MECHANICAL STABILISATION, CHEAP EFFECTIVE WAY OF IMPROVING THE MARGINAL MATERIALS FOR ROAD CONSTRUCTION

This paper presents a cost-effective method of improving the quality of marginal geo-materials through mechanical stabilisation. Two case study of the mechanical stabilisation as used during the construction of two projects in Tanzania, namely Mwika – Kilacha and Songea-Namtumbo, is presented. In both cases, substantial savings to the contract were realised. In this paper, the geotechnical and geo-mechanical properties of the geo-materials from these two cited projects before mechanical modification and after mechanical modification are presented and discussed. From the laboratory results as well as field test results, it can be concluded that mechanical stabilisation is the simplest method of stabilisation yet cost-effective means of improving the geotechnical and geo-mechanical properties of the marginal geo-materials.

本文提出了一种通过机械稳定化处理（mechanical stabilisation）改善边际岩土材料（marginal geo-materials）性能的经济高效方法。本文还介绍了坦桑尼亚两项工程——姆维卡-基拉查（Mwika – Kilacha）与松盖阿-南通博（Songea-Namtumbo）——施工中采用的机械稳定化处理案例研究。两项工程均实现了合同成本的大幅节约。本文针对上述两项工程中的岩土材料，对其经机械改性前后的岩土工程与地质力学性能进行了阐述与讨论。综合实验室试验与现场测试结果，可以得出结论：机械稳定化处理是改善边际岩土材料岩土工程与地质力学性能的最简稳定方法，同时也是兼具经济性的高效手段。