三重管喷射注浆法加固湿陷性土地基

某炼油厂减压塔座落在湿陷性地基上。经改建，荷载增大，地基需进行加固处理。通过比较，决定采用三重管喷射注浆法对湿陷性土地基进行加固。本文详细介绍了早强剂选用、施工工艺、施工进度控制、沉降观测等方面的技术问题。

关于强夯在湿陷性粉土地基处理中的应用

随着我国基础建设的快速发展,强夯法作为具有设备简单、施工便捷、适应范围广、节省劳力、节约材料、降低投资及施工期短等优点的地基处理方法得到广泛应用。强夯法不仅可以提高地基土的强度、降低其压缩性,还可消除其湿陷性,特别在粉土地基处理中效果显著。

关于强夯在湿陷性粉土地基处理中的应用

任何工程项目建设,都要在地基处理方面高度关注,这是非常基础的组成部分,同时产生的影响力非常高。湿陷性粉土地基的处理难度较大,传统的技术应用效果薄弱,而且在地理的稳定性方面难以充分的提升。强夯技术的应用,符合湿陷性粉土地基的需求,在地基性质改造、地基稳定性提升、地基寿命延长方面具有非常好的效果。但是,强夯技术必须设计完善的方案,对强夯过程的每一个环节开展科学的把控。

Experimental study on improving collapsible loess with cement

The collapsibility of loess ground can directly affect stability of subgrade. Therefore, how to adopt practical technical measures to reduce or eliminate its collapse deformation is an important content in foundation design in collapsible loess zone. Selecting collapsible loess from Fuxin-Chaoyang highway in Liaoning, the authors conducted a series of tests for improving loess with cement. The loess in different water content was mixed with the cement in varying proportions, unconfined compression strength for the samples at four different curing periods were tested, and the relationships of improved soil strength among cement mixture ratio and curing periods were analyzed. When the curing periods are certain, the strength of loess increases along with the mixture ratio increases; when the cement mixture ratio is 5%-15%, the scope of increases is quite obvious; when the mixture ratio is greater than 15%, the tendency of intensity increases turns slow. When the mixture ratio for the specimen is certain, the intensity of the test specimen increases along with the curing period increases, the intensity grows obviously in 28 days, and the growth rate is small in 28-90 days, the intensity tends to be steady in the curing period of 90 days.

钢储罐地基处理方案设计

油品钢储罐设计现状:近年来,随着国民经济的快速发展,国家对原油、成品油的需求日益增大。各地相继新建了许多大型油罐,另外,石化装置钢储罐的数量、单罐容量及总容量也越来越大。如2005年投入使用的中石化白沙湾油库15万立方米储油罐、2012年建成的曹妃甸国储库15万立原油罐组,大型油罐建设遍地开花。大型储罐基础荷重大、因工艺要求对沉降要求敏感,需要更高的地基承载力和地基稳定性。目前建于软土、湿陷性黄土、岩石土等各种复杂地质条件上的罐基础已愈发普遍。这就对储罐基础的设计提出了更高的要求。