胶凝砂砾石施工技术在围堰工程中的实践与应用

胶凝砂砾石施工技术是将胶凝砂砾石作为围堰工程中的防冲防渗结合体结构，以替代传统防渗墙+块石护面的结构形式。针对岷江龙溪口航电枢纽工程二期一汛右岸船闸全年围堰工程的应用实践，介绍了原材料及配合比的选用、施工工艺及方法、质量控制等，重点阐述了应用过程中胶凝砂砾石与混凝土、高喷防渗墙等既有结构连接处以及施工缝面等关键部位施工工艺，并进行施工技术经济性比较。结果表明，胶凝砂砾石施工技术具有施工工艺简单、工序少、成本低、施工速度快的优势。

Application and practice of cementitious sand gravel construction technology in cofferdam engineering

The construction technology of cementitious sand gravel is to use cementitious sand gravel as the combined structure of anti-impact and anti-seepage in cofferdam engineering to replace the structural type of traditional anti-seepage wall + block stone cladding.Aiming at the application practice of the year-round cofferdam project of the right bank lock of the second phase of the Longxikou Navigation-power Junction project in Minjiang River,the selection of raw materials and matching ratio,construction technology and method,quality control,etc.,are introduced,and the construction technology of the existing structural connections such as cemented sand gravel and concrete,high-spray impermeable wall and construction seams in the application process are mainly expounded,and the construction technology and economy are compared.The results show that the construction technology of cementitious sand gravel has the advantages of simple construction process,less process,low cost and fast construction speed.