CN106978821A - A kind of soft soil layer reduces shield driving and applies method to the retaining design that building foundation influences - Google Patents
A kind of soft soil layer reduces shield driving and applies method to the retaining design that building foundation influences Download PDFInfo
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- CN106978821A CN106978821A CN201710314959.6A CN201710314959A CN106978821A CN 106978821 A CN106978821 A CN 106978821A CN 201710314959 A CN201710314959 A CN 201710314959A CN 106978821 A CN106978821 A CN 106978821A
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D29/00—Independent underground or underwater structures; Retaining walls
- E02D29/045—Underground structures, e.g. tunnels or galleries, built in the open air or by methods involving disturbance of the ground surface all along the location line; Methods of making them
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- Mining & Mineral Resources (AREA)
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- General Engineering & Computer Science (AREA)
- Structural Engineering (AREA)
- Consolidation Of Soil By Introduction Of Solidifying Substances Into Soil (AREA)
Abstract
Shield driving is reduced the invention discloses a kind of soft soil layer method is applied on the retaining design that building foundation influences, belong to building engineering field.Using pipe isolation pile and mini-valve tube in building and the men working ahead of tunneling direction side, one of curtain wall protection building safety and stability when subway is tunneled is formed.Of the invention main using main structure of the steel-pipe pile as curtain wall, using the construction of unidirectional mini-valve tube between steel-pipe pile, its purpose mainly applies curtain wall construction together between tunneling direction and building basis.To the protection of existing building in shield tunneling process is overcome; ensure the safety of shallow earthing section shield crossing building; curtain wall together with longitudinally being formed along tunnel between building and tunnel; to the active force of the soil body under building during decay shield driving; the safety of the excessively shallow earthing section building of Stratum Loss caused by gap and the sedimentation after soil disturbance and shield is reduced by stress isolation; the present invention have it is simple and quick effectively, generalization is strong, it is practical the features such as.
Description
Technical field
Shield driving is reduced the present invention relates to a kind of soft soil layer method is applied on the retaining design that building foundation influences, belong to
In subway work technical field.
Background technology
Subway driving is passed through group's building and is reinforced using steel pipe isolation pile weakness zone, adds mini-valve tube construction to be in tunneling process
In protection to existing building, it is ensured that the safety of shallow earthing section shield crossing building, along tunnel longitudinal direction building and tunnel it
Between form one of curtain wall, to the active force of the soil body under building during decay shield driving, reduced by stress isolation caused by gap
The safety of the excessively shallow earthing section building of sedimentation and shield after Stratum Loss and soil disturbance.
The content of the invention
The invention of the present invention is main using main structure of the steel-pipe pile as curtain wall, and unidirectional mini-valve tube is used between steel-pipe pile
Construction, its purpose mainly applies curtain wall construction together between tunneling direction and building basis.Overcoming shield tunneling process
In protection to existing building, it is ensured that the safety of shallow earthing section shield crossing building, along tunnel longitudinal direction building and tunnel it
Between form one of curtain wall, to the active force of the soil body under building during decay shield driving, reduced by stress isolation caused by gap
The safety of the excessively shallow earthing section building of sedimentation and shield after Stratum Loss and soil disturbance.
A kind of soft soil layer of the technical solution adopted by the present invention reduces the retaining design that shield driving influences on building foundation
Method is applied, this method comprises the following steps.
Firstth, the early-stage preparations of passing through building
Plant equipment：Slewing drilling machine, slip casting machine, mixer, geological drilling rig, Grouting Pipe, the unidirectional mini-valve tubes of Ф 50mm, whitewashing
Pipe Ф 20mm, anti-high pressure feed pipe for mortar.
Injecting paste material：Injecting paste material is dual slurry, using 42.5 grades of Portland cements.The ratio of mud of cement mortar is 1:
1, cement mortar：Waterglass=1:1.
Secondth, the basic curtain wall protective treatment of passing through building, including：Steel-pipe pile 1 is constructed, mini-valve tube 2 is constructed and mini-valve tube 2
Slip casting.It is that the two ends of existing building are set in tunneling process to be reinforced using the isolation weakness zone of steel-pipe pile 1 with the construction of mini-valve tube 2
Put cornerite, the curtain wall together with the connection formation of mini-valve tube 2 of steel-pipe pile 1.Mini-valve tube 2 is unidirectional.
Constructed between steel-pipe pile 1 using unidirectional mini-valve tube 2, the building foundation safety in protection tunneling process.Wherein steel
Pile tube deeply tunnels 2~3m below tunnel, unidirectional mini-valve tube 2 and gos deep into the following 1~2m in groups of building basis and sleeve grouting and reinforcing, tool
Body is implemented as follows：
1) steel-pipe pile 1 is constructed
S1, fixed pile and rig are constructed in place.
S2, pipe-following drilling：Tripping in sleeve pipe is rotated in drilling, then drilling tool follows drilling, suitable after under drilling tool to bottom hole
When clockwise rotates, reamer is from center deviation and with drill bit synchronous rotary, and the aperture got out is placed on pipe sleeve external diameter, therefore set
Pipe realizes pipe-following drilling with declining before drill bit and then therewith., it is necessary to lift drilling tool, now after drilling tool sets absolute altitude
By drilling tool counterclockwise rotates one week, reamer was drawn in the presence of bit central eccentric shaft to center, that is, passes through sleeve pipe
And propose drilling tool outside hole, sleeve pipe is stayed in hole.Speed when just starting to spud in is slow, is used when drilling reaches after 1.5m~2m
Normal speed creeps into ensure pile precision.
S3, steel pipe manufacturing and placement；Sleeve pipe uses internal diameter Ф 150mm, wall thickness 4.5mm seamless steel pipes, 2m is often saved, with electric welding
Connection.Installed by the way of pipe-following drilling.
2) mini-valve tube 2 is constructed, and mini-valve tube structure is shown in Fig. 3.
Mini-valve tube 2 includes PVC Grouting Pipes 3, centring ring 4, Grouting Pipe perforate 5, the first connector 6, the first slurry check ring 7, steel
Pipe perforate 8, the second slurry check ring 9, single ported thermostatic expansion valve 10, the second connector 11, steel pipe 12, sharp bottom 13；
Steel pipe 12 is arranged on inside PVC Grouting Pipes 3, and steel pipe 12 passes through the first connector respectively up and down with PVC Grouting Pipes 3
6th, the first slurry check ring 7 and the second connector 11, the second slurry check ring 9 are connected, and the first slurry check ring 7 is connected with the first connector 6, and second
Connector 11 is connected with the second slurry check ring 9.Grouting Pipe perforate 5 is arranged at the circumferential position of PVC Grouting Pipes 3, Grouting Pipe perforate 5
Single ported thermostatic expansion valve 10 is installed, the outside of single ported thermostatic expansion valve 10 is provided with centring ring 4；Steel pipe perforate 8 is arranged on steel pipe 12；Sharp bottom 13
It is arranged on the bottom of PVC Grouting Pipes 3.
S1, boring positioning：According to the control point laid, the coordinate position for drawing hole is calculated, total powerstation bleed hole is used
Position, measures ground elevation, it is determined that drawing hole depth with spirit level.
S2, drilling and forming hole：Using mud off, aperture 91mm；
S3, cast sleeve shell material：Sleeve shell material match ratio is：Cement：Soil：Water=50kg：75kg：94kg；Sleeve shell material injection side
Method：20mm Grouting Pipe tripping in bottom holes, with grouting pump from material feeding steel pipe hand-hole bottom.
S4, lower mini-valve tube：Lower mini-valve tube include lower sleeve shell material, lower mini-valve tube and connect, drill seal etc. work.Sleeve shell material
Prepare in proportion, lower mini-valve tube after mud in hole is replaced；Being completely embedded of mini-valve tube, ensure without disconnecting phenomenon, mini-valve tube
Tripping in is to bottom hole, and lower tip is with taper plug.
S5, sealing：Ground around aperture is blocked to below ground 1m in orientation using accelerated cement, to prevent
Only during slip casting grout phenomenon generation.
S6, lower core pipe；First check casting head situation, it is ensured that check valve it is in good condition；Pipeline is without clogging, each section
The quality of connection of pipeline is reliable；If mini-valve tube is blocked, first carry out washing pipe, it is ensured that core pipe is transferred to bottom hole.
3) sleeve valve barrel grouting
S1, slurries make：The match ratio mixing slurries provided by design, the proportion of slurries meets the requirements, and additive is by setting
The parameter that meter is determined is added, to ensure the preparation quality of cement grout.
S2, drive slip casting machine：All work all carry out after open slip casting machine carry out slip casting, during slip casting by listening,
See pressure, see grouting amount to judge the implementation result of slip casting；Whether listening has exception, sees whether pressure is too high, sees grouting amount
The injection rate of design whether is reached, when the injection rate that sound is without exception, pressure is not too high, grouting amount reaches design, starts slip casting
And carry out slip casting record.
S3, biliquid mixing：Two fluid grouting controls the setting time of slurries in 60~120s, according to slip casting requirement and effect
Difference, by adjusting the proportioning of slurries and the concentration proportion of cement liquid, to adjust the setting time of slurries.Dual slurry is in note
Mixed at the blender of pulp grinder, slurries ratio is 1：1.
S4, slip casting：Take by a point sequence hole segmented slip casting from bottom to top, every section of slip casting length turns into slip casting step pitch.Slip casting
Step pitch chooses 0.6~1m, is so effectively reduced influence of layer inhomogeneity to slip casting effect.During slip casting, every section of slip casting
After the completion of core pipe above carry, slip casting core pipe above carry be pressure rise, reach grouting amount when carry out, core zinc pipe is carried above and is exerted oneself
Uniformly, core pipe length quick in time and that a step pitch is moved up or down by the step pitch of setting.Often complete 3~4m slip castings
Length will dismiss a section slip casting core pipe.
Carried on S5, core pipe：Slip casting core pipe above carry be pressure rise, reach grouting amount when carry out, above put forward core pipe and exert oneself
Uniformly, in time quickly and by the progress of uniform step pitch.
S6, eventually filling standard：Reach design grouting pressure, grouting and reinforcing section midge amount<2L/min voltage stabilizings 15min is filled eventually.
Compared with prior art, the present invention has the advantages that.
The present invention is using pipe isolation pile with mini-valve tube in building and the men working ahead of tunneling direction side, one of curtain wall guarantor of formation
Protect building safety and stability when subway is tunneled.The present invention realizes a kind of soft soil layer and reduces shield driving to building foundation shadow
Ring, and intact save building.The present invention is protected to passing through groups of building during metro shield to building, is had
It is simple and quick effectively, generalization is strong, it is practical the features such as.
Brief description of the drawings
Fig. 1 reinforces plan to pass through groups of building.
Fig. 2 reinforces cross-sectional view to pass through groups of building.
Fig. 3 is the structure chart that mini-valve tube is constructed.
In figure：1st, steel-pipe pile, 2, mini-valve tube, 3, PVC Grouting Pipes, 4, centring ring, 5, Grouting Pipe perforate, the 6, first connection
Part, the 7, first slurry check ring, 8, steel pipe perforate, the 9, second slurry check ring, 10, single ported thermostatic expansion valve, 11, connector, 12, steel pipe, 13, point
Bottom.
Embodiment
The main main structure that curtain wall is done using steel-pipe pile of the invention, is constructed between steel-pipe pile using unidirectional mini-valve tube, with
Protect the building foundation safety in tunneling process.Wherein steel-pipe pile deeply tunnels 2~3m below tunnel, unidirectional sleeve and deeply built
Following 1~the 2m in group basis and sleeve grouting and reinforcing, are embodied as follows：
(1) steel pipe pile driving construction
1st, fixed pile and rig are constructed in place.
2nd, pipe-following drilling:Creep into while rotating tripping in sleeve pipe, then drilling tool follows drilling, when under drilling tool arrive bottom hole
Afterwards, when being rotated clockwise, expand pocket and deviate to come from center, with drill bit synchronous rotary, the aperture as a result got out is placed on pipe
External diameter is covered, therefore sleeve pipe realizes pipe-following drilling with declining before drill bit and then therewith.When drilling tool set absolute altitude after, it is necessary to
Drilling tool is lifted, now by drilling tool counterclockwise rotates once, reamer is received in the presence of bit central eccentric shaft to center
Hold together, you can drilling tool is proposed outside hole by sleeve pipe, sleeve pipe is stayed in hole.It is suitably slow when just spudding in, when drilling reaches
It can ensure pile precision with normal speed drilling after 1.5m~2m.
3rd, steel pipe manufacturing and placement；Sleeve pipe uses internal diameter Ф 150mm, wall thickness 4.5mm seamless steel pipes, 2m is often saved, with electric welding
Connection.Installed by the way of pipe-following drilling.
(2) mini-valve tube is constructed, and mini-valve tube structure is shown in Fig. 3
1st, boring positioning：According to the control point laid carefully, the coordinate position for drawing hole is calculated, total powerstation bleed hole is used
Position, measures ground elevation, it is determined that drawing hole depth with spirit level.
2nd, drilling and forming hole：Using mud off, aperture 91mm；
3rd, sleeve shell material is poured into a mould：Sleeve shell material match ratio is：Cement：Soil：Water=50kg：75kg：94kg；Sleeve shell material injection side
Method：20mm Grouting Pipe tripping in bottom holes, with grouting pump from material feeding steel pipe hand-hole bottom.
4th, lower mini-valve tube：Lower mini-valve tube include lower sleeve shell material, lower mini-valve tube and connect, drill seal etc. work.Sleeve shell material
Prepare in proportion, lower mini-valve tube after mud in hole is replaced；Being completely embedded of mini-valve tube, ensure without disconnecting phenomenon, mini-valve tube
Tripping in is to bottom hole, and lower tip is with taper plug.
5th, seal：Ground around aperture is blocked to below ground 1m in orientation using accelerated cement, to prevent
Only during slip casting grout phenomenon generation.
6th, lower core pipe；First check casting head situation, it is ensured that check valve it is in good condition；Pipeline is without clogging, each section
The quality of connection of pipeline is reliable；If mini-valve tube is blocked, first carry out washing pipe, it is ensured that core pipe is transferred to bottom hole.
(3) sleeve valve barrel grouting
1st, slurries make：The match ratio mixing slurries provided by design, the proportion of slurries meets the requirements, and additive is by experiment
The parameter that personnel determine is added, to ensure the preparation quality of cement grout.
2nd, slip casting machine is driven：Slip casting machine, which is driven, after all work are all carried out carries out slip casting, it is main by listening sound during slip casting
Sound, see pressure, see grouting amount to judge the implementation result of slip casting；Whether listening has exception, sees whether pressure is too high, sees slip casting
Whether amount reaches the injection rate of design；Field technician carries out slip casting record.
3rd, biliquid is mixed：Two fluid grouting is typically controlled the setting time of slurries in 60~120s, mainly will according to slip casting
The difference of summation effect, by adjusting the proportioning of slurries and the concentration proportion of cement liquid, to adjust the setting time of slurries.Biliquid
Slurry is mixed at the blender of slip casting machine, and theoretical sizing liquor ratio is 1：1, but sometimes due to some reasons of slip casting machine,
Ratio difference can be caused larger.Therefore often done experiment by scene, take slurries to do experiment at blender if necessary, to protect
Demonstrate,prove the rational grout cures time.
4th, slip casting：Take by a point sequence hole segmented slip casting from bottom to top, every section of slip casting length turns into slip casting step pitch.Slip casting is walked
0.6~1m is chosen away from general, influence of layer inhomogeneity to slip casting effect can be so effectively reduced.During slip casting, often
Section slip casting after the completion of core pipe above carry, slip casting core pipe above carry usually pressure rise, reach grouting amount when carry out, carry above
Core zinc pipe is exerted oneself core pipe length uniform, quick in time and that a step pitch is moved up or down by certain step pitch.Often complete
3~4m slip castings length will dismiss a section slip casting core pipe.
5th, carried in core pipe：Slip casting core pipe above carry usually pressure rise, reach grouting amount when carry out, above carry core pipe use
Power is uniform, quick in time and by certain step pitch.
6th, standard is filled eventually：Reach design grouting pressure, grouting and reinforcing section midge amount<2L/min voltage stabilizings 15min is filled eventually.
Claims (1)
1. a kind of soft soil layer reduces shield driving and applies method to the retaining design that building foundation influences, it is characterised in that：This
Method comprises the following steps；
Firstth, the early-stage preparations of passing through building
Plant equipment：Slewing drilling machine, slip casting machine, mixer, geological drilling rig, Grouting Pipe, the unidirectional mini-valve tubes of Ф 50mm, shotcrete pipe Ф
20mm, anti-high pressure feed pipe for mortar；
Injecting paste material：Injecting paste material is dual slurry, using 42.5 grades of Portland cements；The ratio of mud of cement mortar is 1:1, water
Mud：Waterglass=1:1；
Secondth, the basic curtain wall protective treatment of passing through building, including：Steel-pipe pile (1) construction, mini-valve tube (2) construction and mini-valve tube
(2) slip casting；It is to existing building in tunneling process to be reinforced using steel-pipe pile (1) isolation weakness zone with mini-valve tube (2) construction
Two ends cornerite is set, curtain wall together with the connection formation of steel-pipe pile (1) and mini-valve tube (2)；Mini-valve tube (2) is unidirectional；
Constructed between steel-pipe pile (1) using unidirectional mini-valve tube (2), the building foundation safety in protection tunneling process；Wherein steel
Pile tube deeply tunnels 2~3m below tunnel, unidirectional mini-valve tube (2) and gos deep into the following 1~2m in groups of building basis and sleeve grouting and reinforcing,
Specific implementation is as follows：
1) steel-pipe pile (1) is constructed
S1, fixed pile and rig are constructed in place；
S2, pipe-following drilling：Tripping in sleeve pipe is rotated in drilling, then drilling tool follows drilling, after under drilling tool to bottom hole, clockwise
When direction rotates, reamer is from center deviation and with drill bit synchronous rotary, and the aperture got out is placed on pipe sleeve external diameter, thus sleeve pipe with
The preceding of drill bit and then decline therewith, that is, realize pipe-following drilling；, it is necessary to lift drilling tool after drilling tool sets absolute altitude, it will now bore
Have counterclockwise rotates one week, reamer is drawn in the presence of bit central eccentric shaft to center, i.e., by sleeve pipe incite somebody to action
Drilling tool is proposed outside hole, and sleeve pipe is stayed in hole；Speed when just starting to spud in is slow, with normal after drilling reaches 1.5m~2m
Speed creeps into ensure pile precision；
S3, steel pipe manufacturing and placement；Sleeve pipe uses internal diameter Ф 150mm, wall thickness 4.5mm seamless steel pipes, often saves 2m, is connected with electric welding
Connect；Installed by the way of pipe-following drilling；
2) mini-valve tube (2) is constructed；
Mini-valve tube (2) includes the only slurry of PVC Grouting Pipes (3), centring ring (4), Grouting Pipe perforate (5), the first connector (6), first
Enclose (7), steel pipe perforate (8), the second slurry check ring (9), single ported thermostatic expansion valve (10), the second connector (11), steel pipe (12), sharp bottom
(13)；
Steel pipe (12) is arranged on PVC Grouting Pipes (3) inside, and steel pipe (12) passes through the first company respectively up and down with PVC Grouting Pipes (3)
Fitting (6), the first slurry check ring (7) and the second connector (11), the second slurry check ring (9) connection, the first slurry check ring (7) connect with first
Fitting (6) is connected, and the second connector (11) is connected with the second slurry check ring (9).Grouting Pipe perforate (5) is arranged on PVC Grouting Pipes (3)
Circumferential position, Grouting Pipe perforate (5) place is provided with single ported thermostatic expansion valve (10), centring ring is provided with the outside of single ported thermostatic expansion valve (10)
(4)；Steel pipe perforate (8) is arranged on steel pipe (12)；Sharp bottom (13) is arranged on the bottom of PVC Grouting Pipes (3)；
S1, boring positioning：According to the control point laid, the coordinate position for drawing hole is calculated, hole position is released using total powerstation, is used
Spirit level measures ground elevation, it is determined that drawing hole depth；
S2, drilling and forming hole：Using mud off, aperture 91mm；
S3, cast sleeve shell material：Sleeve shell material match ratio is：Cement：Soil：Water=50kg：75kg：94kg；Sleeve shell material method for implanting：
20mm Grouting Pipe tripping in bottom holes, with grouting pump from material feeding steel pipe hand-hole bottom；
S4, lower mini-valve tube：Lower mini-valve tube include lower sleeve shell material, lower mini-valve tube and connect, drill seal etc. work；Sleeve shell material press than
Example is prepared, lower mini-valve tube after mud in hole is replaced；Being completely embedded of mini-valve tube, ensure without disconnecting phenomenon, mini-valve tube tripping in
To bottom hole, lower tip band taper plug；
S5, sealing：Ground around aperture is blocked to below ground 1m in orientation using accelerated cement, to prevent note
The generation of grout phenomenon during slurry；
S6, lower core pipe；First check casting head situation, it is ensured that check valve it is in good condition；Pipeline respectively saves pipeline without clogging
Quality of connection it is reliable；If mini-valve tube is blocked, first carry out washing pipe, it is ensured that core pipe is transferred to bottom hole；
3) sleeve valve barrel grouting
S1, slurries make：The match ratio mixing slurries provided by design, the proportion of slurries meets the requirements, and additive is true by design
Fixed parameter is added, to ensure the preparation quality of cement grout；
S2, drive slip casting machine：All work all carry out after open slip casting machine carry out slip casting, during slip casting by listening, see pressure
Power, see grouting amount to judge the implementation result of slip casting；Whether listening has exception, sees whether pressure is too high, whether sees grouting amount
The injection rate of design is reached, when the injection rate that sound is without exception, pressure is not too high, grouting amount reaches design, starts slip casting and does
Good slip casting record；
S3, biliquid mixing：Two fluid grouting controls the setting time of slurries, in 60~120s, to be required and acted on not according to slip casting
Together, by adjusting the proportioning of slurries and the concentration proportion of cement liquid, to adjust the setting time of slurries；Dual slurry is in slip casting machine
Blender at mix, slurries ratio is 1：1；
S4, slip casting：Take by a point sequence hole segmented slip casting from bottom to top, every section of slip casting length turns into slip casting step pitch；Slip casting step pitch
0.6~1m is chosen, influence of layer inhomogeneity to slip casting effect is so effectively reduced；During slip casting, every section of slip casting is completed
Core pipe is above carried afterwards, slip casting core pipe above carry be pressure rise, reach grouting amount when carry out, core zinc pipe is carried above and is exerted oneself
Core pipe length even, quick in time and that a step pitch is moved up or down by the step pitch of setting；Often complete 3~4m slip castings long
Degree will dismiss a section slip casting core pipe；
Carried on S5, core pipe：Slip casting core pipe above carry be pressure rise, reach grouting amount when carry out, above carry core pipe exert oneself uniformly,
In time quickly and by the progress of uniform step pitch；
S6, eventually filling standard：Reach design grouting pressure, grouting and reinforcing section midge amount<2L/min voltage stabilizings 15min is filled eventually.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710314959.6A CN106978821A (en) | 2017-05-07 | 2017-05-07 | A kind of soft soil layer reduces shield driving and applies method to the retaining design that building foundation influences |
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| CN201710314959.6A CN106978821A (en) | 2017-05-07 | 2017-05-07 | A kind of soft soil layer reduces shield driving and applies method to the retaining design that building foundation influences |
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| CN108978694A (en) * | 2018-07-01 | 2018-12-11 | 北京工业大学 | A kind of precise guidance grouting method for construction water-stop curtain in tunnel |
| CN109630155A (en) * | 2019-01-24 | 2019-04-16 | 宁波用躬科技有限公司 | A kind of top-bottom cross method for tunnel construction of different section type |
| CN110374107A (en) * | 2019-08-06 | 2019-10-25 | 田弘扬 | The constructing device and its construction method of soft soil foundation pile holes protecting wall |
| CN110939449A (en) * | 2019-12-20 | 2020-03-31 | 中铁隧道局集团有限公司 | Method for treating bed rock raised stratum in shield construction |
| CN112176781A (en) * | 2019-07-05 | 2021-01-05 | 北京华铁时代建设发展有限公司 | Method for controlling subgrade settlement of high-speed rail operation |
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| CN114542797A (en) * | 2022-01-26 | 2022-05-27 | 中铁十四局集团隧道工程有限公司 | Lining sleeve pipe growth reinforcing device and method used in pipe curtain jacking meeting resistance |
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Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108978694A (en) * | 2018-07-01 | 2018-12-11 | 北京工业大学 | A kind of precise guidance grouting method for construction water-stop curtain in tunnel |
| CN108978694B (en) * | 2018-07-01 | 2020-07-03 | 北京工业大学 | Accurate guidance grouting method for building waterproof curtain in tunnel |
| CN109630155A (en) * | 2019-01-24 | 2019-04-16 | 宁波用躬科技有限公司 | A kind of top-bottom cross method for tunnel construction of different section type |
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| CN113373901A (en) * | 2021-05-27 | 2021-09-10 | 中建一局集团建设发展有限公司 | Overlapping shield tunnel house foundation reinforcing structure next to house and construction method |
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Application publication date: 20170725 |