乌东德水电站左岸地下厂房快速安全开挖支护施工技术（论文）.pdf

132 施 工 技 术 C0NSTRUCTION TECHNOLOGY 2018年 4月上 第47卷 第 7期 DOI：10．7672／s鲥s2O18O70132 乌 东 德 水 电 站 左 岸 地 下 厂 房 快 速 安 全 开 挖 支 护 施 工 技 术 齐 界 夷 ，贺 明 武 ，唐 昭 醒 ，吴 海 涛 ，刘 鹏 科 。 (1．中国葛洲坝集团三峡建设工程有限公司，湖北 宜昌 443002；2．中国三峡建设管理有限公司，北京 100036 3．长江三峡技术经济发展有限公司，北京 100038) [摘要]金沙江乌东德水电站地下厂房结构尺寸大，具有地质条件复杂、支护工程量大、施工干扰大等特点。工程 坚持“动态设计 、本质安全”理念，开挖过程中，根据实际揭露地质条件，及时优化支护参数、调整开挖方法 ，形成设 计 、施工 、监测反馈快速响应体系，顺利完成厂房开挖。开挖过程中通过改进设备和工艺方法等措施 ，极大降低了 施工干扰和安全风险，同时提高了工效 ，加快了施工进度。监测成果显示，围岩变形始终控制在允许范围之内，开 挖完成后，主厂房围岩变形趋于稳定 ，在受工程开工延迟 、增加支护等影响工期滞后 9个月的情况下 ，实现提前 3 个月向混凝土转序。总结了乌东德水电站大型地下厂房施工实践中形成的设计、施工技术。 [关键词]水电站；地下厂房；开挖；支护；施工技术 [中图分类号]TU753 [文献标识码]A [文章编号]1002—8498(2018)07 0132 04 H igh Effi cient Construction Techniques for the Underground Powerhouse of W udongde Hydropower Station in Left Bank QI Jieyi ，HE Mingwu ，TANG Zhaoxing ，WU Haitao。，LIU Pengke (1．China Gezhouba Group Corporation Three Gorges Construction Engineering Co．，Ltd．，Yichang，Hubei 443002，China； 2．China Three Gorges Projects Development Co．，Ltd．，Beijing 100036，China；3．Yangtze Three Gorges Technology&Economy Development Co．，Ltd．，Be ng 100038，China) Abstract：The huge underground powerhouses of Wudongde Hydropower Station refresh several world records．Complex geological conditions，large quantity of support and significant disturbance during excavation pose great challenge to engineers and project managers．Therefore the idea of dynamic design is insisted throughout the project．According to the field geological conditions，the support parameters and methods are optimized in time in order to form a fast response system incorporating design ， construction and monitoring． The equipment and techniques are also improved SO as to minimize disturbance and risk，meanwhile，increase the efficiency．The excavation process is thus accelerated． The monitoring data indicates that the convergence of surrounding rocks is within the permissible range throughout the construction．After excavation the displacement of rocks tends to be stabilized．Although the actual construction period is 9 months longer than the planned period due to delayed start date and increased support，beginning of concrete lining construction is 3 months earlier than planned．A detailed summary of the excavation and support experience in the construction practice of Wudongde underground powerhouse will be a good reference for similar projects． Key words：hydropower station；underground powerhouse；excavation；sup