基坑围护堵漏方案.doc

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1、【精品文档】如有侵权，请联系网站删除，仅供学习与交流基坑围护堵漏方案.精品文档.昆明市轨道交通首期土建工程施工13标【昆明北站至北辰小区项目】白云路站基坑围护堵漏方案编制人： 审核人： 批准人： 中铁十五局集团有限公司昆明市轨道交通首期工程土建施工十三标项目经理部二一一年一月八日目录1 工程概况11）工程概况12）工程参建单位22 地质条件21）工程地质条件22）地下水的腐蚀性评价33）不良地质作用44）工程地质总体评价43 施工堵漏材料的介绍54 主要堵漏方法55 地墙渗漏及接缝处修补71）地下墙相邻接缝中渗水处理措施:72）地下墙墙体渗水处理措施：73）地下连续墙露筋空洞修补处理措施：94

2、）流砂的防治与处理：96 技术质量保证措施107 安全措施118 堵漏抢险应急机制12白云路站基坑围护堵漏方案1 工程概况1）工程概况本标段为昆明市轨道交通首期工程土建十三标段，包括2座车站和3个盾构区间，白云路站位于北京路与白云路交叉口地下，车站沿南北向布设。本站为地下两层岛式站台车站，车站有效站台中心里程右CK8+165.766，设计起点里程为右CK8+100.966，终点里程为右CK8+363.766。车站共设4个出入口和一个消防疏散口，4个出入口分别设置于路口四个象限。共设2组风亭，1号风亭位于西北侧地块，2号风亭位于东南侧地块内。消防疏散口与3号出入口合建。1号出入口位于路口西北侧地

3、块兆城金融商业广场门前，通道宽度5m；2号出入口位于路口西南侧；3号出入口位于东南侧地块金星宾馆附近；4号出入口位于东北侧地块。车站为标准站，平面形状主要为矩形，车站外包总长264.4m，标准段外包宽度19.7m，盾构井段宽23.8m，结构底板主要位于圆砾土(3)1,局部为粉砂 (3)1-3层，属类围岩,稳定性较好。车站一般段开挖深度约16.018.6m，北端盾构井段深约19.5m、南端盾构井深约17.8m。根据地质资料基坑开挖范围内的土层主要为填土、粉质粘土、粘土、圆砾。地下连续墙底进入圆砾层。总建筑面积为13381.86m2。主体结构采用明挖法及盖挖法施工，附属结构采用明挖法施工。基坑底部

4、地墙以上3m采用旋喷桩进行水平封堵。2）工程参建单位业主单位：昆明市轨道交通首期工程建设指挥部监理单位：上海建科建设监理咨询有限公司设计单位：中铁第四勘察设计院集团有限公司施工单位：中铁十五局集团有限公司2 地质条件1）工程地质条件地质及地层概况本次勘察揭露地层最大深度为60m，按地层沉积年代、成因类型将本工程场地勘察范围内的土层划分为第四系全新人工填土层、第四系全新统冲洪积层、第四系上更新统冲洪层三大类。与本站设计相关的土层自上而下依次为：第1层杂填土：褐灰、黑灰，稍密稍湿，表层为沥青混凝土，下含碎石，局部夹有碎砖块等，为路基结构层。分布较连续，厚度1.502.40m，平均厚度1.69m。第

5、1层粘土：褐黄色，湿，中压缩性，含云母、氧化铁，含少许风化碎石。局部为粉质粘土。分布较连续，层顶埋深1.501.80m，厚度0.601.50m，平均厚度0.95m。第3层粘土：褐灰深灰色，湿，中压缩性，含少量有机质，局部为粉质粘土。分布较连续，层顶埋深2.303.30m，厚度0.503.00m，平均厚度1.45m。第4层粉土：褐灰灰色，稍密，夹粉砂薄层。分布不连续，层顶埋深1.604.00m，厚度0.802.30m，平均厚度1.55m。第4层泥炭质粘土：黑灰黑，软塑可塑，高压缩性，有机质含量约1240，局部有机质含量大于60，相变为泥炭。分布较连续，层顶埋深2.202.60m，厚度0.50m。

6、第1层圆砾：深灰兰灰、褐黄，中密。圆形及亚圆形，级配较差，砾石成分为砂岩及灰岩，中等风化。2025m以上为粉土、粉砂为主要填充物，以下以粘性土为充填物。夹卵石、粘性土及粉土夹层，局部夹有胶结块。连续分布，且厚度大，均未揭穿，层顶埋深3.305.50m。第12层粘土：褐黄、兰灰、灰，硬塑，中压缩性。局部含515砾石，砾石成分为砂岩及灰岩，中等风化。分布不连续，厚度0.402.50m，平均厚度0.98m；层顶埋深8.1037.60m。第12层粉土：褐灰、灰、深灰，中密，局部地段相变为粉砂层，含砾，砾石含量315，局部夹腐木。分布不连续，厚度0.302.60m，平均厚度1.33m。2）地下水的腐蚀性

7、评价据在场地内取地下水样水质分析结果，场地地下水及地表水对混凝土结构无腐蚀性，对钢结构具弱腐蚀性，在类场地条件下对混凝土结构中钢筋无腐蚀性。3）不良地质作用拟建场地属中软场地土，场地类别为类。对已收集资料进行分析、整理、判别4层粉土粉砂层为液化土层，其余各层粉土粉砂层属上更新统地层，判定为不液化土层。4）工程地质总体评价本站地下以圆砾层为主，含水量大，地基承载力高，浅层土为承压力较高的粘土层，因此适合修建地下结构，但深层的强透水层使得基坑降水困难较大。3水文地质概况白云路站人工填土层（1）：顶部以杂填土为主，位于地面表层，分布广泛，大部分位于地下水位埋深以下，富水性一般。不同地段的填土成分，孔

8、隙率差异较大，故透水性有明显的差异，属弱中等透水层。粘土（2）3根据区域资料及室内渗透试验，属微透水层。富水性贫乏，可视为相对隔水层。粉土、粉砂（2）4、圆砾土（3）1，根据抽水试验，属中等透水。勘察时间测得稳定水位埋深3.204.38m，相应标高1887.831890.19m上层滞水主要分布于第四系人工活动层中，水位变福大。水量较小，主要接受大气降水、灌溉水、盘龙江等河流流水、生活废水和自来水、雨水、污水等地下管线漏水垂直渗漏补给。第四系承压水补给以径流和越流为主，排泄以侧向径流和人工抽取地下水方式为主。径流总体方向指向冲洪积扇下游或人工抽取地下水形成的地下水漏斗中心。上层滞水的水位变化与赋

9、存区域的环境关系密切，没明显的变化规律。潜水的动态与大气降水关系密切。3 施工堵漏材料的介绍1、速凝水泥速凝水泥是以双快水泥为主的掺有一定量的水泥外掺剂组成，施工时采用净浆水灰比为0.380.42；凝固速度23mm；五分钟以后强度可达56 Mpa；30分钟以后强度可达77.5Mpa；2小时后可达1215Mpa；具有微膨胀性，膨胀率0.04%0.05%的速凝水泥净浆不易龟裂，与砼粘接强度较好，此材料在承受较大水压力的情况下，也能很快凝固，达到一定的强度。 2、TZS聚氨酯注浆材料该材料能与砼裂缝里的水混溶乳化并进行化学反映，边发泡边膨胀边渗漏边凝固，固结后的聚氨酯材料与砼裂缝浑为一体起到止水堵漏

10、的目的。此浆液粘度小，无颗粒，渗透系数大，它不仅可对裂缝进行充填，也可渗入到裂缝周围的毛细孔中，与混凝土有较大的粘结力（粘结强度0.8Mpa），并且此材料还可以根据需要调节浆液的配比，使浆液固结体成为一弹性体，适应结构变形的需要和承受较大的水压力。4 主要堵漏方法一般混凝土裂缝堵漏施工（1）割缝槽 将漏水裂缝凿成“U”型槽，宽约5060mm，深5080mm左右，进行认真清洗，没有浮尘。（2）封槽埋管 在裂缝内先埋设一根尼龙管，然后再用双快型水泥进行封堵，用尼龙管抽槽，这样保证裂缝内连通。并在封堵时，封堵段尼龙管约40cm长，一端埋入裂缝，用双快水泥固定好，要求尼龙管与裂缝内连通。尼龙管间距80

11、100cm。封堵水泥时，管口离砼面下2cm左右，要求抹平、密实。（3）试压 检查凿缝封槽埋管的工作质量，绝不允许有渗水现象，测试裂缝的进浆量及注浆压力。（4）注浆 注浆材料采用TZS油溶性聚氨酯浆液 注浆压力：0.2Mpa 注浆比重：1.08 损失系数：1.20 扩散系数：1.20 浆量计算：注浆体积浆液比重扩散系数损失系数（5）表面处理 注浆完成后，缝槽表面用水泥砂浆进行修平处理，修平前，对缝槽进行清理，确保槽内无浮尘，无聚氨酯溶液，以保证水泥砂浆的牢固粘结。5 地墙渗漏及接缝处修补1）地下墙相邻接缝中渗水处理措施:确定渗漏部位；手工凿“V”形槽，深度50100mm；清除渗漏处松散混凝土、夹

12、砂、夹泥；堵漏材料配制：按早强水泥：水1：0.3-0.35（重量比），早强水泥慢慢加入到水中，并搅拌至均匀细腻；堵漏：将堵漏材料堵漏料捏成料团，放置一会儿（以手捏有硬热感为宜）后塞进“V”形槽，并用木棒挤压，轻砸使其向四周挤实，即可瞬间止漏；如渗漏量较大，则埋设注浆管引流，待双快水泥干硬后24小时内注入聚氨酯。510cm三角槽口，用早强水泥抹平2）地下墙墙体渗水处理措施：(1)填堵法在裂隙、蜂窝、孔眼处发生渗漏水而渗水面积不大时,采用防渗剂搅拌水泥浆进行封堵,先将漏水部位凿出,凿出深度510cm,冲洗干净后将掺入防渗剂的水泥浆对凿出部位进行封堵。(2)先排后堵法当漏水面积较大时,采用先排后堵漏

13、方法。先将漏水部位凿出,并安装排水管,将水汇集于排水管内排除,这时先将其它部位用掺入防渗透剂的水泥浆进行封堵,使渗漏面积逐渐缩小,最后再堵塞排水管。(3)打孔注浆堵漏在漏水严重的部位,由于水压高、水量大,出水口无法封堵,采用在基坑内地墙上打孔注浆堵水。先将地墙上的钢筋凿出,在无钢筋的地方,用风钻在地墙上打注浆孔,孔径4.0cm、深度1.51.8m。然后插入外径为3.0cm的注浆管, 注浆管为镀锌管或钢管，在墙外部位土体中的注浆管带有孔眼,在墙内段的注浆管无孔眼,用早强水泥砼封堵洞口的注浆管与注浆孔间的间隙,封口深度4050cm,用双液压浆泵将水泥浆水璃玻浆液通过注浆管注入土中。浆液的配合比为:

14、水泥浆:水玻璃浆（体积）=1:0.3,水泥浆的水灰比为0.7,水玻璃的浓度为4143波美度。注浆压力为35kg/cm2。3）地下连续墙露筋空洞修补处理措施：1）首先掏清泥砂，深度标准为3040cm，如在50cm内有夹泥，50cm以外是砼土，则在确保安全的情况下一次性掏清泥砂；2）除去钢筋泥锈；3）经验收后，并用堵漏料以早强水泥：黄砂：石子=1：1.6：0.7配制，视需要在空洞外支立木模板，填充堵漏料或浇注细石混凝土（比结构砼高一标号），并埋入注浆管，拆除模板后，表面用早强水泥砂浆抹平，然后进行注浆。4）流砂的防治与处理：在土体开挖时,可能会出现流砂现象,流砂的发生,对附近建筑物的稳定和施工极为

15、不利,因此,在后续工程施工前,必须提出防治措施。在土体开挖过程中,当连续墙某些部位出现流砂现象时,应及时查明流砂出现的具体位置及相应的地质条件、流砂出口的形状及范围、流砂量的大小,以便采取相应的处理措施。处理流砂的一般步骤如下。1、填堵封口:当开挖土体、墙上出现流砂时,应停止挖土。流砂从孔洞或裂隙中涌出时,先用棉絮堵塞孔洞或裂隙。然后再在棉絮中注入水泥浆水玻璃浆液,水玻璃的浓度为4143波美度。2、打孔注浆封堵流砂:支撑如上述方法不能堵住流砂，应用土回填堵住流砂口,然后在流砂口附近采用风钻从墙内向墙外打斜孔,孔径为4.0cm,孔深根据孔的斜度及流砂部位确定。在孔中注入水泥水玻璃浆液,浆液通过双

16、液注浆泵压入墙后的土体内。3、在地表打垂直孔进行注浆:如上述方法仍不能堵住流砂，应选地表能避开地下管线的部位,在地墙外侧靠近地墙处打垂直孔进行注浆封堵流砂。采用轻型钻机打孔,孔深根据流砂的部位确定,浆液采用水泥浆水玻璃浆液,用双液注浆泵将浆液注入流砂地段的土体中（见下图）。6 技术质量保证措施1、开挖过程中应做好及时回撑，以避免围护变形过大，引起渗漏水。2、施工时凿缝槽不得用机械风镐，一律用人工凿缝槽。3、清理缝槽，用钢丝刷清除，清水清洗干净为准，不可大量用水。4、地下连续缝清洗时，掏泥砂应用勾形工具，勾掏干净。5、地下墙连续缝渗漏水就从墙体表面接缝处凿开约15cm宽，13-15cm深三角缝槽

17、，如有夹土必要时扩大凿开面积，掏清泥土，清洗干净，用早强水泥封实，同时预埋注浆管24小时后进行注浆.6、注浆应用注浆泵分次注入，直至浆压不进为止。7、注浆管采用8mm透明塑料管，注浆管插入墙体内不得少于13公分深度，注浆完毕后，管头20#铁丝扎实。8、注浆采用堵漏剂采用TZS水溶性聚氨酯堵漏剂及早强水泥，附有产品质保书，经现场验收为准。9、施工人员进场后及时进行技术交底等各方面准备工作，并加强施工中的管理和质量控制，严格控制堵漏材料的配合比，确保工程质量。10、在施工中，遇有情况，应及时向有关负责人员汇报，渗漏严重的应立即组织抢险。7 安全措施1、施工人员进场，首先按照六大纪律加强安全教育，使

18、施工人员树立安全第一思想，遵守工地制度和施工现场纪律；2、施工人员进现场必须带好安全帽，扣帽带；3、使用电动工具时，必须戴好防电绝缘手套，无绝缘手套不得操作；4、注浆人员必须佩带防护眼镜；5、施工中，高度在2米以上时，应该搭好牢固的脚手架方可进行施工；6、每天上班由现场负责人做好安全交底并设专人进行安全检查；及时做好现场施工安全记录，做好施工日记。8 堵漏抢险应急机制1、为配合确保基坑安全施工，本项目部成立基坑堵漏专项领导小组。联系方式：序号姓名联系电话岗位1赵卫星13386622436项目经理2许多18608718875项目副经理3薛敬坤18687187180项目副经理4曾良峰1377709

19、3615项目总工程师5陈润锋15258282004质量员6许俊锋15988660152施工员7甄晓亮18787163850施工员2、现场24小时派人跟踪基坑围护渗漏情况，发现险情立即向有关部门汇报。如有特别严重的渗漏情况，应立即组织有关专家讨论决定具体补救办法，同时现场应做好初步的预防险情扩大的措施。3、现场应做好一定的应急物资的准备工作，如水泥、水玻璃、钢板、压浆泵等。 中铁十五局集团有限公司 昆明市轨道交通首期工程土建施工13标项目经理部 2011年1月8日 （英文版 ） Two regulations promulgated for implementation is in the pa

20、rty 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

21、, the adhere to a positive advocate, focusing on morality is of Party members and Party leading cadres can see, enough to get a high standard; around the party discipline, disciplinary ruler requirements, listed as negative list, focusing on vertical gauge, draw the party organizations and Party mem

22、bers 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

23、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. and revised the necessity and revised history of the CPC Central Co

24、mmittee the amendment to the Chinese Communist Party members and leading cadres honest politics several guidelines and 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, dr

25、aw 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 partys leadership, to solve the masses of the people reflect a focus on the problem. The new revision of

26、the and , reflects the partys 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 partys eighteen years comprehensive strictly practice. (a)

27、revised two regulations of the party need of in 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

28、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 banne

29、d 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. is in

30、 1997 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

31、 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

32、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 and the two is likely to be more relevant regulations first amendment. By revising, really put the authority of Party disc

33、ipline, 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 regulati

34、ons 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 201

35、4 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, p

36、ath 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 ex

37、perts 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) Part

38、y, 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 opin

39、ions, 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

40、 Communist Party of China formally issued two regulations. Can say, two laws amendment concentrated the wisdom of the whole party, embodies the party. Second, and revision of the basic principles of two party regulations revision work and implement the partys eighteen, ten eight plenary, the spirit

41、of the Fourth Plenary Session of the Eleventh Central Committee and General Secretary Xi Jinping important instructions on the revised and , 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 wh

42、ole, with Bu Xiuding independent and . 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. G

43、eneral 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

44、Jinping again pointed out that constitution is the party must follow the general rules, but also the general rules. the revision of the and 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

45、, 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

46、rule of virtue de, mainly refers to the partys ideals and beliefs, excellent traditional style. The revised the 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