3 . based on the analysis of the mechanic characteristics of the earth , a concept , the magnifying effect of the subbase , was proposed to eliminate the disunity in calculations . many facts in concrete pavements can be explained by using this concept 3 、在分析土体力学性质的基础上，提出土基放大效应的概念，解决刚性路面板计算理论不统一的问题，并解释一些刚性板的工作情况。
3 . in order to obtain the modulus of each layers and the subgrade . a back - calculating method which is based on the system identification principle was presented and supply the reliable technology for the overlay design 为了获取路面各层及土基的模量，本文基于落锤式弯沉仪( fwd )的检测数据对路面结构层模量的反算方法进行了详细分析，从而为路面加铺层厚度设计提供了可靠的技术支持。
Hi this paper , a set of typical pavement structures is given and some problems have been solved . the first step is present the computation and dividing methods of roadbase back module and cumulatetion of axle load , which are two major reasons of affecting pavement structure design 本文首先从土基回弹模量e _ o 、累积标准轴次n _ e出发，探讨了这两个影响路面结构厚度的主要设计参数的计算及等级合理划分的方法。
Based on the research of several shiplocks , the temperature and stress field of the lock floor is simulated under temperature and gravity loads , where the shiplock floor is built on different foundations , the effect of setting up wide construction joints is analyzed by the nonlinear finite element method 作者通过对多个船闸工程的研究，结合非线性有限元仿真分析方法，考虑重力、温度等荷载，计算分析土基和岩基上船闸结构底板预留宽缝施工方法的效果。
According to the pavement structure dynamical analyze theory , the principle and process of the pavement modulus back - calculation have been discussed . the appliance ideas of the dynamical modulus among the pavement evaluation , the dynamical characteristic and correlative dynamical parameters of the cement concrete pavement surface , basement and subsoil have been investigated , and the contrast relationships between dynamical and static modulus of the cement concrete pavement have been established , and the evaluation standard of the structure layers " dynamical modulus of the cement concrete pavement has also been presented 根据路面结构动力分析理论，对路面模量反算的原理及实现过程进行论述，研讨了动态模量在路面评价中的应用思想及水泥混凝土路面面层、基层、土基的动态特性和相关的动力参数，建立了水泥混凝土路面动态模量与静态模量的对比关系，提出了水泥混凝土路面各结构层动态模量的评价标准。
Preparation for construction : the surface of the under layer should be even and firm , and in accordance with the design requirement , without loose material and flaccid site , and need to reroll 2 3 times within full - width range of the subgrade with vibrating roller before the construction , as well as test the compaction and defecting , to check whether there is unqualified point in the soil base 施工准备：施工前下承层表面要平整、坚实，符合设计要求，无松散材料和软弱地点，施工前要用振动压路机在路基全宽范围内复压2 3遍，同时进行压实度及弯沉检验，检查土基中是否有不合格点。
In this paper , a series of surveys on road condition , pavement - performance and destroy reason are analyzed , soil property , hydrologic regime are combined , modulus of resilience are confirmed on heavy compaction test , foundation classification in area of qinhuangdao is divided into 3 grades and highway is divided into 3 districts according to the principle that different soil grades produce the same effect on thickness of base course or bottom course , classification of traffic is divided into 4 grades after observation materials of traffic volumes are collected extensively , traffic characters and parameters are analyzed 本课题在对现有路面结构状况和使用状况进行调查，并对路面使用性能和破坏原因进行分析的基础上，结合秦皇岛地区的土质、水文条件，确定重型击实标准条件下土基回弹模量值，依据不同等级土基对路面基层或底基层的厚度产生大致相同效应的原则，将秦皇岛地区地基强度等级划分为三级并将本地区公路分成三个区。在广泛收集交通量及组成的观测资料，了解交通特性，进行交通参数分析后将交通量等级划分为四级。
On the basis of the loess distribution , engineering geology and specific properties of road use in gansu province , this paper divides traffic volume grade according to the conditions of transportation of all high - grade highways which are being built and have already finished . besides , it analyses the relativity of three different test methods , establishes the related relations , and divides their strength grade after measuring rebound module of subgrade of the representative high - grade highways in gansu loess area . furthermore , it recommends the common semi - rigid and asphalt concrete design parameters by comparing the experiment in doors to outdoors , and draws up the optimized design program aga - lq based on advanced genetic algorithm and solves the non - liner optimization design model of asphalt pavement construction by computer 本文基于甘肃黄土分布、工程地质及路用特性研究，对该黄土地区在建和已建的全部高等级公路交通状况进行了详细调查和分析，划分了交通量等级；对甘肃黄土地区代表性的高等级公路，利用三种不同方法实测了土基回弹模量，分析了各测试方法的相关性，建立了相关关系，对土基回弹模量进行了强度等级划分；通过室内外试验比较，推荐了常用的半刚性材料和沥青混凝土设计参数值；利用计算机编制了基于改进遗传算法的优化设计程序aga ? lq ，并成功求解了沥青路面结构非线性优化设计模型；最后经计算提出了甘肃黄土地区高等级公路沥青路面典型结构，并编制了查询图库软件cx ? lq ，供设计单位直接选用，科学简便地解决了甘肃黄土地区的路面设计问题。
The sensitivity analysis of design parameter of subgrade and pavement are used to confirmed the degree of impact on working state with change of the design parameter , it is the rational and economy that the range of design parameter are proposed . structure combination design is used to proposed basic structure of qinhuangdao ' s asphalt pavement in view of local natural environment , build material , traffic classification and soil grades . this paper puts forwards suiting 39 kinds of typical structure of qinhuangdao ' s asphalt pavement according to the actual structure , experimental section long - term observation , extensive surveys , structure theory ' s analysis and calculation 在公路等级、交通量等级、土基等级及路面材料参数研究的基础上进行路基路面设计参数敏感性分析，用以确定设计参数的变化对路基路面工作状态的影响程度，并据此给出了经济合理的路基路面设计参数范围；结合本地自然环境、筑路材料、交通状况及土质情况进行路面结构组合设计，提出了适宜于秦皇岛地区公路沥青路面的基本结构；最后根据实际路面结构、试验路的长期观测、大量调查与路面结构理论分析计算相结合，提出并推荐适合秦皇岛地区的39种沥青路面典型结构，这是本课题的主要宗旨，其研究成果将直接指导设计人员的工作，并避免随意性和盲目性，对加快秦皇岛地区公路交通事业的发展将具有十分重要的意义，对其他地区也有一定的指导意义。
