Jiehe Steel Structure Strengthening Technology of Chenzhou Steel Structure Design and Strengthening Institute
Time is moving forward, and other things are aging at the same time. Let's take the house we live in every day for example. I believe that if you carefully look at your house, there will be some cracks, and you don't know how to choose the technology of house reinforcement? Please take a look at the following introduction.
Which steel structure reinforcement company to look for? Find shortcuts and reinforce. Jiehe Reinforcement, focusing on structural reinforcement for 20 years!
Pipe sinking method
(Pier reinforcement) In the pipe sinking method, the workers must wear diving suits, respirators, oxygen pipes, ropes, and air compressor yes The Conduit Supply air internally and inject fresh air. Under the condition of continuous air supply, the diver goes down the well to remove Head 。 Remove the upper opening first wall Reduce the tightness of the wall, remove the middle and lower layers of the wall one by one, then lift the removed objects, clean the construction site, and open the rain and dirt Water pipe 。 Before underwater riprap revetment construction → measurement before riprap → laying geotextile → throwing test → positioning ship positioning → putting the riprap into gear → throwing by excavator → measurement and inspection after throwing → moving to the next throwing position after passing the test. The air in the pipe is vented from the south to one end, and the pipe gradually sinks from the north to one end to the south until the whole pipe sinks in place.
The sinking speed must be controlled during the sinking, and the construction personnel shall coordinate with each other to make the pipeline sink evenly, so that the force on the pipeline is controlled within the allowable range. After the sinking of the pipe section is completed, the diver shall check the mud sticking of the whole pipe, and carry out paving, filling, flushing and suction mud treatment for local overhead and high starting points. When crossing pipes, most of the suspended vessels shall have been anchored and placed in their respective positions. The horizontal tube shall be started 1 hour before the tide is gentle and the diversion starts. Fix the north pipe end with a crane boat to keep a certain distance between the pipe end and the embankment, so as to prevent the pipe fittings at the pipe end from being damaged when crossing the pipe. One 300HP tugboat and two 45HP anchor boats are used to pull out the north end of the steel pipe from the north bank to the south bank. When the steel pipe is dragged to 2/3 of the river surface, the speed of dragging the pipe shall be slowed down, and the pipe shall be slowly flowed to the south bank by using the existing water flow. At this time, the tugboat shall control the speed of the horizontal pipe of the steel pipe.
The same is true of the marine engineering equipment used on the Hong Kong Zhuhai Macao Bridge. The Hong Kong Zhuhai Macao Bridge has provided too much information to further develop marine engineering equipment so that it can better cope with waves and weather problems. A few days ago, the Guangzhou Daily omni media reporter took a battery car to visit the kilometer subsea tunnel composed of 33 immersed tubes. The launching speed of the immersed tube has also kept breaking records from the early two months, 7 days, 6 days, 4 and a half days -- [By the middle and late stages of the prefabrication of the immersed tube, everyone's construction skills have reached the level of "being able to solve problems", "Zhang Hong said that in the seven years of construction of the Hong Kong Zhuhai Macao Bridge, what impressed Zhang Hong was the terminal joint of the immersed tube tunnel of the Hong Kong Zhuhai Macao Bridge. It is to retain or even strengthen the steel strand between the small pipe joints, strengthen the connection between the small pipe joints, so that the deformation of the 180 meter long standard pipe joint formed by the connection of eight small sections is more constrained, and enhance the anti dislocation ability of deeply buried immersed pipes. This kind of Lin Ming is still true when he is in distress, at the end of 2013.
(Pier reinforcement) Telephone consultation of underwater reinforcement unit construction company of immersed tube method Up to now, a total of 17 bridge pile foundations have been repaired and reinforced in the underwater foundation maintenance and reinforcement works of Nanchang Bridge and Bayi Bridge, and 7 are under construction. It is estimated that Wufengshan Bridge will be completed in the first quarter of next year, which is an important channel for Lianhuaiyang Town to cross the river, while Jiajiang Bridge is the control project of its north approach bridge. The reporter learned yesterday that the construction of the three underwater main piers of Jiajiang Bridge has been completed, and the construction of the pier shaft has been transferred. According to the current construction schedule, the pier shafts of three underwater main piers will be completed before and after March 20. It is expected that by the end of March, Jiajiang Bridge in * * * Yangzhou section of Lianhuaiyang Town will turn to the construction of superstructure and start pouring cast-in-place beams, and strive to achieve bridge closure by the end of October. The telephone consultation data from the construction company of the underwater reinforcement unit is the basis of scientific research, and exploring the sea is the mission of hydrologists. For this glorious mission, the scientific researchers of the Surveying and Mapping Department have always rushed to collect every data faithfully at the forefront of the waves, and promoted the development of water transportation with wisdom and courage. In November 2014, the placement of E15 immersed tubes of the Hong Kong Zhuhai Macao Bridge was once blocked due to sediment siltation, and the project stalled.
At 18:00 on July 12, the Ministry of Transport and the Ministry of Water Resources Nanjing Institute of Water Resources Science, Sun Yat sen University and the Fourth Harbor Engineering Institute of CCCC successfully installed the E28 immersed tube in the rear section of the straight section of the tunnel of the Hong Kong Zhuhai Macao Bridge undersea tunnel. So far, the tunnel has a total length of 4860 meters. The person in charge of the CCCC Hong Kong Zhuhai Macao Bridge Island Tunnel Project introduced. "Chen Yue, director of the chief engineer office of the Hong Kong Zhuhai Macao Bridge, said that the crane ship hull was significantly affected by wind, waves and currents, the surplus water depth in the construction sea area was limited, and there was a risk of the ship grounding or collision with the sunk pipe due to insufficient cable force, which also meant that the requirements for the marine environment were more stringent. After repeated argumentation by experts, the final plan was finally formed -- the future scene was like this: flying in the sky. ② This website does not indicate that [The source is [Zhongshan Daily], [Zhongshan Business Daily], [Zhongshan Website] and other articles/pictures are reprinted. The reprinting of this website for the purpose of transmitting more information does not mean that we agree with their views or confirm the authenticity of their content. For example, if other media, websites or individuals download and use from this website, we must keep this website note. The second reason is that we are not afraid.
(Pier reinforcement) The Coastal and Estuary Research Center and the Surveying and Mapping Office of the immersed tube method were ordered to rush to the scene to assist the expert group in finding the cause. The content of block stones and impurities shall not exceed 1%. The weight of block stones shall meet the design requirements. Each construction pile bent area shall be cast in a quantitative manner. According to the design riprap thickness, it shall be converted into riprap volume. The riprap volume shall be cast in several times and recorded in the construction drawing one by one to check whether the riprap volume meets the design requirements It has a very high piezoelectric coefficient, hundreds of times of that of quartz crystal. Piezoelectric material quartz crystal: quartz crystal has two types: natural and artificial. Within the temperature range of several hundred degrees Celsius, its dielectric constant and piezoelectric coefficient almost do not change with temperature, but when the temperature rises to 573 ℃, quartz crystal will lose its piezoelectric characteristics Due to the existence of water, underwater welding makes the welding process more complex, and there will be a variety of problems not encountered in land welding. At present, various underwater welding methods are being applied and studied in various countries, and the more mature application is electric arc welding. With the development of underwater welding, in addition to the commonly used wet underwater welding.
At the estuary of the Pearl River, the construction of submarine immersed tunnels is destined to be a difficult problem. In the waters of Hong Kong, Zhuhai and Macao, where rivers and seas meet and the hydrology is complex, a dozen large ships are used to float huge immersed tubes weighing 80000 tons, which is like a huge [formation]. How to install them in the submarine trench with high precision is called the [Mount Everest] of the transportation industry. After E11, we realized the significance of deep trench for our project, so we buried more difficulties there. Before going up, the immersed tunnels were shallow buried, generally not more than 3 meters deep, but we buried more than 20 meters here. But after we dug such a deep trench, there was a gear phenomenon for the entire ocean current structure. The steel consumption is about 10000 tons, which is equivalent to a medium-sized ship hull. There are 32 pipe joints in the project, with a total steel consumption of 320000 tons. The total steel consumption of the stadium [Bird's Nest] is about 110000 tons, which means that the steel consumption for the construction of the immersed tube tunnel of the deep and medium passage is equivalent to the construction of about 3 [Bird's Nest]. The Hong Kong Zhuhai Macao Bridge is 55 kilometers long, which is a long sea crossing bridge under construction. And to achieve the demanding installation accuracy, etc., of course, the difficulties also include that the local construction area is extremely soft and of various types of soil, the deep buried tunnel pipe joints should bear very high overburden load (thickness of 20 meters,,), and the tunnel has a large single span of pipe joints.
It is mainly used to pad the bottom of foundation trench, including scraping, sand blasting, pressure injection and pile foundation methods. Sand blasting method: sand pump is used to inject sand and water mixture from the water surface to the bottom of the pipe section through the nozzle under the pipe section to fill the gap. The thickness of sand cushion is about 1m. Three L-shaped steel pipes are hung on the outside of the bench that can move longitudinally along the track, and the middle is the nozzle and the two sides are suction pipes. Foundation treatment for pipe sinking method construction I. The pressure grouting method is to inject cement mortar or sand to the bottom of the pipe section as the pipe section foundation after the pipe section is settled. According to the different injection materials, there are two kinds of grouting method and sand grouting method. Grouting method: When the foundation trench is opened, it shall be over excavated by about 1m, and then a layer of 40~60cm thick crushed stone shall be paved. After dumping and stacking sand and stones on both sides to close the sill, inject mixed mortar composed of cement, bentonite, yellow sand and retarder through the reserved grouting hole in the tunnel. Sand injection method: similar to grouting method, but the grouting material is sand water mixture.
Jiehe Reinforcement, focusing on structural reinforcement for 20 years! Relying on the construction qualification and construction team, and reasonable price, Jiehe Reinforcement sincerely hopes to cooperate with all walks of life in the construction, help you solve the problems of project reinforcement, transformation and quality, and provide considerate services for all walks of life with excellent quality! The company's slogan is: "Survival by quality, development by reputation"! Over the years, the company has completed thousands of building structure reinforcement and transformation projects with rich construction experience. We hope that in the process of cooperation and development, we can achieve mutual benefit and win-win results!
Strengthening methods of brick and tile houses in rural areas
1. For brick houses with slightly cracked walls, we need to repair the cracks by pouring cement concrete.
2. The brick and tile houses in the countryside are all of wooden girder structure. Some of them have been in disrepair for years, and have been eaten by insects. The rodent bites have caused corruption. For this kind of wood, we need to replace it with new wood, carry out anti-corrosion treatment, and apply anti-corrosion paint
3. Or simply replace the girder with a steel frame structure, which is more secure and not easy to damage.
4. For brick walls, the surface shall be reinforced, and the walls shall be thickened with concrete
5. Parapet walls have been built in tile houses in rural areas. Now brick and tile structures rarely catch fire, so single parapet walls are easy to collapse and can be demolished
6. For the old and broken wall that has been out of repair for a long time, simply remove it and build it with concrete to increase its strength.
The above is about the introduction of house reinforcement. I believe you have seen the above content and have a certain understanding of house reinforcement. House reinforcement itself is a good reinforcement technology. Chenzhou Housing Reinforcement Company has a professional reinforcement technical team, so you are worth choosing.
