Vibration pressurizing quick solidification soft foundation processing method

Abstract

The invention discloses a processing method for quickly concreting soft groundsill by vibrating pressurization, characterized in: firstly deposing well sites according to the required clearances and depths and vacuumly pumping water in the to-be-processed stratum to form vacuum negative pressure; when making vibrate-impacting pressurization in the stratum according to the required clearances and depths, forming positive pressure; synchronously making vacuum water pumping and vibration above once and overlapping negative and positive regions and forming higher hydrodynamic force gradient, and finally finishing quick concretion of soft soil in short time. And its beneficial effects: having less deposition after processing, and having advantages of short processing time, better processing effect, lower manufacturing cost, etc, and having good economic benefits and wide application prospect.

Description

technical field [0001] The invention relates to a method for treating saturated soft soil foundation along rivers, rivers and lakes, especially by combining the positive pore water pressure generated by disturbing the soil with the vibratory flushing method and the negative pressure generated by vacuum pumping, synchronously and multiple times in a short period of time. It is a soft ground treatment method that is used to drain water under the action of high dynamic hydraulic transfer rate (vibration pressurization) over time, so that the soil can be quickly consolidated, the bearing capacity can be increased, and the post-construction settlement can be reduced. It belongs to the soft soil in geotechnical engineering. Ground treatment technology field. Specifically, it is a method for rapid consolidation of soft ground by vibration boosting. Background technique [0002] 1. Soft ground treatment has broad application prospects [0003] With the reduction of available land ...

AI Technical Summary

Problems solved by technology

[0004] 2. Insufficiency of traditional foundation treatment methods

[0005] At present, the commonly used treatment methods for soft soil mainly include drainage consolidation method, soil cushion replacement method, rolling and compaction method, replacement and mixing method, etc. These methods have their own scope of application. Almost most of the soft foundations except peat soil with extremely poor performance mainly include surcharge preloading method and vacuum preloading method. The settlement of the foundation can be completed in advance, and the bearing capacity of the foundation can be improved through the consolidation of the foundation soil, and the preload will be removed after reaching the requirements. This method has three disadvantages: first, it needs a large amount of earthwork nearby, and the cost is relatively high; If the loading height is too high, it will cause slope stability problems; the third construction period is longer

The vacuum preloading method is to lay a sand cushion on the foundation to be treated, and set up a vertical drainage channel (plastic drainage board or sand well), then seal the sand cushion with a film, and use a vacuum pump to clean the sand cushion and the vertical drainage channel. Carry out pumping to reduce the vacuum degree under the film, and at the same time accelerate the foundation consolidation under the action of atmospheric pressure, and stop pumping after reaching the requirements. The disadvantages of this method are: firstly, the bearing capacity of the foundation is limited, generally about 80kPa; The second construction period is longer

The soil replacement method is to dig out the soft soil in the foundation and replace it with high-strength, high-density sand, gravel or lime soil. This method is more suitable for local small amount of soft foundation treatment. Soft foundation treatment is economically unreasonable and wastes construction time

The rolling and compaction method is a method to compact the foundation soil and increase the strength at the same time by using certain mechanical equipment. The advantage of this method is that the construction period is short and the strength is significantly improved, but it is generally only suitable for non-cohesive soil and miscellaneous filling. Soil, unsaturated cohesive soil, etc., not suitable for soft soil with high water content and extremely low strength

Images