植物纤维加筋固化土抗压强度和渗透试验研究

EXPERIMENTAL STUDY ON COMPRESSIVE STRENGTH AND PERMEABILITY OF SOIL SOLIDIFIED WITH COCONUT-FIBER AND DOUBLE POLYETHYLENE MATERIAL

为了研究椰丝纤维和双聚高分子材料加固粉砂土的效果和机制,本文采用正交试验方法,通过掺加双聚高分子材料和椰丝纤维,针对影响加筋固化土的力学性能和渗透性的因素(椰丝纤维掺量、椰丝纤维长度和双聚材料掺量),进行无侧限抗压强度试验和渗透试验等分析研究。研究结果表明:在粉砂土中添加双聚材料固化剂和椰丝纤维,提高了土体的无侧限抗压强度和降低了土体的渗透性。椰丝纤维含量和双聚材料掺量对试样的无侧限抗压强度影响非常显著,椰丝纤维长度对试样无侧限抗压强度的影响显著。椰丝纤维含量和双聚材料掺量对试样渗透系数的影响显著,椰丝纤维长度对渗透系数的影响不显著。当纤维掺量为0.9%,双聚材料掺量为0.375%时,试样的无侧限抗压强度最大。纤维掺量为0.9%,双聚材料掺量为0.325%时,试样的渗透系数最小。

This paper studies the effects and mechanical properties of soil reinforced with coconut fiber and double polyethylene polymer. The examined factors include the content of coconut fiber, the length of coconut fiber, and the content of double polyethylene material. They can influence stabilized soil mechanical properties and permeability. We use the orthogonal experiment method to conduct unconfined compressive strength tests and permeability tests by adding coconut fiber and double polyethylene polymer. Test results show that the unconfined compressive strength improves and the permeability decreases after coconut fiber and double polyethylene material are added into the soil. Compared with the obvious impact of coconut fiber length on the unconfined compressive strength, coconut fiber content and double polyethylene material content have significant impact. Though coconut fiber length has no significant impact on the permeability coefficient, the influence of coconut fiber content and double polyethylene material content is clear. When fiber contents come to 0. 9 % and double polyethylene material contents reach 0. 375%,the soil sample is of the largest unconfined compressive strength. When fiber contents arrive 0. 9%, and double polyethylene material content 0. 325%, the minimum permeability coefficient is observed.