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在公路及地下工程施工中,遇到软岩地层时,往往要进行地层预加固。在较小断面洞室开挖(一般跨度在6m以下的洞室)和局部小范围塌方的处理中,超前小导管以其施工工艺简单、施工作业空间要求较小、施工方案可以随时调整和显著的经济效益等特点在地层预加固时成为首选的方案之一。采用注浆法加固高速公路高填方路堤,进行路面局部塌陷的处理,无论是时间上还是经济上效果都很好,但是需要注意的是,注浆法进行路基处理施工必须在施工过程中有一个明确的注浆结束标准,并有专人观测记录注浆处理的参数,进行分析,并反馈到施工中来,从而可以节省工期及工程量。现通过阐述高速公路的加固技术方案,旨在提供合理的解决办法,为今后的实践提供科学理论参考。
In highway and underground construction, when encountering soft rock formation, strata are often pre-reinforced. In the excavation of small cross-section caverns (usually less than 6m in the cavern) and local small-scale landslide processing, the small lead pipe is easy to construct and requires less construction work space. The construction scheme can be adjusted and significantly adjusted at any time Economic benefits and other characteristics of the strata pre-reinforcement has become one of the preferred program. The use of grouting method to reinforce highway embankment high embankment for partial collapse of the road surface treatment, both time and economic results are good, but it should be noted that the grouting method for subgrade construction must be in the process of construction A clear end of grouting standards, and a special observation of grouting grouting parameters, analysis, and feedback to the construction, which can save time and quantity. By elaborating the highway reinforcement technology program, designed to provide a reasonable solution for future practice to provide a scientific reference.