CN209039956U - A kind of bridge gear protection structure of anti-rockfall - Google Patents
A kind of bridge gear protection structure of anti-rockfall Download PDFInfo
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- CN209039956U CN209039956U CN201821459492.0U CN201821459492U CN209039956U CN 209039956 U CN209039956 U CN 209039956U CN 201821459492 U CN201821459492 U CN 201821459492U CN 209039956 U CN209039956 U CN 209039956U
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- protection structure
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- rockfall
- gear
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Abstract
The utility model relates to a kind of bridges of anti-rockfall to keep off protection structure, and bridge is arranged above the bridge of bridge tunnel junction tunnel portal and keeps off protection structure, including standard paragraphs bridge gear protection structure and separate massif side bell mouth shape keep off protection structure；Standard paragraphs bridge keeps off protection structure and is made of symmetrical two longitudinal cambered surfaces, and longitudinal iso-cross-section, at top, middle line forms the crestal line of vertical equity；The end for keeping off protection structure from standard paragraphs bridge gear protection structure far from massif side bell mouth shape expands outward, is also made of symmetrical two longitudinal cambered surfaces, cross section is gradually expanded, and is formed at top and indulges tip-tilted crestal line.The utility model keeps off the design of protection structure by using the abnormity for complying with landform, reduce impact of the falling rocks to gear protection structure, improve the security performance of gear protection structure, bridge superstructure is damaged after preventing the landing of massif rockfall or avalanche, improve bridge and keep off protection structure stress, reduces operation maintenance workload.
Description
Technical field
The utility model belongs to the appurtenant work technical field of bridge structure construction safety, and in particular to a kind of anti-crag is fallen
The bridge of stone keeps off protection structure.
Background technique
With the development of national economy, mountain ridge road traffic increases, and the connected engineering structure of bridge tunnel gradually increases, mountain
Often there is the phenomenon that " two tunnels press from both sides a bridge " in engineering installation between ridge.Since landform is precipitous, stability of the hill is poor, during operation
The traffic of bridge and process is easy the impact by the rockfall to roll down from hillside.Impact force of falling stone is big, once it falls
Serious damage and injury usually are caused to bridge or traffic, bridge operation risk pressure is very big.At present in engineering frequently with
A kind of arch-shaped steel frame formation gear watch box skeleton is arranged in the position overhead that bridge can suffer from rockfall invasion, is arranged on steelframe and blocks
Cut and buffer the structural form of the steel wire of falling rocks.The safeguard structure of this steel member is light-weight, but there are costs higher, structure
Stress is big, the problem of the total life cycle of bridge repeatedly need to carry out maintenance coating, therefore how to optimize the gear shield for improving bridge
The stress of structure improves the security performance of gear protection structure, reduces project cost, reduces maintenance workload and seems very necessary.
Summary of the invention
The purpose of the utility model is to provide a kind of bridges of anti-rockfall to keep off protection structure, prevents massif rockfall sliding
Fall or avalanche after bridge superstructure is damaged, improve bridge keep off protection structure stress, improve safety, reduce cost, subtract
Few operation maintenance workload.
The technology employed by the present utility model is
A kind of bridge gear protection structure of anti-rockfall, it is characterised in that:
Bridge is set above the bridge of bridge tunnel junction tunnel portal and keeps off protection structure, including standard paragraphs bridge keeps off protection structure
Protection structure is kept off with far from massif side bell mouth shape；
Standard paragraphs bridge keeps off protection structure and is made of symmetrical two longitudinal cambered surfaces, longitudinal iso-cross-section, in top
The crestal line of line formation vertical equity；
The end for keeping off protection structure from standard paragraphs bridge gear protection structure far from massif side bell mouth shape expands outward, also by left and right
Symmetrical two longitudinal cambered surface compositions, cross section is gradually expanded, is formed at top and indulge tip-tilted crestal line.
The composition cambered surface that bridge keeps off protection structure is lattice shell structure.
Lattice shell structure is made of the bar shaped floor to intersect vertically in length and breadth.
Hard polyurethane foam is provided between the floor of lattice shell structure.
Bar shaped floor is reinforced concrete structure.
The utility model has the advantage that
The utility model reduces falling rocks to gear protection structure by using the design for the abnormity gear protection structure for complying with landform
Impact improves the security performance of gear protection structure；The design of standard paragraphs is higher by far from massif side horn mouth by gear protection structure, no
It is only capable of more to prevent falling rocks from falling on track along route impact of collision, further improving mountain falling rocks from two sides diversion bridge
The security performance of section driving；By using the armored concrete of fin-plate type as gear protection structure, project cost is reduced；Floor
Between the hard polyurethane foam that is arranged can buffer the percussion implemented to gear protection structure main body, and hard polyurethane foam weight
Gently, cheap, it is conveniently replaced after damage.
Detailed description of the invention
Fig. 1 is that bridge keeps off protection structure elevation.
Fig. 2 is that bridge keeps off protection structure cross-sectional view.
In figure, 1- massif, the tunnel 2-, the nearly massif side bridge of 3- keeps off protection structure, and 4- standard paragraphs bridge keeps off protection structure, and 5- is separate
Massif side bell mouth shape keeps off protection structure, 6- bridge structure, 7- lattice shell structure, 8- hard polyurethane foam.
Specific embodiment
The utility model is described in detail With reference to embodiment.
The utility model relates to a kind of bridges of anti-rockfall to keep off protection structure, in the bridge of bridge tunnel junction tunnel portal
Top is arranged bridge and keeps off protection structure, including standard paragraphs bridge gear protection structure 4 and separate massif side bell mouth shape keep off protection structure 5.Mark
Quasi- section bridge gear protection structure 4 is made of symmetrical two longitudinal cambered surfaces, and longitudinal iso-cross-section, at top, middle line forms longitudinal direction
Horizontal crestal line.The end for keeping off protection structure 5 from standard paragraphs bridge gear protection structure 4 far from massif side bell mouth shape expands outward,
It is made of symmetrical two longitudinal cambered surfaces, cross section is gradually expanded, and is formed at top and indulges tip-tilted crestal line.
The composition cambered surface that bridge keeps off protection structure is lattice shell structure, and lattice shell structure by intersecting vertically in length and breadth
Bar shaped floor composition, bar shaped floor is reinforced concrete structure, is provided with hard polyurethane foam 8 between floor.
The gear protection structure of the anti-rockfall in bridge top is designed to that one kind is complied with landform and can be reduced and fallen by the utility model
Impact of the stone to gear protection structure, and can be quickly by the abnormity gear protection structure of falling rocks diversion bridge.It keeps off protection structure and uses fin-plate type steel
Reinforced concrete shell structure, armored concrete rib are put more energy into, armored concrete rib evagination, peace among the region formed between rib
The buffering energy-consumptions materials such as the hard polyurethane foam of lightweight are filled, the percussion implemented to gear protection structure main body can be buffered.
The content of the utility model is not limited to cited by embodiment, and those of ordinary skill in the art are practical new by reading this
Type specification and to any equivalent transformation that technical solutions of the utility model are taken, be the claim institute of the utility model
Cover.
Claims (5)
1. a kind of bridge of anti-rockfall keeps off protection structure, it is characterised in that:
Bridge is set above the bridge of bridge tunnel junction tunnel portal and keeps off protection structure, including standard paragraphs bridge gear protection structure (4)
Protection structure (5) are kept off with far from massif side bell mouth shape；
Standard paragraphs bridge keeps off protection structure (4) and is made of symmetrical two longitudinal cambered surfaces, longitudinal iso-cross-section, in top middle line
Form the crestal line of vertical equity；
End far from massif side bell mouth shape gear protection structure (5) from standard paragraphs bridge gear protection structure (4) expands outward, also by a left side
Right symmetrical two longitudinal cambered surface compositions, cross section is gradually expanded, is formed at top and indulge tip-tilted crestal line.
2. a kind of bridge of anti-rockfall according to claim 1 keeps off protection structure, it is characterised in that:
The composition cambered surface that bridge keeps off protection structure is lattice shell structure.
3. a kind of bridge of anti-rockfall according to claim 2 keeps off protection structure, it is characterised in that:
Lattice shell structure is made of the bar shaped floor to intersect vertically in length and breadth.
4. a kind of bridge of anti-rockfall according to claim 3 keeps off protection structure, it is characterised in that:
Hard polyurethane foam (8) are provided between the floor of lattice shell structure.
5. a kind of bridge of anti-rockfall according to claim 3 keeps off protection structure, it is characterised in that:
Bar shaped floor is reinforced concrete structure.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821459492.0U CN209039956U (en) | 2018-09-07 | 2018-09-07 | A kind of bridge gear protection structure of anti-rockfall |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821459492.0U CN209039956U (en) | 2018-09-07 | 2018-09-07 | A kind of bridge gear protection structure of anti-rockfall |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN209039956U true CN209039956U (en) | 2019-06-28 |
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ID=67032572
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201821459492.0U Active CN209039956U (en) | 2018-09-07 | 2018-09-07 | A kind of bridge gear protection structure of anti-rockfall |
Country Status (1)
| Country | Link |
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| CN (1) | CN209039956U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111101968A (en) * | 2019-12-29 | 2020-05-05 | 中铁二院工程集团有限责任公司 | Large karst cavity tunnel large deformation frame rock fall prevention structure and construction method |
-
2018
- 2018-09-07 CN CN201821459492.0U patent/CN209039956U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111101968A (en) * | 2019-12-29 | 2020-05-05 | 中铁二院工程集团有限责任公司 | Large karst cavity tunnel large deformation frame rock fall prevention structure and construction method |
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