台风时期钢套箱的加固措施浅析

钢管桩嵌固深度和波流要素是决定钢套箱受力状况的两个主要因素。按较不利组合原则,确定台风时期钢套箱的验算荷载和边界条件,对加设“井”字撑和箱内充水两种加固措施进行了比较验算,结果表明:台风时期不宜增设“井”字撑加固措施;箱内充水是改善钢套箱受力状况的简单有效措施,充水深度应低于潮水位,可取钢套箱内外水头差的一半。

Superficial Analysis of Strengthening Measures in Steel Boxed Cofferdam in Typhoon

The embed depth and wave-stream elements of steel pipe piles are two main factors determining the bearing conditions of steel boxed cofferdam.According to the more disadvantageous principles,the checking loads and boundary conditions can be gained in typhoon.In this paper,the strengthening measures of adding "#" support and injecting water in the box are checked and calculated respectively.The results show that the "#"support strengthening measure is not suitable in typhoon,and that injecting water in box is the simple and benefit measure to better the bearing situation of steel boxed cofferdam,where the injecting water depth should below the tide water level,and usually take a half of water difference inside and outside steel boxed cofferdam.