CN209875165U - Shock insulation duct piece for shield tunnel - Google Patents
Shock insulation duct piece for shield tunnel Download PDFInfo
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- CN209875165U CN209875165U CN201920150510.5U CN201920150510U CN209875165U CN 209875165 U CN209875165 U CN 209875165U CN 201920150510 U CN201920150510 U CN 201920150510U CN 209875165 U CN209875165 U CN 209875165U
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- shock insulation
- insulation layer
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- segment
- rubber shock
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Abstract
The utility model discloses a shock insulation segment for shield tunnel, comprising a segment main body and a rubber shock insulation layer fixed at the segment connecting end; the material of the duct piece main body is a nickel-titanium alloy cement-based composite material, namely, coarse aggregate in the concrete preparation process in the prior art is replaced by a proper amount of nickel-titanium alloy fiber to prepare the duct piece main body, and the material of the rubber shock insulation layer is a viscoelastic high-damping rubber material; the rubber shock insulation layer is fixed with the duct piece main body by adopting an adhesive and nested structure. The utility model discloses utilize nickel titanium alloy cement base engineering combined material and rubber shock insulation layer to come the separation seismic wave to propagate, guarantee the tunnel relative safety under the seismic wave effect. On the premise of not changing the original construction method, the safety of the structure can be improved, and the capability of the tunnel structure for resisting earthquake damage is improved.
Description
Technical Field
The utility model relates to an underground structure construction field, concretely relates to shock insulation section of jurisdiction for shield tunnel.
Background
With the need of national strategy and the advance of urbanization process, urban subway tunnels become the most important rail transit mode of metropolis. In a high-intensity earthquake area, due to the scarcity of channels, the tunnel can not select lines so that the tunnel can not avoid poor geology or faults, the influence of earthquake action on the tunnel structure constructed under the complex geological conditions is more obvious, and the earthquake resistance problem of the tunnel becomes an important difficult problem which needs to be solved. The duct piece form used for tunnel construction is single at present. The technology is mature but there is a lack of consideration for earthquake resistance. The shield segment is a main assembly component for shield construction, is the innermost barrier of the tunnel and plays a role in resisting soil layer pressure, underground water pressure and some special loads. Therefore, improvements to shield segments are necessary.
SUMMERY OF THE UTILITY MODEL
In order to solve the problem, the utility model provides a shock insulation section of jurisdiction for shield tunnel. The nickel-titanium alloy cement-based engineering composite material is used, and the pipe piece has a certain absorption effect on the propagation of seismic waves. The shock insulation duct piece is used for replacing the original traditional duct piece, so that the tunnel structure can be protected from being damaged to a great extent, and the safety and the personal safety of the tunnel structure are guaranteed.
In order to solve the technical problem, the utility model provides a shock insulation duct piece for a shield tunnel, which comprises a duct piece main body and a rubber shock insulation layer fixed at the duct piece connecting end; the material of the segment main body is a nickel-titanium alloy cement-based composite material; the rubber shock insulation layer is made of a viscoelastic high-damping rubber material; the rubber shock insulation layer is fixed with the duct piece main body by adopting an adhesive and nested structure.
The utility model is used for the shock insulation section of jurisdiction of shield tunnel, wherein, nested structure adopts the connection of T type groove piece, is in promptly in the section of jurisdiction main part with one side that the rubber shock insulation layer is connected is equipped with T type groove on the rubber shock insulation layer with one side that the section of jurisdiction main part is connected be equipped with T type groove complex T type piece.
The utility model discloses following beneficial effect has:
the utility model discloses well shock insulation section of jurisdiction of adopting nickel titanium alloy cement base combined material to make can reduce the relative displacement between section of jurisdiction and the section of jurisdiction to the displacement reaction in tunnel when can alleviateing the earthquake effect. The utility model provides a rubber shock insulation layer can absorb the energy of earthquake wave to reduce the earthquake and to the influence of tunnel structure, reach the purpose of shock insulation. The utility model discloses rational in infrastructure, construction are simple, can effectively improve tunnel segment's shock attenuation disaster prevention performance.
Drawings
FIG. 1 is the utility model discloses a schematic diagram of shock insulation section of jurisdiction for shield tunnel
In the figure: 1-a segment body; 2-a nested structure; 3-rubber shock insulation layer.
Detailed Description
In order to make the objects and advantages of the present invention more apparent, the present invention will be described in further detail with reference to the following embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.
The present invention will be further described with reference to the accompanying drawings.
The design idea of the shock insulation segment is as follows: nickel titanium alloy and cement base engineering combined material are chooseed for use to the material of section of jurisdiction main part, and the coarse aggregate replacement in the concrete preparation process is made for proper amount nickel titanium alloy fibre, utilizes the absorption of shock insulation section of jurisdiction to the wave propagation, uses in the section of jurisdiction construction in the lining cutting structure the utility model discloses shock insulation section of jurisdiction enables the section of jurisdiction and possesses the ability of certain absorption seismic wave to the protection tunnel structure is not destroyed.
As shown in fig. 1, the utility model provides a shock insulation duct piece for shield tunnel, which comprises a duct piece main body 1 and a rubber shock insulation layer 3 fixed around the duct piece; the rubber shock insulation layer 3 is fixed with the duct piece main body by adopting an adhesive and nested structure 2. The rubber shock insulation layer 3 is used for blocking the transmission of seismic waves, absorbing the energy of the seismic waves and having a waterproof function. The nesting structure 2 is used for facilitating installation and fixation of the rubber shock insulation layers 3 on four planes of the pipe piece body 1.
The material of the segment main body 1 is a nickel-titanium alloy cement-based composite material, and the nickel-titanium alloy cement-based composite material comprises the following components in parts by weight: 540-560 parts of cement, 220-240 parts of quartz sand, 300-310 parts of water, 990-1020 parts of fly ash and 2-3 parts of a water reducing agent; the nickel-titanium alloy fiber comprises the following specific components in percentage by weight: 55.9% nickel, 44.1% titanium; the volume ratio of the nickel-titanium alloy fiber to the sum of the components in the nickel-titanium alloy cement-based composite material is 1.8%. In specific implementation, the cement is ordinary Portland cement with the grade not lower than P.042.5; the average grain size of the quartz sand is 110 mu m, and the maximum grain size is 300 mu m; the fly ash is first-grade fly ash; the nickel-titanium alloy fiber comprises the following specific components in percentage by weight: 55.9% nickel, 44.1% titanium, the nitinol fiber having a length of about 3cm and a diameter of about 0.25 mm; the water reducing agent is a poly-carboxylate high-performance water reducing agent, the alkali content is less than 10%, the water reducing rate is more than 25%, and the water penetration rate under normal pressure is less than 20%.
The rubber shock insulation layer 3 is made of viscoelastic high-damping rubber material,
the nested structure 2 adopts the connection of T type groove piece, promptly on the section of jurisdiction main part 1 with one side that rubber shock insulation layer 3 is connected is equipped with T type groove one side that rubber shock insulation layer 3 is last with section of jurisdiction main part 1 is connected is equipped with T type groove complex T type piece.
The utility model discloses a preparation of shock insulation section of jurisdiction for shield tunnel mainly includes following step:
according to the utility model provides a component and quality parts preparation nickel titanium alloy cement base engineering combined material mainly make with the coarse aggregate replacement in the prior art concrete preparation process for proper amount nickel titanium alloy fibre.
The segment form sizes are recalculated, taking into account the shape of the nesting 2 provided in the present invention and changing the form of the form on this basis. In addition, the size of the formwork is reduced to some extent due to the introduction of the rubber-vibration-isolating layer 3.
And (3) gluing an adhesive on the part of the demolded nickel-titanium alloy cement-based engineering composite material segment nested structure 2, and then installing a viscoelastic high-damping rubber material to ensure that the size of a finished product is the same as that of a standard segment.
The utility model discloses the high damping rubber material of glutinous elasticity that well rubber shock insulation layer adopted increases in natural rubber and uses the additive of carbon black as the main materials to make. The carbon black can be physically adsorbed with rubber molecules and chemically combined with the rubber molecules, so that the rubber forms an integral network structure, and the carbon black has a great promotion effect on the physical properties of high elasticity, high hardness, high strength and the like of the rubber.
The utility model changes the preparation material of the duct piece from common concrete into nickel-titanium alloy cement-based engineering composite material. The anti-seismic performance of the structure of using this material preparation can promote by a wide margin, when taking place the earthquake, the utility model discloses the shock insulation section of jurisdiction has certain deformability and recoverability, has apparent effect to separation seismic wave. The damage degree of the tunnel under the action of seismic waves can be greatly reduced.
The foregoing is only a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, a plurality of modifications and decorations can be made without departing from the principle of the present invention, and these modifications and decorations should also be regarded as the protection scope of the present invention.
Claims (2)
1. A shock insulation segment for a shield tunnel is characterized by comprising a segment main body (1) and a rubber shock insulation layer (3) fixed at the connecting end of the segment;
the pipe piece main body (1) is made of a nickel-titanium alloy cement-based composite material, and the rubber shock insulation layer (3) is made of a viscoelastic high-damping rubber material;
the rubber shock insulation layer (3) is fixed with the duct piece main body (1) by adopting an adhesive and nested structure (2).
2. The shock insulation segment for the shield tunnel according to claim 1, wherein the nesting structure (2) is connected by T-shaped groove blocks, namely a T-shaped groove is formed in one side of the segment main body (1) connected with the rubber shock insulation layer (3), and a T-shaped block matched with the T-shaped groove is formed in one side of the rubber shock insulation layer (3) connected with the segment main body (1).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920150510.5U CN209875165U (en) | 2019-01-29 | 2019-01-29 | Shock insulation duct piece for shield tunnel |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920150510.5U CN209875165U (en) | 2019-01-29 | 2019-01-29 | Shock insulation duct piece for shield tunnel |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN209875165U true CN209875165U (en) | 2019-12-31 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201920150510.5U Active CN209875165U (en) | 2019-01-29 | 2019-01-29 | Shock insulation duct piece for shield tunnel |
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| CN (1) | CN209875165U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111779502A (en) * | 2020-07-20 | 2020-10-16 | 中铁第四勘察设计院集团有限公司 | Tunnel shock insulation structure and construction process |
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2019
- 2019-01-29 CN CN201920150510.5U patent/CN209875165U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111779502A (en) * | 2020-07-20 | 2020-10-16 | 中铁第四勘察设计院集团有限公司 | Tunnel shock insulation structure and construction process |
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