In the old bridge reinforcement method, for reinforced concrete and pre-stressed concrete girder bridge using the lower edge of the girder body to set up pre-stressing tie rods or pre-stressing beams, the tensile zone applied to the bridge Sonic Logging Tube reinforcement method, can offset the internal force generated by the self-weight and the external loads, significantly improve its load carrying capacity.
The bridge sonotube method has the following advantages
① The self-weight increase is small, but the bearing capacity can be greatly increased;
② Little influence on the lower part due to little increase in the upper self-weight;
③ simple construction, short construction period, economic benefits;
④ The construction process does not interrupt or less interrupt the traffic;
⑤ Little damage to the original structure, without affecting the clearance under the bridge;
⑥ The stress can be adjusted and the prestressing bundles can be replaced.
Reinforce Solid Body System
The bridge sonotube reinforcement system consists of horizontal tendons, diagonal tendons,upper anchorage points, sliders, bearers, horizontal tendons fixed supports and other components.
The prestressing tendon construction form and construction method of the extracorporeal beam bridge reinforcement structure are quite different from the conventional in vivo bonded or unbonded prestressing tendons. As a result, the calculation method of its prestressing loss is also different. It is shown by calculation. Compared with the general prestressed concrete structure, the prestressing loss of the extracorporeal beam reinforced structure is much smaller, for which the control stress of the prestressing steel should be appropriately reduced. In order to avoid the bridge acoustic pipe tendons in a long-term high stress state, to improve the stress state of the extracorporeal beam structure is favorable.
Post time: Feb-19-2024