Recyclable vertical steel tube front supporting envelop enclosure and applying method thereof

Abstract

The invention belongs to the technical field of foundation pit engineering and particularly relates to recyclable vertical steel tube front supporting envelop enclosure and an applying method thereof. The recyclable vertical steel tube front supporting envelop enclosure is characterized by comprising a coping ring beam, a cemented soil mixing wall and at least three groups of steel tubes. The cemented soil mixing wall is positioned in the middle and perpendicular to the coping ring beam, and end portions of the three groups of steel tubes are connected and fixed with the coping ring beam. The middle group of steel tubes in the middle of the three groups of the steel tubes are perpendicular to the coping ring beam and positioned in the cemented soil mixing wall, the other two groups of steel tubes are positioned on the inner side and the outer side of the middle group of steel tubes, and angles are formed between the other two groups of steel tubes and the middle group of steel tubes. The recyclable vertical steel tube front supporting envelop enclosure has the advantages of being easy to install and dismantle, convenient to construct, recyclable, friendly to the environment, low in manufacture cost and convenient to popularize, and having reinforced sliding preventing, soil blocking and water retaining functions. By means of the recyclable vertical steel tube front supporting envelop enclosure, anti-sliding capacity and deformation resistance capability of a soil body within an enveloping range are remarkably improved.

Description

technical field [0001] The invention belongs to the technical field of foundation pit engineering, and in particular relates to a recyclable vertical steel pipe front brace enclosure structure for soft soil foundation pits and an application method thereof. Background technique [0002] For foundation pit projects within the excavation depth of 5m in soft soil areas, the enclosure structures currently used in existing support technologies generally adopt cement-soil gravity enclosure walls, steel-cement-soil mixing walls, and slope excavation. [0003] The characteristic of the cement-soil gravity retaining wall is that the retaining structure is composed of vertical and horizontal rows of "grid-like" cement-soil piles that are continuously overlapped. In the slurry construction, the curing agent and the foundation soil are forcibly mixed to form a continuously lapped reinforced retaining wall with a certain thickness and embedded depth, which depends on the self-weight of t...

AI Technical Summary

Problems solved by technology

However, for foundation pits within 5m, the cost per meter is high, and the construction requirements are high, and the quality of cement-soil piles is not easy to control

[0005] Slope excavation is a method of excavating a foundation pit by leaving an inclined soil slope. It is characterized in that without support measures, by increasing the width of the upper opening of the excavation, at the same time, it adopts graded slope, slope protection, precipitation, etc. Auxiliary measures to maintain slope stability can prevent the soil wall from collapsing and keep the slope stable during excavation. It has the advantages of short construction period and low cost. The disadvantage is that the slope ratio is relatively large, and the slope stability requirements must be met at the same time. and catch width requirements, and have a greater impact on the surrounding environment

[0006] In summary, the current foundation pit support structure cannot be recycled and reused to reduce construction costs

Images