港航码头狭窄水域浮泥清除中平板驳辅助耙吸船的应用

为探究平板驳船和耙吸挖泥船组合机械在港口航道码头前沿狭窄水域浮泥清理中应用的技术要点,以某港航工程为例,对码头前沿浮泥淤积的原因展开分析,进而对耙吸挖泥船、抓斗船及泵吸船等常规清淤方式的优劣势进行比较,提出该航道浮泥清理所适用的船舶组合方案;对平板驳船选型、驳船长宽尺寸确定以及施工技术要点等展开分析研究。结果表明,平板驳船和耙吸船组合工艺能较好发挥两种船舶技术优势,提升浮泥清除效果的同时,还能确保码头既有建筑物及船舶自身安全,在码头前沿狭窄水域清淤中具有广阔的应用前景。

真空预压法软基处理工程的施工技术和管理

本文以真空预压法软土处理工程施工为切入点,阐述了真空预压加固原理,结合具体航港码头施工工程,从砂垫层施工及管理、塑料排水板施工及管理、真空预压施工及管理三个方面,对真空预压法软基处理工程施工技术及管理进行了简单的分析。并结合具体数据,对真空预压法软基处理工程监测及效果进行了深入探究。

Seismic Fragility of Approach Bridge for the Large Port Terminals

In order to study the seismic performance of typical approach bridge for port project, the seismic vulnerability model was created. 100 of the earthquake motion records are selected from the database of Pacific Earthquake Research Centre, In order to obtain the maximum responses of structure dynamic response, the model was calculated by using non-linear time history analysis. Then reliability analysis method was used to generate the fragility curves of bridge components. And compared two kinds of bearing made differences to structure＇ s vulnerability. Researches show that bearing is easy to breakdown with earthquake action. Isolation bearing has good effect, and significantly reduces failure probability, fmaUy the fragility curves obtained can be used to evaluate the seismic performance of continuous beam bridge for port project, and provide the basis for seismic design of bridges for port project.