Novel building backfill material

Abstract

The invention discloses a novel building backfill material. The novel building backfill material comprises a base material, a cementing material, an additive and water. The backfill material has the beneficial effects that a foundation pit fertilizer groove can be densely filled without vibration by means of self fluidity, initial setting of the backfill material can be completed within 12 hours by means of hydration reaction of the cementing material, and the strength of the backfill material after initial setting is enough to provide a working surface for subsequent backfill. Compared with atraditional foundation pit backfill process, the novel backfill material does not need vibrating and tamping, and the backfill efficiency and quality are obviously superior to those of the traditional process.

Description

technical field [0001] The invention relates to a backfill material, in particular to a novel building backfill material, which belongs to the technical field of underground engineering construction. Background technique [0002] In recent years, with the development of underground engineering, the depth of building foundation pits has been continuously deepened. Due to the limited space for ground construction, the width of the fertilizer tank in the foundation pit is generally controlled at 0.6m~1.0m, and the width of the supporting structure waist beam in the fertilizer groove is generally 0.2m~ 0.4m, which leads to a very narrow space for backfilling the fertilizer tank of the foundation pit, and it is very difficult to implement layered backfilling and tamping in the fertilizer tank, and the construction quality is difficult to control. Inadequate backfilling of the fertilization tank of the foundation pit will cause scattered water in the building, subsidence of the br...

AI Technical Summary

Problems solved by technology

[0002] In recent years, with the development of underground engineering, the depth of building foundation pits has been continuously deepened. Due to the limited space for ground construction, the width of the fertilizer tank in the foundation pit is generally controlled at 0.6m~1.0m, and the width of the supporting structure waist beam in the fertilizer groove is generally 0.2m~ 0.4m, which leads to a very narrow space for backfilling the fertilizer tank in the foundation pit, and it is very difficult to implement layered backfilling and tamping in the fertilizer tank, and the construction quality is difficult to control

Inadequate backfilling of the fertilizer tank of the foundation pit will cause water to disperse in the building, subsidence of the bricks on the ground, deformation and rupture of the household pipes in the fertilizer tank, and leakage of the pipeline will further wash away the fertilizer tank, causing hollowing in the fertilizer tank, and in severe cases, rainwater will pour into the fertilizer tank , so that the overall destruction of the underground structure due to insufficient buoyancy resistance

[0003] The backfilling of the traditional fertilizer tank is backfilled with plain soil or lime soil in layers, and the small tamping machine is compacted in layers. The traditional fertilizer tank backfill method is constructed in the deep, large and narrow space of the fertilizer tank. The construction quality is difficult to control and the construction period is long. The quality of backfilling is to use low-grade plain concrete to backfill the fertilizer tank. Although this can ensure the backfill quality of the fertilizer tank and the backfilling period, the cost of the backfill project is relatively high, and the strength of the plain concrete is higher after backfilling. It is difficult to excavate the fertilizer tank during pipeline maintenance. Based on this, the application proposes a new type of building backfill material

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