Steel truss foundation pit support structure

Abstract

The invention discloses a steel truss foundation pit supporting structure, which comprises a plurality of steel truss guard posts, wherein every two adjacent steel truss guard posts are connected with each other through a breast board between the piles to form a supporting piling wall; each steel truss guard post is a square space truss; each square space truss comprises four steel pipes; on two opposite side faces formed by the four steel pipes, a truss is formed by fixed web members welded on the steel pipes; detachable web members are distributed on the other two opposite side faces; and truss nodes on the two earth-retaining side faces of the truss formed by the fixed web members are connected with load conversion plates through bolts. In the invention, pile sinking and pulling construction can be performed according to the characteristic that a middle-high frequency vibration hammer can be used for hoisting a sunk pile and a pulled pile, so that the construction is flexible and mechanical; the steel truss guard piles and guard supporting members can be combined optionally according to the stress requirement, and relevant members can be processed into standard members, so thatthe assembling flexibility is achieved; and all members can be recycled, so that the national strategy requirements of environmental protection and energy conservation are met.

Description

【Technical field】 [0001] The invention relates to temporary foundation pit support in the field of industrial and civil buildings, and is particularly suitable for solving the problem of foundation pit support where mud and quicksand may occur. 【Background technique】 [0002] When excavating a foundation pit, the construction space of an underground structure, its side walls are likely to collapse into the pit, and a temporary reinforcement structure must be constructed to retain the soil to ensure the safety of the foundation pit and underground structures. The safety of existing structures around the foundation pit. [0003] Deep foundation pit support engineering is a special engineering structure, which has the characteristics of complexity, variability and temporary. At present, my country's support structure mainly includes two parts: retaining wall and support (earth anchor). Support forms are divided into two categories: reinforced support and retaining support. ...

AI Technical Summary

Problems solved by technology

Although the steel can also be recycled, cement mixing piles are still needed to stop the water, and the rigidity against horizontal force is relatively poor. Therefore, more horizontal supports need to be installed. The materials used are also easily deformed, and the scope of application is limited.

[0014] To sum up, the existing foundation pit support structures except steel sheet pile support must waste a lot of resources. According to the calculation and analysis of related projects, in a medium two-story basement foundation pit At least 100t of steel and 2000m of concrete will be wasted in the project 3 Above, amazing waste

At present, the most economical steel sheet pile does not have a good water-stopping measure, and due to the limitation of the steel size and construction equipment, this support form requires multiple horizontal supports, the deformation of the foundation pit is large, there are many procedures, and there are many hidden dangers in the project

Foundation pit engineering is a relatively risky project. Since there is no ideal foundation pit support structure so far, engineering accidents often occur, causing damage to urban pipe networks and cracking and uneven settlement of adjacent buildings. Wait

[0015] In view of this, the inventor made in-depth research on the defects of waste of materials, many processes, difficult quality control, and long construction period in the prior art, and only then did this case arise.

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