Development And Geotechnical Mechanism Research Of The Photocuring Geomembrane

The existing geomembrane is susceptible to seam damage.This problem forces researchers and engineers to explore the progress of new materials.In this paper,the experiment uses a photocuring chain reaction,using acrylic monomers as the basic raw materials,1%to 5%photoinitiator as the reaction initiator,and 1%to 3%carbon as the reaction additive.A new type of impervious material for geotechnical mechanical properties——photocuring geomembrane,and then through tensile test,penetration test and interface direct shear test,the time required for the formation of photocuring geomembrane by photoinitiator content,tensile properties,permeability and interface shear were discussed.Influence of cutting performance,carbon content on the time required for the formation of photocuring geomembrane,tensile properties and permeability.The specific research work is as follows:1.In order to explore the effect of the photoinitiator content and carbon black powder content on the time required to form a photocuring geomembrane,this article records the time required for the formation of each ratio of photocuring geomembrane.The results show that when the content of carbon is constant,the use of a 2%photoinitiator will cause the shortest time for the formation of geomembrane.This phenomenon is most obvious in the 1%content of carbon.When the content of photoinitiator is fixed,the more carbon content,the longer the time required to generate photocuring geomembrane.2.In order to explore the effect of photoinitiator content and carbon content on the tensile properties of photocuring geomembrane,a universal tensile tester was used to perform tensile tests on each ratio of photocuring geomembrane.The results show that all proportions of photocuring geomembrane experienced four stages during the experimental process,namely the elastic deformation stage,the strain softening stage,the forced high elastic deformation stage and the fracture stage.Among them,the 2%photoinitiator content is the optimal ratio for the tensile properties of the photocuring geomembrane——it produces the largest stress peak and elastic modulus,while the elongation is the smallest.Compared to the effect of photoinitiator content on the tensile properties of photocuring geomembrane,the effect of carbon content is smaller.3.In order to explore the effect of photoinitiator content and carbon content on the permeability of photocuring geomembrane,this paper uses penetrometer to conduct permeation test for each proportion of photocuring geomembrane.The results show that the permeability coefficients of all proportions of photocuring geomembrane are in the range of 10^-9cm/s to 10^-10cm/s,and the geomembrane of 2%photoinitiator content has the best permeability coefficient.Compared to the effect of photoinitiator content on permeability,the effect of carbon content is smaller.4.In order to explore the effect of the photoinitiator content on the shear strength of the photocuring geomembrane-clay/sand interface,this article uses the ZJ strain-controlled direct shear apparatus to perform the direct shear test on each ratio of photocuring geomembrane.Results show that for the photocured geomembrane-clay interface,The interfacial cohesion of the geomembrane with 4%photoinitiator content is the largest,and the interface friction angle with the geomembrane content of 2%photoinitiator is the largest.In the anti-seepage liner system of the landfill,it is reasonable to choose a geomembrane with a 2%photoinitiator content.For the photocuring geomembrane-sand soil interface,the 2%photoinitiator geomembrane has the largest interface cohesion,and the 4%photoinitiator geomembrane has the largest interface friction angle.At the boundary between the drainage layer and the anti-seepage layer of the landfill,it is more reasonable to choose a 4%photoinitiator geomembrane;in the capping system,it is more reasonable to choose a 2%photoinitiator geomembrane.