Equipment and method for measuring mesoscopic strain of nanogel cementation regions of sand grains

The invention discloses equipment and a method for measuring mesoscopic strain of nanogel cementation regions of sand grains. The equipment comprises a load applying device, a cementation region forming device, a mark point spraying device, a particle image velocimeter and a data collection and control system, wherein the load applying device comprises a base, a force applying rod and a linear ultrasonic motor, the cementation region forming device comprises two hemispheric particles as well as a water pump, an organic glass sleeve with the semicircular section, a slim injection pipe and a nano-silicon sol storage container which are in sequential connection, the particle image velocimeter comprises a digital camera for PIV (particle image velocimetry) and a light source, and the data collection and control system is connected with the load applying device and the particle image velocimeter. The equipment has the advantages that the nanogel cementation region forming device applicable to non-contact strain me