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1、(8)行业标准建筑地基处理技术规范(JGJ79-2012)；(9)行业标准高层建筑岩土工程勘察标准(JGJ/T72-2017)；(10)行业标准建筑桩基技术规范(JGJ94-2008)；（三）行业标准建筑基坑支护技术规程(JGJI20-2(H2);(12)行业标准建筑工程地质勘探与取样技术规程(JGJ/T87-2012)；(13)省标建筑地基基础设计规范(DBJ15-31-2016)；(14)省标建筑基坑支护工程技术规程(DBJ“15-20-2016)；(15)省标岩溶地区建筑地基基础技术规范(DBJ/T15-136-2018)；(16)建筑工程地质钻探技术标准(JGJ87-92)o(17)房
2、屋建筑和市政基础设施工程勘察文件编制深度规定(2020版)。(三)勘察方法、技术要求及勘察工作量1、勘察方法与技术要求(1)勘察方法钻探施工采用XY-IOo型油压钻机，采用泥浆、套管护壁，合金、金刚石钻头回转钻进，开、终孔口径分别为110mm、91mm,钻孔位置由委托方施工管理人员测定，孔口标高由委托方提供。(2)技术要求钻探孔深要求：拟采用冲孔灌注桩桩基施工，以2层微风化灰岩作为桩端持力层，钻探深度进入2层微风化灰岩深度不小于3.0d+0.5m(d为桩径)且不小于6m,必须进入完整的微风化岩。如遇溶洞,超前钻孔应穿过溶洞进入连续稳定2层微风化灰岩不小于6m,以确保持力层满足三倍桩径以上。对于
3、邻近孔位溶洞或完整岩面变化较大区域应上报设计咨询是否加孔详细查明地一、前言(一)工程概况拟建湾区西部华侨城二期(R(H地块)D6栋超前钻工程位于肇庆市肇庆新区，砚阳大道与新安大道交汇处北侧地块，属肇庆盆地河流冲积隐伏岩溶地貌，下伏基岩为石炭系灰岩(C)。本次勘察为拟建湾区西部华侨城长利大道以西ROl地块D6超前钻勘察，拟采用钻(冲)孔桩基础，桩端持力层为微风化灰岩，桩径为01000mm、O1100mm、O1200mm。受肇庆华侨城小镇实业发展有限公司的委托，我院承接了其拟建湾区西部华侨城二期(ROl地块)D6栋超前钻勘察任务。(二)勘察目的、任务要求和依据的技术标准1、勘察目的、任务要求本次勘
4、察目的任务是查明各桩桩位岩面埋深及持力层微风化灰岩中溶洞的发育情况，确保进入桩端下不小于3.0d+0.5m(d为桩径)且不小于6m,必须进入完整的微风化岩。并提出未来基础施工应注意的问题、处理措施建议，为桩基础设计、施工提供岩土工程地质依据。2、执行技术标准(1)国标岩土工程勘察规范(GB50021-2001)2009年版；(2)国标建筑地基基础设计规范(GB50007-2011)；(3)国标建筑抗震设计规范(GB50011-2010)(2016版)；(4)国标建筑工程抗震设防分类标准(GB50223-2008)；(5)国标中国地震动参数区划图(GB18306-2015)；(6)国标土工试验方
5、法标准(GB/T50123-2019)；(7)国标工程岩体分级标准(GB50218-2014)：钻孔编号钻探深度(m)岩面(m)坐标地面高程(m)备注X(m)Y(m)D6-2533.6415.802567142.934110232.4901.16D6-2632.3015.802567144.951110233.7891.14D6-2743.5515.102567143.443110235.6721.25D6-2831.6014.602567147.906110232.8961.13D6-2931.7015.102567145.645110235.4841.21D6-3028.7014.3025
6、67147.041110236.9181.17D63130.7014.702567149.377110239.0161.18D6-3238.0014.202567152.786110238.8931.13D6-3338.0622.102567151.704110240.5741.19D6-3436.9821.802567157.940110241.9721.19D63531.4015.902567156.556110243.9361.22D63633.5222.892567159.332110244.0581.22D6-3733.0922.472567157.787110246.2741.18
7、D63835.5013.902567127.635110225.4951.39D63928.3513.202567129.317110226.5781.32D6-4028.5014.252567126.119110227.8501.42D6-4I33.8014.602567127.307110230.1611.43D64231.3015.202567133.292110234.0731.30D6-4335.1715.102567131.398110237.0161.38D6-4434.2519.402567135.885110234.0181.26D64534.5214.602567134.3
8、42110236.4141.32D6-4637.1414.552567137.651110235.1541.25D6-4738.1518.302567136.528110237.8211.33)6-4846.1515.702567136.265110240.4471.32D6-4932.7515.302567138.504110239.093130D6-5044.3515.102567141.771110237.8071.26D6-5133.0014.702567140.648110240.4741.J4D6-5234.0014.602567145.090110238.9331.23D6-53
9、36.0014.602567142.589110240.4151.29D6-5435.5014.602567145.217110242.5231.25D6-5538.3614.052567I52.7S6110242.6661.21D6-5637.6815.852567151.569110244.2931.20D65732.8114.112567150.403110245.9211.19D6-5834.4714.212567152.274110246.7091.17D6-5924.5614.952567153.793110248.0441.13D6-6034.2221.912567156.518
10、110248.4301.13D6-6I32.4014.502567123.524110232.0661.47D66235.4514.632567125.206110233.1481.47D6-6329.1414.952567127.191110234.1291.43D6M36.9821.802567132.485110246.8731.31质分布情况。2、勘察工作布置及完成工作量由委托方提供的设计图纸已布置本次勘察共85个桩位，桩径分别为LoOm、LIom及1.20m,详见图1(桩位超前钻孔分布平面图)。我院接受任务后，于2020年6月9日先后组织了10台XY-100型油压钻机进场施工，于同年
11、11月15日结束外业钻探工作，完成实物工作量如下(详见表1)：表1完成工作量一览表表1钻孔编号钻探深度(m)岩面(m)坐标地面高程(m)备注X(m)Y(Hl)D6-136.8014.702567156.830110221.1581.29D6-234.9717.402567156.930110223.9581.22D6-339.1021.202567154.488110228.2141.20D6-429.4217.852567151.944110232.1661.20D6-538.8021.002567154.505110219.7811.31D6-635.8018.652567154.3531
12、10222.4181.29D6-740.5015.802567152.324110225.5721.15D6-831.2114.212567149.942110229.2711.21D6-938.2018.202567153.046110218.7221.26D6-I037.7016.352567151.364110217.6401.26D6-II36.6514.402567149.542110219.9161.23D6-1232.6316.302567148.712110221.7601.23D6-I334.6018.102567147.425110223.6671.22D6-I441.20
13、16.102567149.947110225.2911.18D6-I528.5516.302567129.854110222.0481.30D6-I628.2314.602567131.863110224.4711.27D6-I728.2015.102567135.001110226.4311.24D6-1828.1015.502567133.918110228.1131.29D6-I928.3015.702567134.136110229.6211.26D6-2032.1218.902567135.980110230.4521.21D6-2134.8517.402567137.788110231.6161.23D6-2234.9015.802567143.140110229.7681.14D6-2333.9414.152567140.9
