CN110195596A - A kind of model test earth pressure balanced push-bench analogy method and constructional device - Google Patents
A kind of model test earth pressure balanced push-bench analogy method and constructional device Download PDFInfo
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- CN110195596A CN110195596A CN201910478836.5A CN201910478836A CN110195596A CN 110195596 A CN110195596 A CN 110195596A CN 201910478836 A CN201910478836 A CN 201910478836A CN 110195596 A CN110195596 A CN 110195596A
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- 238000012360 testing method Methods 0.000 title claims abstract description 45
- 238000000034 method Methods 0.000 title claims abstract description 32
- 239000002689 soil Substances 0.000 claims abstract description 66
- 238000010276 construction Methods 0.000 claims abstract description 24
- 230000005540 biological transmission Effects 0.000 claims abstract description 16
- 229910052571 earthenware Inorganic materials 0.000 claims abstract description 9
- 230000005641 tunneling Effects 0.000 claims abstract description 8
- 238000003756 stirring Methods 0.000 claims description 35
- 238000009412 basement excavation Methods 0.000 claims description 22
- 230000011218 segmentation Effects 0.000 claims description 8
- 238000013456 study Methods 0.000 abstract description 8
- 241001412024 Heterotaxis Species 0.000 abstract description 4
- 238000002474 experimental method Methods 0.000 abstract description 4
- 210000002683 foot Anatomy 0.000 description 23
- 238000004088 simulation Methods 0.000 description 8
- 238000013461 design Methods 0.000 description 3
- 238000010586 diagram Methods 0.000 description 3
- 238000006073 displacement reaction Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 239000000203 mixture Substances 0.000 description 2
- 238000012544 monitoring process Methods 0.000 description 2
- 238000011160 research Methods 0.000 description 2
- 229910000831 Steel Inorganic materials 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000006378 damage Effects 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 230000018109 developmental process Effects 0.000 description 1
- 230000000149 penetrating effect Effects 0.000 description 1
- 238000002360 preparation method Methods 0.000 description 1
- 230000003068 static effect Effects 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 238000003466 welding Methods 0.000 description 1
Classifications
-
- 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
-
- 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
- E21D9/12—Devices for removing or hauling away excavated material or spoil; Working or loading platforms
- E21D9/124—Helical conveying means therefor
Landscapes
- Engineering & Computer Science (AREA)
- Mining & Mineral Resources (AREA)
- Environmental & Geological Engineering (AREA)
- Life Sciences & Earth Sciences (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Geology (AREA)
- Excavating Of Shafts Or Tunnels (AREA)
Abstract
It than ruler physical experiments technical field is a kind of earth pressure balanced push-bench constructional device of model test for the geomechanical model test in geotechnical engineering the present invention relates to push pipe tunneling construction process is big.Including shell, cutter tip, soil output；The front end of the push-bench constructional device is arranged in cutter tip；Cutter tip includes excavating blade foot, excavates blade foot in a ring, the inclined face in front end；Shell is connect with the cutter tip that front end is arranged；Soil output is located inside shell latter half, and soil output includes earthenware shell, helical blade and transmission shaft；Transmission shaft is connect with helical blade, which drives helical blade rotation.The application structure is simple, easy to use, lays the foundation for the correlation models experimental study such as heterotaxis, soil pressure variation and section of jurisdiction stress condition in pipe jacking tunnel work progress.
Description
Technical field
It is big than ruler physical experiments technical field that the present invention relates to push pipe tunneling construction processes, in geotechnical engineering
Geomechanical model test is a kind of model test earth pressure balanced push-bench analogy method and constructional device.
Background technique
With the development of society and increasing rapidly for the density of population, people are also adding the paces of Urban Underground Space Excavation
Fastly, and principal mode that rail traffic, city piping lane and underground electric pipe network etc. are utilized as Urban Underground Space Excavation, often
It often needs to pass through to build (structure) and build compact district.It is constructed due to traditional Open Cut Method and is severely limited in these regions, adopted
It is known as trend and certainty with to ground and all relatively small excavating construction method of surrounding environment influence.Wherein, push bench process is because of it
Do not block the traffic, welding, noise be not few, pollution is few, on surrounding resident influence it is smaller, while excavated volume is small, work surface is small,
The advantages such as the construction period is short, overall cost is low become a kind of relatively common and important excavating construction method.
Certain influence can be also generated since jacking construction process is complex, and to the construction of structures of surrounding cities, because
Related scholar has also carried out some correlative studys both at home and abroad for this.
It is presently considered the tunneling construction process of front end push-bench, carries out in the associated chamber of construction by pipeline jacking method or model test is ground
Study carefully less, not yet considers the influence of excavation construction process in minority test.Therefore it is big than ruler physical model to explore construction by pipeline jacking method
The new method of test researches and develops its corresponding experimental rig, establishes its applicable monitoring system and method, accounts for push-bench pick
Into the analysis of construction by pipeline jacking method process simulation, study the space displacement feature and stress variation situation on stratum in its work progress,
It has great theoretical and practical significance.
Summary of the invention
The purpose of the application is to design that a kind of structure is simple, Excavation simulation device easy to use, passes through and carries out pipe jacking tunnel
The simulation that the processes such as soil and dregs output are tunneled, cut in construction uses, and is heterotaxis, soil pressure in pipe jacking tunnel work progress
The correlation models experimental study such as variation and section of jurisdiction stress condition lays the foundation.
To achieve the goals above, present invention employs following technical solutions:
A kind of earth pressure balanced push-bench constructional device of model test, including, shell, cutter tip, soil output；
The model test front end of earth pressure balanced push-bench constructional device is arranged in the cutter tip, to cut the soil body；
The cutter tip includes excavating blade foot, and in a ring, the inclined face in front end, the excavation blade foot is to push up for the excavation blade foot
Into cutting the soil body in the process；The shell is connect with the cutter tip that front end is arranged, to support the soil body after excavating not
It collapses and provides working space for soil output helical feed；The soil output is located inside shell latter half, institute
Stating soil output includes earthenware shell, helical blade and transmission shaft；The transmission shaft is connect with helical blade, the transmission shaft
Drive helical blade rotation；The soil output is to be delivered to push-bench model rear for the soil body of cutting.
Further, the cutter tip further includes segmentation blade foot, and the segmentation blade foot is provided with horizontal and vertical direction
A plurality of blade foot is arranged, to the soil body piecemeal that excavation blade foot is cut.
Further, it is provided with correcting error guidance hole among the bottommost for excavating blade foot, to correct the model test
It is shifted in earth pressure balanced push-bench constructional device tunneling process.
Further, the correcting error guidance hole is perforative is arranged on the housing wall.
Further, the leading portion of the shell has been arranged radially native storehouse rear wall, before the soil storehouse rear wall and the shell
Duan Gongtong surrounds the stirring Tu Cang, the soil body that the stirring Tu Cang is cut to accommodate the cutter tip.
Further, the stirring Tu Cang is provided with blender, and the blender is laggard to cut the cutter tip
Enter to stir the soil body rotation stirring of Tu Cang to fluffy and fall into the native orlop portion of stirring.
Further, opening identical with the soil output size, the spiral are provided on the native storehouse rear wall
Earthenware front end is connect with the opening of the native storehouse rear wall out；And the transmission shaft is connect by opening with the blender, the biography
Moving axis drives blender rotation.
Further, the blender is from five to the inclined stirring bar construction of excavation face.
Further, it is provided with metallic channel on the shell, the metallic channel is to by the model test earth pressure balance
The cable of formula push-bench constructional device and the conducting wire of sensor are drawn.
Further, the shell is identical as the cross-sectional sizes of the cutter tip.
Compared with prior art, the beneficial effects of the present invention are: the design structure is simple, is easily installed, is easy to operate, and
And push-bench excavating device cable, sensor equisignal line safety in the construction process can be protected.And it is oriented to according to excavating
The needs of positioning are designed correcting error guidance hole, the principle of straight line are determined using two o'clock, guarantee jacking by flexible wire ropes
It does not shift in journey.The design of model is dug in the test of this open model with earth pressure balanced push-bench constructional device, can be used for pushing up
Pipe tunneling construction process is big than ruler physical experiments, by tunnel in pipe jacking tunnel construction, cutting soil and dregs output etc.
The simulation of process uses, and is the relevant modes such as heterotaxis in pipe jacking tunnel work progress, soil pressure variation and section of jurisdiction stress condition
Type experimental study lays the foundation.
Detailed description of the invention
Fig. 1 is the earth pressure balanced push-bench constructional device overall schematic of model test of the invention；
Fig. 2 is the earth pressure balanced push-bench constructional device sectional view of model test of the invention；
Fig. 3 is cutter tip schematic diagram of the invention；
Fig. 4 is that shell and stirring Tu Cang of the invention constitute schematic diagram；
Fig. 5 is soil output composition and operation principle schematic diagram of the invention.
In figure:
1 shell
2 excavate blade foot
3 segmentation blade foots
4 metallic channels
5 correcting error guidance holes
6 blenders
7 native storehouse rear walls
8 helical blades
9 transmission shafts
10 go out earthenware shell.
Specific embodiment
Following will be combined with the drawings in the embodiments of the present invention, and technical solution in the embodiment of the present invention carries out clear, complete
Site preparation description, it is clear that described embodiments are only a part of the embodiments of the present invention, instead of all the embodiments.It is based on
Embodiment in the present invention, it is obtained by those of ordinary skill in the art without making creative efforts every other
Embodiment shall fall within the protection scope of the present invention.
This application discloses a kind of earth pressure balanced push-bench constructional devices of model test, including, shell, bite
Head, stirring Tu Cang, soil output.
The model test front end of earth pressure balanced push-bench constructional device, bite is arranged in the cutter tip
Head is to cut the soil body；The cutter tip include excavate blade foot 2 and segmentation blade foot 3, the excavation blade foot 2 in a ring, before
Inclined face is held, the excavation blade foot 2 in jack-in process to cut the soil body；The segmentation blade foot 3 is provided with horizontally and vertically
A plurality of blade foot is arranged in direction, to the soil body piecemeal that excavation blade foot 2 is cut.
It is provided with metallic channel 4 on the shell 1, the metallic channel 4 is to by the earth pressure balanced push pipe of the model test
The cable of machine constructional device and the conducting wire of sensor are drawn.Further, it is provided with and entangles among the bottommost for excavating blade foot 2
Inclined pilot hole 5, is shifted to correct the model test in earth pressure balanced push-bench constructional device tunneling process.It is described
Correcting error guidance hole 5 is perforative to be arranged on 1 wall of shell.
The shell 1 is connect with the cutter tip that front end is arranged, and the section of the shell and the cutter tip is big
It is small identical, soil output is set inside 1 latter half of shell.
The soil output is located inside 1 latter half of shell, and the soil output includes earthenware shell 10, spiral shell
Vane piece 8 and transmission shaft 9；The transmission shaft 9 is connect with helical blade 8, which drives helical blade 8 to rotate；The spiral shell
Earthenware is screwed out the soil body of cutting is delivered to push-bench model rear.
The leading portion of the shell 1 has been arranged radially native storehouse rear wall 7, and soil storehouse rear wall 7 is common with the leading portion of the shell 1
Surround the stirring Tu Cang, the soil body that the stirring Tu Cang is cut to accommodate the cutter tip.The stirring Tu Cang setting
There is a blender 6, the blender 6 is from five to the inclined stirring bar construction of excavation face, and the blender 6 is to by the bite
Head enters the soil body rotation stirring of stirring Tu Cang to fluffy and fall into the native orlop portion of stirring after cutting.On soil storehouse rear wall 7
It is provided with opening identical with the soil output size, the opening of the soil output front end and the native storehouse rear wall 7
Connection；And the transmission shaft 9 is connect by opening with the blender 6, which drives blender 6 to rotate.
In conjunction with attached drawing, the earth pressure balanced push-bench constructional device component part of model test: cutter tip, stirring soil
Storehouse, shell, four part of soil output.
Cutter tip: being located at model test earth pressure balanced push-bench constructional device front end, by excavation blade foot and divides
Cut blade foot composition.Excavate blade foot in a ring, there is correcting error guidance hole in the inclined face in front end among bottommost；It is horizontal to divide blade foot
It is a plurality of with vertical direction arrangement, to the soil body piecemeal that excavation blade foot is cut, convenient for blender by soil shear failure in native storehouse
It is extremely fluffy.
Shell and stirring Tu Cang: shell is connect with front end cutter tip, and the two cross-sectional sizes are identical, the soil after support excavation
Body does not collapse while providing working space for soil shear failure and helical feed；As shown, native storehouse rear wall and its leading portion housing section
Point surround stirring Tu Cang jointly, inside is equipped with blender, and blender is from five to the inclined stirring bar construction of excavation face, bite
Head enters stirring Tu Cang after cutting soil body segmentation, is stirred by stirring rod to fluffy.
Soil output: soil output is located inside shell latter half, and front end is connect with native storehouse rear wall openings, the two
Size is identical；It is formed by going out earthenware shell, helical blade and transmission shaft three parts；Transmission shaft connects helical blade and blender
Connect, drive blender and helical blade rotation, into stirring Tu Cang the soil body by blender rotation stirring to fluffy and fall into
Native orlop portion is stirred, push-bench model rear is then delivered to by the soil output being attached thereto, then by being manually transported to hole
Outside.
The effect of metallic channel is that the conducting wire for stirring native storehouse inner sensor is drawn, and avoids being twisted by blender into destruction, influence
The acquisition of data during test.The effect in correcting error guidance hole is: reserving receiving port and jacking well in the received well borehole wall when test
It is drawn immediately below wall working hole and sets a flexible wire ropes, the correcting error guidance hole of steel wire penetrating push pipe simulator utilizes two o'clock
The principle for determining straight line guarantees not shift in jack-in process by flexible wire ropes, finally can smoothly connect from reserved
It closes up and ejects.
It stirs support pressure to adjust: passing through formula P=K before test0γ h calculates face soil pressure, wherein P-soil pressure
Power, the average severe of γ-soil, h-edpth of tunnel, the lateral coefficient of static earth pressure of K0-soil.During the test, if
It stirs native storehouse pressure sensor and monitors that pressure is greater than the face soil pressure calculated, by reducing thrust force or increase
Stepper motor revolving speed is adjusted, and guarantees the stability for excavating face.
Model test is a kind of Excavation simulation device with earth pressure balanced push-bench constructional device, for simulating push-bench pick
Into excavation construction.Soil is cut by front cutter tip, carries out Excavation simulation.It is cut thrust of earth and comes from behind the very heavy pushing tow of jacking
Power, the soil body being cut enters after push-bench model to be stirred by blender to fluffy in stirring Tu Cang, then by having spiral
The soil output of blade is transported to push pipe drive end unit, then manually removes tunnel again.
About the correlation test analog study of construction by pipeline jacking method, predominantly field monitoring test or interior only considers jacking
It is interactional small than ruler physical test, the influence that work progress generates is not considered.Because it can be in model by model test
System is made to consider its noncontinuity in the process and is needed to be monitored laying a little according to research, can be with real simulation pipe jacking tunnel
The space displacement feature and stress variation situation on stratum in work progress.This open model tests earth pressure balanced push-bench structure
Device digs the invention of model, and it is big than ruler physical experiments to can be used for push pipe tunneling construction process, passes through and carries out pipe jacking tunnel
The simulation that the processes such as soil and dregs output are tunneled, cut in construction uses, and is heterotaxis, soil pressure in pipe jacking tunnel work progress
The correlation models experimental study such as variation and section of jurisdiction stress condition lays the foundation.
The foregoing is only a preferred embodiment of the present invention, but scope of protection of the present invention is not limited thereto,
Anyone skilled in the art in the technical scope disclosed by the present invention, according to the technique and scheme of the present invention and its
Inventive concept is subject to equivalent substitution or change, should be covered by the protection scope of the present invention.
Claims (10)
1. a kind of earth pressure balanced push-bench constructional device of model test, it is characterized in that, including shell, cutter tip, spiral shell
Screw out earthenware；
The model test front end of earth pressure balanced push-bench constructional device is arranged in the cutter tip；The bite
Head include excavate blade foot (2), the excavation blade foot (2) in a ring, the inclined face in front end；
The shell (1) connect with the cutter tip that front end is arranged；
The soil output is located inside shell (1) latter half, and the soil output includes earthenware shell (10), spiral shell
Vane piece (8) and transmission shaft (9)；The transmission shaft (9) connect with helical blade (8), which drives helical blade
(8) it rotates.
2. a kind of earth pressure balanced push-bench constructional device of model test according to claim 1, it is characterized in that, institute
Stating cutter tip further includes segmentation blade foot (3), and the segmentation blade foot (3) is provided with horizontal and vertical direction and arranges a plurality of blade foot,
To the soil body piecemeal that excavation blade foot (2) is cut.
3. a kind of earth pressure balanced push-bench constructional device of model test according to claim 2, it is characterized in that, institute
It states and is provided with correcting error guidance hole (5) among the bottommost for excavating blade foot (2), to correct the model test with earth pressure balanced top
It shifts in pipe machine constructional device tunneling process.
4. a kind of earth pressure balanced push-bench constructional device of model test according to claim 3, it is characterized in that, institute
The perforative setting in correcting error guidance hole (5) is stated on the shell (1) wall.
5. a kind of earth pressure balanced push-bench constructional device of model test according to claim 1, it is characterized in that, institute
The leading portion for stating shell (1) has been arranged radially native storehouse rear wall (7), and the soil storehouse rear wall (7) and the leading portion of the shell (1) enclose jointly
At the stirring Tu Cang, the soil body that the stirring Tu Cang is cut to accommodate the cutter tip.
6. a kind of earth pressure balanced push-bench constructional device of model test according to claim 5, it is characterized in that, institute
It states stirring Tu Cang and is provided with blender (6), soil of the blender (6) to enter stirring Tu Cang after cutting the cutter tip
Body rotation stirring is to fluffy and fall into the native orlop portion of stirring.
7. a kind of earth pressure balanced push-bench constructional device of model test according to claim 6, it is characterized in that, institute
State and be provided with opening identical with the soil output size on native storehouse rear wall (7), the soil output front end with it is described
The opening of native storehouse rear wall (7) connects；And the transmission shaft (9) is connect by opening with the blender (6), the transmission shaft (9)
Drive blender (6) rotation.
8. a kind of earth pressure balanced push-bench constructional device of model test according to claim 7, it is characterized in that, institute
Blender (6) is stated from five to the inclined stirring bar construction of excavation face.
9. a kind of earth pressure balanced push-bench constructional device of model test according to claim 1-8, special
Point is, is provided on the shell (1) metallic channel (4), the metallic channel (4) to by the model test with earth pressure balanced
The cable of push-bench constructional device and the conducting wire of sensor are drawn.
10. a kind of earth pressure balanced push-bench constructional device of model test according to claim 9, it is characterized in that,
The shell (1) is identical as the cross-sectional sizes of the cutter tip.
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| CN201910478836.5A CN110195596A (en) | 2019-06-03 | 2019-06-03 | A kind of model test earth pressure balanced push-bench analogy method and constructional device |
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| CN201910478836.5A CN110195596A (en) | 2019-06-03 | 2019-06-03 | A kind of model test earth pressure balanced push-bench analogy method and constructional device |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114810112A (en) * | 2022-06-28 | 2022-07-29 | 北京建工土木工程有限公司 | Device for chiseling enclosure structure at shield end well opening and construction method |
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| CN114810112A (en) * | 2022-06-28 | 2022-07-29 | 北京建工土木工程有限公司 | Device for chiseling enclosure structure at shield end well opening and construction method |
| CN114810112B (en) * | 2022-06-28 | 2022-10-21 | 北京建工土木工程有限公司 | Device for chiseling enclosure structure at shield end well opening and construction method |
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