以土工格室护坡为研究对象,研究了填石路堤生态防护设计方案.基于浅层边坡稳定分析的相关理论,分析了土石界面的稳定性,评价了土工格室对填石路堤坡面的固土效果;明确了土工格室护坡的施工方法及施工要求.通过研究可知,土工格室可改善土石界面结合情况,对填石路堤坡面培土具有较好的加固效果.

针对锚杆(索)在黄土地层中能否起到锚固作用的问题,依托临洮(安家咀)至临夏公路工程,通过理论计算和现场试验对比分析的方法,证明锚杆(索)在黄土地层中能够达到设计要求锚固力,破坏荷载可以达到设计抗拔力1.8 倍以上.

由于黄土地区边坡的"不确定性",实际工程中很多时候锚杆对提高边坡稳定性并没有作用,常常会发生部分甚至全部锚杆并未穿过最危险滑动面的情况[6],因此锚杆长度的确定尤为重要."假定锚杆无限长"将边坡稳定性放在首位,分析时假设锚杆长度为无限长(在分析中总是考虑锚杆作用)并计算需要的自由段长度(锚头至锚杆与滑动面交点间的距离),然后将锚固段置于滑动面的后缘使锚杆穿过滑动面,通过调节锚固力反复迭代,直到达到所需的安全系数要求.该方法能更好地避免实际工程运用中部分锚杆并未穿过最危险滑面的情况出现,从而降低边坡失稳风险.

In view of the contradiction between highway engineering construction and environmental protection, the G1816 Uma Expressway（cooperation to Serlong section）expressway combines the concept of high-quality discovery in the Yellow River Basin in the design process, and adopts plant protection, structure prefabrication, and the use of RPC high-strength new materials in the roadbed design, so that the use of filler slope protection work is reduced by 83%,the use of excavated slope protection is reduced by 100%,and the use of drainage structure is reduced by 77%,minimizing the damage to the environment.