Foundation pit expansion bolt type pre-stressed anchor rod applying mechanism and construction method thereof

Abstract

The invention discloses a foundation pit expansion bolt type prestressed anchor rod applying mechanism and a construction method thereof.The applying mechanism comprises a foundation pit side slope and an anchor rod, the anchor rod is installed on the foundation pit side slope, the side, penetrating through the foundation pit side slope, of the anchor rod is sleeved with an anchoring section expansion bolt type sleeve, and the end of the other side of the anchor rod is sleeved with a nut; a connecting gasket is arranged between the foundation pit slope and the nut; the construction method comprises the steps of punching, anchor rod blanking, sleeve sleeving, early warning system mounting, grouting, flexible gasket mounting and prestress applying. The novel expansion-bolt-like sleeve is adopted, the length of the anchoring section is reduced, the construction difficulty is reduced, meanwhile, the anchoring effect is enhanced, the traditional mode that large machines are adopted for applying prestress is changed, the construction technology is simplified, an introduced novel early warning system can conduct early warning in advance, real-time monitoring of foundation pit displacement can be achieved, and the construction efficiency is improved. And a three-dimensional displacement diagram with a better visual effect is presented.

Description

technical field [0001] The invention relates to the technical field of foundation pit construction, in particular to an expansion bolt type prestressed anchor applying mechanism for foundation pits and a construction method thereof. Background technique [0002] The construction industry is a very important industry in the country, and the update of related construction techniques has played a vital role in the development of this industry. Especially during the construction of engineering foundation pits, foundation pit collapse accidents always pose a huge threat to the life safety of construction workers and property safety. In order to prevent the collapse of the foundation pit, soil nail walls, prestressed anchor rods, engineering piles and other means are often used to support the foundation pit in the project. In the support of shallow foundation pits and foundation pits with a scale of no more than 10 meters, soil nailing walls are the most common support method. H...

AI Technical Summary

Problems solved by technology

The most important thing is that this support method leads to the inevitable lengthening of the anchor section to bear the prestressed tension of the free section, and the lengthening of the anchor section not only increases the difficulty of construction, but also increases the construction cost

In addition, this prestressing method cannot solve the problem of recycling support materials. Once the building is positive and negative, before the soil needs to be backfilled, the support materials of the foundation pit will be buried under the soil with the backfill soil of the foundation pit, resulting in a large number of support material is wasted

Images