Injecting paste material for administering soil rising of plate-type ballastless track and preparation method and application method thereof

Abstract

The invention provides an injecting paste material for a plate-type ballastless track. The injecting paste material includes a component A and a component B, wherein the component A includes the following materials in parts by weight: 40-80 parts of polyhydric alcohols, 5-10 parts of cross-linking agents, 1-50 parts of plasticizers, 4-20 parts of chain extenders, 1-50 parts of diluents, 0.1-10 parts of curing accelerators, 1-5 parts of antioxygen, 1-5 parts of coupling agents, 0.04-0.2 part of water and 0.5-5 parts of foam stabilizer; the component B includes the following materials in parts by weight: 50-150 parts of isocyanate or isocyanate prepolymers and 1-50 parts of diluents; when temperature changes, a component C or D can be added into the mixture of the components A and B to meet the construction requirements at different temperatures, the solidification strength of the injecting paste material is not influenced by humid environment, and the mechanical properties of the material are excellent.

Description

technical field [0001] The invention belongs to the field of building materials, and in particular relates to a grouting material which can be used for regulating slab-type ballastless track turning and mud-flowing, as well as a preparation method and a use method thereof. Background technique [0002] my country is carrying out the construction of large-scale passenger dedicated lines and high-speed railways. As my country's high-speed railways are about to gradually form the framework of "four vertical and four horizontal" passenger dedicated lines, the fast passenger transport systems in the Bohai Rim, Yangtze River Delta, and Pearl River Delta regions will be built. Ballastless tracks will become The main choices of various passenger dedicated lines and high-speed rail. Compared with the ballasted track, the main feature of the ballastless track is that it cancels the ballast and replaces it with a concrete base. At the same time, the structural form of the sleeper (slab)...

AI Technical Summary

Problems solved by technology

However, because the cement is solidified into a hydration reaction, it takes a long time and it is difficult to meet the requirements of opening to traffic after 4 hours at the skylight point; and the high-strength resin grouting method has the following disadvantages: (1) Commercially available grouting materials are mostly used in tunnels and bridges The compressive strength and elastic modulus of the materials are low for waterproof plugging or crack repair in dyke and dam projects; (2) The commercially available grouting materials have poor compatibility with graded crushed stone and concrete bonding, that is, the bonding strength is low, and moisture cannot The graded gravel is bonded into a whole, and the reinforcing effect is small; the expansion pressure of the material has not been tested, the grouting volume is small, the filling is not full, the reinforcing effect is not good, the grouting volume is large, and the material expansion pressure is large, resulting in the concrete base The plate is arched, causing the track structure to be uneven, causing secondary damage to the track structure; (3) The gel time is long, which cannot meet the structural inspection of the track during grouting, and the track structure is often raised after the grouting is completed; (4) The curing time is long, and it is difficult to meet the requirements of opening to traffic after 4 hours of skylight; (5) The moisture resistance condition is poor, and the roadbed graded gravel in the southern area is relatively humid. Out of proportion, bad curing

At present, it is difficult for general grouting materials to meet the above requirements

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