【摘要】 研究目的：随着“两山论”和“双碳”理念的提出，铁路工作者逐渐重视高陡路基边坡的绿化问题。针对铁路高陡路基边坡的绿色支护难题，设计坡率为1∶0.5的高陡路堑边坡双级格构式锚杆基材植生（生态袋）支护结构，并开展涵盖4个断面的现场原位试验研究，测试内容包括地表和深层位移、边坡岩土体和支挡结构及锚固体应力、孔隙水压力等，以验证其应用效果。研究结论：（1）格构式锚杆支护结构路基边坡总体上一至四级边坡深层位移均不大，格构式锚杆陡边坡变形在10 mm以内；（2）各测点土压力最大约45 kPa，比主动土压力略低，土压力沿高度分布呈S曲线型；（3）锚杆受力沿高度呈中部大、两头小的分布形式，大小为20～90 kN，中部锚杆受力与设计值相当，两头锚杆受力为设计值的1/3～1/2;(4)三级边坡的锚索锚固力大小在80～110 kN之间，不同高度锚索受力差别不大，四级边坡不同高度锚索受力差异较大，锚索受力实测值为设计值的1/3～1/2;(5)路基边坡绿色植物坡面覆盖率超88%，实现了坡率1∶0.5的高陡路基边坡的全坡面绿色支护；（6）本研究成果可为陡路堑边坡的绿色防护提供参考并为规范的修编提供借鉴。更多还原

【Abstract】 Research purposes: With the proposal of "Two Mountains Theory" and "Double Carbon" concept, railway workers have gradually paid attention to the greening of high and steep subgrade slopes. Aiming at the green support problem of high and steep railway subgrade slope, a two-stage lattice anchor base material planting(ecological bag) support structure with a slope ratio of 1∶0.5 was designed for high and steep cutting slope, and in-situ tests covering four sections were carried out, including surface and deep displacement, slope rock and soil mass, support structure and anchor stress, pore water pressure, etc., to verify its application effect. Research conclusions:( 1) On the whole, the deep displacement of the first to fourth grade slope of the subgrade slope with lattice anchor support structure is small, and the deformation of the steep slope with lattice anchor support structure is within 10 mm.(2) The maximum earth pressure at each measuring point is about 45 kPa, which is slightly lower than the active earth pressure, and the distribution of earth pressure along the height is S-curve.(3) The stress of the anchor rod is distributed in the form of large values in the middle and small values at both ends along the height, which is 20～90 kN. The stress of the anchor rod in the middle is equivalent to the design value, and the stress of the anchor rod at both ends is about 1/3～1/2 of the design value.(4) The anchoring force of the anchor cable of the third grade slope is between 80～110 kN, and the stress difference of the anchor cable at different heights is small. The stress difference of the anchor cable at different heights of the fourth grade slope is large, and the measured value of the stress of the anchor cable is about 1/3～1/2 of the design value.(5) The green vegetation coverage rate of the subgrade slope is over 88%, and the full slope green support of high and steep subgrade slope with a slope ratio of 1∶0.5 is realized.(6) The research results can provide a reference for the green protection of steep cutting slopes and basic data for the revision of the specification.更多还原