High-efficiency pre-drilling pressure meter test apparatus and method for deep rock mass

A pressure meter test method comprising:

• forming a borehole;
• providing a pressure meter test apparatus, wherein
• the pressure meter test apparatus comprising a rigid drill pipe for receiving a fluid medium, the rigid drill pipe comprising a top end and a tail end opposite to the top end;
• a probe connecting with the tail end of the rigid drill pipe and communicating with the rigid drill pipe, the probe comprising a measuring chamber, the fluid medium is able to flow from the rigid drill pipe to the measuring chamber;
• a pressurizing device connecting to the top end of the rigid drill pipe and configured to apply pressure to the fluid medium to cause the measuring chamber a deformation;
• and
• a signal processing device being electrically connected with the probe processing device;
• putting the rigid drill pipe in the borehole to ensure the probe in a target stratum;
• injecting a fluid medium into the rigid drill pipe and the probe to generate an initial pressure of the pressure meter testing;
• switching on the pressurizing device to apply pressure on the fluid medium received in the rigid drill pipe and the probe, and the pressure transferred to the measuring chamber causes the measuring chamber to deform;
• and
• shutting the pressurizing device, exhausting the fluid medium in the rigid drill pipe and the probe and removing the rigid drill pipe and the probe from the borehole.