【作者】 王爱兰；

【导师】 吴能森；

【作者基本信息】 福建农林大学 ， 森林工程， 2011， 硕士

【摘要】 随着城市建设的快速发展,基坑降水是深基坑工程施工过程中的重要步骤,也是保证基坑安全施工的关键。基坑工程降水对基坑周围地表沉降的影响也己引起社会的广泛关注,但目前采用的预测方法的计算结果与工程实测数据相差较大。目前,在基坑降水条件下,工程上常用分层总和法计算基坑周围地表沉降量,计算的地表沉降值往往与工程实测数据相差较大,对工程降水对周围环境影响的预测无法准确,对工程降水的设计对工作的合理性无法评价。基于实测沉降资料的沉降预测方法对沉降的预测比传统的方法更具实用性。本文着重比较了常用基于实测沉降资料的沉降预测方法的三角形法、指数法和抛物线法,对本地区工程实例进行降水后的地面沉降预测计算,并把计算值工程实测数据进行比较分析。分析后发现,三角形法与工程监测数据比较接近,对于本地区高水位淤泥质土质,选取的三角形法预测结果更具有适用性。更多还原

【Abstract】 With the rapid development of urban construction, dewatering in foundation pit is an important step of deep foundation pit in the construction process, and also is the key to ensuring foundation pot draw safety construction. The impact of precipitation leading to the surface subsidence around, which has been caused widespread attention by the industry, but there is still lack of more precise calculation for the moment. At present, the engineering foundation delamination summation-method calculation used calculation around the surface subsidence value often large difference to data of engineering precipitation. Based on the measured data of the settlement of settlement prediction method than the traditional method forecast more practical. This paper compares the settlement based on the measured data of commonly used method for predicting method ,a triangle, index method and parabolic method.this area on the engineering example after subsidence prediction precipitation calculated, and the engineering measurement data comparison analysis. Analysis found that, triangle method and engineering monitoring data for this region is high quite close to water level mucky soil, selection of triangle method for forecasting result is more applicability.更多还原