CN-121977934-A - Test system and method for simulating whole disaster-causing process of urban road collapse

CN121977934ACN 121977934 ACN121977934 ACN 121977934ACN-121977934-A

Abstract

The invention discloses a test system and a method for simulating the whole disaster-causing process of urban road collapse, the system comprises a test box body, a plurality of box body preformed holes are formed in the test box body, the test box body is arranged between two counterforce walls to form a test cavity, soil bodies are filled in the test cavity in a layered mode and road structure layers for embedding test pipelines are paved in the test cavity, the counterforce walls are connected with counterforce frame components erected above the test box body, a hydraulic matrix composed of a plurality of hydraulic devices is further arranged between the test box body and the counterforce walls, the counterforce frame components are movably connected with wheel grinding devices for simulating dynamic traffic loads, the bottoms of the wheel grinding devices are positioned in the test box body, spraying devices connected with water tanks are arranged on the counterforce frame components, and water delivery devices connected with the water tanks are further arranged in the test pipelines. The invention can perform high-precision real-time monitoring simulation of the whole process, multidimensional and multi-factor coupling on key parameters in the whole process of road collapse.

Inventors

YANG QIAN
LUO LI
JIANG SIJING
LI RUISONG
BAI SHIHONG
WANG XIANZHI
ZHAO ZEMING
CHEN PENG
JIN YONGQIANG
DING YIWEI

Assignees

中国五冶集团有限公司

Dates

Publication Date: 20260505
Application Date: 20260318

Claims (10)

1. The utility model provides a simulation urban road subsides and causes test system of disaster overall process, its characterized in that, includes the test box, set up a plurality of box preformed holes on the test box, the test box sets up between two counter-force walls to form the test cavity, the layering is filled the soil body in the test cavity and is laid the road structure layer that is used for imbedding test pipeline, the counter-force wall is connected with and erects the reaction frame subassembly of test box top, the test box with still be provided with the hydraulic matrix that comprises a plurality of hydraulic means between the counter-force wall, reaction frame subassembly swing joint has the wheel grinding device that is used for simulating dynamic traffic load, the bottom of wheel grinding device is located in the test box, install the spray set who is connected with the water tank on the reaction frame subassembly, still be provided with in the test pipeline with the water delivery device who is connected with controlling means electricity is provided with the monitoring element that is connected in the test box, hydraulic means the wheel grinding device, spray set and water delivery device all are connected with controlling means electricity.
2. The system according to claim 1, wherein the reaction frame assembly comprises a transverse reaction frame, a vertical reaction frame and a longitudinal reaction frame, wherein the vertical reaction frame and the reaction wall are connected with each other, and the vertical reaction frame and the longitudinal reaction frame are connected with each other.
3. The test system for simulating the full process of disaster caused by urban road collapse according to claim 2, wherein said wheel rolling device is mounted on said longitudinal reaction frame, and said spraying device is mounted on said transverse reaction frame.
4. The test system for simulating the whole disaster-causing process of urban road collapse according to claim 1, wherein the hydraulic device comprises a hydraulic bottom plate connected with the counter-force wall, a hydraulic cylinder is arranged on the hydraulic bottom plate and connected with a hydraulic rod, one end of the hydraulic rod, which is far away from the hydraulic cylinder, is provided with a hydraulic top plate connected with a rubber plate, the rubber plate is fixed on the test box body, and the hydraulic cylinder is electrically connected with the control device through a hydraulic control line so as to simulate soil body stress change.
5. A test system for simulating the overall process of a disaster caused by a collapse of an urban road according to claim 3, wherein the wheel rolling device comprises a sector wheel rolling and a driving assembly connected with the sector wheel rolling, and the driving assembly is connected with the longitudinal reaction frame.
6. The test system for simulating the full process of disaster caused by urban road collapse according to claim 5, wherein the driving assembly comprises a single-rail tooth socket connected with the longitudinal reaction frame, a plurality of driving gears are arranged in the single-rail tooth socket and connected with a driving motor, the driving motor is connected with a pressurizing cylinder, the pressurizing cylinder is connected with the sector wheel mill through a movable rotating shaft, and the driving assembly is electrically connected with the control device through a wheel mill control line.
7. The system according to claim 1, wherein the water delivery device comprises a water delivery tube bundle penetrating through the preformed hole of the box body, the water delivery tube bundle is provided with a plurality of water delivery pipes communicated with the pipe wall of the test pipe, and the plurality of water delivery pipes are uniformly distributed at intervals along the circumferential direction of the test pipe.
8. The test system for simulating the whole disaster-causing process of urban road collapse according to claim 1, wherein the monitoring element comprises a plurality of pressure sensors and a laser scanning probe, the pressure sensors are respectively buried in soil and test pipelines, and the laser scanning probe is arranged on the test pipelines.
9. The test system for simulating the whole disaster-causing process of urban road collapse according to claim 8, wherein a plurality of conductive optical fiber bundles penetrating through the reserved holes of the box body are further arranged in the test pipeline, the conductive optical fiber bundles are uniformly arranged at intervals along the circumferential direction of the test pipeline, one end of each conductive optical fiber bundle penetrates through the test pipeline and is connected with the laser scanning probe, and the other end of each conductive optical fiber bundle is connected with the control device.
10. A test method for simulating the whole disaster-causing process of urban road collapse based on the test system according to any one of claims 1 to 9, characterized by comprising the following steps: A model building step, namely filling soil bodies in layers in a test box body, simulating actual soil layer distribution, paving road structure layers, burying and fixing a test pipeline in the test box body, installing a pressure sensor and a laser scanning probe, and connecting the pressure sensor and the laser scanning probe with a control device through a box body reserved hole; A parameter setting step; a simulation test step, namely starting a spraying device to simulate rainfall, simulating construction disturbance by a hydraulic device, simulating traffic dynamic load by a wheel grinding device, and simulating pipeline leakage by a water delivery device; And a data collection step, wherein the pressure sensor and the laser scanning probe collect soil mass data in the simulation test process in real time and transmit the soil mass data to the control device for storage through the conductive optical fiber bundle.

Description

Test system and method for simulating whole disaster-causing process of urban road collapse Technical Field The invention belongs to the technical field of urban road tests, and particularly relates to a test system and a test method for simulating the whole disaster-causing process of urban road collapse. Background With the acceleration of the global urbanization process, the development intensity of urban underground space is continuously improved, and urban road collapse has the characteristics of strong burstiness, high concealment, high harmfulness and the like, and becomes a ' urban disease ' problem threatening urban public safety and people's lives and properties, and the urban road collapse is a typical multi-element coupling disaster system formed by multiple factors such as geological-climate-human, wherein pipeline leakage, rainfall conditions, construction disturbance, traffic load, soil layer distribution and the like are the most main reasons for causing pavement collapse; At present, research on road collapse mainly relies on numerical simulation, field monitoring and small-scale physical model test, but the applicant finds that the current test system has the following defects: most of the existing test systems can only simulate road collapse under a single type or specific condition, and cannot fully restore the whole process from occurrence and development to disaster generation of urban road collapse, in particular to a collapse evolution mechanism under the coupling action of multiple factors; in the process of simulating collapse, the conventional device has insufficient control precision on key factors such as soil parameters, load conditions, hydrologic environment and the like, and is difficult to realize a fine and repeatable test process, so that the scientificity and reliability of test data are affected; The existing test system often lacks the capability of real-time and three-dimensional monitoring of key physical quantities such as deformation, stress distribution, crack development and the like in the soil body in the collapse process, so that the collapse mechanism is not well understood; The existing large-scale physical model test often needs complex equipment construction, a large amount of soil samples and long preparation time, has low test efficiency, and is not suitable for rapid and multi-working-condition comparison research; As in chinese patent No. CN118190644a, a static and dynamic test system for quantitative research of underground disease body of road is disclosed, in which many factors such as geological conditions, underground disease body type, scale, road surface structure type, and vehicle load form related to road collapse are simulated, but the horizontal loading component acts on the road surface structure, and the road surface structure mainly bears vehicle load in vertical direction, which is not in accordance with the actual situation of road collapse; As in the chinese patent No. 115184579a, a system and a method for testing the overall disaster-induced evolution of the hidden danger of caving in a hole are disclosed, in which a form control unit is used to realize the expansion and elimination of the preparation parts of the hole in the road, and simulate the disaster accident of caving in the road caused by the hidden danger of the hole in the road, but the function is single, the influence of the coupling effect of factors such as the load of the road surface on the subsidence of the road is not fully considered, and the overall disaster-induced process of the subsidence of the urban road cannot be restored; As in chinese patent No. CN115266725A, a system and a method for testing collapse caused by leakage of a buried pipeline are disclosed, which utilize a displacement ranging monitoring module, an image monitoring module and a pipeline leakage joint to simulate the development and deformation characteristics of the whole process of road collapse evolution caused by pipeline leakage disease, but have limited observation means and lack of real-time and three-dimensional monitoring capability on key physical quantities such as internal deformation of soil body and pipeline stress distribution in the collapse process; that is, the applicant found that, with respect to the current prior art, the following fundamental inadequacies exist: (1) The simulation process is one-sided, and lacks the full-process simulation capability, namely the existing device is mainly focused on a certain link (such as hole expansion, load damage or pipeline leakage) in a disaster chain, and cannot realize the continuity, the full-process and the integrated simulation from the initial formation of a road disease body to the final collapse of a road surface, so that the deviation from the actual situation is larger; (2) The load simulation distortion can not simulate the dynamic wheel rolling effect, wherein most experiments simulate the vehicle load by adopting static