含AMPS-NNDMA/AM二元聚合物顶管润滑泥浆的减阻和流变性能研究

Study on Drag Reduction and Rheological Properties of Pipe-jacking Slurry Containing AMPS-NNDMA/AM Binary Polymer

摘要:

顶管泥浆相当于顶管施工的“血液”，其性能的好坏决定着工程能否顺利进行。为此研究了5种聚合物，包括WRA-97、WRA-70、 WRA-61（AMPS-NNDMA聚合物） 和WRA-104、WRA-116（AMPS-AM聚合物）掺入后对顶管泥浆减阻性能和流变性能的影响。结果表明：WRA聚合物泥浆的基本性能、减阻性能和流变性能均与聚合物类型、相对分子质量及其结构相关；AMPS-NNDMA聚合物的抗滤失性能优于AMPS-AM聚合物，而AMPS-AM聚合物泥浆比AMPS-NNDMA聚合物泥浆具有更优良的润滑减阻性能；WRA聚合物泥浆具有良好的触变性和剪切变稀性，其流变曲线可以采用幂律流体的本构方程来描述，其流变参数的变化规律与漏斗黏度的变化规律一致。

Abstract:

The pipe-jacking slurry is equal to the “blood” of pipe-jacking construction. Its properties determine whether the project can proceed smoothly. Therefore, the effects of five polymers including WRA-97, WRA-70, WRA-61(AMPS-NNDMA polymer) and WRA-104, WRA-116(AMPS-AM polymer) on drag reduction and rheological properties of pipe-jacking slurry after added are studied. The result shows that the basic performance, drag reduction property and rheological property of WRA-polymer slurry are related to the polymer type, relative molecular mass and its structure. The anti-filtration property of AMPS-NNDMA polymer is better than AMPS-AM polymer, but AMPS-AM polymer slurry has better lubrication performance than AMPS-NNDMA polymer slurry. The WRA polymer slurry has the good thixotropy and shear thinning property. Its rheological curve can be described by the constitutive equation of power-law fluid. The change law of its rheological parameters is agreed with the change law of funnel viscosity.