桩基监理实施细则

武汉新港三江港区武钢集团鄂钢钢铁及矿石码头桩基工程施工监理细则编制：审定：湖北省水运工程咨询监理公司鄂钢工业码头建设项目（一期）水工部分工程监理部二0一0年十一月目录一、工程概况·······································································································11、工程规模·······························································································································12、结构型式······························································································································13、工程建设特点·························································································································2二、编制依据·······································································································3三、质量控制目标·································································································3四、施工工序的质量控制点设置···············································································3五、施工质量控要点及控制措施···············································································4（一）、PHC管桩沉放····················································································································41、监理程序····························································································································42、质量检验标准······················································································································63、监理要点····························································································································6（二）、灌注桩施工····················································································································101、监理程序··························································································································102、质量控制标准····················································································································113、质量控制要点····················································································································134、监理要点··························································································································15武汉新港三江港区武钢集团鄂钢钢铁及矿石码头桩基工程施工监理细则一、工程概况1、工程规模本工程拟建设1个5000吨级矿石进口泊位、1个3000吨级钢铁泊位，矿石进口泊位设计代表船型为5000吨级分节驳，钢铁泊位设计代表船型为3000吨级船舶，均兼顾5000吨级江海轮。年出口钢铁件杂100万吨、进口矿石200万吨，吞吐量总计300万吨/年。2、结构型式水工建筑物均采用直立式高桩梁板结构。钢铁码头水工建筑物包括码头桩台、引桥等。码头桩台长100m，宽30m。桩台桩基采用φ900mmδ16mm钢管桩和φ800mmB型PHC管桩结合方式，钢管桩端进入强风化砂岩至稳桩，末端采用植入式桩芯。桩台上部结构由现浇横梁、预制纵梁和预制面板、现浇面层组成。桩台船舶停靠处下设四层系缆平台，顶面利用码头面，共设置450KN铸铁系船柱5个，下面三层系缆平台均由φ700mmδ16mm纵向系船梁、φ700mmδ16mm钢联撑及钢走道板组成，系船梁上设置350KN钢质系船柱21对。钢铁码头桩台共设1条引桥与后方堤防公路连接。引桥长度为238m，宽度12m。钢铁码头引桥采用钢筋砼排架结构型式，排架间距为16m，每榀排架基础采用3根φ1000mm钻孔灌注桩，桩顶为现浇地梁、现浇钢筋砼立柱和现浇盖梁结构，上部结构采用预应力空心板及现浇面层结构。矿石码头水工建筑物包括码头桩台、检修桥和廊道等。码头桩台长140m，宽20m。桩台桩基采用φ900mmδ16mm钢管桩和φ800mmB型PHC管桩结合方式，钢管桩端进入强风化砂岩至稳桩，末端采用植入式桩芯。桩台上部结构由现浇横梁、预制纵梁和预制面板、现浇面层组成。桩台船舶停靠处下设四层系缆平台，顶面利用码头面，共设置450KN铸铁系船柱8个，下面三层系缆平台均由φ700mmδ16mm纵向系船梁、φ700mmδ16mm钢联撑及钢走道板组成，系船梁上设置350KN钢质系船柱30对。矿石码头桩台共设1条检修桥与钢铁码头引桥连接。检修桥长66.54m，宽5.5m。采用钢筋砼排架结构型式，结构型式同钢铁码头引桥。另通过一条皮带机廊道与后场厂区连接。皮带机廊道长392.0m，宽6.6m，采用钢筋砼排架结构型式，排架间距为30m～36m，每榀排架基础采用2根φ800mm钻孔灌注桩，桩顶为现浇地梁（承台）、现浇钢筋砼立柱结构，顶上安装有钢栈桥。3、工程建设特点a．本工程合同工期相当紧张，整个进度计划安排没有多少优化或压缩的余地，如有工期延误或非承包方原因造成的工程延期，对整个工程工期目标的实现将是个很大的考验。b.施工周期为6个月，在11~12月间是枯水季节，水位极低，可能影响沉桩。因此施工单位必须要做好预防措施，并抓紧有利于施工的天气组织大干，努力提高生产效率，确保施工如期完成。C.桩基施工是整个工程的重点，尤其是8：1斜率的PHC桩沉桩和嵌岩桩施工更是本工程施工的难点，对工艺组织和质量、进度控制的要求都比较高。因此承包单位在工程质量和进度上应充分重视，加强管理和控制，严格按有关施工规范及批准的施工方案进行施工；水上水下作业安全也须予以充分重视。二、编制依据（1）交通部《水运工程质量检验标准》（JTS257-2008）；（2）交通部《港口工程桩基规范》（JTJ254-98）；（3）交通部《高桩码头设计与施工规范》（JTJ291-98）；（5）交通部《港口工程嵌岩桩设计与施工规程》（JTJ285-2000）；（6）交通部《水运工程测量规范》（JTJ203-2001）；（7）交通部《港口工程灌注桩设计与施工规程》（JTJ248-2001）；（8）交通部《水运工程施工监理规范》（JTJ216-2000）；（9）国家和地方政府颁布的有关技术法规；（10）武汉新港三江港区武钢集团鄂钢钢铁及矿石码头工程合同文件；（11）武汉新港三江港区武钢集团鄂钢钢铁及矿石码头工程施工图纸；（12）经审批的施工组织设计；（13）武汉新港三江港区武钢集团鄂钢钢铁及矿石码头工程地质勘查报告三、质量控制目标本分部工程为主要分部，质量控制目标为：合格。沉桩分项工程为主要分部工程“基桩”的主要分项工程，为了确保本工程的总质量目标，沉桩分项工程的施工质量必须达到“合格”。四、施工工序的质量控制点设置为确保本工程各工序的质量，根据影响工程质量特征大小、危害重量度及质量保证大小而对本工程设置各分部、分项工程质量控制点，对工序活动中的重要部位、重要控制对象或薄弱环节，事先分析影响工程质量的原因，并提出相应的措施，以便进行预控，根据工程特点，下表所列质量控制点作为本工程质量控制的重点，根据国家和交通部颁布的最新规范、标准对质量控制点进行连续、全过程、全面的监控管理，控制好各工序内在质量，从而确保工程整体质量。桩基主要施工工序质量控制点五、施工质量控要点及控制措施（一）、PHC管桩沉放1监理程序分部工程分项工程质量控制点桩基PHC管桩、钢管桩桩出厂合格证、检验资料，桩外形尺寸，钢件质量、外观质量，接缝处弯曲矢高，桩长，桩顶倾斜。沉桩偏位、贯入度、桩尖桩高，桩身垂直度、桩身完整性，沉桩顺序、桩锤选择，衬垫替打选择。灌注桩偏位、桩底标高、桩身垂直度，沉渣厚度、入岩深度泥浆浓度、桩顶标高、桩身完整性、孔径偏差。审查施工条件监理工程师同意开工或要求整改核查开工准备工作承包商整改水上沉桩承包商核查沉桩过程监理工程师整改/重施1.发现不符合要求时，要求承包人进行改进，检查合格后同意继续沉桩。2.如有异常情况发生，应及时查找原因并报告业主，与设计单位和承包人多方研究解决。3.施工正常则进入下一阶段沉放。4.对PHC桩进行桩数4%的高应变检测和桩数10%的低应变检测1.施工顺序、测控布点、沉桩方案和进度安排2.施工水域廓清，沉桩船岸缆定位预设挖埋以及水上船只布置3.测量控制仪器检定配置围檩夹桩与防护承包商1．控制沉桩船准确进入预定位置，限位龙口是否精确到位，应根据地质情况进行适当偏岸定桩2．桩身偏位、倾斜度的校正控制3．关注沉桩过程中有无异常情况的发生，否则应及时报告4．严格按照沉桩贯入度和桩尖标高进行双控5．提交施工过程记录和测量资料，改进施工设备1.测量控制点是否精确，误差精度是否符合要求2.检查承包人监控情况，是否按照双控的原则控制沉桩过程3.沉桩时有无异常情况发生，否则应暂停施工查究原因并采取应对措施4.检查沉桩记录资料的真实完备性1.施工顺序和沉桩方案是否合理可行,进度能否满足要求、测量控制点能否满足精度要求2.沉桩船的型号、规格和施工能力能否满足施工强度3.储桩船的运输、到位情况，施工现场布置等4.组织体系、质保体系、人员到位等循环施工检查审核内容批复/指令提交报告资料不合格合格检查审核内容不合格批复/指令/报告合格1.以刚架和木枋等对单桩进行固定，使之成为片区。刚架结构足以保证桩群能够抵抗波浪和潮流的冲击2．水面应在适当范围内布置浮标，防止航行物体碰撞桩群，