A method for testing the water discharge of a hidden pipe

Abstract

The invention discloses an underground pipe water discharge testing method. The method solves the problems in the prior art that test results are inconsistent with actual results of the underground pipe in the field due to the fact that during underground pipe water discharge testing, few factors are taken into account, and influence of porosity of a soil structure on the seepage rate of the underground pipe during test is not really reflected. The method provides a scientific basis for selecting suitable pipe diameter, perforation rate, burial depth, spacing and coating materials for actual layout of underground pipe. According to the technical scheme, the underground pipe water discharge testing method comprises the following steps that an underground testing device is arranged, the testing device is filled with soil and the relative error between the porosity of a soil sample in the testing device and that of a field soil sample is within the set range; different test schemes are designed for each influence factor x of water discharge of the underground pipe; according to observation data, a correlation formula between the water discharge of the underground pipe and influencing factors thereof is established; and the water discharge of the underground pipe is adopted as the maximum main target, the allowable budget investment and the allowable sediment concentration are adopted as the constraint conditions, the value of each influencing factor x is comprehensively optimized.

Description

technical field [0001] The invention relates to the field of drainage of hidden pipes, in particular to a method for testing the drainage of dark pipes. Background technique [0002] Underground pipe drainage is a drainage technical measure that uses underground pipes to remove excess water from field soil. The excess water in the soil can be drained from the joint of the hidden pipe or the micropores of the pipe wall to infiltrate into the pipe, so as to control the groundwater level, adjust the soil moisture, and improve the physical and chemical properties of the soil. Underground pipe drainage has the advantages of facilitating mechanized field operations, saving land and improving land utilization, but the one-time investment is relatively large and the construction technology requirements are relatively high. [0003] The underground pipe drainage test can reveal the influence of different hidden pipe diameters, buried depths, perforation ratios, spacing and other fac...

AI Technical Summary

Problems solved by technology

[0005] Whether it is an indoor test or an on-site underground pipe drainage test, due to artificial disturbance of the soil and infiltration during the test process, fine particles and soluble impurities enter the underground pipe with the water flow, destroying the soil structure on site, and the existing test structure is simple. , but it does not really reflect the influence of factors such as soil structure and porosity on the drainage performance of the concealed pipe. In addition, the test needs to carry out several different plans for the laying of the concealed pipe, which will also cause changes in the soil structure and porosity, resulting in The test results are inconsistent with the actual drainage results of the field soil underground pipe. The traditional test did not truly reflect the impact of these changes on the drainage performance of the underground pipe.

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