垃圾杂填土室内加固处理研究

Study on Indoor Reinforcement Treatment of Waste Mixed Soil

摘要: 由于垃圾杂填土具有土质松软、孔隙比较大、含水率突变性较强的特点，在杂填土区域修建公路路基等构筑物会引起强度、承载力不足等问题。本文利用石灰、水泥和土壤固化剂3种加固材料对垃圾杂填土进行室内加固处理研究，通过对比不同加固材料、掺配比例、养生龄期加固后杂填土试件的无侧限抗压强度和抗压回弹模量评价加固效果。试验结果表明：3种加固材料都能有效的提高杂填土的强度和抵抗变形的能力；石灰和固化剂在10%剂量的条件下加固效果最佳，水泥则随剂量的增大而增大；养生龄期越长，加固效果越好；3种固化材料的加固效果水泥 > 土壤固化剂 > 石灰。

Abstract: With the characteristics of soft soil, large pores and strong abrupt water content of the landfill, the construction of highway subgrade and other structures in the mixed fill area will cause problems such as insufficient strength and bearing capacity. In this paper, three kinds of reinforcement materials of lime, cement and soil curing agent are used to carry out indoor reinforcement treatment of waste mixed soil. The reinforcement effect was evaluated by the value of the unconfined compressive strength and the compressive rebound modulus of the miscellaneous fill, with different kinds of materials, different ratio and different curing period respectively.  The test results show that the three kinds of reinforcing materials can effectively improve the strength and resistance of the mixed filling; the lime and curing agent have the best reinforcement effect under the condition of 10% dose, and the cement increases with the increase of the dose. The longer the health age, the better the reinforcement effect; the reinforcement effect of the three solidified materials is cement > soil curing agent > lime.