A bulk cargo wharf yard foundation contained a weak layer of muddy clay, although two side foundations of the yard were reinforced by cement mixing piles. However, a sliding failure as well as lateral translation collapse occurred where the thickest muddy clay was during the fill of ore heap on trial. In order to find the real reason for the sliding failure and lateral translation collapse and to provide the design basis and reference for repair, a large centrifugal model, test was conducted. The filling process of the ore heap was simulated, and the vertical and horizontal displacement deformation of the surface of the ore heap and the yard foundation was measured. Firstly, the turning points of the displacement and deformation development were identified, and the critical point of stability and the ultimate bearing capacity of yard foundation were obtained. Secondly, based on the displacement field on the cross section of yard ground under the load of the ore heap, the failure mode and the development process of the sliding and translation failure of the bulk cargo wharf foundation were analyzed and discussed. The results showed that in the filling of the ore heap, its shallow subsoil subsidence and sliding failure first appeared due to its insufficient bearing capacity. Secondly, the subsidence of shallow subsoil occupied the space of underlying soft muddy clay layer, forcing it to lateral translation towards the side of the Nanliu River, resulting in a wider range of collapse.

For the slipped soft soil foundation in the storage yard of a wharf, the root pile-net composite foundation is used. The centrifugal model test are carried out to study the effects of cushions on the bearing behaviors of single root pile. The bearing deformation difference of single pile between the centrifugal model tests and the field static loading tests is compared and analyzed. The test results of the vertical ultimate bearing capacity of single pile are compared with the calculated ones by the China's code method. The results show that the cushions have significant effects on the ultimate bearing capacity of single root pile which is the largest under reinforced cushion layer, followed by sand cushion layer and non-cushion. There are obvious differences between the Q-S curves of the centrifugal model tests and field static loading tests. The ultimate bearing capacity of single pile of the centrifugal model tests is greater than that of the field static loading tests. The calculated values of the vertical ultimate bearing capacity of single pile are lower than those of the centrifugal model tests and the field static loading tests.

For the soft soil foundation slipped in the storage yard of a wharf, the composite foundation with CFG pile net is used for reinforcement in typical zone. The centrifugal model tests and field static load tests are carried out to study the bearing behavior of CFG pile. The bearing deformation difference of single pile between the centrifugal model tests and the field static load tests is compared and analyzed. The test results of the vertical ultimate bearing capacity of single pile are compared with the calculated ones by the method recommended by China's technical code for composit foundation. The results show that there are obvious differences between the Q-s curves of the centrifugal model tests and field static load tests. The ultimate bearing capacity of single pile of the centrifugal model tests is greater than that of the field static load tests, and their maximum test loads are basically the same. The calculated values of the vertical ultimate bearing capacity of single pile are lower than those of the centrifugal model tests and field static load tests.

沿海港口航道疏浚施工后期遇到硬点及岩石层,扫浅难度加大,扫浅施工就成了整个疏浚工程中起到画龙点睛作用的步骤,水下扫浅施工工艺众多,新技术层出不穷,但适用条件各有特点.本文通过一个工程案例,对航道疏浚扫浅阶段发现的硬点及岩石层,采用凿岩锤处理,对凿岩及扫浅工艺进行了探讨,以期对类似工程具有借鉴意义.

本文介绍了PHC桩在我国沿海高桩码头工程中的应用与裂缝检测现状,以某南方沿海高桩码头工程PHC桩在工程建设阶段产生的裂缝情况为例,分析研究了裂缝成因,并提出了应对措施,很好地解决了案例中的工程建设任务,具有借鉴意义.

To implement related national environmental laws and regulations,the bulk cargo terminal of Xiashan Dis-trict of Zhanjiang Port has built a 4 000 m wind-proof dust-suppressing wall,providing valuable experience and guidance for constructing the wind-proof dust-suppressing wall at southern coastal bulk cargo terminal in respect to steelwork structural design,selection of dust-suppression plate material,and safety construction,etc.

The direct loading chute used at No.300 berth loading station of Zhanjiang Port shows an unsatisfactory ap-plication effect,with problems such as frequent faults,too much dusts,and large energy consumption. The swing loading chute transformer from the direct loading chute can realize energy-saving,environmental protection,and labor strength re-duction,providing experience for transformation of other loading stations at port.

To adapt to a changed arrangement of cargo sources and improve the utilization rate of berths,which in turn leads to a maximization of the berth benefits,Zhanjiang Harbor conducted technological transformation on the loading/unloading/storage/conveyance system for the berths No.300 and 301.In the technological transformation,steel trestles and transfer houses functioned as supports for the belt conveyor involved.This essay describes the welding techniques used for the steel trestles and transfer houses.