CN105510220A - Dynamic response testing system for lining structure and surrounding rocks in tunnel project - Google Patents
Dynamic response testing system for lining structure and surrounding rocks in tunnel project Download PDFInfo
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- CN105510220A CN105510220A CN201610061007.3A CN201610061007A CN105510220A CN 105510220 A CN105510220 A CN 105510220A CN 201610061007 A CN201610061007 A CN 201610061007A CN 105510220 A CN105510220 A CN 105510220A
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Abstract
The invention discloses a dynamic response testing system for a lining structure and surrounding rocks in a tunnel project. The system comprises a model box and a test loading system. The model box (100) is a cubic structure with an opening formed in top, and a damping coating (110) is arranged on the inner surface of the model box (100); a detachable tunnel template (200) penetrating through the front and rear end faces of the model box is arranged in middle of the model box, and is provided with front and rear end covers which are detachably connected with the front and rear end faces of the model box respectively, and a tunnel lining model is connected between the front and rear end covers; a vibration exciter is suspended on a steel beam, and can be controlled by a control device to control the form, magnitude and frequency of a load; one or more than one tunnel lining model is arranged between the front and rear end covers. According to the system, the dynamic responses of the lining structure and surrounding rock-soil bodies under the action of a vibration load induced by running of a train and rules of propagation of vibration waves in the transverse direction and longitudinal direction and along the depth of a tunnel can be conveniently, accurately and realistically simulated.
Description
Technical field
The present invention relates to the dynamic response test macro of liner structure and country rock in civil engineering work test field ground class experimental technique field, particularly a kind of Tunnel Engineering.
Background technology
Operationally, train load can cause tunnel structure-soil layer and ground vibration problem to subway train.Tunnel structure and the dynamic response of upper overburden layer under vibration loads of train effect complicated and changeable.Under Long-term Vibration load action, tunnel lining structure may occur that supporting cracking produces vertical transverse crack, top, hole is concrete and peel off the problems such as even bottom heave distortion.Except tunnel structure, surrounding soil also has the problems such as sand liquefaction, non-uniform settling and surface collapse and occurs under long-term High-speed Train Loads.Therefore, grasp tunnel structure dynamic response characteristics and to the Influencing Mechanism of around soil layer and Changing Pattern significant.Adopt liner structure and country rock dynamic response test macro in Tunnel Engineering, can test by the dynamic response under train operation induced vibration load tunnel lining structure and surrounding rock body, the propagation law of vibration wave is studied.
Comparatively complicated owing to adopting model test to carry out development test to Tunnel Bed Structure under Train Loads structural dynamic response characteristic, difficulty is larger.Current research mainly concentrates on abroad, the research of domestic also rare this respect.
(1) in periodical " ProceedingsoftheInstitutionofCivilEngineers-Geotechnical Engineering " second phase in 2003, Cambridge scholar Thusyanthan and Madabhushi have employed a kind of tunnel-liner and country rock dynamic response characteristics test macro, has carried out correlative study to the tunnel lining structure of different materials to the absorption of vibration wave and transmission situation.This system model case is cylindrical model case, is of a size of 900mm × 260mm (diameter × height).Loading system main body is vibrating motor, by revolution, produces eccentric force thus realizes the loading to model.This model assay systems, also has the following disadvantages:
1, accurate not to the control of load application, to the form adding load, size and frequency fail to test.
2, perfect not to the process on model casing border in model test, may there is the reflection problems of vibration wave in border.
3, simulated condition is more single in test, can not effectively to different section shape, section size and have the tunnel of crossing instances to simulate.
4, accurate not to the size of amplitude and frequency control that add load, can not the simulation tunnel train load of objective.
Summary of the invention
The object of the invention is to want above-mentioned the deficiencies in the prior art, the dynamic response test macro of liner structure and country rock in a kind of Tunnel Engineering is provided, can facilitates, simulate train operation induced vibration load action accurately, truly under liner structure and around Rock And Soil dynamic response and vibration wave along tunnel lateral direction, longitudinal direction and degree of depth propagation law.
For achieving the above object, the present invention implements according to following technical scheme:
A dynamic response test macro for liner structure and country rock in Tunnel Engineering, comprises model casing, trial load loading system, and model casing is the cube structure that top is provided with opening, and the inside surface of model casing is provided with damping coating; The one detachable tunnel form running through model casing front/rear end is arranged in the middle part of model casing; Dismounting tunnel form has former and later two end caps detachably connected with model casing front/rear end respectively, and tunnel-liner model is connected between former and later two end caps; Trial load loading system comprises vibrator and the girder steel for carrying vibrator, and the described girder steel lining model that passes through tunnel is connected in the outside of former and later two end caps; Controlled device controls can to the form of load, and the vibrator that size and frequency are controlled is suspended on girder steel; One or more tunnel-liner model is provided with between former and later two end caps.
Further, when the more than one tunnel-liner model of employing is space crossed but non-intersect state arrangement.
Further, described tunnel-liner model xsect is one of following figure: rectangle, circle and the shape of a hoof.
Further, the inner space length × wide × height of described model casing is 1500mm × 900mm × 1350mm, and the length × height of rectangular aperture is 1406mm × 700mm, and the length × height of rectangular connecting panels is 1500mm × 80mm.
Principle of work of the present invention: be applied to bottom tunnel structure by vibrator, load is accurate, stably be delivered on tunnel structure, the vibrator controlled by signal generator can to load, load form, Loading frequency and load duration manipulate, simultaneously can according to real needs, by the different speed of a motor vehicle, the simulation of different brackets train load or measured data compile load time-history curves file, by software, this load time-history curves is inputted, by vibrator, train load is loaded on tunnel structure, under simulating the different speed of a motor vehicle, the oscillatory load that train produces is on the impact of structure.
Compared with prior art, beneficial effect of the present invention:
Test unit of the present invention is arranged by detachable tunnel form, the conversion of the simulation to individual tunnel or cross tunnel dynamic response characteristics can be realized, the scope of application is wider, can test the dynamic response of tunnel structure-soil layer, can be used for studying vibration wave along the propagation of different directions and attenuation law; Trial load loading system can realize bringing out dynamic load accurate simulation to train operation, accurately controls the form of applied dynamic load, size and frequency, under the different speed of a motor vehicle can be simulated, and the oscillatory load that train produces; The inside surface of model casing is provided with damping coating makes the vibration reflection of country rock material to model casing interface reduce, and the process to model casing border in perfect model test, overcomes the vibration wave reflection problems that border there will be.
Accompanying drawing explanation
Fig. 1 is the front view of structure of the present invention;
Fig. 2 is the A-A sectional view of Fig. 1;
Fig. 3 is the K portion partial enlarged drawing of Fig. 2;
Fig. 4 is a kind of structural representation of the detachable tunnel form of the present invention;
Fig. 5 is the another kind of structural representation of the detachable tunnel form of the present invention;
Fig. 6 is the third structural representation of the detachable tunnel form of the present invention.
Embodiment
Below in conjunction with specific embodiment, the invention will be further described, is used for explaining the present invention in this illustrative examples of inventing and explanation, but not as a limitation of the invention.
Composition graphs 1, Fig. 2 and Fig. 3 can see, the dynamic response test macro of liner structure and country rock in a kind of Tunnel Engineering of the present embodiment, comprise model casing 1, trial load loading system 3, the cube structure of described model casing 1 to be the top be welded by the thick Q235 steel plate 4 of 6mm be opening (as country rock padding), the inside surface of model casing is provided with damping coating 110, is clay coating at the present embodiment damping coating.Inner space length × wide × the height of model casing is 1500mm × 900mm × 1350mm, the longitudinal length of the corresponding tunnel-liner model 10 of width herein, the geometric similarity of field of civil engineering layer during similar model test is than generally in the scope of 20-50, therefore, this model casing 1 may be used for the dielectric space of simulating 30m × 18m × 27m to 75m × 45m × 67.5m.The front end face of model casing 1 and rear end face are respectively offered the detachable tunnel form that long × high rectangular aperture 5, for 1406mm × 700mm runs through model casing front/rear end and are arranged in the middle part of model casing.Dismounting tunnel form 200 has former and later two end caps 201 and 202 detachably connected with model casing front/rear end respectively, these two end caps are by bolt-connection near the rectangular aperture 5 of the front/rear end of model casing 100, and model tunnel is connected between former and later two end caps 201 and 202; Trial load loading system 300 comprises vibrator 9 and girder steel 1, and vibrator 9 is applied to bottom tunnel-liner model 10, and girder steel 11 passes model tunnel by the outside of bolt-connection at former and later two end caps; Vibrator 9 top is connected by the first bolt 12b with girder steel 11, and girder steel 11 is fixed on the outer wall of two end caps 201 and 202 of model casing 1 by the second bolt 12c, described vibrator 9 is connected with signal amplifier, signal generator and computing machine successively.
Detachable tunnel form 200 can be dismantled easily and install, two end cap and be easy to cutting processing, can to different section shape, section size and have the tunnel of crossing instances to simulate, such as single hole tunnel (as shown in Figure 4), Parallel Tunnel (as shown in Figure 5) and space crossed tunnel (as shown in Figure 6) etc.Meanwhile, model casing 1 outside be provided with wide 70mm, thick 6mm Q235 transversely strengthening steel bar 8 and vertical reinforce steel bar 7, transversely strengthening steel bar 8 and vertical steel bar 7 of reinforcing form frame-type structure.In addition, girder steel 11 is fixed on the vertical reinforcing steel bar 7 of model casing 1 outside by the second bolt 12c, and this is vertically reinforced steel bar 7 and can be used for fixing vibrator 9.
Trial load loading system 300 forms primarily of vibrator 9 and girder steel 11, be applied to bottom tunnel-liner model 10 by vibrator 9, this vibrator is connected by the first bolt 12b with girder steel 11, simultaneously, this girder steel 11 is fixed on the vertical reinforcing steel bar 7 of model casing 1 outside by the second bolt 12c, thus stable for load can be delivered on tunnel-liner model 10.Vibrator 9 is connected with signal amplifier, signal generator and computing machine successively, by computer settings parameter, can manipulate load, load form, Loading frequency and load duration, simultaneously can according to real needs, load time-history curves file is compiled in the simulation of the different speed of a motor vehicle, different brackets train load or measured data, by software, this load time-history curves is inputted, by vibrator, train load is loaded on tunnel structure, under simulating the different speed of a motor vehicle, the oscillatory load that train produces is on the impact of structure.
Technical scheme of the present invention is not limited to the restriction of above-mentioned specific embodiment, the technology distortion that every technical scheme according to the present invention is made, and all falls within protection scope of the present invention.
Claims (7)
1. the dynamic response test macro of liner structure and country rock in a Tunnel Engineering, comprise model casing, trial load loading system, it is characterized in that, model casing (100) is provided with the cube structure of opening for top, and the inside surface of model casing is provided with damping coating (110); The one detachable tunnel form (200) running through model casing front/rear end is arranged in the middle part of model casing; Dismounting tunnel form has former and later two end caps detachably connected with model casing front/rear end respectively, and tunnel-liner model is connected between former and later two end caps; Trial load loading system (300) comprises vibrator and the girder steel for carrying vibrator, and the described girder steel lining model that passes through tunnel is connected in the outside of former and later two end caps; Controlled device controls can to the form of load, and the vibrator that size and frequency are controlled is suspended on girder steel; One or more tunnel-liner model is provided with between former and later two end caps.
2. the dynamic response test macro of liner structure and country rock in Tunnel Engineering according to claim 1, it is characterized in that, described more than one tunnel-liner model is space crossed but non-intersect state arrangement.
3. the dynamic response test macro of liner structure and country rock in Tunnel Engineering according to claim 2, it is characterized in that, described more than one tunnel-liner model is arranged in parallel in the horizontal direction.
4. the dynamic response test macro of liner structure and country rock in Tunnel Engineering according to claim 2, it is characterized in that, described more than one tunnel-liner model is arranged in parallel in the vertical direction.
5. the dynamic response test macro of liner structure and country rock in Tunnel Engineering according to claim 1 and 2, it is characterized in that, described tunnel-liner model xsect is one of following figure: rectangle, circle and the shape of a hoof.
6. the dynamic response test macro of liner structure and country rock in Tunnel Engineering according to claim 1, it is characterized in that: the inner space of described model casing is long × wide × high is 1500mm × 900mm × 1350mm, length × the height of rectangular aperture is 1406mm × 700mm, and the length × height of rectangular connecting panels is 1500mm × 80mm.
7. the dynamic response test macro of liner structure and country rock in Tunnel Engineering according to claim 1, is characterized in that: it is clay coating that the inside surface of described model casing is provided with damping coating.
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Cited By (7)
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| CN106959338A (en) * | 2017-03-10 | 2017-07-18 | 西南交通大学 | A kind of dynamic response analogue means of multi-level underground space structure and country rock |
| CN108181072A (en) * | 2018-03-09 | 2018-06-19 | 西南交通大学 | System is tested for the dynamic response of tunnel structure and country rock in rich water sandy soil stratum |
| CN108593892A (en) * | 2018-06-22 | 2018-09-28 | 西南交通大学 | Tunnel-liner model, the experimental rig and experimental method for simulating tunnel longitudinal effect |
| RU184676U1 (en) * | 2018-07-10 | 2018-11-02 | Федеральное государственное автономное образовательное учреждение высшего образования "Балтийский федеральный университет имени Иммануила Канта" (БФУ им. И. Канта) | Device for determining the damping coefficient of bulk materials and liquids |
| CN109030033A (en) * | 2018-06-21 | 2018-12-18 | 浙江大学城市学院 | A kind of experimental rig for simulating two-wire Subway Train Operation in Existed Subway operating condition |
| CN109030034A (en) * | 2018-06-21 | 2018-12-18 | 浙江大学城市学院 | A kind of experimental rig of simulation two-wire metro operation vibration |
| CN112857967A (en) * | 2021-01-18 | 2021-05-28 | 西南交通大学 | Dynamic response test system of lining cutting structure and country rock under seepage flow effect |
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Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106959338A (en) * | 2017-03-10 | 2017-07-18 | 西南交通大学 | A kind of dynamic response analogue means of multi-level underground space structure and country rock |
| CN108181072A (en) * | 2018-03-09 | 2018-06-19 | 西南交通大学 | System is tested for the dynamic response of tunnel structure and country rock in rich water sandy soil stratum |
| CN109030033A (en) * | 2018-06-21 | 2018-12-18 | 浙江大学城市学院 | A kind of experimental rig for simulating two-wire Subway Train Operation in Existed Subway operating condition |
| CN109030034A (en) * | 2018-06-21 | 2018-12-18 | 浙江大学城市学院 | A kind of experimental rig of simulation two-wire metro operation vibration |
| CN108593892A (en) * | 2018-06-22 | 2018-09-28 | 西南交通大学 | Tunnel-liner model, the experimental rig and experimental method for simulating tunnel longitudinal effect |
| RU184676U1 (en) * | 2018-07-10 | 2018-11-02 | Федеральное государственное автономное образовательное учреждение высшего образования "Балтийский федеральный университет имени Иммануила Канта" (БФУ им. И. Канта) | Device for determining the damping coefficient of bulk materials and liquids |
| CN112857967A (en) * | 2021-01-18 | 2021-05-28 | 西南交通大学 | Dynamic response test system of lining cutting structure and country rock under seepage flow effect |
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