CN109944593A - The reinforcement means of existing building is worn under a kind of shield tunnel - Google Patents
The reinforcement means of existing building is worn under a kind of shield tunnel Download PDFInfo
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- CN109944593A CN109944593A CN201910137909.4A CN201910137909A CN109944593A CN 109944593 A CN109944593 A CN 109944593A CN 201910137909 A CN201910137909 A CN 201910137909A CN 109944593 A CN109944593 A CN 109944593A
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- existing building
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- wearing
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Abstract
The present invention relates to method for tunnel construction technical fields, in particular to the reinforcement means for wearing existing building under a kind of shield tunnel.In the both lateral sides construction reinforcement stake of existing building, anchor cable is worn in the soil body between existing building and shield tunnel, anchor cable both ends are fixed on reinforcing pile after stretch-draw anchor to design strength, then to the lower section soil internal injection of existing building, the reinforced concrete structure that anchor cable forms carrying existing building is wrapped up in slip casting, and slip casting reaches reinforcing of the completion to existing building after design strength.Ruggedized construction of the invention is simple, evaded the pile foundation and internal structure of existing building completely, avoided and damage to existing building, and the complete preservation integrality and safety of existing building has great promotional value.
Description
Technical field
The present invention relates to method for tunnel construction technical field, in particular to worn under a kind of shield tunnel existing building plus
Solid method.
Background technique
As China's subway construction is increasing, wherein the existing object of building of shield driven tunnel crossing is difficult to avoid that.In shield tunnel
Under when wearing existing building, traditional method does sleeve valve barrel grouting around house, receives to the geology below existing building
Beam increases the bearing capacity of entire geology.But since existing building weight increases, geology is poor below existing building is caused
Existing building differential settlement is excessive, and existing building wall crazing to be traversed is caused to have existing building when becoming dilapidated house
Occur, especially a line city is northern, upper, wide, deep room rate is very expensive, in addition some existing buildings owner of estate mismatches and disagrees
Tear room open, typically without the shield driven tunnel crossing temple of removal option, historical relic's protection the existing buildings such as ancient buildings safely plus
Gu it is even more important, no matter social value and economic value it is especially huge.
In response to this problem, the entitled of Patent No. " CN107119732A " " wears the group of building under a kind of shield tunnel
The Chinese invention patent of beam active support and change method " provides and wears the method that building is reinforced under a kind of pair of shield tunnel, should
After the method earth excavation of ground end progress indoors, reinforcing water-proofing treatment first, construct to pile foundation, then master is made in pile foundation
Beam；Then it is fitted into secondary beam on the quasi- ground column underpined in building bottom, secondary beam both ends pass through hydraulic jack frame one respectively
On girder, supported by pile foundation, girder and secondary beam by the building in subway tunnel influence area；Last real-time monitoring column sinks
Situation is dropped, if column settles, girder and building settlement are adjusted by hydraulic jack；If column does not settle or no longer
Sedimentation cuts house original column below secondary beam, Tunnel Passing house lower section by shield machine.This method can be good at controlling
The sedimentation of whole building, but due to needing to be excavated in Indoor environment bottom, it is larger to the destruction of whole building,
It is unfavorable for promoting the use of, especially for heritage buildings, the method for this interior excavation is just difficult to carry out at all.
Summary of the invention
Present invention aim to solve to wear building under the shield tunnel for the prior art that above-mentioned background technique is mentioned
Reinforcement means there are problems that destroying existing building it is big, be difficult to promote, provide and wear existing building under a kind of shield tunnel
Reinforcement means.
The technical solution of the present invention is as follows: wearing the reinforcement means of existing building under a kind of shield tunnel, it is characterised in that: in
The both lateral sides construction reinforcement stake of existing building wears anchor cable in the soil body between existing building and shield tunnel,
Anchor cable both ends are fixed on reinforcing pile after drawing anchor cable to design strength, then to the lower section soil internal injection of existing building,
The reinforced concrete structure that anchor cable forms carrying existing building is wrapped up in slip casting, and slip casting is completed to build to existing after reaching design strength
Build the reinforcing of object.
Further in the method for the both lateral sides construction reinforcement stake of existing building are as follows: lateral the two of existing building
Steel cofferdam construct as operation platform, in construction in steel cofferdam along the spaced apart more reinforcings of shield tunnel direction of travel in side
Stake.
The method of anchor cable is further worn in the soil body between existing building and shield tunnel are as follows: in existing building
It drills on the soil body between object and shield tunnel, the pipe tunnel arranged along shield tunnel direction of travel is worn into drilling and is hung down
Anchor cable is passed through horizontal pipeline by the horizontal pipeline of straight shield tunnel direction of travel.
If without support pile foundation below existing building, bracing structure only arranges horizontal pipeline.
The method further to drill on the soil body between existing building and shield tunnel are as follows: advance along shield tunnel
Pile foundation below existing building is avoided in direction and the drilling of vertical shield tunnel direction of travel, drilling.
The method of the horizontal pipeline of vertical shield tunnel direction of travel is further worn into drilling are as follows: to along vertical shield
Horizontal pipeline is worn in the drilling of structure tunnel direction of travel, the tube body of horizontal pipeline both ends imporosity part is made to be in reinforcing pile stake
Push up position.
The method of further stretch-draw anchor are as follows: linking beam is poured reinforcing stake top, it will be ipsilateral in existing building
Row's reinforcing pile be connected as one, and horizontal pipeline is in the tube body reinforced at stake top and is poured in linking beam, to even
After binder reaches design strength, linking beam is relied on to carry out tensioning to anchor cable.
The method for further pouring linking beam in reinforcing stake top are as follows: reserved in reinforcing stake top in construction reinforcement stake
Reinforcing bar is connected, the framework of steel reinforcement of linking beam is bound on reserved connection reinforcing bar, then casting concrete forms linking beam.
Further to the method for the lower section soil internal injection of existing building are as follows: infused into pipe tunnel and horizontal pipeline
Slurry, grouting serous fluid enter necromancer under existing building by the slip casting through-hole on slip casting tube body in pipe tunnel and horizontal pipeline
In vivo, the soil body below existing building is reinforced.
Further in the both lateral sides inserting piling mini-valve tube of existing building, by mini-valve tube to existing building laterally two
The native internal injection of side forms water-stop curtain, after reaching design strength, constructs in water-stop curtain far from the side of existing building
Reinforcing pile.
Both lateral sides construction reinforcement stake of the present invention in existing building, soil between existing building and shield tunnel
Horizontal, pipe tunnel is worn in vivo, and pipeline is Grouting Pipe, and horizontal pipeline wears anchor cable, and horizontal pipeline both ends are fixed on reinforcing pile top
Linking beam on, after the concrete strength of linking beam reaches tensioning intensity to anchor cable carry out tensioning, then by pipeline into
Row slip casting, slurry enter the pipeline soil body, and the reinforced concrete structure that anchor cable forms carrying existing building, note are wrapped up in slip casting
Slurry reaches reinforcing of the completion to existing building after design strength.The support force that anchorage cable stretching power is formed is transformed by reinforcing pile
The support force that pile foundation reverse friction power is formed is reinforced, has the function that support existing building.Meanwhile after pretensioning into pipeline
Slip casting, injecting cement paste inject the soil body by injected hole and form reinforcing layer, play sand settlement action above barrier reinforcing body.
Advantages of the present invention has: 1, the present invention passes through the both lateral sides and arranged beneath portal-framed structure pair in existing building
Existing building is supported fixation, avoids the problem that excavating existing building that building can be generated and destroys damage；
2, the present invention is by being arranged tension structure in the vertical supporting structure of two sides, to the transverse direction below existing building
Support construction carries out tensioning, is effectively transmitted to the sinking active force of existing building and reinforces pile foundation reverse friction power, avoids
The sinking of existing building and the soil body change the risk generated to shield tunnel construction；
3, the present invention carries out grouting and reinforcing to the soil body below existing building by grouting pipe, first is that forming one layer of reinforcing
Layer, the sand sedimentation of barrier reinforcing body top, dehydration causes sand to settle when avoiding because of shield crossing building.Second is that can enhance
The rigidity of the lower section soil body avoids subsidence problems, is supported third is that being capable of forming stable support construction to existing building；
4, the present invention by setting steel cofferdam as platform progress reinforcing pile and linking beam operation platform, avoid due to
Construction risk problem caused by existing building two sides subgrade settlement and infiltration, guarantees construction personnel's safety problem, improves and apply
The efficiency and safety for the industry that works；
5, the present invention carries out grouting and reinforcing into the soil body between vertical supporting structure and existing building by mini-valve tube,
Sealing (soil) curtain structure is formed, solves in work progress that the ground settlement as caused by water-rich sand layer is biggish to ask
Topic；
6, reinforcement means of the invention is applied widely, is suitble to the reinforcing of a variety of structures, no matter structures it is more it is high,
Layer is mostly complicated, and also no matter whether building has pile foundation, can carry out consolidation process by this programme.
Ruggedized construction of the invention is simple, and pile foundation construction can not be carried out by evading interior completely, completely solves house pile foundation
Lower section water-rich sand layer has been evaded the pile foundation and internal structure of existing building completely, has been avoided because of shield-tunneling construction dehydration settlement issues
Existing building is damaged, the complete preservation integrality and safety of existing building has a great promotion price
Value.
Detailed description of the invention
Fig. 1: ruggedized construction main view of the invention；
Fig. 2: ruggedized construction schematic top plan view of the invention；
Wherein: 1-pipe tunnel；2-horizontal pipelines；3-reinforcing piles；4-linking beams；5-steel cofferdams；6-existing build
Build object；7-pile foundations.
Specific embodiment
The following further describes the present invention in detail with reference to the accompanying drawings and specific embodiments.
Such as Fig. 1~2, consolidation process is carried out for existing building 6 is worn under shield tunnel, if 6 lower section of existing building
Soil layer is water-rich sand layer, in order to avoid occurring the excessive caused subsurface layer problem of precipitation in the construction process, needs to exist in advance
The both lateral sides of existing building 6 are constructed water-stop curtain, and the water-stop curtain of the present embodiment is by 1 meter of existing building 6
Then interior inserting piling mini-valve tube in spacing surrounding soil carries out consolidation process to the soil body by way of slip casting.
If the soil body of 6 lower section of existing building is not rich water soil layer, with regard to the construction without carrying out water-stop curtain.Reinforce knot
Structure is actually portal-framed structure, including being located at the vertical supporting structure of 6 both lateral sides of existing building and being located at existing building
The intracorporal bracing structure of soil between above 6 lower section of object and shield tunnel.As shown in Fig. 1~2, the present embodiment is perpendicular in construction
To before support construction, it is used as operation platform in the both lateral sides construction steel cofferdam 5 of existing building 6 in advance, then in steel cofferdam 5
Interior inserting piling reinforcing pile 3, more reinforcing piles 3 reserve 1m or so along shield tunnel direction of travel arranged for interval, in the upper end of reinforcing pile 3
Reinforcing bar, prepare for subsequent construction continuous beam 4.
As shown in Fig. 2, the bracing structure of the present embodiment includes the more longitudinal directions along shield tunnel direction of travel arrangement
The horizontal pipeline 2 of the shield tunnel direction of travel vertical with Duo Gen of pipeline 1, pipe tunnel 1 and horizontal pipeline 2 are to be evenly equipped on tube body
The grouting pipe of multiple slip casting through-holes, pipe tunnel 1 and horizontal pipeline 2 be criss-cross arranged by into pipe slip casting link one
Act the reinforced concrete structure for forming support existing building 6.Pipe tunnel 1 and horizontal pipeline 2 are to be arranged in existing building 6
Grouting pipe in 7 gap of lower section pile foundation.
Utilize automatic guide drilling device subdrilling anchor cable hole, then the porose pipe tunnel 1 of threading and horizontal pipeline 2, Xiang Heng
Anchor cable is worn into pipeline 2, anchor cable and the tension ground tackle in steel cofferdam 5 are attached.To all pipe tunnels 1 and laterally
After the completion of pipeline 2 is constructed, tensioning is carried out to anchor cable first with tension ground tackle and is fixed, slip casting is then carried out into horizontal pipeline 2, is infused
Slurry slurries are penetrated by slip casting through-hole in the soil body of 6 lower section of existing building, reinforce to the soil body, slurry stream is allowed to bury
Body, which is formed, stops " soil " curtain ", barrier causes the anchor cable top soil body to settle because of the sedimentation of anchor cable lower part.
Close to 6 inside of existing building, there are 3 meters of wide neutral gears to perform linking beam 4, and the width size of linking beam 4 depends on anchor cable
Stretching force size, it is therefore an objective to anchorage cable stretching reduction is resisted to the moment of flexure of reinforcing pile 3, linking beam 4 is reinforced concrete structure, in
Portion's reinforcing bar is mutually bound with the reserved 1 meter of high reinforcing bar of pile foundation is reinforced.As shown in Figure 1, linking beam 4 pour it is ipsilateral in existing building 6
3 upper end of row's reinforcing pile.
Some pours and is fixed in linking beam 4 for the anchor cable of the present embodiment and 2 both ends of lateral steel pipe, in order to avoid stifled
Hole, it is the imporous closed conduct structure in surface that lateral steel pipe 2, which extends to the tube body in continuous beam 4,.
When practice of construction: 1, being used as operation platform in the both lateral sides construction steel cofferdam 5 of existing building 6；
2, with the construction of progress reinforcing pile 3 in steel cofferdam 5,3 stake top reinforcing bar of reinforcing pile is reserved；
3, it drills, horizontal pipeline 2 is worn into drilling and indulges to the soil body between existing building 6 and shield tunnel
To pipeline 1, anchor cable is worn into horizontal pipeline 2；
4,4 reinforcing bar of linking beam is bound at 3 stake top of reinforcing pile, by 4 reinforcing bar of linking beam and stake top reinforcing bar binding and fixing one
It rises, pours linking beam 4, the imporosity at 2 both ends of horizontal pipeline partially passes through linking beam 4；
5, after linking beam semi-finals degree reaches requirement, start stretch-draw anchor, after reaching design requirement, to horizontal pipeline 2 and indulge
The slip casting into pipeline 1 after slip casting reaches design strength, completes the construction of ruggedized construction.
As shown in Fig. 2, the longitudinal direction of the present embodiment refers to that the direction of travel of shield tunnel, i.e. left and right directions in Fig. 2 laterally refer to
The direction of the traveling of vertical shield tunnel, i.e. up and down direction in Fig. 2.
Existing building is passed through in the shield tunnel front of the present embodiment description, if existing building is in shield tunnel two
And shield tunnel the position of side is not easy to arrangement ruggedized construction, can also actually arrange ruggedized construction on shield tunnel, i.e.,
Cross-coincidence position not inserting piling reinforcing pile, evades the access position of shield tunnel, in order to guarantee the stability of entire ruggedized construction,
The inserting piling range of other reinforcing piles can be appropriately extended, extend the length of linking beam.
The basic principles, main features and advantages of the present invention have been shown and described above.The technology of the industry
Personnel are it should be appreciated that the present invention is not limited to the above embodiments, and the above embodiments and description only describe this
The principle of invention, various changes and improvements may be made to the invention without departing from the spirit and scope of the present invention, these changes
Change and improvement all fall within the protetion scope of the claimed invention.The claimed scope of the invention by appended claims and its
Equivalent defines.
Claims (9)
1. wearing the reinforcement means of existing building under a kind of shield tunnel, it is characterised in that: in lateral the two of existing building (6)
Side construction reinforcement stake (3), wears anchor cable in the soil body between existing building (6) and shield tunnel, and stretch-draw anchor is to designing
Anchor cable both ends are fixed on reinforcing pile (3) after intensity, then to the lower section soil internal injection of existing building (6), slip casting packet
The reinforced concrete structure that anchor cable forms carrying existing building (6) is wrapped up in, slip casting is completed after reaching design strength to existing building
The reinforcing of object (6).
2. wearing the reinforcement means of existing building under a kind of shield tunnel as described in claim 1, it is characterised in that: Yu Jiyou
The method of the both lateral sides construction reinforcement stake (3) of building (6) are as follows: in the both lateral sides construction steel cofferdam of existing building (6)
(5) it is used as operation platform, in construction in steel cofferdam (5) along the spaced apart more reinforcing piles (3) of shield tunnel direction of travel.
3. wearing the reinforcement means of existing building under a kind of shield tunnel as described in claim 1, it is characterised in that: existing
The method of anchor cable is worn in the soil body between building (6) and shield tunnel are as follows: between existing building (6) and shield tunnel
The soil body on drill, worn into drilling along shield tunnel direction of travel arrangement pipe tunnel (1) and vertical shield tunnel row
Into the horizontal pipeline (2) in direction, anchor cable is passed through into horizontal pipeline (2).
4. wearing the reinforcement means of existing building under a kind of shield tunnel as claimed in claim 3, it is characterised in that: existing
The method to drill on the soil body between building (6) and shield tunnel are as follows: along shield tunnel direction of travel and vertical shield tunnel
Pile foundation (7) below existing building (6) is avoided in direction of travel drilling, drilling.
5. wearing the reinforcement means of existing building under a kind of shield tunnel as claimed in claim 4, it is characterised in that: to drilling
Inside wear the method for the horizontal pipeline (2) of vertical shield tunnel direction of travel are as follows: to the brill along vertical shield tunnel direction of travel
Horizontal pipeline (2) are worn in hole, and the tube body of horizontal pipeline (2) both ends imporosity part is made to be in reinforcing pile (3) stake top position.
6. wearing the reinforcement means of existing building under a kind of shield tunnel as claimed in claim 5, it is characterised in that: tensioning anchor
The method of rope are as follows: stake top pours linking beam (4) in reinforcing pile (3), will be in existing building (6) ipsilateral row's reinforcing pile
(3) it is connected as one, and the tube body that horizontal pipeline (2) is at reinforcing pile (3) stake top is poured in linking beam (4), to even
After binder (4) reaches design strength, linking beam (4) is relied on to carry out tensioning to anchor cable.
7. wearing the reinforcement means of existing building under a kind of shield tunnel as claimed in claim 6, it is characterised in that: reinforcing
The method that stake (3) stake top pours linking beam (4) are as follows: connection reinforcing bar is reserved in reinforcing pile (3) stake top at construction reinforcement stake (3),
The framework of steel reinforcement of linking beam (4) is bound on reserved connection reinforcing bar, then casting concrete forms linking beam (4).
8. wearing the reinforcement means of existing building under a kind of shield tunnel as claimed in claim 3, it is characterised in that: Xiang Jiyou
The method of the lower section soil internal injection of building (6) are as follows: to pipe tunnel (1) and horizontal pipeline (2) interior slip casting, grouting serous fluid is logical
The slip casting through-hole crossed on pipe tunnel (1) and the interior slip casting tube body of horizontal pipeline (2) enters the soil body below existing building (6)
It is interior, the soil body below existing building (6) is reinforced.
9. wearing the reinforcement means of existing building under a kind of shield tunnel as described in claim 1, it is characterised in that: Yu Jiyou
The both lateral sides inserting piling mini-valve tube of building (6), by mini-valve tube to the native internal injection shape of existing building (6) both lateral sides
At water-stop curtain, after reaching design strength, in side construction reinforcement stake (3) of the water-stop curtain far from existing building (6).
Priority Applications (1)
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| CN201910137909.4A CN109944593B (en) | 2019-02-25 | 2019-02-25 | Reinforcing method for shield tunnel to penetrate existing building |
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| CN201910137909.4A CN109944593B (en) | 2019-02-25 | 2019-02-25 | Reinforcing method for shield tunnel to penetrate existing building |
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Cited By (4)
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| CN110528594A (en) * | 2019-07-31 | 2019-12-03 | 浙江杭海城际铁路有限公司 | A kind of tunneling shield causes the guard method of neighbour's high-speed rail deformation of pile foundation |
| CN111502672A (en) * | 2020-04-22 | 2020-08-07 | 中建八局轨道交通建设有限公司 | Construction method for stratum reinforcement before opening of shield cutter head |
| CN114086968A (en) * | 2021-11-27 | 2022-02-25 | 中铁广州工程局集团有限公司 | Construction method for underground excavation tunnel penetrating existing building |
| CN114439060A (en) * | 2021-12-24 | 2022-05-06 | 中铁广州工程局集团有限公司 | Brick-concrete structure high-rise civil house foundation reinforcing method |
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| CN110528594A (en) * | 2019-07-31 | 2019-12-03 | 浙江杭海城际铁路有限公司 | A kind of tunneling shield causes the guard method of neighbour's high-speed rail deformation of pile foundation |
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| CN114086968A (en) * | 2021-11-27 | 2022-02-25 | 中铁广州工程局集团有限公司 | Construction method for underground excavation tunnel penetrating existing building |
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| CN114439060A (en) * | 2021-12-24 | 2022-05-06 | 中铁广州工程局集团有限公司 | Brick-concrete structure high-rise civil house foundation reinforcing method |
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| CN109944593B (en) | 2020-11-03 |
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