CN214301846U - Upper and lower block-divided open-cut tunnel prefabricated lining prestress connecting structure - Google Patents
Upper and lower block-divided open-cut tunnel prefabricated lining prestress connecting structure Download PDFInfo
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- CN214301846U CN214301846U CN202021913428.2U CN202021913428U CN214301846U CN 214301846 U CN214301846 U CN 214301846U CN 202021913428 U CN202021913428 U CN 202021913428U CN 214301846 U CN214301846 U CN 214301846U
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Abstract
The utility model belongs to the technical field of underground structure engineering, in particular to an up-and-down blocked open cut tunnel prefabricated lining prestressed connecting structure, which is formed by longitudinally splicing a plurality of ring lining rings; the lining ring comprises a prefabricated lining upper block and a prefabricated lining lower block which are oppositely arranged up and down, the prefabricated lining upper block comprises a top plate and two upper side walls connected with two ends of the top plate, and the prefabricated lining lower block comprises a bottom plate and two lower side walls connected with two ends of the bottom plate; the roof go up the side wall down the side wall with all correspond in the bottom plate and be equipped with a plurality of vertical prestressing force stretch-draw holes that run through vertically, stretch-draw in the vertical prestressing force stretch-draw hole that corresponds vertically has same root prestressing force twisted steel, just it has the pea gravel concreten to press to annotate in the vertical prestressing force stretch-draw hole. The utility model discloses can practice thrift the manpower, reduction of erection time, it is accurate to prefabricated lining cutting applied stress size control, can realize the safe quick construction of prefabricated lining cutting.
Description
Technical Field
The utility model belongs to the technical field of underground structure engineering, concretely relates to prefabricated lining prestressed connection structure of open cut tunnel of upper and lower piecemeal.
Background
At present, in the field of engineering construction, the application of prefabricated parts is more and more extensive, in particular in the fields of buildings, municipal administration and bridges. The prefabricated components are processed in a factory, and the processed components are conveyed to a construction site for hoisting and splicing construction. The construction of the prefabricated parts can reduce the volume of cast-in-place concrete on site and environmental pollution, and can improve the overall construction quality. The construction of the prefabricated parts is critical to how the connection between the adjacent parts is made,
the connection of the prefabricated parts is diversified, the prestressed connection is used as a dry connection form of the prefabricated parts and widely applied to the engineering fields of buildings, bridges, municipal works and the like, and the form has the advantages of high structural connection speed, quick stress on joints without maintenance and the like. The existing tunnel prefabricated lining is mostly connected by bolts. Bolt connection form exists that bolt hand hole is less, and on-the-spot manual work is with torque wrench pretension section of jurisdiction bolt, and intensity of labour is big, and operating time is long, leads to the section of jurisdiction to assemble speed slowly, and then influences shortcomings such as the whole construction progress in tunnel.
Disclosure of Invention
In order to overcome the not enough of above-mentioned prior art existence, the utility model aims at providing a prefabricated lining prestressing force connection structure of open cut tunnel of upper and lower piecemeal practices thrift the construction manpower, shortens construction period, and it is comparatively accurate to control prefabricated lining stressing size, can realize the safe quick construction of prefabricated lining.
In order to realize the purpose, the technical scheme of the utility model is that the connecting structure is a prefabricated lining prestress connecting structure of the open cut tunnel with up and down blocks, and the connecting structure is formed by longitudinally splicing multiple ring lining rings; the lining ring comprises a prefabricated lining upper block and a prefabricated lining lower block which are oppositely arranged up and down, the prefabricated lining upper block comprises a top plate and two upper side walls connected with two ends of the top plate, and the prefabricated lining lower block comprises a bottom plate and two lower side walls connected with two ends of the bottom plate; the roof go up the side wall down the side wall with all correspond in the bottom plate and be equipped with a plurality of vertical prestressing force stretch-draw holes that run through vertically, stretch-draw in the vertical prestressing force stretch-draw hole that corresponds vertically has same root prestressing force twisted steel, just it has the pea gravel concreten to press to annotate in the vertical prestressing force stretch-draw hole.
Furthermore, the top plate is also connected with an upper partition plate which is positioned between the two upper side walls; the bottom plate is also connected with a lower partition plate which is positioned between the two lower side walls; the top plate, go up the baffle down the baffle with all correspond in the bottom plate and be equipped with a plurality of vertical prestressing force stretch-draw holes that run through, stretch-draw in the vertical corresponding vertical prestressing force stretch-draw hole in vertical has same root prestressing force twisted steel, just it has the pea gravel concreten to press to annotate in the vertical prestressing force stretch-draw hole.
Furthermore, the top surface of the top plate is provided with first vertical notches corresponding to the vertical prestress tensioning holes, the side surfaces of the lower side walls are provided with second vertical notches corresponding to the vertical prestress tensioning holes, and the side surfaces of the lower partition plate are provided with third vertical notches corresponding to the vertical prestress tensioning holes; the first vertical notch, the second vertical notch and the third vertical notch are communicated with the corresponding vertical prestress tensioning holes and are filled with fine aggregate concrete.
Furthermore, longitudinal prestress tensioning holes which longitudinally penetrate are formed in the top plate, the upper side wall, the lower side wall and the bottom plate of each lining ring, the same permanent prestress steel strand is tensioned in the longitudinal prestress tensioning hole which longitudinally corresponds to each lining ring, and fine aggregate concrete is injected in the longitudinal prestress tensioning hole.
Furthermore, the top surface of the top plate of each lining ring is provided with a first longitudinal notch at a position corresponding to the longitudinal prestress tensioning hole, and the upper side wall, the lower side wall and the bottom plate of each lining ring are provided with a second longitudinal notch at a position corresponding to the longitudinal prestress tensioning hole; the first longitudinal notch and the second longitudinal notch are communicated with the corresponding longitudinal prestress tensioning holes and are filled with fine aggregate concrete.
Furthermore, the longitudinal abutted seam face of the lining ring is brushed with epoxy resin glue.
Compared with the prior art, the utility model discloses following beneficial effect has:
(1) the utility model provides a prefabricated lining prestressed connection structure of open cut tunnel of upper and lower piecemeal compares in the prefabricated lining connection way of current tunnel, can practice thrift the construction manpower, shortens construction period to in the aspect of the construction, to prefabricated lining application stress size control accuracy, thereby realize the safe quick construction of prefabricated lining;
(2) the utility model discloses a reserve vertical prestressing force stretch-draw hole and longitudinal prestressing force stretch-draw hole on prefabricated lining cutting upper segment and prefabricated lining cutting lower segment to carry out vertical prestressing force connection and carry out longitudinal prestressing force connection between the lining cutting ring to prefabricated lining cutting upper segment and prefabricated lining cutting lower segment, reserve different forms of prestressing force stretch-draw groove mouth on prefabricated lining cutting upper segment and prefabricated lining cutting lower segment simultaneously, so that carry out prestressing force stretch-draw; the vertical prestress connection and the longitudinal prestress connection jointly act on the lining rings, and the vertical direction of the lining rings and the adjacent lining rings are respectively tensioned and fastened, so that the integrity of the whole structure is improved;
(3) the utility model discloses when carrying out vertical prestressing force and connecting between the lining ring, assemble at the lining ring and accomplish the back at first carry out interim vertical prestressing force to this ring lining and preceding ring lining and connect, so circulate to vertically assemble behind a plurality of ring lining rings formation lining cutting segments, adopt the diagonal angle form to connect the interim vertical prestressing force between each adjacent lining cutting ring in the stage and relieve one by one and adopt whole section steel strand wires to run through all lining rings in the stage and apply permanent vertical prestressing force and carry out vertical permanent prestressing force and connect, improve the lining ring and vertically assemble the precision.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the drawings without creative efforts.
Fig. 1 is a schematic structural view of a prefabricated lining prestressed connection structure of an open-cut tunnel divided into upper and lower blocks according to an embodiment of the present invention;
FIG. 2 is a schematic view of a permanent connection of lining rings provided by an embodiment of the present invention;
fig. 3 is a schematic diagram of temporary connection between two adjacent lining rings according to an embodiment of the present invention;
in the figure: 1. the prefabricated lining upper block, the prefabricated lining lower block, the prefabricated lining upper block, the prefabricated lining lower block, the prefabricated lining upper block, the prefabricated lining lower block, the prefabricated lining upper block, 4, the first longitudinal notch, the second longitudinal notch, the prefabricated lining upper block, 6, the prefabricated lining upper block, the first longitudinal notch, 6, the longitudinal notch, the vertical notch, 9, the vertical notch, 11, the vertical notch, 9, the vertical notch, 10, the vertical notch, 11, the.
Detailed Description
The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative efforts belong to the protection scope of the present invention.
In the description of the present invention, it is to be understood that the terms "center", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", and the like indicate orientations or positional relationships based on those shown in the drawings, and are merely for convenience of description and simplicity of description, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore, are not to be construed as limiting the present invention.
The terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature; in the description of the present invention, "a plurality" means two or more unless otherwise specified.
As shown in fig. 1, the embodiment provides a prefabricated lining prestressed connecting structure of an open-cut tunnel divided into upper and lower blocks, which is formed by longitudinally splicing multiple ring lining rings; the lining ring comprises a prefabricated lining upper block 1 and a prefabricated lining lower block 2 which are arranged oppositely up and down, the prefabricated lining upper block 1 comprises a top plate and two upper side walls connected with two ends of the top plate, and the prefabricated lining lower block 2 comprises a bottom plate and two lower side walls connected with two ends of the bottom plate; the roof go up the side wall down the side wall with all correspond in the bottom plate and be equipped with a plurality of vertical prestressing force stretch-draw holes 11 that run through vertically, stretch-draw in the vertical prestressing force stretch-draw hole 11 that corresponds vertically has same root prestressing force twisted steel 10, just it has the pea gravel concreten to press the notes in the vertical prestressing force stretch-draw hole 11. The lining ring of the embodiment is formed by splicing the prefabricated lining upper block 1 and the prefabricated lining lower block 2 and then connecting the spliced prefabricated lining upper block and the prefabricated lining lower block through prestress, so that the formwork supporting process can be reduced, the construction space of a lining on site is reduced, the mould, the labor and the construction period are saved, and the safe and rapid construction of the prefabricated lining can be realized; meanwhile, the lining blocks are prefabricated, so that the lining block can be produced on a factory production line, the construction is convenient, the quality is easy to control, the construction influence is small, and the material waste is less.
Furthermore, the top plate is also connected with an upper partition plate which is positioned between the two upper side walls; the bottom plate is also connected with a lower partition plate which is positioned between the two lower side walls; the roof go up the baffle down the baffle with all correspond in the bottom plate and be equipped with a plurality of vertical prestressing force stretch-draw holes 11 that run through, stretch-draw in the vertical corresponding vertical prestressing force stretch-draw hole 11 in vertical has same root prestressing force twisted steel 10, just it has the pea gravel concreten to press the notes in the vertical prestressing force stretch-draw hole 11.
Furthermore, the top surface of the top plate is provided with a first vertical notch 7 corresponding to the vertical prestress tensioning hole 11, the side surface of the lower side wall is provided with a second vertical notch 8 corresponding to the vertical prestress tensioning hole 11, and the side surface of the lower partition plate is provided with a third vertical notch 9 corresponding to the vertical prestress tensioning hole 11; the first vertical notch 7, the second vertical notch 8 and the third vertical notch 9 are communicated with the corresponding vertical prestress tensioning holes 11 and are filled with fine aggregate concrete. As shown in fig. 1, in the present embodiment, the prestressed rebar 10 in the side wall is subjected to vertical permanent prestress tensioning through the first vertical notch 7 on the top plate and the second vertical notch 8 on the lower side wall, and the prestressed rebar 10 in the partition plate is subjected to vertical permanent prestress tensioning through the first vertical notch 7 on the top plate and the third vertical notch 9 on the lower partition plate.
Furthermore, longitudinal prestress tensioning holes 6 which longitudinally penetrate are formed in the top plate, the upper side wall, the lower side wall and the bottom plate of each lining ring, the same permanent prestress steel strand 12 is tensioned in the longitudinal prestress tensioning hole 6 which longitudinally corresponds to each lining ring, and fine aggregate concrete is injected in the longitudinal prestress tensioning holes 6. In the embodiment, the prefabricated lining upper block 1 and the prefabricated lining lower block 2 are connected through vertical prestress to form a lining ring, and all lining rings in the segments are tensioned through the permanent prestress steel strands 12 to be connected through longitudinal permanent prestress, so that the safe and rapid construction of the prefabricated lining is realized.
Furthermore, the top surface of the top plate of each lining ring is provided with a first longitudinal notch 4 corresponding to the longitudinal prestress tensioning hole 6, and the upper side wall, the lower side wall and the bottom plate of each lining ring are provided with a second longitudinal notch 5 corresponding to the longitudinal prestress tensioning hole 6; the first longitudinal notch 4 and the second longitudinal notch 5 are communicated with the corresponding longitudinal prestress tensioning holes 6 and are filled with fine aggregate concrete. In the embodiment, the top plate, the upper side wall, the lower side wall and the bottom plate are respectively subjected to longitudinal prestress tensioning through the first longitudinal notch 4 on the top plate, the second longitudinal notch 5 on the upper side wall, the second longitudinal notch 5 on the lower side wall and the second longitudinal notch 5 on the bottom plate. The longitudinal prestress tensioning comprises temporary longitudinal prestress tensioning and permanent longitudinal prestress tensioning, the top plates, the upper side walls, the lower side walls and the bottom plates of the two adjacent ring lining rings are respectively subjected to temporary prestress tensioning through the first longitudinal notches 4 and the second longitudinal notches 5 on the two adjacent ring lining rings, and after a section is longitudinally assembled, the top plates, the upper side walls, the lower side walls and the bottom plates of all lining rings in the section are subjected to permanent prestress tensioning through the first longitudinal notches 4 and the second longitudinal notches 5 on the section head and tail lining rings.
Furthermore, the longitudinal abutted seam surfaces of the lining rings are brushed with epoxy resin glue to increase the connecting force between the adjacent lining rings.
As shown in fig. 1 to fig. 3, the present embodiment further provides a method for connecting an open cut tunnel prefabricated lining with upper and lower blocks by prestress, which includes the following steps:
1) prefabricating the prefabricated lining upper block 1 and the prefabricated lining lower block 2 in a factory, and transporting to an open cut tunnel construction site;
2) splicing the prefabricated lining upper block 1 and the prefabricated lining lower block 2 to form a lining ring;
the method specifically comprises the following steps: splicing the prefabricated lining upper block 1 and the prefabricated lining lower block 2 vertically, then penetrating prestressed threaded steel bars 10 into vertical prestressed tensioning holes 11 which are vertically corresponding to the prefabricated lining upper block 1 and the prefabricated lining lower block 2, and performing vertical permanent prestressed tensioning on the prestressed threaded steel bars 10 through vertical notches in the prefabricated lining upper block 1 and the prefabricated lining lower block 2 to extrude a prefabricated lining vertical splicing seam 3; and after tensioning is finished, grouting and plugging are carried out on all the vertical prestress tensioning holes 11, and the vertical notches are sealed by adopting fine aggregate concrete.
3) Coating epoxy resin glue on the longitudinal joint faces of two adjacent lining rings to increase the connecting force between the two adjacent lining rings; then, penetrating the temporary prestressed steel strand 14 into the longitudinal prestressed tensioning holes 6 at the same point positions of the two adjacent ring lining rings, and performing longitudinal temporary prestressed tensioning on the temporary prestressed steel strand 14 through longitudinal notches in the two adjacent ring lining rings;
4) after a plurality of ring lining rings are longitudinally assembled, the temporary prestress connection between two adjacent ring lining rings in each phase in the segment is released, then the permanent prestress steel strands 12 penetrate through the longitudinal prestress tensioning holes 6 at the same point position of all the lining rings in the segment, and the permanent prestress steel strands 12 are longitudinally and permanently tensioned through longitudinal notches in the head and tail lining rings;
5) and after the longitudinal permanent prestress tensioning is finished, grouting and plugging all longitudinal prestress tensioning holes 6 in the segments, and sealing the longitudinal notches by adopting fine aggregate concrete.
Further, in the step 3), after the epoxy resin glue is coated, temporary prestressed steel strands 14 are respectively penetrated into longitudinal prestressed tensioning holes 6 at the same point positions on the top plate, the upper side wall, the lower side wall and the bottom plate of the two adjacent ring lining rings, and the temporary prestressed steel strands 14 are longitudinally and temporarily tensioned through first longitudinal notches 4 on the top plate and second longitudinal notches 5 on the upper side wall, the lower side wall and the bottom plate of the two adjacent ring lining rings.
Furthermore, prestressed threaded steel bars 10 penetrate into vertical prestressed tensioning holes 11 which are vertically corresponding to a top plate, an upper side wall and a bottom plate of the prefabricated lining upper block 1 and a prefabricated lining lower block 2 and a lower side wall of the prefabricated lining upper block 1, prestressed threaded steel bars 10 penetrate into vertical prestressed tensioning holes 11 which are vertically corresponding to a top plate, an upper partition plate and a prefabricated lining lower block 2 and an upper partition plate of the prefabricated lining upper block 1, and vertical permanent prestressed tensioning is carried out on the corresponding prestressed threaded steel bars 10 through a first vertical notch 7 on the top plate, a second vertical notch 8 on the lower side wall and a third vertical notch 9 on the lower partition plate.
The above description is only a preferred embodiment of the present invention, and should not be taken as limiting the invention, and any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (6)
1. The utility model provides a prefabricated lining prestressed connection structure of open cut tunnel of upper and lower piecemeal which characterized in that: the connecting structure is formed by longitudinally splicing multiple ring lining rings; the lining ring comprises a prefabricated lining upper block and a prefabricated lining lower block which are oppositely arranged up and down, the prefabricated lining upper block comprises a top plate and two upper side walls connected with two ends of the top plate, and the prefabricated lining lower block comprises a bottom plate and two lower side walls connected with two ends of the bottom plate; the roof go up the side wall down the side wall with all correspond in the bottom plate and be equipped with a plurality of vertical prestressing force stretch-draw holes that run through vertically, stretch-draw in the vertical prestressing force stretch-draw hole that corresponds vertically has same root prestressing force twisted steel, just it has the pea gravel concreten to press to annotate in the vertical prestressing force stretch-draw hole.
2. The upper and lower partitioned open-cut tunnel precast lining prestressed connection structure of claim 1, wherein: the top plate is also connected with an upper partition plate which is positioned between the two upper side walls; the bottom plate is also connected with a lower partition plate which is positioned between the two lower side walls; the top plate, the upper partition plate, the lower partition plate and the bottom plate are correspondingly provided with a plurality of vertically-penetrated vertical prestress tensioning holes.
3. The upper and lower partitioned open-cut tunnel precast lining prestressed connection structure as set forth in claim 2, wherein: the top surface of the top plate is provided with first vertical notches corresponding to the vertical prestress tensioning holes, the side surfaces of the lower side walls are provided with second vertical notches corresponding to the vertical prestress tensioning holes, and the side surfaces of the lower partition plate are provided with third vertical notches corresponding to the vertical prestress tensioning holes; the first vertical notch, the second vertical notch and the third vertical notch are communicated with the corresponding vertical prestress tensioning holes and are filled with fine aggregate concrete.
4. The upper and lower divided open-cut tunnel precast lining prestressed connection structure of any one of claims 1 to 3, wherein: longitudinal prestress tensioning holes which longitudinally penetrate are formed in the top plate, the upper side wall, the lower side wall and the bottom plate of each lining ring, the same permanent prestress steel strand is tensioned in the longitudinal prestress tensioning hole which longitudinally corresponds to each lining ring, and fine aggregate concrete is injected in the longitudinal prestress tensioning hole.
5. The upper and lower partitioned open-cut tunnel precast lining prestressed connection structure of claim 4, wherein: the top surface of the top plate of each lining ring is provided with a first longitudinal notch corresponding to the longitudinal prestress tensioning hole, and the upper side wall, the lower side wall and the bottom plate of each lining ring are provided with a second longitudinal notch corresponding to the longitudinal prestress tensioning hole; the first longitudinal notch and the second longitudinal notch are communicated with the corresponding longitudinal prestress tensioning holes and are filled with fine aggregate concrete.
6. The upper and lower partitioned open-cut tunnel precast lining prestressed connection structure of claim 1, wherein: and epoxy resin glue is brushed on the longitudinal abutted seam surface of the lining ring.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021913428.2U CN214301846U (en) | 2020-09-04 | 2020-09-04 | Upper and lower block-divided open-cut tunnel prefabricated lining prestress connecting structure |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202021913428.2U CN214301846U (en) | 2020-09-04 | 2020-09-04 | Upper and lower block-divided open-cut tunnel prefabricated lining prestress connecting structure |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112112194A (en) * | 2020-09-04 | 2020-12-22 | 中铁第四勘察设计院集团有限公司 | Upper and lower blocked open cut tunnel prefabricated lining prestress connecting structure and method |
| CN114517493A (en) * | 2022-03-25 | 2022-05-20 | 北京交通大学 | Full-prefabricated construction method for open-cut tunnel |
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2020
- 2020-09-04 CN CN202021913428.2U patent/CN214301846U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112112194A (en) * | 2020-09-04 | 2020-12-22 | 中铁第四勘察设计院集团有限公司 | Upper and lower blocked open cut tunnel prefabricated lining prestress connecting structure and method |
| CN114517493A (en) * | 2022-03-25 | 2022-05-20 | 北京交通大学 | Full-prefabricated construction method for open-cut tunnel |
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