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为正确理解固化疏浚泥的力学性质,通过对固化疏浚泥进行固结不排水静三轴压缩试验,研究了围压和固化剂掺量对固化疏浚泥的破坏形式、应力—应变关系及抗剪强度参数的影响。试验结果表明,随着固化剂掺量的增加,固化疏浚泥的应力—应变关系由应变硬化型变为应变软化型;破坏形式由塑性破坏向脆性破坏过渡,而围压对其破坏形式无影响;固化疏浚泥的强度和抗变形能力均随着围压和掺量的增加而增大,但当围压小于土体内结构体的屈服强度时,围压对抗变形能力的影响可忽略;粘聚力和内摩擦角随固化剂掺量分别呈对数型和线性规律增长。
In order to correctly understand the mechanical properties of solidified dredged mud, the static undrained static triaxial compression tests of solidified dredged mud were carried out to study the effects of confining pressure and curing agent on the types of the solidified dredged mud, the relationship between stress and strain and shear resistance Effect of intensity parameters. The experimental results show that with the increase of curing agent, the stress-strain relationship of solidified dredged mud changes from strain hardening to strain softening. The failure mode changes from plastic failure to brittle failure, while the confining pressure has no effect on the failure mode The strength and deformation resistance of cured dredged silt increase with the increase of confining pressure and content. However, when the confining pressure is less than the yield strength of the structure in the soil, the influence of confining pressure on deformation resistance can be ignored. The force and internal friction angle increased logarithmically and linearly with the amount of curing agent.