JPH0424481B2 - - Google Patents
Info
- Publication number
- JPH0424481B2 JPH0424481B2 JP20961383A JP20961383A JPH0424481B2 JP H0424481 B2 JPH0424481 B2 JP H0424481B2 JP 20961383 A JP20961383 A JP 20961383A JP 20961383 A JP20961383 A JP 20961383A JP H0424481 B2 JPH0424481 B2 JP H0424481B2
- Authority
- JP
- Japan
- Prior art keywords
- sleeper
- center
- groove
- neutral shaft
- post
- 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
- 241001669679 Eleotris Species 0.000 claims description 35
- 229910000831 Steel Inorganic materials 0.000 claims description 12
- 239000010959 steel Substances 0.000 claims description 12
- 230000007935 neutral effect Effects 0.000 claims description 7
- 238000005452 bending Methods 0.000 description 9
- 238000000034 method Methods 0.000 description 4
- 239000003973 paint Substances 0.000 description 2
- 238000010008 shearing Methods 0.000 description 2
- JOYRKODLDBILNP-UHFFFAOYSA-N Ethyl urethane Chemical compound CCOC(N)=O JOYRKODLDBILNP-UHFFFAOYSA-N 0.000 description 1
- 238000004873 anchoring Methods 0.000 description 1
- 239000010426 asphalt Substances 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 229920003002 synthetic resin Polymers 0.000 description 1
- 239000000057 synthetic resin Substances 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
Landscapes
- Slide Fasteners, Snap Fasteners, And Hook Fasteners (AREA)
- Apparatus For Radiation Diagnosis (AREA)
- Manufacturing Of Tubular Articles Or Embedded Moulded Articles (AREA)
Description
【発明の詳細な説明】
産業上の利用分野
この発明は、中央半固定ポストテンシヨン方式
PC枕木に関する。[Detailed Description of the Invention] Industrial Application Field This invention is based on a central semi-fixed post tension system.
Regarding PC sleepers.
従来技術の問題点
枕木に働く外力はレール上を走行する輪荷重と
これに対する反作用として働く道床砂利による反
力とがある。Problems with the Prior Art External forces acting on the sleepers include the load of wheels running on the rails and the reaction force caused by roadbed gravel acting as a reaction to this.
この外力により枕木に発生する曲げモーメント
の値の大きい所は、レール直下とゲージ中央（枕
木中央）とである。枕木中央に於ける曲げモーメ
ントは道床砂利の搗き固め如何によつて非常に大
きくなることがあり、これをさけるため第５図の
様に左右レール直下にそれぞれブロツクを有し、
これを継ぎ合せる様にバー（タイバー）５を有す
る枕木が考えられている。 The locations where the bending moment generated in the sleeper due to this external force is large are directly below the rail and at the center of the gauge (center of the sleeper). The bending moment at the center of the sleeper can become very large depending on how hard the road bed gravel is.
A sleeper having a bar (tie bar) 5 for joining these together has been considered.
この場合、枕木中央に於てはヒンジの様に曲げ
に抵抗せず、ゲージ保持の役割のみはたす様にし
たものである。 In this case, the center of the sleeper does not resist bending like a hinge, but only serves the role of holding the gauge.
しかし枕木中央が完全なヒンジでは左右のブロ
ツクが自由にこがえりレールのネジレが発生す
る。 However, if the center of the sleeper is completely hinged, the left and right blocks will curl freely, causing the rail to twist.
そのため、タイバー（継ぎ合せるためのバー）
に型断面等剛性を持たす様にすることがある。 Therefore, tie bars (bars for joining)
In some cases, the cross section of the mold is made to have rigidity.
この場合、左右両ブロツクと剛性を有するタイ
バーとが急激な断面変化を有するためとかくブロ
ツクとタイバーとの継ぎ目に於て破損することが
多い。この欠点を除くため第６図に示す様なプレ
テンシヨン方式による中央部半固定プレテンシヨ
ン方式PC枕木が考えられている。 In this case, because both the left and right blocks and the rigid tie bar have sudden cross-sectional changes, breakage often occurs at the joint between the block and the tie bar. In order to eliminate this drawback, a pretension type pretension type PC sleeper with a semi-fixed central part as shown in FIG. 6 has been considered.
この方式は枕木中央に弾性体６を挿入し、コン
クリート硬化後PC鋼線をゆるめてコンクリート
に応力を入れるが枕木中央は弾性体６があるため
この部分だけ応力の入り方が少なく、そのため弾
性体に残る応力だけが曲げに抵抗する半固定とな
る。 In this method, an elastic body 6 is inserted in the center of the sleeper, and after the concrete hardens, the PC steel wire is loosened to apply stress to the concrete. However, since there is an elastic body 6 in the center of the sleeper, there is less stress in this part, so the elastic body Only the stress that remains at becomes semi-fixed, resisting bending.
しかしこの方法はPC鋼線とコンクリートとの
府着力によつて応力を入れるプレテンシヨン方式
であり比較的細い鋼線を多数使用するため枕木中
央に於てはPC鋼線に応力が少なくなつており、
断面も細く枕木中央に於て剪断力を伝える事がで
きず、このため枕木中央に於て剪断破壊がおき
る。 However, this method is a pretension method that applies stress by the anchoring force between the PC steel wire and the concrete, and because a large number of relatively thin steel wires are used, the stress on the PC steel wire at the center of the sleeper is reduced. ,
The cross section is also thin and shearing force cannot be transmitted to the center of the sleeper, which causes shear failure at the center of the sleeper.
発明の目的
この発明は、前記従来の問題点を解消するため
に提案されたもので、構造設計上の無駄がなく経
済的設計が可能でしかも、良好な外観を維持し得
る中央半固定ポストテンシヨン方式のPC枕木を
提供することを目的とする。Purpose of the Invention The present invention was proposed in order to solve the above-mentioned problems of the conventional art. The purpose is to provide a new type of PC sleeper.
発明の構成
この発明は、ポストテンシヨン方式PC枕木の
PC鋼棒をPC枕木両端部においては中立軸の下側
部を挿通させ、PC枕木中央部においては中立軸
部を挿通させ、かつ前記PC枕木中央部の外側に
その周方向に連続する溝部を形成し、当該溝部に
カバーを嵌着することによつて前記目的を達成す
るものである。Composition of the Invention This invention provides a post-tension type PC sleeper.
The lower part of the neutral shaft of the PC steel bar is inserted at both ends of the PC sleeper, and the neutral shaft part is inserted through the center part of the PC sleeper, and a groove continuous in the circumferential direction is formed on the outside of the center part of the PC sleeper. The above object is achieved by forming a groove and fitting a cover into the groove.
実施例
以下、この発明を図示する一実施例によつて説
明すると、ポストテンシヨン方式PC枕木（以下
PC枕木という。）１は中央部が細く、両端部が中
央部より太く形成されている。また、当該PC枕
木にはその長手方向に沿つて複数本のPC鋼棒２，
２がポストテンシヨン方式によつて挿通されてい
る。PC鋼棒２，２は、PC枕木１の両端部におい
ては中立軸より下側部に挿通されPC枕木１の中
央部においては中立軸部に挿通されている。Embodiment Hereinafter, this invention will be explained with reference to an embodiment illustrating a post-tension type PC sleeper (hereinafter referred to as
It's called a PC sleeper. ) 1 is thin at the center and thicker at both ends. In addition, the PC sleeper has a plurality of PC steel bars 2 along its longitudinal direction.
2 is inserted by a post-tension method. The PC steel bars 2, 2 are inserted below the neutral shaft at both ends of the PC sleeper 1, and through the neutral shaft at the center of the PC sleeper 1.
PC枕木１中央部の上下面および左右側面の四
面または上面および左右側面の三面にはPC枕木
１の周方向に連続する溝部３が形成され、当該溝
部３にはカバー４が嵌着されている。カバー４は
ゴム若しくは合成樹脂等からなる弾性帯、あるい
はアスフアル若しくはウレタン等からなる防水塗
料より形成されている。 A groove portion 3 that continues in the circumferential direction of the PC sleeper 1 is formed on four sides of the upper and lower surfaces and left and right side surfaces, or on three surfaces of the upper surface and left and right sides of the central portion of the PC sleeper 1, and a cover 4 is fitted into the groove portion 3. . The cover 4 is made of an elastic band made of rubber or synthetic resin, or a waterproof paint made of asphalt, urethane, or the like.
このような構成においては、PC枕木１の中央
部は、この部分の断面サイズを両端部の断面サイ
ズより小さくし、かつPC鋼棒２，２を中立軸部
に挿通してある結果非常に大きい曲げ力に対して
は曲げ抵抗が起らないメナーゼヒンジとなる。 In such a configuration, the central part of the PC sleeper 1 is very large as a result of the cross-sectional size of this part being smaller than the cross-sectional size of both ends, and the PC steel bars 2, 2 being inserted through the neutral shaft part. It becomes a menase hinge that does not produce bending resistance against bending force.
このため、PC枕木１の中央部は半固定状態に
なり、ある程度レールこがえりに抵抗する剛性を
有し、かつ道床砂利の反力如何によつて生ずる非
常に大きい曲げモーメントに対してはヒンジとし
てのみ働く。また、PC枕木１の中央部に作用す
る剪断力に対しては主にPC鋼棒２，２に導入さ
れた引張応力が抵抗する。 Therefore, the central part of the PC sleeper 1 is in a semi-fixed state and has the rigidity to resist rail curling to some extent, and the hinge is able to withstand the extremely large bending moment caused by the reaction force of the roadbed gravel. Works only as a. Moreover, the tensile stress introduced into the PC steel bars 2, 2 mainly resists the shearing force acting on the central part of the PC sleeper 1.
発明の効果
この発明は、以上の構成からなり、PC枕木の
中央部がある程度のレールのこがえりに対しては
抵抗可能な剛性を有するが、道床砂利の反力如何
によつて生ずる非常に大きい曲げ力に対しては曲
げ抵抗が起らないメナーゼヒンジとして働くため
構造設計上、全く無駄がなく経済的設計が可能で
ある。Effects of the Invention This invention has the above-mentioned structure, and although the central part of the PC sleeper has a rigidity capable of resisting a certain degree of rail caking, it is extremely stiff due to the reaction force of the roadbed gravel. Since it functions as a menase hinge that does not produce bending resistance against large bending forces, there is no waste in terms of structural design and an economical design is possible.
また、異常に大きい荷重作用等に発生するクラ
ツクはPC枕木中央部の溝部に集中的に発生し、
しかも、この溝部は弾性帯若しくは防水塗料等の
カバーによつて塞がれているので、クラツクによ
つて外観を損うことがない。また、クラツクによ
り雨水がPC枕木内に浸入し、PC鋼棒を腐食させ
るというような問題も一切おこらない。 In addition, cracks that occur due to abnormally large loads are concentrated in the grooves in the center of the PC sleepers.
Moreover, since this groove is covered with an elastic band or a cover made of waterproof paint, the appearance will not be spoiled by cracks. Furthermore, there is no problem of rainwater entering the PC sleepers due to cracks and corroding the PC steel bars.
第１図〜第４図は、この発明の実施例を示した
もので、第１図はPC枕木の縦断平面図、第２図
はその縦断側面図、第３図および第４図は、第２
図におけるＡ−Ａ線断面図、第５図および第６図
は従来PC枕木の側面図および平面図である。
１……PC枕木、２……PC鋼棒、３……溝部、
４……弾性帯。
1 to 4 show an embodiment of the present invention. FIG. 1 is a vertical cross-sectional plan view of a PC sleeper, FIG. 2 is a vertical cross-sectional side view thereof, and FIGS. 3 and 4 are cross-sectional views. 2
The sectional view taken along the line A-A in the figure, and FIGS. 5 and 6 are a side view and a plan view of a conventional PC sleeper. 1...PC sleeper, 2...PC steel bar, 3...groove,
4...Elastic band.
Claims (1)
PC鋼棒をPC枕木両端部においては、中立軸の下
側部に挿通させ、PC枕木中央部においては、中
立軸部に挿通させ、かつ、前記PC枕木中央部の
表面にはその周方向に連続する溝部を形成し、当
該溝部にカバーを嵌着してなることを特徴とする
中央半固定ポストテンシヨン方式PC枕木。1. In post-tension type PC sleepers,
A PC steel bar is inserted through the lower side of the neutral shaft at both ends of the PC sleeper, and through the neutral shaft at the center of the PC sleeper, and is inserted into the surface of the center of the PC sleeper in the circumferential direction. A central semi-fixed post tension type PC sleeper characterized by forming a continuous groove and fitting a cover into the groove.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP20961383A JPS60102401A (en) | 1983-11-08 | 1983-11-08 | Center semi-fixing post tension system pc crosstie |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP20961383A JPS60102401A (en) | 1983-11-08 | 1983-11-08 | Center semi-fixing post tension system pc crosstie |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS60102401A JPS60102401A (en) | 1985-06-06 |
| JPH0424481B2 true JPH0424481B2 (en) | 1992-04-27 |
Family
ID=16575697
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP20961383A Granted JPS60102401A (en) | 1983-11-08 | 1983-11-08 | Center semi-fixing post tension system pc crosstie |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS60102401A (en) |
Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP4813673B2 (en) * | 2001-02-21 | 2011-11-09 | 積水化学工業株式会社 | Snowmelt pillow |
| JP4813871B2 (en) * | 2005-11-01 | 2011-11-09 | 積水化学工業株式会社 | Sleeperwood and sleeper heat-resistant cover |
| JP4878353B2 (en) * | 2008-03-31 | 2012-02-15 | 公益財団法人鉄道総合技術研究所 | Sleepers with guards |
| JP2013133589A (en) * | 2011-12-26 | 2013-07-08 | Itake Shoji Kk | Ladder type sleeper |
-
1983
- 1983-11-08 JP JP20961383A patent/JPS60102401A/en active Granted
Also Published As
| Publication number | Publication date |
|---|---|
| JPS60102401A (en) | 1985-06-06 |
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