Analysis and application research on the squeezing effect of high-pressure jet grouting
The squeezing effect of high-pressure jet grouting can cause damage to existing buildings in the surrounding area,and control-ling and utilizing the squeezing effect of high-pressure jet grouting is of great significance.Therefor,based on engineering examples,the analytical solutions for the plastic zone radius,radial stress increment,and excess pore water pressure increment formed by high-pressure jet grouting compression effect during the correction and reinforcement process of bridge foundation piles were calculated,and the variation law of high-pressure jet grouting compression effect was studied.The calculation results show that the plastic zone radius of high-pressure jet grouting increases linearly with the displacement rate of the grouting body area;In the range of compression elastic zone,the radial stress increment and the excess pore water pressure increment gradually decrease with the increase of horizontal distance from the high-pressure injection center point,and the reduction rate is first fast and then slow;The radial stress increment and excess pore water pressure incre-ment of the soil layer both exhibit a linear growth relationship with the area replacement rate;The squeezing effect of high-pressure jet grouting is mainly concentrated within 10 times the design jet radius.In addition,the theoretical analysis results were used to guide the de-sign and construction of bridge foundation pile correction engineering,achieving good results.
High pressure injectionSqueezing effectRadial stressSuperpore water pressureBridge foundation pilesCorrection and re-inforcement
万方数据
维普
