某高速公路边坡锚固参数优化研究

Optimization Study of Bolted Parameters in a Highway Rock Slope

针对某公路岩石高边坡的特点,选取一个典型断面(K123+910断面)作为研究对象,采用传统极限平衡分析方法,对边坡进行了考虑3种支护方案和4种岩体参数共12种工况的计算,对计算结果进行粘聚力C值的参数敏感性分析和锚固效应评价;采用强度折减法对自然边坡、削坡无支护和采取锚固措施后的边坡进行应力、变形、锚杆(索)受力及安全系数的计算分析。从而对该边坡对C值的参数敏感性,临界失稳时的变形、应力、锚杆(索)受力状态及安全系数有了全面的了解和正确的评价。

Based on the characteristic of a rock slope, a typical section- K123 ＋910 is selected, 12 schemes＇ computing considering 3 different support types and 4 different rock properties is conducted by using the classical limit - equilibrium method, the cohesive stress （ C ） parameter＇ s sensitivity and bolting effect are also studied; furthermore, using the strength reduction method, the nature slope, non supported slope and supported slope＇ s stress field, displacement field, axial force of bolts （ and cables） , and factor of safety are computed. From the result of computation, the C parameter＇ s sensitivity is correctly evaluated, the slope ＇ s stress field, displacement, axial force of bolts （ or cables） and the slope＇ s factor of safety are gained.