CN113484211A - Test device for simulating single-tube grouting behind shield segment wall - Google Patents
Test device for simulating single-tube grouting behind shield segment wall Download PDFInfo
- Publication number
- CN113484211A CN113484211A CN202110678284.XA CN202110678284A CN113484211A CN 113484211 A CN113484211 A CN 113484211A CN 202110678284 A CN202110678284 A CN 202110678284A CN 113484211 A CN113484211 A CN 113484211A
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- grouting
- box body
- test device
- fixed box
- shield segment
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- 238000012360 testing method Methods 0.000 title claims abstract description 23
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 27
- 239000002689 soil Substances 0.000 claims abstract description 21
- 238000007569 slipcasting Methods 0.000 claims abstract description 20
- 239000011440 grout Substances 0.000 claims abstract description 19
- 238000002347 injection Methods 0.000 claims abstract description 19
- 239000007924 injection Substances 0.000 claims abstract description 19
- 239000002002 slurry Substances 0.000 claims abstract description 19
- 238000004088 simulation Methods 0.000 claims abstract description 10
- 229910000831 Steel Inorganic materials 0.000 claims description 6
- 239000010959 steel Substances 0.000 claims description 6
- 230000007306 turnover Effects 0.000 claims description 3
- 238000009792 diffusion process Methods 0.000 abstract description 18
- 238000000034 method Methods 0.000 abstract description 14
- 230000001360 synchronised effect Effects 0.000 abstract description 14
- 230000008569 process Effects 0.000 abstract description 13
- 239000007787 solid Substances 0.000 abstract description 4
- 230000009286 beneficial effect Effects 0.000 abstract description 2
- 239000007788 liquid Substances 0.000 description 12
- 230000000694 effects Effects 0.000 description 5
- 238000011160 research Methods 0.000 description 4
- 230000002349 favourable effect Effects 0.000 description 3
- 239000000243 solution Substances 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 2
- 230000007246 mechanism Effects 0.000 description 2
- 239000011435 rock Substances 0.000 description 2
- 238000010276 construction Methods 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- -1 grouting pressure Substances 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000002787 reinforcement Effects 0.000 description 1
- 238000005728 strengthening Methods 0.000 description 1
- 230000005641 tunneling Effects 0.000 description 1
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Classifications
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N15/00—Investigating characteristics of particles; Investigating permeability, pore-volume, or surface-area of porous materials
- G01N15/08—Investigating permeability, pore-volume, or surface area of porous materials
- G01N15/082—Investigating permeability by forcing a fluid through a sample
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N13/00—Investigating surface or boundary effects, e.g. wetting power; Investigating diffusion effects; Analysing materials by determining surface, boundary, or diffusion effects
- G01N13/04—Investigating osmotic effects
Abstract
The invention relates to the technical field of tunnel engineering, in particular to a test device for simulating single-pipe grouting behind a shield segment wall, which comprises: fixed box and slidable nestification are equipped with the slip casting hole that is used for the grout in the mobile box's removal box in the fixed box, the side of removing the box, and fixed box top is equipped with the water injection hole, and the water injection hole inserts in the mobile box. The slurry enters a soil body (solid medium) in the movable box body through the grouting holes and is solidified, the speed of the motor which is drawn out of the movable box body is adjusted according to the increase of the volume of the slurry, and then the synchronous grouting process simulation is completed. Compared with the traditional synchronous grouting simulation device which simulates the process of driving from the shield shell to the outside soil body while grouting, the scheme is more emphatic and beneficial to simulating the diffusion condition of the slurry after the grouting of the segment wall is finished, and has important significance for exploring the slurry diffusion rule after the grouting of the segment.
Description
Technical Field
The invention relates to the technical field of tunnel engineering, in particular to a test device for simulating single-pipe grouting behind a shield segment wall.
Background
When the synchronous grouting is shield tunneling, the shield can work while forming a gap behind the forward propulsion segment of the shield through the synchronous grouting system and the grouting pipe at the tail of the shield. Synchronous grouting fills the duct piece closely within a very short time of forming a gap behind the duct piece, so that surrounding rock masses are supported timely, collapse of the rock masses can be effectively prevented, and settlement of the earth surface is controlled.
Compared with the continuous development of grouting construction technology, the grouting diffusion strengthening mechanism research is relatively lagged. At present, the grouting effect still depends on an empirical technology, the research on the permeation diffusion rule of grouting slurry is less, the conventional slurry diffusion reinforcement theoretical formula is far from mature, and part of empirical formulas are summarized aiming at certain specific slurry and are not representative.
The single-pipe grouting is characterized in that only one grouting hole is arranged behind the pipe piece wall for grouting, the research on the flow diffusion mechanism of the grouting liquid in the injected medium after the single-pipe grouting is relatively simple, the single-pipe grouting has guiding significance for actual engineering, and a test device for simulating the influence of the grouting liquid, grouting pressure, water and soil pressure and the like of the single-pipe grouting on the grouting effect is absent at present.
Disclosure of Invention
The invention provides a test device for simulating single-pipe grouting behind a shield segment wall, which solves the technical problem that the grouting effect only depends on experience.
The invention provides a test device for simulating single-tube grouting after shield segment wall, which comprises: but fixed box and slidable nestification in the internal removal box of fixed box, the side of removing the box is equipped with the injected hole that is used for the grout, fixed box top is equipped with the water injection hole, the water injection hole inserts in the removal box.
Preferably, the top of the fixed box body and the top of the movable box body are both in an open state, a detachable cover plate is arranged on the fixed box body, and the water injection hole is located in the cover plate.
Preferably, a rotating shaft is arranged at the upper end of the side wall of the fixed box body, and the cover plate is connected with the side wall in a turnover mode through the rotating shaft.
Preferably, a track is fixedly arranged below the fixed box body, a gear and a motor are fixedly arranged on the movable box body, the gear is meshed with the track, and the motor drives the gear to rotate so as to drive the movable box body and the fixed box body to slide relatively.
Preferably, the side of the movable box body is provided with a plurality of annularly arranged grouting holes.
Preferably, the device still includes air compressor machine and thick liquid pond, slip casting hose is connected to the injected hole outside, and air compressor machine and thick liquid pond are connected to another end of slip casting hose.
Preferably, a soil body is arranged in the movable box body, and the slurry meets the soil body and is solidified.
Preferably, the inner side of the grouting hole is connected with a grouting steel pipe.
Has the advantages that: the invention provides a test device for simulating single-tube grouting behind a shield segment wall, which comprises: but fixed box and slidable nestification in the internal removal box of fixed box, the side of removing the box is equipped with the injected hole that is used for the grout, fixed box top is equipped with the water injection hole, the water injection hole inserts in the removal box. During grouting, high-pressure air is injected into the grouting pipe by the air compressor, grout in the grout pool is sucked by the internal and external pressure difference, the grout enters a soil body (solid medium) in the movable box body through the grouting holes in the grouting pipe and is solidified, the speed of the motor for drawing out the movable box body is adjusted according to the increasing speed of the volume of the grout, and therefore synchronous grouting process simulation is completed. After the test is completed, the cover plate of the fixed box body can be opened, so that the soil body can be conveniently sliced, and the grouting diffusion effect can be observed. The mode that adopts fixed box and removal box to combine takes out the removal box according to the injected quantity, compares with the process that traditional synchronous slip casting analogue means simulation was tunneled from "shield casing" to outside soil body limit slip casting, and this scheme is more emphatic and is favorable to simulating the diffusion condition of section of jurisdiction post grouting completion back thick liquid, has the significance to the thick liquid diffusion law of the section of jurisdiction post grouting back of the exploration.
The foregoing description is only an overview of the technical solutions of the present invention, and in order to make the technical solutions of the present invention more clearly understood and to implement them in accordance with the contents of the description, the following detailed description is given with reference to the preferred embodiments of the present invention and the accompanying drawings. The detailed description of the present invention is given in detail by the following examples and the accompanying drawings.
Drawings
The accompanying drawings, which are included to provide a further understanding of the invention and are incorporated in and constitute a part of this application, illustrate embodiment(s) of the invention and together with the description serve to explain the invention without limiting the invention. In the drawings:
FIG. 1 is a schematic structural diagram of a test device for simulating single-tube grouting behind a shield segment wall according to the invention.
Description of reference numerals: 11-fixing the box body; 12-moving the box body; 13-a rotating shaft; 21-a motor; 22-a rotating gear; 31-a track; 41-grouting flexible pipe; 42-grouting the steel pipe; 43-grouting holes; 51-an air compressor; 61-slurry pond; 71-water injection pipe.
Detailed Description
The principles and features of this invention are described below in conjunction with the following drawings, which are set forth by way of illustration only and are not intended to limit the scope of the invention. The invention is described in more detail in the following paragraphs by way of example with reference to the accompanying drawings. Advantages and features of the present invention will become apparent from the following description and from the claims. It is to be noted that the drawings are in a very simplified form and are not to precise scale, which is merely for the purpose of facilitating and distinctly claiming the embodiments of the present invention.
It will be understood that when an element is referred to as being "secured to" another element, it can be directly on the other element or intervening elements may also be present. When a component is referred to as being "connected" to another component, it can be directly connected to the other component or intervening components may also be present. When a component is referred to as being "disposed on" another component, it can be directly on the other component or intervening components may also be present. The terms "vertical," "horizontal," "left," "right," and the like as used herein are for illustrative purposes only.
Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. The terminology used in the description of the invention herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. As used herein, the term "and/or" includes any and all combinations of one or more of the associated listed items.
As shown in fig. 1, the invention provides a test device for simulating single-tube grouting after shield segment wall, comprising: fixed box 11 and slidable nestification in the removal box 12 in the fixed box 11, the side of removing box 12 is equipped with the slip casting hole 43 that is used for the grout, fixed box 11 top is equipped with the water injection hole, the water injection hole inserts in the removal box 12. During grouting, high-pressure air is injected into the grouting pipe by the air compressor 51, grout in the grout pool 61 is sucked by internal and external pressure difference, the grout enters a soil body (solid medium) in the movable box body 12 through the grouting holes 43 in the grouting pipe and is solidified, the speed of the motor 21 which is drawn out of the movable box body 12 is adjusted according to the increasing speed of the volume of the grout, and therefore simulation of the synchronous grouting process is completed, set water pressure is added to the top plate of the fixed box body 11 according to needs, and the synchronous grouting process of an underwater tunnel at different water pressures is simulated. After the test is completed, the cover plate of the fixed box body 11 can be opened, so that the soil body can be conveniently sliced, and the grouting diffusion effect can be observed. The mode that adopts fixed box 11 and removal box 12 to combine is taken out removal box 12 according to the injected amount, compares with the process that traditional synchronous slip casting analogue means simulation was tunneled from "shield casing" to outside soil body limit slip casting, and this scheme is more emphatic and is favorable to simulating the diffusion condition of section of jurisdiction wall post grouting completion back thick liquid, has the significance to the thick liquid diffusion law of the section of jurisdiction post grouting back of the foundation of the fields of China.
Preferably, the top of the fixed box body 11 and the top of the movable box body 12 are both in an open state, a detachable cover plate is arranged on the fixed box body 11, and the water injection hole is located on the cover plate. Adopt semi-open box, can follow the top and open the apron, be convenient for carry out the section or further research to the slip casting soil body after the experiment, can audio-visual observation thick liquid diffusion form, the apron is equipped with the water injection hole, and adjustable box water pressure realizes simulating single-pipe slip casting process under different stratum, different water pressures.
Preferably, a rotating shaft 13 is arranged at the upper end of the side wall of the fixed box body 11, and the cover plate is connected with the side wall in a turnover mode through the rotating shaft 13. The rotating shaft 13 is convenient to open and close and convenient to use.
Preferably, a track 31 is fixedly arranged below the fixed box body 11, a gear and a motor 21 are fixedly arranged on the movable box body 12, the gear is engaged with the track 31, and the motor 21 drives the gear to rotate so as to drive the movable box body 12 and the fixed box body 11 to slide relatively. The mode that adopts fixed box 11 and removal box 12 to combine, according to the rotational speed of slip casting control motor 21 in order to take out removal box 12 in step, compare with the process that traditional synchronous slip casting analogue means simulation was tunneled from "shield casing" to outside soil body while slip casting, more the side weight and be favorable to simulating the diffusion condition of the thick liquid after the slip casting completion of section of jurisdiction wall, have the significance to the thick liquid diffusion rule after the section of jurisdiction slip casting.
Preferably, the side of the movable box 12 is provided with a plurality of annularly arranged injection holes 43. The device also comprises an air compressor 51 and a slurry pool 61, wherein the outer side of the grouting hole 43 is connected with the grouting hose 41, and the other end of the grouting hose 41 is connected with the air compressor 51 and the slurry pool 61. Soil is arranged in the movable box body 12, and the slurry meets the soil and is solidified.
Preferably, the inner side of the grouting hole 43 is connected with a grouting steel pipe 42. The outer side is connected with an air compressor 51 and a slurry pool 61 through a grouting hose 41, and the inner side is injected with slurry through a grouting steel pipe 42, so that the slurry can be fixedly discharged into any point of the movable box body 12.
In one particular implementation scenario, the mobile soil box includes a stationary box body 11 and a mobile box body 12. Fixed box 11 is the cuboid case, lacks the curb plate of minor face one side, and the apron of top surface can be opened along long limit, and the apron is close to one side of pivot 13 and is equipped with water injection pipe 71. The movable box body 12 is nested inside the fixed box body 11, lacks the sliding access of short side one side from the fixed box body 11, and is the cuboid box together, lacks the curb plate of roof and short side one side, and the curb plate that lacks is just relative with the curb plate that the fixed box body lacked. Two motors 21 are installed at the lower part of the side plate of the movable box body 12 close to the outer side, and are fixedly installed at symmetrical positions, and the motors 21 are provided with rotating gears 22. Two tracks 31 with gears are arranged below the fixed box body 11 in the long side direction, the tracks 31 correspond to the motor 21 up and down, the rotating gear 22 of the motor 21 is meshed with the tracks 31, and the top surface of the tracks 31 is lower than the plane height of the floor of the fixed box body 11, namely the whole fixed box body 11 is arranged above the tracks 31. In operation, the motor 21 causes the movable housing 12 to move in the direction outside the fixed housing 11 by means of gear rotation. Move the motor 21 top of the outside curb plate of box 12 and still be equipped with 10 injected hole 43 that the annular was evenly arranged to and curb plate central point puts and arranges an injected hole 43, in operation, set up the injected hole position, at injected hole 43 box inboard installation slip casting steel pipe 42, the injected hole 43 that does not carry out the slip casting adopts the end cap shutoff, injected hole 43 outside access slip casting hose 41, air compressor machine 51 and thick liquid pond 61 are inserted to another of slip casting hose 41, concrete theory of operation is as follows:
during grouting, high-pressure air is injected into the grouting hose 41 by the air compressor 51, grout in the grout pool 61 is sucked by the internal and external pressure difference, the grout enters a soil body (solid medium) in the movable box body 12 through the grouting holes 43 in the grouting hose 41 and is solidified, the speed of the motor 21 which is drawn out of the movable box body 12 is adjusted according to the increasing speed of the volume of the grout, namely, simulation of the synchronous grouting process is completed, set water pressure is added to the cover plate of the fixed box body 11 through the water injection holes 71 as required, and the synchronous grouting process of an underwater tunnel at different water pressures is simulated.
The advantages over the prior art are mainly reflected in:
(1) according to the test device for simulating single-pipe grouting behind the segment wall of the shield, the movable box body is drawn out according to the grouting amount in a mode of combining the fixed box body and the movable box body, compared with a traditional synchronous grouting simulation device which simulates the process of driving from a shield shell to an external soil body while grouting, the test device is more emphasized, is beneficial to simulating the diffusion condition of the grout after segment wall grouting is completed, and has important significance for detecting the grout diffusion rule after segment grouting.
(2) The test device for simulating single-pipe grouting behind the shield segment wall, provided by the invention, has the advantages that the cover plate at the top can be opened by the box body, so that the tested grouting soil body can be conveniently sliced or further researched, the slurry diffusion form can be visually observed, the water injection hole is formed in the cover plate, the water pressure of the box body can be adjusted, and the single-pipe grouting process under different strata and different water pressures can be simulated.
The foregoing is merely a preferred embodiment of the invention and is not intended to limit the invention in any manner; the present invention may be readily implemented by those of ordinary skill in the art as illustrated in the accompanying drawings and described above; however, those skilled in the art should appreciate that they can readily use the disclosed conception and specific embodiments as a basis for designing or modifying other structures for carrying out the same purposes of the present invention without departing from the scope of the invention as defined by the appended claims; meanwhile, any changes, modifications, and evolutions of the equivalent changes of the above embodiments according to the actual techniques of the present invention are still within the protection scope of the technical solution of the present invention.
Claims (8)
1. The utility model provides a test device of single tube slip casting behind simulation shield structure section of jurisdiction wall which characterized in that includes: but fixed box and slidable nestification in the internal removal box of fixed box, the side of removing the box is equipped with the injected hole that is used for the grout, fixed box top is equipped with the water injection hole, the water injection hole inserts in the removal box.
2. The test device for simulating single-tube grouting behind a shield segment wall according to claim 1, wherein the tops of the fixed box body and the movable box body are both in an open state, a detachable cover plate is arranged on the fixed box body, and the water injection hole is positioned on the cover plate.
3. The test device for simulating single-tube grouting behind a shield segment wall according to claim 2, characterized in that a rotating shaft is arranged at the upper end of the side wall of the fixed box body, and the cover plate is connected with the side wall in a turnover manner through the rotating shaft.
4. The test device for simulating single-tube grouting behind a shield segment wall according to claim 1, wherein a track is fixedly arranged below the fixed box body, a gear and a motor are fixedly arranged on the movable box body, the gear is meshed with the track, and the motor drives the gear to rotate so as to drive the movable box body and the fixed box body to slide relatively.
5. The test device for simulating single-pipe grouting behind a shield segment wall according to claim 1, wherein a plurality of annularly-arranged grouting holes are formed in the side edge of the movable box body.
6. The test device for simulating single-tube grouting behind a shield segment wall according to claim 1, characterized in that the device further comprises an air compressor and a slurry pool, a grouting hose is connected to the outer side of the grouting hole, and the other end of the grouting hose is connected to the air compressor and the slurry pool.
7. The test device for simulating single-pipe grouting behind a shield segment wall according to claim 6, wherein a soil body is arranged in the movable box body, and the slurry meets the soil body and is solidified.
8. The test device for simulating single-pipe grouting behind a shield segment wall according to claim 1, wherein a grouting steel pipe is connected to the inner side of the grouting hole.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110678284.XA CN113484211A (en) | 2021-06-18 | 2021-06-18 | Test device for simulating single-tube grouting behind shield segment wall |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110678284.XA CN113484211A (en) | 2021-06-18 | 2021-06-18 | Test device for simulating single-tube grouting behind shield segment wall |
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| Publication Number | Publication Date |
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| CN113484211A true CN113484211A (en) | 2021-10-08 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202110678284.XA Pending CN113484211A (en) | 2021-06-18 | 2021-06-18 | Test device for simulating single-tube grouting behind shield segment wall |
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Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN202578708U (en) * | 2012-03-13 | 2012-12-05 | 湖北省产品质量监督检验研究院 | Effectiveness evaluation simulation device for shield tunnel synchronous grouting in soft foundation dynamic water stratum |
| CN105628335A (en) * | 2015-12-29 | 2016-06-01 | 上海隧道工程有限公司 | Quasi-rectangular shield synchronous grouting test equipment |
| CN205643289U (en) * | 2016-04-21 | 2016-10-12 | 同济大学 | Synchronous slip casting analogue test system of shield tunnel |
| CN107831073A (en) * | 2017-11-02 | 2018-03-23 | 中山大学 | Shield-tunneling construction synchronous grouting experimental rig and test method |
| CN211877918U (en) * | 2020-01-17 | 2020-11-06 | 中铁四院集团西南勘察设计有限公司 | Test device for simulating shield tunnel grouting |
| CN212433171U (en) * | 2020-06-02 | 2021-01-29 | 北京市轨道交通建设管理有限公司 | Shield grouting test device |
| CN215574519U (en) * | 2021-06-18 | 2022-01-18 | 中铁第四勘察设计院集团有限公司 | Test device for simulating single-tube grouting behind shield segment wall |
-
2021
- 2021-06-18 CN CN202110678284.XA patent/CN113484211A/en active Pending
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN202578708U (en) * | 2012-03-13 | 2012-12-05 | 湖北省产品质量监督检验研究院 | Effectiveness evaluation simulation device for shield tunnel synchronous grouting in soft foundation dynamic water stratum |
| CN105628335A (en) * | 2015-12-29 | 2016-06-01 | 上海隧道工程有限公司 | Quasi-rectangular shield synchronous grouting test equipment |
| CN205643289U (en) * | 2016-04-21 | 2016-10-12 | 同济大学 | Synchronous slip casting analogue test system of shield tunnel |
| CN107831073A (en) * | 2017-11-02 | 2018-03-23 | 中山大学 | Shield-tunneling construction synchronous grouting experimental rig and test method |
| CN211877918U (en) * | 2020-01-17 | 2020-11-06 | 中铁四院集团西南勘察设计有限公司 | Test device for simulating shield tunnel grouting |
| CN212433171U (en) * | 2020-06-02 | 2021-01-29 | 北京市轨道交通建设管理有限公司 | Shield grouting test device |
| CN215574519U (en) * | 2021-06-18 | 2022-01-18 | 中铁第四勘察设计院集团有限公司 | Test device for simulating single-tube grouting behind shield segment wall |
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