JPS59118916A - Method of filling sand into sheet material for laying on soft ground - Google Patents
Method of filling sand into sheet material for laying on soft groundInfo
- Publication number
- JPS59118916A JPS59118916A JP22508382A JP22508382A JPS59118916A JP S59118916 A JPS59118916 A JP S59118916A JP 22508382 A JP22508382 A JP 22508382A JP 22508382 A JP22508382 A JP 22508382A JP S59118916 A JPS59118916 A JP S59118916A
- Authority
- JP
- Japan
- Prior art keywords
- sand
- sheet material
- water
- slurry
- sheet
- 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.)
- Granted
Links
- 239000004576 sand Substances 0.000 title claims abstract description 53
- 239000000463 material Substances 0.000 title claims abstract description 23
- 238000000034 method Methods 0.000 title claims abstract description 14
- 239000002002 slurry Substances 0.000 claims abstract description 26
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 23
- 239000002562 thickening agent Substances 0.000 claims abstract description 14
- 241000270295 Serpentes Species 0.000 claims description 2
- 229920003086 cellulose ether Polymers 0.000 abstract description 4
- 238000004062 sedimentation Methods 0.000 abstract description 2
- 230000000903 blocking effect Effects 0.000 abstract 1
- 239000004744 fabric Substances 0.000 abstract 1
- 230000035699 permeability Effects 0.000 abstract 1
- 238000009958 sewing Methods 0.000 abstract 1
- 238000010586 diagram Methods 0.000 description 3
- PCHJSUWPFVWCPO-UHFFFAOYSA-N gold Chemical compound [Au] PCHJSUWPFVWCPO-UHFFFAOYSA-N 0.000 description 3
- 239000010931 gold Substances 0.000 description 3
- 229910052737 gold Inorganic materials 0.000 description 3
- 229920002678 cellulose Polymers 0.000 description 2
- 239000001913 cellulose Substances 0.000 description 2
- 235000010980 cellulose Nutrition 0.000 description 2
- 229920001206 natural gum Polymers 0.000 description 2
- IXPNQXFRVYWDDI-UHFFFAOYSA-N 1-methyl-2,4-dioxo-1,3-diazinane-5-carboximidamide Chemical compound CN1CC(C(N)=N)C(=O)NC1=O IXPNQXFRVYWDDI-UHFFFAOYSA-N 0.000 description 1
- 239000001856 Ethyl cellulose Substances 0.000 description 1
- ZZSNKZQZMQGXPY-UHFFFAOYSA-N Ethyl cellulose Chemical compound CCOCC1OC(OC)C(OCC)C(OCC)C1OC1C(O)C(O)C(OC)C(CO)O1 ZZSNKZQZMQGXPY-UHFFFAOYSA-N 0.000 description 1
- 229920002907 Guar gum Polymers 0.000 description 1
- 229920000663 Hydroxyethyl cellulose Polymers 0.000 description 1
- 239000004354 Hydroxyethyl cellulose Substances 0.000 description 1
- 229920001479 Hydroxyethyl methyl cellulose Polymers 0.000 description 1
- 229920001612 Hydroxyethyl starch Polymers 0.000 description 1
- 229920002153 Hydroxypropyl cellulose Polymers 0.000 description 1
- 229920003171 Poly (ethylene oxide) Polymers 0.000 description 1
- 239000004372 Polyvinyl alcohol Substances 0.000 description 1
- 229920002125 Sokalan® Polymers 0.000 description 1
- 229920002472 Starch Polymers 0.000 description 1
- DPXJVFZANSGRMM-UHFFFAOYSA-N acetic acid;2,3,4,5,6-pentahydroxyhexanal;sodium Chemical compound [Na].CC(O)=O.OCC(O)C(O)C(O)C(O)C=O DPXJVFZANSGRMM-UHFFFAOYSA-N 0.000 description 1
- 229920013820 alkyl cellulose Polymers 0.000 description 1
- 125000004181 carboxyalkyl group Chemical group 0.000 description 1
- 229920003064 carboxyethyl cellulose Polymers 0.000 description 1
- 125000002057 carboxymethyl group Chemical group [H]OC(=O)C([H])([H])[*] 0.000 description 1
- 229920003090 carboxymethyl hydroxyethyl cellulose Polymers 0.000 description 1
- 239000003795 chemical substances by application Substances 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 230000018044 dehydration Effects 0.000 description 1
- 238000006297 dehydration reaction Methods 0.000 description 1
- 238000006073 displacement reaction Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000003628 erosive effect Effects 0.000 description 1
- 229920001249 ethyl cellulose Polymers 0.000 description 1
- 235000019325 ethyl cellulose Nutrition 0.000 description 1
- 239000000665 guar gum Substances 0.000 description 1
- 235000010417 guar gum Nutrition 0.000 description 1
- 229960002154 guar gum Drugs 0.000 description 1
- 229920013821 hydroxy alkyl cellulose Polymers 0.000 description 1
- 235000019447 hydroxyethyl cellulose Nutrition 0.000 description 1
- 229940050526 hydroxyethylstarch Drugs 0.000 description 1
- 239000001863 hydroxypropyl cellulose Substances 0.000 description 1
- 235000010977 hydroxypropyl cellulose Nutrition 0.000 description 1
- 229920013818 hydroxypropyl guar gum Polymers 0.000 description 1
- 229920003088 hydroxypropyl methyl cellulose Polymers 0.000 description 1
- 239000001866 hydroxypropyl methyl cellulose Substances 0.000 description 1
- 235000010979 hydroxypropyl methyl cellulose Nutrition 0.000 description 1
- UFVKGYZPFZQRLF-UHFFFAOYSA-N hydroxypropyl methyl cellulose Chemical compound OC1C(O)C(OC)OC(CO)C1OC1C(O)C(O)C(OC2C(C(O)C(OC3C(C(O)C(O)C(CO)O3)O)C(CO)O2)O)C(CO)O1 UFVKGYZPFZQRLF-UHFFFAOYSA-N 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 229920001495 poly(sodium acrylate) polymer Polymers 0.000 description 1
- 229920002401 polyacrylamide Polymers 0.000 description 1
- 239000004584 polyacrylic acid Substances 0.000 description 1
- 229920000642 polymer Polymers 0.000 description 1
- 238000006116 polymerization reaction Methods 0.000 description 1
- 229920002451 polyvinyl alcohol Polymers 0.000 description 1
- 238000005096 rolling process Methods 0.000 description 1
- 235000010413 sodium alginate Nutrition 0.000 description 1
- 239000000661 sodium alginate Substances 0.000 description 1
- 229940005550 sodium alginate Drugs 0.000 description 1
- 159000000000 sodium salts Chemical class 0.000 description 1
- 239000002689 soil Substances 0.000 description 1
- 239000008107 starch Substances 0.000 description 1
- 235000019698 starch Nutrition 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 239000011345 viscous material Substances 0.000 description 1
- 229920003169 water-soluble polymer Polymers 0.000 description 1
- 229920003170 water-soluble synthetic polymer Polymers 0.000 description 1
- 239000000230 xanthan gum Substances 0.000 description 1
- 235000010493 xanthan gum Nutrition 0.000 description 1
- 229920001285 xanthan gum Polymers 0.000 description 1
- 229940082509 xanthan gum Drugs 0.000 description 1
Classifications
-
- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D3/00—Improving or preserving soil or rock, e.g. preserving permafrost soil
Landscapes
- Engineering & Computer Science (AREA)
- Life Sciences & Earth Sciences (AREA)
- Structural Engineering (AREA)
- Agronomy & Crop Science (AREA)
- Environmental & Geological Engineering (AREA)
- Soil Sciences (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Mining & Mineral Resources (AREA)
- Paleontology (AREA)
- Civil Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Investigation Of Foundation Soil And Reinforcement Of Foundation Soil By Compacting Or Drainage (AREA)
Abstract
Description
【発明の詳細な説明】
本発明は含水比の高い粘度質上からなる軟弱地盤上に盛
土を行って仮設道路を建設する際等に用いるシート材の
円筒状袋内への砂充填方法に関するものである。DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a method for filling sand into a cylindrical bag of sheet material used when constructing a temporary road by embanking on soft ground made of viscous material with a high water content ratio. It is.
軟弱地盤上に良質な砂質土によって盛土を行 。Embankment was carried out using high quality sandy soil on soft ground.
うには盛土の゛局部的なめり込みを防止するため、第1
図に示すようなシート材1を軟弱地盤2上に敷設しその
上に盛土3を行うことが既に特開昭57−54617号
公報に示すように知られている。In order to prevent local erosion of the embankment,
It is already known, as shown in Japanese Unexamined Patent Publication No. 57-54617, to lay a sheet material 1 as shown in the figure on soft ground 2 and to build embankment 3 thereon.
前記シート材lは第2図、第3図に示すように帆布シー
ト4の裏面に細長い円筒状袋5t−複数本縫合せると共
にその円筒状袋5を横方向に相互に連通させる横袋状部
6を一定間隔に設けたものであり、さらに前記円筒状袋
5、横袋状部6の底面には適宜に排水孔7が設けられて
いる。As shown in FIGS. 2 and 3, the sheet material 1 has a horizontal bag-like part that is sewn to the back side of the canvas sheet 4 to form a plurality of elongated cylindrical bags 5t, and also allows the cylindrical bags 5 to communicate with each other in the lateral direction. 6 are provided at regular intervals, and drain holes 7 are appropriately provided on the bottom surfaces of the cylindrical bag 5 and the horizontal bag-like portion 6.
このシート材1の軟弱地盤上への敷設には第4図に示す
ように目−ル8に巻いたシート材1の端末部から円筒状
袋5及び横袋状部6に砂を充填して、順次シート材1を
展開敷設する。To lay this sheet material 1 on soft ground, as shown in FIG. , the sheet material 1 is sequentially laid out.
然しなから、この砂の充填作業は付近に設けた仮設の砂
溜槽の砂にポンプで水を加えサンドスラリーにしたもの
金、サンドポンプで吸い上げて行うが、サンドスラリー
の砂の濃度が平均すると10%〜15%で行われるので
多量のにごった余剰水が生じ、この余剰水の排出によっ
て環境等を損わないように充分な配慮を行わなければな
らないことや、円筒状袋内に局部的に砂が閉塞して以後
の充填作業に支障を来たし、作業能率が上がらない勢の
問題があった。However, this sand filling work is carried out by adding water to the sand in a temporary sand tank set up nearby using a pump to make a sand slurry, and then sucking it up with a sand pump, but the average concentration of sand in the sand slurry is Since this is carried out at a concentration of 10% to 15%, a large amount of turbid surplus water is generated, and sufficient consideration must be taken to prevent the environment from being harmed by the discharge of this surplus water. There was a problem in that sand clogged the area, hindering subsequent filling work, and hindering work efficiency.
そこでサンドスラリー中に高分子物質からなる粘性剤を
加えてこれをサンドポンプによって輸送する方法が考え
られる。この方法によればサンドスラリー中の砂の沈澱
が防止できるので、ある程度高含秒車のサンドスラリー
を充填できるが、しかしこの方法によっても通常はこれ
までの倍以上例えば金砂率30%以上のサントス2リー
を充填できるまでには至らず、これまでの倍以上の金砂
率のサンドスラリーを充填するためには極めて大型のサ
ンドポンプを必要とし不経済であった。Therefore, a method can be considered in which a viscous agent made of a polymeric substance is added to the sand slurry and the slurry is transported by a sand pump. According to this method, sedimentation of sand in the sand slurry can be prevented, so it is possible to fill sand slurry with a high sand content to a certain extent. It was not possible to fill the sand slurry with a gold sand ratio of more than twice that of the previous one, which required an extremely large sand pump, which was uneconomical.
本発明は高濃度でサンドスラリーを充填する方法を提供
することによって従来の問題を解決するものである。The present invention solves the conventional problems by providing a method of filling sand slurry at high concentrations.
本発明の軟弱地盤敷設用シート材への砂充填方法は、シ
ートとその裏面に接合した複数の細長い円筒状袋をロー
ル状に巻いて成るシート材の前記円筒状袋の端部よシ円
筒状袋内に粘稠剤を配合した水と砂の高濃度サンドスラ
リーをポンプで充填することを特徴とする。The method of filling sand into a sheet material for laying soft ground according to the present invention includes a sheet material formed by rolling a sheet and a plurality of elongated cylindrical bags joined to the back surface of the sheet material. It is characterized by filling the bag with a highly concentrated sand slurry of water and sand mixed with a thickening agent using a pump.
以下図面によって本発明の詳細な説明する。The present invention will be explained in detail below with reference to the drawings.
本発明においては充填すべき砂に水を加えて金砂率が3
0チ〜60チとなるようなサンドスラリーを作り、さら
に水溶性セルロースエーテル等の粘稠剤を加えて水の粘
度(25℃)が30センチポイズ(cp= )以上10
00 cps以下であるものとし、第5図に示すように
従来公知のミキサー9内で混練して、ピストン式コンク
リートポンプ10によってシート材11内を圧送するよ
うにする。In the present invention, water is added to the sand to be filled so that the gold sand ratio is 3.
Make a sand slurry so that the viscosity of the water is between 0 and 60 degrees, and then add a thickening agent such as water-soluble cellulose ether to increase the viscosity of water (at 25 degrees Celsius) to 30 centipoise (cp= ) or more.
00 cps or less, and as shown in FIG. 5, the mixture is kneaded in a conventionally known mixer 9 and then pumped through a sheet material 11 by a piston-type concrete pump 10.
本発明ではサンドスラリー中に高分子粘稠剤を加えるこ
とによって、サンドスラリー中の水の粘性が増し、その
結果サンドスラリー中の砂の見掛は上の透水係数が小さ
くなるので水と砂が分離せず、従って袋状部内で砂が沈
澱して閉塞スることがないので30係以上の高濃度のサ
ンドスラリーでも容易に充填できる。In the present invention, by adding a polymer thickening agent to the sand slurry, the viscosity of the water in the sand slurry increases, and as a result, the apparent hydraulic conductivity of the sand in the sand slurry decreases, so that water and sand are separated. Since the bag does not separate and, therefore, the sand does not settle and block the bag-like part, it can be easily filled with sand slurry having a high concentration of 30 parts or more.
本発明で使用する粘稠剤としては、アルキルセルロース
、ヒドロキシアルキルセルロース、カルボキシアルキル
セルロース、混合セルロースエーテルなどの水溶性セル
ロースエーテル類、天然ガム、変性天然ガム類および水
溶性合成高分子類等が挙げられる。Examples of the thickening agent used in the present invention include water-soluble cellulose ethers such as alkyl cellulose, hydroxyalkyl cellulose, carboxyalkyl cellulose, and mixed cellulose ethers, natural gums, modified natural gums, and water-soluble synthetic polymers. It will be done.
例jC−1d)fルセルロース、エチルセルロース、ヒ
ドロキシエチルセルロース、ヒドロキシプロピルセルロ
ース、カルボキシメチルセルロースナトリウム塩(CM
C)、カルボキシエチルセルロースナトリウム塩、ヒド
ロキシエチルメチルセルロース、ヒドロキシプロピルメ
チルセルロース、カルボキシメチルヒドロキシエチルセ
ル目−ス、アルギン酸ソーダ、グアガム、ヒドロキシプ
ロピルグアガム、ザンサンガム、カルボキシメチルデン
プン、ヒドロキシエチルデンプン、ポリビニルアルコー
ル、ポリアクリル酸、ポリアクリル酸ソーダ、ポリアク
リルアミド、ポリエチレンオキサイドなどである。これ
らを単独でも、2種以上を混合して用いてもよい。Example jC-1d) f Cellulose, ethylcellulose, hydroxyethylcellulose, hydroxypropylcellulose, carboxymethylcellulose sodium salt (CM
C), carboxyethyl cellulose sodium salt, hydroxyethyl methyl cellulose, hydroxypropyl methyl cellulose, carboxymethyl hydroxyethyl cellulose, sodium alginate, guar gum, hydroxypropyl guar gum, xanthan gum, carboxymethyl starch, hydroxyethyl starch, polyvinyl alcohol, polyacrylic acid , polysodium acrylate, polyacrylamide, polyethylene oxide, etc. These may be used alone or in combination of two or more.
粘稠剤の添加量は、粘稠剤を配合した水の粘度が30
cps以上1000eps以下となるように選べばよく
、粘稠剤として用いる水溶性高分子の種類と重合度によ
って異なるが、通常水に対して0.05〜10重f−程
度、好ましくは0.1〜1.0重量%程度添加すればよ
い。粘稠剤を配合した水の粘度が30 cps以下の場
合には、最早ポンプで輸送することが困難となシ、逆に
1000cps以上になるとポンプの所要動力が大きく
、また多量の粘稠剤の添加が必要となシ経済性が失われ
る。The amount of the thickening agent added is such that the viscosity of the water containing the thickening agent is 30.
cps or more and 1000 eps or less, and varies depending on the type and degree of polymerization of the water-soluble polymer used as a thickening agent, but is usually about 0.05 to 10 weight f- with respect to water, preferably 0.1 It is sufficient to add about 1.0% by weight. If the viscosity of the water containing the thickening agent is less than 30 cps, it is no longer difficult to transport it with a pump.On the other hand, if the viscosity of water is more than 1000 cps, the power required for the pump is large, and a large amount of thickening agent must be pumped. The economics of the addition is lost.
本発明方法は上記の通りであるから下記のような効果が
得られる。Since the method of the present invention is as described above, the following effects can be obtained.
(1) サンドスラリーの中の水の脱水が防がれ、従
って砂の沈澱現象が防止され、高濃度スラリーの充填が
可能となる。(1) Dehydration of the water in the sand slurry is prevented, and therefore the sand settling phenomenon is prevented, and filling of highly concentrated slurry becomes possible.
(2) サンドスラリー中の金砂率を特に50チ〜6
0%としたとき充填された水は充填後の砂容積中の空隙
を満たすように′なるので袋外へ余剰水として出ること
はない。又、この場合前記袋の排水孔は不用である。(2) Especially the gold sand ratio in the sand slurry is 50 to 6
When it is set to 0%, the filled water fills the voids in the sand volume after filling, so that excess water does not come out of the bag. Also, in this case, the drainage hole in the bag is unnecessary.
(3) ロール状に巻いたシート材がその端部からの
サンドスラリーの充填圧力によって自動的に展開敷設さ
れるようになる。(3) The rolled sheet material is automatically spread and laid by the filling pressure of sand slurry from its end.
尚、前記ピストン式コンクリートポンプとしては例えば
新潟鉄工株制の「ニイガタ・トムセンコンクリートポン
プ」(商標)や回転容積型の一軸偏心ネジボンブ、例え
ばモーノポンプ(商標)その他スネークポンプを用いて
も良い。As the piston-type concrete pump, for example, "Niigata-Thomsen Concrete Pump" (trademark) manufactured by Niigata Tekko Co., Ltd., a rotary displacement type uniaxial eccentric screw bomb, such as Mono Pump (trademark), or a snake pump may be used.
第1図はシート材の敷設状態説明図、第2図はシート材
の底面図、第3図は第2図のA−A線断面図、第4図は
シート材の敷設方法説明図、第5図はサンドスラリーの
充填方法説明図である。
1・・・シート材、2・・・軟弱地盤、3・・・盛土、
4・・・帆布シート、5・・・円筒状袋、6・・・横袋
状部、7・・・排水孔、8・・・ロール、9・・・ミキ
サー、10・・・コンクリートポンプ、11・・・シー
ト材。Fig. 1 is an explanatory diagram of the state of laying the sheet material, Fig. 2 is a bottom view of the sheet material, Fig. 3 is a sectional view taken along the line A-A in Fig. 2, and Fig. 4 is an explanatory diagram of the method of laying the sheet material. FIG. 5 is an explanatory diagram of the sand slurry filling method. 1... Sheet material, 2... Soft ground, 3... Embankment,
4...Canvas sheet, 5...Cylindrical bag, 6...Horizontal bag portion, 7...Drainage hole, 8...Roll, 9...Mixer, 10...Concrete pump, 11... Sheet material.
Claims (4)
筒状袋をロール状に巻いて成るシート材の前記円筒状袋
の端部より円筒状袋内に粘稠剤を配合した水と砂の高濃
度サンドスラリーをポンプで充填することを特徴とする
軟弱地盤敷設用シート材への砂充填方法。(1) A sheet material consisting of a sheet and a plurality of elongated cylindrical bags bonded to the back surface of the sheet material rolled up. Water and sand containing a thickening agent are poured into the cylindrical bag from the end of the cylindrical bag. A method for filling sand into a sheet material for laying on soft ground, characterized by filling a concentrated sand slurry with a pump.
チボイズ(Cp−)以上1000 cps以下であるも
のを用いることを特徴とする特許請求の範囲第1項記載
の方法。(2) The method according to claim 1, characterized in that water containing a thickening agent having a viscosity (at 25° C.) of 30 centivoise (Cp-) or more and 1000 cps or less is used.
である特許請求の範囲第1項又は第2項記載の方法。(3) The method according to claim 1 or 2, wherein the pump is a piston type concrete pump.
の範囲第1項又は第2項記載の方法。(4) The method according to claim 1 or 2, wherein the pump is a snake pump.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP22508382A JPS59118916A (en) | 1982-12-23 | 1982-12-23 | Method of filling sand into sheet material for laying on soft ground |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP22508382A JPS59118916A (en) | 1982-12-23 | 1982-12-23 | Method of filling sand into sheet material for laying on soft ground |
Publications (2)
Publication Number | Publication Date |
---|---|
JPS59118916A true JPS59118916A (en) | 1984-07-09 |
JPS6353326B2 JPS6353326B2 (en) | 1988-10-24 |
Family
ID=16823741
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP22508382A Granted JPS59118916A (en) | 1982-12-23 | 1982-12-23 | Method of filling sand into sheet material for laying on soft ground |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS59118916A (en) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH04166508A (en) * | 1990-10-30 | 1992-06-12 | Jdc Corp | Lightweight, highly fluid reinforcing soil |
CN114802834A (en) * | 2022-05-05 | 2022-07-29 | 北华大学 | Sand bag sand barrier filling vehicle |
Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS5312910A (en) * | 1976-07-22 | 1978-02-06 | Ngk Insulators Ltd | Manufacture of silicon nitride sintered articles by casting |
JPS5754617A (en) * | 1980-09-17 | 1982-04-01 | Penta Ocean Constr Co Ltd | Banking method for soft ground |
-
1982
- 1982-12-23 JP JP22508382A patent/JPS59118916A/en active Granted
Patent Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS5312910A (en) * | 1976-07-22 | 1978-02-06 | Ngk Insulators Ltd | Manufacture of silicon nitride sintered articles by casting |
JPS5754617A (en) * | 1980-09-17 | 1982-04-01 | Penta Ocean Constr Co Ltd | Banking method for soft ground |
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH04166508A (en) * | 1990-10-30 | 1992-06-12 | Jdc Corp | Lightweight, highly fluid reinforcing soil |
CN114802834A (en) * | 2022-05-05 | 2022-07-29 | 北华大学 | Sand bag sand barrier filling vehicle |
CN114802834B (en) * | 2022-05-05 | 2023-12-22 | 北华大学 | Sand bag sand barrier filling vehicle |
Also Published As
Publication number | Publication date |
---|---|
JPS6353326B2 (en) | 1988-10-24 |
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