Flowing backfill and preparation and construction method thereof

Abstract

The invention relates to a flowing backfill, belonging to the field of civil engineering. The flowing backfill comprises the following components by weigh part: 100 parts of cement, 500-1000 parts of soil and 250-450 parts of water, wherein the ratio of the cement and the soil is controlled between 0.1 and 0.2, and the ratio of the water and a solid material is controlled between 0.41 and 0.43. A construction method of the flowing backfill comprises the following steps: firstly, clearing a foundation pit; secondly, preparing the flowing backfill according to the requirements; finally, carrying out on-site pouring and maintaining, wherein the pouring of the flowing backfill can be pumped or filled in the specified position by the diversion of sliding grooves without compacting or vibrating, and after completing the pouring, the flowing backfill needs to be covered with alpine meadow soil to be maintained for over 24h before allowing vehicles and pedestrians to pass through. The flowing backfill provided by the invention has the characteristics of self-compacting, environmental protection, economy, adjustable strength and the like, and is suitable for bridge abutment backfill, road widening subgrade backfill, underground engineering and pipeline construction backfill and the backfill of construction foundation pits with narrow operating space and the like.

Description

technical field

[0001] The invention belongs to the field of civil engineering, and in particular relates to a novel civil engineering material. The material is especially suitable for backfilling of bridges and culverts, backfilling of road widening subgrades, backfilling of underground engineering and pipeline engineering, and backfilling of small building foundation pits. technical background

[0002] During the road operation period, due to the different settlements of the backfill soil on the back of the abutment and the bridge deck, the joint between the road surface and the bridge deck cracks, forming a road surface with different heights, and vehicles jump and impact when passing, which causes additional damage to the bridge culvert and the road surface The impact load makes the driver and passengers feel bumpy and uncomfortable, and even causes the vehicle to decelerate sharply, which can lead to serious traffic accidents. This phenomenon is called bridge head jumpi...