连云港港30万吨级航道一期工程徐圩吹填2区围堤合龙施工

总结外海、深水、5 km2库区、深厚软土地基上围堤工程合龙的施工经验。本次施工充分利用抛石堤的透水性和大型施工船水抛,采用平堵与立堵相结合的工艺,适当提高龙口底高程,缩窄合龙口纵宽,降低合龙石料块度要求,减少了合龙风险和成本。

Border dike closure construction of the second dredger fill area in phase I project of Lianyungang port 300 000 DWT Xuwei harbor area

This paper summarizes the closure construction experience of border dike which is on deep soft soil foundation, and in open sea, deep water, 5 square kilometers reservoir area. The construction makes full use of the permeability of riprap dike and water thrown by large engineering ship, and using horizontal and vertical closure combined technology, heightening the bottom elevation and narrowing vertical width of closure gap. The construction technology not only reduces requirements of the rock size, but also reduces the risk and cost of closure construction.