Annular embedded arrangement foundation used for shallow cover layers or bare rock areas in water

Abstract

The invention discloses an annular embedded arrangement foundation used for shallow cover layers or bare rock areas in water. The annular embedded arrangement foundation comprises base grooves located in water bottom base rock, prefabricated open caissons and rock-socketed concrete. The bottom ends of the prefabricated open caissons are located in the base grooves. The space between the prefabricated open caissons and the base grooves is filled with the rock-socketed concrete. The base grooves are annular grooves vertically extending downwards. The shape formed after each annular groove is cut along the horizontal cross section is matched with the shape formed after each prefabricated open caisson is cut along the horizontal cross section. The annular embedded arrangement foundation is simple in structure and convenient to operate and use, advantages and disadvantages of traditional foundations in water are sufficiently taken into consideration in the annular embedded arrangement foundation, and by means of the technical measures of forming the annular grooves in the water bottom base rock, adopting the prefabricated double-wall steel open caissons and conducting post-pouring on the rock-socketed concrete, a series of problems faced by application of large-diameter deep hole drilling cluster pile foundations and open caisson foundations in the shallow cover layers and the bare rock areas are solved.

Description

technical field [0001] The invention relates to an underwater foundation form, which belongs to the technical field of bridge engineering, and specifically relates to a ring-shaped embedded foundation mainly used in shallow covering layers or bare rock areas where underwater foundations are to be built in rivers, lakes, seas, etc. Background technique [0002] With the rapid development of the national economy, the demand for traffic construction has soared, and more and more large bridges are being built and are about to be built at home and abroad, and with the emergence of cross-sea bridges, the spans of bridges are getting larger and larger. Most of these long and large bridges are built on deep and fast-flowing rivers or seas with harsh environments. They often encounter problems such as deep buried rock formations, exposed bedrock, and complex geological conditions, which are very unfavorable for bridge construction and difficult for foundation construction. Also bigge...

AI Technical Summary

Problems solved by technology

[0004] 1. Large-diameter and deep-drilled group pile foundations have a large foundation size, and the structure has poor adaptability to river bed changes, erosion and other conditions; pile group effects are obvious, and accurate calculation of pile foundations is difficult

During the construction, it is necessary to set up many complex processes such as construction platforms, guide frames, and steel cofferdams, and the water operation procedures are cumbersome and the operation time is long

[0005] 2. To set up caisson foundations conventionally, it is first necessary to carry out underwater blasting and slag removal at the bottom of the water, and use large-scale machinery to excavate the bottom to the bearing layer to form a frustum-shaped rock foundation pit. The excavation workload is heavy and leveling is difficult

[0006] 3. For areas with strong wind and waves, it is difficult to accurately locate the lowered caisson; after the lowered caisson is put in place, it is difficult to construct the anti-scouring (bottom protection) layer around the caisson and the construction workload is heavy

Although the invention can be used for the construction of deep-water bridge foundations, the excavation workload of the caisson foundation is large, and the water operation process is cumbersome and the operation time is long when the caisson is installed.

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