CN202417517U - Prestressed pipe piece - Google Patents
Prestressed pipe piece Download PDFInfo
- Publication number
- CN202417517U CN202417517U CN2012200335707U CN201220033570U CN202417517U CN 202417517 U CN202417517 U CN 202417517U CN 2012200335707 U CN2012200335707 U CN 2012200335707U CN 201220033570 U CN201220033570 U CN 201220033570U CN 202417517 U CN202417517 U CN 202417517U
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- prestressed
- pipe piece
- shield
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- steel
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Abstract
The utility model discloses a prestressed pipe piece. The pipe piece is provided with a plurality of steel-stranded-wire hole channels which are distributed along the axis, wherein on the circumference formed by the plurality of pipe pieces, the corresponding steel-stranded-wire hole channels are communicated; and each steel-stranded-wire hole channel is provided with an anchor groove. A method for carrying out shield-tunnel prestressed lining construction by adopting the prestressed pipe piece comprises the following steps of: (1) step of assembly of shield tunneling pipe pieces; (2) step of tensioning the steel stranded wires along the steel-stranded-wire hole channels by the anchor grooves on the pipe pieces; (3) step of refilling concrete; and the shield-tunnel prestressed lining construction is realized by the steps. The prestressed pipe piece disclosed by the utility model has the advantages that by adoption of the structure, in construction, the prestressed pipe piece can be directly assembled like installing the common pipe piece when in shield tunneling, and the steel stranded wires are tensioned by the anchor grooves, so that the pipe piece is prestressed to resist the pressure in a shield tunnel (such as water pressure); and for the shield prestressed tunnel adopting the prestressed pipe piece, the construction period is reduced by a half, and the investment can be reduced by a half.
Description
Technical field
The utility model relates to the construction field in shield structure prestressing force tunnel, particularly a kind of shield tunnel pre-stress lining job practices and used prestressing force section of jurisdiction.
Background technology
Along with the continuous development of China's shield-tunneling construction technology, the design of shield tunnel prestressing force has been a kind of trend.Chinese patent 201110125181.7 discloses a kind of shield structure tunnel prestressing force composite lining water-conveyance tunnel, adopts the separate type design, in the process of shield driving, carries out earlier common pipe sheet assembling; After shield-tunneling construction finishes; The inboard cast-in-situ prestressed concrete in common section of jurisdiction, this job practices comparatively take a lot of work, time-consuming, material consumption is also bigger; And because cast-in-place inner lining concrete blibbing is difficult for eliminating inside concrete reinforcing bar, the intensive concreting leakiness that causes of bellows.Cost performance is low, the engineering time is long, is difficult to satisfy the requirement of modern project.
Summary of the invention
The utility model technical problem to be solved provides a kind of prestressing force section of jurisdiction, can overcome the deficiency of prior art, and is simple and efficient to handle, the activity duration is short, material consumption is low, it is half the duration to be shortened.
For solving the problems of the technologies described above; The technical scheme that the utility model adopted is: a kind of prestressing force section of jurisdiction; The section of jurisdiction is provided with a plurality of steel strand ducts that distribute along axis; On the circumference that a plurality of sections of jurisdiction are formed, communicate with one another between the corresponding steel strand duct, every steel strand duct is provided with a ground tackle groove.
Described ground tackle groove is to the inside of circumference.
A kind ofly adopt above-mentioned prestressing force section of jurisdiction to carry out shield tunnel pre-stress lining job practices, may further comprise the steps:
One, the step of shield driving pipe sheet assembling;
Two, through the step of the ground tackle groove on the section of jurisdiction along steel strand duct stretch-draw steel strand;
Three, the step of concrete backfill;
Realize the construction of shield tunnel pre-stress lining through above-mentioned steps.
In step 1, from shield tunnel bottom upwards symmetrical successively assembly unit be connected the section of jurisdiction, the accurate positioning of steel strand duct, UNICOM does not have faulting of slab ends;
With the position, middle and lower part of section of jurisdiction interlaced arrangement annulus of reserving the ground tackle groove, be convenient to wear anchor, stretch-draw, backfill operation in the tunnel;
Other sections of jurisdiction of last assembly unit become the domain, make and reserve the steel strand duct Cheng Huan of UNICOM in the section of jurisdiction;
Reserve iron wire in the steel strand duct, in the iron wire termination cotton balls is set, slide through iron wire termination cotton balls, whether inspection steel strand duct is unimpeded.
In step 2, utilize the iron wire that is reserved in the steel strand duct that steel strand are worn the anchor operation;
Ground tackle, jack and tensioning equipment are installed;
At shield driving process stretch-draw steel strand, stretch-draw is carried out according to two-stage, and the 1st grade of stretching force is that the 15 ~ 30%, 2nd grade of stretch-draw reaches 100%, steel strand symmetry stretch-draw in an endless tube sheet scope, or by designing requirement stretch-draw;
Remove jack and tensioning equipment.
In step 3, have or not bonding according to steel strand, in the anchor cable duct, be pressed into different slurries bodies, wherein there are the bonding steel strand to use cement grout slip casting, non-bending steel cable adopts grease slip casting;
Will with ground tackle groove concrete chisel hair after clean out;
The harsh concrete that section of jurisdiction intensity is identical is poured the ground tackle groove into, and uses the vibrator vibration compacting.
A kind of prestressing force section of jurisdiction that the utility model provides; Through adopting above-mentioned structure, can the equally direct assembly unit in common section of jurisdiction be installed at the shield driving time image during construction, through ground tackle groove stretch-draw steel strand; Make the section of jurisdiction prestressed, with opposing shield tunnel pressure inside (for example water pressure).
Prestressed stretch-draw of the prior art must reach 80% o'clock of design strength at concrete strength, and the side allows stretch-draw.
Control stress for prestressing adopts 0～15% σ con, 15～30% σ con, 30～60% σ con, and 60%～103% σ con holds the multistage stretching mode that stress behind the lotus 5min returns to 100% δ con.And the time of concrete setting of waiting for has been saved owing to customize in factory in advance in the section of jurisdiction in the utility model therefore, and can reduce the progression of stretch-draw, only needs two-stage stretch-draw to meet design requirement usually, thereby has significantly improved efficiency of construction.
Adopt the shield structure prestressing force constructing tunnel duration of the utility model to reduce half, investment can reduce half the.Thereby constructing operation is simple and efficient, the activity duration is short, the low construction cost that greatly reduces of material consumption, because prefabrication is adopted in the section of jurisdiction, the steel strand position control accuracy is high, and total quality is higher than cast in situs.
Description of drawings
Below in conjunction with accompanying drawing and embodiment the utility model is described further.
Fig. 1 is the main TV structure sketch map of the utility model.
Fig. 2 is the side-looking structural representation of the utility model.
Fig. 3 is the sectional view of single section of jurisdiction in the utility model.
The specific embodiment
A kind of prestressing force section of jurisdiction, section of jurisdiction 1 are provided with a plurality of steel strand ducts 2 that distribute along axis, on the circumference that a plurality of sections of jurisdiction 1 are formed, communicate with one another between the corresponding steel strand duct 2, and every steel strand duct 2 is provided with a ground tackle groove 3.
Described ground tackle groove 3 interlaced arrangement on circumference.
Described ground tackle groove 3 is to the inside of circumference.
A kind ofly adopt above-mentioned prestressing force section of jurisdiction to carry out shield tunnel pre-stress lining job practices, may further comprise the steps:
One, the step of shield driving pipe sheet assembling;
(1) from shield tunnel bottom upwards symmetrical successively assembly unit standard section of jurisdiction be connected the section of jurisdiction, the accurate positioning of steel strand duct, UNICOM does not have faulting of slab ends.
(2) position, middle and lower part of section of jurisdiction interlaced arrangement annulus of ground tackle groove be will reserve, anchor, stretch-draw, backfill operation will be convenient to wear in the tunnel.
(3) the last assembly unit wedge shape section of jurisdiction or the section of jurisdiction of binding, the section of jurisdiction is combined into the domain, makes and reserves the steel strand duct Cheng Huan of UNICOM in the section of jurisdiction.
(4) reserve iron wire in the steel strand duct, slide through iron wire termination cotton balls, whether inspection steel strand duct is unimpeded.
Two, through the step of the ground tackle groove 3 on the section of jurisdiction 1 along steel strand duct 2 stretch-draw steel strand;
(1) utilize the iron wire that is reserved in the steel strand duct that steel strand are worn the anchor operation.
(2) ground tackle, jack and tensioning equipment are installed.
(3) at shield driving process stretch-draw steel strand, stretch-draw can be carried out according to two-stage, and the 1st grade of stretching force is that the 15 ~ 30%, 2nd grade of stretch-draw reaches 100%, and the steel strand symmetry is carried out stretch-draw or by designing requirement stretch-draw in an endless tube sheet scope.
(4) remove jack and tensioning equipment.
Three, the step of concrete backfill;
(1) requires to have or not bonding according to different designs, be pressed into different slurries bodies in the steel strand duct, (have the bonding steel strand to use cement grout slip casting, non-bending steel cable adopts grease slip casting); And airtight steel strand duct.
(2) with cleaning out behind the ground tackle groove concrete surface cutter hair.
(3) pour the harsh concrete identical into the ground tackle groove, and use the vibrator vibration compacting, concrete surface is received light with section of jurisdiction intensity.
(4) in the maintenance of concrete surface brushing curing fluid capable.
Realize the construction of shield tunnel pre-stress lining through above-mentioned steps.
The concrete of backfill adopts the concrete identical with section of jurisdiction 1.
The function that the utility model will have shield structure prestressing force tunnel branch section of jurisdiction outer lining and prestressed concrete liner now merges; Just but stretch-draw is shortened half with the tunnel duration behind pipe sheet assembling, though prefabricated section of jurisdiction thickness need increase, has cancelled the concrete engineering quantity of prestressed in-situ depositing; Investment significantly reduces; The section of jurisdiction produces and is factory operation simultaneously, and concrete quality is higher than the cast-in-situ concrete quality, and the shield tunnel section does not have phenomenons such as bubble pitted skin; Have rational in infrastructurely, constructing operation is advantage conveniently.
Claims (2)
1. prestressing force section of jurisdiction; It is characterized in that: section of jurisdiction (1) is provided with a plurality of steel strand ducts (2) that distribute along axis; On the circumference that a plurality of sections of jurisdiction (1) are formed, communicate with one another between the corresponding steel strand duct (2), every steel strand duct (2) is provided with a ground tackle groove (3).
2. a kind of prestressing force according to claim 1 section of jurisdiction is characterized in that: described ground tackle groove (3) is to the inside of circumference.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012200335707U CN202417517U (en) | 2012-02-03 | 2012-02-03 | Prestressed pipe piece |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012200335707U CN202417517U (en) | 2012-02-03 | 2012-02-03 | Prestressed pipe piece |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202417517U true CN202417517U (en) | 2012-09-05 |
Family
ID=46742290
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2012200335707U Expired - Fee Related CN202417517U (en) | 2012-02-03 | 2012-02-03 | Prestressed pipe piece |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202417517U (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102536265A (en) * | 2012-02-03 | 2012-07-04 | 葛洲坝集团第五工程有限公司 | Shield tunneling prestress lining construction method and used prestressed pipe pieces |
| CN103790598A (en) * | 2014-02-12 | 2014-05-14 | 同济大学 | Method for manufacturing shield tunnel longitudinal prestressing concrete lining segment |
| CN105178983A (en) * | 2015-08-24 | 2015-12-23 | 济南轨道交通集团有限公司 | Circumferential prestress strengthening tunnel segment and manufacturing method |
| CN107882577A (en) * | 2017-11-21 | 2018-04-06 | 中国电建集团铁路建设有限公司 | A kind of shield tunnel export ＆ import section of jurisdiction applies prestressed construction method |
-
2012
- 2012-02-03 CN CN2012200335707U patent/CN202417517U/en not_active Expired - Fee Related
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102536265A (en) * | 2012-02-03 | 2012-07-04 | 葛洲坝集团第五工程有限公司 | Shield tunneling prestress lining construction method and used prestressed pipe pieces |
| CN102536265B (en) * | 2012-02-03 | 2014-09-03 | 葛洲坝集团第五工程有限公司 | Shield tunneling prestress lining construction method and used prestressed pipe pieces |
| CN103790598A (en) * | 2014-02-12 | 2014-05-14 | 同济大学 | Method for manufacturing shield tunnel longitudinal prestressing concrete lining segment |
| CN103790598B (en) * | 2014-02-12 | 2016-04-06 | 同济大学 | A kind of preparation method of shield tunnel longitudinal prestressing concrete lining pipe piece |
| CN105178983A (en) * | 2015-08-24 | 2015-12-23 | 济南轨道交通集团有限公司 | Circumferential prestress strengthening tunnel segment and manufacturing method |
| CN107882577A (en) * | 2017-11-21 | 2018-04-06 | 中国电建集团铁路建设有限公司 | A kind of shield tunnel export ＆ import section of jurisdiction applies prestressed construction method |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20120905 Termination date: 20190203 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |