Prestress pressure type anti-floating anchor rod and construction method thereof

Abstract

The invention provides a prestress pressure type anti-floating anchor rod and a construction mode thereof, which are used in the technical field of building foundations and comprise a threaded rod body, a nut, a first steel base plate, an elastic device, a second steel base plate, an anti-corrosion corrugated sleeve, a positioner and a threaded bearing body. Prestress is applied and locked through the anchorage device, the force transmission mode, the construction mode and the prestress applying time of the prestressed anchor rod are changed, the construction efficiency is improved, the prestressed anchorage device is produced and machined in a factory in advance, operation is easy when the prestressed anchorage device is used in a construction site, and when prestress is applied, a nut can be directly screwed through a torque wrench. The requirement on site construction equipment is low, the construction technical difficulty is reduced, and popularization is easy.

Description

technical field [0001] The invention relates to a prestressed pressure type anti-floating anchor rod and a construction method thereof, belonging to the technical field of building foundation foundations. Background technique [0002] When the counterweight methods such as the self-weight of the structure and the building cover cannot meet the water buoyancy of the basement subjected to groundwater, other measures against water buoyancy shall be taken to ensure the stability of the basement. The existing foundation anti-floating technical measures include anti-floating pile anti-floating and anti-floating anchor rod anti-floating. Anti-floating anchors are mostly used in bedrock foundations, which have high bearing capacity. Generally, shallow foundations can be used to meet the requirements of foundation bearing capacity. When the structure does not meet the anti-floating requirements, anti-floating measures should be taken. It is difficult to use a pile driver to form a h...

AI Technical Summary

Problems solved by technology

Usually, the strength level of the cushion concrete is low, and the thickness is only 100mm. If the jack is used to directly stretch the reinforcement, it is easy to cause damage to the cushion, which is not conducive to the locking of the reinforcement, and the locking tension is easy to lose, and the effect of prestressing cannot be achieved. , and the prestressed anti-floating anchor rod is difficult to maintain after stress relaxation due to creep, disturbance and other reasons

[0007] Using the above three kinds of prestressed anti-floating anchor technology, there are many construction procedures, long construction period, and there are a series of problems on the use and safety of the floor

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