软土路基固化土工艺的应用研究

市政道路的软土路基是指路基土壤具有较大的含水量和较差的承载力,这种路基土壤容易被压实,引起路基沉降和路面损坏等问题,是影响道路使用寿命和安全性的重要因素之一。为了解决这些问题,固化土工艺被广泛应用于市政道路软土路基处理中。基于此,本文研究了固化土工艺在市政道路软土路基处理中的应用,以提高软土路基的强度和稳定性,保障道路的使用寿命和安全性。

软土路基固化土工艺的应用研究

文章结合宁波地区西洪大桥及接线工程施工IV标段中保通道路软土路基固化土工艺技术的应用,针对宁波地区宕渣材料紧缺、工程弃土处置困难的现状,通过采用三种堆场固化施工工艺,最终形成的路基施工效果,对比确定了宁波地区软土路基最佳施工工艺为二次掺灰且干拌的施工工艺,且就该工艺的后续摊铺碾压施工工艺进行研究总结。

Rainwater quality assessment of a solidified soil cistern using new construction technology

A plastic mixture construction technology using MBER （material becoming earth into rock） soil stabilizer is introduced and the water quality of a solidified soil cistern using the technology is analyzed. Rainwater was harvested in July, 2012. Water quality of runoff and cistern water after storage was measured, including turbidity, chemical oxygen demand （COD）, total nitrogen, nitrate, and ammonia. Results show that pollutant concentrations in runoff decreased with time, indicating that runoff in the early time should be removed. Nitrate concentrations in cistern water increased after storage, while the remaining parameters decreased. Measured pollutant concentrations did not exceed the limit according to the standard for drinking water in China. It can be concluded that the solidified soil cistern with plastic mixture construction technology can provide available water for domestic use.

垃圾土力学特性及其路基填筑应用研究

将垃圾土应用于公路路基填筑是实现垃圾土大规模资源化利用的有效途径。本文首先对实际垃圾土进行筛分处理,制得适用于公路路基的垃圾筛余土(简称垃圾土);进而,通过室内试验研究了直接压实垃圾土和固化垃圾土的抗剪强度、CBR值等力学特性;以此为基础,修筑直接压实垃圾土路基试验段,并采用适宜的新型施工工艺修筑固化垃圾土路基试验段,监测路基的工后沉降随时间的变化规律,对比两种垃圾土路基的应用效果。结果表明:固化垃圾土与直接压实垃圾土相比,粘聚力提高1.6~1.9倍,内摩擦角提高30%以上,CBR值提高4.5~5.1倍;固化垃圾土路基的工后沉降比直接压实垃圾土路基降低64.7%,且能够更早地趋于稳定。以上结果证明:本文提出的固化垃圾土路基施工工艺和垃圾土资源化利用途径是可行的。