Where can I rent a bridge engineering car in Lianzhou? A pier reinforcement car for rent

Where can I rent a bridge engineering car in Lianzhou? The pier reinforcement car can be rented. The free consultation hotline of Xinyue road and bridge is 135-0000-3760. Ms. Fang, the same number of wechat mobile phone, is online all year round and can be contacted at any time. When the temperature of the bridge structure fails to meet the following requirements, the temperature of the bridge structure shall be checked. Since many bridges (mainly hollow slabs and T-beams) built in China in the 1990s, it is found that the rubber bearings of most bridges have been damaged and displaced after years of use. Therefore, the rubber bearing will be replaced after it is damaged in a certain year, and these bridges still bear important transportation tasks. In order to ensure the driving safety and smooth traffic of the bridge, the old bearing must be replaced under the condition of continuous traffic. There is no way to replace the rubber bearing with an ordinary jack. The use of air bag Jack in the jacking process of bridge girder is a newly developed jacking equipment in recent years. It is mainly equipped with air bag rubber pad, high-pressure rubber hose, air pressure diverter, high-pressure air pump, braking system, electronic monitoring, etc. The air bag jack is made of high-quality rubber steel wire material. Relevant technical indicators: the maximum design stress is 1.6Mpa and the maximum load is 40t; The geometric dimensions of the airbag are: 70cm long, 58cm wide and 3cm thick. Due to its small structural size. Where can I rent a bridge engineering car in Lianzhou? The pier reinforcement car can be rented. The free consultation hotline of Xinyue road and bridge is 135-0000-3760. Ms. Fang, the same number of wechat mobile phone, is online all year round and can be contacted at any time.

In particular, the ultra-thin thickness realizes the requirement of small construction space that cannot be met by other jacks. Therefore, the "ultra-low height air bag Jack" can directly jack on the bent cap, which is suitable for the jacking of hollow slab beams and objects with small jacking clearance. "Ultra low height air bag Jack" not only meets the requirements of direct jacking on the bent cap and small jacking clearance in terms of structural size, but also fully meets the relevant requirements in terms of stress analysis during jacking construction. In order to ensure the smooth progress of engineering construction, the stress and deformation of hollow slab are analyzed, and the mechanical calculation is carried out, focusing on understanding the internal changes of the structure after stress. The calculation model and parameters take a 30m span hollow slab bridge as an example to mainly calculate the transverse stress of the hollow slab, especially the transverse stress of the bottom plate. The analysis and calculation are carried out according to the plane stress model, and the element adopts 8-node isoparametric element. The longitudinal stress length is conservative, and the length l-70cm along the bridge of the airbag is used.

For 30m span hollow slab bridge, the calculated load: the dead weight of the beam is 43T and the dead load of phase II is 9t. Calculation results through finite element calculation, the maximum shear stress of the beam body in the process of bearing replacement construction is 1.03mpa. Maximum principal tensile stress of beam body 5. - 3.33mpa, which is greater than the allowable principal tensile stress of C40 concrete under load combination II in normal service stage [D: -] 2.34mpd; It is very close to the allowable principal tensile stress [δ] of C40 concrete in flexural members at the construction stage - 3.38mpa. However, considering that the range of large principal tensile stress is small, and the conservative assumption that only 70cm beam in the longitudinal direction is involved in the stress is adopted in the calculation, the principal tensile stress of the beam is basically in the safe range during the jacking process. Maximum principal compressive stress s of beam body:== 2.73mpa, far less than the allowable principal compressive stress of C40 concrete in normal use stage - 18.2mpa. Therefore.

The principal compressive stress of the beam body meets the specification requirements. In order to solve this problem, our company has successfully developed a separate controllable jacking system based on many years of preloading construction experience and the company's existing technical advantages. The system can safely and quickly replace the damaged support without damaging the bridge structure (and not damaging the continuous system of the bridge deck) and unilaterally breaking the traffic under the condition of ensuring the normal operation of the uninterrupted traffic of the bridge. The system can be divided into hydraulic separated controllable automatic jacking system and pneumatic separated controllable automatic jacking system. For the construction process of "ultra-low height air bag Jack", the main steps of construction are: preparation, roof test, overall jacking, support replacement, beam body falling, etc. The following is a typical project construction. 3.1 project introduction a hollow slab girder bridge has 19 beams in each span, the deck width is 20m, the deck pavement is a continuous structure, and the hollow slab girder is a reinforced concrete prestressed structure. The single beam is 0.99M wide and 1.2m high.

30m long. The section of single beam is a two box chamber structure. The top and bottom plates are 20cm thick, the two outer webs are LCM thick, the middle webs are 8cm thick, and the self weight of single beam is 43T. Two plate rubber bearings are set at the single end of each beam, with the size of 14cm × 14cm × 3cm, no bearing pad stone. It has been 9 years since the bridge was opened to traffic, and the bearing has been seriously damaged due to the passage of long out of gauge vehicles. In order to ensure the safety of the bridge, the owner decided to replace the bearing. For the correct positioning of rubber bearing, the bearing and bearing pad stone shall be accurately positioned according to the design requirements. When erecting and dropping beams, the longitudinal axis of T-beam shall coincide with the center line of support; The longitudinal axis of plate girder and box girder is parallel to the center line of support. In order to drop the beam accurately, when erecting the first span slab beam or box beam, the cross centers of the two supports can be marked at the bottom of the beam, and the lead straight line of the center lines of the two supports can be marked on the end elevation of the beam. When dropping the beam, make it coincide with the center line on the pier and abutment. The next several spans can be based on the first span beam. Where can I rent a bridge engineering car in Lianzhou? The pier reinforcement car can be rented. The free consultation hotline of Xinyue road and bridge is 135-0000-3760. Ms. Fang, the same number of wechat mobile phone, is online all year round and can be contacted at any time.