CN110552711A - Variable cross-section tunnel excavation test device and test excavation method thereof - Google Patents
Variable cross-section tunnel excavation test device and test excavation method thereof Download PDFInfo
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- CN110552711A CN110552711A CN201910631265.4A CN201910631265A CN110552711A CN 110552711 A CN110552711 A CN 110552711A CN 201910631265 A CN201910631265 A CN 201910631265A CN 110552711 A CN110552711 A CN 110552711A
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- 238000009412 basement excavation Methods 0.000 title claims abstract description 73
- 238000012360 testing method Methods 0.000 title claims abstract description 36
- 238000000034 method Methods 0.000 title claims abstract description 31
- 239000002689 soil Substances 0.000 claims abstract description 37
- 230000008569 process Effects 0.000 claims abstract description 18
- 238000007599 discharging Methods 0.000 claims description 14
- 239000002699 waste material Substances 0.000 claims description 11
- 238000005086 pumping Methods 0.000 claims description 10
- 238000007569 slipcasting Methods 0.000 claims description 5
- 238000004140 cleaning Methods 0.000 claims description 4
- 229910000831 Steel Inorganic materials 0.000 claims description 3
- 239000010959 steel Substances 0.000 claims description 3
- 239000011435 rock Substances 0.000 abstract description 7
- 238000004088 simulation Methods 0.000 abstract description 3
- 238000010276 construction Methods 0.000 abstract description 2
- 238000005520 cutting process Methods 0.000 description 3
- 238000011160 research Methods 0.000 description 3
- 230000004075 alteration Effects 0.000 description 2
- 230000008859 change Effects 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 230000007613 environmental effect Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000010998 test method Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000008901 benefit Effects 0.000 description 1
- 230000008878 coupling Effects 0.000 description 1
- 238000010168 coupling process Methods 0.000 description 1
- 238000005859 coupling reaction Methods 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 238000004836 empirical method Methods 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000003825 pressing Methods 0.000 description 1
- 238000003860 storage Methods 0.000 description 1
- 230000001360 synchronised effect Effects 0.000 description 1
Classifications
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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
- E21D11/10—Lining with building materials with concrete cast in situ; Shuttering also lost shutterings, e.g. made of blocks, of metal plates or other equipment adapted therefor
- E21D11/105—Transport or application of concrete specially adapted for the lining of tunnels or galleries ; Backfilling the space between main building element and the surrounding rock, e.g. with concrete
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- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21D—SHAFTS; TUNNELS; GALLERIES; LARGE UNDERGROUND CHAMBERS
- E21D9/00—Tunnels or galleries, with or without linings; Methods or apparatus for making thereof; Layout of tunnels or galleries
- E21D9/10—Making by using boring or cutting machines
- E21D9/1006—Making by using boring or cutting machines with rotary cutting tools
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21D—SHAFTS; TUNNELS; GALLERIES; LARGE UNDERGROUND CHAMBERS
- E21D9/00—Tunnels or galleries, with or without linings; Methods or apparatus for making thereof; Layout of tunnels or galleries
- E21D9/10—Making by using boring or cutting machines
- E21D9/1093—Devices for supporting, advancing or orientating the machine or the tool-carrier
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N1/00—Sampling; Preparing specimens for investigation
- G01N1/02—Devices for withdrawing samples
- G01N1/04—Devices for withdrawing samples in the solid state, e.g. by cutting
- G01N1/08—Devices for withdrawing samples in the solid state, e.g. by cutting involving an extracting tool, e.g. core bit
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N33/00—Investigating or analysing materials by specific methods not covered by groups G01N1/00 - G01N31/00
- G01N33/24—Earth materials
Landscapes
- Engineering & Computer Science (AREA)
- Life Sciences & Earth Sciences (AREA)
- Mining & Mineral Resources (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geology (AREA)
- Environmental & Geological Engineering (AREA)
- Structural Engineering (AREA)
- Health & Medical Sciences (AREA)
- Chemical & Material Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Immunology (AREA)
- Analytical Chemistry (AREA)
- Biochemistry (AREA)
- General Health & Medical Sciences (AREA)
- General Physics & Mathematics (AREA)
- Physics & Mathematics (AREA)
- Pathology (AREA)
- Architecture (AREA)
- Medicinal Chemistry (AREA)
- Food Science & Technology (AREA)
- Remote Sensing (AREA)
- Civil Engineering (AREA)
- Excavating Of Shafts Or Tunnels (AREA)
Abstract
The invention relates to the field of laboratory simulation in the underground engineering construction process, in particular to an excavation test device for a variable cross-section tunnel and a test excavation method thereof. The invention solves the problem of continuous excavation of the variable cross-section tunnel and can ensure the stability of surrounding rocks in the excavation process. The method has important significance for researching the problems of deformation of surrounding soil and surface subsidence caused by variable cross-section tunnel excavation.
Description
Technical Field
The invention relates to the field of laboratory simulation of underground engineering construction processes, in particular to an excavation test device of a variable cross-section tunnel and a test excavation method thereof.
Background
With the continuous development of tunnel engineering technology, in order to adapt to various extreme conditions, various new tunnels emerge endlessly under the call of the green environmental protection concept, and energy tunnels, for example, become research objects of a plurality of scholars by taking full advantage of the environmental protection such as geothermal temperature. In order to adapt to the design concept of a novel tunnel, a new tunnel form of changing the size of the cross section of the tunnel is developed. How to realize the variable cross-section excavation of tunnel has important meaning to the problem that the excavation of variable cross-section tunnel arouses that the soil body is out of shape and the earth's surface subsides around, has also laid a foundation to the novel tunnel model test research of different cross-sectional forms, has wide application prospect.
The method for researching the relevant problems of tunnel excavation mainly comprises an empirical method, a model test method, a numerical simulation method and the like, wherein the model test method is most intuitive, but the method has less research on the excavation process of the variable cross-section tunnel at present, mainly solves the problem of how to ensure the continuity of the excavation process and the stability of surrounding rocks when the cross-section size is changed, and becomes the key for researching the model test of the excavation process of the variable cross-section tunnel.
Disclosure of Invention
the invention aims to solve the technical problem of providing the variable cross-section tunnel excavation test device and the test excavation method thereof, which can change the size of the excavation cross section at any time in the tunnel excavation process, continuously finish the excavation of the whole variable cross-section tunnel, ensure the stability of surrounding rocks in the excavation process and facilitate the implementation of subsequent test steps such as novel tunnel technology core facility installation and the like.
In order to solve the technical problems, the technical scheme of the invention is as follows: the utility model provides an excavation test device in variable cross section tunnel, goes out native pipe, fuselage, cutter, rotor, slip casting device and hydraulic pressure propeller including the spiral, the cutter is located the front end of fuselage, rotor one end is connected with the cutter, and the other end goes out native union coupling with the spiral, and cutter and spiral pipe of going out are through the rotor drive common work, and the spiral pipe of going out is arranged in the fuselage, evenly sets up four sets of slip casting devices at the fuselage front end, and the rear end sets up hydraulic pressure propeller, the cutter includes blade and spring button, and the blade is connected with spring button, and the folding of spring button steerable blade can realize multiple initial excavation diameter through the angle of rotatory folding blade.
The spiral soil outlet pipe is made by cutting a large-diameter twist drill.
The machine body is made of a steel pipe, is in an open state with the cutter connecting end, facilitates conveying of waste soil to the machine body, and is closed with the hydraulic propeller connecting end.
The cutter comprises eight blades and four spring buttons, wherein every two blades are connected through the spring buttons, and the spring buttons can control the folding of the blades at the top ends.
One end of the rotor is connected with the cutter, the other end of the rotor is connected with the spiral soil discharging pipe, and the cutter and the spiral soil discharging pipe are driven by the rotor to work together.
The grouting device comprises a grouting nozzle, a pumping pipe and a pump, wherein the grouting nozzle is fixed at the front end of the machine body and is positioned behind the cutter, the grouting nozzle and the machine body incline at an angle of 5-10 degrees, the vertical height of the highest point and the machine body is lower than the length of the cutter, one end of the pumping pipe is connected with the grouting nozzle, the other end of the pumping pipe is connected with the pump and is tightly attached to the machine body for fixation, and the pump is fixed at the tail of the machine body.
The experimental excavation method of the excavation testing device for the variable cross-section tunnel comprises the following concrete experimental operation steps:
(1) After the connection of all the parts is finished, the rotor is started to enable the cutter and the spiral soil discharging pipe to rotate, and the hydraulic propeller and the pump are started at the same time;
(2) The hydraulic propeller pushes the machine body, the cutter rotates to cut soil, the cut waste soil is conveyed to the machine body by the spiral soil outlet pipe to be stored, and the grouting device continuously performs grouting in the propelling process to prevent soil from collapsing;
(3) the extension and retraction of the cutter can be controlled through a spring button in the propelling process so as to achieve the purpose of variable-section excavation;
(4) and (4) dismantling the hydraulic propeller after the excavation is finished, carefully taking out the machine body, and cleaning waste soil in the machine body.
The invention has the following beneficial effects:
1. the blade can change the size of an excavation surface in the whole excavation process through two modes of stretching and folding, is remotely controlled, is convenient and easy to operate, and can realize variable cross-section excavation uninterruptedly in the whole tunnel propelling process;
2. The generated waste soil is stored in the propelling machine body along the spiral pipe, so that the subsequent cleaning is convenient;
3. In the excavation process of the tunnel, the tunnel is pushed forward and is simultaneously grouted in real time, so that the stability of surrounding rocks is ensured.
drawings
Fig. 1 is a front view of the excavation testing apparatus for a variable cross-section tunnel according to the present invention.
Fig. 2 is an internal view of the excavation testing apparatus for a variable cross-section tunnel according to the present invention.
fig. 3 is a right side view of the excavation testing apparatus for a variable cross-section tunnel according to the present invention.
Fig. 4 is a folding state diagram of a cutter of the excavation testing device for the variable cross-section tunnel according to the present invention.
Fig. 5 is a cutter stretching state diagram of the excavation testing device for the variable cross-section tunnel according to the present invention.
Labeled as: the device comprises a spiral soil discharging pipe 1, a machine body 2, a cutter 3, a rotor 4, a grouting device 5, a hydraulic propeller 6, a blade 7, a spring button 8, a grouting nozzle 9, a pumping pipe 10 and a pump 11.
Detailed Description
The invention will be further described with reference to the following drawings and specific embodiments.
Example 1
As shown in fig. 1 to 3, the excavation test device for a variable cross-section tunnel according to the present invention includes a spiral soil discharging pipe 1, a machine body 2, a cutter 3, a rotor 4, a grouting device 5, and a hydraulic thruster 6, and the specific structure and connection relationship are as follows:
rotor 4 one end is connected with cutter 3, and the other end is connected with spiral soil discharging pipe 1, and cutter 3 and spiral soil discharging pipe 1 pass through rotor 4 and drive the combined work. In fuselage 2 is arranged in to spiral soil discharging pipe 1, evenly set up four sets of slip casting devices 5 in 2 front ends of fuselage, the rear end sets up hydraulic propulsor 6, cutter 3 includes blade 7 and spring button 8, and blade 7 is connected with spring button 8, and the folding of the steerable blade 7 of spring button 8 can realize multiple initial excavation diameter through the angle of rotatory folding blade 7.
the spiral soil discharging pipe 1 is made by cutting a large-diameter twist drill.
The machine body 2 is made of a steel pipe, the connecting end of the machine body 2 and the cutter 3 is in an open state, waste soil is conveniently conveyed to the machine body 2, and the connecting end of the machine body 2 and the hydraulic propeller 6 is closed.
As shown in fig. 4 and 5, the cutter 3 includes eight blades 7 and four spring buttons 8, each two blades 7 are connected by the spring button 8, the spring buttons 8 can control the folding of the top blade, and the cutting diameter of the cutter 3 after folding is slightly larger than the width of the machine body 2.
the grouting device 5 is composed of a grouting nozzle 9, a pumping pipe 10 and a pump 11, wherein the grouting nozzle 9 is fixed at the front end of the machine body and is positioned behind the cutter, the grouting nozzle and the machine body are inclined at an angle of 5-10 degrees, the vertical height of the highest point and the machine body is lower than the length of the cutter, one end of the pumping pipe is connected with the grouting nozzle, the other end of the pumping pipe is connected with the pump and is tightly attached to the machine body for fixing, and the pump is fixed at the tail part of the machine.
the experimental excavation method of the excavation testing device for the variable cross-section tunnel comprises the following concrete experimental operation steps:
1. After the connection of all the parts is finished, the rotor 4 is started to enable the cutter 3 and the spiral soil discharging pipe 1 to rotate, and the hydraulic propeller 6 and the pump 11 are started at the same time;
2. The body 2 is pushed by the hydraulic propeller 6, the soil body is cut by the rotation of the cutter 3, the cut waste soil is sent to the body 2 by the spiral soil discharging pipe 1 for storage, and the grouting device 5 continuously performs grouting in the pushing process to prevent the soil body from collapsing;
3. The extension and retraction of the cutter can be controlled through the spring button 8 in the propelling process so as to achieve the purpose of variable-section excavation;
4. And (3) dismantling the hydraulic propeller 6 after the excavation is finished, carefully taking out the machine body 2, and cleaning waste soil in the machine body 2.
Example 2
This embodiment is an application example of the excavation testing apparatus and the excavation testing method for the variable cross-section tunnel according to the present invention,
In this example, the initial excavation diameter is set to 100mm, and the diameter of the cross section is changed to 120mm during excavation.
Preparing a tunnel excavation model box, and reserving an excavation opening.
The method comprises the steps of sequentially connecting all parts of the excavation testing device of the variable cross-section tunnel, pressing a spring button 8 of a cutter 3, adjusting the angle between the upper blade and a lower blade by rotating and folding the upper blade until the length of a connecting line between the top of the upper blade and the center of a rotor, namely the actual excavation diameter is 100mm, and fixing the blade through the spring button.
The device is arranged on the excavation side of a model box by a support frame, a cutter 3 is embedded in an excavation opening, a rotor 4 is started to enable the cutter 3 and a spiral soil outlet pipe 1 to rotate, after the rotation is stable, a hydraulic propeller 6 and a pump 11 are started to enable the device to stably propel towards the excavation direction, and meanwhile, the surrounding rock is grouted to prevent collapse, and the grouting speed and flow are properly adjusted according to the stable condition of the surrounding rock.
When the device is pushed to the position where the diameter needs to be enlarged to 120mm, the pushing is suspended, the rotor 4 stops rotating, the spring button 8 is opened through the remote control instrument to extend the cutter, the rotor 4 is started, and the device continues to be pushed forwards after the rotation is stable.
after the excavation is finished, the rotor 4 is closed to stop rotating, the device is kept stable by the supporting frame, the machine body 2 is pushed out of the model box by the continuous force application of the hydraulic propeller 6, and the machine body is opened to clean up waste soil.
In this example, only the initial excavation diameter is set to 100mm, and the present invention can also achieve various initial excavation diameters by adjusting the angles of the upper blade and the lower blade.
The variable cross-section tunnel excavation test device is easy in material acquisition, changes in the size of the excavation cross section are realized by controlling the extension of the cutter, convenience and rapidness are realized, the continuity of the excavation process can be ensured through remote control, the stability of surrounding rocks is ensured through synchronous grouting, the whole test device can be used for variable cross-section tunnel related tests, and the variable cross-section tunnel excavation test device has a wide application prospect.
The above description is only a preferred embodiment of the present invention, and not intended to limit the present invention, it should be noted that those skilled in the art and ordinary skill in the art can make various modifications and alterations without departing from the principle of the present invention, and these modifications and alterations should also be considered as the protection scope of the present invention.
Claims (7)
1. The utility model provides an excavation test device in variable cross section tunnel, includes spiral soil discharging pipe, fuselage, cutter, rotor, slip casting device and hydraulic pressure propeller, its characterized in that: the cutter is located the front end of fuselage, rotor one end is connected with the cutter, and the other end is connected with the spiral pipe that unearths, and cutter and spiral pipe that unearths drive the combined work through the rotor, and the spiral pipe that unearths evenly sets up four sets of slip casting devices in the fuselage front end, and the rear end sets up hydraulic propulsors, the cutter includes blade and spring button, and the blade is connected with spring button, and the folding of the steerable blade of spring button can realize multiple initial excavation diameter through the angle of rotatory folding blade.
2. the excavation test device of a variable cross-section tunnel of claim 1, wherein the spiral soil discharging pipe is cut by a large-diameter twist drill.
3. The excavation test device of a variable cross-section tunnel of claim 1, wherein the body is made of a steel pipe, and is in an open state with a cutter connecting end, so that waste soil is conveniently conveyed to the body, and the connecting end with the hydraulic thruster is closed.
4. The excavation testing apparatus of a variable cross-section tunnel of claim 1, wherein the cutter comprises eight blades and four spring buttons, and each two blades are connected by a spring button, and the spring buttons can control the folding of the top blade.
5. The excavation testing device of the variable cross-section tunnel of claim 1, wherein one end of the rotor is connected with a cutter, the other end of the rotor is connected with the spiral unearthing pipe, and the cutter and the spiral unearthing pipe are driven by the rotor to work together.
6. The excavation test device of a variable cross-section tunnel according to claim 1, wherein the grouting device is composed of a grouting nozzle, a pumping pipe and a pump, the grouting nozzle is fixed at the front end of the machine body and is positioned behind a cutter, the grouting nozzle is inclined at an angle of 5-10 degrees with the machine body, the highest point is vertical to the machine body and is lower than the cutter in length, one end of the pumping pipe is connected with the grouting nozzle, the other end of the pumping pipe is connected with the pump and is fixed to the machine body in a manner of being tightly attached to the machine body, and the pump is fixed at the tail.
7. the experimental excavation method of the excavation testing device for the variable cross-section tunnel according to claim 1, wherein the specific experimental operation steps are as follows:
(1) after the connection of all the parts is finished, the rotor is started to enable the cutter and the spiral soil discharging pipe to rotate, and the hydraulic propeller and the pump are started at the same time;
(2) The hydraulic propeller pushes the machine body, the cutter rotates to cut soil, the cut waste soil is conveyed to the machine body by the spiral soil outlet pipe to be stored, and the grouting device continuously performs grouting in the propelling process to prevent soil from collapsing;
(3) The extension and retraction of the cutter can be controlled through a spring button in the propelling process so as to achieve the purpose of variable-section excavation;
(4) And (4) dismantling the hydraulic propeller after the excavation is finished, carefully taking out the machine body, and cleaning waste soil in the machine body.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910631265.4A CN110552711B (en) | 2019-07-12 | 2019-07-12 | Variable cross-section tunnel excavation test device and test excavation method thereof |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201910631265.4A CN110552711B (en) | 2019-07-12 | 2019-07-12 | Variable cross-section tunnel excavation test device and test excavation method thereof |
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| Publication Number | Publication Date |
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| CN110552711A true CN110552711A (en) | 2019-12-10 |
| CN110552711B CN110552711B (en) | 2021-08-31 |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113898351A (en) * | 2021-09-23 | 2022-01-07 | 西南交通大学 | Special-shaped tunnel simulation excavating device |
| CN114487357A (en) * | 2022-04-18 | 2022-05-13 | 交通运输部天津水运工程科学研究所 | Modularized tunnel excavation simulation test device and assembling method thereof |
| CN117191470A (en) * | 2023-08-17 | 2023-12-08 | 爱智机器人(上海)有限公司 | Mineral powder sampler |
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| KR100557266B1 (en) * | 2003-03-13 | 2006-03-07 | 가부시키가이샤 고마쓰 세이사쿠쇼 | Soil remover for underground pipe layer |
| CN202882766U (en) * | 2012-11-16 | 2013-04-17 | 唐万金 | Expanding drill bit |
| CN104790873A (en) * | 2015-02-14 | 2015-07-22 | 河南理工大学 | Soft rock and soil layer jet flow guiding hole forming-chamfering-hole collapse preventing integrated drilling method |
| CN108489894A (en) * | 2018-05-30 | 2018-09-04 | 大连交通大学 | A kind of experimental rig and method for simulating karst area Shield Tunneling |
| CN208137857U (en) * | 2018-03-22 | 2018-11-23 | 阳谷昊泉机械有限公司 | A kind of reducing rotary drill tools |
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2019
- 2019-07-12 CN CN201910631265.4A patent/CN110552711B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
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| KR100557266B1 (en) * | 2003-03-13 | 2006-03-07 | 가부시키가이샤 고마쓰 세이사쿠쇼 | Soil remover for underground pipe layer |
| CN202882766U (en) * | 2012-11-16 | 2013-04-17 | 唐万金 | Expanding drill bit |
| CN104790873A (en) * | 2015-02-14 | 2015-07-22 | 河南理工大学 | Soft rock and soil layer jet flow guiding hole forming-chamfering-hole collapse preventing integrated drilling method |
| CN208137857U (en) * | 2018-03-22 | 2018-11-23 | 阳谷昊泉机械有限公司 | A kind of reducing rotary drill tools |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113898351A (en) * | 2021-09-23 | 2022-01-07 | 西南交通大学 | Special-shaped tunnel simulation excavating device |
| CN113898351B (en) * | 2021-09-23 | 2022-07-01 | 西南交通大学 | Special-shaped tunnel simulation excavation device and use method thereof |
| CN114487357A (en) * | 2022-04-18 | 2022-05-13 | 交通运输部天津水运工程科学研究所 | Modularized tunnel excavation simulation test device and assembling method thereof |
| CN117191470A (en) * | 2023-08-17 | 2023-12-08 | 爱智机器人(上海)有限公司 | Mineral powder sampler |
| CN117191470B (en) * | 2023-08-17 | 2024-03-15 | 爱智机器人(上海)有限公司 | Mineral powder sampler |
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| CN110552711B (en) | 2021-08-31 |
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