Fractured rock mass subgrade quadrangle anchoring anti-uplift pressing shifting foundation and construction method thereof

Abstract

The invention relates to a four-corner anchored anti-pullout and pressure-shift foundation of a cracked rock mass foundation, which includes an upper plate embedded in the cracked rock mass and whose upper surface is higher than the ground, four hairpin bolt bodies, four backing plates and four anchors plate. The upper plate is quadrilateral, with an anchor hole I arranged at each of its four corners; an anchor hole II is arranged in the center of each backing plate; the bottom ends of the four hair anchor rods are anchored, and the top ends They pass through one of the anchor holes I of the upper plate respectively, and pass through the anchor hole II of one of the backing plates to connect with one of the anchor plates; It is composed of drawn filaments, the lower part of the stretched filaments is bundled with the water-resistant explosives equipped with detonators, and the said stretched filaments are evenly distributed around the said water-resistant explosives equipped with the detonators along the circumferential direction. The invention also discloses a construction method of the foundation. The invention has a simple structure, fundamentally changes the foundation form and construction method, saves investment and reduces spoil.

Description

technical field [0001] The invention relates to the reinforcement and foundation form of a fissure rock mass, in particular to the four-corner anchorage anti-pull and pressure movement foundation of a fissure rock mass foundation and a construction method thereof. Background technique [0002] For fractured rock mass, structural plane is one of the main controlling factors of its physical and mechanical properties. The existence and characteristics of structural plane play a decisive role in controlling the deformation, destruction and scale of fractured rock mass. [0003] Most of the foundations are compression foundations, that is, the foundation mainly bears the vertical load imposed by the superstructure and meets the deformation and stability requirements, typically including independent foundations, strip foundations, raft foundations, etc. The uplift-resistant foundations mainly include large-scale excavation foundations, excavation-excavation foundations, and explos...

AI Technical Summary

Problems solved by technology

[0004] As far as the anti-compression foundation is concerned, the cracked rock mass is a good natural foundation, and its construction is very simple; and on the cracked rock mass foundation, whether it is a large-scale excavation foundation, excavation and bottom expansion foundation, or explosive expansion pile foundation The construction of these projects is relatively difficult, and there are problems such as large amount of engineering, long time consumption, high cost, and great damage to the environment, but the resistance that can be provided is limited, and the reinforcement effect is not ideal. For example: large-scale excavation of foundations The main size of the foundation is determined by the requirements of its uplift stability. In order to meet the requirements of uplift stability, the size of the foundation must be increased, which will inevitably increase the spoil and aggravate the damage to the environment.

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