重交通条件下高速公路加宽工程路基差异沉降控制技术研究

发布时间：2018-04-11 05:44

本文选题：重交通 + 差异沉降　；参考：《长安大学》2014年硕士论文

【摘要】：近些年来，，现在汽车工业高速发展，带来了交通量加大、通行拥挤、道路服务水平不达标等问题，现状已无法满足经济发展和日常通行量的需求，迫切需要对原有高速公路进行改扩建。本文结合京港澳高速公路漯河至驻马店段改扩建工程实际情况，节选典型路段，以新旧路基的差异沉降控制技术为主线，主要通过国内外资料查阅与工程调研相结合、理论分析与数值模拟相结合、室内土工离心试验与工程应用相结合等技术手段，对重交通条件下新旧路基差异沉降控制技术进行研究。主要内容归纳如下：（1）通过对河南代表性高速公路路段交通车辆调查，对轴型、轴载谱进行分析，从而得出目前河南道路车辆“大交通量”和“大规模车辆超重”的交通特征；同时研究交通荷载在路基加宽工程施工和运营中的影响因素。（2）基于高速公路路基加宽工程新旧路基相互作用的特殊性，利用有限元模拟技术对不同地基处治方式下整个路基的剪应力和位移进行分析；对新老路基竖向位移、水平位移及差异沉降特征进行了详细的分析，得出符合差异沉降控制标准的优化设计。（3）结合试验段不同的设计方案，采用土工离心试验技术对不同地基处治方式下新旧路基的差异沉降进行量测和对比分析，同时研究新老路基的沉降规律及路基湿化状态下的破坏方式，并结合依托工程的差异沉降控制要求和经济性分析提出合理的地基处理方案。
[Abstract]:In recent years, with rapid development of automobile industry, brought traffic to increase the amount of traffic congestion, road service level standards, current situation has been unable to meet the economic development and the daily traffic demand, the urgent need for the original highway expansion. This combination of Hong Kong and Macao Expressway Luohe to Zhumadian section of the actual situation of reconstruction and extension project. Typical sections to the differential settlement control technology as the main line, mainly through the domestic and foreign literature combined with engineering research, theoretical analysis combined with numerical simulation, indoor geotechnical test and engineering application of combined technology, control technology to study the difference between subgrade settlement under heavy traffic conditions. The main content summarized as follows:
(1) the Henan representative of highway traffic survey for shaft, axle load spectrum analysis, thus obtains the traffic characteristics of current Henan road vehicles "big traffic" and "massive vehicle overweight"; at the same time, the influence factors on the traffic load in roadbed widening project construction and operation.
(2) the particularity of highway roadbed widening subgrade interaction based on shear stress and displacement analysis of different foundation treatment under the roadbed using finite element simulation technology; new and old roadbed on vertical displacement, horizontal displacement and differential settlement characteristics were analyzed in detail, obtained optimal design of control standard the differential settlement.
(3) based on the design of different test section, measurement and comparative analysis of differential settlement by geotechnical centrifuge test technology on different subgrade foundation treatment under the law, and at the same time on the subgrade settlement of the new and old roadbed wet damage mode, combined with the difference of relying on the project requirements and economic analysis the foundation treatment plan reasonable settlement control.

【学位授予单位】：长安大学
【学位级别】：硕士
【学位授予年份】：2014
【分类号】：U416.1

【参考文献】