In recent years, with the development of China's transportation industry, the number of highway projects has increased greatly, and most of them are expressways. In the expressway project, the bridge is an integral part. Some of the bridges in the pile foundation construction, will encounter caves, thereby increasing the difficulty of the construction of pile foundation. In order to ensure the construction quality of bridge pile foundation, the karst cave must be treated effectively. Based on this point, the article relies on the bridge project example of the first contract section of Heyu Expressway to discuss the construction techniques of cave-pile foundation. It is expected that this study can provide reference for similar projects.%近年来,随着我国交通运输业的发展,使得公路工程项目大幅度增多,其中又以高速公路居多.在高速公路工程项目中,桥梁是不可或缺的组成部分之一,有些桥梁在进行桩基施工时,会遇到溶洞,由此增大了桩基的施工难度.为确保桥梁桩基的施工质量,必须对溶洞进行有效的处理.基于此点,文章以和榆高速公路中第一合同段的桥梁工程实例为依托,对溶洞桩基的施工技术要点进行论述.期望通过本文的研究能够为同类工程提供借鉴参考.
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