Study On Soil-fixation Mechanism And Durability Of Ecological Soil Stabilizer In Fujian Province

There are some problems in traditional slope protection,such as the combination of vegetation and effect of the environment.The ecological soil stabilizer can not only prevent and control soil erosion of shallow slopes but also play a role in vegetation restoration without pollution.In consideration of special climatic conditions,such as high temperature,high humidity,high radiation and local short-term freeze-thaw cycles in Fujian province,the applicability,studies are insufficient about curing mechanism and durability of various curing agents.In this paper,the soil-fixation mechanism,durability and construction effect of curing agent have been studied by means of indoor macro test,microscopic test and field test.The main conclusions are as follows:1.The shear strength,shear strength index and compressive strength of the four cured soil increased with the increase of the content and curing age,the formation of compressive strength mainly concentrated in the early stage,the strength reached 70%,80%and 90%when the curing age of 3 days,7 days and 14 days,respectively.2.The four solidified soil have a greater affected on strength by the 1 days of UV aging,the freeze-thaw cycles of 3 times,and the dry-wet cycles for the first time,and in the UV aging 3-6 days,12 times for freeze-thaw cycle,dry and wet cycle for 5 times strength tends to be stable.The water stability of the solidified soil is improved,W-OH,PAM improve more.3.There are no new functional groups and no new minerals in the four solidified soil samples;W-OH,PAM,JCDK-1 curing agents have good thermal stability while the thermal stability of EN-1 curing agent is poor;And the specific surface area of the solidified soil decreases with the increase of the content of the curing agents;The adhesion effect of W-OH and PAM solidified soil is obvious,and the compactness of JCDK-1 solidified soil is enhanced,the agglomerate structure of EN-1 solidified soil is obvious,which makes the soil agglomerate into the whole structure.4.The UV aging has the greatest influence on the micro structure of W-OH and PAM solidified soil and it also destroys the filamentous bonding between soil particles whose effect on JCDK-1 solidified soil is less;The freeze-thaw cycles have little effect on the microstructure of the solidified soil.The dry-wet cycles have a great influence on the microstructure,and later influence is small;The dry-wet cycles have a great influence on the microstructure of EN-1 solidified soil,but has little effect on the microstructure of W-OH,PAM and JCDK-1 solidified soil.5.The four solidified soil the UV aging resistance is as follows:JCDK-1,EN-1,PAM,W-OH;freeze-thaw cycles resistance is as follows:EN-1,W-OH,PAM,JCDK-1;the resistance of dry-wet cycles and the water stability is as follows:W-OH,PAM,JCDK-1,EN-1.6.The field tests have showed that the experimental study on vegetation growth and scouring test of four cured slope,JCDK-1,PAM curing slope of the vegetation growth and erosion resistance is better.In all aspects,the optimum spraying concentration(water volume ratio)of W-OH curing agent is 3%,the best dosages(soil mass ratio)of PAM,JCDK-1 and EN-1 curing agents are 0.3%,0.3%and 0.15%respectively.And the integrated solid soil performance of JCDK-1 and PAM curing agent is better.