CN110344834A - Nearly section water-rich silty sand layers shield machine receives construction method - Google Patents
Nearly section water-rich silty sand layers shield machine receives construction method Download PDFInfo
- Publication number
- CN110344834A CN110344834A CN201910630189.5A CN201910630189A CN110344834A CN 110344834 A CN110344834 A CN 110344834A CN 201910630189 A CN201910630189 A CN 201910630189A CN 110344834 A CN110344834 A CN 110344834A
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- Prior art keywords
- shield
- construction
- stabilization zone
- shield machine
- last
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Classifications
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- 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
- E21D9/001—Improving soil or rock, e.g. by freezing; Injections
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- 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
- E21D9/04—Driving tunnels or galleries through loose materials; Apparatus therefor not otherwise provided for
-
- 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
- E21D9/0607—Making by using a driving shield, i.e. advanced by pushing means bearing against the already placed lining the shield being provided with devices for lining the tunnel, e.g. shuttering
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- 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
- E21D9/0642—Making by using a driving shield, i.e. advanced by pushing means bearing against the already placed lining the shield having means for additional processing at the front end
- E21D9/0671—Making by using a driving shield, i.e. advanced by pushing means bearing against the already placed lining the shield having means for additional processing at the front end with means for consolidating the rock in front of the shield by injection of consolidating substances through boreholes
-
- 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
- E21D9/08—Making by using a driving shield, i.e. advanced by pushing means bearing against the already placed lining with additional boring or cutting means other than the conventional cutting edge of the shield
Abstract
The present invention provides a kind of nearly section water-rich silty sand layers shield machine reception construction method, this method is tunneled in shield machine to before shield end, shield strengthening construction is carried out by three axes agitating pile and high-pressure rotary jet grouting pile in shield end and carries out dewatering construction in shield end, when the cutterhead of shield machine is tunneled to portal, the construction of first time secondary grouting is carried out in the shield tail of shield machine, in the case where shield machine is tunneled to last ring of tunnel, second of secondary grouting construction is carried out in the shield tail of shield machine, after shield machine is detached from last endless tube piece, the gap between last endless tube piece and portal steel loop is blocked with steel plate, and mortar depositing construction is carried out in gap, shield is completed to receive.The method provided through the invention can effectively ensure that the received safety of shield in the nearly section water-rich silty sand layers of shield, and portal is avoided to abolish surface subsidence caused by rear soil erosion and collapsing, reduce the received construction risk of shield water rich strata.
Description
Technical field
The present invention relates to Municipal Engineering Construction fields, and in particular, to a kind of nearly section water-rich silty sand layers shield machine reception
Construction method.
Background technique
Shield method has the features such as construction speed is fast, mechanization degree is high, security performance is strong, is applied by China tunnel at present
Work field is widely applied.With the fast development of urban track traffic, the large quantities of cities in the coastal areas such as China East China, south China are opened
Begin to carry out constructing metro tunnel using shield method.
Coastal area geology is commonly sandy silt soil stratum, and ground, underground water are extremely abundant, in shield launching and receive process
In easily occur because soil erosion cause surface subsidence even collapse the phenomenon that.In the prior art, three axes agitating pile can be passed through
It is reinforced, but consolidation effect is poor, will appear flowing water in portal location of the coring procedure, gushes the problem of sand, can not carry out portal on time
It abolishes, or abolishes completion in portal, carry out the received section of jurisdiction rear portion water in the process of shield and gush out portal sealing, cause to seal
Failure, the serious end regions ground that even results in deforms, collapses.
Summary of the invention
For when sandy silt soil stratum carries out shield-tunneling construction, being easy to appear soil erosion, seal failure shows in the prior art
As, cause consolidation effect poor, shield end ground deformation, collapse the technical issues of, the present invention provides a kind of nearly section rich waters
Silty sand ground shield machine receives construction method, using this method it is possible to prevente effectively from portal to abolish ground caused by rear soil erosion heavy
Drop and collapsing reduce shield and receive risk, shorten construction period, guarantee construction safety.
To achieve the above object, it includes following that nearly section water-rich silty sand layers shield machine provided by the invention, which receives construction method,
Step: in the case where shield machine is apart from the shield end pre-determined distance, according to the size of shield machine in the shield end
Determine shield stabilization zone；Shield strengthening construction is carried out by three axes agitating pile and high-pressure rotary jet grouting pile in the shield stabilization zone；?
Tunnel two sides set multiple dewatering wells with preset interval；In the case where the shield cutter of the shield machine is tunneled to portal, stop
Only shield driving carries out the construction of first time secondary grouting in the shield tail of the shield machine；It constructs in the first time secondary grouting
After completion, continue the shield driving；In the case where the shield machine is tunneled to last ring of the tunnel, described in stopping
Shield driving carries out second of secondary grouting construction in the shield tail of the shield machine；It has constructed in second of secondary grouting
At the shield driving later, is continued, until the shield tail of the shield machine is detached from last endless tube piece and reaches shield reception bracket；
Gap between last described endless tube piece and portal steel loop is blocked using steel plate；In last described endless tube piece and the portal steel
Mortar depositing construction is carried out in the gap of interannular, to complete shield reception.
Further, described to be applied in the shield stabilization zone by three axes agitating pile and high-pressure rotary jet grouting pile progress shield reinforcing
Work, comprising: the shield stabilization zone is in turn divided into the first stabilization zone and the second stabilization zone along tunnel piercing direction；Exist respectively
First stabilization zone carries out three axes agitating pile construction, carries out Construction of High Pressure Jet Grouting Pile in second stabilization zone.
Further, described to carry out three axes agitating pile construction in first stabilization zone, comprising: by first stabilization zone
First weak stabilization zone is divided by earth's surface to tunnel inverted arch next coming in order and including the last the first stabilization zone in the tunnel；Respectively
Three axes agitating pile construction is carried out in the last the first stabilization zone and the first weak stabilization zone, wherein the last the first stabilization zone
Cement mixing content is 20%, and the cement mixing content of the first weak stabilization zone is 7%.
Further, two neighboring three axes agitating pile mutually overlaps a hole.
Further, the method also includes: the shield stabilization zone by three axes agitating pile and high-pressure rotary jet grouting pile into
After row shield strengthening construction, before the tunnel two sides set multiple dewatering wells with preset interval: vertical in the portal
Set multiple coring holes；Detect the compression strength and infiltration coefficient of the Kong Xin in the coring hole；It is greater than in the compression strength
In the case that preset strength and infiltration coefficient are less than preset value, successively installed from inside to outside in the coring hole described for observing
The detection pipe and valve of portal geological condition.
Further, the shield tail in the shield machine carries out the construction of first time secondary grouting, comprising: in the shield
The second ring and third ring of machine shield tail carry out the first time secondary grouting construction；The shield tail in the shield machine carries out
Second of secondary grouting construction, comprising: carried out in the second ring and third ring of the shield machine shield tail described secondary for the second time
Mortar depositing construction.
Further, the injection slurry of the first time secondary grouting construction and second of secondary grouting construction includes
Cement and waterglass.
Further, the method also includes: blocked between last described endless tube piece and portal steel loop using steel plate
After gap, in the gap between last described endless tube piece and the portal steel loop before progress mortar depositing construction: in institute
It states and opens up gas vent on steel plate；In valve of the gas vent installation for exhaust.
The technical solution provided through the invention, the present invention at least have the following technical effect that
Nearly section water-rich silty sand layers shield machine of the invention receives construction method, shield machine tunnel to shield end it
Before, shield strengthening construction is carried out by three axes agitating pile and high-pressure rotary jet grouting pile in shield end and carries out precipitation in shield end
Construction carries out the construction of first time secondary grouting in the shield tail of shield machine, in shield machine when the cutterhead of shield machine is tunneled to portal
In the case where driving to last ring of tunnel, second of secondary grouting construction is carried out in the shield tail of shield machine, is detached from shield machine
After last endless tube piece, the gap between last endless tube piece and portal steel loop is blocked with steel plate, and slip casting is carried out in gap
Construction is completed shield and is received.The method provided through the invention can effectively ensure that shield in the nearly section water-rich silty sand layers of shield
Received safety effectively avoids portal from abolishing surface subsidence caused by rear soil erosion and collapsing, reduces shield water rich strata
Received construction risk, effective guarantee shield machine receive safely.
Other features and advantages of the present invention will the following detailed description will be given in the detailed implementation section.
Detailed description of the invention
Fig. 1 is the flow chart that nearly section water-rich silty sand layers shield machine provided in an embodiment of the present invention receives construction method；
Fig. 2 is secondary for the first time in nearly section water-rich silty sand layers shield machine reception construction method provided in an embodiment of the present invention
The schematic diagram of slip casting；
Fig. 3 is secondary for the second time in nearly section water-rich silty sand layers shield machine reception construction method provided in an embodiment of the present invention
The schematic diagram of slip casting；
Fig. 4 is that nearly section water-rich silty sand layers shield machine provided in an embodiment of the present invention receives the first weak reinforcing in construction method
The schematic diagram in area and the last the first stabilization zone.
Specific embodiment
It is described in detail below in conjunction with specific embodiment of the attached drawing to the embodiment of the present invention.It should be understood that this
Locate described specific embodiment and be merely to illustrate and explain the present invention embodiment, is not intended to restrict the invention embodiment.
It should be noted that in the absence of conflict, the feature in embodiment and embodiment in the present invention can phase
Mutually combination.
In the present invention, in the absence of explanation to the contrary, the noun of locality used such as " upper and lower, top, bottom " is usually needle
For direction shown in the drawings either for it is vertical, on vertical or gravity direction for each component mutual alignment relation
Word is described.
The present invention will be described in detail below with reference to the accompanying drawings and embodiments.
Fig. 1-Fig. 3 is please referred to, the embodiment of the present invention provides a kind of nearly section water-rich silty sand layers shield machine reception construction method,
Method includes the following steps: S101: in the case where shield machine is apart from the shield end pre-determined distance, according to shield machine
Size determines shield stabilization zone in the shield end；S102: it is revolved in the shield stabilization zone by three axes agitating pile and high pressure
It sprays stake and carries out shield strengthening construction；S103: multiple dewatering wells are set with preset interval in tunnel two sides；S104: in the shield
In the case that the shield cutter of machine is tunneled to portal, stop shield driving, is carried out in the shield tail of the shield machine secondary for the first time
Mortar depositing construction；S105: after first time secondary grouting construction is completed, continue the shield driving；S106: in the shield
In the case that structure machine is tunneled to last ring of the tunnel, stop the shield driving, carries out the in the shield tail of the shield machine
Secondary secondary grouting construction；S107: after second of secondary grouting construction is completed, continuing the shield driving, until
The shield tail of the shield machine is detached from last endless tube piece and reaches shield reception bracket；S108: using steel plate block it is described last
Gap between endless tube piece and portal steel loop；S109: it is carried out in the gap between last described endless tube piece and the portal steel loop
Mortar depositing construction, to complete shield reception.
Specifically, in embodiment of the present invention, before shield machine reaches shield end, according to the size of shield machine in shield
Structure end determines shield stabilization zone, and shield stabilization zone is greater than the head length of shield in the length of tunneling direction, perpendicular to pick
It is greater than the width in tunnel into the length in direction.The a length of 9.6m of the shield body of shield machine in the embodiment of the present invention, therefore shield stabilization zone
It is set as 12m in the length of tunneling direction.Pass through three axes agitating pile respectively in shield stabilization zone and high-pressure rotary jet grouting pile carries out shield
Strengthening construction improves the soil structures in shield stabilization zone, improves uniformity, leakproofness and the independence of the stabilization zone soil body.It
Multiple dewatering wells are set in tunnel two sides afterwards, carry out dewatering construction before shield machine reaches shield end, guaranteed water level is in tunnel
1 meter below road bottom, shield machine could tunnel shield end.
Shield machine is promoted through shield stabilization zone, until shield machine is shut down, in shield tail when cutterhead top to the portal of shield machine
First time after-teeming slurry is carried out from the bottom to top, and the underground water outside shield stabilization zone is isolated.First time, secondary grouting was (in the present embodiment
Secondary grouting be synchronous grouting after benefit mortar depositing construction) complete after, determine it is anhydrous in shield soil storehouse after, continue shield pick
Into, start carry out portal abolish construction.It tunnels to last ring shield tail of tunnel in the shield tail of shield machine also without departing from shield duct piece
When, stop shield machine driving, carries out second of after-teeming slurry from the bottom to top in shield tail, block the water at section of jurisdiction rear portion, prevent shield
There is soil erosion situation after being detached from section of jurisdiction in machine.After second of secondary grouting construction is completed, continue shield driving, until shield
The shield tail of structure machine is detached from last endless tube piece and reaches shield reception bracket.Then between last endless tube piece and portal steel loop between
Gap is blocked at gap using plurality of steel plates, the outer diameter of steel plate is equal to steel loop internal diameter, and internal diameter is with can be with section of jurisdiction
Welding is advisable, and carries out mortar depositing construction to gap, prevents water and soil from flowing out out of gap.
The method provided through the invention can effectively avoid surface subsidence caused by soil erosion in shield receive process
And collapse, guarantee the received safety of shield in the nearly section water-rich silty sand layers of shield, reduces the received construction of shield water rich strata
Risk.
Further, described to be applied in the shield stabilization zone by three axes agitating pile and high-pressure rotary jet grouting pile progress shield reinforcing
Work, comprising: the shield stabilization zone is in turn divided into the first stabilization zone and the second stabilization zone along tunnel piercing direction；Exist respectively
First stabilization zone carries out three axes agitating pile construction, carries out Construction of High Pressure Jet Grouting Pile in second stabilization zone.
Specifically, in embodiment of the present invention, shield stabilization zone edge is in turn divided into first along tunnel piercing direction and is added
Gu Qu and the second stabilization zone.First stabilization zone carries out three axis close to portal, in the first stabilization zone close to shield machine, the second stabilization zone
Mixing pile construction carries out Construction of High Pressure Jet Grouting Pile in the second stabilization zone.
The method provided through the invention can improve the soil body situation of shield end, prevent outside shield end region
The underground water in shield end region is reduced in Groundwater infiltration shield end region, occurs flowing water when preventing shield from receiving, gushes sand and ask
Topic guarantees that shield receives safely.
Further, described to carry out three axes agitating pile construction in first stabilization zone, comprising: by first stabilization zone
First weak stabilization zone is divided by earth's surface to tunnel inverted arch next coming in order and including the last the first stabilization zone in the tunnel；Respectively
Three axes agitating pile construction is carried out in the last the first stabilization zone and the first weak stabilization zone, wherein the last the first stabilization zone
Cement mixing content is 20%, and the cement mixing content of the first weak stabilization zone is 7%.
Referring to FIG. 4, specifically, in embodiment of the present invention, the first stabilization zone be divided into from top to bottom first it is weak plus
Gu Qu and the last the first stabilization zone region Liang Ge, the first weak stabilization zone include earth's surface to the region of tunnel vault, and cement mixing content is
7%.The last the second stabilization zone includes the region of tunnel vault to tunnel inverted arch or less 3m, cement mixing content 20%.
The method provided through the invention reinforces to divide into first and forces Gu Qu and weak stabilization zone and can guarantee to reinforce
The usage amount that cement is reduced while effect, reduces construction cost.
Further, two neighboring three axes agitating pile mutually overlaps a hole.
Specifically, in embodiment of the present invention, three axes agitating pile construction is carried out in such a way that the first stabilization zone is beaten using set,
Adjacent two three axes agitating piles mutually overlap a hole, to improve the pile quality of three axes agitating pile.
Further, the method also includes: the shield stabilization zone by three axes agitating pile and high-pressure rotary jet grouting pile into
After row shield strengthening construction, before the tunnel two sides set multiple dewatering wells with preset interval: vertical in the portal
Set multiple coring holes；Detect the compression strength and infiltration coefficient of the Kong Xin in the coring hole；It is greater than in the compression strength
In the case that preset strength and infiltration coefficient are less than preset value, successively installed from inside to outside in the coring hole described for observing
The detection pipe and valve of portal geological condition.
Specifically, in embodiment of the present invention, after carrying out strengthening construction to shield end, multiple take is set in portal
Core bore, and the compression strength and infiltration coefficient of detection hole core are more than or equal to 0.8mPa in compression strength, and infiltration coefficient is less than or equal to
1*10-7When cm/s, determine that shield strengthening construction complies with standard.Detection pipe and valve are installed in the position in coring hole later, then beaten
If dewatering well.Shield machine can open valve before abolishing portal, whether coring hole in there are flowing out, if not having in coring hole if detecting
It there are flowing out, then it represents that it is anhydrous in native storehouse, progress portal can be started and abolish construction.
The method provided through the invention can facilitate and detect to shield consolidation effect.
Further, the shield tail in the shield machine carries out the construction of first time secondary grouting, comprising: in the shield
The second ring and third ring of machine shield tail carry out the first time secondary grouting construction；The shield tail in the shield machine carries out
Second of secondary grouting construction, comprising: carried out in the second ring and third ring of the shield machine shield tail described secondary for the second time
Mortar depositing construction.
Further, the injection slurry of the first time secondary grouting construction and second of secondary grouting construction includes
Cement and waterglass.
Further, the method also includes: blocked between last described endless tube piece and portal steel loop using steel plate
After gap, in the gap between last described endless tube piece and the portal steel loop before progress mortar depositing construction: in institute
It states and opens up gas vent on steel plate；In valve of the gas vent installation for exhaust.
Specifically, in embodiment of the present invention, after blocking the gap between last endless tube piece and portal steel loop, in steel
Multiple gas vents are opened up on plate, and valve is installed in gas vent, when carrying out mortar depositing construction to gap, Open valve, benefit
Be discharged in by the air in gap, facilitate smooth slip casting, and can by gas vent and valve detection, whether slip casting is completed,
Having in valve, which can determine in gap when injection slurry outflow, has been filled with full injection slurry.
It is described the prefered embodiments of the present invention in detail above in conjunction with attached drawing, still, the present invention is not limited to above-mentioned realities
The detail in mode is applied, within the scope of the technical concept of the present invention, a variety of letters can be carried out to technical solution of the present invention
Monotropic type, these simple variants all belong to the scope of protection of the present invention.
It is further to note that specific technical features described in the above specific embodiments, in not lance
In the case where shield, can be combined in any appropriate way, in order to avoid unnecessary repetition, the present invention to it is various can
No further explanation will be given for the combination of energy.
In addition, various embodiments of the present invention can be combined randomly, as long as it is without prejudice to originally
The thought of invention, it should also be regarded as the disclosure of the present invention.
Claims (8)
1. a kind of nearly section water-rich silty sand layers shield machine receives construction method, which is characterized in that the described method includes:
It is true in the shield end according to the size of shield machine in the case where shield machine is apart from the shield end pre-determined distance
Determine shield stabilization zone；
Shield strengthening construction is carried out by three axes agitating pile and high-pressure rotary jet grouting pile in the shield stabilization zone；
Multiple dewatering wells are set with preset interval in tunnel two sides；
In the case where the shield cutter of the shield machine is tunneled to portal, stop shield driving, in the shield tail of the shield machine
Carry out the construction of first time secondary grouting；
After first time secondary grouting construction is completed, continue the shield driving；
In the case where the shield machine is tunneled to last ring of the tunnel, stop the shield driving, in the shield machine
Shield tail carry out second of secondary grouting construction；
After second of secondary grouting construction is completed, continue the shield driving, until the shield tail of the shield machine is de-
Shield, which is reached, from last endless tube piece receives bracket；
Gap between last described endless tube piece and portal steel loop is blocked using steel plate；
Mortar depositing construction is carried out in gap between last described endless tube piece and the portal steel loop, to complete shield reception.
2. the method according to claim 1, wherein it is described in the shield stabilization zone by three axes agitating pile and
High-pressure rotary jet grouting pile carries out shield strengthening construction, comprising:
The shield stabilization zone is in turn divided into the first stabilization zone and the second stabilization zone along tunnel piercing direction；
Three axes agitating pile construction is carried out in first stabilization zone respectively, high-pressure rotary jet grouting pile is carried out in second stabilization zone and applies
Work.
3. according to the method described in claim 2, it is characterized in that, described apply in first stabilization zone progress three axes agitating pile
Work, comprising:
First stabilization zone by earth's surface to tunnel inverted arch next coming in order is divided into the first weak stabilization zone and including the tunnel
The last the first stabilization zone in road；
Three axes agitating pile construction is carried out in the last the first stabilization zone and the first weak stabilization zone respectively, wherein the last the first
The cement mixing content of stabilization zone is 20%, and the cement mixing content of the first weak stabilization zone is 7%.
4. according to the method described in claim 3, it is characterized in that, two neighboring three axes agitating pile mutually overlaps a hole.
5. the method according to claim 1, wherein the method also includes:
After the shield stabilization zone carries out shield strengthening construction by three axes agitating pile and high-pressure rotary jet grouting pile, in the tunnel
Two sides are set with preset interval before multiple dewatering wells:
Multiple coring holes are vertically set in the portal；
Detect the compression strength and infiltration coefficient of the Kong Xin in the coring hole；
In the case where the compression strength is greater than preset strength and infiltration coefficient and is less than preset value, the coring hole from it is interior to
Detection pipe and valve for observing the portal geological condition is successively installed outside.
6. the method according to claim 1, wherein
The shield tail in the shield machine carries out the construction of first time secondary grouting, comprising:
The first time secondary grouting construction is carried out in the second ring and third ring of the shield machine shield tail；
The shield tail in the shield machine carries out second of secondary grouting construction, comprising:
Second of secondary grouting construction is carried out in the second ring and third ring of the shield machine shield tail.
7. according to the method described in claim 6, it is characterized in that, first time secondary grouting construction and described second
The injection slurry of secondary grouting construction includes cement and waterglass.
8. the method according to claim 1, wherein the method also includes:
It is described in last described endless tube after blocking the gap between last described endless tube piece and portal steel loop using steel plate
In gap between piece and the portal steel loop before progress mortar depositing construction:
Gas vent is opened up on the steel plate；
In valve of the gas vent installation for exhaust.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201910630189.5A CN110344834A (en) | 2019-07-12 | 2019-07-12 | Nearly section water-rich silty sand layers shield machine receives construction method |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910630189.5A CN110344834A (en) | 2019-07-12 | 2019-07-12 | Nearly section water-rich silty sand layers shield machine receives construction method |
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| CN110344834A true CN110344834A (en) | 2019-10-18 |
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Cited By (5)
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| CN111396067A (en) * | 2020-03-30 | 2020-07-10 | 中铁十二局集团有限公司 | Comprehensive shield steel sleeve receiving construction method in complex environment |
| CN111411970A (en) * | 2020-03-25 | 2020-07-14 | 中铁三局集团有限公司 | Shield starting construction method under water-rich sand layer geological condition |
| CN111734420A (en) * | 2020-06-16 | 2020-10-02 | 中建三局基础设施建设投资有限公司 | Water-rich stratum shield underwater receiving method provided with tunnel portal mortar retaining wall |
| CN112031794A (en) * | 2020-09-11 | 2020-12-04 | 中铁四局集团第二工程有限公司 | Shield receiving construction method for approaching existing subway operation line in water-rich silt stratum |
| CN114960711A (en) * | 2021-02-24 | 2022-08-30 | 中交隧道工程局有限公司 | End reinforcement construction method based on shield tunneling |
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Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN111411970A (en) * | 2020-03-25 | 2020-07-14 | 中铁三局集团有限公司 | Shield starting construction method under water-rich sand layer geological condition |
| CN111411970B (en) * | 2020-03-25 | 2022-05-13 | 中铁三局集团有限公司 | Shield starting construction method under geological condition of water-rich sand layer |
| CN111396067A (en) * | 2020-03-30 | 2020-07-10 | 中铁十二局集团有限公司 | Comprehensive shield steel sleeve receiving construction method in complex environment |
| CN111734420A (en) * | 2020-06-16 | 2020-10-02 | 中建三局基础设施建设投资有限公司 | Water-rich stratum shield underwater receiving method provided with tunnel portal mortar retaining wall |
| CN111734420B (en) * | 2020-06-16 | 2021-11-12 | 中建三局基础设施建设投资有限公司 | Water-rich stratum shield underwater receiving method provided with tunnel portal mortar retaining wall |
| CN112031794A (en) * | 2020-09-11 | 2020-12-04 | 中铁四局集团第二工程有限公司 | Shield receiving construction method for approaching existing subway operation line in water-rich silt stratum |
| CN114960711A (en) * | 2021-02-24 | 2022-08-30 | 中交隧道工程局有限公司 | End reinforcement construction method based on shield tunneling |
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