爆炸挤淤填石堤坝的沉降分析和计算  

Analysis and calculation of settlement of groynes built by toe-shooting method

作　　者：李涛[1] 陈书丽[2] 江礼茂 

机构地区：[1]北京交通大学土木建筑工程学院,北京100044 [2]黄河勘测规划设计有限公司,河南郑州450003 [3]宁波科宁爆炸技术工程有限公司,浙江宁波315040

出　　处：《岩土工程学报》2009年第10期1584-1589,共6页Chinese Journal of Geotechnical Engineering

摘　　要：爆炸挤淤填石法广泛用于我国浅海滩涂防波堤的修建,但目前对如何计算这类爆炸排淤填石堤坝的沉降还没有人研究。首先将传统沉降计算方法用于一个工程实例,其计算结果与堤坝沉降实测值的对比表明传统方法不适于计算这种断面形状复杂且处于深厚淤泥中的填石坝的沉降。为解决此问题,假设爆炸后的淤泥为流体和堤坝沉降主要是淤泥渗入填石的孔隙所致,基于饱和多孔介质渗流理论提出了一种计算爆炸排淤填石堤坝沉降的新方法。该法计算的沉降与工程实例的沉降实测值接近,说明其能较好地反映该类堤坝的实际沉降,从而具有一定的实用价值。The toe-shooting method has been widely used to build nearshore groynes in China. How to analyze and calculate the settlement of such kind of groyne is, however, not investigated at present. The settlement of a real groyne with a complex cross-section built by the toe-shooting method in deep silt layer is first calculated by use of traditional methods. The results are compared with the measured settlements and show that these traditional methods are not suitable for calculating the settlement of the groyne. To solve this problem, it is assumed that the silt should become fluid after blasting and the reason for the settlement of the groyne be the penetration of silt in broken stone body. A new method to calculate the settlement of such groynes is then proposed based on the seepage flow theory of saturated porous media. It is shown that the settlements calculated by the new method are close to the measured values. Therefore, the proposed method is able to realistically predict settlements of groynes and useful in real groyne engineering.

关 键 词：爆炸排淤填石法 防波堤 地基沉降 饱和多孔介质 渗流 

分 类 号：TU411[建筑科学—岩土工程]