CN207261017U - Tunnel form prestressed pipe curtain system - Google Patents
Tunnel form prestressed pipe curtain system Download PDFInfo
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- CN207261017U CN207261017U CN201721245347.8U CN201721245347U CN207261017U CN 207261017 U CN207261017 U CN 207261017U CN 201721245347 U CN201721245347 U CN 201721245347U CN 207261017 U CN207261017 U CN 207261017U
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- curtain system
- pipe curtain
- prestressed
- precast concrete
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Abstract
A kind of tunnel form prestressed pipe curtain system, the pipe curtain system is made of some precast concrete beams, pre-manufactured steel unit, a concrete cast-in-situ section, some transversely prestressed bars and longitudinal prestressing muscle, some precast concrete beams are connected by lock and crack grouting, and form entirety by tensioning transversely prestressed bars and longitudinal prestressing muscle；Construction platform of the pre-manufactured steel unit as transversely prestressed bars, applies circumferential or transverse prestress for some precast concrete beams；The concrete cast-in-situ section is located at the bottom of the pipe curtain system.Precast concrete beam, the corner steel unit used in the pipe curtain system can be standardized production in factory, it can not only ensure that structure has good stress performance, and have the advantages that simple structure, speed of application are fast, overall stiffness is big, saving construction cost and duration, have broad application prospects in Underground Construction, especially Municipal Engineering Construction.
Description
Technical field
The utility model belongs to technical field of civil engineering, more particularly relates to a kind of tunnel form prestressed pipe curtain system
And construction technology.
Background technology
Pipe curtain construction technology is a kind of trenchless technology for constructing underground structure, is chiefly used in passing through road, railway, structure
The hypogee on thing, airport etc..Pipe curtain construction technology, by excavating Starting Well and active well at the both ends of underground structure, uses
The mode of jacking prefabricated components, forms annular curtain structure in underground, has the function that to bear load around and sealing, and then dig
Dig and construct underground structure.As one kind of no-dig technique technique, pipe curtain construction technology relative to construction technologies such as push pipe, shields and
Speech, influence all smallers of requirement and surrounding enviroment to construction space, have successful case in countries in the world.
By the engineering practice in more than 40 years, a variety of different pipe curtain construction technologies, including ESA (Endless are developed
Self-advancing) engineering method, FJ (Front Jacking Method) engineering method, RBJ (Roof-Box Jacking Method)
Engineering method, R＆C (Roof＆Culvert) engineering method, new pipe-roof method (New Tubular Roof Method, abbreviation NTR engineering method) etc..Its
In be only used as temporary structure for ESA engineering methods, FJ engineering methods, RBJ engineering methods and R＆C engineering methods, the pipe curtain of jacking, be the later stage box culvert
Jacking provides certain supporting and waterproof action, its difference is that the mode of jacking box culvert is different.New pipe-roof method, as tradition
The improvement of pipe-roof method, is retained using large diameter steel pipe (diameter is generally in more than 1800mm) jacking, and as permanent structure
Get off, the construction later stage constructs in the watertight volume that its push pipe is formed does works outer contour.But above-mentioned various pipe curtains
Construction technology, for tedious process, it is necessary to carry out pipe curtain and box culvert two parts jacking, extension construction period, increases cost；Additionally, due to
The presence of upper tube curtain, box culvert absolute altitude must be reduced correspondingly, add active well foundation depth, increase difficulty of construction and wind
Danger.
Chinese patent CN105464675A discloses a kind of new face contacting pipe curtain system and its construction method, pipe curtain system
As tunnel advanced support structure, it is spliced by the rectangular steel pipe including at least two contact planes or similar rectangular steel pipe,
Contacted between steel pipe and adjacent steel pipe for face；Steel pipe includes at least two contact planes, respectively with the contact plane of adjacent steel pipe
Seamless fitting；The size of two contact planes contacted with each other is adapted to each other；Connect in the outside wall surface of the steel pipe, along one
Two long edges for touching plane are respectively welded a slideway, and adjacent two steel pipes are fixedly connected by slideway.Wherein, its pipe curtain
System cannot function as permanent structure, only by welding slideway joint steel pipe, compared with the structure that prestressed stretch-draw is formed, intensity
It far can not ensure.
Chinese patent CN102518443A discloses a kind of new method of ultra-shallow earth-covered heterotypic channel special type combination construction, uses
, just can not operation again because the driving of underground causes overburden layer to cave in when the top soil layer for solving construction of underground tunnel face is relatively thin
The problem of construction, tunneled by the square development machine of the top little module of the construction surface of the subterranean tunnel in ultra-shallow earth-covered layer,
It is pushed into rectangular steel tube section by section, forms a transversely arranged pipe curtain, then using places armored concrete behind the excavator of heavy in section
Box culvert displacement pipe curtain is constructed.It still needs box culvert, can not solve the above problem accordingly brought.
Chinese patent CN205172598U discloses a kind of pipe curtain rotary churning pile supporting construction, if including main pipe curtain steel pipe, often
At least one horizontal jet grouting stake is both provided between two pipe curtain steel pipes, and pipe curtain steel pipe and the edge of horizontal jet grouting stake closely connect
Touch, pipe curtain steel pipe combines the common supporting stress system to form big rigidity together with horizontal jet grouting stake.Horizontal jet grouting stake is set, is applied
Work difficulty is big, and can bring the problem of many new, as permanent structure, it is difficult to proof strength and required precision.
Utility model content
The purpose of this utility model is that propose a kind of New pipe curtain construction technology, i.e. tunnel form prestressed pipe curtain system
System, to solve the above problems and risk.Tunnel form prestressing force pipe-roof method is a kind of steel unit using four angles as prestressing force
The job location of muscle, by prestressing force, some individually components of pipe curtain surrounding is tightly bound round together, so that the change of control pipe curtain
Shape, improves the globality of pipe curtain, and then the construction method of the security of higher and economy.The system is using post-tensioning without viscous
Full prestressing system is tied, being reliably connected between each component is formed by crack grouting and prestressing force.Pass through lock between each component
Waterproof requirement is realized in button and grouting.Corner steel unit uses cast-in-place concrete, ensures connection stiffness.The cast-in-place closure finally constructed
Section, solves the problems, such as not joining the two sections of a bridge, etc caused by construction error.
According to above-mentioned purpose, technical solution is used by the utility model：
A kind of tunnel form prestressed pipe curtain system, the pipe curtain system is by some precast concrete beams 1, pre-manufactured steel unit
2nd, a concrete cast-in-situ section 3, some transversely prestressed bars 4 and longitudinal prestressing muscle 5 form, some precast concretes
Beam 1 is connected by lock and crack grouting, and forms entirety by tensioning transversely prestressed bars 4 and longitudinal prestressing muscle 5；
Construction platform of the pre-manufactured steel unit 2 as transversely prestressed bars 4, applies circumferential or horizontal for some precast concrete beams 1
Prestressing force；The concrete cast-in-situ section 3 is located at the bottom of the pipe curtain system, is the cast-in-place closure section of the pipe curtain system.
Further, the pipe curtain system is circular prestressed pipe curtain system, all components on cross section, circumferential
Prestressing force is firmly tied together.
Further, the pipe curtain system is box prestressed pipe curtain system, then passes through longitudinal direction and horizontal presstressed reinforcing steel
Each component is linked together, muscle causes each contact point between every two components to be in pressured state, is formed complete pre-
Stress members structure.
Further, the pre-manufactured steel unit 2, by placing steel reinforcement cage, cast-in-place concrete forms rigid joint.
Further, the pre-manufactured steel unit 2 is located at the top point of circular prestressed pipe curtain system.
Further, there are four pre-manufactured steel units 2, four pre-manufactured steel units 2 are positioned over box prestressing force
Four corner points of pipe curtain system.
Further, transversely prestressed bars are both provided with the precast concrete beam 1 and the pre-manufactured steel unit 2 to reserve
Hole 6, the precast concrete beam 1 are provided with longitudinal prestressing muscle preformed hole 7；The transversely prestressed bars preformed hole 6 is used to put
Transversely prestressed bars 4 are put, the longitudinal prestressing muscle preformed hole 7 is used to place longitudinal prestressing muscle 5.
Further, tension and compression of the transversely prestressed bars preformed hole 6 at the edge of the precast concrete beam 1 distinguish two
Arrangement is put；And/or the longitudinal prestressing muscle preformed hole 7 is arranged in the surrounding of the precast concrete beam 1.
Further, the transversely prestressed bars 4 use unbonded prestressing tendon.
The beneficial effects of the utility model are：
1st, the normal traffic on top road surface is not influenced
For the utility model before precast concrete beam jacking, first jacking is mounted with the instrument steel pipe of the edge of a knife, carries out the soil body
Cutting so that in the case where not disturbing surrounding soil normal use, effectively control surrounding environment, followed by beam and
The jacking displacement of steel pipe, controls sedimentation, the influence to upper base road is dramatically reduced.
The utility model effectively controls the amount of deflection of pipe curtain entirety, so as to ensure top road surface due to prestressed use
Normal use.
The utility model is due to the displacement propelling method using precast concrete beam, even if it is bad to run into soil body situation, comprising
Gravel, cobble or barrier, also can guarantee that the precision of higher propulsion.
2nd, construction quality is high
The utility model is due to precast concrete beam and pre-manufactured steel unit is prefabricated in the factory forms, and pipelining causes
Component quality is strictly controlled, so there is sufficient q＆r to ensure.
The utility model is since structure main material is strong concrete, so with excellent corrosion resistance and durable
Property.
3rd, lower cost, shorter duration
The utility model reduces interim since tunnel form prestressed pipe curtain directly serves as a part for permanent structure
Additional work process and expense caused by building, such as the expense of box culvert needed for traditional pipe-roof method.
The utility model improves the absolute altitude of integrated engineering since structure size reduces so that and earthwork excavated volume reduces, therefore
The overall duration and engineering cost has all been reduced.
4th, security higher is excavated
After tunnel form prestressed pipe curtain is formed in the utility model, overall structure has been formed, in tunneling
There is no risk substantially during the soil body in portion.
5th, mechanization degree is high
For the utility model from the excavation for being advanced to tunnel internal, the work of a succession of mechanization, saves a large amount of labours,
At the same time also so that engineering management more efficiently and conveniently.
The utility model proposes tunnel form prestressing force pipe-roof method, it is a large amount of using the prefabricated of standardized production in the factory
Component, enough ensure well-formed stress performance, and with simple structure, speed of application is fast, overall stiffness is big, saving construction cost
And the advantages that duration, have broad application prospects in Underground Construction, especially Municipal Engineering Construction, it is green to meet China
Color is built and the development strategy of industrialized building.
Brief description of the drawings
Fig. 1 is tunnel form prestressed pipe curtain system overall effect figure；
Fig. 2 is circular prestressed pipe curtain system cross-sectional view；
Fig. 3 is box prestressed pipe curtain system cross-sectional view；
Fig. 4 latches schematic diagram between precast concrete beam；
Fig. 5 is pre-manufactured steel unit thin portion schematic diagram；
Reference numeral in figure：
1- precast concrete beams, 2- pre-manufactured steel units, 3- concrete cast-in-situ sections, 4- transversely prestressed bars, 5- in advance should longitudinal direction
Power muscle, 6- transversely prestressed bars preformed holes, 7- longitudinal prestressing muscle preformed holes.
Embodiment
Below by the description to optimum embodiment, make further details of theory to specific embodiment of the present utility model
It is bright.
As shown in Figure 1, the utility model tunnel form prestressed pipe curtain system, by some precast concrete beams 1, pre-manufactured steel
2, concrete cast-in-situ sections 3 of unit, some transversely prestressed bars 4 and longitudinal prestressing muscle 5 form, described some prefabricated mixed
Solidifying soil beam 1 is connected by lock and crack grouting, and is formed by tensioning transversely prestressed bars 4 and longitudinal prestressing muscle 5
It is overall；Construction platform of the pre-manufactured steel unit 2 as transversely prestressed bars 4, for some precast concrete beams 1 apply it is circumferential or
Transverse prestress；The concrete cast-in-situ section 3 is located at the bottom of the pipe curtain system, is the cast-in-place closure of the pipe curtain system
Section.The pre-manufactured steel unit 2, by placing steel reinforcement cage, cast-in-place concrete forms rigid joint.The precast concrete beam 1 and institute
State and transversely prestressed bars preformed hole 6 is both provided with pre-manufactured steel unit 2, the precast concrete beam 1 is provided with longitudinal prestressing
Muscle preformed hole 7.Two rows of arrangements are distinguished in tension and compression of the transversely prestressed bars preformed hole 6 at the edge of the precast concrete beam 1；
And/or the longitudinal prestressing muscle preformed hole 7 is arranged in the surrounding of the precast concrete beam 1.The transversely prestressed bars 4 are adopted
Use unbonded prestressing tendon.
As shown in Fig. 2, when the pipe curtain system is circular prestressed pipe curtain system, all components on cross section,
Firmly it is tied together by ring orientation prestress.The pre-manufactured steel unit 2 is located at the top point of circular prestressed pipe curtain system.
Bottom bottom Dian Chu of the concrete cast-in-situ section 3 positioned at the circular prestressed pipe curtain knot.In this specific embodiment, institute
State prefabricated just unit 2 and there was only 1, at the point of the top.
As shown in figure 3, when the pipe curtain system is box prestressed pipe curtain system, then should by longitudinal direction and the pre- of transverse direction
Power muscle links together each component, these presstressed reinforcing steels cause each contact point between every two components to be in being pressurized
State, forms full prestressing element structure, cooperates together.At this time, which has four pre-manufactured steel units 2, and four
A pre-manufactured steel unit 2 is positioned over four corner points of box prestressed pipe curtain system.
It is illustrated in figure 4 between precast concrete beam and latches schematic diagram；Joint detail figure is given in figure, two pieces of left and right is pre-
It is connected between beams of concrete 1 processed by latching, internal later stage grouting.On opposite two faces of the precast concrete beam 1
Set fluted, the lock is in the groove.
It is illustrated in figure 5 pre-manufactured steel unit thin portion structure diagram；The prefabricated just unit 2 is generally rectangular structure,
All corresponding sites being in contact with precast concrete beam 1, are provided with transversely prestressed bars preformed hole 6, for making laterally in advance should
Power muscle 4 passes through prefabricated just unit 2 and the precast concrete beam 1.
The construction method of the tunnel form prestressed pipe curtain system is as follows：
First, Starting Well and received well are excavated respectively in the building both sides for needing pipe curtain to pass through, afterwards according to first top,
Subsequent both sides sidepiece, the order of last bottom carry out the tunnel form prestressed pipe curtain system construction of three parts.
Above-mentioned top, sidepiece, the construction process of this three parts of bottom are roughly the same, mainly include precast concrete beam jacking
And prestressed stretch-draw.Wherein during construction of bottom plates, it is also necessary to which cast-in-place one section of close segments complete the closure of whole box-shaped pipe curtain.
Below just by taking construction of bottom plates as an example, it is explained in detail.
A, instrument steel pipe top into
Starting Well and received well are being excavated, and after installing and promoting pallet and propeller, by instrument steel pipe, with installation
It is to guide in the development machine of stem, at the design position of merogenesis pushing tow to precast concrete beam.
One important function of instrument steel pipe, is exactly during pushing tow, the soil at precast concrete beam position is led to
Cross steel pipe to transport, i.e., the soil body of the part is replaced with instrument steel pipe, and undertake the intermal force of its original, effectively control and apply
Influence of the work to surrounding environment.
B, the displacement of precast concrete beam promotes
The instrument steel pipe top for the treatment of is shifted onto after position, in same position pushing tow precast concrete beam come the instrument of pushing tow before replacing
Steel pipe.In precast concrete beam pushing tow into after the soil body, to applying longitudinal prestressing between every section precast concrete beam, pass through section
Prestressing force between section, which is connected, is connected whole precast concrete beam, becomes full-prestressed concrete beam.In precast concrete beam
During pushing tow, instrument steel pipe recycles in received well and for the precast concrete beam jacking of adjacent position.
C, pre-manufactured steel unit jacking
After entire row precast concrete beam whole pushing tow in place after, in both ends precast concrete beam adjacent position abreast pushing tow
Enter pre-manufactured steel unit.With instrument steel pipe before the difference is that will not be displaced again after pre-manufactured steel unit jacking in place
Come, but in internal arrangement of reinforcement and as the template of cast-in-place concrete, while the workspace of transverse prestress is also served as, ultimately reside in
It is not removed in overall structure.Pre-manufactured steel unit and precast concrete beam are merogenesis jacking, and site welding is used between section and section
The mode connect is as connection.
D, transverse prestress and joint filling grouting are applied
Before presstressed reinforcing steel is penetrated, the crack part between cleaning element, precast concrete beam fore shaft is washed away with flowing water
Inside and outside satholith, this point is extremely important for the quality of whole engineering, if inside causes crack to insert sand there are satholith
Leakiness is starched, then can seriously affect the service life of presstressed reinforcing steel.
Then in pre-manufactured steel unit, unbonded prestressing tendon, presstressed reinforcing steel are laterally penetrated perpendicular to precast concrete beam
Two rows of arrangements are distinguished in tension and compression at the edge of precast concrete beam.After whole presstressed reinforcing steels penetrate, sand is filled into crack
Slurry, to play the role of waterproof and structure stress.
Tensioning finally is carried out to transversely prestressed bars in pre-manufactured steel unit, transverse prestress is applied to pipe curtain.
E, cast-in-place concrete construction
Top and sidepiece use the construction process of the above, and cast-in-place a part of closure section is also needed at bottom plate.Bottom exists
A cell position is reserved during pushing tow instrument steel pipe and is used as cast-in-place closure, the reserved section is using interim steel plate as earthing
Support.The steel reinforcement cage that then guiding push-in has been bound, penetrates transversely prestressed bars, with the Concrete Filled of cast-in-place high fluidity energy
The position.
F, finally excavate and complete
It is cast-in-place to carrying out arrangement of reinforcement inside pre-manufactured steel unit after treating that upper top, both sides and the pipe of bottom curtain are constructed
The Concrete Filled of high fluidity energy, so far completes whole constructions of tunnel form prestressed pipe curtain system.After completion, coagulation is treated
Soil reaches design strength, you can with internal spoil body, and to constructing inside pipe curtain, finally the end of pipe curtain is carried out
Closure.
It is only to have carried out the explanation of construction method exemplified by box structure is constructed above, circular configuration form of construction work is still
For：Steel unit jacking, precast concrete beam jacking, in length and breadth prestressed stretch-draw, final cast-in-place close segments, with box-structure construction party
Formula is similar, and so it will not be repeated.
The above, is only exemplarily described the utility model, it is clear that the utility model implements not
Limited by aforesaid way, it is any to be familiar with the art as long as employing the methodology and technical solution of the utility model
Technical staff various improvement, the change or replacement that can readily occur in, it is or not improved directly applying to other occasions, exist
Within the scope of protection of the utility model.
Claims (9)
1. a kind of tunnel form prestressed pipe curtain system, it is characterised in that the pipe curtain system is by some precast concrete beams
(1), pre-manufactured steel unit (2), a concrete cast-in-situ section (3), some transversely prestressed bars (4) and longitudinal prestressing muscle (5)
Composition, some precast concrete beams (1) are connected by lock and crack grouting, and pass through tensioning transversely prestressed bars
(4) and longitudinal prestressing muscle (5) forms entirety；Construction platform of the pre-manufactured steel unit (2) as transversely prestressed bars (4),
Apply circumferential or transverse prestress for some precast concrete beams (1)；The concrete cast-in-situ section (3) is located at the pipe curtain system
Bottom, be the pipe curtain system cast-in-place closure section.
2. tunnel form prestressed pipe curtain system as claimed in claim 1, it is characterised in that：The pipe curtain system is circular pre-
Stress tube curtain system, all components on cross section are firmly tied together by ring orientation prestress.
3. tunnel form prestressed pipe curtain system as claimed in claim 1, it is characterised in that：The pipe curtain system is pre- for box
Stress tube curtain system, is linked together each component by longitudinal direction and horizontal presstressed reinforcing steel, forms full prestressing component knot
Structure.
4. tunnel form prestressed pipe curtain system as claimed in claim 2 or claim 3, it is characterised in that：The pre-manufactured steel unit
(2), by placing steel reinforcement cage, cast-in-place concrete forms rigid joint.
5. tunnel form prestressed pipe curtain system as claimed in claim 2, it is characterised in that：Pre-manufactured steel unit (2) position
At the top point of the circular prestressed pipe curtain system.
6. tunnel form prestressed pipe curtain system as claimed in claim 3, it is characterised in that：The box prestressed pipe curtain system
System, has four pre-manufactured steel units (2), four pre-manufactured steel units (2) are positioned over box prestressed pipe curtain system
Four corner points.
7. tunnel form prestressed pipe curtain system as claimed in claim 2 or claim 3, it is characterised in that：The precast concrete beam
(1) and on the pre-manufactured steel unit (2) transversely prestressed bars preformed hole (6) is both provided with, the precast concrete beam (1) is set
There is longitudinal prestressing muscle preformed hole (7)；The transversely prestressed bars preformed hole (6) is used to place transversely prestressed bars (4), described
Longitudinal prestressing muscle preformed hole (7) is used to place longitudinal prestressing muscle (5).
8. tunnel form prestressed pipe curtain system as claimed in claim 2 or claim 3, it is characterised in that：The transversely prestressed bars
Two rows of arrangements are distinguished in tension and compression of the preformed hole (6) at the edge of the precast concrete beam (1)；And/or the longitudinal prestressing muscle
Preformed hole (7) is arranged in the surrounding of the precast concrete beam (1).
9. tunnel form prestressed pipe curtain system as claimed in claim 1, it is characterised in that：The transversely prestressed bars (4)
Using unbonded prestressing tendon.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721245347.8U CN207261017U (en) | 2017-09-27 | 2017-09-27 | Tunnel form prestressed pipe curtain system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721245347.8U CN207261017U (en) | 2017-09-27 | 2017-09-27 | Tunnel form prestressed pipe curtain system |
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| Publication Number | Publication Date |
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| CN207261017U true CN207261017U (en) | 2018-04-20 |
Family
ID=61919474
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
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| CN201721245347.8U Active CN207261017U (en) | 2017-09-27 | 2017-09-27 | Tunnel form prestressed pipe curtain system |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109519175A (en) * | 2018-12-30 | 2019-03-26 | 浙江工业大学 | A kind of rectangular top pipe and its construction method |
| CN109595005A (en) * | 2018-11-20 | 2019-04-09 | 山东万广建设工程有限公司 | The leading type no-dig technique tunnel construction structure of shell and construction method |
| CN114135299B (en) * | 2021-12-06 | 2024-04-26 | 中建三局第一建设工程有限责任公司 | Combined tunnel construction method and supporting structure |
-
2017
- 2017-09-27 CN CN201721245347.8U patent/CN207261017U/en active Active
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109595005A (en) * | 2018-11-20 | 2019-04-09 | 山东万广建设工程有限公司 | The leading type no-dig technique tunnel construction structure of shell and construction method |
| CN109595005B (en) * | 2018-11-20 | 2024-04-02 | 山东万广建设工程有限公司 | Shell advance type non-excavation tunnel construction structure and construction method |
| CN109519175A (en) * | 2018-12-30 | 2019-03-26 | 浙江工业大学 | A kind of rectangular top pipe and its construction method |
| CN114135299B (en) * | 2021-12-06 | 2024-04-26 | 中建三局第一建设工程有限责任公司 | Combined tunnel construction method and supporting structure |
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