Through field test and laboratory analysis,this paper makes a complete investigation for cracks of 589 post-ten-sioned prestressing large pipe pile of some harbour wharf which has been operated for more than ten years,analyzes the causes of this action and influential factors,and makes maintenance and strengthing measures.

Based on the summarization of the experience of the use of large-diameter pipe piles in 15 large container terminals in the port area in west Shenzhen during the past 20 years,this paper introduces the making,functions,sinking,bearing capacity of these piles.

It provides valuable experience for construction of large-diameter pipe piles.

According to the construction experience of some large and medium open type wharf on piles and combining with the development trend of open type wharf on piles in China,we analyzed and explored the technology and characteristics of pile foundation structures,such as steel pipe pile,large-diameter pipe pile,PHC pile,etc.

φ1400 pipe pile construction for 300000 dwt ore terminal

A type of covering-sheet pile wharf reduces the earth pressure acting in front of piles,which can be used in deep water situations;double-rowed large pipe pile wharf gives full play of the large pipe piles to endure higher axial strength and bending strength.