Recyclable front-assembled supporting envelop enclosure and applying method thereof

Abstract

The invention belongs to the technical field of foundation pit engineering and particularly relates to recyclable front-assembled supporting envelop enclosure and an applying method thereof. The recyclable front-assembled supporting envelop enclosure comprises a coping plate, at least two groups of steel tubes, a cemented soil wall, a front-assembled structural steel support frame, a pit bottom cushioning layer and a supporting buttress. The cemented soil wall is positioned below the coping plate and perpendicular to the coping plate, end portions of the two groups of steel tubes are connected and fixed with the coping plate, the inner group of steel tubes positioned on the inner side of the two groups of steel tubes are perpendicular to the coping plate and positioned in the cemented soil wall, and an angle is formed between the other group of steel tubes and the inner group of steel tubes. The front-assembled structural steel support frame is arranged perpendicular to the middle of the cemented soil wall, and the pit bottom cushioning layer and the supporting buttress are both positioned below the cemented soil wall and are integrated. The recyclable front-assembled 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.

Description

technical field [0001] The invention belongs to the technical field of foundation pit engineering, and in particular relates to a recyclable pre-assembled supporting 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 the wall...

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

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