南沙万达广场勘察报告

广/r/n州/r/n南/r/n沙/r/n万/r/n达/r/n广/r/n岩土工程勘察报告/r/n【/r/n详勘阶段·/r/nKC2014-5020/r/n项目负责/r/n黄俊泉/r/n报告编写/r/n范小志/r/n报告审核/r/n黄俊泉/r/n报告审定/r/n叶伟何/r/n总工程师/r/n叶伟何/r/n /r/n许汉森/r/n/r/n佛山地质工程勘察院/r/n43/r/n二○一四年二月/r/n /r/n/r/n1、概/r/n /r/n/r/n工/r/n程/r/n概/r/n /r/n勘/r/n察/r/n目/r/n的/r/n任/r/n /r/n/r/n勘/r/n察/r/n技/r/n术/r/n要/r/n /r/n/r/n勘/r/n察/r/n成/r/n果/r/n要/r/n /r/n/r/n执/r/n行/r/n技/r/n术/r/n标/r/n /r/n/r/n工/r/n作/r/n完/r/n成/r/n情/r/n /r/n/r/n勘/r/n察/r/n质/r/n量/r/n评/r/n /r/n/r/n2、自然地理概/r/n /r/n/r/n地/r/n理/r/n位/r/n置/r/n及/r/n交/r/n /r/n/r/n气/r/n象/r/n与/r/n水/r/n /r/n/r/n地/r/n形/r/n地/r/n /r/n/r/n地/r/n层/r/n与/r/n岩/r/n /r/n/r/n区/r/n域/r/n地/r/n质/r/n构/r/n /r/n/r/n3、拟建场地岩土工程条/r/n /r/n/r/n地/r/n形/r/n地/r/n /r/n/r/n岩/r/n土/r/n层/r/n工/r/n程/r/n地/r/n质/r/n特/r/n /r/n/r/n4、水文地质条/r/n /r/n/r/n4.1/r/n水/r/n概/r/n /r/n/r/n水/r/n和/r/n土/r/n对/r/n建/r/n筑/r/n材/r/n料/r/n的/r/n腐/r/n蚀/r/n性/r/n评/r/n /r/n/r/n5、场地和地基的/r/n效应评/r/n /r/n/r/n场/r/n地/r/n类/r/n别/r/n的/r/n确/r/n /r/n/r/n场/r/n /r/n动/r/n参/r/n数/r/n的/r/n确/r/n /r/n/r/n

/r/n饱/r/n和/r/n土/r/n液/r/n化/r/n判/r/n /r/n/r/n软/r/n土/r/n的/r/n震/r/n陷/r/n评/r/n /r/n/r/n6、不良地质作用及特殊性岩/r/n /r/n/r/n不/r/n良/r/n地/r/n质/r/n作/r/n用/r/n概/r/n /r/n/r/n特/r/n殊/r/n性/r/n岩/r/n /r/n/r/n7、基坑开挖支护评价和工程措施建/r/n /r/n/r/n土/r/n石/r/n工/r/n程/r/n分/r/n级/r/n及/r/n围/r/n岩/r/n分/r/n /r/n/r/n基/r/n坑/r/n工/r/n程/r/n评/r/n /r/n/r/n工/r/n程/r/n措/r/n施/r/n建/r/n /r/n/r/n室/r/n抗/r/n浮/r/n评/r/n /r/n/r/n环/r/n境/r/n保/r/n /r/n/r/n8、岩土工程条件评价与建/r/n /r/n/r/n岩/r/n土/r/n工/r/n程/r/n条/r/n件/r/n评/r/n /r/n/r/n建/r/n /r/n/r/n岩/r/n土/r/n层/r/n参/r/n数/r/n分/r/n析/r/n与/r/n选/r/n /r/n/r/n其/r/n它/r/n建/r/n /r/n附/r/n1/r/n、钻孔数据一览/r/n （附表/r/n1/r/n，/r/n4/r/n页/r/n2/r/n、各岩土层数据统计/r/n （附表/r/n2/r/n，/r/n1/r/n页/r/n3/r/n、标贯试验成果统计/r/n （附表/r/n3/r/n，/r/n1/r/n页/r/n4/r/n、土工试验成果统计/r/n （附表/r/n4/r/n，/r/n3/r/n页/r/n5/r/n、建筑场地类别划定计算/r/n （附表/r/n5/r/n，/r/n1/r/n页/r/n附/r/n1/r/n（/r/n1/r/n页/r/n2/r/n（/r/n1/r/n，/r/n1/r/n页/r/n3/r/n（/r/n2/r/n，/r/n26/r/n页/r/n4/r/n（/r/n3/r/n，/r/n20/r/n页/r/n5/r/n（/r/n4/r/n，/r/n202/r/n孔，/r/n202/r/n页/r/n6/r/n（/r/n5/r/n，/r/n1/r/n页/r/n附/r/n1/r/n2/r/n、/r/n板剪切试验报/r/n3/r/n4/r/n（/r/n27/r/n页/r/n（/r/n36/r/n页/r/n（/r/n8/r/n页/r/n（/r/n1/r/n页/r/n5/r/n6/r/n7/r/n（/r/n1/r/n页/r/n（/r/n3/r/n页/r/n1/r/n、/r/n概/r/n

/r/n广/r/n州/r/n南/r/n沙/r/n万/r/n达/r/n广/r/n【/r/n详/r/n勘/r/n阶/r/n段/r/n

/r/n图/r/n1.1-/r/n /r/n场/r/n地/r/n地/r/n理/r/n位/r/n置/r/n工程重要性等级为二级，/r/n地/r/n础设计等级为甲级，本次岩土工程勘察等级/r/n为甲级，基础/r/n勘/r/n察/r/n目/r/n的/r/n任/r/n本/r/n勘/r/n察/r/n阶/r/n段/r/n属/r/n施/r/n工/r/n图/r/n设/r/n计/r/n阶/r/n段/r/n的/r/n详/r/n细/r/n勘/r/n察/r/n。/r/n受/r/n建/r/n设/r/n单/r/n位/r/n广/r/n州/r/n南/r/n沙/r/n万/r/n达/r/n广/r/n场/r/n的/r/n委/r/n托/r/n，/r/n佛山地质工程勘察院对上述/r/n拟建建筑/r/n场地进行岩土工程勘察，目的是查明拟建场地工/r/n性岩土的防治、地/r/n/r/n工/r/n程/r/n概/r/n90～100m)/r/n4层/r/n，/r/n室暂定两层/r/n，/r/n室底板面暂定－11m，基坑开挖暂定深度-12m/r/n。/r/n室为整体，地面以上主体分为多个结构单元，主要结构形式为框架结构(裙楼)和框架-剪力墙结构（塔楼/r/n

/r/n和地基/r/n的/r/n效应评价，提供建筑/r/n地/r/n础设计、地基处理及基础施工方案的确定/r/n等提供岩土/r/n勘/r/n察/r/n技/r/n术/r/n要/r/n钻/r/n孔/r/n原/r/n《/r/n本次勘察勘探点的布置由根/r/n据/r/n/r/n岩土工程勘察规范/r/n（/r/nGB/r/n50021-2001/r/n，/r/n2009/r/n年版）关于详细勘察勘探线、勘探点间距要求，并结合本工程项目特点进行。全场地布置勘探点/r/n202/r/n《/r/n个，/r/n其中/r/n场/r/n体建筑裙楼及基坑范围布置/r/n132/r/n个勘探点（含/r/n5/r/n个前期勘探点/r/n其中控制性勘探点/r/n60/r/n个，/r/n一般性勘探点/r/n72/r/n个，/r/n勘探/r/n点/r/n为/r/nZK1/r/n～/r/nZK127/r/n（/r/n5/r/n个前期勘探/r/n点/r/n前加“原/r/n”/r/n字样/r/n场/r/n体建筑塔楼布置/r/n60/r/n个勘探点，/r/n勘探/r/n点/r/n为/r/nTZK1/r/n～/r/nTZK60/r/n，/r/nT/r/n为“塔楼”/r/n汉语拼音首字母，/r/n原则为自左而右、/r/n自上而下。/r/n钻孔位置见附图/r/n1/r/n/r/n“建筑物与勘探点平面位置/r/n钻/r/n孔/r/n的/r/n布/r/n/r/n1/r/n勘/r/n探/r/n点/r/n间/r/n距/r/n、/r/n深/r/n度/r/n的/r/n确/r/n定/r/n及/r/n其/r/n他/r/n勘/r/n察/r/n技/r/n术/r/n要/r/n15/r/n～/r/n30m/r/n12/r/n～/r/n24m/r/n间距确定。/r/n（/r/nB/r/n50021-2001/r/n，/r/n2009/r/n/r/n年版）/r/n5m/r/n5m/r/n5m/r/n8m/r/n。/r/n2/r/n～/r/n3m/r/n1/r/n处标贯试验，同一土层的孔内原位测试数/r/n6/r/n组。/r/n终孔后钻孔进行岩芯照相，/r/n24/r/n小时后测量/r/n水相对稳定水位/r/n勘/r/n察/r/n成/r/n果/r/n要/r/n判定土与/r/n水对建筑材料的腐蚀性/r/n

/r/n提出选择桩端持力层、桩型、施工可行性的建议；提出桩基础的侧摩阻力特征值和/r/n对地/r/n础方案、基坑开挖方案、工程降水及/r/n室抗浮措施进行论证分析/r/n执行/r/n技/r/n术/r/n标/r/n（/r/nGB/r/n50021/r/n－/r/n2001/r/n，/r/n2009/r/n年版/r/n《/r/n建筑岩土工程勘察规程/r/n（/r/nJGJ/r/n（/r/nJGJ/r/n《建筑地/r/n础设计规范/r/n（/r/nGB/r/n《建筑地/r/n础设计规范/r/n（/r/nDBJ/r/n（/r/nGB/r/n（/r/nDBJ/r/n（/r/nGB/r/n（/r/nGB/T/r/n（2010/r/n（/r/nCECS/r/n（/r/nJGJ/r/nT87-/r/n《中国/r/n动参数区划图/r/n（/r/nGB/r/n18306-/r/n《/r/n铁道、轻轨交通岩土工程勘察规范/r/n（/r/nGB/r/n50307-/r/n《工程地质手册/r/n（第四版，工程地质手册编写/r/n/r/n工/r/n作/r/n完/r/n成/r/n情/r/n2013/r/n9/r/n17/r/n日～/r/n9/r/n20/r/n1/r/n3/r/n日～/r/n2/r/n18/r/n15/r/nXY-1/r/n2014/r/n2/r/n18/r/n日完成野外勘察任务。/r/n1.6-1/r/n：/r/n表/r/n1.6-/r/n 南沙万达广场勘察工作量一览/r/n序/r/n工/r/n作/r/n内/r/n单/r/n工/r/n作/r/n /r/n1/r/n个/r/n含初勘编制报告钻孔/r/n27/r/n/r/n个，进尺/r/n1225.60m/r/nm/r/n2/r/n个/r/n2/r/nm//r/n由/r/n永基建筑基础/r/n协助完/r/n3/r/n次/r/n//r/n4/r/n处/r/n5/r/n件/r/n(/r/n组/r/n6/r/n件/r/n(/r/n组/r/n7/r/n件/r/n3/r/n件/r/n2/r/n8/r/n幅/r/n触探探头采用南光地质仪器仪表/r/n生产的/r/n10cm/r/n2/r/n双桥探头，触探机采用/r/nTJJT-35/r/n/r/n静力触探机，/r/n量测装置采用溧阳市科尔仪器/r/n生产的/r/nLMC-D310/r/n型静探微机；/r/n板剪切试验/r/n1985/r/n

/r/n1/r/n“钻孔数据/r/n年/r/n版/r/n，/r/n定/r/n名/r/n及/r/n地/r/n基/r/n承/r/n载/r/n力/r/n特/r/n征/r/n值/r/n的/r/n确/r/n定/r/n依/r/n据/r/n省/r/n标/r/n准/r/n《/r/n建/r/n筑/r/n地/r/n础/r/n设/r/n计/r/n规/r/n范/r/n（/r/nDBJ/r/n2003/r/n勘察/r/n质/r/n量/r/n评/r/n2/r/n、/r/n自/r/n然/r/n地/r/n理/r/n概/r/n地/r/n理/r/n位/r/n置/r/n及/r/n公/r/n里/r/n，/r/n广/r/n义/r/n上/r/n的/r/n大/r/n南/r/n沙/r/n面/r/n积/r/n为/r/n/r/n797/r/n/r/n平/r/n方/r/n公/r/n里/r/n，/r/n其/r/n中/r/n陆/r/n域/r/n面/r/n积/r/n/r/n339.5/r/n/r/n平/r/n方/r/n公/r/n里/r/n，/r/n包/r/n含/r/n沙/r/n湾/r/n水/r/n道/r/n以/r/n结构中处于支撑位置，是联结珠江口/r/n城市群的枢纽性节点。距广州市中心/r/n50/r/n/r/n公里，距/r/n香/r/n港/r/n38/r/n/r/n海/r/n里/r/n，距/r/n/r/n41/r/n/r/n海/r/n里/r/n。/r/n以/r/n南/r/n沙/r/n为/r/n中/r/n心/r/n，在/r/n60/r/n/r/n公/r/n里/r/n半/r/n径/r/n范/r/n围/r/n内/r/n有/r/n14/r/n/r/n个/r/n大/r/n中/r/n城/r/n市/r/n，/r/n由/r/n这/r/n些/r/n沙与广州中心城区乃至/r/n 角洲地区的路网形成快速便捷的联系，充分发挥南沙作为珠三/r/n气/r/n象/r/n与/r/n水/r/n气/r/n年/r/n平/r/n均/r/n气/r/n温/r/n/r/n21.9/r/n/r/n摄/r/n氏/r/n度/r/n，/r/n平/r/n均/r/n年/r/n降/r/n雨/r/n量/r/n/r/n1647.5/r/n/r/n毫/r/n米/r/n。/r/n因/r/n地/r/n处/r/n低/r/n纬/r/n度/r/n，/r/n，/r/n辐/r/n射/r/n强/r/n/r/n沙/r/n区/r/n有/r/n较/r/n大/r/n影/r/n响/r/n的/r/n热/r/n带/r/n气/r/n旋/r/n年/r/n平/r/n均/r/n/r/n1.6/r/n/r/n个，/r/n受/r/n台/r/n风/r/n影/r/n响/r/n极/r/n大/r/n风/r/n速/r/n/r/n35.4m/s/r/n。由/r/n于/r/n暴/r/n雨/r/n集/r/n中/r/n，地表/r/n水/r/n综合气象、水文所述，区内气象/r/n主要有热带气旋、暴雨，次为洪涝、干旱、寒潮、低/r/n1957/r/n年为年最大降雨量。因此，本区域气象水文条件不会引起大幅的/r/n水位下降，气象、水文条件中等。/r/n

/r/n地/r/n形/r/n地/r/n地/r/n层/r/n与/r/n岩/r/n区/r/n域/r/n地/r/n层/r/n岩/r/n根据/r/n1/r/n：/r/n100/r/n/r/n万《/r/n省区域地质志/r/n、/r/n1/r/n：/r/n20/r/n万《广州幅、江门幅区域地质测量报告书/r/n》/r/n（/r/nγ/r/n5/r/n2/r/n（/r/n3/r/n：/r/n长石、灰白色斜长石、石英和黑云母等组成，含少量角闪石。有时出现钾长石斑晶（含量/r/n5/r/n～/r/n20%/r/n8/r/n～/r/n15mm/r/n，构成似斑状结构。/r/n第/r/n四/r/n系/r/n沉/r/n积/r/n层/r/n分/r/n为/r/n上/r/n更/r/n新/r/n统/r/n和/r/n全/r/n新/r/n统/r/n两/r/n个/r/n地/r/n层/r/n单/r/n位/r/n，/r/n由/r/n老/r/n到/r/n新/r/n主/r/n要/r/n为/r/n石/r/n排/r/n组/r/n（/r/nQ/r/ns/r/nhp/r/n、/r/n西/r/n（/r/nQ/r/nx/r/n（/r/nQ/r/ns/r/n（/r/nQ/r/nx/r/nt/r/n（/r/nQ/r/nhl/r/n石排组/r/n以东莞市石排镇剖面为代表，/r/n指/r/n沿海三角洲平原最底部（不整合于基岩风化壳之上）/r/n西南镇组/r/n该组/r/n指/r/n沿海三角洲沉积下部的海进层，岩性为砂质粘土、粘土、淤泥及细砂。具滨海/r/n三角组/r/n（/r/n2-1/r/n）/r/n

/r/n西樵山大断裂等。资料表明，周边区域性断裂的热释/r/n光/r/n样测定，活动断裂一般在中更新世/r/n好，基岩稳定性良好。根/r/n据/r/n《建筑抗震设计规范/r/n（/r/nGB/r/n50011-2010/r/n）第/r/n4.1.7/r/n条规定，/r/n8/r/n7/r/n度，/r/n三期侵入黑云母花岗岩，岩性单一，受古地理环/r/n境/r/n地表冲刷等因素/r/n影响，全风化～/r/n强风化/r/n区/r/n域/r/n地/r/n质/r/n构/r/n

/r/n

/r/n2.5-1/r/n/r/n场/r/n地/r/n周/r/n边/r/n区/r/n域/r/n地/r/n质/r/n构/r/n造/r/n＜据/r/n/r/n1/r/n：/r/n100/r/n/r/n万/r/n《/r/n省区域/r/n地/r/n质/r/n志/r/n（/r/n省/r/n地/r/n质/r/n矿/r/n产/r/n局/r/n）/r/n编/r/n本勘察场地/r/n所在区域/r/n 活动相对较弱，活动频率较低地区。根/r/n 《建筑抗/r/n造运动性质方面：/r/n燕山第三期（晚侏罗世）的侵入活动是/r/n本区/r/n 构造活动，侵入的花/r/n

/r/n设计规范/r/n（/r/nGB/r/n50011-2001/r/n，/r/n2008/r/n年修订版/r/n及国家质量技/r/n术/r/n2001/r/n年/r/n2/r/n月发布的/r/n/r/n2001/r/n，/r/n7/r/n3/r/n、/r/n拟/r/n建/r/n场/r/n地/r/n岩/r/n土/r/n工/r/n程/r/n条/r/n地/r/n形/r/n地/r/n岩/r/n土/r/n层/r/n工/r/n程/r/n地/r/n质/r/n特/r/n5/r/n（/r/nQ/r/n4/r/nm/r/nl/r/n（/r/nQ/r/n4/r/nm/r/nc/r/n入黑云母花岗岩（γ/r/n2/r/n（/r/n3/r/n）/r/n）等岩性组成。本场地人工填土层以素填土为主，局部为杂填土；第/r/n（/r/nγ/r/n5/r/n2(3/r/n)/r/n，埋藏/r/n5/r/n人/r/n工/r/n填/r/n土/r/n地共计/r/nZK6/r/n等/r/n127/r/n个钻孔/r/n填土层/r/n层厚/r/n0.50/r/n～/r/n15.70m/r/n平均厚度/r/n2.34m/r/n局部填土厚度/r/n7.60/r/n～/r/n3.88m/r/n

/r/n本/r/n层/r/n经/r/n8/r/n/r/n次/r/n标/r/n准/r/n贯/r/n入/r/n试/r/n验/r/n实/r/n测/r/n击/r/n数/r/nN/r/n′=/r/n7/r/n～/r/n15/r/n/r/n平/r/n均/r/n值/r/nN/r/n′/r/nm/r/n=10.3/r/n/r/n标/r/n准/r/n值/r/nN/r/n′/r/nk/r/n=7.0/r/n/r/n（/r/n/r/n及/r/n圆/r/n砾/r/n、/r/n卵/r/n石/r/n等/r/n，/r/n填/r/n土/r/n组/r/n分/r/n变/r/n化/r/n较/r/n大/r/n。/r/n根/r/n据/r/n，/r/n砂/r/n质/r/n填/r/n土/r/n层/r/n渗/r/n透系/r/n数/r/nk/r/n20/r/n=1.88E-04/r/n～/r/n1.91E-03cm/s/r/n，属中等透水性。具体物理力学性质指标及颗粒组成见附表/r/n4/r/n“土工试验成果统/r/n（/r/n第/r/n四/r/n系/r/n全/r/n新/r/n统/r/n三/r/n角/r/n洲/r/n海/r/n陆/r/n交/r/n互/r/n相沉/r/n积/r/n层/r/n第四系海陆交互相冲积层主要由/r/n粉质粘土/r/n、/r/n淤泥（淤泥质土/r/n等组成，其工程地质特征叙述如下：/r/nZK92，ZK93，ZK98，TZK23，TZK27，TZK34，TZK51～TZK54，TZK58，ZK123/r/n29/r/n0.60/r/n～/r/n1.80m/r/n1.10m/r/n5.83/r/n～/r/n3.18m/r/n0.00/r/n～/r/n2.60m/r/n。呈灰黄色、/r/n1/r/nN/r/n′=/r/n7/r/nN/r/n=6.6/r/n0.00/r/n～/r/n15.70m/r/n。土层呈深灰色、灰色，流塑。大多粘滑细腻，局部粉砂及贝壳等含量/r/n（/r/n2-2-1/r/n）/r/n淤/r/n泥/r/n：/r/n层厚/r/n/r/n3.00/r/n～/r/n19.20m/r/n，平均/r/n厚/r/n度/r/n/r/n15.90m/r/n，/r/n顶/r/n板/r/n标高/r/n/r/n5.64/r/n～/r/n-9.79m/r/n，顶板/r/n埋/r/n987/r/n/r/nN/r/n′=/r/n0.5/r/n～/r/n3/r/n/r/nN/r/n′/r/nm/r/n=1.7/r/n/r/nN/r/n′/r/nk/r/n=1.6/r/nN/r/n=0.4/r/n～/r/n2.6/r/nN/r/nm/r/n=1.4/r/nN/r/nk/r/n=1.3/r/n119/r/nGB/r/n/r/n50021/r/n定名，/r/n109/r/n件为淤泥，/r/n9/r/n件为淤泥质土，/r/n1/r/n件为流/r/n1/r/n/r/n件粉质粘土夹层样，/r/n118/r/n/r/n4/r/n根据土工测试，本层淤泥/r/n24/r/n/r/n件土工样的固结系数/r/nC/r/nv/r/n=1.50E-04/r/n～/r/n5.50E-03cm/r/n2/r/n/s/r/n1.04E-03cm/r/n2/r/n/s/r/n；/r/n26/r/nc/r/n=10.4/r/n～/r/n37.5kPa/r/nc/r/nm/r/n=23.0kPa/r/n，标准值/r/nc/r/nk/r/n=20.7kPa/r/n，内摩擦角/r/nφ/r/n=8.4/r/n～/r/n19.7/r/n°，平均值/r/nφ/r/nm/r/n=11.9/r/n°标准值/r/nφ/r/nk/r/n=10.8/r/n°；渗透系数/r/n/r/n0/r/n6/r/nc/r/nm/r/n//r/ns/r/n06/r/nc/r/nm//r/ns/r/n4.25%/r/n。/r/n表/r/n3.2-/r/n /r/n第（/r/n2-2-1/r/n）/r/n/r/n层/r/n淤泥物理力学性质指标统计/r/n测/r/n试/r/n /r/n标/r/n计/r/n指/r/n标/r/n％/r/n/r/n/r/n％/r/n％/r/nc/r/n°/r/nf/r/nak/r/n/r/n平/r/n均/r/n标/r/n准/r/n（/r/n2-2-2/r/n）淤/r/n泥/r/n质/r/n土/r/n：/r/n3.50/r/n～/r/n17.20m/r/n8.62m/r/n，顶板标高/r/n-8.13/r/n～/r/n-15.71m/r/n，顶板/r/n460/r/nN/r/n′=/r/n1/r/n～/r/n4/r/nN/r/n′/r/nm/r/n=2.5/r/n

/r/nN/r/n=0.7/r/n～/r/n3.2/r/nN/r/nm/r/n=1.8/r/nN/r/nk/r/n=1.7/r/n24/r/nGB50021/r/n定名为淤泥、淤泥质土。其主要的物理力学性质统/r/n3.2-2/r/n。/r/n表/r/n3.2-/r/n /r/n第（/r/n2-2-2/r/n）/r/n/r/n层/r/n淤泥质土物理力学性质指标统计/r/n测/r/n试/r/n /r/n标/r/n计/r/n指/r/n标/r/n％/r/n/r/n/r/n％/r/n％/r/nc/r/n°/r/nf/r/nak/r/n/r/n平/r/n均/r/n标/r/n准/r/n0.90/r/n～/r/n6.90m/r/n，顶板标高/r/n-10.07/r/n～/r/n-20.87m/r/n17.40/r/n～/r/n27.20m/r/n。呈灰褐色、灰黄色。/r/n1/r/n0～20/r/n%/r/n，分布不均匀。/r/n/r/n/r/n/r/n/r/n13.0/r/n击，平均值/r/nN/r/nm/r/n=8.7/r/n/r/n击，标准值/r/nN/r/nk/r/n=7.7/r/n/r/n击。根据校正后的标贯击数标准值，参考/r/n省标/r/nDBJ15-31-2003/r/n4.4.3-1/r/nf/r/nak/r/n＜180/r/nkPa/r/n。/r/n4/r/n/r/nGB/r/n/r/n50021-2001/r/n（/r/n2009/r/n/r/n年版）/r/n4/r/n，/r/n/r/n，/r/n测/r/n试/r/n /r/n标/r/n计/r/n指/r/n标/r/n％/r/n/r/n/r/n％/r/n％/r/n测/r/n试/r/n /r/n标/r/n计/r/n指/r/n标/r/n％/r/n/r/n/r/n％/r/n％/r/nc/r/n°/r/n平/r/n均/r/n标/r/n准/r/nN/r/n′/r/n=7/r/n～/r/n20/r/nN/r/n=4.9/r/n～/r/n13.4/r/n/r/n击，平均值/r/nN/r/nm/r/n=7.9/r/n/r/n击，标准值/r/nN/r/nk/r/n=7.4/r/n/r/n击。根据校正后的标贯击数标准值，参考/r/n省/r/n

/r/n（/r/n2-6/r/n）/r/n淤/r/n泥/r/n夹/r/n蚝/r/n壳/r/n：/r/n零/r/n星/r/n分/r/n布/r/n，/r/n全/r/n场/r/n地/r/n仅/r/n于场地东/r/n北面的/r/n/r/nZK61/r/n，/r/nZK75/r/n，/r/n

/r/nDBJ/r/n15-31-2003/r/n4.4.3-1/r/nf/r/nak/r/n＜140/r/nkPa/r/n地/r/n于/r/nZK/r/n7～/r/nZK11(/r/n原/r/nZK1)/r/n，/r/nZK1/r/n8～/r/nZK23(/r/n原/r/nZK171)/r/n，/r/nZK2/r/n9～/r/nZK40/r/n，/r/nZK42/r/n，/r/nZK43/r/n，/r/nZK4/r/n9～/r/n/r/nZ/r/n1/r/n3/r/n～/r/nZ/r/n18/r/n5/r/n，/r/nTZ/r/n1/r/n～/r/nTZ/r/n4/r/n，/r/n1/r/n，/r/nZ/r/n，/r/n10/r/n/r/n71/r/n/r/n2/r/n层软弱土层。以淤泥为主，局部为淤泥质土，具有承载力低、高压缩性、高灵敏度、抗剪能力/r/n1.50/r/n～/r/n14.00m/r/n5.49m/r/n-8.13/r/n～/r/n-27.23m/r/n14.40/r/n～/r/n33.70m/r/n黏滑细腻，局部粉砂含量较高，为薄层状粉砂与淤泥质土互层或为团块状粉砂。/r/n本/r/n层/r/n经/r/n84/r/n/r/n次/r/n标/r/n准/r/n贯/r/n入/r/n试/r/n验/r/nN/r/n′=/r/n1/r/n～/r/n4/r/n/r/n平/r/n均/r/n值/r/nN/r/n′/r/nm/r/n=3.0/r/n/r/n标/r/n准/r/n值/r/nN/r/n′/r/nk/r/n=2.9/r/n/r/nN/r/n/r/n2.8/r/nN/r/nm/r/n=2.0/r/nN/r/nk/r/n=1.9/r/n3.2-3/r/n。/r/n表/r/n3.2-/r/n /r/n第（/r/n2-5/r/n）/r/n/r/n层淤泥物理力学性质指标统计/r/n

/r/n/r/n3.30/r/n～/r/n4.20m/r/n3.67m/r/n26.81m/r/n33.00m/r/n。呈灰白色、深灰色。流塑。蚝壳含量约占/r/n45/r/n～/r/n50%/r/n，/r/n较大，大多/r/n0.5/r/n～/r/n10.0cm/r/n不/r/n4/r/n次标准贯入试验，/r/nN/r/n′=/r/n5/r/n～/r/n17/r/nN/r/n′/r/nm/r/n=10.3/r/n击；/r/nN/r/n/r/n=3.4/r/n～/r/n11.2/r/n击，平均/r/nN/r/nm/r/n=6.8/r/n击。/r/n（/r/n2-7/r/n）/r/n粉/r/n砂/r/n、/r/n细/r/n砂：/r/n场地内分布范围较广泛，主要/r/n于/r/nZK1/r/n/r/n等/r/n140/r/n/r/n个钻孔中，为场地内第四系主要含水层之一。层厚/r/n0.80/r/n～/r/n10.30m/r/n，平均厚度/r/n3.03m/r/n，顶板标高/r/n-16.83/r/n～/r/n-31.42m/r/n，/r/n本/r/n层/r/n经/r/n标/r/n贯/r/n试/r/n验/r/n134/r/n/r/nN/r/n′/r/n=8/r/n～/r/n24/r/n/r/n平/r/n均/r/n值/r/nN/r/n′/r/nm/r/n=16.5/r/n/r/n标/r/n准/r/n值/r/nN/r/nk/r/n′/r/n=16.1/r/n/r/nN/r/n=5.4/r/n～/r/n16.1/r/n击，平均值/r/nN/r/nm/r/n=11.2/r/n击，标准值/r/nN/r/nk/r/n=10.9/r/n/r/n击。根据校正后的标贯击数标准值，参考/r/n省/r/nDBJ15-31-2003/r/n4.4.3-1/r/nf/r/nak/r/n=144/r/nkPa/r/n。/r/n15/r/nGB/r/n50021-2001/r/n（/r/n2009/r/n年版）定名，/r/n11/r/n件为粉砂，/r/n3/r/n件为中砂，/r/n1/r/n件为粉土。剔除粉土夹层，/r/n14/r/n4/r/n“土工试验成果/r/n4/r/n第/r/n四/r/n系/r/n全/r/n新/r/n统/r/n河/r/n流/r/n相/r/n冲/r/n积/r/n层/r/n（/r/nQ/r/n/r/n4/r/n（/r/n3-1/r/n）中/r/n砂/r/n、/r/n粗/r/n砂/r/n：/r/n局部分布较为连续，/r/n于/r/nZK/r/n1/r/n等/r/n172/r/n/r/n个/r/n钻孔中，是本场地第四系/r/n1.00/r/n～/r/n14.50m/r/n5.87m/r/n24.50/r/n～/r/n41.30m/r/n。/r/n257/r/n次标贯试验，/r/nN/r/n′/r/n=12/r/n～/r/n42/r/nN/r/n′/r/nm/r/n=27.4/r/nN/r/nk/r/n′/r/n=26.9/r/n击；校/r/nN/r/n=8./r/n1～/r/n27.1/r/n击/r/n,/r/nN/r/nm/r/n=18.2/r/nN/r/nk/r/n=17.8/r/n参考/r/n省标准/r/nDBJ15-31-2003/r/n表/r/n4.4.3-1/r/n，中粗砂地基承载力特征值的经验值/r/nf/r/nak/r/n=234/r/nkPa/r/n。/r/n40/r/n/r/nGB/r/n/r/n50021-2001/r/n（/r/n2009/r/n/r/n年版）/r/n4/r/n

/r/n4/r/n个风化岩带。现按风化强度差异性分带分述如下：/r/n（/r/n4-1/r/n）/r/n全/r/n风/r/n化/r/n岩/r/n带/r/n（/r/nW/r/n4/r/n：/r/n分布/r/n不连续，仅/r/n原/r/nZK184，ZK11(原/r/nZK1)等/r/n2/r/n个/r/n钻孔有/r/n，/r/n2/r/n/r/n次标贯试验，/r/nN/r/n′=/r/n44/r/n～/r/n45/r/n/r/nN/r/n′/r/nm/r/n=/r/n44.0/r/n/r/n击；/r/nN/r/n=28.3/r/n～/r/n28.7/r/n/r/nN/r/nm/r/n=/r/n28.5/r/nDBJ/r/n15-31-2003/r/n4.3.9/r/nE/r/n0/r/n=/r/nα/r/nN/r/n′/r/n=2.5×44.0MPa/r/nDBJ/r/n15-31-2003/r/n4.3.7/r/n条规定，中砂、粗砂的内摩擦角/r/n

/r/n/r/n15/r/n/r/n/r/n=34/r/n

/r/n该/r/n层/r/n变/r/n形/r/n模/r/n量/r/n建/r/n议/r/n取/r/n/r/nE/r/n0/r/n=90MPa/r/nZK101/r/n，/r/nZK102/r/n，/r/nZK111/r/n，/r/nZK112/r/n，/r/nZK126/r/n，/r/nZK127/r/n/r/n38/r/n/r/n个钻孔中，是本场地第四系主要含水/r/n1.40/r/n～/r/n9.80m/r/n4.44/r/nm/r/n36.49m/r/n10/r/n～/r/n20%/r/n。级配较好。/r/n41/r/n次标贯试验，/r/nN/r/n′/r/n=19/r/n～/r/n49/r/nN/r/n′/r/nm/r/n=34.7/r/nN/r/nk/r/n′/r/n=32.9/r/n击；校/r/nN/r/n=12./r/n9～30.6/r/n,/r/nN/r/nm/r/n=22.7/r/nN/r/nk/r/n=21.6/r/n击。/r/n8/r/n/r/nGB/r/n/r/n50021-2001/r/n（/r/n2009/r/n/r/n年版）定名，/r/n7/r/n/r/n件为砾砂，/r/n1/r/n/r/n物理力学性质指标及颗粒组成见附表/r/n4/r/n

/r/n（/r/n4-2/r/n）/r/n强/r/n风/r/n化/r/n岩/r/n带/r/n（/r/nW/r/n3/r/n：/r/n大多/r/n钻孔均有/r/n，/r/n于/r/nZK1～ZK17，ZK21～ZK28，ZK32～/r/n顶板标高/r/n-23.89/r/n～/r/n-42.39m/r/n30.60/r/n～/r/n48.20m/r/n。岩面起伏变化较大，由北向南岩面埋藏深/r/nDBJ/r/n15-31-2003/r/n4.3.7/r/n条规定，砾砂的内摩擦角/r/n

/r/n/r/n15/r/n/r/n/r/n=35/r/n

/r/n燕/r/n山/r/n三/r/n期/r/n（γ/r/n5/r/n2(3)/r/n）/r/n花/r/n（γ/r/n5/r/n2/r/n（/r/n3/r/n等～较/r/n大，整体上岩石垂直风化分带明显，/r/n受/r/n古地理环/r/n 地表冲刷等因素/r/n影响，全风化/r/n

/r/n16/r/n次标贯试验，/r/nN/r/n′/r/n=60/r/n～/r/n97/r/nN/r/n′/r/nm/r/n=82.6/r/n/r/nN/r/nk/r/n′/r/n=77.7/r/n击；校正击/r/nN/r/n=39.1/r/n～/r/n61.3/r/n击/r/n,/r/nN/r/nm/r/n=53.1/r/nN/r/nk/r/n=50.1/r/nDBJ/r/n15-31-2003/r/n4.3.9/r/nE/r/n0/r/n=/r/nα/r/nN/r/n′/r/n=2.5/r/n×/r/n77.7MPa/r/n=194.2MPa/r/nE/r/n0/r/n=180MPa/r/n3/r/n（/r/nW/r/n2/r/n/r/n20/r/n18/r/n2/r/n件，/r/n按不同的强度区间进行分类统计。统计结果见/r/n3.2-3/r/n。/r/n灌/r/n注/r/n桩/r/n，/r/n建/r/n议/r/n值/r/nf/r/nrs/r/n=/r/nf/r/nrp/r/n=18.0MPa/r/nf/r/na/r/n=3500kPa/r/n。/r/n。/r/n（/r/nW/r/n1/r/n/r/n4.40m/r/n，顶板标高/r/n-29.23/r/n～/r/n-44.45m/r/n35.60/r/n～/r/n50.20m/r/n。岩性为花岗岩，局部岩/r/n。/r/n75/r/nf/r/nr/r/n=30.6/r/n～/r/n102.4MPa/r/n，按不同的强度区间/r/n进行分类统计。统计结果见/r/n3.2-3/r/n。/r/n灌/r/n注/r/n桩/r/n，/r/n建/r/n议/r/n值/r/nf/r/nrs/r/n=/r/nf/r/nrp/r/n=40.0MPa/r/nf/r/na/r/n=12000kPa/r/n。/r/n2/r/n8.3-1/r/n。/r/n

/r/n表/r/n3.2-/r/n /r/n中风化岩带、微风化岩带花岗岩岩石单轴抗压强度统计结果/r/n抗/r/n范/r/n统/r/n项/r/n岩/r/n石/r/n抗/r/n压/r/n强/r/n度/r/n值/r/nf/r/nr/r/n/r/n中/r/n风/r/n化/r/n岩/r/n带/r/n微/r/n风/r/n化/r/n岩/r/n带/r/n3/r/n2/r/n平/r/n均/r/n标准差/r/n变异系数/r/n修正系数/r/n标/r/n准/r/n4/r/n、/r/n水/r/n文/r/n地/r/n质/r/n条/r/n4.1/r/n水/r/n概/r/n/r/n5.97m/r/n之间。/r/n水位受季节、天气影响而变化，雨季水位上升，旱季略为下降/r/n。场地环境/r/n类/r/n型属Ⅱ类，按地层渗透性划分主要属强透水层（/r/nA/r/n类/r/n。/r/nSO/r/n/r/n4/r/nNH/r/n+/r/n/r/n值/r/nHCO/r/n/r/n3/r/n强/r/n微/r/n微/r/n弱/r/n微/r/n弱/r/n强/r/n微/r/n微/r/n弱/r/n微/r/n中/r/n强/r/n微/r/n微/r/n弱/r/n微/r/n中/r/n为花岗岩风化岩石裂隙中/r/n，/r/n具较好连通性的部位/r/n水活动较强烈，含水/r/n量/r/n相/r/n对/r/n较丰富，但分布不均匀，水质较好。基岩裂隙水的补给来源为第四系孔隙水的垂直渗入及含水层侧向渗流补给，排泄方式为蒸发及向下渗透。/r/n总体评价本场地/r/n水涌水量较丰富/r/n水/r/n和/r/n土/r/n对/r/n建/r/n筑/r/n材/r/n料/r/n的/r/n腐/r/n蚀/r/n性/r/n评/r/n（/r/n1/r/n）/r/n水/r/n对/r/n建/r/n筑/r/n材/r/n料/r/n的/r/n腐/r/n蚀/r/n性/r/n评/r/nTZK16/r/n、/r/nZK55/r/n、/r/nZK125/r/n3/r/n1/r/n件工程水化学分析样，其水/r/nGB50021/r/n12.2/r/n4.2-1/r/n。/r/n表/r/n4.2-/r/n /r/n水对混凝土结构腐蚀性评价/r/n

/r/n根据/r/n《岩土工程勘察规范/r/n（/r/nGB/r/n/r/n50021-2001/r/n，/r/n2009/r/n/r/n年版/r/n，对本工程项目勘/r/n察/r/n场地/r/nTZK16/r/n、/r/nZK55/r/n、/r/nZK125/r/n等/r/n3/r/n个钻孔/r/n水对建筑材料的腐蚀性判定如下：/r/n（/r/nMg/r/n2+/r/n（/r/nNH/r/n4/r/n+/r/n性；/r/npH/r/n/r/n值/r/n=7.34/r/n，侵蚀性/r/nCO/r/n2/r/n=0.00mg/L/r/n，/r/nHCO/r/n3/r/n-/r/n=2.891mmol/L/r/n，在本场地强透水层（/r/nA/r/n）中地/r/n下水对混凝土结构具微腐蚀性；水中的/r/nCl/r/n-/r/n含量/r/n=427.88mg/L/r/n，在长期浸水环境中对钢筋混凝土/r/nZK55/r/n：/r/n水水质类型/r/n为/r/nCl—K+Na/r/n/r/n型水。/r/n水/r/n样/r/n中的硫酸盐含量/r/n（/r/nSO/r/n4/r/n2-/r/n）/r/n（/r/nMg/r/n2+/r/n（/r/nNH/r/n4/r/n+/r/n性；/r/npH/r/n/r/n值/r/n=7.21/r/nCO/r/n2/r/n=0.00mg/L/r/n，/r/nHCO/r/n3/r/n-/r/n=3.243mmol/L/r/n，在本场地强透水层（/r/nA/r/n）中地/r/nCl/r/n-/r/n含量/r/n=996.05mg/L/r/n，在长期浸水环境中对钢筋混凝土/r/nZK125/r/n：/r/n水水/r/n质类/r/n型/r/n为/r/nCl—K+Na/r/n/r/n型水/r/n。/r/n水/r/n样/r/n中/r/n的硫/r/n酸盐/r/n含量/r/n（/r/nSO/r/n4/r/n2-/r/n）/r/n（/r/nMg/r/n2/r/n+/r/n（/r/nNH/r/n4/r/n+/r/n性；/r/npH/r/n/r/n值/r/n=7.40/r/nCO/r/n2/r/n=0.00mg/L/r/n，/r/nHCO/r/n3/r/n-/r/n=4.249mmol/L/r/n，在本场地强透水层（/r/nA/r/n）中地/r/nCl/r/n-/r/n含量/r/n=721.64mg/L/r/n，在长期浸水环境中对钢筋混凝土/r/n土/r/n对/r/n建/r/n筑/r/n材/r/n料/r/n的/r/n腐/r/n蚀/r/n性/r/n评/r/n（/r/nGB/r/n/r/n50021-2001/r/n，/r/n2009/r/n/r/n年版）/r/n

/r/n4.1.4/r/n/r/n500m/s/r/n/r/n且/r/n500m/s/r/n/r/n4.1.5/r/n/r/n层/r/n等/r/n效/r/n剪/r/n切/r/n波/r/n速/r/n/r/nv/r/nse/r/n，/r/n应/r/n按/r/n下/r/n列/r/n公/r/n式/r/n计/r/n算/r/n4.2-2/r/n

/r/n

/r/n/r/n/r/nt/r/n

/r/n/r/n表/r/n4.2-/r/n /r/n土对混凝土结构腐蚀性评价/r/n /r/nn/r/n/r/n/r/npH/r/npH/r/nSO/r/n2/r/n－/r/nHCO/r/n/r/n3/r/nCO/r/n2/r/n－/r/n级/r/n级/r/n级/r/n弱/r/n微/r/n微/r/n弱/r/n中/r/n微/r/ni/r/n/r/n1/r/n/r/n

/r/n评/r/n价/r/n结/r/n的/r/n/r/nCl/r/n-/r/n含/r/n量/r/n在/r/n长/r/n期/r/n浸/r/n水/r/n环/r/n境/r/n中/r/n对/r/n钢/r/n筋/r/n混/r/n凝/r/n土/r/n结/r/n构/r/n中/r/n钢/r/n筋/r/n具/r/n微/r/n腐/r/n蚀/r/n性/r/n在/r/n干/r/n湿/r/n交/r/n替/r/n环/r/n境/r/n中/r/n对/r/n钢/r/n筋/r/n

/r/n式中：/r/nd/r/n0/r/n为计算深度/r/n(m)/r/n20m/r/nt/r/n为剪切波在/r/n地面至计算深度之间的/r/n时间/r/nd/r/ni/r/ni/r/n土层的厚度/r/n(m)/r/n；/r/nv/r/nsi/r/ni/r/n土层的剪切波速/r/nn/r/n表/r/n5.1-/r/n /r/n各类建筑场地的覆盖层厚/r/nⅡ/r/nⅢ/r/nⅣ/r/n0/r/n0/r/n综合评定土的腐蚀性等级为中等腐蚀/r/n应按现行/r/n/r/n工业建筑防腐设计规范/r/n（/r/nGB/r/n50046/r/n）/r/n5/r/n、/r/n场/r/n地/r/n和/r/n地/r/n基/r/n的/r/n效/r/n应/r/n评/r/n场/r/n地/r/n类/r/n别/r/n的/r/nGB50011/r/n4.5-1/r/n/r/n

/r/n取/r/nZK1/r/n、/r/nZK22/r/n、/r/nZK57/r/n、/r/nZK116/r/n、/r/nZK127/r/n/r/n等/r/n5/r/n/r/n性钻孔进行计算（计算过程见附表/r/n5/r/n。/r/n5/r/n5.1-2/r/n所示。/r/n表/r/n5.1-/r/n /r/n工程/r/n钻孔的土层等效剪切波速、覆盖层厚度和建筑场地类别划/r/nv/r/nse/r/nd/r/nov/r/n/r/n场/r/n地/r/n类/r/n别/r/n属/r/nⅢ/r/n类/r/n，/r/n设/r/n计/r/n特/r/n征/r/n周/r/n期/r/n值/r/n/r/nT/r/ng/r/n=0.45s/r/n场/r/n地/r/n动参/r/n数/r/n的/r/n确/r/n根据国家质量技术/r/n发布的《中国/r/n动参数区划图/r/n（/r/nGB18306-2001/r/n）及《建筑/r/n抗/r/n/r/n/r/n本/r/n加/r/n速/r/n度/r/n为/r/n/r/n0.10g/r/n，/r/n建/r/n筑/r/n场/r/n地/r/n类/r/n别/r/n属/r/nⅢ/r/n类/r/n，/r/n设/r/n计/r/n特/r/n征/r/n周/r/n期/r/n值/r/n/r/nT/r/ng/r/n=0.45s/r/n，/r/n设/r/n计/r/n分/r/n组/r/n为/r/n第/r/n一/r/n组/r/n。/r/n根/r/n据/r/n《/r/n建/r/n筑/r/n工/r/n程/r/n抗/r/n震/r/n设/r/n防/r/n分/r/n类/r/n标/r/n准/r/n（/r/nGB50223—2008/r/n）/r/n规/r/n定/r/n，/r/n本工程大商/r/n业/r/n部/r/n饱/r/n和/r/n土/r/n液/r/n化/r/n20m/r/n（/r/n2-/r/n（/r/n2-4/r/n范围。因此，综合判别本场地无可液化饱和土。/r/n软/r/n土/r/n的/r/n震/r/n陷/r/n（/r/nJGJ/r/n/r/n94/r/n－/r/n2008/r/n）的规定，对于桩基础，在进行单桩负摩阻力标准值计算时，中性点以上土层/r/n的负摩阻力系数ζ/r/nn/r/n，淤泥、淤泥质土建议ζ/r/nn/r/n0.20/r/n0.30/r/n0.40/r/n。/r/n

/r/n6/r/n、/r/n不/r/n良/r/n地/r/n质/r/n作/r/n用/r/n及/r/n特/r/n殊/r/n性/r/n岩/r/n不/r/n良/r/n地/r/n质/r/n作/r/n用/r/n概/r/n溶、土洞等不良地质现象。本场地处于广州潜在震源区⑥，有发生≤/r/n6/r/n/r/n级/r/n的潜在可能性。/r/n特/r/n殊/r/n性/r/n岩/r/n石及建筑/r/n。回填时间较长，已完成自重固结/r/n相沉积层，土层种类以软土为主，土的物理力学性质差，且差异性大，地表硬壳层（/r/n根据土工测试资料统计，第（/r/n2-2/r/n）层淤泥天然含水量/r/nω/r/n0/r/n62.4%/r/n87.8%/r/n；第（/r/n2-5/r/n）层淤泥天然含水量/r/nω/r/n0/r/n57.7%/r/n67.9%/r/n。/r/ne/r/n0/r/n=1.252/r/n～/r/n1.909/r/n1.612/r/n。/r/n（/r/n2-2/r/na/r/nv/r/n=0.63/r/n～/r/n2.69MPa/r/n-1/r/n，平均/r/n1.29MPa/r/n-1/r/n，属高压缩性土层；第（/r/n2-4/r/n）层淤泥测得压缩系数/r/na/r/nv/r/n=0.81/r/n～/r/n1.68MPa/r/n-1/r/n，平均/r/n1.18MPa/r/n-/r/n1/r/n（/r/n2-2/r/n3./r/n9/r/nk/r/nPa/r/n3/r/n.6k/r/nP/r/na/r/n3/r/n./r/n4/r/n/r/n3./r/n1/r/n/r/n23.0kPa/r/n0.7kPa/r/n，摩擦角平均/r/n1.9/r/n度，标准值/r/n=10.8/r/n度。/r/n第（/r/n2-4/r/n）/r/n5.5kPa/r/n4.5kPa/r/n3.2/r/n/r/n土工测试表明，本项目第（/r/n2-2/r/n）/r/n层淤泥的垂直固结系数/r/nC/r/nv/r/n=1.50E-04/r/n～/r/n5.50E-/r/n

/r/n10/r/n（/r/n1/r/n～/r/nC12/r/n（/r/n-2/r/n层淤泥的锥尖阻力/r/nq/r/nc/r/n0.73/r/na/r/n0.41/r/na/r/n0.50/r/na/r/nf/r/ns/r/n8.55kPa/r/n、最小/r/n值/r/n5.34kPa/r/n、算术平均值/r/n6.86kPa/r/n。详尽/r/n参考附件之专题报告《双桥静力触探原位/r/n根/r/n据/r/n现/r/n场/r/n/r/n4/r/n/r/n个/r/n板/r/n剪/r/n切/r/n试/r/n验/r/n孔/r/n/r/n68/r/n/r/n次/r/n的/r/n试/r/n验/r/n成/r/n果（/r/n剔/r/n除/r/n异/r/n常/r/n值/r/n第（/r/n2-2/r/n）/r/n层/r/n淤/r/n泥/r/n的/r/n原/r/n状/r/n土/r/n不/r/n排/r/n水/r/n抗/r/n剪/r/n强/r/n度/r/n/r/nC/r/nu/r/n/r/n最/r/n大/r/n值/r/n/r/n45.60kPa/r/n、/r/n最/r/n小/r/n值/r/n/r/n29.30kPa/r/n、/r/n算/r/n术/r/n平/r/n均/r/n值/r/n/r/n35.21kPa/r/n、标准/r/n值/r/n/r/n34.4kPa/r/n；/r/n重/r/n塑/r/n土/r/n抗/r/n剪/r/n强/r/n度/r/n/r/nC/r/nu/r/n’/r/n最/r/n大/r/n值/r/n/r/n14.20kPa/r/n、/r/n最/r/n小/r/n值/r/n/r/n7.20kPa/r/n、/r/n算/r/n术/r/n平/r/n均/r/n值/r/n/r/n11.18kPa/r/n、/r/n标/r/n准/r/n10.9kPa/r/n。/r/n灵/r/n敏/r/n度/r/n/r/nS/r/nt/r/n=2.5/r/n～/r/n4.1/r/n，算/r/n术/r/n平/r/n均/r/n值/r/n/r/n3.2/r/n，/r/n标/r/n准/r/n值/r/n/r/n3.1/r/n。详尽/r/n参/r/n考/r/n参/r/n考/r/n附/r/n件/r/n之/r/n专/r/n题/r/n7/r/n、/r/n基/r/n坑/r/n开/r/n挖/r/n支/r/n护/r/n评/r/n价/r/n和/r/n工/r/n程/r/n措/r/n施/r/n建/r/n土/r/n石/r/n工/r/n程/r/n分/r/n级/r/n及/r/n围/r/n岩/r/n根/r/n据/r/n本/r/n项/r/n目/r/n岩/r/n土/r/n工/r/n程/r/n勘/r/n察/r/n资/r/n料/r/n，/r/n参/r/n考/r/n《/r/n铁/r/n道/r/n、/r/n轻/r/n轨/r/n交/r/n通/r/n岩/r/n土/r/n工/r/n程/r/n勘/r/n察/r/n规/r/n范/r/n（/r/nGB/r/n50307-1999/r/n）/r/n4.3/r/n、/r/n4.4/r/n4.3.1/r/nB/r/n7.1-1/r/n表/r/n7.1-/r/n /r/n基坑开挖围岩分类和土、石可挖性分级/r/nⅠ/r/nⅠ/r/n（2-/r/n软塑～/r/nⅠ/r/nⅠ/r/n（2-2-/r/nⅠ/r/nⅠ/r/n（2-2-/r/nⅠ/r/nⅠ/r/n（2-/r/n软塑～/r/nⅠ/r/nⅠ/r/n（2-2-/r/nⅠ/r/nⅠ/r/n（2-2-/r/nⅠ/r/nⅠ/r/n（2-/r/nⅠ/r/nⅠ/r/n（2-/r/n松散～/r/nⅠ/r/nⅠ/r/n（2-/r/nⅠ/r/nⅠ/r/n（2-/r/nⅠ/r/nⅠ/r/n（2-/r/n稍密～/r/nⅠ/r/nⅠ/r/n（3-/r/nⅠ/r/nⅠ/r/n10/r/n-/r/n7/r/n/r/n数量级，属微～/r/n基/r/n坑/r/n工/r/n程/r/n评/r/n本次勘察范围最大设/r/n2/r/n层/r/n室，/r/n室基坑开挖深度约/r/n12m/r/n。场地东、南、西面分别为/r/n4/r/n号线高架桥通过，周边管线复/r/n工/r/n程/r/n措/r/n施/r/n建/r/n根据工程勘察，开挖范围内岩土层主要为第（/r/n1/r/n）层人工填土、第（/r/n2-1/r/n）/r/n程支护结构选型建议选用/r/n/r/n连续墙加内支撑的支护型式。/r/n/r/n

/r/n可兼做/r/n室外墙，做到三墙合一，可节省工期，但造价高/r/n7.3-1/r/n。/r/n⑦基坑开挖时应确保周围建筑物及/r/n管线的安全/r/n序/r/n状/r/n剪/r/n序/r/n状/r/n剪/r/n切/r/n指标/r/n建/r/n议/r/n凝/r/n聚/r/n内/r/n摩/r/n号/r/n名/r/n/r/n态/r/nφ/r/n号/r/n名/r/n/r/n态/r/nφ/r/nφ/r/nc/r/n角/r/nm/r/n°/r/n°/r/n°/r/n(2-/r/n软塑～/r/n(2-2-/r/n(2-2-/r/n(2-/r/n松散～/r/n(2-/r/n松散～/r/n(2-/r/n(2-/r/n(2-/r/n稍密～/r/n(3-/r/n(3-/r/n中密～/r/n（/r/n2/r/n）/r/n项/r/n目/r/n设/r/n计/r/n阶/r/n段/r/n当/r/n未/r/n进/r/n行/r/n单/r/n桩/r/n抗/r/n拔/r/n承/r/n载/r/n力/r/n特/r/n征/r/n值/r/n/r/nR/r/nta/r/n/r/n可/r/n按/r/n下/r/n式/r/n计/r