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采用钻孔后取出的废弃泥浆与水泥固化剂、掺合物粉煤灰在孔外进行搅拌形成的水泥土具有强度高、成本低和环保等特点,其工法应用日渐广泛。结合钻孔后注浆工艺,对由粉质粘土泥浆、水泥、粉煤灰及水组成的高性能水泥土抽样进行了无侧限抗压强度试验,并通过支持向量机(SVM)对试验样本及强度进行学习,得出了相应的回归模型,以期对该类型水泥土进行强度预测,达到提供最优配合比的目的。研究认为:该类型水泥土彻底改变了传统的水泥土的成型工艺,在龄期为28d的情况下,设计强度等级多数能达到1·5MPa以上,在泥浆比重≥1·2且水泥土比重≥1·35时,均能达到上述强度并满足工程要求。
The cement mud, which is formed by mixing the waste mud removed after drilling and the cement curing agent and the fly ash of the admixture outside the hole, has the characteristics of high strength, low cost and environmental protection, and the method is widely used. Combining with the grouting process after drilling, unconfined compressive strength tests were conducted on samples of high-performance cement soil composed of silty clay slurry, cement, fly ash and water. The test samples were obtained by support vector machine (SVM) And the strength of the study, derived the corresponding regression model, in order to predict the strength of this type of cement soil, to achieve the purpose of providing the best mix. The study shows that this type of cement soil completely changed the traditional cement soil forming process. When the age was 28d, most of the design strength grades could reach more than 1.5MPa. When the specific gravity of cement ≥1.2 and the concrete weight ≥ 1 · 35, can achieve the above-mentioned strength and meet the engineering requirements.