两河口特大桥岩堆稳定分析及防护措施研究

对郑万铁路两河口特大桥岩堆工程地质特征及稳定性进行分析，根据分析结果提出治理措施，并根据岩堆实际稳定情况对参数进行反演，结合室内抗剪强度试验给出岩堆滑动面的抗剪强度用于稳定性计算。综合研究后确定采用双排锚固桩和坡面锚索的综合防护措施。监测结果表明:治理后岩堆体未发生变形，防护设计达到预期目的，确保了两河口特大桥桥墩的稳定性和岩堆下方村民的生命财产安全。

Stability Analysis of Rock Heap at Lianghekou Grand Bridge and the Protection Measures

IHerein the engineering geological characteristics and stability of the rock heap at Lianghekou Grand Bridge on Zhengzhou-Wanzhou Railway were analyzed and, on this basis, the control measures were proposed. According to the actual stability of the rock heap, the parameter inversion was carried out and, in combination with the indoor test, the shear strength of slide plane in rock heap was used for the purpose of stability calculation. As a result, it was determined with studies to use double row of anchored piles and tieback anchors on slope surface as the comprehensive protection measures. The monitoring result shows that no deformation occurs at the rock heap after treatment, thus the protection design reaches the goal desired, ensuring the stability of the piers of Lianghekou Grand Bridge and the safety of the downstream people’s lives and properties.