Static load test device for asymmetric counter weight

Abstract

The invention discloses a static load test device for an asymmetric counter weight. The static load test device comprises a main frame, a counter-force amplifying device and an auxiliary device, wherein the counter-force amplifying device comprises upright posts used for supporting the fulcrums of a front lever and a back lever; weighting platform counter-force F transmitted by a jack is amplified to nF when being transmitted from a pressure input plate to a pressure output plate, so as to load the asymmetric counter weight. The static load test device is clear in principle, and reasonable in structure, and has the advantages that the counter weight of a static load test is greatly reduced; powerful guarantee is provided for large-tonnage or super-tonnage static load tests; engineering cost is reduced while engineering time is saved; the safety is improved; the application market and the developing prospect are wide.

Description

technical field [0001] The invention relates to the technical field of geotechnical engineering foundation piles and foundation bearing capacity detection, in particular to a static load testing device with an asymmetric counterweight. Background technique [0002] The existing domestic research on static load test devices and methods has made some progress in improving test efficiency and safety, especially the large tonnage and super large tonnage devices have achieved the following results: [0003] (1) Chinese patent application number 201510385480.2 introduces a static load test device for pile foundations. By designing the shape of the pile counterweights, the placement position between the pile counterweights is fixed, so that the center of gravity of the entire pile structure is at At the jack, it solves the problem of the balance point of a large amount of stacking in the stacking method, which improves the stability and safety of the ballast platform. The counterw...

AI Technical Summary

Problems solved by technology

[0007] 1. The existing counterweight methods are all symmetrical counterweights, that is, the design load is equal to the counterweight load (the ideal state has no load loss), and the difficulty and cost of the test increase with the increase of the design load;

[0008] 2. The static load test with large counterweight tonnage is subject to various restrictions (such as the bearing capacity of the main girder of the ballast platform, site conditions, safety, etc.), which cannot be implemented on site or is extremely difficult to implement, and the technical requirements are high;

[0009] 3. The support of the ballast platform has high requirements on the bearing capacity of the foundation. If the bearing capacity of the foundation is insufficient, the ballast platform is easy to tilt or even collapse, which may cause the test to fail, or cause equipment damage and casualties;

[0010] 4. The stacking center of gravity is high, the overall stability of the device is poor, and the reliability is low;

[0011] 5. When the counterweight is large, the loading time is long, the labor cost is high, and the test progress is slow

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