Load box for testing open caisson with self-balancing method

Abstract

The invention discloses a load box for testing an open caisson with a self-balancing method, which comprises a load box body, hydraulic oil cylinders, hydraulic oil pipes and a hydraulic loading device. The hydraulic oil pipes and the hydraulic loading device are connected with the hydraulic oil cylinders sequentially; the load box body comprises an upper annular steel plate, a lower annular steel plate, an outer annular baffle board and an inner annular baffle board, wherein the upper annular steel plate and the lower annular steel plate are vertically opposite, the inner annular baffle board and the outer annular baffle board are arranged on the inner sides and the peripheries of the upper annular steel plate and the lower annular steel plate respectively, and the inner annular baffle board and the outer annular baffle board form a closed box body with the upper annular steel plate and the lower annular steel plate. When the hydraulic oil cylinder is preloaded, the upper annular steel plate and the lower annular steel plate can vertically move respectively; the hydraulic oil cylinders are arranged in the load box, the bottoms of the hydraulic oil cylinders are fixedly connected to the upper annular steel plate, pistons of the hydraulic oil cylinders are contacted with the upper annular steel plate; and the load box for testing the open caisson with the self-balancing method further comprises displacement transferring devices for testing displacement of the upper annular steel plate and the lower annular steel plate. The load box is reliable, practical and economical.

Description

technical field [0001] The invention relates to a load box used for caisson self-balancing test. Background technique [0002] The caisson is one of many foundation types, usually a shaft-like structure made of reinforced concrete. The caisson not only has high rigidity and high bearing capacity, but also occupies a small area and can be built on land or in water. In addition to being used as a general basis, caissons are often used in various underground structures and structures, such as underground parking lots, underground roads, underground pools, large chemical storage tanks, mine shafts, shore water intake structures, and container terminals. , breakwaters, etc., this foundation form is often used when the foundation needs to bear huge loads. Therefore, it is particularly important to understand the bearing capacity of caissons, and the field static load test is recognized as the most effective and accurate test method. [0003] As we all know, there are two tradit...

AI Technical Summary

Problems solved by technology

The main problems are: the former must solve the load source, stacking and transportation problems of hundreds of tons or even thousands of tons, and the latter must set up multiple anchor piles and reaction girders, which is not only expensive and takes a long time, but also Easily limited by tonnage and site conditions

Conventional load boxes are solid inside and cannot be directly used for caisson self-balancing tests. Moreover, due to the huge size of caissons, load boxes are usually prefabricated in factories. For large-sized load boxes, transportation has become another problem

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