为研究分散剂溶液浸泡的泥饼处理方法的有效性以及刀盘泥饼的崩解特性，取深圳市轨道交通13号线留白区间软岩段破除下的原状泥饼制成尺寸不同的若干试样，利用自行改进的崩解仪，对不同试验条件下的泥饼试样进行室内崩解试验，分析分散剂溶液、溶液体积分数、泥饼尺寸、初始含水率、干湿循环等因素对泥饼崩解特性的影响规律。试验结果表明： 1）泥饼崩解现象主要经历崩解开始—崩解发展—崩解稳定3个阶段； 2）分散剂溶液对刀盘泥饼的作用影响存在适应性差异，且与溶液体积分数相关，崩解促进作用对应的溶液体积分数存在阈值； 3）泥饼形成规模与其分散处理难易程度直接相关； 4）初始含水率对刀盘泥饼的崩解特性影响显著，对于含水率较高的地层，建议结合现场应用效果，采取必要措施，将刀盘泥饼含水率降至5%及以下，以提高泥饼处理效率； 5）干湿循环会加速刀盘泥饼内部结构破坏，一般经历3次干湿循环作用，泥饼处理难度会有所降低。
To study the effectiveness of the treatment method of
soaking mud cake in a dispersant solution and the disintegration
characteristics of cutterhead mud cake, undisturbed mud cake from the soft rock
portion of the shield section of the Shenzhen railway transit line 13 is made
into several samples with different sizes. A laboratory disintegration test is
conducted on the mud cake samples under different test conditions using a self-improved
disintegrator. The influence of the dispersant solution, solution volume
fraction, mud cake site, initial water content, and dry-wet cycle on the disintegration characteristics of the mud cake is
analyzed. The test results show the following: (1) Mud cake disintegration
mainly goes through three stages, i.e., initiation, development, and
stabilization. (2) The effect of the dispersant solution on the mud cake is
adaptive in nature and is related to the concentration of the solution.
Furthermore, the concentration of the solution on the promotion of the
disintegration has a specific threshold. (3) The mud cake scale is related to
dispersant treatment. (4) The initial water content of the mud cake has a
significant influence on its disintegration characteristics. For mud cake
having high moisture content, it is suggested to take necessary measures to
reduce the initial water content to 5% or less according to the field
application effect. (5) Dry-wet cycle can accelerate
the destruction of the internal structure of the mud cake. The difficulty in
processing mud cake can be reduced after three iterations of the dry-wet cycle.
