The Himalayan ranges are well known for active and incessant slope failures. The network of highways and local roads in the region is under sustained threat of potential fatal landslides. Urban sprawl and increased human intervention increased the vulnerability and probability of sliding to manifolds. Tampering the fragile conditions of the sensitive Himalayan orogen may generate new avenues of slope failures. Road widening and development projects have a close association with slope failures. However, such landslides can be coped with proper geotechnical planning and execution. The slopes along national highway-58 (NH-58) are being excavated for road widening. Large numbers of steep and unstable cut sections were visible soon after the excavation along the highway. The geotechnical assessment has been undertaken to determine stable slope geometry. The profile of existing slopes is modified by creating benches, and safety factor was determined at different overall angle. The optimization of slope geometry suggests that most of the unstable slope may have safety factor of 1.5, by creating benches of 10 m (height), 5 m (span), at an angle of 65°. It can also be inferred from the analysis that the safety factor may be improved from 11.5 to 32.2% for each 5° reduction in the overall slope angle. Certain adverse impacts and future projections of inadequately performed road widening were also discussed in the paper.

中文翻译：

---

通过优化几何形状来稳定公路沿线的切割斜坡，NH-58，小喜马拉雅

喜马拉雅山脉以活跃和不断的斜坡崩塌而闻名。该地区的高速公路和地方道路网络持续受到潜在致命山体滑坡的威胁。城市扩张和人类干预的增加增加了滑向歧管的脆弱性和可能性。篡改敏感的喜马拉雅造山带的脆弱条件可能会产生新的斜坡破坏途径。道路拓宽和开发项目与边坡失稳密切相关。然而，此类山体滑坡可以通过适当的岩土工程规划和执行来应对。正在开挖 58 号国道 (NH-58) 沿线的斜坡以拓宽道路。沿公路开挖后不久就可以看到大量陡峭和不稳定的切割部分。已进行岩土工程评估以确定稳定的斜坡几何形状。通过创建长凳来修改现有斜坡的轮廓，并在不同的整体角度确定安全系数。斜坡几何结构的优化表明，通过以 65° 的角度创建 10 m（高度）、5 m（跨度）的长凳，大多数不稳定斜坡的安全系数可能为 1.5。由分析还可以推断，整体坡度每减少5°，安全系数可从11.5%提高到32.2%。该文件还讨论了道路拓宽不充分的某些不利影响和未来预测。以 65° 的角度。由分析还可以推断，整体坡度每减少5°，安全系数可从11.5%提高到32.2%。该文件还讨论了道路拓宽不充分的某些不利影响和未来预测。以 65° 的角度。由分析还可以推断，整体坡度每减少5°，安全系数可从11.5%提高到32.2%。该文件还讨论了道路拓宽不充分的某些不利影响和未来预测。