A lifting method applied to large caisson

Abstract

The invention discloses a jacking method applied to a large caisson. The jacking method includes the following steps that firstly, main air bags are laid; secondly, primary jacking is conducted; thirdly, front-side auxiliary air bags are laid; fourthly, front-side cushion layers are laid; fifthly, secondary jacking is conducted; sixthly, rear-side auxiliary air bags are laid; seventhly, middle lower-side auxiliary air bags are laid; eighthly, rear-side cushion layers are laid; ninthly, the cushion layers are balanced; and tenthly, the air bags are removed. Compared with an original traditional method, the jacking method has the beneficial effects that all the air bags are different in pressure intensity, the front edge and the rear edge of the caisson are jacked to be at different heights multiple times, and a manner for multiple times of supporting and cushioning is adopted in the process, so that the pressure intensity of the jacking air bags can be reduced, higher safety is achieved in the construction process, and practicability is high; and in addition, the jacking height of the caisson can be effectively increased, the requirement for shipping larger caissons is met, the application range of shipping the caissons through the air bags is better enlarged, and the jacking method can be rapidly popularized in the whole industry.

Description

technical field [0001] The invention relates to the technical field of on-site construction, in particular to a jacking method applied to large caissons. Background technique [0002] At present, the application of caissons in domestic gravity wharves is very common. After the caisson is prefabricated in the land prefabrication yard, it needs to be moved to a large ship through the wharf, and then transported to the site for installation. The jacking of the caisson to the design height is the most difficult point of construction. [0003] Currently, there are two methods of jacking up such large caissons: [0004] One construction technique is to lift the caisson off the ground with jacks or water-injected capsules. Since the caisson is located on the trolley in this lifting method, there is no requirement for the jacking height, and it only needs to be off the ground. Currently, the largest The weight of the caisson is 9000t. This method of transportation is efficient an...

AI Technical Summary

Problems solved by technology

Compared with the previous method, the caisson airbag jacking and transportation process does not require the construction of complicated tracks and has lower requirements for foundation treatment, but the height of the caisson jacking is greater than the height of the subsequent construction interspersed with rolling airbags. For large caissons, its When the synchronous jacking process is used to lift the caisson, the jacking air bag has a strong pressure, and the cost of manufacturing the ultra-high pressure air bag is high, and there is a large safety hazard during construction, resulting in a small weight of the jacking caisson by this process , which limits the spread of the process

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