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淤泥固化知多少？

2020-11-24

青州永生環(huán)保清淤裝備有限公司

土壤固化處理具有悠久的歷史，早在幾千年前，人類就懂得用石灰和火山灰來固化土壤，以適應生產(chǎn)活動的需要。但是將其作為一門學科來研究，卻僅有百余年的歷史。淤泥固化處理是指通過在淤泥中加入一定量的外摻劑，改善淤泥土的物理力學性能，以滿足不同工程
Soil solidification treatment has a long history. As early as thousands of years ago, people knew how to use lime and volcanic ash to solidify soil to meet the needs of production activities. However, it has only a history of more than a hundred years to study it as a discipline. Silt solidification treatment is to improve the physical and mechanical properties of silt by adding a certain amount of admixture to the silt to meet the needs of different projects.
需要的一門技術(shù)，屬土壤固化處理范疇。淤泥固化處理以其工藝簡單、施工效率高、價格合理等優(yōu)點，使其在實踐中得到廣泛的應用。淤泥中加入固化材料后，其物理性能將發(fā)生改變，這是因為: 淤泥與固化材料比重不同，有的固化材料比重大于淤泥，有的則相反，兩者混合后，改變了淤泥比重；固化材料的加入往往消耗部分水分及有機質(zhì)，生成新的物質(zhì)，從而改變淤泥含水率、液塑限及流變性。) 強度。淤泥固化土作為工程填料使用，強度是其主要的指標，現(xiàn)階段強度研究主要集中在無側(cè)限抗壓強度及抗剪強度等參數(shù)。由于淤泥具有高含水率、富含有機質(zhì)等特點，因此對淤泥固化土的強度影響因素的研究，主要集中在初始含水率、有機質(zhì)、固化材料摻加量等方面。初始含水率較大，淤泥固化土強度降低；有機質(zhì)大，減小固化土強度，甚至使固化材料失效; 而固化材料的摻入量也是決定性因素，固化材料摻加量不足，固化土無強度，量過大，多余部分則失去作用。變形。淤泥固化土的變形包括受力變形和環(huán)境變化引起的變形。受力變形包括無側(cè)限抗壓強度的破壞應變，三軸試驗中不同圍壓下固化土的軸向應變以及構(gòu)件的拉伸變形; 環(huán)境變化引起的變形包括不同齡期、不同條件下的體積變形等。
The technology needed belongs to the field of soil solidification treatment. Silt solidification treatment is widely used in practice because of its simple technology, high construction efficiency and reasonable price. When solidified material is added to sludge, its physical properties will change, because: the proportion of sludge and solidified material is different, some solidified material proportion is larger than that of sludge, and some contrary, the proportion of sludge is changed after mixing the two materials; the addition of solidified material often consumes part of water and organic matter to produce new substances, thus changing the moisture content, liquid plastic limit and rheological properties of sludge. 。 Strength. The strength of sludge solidified soil is the most important index when it is used as engineering filling. At present, the strength research mainly focuses on unconfined compressive strength and shear strength. Because of the characteristics of high water content and rich organic matter, the research on the factors influencing the strength of sludge solidified soil mainly focuses on the initial water content, organic matter and the amount of solidified materials. The initial moisture content is higher, the strength of sludge solidified soil decreases; the organic matter is larger, which reduces the strength of solidified soil, even makes the solidified material invalid; and the amount of solidified material is also the decisive factor. The amount of solidified material is insufficient, the solidified soil has no strength, the amount is too large, and the surplus part loses its function. Deformation. Deformation of silt solidified soil includes deformation caused by stress and environmental change. The mechanical deformation includes the failure strain of unconfined compressive strength, the axial strain of solidified soil under different confining pressures and the tensile deformation of components in triaxial tests, and the deformation caused by environmental changes includes the volume deformation at different ages and under different conditions.
淤泥固化土作為各類工程的承載基礎或砌筑材料，其耐久性是必須考慮的因素。因其屬親水性膠凝材料，受水影響大，因此應考慮水對耐久性的影響，包括抗?jié)B性、抗凍性以及特殊條件下的抗沖刷性、耐腐蝕性等。淤泥固化土抗?jié)B性往往較好，而抗凍性則較差。在影響淤泥固化土力學性能的因素中，往往對耐久性也有影響，力學性質(zhì)好，耐久性也
As the bearing foundation or masonry material of various projects, the durability of mud solidified soil is a factor that must be considered. Because it is a kind of hydrophilic cementitious material and is greatly affected by water, the influence of water on durability should be considered, including impermeability, frost resistance, erosion resistance and corrosion resistance under special conditions. The seepage resistance of mud solidified soil is usually better, but the frost resistance is worse. Among the factors affecting the mechanical properties of sludge solidified soil, the durability is often also affected. The mechanical properties are good and the durability is also good.