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为了分析土钉墙防护顺层石质高边坡的工作性状,了解土钉墙作用机理和受力状态,结合西南地区渝怀铁路采用双级土钉墙防护顺层石质高边坡的工程实际,进行了现场试验研究。在上下级墙面后不同排数土钉的不同位置上埋设了钢弦式钢筋计,进行了其工作应力状态的性能测试。得出如下结论:(1)土钉拉力沿土钉长度呈曲线形分布,并且在不同墙高处最大拉力存在双峰值和单峰值2种情况;(2)土钉拉力随时间延续有增大的趋势;(3)土钉墙潜在的破裂面位置在上下墙高部位与理论值较为接近,而中间部位靠近墙面;(4)实测土钉墙背土压力沿墙高呈中间大、两头小的分布规律等。这些结论可为类似工程的设计提供有益参考。
In order to analyze the working characteristics of the soil nailing wall along the stony high slope and to understand the mechanism and stress state of the soil nailing wall, combined with the double-level soil nailing wall protection Yuzhong railway southwest stratum high stony slope engineering In fact, conducted a field test study. After the upper and lower walls of different rows of different numbers of rows of soil nail buried in the different positions of the steel wire-type steel meter, the work of its stress state performance test. Draws the following conclusions: (1) The soil nailing tension curves along the length of the soil nail, and there are two kinds of maximum peak tension and different single peak value at different wall height. (2) The soil nailing tension increases with time (3) The potential rupture surface of soil nailing wall is close to the theoretical value in the high part of the upper and lower walls, while the middle part is close to the wall; (4) Small distribution rules. These conclusions can provide a useful reference for the design of similar projects.