Light foamed soil for high speed railway station maintenance and change filling

Abstract

The invention discloses a light foamed soil for high speed railway station maintenance and change filling. The light foamed soil contains the following composition materials by weight: 240-280 parts of cement, 60-80 parts of an active mixed material, 120-140 parts of water, 2-6 parts of an expansive agent, 10-18 parts of a foam stabilizing agent, 6-12 parts of a foaming agent, 3-10 parts of a water repellent, and 4-8 parts of a micro-foam agent. The light foamed soil also includes ceramsite lightweight aggregate with an adding amount accounting for 10%-35% of the total volume. The obtained light foamed soil has the characteristics of compact filling, good foam stabilizing effect, high strength, difficult cracking and good flexibility, is lighter than general civil engineering materials, can avoid environment destruction caused by high fill and high cut and the like when applied to filling engineering construction, and under the circumstance of ensuring constant load, can greatly enhance the filling height, reduce the influence of filling on the foundation, and has very obvious load decreasing effect under the circumstance of insufficient ground bearing capacity.

Description

Technical field [0001] The invention belongs to the field of material preparation, and in particular relates to a lightweight foamed soil used for the maintenance and replacement of high-speed railway stations. Background technique [0002] The gradual popularization of high-speed rail transportation has greatly increased the speed of trains. As a result, the maintenance of the corresponding platform ground also needs to be upgraded. In order to ensure the fast and normal transportation of high-speed rail, the construction of these subsidiary projects requires more advantageous materials. Come for construction. [0003] Especially in a high-traffic environment, if the foundation bearing capacity of the platform is insufficient and the foundation is uneven, it may cause foundation settlement and road collapse. High-speed railway platforms that are old and the platform surface is too low will encounter heavy rain. It is easy to cause stagnant water and affect the normal travel of pa...

AI Technical Summary

Problems solved by technology

[0003] Especially in the operating environment with high flow of people, if the bearing capacity of the platform foundation is insufficient and the foundation is uneven, it may cause foundation settlement and road surface collapse. It is easy to cause water accumulation and affect the normal travel of passengers

Therefore, according to the existing construction methods, the foundation or platform can be reinforced and compacted, and the method of backfilling soil can be used for replacement and backfilling to repair and increase the elevation of the platform. Traditional filling materials are mostly covering soil and ordinary silicate base. Foamed soil or sulphoaluminate cement-based foamed soil, but the slow setting time of ordinary silicate-based foamed soil will cause the foamed soil to collapse and sink easily, while the surface of sulphoaluminate cement-based foamed soil is easy to pulverize, The bond between the bonded mortar and the bonding mortar is not tight, which will affect the safety and stability of the entire foundation or platform, and whether it is covering soil or ordinary foam soil, the weight is relatively large and the strength is low, which will undoubtedly affect the bearing capacity of the foundation. great influence

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