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1964年津保北线保定地区曾用道路渣油(即多蜡重油,以后简称渣油)修筑了试验路面,目的是: 1.研究石灰加固土上铺筑渣油表面处治的施工技术。如渣油本身能否渗透,上下层结合是否良好,以及要不要洒透层油等问题。 2.提高改善渣油的稠度,增加处治层的稳定性和粘结性。 3.摸索操作方法,施工工艺。 4.通过试验提出处治层材料的技术指标。一、改建旧路面 1.石灰土底层:恢复水毁路段的路面,处理常年翻浆路段加宽原路面以及加厚碎砖路面均采用8％含灰量的石灰土。厚度一般为10～20厘米不等,土壤塑性指数一般要求≥8。如分层铺筑时,底层土的塑性指数低到4～6者,则含灰量应增至10％。 2.泥结碎石平整层:厚度有2、3、4、6厘米不等,用体积比为土:石=1:4～1:3.5相当于重量
In 1964, the northern part of Tianjin Jinbao Baoding area was used to construct test pavement with road residue (ie, multi-wax heavy oil, hereinafter referred to as residual oil) for the purpose of: 1. Studying the construction technology of surface treatment of paving residual oil on lime-stabilized soil. Such as the residue itself can penetrate the upper and lower combination is good, and whether to spill oil and other issues. 2. Improve the consistency of residual oil and increase the stability and cohesion of the treatment layer. 3. Groping operation method, construction technology. 4 through the experiment proposed layer material technical indicators. First, the transformation of the old pavement 1. Lime soil bottom: the restoration of water-damaged sections of the road to deal with the perennial spill section to widen the original road and thick broken brick pavement are used lime content of 8% limestone. Thickness is generally 10 to 20 cm, soil plasticity index generally ≥ 8. Such as stratified pavement, the bottom soil plastic index as low as 4 to 6, then the ash content should be increased to 10%. 2. Masonry gravel leveling layer: the thickness of 2,3,4,6 cm range, with the volume ratio of soil: stone = 1: 4 ~ 1: 3.5 equivalent to the weight