耿家庄隧道钢支撑支护施工方案

本文格式为Word版，下载可任意编辑——耿家庄隧道钢支撑支护施工方案

五盂高速马路LJ2合同段

耿家庄隧道钢支撑支护

施工方案

中建市政建设有限公司

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审核：

审批：

2023年5月1日

LJ2合同段

目录

1、工程概况··································································································································································································22、编制依据··································································································································································································33、施工人员、机械设备配置···································································································································································43.1洞身钢支撑支护工程量·························································································································································43.2施工人员配置··········································································································································································43.3机械设备配置··········································································································································································54、施工工艺与流程·····················································································································································································54.1钢支撑支护施工工艺·····························································································································································54.2钢支撑支护施工流程·····························································································································································64.2.1钢支撑支护施工流程图·················································································································································64.2.2钢支撑支护施工具体流程·············································································································································75、质量控制··································································································································································································85.1钢支撑支护质量控制基本要求·············································································································································85.2钢支撑具体质量控制措施·····················································································································································96、安全保证措施·······················································································································································································106.1建立安全保证体系································································································································································106.2安全教育和培训····································································································································································106.3落实安全责任制，制定安全管理的各项规章制度·········································································································116.4钢支撑针对性安全技术措施···············································································································································117、环境保护措施·······················································································································································································127.1组织措施·················································································································································································137.2防止大气污染措施································································································································································137.3防止水污染措施····································································································································································137.4防止施工噪声污染措施························································································································································14

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LJ2合同段

1、工程概况

耿家庄隧道位于五台县耿家庄东侧约100米处，设计为左右线分开式，左线起讫桩号为ZK6+635至ZK7+600，长度为965m，右线起讫桩号为YK6+672至YK7+600，长度为928m，双洞总长为1893m。隧道设计速度为80km/h，为双向四车道，双洞单向行车。隧道主洞建筑界限宽度为10.25m，高度为5.0m。隧道内轮廓净空面积为64.62㎡。本隧道设有3处人行横通道，1处车行横通道。

隧止区位于构造剥蚀、侵蚀低中山区，山体陡峭，冲沟发育。微地貌表现为基岩山脊、冲、沟陡坡等。隧道地形总体北高南低。隧址区范围内植被不发育，以杂草丛及灌木为主。隧址区地处五台山块隆南部之系舟山掀向斜的东南翼，为一单斜构造，地层产状平缓，地质构造简单。勘察期间，未发现有影响洞体稳定性的断裂构造存在。现将各组地层岩性特征及其分布状况简述如下：

第四系统残坡积碎石土

该套地层仅分布于盂县端洞口段及隧址区缓坡处，岩性为碎石土，土质不均，分选差，碎石成份主要为灰岩，菱角状，含30%~40%粉质粘土，局部粉质粘土含量达70%中密。厚度17.60—28.20米。

奥陶系下统白云质灰岩

本隧道左右线洞身围岩主要由该地层组成，岩性为白云质灰岩，灰白色，间夹薄层状泥质条带灰岩、角砾状灰岩。强~微风化，隐晶结构，中厚层状~中薄层状构造。强风化带厚度20~25米，局部大于30米，岩芯以碎石状为主，局部为扁柱状，岩体节理裂隙较发育，呈中薄层状结构，岩体完整性较差；微风化带岩体节理裂隙不发育，呈中厚层状结构，岩体完整性较好。

以上岩层产状为235°∠15°综合洞体埋深和围岩结构、产状等特点分析，本隧道岩体工程地质条件一般。隧道围岩岩土力学指标见表1。

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岩土物理力学指标表表1

饱和弹性模量岩土名称密度（g/cm3）单轴抗压泊松比μ强度Rc104MPa）（MPa）白云质2.71-2.8055.8-78.00.30-0.35灰岩

隧址区地表水系为清水河，水流受季节影响变化较大，冬季仅部分河道有少量休止水，雨季流量较大。洞身范围内无地下水，地下水对隧道洞身无较大影响。根据清水河地表水水质分析报告，隧址区地表水对混凝土无腐蚀性。

隧址区属温带大陆性季风气候区，受大陆性季风影响明显，日照较充足，昼夜温差大，四季明显。年降水量500mm，一般集中在6—9月；年平均气温5℃，1月平均气温-11℃，7月平均气温21℃；霜冻期为9月下旬至次年4月，无霜期约90—150天。

根据《中国地震动参数区划区》（GBJ8306-2023）的有关规定，结合《XX省地震动峰值加速度区划图》和《XX省地震动反应谱特征周期区划图》，区内地震动峰值加速度为0.15g，地震动反应谱特征周期为0.45s，相对应的地震基本烈度为Ⅶ度。

不良地质：隧址区岩溶稍发育，岩溶是隧址区的主要不良地质，岩溶的发育破坏了岩体的完整性，降低了围岩等级，对隧道洞身稳定性影响较大。

2.2-2.51560-35100.5-0.740-42.2Vp(m/s)（×波C（MPa）ψ（°）弹性波纵2、编制依据

（1）有关的工程地质勘察报告

（2）有关设计文件、图纸，中交马路规划设计院有限公司

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（3）《马路建设项目高危工程施工安全强制性要求》，XX省交通运输厅