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提出海砂–海泥混合料作为海堤填筑材料。通过室内试验对不同掺合比的海砂海泥混合料的土体强度参数、压缩性能以及渗透性能进行对比分析,结果表示海砂–海泥按质量比1.5∶1掺合时,混合料的物理力学性质指标最接近工程要求。为改善混合料工程性质,采用水泥作为固化剂,通过一系列室内试验对掺合比1.5∶1的固化混合物的强度特性、压缩特性、渗透特性进行研究。结果表明:随着水泥掺量和龄期的增加,固化混合料的无侧限抗压强度、抗剪强度均有很大提高;存在7 d的早期强度;应力应变曲线在水泥掺量为8%与10%时具有有明显的峰值,且脆性破坏特征明显;渗透系数大幅度降低;水泥掺量为6%时,28 d龄期固化混合料便属于低压缩性土范畴。
Proposed sea sand - sea mud mixture as seawall filling material. Through laboratory experiments, the soil strength parameters, compressive properties and permeability of sea-mud mixtures with different blending ratios were compared and analyzed. The results showed that when the sea-mud ratio is 1.5:1, Physical and mechanical properties of the nearest project requirements indicators. In order to improve the engineering properties of the mixture, cement was used as the curing agent to study the strength, compression and infiltration properties of the cured mixture with the mixing ratio of 1.5: 1 through a series of laboratory tests. The results show that with the increase of cement content and age, the unconfined compressive strength and shear strength of the cured composites increase greatly, and the early strength of the cured composites exists for 7 days. % And 10%, respectively. The brittle failure characteristics were obvious and the permeability coefficient decreased significantly. When the cement content was 6%, the 28d aged mixture was in the category of low compressibility soil.