Pre-stressed anchor cable and drain plate combined pre-compaction device and foundation treatment method

Abstract

The invention relates to a pre-stressed anchor cable and drain plate combined pre-compaction device. The pre-stressed anchor cable and drain plate combined pre-compaction device comprises a pre-stressed anchor cable and a reaction frame. The pre-stressed anchor cable comprises an anti-pull anchor head, a steel strand and a fixing end. The anti-pull anchor head penetrates into a supporting layer ofa foundation. The upper end of the anti-pull anchor head is connected with the lower end of the steel strand. The outer side of the steel strand is sleeved with the plastic drain plate. A sand cushion is arranged above the plastic drain plate. The upper end of the steel strand is connected with the fixing end. The fixing end is fixed into a central reserved hole of the reaction frame. The reaction frame comprises a concrete face, a reaction frame base, a cross beam and a jack. The concrete face is located on the sand cushion. The reaction frame base is located on the concrete face. The jacksserve as stand columns of the reaction frame. The bottom of the cross beam is connected with the jacks. The pre-stressed anchor cable and drain plate combined pre-compaction device has the beneficialeffects that the reaction frame is lifted by the jacks so as to provide uplift force, so that the pile-loading process is simplified; or the pre-stressed anchor cable and drain plate combined pre-compaction device can be used in combination with a preloading device, and thus, the pile-loading quantity required for design is greatly reduced.

Description

technical field [0001] The invention belongs to the field of foundation treatment, and in particular relates to a prestressed anchor cable structure. Background technique [0002] At present, the preloading method in the foundation treatment technology is widely used in actual engineering, but there are still some practical application problems: the surcharge preloading method requires a relatively long construction period, requires a large amount of surcharged soil sources, and the treatment depth is affected by the pile load. The load size and the length of the drainage board are controlled, which may cause foundation instability; the vacuum preloading method has high technical requirements, the treatment effect is limited by the vacuum level, and the general treatment depth is shallow; [0003] However, Wang Kuihua’s ground anchor and reaction loading preloading soft foundation treatment method compresses the spring by manually tightening the nut, and uses the spring to a...

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Problems solved by technology

[0002] At present, the preloading method in the foundation treatment technology is widely used in actual engineering, but there are still some practical application problems: the surcharge preloading method requires a relatively long construction period, requires a large amount of surcharged soil sources, and the treatment depth is affected by the pile load. The load size and the length of the drainage board are controlled, which may cause foundation instability; the vacuum preloading method has high technical requirements, the treatment effect is limited by the vacuum level, and the general treatment depth is shallow;

[0003] However, Wang Kuihua’s ground anchor and reaction loading preloading soft foundation treatment method compresses the spring by manually tightening the nut, and uses the spring to apply the reaction force of the uplifting force to the ground anchor to preload the steel plate on the foundation. The piled soil source will not be limited by site conditions, but when the soft soil layer is deep, the anchor rod is not easy to reach the bearing layer; and the preload cannot be well controlled by manual pressure, and when the preload that needs to be loaded When the pressure is high, it is necessary to reinstall the force parts of the jack to lift the ground anchor to achieve the pre-pressure value, and the efficiency is relatively low

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