Ground anchor and counter-force loading type soft foundation prepressing treatment method

Abstract

The invention discloses a ground anchor which comprises a ground anchor rod. A force exerting part and a counter-force loading device are arranged on the upper portion of a ground anchor rod body. The counter-force loading device exerts up-pulling force on the ground anchor rod through the force exerting part, and transmits counter force of the up-pulling force to the lower portion of a counter-force loading device body. The invention further discloses a counter-force loading type soft foundation prepressing treatment method by utilizing the ground anchor. The method includes the following steps that a steel plate with a central reserved hole is arranged on the ground of an area to be treated, the ground anchor penetrates through the central reversed hole of the steel plate, drilling is conducted, and the bottom of the ground anchor rod is enabled to penetrate through or basically penetrate through a soft soil layer of the treated area; and a gasket is screwed on a threaded section through a nut, a spring is compressed, and the steel plate on a foundation is subjected to prepressing loading by means of the spring through the counter force of the up-pulling force exerted on the ground anchor rod. Soil sources do not need to be stacked and loaded, and the foundation instability problem caused by the ultrahigh stacking and loading speed can be avoided. The ground anchor and the steel plate are flexible in plane arrangement, and good engineering adaptability is achieved.

Description

technical field [0001] The invention belongs to the field of construction methods, and in particular relates to a treatment method for ground anchors and counter force loading preloaded soft foundations. Background technique [0002] Foundation treatment technology is an artificial foundation treatment method adopted to improve the bearing capacity of the foundation and improve the deformation conditions or seepage properties of the soil. Existing foundation treatment technologies mainly include: dynamic compaction method, preloading method (including surcharge preloading method and vacuum preloading method), displacement method, vibratory impact method, cement-soil mixing method and gravel pile method, etc. Among them, the preloading method is most widely used in practical engineering. [0003] At present, there are still some problems in the practical application of the preloading method: among them, the construction period required by the preloading preloading method is ...

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Problems solved by technology

[0003] At present, there are still some problems in the practical application of the preloading method: among them, the construction period required by the preloading preloading method is relatively long, a large amount of piled soil sources is required, the treatment depth is controlled by the size of the piled load and the length of the drainage board, and it 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

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