JP2797149B2 - Laying method of asphalt pavement heating pipe - Google Patents
Laying method of asphalt pavement heating pipeInfo
- Publication number
- JP2797149B2 JP2797149B2 JP32533290A JP32533290A JP2797149B2 JP 2797149 B2 JP2797149 B2 JP 2797149B2 JP 32533290 A JP32533290 A JP 32533290A JP 32533290 A JP32533290 A JP 32533290A JP 2797149 B2 JP2797149 B2 JP 2797149B2
- Authority
- JP
- Japan
- Prior art keywords
- plastic pipe
- asphalt
- pipe
- roadbed
- cooling medium
- 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 - Lifetime
Links
Landscapes
- Road Paving Structures (AREA)
Description
本発明はアスファルト舗装路加熱用パイプの敷設方法
に関し、路盤上に予め敷設された加熱用のプラスチック
パイプが高温度に加熱されているアスファルトの打設に
よる舗装作業時に圧潰する等の不具合が生じないように
改良したものである。The present invention relates to a method for laying a pipe for heating asphalt pavement road, and does not cause a problem such as crushing of a heating plastic pipe previously laid on a roadbed at the time of pavement work by placing asphalt heated to a high temperature. This is an improvement.
路盤上に敷設してアスファルト舗装路の積雪や凍結を
防止するために用いられる加熱用パイプとしては架橋ポ
リエチレンやナイロン等のプラスチックパイプが知られ
ている。 そして、加熱用のプラスチックパイプを敷設するに
は、添付図面に示すように整地した地盤の上に小石や砂
等を敷きつめて転圧し、その上に均しアスファルトを流
して路盤１を形成する。次いで、路盤１の上に格子状に
組んだ鉄筋２を敷き、この鉄筋２上にプラスチックパイ
プ３を配管して固定する。配管完了後、表層材として15
0〜220℃に加熱したアスファルトを路盤１上に打設して
均し、ローラー等で転圧してアスファルト層４を形成す
るものである。As a heating pipe which is laid on a roadbed to prevent snow and freezing on an asphalt pavement, a plastic pipe such as cross-linked polyethylene or nylon is known. Then, in order to lay a plastic pipe for heating, as shown in the attached drawing, pebbles, sand, and the like are laid on the ground, which is rolled, and rolled, and asphalt is flowed thereon to form the roadbed 1. Next, a reinforcing bar 2 assembled in a grid pattern is laid on the roadbed 1, and a plastic pipe 3 is fixed on the reinforcing bar 2 by piping. After piping is completed, 15
The asphalt heated to 0 to 220 ° C. is cast on the roadbed 1, leveled, and rolled with a roller or the like to form the asphalt layer 4.
【発明が解決しようとする課題】 アスファルト舗装路の場合は、プラスチックパイプの
上から高温度に加熱したアスファルトが打ち込まれるた
め、プラスチックパイプは打ち込まれたアスファルトの
熱で軟化し、熱膨張を起こしてうねりを発生したり、転
圧作業時のローラー等の荷重で潰れたりする。その結
果、加熱媒体がプラスチックパイプの中をスムーズに流
れなくなる等の不具合が生じ、その使用は不可能とな
る。 このような問題を解決するための加熱用パイプの敷設
技術として、高温度に加熱したアスファルトを打設する
ときに予め路盤上に敷設されているプラスチックパイプ
の中に冷却媒体を流通し、アスファルトの打設による舗
装作業時にプラスチックパイプの熱膨張によるうねりと
か、軟化による圧潰等の不具合が生じないようにした施
工法が提案されている（特公昭52−40133号公報を参
照）。 しかし、この冷却媒体でパイプを冷却する施工法にお
いては、軟化温度が高い、例えばナイロン製のパイプの
場合には熱膨張によるうねりとか圧潰をある程度は防止
できる効果はあるが、その軟化温度が低い、例えば架橋
ポリエチレン製のパイプでは軟化による圧潰防止の点で
不十分である。 本発明は上記の点に鑑みてなされたもので、その目的
は路盤上に予め敷設された加熱用のプラスチックパイプ
内を該プラスチックパイプに流入した冷却媒体によって
所定の加圧状態に保持し、高温度に加熱されているアス
ファルトの打設による舗装作業時にプラスチックパイプ
が圧潰する等の不具合が生じないように改良したアスフ
ァルト舗装路加熱用パイプの敷設方法を提供することに
ある。In the case of an asphalt pavement, asphalt heated to a high temperature is driven from above the plastic pipe, so that the plastic pipe softens due to the heat of the driven asphalt and causes thermal expansion. It swells and is crushed by the load of the rollers during rolling work. As a result, problems such as the heating medium not flowing smoothly through the plastic pipe occur, and the use of the heating medium becomes impossible. As a technique of laying a heating pipe to solve such a problem, when casting asphalt heated to a high temperature, a cooling medium is circulated through a plastic pipe laid beforehand on a roadbed, and asphalt is There has been proposed a construction method in which problems such as undulation due to thermal expansion of a plastic pipe and crushing due to softening do not occur during pavement work by casting (see Japanese Patent Publication No. 52-40133). However, in the method of cooling the pipe with this cooling medium, the softening temperature is high, for example, in the case of a nylon pipe, there is an effect of preventing swelling or crushing to some extent due to thermal expansion, but the softening temperature is low. For example, pipes made of cross-linked polyethylene are insufficient in preventing crushing due to softening. The present invention has been made in view of the above points, and an object of the present invention is to maintain a predetermined pressurized state in a heating plastic pipe laid in advance on a roadbed by a cooling medium flowing into the plastic pipe. It is an object of the present invention to provide a method for laying an asphalt pavement heating pipe improved so as not to cause a problem such as crushing of a plastic pipe during pavement work by casting asphalt heated to a temperature.
上記目的を達成するために、本発明の特徴とするアス
ファルト舗装路加熱用パイプの敷設方法は路盤と該路盤
上に打設されるアスファルトとの間に加熱用のプラスチ
ックパイプを埋設するに当って、路盤上に敷設されたプ
ラスチックパイプに冷却媒体を流入し、その冷却媒体で
上記プラスチックパイプ内を0.05〜5kg/cm2の加圧状態
に保持しながらアスファルトを打設するものである。In order to achieve the above object, a method for laying an asphalt pavement heating pipe according to the present invention is characterized by embedding a heating plastic pipe between a roadbed and asphalt cast on the roadbed. A cooling medium flows into a plastic pipe laid on a roadbed, and asphalt is poured while the plastic medium is kept in a pressurized state of 0.05 to 5 kg / cm 2 with the cooling medium.
プラスチックパイプ内は流入した冷却媒体によって加
圧されているので、該プラスチックパイプの軟化を防止
すると共に変形を阻止し、高温度に加熱されているアス
ファルトの打設による舗装作業時にプラスチックパイプ
が圧潰する等の不具合を解消できる。Since the inside of the plastic pipe is pressurized by the inflow cooling medium, the plastic pipe is prevented from softening and deformation is prevented, and the plastic pipe is crushed during pavement work by placing asphalt heated to a high temperature. And the like can be eliminated.
以下に、本発明の実施例を添付図面を参照しながら説
明する。 路盤１と該路盤１上に打設されるアスファルト層（表
層）４との間に加熱用のプラスチックパイプ３を埋設す
るに当って、路盤１上に格子状に組んだ鉄筋２を介して
敷設されたプラスチックパイプ３に冷却媒体を流入し、
その冷却媒体で上記プラスチックパイプ内を0.05〜5kg/
cm2好ましくは0.5〜1kg/cm2の加圧状態愛に保持しなが
らアスファルトを打設して本発明を実施する。 上記構成において、プラスチックパイプ３としては内
径が10〜30mm、肉厚が１〜3mmである架橋ポリエチレン
やナイロン等で成形されたものが、また冷却媒体として
は水や水と不凍液の混合液体、空気等がそれぞれ用いら
れる。そして、冷却媒体による加圧は、0.05kg/cm2未満
ではプラスチックパイプの圧潰を防止することは不可能
であり、また、5kg/cm2超過ではプラスチックパイプの
うねりが激しくなり、場合によってはパイプ破壊現象を
起こす。なお、プラスチックパイプ３の出口側にバルブ
を取り付け、このバルブを全閉して内圧を所定の範囲に
維持するか、バルブの開度を調節して冷却媒体による内
圧を所定の範囲に維持する。 （具体例） 幅が4mの路盤状に格子状に組んだ鉄筋を敷き、その上
に内径が3mm、肉厚が2mmの架橋ポリエチレンパイプを15
0mm間隔で蛇行状態に配管して、180℃に加熱したアスフ
ァルトを打ち込み、アスファルトフィニッシャーで10屯
の荷重を欠けて均し、厚さが80mmのアスファルト層を設
けた。この舗装作業時に温度が20℃の水道水を流通しな
がらパイプ内を0.8kg/cm2（実施例Ｉ）、3.0kg/cm2（実
施例II）の加圧状態に保持した。上記のようにして舗装
道路施工後、アスファルト舗装を剥がし、パイプの変形
（偏平度）を測定した結果を後記の表に示す。上記パイ
プの変形、即ち扁平度Ｅは断面円形のパイプが楕円形に
変形したときの短軸をａ、長軸をｂとして、次式により
求めた。 なお、本発明の比較例としてパイプ内を0kg/cm2（実
施例Ｉ）、6.0kg/cm2（実施例II）の加圧状態に保持し
た。 Hereinafter, embodiments of the present invention will be described with reference to the accompanying drawings. In embedding the heating plastic pipe 3 between the roadbed 1 and the asphalt layer (surface layer) 4 cast on the roadbed 1, the plastic pipe 3 is laid on the roadbed 1 via the reinforcing bars 2 assembled in a grid. The cooling medium flows into the plastic pipe 3
With the cooling medium, the inside of the plastic pipe is 0.05 to 5 kg /
The present invention is carried out by pouring asphalt while maintaining the pressurized state of cm 2, preferably 0.5 to 1 kg / cm 2 . In the above configuration, the plastic pipe 3 is formed of crosslinked polyethylene or nylon having an inner diameter of 10 to 30 mm and a thickness of 1 to 3 mm, and the cooling medium is water, a mixed liquid of water and antifreeze, or air. Etc. are respectively used. Then, the pressure of the cooling medium is that is not possible at less than 0.05 kg / cm 2 to prevent the collapse of the plastic pipe, also intensifies the waviness of the plastic pipe at 5 kg / cm 2 exceeded, in some cases a pipe Causes destruction. A valve is attached to the outlet side of the plastic pipe 3 and the valve is fully closed to maintain the internal pressure in a predetermined range, or the opening degree of the valve is adjusted to maintain the internal pressure of the cooling medium in a predetermined range. (Specific example) A grid-shaped reinforcing bar is laid in a 4 m wide roadbed shape, and a cross-linked polyethylene pipe with an inner diameter of 3 mm and a thickness of 2 mm is placed on top of it.
Plumbing was performed in a meandering state at 0 mm intervals, asphalt heated to 180 ° C. was driven in, the load was reduced to 10 tons by an asphalt finisher, and an asphalt layer having a thickness of 80 mm was provided. During this pavement operation, the inside of the pipe was maintained at a pressurized state of 0.8 kg / cm 2 (Example I) and 3.0 kg / cm 2 (Example II) while flowing tap water having a temperature of 20 ° C. After construction of the pavement road as described above, the asphalt pavement was peeled off, and the results of measuring the deformation (flatness) of the pipe are shown in the table below. The deformation of the pipe, that is, the flatness E, was obtained by the following equation, where a is the short axis and b is the long axis when the pipe having a circular cross section is deformed into an elliptical shape. As a comparative example of the present invention, the inside of the pipe was maintained at a pressurized state of 0 kg / cm 2 (Example I) and 6.0 kg / cm 2 (Example II).
本発明は上記の如くであって、アスファルト舗装路の
施工時に高温度（150〜220℃）に加熱されたアスファル
トが打設された場合でもプラスチックパイプ内を冷却媒
体によって所定の加圧状態に保持しているため、プラス
チックパイプは均しローラー等の荷重によって潰れる心
配はない。しかも、本発明に係る敷設方法はプラスチッ
クパイプの中でも軟化点が低い架橋ポリエチレン製パイ
プを用いて実施する場合に、この効果は顕著である。The present invention is as described above. Even when asphalt heated to a high temperature (150 to 220 ° C.) is poured during construction of an asphalt pavement, a predetermined pressurized state is maintained in the plastic pipe by a cooling medium. Therefore, there is no fear of the plastic pipe being crushed by the load of the leveling roller or the like. Moreover, this effect is remarkable when the laying method according to the present invention is performed using a crosslinked polyethylene pipe having a low softening point among plastic pipes.
図面は従来例を兼ねて本発明に係る敷設方法を実施した
舗装路を示す略示的断面図である。The drawing is a schematic cross-sectional view showing a pavement road on which the laying method according to the present invention is implemented, also serving as a conventional example.
Claims (1)
との間に加熱用のプラスチックパイプを埋設するに当っ
て、路盤上に敷設されたプラスチックパイプに冷却媒体
を流入し、その冷却媒体で上記プラスチックパイプ内を
0.05〜5kg/cm2の加圧状態に保持しながらアスファルト
を打設することを特徴とするアスファルト舗装路加熱用
パイプの敷設方法。When a plastic pipe for heating is buried between a roadbed and asphalt cast on the roadbed, a cooling medium flows into the plastic pipe laid on the roadbed, and the cooling medium flows into the plastic pipe. With the above plastic pipe
A method of laying asphalt pavement heating pipe laying, characterized by laying asphalt while maintaining a pressurized state of 0.05 to 5 kg / cm 2 .
Priority Applications (7)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP32533290A JP2797149B2 (en) | 1990-11-29 | 1990-11-29 | Laying method of asphalt pavement heating pipe |
| EP91120421A EP0488305B1 (en) | 1990-11-29 | 1991-11-28 | Method for constructing asphalted road having heating pipe laid thereunder |
| DE69111992T DE69111992T2 (en) | 1990-11-29 | 1991-11-28 | Process for the production of bituminous roads with heating pipes laid underneath. |
| CA002056521A CA2056521A1 (en) | 1990-11-29 | 1991-11-28 | Method for constructing asphalted road having heating pipe laid thereunder |
| AT91120421T ATE126299T1 (en) | 1990-11-29 | 1991-11-28 | METHOD FOR PRODUCING BITUMINOUS ROADS WITH HEATING PIPES LAYED UNDER THEM. |
| US07/800,043 US5257876A (en) | 1990-11-29 | 1991-11-29 | Method for constructing asphalted road having heating pipe laid thereunder |
| KR1019910021778A KR0182812B1 (en) | 1990-11-29 | 1991-11-29 | Method for constructing asphalted road having heating pipe laid thereunder |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP32533290A JP2797149B2 (en) | 1990-11-29 | 1990-11-29 | Laying method of asphalt pavement heating pipe |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH04198505A JPH04198505A (en) | 1992-07-17 |
| JP2797149B2 true JP2797149B2 (en) | 1998-09-17 |
Family
ID=18175628
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP32533290A Expired - Lifetime JP2797149B2 (en) | 1990-11-29 | 1990-11-29 | Laying method of asphalt pavement heating pipe |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2797149B2 (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP5824590B1 (en) * | 2015-05-02 | 2015-11-25 | 株式会社柿本商会 | Road surface snow melting structure construction method |
| CN113638283B (en) * | 2021-06-30 | 2023-06-30 | 徐州市政建设集团有限责任公司 | Road structure for protecting shallow buried pipeline for municipal transformation |
-
1990
- 1990-11-29 JP JP32533290A patent/JP2797149B2/en not_active Expired - Lifetime
Also Published As
| Publication number | Publication date |
|---|---|
| JPH04198505A (en) | 1992-07-17 |
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