
大流量涌水下渗漏区的封堵治理需要灌浆材料具有良好的抗冲性能,其黏度一般较高,且能在短时间内快速凝固,时变特性显著。基于研发的HSC与HPSC两种新型灌浆材料,结合多物理场耦合的数值模拟方法,对多组工况下浆液的抗冲性能进行了定量分析。结果表明:HSC与HPSC灌浆材料具有凝结时间短、黏度增长迅速等特点,可用于大流量涌水下封堵治理;在小流量下(0.15 m
3
/(s·m))
HPSC与HSC浆液相比较为接近,抗冲性能差别不明显;在大流量(0.75 m
3
/(s·m))条件下,随着冲刷时间的延长,HPSC浆液相比降低较小,其与HSC及普通水泥浆液相比差逐渐增大,当冲刷360 s后浆液相比分别为18.9%、9.2%和8.0%。综上,HSC浆液能满足较小流量下抗冲要求,且可灌性较好;凝结时间较短、抗冲性更强的HPSC浆液可适用于大流量涌水渗漏区灌浆封堵中,但需注意其可灌性问题。
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