Model Test Device for Ground Collapse from Pipeline Leakage
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Solution Overview
Problem
Current model test devices for ground collapse caused by pipeline leakage fail to simulate lateral groundwater replenishment, buried depth of groundwater head, coupling effects of multiple pipeline damages, and the influence of tunnel construction, leading to incomplete understanding of the disaster mechanism.
Innovation Solution
A model test device comprising a sand box, pipeline water circulation device, groundwater replenishment device, and water head measuring pipe group, which allows for simulation of lateral groundwater replenishment, adjustment of groundwater head, and study of multiple pipeline coupling effects and tunnel construction impacts on ground collapse.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If current physical model test device is used, then ground collapse mechanism can be studied, but lateral groundwater replenishment cannot be simulated
Solution Approach 1:
The test device divides the groundwater replenishment process into separate controllable components: infiltration replenishment through the road surface and lateral replenishment through the water-bearing stratum. This segmentation allows independent control and simulation of different replenishment pathways, enabling realistic representation of groundwater behavior while maintaining simulation accuracy.
Solution Approach 2:
The patent introduces an intermediary water-bearing stratum layer between the pipeline and the lower water source. This intermediary layer acts as a mediator that receives lateral replenishment water and transfers it to the pipeline, enabling the simulation of lateral groundwater replenishment mechanism that was previously impossible in model tests.
2Reliability
If single pipeline leakage is tested, then leakage mechanism can be observed, but coupling effect of multiple pipelines cannot be studied
Solution Approach 1:
The test device is designed with universal multi-functionality to accommodate different pipeline configurations. The sand box structure, pipeline mounting system, and groundwater replenishment装置 can simultaneously support single or multiple pipeline arrangements, allowing researchers to study both individual leakage mechanisms and coupling effects of multiple damaged pipelines within the same system.
3Ease of manufacture
If fixed groundwater head is used, then test conditions are simple, but influence of groundwater head depth cannot be quantified
Solution Approach 1:
The groundwater replenishment device is designed with dynamic adjustability, allowing the groundwater head depth to be varied during tests. The system can dynamically change water head levels while maintaining stable replenishment conditions, enabling quantitative study of groundwater head influence without sacrificing device simplicity or ease of operation.
4Ease of operation
If tunnel construction influence is excluded, then pipeline leakage test is straightforward, but tunnel construction impact cannot be evaluated
Solution Approach 1:
The test device allows preliminary setup of tunnel construction scenarios before conducting pipeline leakage tests. The tunnel structure can be pre-installed and positioned around the pipeline, enabling subsequent leakage tests to automatically include tunnel construction influences without complicating the operational procedures.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
Enables realistic simulation of ground collapse mechanisms, allowing for quantitative and qualitative analysis of groundwater head influence, pipeline coupling effects, and tunnel construction impacts, enhancing the understanding and prevention of ground collapse.
Implementation Method 1
The model test device can realize the simulation of lateral replenishment of a water-bearing stratum located at an underground soil layer of a high water-impermeability road surface
Implementation Method 2
it is impossible to quantitatively study influence of buried depth of groundwater head on a catastrophic process of ground collapse caused by pipeline leakage
Data Source
AI summary
The present invention discloses a model test device for ground collapse caused by pipeline leakage, including a sand box, a pipeline water circulation device, a groundwater replenishment device, a water storage tank and a water head measuring pipe set. The sand box includes a sand box body and a mesh sieve plate. There are two mesh sieve plate which divides an inner cavity of the sand box into a penetration cavity and a test cavity. Corresponding positions on the side wall of the test cavity are provided with a tunnel construction hole and a plurality of pipe mounting hole groups, respectively. One side wall of the test cavity is provided with a plurality of rows. There is a plurality of rows of water head measuring hole groups, and each row is provided with a plurality of the water head measuring hole groups.