The test reveals the excavationeffect, time effect, three-dimensional effect and rainfall lagging effect of the prestressed anchor rope composite soil nailing.
试验结果表明预应力锚索复合土钉支护结构具有开挖效应、时间效应、空间效应、降雨滞后效应；
2
The low density drilling fluid has borehole excavationeffect on compensated neutron porosity logging, and by this way apparent porosity is lower than the true value.
Based on the above work a space-time effect on the excavation face of tunnel with the function of bolting support is considered, thus the engineering application of BEM is developed.