CN107152290A - Big shield launching extensible track combination fixed structure and its construction method - Google Patents
Big shield launching extensible track combination fixed structure and its construction method Download PDFInfo
- Publication number
- CN107152290A CN107152290A CN201710458532.3A CN201710458532A CN107152290A CN 107152290 A CN107152290 A CN 107152290A CN 201710458532 A CN201710458532 A CN 201710458532A CN 107152290 A CN107152290 A CN 107152290A
- Authority
- CN
- China
- Prior art keywords
- guide rail
- portal
- buried steel
- fixed
- fixed structure
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
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Classifications
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH 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
- E21D9/14—Layout of tunnels or galleries; Constructional features of tunnels or galleries, not otherwise provided for, e.g. portals, day-light attenuation at tunnel openings
-
- E—FIXED CONSTRUCTIONS
- E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
- E01B—PERMANENT WAY; PERMANENT-WAY TOOLS; MACHINES FOR MAKING RAILWAYS OF ALL KINDS
- E01B23/00—Easily dismountable or movable tracks, e.g. temporary railways; Details specially adapted therefor
- E01B23/10—Shiftable tracks for heavy loads, e.g. carrying excavators
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH 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
- E21D9/06—Making by using a driving shield, i.e. advanced by pushing means bearing against the already placed lining
Abstract
The invention belongs to technical field of tunnel construction, more particularly to a kind of big shield launching extensible track combination fixed structure and its construction method, wherein extensible track combination fixed structure includes multiple guide rails along the pre-buried steel loop radial equipartition of portal, the pre-buried steel loop of portal is layed on diaphram wall, guide rail is steel plate one-shot forming, row's prepared screw-bolt hole is longitudinally provided with through guide rail lower planes, accordingly, row's guide rail placed hole is provided with along portal pre-buried steel ring length direction, each guide rail is fixed on the pre-buried steel loop of portal by matching the high intensity flat head bolt being arranged in each prepared screw-bolt hole and respective track placed hole successively, high intensity flat head bolt top planes are not higher than plane on guide rail；The construction method that extensible track combines fixed structure includes the processing steps such as guide rail processing, guide rail are positioned and guide rail is installed and fixed successively.The present invention is applied to large-diameter shield machine（Overweight cutterhead）Originate, can effectively prevent it from originating carrier head, and ensure to originate safety.
Description
Technical field
The invention belongs to technical field of tunnel construction, more particularly to a kind of big shield launching extensible track combination fixed knot
Structure and its construction method, it is adaptable to big shield machine（Overweight cutterhead）Originate.
Background technology
During constructing tunnel, before shield launching, to solve shield launching front end dip, traditional method is to adopt
With guide rail of the common rail as anti-carrier head.But weighed for used in large-diameter shield machine, particularly construction work
430T and the above overweight cutterhead, general guide rail stress can not ensure, and common fixation also easily occur it is smooth existing
As, thus it is difficult to ensure that big shield machine originates safety.
The content of the invention
The technical problem to be solved in the present invention is exactly to overcome above-mentioned the deficiencies in the prior art, and provides a kind of be applied to greatly directly
Footpath shield machine（Overweight cutterhead）Originate, effectively prevent it from originating carrier head, so as to ensure that originating safe big shield launching extension leads
Rail combines fixed structure and its construction method.
In order to solve the above technical problems, the technical solution adopted by the present invention is：
A kind of big shield launching extensible track combination fixed structure is designed, including is led along pre-buried the multiple of steel loop radial equipartition of portal
Rail, the pre-buried steel loop of portal is layed on diaphram wall, and the guide rail is the one-time formed guide rail of steel plate, is put down above and below guide rail
Face is longitudinally provided with row's diameter and the certain prepared screw-bolt hole of spacing dimension, sets accordingly, along portal pre-buried steel ring length direction
Have row's diameter and a certain guide rail placed hole of spacing dimension, each guide rail by match successively be arranged in each prepared screw-bolt hole and
High intensity flat head bolt in respective track placed hole is fixed on the pre-buried steel loop of portal, and high intensity flat head bolt top planes
Not higher than plane on guide rail.
Preferably, in above-mentioned big shield launching extensible track combination fixed structure, on rear side of the initiating terminal of the guide rail with
Slope is provided between portal pre-buried steel ring surface, the top of the slope is less than the upper plane of guide rail；And the slope
Distance of the top away from plane on guide rail is 15~25mm；Plane is shiny surface on guide rail simultaneously.
Preferably, in above-mentioned big shield launching extensible track combination fixed structure, on front side of the end of the guide rail and hole
High strength cast iron is implanted between door pre-buried steel ring surface, to prevent guide rail from moving forward.
Preferably, in above-mentioned big shield launching extensible track combination fixed structure, the two sides of the guide rail and portal
Gusset is welded with respectively between pre-buried steel ring surface, and the top for being welded with gusset is less than the upper plane of guide rail.
Preferably, in above-mentioned big shield launching extensible track combination fixed structure, each high intensity flat head bolt and portal
Fixed on pre-buried steel loop between corresponding set guide rail placed hole inwall by anchoring adhesive.
The present invention also provides the construction method that a kind of big shield launching extensible track as described above combines fixed structure, bag
Containing following processing step：
（1）Guide rail is processed
The height and width dimensions of guide rail are calculated according to shield machine and portal design size；According to the height and width drawn
Size is spent, is produced once shaping using the steel plate equivalent thick with width dimensions；Make after shaping, reserved on every guide rail certain
One row's bolt hole of diameter and spacing dimension size；
（2）Guide rail is positioned
First according to design requirement, the putting position of guide rail carries out preliminary line positioning in the pre-buried steel loop of portal；Then it is right
Guide rail is laid hole position and positioned, and keeps guide rail placement hole position consistent with set prepared screw-bolt hole hole position on guide rail to be installed,
Fixed with facilitating drilling and installing；
（3）Guide rail is installed and fixed
According to position line, hole position is laid to guide rail and implements to drill；After drilling is finished, anchoring adhesive is injected, after guide rail is put in place,
Hole-specifically quick insertion high intensity flat head bolt is fixed；After fixation, high intensity flat head bolt top planes are not higher than on guide rail
Plane.
Preferably, in the construction method of above-mentioned big shield launching extensible track combination fixed structure, in step（1）In,
After prepared screw-bolt hole, plane on guide rail is polished smooth, to reduce frictional force when shield machine is promoted；In step（3）In, guide rail
Lay before hole position implementation drilling, each guide rail placement hole position is re-started and checked, in order to which guide rail is accurately positioned and installed solid
It is fixed；In step（3）In, after drilling is finished, before injection anchoring adhesive, it will be cleaned out in each drilling, to improve anchoring strength.
Preferably, in the construction method of above-mentioned big shield launching extensible track combination fixed structure, in step（3）In,
Set and constituted by being welded with gusset between portal pre-buried steel ring surface after guide rail is installed and be fixed, on rear side of the initiating terminal of every guide rail
Slope, and the slope top be less than guide rail upper plane, to facilitate cutterhead upper rail.
Preferably, in the construction method of above-mentioned big shield launching extensible track combination fixed structure, in step（3）In,
After guide rail is installed and be fixed, high strength cast iron progress is implanted with front side of the end of every guide rail between portal pre-buried steel ring surface
It is fixed, to prevent guide rail from moving forward.
Preferably, in the construction method of above-mentioned big shield launching extensible track combination fixed structure, in step（3）In,
After guide rail is installed and be fixed, in guide rail two sides by being welded with gusset, guide rail and the pre-buried steel loop of portal are fixed again, effectively protected
Demonstrate,prove the stable property of guide rail；And the top of be welded with gusset is less than the upper plane of guide rail.
" the starting of guide rail being previously mentioned in above-mentioned big shield launching extensible track combination fixed structure and its construction method
End " refer to shield machine during Specific construction it is firm on guide rail end, " end of guide rail " refers to during construction guide rail close to face most
Front end, the initiating terminal " rear side " of guide rail and the end " front side " of guide rail are direction of propulsion using shield machine along guide rail as reference.
The beneficial effect of technical solution of the present invention is：
1st, the present invention uses the special guide rail of steel plate one-shot forming, and guide rail stress is guaranteed；And will be led using anti-shearing bolt penetration hole
Rail is fixed on the pre-buried steel loop of portal, is less prone to slippery phenomenon, is efficiently solved big shield launching front end dip, be ensure that
Big shield machine originates safety.
2nd, plane is smooth on guide rail of the present invention, to reduce frictional force when shield machine is promoted；Special cleaning is dry in drilling
Only, to improve anchoring strength.The setting of guide rail initiating terminal slope, and upper plane of the top less than guide rail of the slope, with
Facilitate cutterhead upper rail.
3rd, high strength cast iron progress is implanted between portal pre-buried steel ring surface on front side of the end of every guide rail of the present invention
It is fixed, to prevent guide rail from moving forward.In guide rail two sides by being welded with gusset, guide rail and the pre-buried steel loop of portal are fixed again,
The stable property of guide rail has been effectively ensured in multiple measure.
Brief description of the drawings
The embodiment to the present invention is described in further detail below in conjunction with the accompanying drawings, wherein：
Fig. 1 combines the schematic diagram of fixed structure for the big shield launching extensible track of the present invention；
Fig. 2 is local I mplifying structure schematic diagram shown in Fig. 1；
Fig. 3 is A shown in Fig. 2 to structural representation；
Sequence number in figure：1st, guide rail, 2, the pre-buried steel loop of portal, 3, high intensity flat head bolt, 4, diaphram wall, 5, be welded with gusset,
6th, high strength cast iron, 7, be welded with gusset.
Embodiment
Illustrate the embodiment of the present invention with reference to the accompanying drawings and examples, but following examples are used only to specifically
The bright present invention, does not limit the scope of the present invention in any way, and involved instrument element is such as without spy in the examples below
Do not mentionlet alone bright, be conventional instrument element.
Embodiment 1：
Referring to Fig. 1-3, in figure, the big shield launching extensible track combination fixed structure of the present invention, including guide rail 1, and to will
The high intensity flat head bolt 3 that guide rail is fixedly connected with both pre-buried steel loops of portal 2.Rail height is 150mm, and width is 100mm,
Fixing bolt is 10.9 grades of M30*490mm high intensity flat head bolts.
The wherein pre-buried steel loop of portal is layed on diaphram wall 4, and guide rail has five, and radially equal along the pre-buried steel loop of portal
Cloth is set, and guide rail is the one-time formed guide rail of steel plate, and a diameter of 20mm of a row and spacing are longitudinally provided with through guide rail lower planes
For 100mm prepared screw-bolt hole, it is accordingly, along portal pre-buried steel ring length direction provided with a diameter of 40mm of a row and spacing
100mm guide rail placed hole, every guide rail is arranged in each prepared screw-bolt hole and respective track placed hole by matching successively
High intensity flat head bolt is fixed on the pre-buried steel loop of portal, and high intensity flat head bolt top planes are not higher than plane on guide rail.
Specifically, passing through anchoring adhesive between each high intensity flat head bolt set guide rail placed hole inwall corresponding on the pre-buried steel loop of portal
It is fixed.
Further, it is provided with and is formed by being welded with gusset 5 between portal pre-buried steel ring surface on rear side of the initiating terminal of guide rail
Slope, the top of the slope is less than the upper plane of guide rail, facilitates cutterhead upper rail；And the top of the slope is away from leading
On rail plane apart from a values be 20mm；Plane is shiny surface on guide rail simultaneously, to reduce frictional force when shield machine is promoted.Enter
One step, high strength cast iron 6 is implanted between portal pre-buried steel ring surface on front side of the end of guide rail, to prevent before guide rail
Move.Further, gusset 7 is welded with respectively between the two sides of guide rail and portal pre-buried steel ring surface, by guide rail and portal
Pre-buried steel loop is tightly fastened again, and multiple measure is effectively guaranteed the stable property of guide rail；The top of be welded with gusset, which is less than, leads
The upper plane of rail, in case influence shield machine is promoted along guide rail longitudinal direction is normal.
Embodiment 2：
Below by taking the intercity foreign shield tunnel project of FGZH-3 marks lion of Buddhist tabernaemontanus bulrush as an example, illustrate that big shield launching prolongs described in embodiment 1
Stretch the construction method of track combination fixed structure.The shield tunnel project is using the major diameter mud for possessing normal pressure tool changing function
Water quality structure, 13.61 meters of digging diameter;137 meters of whole length, 14.4 meters of main frame length（430T containing cutterhead）, main frame weight is about
2000T, main screw lift about 3500T.Shield launching uses new extensible track, and shield cutter makes smooth advances upper extensible track, not
Generation shield front end dip.Wherein material prepares to be shown in Table 1 with equipment.
The material of table 1 and device configuration table：
| Sequence number | Goods and materials title | Specifications and models | Unit | Quantity | Remarks |
| 1 | Steel plate | Thick 50mm | ㎡ | 5.15 | |
| 2 | Bolt | 10.9 grades, M30*490 | It is individual | 80 | |
| 3 | Anchoring adhesive | Branch | 30 | ||
| 4 | Oxygen-acetylene | Set | 1 | ||
| 5 | Water drilling | Diameter 40mm | Platform | 1 |
Specific construction technological process and construction point are as follows：
（1）Guide rail is processed：
The height that guide rail is calculated according to shield machine and portal design size is 15mm, and width dimensions are 100mm；According to gained
The height and width dimensions gone out, guide rail is produced once shaping using the thick steel plates of 100mm；Make after shaping, on every guide rail
Reserve five bolts hole of a row of a diameter of 40mm and spacing for 100mm.After prepared screw-bolt hole, by plane polishing light on guide rail
It is sliding, to reduce frictional force when shield machine is promoted.Diameter of bolt hole and spacing accuracy are must assure that during processing and fabricating, it is convenient follow-up
Install.
（2）Guide rail is positioned：
Guide rail is positioned in two steps, and by measurement group, according to design requirement, the putting position of guide rail in the pre-buried steel loop of portal enters the first step
The preliminary line positioning of row；Second step is to lay hole position to guide rail to position, and convenient drilling and installation are fixed.The step emphasis
It is ensured that guide rail placement hole position is consistent with set prepared screw-bolt hole hole position on guide rail to be installed, therefore except processing and fabricating guide rail
During outside strict control prepared screw-bolt hole position precision, also need the brill to each guide rail riding position before guide rail lays hole position drilling
Hole hole position, which is re-started, to be checked, and in order to be accurately positioned, is fixed.
（3）Guide rail is installed and fixed：
According to position line, hole position is laid to guide rail and implements to drill by water drilling；After drilling is finished, anchoring adhesive is injected, guide rail is put
It is put into behind position, hole-specifically 10.9 grades of M30*490mm high intensity flat head bolts of quick insertion are fixed；After fixation, high intensity tack
Bolt top planes are not higher than plane on guide rail.The emphasis of the step is that each drilling must be cleaned out using airduct and veil
Ponding and residue, then by anchoring adhesive hand-hole, to improve anchoring strength.
After every guide rail is installed and be fixed, by being welded with gusset it can also be made low 20mm's at the firm upper rail end of shield machine
It is domatic, facilitate cutterhead upper rail.Every guide rail can be fixed by being implanted into high strength cast iron foremost close to face, be prevented
Only guide rail moves forward.After all guide rails are laid and finished, in guide rail side by being welded with gusset, by guide rail and the pre-buried steel loop of portal again
Secondary to be tightly fastened, multiple measure is effectively guaranteed the stable property of guide rail；And the top of be welded with gusset is upper flat less than guide rail
Face, in case influence shield machine is promoted along guide rail longitudinal direction is normal.
In addition, the shield tunnel project quality control on construction is as follows：
（1）First dust in hole or debris are cleaned out with inflator before steel plate is installed.
（2）Check whether be bonded debris on bolt before anchoring adhesive is smeared, if having corrosion above bolt or other are different
Thing, it is necessary to can be smeared with alcohol or cotton yarn wiped clean.
（3）Forbid to touch bolt or steel plate before anchoring adhesive is uncured, influence solidification effect.
（4）Bolt is rotatably inserted into hole, it is ensured that there is glue spilling in aperture（But should not excessively it expose）, whether glue-line is full will
Directly affect the size of anchor force.
The shield tunnel project work progress uses safety measure as follows：
（1）When being constructed near portal, moment concern face stable case finds, leader is reported in time, in time place in time
Reason, in case water burst occur gushes husky situation.
（2）Must possess the protective articles such as gloves, mouth mask, goggles when applying daub.
（3）If accidentally getting glue on skin or clothing, it can be cleaned with acetone and use a large amount of clear water to rinse, if being splashed into accidentally
Eyes, should see a doctor immediately.
The present invention is described in detail above in conjunction with drawings and examples, still, those of skill in the art
Member to the design parameter of each in above-described embodiment it is understood that on the premise of present inventive concept is not departed from, can also carry out
Change, forms multiple specific embodiments, distance of the top away from plane on guide rail of such as slope is 15mm or 25mm, is
The common excursion of the present invention, is no longer described in detail one by one herein.
Claims (10)
1. a kind of big shield launching extensible track combination fixed structure, including including along the multiple of the pre-buried steel loop radial equipartition of portal
Guide rail, the pre-buried steel loop of portal is layed on diaphram wall, it is characterized in that：The guide rail is the one-time formed guide rail of steel plate, is passed through
Perforate rail lower planes and be longitudinally provided with row's diameter and the certain prepared screw-bolt hole of spacing dimension, it is corresponding, along portal pre-buried steel
Ring length direction is provided with row's diameter and the certain guide rail placed hole of spacing dimension, and each guide rail is arranged in respectively by matching successively
High intensity flat head bolt in prepared screw-bolt hole and respective track placed hole is fixed on the pre-buried steel loop of portal, and high intensity tack
Bolt top planes are not higher than plane on guide rail.
2. big shield launching extensible track combination fixed structure according to claim 1, it is characterized in that：Of the guide rail
Slope is provided with rear side of top between portal pre-buried steel ring surface, the top of the slope is less than the upper plane of guide rail；And institute
Distance of the top away from plane on guide rail for stating slope is 15~25mm；Plane is shiny surface on guide rail simultaneously.
3. big shield launching extensible track combination fixed structure according to claim 1, it is characterized in that：The end of the guide rail
High strength cast iron is implanted between end front side and portal pre-buried steel ring surface, to prevent guide rail from moving forward.
4. big shield launching extensible track combination fixed structure according to claim 1, it is characterized in that：The two of the guide rail
Gusset is welded with respectively between side and portal pre-buried steel ring surface, and the top for being welded with gusset is less than the upper plane of guide rail.
5. the big shield launching extensible track combination fixed structure according to any one of Claims 1-4, it is characterized in that：Respectively
Fixed between high intensity flat head bolt set guide rail placed hole inwall corresponding on the pre-buried steel loop of portal by anchoring adhesive.
6. a kind of big shield launching extensible track as claimed in claim 1 combines the construction method of fixed structure, comprising following
Processing step：
（1）Guide rail is processed
The height and width dimensions of guide rail are calculated according to shield machine and portal design size；According to the height and width drawn
Size is spent, is produced once shaping using the steel plate equivalent thick with width dimensions；Make after shaping, reserved on every guide rail certain
One row's bolt hole of diameter and spacing dimension size；
（2）Guide rail is positioned
First according to design requirement, the putting position of guide rail carries out preliminary line positioning in the pre-buried steel loop of portal；Then it is right
Guide rail is laid hole position and positioned, and keeps guide rail placement hole position consistent with set prepared screw-bolt hole hole position on guide rail to be installed,
Fixed with facilitating drilling and installing；
（3）Guide rail is installed and fixed
According to position line, hole position is laid to guide rail and implements to drill；After drilling is finished, anchoring adhesive is injected, after guide rail is put in place,
Hole-specifically quick insertion high intensity flat head bolt is fixed；After fixation, high intensity flat head bolt top planes are not higher than on guide rail
Plane.
7. big shield launching extensible track according to claim 6 combines the construction method of fixed structure, it is characterized in that：
Step（1）In, after prepared screw-bolt hole, plane on guide rail is polished smooth, to reduce frictional force when shield machine is promoted；In step
（3）In, guide rail is laid before hole position implementation drilling, and each guide rail placement hole position is re-started and checked, in order to which guide rail is accurately fixed
Position and installation are fixed；In step（3）In, after drilling is finished, before injection anchoring adhesive, it will be cleaned out in each drilling, to carry
High anchoring strength.
8. the big shield launching extensible track according to claim 6 or 7 combines the construction method of fixed structure, its feature
It is：In step（3）In, after guide rail is installed and be fixed, set on rear side of the initiating terminal of every guide rail between portal pre-buried steel ring surface
Put by being welded with the slope that gusset is constituted, and upper plane of the top less than guide rail of the slope, to facilitate cutterhead upper rail.
9. the big shield launching extensible track according to claim 6 or 7 combines the construction method of fixed structure, its feature
It is：In step（3）In, after guide rail is installed and be fixed, it is implanted on front side of the end of every guide rail between portal pre-buried steel ring surface
There is high strength cast iron to be fixed, to prevent guide rail from moving forward.
10. the big shield launching extensible track according to claim 6 or 7 combines the construction method of fixed structure, its feature
It is：In step（3）In, after guide rail is installed and be fixed, in guide rail two sides by being welded with gusset, by guide rail and the pre-buried steel loop of portal
Fix again, the stable property of guide rail is effectively ensured；And the top of be welded with gusset is less than the upper plane of guide rail.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710458532.3A CN107152290A (en) | 2017-06-16 | 2017-06-16 | Big shield launching extensible track combination fixed structure and its construction method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710458532.3A CN107152290A (en) | 2017-06-16 | 2017-06-16 | Big shield launching extensible track combination fixed structure and its construction method |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN107152290A true CN107152290A (en) | 2017-09-12 |
Family
ID=59795820
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201710458532.3A Pending CN107152290A (en) | 2017-06-16 | 2017-06-16 | Big shield launching extensible track combination fixed structure and its construction method |
Country Status (1)
| Country | Link |
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| CN (1) | CN107152290A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109356599A (en) * | 2018-12-24 | 2019-02-19 | 中铁局集团有限公司 | Shield semi-ring originates construction method under the conditions of a kind of big longitudinal slope |
| CN110219658A (en) * | 2019-07-25 | 2019-09-10 | 中建八局轨道交通建设有限公司 | Prevent shield machine from planting the device and its application method of head |
| CN113309533A (en) * | 2021-06-17 | 2021-08-27 | 中铁十八局集团有限公司 | Open type TBM expanding excavation anti-planting head method |
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| CN206972251U (en) * | 2017-06-16 | 2018-02-06 | 中铁隧道股份有限公司 | Big shield launching extensible track combination fixed structure |
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| GB315975A (en) * | 1928-06-25 | 1929-07-25 | Edward Dollar | Improvements in railway rail joints |
| JP2006316553A (en) * | 2005-05-13 | 2006-11-24 | East Japan Railway Co | Rail fastening device with rail overturning preventing means |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109356599A (en) * | 2018-12-24 | 2019-02-19 | 中铁局集团有限公司 | Shield semi-ring originates construction method under the conditions of a kind of big longitudinal slope |
| CN110219658A (en) * | 2019-07-25 | 2019-09-10 | 中建八局轨道交通建设有限公司 | Prevent shield machine from planting the device and its application method of head |
| CN110219658B (en) * | 2019-07-25 | 2024-04-12 | 中建八局轨道交通建设有限公司 | Device for preventing shield tunneling machine from head planting and use method thereof |
| CN113309533A (en) * | 2021-06-17 | 2021-08-27 | 中铁十八局集团有限公司 | Open type TBM expanding excavation anti-planting head method |
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