路基压实施工方案.doc

路基压实
路基压实是保证路基质量的重要环节，路堤、路堑和路堤基底均应进行压实。
   一、土质路基的压实
    填土路堤压实施工工序流程如下图所示。

   1．铺筑试验路段确定路基压实的最佳方案
    影响路基压实的主要因素有土的力学性质和压实功能、土的含水量、铺层厚度、土的级配以及底层的强度和压实度。路基碾压时，并不是这些因素独立起作用，而是这些因素共同起作用。因此高速公路进行路基施工时，应用不同的施工方案做试验路段，从中选出路基压实的最佳方案。
     铺筑试验段需制订试验方案，其目的是在给定压路机的情况下，找出达到压实标准的最经济的铺层厚度和碾压次数。确切地说，就是寻求铺层厚度与碾压次数之比的极大值。试验路段位置应选择在地质条件、断面形式均具有代表性的地段，路段长度不宜小于100cm。具体实施可以按以下步骤进行。
（1）取代表性土样做重型击实试验，确定土的最佳含水量ω和最大干密度ρdmax，并绘制干密度与含水量的关系曲线。
（2）根据土的干密度与含水量关系曲线控制土的含水量ω。
（3）确定铺层厚度和碾压遍数。一般可根据压路机械的功能及土质情况确定铺层厚度，高速公路一般应按松铺厚度30cm进行试验，以确
Subgrade Compaction
Compaction is an important part of ensuring the quality of roadbed, embankments, cuttings and embankments should be compacted base.
   First, the compaction of soil subgrade
    Construction of embankment compaction process flow is shown below.

   1. Pavement test sections to determine the best solution Compaction
    The main factors influencing the subgrade compaction have compacted soil mechanical properties and functions, soil water content, layer thickness, soil gradation, and the underlying strength and compactness. Compacted subgrade, it does not separate these factors play a role, but these factors play a role. Therefore highway embankment construction for the application of different sections of the construction program to do testing, to choose the best solution Compaction.
     Pavement test section of the need to develop pilot programs aimed at roller in a given situation, find out achieved the most economical compaction standard overlay thickness and the number rolled. Rather, is to seek the number of overlay thickness and the ratio of rolling a great value. Test section location should be chosen in the geological conditions, the cross section have a representative form of lots, road length should not be less than 100cm. Specific implementation can perform the following steps.
(1) to take representative soil samples for heavy compaction test done to determine the optimum soil water content and maximum dry density ω ρdmax, and the mapping of the relationship between dry density and water content curve.
(2) According to the soil dry density and water content of soil water content curve control ω.
(3) determine the thickness of overlay and rolled several times. Generally be armed under the roller to determine the function and spread a layer of soil conditions, the general should be loose paved highways to test the thickness of 30cm, to ensure
 

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