Combined pile foundation structure suitable for coral reef geology and construction method of structure

Abstract

The invention discloses a combined pile foundation structure suitable for coral reef geology. The combined pile foundation structure comprises a pre-stress pipe pile and a steel tube upright column, the lower end of the pre-stress pipe pile is inserted into the rock-soil, and a cast-in-place pile is arranged in the lower section of the pre-stress pipe pile; the steel tube upright column is locatedon the upper side of the pre-stress pipe pile, the steel tube upright column sleeves the outer side of the pre-stress pipe pile, an annular hollow grouting space is formed a certain distance away from the steel tube upright column, the pre-stress pipe pile and the steel tube upright column are partly overlapped and sleeved with each other, and the overlapped part in the hollow grouting space is filled with a grouting material; and the upper portion of the steel tube upright column is exposed out of the rock-soil and is used for being connected with an external structure. According to a combined pile foundation, the circumferential friction resistance of the cast-in-place pile and the high strength of the pre-stressed pipe pile are fully used so that the weight of the pile foundation can be greatly reduced, and the design length of a pile body can be reduced. The structure is particularly suitable for foundation construction under coral reef geological conditions, can meet requirementsof the severe marine environment, can be assembled and quickly constructed, is environmentally friendly and efficient, and has good economic benefits.

Description

technical field [0001] The invention relates to the field of combined pile foundation structures. More specifically, the present invention relates to a combined pile foundation structure suitable for coral reef geology and its construction method. Background technique [0002] Pile foundation is widely used in foundation engineering construction in our country due to its advantages of simple construction, low cost and good effect of settlement control. Under conventional geological conditions, pile foundation design theory and design methods based on driven piles, bored piles and steel pipe composite piles have basically been formed. However, research on the foundation structure under the special geological conditions of coral reefs is still in the advanced stage at home and abroad. theoretical research stage. [0003] Practice has proved that under the geological conditions of coral reefs, traditional bored piles have low work efficiency and heavy weight, while steel pipe...

AI Technical Summary

Problems solved by technology

[0003] Practice has proved that under the geological conditions of coral reefs, traditional bored piles have low work efficiency and heavy weight, while steel pipe driven piles are very easy to damage uneven, porous, and brittle coral reef limestone, thereby reducing the bearing capacity of foundation piles; No matter which construction method is used, it is not suitable for coral reef geology. Secondly, in the harsh environment of the open sea, traditional cast-in-place piles or steel pipe piles have disadvantages such as difficult material transportation, complicated construction procedures, poor durability, and easy corrosion.

Images