CN105628893A - Model test device for simulating karst covering soil subsidence caused by subway vibration in karst region - Google Patents

Model test device for simulating karst covering soil subsidence caused by subway vibration in karst region Download PDF

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Publication number
CN105628893A
CN105628893A CN201610003141.8A CN201610003141A CN105628893A CN 105628893 A CN105628893 A CN 105628893A CN 201610003141 A CN201610003141 A CN 201610003141A CN 105628893 A CN105628893 A CN 105628893A
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China
Prior art keywords
karst
subway
simulation
limestone
funnel
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CN201610003141.8A
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CN105628893B (en
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王建秀
刘笑天
宋东升
殷尧
吴林波
邓沿生
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Tongji University
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Tongji University
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    • GPHYSICS
    • G01MEASURING; TESTING
    • G01NINVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N33/00Investigating or analysing materials by specific methods not covered by groups G01N1/00 - G01N31/00
    • G01N33/24Earth materials

Abstract

The invention relates to a mode test device for simulating karst covering soil subsidence caused by subway vibration in a karst region. The mode test device comprises a main body structure, an exciting system and a measuring system, wherein the main body structure comprises a model case, a subway simulation tunnel as well as limestone simulation materials, karst cavities, a karst funnel and karst covering soil which form an underground karst structure; the exciting structure comprises electromagnetic vibration exciters arranged inside the subway simulation tunnel and an exciting controller arranged outside the subway simulation tunnel; the measuring system comprises acceleration sensors, data acquisition instruments, soil mass weighing devices and a camera. The subway vibration is simulated by the exciting device in the subway simulation tunnel; the vibration acceleration at the karst funnel is measured by the acceleration sensors; the mass of falling soil mass is measured by using the soil mass weighing devices; the deformation process of the earth ground is recorded and observed by the camera. The mode test device disclosed by the invention is applied to the technical fields such as geological engineering and geotechnical engineering and can reveal the mechanism of initiating the karst covering soil subsidence by the subway vibration in the karst region and a surface subsidence rule.

Description

A kind of simulate the model test apparatus that karst area Subway Vibration causes karst earthing to subside
Technical field
The invention belongs to Geological Engineering, Geotechnical Engineering field, especially relate to a kind of simulate the model test apparatus that karst area Subway Vibration causes karst earthing to subside.
Background technology
In recent years, domestic existing more construction of subway is in shallow embedding Karst Area, and what train vibration was not only that karst earthing subsides causes the factor of collapsing, and its harm caused also is great. Subway line often builds the urban center territory at building dense, is the important component part of urban construction, and railcar vibration is likely to shallow embedding karst in city is produced extremely serious impact, directly affects track traffic safety along the line. At present, the research that Subway Vibration causes Rock And Soil deformation focuses primarily upon non-karst soil body tunnel, research work about karst region ferrum simulation tunnel focuses primarily upon the construction period, whether can subside because of vibration for shallow embedding karst earthing and potential collapsed mode and feature all recognize deep, correlational study is urgently carried out.
Summary of the invention
The invention aims to overcome above-mentioned technological deficiency and provide a kind of simulate the model test apparatus that karst area Subway Vibration causes karst earthing to subside.
The purpose of the present invention can be achieved through the following technical solutions:
A kind of simulate the model test apparatus that karst area Subway Vibration causes karst earthing to subside, it is characterised in that the present invention relates to content and include agent structure, excitation system and measurement system.
Described agent structure includes model casing, subway simulation tunnel and constitutes the limestone simulation material of underground karst structure, karst cavity, Karst funnel and karst earthing. Described model casing main body frame is welded by angle steel, and front panel is made up of lucite, and the back side, side, bottom panel are made up of steel plate; Described subway simulation tunnel is made up of Gypsum Fibrosum+glass fibre composite material; Described limestone simulation material is made up of Gypsum Fibrosum; Described karst cavity, Karst funnel will be piled up by limestone simulation material according to actual karst structure and form; Described karst earthing adopts the natural clay that karst area gathers.
Described excitation system includes the exciting controller of electromagnetic exciter and the outside arranged in subway simulation tunnel. Described electromagnetic exciter need to be installed in subway simulation tunnel according to underground railway track pattern, in order to simulate the vertical motion produced in subway train running and between track; Described exciting controller can control each electromagnetic exciter excited frequency, intensity and time.
Described measurement system includes acceleration transducer, data collecting instrument, soil body weighing device and video camera. Described acceleration transducer is arranged near Karst funnel in limestone simulation material, in order to measure near Karst funnel in limestone simulation material two to acceleration (horizontal acceleration, vertical acceleration); Described data collecting instrument is in order to gather, to record acceleration transducer measurement data; Described soil body weighing device is arranged on immediately below karst cavity bottom, Karst funnel, in order to measure the quality of the clay that drops from Karst funnel; Described video camera just to model casing front and with model casing keep be synchronized with the movement, in order to observed and recorded clay collapse process and clay areal deformation.
By exciting device simulation Subway Vibration in subway simulation tunnel, measure Karst funnel place acceleration of vibration by acceleration transducer, utilize soil body weighing device measurements to drop soil body quality, according to shooting record observation earth's surface deformation process. This method is applicable to Geological Engineering, Geotechnical Engineering field, it is possible to discloses karst area Subway Vibration and causes karst earthing to subside mechanism and surface subsidence rule.
To sum up, the inventive method principle is: adopt model test means, utilize the vertical motion produced in electromagnetic exciter simulation subway train running and between track, subsided overall process by karst earthing in acceleration transducer, weighing device and camera record vibration processes, disclose karst area Subway Vibration and cause karst earthing to subside mechanism and surface subsidence rule.
In being embodied as, need to first electromagnetic exciter be installed in subway simulation tunnel according to underground railway track pattern, limestone simulation material is loaded in model casing bottom, the subway simulation tunnel installing electromagnetic exciter is loaded model casing, continue to load limestone simulation material in model casing, compact siro spinning technology between limestone simulation material and subway simulation tunnel need to be ensured, the process of filling limestone simulation material arranges karst cavity and Karst funnel, wherein casting outlet and weighing device are arranged on karst cavity bottom, immediately below Karst funnel, limestone simulation material is installed acceleration transducer near Karst funnel, clay is filled above limestone simulation material, require that clay is at Karst funnel place back cover, electromagnetic exciter is connected with exciting controller, acceleration transducer is connected with data collecting instrument. after limestone simulation material in model casing with clay stabilization by consolidation, the electromagnetic exciter simulation Subway Vibration in subway simulation tunnel is started by exciting controller, two are measured near Karst funnel in limestone simulation material to acceleration by acceleration transducer, casting outlet and weighing device is utilized to measure the quality of the clay that drops from Karst funnel, according to video camera observed and recorded clay collapse process and clay areal deformation.
Accompanying drawing explanation
Fig. 1 is the structural representation (front view) of the present invention.
Fig. 2 is the side view of the present invention.
In Fig. 1,1 model casing, 2 subway simulation tunnels, 3 limestone simulation materials, 4 karst cavitys, 5 Karst funnels, 6 clays, 7 electromagnetic exciters, 8 exciting controllers, 9 acceleration transducers, 10 data collecting instruments, 11 casting outlet and weighing devices, 12 video cameras.
Detailed description of the invention
Below in conjunction with the drawings and specific embodiments, the present invention is described in detail.
Embodiment
In specific embodiment, as shown in Figure 1, first electromagnetic exciter 7 is installed in subway simulation tunnel 2 according to underground railway track pattern, limestone simulation material 3 is loaded in model casing 1 bottom, the subway simulation tunnel 2 installing electromagnetic exciter 7 is loaded model casing 1, continue to load limestone simulation material 3 in model casing 1, compact siro spinning technology between limestone simulation material 3 and subway simulation tunnel 2 need to be ensured, the process of filling limestone simulation material 3 arranges karst cavity 4 and Karst funnel 5, wherein casting outlet and weighing device 11 are arranged on bottom karst cavity 4, immediately below Karst funnel 5, limestone simulation material 3 is installed acceleration transducer 9 near Karst funnel 5, clay 6 is filled above limestone simulation material 3, require that clay 6 is at Karst funnel 5 place back cover, electromagnetic exciter 7 is connected with exciting controller 8, acceleration transducer 9 is connected with data collecting instrument 10. after limestone simulation material in model casing 13 with clay 6 stabilization by consolidation, the electromagnetic exciter 7 started in subway simulation tunnel 2 by exciting controller 8 simulates Subway Vibration, two are measured near Karst funnel 5 in limestone simulation material 3 to acceleration by acceleration transducer 9, casting outlet and weighing device 11 is utilized to measure the quality of the clay 6 that drops from Karst funnel 5, according to video camera 12 observed and recorded clay 6 collapse process and clay 6 areal deformation.

Claims (1)

1. simulate the model test apparatus that karst area Subway Vibration causes karst earthing to subside for one kind, it is characterised in that the present invention relates to content and include agent structure, excitation system and measurement system;
Described agent structure includes model casing, subway simulation tunnel and constitutes the limestone simulation material of underground karst structure, karst cavity, Karst funnel and karst earthing;
Described subway simulation tunnel is made up of Gypsum Fibrosum+glass fibre composite material;
Described limestone simulation material is made up of Gypsum Fibrosum;
Described karst cavity, Karst funnel will be piled up by limestone simulation material according to actual karst structure and form;
Described excitation system includes the exciting controller of electromagnetic exciter and the outside arranged in subway simulation tunnel;
Described electromagnetic exciter is installed in subway simulation tunnel according to underground railway track pattern, in order to simulate the vertical motion produced in subway train running and between track;
Described measurement system includes acceleration transducer, data collecting instrument, soil body weighing device and video camera;
Described acceleration transducer is arranged near Karst funnel in limestone simulation material, in order to measure near Karst funnel in limestone simulation material two to acceleration;
Described soil body weighing device is arranged on immediately below karst cavity bottom, Karst funnel, in order to measure the quality of the clay that drops from Karst funnel.
CN201610003141.8A 2016-01-04 2016-01-04 Model test device for simulating karst covering soil subsidence caused by subway vibration in karst region Active CN105628893B (en)

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Cited By (8)

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CN106645634A (en) * 2016-10-14 2017-05-10 西京学院 Ground surface simulating device and experiment method thereof
CN107505448A (en) * 2017-09-12 2017-12-22 同济大学 Seepage inflow erosion model equipment, system and test method caused by underground utilities breakage
CN107989618A (en) * 2017-11-27 2018-05-04 河南工业大学 A kind of natural arch simulator
CN108241049A (en) * 2017-12-29 2018-07-03 河海大学 The simulation monitoring system and its application method of a kind of multiple depot surface collapse situation
CN108332710A (en) * 2017-12-29 2018-07-27 浙江科技学院 Simulate the bath scaled model experimental device of intensive building area ground long-term settlement
CN108333036A (en) * 2017-12-29 2018-07-27 浙江科技学院 Highly dense area's cross-over tunnel operation causes the bath scaled model experimental device of ground long-term settlement
CN108362856A (en) * 2017-12-29 2018-08-03 浙江科技学院 The bath scaled model experimental device of the highly dense area ground long-term settlement in simcity
CN113075381A (en) * 2021-03-15 2021-07-06 华南理工大学 Test system for simulating karst earthing collapse caused by subway vibration in karst area

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CN103528831A (en) * 2012-07-03 2014-01-22 西南交通大学 Multi-target-proportion vehicle body vibration characteristic comprehensive test platform
CN104792966A (en) * 2015-04-08 2015-07-22 西南交通大学 Testing device and method for simulating stratum cavities caused by subway shield tunnel construction
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FR2530825A1 (en) * 1982-07-21 1984-01-27 Geostock Method of detecting permeable zones in advancing underground works
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Publication number Priority date Publication date Assignee Title
CN106645634A (en) * 2016-10-14 2017-05-10 西京学院 Ground surface simulating device and experiment method thereof
CN106645634B (en) * 2016-10-14 2019-08-06 西京学院 A kind of earth's surface simulator and its experimental method
CN107505448A (en) * 2017-09-12 2017-12-22 同济大学 Seepage inflow erosion model equipment, system and test method caused by underground utilities breakage
CN107505448B (en) * 2017-09-12 2020-08-14 同济大学 Seepage erosion model device, system and test method caused by underground pipeline damage
CN107989618A (en) * 2017-11-27 2018-05-04 河南工业大学 A kind of natural arch simulator
CN108362856A (en) * 2017-12-29 2018-08-03 浙江科技学院 The bath scaled model experimental device of the highly dense area ground long-term settlement in simcity
CN108333036A (en) * 2017-12-29 2018-07-27 浙江科技学院 Highly dense area's cross-over tunnel operation causes the bath scaled model experimental device of ground long-term settlement
CN108332710A (en) * 2017-12-29 2018-07-27 浙江科技学院 Simulate the bath scaled model experimental device of intensive building area ground long-term settlement
CN108332710B (en) * 2017-12-29 2020-07-14 浙江科技学院 Model experiment device for simulating long-term ground settlement of dense building group area
CN108362856B (en) * 2017-12-29 2020-08-04 浙江科技学院 Model experiment device for simulating long-term ground settlement of urban high-density area
CN108241049A (en) * 2017-12-29 2018-07-03 河海大学 The simulation monitoring system and its application method of a kind of multiple depot surface collapse situation
CN108333036B (en) * 2017-12-29 2020-10-30 浙江科技学院 Model experiment device for causing ground long-term settlement in high-concentration area overlapping tunnel operation
CN113075381A (en) * 2021-03-15 2021-07-06 华南理工大学 Test system for simulating karst earthing collapse caused by subway vibration in karst area

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