Grouting bag for grouting and lifting of ballastless track and manufacturing and using method thereof

Abstract

The invention relates to a grouting bag for grouting and lifting of a ballastless track and a manufacturing and using method of the grouting bag. The grouting bag is formed by selecting and sewing materials high in strength, small in thickness, good in breathability and small in dry heat shrink rate, the length and shape of the grouting bag are determined according to the structural size and settling volume of the ballastless track, one end of the grouting bag is closed, the other end of the grouting bag is open, a grouting pipe is inserted into the open end of the grouting bag, an opening of the grouting bag is tightened around the grouting pipe, the rest of a bag body is tightly folded and wound outside the grouting pipe, and cloth bags of corresponding shapes and sizes are numbered according to the different lifting amounts. Before grouting, the correspondingly-numbered grouting bags with the grouting pipes inserted are inserted into correspondingly-numbered grouting holes in the lower portion of the ballastless track. In the grouting process, the grouting bags are completely opened under grouting pressure to the designed shape and size, and then the upper ballastless track can be precisely and controllably lifted. Then, grouting materials in the grouting bags are fast hardened, and the ballastless track is supported and located at a set position.

Description

technical field [0001] The invention belongs to the technical field of maintenance and repair of ballastless tracks of high-speed railways, and in particular relates to a grouting bag used for grouting and lifting of ballastless tracks in subsidence and a method for making and using the same. Background technique [0002] Ballastless track is the most advanced track technology in the world today, and it is the main track structure type used in the construction of high-speed railways in my country. my country's new Beijing-Tianjin, Shanghai-Hangzhou, Shanghai-Nanjing, Wuhan intercity, Zhengxi, Wuhan-Guangzhou, Beijing-Shanghai, High-speed railways such as Harbin-Dalian, Jingshiwu, Hangzhou-Ningbo, Ninghang, Hefu, Jinqin, Shanghai-Kunming, Lanxin, Haqi, Ning'an, Zhengxu, Shendan all use ballastless track type. Ballastless track has technical advantages such as high smoothness, good stability, long service life, good durability, and less maintenance workload. The railways have ...

AI Technical Summary

Problems solved by technology

However, after increasing the adjustable amount of the fastener system, the pads of the fastener system need to use integral pads to maintain the stability of the track structure. Due to the different settlements in different locations, the overall pads used in each fastener system The thickness of the fastener system is not the same. In this way, different overall pads need to be molded separately, which is costly. In addition, the increase in the adjustable amount of the fastener system is limited. For the track structure that continues to sink with the extension of operation time , this approach also has limitations

Another method is to use grouting materials for grouting lifting and filling, such as the patent "Application of injection method to lift the settlement of railway ballastless track bed settlement system and method (201310027717.0)", patent "high-speed railway ballastless track lifting polymer Grouting method (201310123669.5), but these methods have problems such as uncontrollable expansion of the grout at the bottom of the ballastless track, poor lifting effect, and difficulty in achieving precise and controllable lifting of the track structure; moreover, there are many grout spills during the grouting process , material waste is large, and economic cost is high

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