汕头东部城市经济带建设工程海堤堤心吹填砂夹淤处理

Construction of Seawall Embankment in Eastern Shantou Urban Economic Belt

汕头东部城市经济带建设工程海堤堤心吹填砂设计要求采用含泥量不高于10%的砂土,且相对密度不小于0.65。但部分堤段在施工过程中由于堤心砂取料区料源存在淤泥夹层及吹填绞吸厚度难控制等原因,堤心砂存在淤泥夹层、含泥量高等问题,不利于海堤安全稳定。为确保海堤安全稳定,通过对吹填料进行地质复勘后分析海堤堤身夹淤情况,并进行专题研究,提出了合理可行的工程处理措施。海堤夹淤处理后,经多年运行,堤身稳定,沉降很小,运行状况良好,结果表明:此次堤心吹填砂夹淤处理措施可行有效,可为类似工程提供参考。

The design of dredger fill for sea embankment in tile eastern urban economic belt of Shantou requires the sand with a clay content of not more than 10% , and the relative density is not less than 0. 65. However, in the course of the construction of the embankment, because of the existence of silt interlayer and the technology of dredger filling, the core sand of the embankment has the problems of silt interlayer and high mud content, which is not conducive to the stability and safety of the seawalls. In order to ensure the stability and safety of the sea embankment, through the geological reconnaissance of the blows, the siltation of the sea （like body is analyzed, and the special research is carried out, and the reasonable and feasible engineering measures are put forward. Alter many years of operation, the embankment is stable, the settlement is very small and the operation condition is good. The result shows that the treatment measures of the dredger fill sand clamp are a successful application, which can provide reference for similar projects.