为提高酶诱导碳酸盐沉淀（enzyme-inducedcarbonate precipitation，简称EICP）技术固化风积沙效果，将EICP技术与聚丙烯酰胺（polyacrylamide，简称PAM）联合用于沙土固化。首先研究了PAM对脲酶活性及碳酸钙生成量的影响，然后通过固沙试验确定了PAM的适宜添加量，采用风洞试验对比了EICP和EICP+PAM固化风积沙的抗风蚀能力，并探究了PAM对EICP固沙保水性和吸水性影响。结果表明：研究浓度范围内（0～1 g/L）PAM对脲酶活性及碳酸钙产量影响较小。随PAM浓度增大，沙样的表面强度及硬壳层厚度均呈先增大后减小的趋势，PAM浓度为0.6 g/L时，沙样表面强度及硬壳层厚度最大，因此，将0.6 g/L作为PAM的适宜浓度。相比EICP固化沙土，EICP+PAM固化沙土的抗风蚀能力增强，30 m/s风速下EICP+PAM固化沙的风蚀速率仅为13.28 g/(m2·min)。此外，添加PAM后固化沙土表面硬壳的保水性及长期稳定性更好，表明PAM与EICP技术结合可有效提高固化风积沙性能。To enhance the effectiveness of the enzyme-inducedcarbonate precipitation (EICP) technique in solidifying aeolian sand

EICP wascombined with polyacrylamide (PAM). Initially

the effects of PAM on ureaseactivity and calcium carbonate production were examined

followed bydetermining the optimal PAM concentration through sand solidification tests. A wind tunnel test compared the wind erosion resistance of aeolian sandsolidified by EICP and EICP+PAM

while the impacts of PAM on EICP waterretention and absorption were also assessed. The results show that PAM has aminimal effect on urease activity and calcium carbonate production within thestudied concentration range (0−1 g/L). As PAM concentration increases

thesurface strength and crust thickness of sand specimens initially rise and thendecline. When the PAM concentration is 0.6 g/L

both parameters reach theirmaximum

identifying 0.6 g/L as the optimal PAM concentration. The wind erosionresistance of sand solidified by EICP+PAM is superior to that of sandsolidified by EICP alone. The wind erosion rate of EICP+PAM solidified sand ismerely 13.28 g/(m2·min) at a wind speed of 30 m/s. Additionally

thesurface crust of PAM-enhanced solidified sand provides improved water retentionand long-term stability

suggesting that combining PAM with EICP technologyeffectively enhances the performance of solidified aeolian sand.