水电基础局自1959年在北京密云水库创建中国首道槽孔型混凝土防渗墙以来，积累了极其丰富的槽孔型防渗墙经验，是水利、水电行业防渗墙施工规范的主编单位，是相关国家级工法的完成单位。参与了三峡、葛洲坝、向家坝等一批世界级水电站防渗墙工程建设，经过多年的技术创新，公司超深和复杂地质条件下防渗墙建造技术，达到国际领先水平。相关技术还在国内外其它数百项水利水电程中应用，并推广到交通、市政、矿山、环保工程等多个领域。
重点代表项目如下：
Since completion of the China's first trench concrete cutoff wall at Miyun Reservoir in Beijing in 1959, Sinohydro Foundation Engineering Co., Ltd. has accumulated extremely rich experience in trench cutoff walls. It is the chief compiling unit of Specification of cutoff wall for the water conservancy and hydropower industries and the completion unit of relevant national-level construction methods. It has participated in the construction of cutoff wall of a number of world-class hydropower stations such as the Three Gorges, Gezhouba, and Xiangjiaba. After many years of technological innovation, the company's technology for constructing cutoff walls under ultra-deep and complex geological conditions has reached the leading level in the world. Relevant technologies have also been applied in hundreds of other domestic and foreign water conservancy and hydropower projects and extended to multiple fields such as transportation, municipal administration, mining, and environmental protection projects.
Key typical projects are as follows:
北京密云水库
Miyun Reservoir in Beijing
1960年建成，墙厚0.8米，最大深度44米，防渗面积2.5万平方米，是中国水利建设史上第一道槽孔型防渗墙，荣获国家创造发明特等奖。
The Miyun Reservoir, with a wall thickness of 0.8 meters, a maximum depth of 44 meters, and a seepage control area of 25,000 square meters, was completed in 1960. It is the first trench cutoff wall in the history of China's water conservancy construction and won the special prize for national creative inventions.
长江三峡水利枢纽
Three Gorges Hydropower Station
在长江三峡水利枢纽建设中，承担了一期、隔流堤、二期上游围堰混凝土防渗墙和三期围堰自凝灰浆防渗墙，最大深度73.5米，累计完成防渗墙14.1万平方米。
In the construction of the Three Gorges Project on the Yangtze River, Sinohydro Foundation Engineering Co., Ltd has undertaken the phase I project, the cofferdam for river diversion, the concrete cut-off wall of the upstream cofferdam in phase II and the self-hardening cement-bentonite cut-off wall in phase III cofferdam.The maximum depth of cutoff wall is 73.5 meters and the total area have been completed is141,000 square meters.
三峡二期围堰是三峡水利枢纽8项重点技术难题之一，防渗墙为当时综合难度最大、工期最紧、地质最复杂，被称为大江截流后决定工程进展的“水下生命线”。工程尚未竣工的基坑抽水期间，成功经受住1998年长江8次洪峰考验，防渗效果卓越。国内首次应用液压铣槽机，实践出“铣抓钻”“铣砸爆”等多种机械设备综合成槽施工工艺。此后，液压铣槽机在国内得到大范围应用。2005年，《长江三峡二期上游围堰防渗墙施工技术研究与工程实践》荣获国家科技进步二等奖。“长江三峡枢纽工程”2011年获百年百项杰出土木工程奖，2019年获国家科技进步特等奖。
The cofferdam in phase II of the Three Gorges Project is one of the eight key technical problems of the Three Gorges Hydropower Station project. The cut-off wall, with the greatest comprehensive difficulty, the tightest construction period and the most complex geology at that time, is called the "underwater lifeline" that determines the progress of the project after the closure of the Yangtze River. During the pumping period of the foundation pit before the project is completed, it successfully withstood the tests of eight flood peaks of the Yangtze River in 1998, and the seepage control is excellent. For the first time in China, hydraulic trench cutters are applied, and construction technologies such as "milling-grabbing-drilling" and "milling-smashing-blasting" for excavation by multiple mechanical equipments are practiced. Since then, hydraulic trench cutters have been widely used in China. In 2005, "Research and Engineering Practice of Construction Technology for the concrete cut-off wall of the upstream cofferdam in phase II of the Yangtze River Three Gorges Project" won the second prize of the National Science and Technology Progress Award. The "Yangtze River Three Gorges Project" won the Outstanding Civil Engineering Award of One Hundred Years and One Hundred Items in 2011 and the National Special Prize for Science and Technology Progress in 2019.
西藏旁多水利枢
The cutoff wall of the dam foundation for the Pangduo Water Control Project in Tibet
西藏旁多水利枢纽大坝基础防渗墙，墙厚1米，防渗面积12.5万平方米，其中孔深超150米的成墙面积达7.78万平方米。是当时世界防渗墙施工史上规模最大、墙体最深、难度最大的防渗墙工程。创防渗墙墙体最深201.47米、水下混凝土浇筑201.47米、连接槽段拔管最深158米等三项世界纪录。公司《超深与复杂地质条件混凝土防渗墙关键技术》荣获国家科技进步二等奖。
The cutoff wall of the dam foundation for the Pangduo Water Control Project in Tibet has a cutoff wall with thickness of 1 meter and an seepage control area of 125,000 square meters. Among them, the wall area with a hole depth of more than 150 meters reaches 77,800 square meters. It is the largest, deepest and most difficult cutoff wall in the history of cutoff wall construction in the world at that time. It has set three world records: the deepest cutoff wall of 201.47 meters, the deepest concrete pouring of 201.47 meters by tremie method, and the deepest extraction of stop end of 158 meters. The company's "Key Technologies of Concrete Cut-off Wall under Ultra-deep and Complex Geological Conditions" won the second prize of the National Science and Technology Progress Award.
江西长江干流江岸与堤防加固整治工程
Main stream riverbank and embankment reinforcement andrenovation of Yangtze River in Jiangxi province
建设江西长江干流江岸与堤防加固整治工程，在芙蓉堤段建成的防渗墙，墙体厚仅0.14米，是国内第一道最薄地下连续墙。其中1999年建成的下游九江段，和2001年建成的湖北黄冈段，分别获中国水利优质工程大禹奖，“长江重要堤防整治加固工程”2011年获百年百项杰出土木工程奖。在工程建设中，中国水电基础局被温家宝同志赞誉为“基础处理王牌军”。
For the construction of the Yangtze River main stream riverbank and embankment reinforcement and renovation project in Jiangxi province, the cutoff wall built in the Furong embankment section has a wall thickness of only 0.14 meters, which isthe thinnest diaphragm wall in China. The downstream Jiujiang section completed in 1999 and the Huanggang section of Hubei completed in 2001 respectively won the Dayu Award for high-quality Water Control Projects in China. The "Yangtze River important embankment renovation and reinforcement project" won the Outstanding Civil Engineering Award of One Hundred Years and One Hundred Items in 2011. During the project construction, Sinohydro Foundation Engineering Co., Ltd. was praised as the "iron army of foundation treatment" by Prime minister Wen Jiabao .
云南红石岩堰塞湖整治工程
Hongshiyan quake lake regulation project in Yunnan province
红石岩堰塞湖整治工程堰塞体防渗墙，最大墙深137.34米，墙厚1.2米，防渗面积31371.8平方米。在规模庞大的滑坡崩塌体中，成功建造超百米深完整可靠的防渗体系，开创了堰塞坝除害兴利、变废为宝的先例，在国际学术和工程界产生了重要影响。
For the cutoff wall of the barrier body in the Hongshiyan quake lake regulation project, the maximum wall depth is 137.34 meters, the wall thickness is 1.2 meters, and the seepage control area is 31,371.8 square meters. In the massive landslide and collapse mass, a complete and reliable seepage control system with a depth of over 100 meters has been successfully constructed, creating a precedent for turning barrier dams from harmful to beneficial and turning waste into treasure, and has had an important impact in the international academic and engineering fields.
新疆大河沿水利枢纽
Daheyan Water Control Project in Xinjiang
在新疆维吾尔自治区重点水利工程——大河沿水利枢纽工程中建成水库大坝基础防渗墙，连续多幅墙深超过180米，最大墙深186.15米。深墙孔斜率成功控制在2‰，远优于行业孔斜率6‰的标准，达到世界领先水平。
In the Daheyan Water Control Project, a key water control project in the Xinjiang Uygur Autonomous Region, a cutoff wall for the foundation of the dam has been completed. The depth of multiple consecutive panels exceeds 180 meters, and the maximum wall depth is 186.15 meters. The hole inclination rate of deep walls has been successfully controlled at 2‰, which is far better than the industry standard of 6‰ and reaches the world-leading level.
黄河小浪底水利枢纽
Yellow River Xiaolangdi Water Control Project
黄河小浪底水利枢纽上游围堰、右岸主坝防渗墙建成总防渗面积2.4万平方米。主坝防渗墙墙厚1.2米，深81.9米，深度创当时国内之最。混凝土强度高达35兆帕，为国内之最。“黄河小浪底水利枢纽工程”2009年获中国水利优质工程大禹奖，2011年获中国建设工程鲁班奖、百年百项杰出土木工程奖。
The total seepage control area of the cutoff wall of upstream cofferdam and the right bank of the main dam of the Yellow River Xiaolangdi Water Control Project is 24,000 square meters. The cutoff wall main dam is 1.2 meters thick and 81.9 meters deep, setting the deepest record in China at that time. The concrete strength is up to 35 MPa, also the highest in China. The "Yellow River Xiaolangdi Water Control Project" won the Dayu Prize for high-quality Water Control Projects in China in 2009, and the Luban Prize for China Construction Projects and the Outstanding Civil Engineering Award for 100 Years and 100 Projects in 2011.
葛洲坝水利枢纽
Gezhouba Water Control Project
“万里长江第一坝”——葛洲坝水利枢纽大江围堰防渗墙，最大深度47.3米，防渗面积超7万平方米，防渗墙规模为当时国内之最。
The cutoff wall of the cofferdam of the Gezhouba Water Control Project, known as "the first dam on the Yangtze River", has a maximum depth of 47.3 meters and an -seepage control area of over 70,000 square meters. The scale of the cutoff wall was the largest in China at that time.
在葛洲坝大江围堰防渗墙中首次试验“接头管法”，首次引进日本“真砂”液压导板抓斗挖槽机。1982年，接头管法纳入国家“六五”科技攻关项目，研制出我国第一台BG200/900型大型液压拔管机。
The "joint pipe method" was first tested in the cutoff wall of the cofferdam of Gezhouba. The Japanese "Masago" hydraulic guide plate grab was introduced for the first time. In 1982, the joint pipe method was included in the scientific and technological research project of the national "Sixth Five-Year Plan" , and China's first BG200/900 large hydraulic pipe extraction machine was developed.
四川金沙江向家坝水电站
Xiangjiaba Hydropower Station on Jinsha River in Sichuan
在国内第五大水电站——四川金沙江向家坝水电站工程中建成一期围堰防渗墙，最大墙深81.8米。月成槽15661平方米，月成墙23820.46平方米，月浇筑23485.5立方米，施工强度创国内之最。
Sinohydro Foundation Engineering Co., Ltd. completed the first-phase cofferdam cutoff wall in the Xiangjiaba Hydropower Station project on the Jinsha River in Sichuan, the fifth largest hydropower station in China. The maximum wall depth is 81.8 meters. The monthly trench excavation area is 15,661 square meters, the monthly wall completion area is 23,820.46 square meters, and the monthly concrete pouring volume is 23,485.5 cubic meters. The construction intensity is the highest in China.
四川冶勒水电站
Yele Hydropower Station in Sichuan
四川冶勒水电站坝体右岸廊道，最大墙深110米，是世界首次运用液压铣槽机在廊道内修建防渗墙。
The maximum depth of the cutoff wall in the tunnel on the right bank of the dam body of Yele Hydropower Station in Sichuan is 110 meters. It is the first time to use a hydraulic trench cutter to build an cutoff wall in the tunnel in the world.
新疆下坂地水利枢纽
Xiabandi Water Control Project in Xinjiang
新疆下坂地水利枢纽最大墙深102米。以预埋灌浆管深度100米、接头管起拔深度72.7米和试验段墙体深度102米，创当时三项全国之最。中国的基础防渗工程设计、试验与施工技术达到国际领先水平。
The maximum wall depth of the Xiabandi Water Control Project in Xinjiang is 102 meters. The embedded grouting pipe depth of 100 meters, the joint pipe extraction depth of 72.7 meters, and the wall depth of the test section of 102 meters created three national records at that time. Seepage control design, testing and construction technology in China has reached the international leading level.
广东岭澳核电站一期堆石防波堤
Rubble breakwater of Ling'ao Nuclear Power Station Phase I in Guangdong
广东岭澳核电站一期堆石防波堤由海中抛填块石、巨石堆积而成，孔隙率达40%，施工受海浪、潮汐影响，极易塌孔。在此类地层中建造混凝土防渗墙，为国内首次。
The rubble breakwater of Ling'ao Nuclear Power Station Phase I in Guangdong is formed by piling up riprap and boulders thrown into the sea. The porosity is up to 40%. The trench excavation is easily affected by waves and tides. Building a concrete cutoff wall in such strata is the first time in China.
目前，国内大坝地连墙（防渗墙）深度百米以上共计19道，全部由水电基础局承建，同时保持着264.08米的地连墙最深世界纪录。
At present, there are a total of 19 diaphragm walls (cutoff walls) with a depth of more than 100 meters for dams in China. All of them are constructed by Sinohydro Foundation Engineering Co., Ltd. At the same time, the company holds the world record for the deepest diaphragm wall of 264.08meters.
来源：中国水电基础局有限公司