分层加固法对温州淤泥类渣土加固的现场试验研究

doi:10.13722/j.cnki.jrme. 2021.0248

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摘要为实现淤泥的资源化利用，采用固结–固化复合技术对试验场地淤泥展开分层加固法处理研究。试验时，采用固化技术对浅层淤泥进行固化加固，使之形成硬壳层；对深层淤泥，采用真空预压技术进行加固处理，以提高下卧层土体的承载力。现场试验结果表明，固化剂对浅层淤泥固化效果明显，当固化剂掺量为2%～8%时，浅层固化淤泥形成的硬壳层的承载力特征值为117～200 kPa，固化淤泥的变形模量在8.5～14.59 MPa。分层加固后的淤泥可用双层地基模型描述，对于双层地基而言，硬壳层具有一定的应力扩散作用，浅层固化淤泥的应力扩散角在8.28°～20.57°范围，可有效减小软弱下卧层的附加应力，双层地基整体的承载力特征值可达80～170 kPa。

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	骆嘉成1
	邵吉成2
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	袁波1
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	武亚军4

关键词 ：土力学, 淤泥, 固化, 固结, 硬壳层, 承载力特征值, 应力扩散

Abstract：To make the resource utilization of sludge，the layered reinforcement of sludge is conducted by consolidation-solidification composite technology to treat the sludge in the test site. During the test，the shallow sludge is reinforced by the solidification technology to forms a overlying crust. For the deep sludge，the vacuum preloading technology is used to reinforce it so as to improve the bearing capacity of the underlying stratum. Field test results show that the solidified agent has obvious solidified effect on the shallow sludge. When the solidified agent content is 2%–8%，the characteristic value of bearing capacity of overlying crust in shallow solidified sludge is 117–200 kPa. The deformation modulus of solidified sludge is between 8.5–14.59 MPa. The sludge after layered reinforcement can be described by a two-layer foundation model. For the two-layered foundation，the overlying crust has a certain stress diffusion effect. The stress diffusion angle of the shallow solidified sludge is between 8.28°–20.57°，which can effectively reduce the additional stress of the soft underlying stratum and the characteristic value of bearing capacity of the two-layered foundation can reach 80–170 kPa.

Key words： soil mechanics sludge consolidation solidification overlying crust characteristic value of bearing capacity stress diffusion

引用本文:

骆嘉成1，邵吉成2，3，袁波1，3，武亚军4. 分层加固法对温州淤泥类渣土加固的现场试验研究[J]. 岩石力学与工程学报, 2021, 40(S2): 3483-3492.
LUO Jiacheng1，SHAO Jicheng2，3，YUAN Bo1，3，WU Yajun4. Study of field test on reforcement of Wenzhou sludge by layered reinforcement method. , 2021, 40(S2): 3483-3492.

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http://rockmech.whrsm.ac.cn/CN/10.13722/j.cnki.jrme. 2021.0248 或 http://rockmech.whrsm.ac.cn/CN/Y2021/V40/IS2/3483

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