公路混凝土防撞護欄是一種矮墻式結構，主要防護原理是利用失控車輛碰撞其后爬高并轉向來吸收碰撞能量。該種護欄防止車輛越出路外的效果好，并具有維修費用少的優點。利用滑模技術進行公路混凝土防撞護欄施工，是國外普遍采用的一種施工方法，并且國外大多采用履帶式混凝土滑模機進行鋪筑，而在國內還極少應用?；炷磷o欄具有一定的垂直高度( 一般80cm 左右) ，要實現混凝土的快速成型及連續快速施工，對混凝土的配制和施工工藝都有很高的要求
Highway concrete crash barrier is a kind of short wall structure. The main protection principle is to use the runaway vehicle to climb and turn to absorb the collision energy. The guardrail has good effect to prevent vehicles from going out of the road, and has the advantages of less maintenance cost. The construction of highway concrete anti-collision guardrail by slip form technology is a common construction method abroad, and most of them are paved by crawler concrete sliding mode machine, but it is rarely used in China. The concrete guardrail has a certain vertical height (generally about 80cm). In order to realize the rapid formation and continuous rapid construction of concrete, it has high requirements for the concrete preparation and construction technology