CN107085006A - Tunnel roof fire resistance test device and method of testing - Google Patents
Tunnel roof fire resistance test device and method of testing Download PDFInfo
- Publication number
- CN107085006A CN107085006A CN201710384762.XA CN201710384762A CN107085006A CN 107085006 A CN107085006 A CN 107085006A CN 201710384762 A CN201710384762 A CN 201710384762A CN 107085006 A CN107085006 A CN 107085006A
- Authority
- CN
- China
- Prior art keywords
- component
- bearing
- fire
- tunnel
- fire resistance
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
- 238000012360 testing method Methods 0.000 title claims abstract description 23
- 238000010998 test method Methods 0.000 title claims abstract description 9
- 239000011449 brick Substances 0.000 claims abstract description 24
- 238000007789 sealing Methods 0.000 claims abstract description 22
- 238000004088 simulation Methods 0.000 claims abstract description 4
- 230000003014 reinforcing effect Effects 0.000 claims description 11
- 239000000020 Nitrocellulose Substances 0.000 claims description 10
- 229920001220 nitrocellulos Polymers 0.000 claims description 10
- 239000004927 clay Substances 0.000 claims description 8
- 238000004519 manufacturing process Methods 0.000 claims description 6
- 238000002474 experimental method Methods 0.000 claims description 3
- 239000004570 mortar (masonry) Substances 0.000 claims description 3
- 238000013461 design Methods 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 3
- 238000000034 method Methods 0.000 description 3
- 239000011150 reinforced concrete Substances 0.000 description 3
- 239000004567 concrete Substances 0.000 description 2
- 238000010276 construction Methods 0.000 description 2
- 238000011161 development Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 230000005484 gravity Effects 0.000 description 2
- 238000007689 inspection Methods 0.000 description 2
- 230000002787 reinforcement Effects 0.000 description 2
- 238000011160 research Methods 0.000 description 2
- 238000004364 calculation method Methods 0.000 description 1
- 238000002485 combustion reaction Methods 0.000 description 1
- 230000006378 damage Effects 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 238000010304 firing Methods 0.000 description 1
- 239000012634 fragment Substances 0.000 description 1
- 239000000446 fuel Substances 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 230000002265 prevention Effects 0.000 description 1
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N25/00—Investigating or analyzing materials by the use of thermal means
Landscapes
- Physics & Mathematics (AREA)
- Health & Medical Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Chemical & Material Sciences (AREA)
- Analytical Chemistry (AREA)
- Biochemistry (AREA)
- General Health & Medical Sciences (AREA)
- General Physics & Mathematics (AREA)
- Immunology (AREA)
- Pathology (AREA)
- Building Environments (AREA)
Abstract
Tunnel roof fire resistance test device, includes fire stove, some bearings, the component and sealing structure for simulation tunnel top plate of a upper shed；The fire stove, component and sealing device surround to form a sealed burner hearth；The bearing is erected in inside the burner hearth, has identical height with the furnace wall of the fire stove；The component is placed on the bearing；The sealing structure includes 4 bells being staggeredly placed and at least refractory brick for sealing the space between the bell and fire stove, utilize the tunnel roof fire resistance method of testing of the device, load and unload component easy to operate, alleviate the labor intensity of experimenter.
Description
Technical field
The present invention relates to tunnel roof fire resistance test device and method of testing.
Background technology
With economic fast development and the continuous progress of society, using subway and underground transportation junction as the traffic tunnel of representative
Road is increasing, and reinforced concrete building structure has because of its normal temperature strength height, from heavy and light, manufacture is easy, speed of application is fast, plasticity and toughness
Good the features such as, it is widely adopted in highway in China tunnel construction.But fire thing is also swept along in the fast development of Tunnel Engineering
Therefore take place frequently, reinforced concrete building structure generally not fire resisting, when the reinforcing bar bearing temperature in concrete reaches 250 DEG C under intensity
Drop quickly, intensity decreases about 50% when reaching 350 DEG C of being heated, intensity declines more than 80% at 500 DEG C.Thus make in high temperature of fire
Under, reinforced concrete construction collapses dangerous increase severely.Tunnel fire resistance is carried out for this domestic and foreign scholars input great effort
Can research.
Because the fiery face of the back of the body in tunnel is massif, it is impossible to which temperature thermocouple is inserted into inside concrete bar-mat reinforcement from the back of the body fiery face
Fire resistance test is difficult to behind place, therefore tunnel completion.The most effective method of tunnel structure fire resistance is studied at present
It is local full size fire test, currently conventional is that, by fire, this method is simple and convenient but is more suitable for side by the edge-on one side of component
Wall is not enough to top plate applicability by fire.Therefore, it is research tunnel roof fire-resistance property, reduction fire prevention investment, is also calamity after being
Rescue provides possible afterwards, it is intended to invents a kind of top plate fire resistance test device, it is more met tunnel roof by condition of a fire shape
Be heated evenly, save fuel, it is easy to operate.
The content of the invention
It is an object of the invention to overcome the deficiencies in the prior art part, there is provided tunnel roof fire resistance test device
And method of testing, solve in above-mentioned background technology and the problems such as applicability is not enough is tested to tunnel roof fire resistance.
The technical solution adopted for the present invention to solve the technical problems is：Test and fill there is provided tunnel roof fire resistance
Put, include fire stove, some bearings, the component and sealing structure for simulation tunnel top plate of a upper shed；The fire stove,
Component and sealing device surround to form a sealed burner hearth；
The bearing is erected in inside the burner hearth, has identical height with the furnace wall of the fire stove；
The component is placed on the bearing；
The sealing structure includes 4 bells being staggeredly placed and for sealing the space between the bell and fire stove
An at least refractory brick.
In a preferred embodiment of the present invention, the tunnel roof fire resistance test device is also paperwrapped in including anti-guncotton
By the outside wall surface of the bearing of clay brick masonry.
In a preferred embodiment of the present invention, the top and/or inside of the bearing are also equipped with reinforcing bar.
In a preferred embodiment of the present invention, the bearing quantity is 4, and array placed in the middle is arranged in inside burner hearth.
In a preferred embodiment of the present invention, the component is formed based on prototype tunnel structure fabrication, and its bottom surface is rectangle,
With four smooth sides, the size configurations in component thickness direction are identical with prototype tunnel.
Present invention also offers the method for testing of tunnel roof fire resistance test device, comprise the following steps：
1) component is made：The component, is formed based on prototype tunnel structure fabrication, and its bottom surface is rectangle, flat with four
Whole side, the size configurations of thickness direction are identical with prototype tunnel；
2) bearing is made：Support position is specified, is calculated according to the component and is met stress and cut by the bearing of fiery demand
Face size, by clay brick masonry, when building the bearing to layer brick second from the bottom by laying bricks or stones, buries reinforcing bar in mixing mortar, continues to spread
If clay brick, reinforcing bar is placed in the holder top, the reinforcing bar of the bearing and holder top is wrapped up with anti-guncotton；
3) set up component and seal：The component is inserted into above the bearing, is respectively erected in 4 pieces of bells described
At the top of the furnace wall of fire stove, the edge of the bell and the mutual contact of the component seal the bell and fire with refractory brick
Space between the furnace wall of stove；
4) send instruction using fire furnace control system and start experiment, carry out data acquisition.
In a preferred embodiment of the present invention, step 3) also include：Inner sealing is checked：Set up last block bell
Before, carry out burner hearth interior fire protection and sealing property inspection.
In a preferred embodiment of the present invention, step 3) also include：Outside leak check：Check device Integral sealing
Property, with anti-guncotton pay the seam.
The technical program is compared with background technology, and it has the following advantages that：
1. chamber structure, susceptor design are rationally, the hole very little of last banking stage closure, it can send someone to enter before banking
In stove, from the seal of internal check experimental rig, preferable obturation effect can be accomplished, it is ensured that before sample effective heating surface product
The firing rate greatly reduced in experimentation is put, the energy is saved, reduces experimental cost；
2. the vortex flow area of burner hearth cross section in combustion process is reduced by hot mode using bottom one side, it is ensured that burner hearth is horizontal
It is more uniform and stable to temperature；
3. experimental rig makes simple, handling component is easy to operate, alleviates the labor intensity of experimenter；
4. temperature change in fire stove is by computer control, data acquisition and Phenomena Observation all show as the feature of plate,
Data acquisition is automatically performed by computer, and test accuracy and efficiency are higher.
Brief description of the drawings
Fig. 1 depicts the profile of tunnel roof fire resistance test device of the present invention；
Fig. 2 depicts the bearing distribution array figure of tunnel roof fire resistance test device of the present invention；
Fig. 3 depicts the sealed structural representation of tunnel roof fire resistance test device of the present invention.
Embodiment
Present disclosure is illustrated with reference to embodiment and accompanying drawing：
Refer to the fire stove 1 of Fig. 1-3, tunnel roof fire resistance test device, including a upper shed, some bearings 3,
Component 5 and sealing structure for simulation tunnel top plate；The fire stove 1, component 5 and sealing device surround that to form one sealed
Burner hearth 12；
The bearing 3 is erected in inside the burner hearth 12, has identical height with the furnace wall 14 of the fire stove 1；
The component 5 is placed on the bearing 3；
The sealing structure includes 4 bells 72 being staggeredly placed and for sealing between the bell 72 and fire stove 1
An at least refractory brick 74 in space.
In the present embodiment, the quantity of bearing 3 is 4, and array placed in the middle is arranged in inside burner hearth 12.The top of the bearing 3
Portion and/or it is internal be also equipped with reinforcing bar 32, the tunnel roof fire resistance test device also including anti-guncotton 76 be paperwrapped in by
The outside wall surface of the bearing 3 of clay brick masonry.
To simulate prototype tunnel structure as far as possible, component 5 described in the present embodiment is formed based on prototype tunnel structure fabrication, its
Bottom surface is rectangle, with four smooth sides, the size configurations of the thickness direction of component 5 side identical with prototype tunnel, smooth
Face is conducive to and the mutual contact of the bell 72, the gap of reduction to each other.
Comprised the following steps using the tunnel roof fire resistance method of testing of the present embodiment device：
1) component 5 is made：The component 5, is formed based on prototype tunnel structure fabrication, and the length and width in its section are respectively less than fire
The plane of stove 1, its bottom surface is rectangle, and with four smooth sides, the size configurations of thickness direction are identical with prototype tunnel；
2) bearing 3 is made：The position of bearing 3 is specified, the effect of bearing 3 is to prop component 5, so its bearing capacity must be big
In the gravity of component 5.If the sectional dimension of bearing 3 is designed to too small, it is difficult to while meeting the requirement of stable bearing carrier 5；If
The sectional dimension design of bearing 3 is too much, and the fire area of component 5 can be reduced again, is unfavorable for temperature and is transmitted in component 5.Institute
Need to go out the planar dimension of each bearing 3 by bearing capacity calculation when making bearing 3, be determined further according to the size obtained by calculating
Every layer of use revolution mesh and fragment of brick pose pattern, so as to design while meeting stress and the size by two requirements of fire.
Bearing 3 is by clay brick masonry, to enable the gravity of component 5 fully to pass to bearing 3, is building the bearing 3 by laying bricks or stones
During to layer brick second from the bottom, φ 83 × 3 bar-mat reinforcements are buried in mixing mortar.Continue to lay clay brick, to make the bottom of component 5
5 bar dowels 32 of φ 12 can be placed in the top uniform parallel of bearing 3 by fire.Build completion rear support 3 and the height phase of furnace wall 14 by laying bricks or stones
Together, the upper surface of four bearings 3 should be at same level, surfacing.
Because bearing 3 is wholy set in fire stove 1, need comprehensively by fire, to reduce destruction of the high temperature to bearing 3, so its
Periphery need to take safeguard measure, i.e., the reinforcing bar 32 at the bearing 3 and the top of bearing 3 is wrapped up with anti-guncotton 76.
3) set up component 5 and seal：The component 5 is inserted into the top of bearing 3, first two pieces of bells 72 are erected at
On the furnace wall 14 of the fire stove 1, the left and right sides of component 5 tightly described in contact；Left in the top of furnace wall 14 thick with bell 72
Identical space is spent, is built a wall to the upper surface of bell 72 and maintained an equal level here with refractory brick 74, block the space；Another pair is set up again
The other both sides of 72 contact component of bell 5, after the 3rd bell 72 is lifted in place, send someone to enter in stove in progress from the hole on opposite
The laying state of anti-guncotton 76 inside portion's leak check, inspection, to that may occur to block in time at leakage fire.Then carry out outside
Leak check, remaining gap is clogged with anti-guncotton 76, finally after ensuring that internal seal can reach requirement, using last
One piece of bell 72 seals whole device.
4) send instruction using the control system of fire stove 1 and start experiment, carry out data acquisition.
The foregoing is only a preferred embodiment of the present invention, but protection scope of the present invention be not limited thereto,
Any one skilled in the art the invention discloses technical scope in, the change or replacement that can be readily occurred in,
It should all be included within the scope of the present invention.Therefore, protection scope of the present invention should be with scope of the claims
It is defined.
Claims (8)
1. tunnel roof fire resistance test device, it is characterised in that：Fire stove, some bearings including a upper shed, it is used for
The component and sealing structure of simulation tunnel top plate；The fire stove, component and sealing device surround to form a sealed burner hearth；
The bearing is erected in inside the burner hearth, has identical height with the furnace wall of the fire stove；
The component is placed on the bearing；
The sealing structure includes 4 bells being staggeredly placed and for sealing the space between the bell and fire stove at least
One refractory brick.
2. tunnel roof fire resistance test device according to claim 1, it is characterised in that：Also include anti-guncotton to wrap
In the outside wall surface of the bearing by clay brick masonry.
3. tunnel roof fire resistance test device according to claim 2, it is characterised in that：The top of the bearing
And/or inside is also equipped with reinforcing bar.
4. tunnel roof fire resistance test device according to claim 1, it is characterised in that：The bearing quantity is 4,
Array placed in the middle is arranged in inside burner hearth.
5. tunnel roof fire resistance test device according to claim 1, it is characterised in that：The component is based on prototype
Tunnel structure is made, and its bottom surface is rectangle, with four smooth sides, the size configurations and prototype in component thickness direction
Tunnel is identical.
6. utilize the tunnel roof fire resistance method of testing of claim 1 described device, it is characterised in that comprise the following steps：
1) component is made：The component, is formed based on prototype tunnel structure fabrication, and its bottom surface is rectangle, smooth with four
Sideways, the size configurations of thickness direction are identical with prototype tunnel；
2) bearing is made：Support position is specified, is calculated according to the component and meets stress and the bearing section chi by fiery demand
It is very little, by clay brick masonry, when building the bearing to layer brick second from the bottom by laying bricks or stones, reinforcing bar is buried in mixing mortar, continues laying glutinous
Cob brick, reinforcing bar is placed in the holder top, and the reinforcing bar of the bearing and holder top is wrapped up with anti-guncotton；
3) set up component and seal：The component is inserted into above the bearing, the fire is respectively erected in 4 pieces of bells
At the top of the furnace wall of stove, the edge of the bell and the mutual contact of the component seal the bell and fire stove with refractory brick
Space between furnace wall；
4) send instruction using fire furnace control system and start experiment, carry out data acquisition.
7. tunnel roof fire resistance method of testing according to claim 6, it is characterised in that：
Step 3) also include：Inner sealing is checked：Set up before last block bell, carry out burner hearth interior fire protection and sealing property
Check.
8. tunnel roof fire resistance method of testing according to claim 6, it is characterised in that：
Step 3) also include：Outside leak check：Check device Integral sealing, with anti-guncotton pay the seam.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710384762.XA CN107085006A (en) | 2017-05-26 | 2017-05-26 | Tunnel roof fire resistance test device and method of testing |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710384762.XA CN107085006A (en) | 2017-05-26 | 2017-05-26 | Tunnel roof fire resistance test device and method of testing |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN107085006A true CN107085006A (en) | 2017-08-22 |
Family
ID=59608903
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201710384762.XA Pending CN107085006A (en) | 2017-05-26 | 2017-05-26 | Tunnel roof fire resistance test device and method of testing |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN107085006A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109709148A (en) * | 2018-12-25 | 2019-05-03 | 哈尔滨工业大学 | Removable support and construction method for the test of reinforced beam three-face fire |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101285330A (en) * | 2008-05-23 | 2008-10-15 | 上海德滨机械设备科技有限公司 | Environment protection type structure thermal insulation concrete block, masonry and method for anti-knock domestic architecture |
| CN101477109A (en) * | 2009-01-24 | 2009-07-08 | 哈尔滨工业大学 | Column support full-size steel reinforced concrete two-way slab fire-resistant tester and its implementing method |
| CN101846453A (en) * | 2010-05-13 | 2010-09-29 | 辽宁同辉科技发展有限公司 | Furnace for testing limit of fire resistance of tunnel fire-proof protective material |
| CN102590214A (en) * | 2012-02-17 | 2012-07-18 | 辽宁万泓激光科技股份有限公司 | Online nondestructive testing system for fire endurance of tunnel fireproof protection material |
| CN105316461A (en) * | 2014-06-25 | 2016-02-10 | 高俊杰 | Energy-saving heating furnace |
| RU2615048C1 (en) * | 2015-11-02 | 2017-04-03 | федеральное государственное бюджетное образовательное учреждение высшего образования "Самарский государственный технический университет" | Evaluation method for fire-resistance of reinforced concrete girder structure of building |
| CN207036738U (en) * | 2017-05-26 | 2018-02-23 | 华侨大学 | A kind of tunnel roof fire resistance test device |
-
2017
- 2017-05-26 CN CN201710384762.XA patent/CN107085006A/en active Pending
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101285330A (en) * | 2008-05-23 | 2008-10-15 | 上海德滨机械设备科技有限公司 | Environment protection type structure thermal insulation concrete block, masonry and method for anti-knock domestic architecture |
| CN101477109A (en) * | 2009-01-24 | 2009-07-08 | 哈尔滨工业大学 | Column support full-size steel reinforced concrete two-way slab fire-resistant tester and its implementing method |
| CN101846453A (en) * | 2010-05-13 | 2010-09-29 | 辽宁同辉科技发展有限公司 | Furnace for testing limit of fire resistance of tunnel fire-proof protective material |
| CN102590214A (en) * | 2012-02-17 | 2012-07-18 | 辽宁万泓激光科技股份有限公司 | Online nondestructive testing system for fire endurance of tunnel fireproof protection material |
| CN105316461A (en) * | 2014-06-25 | 2016-02-10 | 高俊杰 | Energy-saving heating furnace |
| RU2615048C1 (en) * | 2015-11-02 | 2017-04-03 | федеральное государственное бюджетное образовательное учреждение высшего образования "Самарский государственный технический университет" | Evaluation method for fire-resistance of reinforced concrete girder structure of building |
| CN207036738U (en) * | 2017-05-26 | 2018-02-23 | 华侨大学 | A kind of tunnel roof fire resistance test device |
Non-Patent Citations (2)
| Title |
|---|
| 徐明等: "水平模拟火灾试验炉的研制", 《实验技术与管理》 * |
| 曾正明: "《简明筑炉工手册》", 30 April 1998, 机械工业出版社 * |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109709148A (en) * | 2018-12-25 | 2019-05-03 | 哈尔滨工业大学 | Removable support and construction method for the test of reinforced beam three-face fire |
| CN109709148B (en) * | 2018-12-25 | 2021-04-13 | 哈尔滨工业大学 | Detachable support for reinforced concrete beam three-side fire test and construction method |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| Meng et al. | Support technology for mine roadways in extreme weakly cemented strata and its application | |
| Xie et al. | Failure analysis and control technology of intersections of large-scale variable cross-section roadways in deep soft rock | |
| CN104727466B (en) | Screw bolt-type and reinforcing bar type curtain wall brick exterior wall | |
| CN103835413A (en) | Foamed concrete bearing wall wrapped with wire mesh mortar boards and provided with line-shaped frame and construction method | |
| Duan et al. | A large-scale fire test of an immersed tunnel under the protection of fire resistive coating | |
| CN106245821B (en) | A kind of lightweight steel construction lightweight concrete prefabrication and assembly construction wall and its construction method | |
| CN103835404A (en) | Foamed concrete bearing wall wrapped with wire mesh mortar boards and provided with L-shaped frame and construction method | |
| Zhu et al. | Damage behavior and assessment of polyurea sprayed reinforced clay brick masonry walls subjected to close-in blast loads | |
| CN109403312A (en) | A kind of soft ground containing water hot setting method for protecting support | |
| CN207036738U (en) | A kind of tunnel roof fire resistance test device | |
| CN107085006A (en) | Tunnel roof fire resistance test device and method of testing | |
| Lin et al. | Experiment on single-tunnel fire in concrete immersed tunnels | |
| Wang et al. | Study on the performance of the new composite thermal insulation lining for the railway operational tunnel in cold regions | |
| Wang et al. | Research and application of the local differential freezing technology in deep alluvium | |
| CN111946357B (en) | Mine method tunnel simulation construction method considering red clay unloading influence | |
| Zhang et al. | Experimental study on seismic performance of fire-exposed perforated brick masonry wall | |
| CN106766929B (en) | Independent hot-blast stove on-bne repair Nai Cai transportation system and repair method | |
| Ding et al. | Experimental and theoretical study on longitudinal deformation and internal force of shield tunnel under surcharge | |
| CN103835401A (en) | Foamed concrete bearing wall wrapped with wire mesh mortar boards and provided with cross-shaped frame and construction method | |
| Zhang et al. | A novel vertical waterproofing joint with trapezoidal steel plate connections for steel–concrete underground silos: Bending test and numerical simulation | |
| CN101851692B (en) | Construction method for curing non-aqueous slurry at normal temperature in blast furnace | |
| Bamonte et al. | Crack patterns in double-wall industrial masonry chimneys: Possible causes and numerical modelling | |
| Gao et al. | Model test study on the deformation and failure characteristics of mountain tunnel under a strike-slip fault dislocation | |
| CN204461080U (en) | A kind of high-strength climbing prolongs formula double plate shell hasp furnace lining structure | |
| CN106223358B (en) | A kind of construction method for serving as a contrast casing metal sheet cold box foundation |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20170822 |