593844 五、發明説明（1 本發明係有關一軌道用吸音構造，其用於鐵路、單軌 路或類似物，且尤其有關一軌道用吸音構造，其中設置— 具有高衝擊強度之吸音薄板，該薄板係由陶器材料： 物所構成。 、 由於軌道所產生之嗓音，車辆底盤下之—噪音（諸如當車 輪在鐵軌上滾動時所產生的一滾動噪音），由於冷卻主^馬 達之風扇所產生的-馬達風m及控制用之變流器^ 產生的-車輛設㈣音’以及m係熟知為鐵路沿線 之噪音污染的原因。尤其是，就免於維修之觀點而論，近 來越來-越多地平板軌道用於鐵路上。因為此軌道表面提供 理想的反射’對該平板軌道而言，噪音的降低比習知的碎 石軌道更為需要。在儘可能靠近音源的位置測量噪音係有 益處的，特別是在降低噪音的效率方面。因此，藉由在軌 道表面上或接近軌道表面處設置一吸音板，能大量地降低 噪音。 、然而m衝擊強度的材料置於執道表面上或接近執 道表面處，用以吸收軌道表面上之聲音的案例中，除了車 輛在高速行駛所引起的風壓力及振動外，若一落下之物體 (諸如-自車體背表面落下一的务暫)與執道表面碰撞，該吸音 材料可能因落下或其他飛行之物體而毀壞。此外，材料破 片會分散’以致於擔心在其周圍可能產生第二級與第三級 意外事故或破損。因此，一設置在軌道表面上或接近執道 -5- 以便能抵抗因飛行 ，以防備可能的破 表面處的材料必須有足夠的衝擊強.度， 物體所導致之衝擊，且為一安全的構造 損。此外，在將一 表面處的案例中， 吸音薄板設置於執道表面上或接近執道 其必須觀測適用於執道之間隙極限的規 則，且必須充分地考慮軌道間隔具有一限度。 7尤之軌道用吸音材料而言，其包括普通的陶器吸 音材料、—種輕質充氣混凝土吸音材料、及-種無機顆粒 :合吸音材料。已經使用-種方法，*中將此等吸音材料 安置在接近於該軌道的範圍中。 此等材料具有0·8至u千牛頓·米/平方輯N_m/m2)的一低 一比衝笨值（美國材料試驗學會ASTM 及不足的強度 ’以致於預期該等材料會因落下或飛行物體之衝擊而毀壞 二因此，將此等材料放置於一位於執道表面上或最接近執 道表面處以外的位置。 同樣地，對於習知之軌道用吸音材料，必須增加材料的 厚度，以可控制特定聲音的吸收。因此，吸音材料的重量 會不需要的增加，以致於需要一重機械來處理該吸音材料 ’導致構造及維修的成本增加。 另一方面，當以垂直方向承受噪音時，該吸音材料通常 顯出最高的吸音特性。因此，改善吸音係數最有效的方法 即疋使用一吸音材料構造―，埯餘^造垂直承受來自軌道上方 之音源的嗓音。 然而，對習知之軌道用吸音材料而言，根據嗓音來源的 角度使用最理想的吸音構造係為困難的，因為該吸音材料 本紙適财s g家標準(CNS) A4規格(21G χ 297公爱巧 •6· 593844 五、發明説明（3 ) 不能變形為一任意的彎曲形狀。 發明概要 欲解決以上問題，發明者認真地研究發展出一種軌道用 吸音材料，其具有一顯著的吸音效果與耐久性（諸如抗衝擊 強度），並提供構造與維修的容易度，且成本較低。 因此，發明家發現以上的問題能藉由在軌道表面上或接 近執道表面處，設置一具有高衝擊強度的吸音薄板而解決 ，本發明係由此一觀點所完成。 因此，本發明提供_軌道用吸音構造，其降低自_車_ 底盤下由軌道所產生一部分的噪音，諸如當車輪在鐵軌滚 動所產生的一滚動°桑音，或一電動馬達等的揮動噪音，其 中在接近日源的軌道上或接近軌道處設置—具有高衝擊 強度^及音薄板。可使用一複合陶器吸音板作為該吸音板 ’其係藉由將一礬土陶哭好祖&士 °。材枓結合到一鋁的膨脹金屬所形 成。 依照本發明的吸音構造中， 一 中攸增加吸音效率的觀點而言 ’:衣吸音板’使其具有一曲線構造係為較佳的。同樣的 ，由於吸音薄板呈有—早讲从竹a ㈣…,立 的吸音特性（即使為薄板亦然） 於故^ 圭將吸音薄板安裝在執道内的一限定空間中，以致 率能藉由改變背空氣層的厚度而加以控制，該空 =成於吸音板與軌道-的特面之間》另外，從增加修 性與耐久性的觀點而言’較佳係在吸音薄板上設置一格 在本發明_使用之較佳吸音板係為_複合陶器吸音板， 森張尺度適s 593844 A7 B7593844 V. Description of the invention (1 The present invention relates to a sound-absorbing structure for a track, which is used for railways, monorails or the like, and particularly to a sound-absorbing structure for a track, in which a sound-absorbing sheet with high impact strength is provided, the sheet It is made of pottery materials: objects. Noise (such as a rolling noise generated when the wheels roll on the rails) under the vehicle chassis due to the noise generated by the track, such as the noise generated by the fan cooling the main motor The -motor wind m and the control converter ^ produced -the vehicle sounds and m are well-known as the cause of noise pollution along the railway. In particular, from the viewpoint of maintenance-free, more and more recently- More slab tracks are used on railways. Because the surface of this track provides ideal reflections, for this slab track, noise reduction is more needed than conventional gravel tracks. Measure the noise system as close as possible to the sound source It is beneficial, especially in terms of the efficiency of reducing noise. Therefore, by providing a sound absorbing plate on or near the track surface, the noise can be greatly reduced. However, in the case where the material with m impact strength is placed on or near the surface of the track to absorb the sound on the track surface, in addition to the wind pressure and vibration caused by the vehicle driving at high speed, if the Falling objects (such as-from the back surface of the car body) collide with the surface of the road, the sound-absorbing material may be damaged by falling or other flying objects. In addition, material fragments will be scattered 'so as to worry about its surroundings Level 2 and Level 3 accidents or damage may occur. Therefore, one must be placed on the surface of the track or close to the road -5- so as to be able to resist the flight due to the material to prevent possible damage to the surface must have sufficient impact strength Degree, the impact caused by the object, and a safe structural damage. In addition, in the case of a surface, the sound-absorbing sheet is placed on or near the surface of the road, and it must observe the gap limit applicable to the road And must fully take into account that the track interval has a limit. 7 Especially for track sound-absorbing materials, it includes ordinary ceramic sound-absorbing materials, a kind of lightweight inflatable Concrete sound-absorbing material, and an inorganic particle: a sound-absorbing material. One method has been used, and this sound-absorbing material is placed in a range close to the track. These materials have 0 · 8 to u kN · m / Square series N_m / m2) one low one specific shock value (American Society for Testing and Materials ASTM and insufficient strength 'so that such materials are expected to be destroyed by falling or the impact of flying objects) Therefore, this material is placed It is located on or near the surface of the dominating surface. Similarly, for the conventional sound-absorbing material for orbits, the thickness of the material must be increased to control the absorption of specific sounds. Therefore, the weight of the sound-absorbing material will be Unnecessary increase, so that a heavy machinery is needed to process the sound absorbing material, which leads to an increase in the cost of construction and maintenance. On the other hand, the sound absorbing material usually exhibits the highest sound absorbing characteristics when it is subjected to noise in a vertical direction. Therefore, the most effective way to improve the sound absorption coefficient is to use a sound-absorbing material to construct it, so that it can withstand the voice from the sound source above the track vertically. However, it is difficult for the conventional sound-absorbing material for orbits to use the most optimal sound-absorbing structure according to the angle of the source of the sound, because the sound-absorbing material is suitable for CNS A4 specifications (21G x 297). • 6 · 593844 V. Description of the invention (3) It cannot be deformed into an arbitrary curved shape. SUMMARY OF THE INVENTION To solve the above problems, the inventors have seriously studied and developed a sound-absorbing material for rails, which has a significant sound-absorbing effect and durability. (Such as impact resistance), and provides ease of construction and maintenance, and low cost. Therefore, the inventors found that the above problems can be achieved by providing a high impact strength on the track surface or near the road surface. The present invention is made from this viewpoint. Therefore, the present invention provides a sound-absorbing structure for a track, which reduces a part of the noise generated by the track under the vehicle, such as when the wheels are rolling on the track. A rolling ° sound, or a waving noise of an electric motor, etc., which is arranged on or near the source of the sun— High impact strength and sound sheet. A composite pottery sound-absorbing board can be used as the sound-absorbing board, which is formed by combining an alumina pottery with a strong ancestor & the material is combined with an aluminum expanded metal. In the sound-absorbing structure of the present invention, it is preferable to use a sound-absorbing board to increase the sound-absorbing efficiency from the viewpoint of increasing the sound-absorbing efficiency. Similarly, since the sound-absorbing sheet is present—early speaking from bamboo a ㈣ …, The sound absorption characteristics (even for thin plates) of Li Li therefore ^ Gui installed the sound absorption thin plate in a limited space within the channel, so that the rate can be controlled by changing the thickness of the back air layer, the air = Cheng Between the sound-absorbing panel and the special surface of the track- "In addition, from the viewpoint of improving repairability and durability, it is better to set a grid on the sound-absorbing sheet. In the present invention, the preferred sound-absorbing panel is a composite ceramic. Sound-absorbing panels, suitable for the scales 593844 A7 B7
593844 A7 B7 五、發明説明（5 圖1係為顯示依照第一實施例之一吸音構造的範例之圖 式 圖2係為顯示依照第二實施例之一吸音構造的範例之圖 式 圖3係為顯示依照第三實施例之一吸音構造的範例之圖 式。 圖4係為顯示吸音係數與頻率特性之間的關係之圖表，其 中改變了位於本發明中所使用之複合陶器吸音板背面的背 空氣層厚度。 這些圖示之中所顯示之參考數字係如以下所界定··丨複 合陶器板；2.格柵；3.鐵軌；4.枕木；5.基底框架；6 C形槽 鋼：7·安置螺栓；8·安置構件；9.支擇構件；1().吸音板支撑 構件。 主_發明之詳細說明 本 現在將參考所附之圖式，詳細說明本發明之實施例 發明並非受限於這些實施例。 第一實施例 圖Η系為依照-具體實施例之執道用吸音構造的到面圖。 1合_吸音板係'作為_吸音板’其中_蓉土陶器材料 與鋁膨脹金屬係彼此結合。 此實施例提供:種吸音構^，辦中係設置—格拇2，且能 夠控制基底框架5與複合陶哭％立4 及曰板1之間的空氣層厚度。 在兩鐵執3之間，藉著支撐構 細 /、 L形槽鋼6的支禮爽容 裝該複合陶器吸音板1。該支禮 設 叉撐構件9與C形槽鋼6係藉著 本纸張尺度適用中國國家標準(CNS) Α4規; 9- 17 ：WM4 ----------- B7 五、發明説明（6 ) '~ ------ 置於這些元件下方之基底框架5所承載，且該基底框架5本 ^係猎著許多的方法加以固^。例如，該基底框架5能夠藉 者打入釘固定到枕木4,或著在混凝土的情形中，其能夠以 孔内固定器（hole-in anchor)加以固定。同樣地該基底框架 ，夠以鎖緊螺检加以固定，如圖^所示。在此情形中，藉 著使用螺栓固定鐵軌，以固定吸音板，故並不需要在軌道 上安裝新的螺检，且此方法能夠應用於任何的地形表面， 例如：碎石或混凝土。 對於如以上說明所安裝之複合陶器吸音板丨而言，藉著改 變支撐構件9、C形槽鋼6與基底框架5之高度，能夠調整該 吸音板1與執道之底表面的距離。藉著控制位於吸音板旧 執道底表面之間背空氣層的厚度，便能夠改變吸音頻率區 域。圖4顯示吸音係數與頻率特性之間的關係，其中係改變 本發明中所使用、位於複合陶器吸音板背面之背空氣層的 厚度。此圖示顯示，對於複合陶器吸音板而言，能夠藉著 控制背空氣層之厚度來控制吸音頻率。 *由於廷些吸音特性，藉著改變吸音板1與安裝於地面之背 空氣底板間、底面與執道間，或是枕木之頂表面上或任意 處的距離（例如50到200毫米之間），能夠改變吸音頻率特^ 二因此，即使在連續執道上，能夠在不同的執道安放位置 藉著頻率適當地改變吸音_係麵賢更具體而言，當一車輛通 過時，根據產生噪音之音源，例如最常使用煞車之處或是 車輛加速之處，吸音板距離地面之高度係根據在一高音噪 音區域、一低音噪音區域等等中的噪音發生頻率而加以調 •10- 本纸張尺度適财g g家標準(CNS) A4規格(21GX29?^y 五、發明説明（ 整，稭以對於一特定頻率使吸音效率最佳化。 於：：：Γ中所使用之複合陶器吸音板具有-構造，以致 於使一恭土陶器材料與一紹膨脹金屬彼此 毫—為6到9毫米;且其重量通：3 Α斤千方未，較佳為5到15公斤/平方公分。吸立 尺寸係藉由構造軌道與構造範圍之間的距離任意決^ = 。由於軌道間的寬度通常為_ 幻 之間’吸曰板的寬度較佳係在此範圍之中。吸 ^在與軌道平行方向之長度應根據用以運送 法與該吸音板之安裝位置’適當地加以決定。板的方 “上况月之陶吸音板具有優異的耐衝擊特性。去夢 ^查比試驗（Μ™0256)互相比較該陶器吸音板之衝^ I上述之陶器吸音板1具有14千牛頓_米,平方米之衝擊 值、而曰通之陶為吸音板、-輕質充氣混凝土吸音板 、以及-無機顆粒結合吸音板分別具有U、10與"千 牛頓-米/平方米的衝擊值。也就θ _ 也就疋况，上述之陶器吸音板 吸曰板十倍或更多的衝擊強度。因此，此實施 例之陶器吸音板！並不會因為普通的衝擊而破裂，且即使593844 A7 B7 V. Description of the invention (5 Fig. 1 is a diagram showing an example of a sound absorbing structure according to one of the first embodiment Fig. 2 is a diagram showing an example of a sound absorbing structure according to one of the second embodiment FIG. 4 is a diagram showing an example of a sound-absorbing structure according to one of the third embodiments. FIG. 4 is a graph showing a relationship between a sound-absorbing coefficient and a frequency characteristic, in which the position on the back of the composite ceramic sound-absorbing board used in the present invention is changed The thickness of the back air layer. The reference numbers shown in these illustrations are as defined below: composite ceramic plates; 2. grille; 3. rails; 4. sleepers; 5. base frame; 6 C-shaped channel steel : 7 · Setting bolts; 8 · Setting members; 9. Supporting members; 1 (). Sound-absorbing plate supporting members. DETAILED DESCRIPTION OF THE INVENTION This invention will now be described in detail with reference to the accompanying drawings. It is not limited to these embodiments. The figure of the first embodiment is a top view of a sound-absorbing structure according to the implementation of the specific embodiment. 1-in_ sound-absorbing board system 'as _ sound-absorbing board' which _ Rong earthenware material Combined with aluminum expansion metal system. The embodiment provides: a sound-absorbing structure ^, the system is set up-grid thumb 2, and can control the thickness of the air layer between the base frame 5 and the composite pottery 4 and the board 1. Between the two iron holders 3, The composite ceramic pottery sound-absorbing board 1 is accommodated by the support of the supporting structure, L-shaped channel steel 6. The support is provided with the fork support member 9 and the C-shaped channel steel 6 by the standard of this paper. (CNS) Α4 regulation; 9-17: WM4 ----------- B7 V. Description of the invention (6) '~ ------ carried by the base frame 5 placed under these elements, In addition, the base frame 5 can be fixed by many methods. For example, the base frame 5 can be fixed to the sleeper 4 by driving nails, or in the case of concrete, it can be fixed with holes in the hole ( hole-in anchor). Similarly, the base frame can be fixed with a lock screw, as shown in Figure ^. In this case, the rails are fixed by bolts to fix the sound-absorbing board, so it is not necessary Install a new screw test on the track, and this method can be applied to any terrain surface, such as gravel or concrete. For as explained above As for the installed composite ceramic sound-absorbing board, the distance between the sound-absorbing board 1 and the bottom surface of the road can be adjusted by changing the height of the supporting member 9, the C-shaped channel steel 6 and the base frame 5. By controlling the sound-absorbing board The thickness of the back air layer between the bottom surface of the old track can change the sound absorption area. Figure 4 shows the relationship between the sound absorption coefficient and the frequency characteristics, which is used to change the back of the composite ceramic sound absorption board used in the present invention. The thickness of the air layer. This illustration shows that for composite ceramic sound-absorbing boards, the sound absorption rate can be controlled by controlling the thickness of the back air layer. * Due to these sound-absorbing properties, the sound-absorbing board 1 and the floor-mounted The distance between the back air floor, the bottom surface and the track, or on the top surface of the sleeper (for example, between 50 and 200 mm) can change the sound absorption rate. Therefore, even on continuous roads, Different sounding positions appropriately change sound absorption by frequency _ Department of Xianxian More specifically, when a vehicle passes, according to the sound source that generates noise, such as the most commonly used brake Where the vehicle is accelerating or the vehicle is accelerating, the height of the sound-absorbing panel from the ground is adjusted according to the frequency of noise in a treble noise area, a bass noise area, etc. • 10- This paper is suitable for financial standards ) A4 specification (21GX29? ^ Y V. Description of the invention (in order to optimize the sound absorption efficiency for a specific frequency). The composite pottery sound-absorbing board used in ::: Γ has a structure so that a ceremonial pottery material and a swollen expanded metal are between six and nine millimeters; and their weight is: 3 Α 千千 方 未, Preferably 5 to 15 kg / cm 2. The suction dimension is determined arbitrarily by the distance between the tectonic orbit and the tectonic range. Since the width between the tracks is usually _ magic, the width of the suction plate is preferably within this range. The length of the absorber in a direction parallel to the track should be appropriately determined according to the transportation method and the installation position of the sound absorbing panel. The square of the board "Summer Moon's ceramic sound-absorbing board has excellent impact resistance. Dreaming ^ Charpy test (M ™ 0256) compared the impact of the ceramic sound-absorbing board with each other ^ I The above ceramic sound-absorbing board 1 has 14 kilonewtons_ The impact value of meters and square meters, and the ceramics of Tongtong are sound-absorbing panels,-lightweight aerated concrete sound-absorbing panels, and-inorganic particle combined sound-absorbing panels have U, 10 and " kilonewtons-meters per square meter of impact values, respectively. ... In the case of θ _, the above-mentioned ceramic sound-absorbing board absorbs ten times or more of the impact strength of the board. Therefore, the ceramic sound-absorbing board of this embodiment does not break due to ordinary impact, and even if
受到一高度衝擊亦較不易破裂，能夠將損壞限制於龜裂 或類似損壞。 g A 另-方面，兩軌道之間的部通常不僅作為參與維修服 務之鐵道工作者的一通道，且亦作為緊急通道，以致於必 須使該地區處於人員能夠通過的狀態。在此實施例中，該 陶器吸音板裝於軌道3之間，且網狀或格狀金屬線格 本纸張尺度:¾㈤_ g國家標準(CNS) A4規格(210X297公爱) -11 - 五、發明説明（8 栅2係設置於該複合陶器音 之裝置並不受任何束制，例如:上二用以安裝該格柵2 ^ j如使用一種構造，苴中安置 •::8置T於該格栅寬度方向之兩端，且格柵2係安置於 ::二構件8之上。格拇2表面之尺寸能夠任意決定，因此 :見度必須能夠使人員通過’且更具體而言至少必須有3〇〇 Μ »此實施例提供-種優點’由於提供該格柵2 ,故能夠 固疋維修用之通道；且同時提供一種優點，天氣嚴寒時， 該格柵2具有作為陶器吸音板抵抗從行進中之車㈣下冰塊 的一保護裝置之功用。 弟二實施例 圖2係為依照-第二實施例，一第二軌道用吸音構造之一 剖面圖。除了第一實施例中所顯示的構 提供了-種吸音構造’其中該複合陶器吸音板【接近執道3 之兩尾端部分係變曲約90度，直到垂直於執道之頂表面為 止，以便提供-曲率。由於具有適當的挽性，故能夠藉著 彎曲使用本發明中所使用之複合陶器吸音板卜在此實施例 t ’㈣曲尾端部分係藉著吸音板支擇構件關 支撐’以形成吸音板!大部分的上述特徵，且其中央部份藉 由該C形槽鋼6與螺栓7所固定。 複合陶器吸音板丨對於來自於不同角度之噪音具有一吸 音效果，I當聲音垂直龙.蝴反之表面時具有一最佳的 吸音效S。因此，藉著使該吸音板i之兩尾端部分具有一 曲率，使執道部分產生噪音之吸音效果更為顯著。當行 進中之車輪在執道上滾動時，對於由振動所導致的滾動 -12· 本纸银尺度適用中國國家標準(CNS) A4規格(210X297公釐） 五、發明説明（9 噪音而言，從\^@3所產 向行進’且亦由於兩軌道之間V以與地面平行的方 不同之角度行進。因此，在將陶：二規則的反射，而以 的情形中，藉著設置一表面，”曰板配置於!^間 之聲音（其從軌道直行，其传為與來自於不同角度 吸音效果。因此，m 直相父’能夠增加 能夠彎曲，藉著將該吸音板之兩尸.為複合陶器吸音板〗 形，增加吸音效果。 之兩尾端部分變曲成為—圓 ^曲=並不受到任何特別的束制，如㈣所示，除了 分相約90度，直到與軌道之頂表面垂 的構k以外’能夠使用一種構造，其中將該 此 ^中=便使整個表面提供一平順的曲線，或是一種構造3’〇 ，、中更太銳地彎曲兩尾端部分（約1〇〇度卜 弟二實施丫歹I丨 。^^為㈣一第三實施例’一軌道用吸音構造之剖面圖 吸立構，生例令所不之構造以外，此實施例提供—種 及““，其中兩複合陶器吸音板1係平行佈置，以便垂直 於來自車輛底盤的回音。更具體而言，在此吸音構造中， 將接近各個兩、執道3設置之各個兩複合陶器吸音板 端部分弯曲約90度’以提供一曲率，直到垂直於軌道二 表面為止。 . /此實施例中’各該複合陶器吸音板！之兩尾端部分係藉 者吸音板支掠構件Π)所固定，且並未支樓其中央部份。因 此，該吸音板在整個寬度上具有一弓形。儘管在此實施例 -13- 本紙張尺度適财g g家標準(CNS) A4規格(210X297公爱) 佈置兩個複合陶器吸音板1，本發明並不限制於此構e 二例如，在中央部份中可另外設置一片吸音板，或是可以 置兩片或更多具有不同曲率的吸音板。 根據本發明’其能夠提供—種軌道用吸音構造，該構造 具有顯著的吸音效果’且同時顯著地增加耐用性(諸如衝擊 強度）。同樣地’此吸音構造提供易於安裝與構造，且另— 方面，提供易於維修服務，以致於整體而言使該構造且有 成本錢之特性。當將—依照本發明之吸音構造安裝於接 近住宅區的-軌道上（其中嚴格限制噪音），或是接近一車站 的區域之時(其中經常使用煞車).，該構造相當有效。 以下係為本發明參考範例之更詳細的說明，且本發明並 不限定於這些範例。 又 範例1到筋.你丨3 對於圖！中所示之構造（範例υ、圖2中所示之構造（範 、圖3中所示之構造(範例3)、-不具有吸音板之構造(比峻 範關、以及圖!中所示使用習知陶器吸音板(比較範例取 構造，在距離-輛以時速80公里之速度行進的車 處測量聲音強度。 一…、 測量結果係列於以下說明之表1之中。It is also less susceptible to cracking when subjected to a high impact, and can limit damage to cracks or the like. g A On the other hand, the department between the two tracks usually serves not only as a passageway for railway workers participating in maintenance services, but also as an emergency passageway, so that the area must be in a state where personnel can pass. In this embodiment, the ceramic sound-absorbing board is installed between the tracks 3, and the mesh or grid-shaped metal wire grid paper size: ¾㈤_ g National Standard (CNS) A4 specification (210X297 public love) -11-V. Description of the invention (8 grid 2 is installed on the composite pottery sound device is not subject to any restraint, for example: the upper second is used to install the grid 2 ^ j If a structure is used, the center is placed •: 8 is placed on T The two ends of the grille in the width direction, and the grille 2 is placed on the two members 8. The size of the surface of the grille 2 can be arbitrarily determined, so: the visibility must be able to pass through people, and more specifically at least There must be 300M »This embodiment provides-a kind of advantage 'Because the grid 2 is provided, it can fix the channel for maintenance; and at the same time it provides an advantage, when the weather is severe, the grid 2 has a ceramic sound-absorbing board The function of a protection device that resists the ice from the moving car. Second embodiment FIG. 2 is a cross-sectional view of a sound absorbing structure for a second track according to the second embodiment. Except in the first embodiment The structure shown provides a sound absorbing structure where the composite pottery sound absorbing board The two end portions near the track 3 are curved about 90 degrees until they are perpendicular to the top surface of the track 3 in order to provide -curvature. Due to its proper resilience, it can be used by bending in the present invention In this embodiment, the composite pottery sound-absorbing plate is "supported by the sound-absorbing plate supporting member to close the tail end" to form a sound-absorbing plate! Most of the above features, and its central portion is made of the C-shaped channel steel. 6 is fixed with the bolt 7. The composite ceramic sound-absorbing board has a sound-absorbing effect for noise from different angles. I has the best sound-absorbing effect S when the sound is perpendicular to the surface of the butterfly. Therefore, by making the sound-absorbing The two tail ends of the plate i have a curvature, which makes the sound-absorbing effect of the noise on the road part more significant. When the wheel on the road is rolling on the road, it is suitable for rolling caused by vibration. China National Standard (CNS) A4 specification (210X297 mm) 5. Description of the invention (9 In terms of noise, from \ ^ @ 3produced to travel 'and also because V between the two orbits is at an angle different from the direction parallel to the ground March In the case of Tao: two regular reflections, and by setting a surface, "the board is arranged in the sound of! ^ Between (it goes straight from the track, it is transmitted as a sound absorption effect from different angles. Therefore, m Straight phase father 'can increase the ability to bend, by adding the two corpses of the sound-absorbing board into the shape of a composite pottery sound-absorbing board, increasing the sound-absorbing effect. The two ends of the two ends are turned into-round ^ 曲 = not subject to any special As shown by ㈣, in addition to the phase separation of about 90 degrees, up to the structure k perpendicular to the top surface of the track, 'a structure can be used in which this ^ 中 = will provide a smooth curve over the entire surface, or It is a structure of 3′〇, middle and more sharply bending the two end portions (about 100 degrees). ^^ This is a third embodiment of a section of a sound-absorbing structure for a track. In addition to the structure not specified in the example, this embodiment provides-a kind of "", where two composite ceramic sound-absorbing panels 1 are parallel Arranged so as to be perpendicular to the echo from the vehicle chassis. More specifically, in this sound absorbing structure, the end portions of each of the two composite pottery sound absorbing plates disposed near each of the two and the road 3 are bent by about 90 degrees' to provide a curvature until perpendicular to the two surfaces of the track. / / In this embodiment, each of the composite pottery sound-absorbing panels! The two tail ends are fixed by the sound-absorbing panel supporting member Π), and the central part of the building is not supported. Therefore, the sound absorbing panel has a bow shape over the entire width. Although in this embodiment -13- this paper size is suitable for gg home standard (CNS) A4 specification (210X297 public love) two composite pottery sound-absorbing panels 1 are arranged, the present invention is not limited to this structure e. For example, in the central part An additional sound-absorbing panel may be provided in the portion, or two or more sound-absorbing panels having different curvatures may be provided. According to the present invention 'it can provide a sound absorbing structure for a track which has a significant sound absorbing effect' while at the same time significantly increasing durability (such as impact strength). Similarly, this sound absorbing structure provides easy installation and construction, and, on the other hand, provides easy maintenance services, so that the structure as a whole has a cost characteristic. This structure is quite effective when the sound-absorbing structure according to the present invention is installed on a track close to a residential area (where noise is strictly limited) or close to a station where brakes are often used. The following are more detailed descriptions of reference examples of the present invention, and the present invention is not limited to these examples. Again Example 1 to tendon. You 丨 3 For pictures! The structure shown in the example (example υ, the structure shown in Figure 2 (fan, the structure shown in Figure 3 (example 3),-the structure without a sound-absorbing panel (Bijun Fanguan, and shown in Figure! Use a conventional pottery sound-absorbing board (comparative example to take the structure, and measure the sound intensity at a distance-a car traveling at a speed of 80 kilometers per hour.) The measurement results are listed in Table 1 below.