CN216894418U - Tunnel shock insulation structure - Google Patents
Tunnel shock insulation structure Download PDFInfo
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- CN216894418U CN216894418U CN202220462035.7U CN202220462035U CN216894418U CN 216894418 U CN216894418 U CN 216894418U CN 202220462035 U CN202220462035 U CN 202220462035U CN 216894418 U CN216894418 U CN 216894418U
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Abstract
The utility model belongs to the technical field of seismic isolation and reduction, and particularly relates to a tunnel seismic isolation structure. The structure comprises an arch wall shock insulation structure and an inverted arch shock insulation structure, wherein the arch wall shock insulation structure comprises a primary supporting structure, a rubber shock insulation cushion layer fixed through expansion bolts, a waterproof layer and a secondary lining structure from inside to outside; the inverted arch shock insulation structure comprises a pre-support structure, a cement mortar leveling layer, a composite shock insulation cushion layer consisting of a polyurethane foam plate and a rubber shock insulation support, a water stopping layer and an inverted arch concrete layer from inside to outside. The tunnel shock insulation structure can effectively absorb seismic wave energy, avoids damage to the whole structure of the tunnel, and has the characteristics of simple structure, convenience and quickness in construction and relatively low manufacturing cost.
Description
Technical Field
The utility model belongs to the technical field of seismic isolation and reduction, and particularly relates to a tunnel seismic isolation structure.
Background
In the past, people generally feel that the anti-seismic performance of a tunnel structure is better, but the isolation technical effect in the tunnel structure is not ideal, and even greater potential safety hazards exist. Tunnel construction is generally a controlled project, once damage occurs, traffic jam can be caused until the whole line falls into a paralyzed state, rescue after disaster is not facilitated, and therefore the requirement on shock insulation design is very strong, and the safety importance is self-evident.
At present, a complete design theory aiming at tunnel shock insulation is not available, a complete set of effective measures are quite limited in reality, and the utility model with the patent number of CN202110830002.3 discloses a tunnel with high shock insulation performance and a manufacturing method thereof. The utility model can firstly achieve the effects of strengthening the strength and preliminarily damping on the outer lining structure, ensure the performance of the tunnel anti-seismic weak area, and then achieve the aims of integrally improving the strength and the anti-seismic performance of the tunnel and ensuring the safety of the tunnel anti-seismic weak area through the action of the damping layer. But the structure of the device has the problems of complex structure, difficult construction, limited seismic isolation and protection effect, high construction cost, poor economy and the like.
SUMMERY OF THE UTILITY MODEL
The utility model aims to provide a tunnel shock insulation structure which is simple in structure, convenient and fast to construct, long-acting and stable in shock insulation effect, low in construction cost and good in economic benefit.
In order to realize the purpose, the technical scheme adopted by the utility model is as follows:
a tunnel shock insulation structure which characterized in that: the anti-seismic structure comprises an arch wall shock insulation structure and an inverted arch shock insulation structure, wherein the arch wall shock insulation structure comprises a primary supporting structure, a rubber shock insulation cushion layer fixed through expansion bolts, a waterproof layer and a secondary lining structure from inside to outside; the inverted arch shock insulation structure comprises a preliminary support structure, a cement mortar leveling layer, a polyurethane foam plate and a composite shock insulation cushion layer consisting of rubber shock insulation supports, a water stopping layer and an inverted arch concrete layer from inside to outside.
The additional technical characteristics of the tunnel shock insulation structure further comprise that:
a plurality of parallel bosses are uniformly distributed on the cross section of the rubber shock insulation cushion layer along the width direction, and flat plate areas are arranged among the bosses;
the cross section of the boss on the surface of the rubber shock insulation cushion layer is in a trapezoid shape, a rectangular shape, a conical shape, a round shape or a combination of various shapes;
the rubber shock-insulation support seat consists of a rubber base body and one or more layers of stiffening steel plates arranged inside the rubber base body;
the composite shock insulation cushion layer comprises a polyurethane foam plate, a plurality of square frames are distributed on the surface of the polyurethane foam plate, the rubber shock insulation support is embedded in the square frames, and the height of the top surface of the rubber shock insulation support is not lower than the height of the surface of the polyurethane foam plate.
The utility model has the beneficial effects that: this structure can the effective absorption earthquake wave energy through the rubber shock insulation bed course of hunch wall shock insulation structure and the compound shock insulation bed course that comprises polyurethane foam board and rubber shock insulation support of inverted arch shock insulation structure, and the interval cushions earthquake diversified the assaults to avoid tunnel overall structure to take place to destroy, and compound simple structure, the operation is swift convenient, and construction cost is lower, economic benefits is outstanding.
Drawings
FIG. 1 is a schematic view of a tunnel seismic isolation structure according to the present invention;
FIG. 2 is a schematic structural view of a portion a of the arch wall seismic isolation structure shown in FIG. 1;
fig. 3 is a schematic structural view of a part b of the inverted arch seismic isolation structure in fig. 1.
Detailed Description
The tunnel seismic isolation structure and the working principle provided by the utility model are further described in detail with reference to the accompanying drawings.
Referring to fig. 1, a schematic diagram of a tunnel seismic isolation structure provided by the present invention is shown. The tunnel shock insulation structure comprises an arch wall shock insulation structure a and an inverted arch shock insulation structure b, wherein the arch wall shock insulation structure a comprises a primary supporting structure 1, a rubber shock insulation cushion layer 2 fixed through an expansion bolt 10, a waterproof layer 3 and a secondary lining structure 4 from inside to outside; the inverted arch shock insulation structure b comprises a preliminary support structure 5, a cement mortar leveling layer 6, a polyurethane foam plate 71 and a composite shock insulation cushion layer 7 consisting of a rubber shock insulation support 72, a water stopping layer 8 and an inverted arch concrete layer 9 from inside to outside.
The working principle is as follows: this tunnel shock insulation structure arch wall and inverted arch position have all set up shock insulation structure, it comprises rubber shock insulation cushion 2 or the compound shock insulation cushion 7 that comprises polyurethane foam board 71 and rubber shock insulation support 72, on the basis of original tunnel inner structure, through rubber buffering shock attenuation, the shock insulation ability of tunnel overall structure has been improved, shock insulation structure can effectual absorption earthquake wave energy, the influence of earthquake impact to the concrete has been reduced to the at utmost, and its shock insulation structure is simple, it is convenient to be under construction, the cost is relatively lower.
In constructing the above-described novel tunnel seismic isolation structure,
in order to enhance the capability of buffering and damping impact, a plurality of parallel bosses 21 are uniformly distributed on the cross section of the rubber shock-isolating cushion layer 2 along the width direction, and flat areas are formed among the bosses 21, so that an internal deformation structure is formed, and the vibration energy can be absorbed and slowed down;
further, the cross section of the boss 21 on the surface of the rubber shock-isolating cushion layer 2 is trapezoidal, rectangular, conical, circular or a combination of various shapes, and the rubber shock-isolating support 72 consists of a rubber matrix and one or more layers of stiffening steel plates arranged in the rubber matrix;
the rubber base bodies of the rubber seismic isolation cushion layer 2 and the rubber seismic isolation support 72 include, but are not limited to, natural rubber, chloroprene rubber, ethylene propylene diene monomer rubber, butadiene nitrile rubber, polyurethane rubber and a mixture of two or more of the same;
preferably, the composite vibration-isolating cushion layer 7 comprises a polyurethane foam plate 71 with a plurality of square frames 711 distributed on the surface, the rubber vibration-isolating support 72 is embedded in the square frames 711, and the height of the top surface of the rubber vibration-isolating support 72 is not lower than the height of the surface of the polyurethane foam plate 71;
wherein, the flatness of the cement mortar leveling layer 6 of the inverted arch shock insulation structure b is in accordance with the depth ratio between two protrusions of D/L1 (D: the depth of the concave part between two adjacent convex surfaces of the base surface of the cement mortar leveling layer 6; L: the distance between two adjacent convex surfaces of the base surface of the cement mortar leveling layer 6; L is not more than 1 m);
the length of a rubber shock insulation cushion layer 2 of the arch wall shock insulation structure a can be cut according to actual needs, a boss of the rubber shock insulation cushion layer 2 faces one side of the waterproof layer 3, the back surface of the rubber shock insulation cushion layer 2 is closely attached to a base surface of a primary supporting structure and is fixed with the primary supporting structure through expansion bolts 10, and the arrangement number and the spacing of the expansion bolts 10 can be adjusted along with construction experience;
in production, the rubber shock insulation support 72 is arranged at the bottom of the inverted arch and has the characteristic of non-maintainability, so that the ozone aging performance is improved by 1-2 times compared with that of a common bridge plate type rubber support;
moreover, the rubber shock-insulation support 72 is arranged at the bottom of the inverted arch, so that two performance requirements of constant compression permanent deformation and alkali resistance after being soaked in water are added to the rubber shock-insulation support in consideration of the risk of being soaked by accumulated water, and the performance of the rubber shock-insulation support is higher than that of a common bridge plate type rubber support;
preferably, the installation gaps between the rubber vibration isolation pads, between the rubber vibration isolation supports 72 and the polyurethane foam plate 71 and between the polyurethane foam plate 71 and the polyurethane foam plate 71 can be controlled to be 5-10 mm.
Claims (5)
1. A tunnel shock insulation structure is characterized in that: the anti-seismic structure comprises an arch wall shock insulation structure and an inverted arch shock insulation structure, wherein the arch wall shock insulation structure comprises a primary supporting structure, a rubber shock insulation cushion layer fixed through expansion bolts, a waterproof layer and a secondary lining structure from inside to outside; the inverted arch shock insulation structure comprises a preliminary support structure, a cement mortar leveling layer, a polyurethane foam plate and a composite shock insulation cushion layer consisting of rubber shock insulation supports, a water stopping layer and an inverted arch concrete layer from inside to outside.
2. A tunnel seismic isolation structure as claimed in claim 1, wherein: a plurality of parallel bosses are uniformly distributed on the cross section of the rubber shock insulation cushion layer along the width direction, and flat plate areas are arranged among the bosses.
3. A tunnel seismic isolation structure as claimed in claim 2, wherein: the cross section of the lug boss on the surface of the rubber shock insulation cushion layer is in a trapezoid shape, a rectangular shape, a conical shape, a circular shape or a combination of multiple shapes.
4. A tunnel seismic isolation structure as claimed in claim 1, wherein: the rubber shock insulation support is composed of a rubber base body and one or more layers of stiffening steel plates arranged in the rubber base body.
5. A tunnel seismic isolation structure as claimed in claim 1 or 4, wherein: the composite shock insulation cushion layer comprises a polyurethane foam plate, a plurality of square frames are distributed on the surface of the polyurethane foam plate, the rubber shock insulation support is embedded in the square frames, and the height of the top surface of the rubber shock insulation support is not lower than the height of the surface of the polyurethane foam plate.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202220462035.7U CN216894418U (en) | 2022-03-04 | 2022-03-04 | Tunnel shock insulation structure |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202220462035.7U CN216894418U (en) | 2022-03-04 | 2022-03-04 | Tunnel shock insulation structure |
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| CN216894418U true CN216894418U (en) | 2022-07-05 |
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| CN202220462035.7U Active CN216894418U (en) | 2022-03-04 | 2022-03-04 | Tunnel shock insulation structure |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114575877A (en) * | 2022-03-04 | 2022-06-03 | 中铁第一勘察设计院集团有限公司 | Construction method of tunnel shock insulation structure |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114575877A (en) * | 2022-03-04 | 2022-06-03 | 中铁第一勘察设计院集团有限公司 | Construction method of tunnel shock insulation structure |
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