半刚性基层具有强度和刚度较高,易于就地取材,施工工艺简单,使用周期长,工程投资较低,养护维修方法简便等优点。因此,在国内外公路建设中被广泛应用。但是这种结构容易开裂,虽然国内外针对这一问题运用多种方法进行了大量的研究,探讨收缩裂缝产生和发展的机理,提出了多种防治对 The semi-rigid base has the advantages of high strength and rigidity, easy material drawing, simple construction process, long service life, low investment in engineering and simple maintenance and repair methods. Therefore, it is widely used in highway construction at home and abroad. However, this kind of structure is easy to crack. Although a great deal of research has been done on this issue at home and abroad by using various methods, the mechanism of shrinkage cracks generation and development has been discussed and various control measures have been put forward