CN109854257A - Section piston air duct backfills shield station-crossing construction method - Google Patents
Section piston air duct backfills shield station-crossing construction method Download PDFInfo
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- CN109854257A CN109854257A CN201910175136.9A CN201910175136A CN109854257A CN 109854257 A CN109854257 A CN 109854257A CN 201910175136 A CN201910175136 A CN 201910175136A CN 109854257 A CN109854257 A CN 109854257A
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- air duct
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Abstract
The present invention provides a kind of section piston air ducts to backfill shield station-crossing construction method, the following steps are included: S1) before carrying out technique on shield machine's station-crossing operation, on the inner wall in piston air duct shield machine wait for by opposite two portal positions at apply horizontal grouting supporting, to be reinforced to the soil body near two portals；S2 concrete guide table) is applied in piston air duct bottom, concrete guide table is used in shield machine by supporting shield machine when piston air duct；S3 shield machine in piston air duct) is removed to wait for setting up air duct again by the original bracing members and steel purlin in range in two portal surroundings and supporting；S4) diaphram wall within the scope of two portals is abolished；S5 backfilling of earthwork construction) is carried out in piston air duct；S6) the piston air duct that operation shield machine is constructed by completing backfilling of earthwork；S7) after technique on shield machine's station-crossing, excavate the backfill earthwork in piston air duct, carry out shield duct piece dismounting, and continue the construction in piston air duct.
Description
Technical field
The present invention relates to technical field of tunnel construction, and in particular to a kind of section piston air duct backfill shield is missed the stop construction party
Method.
Background technique
With urban rail transit in China build fast development, shield method tunnel construction technology with its exclusive intelligence,
Safely, quickly, efficiently the features such as and advantage are more and more widely promoted and are applied.But it is closed in the construction of shield
In key link, more or less can all face duration pressure and caused by structure construction sequence change, in turn result in original design
Scheme can not match and meet the requirement of construction site.
Summary of the invention
The present invention provides a kind of section piston air duct backfill shield station-crossing construction method, and it is attached to can be avoided the existing section of appearance
Category structure is unformed but the construction of shield section still needs to the construction continued puzzlement, safe and efficient to solve thus bring construction
The problem of duration anxiety has the advantages that at low cost, practical, procedure connection is tight.
Section piston provided by the invention air duct backfills shield station-crossing construction method, comprising the following steps: S1) carrying out shield
Structure machine misses the stop before operation, on the inner wall in piston air duct shield machine wait for by opposite two portal positions at apply horizontal grouting
Supporting, to be reinforced to the soil body near described two portals；S2 concrete guide table) is applied in piston air duct bottom,
The concrete guide table is used in the shield machine by supporting the shield machine when piston air duct；S3 the work) is removed
The shield machine waits for setting up again by the original bracing members and steel purlin in range in described two portal surroundings in plug air duct
Air duct support；S4) diaphram wall within the scope of described two portals is abolished；S5 it) is carried out in the piston air duct
Backfilling of earthwork construction；S6 the piston air duct that the shield machine is constructed by completing backfilling of earthwork) is operated；S7) to the shield machine
After missing the stop, the backfill earthwork in the piston air duct is excavated, carry out shield duct piece dismounting, and continue applying for the piston air duct
Work.
Preferably, step S1) in apply horizontal grouting supporting include: along tunnel axis direction, in described two portals
Horizontal grouting supporting is applied in range and in described two portal surrounding preset ranges.
Preferably, uniformly distributed each using matrix type when applying horizontal grouting supporting within the scope of described two portals
Injected hole in portal.
Preferably, when applying horizontal grouting supporting in described two portal surrounding preset ranges, using circumferential uniform cloth
If the outer injected hole of each portal.
Preferably, step S2) described in concrete guide table include: to be symmetricly set on a left side for shield machine center line two sides
Concrete guide table and right concrete guide table.
Preferably, the side towards the shield machine center line of the left concrete guide table and the right concrete guide table
Inclined surface is all had, during the shield machine passes through piston air duct, the left concrete guide table and the right concrete
It the inclined surface of guide table can be with the tangent support of outer diameter of the shield machine.
Preferably, construction method further include: after the completion of concrete guide table construction, fall from power in the left concrete
And the right concrete fall from power between carry out rubble filling.
Preferably, step S6) the operation shield machine is by completing the piston air duct of backfilling of earthwork construction, comprising: from into
Portal of standing promotes the shield machine to start construction of entering the station, after the shield body of the shield machine enters piston air duct inside configuration
Stop promoting, secondary grouting supporting is carried out to the shield machine surrounding soil body；In the feelings that portal position of entering the station does not have obvious water burst, gushes sand
Under condition, continue to promote the shield machine, so that the shield machine is outbound from outbound portal, passes through institute in the shield body of the shield machine
After stating piston air duct inside configuration, secondary grouting supporting is carried out to the soil body of shield tail surrounding.
Preferably, step S7) excavate the backfill earthwork in the piston air duct, comprising: by layer-stepping digging operation and
The backfill earthwork in the piston air duct is excavated in bench excavation operation.
Section piston provided by the invention air duct backfills shield station-crossing construction method, suitable for section accessory structure engineering
Shield tunnel construction of missing the stop is applied by applying horizontal grouting supporting at the portal position of two sides in piston air duct bottom
Concrete guide table is removed the shield machine and is waited for by the original bracing members and steel purlin in range, within the scope of the portal
Diaphram wall is abolished, and backfilling of earthwork construction is carried out in the piston air duct, and it is attached to can be avoided the existing section of appearance
Structure is unformed but the construction of shield section still needs to the construction continued puzzlement, safe and efficient to solve thus bring construction work
The problem of phase anxiety, and post-processing operation continues to construct convenient for linking section accessory structure, has at low cost, practicability
By force, the tight advantage of procedure connection.
The other feature and advantage of the embodiment of the present invention will the following detailed description will be given in the detailed implementation section.
Detailed description of the invention
Attached drawing is to further understand for providing to the embodiment of the present invention, and constitute part of specification, under
The specific embodiment in face is used to explain the present invention embodiment together, but does not constitute the limitation to the embodiment of the present invention.Attached
In figure:
Fig. 1 is the step process of the section piston air duct backfill shield station-crossing construction method of embodiment according to the present invention
Figure；
Fig. 2 is portal position in the section piston air duct backfill shield station-crossing construction method of embodiment according to the present invention
Sectional view；And
Fig. 3 is concrete guide table in the section piston air duct backfill shield station-crossing construction method of embodiment according to the present invention
With the sectional view of shield machine.
Description of symbols
1 portal, 2 shield machine
The outer injected hole of 4 portal of injected hole in 3 portals
The 5 right concrete guide table of left concrete guide table 6
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.
With reference to the accompanying drawing, technical solution in the embodiment of the present invention is described in detail.
As shown in Figure 1-Figure 3, the present invention provides a kind of section piston air duct backfill shield station-crossing construction method, including following
Step: S1) before progress shield machine 2 misses the stop operation, opposite two portals to be passed through of shield machine 2 on the inner wall in piston air duct
Horizontal grouting supporting is applied at 1 position, to reinforce to the soil body near described two portals 1；S2) in the piston air duct
Bottom applies concrete guide table, and the concrete guide table is used for when the shield machine 2 passes through the piston air duct described in support
Shield machine 2；S3) shield machine 2 is wait pass through original bracing members and steel purlin in range in the dismounting piston air duct, in institute
It states two 1 surroundings of portal and sets up air duct support again；S4) diaphram wall in described two 1 ranges of portal is abolished；
S5 backfilling of earthwork construction) is carried out in the piston air duct；S6 the shield machine 2) is operated by completing backfilling of earthwork construction
Piston air duct；S7) after the shield machine 2 misses the stop, excavate the backfill earthwork in the piston air duct, carry out shield duct piece and tear open
It removes, and continues the construction in the piston air duct.
Section piston provided by the invention air duct backfills shield station-crossing construction method, suitable for section accessory structure engineering
Shield tunnel misses the stop construction, for example, completion has been excavated in piston air duct in section in construction, and bottom plate has been poured and finished, at this time
Shield machine 2 is needed through uncompleted section piston air duct, and it is attached that construction method provided by the invention can solve existing section
Structure is unformed but the construction of shield section still needs to the problem of continuing.
According to the technique and scheme of the present invention, as shown in Fig. 2, step S1 is first carried out) it misses the stop operation carrying out shield machine 2
Before, horizontal grouting supporting is applied at opposite two 1 positions of portal to be passed through of shield machine 2 on the inner wall in piston air duct, with right
The soil body near described two portals 1 is reinforced, preventing in described two 1 positions of portal generation water burst, gushing sand or even collapsing
It collapses accident.
A kind of embodiment according to the present invention, step S1) in apply horizontal grouting supporting include: along tunnel axis side
To, in described two 1 ranges of portal and in 1 surrounding preset range of described two portals apply horizontal grouting supporting.
Preferably, uniformly distributed each using matrix type when applying horizontal grouting supporting in described two 1 ranges of portal
Injected hole 3 in portal can play preferable reinforce and imitate so that being evenly arranged the interior injected hole 3 in 1 range of portal
Fruit.
Preferably, when applying horizontal grouting supporting in described two 1 surrounding preset ranges of portal, using circumferential uniform cloth
If the outer injected hole 4 of each portal, according to a kind of embodiment, using the center of circle of the portal 1 as the two circle outer note of center of circle arrangement
Hole 4 is starched, 1 surrounding of portal is formed and is supported, and blocks the water burst of 1 surrounding of portal and gushes sand channel, cement slurry/biliquid
Slurry, which can spread to interpenetrate with periphery hole slip casting region in layer of sand, to be merged, and is formed by curing tubular reinforcing body in portal surrounding,
It is arrived at a station the safety requirements that face is water-tight, does not gush sand, does not collapse of appearing with meeting shield machine.
A kind of embodiment according to the present invention, step S1) in apply horizontal grouting supporting include: design slip casting drilling
Drilling operation and side drilling marginal not slurry are implemented to each injected hole in position, until being drilled into predetermined depth, grouting pressure reaches design pressure
Force value completes horizontal grouting operation.
Specifically, according to a kind of embodiment, only infuse single liquid cement slurry first, if grouting pressure be not achieved design requirement and
Slurries dosage is big, then gradually uses dual slurry instead, is required with reaching grouting pressure control.Slip casting takes flow in low-pressure to inject,
Pressure gradually rises during slip casting, and flow gradually decreases, and when pressure rises to final grouting pressure, continues pressure injection 5 minutes, Ji Kejie
Beam slip casting.Grouting amount is controlled by control grouting pressure when slip casting, increases cement when grouting pressure is smaller, and grouting amount is larger
The concentration of slurry continues slip casting to designing hole site depth until final pressure reaches 1.0~2MPa.
According to a kind of embodiment, cement uses P.O42.5 ordinary portland cement, and the ratio of mud in cement grout is 1:
1, ripples glass concentration is 40 wave magnesium degree, and the volume ratio of cement slurry and waterglass is 3:1, to reach preferable consolidation effect.
According to the technique and scheme of the present invention, as shown in figure 3, after the completion of applying horizontal grouting supporting, step S2 is carried out) in institute
It states piston air duct bottom and applies concrete guide table, the concrete guide table is used to pass through the piston air duct in the shield machine 2
When support the shield machine 2 so that the shield machine 2 passes through the piston air duct.
A kind of embodiment according to the present invention, step S2) described in concrete guide table include: to be symmetricly set on the shield
The left concrete guide table 5 and right concrete guide table 6 of 2 center line two sides of structure machine, to form symmetrical support to the shield machine 2
Power passes through the piston air duct so that the shield machine 2 remains operational direction.
A kind of embodiment according to the present invention, it is preferable that the left concrete guide table 5 and the right concrete guide table 6
The side towards 2 center line of shield machine all have inclined surface, the shield machine 2 pass through piston air duct during,
It the inclined surface of the left concrete guide table 5 and the right concrete guide table 6 can be with the tangent branch of outer diameter of the shield machine 2
Support, so that the shield machine 2 while being supported, reduces contact area, reduces frictional force, it is ensured that the shield machine
2 travelings are gone on smoothly.
A kind of embodiment according to the present invention, it is preferable that the construction method further include: construct in the concrete guide table
After the completion, the left concrete fall from power 5 and the right concrete fall from power and carry out rubble filling between 6, fill the rubble, it is right
The concrete guide table 6 increases support force, reduce the left concrete fall from power 5 and the right concrete fall from power 6 carrying
Power also increases buffer layer with the pedestal for the shield machine 2, further ensures the safety of construction.
According to the technique and scheme of the present invention, after completing the concrete guide table construction, step S3 is executed) remove the piston
The shield machine 2 to set up in described two 1 surroundings of portal by the original bracing members and steel purlin in range again in air duct
Air duct support；Since original bracing members and steel purlin block the operation of the shield machine 2, it is therefore desirable to it is removed, in order to
Guarantee that the support force in the piston air duct does not weaken, set up air duct again in 1 surrounding of portal and support, to guarantee the peace of construction
Quan Xing.
Specifically, according to a kind of embodiment, air duct support is newly increased, every bracing members apply brace pre axial force 350KN, and
It is lockked with bquster, expansion bolt fixation is taken in bracing members end, and the bracing members bottom plate soil body is drawn when preventing shield machine from passing through
Sky is fallen, and influences shield machine driving.
According to the technique and scheme of the present invention, since the thickness of diaphram wall is larger, and there is reinforcing rib in diaphram wall
And girder rib, the survivable diaphragm wall of cutter of the shield machine 2, and damage and failure can be caused to cutter, influence the shield
The speed of service of machine 2, therefore execute step S4) diaphram wall in described two 1 ranges of portal is abolished, to guarantee
The shield machine 2 passes through, and the safety of construction.
According to the technique and scheme of the present invention, step S5 is executed) backfilling of earthwork construction is carried out in the piston air duct, so that
Reach earth pressure balance inside and outside the piston air duct, be conducive to the holding of shield machine support pressure, guarantees shield machine in air channel structure
It appears and into hole when does not occur Sand dangerous situation, smoothly complete shield machine and miss the stop in air duct.
According to the technique and scheme of the present invention, after carrying out backfilling of earthwork construction to the piston air duct, step S6 is executed) behaviour
Make the piston air duct that the shield machine 2 is constructed by completing backfilling of earthwork.
Specifically, according to a kind of embodiment, during entering the station, shield machine presses the thrust for being not more than 1000t, cutter head torque
Control adjusts foam parameters in 3800KNm or less and in time, guarantees that torque range, the control of top soil pressure are left in 1.2Bar
Right, simultaneous grouting slurry is maintained at every ring 4.5m3The normal boring parameter of left and right.
A kind of embodiment according to the present invention, it is preferable that step S6) shield machine 2 is operated by completing the earthwork time
Fill out the piston air duct of construction, comprising: construction of entering the station since the portal 1 that enters the station promotes the shield machine 2, in the shield machine 2
Shield body stops promoting after entering piston air duct inside configuration, carries out secondary grouting supporting to the 2 surrounding soil body of shield machine, blocks
The water burst of 1 surrounding of portal described in side gushes sand channel, and increases the bearing capacity for 1 surrounding of portal that enters the station, and guarantees the peace of construction
Quan Xing.
In the case where 1 position of portal of entering the station does not have obvious water burst, gushes sand, continue to promote the shield machine 2, so that described
Shield machine 2 is outbound from outbound portal 1, the shield machine 2 shield body by piston air duct inside configuration after, to shield tail four
The soil body in week carries out secondary grouting supporting, blocks the water burst of 1 surrounding of portal described in the other side, gushes sand channel, and increases another
The bearing capacity of 1 surrounding of portal described in side guarantees the safety of construction.
According to the technique and scheme of the present invention, step S7 is executed) after the shield machine 2 misses the stop, excavate the piston air duct
The interior backfill earthwork carries out shield duct piece dismounting, and continues the construction in the piston air duct, and linking area is convenient in post-processing operation
Between accessory structure continue to construct, it is at low cost, practical, procedure connection is close.
A kind of embodiment according to the present invention, it is preferable that step S7) excavate the backfill earthwork in the piston air duct,
It include: the backfill earthwork excavated in the piston air duct by layer-stepping digging operation and bench excavation operation.
In order to minimize the disturbance to building enclosure bracing members, successively it is excavated to downwards and temporarily adds bracing members position
It sets, excavates to remove afterwards in place and temporarily add bracing members, until backfill in piston air duct is all excavated, ensure in digging process
Earthwork equilibrium is excavated in air duct, is not greater than 2m in bracing members position and section of jurisdiction position earth excavation height difference, every layer of surrounding is reserved
Back-pressure soil, to increase foundation pit self-stability.
The object of the present invention is to provide a kind of section piston air ducts to backfill shield station-crossing construction method, and it is attached to be suitable for section
The shield tunnel of Structural Engineering misses the stop construction, by applying horizontal grouting supporting at 1 position of two sides portal, in the Piston Action Wind
Road bottom applies concrete guide table, removes the shield machine 2 wait pass through original bracing members and steel purlin in range, to the hole
Diaphram wall in 1 range of door is abolished, and backfilling of earthwork construction is carried out in the piston air duct, it is attached to solve existing section
Category structure is unformed but the construction of shield section still needs to the problem of continuing, and avoids the construction period nervous, and post-processing operation
Continue to construct convenient for linking section accessory structure, has the advantages that at low cost, practical, procedure connection is tight.
The optional embodiment of the embodiment of the present invention is described in detail in conjunction with attached drawing above, still, the embodiment of the present invention is simultaneously
The detail being not limited in above embodiment can be to of the invention real in the range of the technology design of the embodiment of the present invention
The technical solution for applying example carries out a variety of simple variants, these simple variants belong to the protection scope of the embodiment 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, it can be combined in any appropriate way.In order to avoid unnecessary repetition, the embodiment of the present invention pair
No further explanation will be given for various combinations of possible ways.
In addition, any combination can also be carried out between a variety of different embodiments of the embodiment of the present invention, as long as it is not
The thought of the embodiment of the present invention is violated, equally should be considered as disclosure of that of the embodiment of the present invention.
Claims (9)
1. a kind of section piston air duct backfills shield station-crossing construction method, for carrying out shield machine in the work progress of piston air duct
Miss the stop operation, which is characterized in that the construction method the following steps are included:
S1 it) misses the stop before operation carrying out shield machine (2), to be passed through two opposite of shield machine (2) on the inner wall in piston air duct
Horizontal grouting supporting is applied at portal (1) position, to reinforce to the soil body of described two portals (1) nearby；
S2 concrete guide table) is applied in piston air duct bottom, the concrete guide table in the shield machine (2) for passing through
The shield machine (2) are supported when the piston air duct；
S3) shield machine (2) is wait pass through original bracing members and steel purlin in range in the dismounting piston air duct, described
Two portal (1) surroundings set up air duct support again；
S4) diaphram wall in described two portals (1) range is abolished；
S5 backfilling of earthwork construction) is carried out in the piston air duct；
S6 the piston air duct that the shield machine (2) is constructed by completing backfilling of earthwork) is operated；
S7) after the shield machine (2) misses the stop, excavate the backfill earthwork in the piston air duct, carry out shield duct piece dismounting, and
Continue the construction in the piston air duct.
2. construction method according to claim 1, which is characterized in that step S1) in apply horizontal grouting supporting include: edge
Tunnel axis direction, in described two portals (1) range and in described two portal (1) surrounding preset ranges apply water
Flat grouting support.
3. construction method according to claim 2, which is characterized in that apply level in described two portals (1) range
When grouting support, using injected hole (3) in the uniformly distributed each portal of matrix type.
4. construction method according to claim 2, which is characterized in that in described two portals (1) surrounding preset range
When applying horizontal grouting supporting, using injected hole (4) outside circumferential uniformly distributed each portal.
5. construction method according to claim 1, which is characterized in that step S2) described in concrete guide table include: symmetrical
It is arranged in the left concrete guide table (5) of the shield machine (2) center line two sides and right concrete guide table (6).
6. construction method according to claim 5, which is characterized in that the left concrete guide table (5) and the right coagulation
The side towards the shield machine (2) center line of native guide table (6) all has inclined surface, passes through piston in the shield machine (2)
During air duct, the inclined surface of the left concrete guide table (5) and the right concrete guide table (6) can be with the shield
The tangent support of outer diameter of machine (2).
7. construction method according to claim 5, which is characterized in that the construction method further include: led in the concrete
After the completion of platform construction, falls from power (5) in the left concrete and the right concrete is fallen from power progress rubble filling between (6).
8. construction method according to claim 1, which is characterized in that step S6) the operation shield machine (2) passes through completion
The piston air duct of backfilling of earthwork construction, comprising:
It enters the station since the portal that enters the station (1) promotes the shield machine (2) construction, described in the shield body entrance of the shield machine (2)
Stop promoting after the inside configuration of piston air duct, secondary grouting supporting is carried out to shield machine (2) the surrounding soil body；
In the case where the portal that enters the station (1) position does not have obvious Sand, continue to promote the shield machine (2), so that described
Shield machine (2) is outbound from outbound portal (1), the shield machine (2) shield body by piston air duct inside configuration after, it is right
The soil body of shield tail surrounding carries out secondary grouting supporting.
9. construction method according to claim 1, which is characterized in that step S7) excavate backfill in the piston air duct
Cubic metre of earth, comprising:
The backfill earthwork in the piston air duct is excavated by layer-stepping digging operation and bench excavation operation.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910175136.9A CN109854257A (en) | 2019-03-08 | 2019-03-08 | Section piston air duct backfills shield station-crossing construction method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910175136.9A CN109854257A (en) | 2019-03-08 | 2019-03-08 | Section piston air duct backfills shield station-crossing construction method |
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| Publication Number | Publication Date |
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| CN109854257A true CN109854257A (en) | 2019-06-07 |
Family
ID=66900177
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| Application Number | Title | Priority Date | Filing Date |
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| CN201910175136.9A Pending CN109854257A (en) | 2019-03-08 | 2019-03-08 | Section piston air duct backfills shield station-crossing construction method |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110778341A (en) * | 2019-11-01 | 2020-02-11 | 中建八局轨道交通建设有限公司 | Backfill construction method for construction vertical shaft and construction transverse passage |
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| CN102146679A (en) * | 2010-02-09 | 2011-08-10 | 中铁十一局集团有限公司 | Construction method for complex geological section earth pressure balance shield passing middle air shaft |
| CN104912561A (en) * | 2015-05-28 | 2015-09-16 | 中建一局集团第五建筑有限公司 | Construction method for continuously passing through vertical shaft by shield under high confined water complex stratum condition |
| CN104948196A (en) * | 2015-05-19 | 2015-09-30 | 中国建筑第五工程局有限公司 | First tunnel then station continuous construction shield station entering method |
| CN107654234A (en) * | 2017-07-24 | 2018-02-02 | 广州地铁设计研究院有限公司 | A kind of construction method of subway tunnel crossing subway station diaphram wall |
| CN109162741A (en) * | 2018-10-29 | 2019-01-08 | 中铁十二局集团有限公司 | The method in shield crossing piston air duct and piston air duct superstructure synchronous construction |
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- 2019-03-08 CN CN201910175136.9A patent/CN109854257A/en active Pending
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102146679A (en) * | 2010-02-09 | 2011-08-10 | 中铁十一局集团有限公司 | Construction method for complex geological section earth pressure balance shield passing middle air shaft |
| CN104948196A (en) * | 2015-05-19 | 2015-09-30 | 中国建筑第五工程局有限公司 | First tunnel then station continuous construction shield station entering method |
| CN104912561A (en) * | 2015-05-28 | 2015-09-16 | 中建一局集团第五建筑有限公司 | Construction method for continuously passing through vertical shaft by shield under high confined water complex stratum condition |
| CN107654234A (en) * | 2017-07-24 | 2018-02-02 | 广州地铁设计研究院有限公司 | A kind of construction method of subway tunnel crossing subway station diaphram wall |
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| CN110778341A (en) * | 2019-11-01 | 2020-02-11 | 中建八局轨道交通建设有限公司 | Backfill construction method for construction vertical shaft and construction transverse passage |
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Application publication date: 20190607 |