CN211784774U - Test device for simulating tunnel excavation deformation control - Google Patents
Test device for simulating tunnel excavation deformation control Download PDFInfo
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- CN211784774U CN211784774U CN202020101401.7U CN202020101401U CN211784774U CN 211784774 U CN211784774 U CN 211784774U CN 202020101401 U CN202020101401 U CN 202020101401U CN 211784774 U CN211784774 U CN 211784774U
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- deformation control
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- 238000009412 basement excavation Methods 0.000 title claims abstract description 31
- 238000012360 testing method Methods 0.000 title claims abstract description 28
- 239000002689 soil Substances 0.000 claims abstract description 47
- 239000007788 liquid Substances 0.000 claims description 102
- 238000002347 injection Methods 0.000 claims description 17
- 239000007924 injection Substances 0.000 claims description 17
- 239000011435 rock Substances 0.000 abstract description 21
- 238000004088 simulation Methods 0.000 abstract description 12
- 238000011160 research Methods 0.000 abstract description 7
- 238000000034 method Methods 0.000 abstract description 5
- 238000011156 evaluation Methods 0.000 abstract description 3
- 230000003993 interaction Effects 0.000 abstract description 2
- 230000007547 defect Effects 0.000 abstract 1
- 238000004804 winding Methods 0.000 description 5
- 238000010998 test method Methods 0.000 description 4
- 238000009530 blood pressure measurement Methods 0.000 description 3
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 3
- 238000004364 calculation method Methods 0.000 description 2
- 238000005094 computer simulation Methods 0.000 description 2
- 241000208202 Linaceae Species 0.000 description 1
- 235000004431 Linum usitatissimum Nutrition 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000007599 discharging Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000004744 fabric Substances 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 229920002635 polyurethane Polymers 0.000 description 1
- 239000004814 polyurethane Substances 0.000 description 1
- 239000000243 solution Substances 0.000 description 1
- 230000001360 synchronised effect Effects 0.000 description 1
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- Excavating Of Shafts Or Tunnels (AREA)
Abstract
The utility model discloses a test device for simulating tunnel excavation deformation control, which comprises a model box, wherein a soil body is filled in the model box, a tunnel hole is formed in the soil body, a tunnel model and a deformation control device are arranged in the tunnel hole, the deformation control device is arranged between the tunnel model and the soil body and is in direct contact with the soil body, and the tunnel model is wrapped outside the tunnel model by the deformation control device; the test device can make up the defects of a method for independently simulating the stress characteristics of the tunnel or the surrounding rock in the traditional model test, can dynamically simulate the interaction and the mechanical characteristics of the tunnel model and the surrounding rock during tunnel excavation, provides richer test data for the application research of complex geological conditions and novel tunnel structures, and makes the evaluation of the mechanical characteristics of the surrounding rock and the tunnel more reliable during tunnel excavation simulation.
Description
Technical Field
The utility model relates to a highway tunnel construction technical field specifically is a test device of simulation tunnel excavation deformation control.
Background
When a novel tunnel supporting form or the structural safety of a tunnel under a complex geological condition is required to be researched and an identifiable scheme is lacked, a scale-down ratio test is usually carried out to research the mechanical characteristics of a complex surrounding rock or a novel tunnel structure.
The existing test method usually carries out the surrounding rock and the tunnel separately, or researches the mechanical characteristics of the tunnel structure under the surrounding rock, or researches the mechanical characteristics of the surrounding rock under the tunnel excavation, and lacks a test device which can consider the mutual influence of the tunnel excavation on the surrounding rock and the tunnel structure.
SUMMERY OF THE UTILITY MODEL
The single to present tunnel model test method, the utility model provides a test device and method of simulation tunnel excavation deformation control can carry out synchronous research to the mechanical properties of tunnel and country rock in the simulation tunnel excavation.
The utility model discloses a realize through following technical scheme:
a test device for simulating tunnel excavation deformation control comprises a model box, a tunnel model and a liquid storage pipe;
the model box is filled with soil, the tunnel model is embedded in the soil, the liquid storage pipe is wound on the outer wall of the tunnel model in a layered manner, liquid is filled in the liquid storage pipe, and a liquid measuring device is arranged at the outlet of the liquid storage pipe;
a plurality of pressure measuring devices are further embedded in the soil body and located at the top of the tunnel model.
Preferably, a liquid injection switch and a liquid injection connector are arranged on a liquid inlet of the liquid storage pipe, the liquid injection connector is connected with a liquid source, a liquid discharge switch and a liquid discharge connector are sequentially arranged on a liquid outlet of the liquid storage pipe, and the liquid discharge connector is connected with a liquid measuring device.
Preferably, the liquid storage pipe is spirally wound on the outer wall of the tunnel model, and the diameter of the liquid storage pipe is less than or equal to one fifth of the diameter of the tunnel model.
Preferably, the pressure measurement devices are arranged at intervals from bottom to top, the distance between every two adjacent pressure measurement devices is 0.5 times of the outer diameter of the tunnel model, and the distance between the pressure measurement device at the lowest layer and the top of the tunnel model is 0.5 times of the outer diameter of the tunnel model.
Preferably, the pressure measuring device is a miniature soil pressure cell.
Preferably, both ends of the tunnel model are in contact with both side walls of the model box, respectively.
Compared with the prior art, the utility model discloses following profitable technological effect has:
the utility model provides a pair of test device of simulation tunnel excavation deformation control, through filling the soil body in the model case, and pre-buried tunnel model and the miniature soil pressure cell of winding liquid pipe in the soil body, when measuring the deflection of tunnel excavation, with the liquid discharge in the liquid storage pipe, through the deflection in discharge amount calculation tunnel of liquid, read the pressure value of miniature soil pressure cell simultaneously, according to the deflection in tunnel and the pressure value of miniature soil pressure cell, can obtain the dynamic change relation that the country rock pressure warp along with the country rock.
Drawings
FIG. 1 is a test device for simulating deformation control of tunnel excavation according to the present invention;
FIG. 2 is a cross-sectional view of the test device for simulating deformation control of tunnel excavation according to the present invention;
FIG. 3 is a view of the deformation control device of the present invention;
fig. 4 is a cross-sectional view of the deformation control device of the present invention;
fig. 5 is the layout diagram of the miniature soil pressure cell in the tunnel excavation deformation control method of the utility model.
In the figure: 1-model box, 2-soil body, 3-tunnel model, 4-liquid storage pipe, 5-liquid injection switch, 6-liquid injection joint, 7-liquid discharge switch, 8-liquid discharge joint and 9-liquid measuring device.
Detailed Description
The present invention will now be described in further detail with reference to the accompanying drawings, which are provided for purposes of illustration and not limitation.
Referring to fig. 1-4, a test device for simulating tunnel excavation deformation control comprises a model box 1, a tunnel model 3 and a liquid storage pipe 4.
The model box 1 is filled with soil 2, the tunnel model 3 is embedded in the soil 2, the liquid storage pipe 4 is wound on the outer wall of the tunnel model 3 in a layered manner, liquid is filled in the liquid storage pipe 4, and a liquid measuring device 9 is arranged at the outlet of the liquid storage pipe 4;
a plurality of miniature soil pressure boxes 10 are also embedded in the soil body 2, and the miniature soil pressure boxes 10 are positioned at the top of the tunnel model 3.
The utility model provides a pair of test device of simulation tunnel excavation deformation control, through the filling soil body in model box 1, and pre-buried winding liquid pipe's tunnel model 3 and miniature soil pressure cell 10 in the soil body, when measuring the deflection of tunnel excavation, with the liquid discharge in the liquid reserve pipe, through the deflection in discharge amount calculation tunnel of liquid, read miniature soil pressure cell 10's pressure value simultaneously, according to the deflection in tunnel and miniature soil pressure cell 10's pressure value, can obtain the dynamic change relation that the country rock pressure warp along with the country rock.
This test device of simulation tunnel excavation deformation control can compensate in traditional model test not enough to tunnel or surrounding rock stress characteristics individual simulation method, and the interact and the mechanical properties of tunnel model and surrounding rock when can dynamic simulation tunnel excavation provide abundanter test data to the application research of complicated geological conditions and novel tunnel structure, and the messenger when the simulation tunnel excavation, is more reliable to the mechanical properties evaluation of surrounding rock and tunnel.
The liquid inlet and the liquid outlet of the liquid storage pipe 4 are both positioned outside the model box, the liquid inlet is provided with a liquid injection switch 5 and a liquid injection connector 6, the liquid injection connector 6 is connected with a liquid source, and the liquid injection switch 5 controls the opening or closing of the liquid inlet.
The liquid outlet sets gradually flowing back switch 7 and flowing back and connects 8, and flowing back connects 8 and is connected with liquid measuring device 9.
The liquid storage pipe is spirally wound on the outer wall of the tunnel model 3, the number of winding turns and the number of layers are determined according to the required deformation, and the diameter of the liquid storage pipe is not more than one fifth of the diameter of the tunnel model 3.
The lining material of the liquid storage pipe is polyurethane, the outer surface of the liquid storage pipe is wrapped by flax braided fabric, the outer surface of the liquid storage pipe is marked with scales, and the minimum scale is millimeter.
The inlet and the liquid outlet of liquid reserve pipe are all worn out from tunnel model 3's inside, tunnel model 3 is both ends open-ended tubbiness structure, and tunnel model's length is the same with the length of mold box, places in the mold box when tunnel model, and tunnel model's both ends contact with two lateral walls of mold box respectively, avoid the soil body to enter into tunnel model.
The distance between two adjacent miniature soil pressure cells 10 is 0.5 times of the outer diameter of the tunnel model, and the distance between the miniature soil pressure cell 10 at the lowest layer and the top of the tunnel model is 0.5 times of the outer diameter of the tunnel model.
Referring to fig. 5, the following is to the test method of the test device for simulating tunnel excavation deformation control provided by the present invention is explained in detail, which includes the following steps:
And 2, tightly winding the liquid storage pipe 4 outside the tunnel model 3, determining the number of winding turns and the number of layers according to the required deformation, recording an initial scale L1 and a termination scale L2 of the liquid storage pipe wound on the tunnel model, and obtaining the length of the liquid storage pipe wound on the tunnel model according to L1 and L2.
And 3, calculating the position of the deformation control device in the model box, and determining the height h of the tunnel model 3 from the bottom of the model box.
And 4, filling soil 2 in the model box 1 layer by layer, and tamping according to the required requirements. And (3) when the filling height of the soil body 2 reaches the height h, placing the liquid storage pipe wound in the step (2) and the tunnel model in a model box.
And 5, continuously filling the soil body 2, burying a plurality of miniature soil pressure boxes 10 in the soil body from bottom to top at intervals, wherein the distance between the lowest miniature soil pressure box 10 and the top of the tunnel is 0.5 times of the outer diameter D of the tunnel model, the distance between two adjacent miniature soil pressure boxes 10 is 0.5 times of the outer diameter D of the tunnel model, filling the soil body to the upper edge of the model box, and meanwhile numbering the miniature soil pressure boxes 10 from bottom to top sequentially by p1 and p2 … ….
And 6, opening a liquid discharge switch 7, discharging 1/n of liquid in the liquid storage pipe 4, collecting the discharged water by using the liquid measuring device 9, observing the readings of all the soil pressure boxes 10 every half hour, and recording the discharged volume V and the reading p of each miniature soil pressure box 10 when the readings of two times are the same, namely the pressure of the soil body is in a stable state.
And 7, repeating the step 6 until the liquid in the liquid storage pipe is completely discharged, and recording the amount of the discharged liquid each time and the corresponding reading of all the soil pressure boxes 10.
And 8, converting the quantity of the liquid in the liquid measuring device 9 into tunnel deformation in a volume mode according to the tunnel model and the size parameters of the liquid storage pipe to achieve the purpose of simulating tunnel deformation, wherein the volume V is converted into the tunnel deformation s according to the following formula.
Wherein D is the outer diameter of the tunnel model, D is the diameter of the liquid storage pipe and the volume of the V liquid.
And 9, drawing the pressure relation between the tunnel deformation s and the soil body according to the obtained all tunnel deformation s and the corresponding pressure parameters of each miniature soil pressure cell 10 to obtain the dynamic change relation of the surrounding rock pressure along with the surrounding rock deformation.
The utility model discloses a test device and test method of simulation tunnel excavation deformation control can compensate among the traditional model test not enough to tunnel or country rock atress characteristic independent simulation method, and the interaction and the mechanical properties of tunnel model and country rock when can dynamic simulation tunnel excavation provide abundanter test data to the applied research of complicated geological conditions and novel tunnel structure, and what make when simulation tunnel excavation, is more reliable to the mechanical properties evaluation in country rock and tunnel.
The above contents are only for explaining the technical idea of the present invention, and the protection scope of the present invention cannot be limited thereby, and any modification made on the basis of the technical solution according to the technical idea of the present invention all fall within the protection scope of the claims of the present invention.
Claims (6)
1. A test device for simulating tunnel excavation deformation control is characterized by comprising a model box (1), a tunnel model (3) and a liquid storage pipe (4);
the tunnel model is characterized in that a soil body (2) is filled in the model box (1), the tunnel model (3) is embedded in the soil body (2), the liquid storage pipe (4) is wound on the outer wall of the tunnel model (3) in a layered manner, liquid is filled in the liquid storage pipe (4), and a liquid measuring device (9) is arranged at the outlet of the liquid storage pipe (4);
a plurality of pressure measuring devices are further embedded in the soil body (2), and the pressure measuring devices are located at the top of the tunnel model (3).
2. The device for testing the deformation control of the simulated tunnel excavation according to claim 1, wherein a liquid injection switch (5) and a liquid injection connector (6) are arranged on a liquid inlet of the liquid storage pipe (4), the liquid injection connector (6) is connected with a liquid source, a liquid discharge switch (7) and a liquid discharge connector (8) are sequentially arranged on a liquid outlet of the liquid storage pipe, and the liquid discharge connector (8) is connected with a liquid measuring device (9).
3. The test device for simulating the deformation control of tunnel excavation according to claim 1, wherein the liquid storage pipe is spirally wound on the outer wall of the tunnel model (3), and the diameter of the liquid storage pipe is less than or equal to one fifth of the diameter of the tunnel model (3).
4. The apparatus of claim 1, wherein the pressure measuring devices are spaced from bottom to top, and the distance between two adjacent pressure measuring devices is 0.5 times the outer diameter of the tunnel model, and the distance between the lowest pressure measuring device and the top of the tunnel model is 0.5 times the outer diameter of the tunnel model.
5. The test device for simulating tunnel excavation deformation control according to claim 4, wherein the pressure measuring device is a miniature soil pressure cell (10).
6. The test device for simulating tunnel excavation deformation control according to claim 1, wherein two ends of the tunnel model (3) are respectively in contact with two side walls of the model box (1).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020101401.7U CN211784774U (en) | 2020-01-16 | 2020-01-16 | Test device for simulating tunnel excavation deformation control |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020101401.7U CN211784774U (en) | 2020-01-16 | 2020-01-16 | Test device for simulating tunnel excavation deformation control |
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| Publication Number | Publication Date |
|---|---|
| CN211784774U true CN211784774U (en) | 2020-10-27 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202020101401.7U Expired - Fee Related CN211784774U (en) | 2020-01-16 | 2020-01-16 | Test device for simulating tunnel excavation deformation control |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113281179A (en) * | 2021-05-21 | 2021-08-20 | 中铁第一勘察设计院集团有限公司 | Shield tunnel excavation model test box |
-
2020
- 2020-01-16 CN CN202020101401.7U patent/CN211784774U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113281179A (en) * | 2021-05-21 | 2021-08-20 | 中铁第一勘察设计院集团有限公司 | Shield tunnel excavation model test box |
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Granted publication date: 20201027 |