CN109812279A - A kind of shock insulation section of jurisdiction for shield tunnel - Google Patents
A kind of shock insulation section of jurisdiction for shield tunnel Download PDFInfo
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- CN109812279A CN109812279A CN201910083447.2A CN201910083447A CN109812279A CN 109812279 A CN109812279 A CN 109812279A CN 201910083447 A CN201910083447 A CN 201910083447A CN 109812279 A CN109812279 A CN 109812279A
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- jurisdiction
- nitinol
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- cement
- isolation layer
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Abstract
The invention discloses a kind of shock insulation sections of jurisdiction for shield tunnel, including section of jurisdiction main body and the rubber vibration isolation layer for being fixed on section of jurisdiction connecting pin；The material of section of jurisdiction main body uses Nitinol cement-base composite material, i.e., the coarse aggregate in prior art concrete preparation process is replaced with suitable Nitinol fiber and be made, the concrete component and weight percent of Nitinol fiber are as follows: 55.9% nickel, 44.1% titanium；The volume ratio of the sum of above-mentioned each component is 1.8% in Nitinol fiber and Nitinol cement-base composite material；The material of rubber vibration isolation layer uses viscoelasticity high-damping rubber material；Rubber vibration isolation layer is fixed using gluing and nested structure with section of jurisdiction main body.The present invention obstructs seimic wave propagation using Nitinol cement base engineered composite material and rubber vibration isolation layer, guarantees that tunnel is comparatively safe under ground seismic wave function.Under the premise of not changing original construction method, the safety of structure can be improved, promote the ability that tunnel structure resists eaerthquake damage.
Description
Technical field
The present invention relates to Underground Construction fields, more particularly to a kind of shock insulation section of jurisdiction for shield tunnel.
Background technique
With the needs of national strategy, the propulsion of urbanization process, it is most important that urban subway tunnel has become metropolis
Rail traffic mode.Rare due to channel in high intensity Zone, to avoid it can not bad for circuit selectable in tunnel
Geology or tomography, geological process is more significant in the influence of the tunnel structure of these complex geological conditions to construction, and tunnel resists
Shake problem becomes the important problem that must be solved.Section of jurisdiction form currently used for constructing tunnel is more single.Technology maturation but lack
It is weary to antidetonation the considerations of.Shield duct piece is the main mounting structure of shield-tunneling construction, is the innermost layer barrier in tunnel, carries resistance
The effect of earth pressure, groundwater pressure and some special loads.So the improvement for shield duct piece is very necessary
's.
Summary of the invention
To solve the above problems, the present invention provides a kind of shock insulation sections of jurisdiction for shield tunnel.Use Nitinol water
Mud base engineered composite material, this section of jurisdiction have certain absorption to the propagation of seismic wave.It is substituted using this shock insulation section of jurisdiction
Original tradition section of jurisdiction, protection path structure can not be destroyed largely, ensure the safety and personal safety of tunnel structure.
In order to solve the above-mentioned technical problem, the present invention proposes a kind of shock insulation section of jurisdiction for shield tunnel, including section of jurisdiction master
Body and the rubber vibration isolation layer for being fixed on section of jurisdiction connecting pin；The material of the section of jurisdiction main body uses Nitinol cement base composite wood
Material, the component and mass fraction of the Nitinol cement-base composite material are as follows: 540~560 parts of cement, quartz sand 220~240
Part, 300~310 parts of water, 990~1020 parts of flyash, 2~3 parts of water-reducing agent；It further include having Nitinol fiber, the NiTi
The concrete component and weight percent of alloy fiber are as follows: 55.9% nickel, 44.1% titanium；The Nitinol fiber and the NiTi close
The volume ratio of the sum of above-mentioned each component is 1.8% in the cement-based composite material of Jinsui River；The material of the rubber vibration isolation layer is using glutinous bullet
Property high-damping rubber material；The rubber vibration isolation layer is fixed using gluing and nested structure with the section of jurisdiction main body.
The present invention is used for the shock insulation section of jurisdiction of shield tunnel, wherein the nested structure uses the connection of T-slot block, that is, exists
The side being connect in the section of jurisdiction main body with the rubber vibration isolation layer be equipped with T-slot, on the rubber vibration isolation layer with the pipe
The side of piece main body connection is equipped with the T-block cooperated with the T-slot.
In the present invention, in the Nitinol cement-base composite material, P.042.5 the cement selection label is not less than
Ordinary portland cement；The average grain diameter of the quartz sand is 110 μm, and maximum particle diameter is 300 μm；The flyash is first level flour
Coal ash；The length of the Nitinol fiber is about 3cm, and diameter is about 0.25mm；The water-reducing agent completes the high property of hydrochlorate using poly-
Energy water-reducing agent, alkali content is less than 10%, and water-reducing rate is greater than 25%, and normal pressure Qinshui rate ratio is less than 20%.
The invention has the following advantages:
Using the shock insulation section of jurisdiction of Nitinol cement-base composite material production in the present invention, can reduce between section of jurisdiction and section of jurisdiction
Relative displacement, the displacement response in tunnel when so as to mitigate geological process.Rubber vibration isolation layer in the present invention can be absorbed
The energy of seismic wave achievees the purpose that shock insulation to reduce influence of the earthquake to tunnel structure.Structure of the invention is reasonable, constructs
Simply, the damping that can effectively improve tunnel duct piece is taken precautions against natural calamities performance.
Detailed description of the invention
Fig. 1 is a kind of schematic diagram of the shock insulation section of jurisdiction for shield tunnel of the present invention
In figure: the main body of the section of jurisdiction 1-；2- nested structure；3- rubber vibration isolation layer.
Specific embodiment
In order to which objects and advantages of the present invention are more clearly understood, the present invention is carried out with reference to embodiments further
It is described in detail.It should be understood that the specific embodiments described herein are merely illustrative of the present invention, it is not used to limit this hair
It is bright.
Following further describes the present invention with reference to the drawings.
The bright mentality of designing in this hair shock insulation section of jurisdiction is: the material selection Nitinol and cement base engineering of section of jurisdiction main body are compound
Coarse aggregate in concrete preparation process is replaced with suitable Nitinol fiber and is made, using shock insulation section of jurisdiction to wave by material
The absorption of propagation, in liner structure section of jurisdiction construction in use shock insulation section of jurisdiction of the present invention, section of jurisdiction can be made to have certain
The ability for absorbing seismic wave, so that protection path structure is not destroyed.
As shown in Figure 1, a kind of shock insulation section of jurisdiction for shield tunnel proposed by the present invention, including section of jurisdiction main body 1 and fixation
The rubber vibration isolation layer 3 of surrounding in section of jurisdiction；The rubber vibration isolation layer 3 is fixed using gluing and nested structure 2 with the section of jurisdiction main body.
The rubber vibration isolation layer 3 is used to hinder the propagation of seismic wave, absorbs the energy of seismic wave, has both waterproof action.The nested knot
Structure 2 is for the ease of in four Plane Installations of section of jurisdiction main body 1 and fixed rubber vibration isolation layer 3.
The material of the section of jurisdiction main body 1 uses Nitinol cement-base composite material, and the Nitinol cement base is compound
The component and mass fraction of material are as follows: 540~560 parts of cement, 220~240 parts of quartz sand, 300~310 parts of water, flyash 990
~1020 parts, 2~3 parts of water-reducing agent；It further include having Nitinol fiber, the concrete component and weight hundred of the Nitinol fiber
It is divided into: 55.9% nickel, 44.1% titanium；Above-mentioned each group in the Nitinol fiber and the Nitinol cement-base composite material
The volume ratio of/sum is 1.8%.When it is implemented, the cement selection label therein is not less than ordinary silicon P.042.5
Acid salt cement；The average grain diameter of the quartz sand is 110 μm, and maximum particle diameter is 300 μm；The flyash is level-one flyash；
The concrete component and weight percent of the Nitinol fiber are as follows: 55.9% nickel, 44.1% titanium, the length of the Nitinol fiber
Degree is about 3cm, and diameter is about 0.25mm；The water-reducing agent completes hydrochlorate high-performance water reducing agent using poly-, and alkali content subtracts less than 10%
Water rate is greater than 25%, and normal pressure Qinshui rate ratio is less than 20%.
The material of the rubber vibration isolation layer 3 uses viscoelasticity high-damping rubber material,
The nested structure 2 is connected that is, in the section of jurisdiction main body 1 with the rubber vibration isolation layer 3 using the connection of T-slot block
The side connect is equipped with T-slot, and the side connecting on the rubber vibration isolation layer 3 with the section of jurisdiction main body 1 is equipped with and the T-slot
The T-block of cooperation.
Preparation of the present invention for the shock insulation section of jurisdiction of shield tunnel, mainly includes the following steps:
Nitinol cement base engineered composite material is prepared according to component provided by the invention and mass fraction, mainly will
Coarse aggregate in prior art concrete preparation process replaces with suitable Nitinol fiber and is made.
Recalculate section of jurisdiction template size, it is contemplated that the shape of nested structure 2 that is arranged in the present invention and as standard
Change the shape of template.In addition, the size of template will carry out certain reduction due to the introducing of rubber vibration isolation layer 3.
In the 2 part coating adhesive of Nitinol cement base engineered composite material section of jurisdiction nested structure of demoulding, install later
Viscoelasticity high-damping rubber material keeps finished size identical as standard pipe chip size.
The viscoelasticity high-damping rubber material that rubber vibration isolation layer uses in the present invention is to increase in natural rubber with carbon black
Made by additive for primary raw material.Suction-operated physically can occur with rubber molecule for carbon black, also can be with rubber point
Son generates chemical bonding, so that rubber is formed overall network structure, to physics such as the high resiliency of rubber, high rigidity and high intensity
Performance has biggish facilitation.
The material for preparing of section of jurisdiction is changed to Nitinol cement base engineered composite material from normal concrete by the present invention.It uses
The anti-seismic performance of the structure of material preparation can be substantially improved, and when an earthquake occurs, shock insulation section of jurisdiction of the present invention can with certain
Morphotropism and restorability have remarkable effect to barrier seismic wave.It can guarantee damaged condition of the tunnel under ground seismic wave function
It substantially reduces.
The above is only a preferred embodiment of the present invention, it should be noted that for the ordinary skill people of the art
For member, without departing from the principle of the present invention, it can also make several improvements and retouch, these improvements and modifications are also answered
It is considered as protection scope of the present invention.
Claims (3)
1. a kind of shock insulation section of jurisdiction for shield tunnel, it is characterised in that: including section of jurisdiction main body (1) and be fixed on section of jurisdiction connecting pin
Rubber vibration isolation layer (3)；
The material of the section of jurisdiction main body (1) uses Nitinol cement-base composite material, the Nitinol cement base composite wood
The component and mass fraction of material are as follows: 540~560 parts of cement, 220~240 parts of quartz sand, 300~310 parts of water, flyash 990~
1020 parts, 2~3 parts of water-reducing agent；It further include having Nitinol fiber, the concrete component and weight percent of the Nitinol fiber
Are as follows: 55.9% nickel, 44.1% titanium；Above-mentioned each component in the Nitinol fiber and the Nitinol cement-base composite material
The sum of volume ratio be 1.8%；
The material of the rubber vibration isolation layer (3) uses viscoelasticity high-damping rubber material；
The rubber vibration isolation layer (3) is fixed using gluing and nested structure (2) and the section of jurisdiction main body (1).
2. being used for the shock insulation section of jurisdiction of shield tunnel according to claim 1, which is characterized in that the nested structure (2) uses T
The connection of type groove block, i.e., the side connecting on the section of jurisdiction main body (1) with the rubber vibration isolation layer (3) is equipped with T-slot, in institute
It states the side connecting on rubber vibration isolation layer (3) with the section of jurisdiction main body (1) and is equipped with the T-block cooperated with the T-slot.
3. being used for the shock insulation section of jurisdiction of shield tunnel according to claim 1, it is characterised in that: the Nitinol cement base is multiple
In condensation material, the cement selection label is not less than ordinary portland cement P.042.5；The average grain diameter of the quartz sand is
110 μm, maximum particle diameter is 300 μm；The flyash is level-one flyash；The length of the Nitinol fiber is about 3cm, directly
Diameter is about 0.25mm；The water-reducing agent completes hydrochlorate high-performance water reducing agent using poly-, and less than 10%, water-reducing rate is greater than alkali content
25%, normal pressure Qinshui rate ratio is less than 20%.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910083447.2A CN109812279B (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 |
|---|---|---|---|
| CN201910083447.2A CN109812279B (en) | 2019-01-29 | 2019-01-29 | Shock insulation duct piece for shield tunnel |
Publications (2)
| Publication Number | Publication Date |
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| CN109812279A true CN109812279A (en) | 2019-05-28 |
| CN109812279B CN109812279B (en) | 2023-09-26 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201910083447.2A Active CN109812279B (en) | 2019-01-29 | 2019-01-29 | Shock insulation duct piece for shield tunnel |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113550762A (en) * | 2021-08-06 | 2021-10-26 | 东南大学 | Vibration reduction type shield segment joint structure and shield segment vibration reduction method |
| CN115368059A (en) * | 2022-09-20 | 2022-11-22 | 广州大学 | Tunnel synchronous grouting shock insulation material and application thereof |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113550762A (en) * | 2021-08-06 | 2021-10-26 | 东南大学 | Vibration reduction type shield segment joint structure and shield segment vibration reduction method |
| CN115368059A (en) * | 2022-09-20 | 2022-11-22 | 广州大学 | Tunnel synchronous grouting shock insulation material and application thereof |
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| Publication number | Publication date |
|---|---|
| CN109812279B (en) | 2023-09-26 |
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