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河北省衡水地区于1964年修筑了约60公里的渣油表面处治,底层都是新作的石灰土。通过一年的施工实践,初步掌握了石灰土和渣油表面处治的一些特性,取得了一些经验,也接受了许多教训。现在把我们的一点体会概述如下: (一)石灰土底层所用土的塑性指数,按规定不小于8,但衡水地区粘土不是到处都有,不一定都能达到8,有一段粉土塑指只6.1。怎么办?有两种办法,一是远运粘土,使塑性指数达到8;一是就地取土,严格操作管理,设法保住工程质量。我们采用了后一种办法。但由于缺乏经验,一段石灰土断续发现松散破坏。我们认真总结了这次失败的教训:灰土松散主要是碾压时含水量不足所致。如有的段碾压时含水量
Hengshui in Hebei Province in 1964 built a 60 km residual oil surface treatment, the bottom is the new lime soil. Through a year of construction practice, preliminary mastered some characteristics of the surface treatment of lime soil and residual oil, gained some experience, also accepted a lot of lessons. Now let us a little experience is summarized as follows: (A) the plastic index of soil used in the lime soil, according to the provisions of not less than 8, but not everywhere in Hengshui clay, not necessarily can reach 8, 6.1. There are two ways, one is the long-distance clay, the plasticity index reached 8; one is to take soil on the spot, strict operational management, trying to keep the quality of the project. We use the latter method. However, due to lack of experience, a piece of limestone intermittently found loose destruction. We have carefully summed up the lesson of this failure: Loose soil is mainly due to lack of water content when rolling. If some of the water content when rolling