CN208502791U - A kind of double-deck steel tube shed of railway tunnel - Google Patents
A kind of double-deck steel tube shed of railway tunnel Download PDFInfo
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- CN208502791U CN208502791U CN201820961779.7U CN201820961779U CN208502791U CN 208502791 U CN208502791 U CN 208502791U CN 201820961779 U CN201820961779 U CN 201820961779U CN 208502791 U CN208502791 U CN 208502791U
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Abstract
The purpose of this utility model is to provide a kind of railway tunnel bilayer steel tube shed, interlamellar spacing 40cm, every layer of pipe canopy circumferential direction spacing 60cm inside and outside the bilayer steel tube shed；Conduit is provided in the bilayer steel tube shed；The conduit includes injected hole, only slurry section, steel reinforcement cage；Set steel reinforcement cage in the conduit, the steel reinforcement cage includes fixed ring and the main reinforcement that is uniformly arranged on the outside of fixed ring, and firm welding.The setting that the utility model passes through steel reinforcement cage in the double-deck steel tube shed improves the bending resistance of conduit, cement slurry is injected into conduit by injected hole, improve the bearing capacity of the double-deck steel tube shed, the endurance of four main reinforcements is concentrated in together by fixed ring, avoid single root main reinforcement stress, the whole pressure-bearing of steel reinforcement cage is enhanced by way of integrally sharing, and ensure that support of the double-deck steel tube shed to rock stratum, it is ensured that subsequent construction is gone on smoothly.
Description
Technical field
The utility model belongs to the technical field of tunnel support structure, and in particular to a kind of double-deck big pipe of railway tunnel
Canopy.
Background technique
The high speed development of railway construction in China is limited by alpine terrain, urban architecture condition, large section station tunnel
Building for road is more and more, and when wearing construction under tunnel, newly built tunnels vault and existing tunnel bottom plate spacing are small, and concussion of blasting is to knot
Perturbing for country rock be easy to cause vault rock to enclose partly or wholly unstability, collapsing between structure, and safety accident, which occurs, simultaneously influences existing tunnel
Normal function pays construction by the double-deck steel tube shed in advance, prevents foundation bearing capacity insufficient, causes integral sinking.
Utility model content
The purpose of this utility model is to provide a kind of double-deck steel tube shed of railway tunnel, the bilayer steel tube shed ectonexines
Spacing 40cm, every layer of pipe canopy circumferential direction spacing 60cm；Be provided with conduit in the bilayer steel tube shed, the conduit include injected hole,
Section, steel reinforcement cage are only starched, the injected hole is arranged on conduit, and the aperture of the injected hole is 10-16mm, pitch of holes 20cm,
The injected hole is in quincuncial arrangement；The tail portion of the conduit there are more than or equal to 100cm the section that do not drill until starch section.This reality
The bending resistance that conduit is improved with the novel setting by steel reinforcement cage in the double-deck steel tube shed, is injected by injected hole into conduit
Cement slurry improves the bearing capacity of the double-deck steel tube shed, guarantees going on smoothly for subsequent construction.
What the utility model was mainly achieved through the following technical solutions: interlamellar spacing 40cm inside and outside the bilayer steel tube shed,
Every layer of pipe canopy circumferential direction spacing 60cm；Conduit is provided in the bilayer steel tube shed, the conduit specification is hot rolled seamless steel tube, and
Outer diameter is 108mm, wall thickness 5mm；The conduit includes injected hole, only slurry section and the steel reinforcement cage being arranged in conduit, the slip casting
Hole is arranged on conduit, and the aperture of the injected hole is 10-16mm, pitch of holes 20cm, and the injected hole is in quincuncial arrangement；
The tail portion of the conduit there are more than or equal to 100cm the section that do not drill until starch section.
In use, conduit selects the seamless tempering pipe of hot rolling to the utility model, and the outer diameter of conduit is 108mm, conduit
Wall thickness be 5mm, the conduit processes screw thread in lathe for machining, the processing of injected hole first carried out before carrying out tubulature, logical
It crosses drilling machine and is drilled with the injected hole that aperture is 10 ~ 16mm in conduit surrounding, the spacing of each injected hole is 20cm, a left side for the conduit
The distance of right output port 1m is not drilling, and only slurry section is formed at catheter port；First injected hole is carried out before assembling conduit
It borehole cleaning and verifies, carries out cleaning bottom of hole repeatedly first with drill bit, the dross in cleaning hole, it is ensured that the aperture of injected hole and hole depth meet
It is required that clearing up boring mud from bottom hole to aperture using high pressure air pressure gun, and detect the setting at inclination angle, outer limb to prevent plug-hole；It is described
Steel reinforcement cage is had additional in conduit, the steel reinforcement cage is made of four main reinforcements and fixed ring, and the uniform branch of main reinforcement is the four of fixed ring
In week, main reinforcement passes through with fixed ring to be welded and fixed, and main reinforcement is fixedly welded with fixed ring every 1m, by the way that steel reinforcement cage is penetrated conduit
In, and the jacking conduit in the way of mechanical jacking, after installing conduit, by slip casting machine by injected hole into conduit into
Row slip casting.
The utility model is added by steel reinforcement cage in conduit injected hole and conduit, and setting by injected hole progress slip casting
It sets, so that the double-deck steel tube shed has very strong bending resistance, improves the integral strength and bearing capacity of bimetallic tube canopy, it is ensured that country rock
Monolithic stability.
In order to preferably realize the utility model, further, the steel reinforcement cage includes four main reinforcements and several are fixed
Ring, main ribs diameter be 18mm, the fixed ring use diameter for φ 60mm, length 5cm, with a thickness of the short tube of 4.5mm
Section, main ribs are uniformly arranged on the outside of fixed ring, and firm welding, and the fixed ring is welded every 1m spacing to be arranged.Reinforcing bar
Cage is fixedly welded by main reinforcement and fixed ring, so that steel reinforcement cage has stronger bearing capacity, by fixed ring by four masters
The endurance of muscle concentrates in together, and avoids single root main reinforcement stress, the whole of steel reinforcement cage is enhanced by way of integrally sharing
Body pressure-bearing ensure that the support to rock stratum, keeps the space under support sufficiently safe, guarantees the safety of operating personnel.
In order to preferably realize the utility model, further, it is staggered before and after the adjacent connector of the conduit；Positioned at same
Connector quantity in cross section is no more than half, and the 1m that is staggered between adjacent catheter connector.By being staggered pipe joint, so that
Conduit meets force request in spreading, so that the point in the bearing capacity of the inside and outside canopy of the double-deck steel tube shed is not located at same place, warp
The suffered active force of dispersion is crossed, the double-deck steel tube shed is withstood more force, and there is the longer service life.
In order to preferably realize the utility model, further, the injected hole into conduit grouting sequence successively from leaning on
The injected hole at nearly only slurry section both ends is gradually mobile to intermediate injected hole.
The utility model in use, the cement slurry of injection water ash 1:1 in injected hole, slip casting first uses 0.5 ~
The pressure of 1.0MPa is first to the injected hole injection at only slurry section, and final pressure will reach 2MPa, and continue slip casting 15min
After stop slip casting；Grouting amount need to meet design requirement, and general injection rate is 1.5 times of drilling cylindrical body, if reaching in grouting amount
It is required that but when the pressure requirements of not up to slip casting, because stopping the injection of existing concentration cement slurry, change the higher cement slurry of implantation concentration
Continue to inject, it is ensured that drilling surrounding rock body and pore filling around steel pipe are full；Grouting sequence is two sides symmetrically to centre, under
Every hole slip casting, first placing " list " number hole, in placing " double " number hole on and.The utility model passes through injected hole guide by slip casting machine
Slip casting is carried out in pipe, by specific grouting mode and sequence, so that conduit has preferably endurance after completing slip casting, and
Guarantee the support strength of the double-deck greenhouse pipe.
It further include guiding wall further, the guiding wall includes that setting is being led to preferably realize the utility model
To I20b i-beam frame and guide sleeve within the walls, the guide sleeve and I20b i-beam frame firm welding, the guiding wall
It is poured using C20 mixed mud, the high 1.2m of the guiding wall, thickness 1.5m.The guiding wall is used for the support to the double-deck steel tube shed,
The I20b i-beam frame of interior setting, which to be oriented to wall, can bear the power of the double-deck steel tube shed itself and its born rock stratum, the guiding
The angle of casing limb controls the construction direction of pipe canopy, and the guiding wall can add according to the weight of specific basal bed or receiving
The basis of deep guiding wall, and using the locking angle anchorage underpinning of φ 50, guarantee that guiding wall has enough stability fundamentals and holds
Stress.
In order to preferably realize the utility model, further, the I20b i-beam frame for being oriented to portion within the walls is provided with 6
Pin, it is longitudinal between the i-beam frame that reinforcing bar connection, i-beam frame inside abutting rock mass connects using φ 22mm with radial.Pass through
The setting of 6 Pin of I20b i-beam frame guarantees the support strength of whole steel tube shed so that guiding wall has enough enabling capabilities.
In order to preferably realize the utility model, further, the outer limb of the guide sleeve being arranged within the walls that is oriented to is
1°.According to the setting of guide sleeve, the construction direction of pipe canopy is controlled, guarantees that the double-deck steel tube shed is scheduled construction, guarantees to rock
The support of layer.
The utility model has the beneficial effects that
(1) interlamellar spacing 40cm, every layer of pipe canopy circumferential direction spacing 60cm inside and outside the double-deck steel tube shed；In the bilayer steel tube shed
It is provided with conduit；The conduit includes injected hole, only slurry section, steel reinforcement cage, and the injected hole is arranged on conduit, the fluid stopping slurry
It positioned at catheter tail 100cm and is the setting that do not drill；The catheter interior adds steel reinforcement cage.The utility model passes through conduit slip casting
Steel reinforcement cage is added in hole and conduit, and the setting of slip casting is carried out by injected hole so that the double-deck steel tube shed have it is very strong anti-
Curved ability improves the integral strength and bearing capacity of bimetallic tube canopy, it is ensured that country rock monolithic stability.
(2) steel reinforcement cage includes four main reinforcements and several fixed rings, and main ribs are uniformly arranged on the outside of fixed ring, and
Firm welding.Steel reinforcement cage is fixedly welded by main reinforcement and fixed ring, so that steel reinforcement cage has stronger bearing capacity, by solid
Determine ring to concentrate in together the endurance of four main reinforcements, avoids single root main reinforcement stress, enhanced by way of integrally sharing
The whole pressure-bearing of steel reinforcement cage, ensure that the support to rock stratum, keeps the space under support sufficiently safe, guarantees the peace of operating personnel
Entirely.
(3) conduit meets force request in spreading, i.e., is staggered before and after the connector of adjacent catheter；Positioned at same cross-section
Connector quantity in face is no more than half, and the 1m that is staggered between adjacent catheter connector.By being staggered pipe joint, so that double
The point of the bearing capacity of layer steel tube shed is not located at same place, by dispersing suffered active force, the double-deck steel tube shed is born more
Big power, and there is the longer service life.
(4) the conduit carries out slip casting, the note into conduit by injected hole after placing and being put into steel reinforcement cage
Slurry sequence is gradually mobile to intermediate injected hole by the injected hole of nearly only slurry section.The utility model passes through slip casting by slip casting machine
Hole carries out slip casting into conduit, by specific grouting mode and sequence, preferably holds so that conduit has after completing slip casting
Stress, and guarantee the support strength of the double-deck greenhouse pipe.
(5) the guiding wall includes the I20b i-beam frame and guide sleeve being arranged in Dao Xiang within the walls, the guide sleeve
With I20b i-beam frame firm welding, the guiding wall is poured using C20 mixed mud, the high 1.2m of the guiding wall, thickness 1.5m.Institute
Guiding wall is stated for the support to the double-deck steel tube shed, the I20b i-beam frame being arranged inside makes guiding wall that can bear the double-deck big pipe
The angle of the power of canopy itself and its born rock stratum, the guide sleeve limb controls the construction direction of pipe canopy, the guiding
Wall can deepen the basis of guiding wall according to the weight of specific basal bed or receiving, and reinforce base using the locking angle anchorage of φ 50
Plinth guarantees that guiding wall has enough stability fundamentals and endurance.
(6) the I20b i-beam frame for being oriented to portion within the walls is provided with 6 Pin, and longitudinal and radial direction uses between the i-beam frame
Rock mass is close in the connection of φ 22mm connection reinforcing bar, i-beam frame inside；The outer limb of the guide sleeve being arranged within the walls that is oriented to is 1 °,
Control the construction direction of pipe canopy.It is protected by the setting of 6 Pin of I20b i-beam frame so that guiding wall has enough enabling capabilities
Demonstrate,prove the support strength of whole steel tube shed；According to the setting of guide sleeve, the construction direction of pipe canopy is controlled, guarantees that the double-deck steel tube shed is
Scheduled construction guarantees the support to rock stratum.
Detailed description of the invention
Fig. 1 is the structural schematic diagram of the double-deck steel tube shed；
Fig. 2 is reinforcement cage structure schematic diagram in conduit.
Wherein: 3- is oriented to wall, 4- i-beam frame, 5- conduit, 6- injected hole, 7- and only starches section, 8- steel reinforcement cage, 9- main reinforcement, 10-
Fixed ring, 11- guide sleeve.
Specific embodiment
Embodiment 1:
A kind of double-deck steel tube shed of railway tunnel, interlamellar spacing 40cm inside and outside the bilayer steel tube shed, between every layer of pipe canopy is circumferential
Away from 60cm；Be provided with conduit 5 in the bilayer steel tube shed, 5 specification of conduit is hot rolled seamless steel tube, and outer diameter be 108mm,
Wall thickness 5mm；The conduit 5 includes injected hole 6, only slurry section 7 and the steel reinforcement cage 8 being arranged in conduit 5, and the injected hole 6 is arranged
On conduit 5, the aperture of the injected hole 6 is 10-16mm, pitch of holes 20cm, and the injected hole 6 is in quincuncial arrangement；Institute
Section 7 is starched until the tail portion of conduit 5 is stated there are the section that do not drill more than or equal to 100cm.
In use, conduit 5 selects the seamless tempering pipe of hot rolling to the utility model, and the outer diameter of conduit 5 is 108mm, leads
The wall thickness of pipe 5 is 5mm, and the conduit 5 processes screw thread in lathe for machining, and adding for injected hole 6 is first carried out before carrying out tubulature
Work is drilled with the injected hole 6 that aperture is 10 ~ 16mm in 5 surrounding of conduit by drilling machine, and the spacing of each injected hole 6 is 20cm, described
The distance of the left and right port 1m of conduit 5 is not drilling, and only slurry section 7 is formed at 5 port of conduit；Before assembling conduit 5 first
Borehole cleaning is carried out to injected hole 6 and is verified, carries out cleaning bottom of hole repeatedly first with drill bit, the dross in cleaning hole, it is ensured that injected hole 6
Aperture and hole depth meet the requirements, and to prevent plug-hole, clear up boring mud from bottom hole to aperture using high pressure air pressure gun, and detect inclination angle, outer
The setting of limb；Steel reinforcement cage 8 is had additional in the conduit 5, the steel reinforcement cage 8 is made of four main reinforcements 9 and fixed ring 10, main reinforcement
9 uniform branches are in the surrounding of fixed ring 10, and main reinforcement 9 passes through with fixed ring 10 to be welded and fixed, and main reinforcement 9 is fixedly welded with every 1m
Fixed ring 10, by the way that steel reinforcement cage 8 is penetrated in conduit 5, and the jacking conduit 5 in the way of mechanical jacking, installing conduit 5
Afterwards, slip casting is carried out into conduit 5 by injected hole 6 by slip casting machine.
The utility model is added by steel reinforcement cage 8 in 5 injected hole 6 of conduit and conduit 5, and is infused by injected hole 6
The setting of slurry improves the integral strength and bearing capacity of bimetallic tube canopy, really so that the double-deck steel tube shed has very strong bending resistance
Protect country rock monolithic stability.
Embodiment 2:
The present embodiment advanced optimizes on the basis of embodiment 1, as shown in Fig. 2, the steel reinforcement cage 8 includes four main reinforcements
9 and several fixed rings 10,9 diameter of main ribs is 18mm, and the fixed ring 10 uses diameter for φ 60mm, length 5cm, thickness
Degree is the short tube section of 4.5mm, and main ribs 9 are uniformly arranged on the outside of fixed ring 10, and firm welding, the fixed ring 10 every
The welding setting of 1m spacing.Steel reinforcement cage 8 is fixedly welded by main reinforcement 9 and fixed ring 10, so that steel reinforcement cage 8 has stronger pressure-bearing
Ability is concentrated in together the endurance of four main reinforcements 9 by fixed ring 10, is avoided single 9 stress of root main reinforcement, is passed through entirety
The mode shared enhances the whole pressure-bearing of steel reinforcement cage 8, ensure that the support to rock stratum, keeps the space under support sufficiently safe,
Guarantee the safety of operating personnel.
The other parts of the present embodiment are same as Example 1, and so it will not be repeated.
Embodiment 3:
The present embodiment advanced optimizes on the basis of embodiment 2, and the conduit 5 meets force request in spreading, i.e.,
It is staggered before and after the connector of adjacent catheter 5；Connector quantity in same cross section is no more than half, and 5 connector of adjacent catheter
Between be staggered 1m.By being staggered 5 connector of conduit, so that the point in the bearing capacity of the double-deck steel tube shed is not located at same place, pass through
The suffered active force of dispersion enables the double-deck steel tube shed to withstand more force, and has the longer service life.
The other parts of the present embodiment are identical as above-described embodiment 2, and so it will not be repeated.
Embodiment 4:
The utility model advanced optimizes on the basis of embodiment 3, and the conduit 5 is placing and is being put into steel reinforcement cage 8
Afterwards, i.e., slip casting is carried out into conduit 5 by injected hole 6, the grouting sequence is by the injected hole 6 of nearly only slurry section gradually to centre
Injected hole 6 it is mobile.
The utility model in use, the cement slurry of injection water ash 1:1 in injected hole 6, slip casting first uses 0.5 ~
The pressure of 1.0MPa is first injected to the injected hole 6 at only slurry section 7, and final pressure will reach 2MPa, and continue slip casting
Stop slip casting after 15min；Grouting amount need to meet design requirement, and general injection rate is 1.5 times of drilling cylindrical body, if in grouting amount
Reach requirement, but when the pressure requirements of not up to slip casting, because stopping the injection of existing concentration cement slurry, changes the higher water of implantation concentration
Mud continues to inject, it is ensured that drilling surrounding rock body and pore filling around steel pipe are full；Grouting sequence is two sides symmetrically to centre,
From bottom to top every hole slip casting, first placing " list " number hole, in placing " double " number hole.The utility model passes through injected hole by slip casting machine
6 carry out slip casting into conduit 5, by specific grouting mode and sequence, preferably hold so that conduit 5 has after completing slip casting
Stress, and guarantee the support strength of the double-deck greenhouse pipe.
The other parts of this implementation are same as Example 3, and so it will not be repeated.
Embodiment 5:
The present embodiment optimizes on the basis of embodiment 4, as shown in Figure 1, the guiding wall 3 includes that setting is being oriented to
I20b i-beam frame 4 and guide sleeve 11 in wall 3, the guide sleeve 11 and 4 firm welding of I20b i-beam frame, it is described to lead
It is poured to wall 3 using C20 mixed mud, the high 1.2m of the guiding wall 3, thickness 1.5m；I20b i-beam frame inside the guiding wall 3
4 are provided with 6 Pin, and longitudinal direction connect reinforcing bar connection using φ 22mm with radial between the i-beam frame 4, are close on the inside of i-beam frame 4
Rock mass；The outer limb of guide sleeve 11 being arranged in the guiding wall 3 is 1 °, controls the construction direction of pipe canopy.
In use, the guiding wall 3 is arranged inside the utility model for the support to the double-deck steel tube shed
I20b i-beam frame 4, which to be oriented to wall 3, can bear the power of the double-deck steel tube shed itself and its born rock stratum, the guide sleeve 11
The angle of limb controls the construction direction of pipe canopy, and the guiding wall 3 can be deepened according to the weight of specific basal bed or receiving
It is oriented to the basis of wall 3, and using the locking angle anchorage underpinning of φ 50, by the setting of 46 Pin of I20b i-beam frame, so that leading
There are enough enabling capabilities to wall 3, according to the setting of guide sleeve 11, control the construction direction of pipe canopy.
The utility model guarantees that guiding wall 3 has foot by the setting of i-beam frame 4 and guide sleeve 11 in guiding wall 3
Enough stability fundamentals and endurance guarantee the support strength of whole steel tube shed, guarantee that the double-deck steel tube shed is scheduled construction, guarantee
Support to rock stratum.
The other parts of the present embodiment are identical as above-described embodiment 4, and so it will not be repeated.
The above is only the preferred embodiment of the utility model, not does limit in any form to the utility model
System, any simple modification made by the above technical examples according to the technical essence of the present invention, equivalent variations, each falls within
Within the protection scope of the utility model.
Claims (7)
1. the double-deck steel tube shed of a kind of railway tunnel, using the steel tube shed of the double-deck φ 108 of 40m long, which is characterized in that described double
Interlamellar spacing 40cm, every layer of pipe canopy circumferential direction spacing 60cm inside and outside layer steel tube shed；Conduit (5), institute are provided in the bilayer steel tube shed
Stating conduit (5) specification is hot rolled seamless steel tube, and outer diameter is 108mm, wall thickness 5mm；The conduit (5) includes injected hole (6), stops
The steel reinforcement cage (8) starching section (7) and being arranged in conduit (5), the injected hole (6) are arranged on conduit (5), the injected hole
(6) aperture is 10-16mm, pitch of holes 20cm, and the injected hole (6) is in quincuncial arrangement；It stays the tail portion of the conduit (5)
Have and starches section (7) until the section that do not drill more than or equal to 100cm.
2. a kind of double-deck steel tube shed of railway tunnel according to claim 1, which is characterized in that steel reinforcement cage (8) packet
Four main reinforcements (9) and several fixed rings (10) are included, main ribs (9) diameter is 18mm, and the fixed ring (10) uses diameter
For φ 60mm, length 5cm, with a thickness of the short tube section of 4.5mm, the fixed ring (10) is equidistantly welded in main reinforcement (9), and phase
Adjacent fixed ring (10) spacing 1m.
3. a kind of double-deck steel tube shed of railway tunnel according to claim 1, which is characterized in that the conduit (5) is adjacent
Connector before and after be staggered；It is no more than half, and adjacent catheter (5) connector positioned at the connector quantity of same cross section inner catheter (5)
Between be staggered 1m.
4. a kind of double-deck steel tube shed of railway tunnel according to claim 1, which is characterized in that the injected hole (6) to
Conduit (5) interior grouting sequence is successively gradually mobile to intermediate injected hole (6) from the injected hole (6) close to only slurry section (7) both ends.
5. a kind of double-deck steel tube shed of railway tunnel according to claim 1, which is characterized in that it further include guiding wall (3),
Guiding wall (3) includes I20b i-beam frame (4) and guide sleeve (11) of the setting in guiding wall (3), the guide sleeve
(11) and I20b i-beam frame (4) firm welding are managed, the guiding wall (3) is poured using C20 mixed mud, the guiding wall (3)
High 1.2m, thickness 1.5m.
6. a kind of double-deck steel tube shed of railway tunnel according to claim 5, which is characterized in that in the guiding wall (3)
The I20b i-beam frame (4) in portion is provided with 6 Pin, and longitudinal direction connect reinforcing bar company using φ 22mm with radial between the i-beam frame (4)
It connects, rock mass is close on the inside of i-beam frame (4).
7. a kind of double-deck steel tube shed of railway tunnel according to claim 5, which is characterized in that in the guiding wall (3)
Guide sleeve (11) the outer limb of setting is 1 °.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820961779.7U CN208502791U (en) | 2018-06-21 | 2018-06-21 | A kind of double-deck steel tube shed of railway tunnel |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820961779.7U CN208502791U (en) | 2018-06-21 | 2018-06-21 | A kind of double-deck steel tube shed of railway tunnel |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN208502791U true CN208502791U (en) | 2019-02-15 |
Family
ID=65287097
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201820961779.7U Active CN208502791U (en) | 2018-06-21 | 2018-06-21 | A kind of double-deck steel tube shed of railway tunnel |
Country Status (1)
| Country | Link |
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| CN (1) | CN208502791U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110778321A (en) * | 2019-11-14 | 2020-02-11 | 中建四局土木工程有限公司 | Pipe shed drill bit and pipe shed construction method under soft soil condition |
| CN113027466A (en) * | 2021-03-30 | 2021-06-25 | 中交一公局集团有限公司 | Underground excavation construction process for tunnel with extremely small clear distance |
-
2018
- 2018-06-21 CN CN201820961779.7U patent/CN208502791U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110778321A (en) * | 2019-11-14 | 2020-02-11 | 中建四局土木工程有限公司 | Pipe shed drill bit and pipe shed construction method under soft soil condition |
| CN113027466A (en) * | 2021-03-30 | 2021-06-25 | 中交一公局集团有限公司 | Underground excavation construction process for tunnel with extremely small clear distance |
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