CN204298813U - Ash Foundation in a kind of liquefying soil - Google Patents

Abstract

An Ash Foundation in liquefying soil, comprises castinplace pile, and described castinplace pile is pulverized-coal-ash pile.Pulverized-coal-ash pile and liquefying soil contact surface, flyash penetrates in liquefying soil.The utility model injects the pulverized-coal-ash pile being mixed with 1% ~ 3% activating agent in liquefaction earth by pressure, pulverized-coal-ash pile is at the effect generation chemical reaction of activating agent, impel flyash and the surrounding soil consolidation of pulverized-coal-ash pile, pore water can be made to overflow simultaneously, improve the shear strength of the soil body, eliminate liquefaction characteristics.This Ash Foundation not only can reach the object of eliminating liquefaction but also can improve holds ground base load power.

Description

Ash Foundation in a kind of liquefying soil

Technical field

The utility model relates to a kind of liquefied foundation, specifically refers to the Ash Foundation in a kind of liquefying soil.

Background technology

During earthquake, liquefying soil is under the effect of earthquake, and its granulated aggregate produces plastic strain, and volume reduces.Because earthquake motion ringing speed is much larger than the discharge rate of liquefying soil, therefore in moment of geological process, liquefying soil pore water has little time to discharge, now pore water pressure rises rapidly, the effective stress in soil particle is caused to reduce rapidly, the soil body is tending towards softening, and when the effective stress of soil equals zero, the total stress of upper overburden layer is all born by pore water.Under the ringing of earthquake motion, soil body particle is suspended in pore water, loses its shear strength completely, causes foundation soil to lose efficacy and occurs sandblasting preventing water phenomenon, building sinks, tilts or cracking, the safety of impact building.Need to process liquefying soil for this reason, eliminate its liquefaction property, conventional punching of shaking in engineering, arrange ooze, the method liquefied foundation processing such as strong rammer, although the respond well restriction all having applicable elements.

Utility model content

For deficiency of the prior art, the utility model proposes a kind of raising and hold Ash Foundation in the liquefying soil of ground base load power.

To achieve these goals, the technical solution adopted in the utility model is: the Ash Foundation in a kind of liquefying soil, comprises castinplace pile, and described castinplace pile is pulverized-coal-ash pile.

Described pulverized-coal-ash pile and liquefying soil contact surface, flyash penetrates in liquefying soil.

Described pulverized-coal-ash pile top is the thick hardcore bed of 200-400mm.

Thick 300 mm of described hardcore bed.

The utility model is inserted the pulverized-coal-ash pile being mixed with 1% ~ 3% activating agent in liquefaction earth by pressure, pulverized-coal-ash pile is at the effect generation chemical reaction of activating agent, impel flyash and the surrounding soil consolidation of pulverized-coal-ash pile, pore water can be made to overflow simultaneously, improve the shear strength of the soil body, eliminate liquefaction characteristics.This Ash Foundation not only can reach the object of eliminating liquefaction but also can improve holds ground base load power.

Accompanying drawing explanation

Fig. 1 is the layout schematic diagram of flyash slip casting point;

Fig. 2 is the longitudinal sectional drawing of flyash slip casting method liquefied foundation processing.

Reference numeral: 1, pulverized-coal-ash pile; 2, hardcore bed.

Detailed description of the invention

As depicted in figs. 1 and 2, the Ash Foundation in a kind of liquefying soil, comprises castinplace pile, and described castinplace pile is pulverized-coal-ash pile 1.Pulverized-coal-ash pile 1 and liquefying soil contact surface, flyash penetrates in liquefying soil.Pulverized-coal-ash pile 1 top is thick 200-400mm hardcore bed 2.Thick 300 mm of hardcore bed 2.

Ground first calculates before slip casting, determines the distribution of stake holes point position and the degree of depth of pulverized-coal-ash pile 1; Then in each stake holes, insert the pulverized-coal-ash pile 1 being mixed with 1% ~ 3% activating agent, pulverized-coal-ash pile 1, at the effect generation chemical reaction of activating agent, impels flyash and surrounding soil consolidation, pore water can be made to overflow simultaneously, improve the shear strength of the soil body, eliminate liquefaction characteristics; Pulverized-coal-ash pile 1 arranges the thick hardcore bed 2 of 300mm at ground top after inserting, and this thick hardcore bed 2 plays horizontal drainage effect, is conducive to the rapidly solidified of soil layer after constructing, more can plays obvious stress spread effect, reduces the annex stress of foundation bottom soil layer.

Claims (1)

1. the Ash Foundation in liquefying soil, comprises castinplace pile, it is characterized in that: described castinplace pile is pulverized-coal-ash pile, described pulverized-coal-ash pile and liquefying soil contact surface, and flyash penetrates in liquefying soil, and pulverized-coal-ash pile top is the thick hardcore bed of 300mm.