Cast-in-place flowable soil stabilization (foamed concrete) for trench and pipeline backfill
1. The fat trench foundation is the part excavated to provide a working surface for the foundation pit. Therefore, when constructing the basement, it is necessary to consider timely backfilling the fat trench. Due to the narrow working area, neither people nor machinery can achieve dense backfilling, making it a major challenge for the project.
2. Cast-in-place fluidized soil (foamed concrete) backfill, featuring adjustable and controllable density strength, dense filling without vibration or compaction, no settlement, easy construction, and moderate cost (patent pending for utility model), suitable for backfilling narrow or irregular spaces such as deep excavation foundations and wide trenches in buildings.
2. Municipal road projects and water supply pipeline protection, with high mobility and wide coverage, require no compaction and post-construction settlement compared to traditional backfilling methods. Includes underground pipelines and other voids across highways, which are prone to collapse. Using fluidized stabilized soil backfilling can address these concerns.
National Intellectual Property Administration
Utility Model Patent Application Receipt
Application Number: 2024200510041
Invention Name: A Casting-in-Place Fluidized Soil Ground Filling Structure
Applicant and Inventor: Liaoning ZheShang Foam Concrete Technology Co., Ltd.
1. The features shown in the right figure include the exterior wall 1, natural ground 2. A foundation trench 3 is provided between the exterior wall and the natural ground. Inside the exterior wall is the indoor ground 4, which is higher than the natural ground outside the wall. A drainage channel 5 is set within the foundation trench 3, and fluidized solid soil 6 is filled in the trench.
2. Composed of cement, admixture, hardener, foaming agent, and water based on the filling structure characteristics, the fluidized stabilized soil 6 consists of general-purpose Portland cement of 32.5 grade or higher, with the admixture being沈阳first and second-grade fly ash. The hardener and foaming agent are used to ensure the fluidity of the fluidized stabilized soil.
3. According to its characteristics, when the cast-in-place fluidized soil is poured into the foundation pit's enrichment trench, it should start filling from the lower end. During the pouring process, the outlet of the pouring pipe should remain level with the pouring surface, and the pouring direction should be from one end to the other along the length of the pouring zone.
4. Upon characteristics, cast the fluidized solid soil in 1 to 3 stages based on the depth of the foundation pit's rich groove, with each pour not exceeding 800-1000mm in thickness. The error after casting completion is ±2mm.
