CN110593895B - Unilateral uninstallation lower model tunnel section of jurisdiction warp measuring device - Google Patents
Unilateral uninstallation lower model tunnel section of jurisdiction warp measuring device Download PDFInfo
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- CN110593895B CN110593895B CN201910894783.5A CN201910894783A CN110593895B CN 110593895 B CN110593895 B CN 110593895B CN 201910894783 A CN201910894783 A CN 201910894783A CN 110593895 B CN110593895 B CN 110593895B
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- 229910000831 Steel Inorganic materials 0.000 claims abstract description 72
- 239000010959 steel Substances 0.000 claims abstract description 72
- 238000006073 displacement reaction Methods 0.000 claims abstract description 29
- 239000002689 soil Substances 0.000 claims abstract description 21
- 239000011521 glass Substances 0.000 claims abstract description 5
- 239000000523 sample Substances 0.000 claims description 6
- 238000013508 migration Methods 0.000 claims description 5
- 230000005012 migration Effects 0.000 claims description 5
- 238000009412 basement excavation Methods 0.000 description 6
- 238000010276 construction Methods 0.000 description 5
- 238000012360 testing method Methods 0.000 description 5
- 230000013011 mating Effects 0.000 description 3
- 238000011161 development Methods 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 230000000149 penetrating effect Effects 0.000 description 2
- 230000001133 acceleration Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000012544 monitoring process Methods 0.000 description 1
- 238000002360 preparation method Methods 0.000 description 1
- 238000011160 research Methods 0.000 description 1
- 230000001360 synchronised effect Effects 0.000 description 1
- 238000003466 welding Methods 0.000 description 1
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- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21D—SHAFTS; TUNNELS; GALLERIES; LARGE UNDERGROUND CHAMBERS
- E21D11/00—Lining tunnels, galleries or other underground cavities, e.g. large underground chambers; Linings therefor; Making such linings in situ, e.g. by assembling
- E21D11/04—Lining with building materials
- E21D11/08—Lining with building materials with preformed concrete slabs
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- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21D—SHAFTS; TUNNELS; GALLERIES; LARGE UNDERGROUND CHAMBERS
- E21D11/00—Lining tunnels, galleries or other underground cavities, e.g. large underground chambers; Linings therefor; Making such linings in situ, e.g. by assembling
- E21D11/14—Lining predominantly with metal
- E21D11/18—Arch members ; Network made of arch members ; Ring elements; Polygon elements; Polygon elements inside arches
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- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21F—SAFETY DEVICES, TRANSPORT, FILLING-UP, RESCUE, VENTILATION, OR DRAINING IN OR OF MINES OR TUNNELS
- E21F17/00—Methods or devices for use in mines or tunnels, not covered elsewhere
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21F—SAFETY DEVICES, TRANSPORT, FILLING-UP, RESCUE, VENTILATION, OR DRAINING IN OR OF MINES OR TUNNELS
- E21F17/00—Methods or devices for use in mines or tunnels, not covered elsewhere
- E21F17/18—Special adaptations of signalling or alarm devices
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- G—PHYSICS
- G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
- G09B—EDUCATIONAL OR DEMONSTRATION APPLIANCES; APPLIANCES FOR TEACHING, OR COMMUNICATING WITH, THE BLIND, DEAF OR MUTE; MODELS; PLANETARIA; GLOBES; MAPS; DIAGRAMS
- G09B25/00—Models for purposes not provided for in G09B23/00, e.g. full-sized devices for demonstration purposes
- G09B25/04—Models for purposes not provided for in G09B23/00, e.g. full-sized devices for demonstration purposes of buildings
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- Engineering & Computer Science (AREA)
- Mining & Mineral Resources (AREA)
- Life Sciences & Earth Sciences (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Geology (AREA)
- Structural Engineering (AREA)
- Architecture (AREA)
- Civil Engineering (AREA)
- Business, Economics & Management (AREA)
- Physics & Mathematics (AREA)
- Educational Administration (AREA)
- Educational Technology (AREA)
- General Physics & Mathematics (AREA)
- Theoretical Computer Science (AREA)
- Excavating Of Shafts Or Tunnels (AREA)
Abstract
The invention relates to a device for measuring the deformation of a pipe piece of a model tunnel under the condition of unilateral unloading.A retaining wall at one side of a model box can horizontally move or rotate; the model box is provided with a U-shaped steel bracket, pulleys are arranged at two ends of the U-shaped steel bracket, one part of the U-shaped steel bracket penetrates through the model tunnel, the part of the steel bracket is made of steel pipes, wire routing holes are formed in the part of the steel bracket at intervals, steel rings are welded at the same time, 4 displacement sensors are connected to the steel rings through bolts, and data wires of the displacement sensors penetrate through the wire routing holes and are led out of the model tunnel through the steel pipes; the model tunnel is made of steel pipes or organic glass pipes, 4 circular grooves and 4 wire outlets are arranged on the wall of the model tunnel at intervals, soil pressure sensors are installed in the grooves, and the 4 wire outlets are respectively arranged beside the 4 circular grooves. The invention provides a model tunnel segment deformation measuring device which can simulate the deformation of a tunnel segment after unloading and can measure the deformation.
Description
Technical Field
The invention relates to a device for measuring the deformation of a molded tunnel segment under unilateral unloading in the field of subway shield tunnel engineering.
Background
With the acceleration of the urbanization process, the existing municipal engineering can not meet the urban development requirements, and under the condition that urban construction land is increasingly tense, the utilization and development of underground engineering arranged in tunnel engineering become more and more important. The construction is inevitably needed in the area near the existing tunnel sometimes, for example, foundation ditch excavation etc. for the earth around the existing subway tunnel produces the disturbance, that is to say excavation off-load influences the stress state in existing subway tunnel, and the stress state in subway tunnel changes the back, can make existing subway tunnel produce the deformation, influences the stationarity of subway operation, leads to derailing when serious, causes the casualties. Therefore, the construction in the area near the existing tunnel has important significance for analyzing and predicting the deformation of the existing subway tunnel. By knowing the influence rule of excavation unloading on the deformation of the tunnel, the monitoring, predicting and forecasting work of the deformation of the tunnel is enhanced, and the method is of great importance to the normal use and safety of the tunnel. In order to better understand the influence of the deformation on the tunnel engineering, a related model test can be carried out by establishing a model with a smaller size so as to research the influence of excavation and unloading of the foundation pit on the deformation of the side-direction operation tunnel in the actual engineering.
Disclosure of Invention
The invention aims to provide a model tunnel segment deformation measuring device which can simulate the deformation of a tunnel segment after unloading and can measure the deformation.
In order to solve the technical problems, the technical scheme of the invention is as follows:
a pipe piece deformation measuring device for a single-side unloading lower model tunnel comprises a model box, a model tunnel, a U-shaped steel bracket and a displacement sensor, wherein a retaining wall on one side of the model box can horizontally move or rotate; the model box is provided with a U-shaped steel bracket, and pulleys are arranged at two ends of the U-shaped steel bracket and can horizontally move on a frame at the top of the model box; one part of the U-shaped steel support penetrates through the model tunnel, the part of the U-shaped steel support is made of steel pipes, wire passing holes are formed in the part of the steel support at intervals, steel rings are welded at the same time, 4 displacement sensors are connected to the steel rings through bolts and used for measuring horizontal deformation and vertical deformation of the model tunnel, and data wires of the displacement sensors penetrate through the wire passing holes and are led out of the model tunnel through the steel pipes; the model tunnel is made by steel pipe or organic glass pipe, is equipped with 4 circular recesses and 4 wire holes at every certain distance on the model tunnel pipe wall, and 4 circular recesses and 4 wire holes set up on the model tunnel pipe wall along the circumferencial direction interval, install soil pressure sensor in the circular recess, and 4 wire holes are established respectively on the next door of 4 circular recesses.
The U-shaped steel support is a hollow rod and is installed on the model box, and pulleys are arranged at two ends of the U-shaped steel support and can horizontally move on a framework at the top of the model box.
One part of the U-shaped steel support penetrates through the model tunnel, the part of the U-shaped steel support is made of square steel pipes, wire routing holes are reserved on the part of the U-shaped steel support at certain intervals, steel circular rings are welded at the same time, and the steel circular rings are connected with 4 displacement sensors through bolts.
The displacement sensor is a resistance strain type displacement sensor and is used for measuring horizontal deformation and vertical deformation of the model tunnel. This displacement sensor's telescopic probe contacts with the inner wall in model tunnel all the time to measure the horizontal displacement and the vertical displacement in model tunnel, resistance strain formula displacement sensor includes sensor housing and telescopic probe.
And a data wire of the displacement sensor passes through the wire outlet hole and is led out of the model tunnel through the steel pipe.
The model tunnel is made of a thin-wall round steel pipe or an organic glass pipe, and 4 round grooves and 4 wire outlet holes are formed in the wall of the model tunnel at certain intervals.
The 4 circular grooves are respectively arranged on the horizontal and vertical pipe walls of the model tunnel; the 4 wire outlet holes are respectively arranged beside the 4 circular grooves.
The soil pressure sensor is arranged in the circular groove and used for measuring the pressure of the soil layer around the model tunnel.
The model box includes model box bottom plate and model box curb plate, and the length and width height of the inside headroom size of model box is 2.4m, 1.6m and 2.2m respectively, and wherein the posterior lateral plate does but model box one side horizontal migration or pivoted barricade are provided with drive posterior lateral plate horizontal migration or pivoted ejector pin on the model box.
The invention has the beneficial effects that: during the test, firstly, filling a small part of soil in the model box; secondly, installing the model tunnel in place by using a crane beam; thirdly, enabling the U-shaped steel support to penetrate through the model tunnel, and fixing two ends of the U-shaped steel support on the model box; thirdly, mounting a soil pressure sensor on the wall of the model tunnel pipe; thirdly, filling soil to cover the model tunnel; then, the retaining wall on one side of the model box moves horizontally or rotates, the displacement sensor arranged on the U-shaped steel bracket in the model tunnel can measure the horizontal deformation and the vertical deformation of the tunnel, and meanwhile, the soil pressure sensor in the groove on the pipe wall of the model tunnel can measure the soil pressure acting on the model tunnel. The device can study the influence of foundation ditch excavation uninstallation to side direction operation tunnel deformation in the actual engineering.
Drawings
FIG. 1 is a schematic structural view of embodiment 1 of the invention;
FIG. 2 is a schematic view of the mating of the mold box and the steel bracket of FIG. 1;
FIG. 3 is a schematic view of the mating of a single sensor of FIG. 1 to a support rod;
FIG. 4 is a schematic view of the construction of the mold box of FIG. 1;
FIG. 5 is a schematic diagram of the construction of the model tunnel of FIG. 1;
FIG. 6 is a schematic view of the mating of the model tunnel with the steel bracket of FIG. 1;
FIG. 7 is a perspective view of FIG. 1;
fig. 8 is a schematic view showing the engagement of the ejector pin with the rear side plate in embodiment 2 of the present invention.
Detailed Description
An embodiment 1 of a device for measuring deformation of a tunnel segment under unilateral unloading is shown in fig. 1 to 7: the measuring device comprises a model tunnel 5 and a U-shaped steel bracket penetrating through the model tunnel, wherein in the embodiment, the model tunnel 5 is made of a thin-wall round steel pipe or an organic glass pipe, 4 round grooves 15 and 4 wire outlet holes 20 are arranged on the pipe wall of the model tunnel at intervals, and a soil pressure sensor is arranged in each round groove 15 and used for measuring the horizontal and vertical pressures of a soil layer around the model tunnel; the 4 wire outlet holes 20 are respectively arranged beside the 4 circular grooves.
U shaped steel support both ends are equipped with left side pulley 3 and right side pulley 8, can be at model box top frame horizontal migration, the adjustment of the U shaped steel support initial erection position of being convenient for like this, one part wherein of U shaped steel support is passed the model tunnel, this part steel support 2 is formed with circular steel pipe preparation, it has walking hole 30 to leave along circumference interval on this part steel support, the welding has steel ring 25 simultaneously, there are 4 displacement sensor 6 with bolted connection on the steel ring, be used for measuring model tunnel horizontal deformation and vertical deformation, wherein displacement sensor's data line passes walking hole 30, lead to the model tunnel outside through circular steel pipe. In the present embodiment, the displacement sensor is a resistance strain type displacement sensor, which includes a sensor housing 17 and a pogo pin 18. The sensor shell 17 is fixed on the steel ring 25 through a U-shaped clamp 16; the outer end of the telescopic probe 18 is in contact fit with the inner wall of the model tunnel 6, and the inner end of the telescopic probe 18 corresponds to the wiring hole.
The measuring device further comprises a model box 14, the model box 14 comprises a model box bottom plate 9 and a model box side plate, the model box side plate comprises a front side plate 4, a rear side plate 10, a left side plate 1 and a right side plate 7, the front side plate 4, the left side plate 1 and the right side plate 7 are fixed on the model box bottom plate 9, the rear side plate 10 is a movable retaining wall, rollers are arranged at the bottom of the rear side plate, and roller guide grooves matched with the rollers are formed in the model box bottom plate. An upper cross beam 12 and a lower cross beam 19 are arranged behind the rear side plate, a push rod for driving the rear side plate to horizontally move or rotate is arranged on the model box, the push rod comprises an upper bolt rod 13 connected to the upper cross beam 12 and a lower bolt rod 13 connected to the lower cross beam 19, the upper bolt rod 13 and the lower bolt rod 13 are respectively connected with the corresponding cross beams through threaded holes, and the front ends of the upper bolt rod 13 and the lower bolt rod 13 are connected to the rear side plate through a spherical hinge 21. The rear ends of the push rods are all welded with rotating handles 11, and when the upper and lower bolt rods output synchronous actions, the rear side plate can move horizontally; when the output of the upper and lower bolt rods does not synchronize, the rear side plate can be adjusted in a rotating way.
When in use, firstly filling a small part of soil in the model box; secondly, installing the model tunnel in place by using a crane beam, and after the model tunnel is installed in place, penetrating the U-shaped steel bracket through the model tunnel, wherein two ends of the U-shaped steel bracket are fixed on the model box. The soil pressure sensor is installed on the wall of the model tunnel pipe, soil is filled again to cover the model tunnel, soil is filled continuously to the designated height, then the rotating handle at the rear end of the ejector rod can be adjusted manually, the upper bolt rod and the lower bolt rod move, the rear side plate also moves under the pressure action of the test soil layer, the test soil fills a gap generated by the movement of the rear side plate, the change of unloading force is realized, the acting force of the test soil between the model tunnels changes, and the model tunnel can generate corresponding displacement. Because the pulleys are arranged at the two ends of the U-shaped steel support, the U-shaped steel support can horizontally move on the framework at the top of the model box, and therefore the influence of excavation and unloading of a foundation pit on the deformation of tunnels at different lateral positions in actual engineering can be simulated. In other embodiments of the present invention, the number of steel rings may be set as desired.
An example 2 of the model tunnel segment deformation measuring device is shown in fig. 8: embodiment 2 is different from embodiment 1 in that the ejector rod capable of outputting the linear translational motion may also be a hydraulic ejector rod 22 (or a pneumatic ejector rod or an electric push rod), the hydraulic ejector rod 22 is hinged to the rear side plate 10, the hinge structure includes a first connecting plate 24 fixedly connected to the rear side plate and a second connecting plate 23 fixedly connected to the hydraulic ejector rod, and the first connecting plate 24 is connected to the second connecting plate 23 through a hinge shaft 26.
Claims (7)
1. The utility model provides a model tunnel section of jurisdiction deformation measuring device under unilateral uninstallation which characterized in that: the device comprises a model box, a model tunnel, a U-shaped steel bracket and a displacement sensor, wherein a retaining wall on one side of the model box can horizontally move or rotate; the model box is provided with a U-shaped steel bracket, and pulleys are arranged at two ends of the U-shaped steel bracket and can horizontally move on a frame at the top of the model box; one part of the U-shaped steel support penetrates through the model tunnel, the part of the U-shaped steel support is made of steel pipes, wire passing holes are formed in the part of the steel support at intervals, steel rings are welded at the same time, 4 displacement sensors are connected to the steel rings through bolts and used for measuring horizontal deformation and vertical deformation of the model tunnel, and data wires of the displacement sensors penetrate through the wire passing holes and are led out of the model tunnel through the steel pipes; the model tunnel is made by steel pipe or organic glass pipe, is equipped with 4 circular recesses and 4 wire holes at every certain distance on the model tunnel pipe wall, and 4 circular recesses and 4 wire holes set up on the model tunnel pipe wall along the circumferencial direction interval, install soil pressure sensor in the circular recess, and 4 wire holes are established respectively on the next door of 4 circular recesses.
2. The device for measuring the deformation of the duct piece of the model tunnel under the condition of unilateral unloading according to claim 1, wherein: the U-shaped steel support is a hollow rod and is installed on the model box, and pulleys are arranged at two ends of the U-shaped steel support and can horizontally move on a framework at the top of the model box.
3. The device for measuring the deformation of the duct piece of the model tunnel under the condition of unilateral unloading according to claim 2, wherein: one part of the U-shaped steel support penetrates through the model tunnel, the part of the U-shaped steel support is made of square steel pipes, wire routing holes are reserved on the part of the U-shaped steel support at certain intervals, steel circular rings are welded at the same time, and the steel circular rings are connected with 4 displacement sensors through bolts.
4. The device for measuring the deformation of the duct piece of the model tunnel under the condition of unilateral unloading according to claim 3, wherein: the displacement sensor is a resistance strain type displacement sensor and is used for measuring horizontal deformation and vertical deformation of the model tunnel, the telescopic probe of the displacement sensor is always in contact with the inner wall of the model tunnel, so that the horizontal displacement and the vertical displacement of the model tunnel are measured, and the resistance strain type displacement sensor comprises a sensor shell and a telescopic probe.
5. The device for measuring the deformation of a model tunnel segment under the condition of unilateral unloading according to claim 4, is characterized in that: the 4 circular grooves are respectively arranged on the horizontal and vertical pipe walls of the model tunnel; the 4 wire outlet holes are respectively arranged beside the 4 circular grooves.
6. The device for measuring the deformation of the duct piece of the model tunnel under the condition of unilateral unloading according to claim 1, wherein: the soil pressure sensor is arranged in the circular groove and used for measuring the pressure of the soil layer around the model tunnel.
7. The device for measuring the deformation of the model tunnel segment under the condition of unilateral unloading according to any one of claims 1-6, which is characterized in that: the model box includes model box bottom plate and model box curb plate, and the length and width height of the inside headroom size of model box is 2.4m, 1.6m and 2.2m respectively, and wherein the posterior lateral plate does but model box one side horizontal migration or pivoted barricade are provided with drive posterior lateral plate horizontal migration or pivoted ejector pin on the model box.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910894783.5A CN110593895B (en) | 2019-09-20 | 2019-09-20 | Unilateral uninstallation lower model tunnel section of jurisdiction warp measuring device |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910894783.5A CN110593895B (en) | 2019-09-20 | 2019-09-20 | Unilateral uninstallation lower model tunnel section of jurisdiction warp measuring device |
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| CN110593895A CN110593895A (en) | 2019-12-20 |
| CN110593895B true CN110593895B (en) | 2020-12-25 |
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| CN113686254B (en) * | 2021-08-13 | 2023-12-01 | 中铁第四勘察设计院集团有限公司 | Method and device for measuring surface expansion deformation of shield tunnel segment |
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| CN102434166A (en) * | 2011-11-24 | 2012-05-02 | 上海交通大学 | Device and method for testing influence of tunnel excavation on existing close-distance parallel tunnels |
| CN103117020B (en) * | 2013-02-20 | 2014-10-08 | 苏州科技学院 | Experimental facility for simulating shield tunnel dynamically boring causing ground loss and surface subsidence |
| CN105931559B (en) * | 2016-05-04 | 2018-09-21 | 河海大学 | 3D printing model tunnel and sand rain method model test producing device and construction method |
| CN105863734B (en) * | 2016-05-20 | 2017-10-10 | 天津大学 | Double track tunnel excavates existing tunnel simulation monitoring device |
| CN106370452B (en) * | 2016-11-21 | 2017-10-27 | 郑州大学 | A kind of multifunctional movable barricade experimental rig |
| CN108007760B (en) * | 2017-12-27 | 2023-07-25 | 西南交通大学 | Tunnel lining structure longitudinal mechanical special-type test device |
| CN108198504B (en) * | 2018-02-06 | 2024-03-01 | 北京交通大学 | Centrifugal test device for simulating multi-line shield crossing existing structure and test method thereof |
| CN108709977B (en) * | 2018-07-19 | 2024-03-01 | 浙江大学城市学院 | Indoor model test device and method for influencing existing subway tunnel by ground overload |
| CN109115530B (en) * | 2018-08-03 | 2020-06-30 | 中国矿业大学(北京) | System for transparent display and quantitative characterization of stress field of tunnel lining structure |
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Inventor after: Zhao Shiyong Inventor after: Li Chunying Inventor after: Huang Yongliang Inventor after: Wen Faqing Inventor after: Ji Bingbing Inventor after: Jin Junwei Inventor after: Li Yongmei Inventor after: Chen Hong Inventor after: Liu Yonghui Inventor after: Guo Yuancheng Inventor after: Li Mingyu Inventor after: Sun Liguang Inventor after: Tao Yunchao Inventor before: Jin Junwei Inventor before: Li Chunying Inventor before: Huang Yongliang Inventor before: Wen Faqing Inventor before: Ji Bingbing Inventor before: Li Yongmei Inventor before: Chen Hong Inventor before: Zhao Shiyong Inventor before: Liu Yonghui Inventor before: Guo Yuancheng Inventor before: Li Mingyu Inventor before: Sun Liguang Inventor before: Tao Yunchao |
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Address after: 6 / F, NO.666 Gonghe Xin Road, Jing'an District, Shanghai 200040 Patentee after: CHINA RAILWAY 15TH CONSTRUCTION BUREAU GROUP Co.,Ltd. Patentee after: URBAN RAIL TRANSIT ENGINEERING COMPANY LIMITED OF CHINA RAILWAY 15TH BUREAU Patentee after: Zhengzhou University Address before: No. 100, Kexue Avenue, high tech Development Zone, Zhengzhou City, Henan Province Patentee before: Zhengzhou University Patentee before: CHINA RAILWAY 15TH CONSTRUCTION BUREAU GROUP Co.,Ltd. Patentee before: URBAN RAIL TRANSIT ENGINEERING COMPANY LIMITED OF CHINA RAILWAY 15TH BUREAU |