输电线路塔基全风化花岗岩坡面径流冲刷侵蚀试验研究  

Runoff Scouring Experiments of Completely Weathered Granite of the Foundations of Electric Transmission Line Towers

作　　者：李鹏云[1] 段华雍 韦立德[3] 张峰[4] 柳玉波[5] 

机构地区：[1]广东电网公司电力科学研究院,广州510600 [2]南昌航空大学,南昌330063 [3]中国科学院岩土力学研究所,武汉430071 [4]广东电网公司,广州510600 [5]广东电网公司韶关供电局,广东韶关512026

出　　处：《中国农村水利水电》2013年第3期150-152,159,共4页China Rural Water and Hydropower

基　　金：南方电网公司科技项目(K-GD2011-411)

摘　　要：经现场调查发现全风化花岗岩塔基的主要破坏形式之一为坡面冲刷,而目前全风化花岗岩坡面冲刷实验还没有相关报道。通过径流冲刷试验,研究了输电线路塔基全风化花岗岩边坡坡面冲刷的变化规律,并应用侵蚀模数的概念来评价坡面的抗侵蚀能力。同一种土体不同干密度冲刷试验结果表明,对于不同干密度的全风化花岗岩边坡干密度越大冲刷量越小;对于一定干密度的全风化花岗岩冲刷量随着时间的增加而增加,当坡面形成冲沟时冲刷量明显变大并最后趋于稳定;通过不同土体冲刷实验发现了两种极容易冲刷土体。Field investigation shows that slope scouring is one of the completely weathered granite slope hazards under electric trans mission line towers. And the fruit of scouring experiments on completely weathered granite slope has not been reported at present. The erosion characteristic of completely weathered granite of the foundations of electric transmission line towers is explored based on the runoff scouring experiments in this paper. And the anti-erosion capability of soil is analyzed with soil erosion rate. The following conclusion is got from the result of runoff scouring experiment on the soil with different densities. The scouring amount decreases with increased dry density. The scouring amount increases with test time. The scouring amount increases obviously when gullies come into being, and it is asymptotically stable at last. And two kinds of soils very easy to scour are found based on the runoff scou ring experiments on different kinds of soil.

关 键 词：输电线路塔基 全风化花岗岩 径流冲刷试验 冲刷量 

分 类 号：TU44[建筑科学—岩土工程] P334.2[建筑科学—土工工程]