JPS6156362B2 - - Google Patents
Info
- Publication number
- JPS6156362B2 JPS6156362B2 JP16520378A JP16520378A JPS6156362B2 JP S6156362 B2 JPS6156362 B2 JP S6156362B2 JP 16520378 A JP16520378 A JP 16520378A JP 16520378 A JP16520378 A JP 16520378A JP S6156362 B2 JPS6156362 B2 JP S6156362B2
- Authority
- JP
- Japan
- Prior art keywords
- temperature
- electric heater
- floor slab
- temperature sensor
- bridge
- 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.)
- Expired
Links
- 230000008014 freezing Effects 0.000 claims description 10
- 238000007710 freezing Methods 0.000 claims description 10
- 239000011810 insulating material Substances 0.000 claims description 5
- 230000005611 electricity Effects 0.000 claims description 4
- 238000000034 method Methods 0.000 claims description 2
- 230000020169 heat generation Effects 0.000 claims 1
- 230000002265 prevention Effects 0.000 claims 1
- 238000010438 heat treatment Methods 0.000 description 6
- 238000009429 electrical wiring Methods 0.000 description 3
- 230000007423 decrease Effects 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 239000012774 insulation material Substances 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 230000008018 melting Effects 0.000 description 2
- 238000002844 melting Methods 0.000 description 2
- 229920000049 Carbon (fiber) Polymers 0.000 description 1
- 229910001006 Constantan Inorganic materials 0.000 description 1
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 1
- JOYRKODLDBILNP-UHFFFAOYSA-N Ethyl urethane Chemical compound CCOC(N)=O JOYRKODLDBILNP-UHFFFAOYSA-N 0.000 description 1
- 239000005909 Kieselgur Substances 0.000 description 1
- 206010039203 Road traffic accident Diseases 0.000 description 1
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 1
- 229920006328 Styrofoam Polymers 0.000 description 1
- 230000002411 adverse Effects 0.000 description 1
- 239000010426 asphalt Substances 0.000 description 1
- 230000000903 blocking effect Effects 0.000 description 1
- 238000007664 blowing Methods 0.000 description 1
- 229910052918 calcium silicate Inorganic materials 0.000 description 1
- 239000000378 calcium silicate Substances 0.000 description 1
- OYACROKNLOSFPA-UHFFFAOYSA-N calcium;dioxido(oxo)silane Chemical compound [Ca+2].[O-][Si]([O-])=O OYACROKNLOSFPA-UHFFFAOYSA-N 0.000 description 1
- 239000004917 carbon fiber Substances 0.000 description 1
- 230000008602 contraction Effects 0.000 description 1
- 229910052802 copper Inorganic materials 0.000 description 1
- 239000010949 copper Substances 0.000 description 1
- 230000003247 decreasing effect Effects 0.000 description 1
- 230000006866 deterioration Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- -1 etc.) Substances 0.000 description 1
- 239000002657 fibrous material Substances 0.000 description 1
- 239000006260 foam Substances 0.000 description 1
- 239000006261 foam material Substances 0.000 description 1
- 239000003365 glass fiber Substances 0.000 description 1
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 description 1
- 239000011490 mineral wool Substances 0.000 description 1
- 229910001120 nichrome Inorganic materials 0.000 description 1
- 239000000843 powder Substances 0.000 description 1
- 230000001737 promoting effect Effects 0.000 description 1
- 230000005855 radiation Effects 0.000 description 1
- 230000002787 reinforcement Effects 0.000 description 1
- 230000008439 repair process Effects 0.000 description 1
- 230000009528 severe injury Effects 0.000 description 1
- 239000008261 styrofoam Substances 0.000 description 1
- 238000010257 thawing Methods 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
Landscapes
- Road Paving Structures (AREA)
- Bridges Or Land Bridges (AREA)
- Cleaning Of Streets, Tracks, Or Beaches (AREA)
Description
【発明の詳細な説明】
本発明は、冬期の降雪または寒冷地における橋
面の融雪、融氷を促進し橋面の凍結を防止すると
ともに床版自体の凍結をも防止する有効な手段を
提供することを目的とするものである。DETAILED DESCRIPTION OF THE INVENTION The present invention provides an effective means for promoting melting of snow and ice on a bridge surface during snowfall in winter or in cold regions, preventing freezing of the bridge surface, and also preventing freezing of the deck itself. The purpose is to
降雪または寒冷地において橋梁舗装面は降雪や
凍結によつて冬期間スリツプによる交通事故を起
す危険性があり、車輌の通行に支障をきたし物流
を損つていた。また、床版自体が凍結融解作用の
繰り返しによる劣化を常に受けているため損傷が
ひどく、その維持管理にも多大の費用がかかるの
が現状である。 In snowy or cold regions, the paved surfaces of bridges are at risk of causing traffic accidents due to slips during the winter due to snowfall or ice, impeding vehicular traffic and impairing logistics. Furthermore, the floor slab itself is constantly subject to deterioration due to repeated freezing and thawing processes, resulting in severe damage and the current situation is that it costs a lot of money to maintain and manage.
本発明は、橋面の融雪、融氷の促進および橋面
や床版自体の凍結の防止を橋梁下面に電熱ヒータ
ーを設置することにより床版を下面から暖めると
ともに保温材による保温層を形成することにより
寒気を遮断し、床版の保温をすることにより行な
おうとするのである。 The present invention promotes melting of snow and ice on the bridge surface and prevents freezing of the bridge surface and the deck itself by heating the deck from below by installing electric heaters on the underside of the bridge and forming a heat insulating layer using heat insulating material. This is done by blocking the cold air and keeping the floorboards warm.
一般に床版の内部温度は昼間と夜間とでは異な
り、夜間になつて外気温度が低下するにしたがつ
て低下してくる。降雪または寒冷地での外気温は
ほとんど氷点下になるため床版の内部温度も氷点
下になるから床版内部の水分は凍結し、凍結する
とともに橋面の降雪や融けた水も凍結する。 Generally, the internal temperature of a floor slab is different during the day and at night, and decreases as the outside temperature decreases at night. In snowy or cold regions, the outside temperature is almost below freezing, so the internal temperature of the deck slab is also below freezing, so the moisture inside the deck freezes, and along with the freezing, snowfall and melted water on the bridge surface also freezes.
そのため、床版内部の温度低下を防ぎ、かつ、
橋面が氷点下にならないようにすることが床版自
体や橋面での降雪や水分の凍結を防止することに
繋がる。 Therefore, it prevents the temperature inside the floor slab from decreasing, and
Preventing the bridge surface from falling below freezing will help prevent snowfall and moisture from freezing on the deck itself and the bridge surface.
また、河川等にかかつた橋梁では夜間でなくと
もその床版下方を吹き抜ける風によつて床版下面
よりかなりの熱が奪われ、床版の温度低下をきた
すことがわかつている。かかる点からも床版下面
に電気ヒーターを用いて暖め、かつ、保温層を形
成することは床版内部の温度の低下を防止する効
果をもつている。 In addition, it is known that in bridges over rivers, etc., the wind blowing below the deck removes a considerable amount of heat from the lower surface of the deck, causing a drop in the temperature of the deck, even at night. From this point of view, using an electric heater to heat the underside of the floor slab and forming a heat insulating layer has the effect of preventing a drop in the temperature inside the floor slab.
つぎに本発明の実施例を図面に基づいて説明す
る。 Next, embodiments of the present invention will be described based on the drawings.
第1図は橋梁の幅員方向断面図で、1はアスフ
アルト層からなる舗装面、2はコンクリート層か
らなる床版で、3は桁、4は高欄である。 Figure 1 is a cross-sectional view of the bridge in the width direction, where 1 is the pavement surface made of asphalt layer, 2 is the deck slab made of concrete layer, 3 is the girder, and 4 is the railing.
5は電気ヒーターで床版2の下面に桁3により
仕切られたスパンa,b,c毎に組として設置さ
れている。 Reference numeral 5 denotes electric heaters, which are installed as a set on the lower surface of the floor slab 2 for each span a, b, and c partitioned by girders 3.
6はサブ温度センサーでそれぞれのスパンa,
b,c毎に床版2の温度を感知してそれぞれのス
パンa,b,c毎に設置された電気ヒーター5へ
の通電を後述のメイン温度センサー7が通電可能
にしているときオンオフするように働くように床
版2に配置されている。 6 is a sub-temperature sensor with each span a,
The temperature of the floor slab 2 is sensed for each span a, b, and c, and the electricity is turned on and off to the electric heaters 5 installed in each span a, b, and c when a main temperature sensor 7, which will be described later, is enabled. It is arranged on the floor slab 2 so that it works.
7はメイン温度センサーでメイン電源端子盤と
ともに高欄4に設置される。 7 is the main temperature sensor, which is installed on the railing 4 together with the main power terminal board.
8は保温材で上記電気ヒーター5を覆うように
して床版2下面に取り付けられる。この保温材は
熱伝導率の小さい無機系および有機系の繊維状
(ロツクウール、グラスフアイバー等)、発泡状
(発泡スチロール、発泡ウレタン等)、粉状体(ケ
イソウ土、ケイ酸カルシウム等)等がある。この
保温材8は断熱層または保温層として形成され
る。 A heat insulating material 8 is attached to the lower surface of the floor slab 2 so as to cover the electric heater 5. This insulation material has low thermal conductivity, including inorganic and organic fibrous materials (rock wool, glass fiber, etc.), foam materials (styrofoam, urethane foam, etc.), and powder materials (diatomaceous earth, calcium silicate, etc.). . This heat insulating material 8 is formed as a heat insulating layer or a heat retaining layer.
電気ヒーター5、サブ温度センサー6、メイン
温度センサー7は電気配線を施し結線される。 The electric heater 5, sub-temperature sensor 6, and main temperature sensor 7 are connected by electrical wiring.
電気配線および制御の具体的実施例は第2図に
示すように高欄、橋台、床版下面等に電気配線を
施し、床版下面に防水型端子盤9を取り付け、電
気ヒーター5はそれぞれの端子盤9よりとる。 A specific example of electrical wiring and control is as shown in Fig. 2. Electrical wiring is applied to the railings, abutments, the lower surface of the floor slab, etc., a waterproof terminal board 9 is attached to the lower surface of the floor slab, and the electric heater 5 is connected to each terminal. Taken from board 9.
制御はメイン電源端子盤10の外気温を感知す
るメイン温度センサー7が外気温または橋梁構造
物の温度を感知して一定温度以下たとえば0℃以
下になると自動的にメインスイツチがオンにな
り、それぞれの端子盤9を経て電気ヒーター5に
通電される。また、電気ヒーター5の発熱により
床版が一定温度たとえば5℃以上となつたらそれ
ぞれのスパンのサブ温度センサー6が温度を感知
して端子盤9はスイツチオフとなり、そのスパン
の電気ヒーター5の通電はストツプされ、5℃以
下になつたらスイツチオンして電気ヒーター5へ
通電する仕組みとする。 The control is such that when the main temperature sensor 7 detects the outside temperature on the main power terminal board 10 senses the outside temperature or the temperature of the bridge structure and the temperature falls below a certain level, for example 0°C or below, the main switch is automatically turned on. Electricity is supplied to the electric heater 5 through the terminal board 9. Furthermore, when the floor slab reaches a certain temperature, for example, 5°C or higher due to the heat generated by the electric heater 5, the sub-temperature sensor 6 of each span detects the temperature and the terminal board 9 is switched off, and the electric heater 5 of that span is no longer energized. When the temperature is stopped and the temperature drops below 5°C, the switch is turned on to supply electricity to the electric heater 5.
なお、ここで電気ヒーターに用いられるヒータ
ー線はニクロム、カーボン繊維等の電気抵抗体が
用いられる。また、温度センサーは銅コンスタン
タン熱電体等公知のものを用いればよい。 Note that the heater wire used in the electric heater is made of an electric resistor such as nichrome or carbon fiber. Further, as the temperature sensor, a known one such as a copper constantan thermoelectric body may be used.
本発明はこのようにして構成されてなるので、
すなわち、電気ヒーターにより床版下面より橋梁
を暖めることができ、しかも、床版下面からの放
熱を保温材による断熱層により防止できる。 Since the present invention is configured in this way,
That is, the electric heater can warm the bridge from the lower surface of the deck, and heat radiation from the lower surface of the deck can be prevented by the heat insulating layer made of the heat insulating material.
また、床版のたわみ、伸縮等の挙動のため、舗
装材の耐用年数が短いため従来考えられている舗
装層内に設けるロードヒーテイング装置では舗装
手直し毎にヒーテイング装置を取り換えなければ
ならない不経済があつたのに比し、床版下面への
設置のためヒーテイング装置の取り換えの不経済
をまぬがれる利点がある。 In addition, due to the behavior of the slabs such as deflection and expansion/contraction, the service life of the pavement material is short, so the conventional road heating device installed within the pavement layer is uneconomical as it requires replacing the heating device every time the pavement is reworked. Compared to conventional heating devices, this has the advantage of avoiding the uneconomical cost of replacing the heating device because it is installed under the floor slab.
さらに、本方法では低電力を通電するだけでよ
いので、すなわちヒーター温度を+20℃程度まで
しか上げないでよいので構造物の温度勾配による
弊害が少ない。 Furthermore, since this method requires only low power to be applied, that is, it is only necessary to raise the heater temperature to about +20° C., there are few adverse effects caused by temperature gradients in the structure.
さらに別の利点として床版補強等橋梁補修時に
同時にヒーテイング装置を設けることができる。 Another advantage is that a heating device can be installed at the same time as bridge repairs such as deck slab reinforcement.
図面は本発明の実施例を示すもので、第1図は
本発明を実施した橋梁の幅員方向の説明的断面
図、第2図は配線と制御を示す説明図である。
図面において、1は舗装面、2は床版、3は
桁、4は高欄、5は電気ヒーター、6はサブ温度
センサー、7はメイン温度センサー、8は保温
材、9は端子盤、10はメイン電源端子盤であ
る。
The drawings show an embodiment of the present invention, and FIG. 1 is an explanatory cross-sectional view in the width direction of a bridge in which the present invention is implemented, and FIG. 2 is an explanatory diagram showing wiring and control. In the drawing, 1 is the pavement surface, 2 is the floor slab, 3 is the girder, 4 is the railing, 5 is the electric heater, 6 is the sub temperature sensor, 7 is the main temperature sensor, 8 is the insulation material, 9 is the terminal board, 10 is the This is the main power terminal board.
Claims (1)
を保温材で被覆するとともにこの電気ヒーターを
設置した一定範囲の箇所の一定の温度を感知し
て、電気ヒーターへの通電をオンオフするように
働くサブ温度センサーおよび任意の場所に設置さ
れて外気温または橋梁構造物の一部の温度を感知
してメイン電源の通電をオンオフするように働く
メイン温度センサーとからなり、メイン温度セン
サーが一定の外気温または橋梁構造物の一部の温
度を感知したとき通電開始となり、電気ヒーター
が発熱しその発熱を制御するために前記サブ温度
センサーが床版温度を感知し一定範囲箇所の電気
ヒーターの通電をオンオフさせることを特徴とす
る橋梁凍結防止方法。1. An electric heater is installed on the underside of the floor slab, the underside of the floor slab is covered with a heat insulating material, and the electric heater is turned on and off by sensing a certain temperature in a certain range where the electric heater is installed. It consists of a working sub-temperature sensor and a main temperature sensor that is installed at any location and works to detect the outside temperature or the temperature of a part of the bridge structure and turn on and off the main power supply. When the outside air temperature or the temperature of a part of the bridge structure is sensed, electricity starts flowing, and the electric heater generates heat.In order to control the heat generation, the sub-temperature sensor senses the deck temperature and turns on the electric heater in a certain range. A bridge freezing prevention method characterized by turning on and off.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP16520378A JPS5592404A (en) | 1978-12-28 | 1978-12-28 | Bridge antifreeze method |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP16520378A JPS5592404A (en) | 1978-12-28 | 1978-12-28 | Bridge antifreeze method |
Publications (2)
Publication Number | Publication Date |
---|---|
JPS5592404A JPS5592404A (en) | 1980-07-12 |
JPS6156362B2 true JPS6156362B2 (en) | 1986-12-02 |
Family
ID=15807791
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP16520378A Granted JPS5592404A (en) | 1978-12-28 | 1978-12-28 | Bridge antifreeze method |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS5592404A (en) |
Families Citing this family (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2006299729A (en) * | 2005-04-25 | 2006-11-02 | Taisei Rotec Corp | Pavement body and its construction method |
JP4696246B2 (en) * | 2006-04-19 | 2011-06-08 | 国立大学法人信州大学 | Freezing prevention device for bridge road surface |
CN103205932B (en) * | 2013-04-23 | 2016-06-08 | 长沙理工大学 | Pile-column bridge anti-freezing system |
-
1978
- 1978-12-28 JP JP16520378A patent/JPS5592404A/en active Granted
Also Published As
Publication number | Publication date |
---|---|
JPS5592404A (en) | 1980-07-12 |
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