。3、槽钢的打设 施工机械采用挖机打桩。槽钢从一角开始逐块插打，直至工程结束，这种打入方法施工简便，可不停顿地打，挖机行走路线短，速度快。但单块打入易向一边倾斜，误差积累不易纠正，墙面平直度难控制。四、降排水措施开工前应修好边坡上各种冲洗用水的下水通道，以免上边的水浸入边坡或流入基坑，基坑内位置设置一个集水井，基坑上口四周及底部四周挖30*50cm深的排水沟，在接入市政官网前设沉定池，确保没有泥沙进入市政管网，及时把作业面的水导入沟内、井内抽干。雨天更要及时排除积水，减少基坑的浸泡时间，配备2台中型抽水泵及时将槽底集水井的水排入沉定池。五、文明施工措施完善技术和操作管理规程，确保邻近建筑及管线安全。运用其它有效方式，减少施工对绿化、环境的不良影响。场地上设立专职调度员，对运输建材、垃圾、渣土的车辆进行全面安排，统一调度。保证施工现场道路通畅，便于施工顺利进行。车辆出场前对车轮等易造成污染部分进行冲洗，保证泥土不带到路面上。成立专门清洁班，每天对施工场地进行清洁。（英文版 ） Two regulations promulgated for implementation is in the party in power for a long time and the rule of law conditions, the implementation of comprehensive strictly strategic plan, implementation in accordance with the rules and discipline to manage the party, strengthen inner-party supervision of major initiatives. The two regulations supporting each other, the < code > adhere to a positive advocate, focusing on morality is of Party members and Party leading cadres can see, enough to get a high standard; < rule > around the party discipline, disciplinary ruler requirements, listed as "negative list, focusing on vertical gauge, draw the party organizations and Party members do not touch the" bottom line ". Here, the main from four square face two party rules of interpretation: the first part introduces two party Revised regulations the necessity and the revision process; the second part is the interpretation of the two fundamental principles of the revision of laws and regulations in the party; the third part introduces two party regulations modified the main changes and needs to grasp several key problems; the fourth part on how to grasp the implementation of the two regulations of the party. < code > and < Regulations > revised the necessity and revised history of the CPC Central Committee the amendment to the Chinese Communist Party members and leading cadres honest politics several guidelines > and < Chinese Communist Party discipline and Punishment Regulations > column 1 by 2015 to strengthen party laws and regulations focus. Two party regulations revision work lasted a Years, pooling the wisdom of the whole party, ideological consensus, draw historical experience, respect for the wisdom of our predecessors, which reflects the unity of inheritance and innovation; follow the correct direction, grasp the limited goals, adhere to the party's leadership, to solve the masses of the people reflect a focus on the problem. The new revision of the < code > and < rule >, reflects the party's 18 and the eighth session of the third, the spirit of the fourth plenary session, reflecting the experience of studying and implementing the General Secretary Xi Jinping series of important speech, reflects the party's eighteen years comprehensive strictly practice. (a) revised two regulations of the party need of < the ICAC guidelines > in < in 1997 Leaders as members of the Communist Party of China clean politics certain criteria (Trial) > based on revised, the promulgation and implementation of January 2010, to strengthen the construction of the contingent of leading cadres play an important role. But with the party to manage the party strictly administering the deepening, has not been able to fully meet the actual needs. Content is too complicated, "eight prohibition, 52 are not allowed to" hard to remember, and also difficult to put into practice; the second is concisely positive advocated by the lack of prohibited provisions excessive, no autonomy requirements; the third is banned terms and discipline law, both with the party discipline, disciplinary regulations repeat and Criminal law and other laws and regulations repeat; the fourth is to "clean" the theme is not prominent, not for the existing problems, and is narrow, only needle of county-level leading cadres above. < rule > is in 1997 < Chinese Communist Party disciplinary cases (Trial) > based on revision, in December 2003 the promulgation and implementation, to strengthen the construction of the party play very important role. Along with the development of the situation, which many provisions have been unable to fully meet the comprehensive strictly administering the practice needs. One is Ji law, more than half of the provisions and criminal law and other countries laws and regulations Repetition; two is the political discipline regulations is not prominent, not specific, for violation of the party constitution, damage the authority of Party Constitution of misconduct lack necessary and serious responsibility to pursue; third is the main discipline for the leading cadres, does not cover all Party members. Based on the above situation, need to < the criterion of a clean and honest administration > and < rule > the two is likely to be more relevant regulations first amendment. By revising, really put the authority of Party discipline, the seriousness in the party tree and call up the majority of Party members and cadres of the party constitution of party compasses party consciousness. (II) two party regulations revision process the Central Committee of the Communist Party of China attaches great importance to two regulations revision . Xi Jinping, general books recorded in the Fifth Plenary Session of the eighth session of the Central Commission for Discipline Inspection, on the revised regulations < > made clear instructions. According to the central deployment, the Central Commission for Discipline Inspection from 2014 under six months begin study two regulations revision. The Standing Committee of the Central Commission for Discipline Inspection 4 review revised. Comrade Wang Qishan 14 times held a special meeting to study two regulations revision, amendment clarifies the direction, major issues of principle, path and target, respectively held a forum will listen to part of the province (area) secretary of the Party committee, Secretary of the Discipline Inspection Commission, part of the central ministries and state organs Department The first party committee is mainly responsible for people, views of experts and scholars and grassroots party organizations and Party members. Approved by the Central Committee of the Communist Party of China, on 7 September 2015, the general office of the Central Committee of the Party issued a notice to solicit the provinces (autonomous regions, municipalities) Party, the central ministries and commissions, state ministries and commissions of the Party (party), the General Political Department of the military, every 3 people organization of Party of two regulations revision opinion. Central Commission for Discipline Inspection of extensive solicitation of opinions, careful study, attracting, formed a revised sent reviewers. In October 8 and October 12, Central Committee Political Bureau Standing Committee and the Political Bureau of the Central Committee After consideration of the two regulations revised draft. On October 18, the Central Committee of the Communist Party of China formally issued two regulations. Can say, two laws amendment concentrated the wisdom of the whole party, embodies the party. Second, < code > and < Regulations > revision of the basic principles of two party regulations revision work and implement the party's eighteen, ten eight plenary, the spirit of the Fourth Plenary Session of the Eleventh Central Committee and General Secretary Xi Jinping important instructions on the revised < low political criterion > and < Regulations >, highlighting the ruling party characteristics, serious discipline, the discipline quite in front of the law, based on the current, a long-term, advance as a whole, with Bu Xiuding independent < rule > and < rule >. Main principle is: first, adhere to the party constitution to follow. The constitution about discipline and self-discipline required specific, awaken the party constitution of party compasses party consciousness, maintaining the authority of the constitution. General Secretary Xi Jinping pointed out that "no rules, no side round. Party constitution is the fundamental law, the party must follow the general rules. In early 2015 held the eighth session of the Central Commission for Discipline Inspection Fifth Plenary Session of the 16th Central Committee, Xi Jinping again pointed out that constitution is the party must follow the general rules, but also the general rules." the revision of the < code > and < rule > is Method in adhere to the regulations established for the purpose of combining rule of virtue is to adhere to the party constitution as a fundamental to follow, the constitution authority set up, wake up the party constitution and party rules the sense of discipline, the party constitution about discipline and self-discipline specific requirements. 4 second is to adhere to in accordance with the regulations governing the party and the party. The Party of rule of virtue "de", mainly refers to the party's ideals and beliefs, excellent traditional style. The revised the < code > closely linked to the "self-discipline", insisting on the positive initiative, for all members, highlight the "vital few", emphasized self-discipline, focusing on the morality, and the majority of Party members and the ideological and moral standards. The revised < > Ji method separately, Ji, Ji Yan to Method, as a "negative list", emphasizing the heteronomy, focusing on vertical gauge. Is this one high and one low, a positive reaction, the strict party discipline and practice results transformation for the integration of the whole party to observe moral and discipline requirements, for the majority of Party members and cadres provides benchmarking and ruler. Third, insist on to. In view of the problems existing in the party at the present stage, the main problems of Party members and cadres in the aspect of self-discipline and abide by the discipline to make clearly defined, especially the party's eighteen years strict political discipline and political rules, organization and discipline and to implement the central eight provisions of the spirit against the four winds and other requirements into Disciplinary provisions. Not one pace reachs the designated position, focusing on in line with reality, pragmatic and effective. After the revision of major changes, major changes in the < code > and < rule > modified and needs to grasp several key problems (a) < code > < code > adhere to according to regulations governing the party and party with morals in combination, for at the present stage, the leadership of the party members and cadres and Party members in existing main problems of self-discipline, put forward principles, requirements and specifications, showing Communists noble moral pursuit, reflected at all times and in all over the world ethics from high from low 5 common requirements. One is closely linked to the "self-discipline", removal and no direct relation to the provisions of . the second is adhere to a positive advocate, "eight prohibition" 52 are not allowed to "about the content of the" negative list moved into synchronization amendment < cases >. Three is for all the party members, will apply object from the leadership of the party members and cadres to expand to all Party members, fully embodies the comprehensive strictly required. The fourth is prominent key minority, seize the leadership of the party members and cadres is the key, and put forward higher requirements than the ordinary Party members. Five is to simplify, and strive to achieve concise, easy to understand, easy to remember. The revised < code > is the ruling Party since the first insists on a positiv