海堤不同地基加固衔接位置的处理方法  

Treatment method of connection position between different foundation reinforcement of sea embankment

作　　者：许增会 高晓兵 XU Zeng-hui;GAO Xiao-bing(CCCC Third Harbor Consultants Co.,Ltd.,Shanghai 200032,China)

机构地区：[1]中交第三航务工程勘察设计院有限公司,上海200032

出　　处：《水运工程》2021年第5期22-25,90,共5页Port & Waterway Engineering

摘　　要：针对爆破挤淤与塑料排水板衔接堤段条件复杂的特点,对其衔接位置选址及处理方法进行研究。通过分析堤基范围内地质条件特征,结合海堤建设时序、整体稳定性、差异沉降及工程投资等因素,选择软土层薄、砂层厚及轴线拐角的堤段作为衔接位置。基于爆破振动影响,减少衔接位置的爆破挤淤进尺,预留排水板安全距离,先进行爆破挤淤再施工排水板。采用简化肖普法对衔接段海堤进行稳定复核,增加反压平台,与相邻海堤平顺过渡,并经现场验证。结果表明,选择合理的衔接位置可有效减少工程投资,确保海堤安全可靠、平面平顺衔接。Aiming at the complex conditions of the connection embankment between blasting compaction and plastic drainage plate,we study the site selection and treatment method of the connection position.Based on the analysis of the geological conditions within the scope of the embankment foundation,we combine with the factors such as the construction sequence,overall stability,differential settlement,and project investment of the sea embankment,select the embankment section with thin soft soil layer,thick sand layer and axis corner as the connecting position.Based on the influence of blasting vibration,we reduce the blasting compaction advance progress in connection position,reserve the safety distance of drainage plate,implement the blasting compaction first,then implement the drainage plate,use the simplified Bishop method to check the stability of the embankment in the connecting section,add counter pressure platform to make a smooth transition with the adjacent embankment,and verify the effect on the site.The results show that selecting the reasonable connection position can effectively reduce the project investment,and ensure the safety and reliability of the sea embankment as well as the smooth connection of the plane.

关 键 词：爆破挤淤 塑料排水板 衔接位置 安全距离 施工顺序 

分 类 号：U656.2[交通运输工程—港口、海岸及近海工程]