关于公路工程沥青路面施工技术和质量控制研究

随着我国经济的不断发展,公路运输已经在其中承担着越来越重要的作用,因此我国公路工程建设处于一个相当重要的位置,沥青路面是目前我国公路工程中使用较为广泛的路面,其自身具有流程简单、取材方便的特点,能够保证驾驶员在这一路面上的安全驾驶,因此在公路工程中关于沥青路面的施工技术与质量控制也处于越来越重要的地位,公路工程施工方应该重视这一方面的问题,保证公路质量过关确保驾驶员的生命安全得到保障。

沥青混合料的体积组成及其数字图像处理技术

针对目前沥青混合料设计与生产领域的技术现状 ,在分析Superpave沥青混合料体积设计特点及存在问题的基础上 ,提出采用数字图像处理技术研究沥青混合料的体积组成特性 .文中重点介绍了采用CCD技术获取沥青混合料体积组成二维图像并进行数字图像处理的研究结果与应用实例 ,指出了数字图像处理技术对于促进沥青混合料设计与生产技术进步的可行性与重要性 。

Research on the different content of weathered sand influence on expansive characteristic of a highway expansive soil in Yichang

This paper aims at widespread presence of expansive soil which can be obtained in the project from Xiaoxita to Yaqueling first-class highway rebuilding engineering in Yichang City of Hubei Province and weathered sand which can be made full use locally,many experiments have been made. Compaction experiments and expansibility index indoor experiments of undisturbed expansive soil and expansive soil mixed with sand ranging from 10 % to 50 % have been made. Through the test mixing undisturbed expansive soil with different content of weathered sand,it can change the expansive soil water characteristics and compaction characteristics. It can influence the expansibility of the expansive soil index and significantly inhibit the expansibility of the expansive soil and reach the standard of roadbed filler.

Preliminary study on the highway-related human activities

In this paper, highway-related human activities are defined as well as the human activities related to highway for keeping a normal production and livelihood. They include highway research, highway education, highway legislation, administration of justice of highway case and enforce the law, assessment, planning, design, construction and management, decision-making of highway projects. Therefore, highway-related human activities are not equal to construction of highway projects.

Concrete Placement for Bridge Decks on an Expressway Extension Project

The paper presents examples of technological designs for concrete placement in road bridges constructed during the S5/S 10 expressway extension in Poland. The project included eight concrete or composite bridge structures with different numbers of decks. The concrete placement technology is presented for the following bridge decks： slabs cast-in-situ, composite with precast or VFT （prefabricated composite beam） beams and mixed with cast in situ slabs and VFT-WIB （filler beam） beams. Continuous concrete placement was adopted for almost all the bridge superstructures except the mixed-type decks where construction joints were necessary. To control shrinkage, formwork deformations and existing restraints, the concrete was poured in layers and in stages. The design pace of concrete placement was moderate to be regulated at site without compromising safety and quality. The placement methods enabled both efficient and safe concrete pours.

Research on the evaluation and mechanism of socio-economic benefit of highway projects

Based on the theory of system dynamics, the paper analyzes the mechanism of socio-economic benefits of highway projects and establishes the system dynamics model of regional economic-highway development. Then taking Jinji（Tianjin--Jixian） Highway of Tianjin as an example, the errors of system simulation are tested, and the system dynamics model built is verified to be quite stable, which has a high performance. Through the comparison of simulation results with and without Jinji Highway, the paper simulates and predicts the socio-economie benefit of each year from 2003 to 2013. Thus the quantification evaluation of socio-economic benefit of highway project is realized and will provide the theory instructions for similar projects in the future.

公路边坡水毁风险评价方法研究

为了避免或减轻公路水毁带来的损失,通过对公路边坡水毁风险进行等级划分,选取相应的评价指标,构建了公路边坡水毁风险等级评价指标体系。采用灰色定权聚类分析法,结合具体工程实例对安康地区公路边坡进行了风险等级评估分析,并通过模糊综合评价对这些工程实例进行了对比评价分析,验证了灰色定权聚类分析法在工程中的应用,为边坡水毁预防性养护提供理论依据。