气泡混合轻质土路堤最佳浇筑厚度的确定方法  

A method for determining optimum casting thickness of foamed mixture lightweight soil embankment

作　　者：朱俊杰[1,2] 刘鑫[1,3] 洪宝宁[1,2] 刘顺青[4] 徐奋强[1,5] 化君晖 

机构地区：[1]河海大学岩土力学与堤坝工程教育部重点实验室,江苏南京210098 [2]河海大学江苏省岩土工程技术工程研究中心,江苏南京210098 [3]河海大学隧道与城市轨道工程研究所,江苏南京210098 [4]江苏科技大学土木工程与建筑学院,江苏镇江212003 [5]南京工程学院建筑工程学院,江苏南京211167

出　　处：《岩土力学》2016年第12期3642-3649,共8页Rock and Soil Mechanics

基　　金：江苏省自然科学基金青年基金(No.BK20140848);中央高校基本科研业务费专项资金资助(No.2014B04914);中国博士后科学基金面上资助(No.2014M550882);广东省交通运输厅科技项目(No.科技2012-02-013)~~

摘　　要：气泡混合轻质土是一种新型的环保岩土材料,已开始作为路堤填料应用。然而至今每层的最佳填筑厚度问题仍未解决。基于研制的一种可用于测量施工期气泡混合轻质土强度沿路堤深度变化的仪器,在给出相应的测试原理和测试步骤,以及确定最佳浇筑厚度判定依据的基础上,通过工程实例的论证,提出了气泡混合轻质土作为路堤填料时最佳浇筑厚度的确定方法。针对现场试验段的工程情况,建议浇筑厚度控制在500 mm以内。该项研究不仅有利于气泡混合轻质土作为路堤填料的施工质量控制,而且为其更广泛地应用提供技术支撑。Foamed mixture lightweight soil（FMLS） is a new environmental protection geotechnical material. It has been applied to embankment filling. However, the issue of optimum casting thickness of each layer FMLS has not been solved yet until now. In this study, a self-developed instrument is used to measure the strength of the FMLS at different depths during construction. The testing principles and steps are given; and the judgment criterion of the optimum casting thickness is determined. Through an engineering case, a method is proposed for determining the optimum casting thickness for FMLS as embankment filling material. It is suggested that the optimum casting thickness should be controlled within 500 mm for test section. This procedure is beneficial to control construction quality of FMLS as embankment filling material.

关 键 词：气泡混合轻质土 强度测试仪 浇筑厚度 判定依据 

分 类 号：TU449[建筑科学—岩土工程]