Drill-hole high-pressure water pump-in test loading system

Abstract

The invention discloses a drill-hole high-pressure water pump-in test loading system which comprises a test cavity and a water reservoir. The test cavity is formed in a test observation hole and is communicated with the water reservoir through a water inlet pipe, a high-pressure water pump unit is mounted on the water inlet pipe, and a water return pipe is communicated between the test cavity and the high-pressure water pump unit and provided with a pressure gauge. In the drill-hole high-pressure water pump-in test loading system, pipeline connection way is modified, the water return pipe is added to be assembled into double-pipeline connection way together with the water inlet pipe. Water pressure value of the test cavity is controlled by regulating pressure of the water return pipe and is free of affection from water flow state of the water inlet pipe when water pressure of the test cavity is tested by being connected with a pressure sensor, and head loss of pipelines is low; test value is smaller than practical pressure and is safer for drill-hole high-pressure water pump-in test reaching certain set pressure value.

Description

technical field [0001] The invention relates to a drilling high-pressure water pressure test loading system, which is suitable for the loading device of the rock mass in-situ high-pressure water pressure test system for underground projects in the fields of water conservancy and hydropower projects, petroleum and nuclear waste storage, and the like. Background technique [0002] The existing drilling high-pressure water test loading system is generally connected by a single pipeline. Although the single-pipe connection method is accurate and convenient for flow testing, there is a pressure difference between the data measured by the pressure sensor and the actual pressure of the test chamber. When considering the head loss of the pipeline caused by the flow state change of the inlet pipe, the pressure difference between the two is even greater. In particular, the actual pressure of the test chamber is less than the test value, and it is difficult to accurately calculate how ...

AI Technical Summary

Problems solved by technology

[0003] In order to overcome the high water pressure measured by the existing hole high-pressure water test loading system and the lack of safety, the present invention aims to provide a drilling high-pressure water test loading system, which can make the pressure of the pressure sensor test The value is closer to the actual pressure of the test chamber, providing accurate data for the water pressure test of the test chamber in the high-pressure water test of the underground engineering drilling in the fields of water conservancy and hydropower projects, petroleum and nuclear waste reserves, etc.

Images