CN102155025B - Late poured band type assembled pipe jacking working open caisson - Google Patents
Late poured band type assembled pipe jacking working open caisson Download PDFInfo
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- CN102155025B CN102155025B CN2011100699826A CN201110069982A CN102155025B CN 102155025 B CN102155025 B CN 102155025B CN 2011100699826 A CN2011100699826 A CN 2011100699826A CN 201110069982 A CN201110069982 A CN 201110069982A CN 102155025 B CN102155025 B CN 102155025B
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Abstract
The invention discloses a bidirectional prestressing type preassembled working open caisson which is applied to pipe jacking projects. The open caisson is rectangular and is formed by splicing prefabricated well pieces with U-shaped and straight sections. Cantilever ends at two sides of each U-shaped well piece are different in length; the horizontal U-shaped well pieces are spliced dissymmetrically according to the lengths of the cantilever ends at two ends; and the vertical adjacent U-shaped well pieces are spliced in a staggered way according to the sizes of the cantilever ends. All the vertical well pieces and the horizontal well pieces are connected through prestressed reinforcements. The vertical prestressed reinforcements are connected through connectors at the transversal abutted seams. The vertical prestressed reinforcements in the well pieces of the blade foot section are subjected to non-bonding treatment. Shear key structures are arranged on the sections of prefabricated well pieces at two sides of transversal abutted seams; and the well pieces provided with the shear key structures adopt a matching prefabrication method to ensure the mounting precision of the open caisson. When in prefabrication, the reinforcements are inserted into a prestressing duct. The bidirectional prestressing type preassembled working open caisson disclosed by the invention remarkably improves the filed casting efficiency of the open caisson, shortens the pipe jacking construction period, and accords with the architectural notion of 'low carbon economy and green construction'.
Description
Technical field
The present invention relates to a kind of open caisson active well that is applied to pipe-jacking project in the municipal underground pipeline project, specifically, is a kind of ater-casting type assembling upper pipe working well.
Background technology
Pipe-jacking project is a kind of modern job practices of burying underground utilities underground.Compare with corresponding fluting pipe laying construction method and shield construction, jacking construction has obvious superiority.This method need not excavated the ground notch, but must excavate several active wells at the two ends of laying underground pipeline.Active well can be divided into jacking active well and received well again.Wherein reinforced concrete circular or rectangle active well are comparatively common.The municipal network of underground improvement project of using the pipe-jacking project construction is positioned on the main line road of cities and towns mostly.Present work open caisson generally adopts on-the-spot assembling reinforcement, the job practices of a template concreting.The active well site operation duration is longer, must pass through to the construction section traffic and cause bigger influence.And pollute peripheral environment, had a strong impact near resident normal life.
Summary of the invention
Technical problem: the purpose of this invention is to provide a kind of ater-casting type assembling upper pipe working well that can shorten the active well construction period at the scene.
Technical scheme: prefabricated assembled upper pipe working well of the present invention is along vertically it is spliced by two well blade units more than the sections; Every sections is rectangular, and is made up of two relative U font well sheets and two relative yi word pattern well sheets; U font well sheet is positioned at the minor face place of rectangle; The both sides cantilever end length of U font well sheet is unequal; And the place, inboard right angle at U font well sheet is provided with haunch; The chain edge fit of U font well sheet and yi word pattern well sheet is provided with the ater-casting teeth groove, and the ater-casting is arranged in the ater-casting teeth groove, the prestressed pore passage that all has along continuous straight runs and vertical direction to extend in U font well sheet and the yi word pattern well sheet; The transverse prestressed reinforcing steel bar that U font well sheet in the same sections and yi word pattern well sheet pass prestressed pore passage through horizontal direction connects; The horizontal edge joint position of vertical prestressed reinforcement between adjacent each sections that vertically passes prestressed pore passage connects through reinforcing bar connector; Two U font well sheets of same sections are by the splicing of both sides cantilever end length antisymmetry, and the U font well sheet in vertical adjacent each sections is pressed cantilever end size dislocation splicing.
The present invention is an ater-casting type assembling upper pipe working well, comprises the above well sheet of two sections of the vertical assembly unit of four vertical late poured band and edge; Every sections is rectangular, comprises two relative U font well sheets and two relative yi word pattern well sheets; U font well sheet is positioned at the minor face place of rectangle; Place, inboard right angle at U font well sheet is provided with haunch; Four late poured band are about the both sides cantilever end of two U font well sheets and two yi word pattern well sheets between the end.
Above-mentioned active well all has the prestressed pore passage that extends along vertical in U font well sheet and the yi word pattern well sheet; Connect through reinforcing bar connector along the horizontal edge joint position of vertical prestressing reinforcing bar between adjacent each sections that vertically passes prestressed pore passage.Horizontal edge joint position between adjacent each sections is provided with the shear connector structure, to resist the shearing action that discontinuous construction receives.Consider that in the pipe-jacking project work progress the inside and outside lateral body of active well sidewall reveals different stress forms, the vertical prestressing reinforcing bar in the active well sidewall is two-layer inside and outside being, inside and outside two-layer prestressed reinforcement be positioned at the both sides of shear connector structure.Above-mentioned active well, U font well sheet and yi word pattern well sheet adopt the method for Matching Precast prefabricated, when prefabricated, insert the reinforcing bar plug in the prestressed pore passage.
Above-mentioned active well, in order to increase the caking property of U font well sheet and yi word pattern well sheet and ater-casting, the side of the both sides cantilever end of U font well sheet and the left and right sides end side surface of yi word pattern well sheet are provided with the vertical groove of mutual interlock.
Above-mentioned active well, the well sheet of a nethermost sections are sword pin section well sheet, and vertical prestressing reinforcing bar in the sword pin section well sheet and anchored end anchor all are embedded in the sword pin section well sheet, and the vertical prestressing reinforcing bar in the sword pin section well sheet is handled as the prestressed failure section.The structure that the prestressed failure section is handled is the vertical prestressing rebar surface preservation fat in sword pin section well sheet, and parcel adhesive tape.
Above-mentioned active well, each sections height 2m-3m.
Above-mentioned active well has vertical distributing bar in the late poured band.
Beneficial effect: (1) municipal network of underground improvement project is positioned on the main line road of cities and towns mostly, and the upper pipe working well cast in situs duration is longer, to the bigger influence of the current generation of construction section traffic.Increased bigger current pressure also for simultaneously the road network of periphery.Ater-casting of the present invention type assembling active well can be with large scale active well precast block; Made things convenient for transportation; Reduced requirement to the large-tonnage crane gear; Reduce the duration of open caisson built on-site significantly, significantly improve the construction speed of pipe-jacking project, farthest reduced pipe-jacking project construction section and the current influence of peripheral path traffic.
(2) ater-casting type assembling active well is through being prefabricated in the factory, and the active well contrast with cast-in-place has significantly reduced construction to the pollution of surrounding environment and the influence of resident's normal life.Meet " low-carbon economy, green construction " building theory.
(3) since all the well sheets according to the hoisting and hanging condition of city transport routes with assembling construction point, but piecemeal be prefabricated in the factory, ater-casting type assembling active well needs artificial less at the construction field (site), meets the developing direction of country's " industrialization of construction industry ".
(4) confirm the rational arrangement of reinforcement scheme of prefabricated well sheet through structural analysis, ater-casting type assembling active well satisfies the needs of pipe-jacking project fully on function, and its construction material expense is compared almost suitable with cast-in-place active well.
Description of drawings
Below in conjunction with accompanying drawing and embodiment to further explain of the present invention:
Fig. 1 is the tomograph of prefabricated assembled upper pipe working well.
Fig. 2 is the sketch map of a sections.
Fig. 3 is prefabricated assembled upper pipe working well two dimension elevation.
Fig. 4 is the A-A sectional drawing of Fig. 3.
Fig. 5 is the B-B sectional drawing of Fig. 3.
Fig. 6 is a prestressed reinforcement exhaustion phase partial enlarged drawing.
Fig. 7 is the local reinforcement constitution figure in ater-casting.
Fig. 8 is that transverse joint place reinforcing bar connects sketch map.
Have among the figure: prestressed reinforcement stretch-draw end 1; Ater-casting 2; Haunch 3; U font well sheet (B prefabricated film) 4; Transverse joint 5; Yi word pattern well sheet (A prefabricated film) 6; Hole 7; Prestressed pore passage 8; Shear connector structure 9; Ater-casting teeth groove 10; Prestressed reinforcement 11; Steel failure section 12; The erection work well sections 13 that punches; Erection work well sword pin section well sheet 14; Active well base plate 15; Adhesive tape 16; Indented bars 17; Anchored end ground tackle 18; Active well level master muscle 19; Muscle 20 is vertically constructed in the ater-casting; Reinforcing bar connector 21; Bellows 22.
The specific embodiment
The present invention is prefabricated assembled rectangular top pipe active well.Active well vertically is being divided into three sections, and every sections length is between 2m-3m.Each prefabricated well sheet is vertically to connecting through prestressed reinforcement 11.Adopt fining twisted steel as prestressed reinforcement.Laterally each sections is made up of two U font well sheets 4 (B prefabricated film) and two yi word pattern well sheets 6 (A prefabricated film).Wherein U font well sheet 4 adopts haunch 3 structures.The well sheet is laterally connecting through ater-casting 2.U font well sheet (short side direction) is a push pipe jacking direction.In order to increase the caking property with ater-casting 2, prefabricated well sheet lateral layout is concavo-convex teeth groove 10 forms.
The stretch-draw end is positioned at active well topmost.Be positioned at different well sheets, each of same position section prestressed reinforcement is along vertically being connected by reinforcing bar connector 21 at transverse joint 5 places of structure.For avoiding be connected 22 of the bellowss of well sheet of transverse joint 5 places that spillage can take place, application structure glue is unified shutoff to the transverse joint place before grouting.The prefabricated well sheet section part of transverse joint both sides is provided with shear connector structure (joint of neighbouring two prefabricated well sheets, a prefabricated well sheet has jut, another has corresponding recess) 9.Prestressed reinforcement duct 8 is distributed in shear connector structure both sides.In order to ensure the precision of installing, adopt prefabricated each well sheet of method of Matching Precast.When the well sheet is prefabricated, adopt the Matching Precast method, and in prestressed pore passage, insert reinforcing bar carry out prefabricated, prestressed reinforcement 11 contraposition smoothly when guaranteeing the precast construction assembly unit.
Prestressed reinforcement and anchored end ground tackle 18 in the sword pin section well sheet (the well sheet of a nethermost sections) 14 in the prefabricated active well are embedded in the prefabricated well sheet.Pre-buried prestressed reinforcement has adopted local no binder-treatment, promptly
At rebar surface preservation fat, and parcel adhesive tape 16, the prestressing force partial failure caused.Prestressing force partial failure section 12 is seen accompanying drawing 3,5.
Consider the loading characteristic of structure, during active well was built, the active well level master muscle 19 that A prefabricated film, B prefabricated film are embedded in the structure of ater-casting was processed the U font, and mutual dislocation is pre-buried.Arrange the vertical structure 20 in six roots of sensation ater-casting between two semicircle reinforcing bar sections in the ater-casting, increased the bulk strength of ater-casting structure.The local reinforcement placement in ater-casting is seen accompanying drawing 7.The active well level 19 that stretch out the precast construction both sides is embedded in the ater-casting 2, level master's cross dystopia of muscle and tendon position overlap joint of same position, on-the-spot colligation or welding after-pouring concrete.
The ater-casting structure is fluid concrete after the vertical prestressing reinforced bar stretching is accomplished, and the strength grade of concrete of cast will be higher than precast construction.The ater-casting formwork can use weldering sealing sheet split bolt to clamp.
The U font well sheet of the vertical interstitial segment of active well (erection work well punch sections 13) is reserved push pipe hole 7 at design height, the pre-buried structure steel plate of hole week sheet.
The B prefabricated film of both sides is installed earlier during the mounting shaft sheet, after fill in the A prefabricated film from the side.Be to guarantee the stability of erection stage A prefabricated film, the overlap welding that can keep at a certain distance away of A prefabricated film, B prefabricated film pre-buried U font active well level level master muscle 19 in the structure of ater-casting.
The present invention is an ater-casting type assembling rectangular top pipe active well, has shortened the Cast-in-situs type active well construction period at the scene, has reduced to the pollution of site environment and to the influence that traffic, human settlement cause, and has adapted to the development of " industrialization of construction industry ".Its active well well sheet is prefabricated in the factory, be transported to the scene after, connect through vertical prestressed reinforcement, and build the ater-casting and make the active well global formation, it is in place to sink at last.
Ater-casting of the present invention type assembling rectangle active well is divided into some sections along vertical (highly) direction, and each well sheet vertically connects through the prestressed reinforcement in the reserving hole channel in the well sheet.The length of each prestressed reinforcement is consistent along vertical height with each well sheet.Vertical each section prestressed reinforcement of same position is along vertically being fused by reinforcing bar connector at the transverse joint place of structure.Adopt finish rolling deformed bar as prestressed reinforcement from the loading characteristic analysis of pipe-jacking project active well.Consider transportation and the convenience that lifts, horizontal every sections active well is divided into four, and section is U font and yi word pattern respectively.Yi word pattern well sheet is positioned at place, the long limit of rectangle, and U font well sheet is positioned at rectangle minor face place, and each well sheet of same sections connects through late poured band.
Claims (7)
1. the prefabricated assembled upper pipe working well of ater-casting type is characterized in that: along vertically it is spliced by two well blade units more than the sections; Every sections is rectangular, and is made up of two relative U font well sheets (4) and two relative yi word pattern well sheets (6); U font well sheet (4) is positioned at the minor face place of rectangle; The both sides cantilever end length of U font well sheet is unequal; And the place, inboard right angle at U font well sheet is provided with haunch (3); The chain edge fit of U font well sheet and yi word pattern well sheet is provided with ater-casting teeth groove (10), and ater-casting (2) are arranged in ater-casting teeth groove (10), the prestressed pore passage (8) that all has along continuous straight runs and vertical direction to extend in U font well sheet and the yi word pattern well sheet; The transverse prestressed reinforcing steel bar that U font well sheet (4) in the same sections and yi word pattern well sheet (6) pass prestressed pore passage through horizontal direction connects; The horizontal edge joint position of vertical prestressed reinforcement between adjacent each sections that vertically passes prestressed pore passage connects through reinforcing bar connector; Two U font well sheets of same sections are by the splicing of both sides cantilever end length antisymmetry, and the U font well sheet in vertical adjacent each sections is pressed cantilever end size dislocation splicing.
2. type prefabricated assembled upper pipe working well in ater-casting as claimed in claim 1 is characterized in that: the horizontal piece between adjacent each sections is provided with shear connector structure (9).
3. type prefabricated assembled upper pipe working well in ater-casting as claimed in claim 1 is characterized in that: U font well sheet and the yi word pattern well sheet of forming active well adopt the method for Matching Precast prefabricated, when prefabricated, insert reinforcing bar in the prestressed pore passage.
4. type prefabricated assembled upper pipe working well in ater-casting as claimed in claim 1 is characterized in that: the transverse prestressed reinforcing steel bar in the active well sidewall with vertical prestressed reinforcement be inside and outside two-layer distribution.
5. the prefabricated assembled upper pipe working well of ater-casting as claimed in claim 1 type; It is characterized in that: the well sheet of a nethermost sections is a sword pin section well sheet; Vertical prestressed reinforcement in the sword pin section well sheet and anchored end ground tackle are embedded in the sword pin section well sheet, and the vertical prestressed reinforcement in the sword pin section well sheet is handled as the prestressed failure section.
6. type prefabricated assembled upper pipe working well in ater-casting as claimed in claim 5 is characterized in that: the structure that the prestressed failure section is handled is the anticorrosion grease of vertical prestressed reinforcement surfaces coated in sword pin section well sheet, and parcel adhesive tape.
7. type prefabricated assembled upper pipe working well in ater-casting as claimed in claim 1 is characterized in that: each sections height 2m-3m.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011100699826A CN102155025B (en) | 2011-03-23 | 2011-03-23 | Late poured band type assembled pipe jacking working open caisson |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011100699826A CN102155025B (en) | 2011-03-23 | 2011-03-23 | Late poured band type assembled pipe jacking working open caisson |
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| Publication Number | Publication Date |
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| CN102155025A CN102155025A (en) | 2011-08-17 |
| CN102155025B true CN102155025B (en) | 2012-05-23 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN2011100699826A Expired - Fee Related CN102155025B (en) | 2011-03-23 | 2011-03-23 | Late poured band type assembled pipe jacking working open caisson |
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Cited By (1)
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| CN103195158A (en) * | 2013-04-03 | 2013-07-10 | 济南城建集团有限公司 | Municipal drainage pipeline slurry balance pipe-jacking construction method |
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| CN102644296A (en) * | 2012-05-09 | 2012-08-22 | 东南大学 | Prefabricate assembly type pipe jacking working well |
| CN102877487B (en) * | 2012-08-28 | 2015-12-09 | 李尚喜 | The construction method of the solid power well template Facilities Construction of highway |
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| CN102155025A (en) | 2011-08-17 |
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