2017年6月上第46卷第11期
DI:10.7672/sgjs2017110035
施工技术
CONSTRUCTION TECHNOLOGY
适于黄土高填方路堤综合压实技术的应用研究
巨玉文1，薛凯元1王文正
（1.太原理工大学建筑与土木工程学院，山西太原030024；2.北京市政建设集团有限责任公司
第三工程处，北京100176）
[摘要】以太原市太行路间家峰路段为工程应用对象，提出并应用一种适于黄土填料高填方路堤的分层碾压与重锤补夯相结合的综合压实技术。通过结合施工进程的土性试验、现场深层沉降监测等试验手段，研究高填方路堤黄土填料的压实特性、重锤补的强化机制及路基的综合压实效果。相关土性试验研究结果表明：分层碾压后的土体再经重锤补夯作用后，压实度、压缩模量等参数得到大幅提高，并随填方深度均呈周期性的锯齿形曲线变化形态。沉降监测及分析结果表明：该综合压实技术处理后的路堤工后沉降显著减小，趋于稳定的最大工后路面沉降仅为路堤高度的0.1%，且填方体的自身压缩变形为总沉降的主要组成部分；填方体工后沉降与时间呈对数关系，依此提出填方体工后沉降的预测公式，与实测值吻合较好。
【关键词］公路工程；黄土高填方路堤；土性试验；重锤补夯；沉降；压实度
［中图分类号】U416.1
【文献标识码］A
［文章编号］1002-8498（2017)11-0035-08
Study on Application of Comprehensive Compaction Technology to
Loess-filledHighwayEmbankment JUYuwen',XUEKaiyuan',WANG Wenzheng”
(1. College of Architecture and Ciril Engineering, Taiyuan Unirersity of Technology, Taiyuan, Shanxi 030024, China :
2. Third Engineering Department, Bejing Municipal Construction Co. ,Lid. , Bejing 100176, China)
Abstract: An integral compaction technique, starting from layered compaction, followed by heavy tamping, which is suitable for effective compaction of loess-filled high embankment was proposed and applied to the Yanjiafeng section of Taihang highway engineering project. During construction, the loess soil characteristic of the fill material during compaction, the heavy tamping mechanism and final effectiveness of compaction were studied with data obtained by in-situ testing of soil samples and deep e compaction and compressive modulus are both increased dramatically, and these parameters vary periodically along with the depth of filling material, representing a sawtooth form. It is well demonstrated aasooe eaaoaaassaeaee the compression deformation of the embankment being the main component of the total settlement. A logarithmic relationship is found between time and post-construction settlement of the filling body, and the prediction formula is presented. The formula has a good agreement with the measured values.
eoses settlement;compactness
0
引言
*国家自然科学基金项目（51178287）；北京市政建设集团有限责任公可研发0目（201408
[作者简介］巨玉文，副教授，颈士生导师，E-mail：juyuwen@tyut edu. cr
【收稿日期]方数据
35
随着我国中西部地区高等级道路的高速发展黄土地区道路中已经出现大量的高填方路堤，其共同特点是修路地点偏远、材料不可选择，填料往往只能采用当地的黄土。同时，由于车辆承载能力的增加和高速行驶的需求，道路工程中对高填方路堤的施工技术提出越来越高的要求，以满足路堤的整