远破波大波高波浪作用下沉箱抗浪稳定性验算

岸壁码头施工中,沉箱受波高为13.62 m的远破波作用极其罕见,在如此大的波高下,沉箱受波峰压力和波谷压力作用,对沉箱的稳定性影响非常大。为提出合理的方案解决该问题,通过受力分析、计算、物模试验相结合的方法,对烟台西港区一期工程C6,C7,C8沉箱,进行了抗滑和抗倾覆稳定性计算,结果和物理模型试验结果相吻合。利用土力学原理,对远破波大波高作用下的已安装并回填的沉箱,可以通过沉箱背后土压力和孔隙充砂增重相结合的方案,利用土压力抵抗波浪力作用的方法,达到沉箱抗滑和抗倾覆稳定性的要求,确保工程的施工安全。

Caisson's anti-wave stability checking calculation under action of big wave height of distant breaking wave

It is extremely rare that the caisson was affected under 13.62 m wave height of distant breaking wave in the construction of bulkhead quay.Under such a big wave height,the caisson was affected by the wave top pressure and wave bottom pressure,and the influence on the caisson’s stability is great.For obtaining a reasonable solution to the problem,this paper carried out a stability calculation of anti-slide and anti-overturning through the combined method of stressed analysis,calculation and physical model test for the caissons C6,C7 and C8 in phase Ⅰ project of Yantai west port area.The result coincided with that of physical model test.Based on the principle of soil mechanics,we put forward the combined weighting scheme for the installed and backfill caisson through behind backfill and pore filling sand for the caisson under the action of big wave height of distant breaking wave.With the method of earth pressure against wave pressure’s effect,the stability requirements of caisson’s anti-slide and anti-overturning can be satisfied and thus the safety of construction ensured.