Recently a new grout material called water inflow sealing (WIS) was invented for sealing water inflow in tunneling and underground constructions. In this study, a special experimental method called intubated counter grouting (ICG) was proposed to investigate the influence of water dispersion on the rheological properties of the grout during the grouting process, and to testify the sealing performance of the grout, such as instant gelling ability (IGA) and anti-dispersion ability (ADA). In the experiment, dispersion was restricted in the downstream of the channel with a high turbulence intensity. The influences of ADA and IGA were therefore decoupled and evaluated separately. Experimental results revealed two distinctive sealing mechanisms of WIS. For a low initial velocity of water, WIS turned the shear flow of water into an overall movement of a plug by absorbing water into the particles. For a high initial velocity and the situation that the particles reached the outlet before sufficiently expanding, WIS modified the rheology of the water in the channel and reduced its velocity till the static state. The distinctive feature of WIS brings a reformation on the sealing mechanism and provides an effective way to control water inflow with high pressure and velocity.

最近发明了一种称为水流入密封（WIS）的新型灌浆材料，用于密封隧道和地下建筑中的水流入。在这项研究中，提出了一种特殊的实验方法，称为插管反灌浆（ICG），以研究在灌浆过程中水分散对灌浆流变性能的影响，并验证灌浆的密封性能，例如瞬间胶凝。能力（IGA）和抗分散能力（ADA）。在实验中，分散被限制在具有高湍流强度的通道下游。因此，ADA 和 IGA 的影响被解耦并分别评估。实验结果揭示了 WIS 的两种独特的密封机制。对于水的初速度较低，WIS 通过将水吸收到颗粒中，将水的剪切流转变为塞子的整体运动。对于初速度较高且颗粒在充分膨胀之前到达出口的情况，WIS修改了通道中水的流变性并降低其速度直至静止状态。WIS的显着特点带来了密封机制的变革，为控制高压和流速进水提供了有效途径。