工程渣土配制喷播基质的配方筛选研究

Research on Matrix Formulation Screening of Spray Seeding Matrix Composed of Engineering Spoil

工程渣土与日俱增,利用工程渣土配制喷播基质运用于坡面绿化,可以实现工程渣土的资源化利用。用工程渣土改良的绿化用土作为试验材料,以坡面岩性(A)、粘结剂用量(B)、保水剂用量(C)作为试验因子,采用3因素2水平进行正交试验,通过研究不同坡面性质、不同粘结剂及保水剂用量对基质保水性及抗剪强度的影响,筛选出最优基质配方。结果表明,保水剂及粘结剂的添加提升了基质的持水能力,提高了基质的抗剪强度;3因素对基质保水性的影响程度大小顺序为:保水剂(C)>坡面岩性(A)>粘合剂(B),最优水平为A1B2C2;3因素对基质抗剪切能力的影响程度大小顺序为:粘合剂(B)>保水剂(C)>坡面岩性(A),最优水平为A2B2C2。通过综合分析保水性及抗剪强度得出最优的基质组合为A2B2C2,即坡面岩性为岩质坡面,粘合剂用量为60 gm-2,保水剂用量为50 gm-2。

The amount of engineering s poilgrew with each passing day.Engineering spoilt ofthe preparation forspray seeding matrix used in slope greening was used to realize the project of resource utilization. In order to select the optimum matrix formulation,this study designed an orthogonalexperiment of three factorsof slope lithology （A）, adhesive dosage （B）, and dosage of water retaining agent （C） at two levels and analyzed water retention and shear strength. The results showed thatwater retention agent and adhesiveagent promoted the water-holding capacity of the matrix, increased the shear strength of the matrix. The effects of 3 factors on the degree of water retention in the matrix decreasedin the order ofwater retaining agent （C）, slope lithology （A） and adhesive dosage （B）, and the optimal combination was A1B2C2. And those on the degree of matrix shear resistance were in the order of B 〉 C〉 A, and the optimal combination was A2B2C2. Through comprehensive analysis, the optimum matrix formulation in the experimental group was A2B2C2： that was rock slope, amount of adhesive at 60 gm-2 and dosage of water retaining agent at 50 gm-2.