雪氷チーム・寒地機械技術チーム

Snow and Ice Reserch Team / Machinery Technology Research Team

石狩吹雪実験場の概要 北ゾーン
Outline of the Ishikari Blowing-Snow Test Field: The North Zone
石狩吹雪実験場は、札幌市中心部から北方約 17km の石狩川下流部旧河川敷に位置します。
この地域は、冬期に強い北西の季節風を受けて北海道内でも吹雪頻度が最も高い地域のひとつです。
このため、一般道では実施困難なフルスケールでの吹雪や視程障害に対する走行実験が可能です。実験場内は、吹雪対策施設や吹きだまりの実験を行う「南ゾーン」と試験走行路を中心とした「北ゾーン」に分かれています。
The Ishikari Blowing-Snow Test Field is about 17 km north of downtown Sapporo. The test field was constructed on a dry riverbed at the lower reaches ofthe Ishikari River. This area frequently has strong northwesterly winds in winter. Its frequency of snowstorm occurrence is among the highest in Hokkaido.
The natural conditions of the test field enable tests, including those on driving in snowstorm or poor visibility, that are difficult on roads in service. The
South Zone is installed with a various blowing-snow countermeasures applied track and a snowdrift test track. The North Zone is installed with a test track.

北ゾーンの概要
The North Zone

北ゾーンは、1 周 800m の試験走行路や気象観測装置等で構成され、吹雪による視程障害下での視線誘導施設や車両等の視認性の調査、気象条件と視程障害の関係解明に向けた調査などを行っています。
また、吹雪室内実験装置では、防雪柵や防雪林等の吹雪対策施設に関する実験を行なっています。

Installed with the 800 m test track and various weather observation instruments, investigations on the visibility of delineation facilities and vehicles under poor visibility conditions in blowing snow are done in the zone. Elucidation of the relationshipbetween weather conditions and poor visibility is included in the investigations doneon the track.The indoor wind tunnel is used for experiments related to snowstorm
countermeasure facilities, including snowfences and snowbreak woods.

< 沿革 >・S63 石狩実験場にて研究開始
・H7 吹雪観測棟整備
・H8 試験走行路整備 ( 直線部 )、気象観測機器再整備
・H9 落石雪崩実験装置、試験走路門型柱設置
・H13 試験走行路周回部完成、吹雪観測棟移設、PIARC 冬期道路 AHS デモ・H21 直線路 舗装打替、
データ処理棟整備
・H22 吹雪室内実験装置設置< 諸元データ等 >・本線：暫定 2 車線 簡易分離
・周回延長：L= 約 800ｍ
・道路延長：直線部 L=300ｍ : 曲線部 L=500ｍ
・道路幅員：W=15ｍ
Facility dimensions- Circuit track: two temporarily divided lanes- Circuit track length: 800 m- Straight section: 300 m; curved section: 500 m- Track width: 15 m

History
1988: Studies start at the test field.
1995: The Blowing-Snow Observation Building is completed.
1996: The test track (straight section) is completed; weather observation instruments are renewed.
1997: Rock fall test equipment and a gantry on the test track are completed.
2001: The curves that connect the straight sections are completed; the Blowing-Snow
Observation Building is moved; an AHS demonstration for
the PIARC Winter Road Congress is conducted.
2009: The straight sections are repaved;
the Data Processing Building is completed.
2010: The indoor wind tunnel for blowing-snow experiments
is completed.

北ゾーン
南ゾーン

曲線半径 R＝50m
Curve radius

データ処理棟Data processing building

平面図
Top view

吹雪室内実験装置
Indoor wind tunnel forblowing-snow experiments

ガントリ P=105.000
Gantry

観測棟 P=77.500
Observation building

本実験場には次のような実験観測施設が整備されています。
● 気象測器（風向風速計、雨量計、視程計、積雪深計） ● ＩＴＶカメラ● 道路照明● 録画装置● 道路情報板● 固定式視線誘導柱● 視程板● 吹雪粒子計（SPC） ● データ処理棟 ● 観測棟●吹雪室内実験装置

カメラ塔 P=400.000
ITV cameras

直線部延長 300m
Length of straight section

The following experiment and observation facilities are at the field.
- Weather station (aerovane, precipitation meter,
visibility meter, snow depth meter)- ITV cameras- Road lighting- Video recorder- Variable message board- Fixed-post delineators with arrow-shaped pointers- Visibility boards- Snow particle counter (SPC)- Data processing building- Observation building- Indoor wind tunnel for blowing-snow experiments

実験状況

Experiments at the Test Field
三次元トラバース装置
3D traversing unit

軸流送風機
Axial fan

整流網
Turbulence-reducing
screens

開放・回流切換部Open/closed circuit
switching section
測定胴 Test section（W1200×H1200×L9000）
風速調整装置Wind velocity
control device

空気圧縮機Compressor

視線誘導施設や車両の視認性調査
Test on visibility of several types of delineators and cars inblowing snow

気象条件と視程障害の関係解明に向けた調査
Investigation of the relationship between
weather conditions and visibility hindrances

安全・快適

北の道

Safe, pleasant driving on Northern Roads

模型雪供給装置
Model snow
supply device

吹雪室内実験装置による防雪柵の性能評価試験
Performance evaluation of snowfencesusing the indoor wind tunnel

独立行政法人土木研究所 寒地土木研究所

フィルター
Filter

Incorporated Administrative Agency Public Works Research Institute Civil Engineering Research Institute for Cold Region

雪氷チーム・寒地機械技術チーム

Snow and Ice Reserch Team / Machinery Technology Research Team

石狩吹雪実験場の概要 南ゾーン
Outline of the Ishikari Blowing-Snow Test Field: The South Zone
石狩吹雪実験場は、札幌市中心部から北方約 17km の石狩川下流部旧河川敷に位置します。
この地域は、冬期に強い北西の季節風を受けて北海道内でも吹雪頻度が最も高い地域のひとつです。
このため、一般道では実験実施困難なフルスケールでの吹雪や視程障害に対する走行実験が可能です。実験場内は、吹雪対策施設や吹きだまりの実験を行う「南ゾーン」と試験走行路を中心とした「北ゾーン」に分かれています。
The Ishikari Blowing-Snow Test Field is about 17 km north of downtown Sapporo. The test field was constructed on a dry riverbed at the lower reaches of
the Ishikari River. This area frequently has strong northwesterly winds in winter. Its frequency of snowstorm occurrence is among the highest in Hokkaido.
The natural conditions of the test field enable tests, including those on driving in snowstorm or poor visibility, that are difficult on roads in service. TheSouth Zone is installed with a various blowing-snow countermeasures applied track and a snowdrift test track. The North Zone is installed with a test track.

南ゾーンの概要The South Zone

南ゾーンは、道路防雪林の育成施設、防雪柵の実験施設、吹きだまり試
験道路で構成され、道路防雪林の造成手法、防雪柵の性能評価、吹雪対策技術の開発、吹きだまり災害の防止に関する調査などを行っています。
< 沿革 >
・H14 南ゾーン使用開始、吹き払い柵の開発試験 (H14-16)
・H17-18 防雪柵設置 ( 吹き止め柵 )・H21 防雪林試験地、切土道路・盛土道路新設、防雪柵増設 ( 吹き払い柵 )The South Zone includes the Snowbreak Woods Cultivation Test Area, an experiment
facility for snowfences, and a test track for snowdrift experiments. The development ofmethods for creating road snowbreak woods, evaluating the performance of snowfences,developing technologies for blowing-snow countermeasures, and investigating the prevention of snowdrift disasters are conducted in this zone.
北ゾーン

南ゾーン

History
2002: The South Zone enters use; experiments are conducted for the development of blower snowfences (2002 – 2004).
2005, 2006: Snowfences are installed (collector upwind snowfences).
2009: The Snowbreak Woods Cultivation Test Area, a test track with cut and fill earthworks is completed;additional snowfences are installed (blower snowfences).
< 諸元データ等 >・防雪林試験地 20m×100m
・防雪柵 吹き止め柵 102m、吹き払い柵 49m
・吹きだまり試験道路 盛土部 L=30m、切土部 L= 30m
Facility dimensions- Snowbreak Woods Cultivation Test Area: 20 m x 100 m- Snowfences: Collector upwind snowfence: 102 m
Blower snowfence: 49 m
- Snowdrift Experiment Track: Fill section: 30 m
Cut section: 30 m

防雪林の育成試験地

観測準備室
Observation preparation room

防雪柵の実験施設

吹きだまり試験道路

Snowfence Experiment Facilities

Snowdrift Experiment Road

吹き払い柵
Blower snowfence
L=49m

盛土道路
Fill section

吹き止め柵
Collector upwind snowfence

切土道路
Cut section

L=102mSnowbreak Woods Cultivation Test Area

L=30m

L=20m
観測準備室
Observation preparation room

防雪林
Snowbreak woods

L=30m

L=100m

防雪林の育成試験地

防雪柵の実験施設

吹きだまり試験道路

道路防雪林は、吹雪対策として整備が進められています
が、植栽後生育不良となる樹木も見られます。
その一因は生育基盤の構造と考えられており、ここでは生育基盤の造成手法を中心に、防雪林の育成管理に関する研究を行います。

防雪柵は、風を弱めたり、方向を調整することによって道路上の吹きだまりを防ぎ吹雪時の視程を改善する施設です。
ここでは防雪柵の機能を評価するため、吹きだまり形状や道路上での視程を計測しています。

切土道路では盛土道路に比べて吹きだまりが発生しやすくなります。
ここでは道路構造による吹きだまり形状や速度の違いを把握し、災害を未然に防ぐための調査を行います。

The installation of snowbreak woods for roads has been promoted as a blowing-snow countermeasure. However, someof the trees in such planted forests have shown insufficient
growth. One possible reason is how the planting bed wasprepared. In the test area, studies are conducted on the cultivation management of snowbreak woods, particularly methods for preparing the planting bed.

Snowfences attenuate or redirect winds in order to reduce
snowdrifts on roads and improve visibility during blowing
snow. To evaluate the performances of such fences, theshapes of snowdrifts and visibility on a test track section aremeasured.

Snowdrifts form more often on the cut sections of a roadthan on the fill sections. On this test track, investigations forpreventing disasters caused by snowdrifts are done throughexperiments to understand the relationship between the roadstructure and the shape of resulting snowdrifts and the difference between the speeds of snowdrift formation at thetwo sections.

育成試験地の全景
Overview of Snowbreak Woods
Cultivation Test Area

吹き払い柵
Blower snowfence

Snowbreak Woods Cultivation Test Area

Snowfence Experiment Facilities

試験苗木 ( アカエゾマツ )Sapling (Sakhalin spruse)

安全・快適

北の道

Safe, pleasant driving on Northern Roads

吹き止め柵
Collector upwind snowfence

Snowdrift Experiment Road

盛土道路
Fill section of the test track

独立行政法人土木研究所 寒地土木研究所

切土道路
Cut section of the test track

Incorporated Administrative Agency Public Works Research Institute Civil Engineering Research Institute for Cold Region