A Study Of The Application Of The Pressure Connected Watertest In Some Engineering

Hydrogeological test is an important method in the water level geological survey,mainly used for hydrogeology parameters determination and understand themovement characteristics of groundwater, but the test have some limiting factor-lowpermeability areas due to Its weak permeability and the effect is not quite distinct inthe he connected test and pumping tests, so hydrogeological experiment research inthe low permeability area has a great significance to this region.This thesis is taking a waste disposal project as the research object, the extensivecollection of the research achievements of predecessors, combined with the fieldgeological survey and traditional hydrogeological test method, put forward theconcept of the pressure connected water test, this paper based on the statisticalanalysis of the test results, combined with the site conditions, discusses themechanism of test on hydraulic connectivity, influence factors, its applicability,analyzes its effect in practical application, and its existing problems.Through various methods of comprehensive analysis and get the followingresults and understandings:（1）The main strata of this disposal project reservoir is monoclinic, structure isrelatively simple, mainly composed of upper Silurian system Longmaxi Fm formationas5（S₁lm⁵） grayish green, grayish yellow shale, belongs to low permeabilityformation.（2）The results pressure water and hydraulic connectivity is mainly controlled bystructure, the groundwater contact between Pressure water holes and the observationhole decide the characteristics of the observation hole groundwater level change, anddevelopment characteristic of the joints and fissures between drilling determines thegroundwater connection strength, at the same time, the pressure of the pressure water hole also plays an important role in the test.（3）Through compare with the indoor experience,then set up conceptual model ofthe test, in the pressure water and hydraulic connectivity test the pressure weretransferred first and then water, but the change characteristics of water table wasuncertain, the contact strength between the Pressure water holes and the observationhole determines different variation characteristics of the water level.（4）Through the test determine the hydraulic connection characteristics of insideand outside disposed reservoir, to infer joints and fissures development characteristicof the disposal reservoir.（5）In the field test, due to test design and site restrictions, this trial has manydeficiencies need to be further improved, the test mechanism also need to make afurther study, and its applicability also need a further discussion.