Follow-up support system for building jacking construction

Abstract

The invention relates to bridge heightening technology, in particular to a follow-up support system for building jacking construction, which comprises a follow-up casing and a follow-up hydraulic cylinder. The follow-up casing is provided with an upper support surface and a lower support surface parallel to each other and is provided with at least one cavity perpendicular to the upper support surface and the lower support surface. Each cavity is provided with an opening on the lower support surface. The follow-up hydraulic cylinder is sleeved into the cavity. The follow-up casing and the follow-up hydraulic cylinder are respectively fixed at the bottom of a superstructure, or fixedly connected with each other prior to being integrally installed at the bottom of the superstructure, and the upper support surface is attached with the bottom of the superstructure. The follow-up support system is high in safety and reliability, good in synchronousness, high in operability and high in overall stress performance and reliability guarantees bridge jacking safety.

Description

technical field [0001] The invention relates to bridge heightening technology, in particular to a follow-up support system for building jacking construction. Background technique [0002] At present, in the reconstruction of rivers, railways and highways, the clearance of bridges and the connection between the alignment of existing bridges and the alignment of new bridges are difficult issues in the reconstruction. At present, many highway bridges across rivers in China are facing the problem of reconstruction due to insufficient clearance under the bridges. For the reconstruction of old bridges, the traditional method is to demolish and rebuild the old bridges, which will consume a lot of financial and material resources, and the long construction period will have a great impact on society. As a new type of bridge reconstruction technology, bridge jacking technology has the advantages of reasonable economy, short construction period, and less impact on the social environme...

AI Technical Summary

Problems solved by technology

[0005] 1. In this method (system), a micrometer is used to measure the distance between the supporting device and the superstructure to control the lifting of the supporting device. This design concept is difficult to realize in actual construction

Different from the field of machining technology, in the field of building construction technology, it is generally impossible to achieve high precision, and the flatness of the bottom of the upper structure is relatively poor. In this environment, there will be large errors in the use of micrometers

[0006] 2. Even if the above-mentioned error factors are put aside, the above-mentioned follow-up support system still has problems that cannot be overcome

However, when the jacking hydraulic cylinder loses pressure and falls back, the load changes instantaneously. At this time, the upper structure will fall almost without support, which is very dangerous during construction.

[0007] 3. The servo motor mounted on the following support device is relatively large, which makes the plane size of the follow support device large and difficult to install during use

[0008] From the above discussion, it can be seen that the automatic following support system and method have certain insurmountable defects in actual use, and there are still relatively large risks when applied to bridge jacking construction.

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