三峡工程移民迁建区灾害地质体改造与利用研究

三峡工程移民迁建区地质环境复杂 ,建设用地严重不足。如何在治理的基础上对滑坡等灾害地质体开发利用是一项风险极大 ,但具非常现实意义的课题。本文论述了预应力锚拉桩在库区大型滑坡防治中的应用成果 ,这种方法不仅能有效地控制滑坡体的稳定性 ,同时 ,也能根据移民工程要求提供适宜的建设用地 ;介绍了注浆方法对库区分布较广的以崩塌、滑坡、岩溶成因为主的崩滑堆积体的改造问题 ,它不仅可以大大降低移民迁建区地基与边坡处理的工程造价 ,也为库区灾害地质体的改造提供了范例 ;弃渣是库区极为突出的环境地质问题 ,不仅危害长江 ,也对移民迁建区构成严重威胁 ,本文介绍了巫山新城等利用加筋土技术处理弃渣 ,并大大增加建设用地的实例 ,由于该挡墙高达 5 6 m,超出了一般意义下的加筋土挡墙范畴 (通常不超过 2 0 m) ,因此出现了前缘筋带断裂和面板脱落问题 ,本文介绍了应用锚管注浆技术进行面板修复的设计 ,为复杂地质条件地区高加筋挡土墙的安全修建提供了经验.

RECONSTRUCTION AND UTILIZATION OF HAZARDOUS GEOMASS AT RELOCATION SITES OF POPULATION FROM THE THREE-GORGES PROJECT SITE

The relocation sites of population from the Three Gorges Project site are in a complicate geo-environment in which the land is insufficient to construct.There ecists high risk to utilize the hazardous geomass, such as landslide though it may be stabilized.But this is very realistic subject. The pre stressed anchoring piles aere used to controll large-scale landslides and creat flats to build. The loose filling and sliding mass is reconstructed with cement grout that can greatly decline the price for foundation and slope stabilization. Excavation waste materials can also affect the course of the Yangtze River and the relocation sites by man-made sliding and debris. The fabric retaining wall with height, 57m in maximimum, is build to store the waste material and makes the land suitable to relocation.