The hottest V-shaped rubber strip has brought near

"V" type rubber strip brings nearly ten million benefits to tunnel construction

according to the traditional process, the construction team can use the grinder to cut the ring of the tunnel lining after the tunnel construction is completed, which is time-consuming and labor-consuming, and is not conducive to saving construction costs. Now only a rubber ring is needed to solve the problem

brings us great convenience

"V" type rubber strip brings nearly ten million benefits to tunnel construction

"a small invention can bring nearly ten million benefits to tunnel construction." Recently, it was learned from the Anliu Railway Project Department of Guizhou company of China Railway fifth bureau that the "V" construction joint technology invented by the staff of the project department has effectively solved the problem of tunnel lining cracking disease that crosses karst geology in a large area

in recent years, China has entered the high-speed rail construction and development period one year ago, and many high-speed railways have been opened to traffic in the southwest region. It is understood that in the past tunnel construction process and the tunnel completion acceptance, the longitudinal and circumferential crack diseases existing in the tunnel lining construction, and the later treatment and maintenance costs are extremely high, which brings extreme winds to the project cost control, and requires corresponding yuan to carry out the risk of expression. Zhao Yu, the inventor of this technology and the project manager of the Anliu railway project department, said that according to the traditional technology, the construction team can only use the grinder to liner the tunnel after the tunnel construction is completed The experimental process can dynamically switch the control mode, stepless speed change and stable transition; Cutting the ring with masonry is not only time-consuming and labor-intensive, but also not conducive to saving construction costs. Now only a rubber ring is needed to solve the problem

the specific method is to embed half of the "V" type rubber strip at the front circumferential construction joint and the whole "V" type rubber strip at the rear circumferential construction joint before pouring the secondary lining concrete, release the circumferential and longitudinal pressure and tension through the "V" type notch, and eliminate the circumferential and longitudinal cracks caused by uneven stress distribution at the secondary lining concrete construction joint

"this rubber ring can be reused for more than 20 times. It takes 2 days for traditional cutting machines to cut a ring, and an average of 7 to 8 slices need to be replaced." Zhao Yu said that after calculation, a 1000 meter long tunnel can save 300000 yuan in construction costs after using this technology. There are 78 tunnels in total, totaling more than 60 kilometers, which can save more than 18 million yuan. (source: China Plastics Machinery)