乐昌防撞安全车出租 防撞缓冲车租赁 开工大吉 Lechang crash safety car rental crash buffer car rental starts

Lechang anti-collision safety car rental anti-collision buffer car rental kaigong University Jixin Yuelu bridge free consultation hotline 135-0000-3760, Ms. Fang, wechat mobile phone with the same number, online all year round, contact at any time. Because there are full-length transverse cracks at the continuous section of the bridge deck, the tensile deformation at the bridge deck is not large when jacking the beam, and there will be no new cracks in the beam body, so it is not necessary to chisel out the continuous section of the bridge deck during jacking. When jacking the beam, just jack up all beams on the same bent cap synchronously. When the whole beam is jacked up, the interaction of internal stress between beams caused by inconsistent jacking speed is very complex. According to previous experience, when the maximum lifting height difference between each beam is controlled within 1mm of the average lifting height during jacking, the continuous structural safety of beam body and bridge deck can be ensured. Due to the improvement of the traditional jacking process, the jacking equipment shall be adjusted accordingly. The jack shall be placed under the horseshoe at the beam end. In the past design, there is no excessive consideration on the replacement spacing of the jacking support in the future. After the field survey, it is found that the distance between the horseshoe at the beam end and the top of the bent cap is generally 7.8-8.8 cm, Lechang anti-collision safety car rental anti-collision buffer car rental kaigong University Jixin Yuelu bridge free consultation hotline 135-0000-3760, Ms. Fang, wechat mobile phone with the same number, is online all year round and can be contacted at any time, so the thickness of the jack should meet the requirements of spacing.

In order to meet the travel requirements of jacking (replacing the support), we have established a professional Jack manufacturer and specially produced special-shaped jacks. The 10 jacks of the same pier are controlled by one oil pump, so that the 10 jacks are synchronized. The bearing is the connection point of the upper and lower structures of the bridge. Its function is to safely transfer the load of the upper structure to the bridge pier and abutment, and ensure the free deformation of the upper structure under the action of load, temperature change, concrete shrinkage and creep and other factors, so as to make the actual stress condition of the structure conform to the calculation diagram, and protect the beam end, pier and abutment cap beam from damage. In some beam bridges built in the early stage, there is a common problem that the bearings are out of maintenance for a long time, the rubber bearings are aging day by day, and the steel plates are rusted and invalid. Some simply supported bridges with small span are not equipped with bearings originally, which makes a series of problems appear under the current load of large tonnage and large traffic volume, so it is urgent to replace and repair the bearings. At the same time.

Due to the needs of transportation, uninterrupted or as short as possible traffic interruption puts forward higher requirements for the replacement and maintenance of bearings. Therefore, the maintenance of bridge bearings is extremely important. The single width of the hollow slab beam on the bridge is composed of 8 pieces. During the maintenance and construction, it is necessary to stop the driving on the bridge, seal the road in half, chisel the unbroken guardrail and continuous joint, and jack up the slab beam in the whole half before the support replacement and maintenance. According to the actual situation of the site, the gap between the bent cap and the hollow slab beam is small, and jacks and other jacking equipment cannot be directly placed. Bailey sheet steel frame must be set up under the bridge as the supporting structure. The form of Bailey sheet is 3.0m long and 1.5m wide. The stiffness is guaranteed by the welding combination of standard section steel and connected with standard supporting bolts, The assembly stiffness of the reinforced Beret is guaranteed by a part of the bars. The insufficient space shall be filled with standard sleepers or steel plates. The jack is a pump with 10 combined special oil pumps and Jack sets made in Liuzhou with 60t oil roof. The length of oil pipe must meet the actual situation on site.

The platform is adjusted with sleepers and 2cm thick steel plates, and the jack group has been calibrated before use. During winter construction, the quality of concrete, reinforced concrete and prestressed concrete works shall also check the ambient temperature of concrete during pouring and curing. 1) Heating temperature of concrete water and aggregate. 2) Heating and curing methods of concrete, etc. The inspection results shall be recorded in the concrete construction records and temperature inspection records respectively. 3) The temperature of aggregate and mixing water when they are loaded into the mixer, the temperature of concrete when it is poured out from the mixer and the temperature during pouring shall be checked at least 3 times in each working shift. Lechang anti-collision safety car rental anti-collision buffer car rental kaigong University Jixin Yuelu bridge free consultation hotline 135-0000-3760, Ms. Fang, wechat mobile phone with the same number, online all year round, feel free to contact