CN212867561U - Tunnel combined type double-layer lining structure system under high internal water pressure working condition - Google Patents
Tunnel combined type double-layer lining structure system under high internal water pressure working condition Download PDFInfo
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- CN212867561U CN212867561U CN202021116070.0U CN202021116070U CN212867561U CN 212867561 U CN212867561 U CN 212867561U CN 202021116070 U CN202021116070 U CN 202021116070U CN 212867561 U CN212867561 U CN 212867561U
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Abstract
The utility model discloses a double-deck lining cutting structure system of tunnel combined type under water pressure operating mode in height, including prefabricated section of jurisdiction, two linings of reinforced concrete, the connector connecting reinforcement and the hand hole connecting reinforcement of interior arcwall face area recess. When the duct piece is prefabricated, a plurality of grooves are formed in the inner arc surface of the duct piece, and a plurality of uniformly distributed connecting sleeves are embedded; the duct piece bolt gasket is an elongated gasket and keeps a hand hole steel bar hole; the reinforced concrete two-lining is provided with double-layer circumferential reinforcing steel bars, longitudinal reinforcing steel bars, a pull hook rib, connector connecting reinforcing steel bars and hand hole connecting reinforcing steel bars, the double-layer circumferential reinforcing steel bars are distributed on the inner side and the outer side of the two-lining, the connector reinforcing steel bars are mechanically connected with the duct piece embedded sleeve, one end of each hand hole connecting reinforcing steel bar hooks the duct piece bolt gasket, and the other end of each hand hole connecting reinforcing steel bar hooks the two-lining longitudinal reinforcing steel bars. The composite double-layer lining structure system has the advantages of reliable stress, good integrity, good waterproof and anti-corrosion performance, strong durability, environmental protection and the like.
Description
Technical Field
The utility model belongs to the technical field of the tunnel construction, concretely relates to double-deck lining cutting structure system of tunnel combined type under high interior water pressure operating mode.
Background
The reinforced concrete segment is widely applied to the traffic field as a single-layer lining form, but in hydraulic tunnels, underpass rivers and other tunnels, particularly under the working condition of bearing high internal water pressure, the single-layer lining form faces the problems of water resistance, corrosion resistance, stress, durability and the like, and the double-layer lining form is increasingly widely applied.
In the design process of the double-layer lining, the common design thought comprises the following steps: (1) taking a secondary lining as a main body of a structure, and taking a primary lining as a temporary structure used in a certain specific period; (2) the primary lining bears external load, and the secondary lining bears internal load; (3) regarding secondary lining and primary lining as the major structure of tunnel together, the two atress in coordination, two kinds of design ideas are mostly the double-deck lining form of disconnect-type, and the third kind of design idea is the double-deck lining form of combined type. Compared with a separated double-layer lining structure form, the composite double-layer lining form has better economy and is more and more widely applied. However, how to effectively connect the double layers of lining to ensure common stress is a serious difficulty in design and construction.
Disclosure of Invention
In order to overcome the unable effective connection that realizes of double-deck lining cutting among the prior art, be difficult to guarantee technical defect such as common atress, the utility model provides a double-deck lining cutting structure system of tunnel combined type under high interior water pressure operating mode bears outside soil and water load by prefabricated section of jurisdiction in the construction stage, bears interior water pressure and outside soil and water load by section of jurisdiction and two linings jointly in the use stage, can effectively improve tunnel structure's wholeness, waterproof corrosion resistance and durability under the high interior water pressure operating mode, solved above-mentioned technical problem.
The utility model discloses a following technical scheme realizes above-mentioned purpose, a double-deck lining cutting structure system of tunnel combined type under high interior water pressure operating mode contains prefabricated section of jurisdiction, two linings of reinforced concrete, the connector connecting reinforcement and the hand hole connecting reinforcement of interior cambered surface area recess.
Before prefabricating a prefabricated section of jurisdiction, welding discontinuous decorative pattern steel plates on the inner arc surface of a mould, forming a plurality of grooves and a plurality of duct piece bolt holes after prefabrication is completed, wherein the hole areas of the grooves, the duct piece bolt holes and the hoisting holes account for not less than 40% of the area of the inner arc surface of the prefabricated section of jurisdiction, and connector connecting sleeves are uniformly arranged in a single prefabricated section of jurisdiction.
The reinforced concrete secondary lining is provided with an outer circumferential reinforcing steel bar, an inner circumferential reinforcing steel bar, a longitudinal reinforcing steel bar, a hook pulling bar, a connector connecting reinforcing steel bar and a hand hole connecting reinforcing steel bar. Outside hoop reinforcing bar and inboard hoop reinforcing bar arrange respectively in the outside and the inboard of two linings of reinforced concrete, and inboard hoop reinforcing bar mainly bears the pulling force that water pressure produced in the height, and outside hoop reinforcing bar mainly bears the pulling force that local outer water pressure produced, and inboard hoop reinforcing bar diameter is greater than outside hoop reinforcing bar.
One end of the connector connecting steel bar is provided with a thread and is connected with the connector connecting sleeve pre-embedded on the prefabricated pipe piece, and the other end of the connector connecting steel bar is provided with a hook which is hooked on the longitudinal steel bar of the reinforced concrete secondary lining.
The hand hole connecting steel bar adopts a two-end hook mode, one end of the hand hole connecting steel bar is hooked in the hand hole connecting steel bar preformed hole, and the other end of the hand hole connecting steel bar is hooked with the two lining longitudinal steel bars.
Foretell double-deck lining cutting structure system of tunnel combined type under water pressure operating mode in high, the interior arc welding decorative pattern steel sheet of prefabricated section of jurisdiction mould, steel sheet thickness are not less than 4mm, should avoid section of jurisdiction bolt hole, hole for hoist, alignment mark and pre-buried connector when arranging.
Foretell tunnel combined type double-deck lining cutting structural system under high interior water pressure operating mode, the gasket of prefabricated section of jurisdiction adopts elongated gasket bolt gasket, and it has bolt hole and hand hole connection reinforcing bar preformed hole to reserve on the elongated gasket bolt gasket.
Foretell under high interior water pressure operating mode double-deck lining cutting structure system of tunnel combined type, the diameter size in hand hole joint bar preformed hole is greater than the diameter of hand hole joint bar, and the interior cambered surface that the hole stretched out prefabricated section of jurisdiction is as the utility model discloses a further explain, two linings of reinforced concrete are provided with double-deck hoop reinforcing bar, longitudinal reinforcement, hook bar, connector connecting reinforcement and hand hole joint bar.
Generally, through the utility model discloses above technical scheme who conceives compares with prior art, can reach following beneficial effect: the utility model relates to a double-deck lining cutting structure system of tunnel combined type under water pressure operating mode in height bears outside water and soil load by prefabricated section of jurisdiction in the construction stage, bears interior water pressure and outside water and soil load by section of jurisdiction and two linings jointly in the use stage, can effectively improve wholeness, waterproof corrosion resistance and the durability of tunnel structure under the water pressure operating mode in the height, and the work progress need not carry out welding operation, avoids polluting the air in the tunnel.
Drawings
The following detailed description of embodiments of the present invention is provided with reference to the accompanying drawings, in which:
FIG. 1 is a schematic view of the overall structure of a tunnel composite double-layer lining structural system under a high internal water pressure condition;
FIG. 2 is a schematic view of the intrados of the prefabricated duct piece of the present invention;
FIG. 3 is a schematic view of the connection relationship between the hand hole connecting steel bar and the bolt gasket of the elongated segment;
in the figure: 1-prefabricated duct piece, 2-reinforced concrete secondary lining, 3-connector connecting sleeve, 4-duct piece bolt hole, 5-outside annular reinforcing steel bar, 6-inside annular reinforcing steel bar, 7-longitudinal reinforcing steel bar, 8-hook steel bar, 9-connector connecting reinforcing steel bar, 10-hand hole connecting reinforcing steel bar, 11-groove, 12-lengthened duct piece bolt gasket, 13-bolt hole and 14-hand hole connecting reinforcing steel bar preformed hole.
Detailed Description
As shown in fig. 1, the overall structure schematic diagram of the tunnel combined type double-layer lining structure system under the high internal water pressure working condition is shown, the prefabricated pipe piece 1 with a groove on the inner arc surface is contained, the reinforced concrete second lining 2, the connector connecting steel bar 9 and the hand hole connecting steel bar 10 are plugged, discontinuous pattern steel plates are welded on the inner arc surface of the mold before the prefabricated pipe piece 1 is prefabricated, a plurality of grooves 11 and pipe piece bolt holes 4 are formed after the prefabricated pipe piece 1 is completed, the groove 11, the hole areas of the pipe piece bolt holes 4 and hoisting holes account for the area of the inner arc surface of the prefabricated pipe piece 1 and are not less than 40%, the connector connecting sleeve 3 is uniformly arranged in a single prefabricated part of the prefabricated pipe piece 1, as shown in fig. 2.
The reinforced concrete secondary lining 2 is provided with an outer circumferential reinforcing steel bar 5, an inner circumferential reinforcing steel bar 6, a longitudinal reinforcing steel bar 7, a hook bar 8, a connector connecting reinforcing steel bar 9 and a hand hole connecting reinforcing steel bar 10, the outer circumferential reinforcing steel bar 5 and the inner circumferential reinforcing steel bar 6 are respectively arranged at the outer side and the inner side of the reinforced concrete secondary lining 2, the inner circumferential reinforcing steel bar 6 mainly bears the tensile force generated by high internal water pressure, the outer circumferential reinforcing steel bar 5 mainly bears the tensile force generated by local external water pressure, and the diameter of the inner circumferential reinforcing steel bar 6 is larger than that of the outer circumferential reinforcing steel; the connector connecting steel bar 9 one end is threaded, is connected with the connector connecting sleeve 3 pre-buried on the prefabricated section of jurisdiction 1, and the other end sets to the crotch, hooks on two vertical reinforcing bar 7 of lining 2 of reinforced concrete, and hand hole connecting steel bar 10 adopts both ends crotch form, and one end hook is at hand hole connecting steel bar preformed hole 14, and two lining vertical reinforcing bar 7 are hooked to the other end.
Prefabricated section of jurisdiction 1's gasket adopts and adds elongated gasket bolt gasket 12, adds and has bolt hole 13 and hand hole connection reinforcing bar preformed hole 14 on the elongated gasket bolt gasket 12 in advance, and the diameter size of hand hole connection reinforcing bar preformed hole 14 is greater than the diameter of hand hole connection reinforcing bar 10, and the interior cambered surface of prefabricated section of jurisdiction 1 is stretched out to the hole, as shown in fig. 3, for hand hole connection reinforcing bar 10 and the relation of connection sketch map that adds elongated section of jurisdiction bolt gasket 12.
The utility model discloses when using, mainly accomplish the construction of two linings of reinforced concrete 2 through following construction steps:
the method comprises the following steps: welding a pattern steel plate on the inner arc surface of a die of the prefabricated segment 1, wherein the thickness of the steel plate is not less than 4mm, the segment bolt holes 4, the hoisting holes, the alignment marks and the pre-embedded connectors are avoided during arrangement, the steel plate is arranged as many as possible under the discontinuous condition, and the area of holes such as the grooves 11, the segment bolt holes 4 and the hoisting holes accounts for not less than 40% of the area of the inner arc surface of the prefabricated segment 1;
step two: binding segment steel bars, reserving a connector connecting sleeve 3, arranging at least 6 segments for segment prefabrication construction;
step three: shield tunneling construction is carried out, prefabricated pipe pieces 1 are assembled, the prefabricated pipe pieces 1 are connected through bolts, and corresponding water stopping measures such as water stopping strips, water-swelling rubber pads and the like are arranged;
step four: the segment bolt gasket is an elongated galvanized gasket 12, a hand hole connecting steel bar preformed hole 14 is formed in the gasket, the diameter size of the hand hole connecting steel bar preformed hole 14 is larger than that of the hand hole connecting steel bar 10, and the hole extends out of the inner arc surface of the prefabricated segment 1;
step five: after the shield construction is finished, starting second lining construction after the prefabricated segment 1 is settled and stabilized;
step six: respectively installing two lining connector connecting steel bars 9, outer side circumferential steel bars 5, longitudinal steel bars 7, inner side circumferential steel bars 6, drag hook steel bars 8 and hand hole connecting steel bars 10;
step seven: and (5) carrying out reinforced concrete secondary lining 2 construction to finish the construction of the tunnel structure.
The utility model discloses bear outside water and soil load by prefabricated section of jurisdiction 1 at the construction stage, bear interior water pressure and outside water and soil load by prefabricated section of jurisdiction 1 and two linings of reinforced concrete 2 jointly in the use stage, can effectively improve wholeness, waterproof corrosion resistance and the durability of tunnel structure under the high interior water pressure operating mode, and the work progress need not carry out welding operation, avoids polluting the interior air of tunnel.
It will be understood by those skilled in the art that the foregoing is merely a preferred embodiment of the present invention, and is not intended to limit the invention, and that any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included within the scope of the present invention.
Claims (4)
1. A tunnel composite double-layer lining structural system under a high internal water pressure working condition is characterized by comprising prefabricated pipe pieces (1) with grooves on inner arc surfaces, reinforced concrete secondary linings (2), connector connecting steel bars (9) and hand hole connecting steel bars (10);
before the prefabricated pipe piece (1) is prefabricated, discontinuous pattern steel plates are welded on the inner arc surface of a mold, a plurality of grooves (11) and pipe piece bolt holes (4) are formed after the prefabricated pipe piece (1) is finished, the hole areas of the grooves (11), the pipe piece bolt holes (4) and hoisting holes account for not less than 40% of the area of the inner arc surface of the prefabricated pipe piece (1), and connector connecting sleeves (3) are uniformly arranged in a single prefabricated part of the prefabricated pipe piece (1);
the reinforced concrete secondary lining (2) is provided with an outer circumferential reinforcing steel bar (5), an inner circumferential reinforcing steel bar (6), a longitudinal reinforcing steel bar (7), a pull hook reinforcing steel bar (8), a connector connecting reinforcing steel bar (9) and a hand hole connecting reinforcing steel bar (10);
the outer side circumferential reinforcing steel bars (5) and the inner side circumferential reinforcing steel bars (6) are respectively arranged on the outer side and the inner side of the reinforced concrete secondary lining (2), the inner side circumferential reinforcing steel bars (6) mainly bear tension generated by high internal water pressure, the outer side circumferential reinforcing steel bars (5) mainly bear tension generated by local external water pressure, and the diameters of the inner side circumferential reinforcing steel bars (6) are larger than those of the outer side circumferential reinforcing steel bars (5);
one end of the connector connecting steel bar (9) is provided with a thread and is connected with a connector connecting sleeve (3) pre-embedded on the prefabricated pipe piece (1), and the other end of the connector connecting steel bar is provided with a hook which is hooked on a longitudinal steel bar (7) of the reinforced concrete secondary lining (2);
the hand hole connecting steel bar (10) adopts a hook form at two ends, one end of the hand hole connecting steel bar is hooked in the hand hole connecting steel bar preformed hole (14), and the other end of the hand hole connecting steel bar is hooked on the two lining longitudinal steel bars (7).
2. The tunnel composite double-layer lining structural system under the working condition of high internal water pressure as claimed in claim 1, wherein the inner arc-shaped welding pattern steel plate of the prefabricated segment (1) mold is not less than 4mm in thickness and is arranged to avoid segment bolt holes (4), hoisting holes, alignment marks and pre-buried connectors.
3. The tunnel composite double-layer lining structural system under the working condition of high internal water pressure as claimed in claim 1, wherein the gasket of the prefabricated pipe piece (1) is an elongated gasket bolt gasket (12), and a bolt hole (13) and a hand hole connecting steel bar preformed hole (14) are reserved on the elongated gasket bolt gasket (12).
4. The tunnel composite double-layer lining structural system under the working condition of high internal water pressure as claimed in claim 3, wherein the diameter size of the hand hole connecting steel bar preformed hole (14) is larger than that of the hand hole connecting steel bar (10), and the hole extends out of the inner arc surface of the prefabricated pipe piece (1).
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| Application Number | Priority Date | Filing Date | Title |
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| CN202021116070.0U CN212867561U (en) | 2020-06-16 | 2020-06-16 | Tunnel combined type double-layer lining structure system under high internal water pressure working condition |
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| CN202021116070.0U CN212867561U (en) | 2020-06-16 | 2020-06-16 | Tunnel combined type double-layer lining structure system under high internal water pressure working condition |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113914889A (en) * | 2021-09-01 | 2022-01-11 | 武汉市政工程设计研究院有限责任公司 | Superposed tunnel lining structure capable of bearing high internal and external water pressure and construction method |
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- 2020-06-16 CN CN202021116070.0U patent/CN212867561U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113914889A (en) * | 2021-09-01 | 2022-01-11 | 武汉市政工程设计研究院有限责任公司 | Superposed tunnel lining structure capable of bearing high internal and external water pressure and construction method |
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