JP2004169294A - Method for preventing collapse of mt. fuji - Google Patents

Method for preventing collapse of mt. fuji Download PDF

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JP2004169294A
JP2004169294A JP2002333227A JP2002333227A JP2004169294A JP 2004169294 A JP2004169294 A JP 2004169294A JP 2002333227 A JP2002333227 A JP 2002333227A JP 2002333227 A JP2002333227 A JP 2002333227A JP 2004169294 A JP2004169294 A JP 2004169294A
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protective plate
continuous protective
helicopter
slope
continuous
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JP3723541B2 (en
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Seiichi Ozawa
清一 小沢
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Seiichi Ozawa
清一 小沢
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Abstract

<P>PROBLEM TO BE SOLVED: To provide a method for preventing collapse of Mt. Fuji, which is carried out in a short construction period and at a lower construction cost. <P>SOLUTION: A number of bearing piles (1) and protective plates (21) are produced beforehand, and the bearing piles are dropped from the air to a slant area (35) by a helicopter, followed by erecting the bearing piles at predetermined intervals. Next the protective plates are hung from the helicopter and erected by leaning on the bearing piles, followed by serially arranging the protective plates in the dip area, to thereby form a continuous protective plate (38). Then the continuous protective plates are arranged in multiple stages in the dip area, and the other bearing piles are dropped and erected at locations between the upper and lower continuous protective plates from the air by the helicopter. Further, reinforcements (51) are dropped at the locations between the upper and lower continuous protective plates from the air by the helicopter, and the reinforcements are assembled, followed by dropping ready mixed-concrete at the locations between the upper and lower continuous protective plates from the air by the helicopter, to thereby form a steel-reinforced concrete section (57). <P>COPYRIGHT: (C)2004,JPO

Description

【0001】
【発明の属する技術分野】
本発明は、富士山の崩壊予防方法に関するものであり、更に詳しくは富士山大沢崩れに絶え間なく続いている土砂の崩落を防止することにより富士山の崩壊を予防する方法に係るものである。
【0002】
【従来の技術】
富士山大沢崩れにおいては、山頂から標高約2,000メートルの高さまで、長さ約2,000メートル、幅約500メートル、深さ約150メートルにわたって土砂の崩落が長年続いている。このような土砂の崩落を放置すれば、わが国の国宝ともいうべき美しい富士山は、やがては崩壊、変形するおそれがある。
【0003】
そこで、富士山大沢崩れにおける崩壊を防止するために、床固式低ダム工、渓岸保護工、斜面基礎工、覆式落石防護網工等の試験施工が行われている。なお、本出願人は先行技術文献情報を有しない。
【0004】
【発明が解決しようとする課題】
上記各工法は、いずれも工事に長い期間と膨大な費用を要すると共に、土砂の崩落による作業員の危険を伴うものである。
【0005】
本発明は、上記従来の工法における上述の如き問題を解決し、短期間で安全に且つ少ない費用で施工することができる富士山の崩壊予防方法を提供するものである。
【0006】
【課題を解決するための手段】
上記課題を解決するために、本発明は下記の富士山の崩壊予防方法を提供する。
【0007】
鉄筋コンクリート製の柱体の下端には鉄製の基部を固定し、該基部の下部には尖端を備えさせてなる支持杭を予め多数本製造し、
鉄筋コンクリート製の板状体の上縁に係止部を備えさせてなる防護板を予め多数枚製造し、
ヘリコプターにより空中から前記支持杭を傾斜地に投下して該支持杭の基部を地中に埋入することにより、多数本の支持杭を柱体が地上に突出した状態で該傾斜地に所定の間隔を置いて立設し、
続いて、前記防護板を前記係止部を介してヘリコプターにより吊り下げて該防護板を該傾斜地における前記支持杭の上側にて該支持杭に立て掛けた状態で立設することにより、該傾斜地に多数枚の防護板を連続させた状態で配設して連続防護板を形成し、
該連続防護板を該傾斜地に多数段設け、
上側の連続防護板と下側の連続防護板との間の傾斜地には、ヘリコプターにより空中から別の前記支持杭を投下して該支持杭の基部を地中に埋入することにより、多数本の支持杭を柱体が地上に突出した状態で該傾斜地に立設し、
当該上側の連続防護板と下側の連続防護板との間の傾斜地には、ヘリコプターにより空中から鉄筋を投下し、該鉄筋を当該下側の連続防護板より当該上側の連続防護板に達するまで組み立て、
更に、当該上側の連続防護板と下側の連続防護板との間の傾斜地には、ヘリコプターにより空中から生コンクリートを投下し、当該上側の連続防護板と下側の連続防護板との間に鉄筋コンクリート部を形成することを特徴とする富士山の崩壊予防方法。
【0008】
【作用】
各支持杭は鉄筋コンクリート製の柱体の下端には下部に尖端を備えた鉄製の基部を固定してなるものであり、柱体に比べて基部の重量が大きい。従って、支持杭をヘリコプターにより空中から傾斜地に投下して該支持杭の基部を地中に埋入させ、柱体を地上に突出させた状態で該支持杭を該傾斜地に立設することができる。ヘリコプターは、支持杭の鉄製基部が傾斜地に埋入するに足る高度から傾斜地に支持杭を勢いよく投下し、打ち込む。
【0009】
防護板もヘリコプターにより吊り下げて該防護板を傾斜地における支持杭の上側に該支持杭に立て掛けた状態で立設する。防護板は空中から傾斜地に勢いよく投下するのではなく、傾斜地に静かに降ろし、支持杭に立て掛けるのである。
【0010】
即ち、支持杭を傾斜地に立設する作業も、防護板を該傾斜地に立設する作業も、ヘリコプターにより空中から行うことができる。
【0011】
このように、防護板を傾斜地における支持杭の上側にて該支持杭に立て掛けた状態で立設することにより、傾斜地に多数枚の防護板を連続させた状態で配設して連続防護板を形成し、該連続防護板を傾斜地に多数段設ける。
【0012】
更に、上側の連続防護板と下側の連続防護板との間の傾斜地には、ヘリコプターにより空中から別の前記支持杭を投下して該支持杭の基部を地中に埋入することにより、多数本の支持杭を柱体が地上に突出した状態で該傾斜地に立設する。これらの支持杭は上側の連続防護板と下側の連続防護板との間に形成される鉄筋コンクリート部を傾斜地に固定し、該鉄筋コンクリート部が下方にずれることを防止する。
【0013】
当該上側の連続防護板と下側の連続防護板との間の傾斜地には、ヘリコプターにより空中から鉄筋を投下し、該鉄筋を当該下側の連続防護板より当該上側の連続防護板に達するまで組み立て、当該上側の連続防護板と下側の連続防護板との間の傾斜地には、ヘリコプターにより空中から生コンクリートを投下し、当該上側の連続防護板と下側の連続防護板との間に鉄筋コンクリート部を形成する。即ち、鉄筋コンクリート部は上側の連続防護板と下側の連続防護板とを強固に連結する。
【0014】
即ち、傾斜地に多数段設けられた連続防護板は鉄筋コンクリート部により相互に強固に連結され、土砂の崩落を確実に防止する。
【0015】
【発明の実施の形態】
次に、本発明の実施の形態を添付図面に従って説明する。
【0016】
本発明による富士山の崩壊予防方法は下記の通りである。
【0017】
(1)支持杭の製造(図6、図7参照)
Ype,gn0/e 多数本の支持杭1を予め製造する。各支持杭1は、鉄筋コンクリート製の柱体3の下端3aには鉄製の基部11を固定し、該基部11の下部には尖端15を備えさせてなるものである。
【0018】
各支持杭1は、一例として、鉄筋コンクリート製の柱体3における鉄筋5の下部7を該柱体3の下端3aより露出させ、該鉄筋5の下部7におねじ9を備えさせ、鉄製の基部11には該鉄筋下部7のおねじ9に対応するめねじ13を備えさせ、該基部11には下部に尖端15を備えさせ、該鉄筋下部7のおねじ9を該基部11のめねじ13に螺合させることにより該柱体3の下端3aに該基部11を固定してなるものである。
【0019】
鉄製の基部11の重量は、一例として、支持杭1全体の重量の約2/3とする。また、基部11における尖端15の角度17(図7参照)は一例として約30度とする。
【0020】
なお、支持杭1における柱体3は基部11よりも若干小径に形成することにより、支持杭1の打ち込み時における該柱体3と土砂との摩擦を小さくすることが望ましい。
【0021】
(2)防護板の製造(図8、図9参照)
防護板21を予め多数枚製造する。各防護板21は、鉄筋コンクリート製の板状体23の上縁23aに係止部25を備えさせてなるものである。係止部25は板状体23内の鉄筋27を板状体23の上縁23aより上方に突出させると共に該鉄筋27の上端を例えば環状に形成してなるものとする。この場合、上端に係止部25を備えている鉄筋27は板状体23内において下端を屈曲させて屈曲部29を形成することにより、該防護板21を該係止部25を介してヘリコプターにより吊り下げたときに該鉄筋27が抜け出すことを防止することが望ましい。符号31に示すものは、上端に係止部25を備えた鉄筋27以外の鉄筋である。
【0022】
図9においては、縦方向の鉄筋31と横方向の鉄筋31との交差部33を鉄線34により結束している。
【0023】
(3)支持杭の立設
ヘリコプターにより空中から支持杭1を傾斜地35に投下して該支持杭1の基部11を地中に埋入することにより、多数本の支持杭1を柱体3が地上に突出した状態で該傾斜地35に所定の間隔を置いて立設する。
【0024】
(4)連続防護板の形成
防護板21を係止部25を介してヘリコプターにより吊り下げて該防護板21を傾斜地35における支持杭1の上側(図2における左側)にて該支持杭1に立て掛けた状態で立設することにより、該傾斜地35に多数枚の防護板21を連続させた状態で配設して連続防護板38を形成する。
【0025】
防護板21を係止部25を介してヘリコプターにより吊り下げる際には、一例として、下端にフック部37を有するワイヤ等の吊り下げ紐39をヘリコプターに備えさせ、該吊り下げ紐39のフック部37に防護板21の係止部25を係止する。防護板21を傾斜地35における支持杭1の上側にて支持杭1に立て掛けた後、吊り下げ紐39のフック部37を防護板21の係止部25から引き抜く。
【0026】
防護板21と隣接する防護板21との合わせ目41は、図1に示すように、支持杭1により支持させることが望ましい。
【0027】
(5)連続防護板の多段配設
上記連続防護板38を傾斜地3に上下方向に多数段設ける。
【0028】
(6)上側の連続防護板と下側の連続防護板との間の傾斜地における支持杭の立設
上側の連続防護板38と下側の連続防護板38との間の傾斜地35には、ヘリコプターにより空中から別の前記支持杭1を投下して該支持杭1の基部11を地中に埋入することにより、多数本の支持杭1を柱体3が地上に突出した状態で該傾斜地35に立設する。
【0029】
(7)鉄筋の投下
当該上側の連続防護板38と下側の連続防護板38との間の傾斜地35には、ヘリコプターにより空中から鉄筋51を投下する。
【0030】
(8)鉄筋の組み立て
傾斜地35に投下された鉄筋51を当該下側の連続防護板38より当該上側の連続防護板38に達するまで組み立てる。
【0031】
図4に示す事例においては、鉄筋51と鉄筋51との交差部53を鉄線55により結束している。
【0032】
(9)鉄筋コンクリート部の形成
上側の連続防護板38と下側の連続防護板38との間の傾斜地35には、ヘリコプターにより空中から生コンクリートを投下し、当該上側の連続防護板38と下側の連続防護板38との間に鉄筋コンクリート部57を形成する。図5参照。
【0033】
【発明の効果】
以上説明したように、本発明によれば、支持杭と防護板とを予め製造しておき、現場では支持杭をヘリコプターにより空中から傾斜地に投下立設すると共に防護板をヘリコプターにより吊り下げて支持杭に立て掛けることにより傾斜地に連続防護板を多数段設け、上側の連続防護板と下側の連続防護板との間の傾斜地にヘリコプターにより空中から鉄筋を投下し、該鉄筋を組み立て、上側の連続防護板と下側の連続防護板との間の傾斜地にヘリコプターにより空中から生コンクリートを投下し、当該上側の連続防護板と下側の連続防護板との間に鉄筋コンクリート部を形成するようにしたため、土砂の崩落が確実に防止されると共に工事に要する期間は短縮され、工事に要する費用も軽減される。更に、現場での工事を主としてヘリコプターにより行うようにしたため、土砂の崩落による作業員の危険は減少する。
【図面の簡単な説明】
【図1】連続防護板を示す正面図である。
【図2】連続防護板を複数段設けた状態を示す側面図である。
【図3】同上の平面図である。
【図4】連続防護板と連続防護板との間に鉄筋を組み立てた状態を示す平面図である。
【図5】連続防護板と連続防護板との間に鉄筋コンクリート部を形成した状態を示す側面図である。
【図6】傾斜地に投下される支持杭の断面図である。
【図7】支持杭の一部を示す断面図である。
【図8】吊り下げられた防護板の断面図である。
【図9】防護板における鉄筋を鉄線により結束した状態を示す正面図である。
【図10】防護板の平面断面図である。
【符号の説明】
1 支持杭
3 柱体
3a 下端
5 鉄筋
7 下部
9 おねじ
11 基部
13 めねじ
15 尖端
21 防護板
23 板状体
23a 上縁
25 係止部
27 鉄筋
29 屈曲部
31 鉄筋
33 交差部
34 鉄線
35 傾斜地
37 フック部
38 連続防護板
39 吊り下げ紐
41 合わせ目
51 鉄筋
53 交差部
55 鉄線
57 鉄筋コンクリート部
[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention relates to a method for preventing the collapse of Mt. Fuji, and more particularly to a method for preventing the collapse of Mt. Fuji by preventing the collapse of earth and sand continuously following the Mt.
[0002]
[Prior art]
At Mt. Fuji Osawa Collapse, the collapse of earth and sand has continued for about 2,000 meters in length, about 500 meters in width, and about 150 meters in depth from the summit to a height of about 2,000 meters above sea level for many years. If such landslides are left untouched, the beautiful Mount Fuji, which can be called Japan's national treasure, may eventually collapse or deform.
[0003]
In order to prevent the collapse of Mt. Fuji Osawa collapsing, test construction of floor-fixed low dam works, shore protection works, slope foundation works, overturned rock fall protection net works, etc. is being carried out. The applicant does not have prior art document information.
[0004]
[Problems to be solved by the invention]
Each of the above construction methods requires a long period of time and enormous cost for the construction, and involves a danger for workers due to the collapse of the earth and sand.
[0005]
The present invention solves the above-mentioned problems in the conventional method, and provides a method for preventing collapse of Mt. Fuji that can be performed safely and at low cost in a short period of time.
[0006]
[Means for Solving the Problems]
In order to solve the above problems, the present invention provides the following method for preventing collapse of Mt. Fuji.
[0007]
An iron base is fixed to the lower end of the reinforced concrete column, and a large number of support piles having a pointed tip are manufactured in advance at the bottom of the base,
A large number of protective plates, which are provided with locking portions on the upper edge of a reinforced concrete plate, are manufactured in advance,
By dropping the support pile onto the slope from the air with a helicopter and burying the base of the support pile in the ground, a large number of support piles are spaced from the slope at a predetermined interval in a state where the pillars protrude above the ground. Put it up,
Subsequently, the protection plate is suspended by a helicopter via the locking portion, and the protection plate is erected on the support pile on the inclined land on the upper side of the support pile, thereby standing on the inclined land. A large number of protective plates are arranged in a continuous state to form a continuous protective plate,
A large number of the continuous protective plates are provided on the slope,
On a slope between the upper continuous protective plate and the lower continuous protective plate, the helicopter drops another support pile from the air and embeds the base of the support pile into the ground, thereby forming a large number of piles. Standing on the slope with the pillars protruding above the ground,
On a slope between the upper continuous protective plate and the lower continuous protective plate, a reinforcing bar is dropped from the air by a helicopter until the reinforcing bar reaches the upper continuous protective plate from the lower continuous protective plate. assembly,
Furthermore, on a slope between the upper continuous protective plate and the lower continuous protective plate, a fresh concrete is dropped from the air by a helicopter between the upper continuous protective plate and the lower continuous protective plate. A method for preventing collapse of Mt. Fuji, comprising forming a reinforced concrete part.
[0008]
[Action]
Each support pile is formed by fixing an iron base provided with a pointed tip at the lower end of a reinforced concrete pillar, and the weight of the base is larger than that of the pillar. Therefore, the support pile can be dropped from the air onto the slope by a helicopter, the base of the support pile can be buried in the ground, and the support pile can be erected on the slope with the pillar protruding above the ground. . The helicopter will drop and hammer the support stake into the sloping ground from an altitude sufficient for the steel base of the supporting stake to be embedded in the sloping ground.
[0009]
The protection plate is also suspended by a helicopter, and the protection plate is erected on the support pile on the sloped land with the protection plate leaning on the support pile. Instead of dropping vigorously onto the slope from the air, the guard plate is gently lowered onto the slope and leans against the support pile.
[0010]
That is, both the work of erecting the support pile on the slope and the work of erecting the protection plate on the slope can be performed from the air by the helicopter.
[0011]
In this way, by arranging the protection plate on the support pile on the sloped land in a state of leaning on the support pile, the continuous protection plate is arranged by arranging a large number of protection plates on the sloped land in a continuous state. The continuous protection plate is provided on an inclined ground in multiple steps.
[0012]
Further, on a slope between the upper continuous protective plate and the lower continuous protective plate, by dropping another support pile from the air by a helicopter and burying the base of the support pile in the ground, A number of support piles are erected on the slope with the pillars protruding above the ground. These support piles fix the reinforced concrete portion formed between the upper continuous protective plate and the lower continuous protective plate on the slope, and prevent the reinforced concrete portion from shifting downward.
[0013]
On a slope between the upper continuous protective plate and the lower continuous protective plate, a reinforcing bar is dropped from the air by a helicopter until the reinforcing bar reaches the upper continuous protective plate from the lower continuous protective plate. Assembling, dropping ready-mixed concrete from the air by helicopter on the slope between the upper continuous protective plate and the lower continuous protective plate, and between the upper continuous protective plate and the lower continuous protective plate Form a reinforced concrete part. That is, the reinforced concrete part firmly connects the upper continuous protective plate and the lower continuous protective plate.
[0014]
That is, the continuous protective plates provided on the sloping ground in a number of steps are firmly connected to each other by the reinforced concrete portion, thereby reliably preventing the collapse of the earth and sand.
[0015]
BEST MODE FOR CARRYING OUT THE INVENTION
Next, embodiments of the present invention will be described with reference to the accompanying drawings.
[0016]
The method for preventing the collapse of Mt. Fuji according to the present invention is as follows.
[0017]
(1) Manufacture of support pile (see FIGS. 6 and 7)
Ype, gn0 / e Many support piles 1 are manufactured in advance. Each support pile 1 has an iron base 11 fixed to a lower end 3a of a reinforced concrete column 3 and a point 15 provided at a lower portion of the base 11.
[0018]
As an example, each support pile 1 exposes the lower part 7 of the reinforcing bar 5 in the reinforced concrete column 3 from the lower end 3 a of the column 3, has the lower part 7 of the reinforcing bar 5 provided with a screw 9, and 11 is provided with a female screw 13 corresponding to the male screw 9 of the lower reinforcing bar 7, the base 11 is provided with a pointed tip 15 at the lower part, and the male screw 9 of the lower reinforcing bar 7 is attached to the female screw 13 of the base 11. The base 11 is fixed to the lower end 3a of the column 3 by screwing.
[0019]
The weight of the iron base 11 is, for example, about / of the weight of the entire support pile 1. The angle 17 (see FIG. 7) of the point 15 at the base 11 is, for example, about 30 degrees.
[0020]
It is desirable that the column 3 in the support pile 1 be formed to have a slightly smaller diameter than the base 11 so as to reduce the friction between the column 3 and the earth and sand when the support pile 1 is driven.
[0021]
(2) Production of protective plate (see FIGS. 8 and 9)
A large number of protective plates 21 are manufactured in advance. Each protection plate 21 is provided with a locking portion 25 on the upper edge 23a of the plate-like body 23 made of reinforced concrete. The locking portion 25 is configured such that the reinforcing bar 27 in the plate-like body 23 projects upward from the upper edge 23a of the plate-like body 23 and that the upper end of the reinforcing bar 27 is formed, for example, in an annular shape. In this case, the reinforcing bar 27 having the locking portion 25 at the upper end bends the lower end in the plate-like body 23 to form a bent portion 29, so that the protection plate 21 is connected to the helicopter through the locking portion 25. It is desirable to prevent the rebar 27 from slipping out when suspended. Reference numeral 31 denotes a reinforcing bar other than the reinforcing bar 27 having the locking portion 25 at the upper end.
[0022]
In FIG. 9, an intersection 33 between the vertical reinforcing bar 31 and the horizontal reinforcing bar 31 is bound by an iron wire 34.
[0023]
(3) The support pile 1 is dropped from the air onto the slope 35 by the helicopter standing upright, and the base 11 of the support pile 1 is buried in the ground. It is erected at a predetermined interval on the slope 35 while projecting above the ground.
[0024]
(4) Formation of a continuous protective plate The protective plate 21 is suspended by a helicopter via the locking portion 25, and the protective plate 21 is attached to the support pile 1 above the support pile 1 on the slope 35 (left side in FIG. 2). By standing upright, a large number of protection plates 21 are arranged in a continuous manner on the slope 35 to form a continuous protection plate 38.
[0025]
When the protection plate 21 is hung by a helicopter via the locking portion 25, as an example, a hanging string 39 such as a wire having a hook portion 37 at the lower end is provided on the helicopter, and the hook portion of the hanging string 39 is provided. The locking portion 25 of the protection plate 21 is locked to 37. After the protection plate 21 is leaned on the support pile 1 above the support pile 1 on the slope 35, the hook portion 37 of the hanging string 39 is pulled out from the locking portion 25 of the protection plate 21.
[0026]
It is desirable that the joint 41 between the protective plate 21 and the adjacent protective plate 21 be supported by the support pile 1 as shown in FIG.
[0027]
(5) Multi-stage Arrangement of Continuous Protective Plates The continuous protective plate 38 is provided on the sloping ground 3 in multiple stages in the vertical direction.
[0028]
(6) Standing of the support pile on the slope between the upper continuous protection board and the lower continuous protection board The helicopter is installed on the slope 35 between the upper continuous protection board 38 and the lower continuous protection board 38. By dropping another support pile 1 from the air and burying the base 11 of the support pile 1 in the ground, a large number of support piles 1 can be placed on the sloped land 35 with the pillars 3 protruding above the ground. Erected in
[0029]
(7) Dropping of a reinforcing bar A reinforcing bar 51 is dropped from the air by a helicopter on the slope 35 between the upper continuous protective plate 38 and the lower continuous protective plate 38.
[0030]
(8) Assembling the reinforcing bar The reinforcing bar 51 dropped on the slope 35 is assembled from the lower continuous protective plate 38 to the upper continuous protective plate 38.
[0031]
In the example shown in FIG. 4, the intersection 53 between the reinforcing bars 51 and the reinforcing bars 51 is bound by the iron wire 55.
[0032]
(9) Formation of Reinforced Concrete Section On a slope 35 between the upper continuous protective plate 38 and the lower continuous protective plate 38, a helicopter drops fresh concrete from the air, and the upper continuous protective plate 38 and the lower side. A reinforced concrete portion 57 is formed between the continuous protective plate 38 and the continuous protective plate 38. See FIG.
[0033]
【The invention's effect】
As described above, according to the present invention, the support pile and the protection plate are manufactured in advance, and the support pile is dropped and erected from the air on a slope by a helicopter at the site, and the protection plate is suspended by the helicopter and supported. A plurality of continuous protective plates are provided on the slope by leaning on the pile, and a reinforcing bar is dropped from the air by a helicopter on the slope between the upper continuous protective plate and the lower continuous protective plate, and the reinforcing bars are assembled. Because helicopter dropped fresh concrete from the air on the slope between the protective plate and the lower continuous protective plate, so that a reinforced concrete part was formed between the upper continuous protective plate and the lower continuous protective plate. In addition, the collapse of earth and sand is reliably prevented, the time required for construction is shortened, and the cost required for construction is reduced. Furthermore, since the construction at the site is mainly performed by a helicopter, the danger to workers due to the collapse of the earth and sand is reduced.
[Brief description of the drawings]
FIG. 1 is a front view showing a continuous protection plate.
FIG. 2 is a side view showing a state where a plurality of continuous protective plates are provided.
FIG. 3 is a plan view of the same.
FIG. 4 is a plan view showing a state where a reinforcing bar is assembled between the continuous protective plates.
FIG. 5 is a side view showing a state in which a reinforced concrete portion is formed between the continuous protective plates.
FIG. 6 is a sectional view of a support pile dropped on a slope.
FIG. 7 is a sectional view showing a part of the support pile.
FIG. 8 is a sectional view of a suspended protection plate.
FIG. 9 is a front view showing a state in which reinforcing bars of the protective plate are bound by iron wires.
FIG. 10 is a cross-sectional plan view of the protection plate.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Support pile 3 Column 3a Lower end 5 Rebar 7 Bottom 9 Male thread 11 Base 13 Female thread 15 Point 21 Protective plate 23 Plate 23a Upper edge 25 Locking part 27 Reinforcing rod 29 Bent part 31 Reinforcing rod 33 Intersection 34 Iron wire 35 Inclined ground 37 Hook part 38 Continuous protective plate 39 Hanging string 41 Seam 51 Reinforcement 53 Intersection 55 Iron wire 57 Reinforced concrete part

Claims (1)

  1. 鉄筋コンクリート製の柱体の下端には鉄製の基部を固定し、該基部の下部には尖端を備えさせてなる支持杭を予め多数本製造し、
    鉄筋コンクリート製の板状体の上縁に係止部を備えさせてなる防護板を予め多数枚製造し、
    ヘリコプターにより空中から前記支持杭を傾斜地に投下して該支持杭の基部を地中に埋入することにより、多数本の支持杭を柱体が地上に突出した状態で該傾斜地に所定の間隔を置いて立設し、
    続いて、前記防護板を前記係止部を介してヘリコプターにより吊り下げて該防護板を該傾斜地における前記支持杭の上側にて該支持杭に立て掛けた状態で立設することにより、該傾斜地に多数枚の防護板を連続させた状態で配設して連続防護板を形成し、
    該連続防護板を該傾斜地に多数段設け、
    上側の連続防護板と下側の連続防護板との間の傾斜地には、ヘリコプターにより空中から別の前記支持杭を投下して該支持杭の基部を地中に埋入することにより、多数本の支持杭を柱体が地上に突出した状態で該傾斜地に立設し、
    当該上側の連続防護板と下側の連続防護板との間の傾斜地には、ヘリコプターにより空中から鉄筋を投下し、該鉄筋を当該下側の連続防護板より当該上側の連続防護板に達するまで組み立て、
    更に、当該上側の連続防護板と下側の連続防護板との間の傾斜地には、ヘリコプターにより空中から生コンクリートを投下し、当該上側の連続防護板と下側の連続防護板との間に鉄筋コンクリート部を形成することを特徴とする富士山の崩壊予防方法。
    An iron base is fixed to the lower end of the reinforced concrete column, and a large number of support piles having a pointed tip are manufactured in advance at the bottom of the base,
    A large number of protective plates, which are provided with locking portions on the upper edge of a reinforced concrete plate, are manufactured in advance,
    By dropping the support pile onto the slope from the air with a helicopter and burying the base of the support pile in the ground, a large number of support piles are spaced from the slope at a predetermined interval in a state where the pillars protrude above the ground. Put it up,
    Subsequently, the protection plate is suspended by a helicopter via the locking portion, and the protection plate is erected on the support pile on the inclined land on the upper side of the support pile, thereby standing on the inclined land. A large number of protective plates are arranged in a continuous state to form a continuous protective plate,
    A large number of the continuous protective plates are provided on the slope,
    On a slope between the upper continuous protective plate and the lower continuous protective plate, the helicopter drops another support pile from the air and embeds the base of the support pile into the ground, thereby forming a large number of piles. Standing on the slope with the pillars protruding above the ground,
    On a slope between the upper continuous protective plate and the lower continuous protective plate, a reinforcing bar is dropped from the air by a helicopter until the reinforcing bar reaches the upper continuous protective plate from the lower continuous protective plate. assembly,
    Furthermore, on a slope between the upper continuous protective plate and the lower continuous protective plate, a fresh concrete is dropped from the air by a helicopter between the upper continuous protective plate and the lower continuous protective plate. A method for preventing collapse of Mt. Fuji, comprising forming a reinforced concrete part.
JP2002333227A 2002-11-18 2002-11-18 How to prevent the collapse of Mt. Fuji Expired - Fee Related JP3723541B2 (en)

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Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2011122385A (en) * 2009-12-14 2011-06-23 Sadayuki Amiya Pile driving method
JP2017227109A (en) * 2016-06-21 2017-12-28 戸田建設株式会社 Sound insulation structure body
CN110468854A (en) * 2019-07-16 2019-11-19 重庆大学 A kind of quick emergence control method in landslide

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2011122385A (en) * 2009-12-14 2011-06-23 Sadayuki Amiya Pile driving method
JP2017227109A (en) * 2016-06-21 2017-12-28 戸田建設株式会社 Sound insulation structure body
CN110468854A (en) * 2019-07-16 2019-11-19 重庆大学 A kind of quick emergence control method in landslide

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