陈毅　梁永哲　刘大翔等

摘要：为了修复雅砻江两河口水电站工区受损陆地边坡，通过对植被混凝土掺入不同质量配比的棕纤维和黄麻纤维进行冻融循环试验。结果表明，植被混凝土的质量损失率随冻融循环次数的增加呈线性增加，相对质量损失率随冻融循环次数的增加呈先增大后减小的趋势；质量损失率和相对质量损失率随着掺入纤维质量比的增加均呈先增大后减小的趋势，当棕纤维和黄麻纤维的质量配比分别为0.6%和0.9%时，损失均最小；同时对植被混凝土的质量损失率和相对质量损失率的计算结果分别对两种纤维做敏感性分析，表明棕纤维的敏感性高于黄麻纤维。

关键词：植物纤维；冻融循环；植被混凝土；最优配比

中图分类号：TU528.572 文献标识码：A 文章编号：0439-8114（2015）19-4840-04

DOI：10.14088/j.cnki.issn0439-8114.2015.19.048

Abstract： In order to repair the damaged slope land in Yalong River Lianghekou hydropower station work area， the freeze-thaw cycle experiment was conducted through mixing the vegetation-growing concrete with palm fiber and jute fiber of different quality ratio. The results showed that mass loss rate of the vegetation-growing concrete linearly increased with the increase of freeze-thaw cycles， relative mass loss rate with the increase in the number of freeze-thaw circulation firstly increased and then decreased； mass loss rate and relative mass loss firstly increased and then decreased with the increase of doped fiber quality， when the quality ratio of paln fiber and jute fiber were 0.6% and 0.9% respectively， losses were minimal. At the same time， by the quality of the vegetation-growing concrete loss rate and relative mass loss of the calculation results， the sensitivity analysis for two kinds of fibers were conducted， the results showed that the sensitivity of the palm fiber was higher than that of jute fiber.

Key words： plant fiber； freeze-thaw cycle； vegetation-growing concrete； optimal ratio

雅砻江两河口水电站工区由于受工程扰动影响，毁损了大面积原有的边坡植被，造成众多岩石裸露边坡亟待修复。当前，国内外修复岩质边坡一般先在坡面铺设生态基材，营造植物生长环境，然后再进行植被修复。受当地气候以及地理位置所限，工区高差巨大，冬季边坡土壤存在明显冻融现象，生态基材也难以避免。在冻融循环过程中，由于生态基材中的水分不断结晶、融化以及迁移，引起基材体积发生胀缩演替，造成其内部以及表观一系列的微裂，进而使基材不断地剥落，最终导致生态基材内部结构失稳[1，2]。

为提高生态基材或边坡土体结构的整体稳定性，国……