JPH11100816A - Slope landslide preventing construction method - Google Patents
Slope landslide preventing construction methodInfo
- Publication number
- JPH11100816A JPH11100816A JP27949297A JP27949297A JPH11100816A JP H11100816 A JPH11100816 A JP H11100816A JP 27949297 A JP27949297 A JP 27949297A JP 27949297 A JP27949297 A JP 27949297A JP H11100816 A JPH11100816 A JP H11100816A
- Authority
- JP
- Japan
- Prior art keywords
- slope
- rock
- tensile
- holes
- bed
- 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
Landscapes
- Pit Excavations, Shoring, Fill Or Stabilisation Of Slopes (AREA)
- Devices Affording Protection Of Roads Or Walls For Sound Insulation (AREA)
Abstract
Description
【０００１】[0001]
【発明の属する技術分野】この発明は斜面の岩盤の崩落
を防止する工法に関するものであり、特に崩落の危険が
せまっている斜面でも有効な斜面崩落防止工法に関する
ものである。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for preventing a rock from falling down on a slope, and more particularly to a method for preventing a slope from falling down, which is effective even on a slope where the danger of the fall is reduced.
【０００２】[0002]
【従来の技術】山岳地や海沿いなどの制限された地形
に、道路を敷設したり建物を建築することがある。この
ような地形では、道路や建物の上には切り立った崖など
の斜面が存在することもある。近年、このような地形で
の斜面の崩落が極めて大きな問題となっており、その対
策が必要となっている。このような斜面の崩落を防止す
る工法として、出願人は既に特公平２−４２９７０号公
報に記載した発明を開示している。同発明は、斜面に沿
ってＰＣ鋼材を伸ばし、その両端を斜面の上と下に埋設
して固定し、斜面をＰＣ鋼材によって押えるようにして
崩落を防ぐものである。2. Description of the Related Art Roads and buildings are sometimes constructed on restricted terrain such as mountainous areas and along the sea. In such terrain, slopes such as steep cliffs may exist on roads and buildings. In recent years, the collapse of slopes on such terrain has become a very serious problem, and measures have been required. As a method of preventing such a slope from collapsing, the applicant has already disclosed the invention described in Japanese Patent Publication No. 2-42970. According to the invention, a PC steel material is stretched along a slope, and both ends are buried and fixed above and below the slope, and the slope is pressed by the PC steel to prevent collapse.
【０００３】[0003]
【発明が解決しようとする課題】前記の先願の発明は、
ＰＣ鋼材を用いて、そのＰＣ鋼材のみによって地山を押
えようとするものであるが、例えＰＣ鋼材を網のように
地山の上に張り巡らしても、ＰＣ鋼材間の隙間を押える
ことは出来ず、地山全体を押えるには充分でなかった。
また地山を全て覆うような構造物を構築することは施工
が大がかりになってしまい、施工が極めて困難なものと
なってしまう。The above-mentioned invention of the prior application is:
It is intended to use PC steel to hold down the ground with only the PC steel. However, even if the PC steel is stretched over the ground like a net, the gap between the PC steels cannot be suppressed. It was not enough to hold down the whole ground.
In addition, constructing a structure that covers the entire ground requires a large amount of construction, which is extremely difficult.
【０００４】更に、このような崩落危険を有する地形で
の課題は、崩落を速やかに防止することであるが、それ
とともに、崩落の危険性がある岩盤の上では作業が不可
能であり、安定した地盤の上でのみ作業を行なえること
が必須条件となる。前記した先願の発明では、ＰＣ鋼材
のほぼ全長を斜面の表面に沿わすために、崩落の危険性
のある岩盤の上での作業がどうしても大がかりなものと
なる。また、現在使用されている道路などの通交を出来
る限り制限せずに施工を完了することが望まれる。[0004] Furthermore, a problem in such a terrain having a danger of collapsing is to prevent the collapsing quickly, but at the same time, it is impossible to work on a rock mass which has a danger of collapsing, and the stability is low. It is an essential condition that work can be performed only on the ground that has been set. In the above-mentioned invention of the prior application, since almost the entire length of the PC steel material is along the surface of the slope, the work on the bedrock that is at risk of collapse is inevitably large. In addition, it is desired to complete the construction without restricting the traffic of the roads currently used as much as possible.
【０００５】この発明は、簡易な施工で地山全体を押え
ることが可能であるとともに、崩落危険岩盤上のでの作
業も不要であって、交通遮断などの必要のない斜面崩落
防止工法を提供することを目的とする。[0005] The present invention provides a method for preventing a slope from collapsing, which is capable of holding down the entire ground with simple construction, and also does not require work on rocks at risk of collapse, and does not require traffic interruption or the like. The purpose is to:
【０００６】[0006]
【課題を解決するための手段】この発明にかかる斜面崩
落防止工法は、引張材を斜面の安定岩盤上から崩落危険
岩盤に向けて貫通させ、この引張材を貫通させた岩盤そ
のものを大きな受圧構造物として機能させることによ
り、斜面の地山全体を押えて上記の目的を達成するもの
である。The method for preventing a slope from falling according to the present invention is to penetrate a tensile material from a stable rock on the slope to a rock at risk of collapse, and to make the rock itself through which the tensile material penetrates into a large pressure receiving structure. By functioning as an object, the above-mentioned object is achieved by pressing the entire ground on the slope.
【０００７】[0007]
【発明の実施の形態】この発明にかかる斜面の崩落防止
工法は、斜面の安定岩盤上から、斜面の崩落危険岩盤に
向って、少なくとも一対の複数の削孔を形成する。ここ
で述べる安定岩盤とは、地形や岩盤の性質上から崩落の
可能性がほぼないと認められる岩盤であり、崩落危険岩
盤とは現実にクラックなどが生じていることにより将来
崩落の危険がある岩盤部分のこともあるし、地形や岩盤
の性質上、クラックなどが発生していなくても将来的に
崩落の発生の可能性が危惧される岩盤も含める。削孔は
斜面正面まで貫通させる。斜面正面とは実際は崩落危険
岩盤の表面となる。BEST MODE FOR CARRYING OUT THE INVENTION In the slope collapse prevention method according to the present invention, at least one pair of a plurality of holes is formed from a stable rock mass on a slope toward a rock mass at danger of collapse. The stable rock mentioned here is a rock that is considered to have almost no possibility of collapse due to the topography and the properties of the rock.The collapse-risk rock has the danger of future collapse due to the actual occurrence of cracks, etc. It may be a bedrock part, and also includes a bedrock that is likely to collapse in the future even if no cracks occur due to the topography and the properties of the bedrock. The drill hole is made to penetrate to the front of the slope. The front of the slope is actually the surface of the danger rock mass.
【０００８】掘削した複数の削孔のいずれかの中に、安
定岩盤から引張材を通す。引張材としてはＰＣ鋼より線
やＰＣ鋼線の他、合成樹脂繊維や炭素繊維などからなる
ものや、高強度鉄筋なども使用できる。ＰＣ鋼材の場合
は、複数本を束にして合成樹脂製などのシースの中に通
して使用するものである。引張材は一端部を安定岩盤の
上からいずれかの削孔に挿入して斜面の正面から抜け出
させる。そして、折返してその他端部を斜面の正面に開
口した別の削孔の中に挿入する。つまりは、中間部を折
返して、Ｕ字状となった引張材の両端部を別の削孔の中
へそれぞれ挿入して、両端を安定岩盤上に至らせるもの
である。削孔の中で引張材はアンボンドとしておくため
に、ＰＣ鋼材などの引張材は合成樹脂製のストレートシ
ースの中に通しておく。斜面上方の安定岩盤上で、引張
材の両端を引っ張ってプレストレス力を与えて定着す
る。引張材をＵ字状にして抱え込むようにした岩盤は、
それ自身が大きな受圧構造物となり、プレストレス力に
よってその下の崩落危険岩盤を押えて、崩落を防止す
る。[0008] A tensile material is passed from the stable rock into one of the plurality of drilled holes. As the tensile member, in addition to a PC steel strand or a PC steel wire, a wire made of synthetic resin fiber, carbon fiber, or the like, a high-strength rebar, or the like can be used. In the case of a PC steel material, a plurality of them are bundled and used through a sheath made of synthetic resin or the like. One end of the tensile material is inserted into one of the holes from the top of the stable rock to escape from the front of the slope. Then, it is folded back and the other end is inserted into another hole drilled at the front of the slope. In other words, the intermediate portion is turned over, and both ends of the U-shaped tensile member are inserted into different holes, respectively, so that both ends reach the stable rock. In order to keep the tensile material unbonded in the hole, the tensile material such as a PC steel material is passed through a straight sheath made of synthetic resin. On the stable rock above the slope, both ends of the tensile material are pulled to give a prestressing force and settle. The bedrock that holds the tensile material in a U-shape,
The structure itself becomes a large pressure receiving structure, and the prestressing force holds down the collapse danger bedrock to prevent the collapse.
【０００９】このようにして引張材にプレストレス力を
与えて岩盤を押えるのであるが、実際は多数本の引張材
を場所を変えて安定岩盤上から崩落危険岩盤に貫通させ
て折返して定着し、また互いに斜面上や岩盤内で交差さ
せ、網のように縦横に引張材を網羅することにより、多
数本の引張材が一体となって斜面を押えるようにするこ
ともある。In this way, the prestressing force is applied to the tensile material to press the rock, but in reality, a large number of tensile materials are changed and the penetrating rock is pierced from the stable rock to the danger rock, and the rock is fixed. In addition, by intersecting each other on the slope or in the rock, and covering the tensile members vertically and horizontally like a net, a large number of tensile members may be able to press the slope integrally.
【００１０】安定岩盤上からではなく、安定岩盤そのも
のに竪孔を掘削して形成し、この竪孔の中から斜面の正
面に複数の削孔を形成し、この竪孔内からいずれかの削
孔内に引張材の一端部を通し、前記と同様に中間部を斜
面正面で折返し、他端部を別個の削孔内に挿入して竪孔
内に至らせる。こうして突出した両端を竪孔の中で緊張
して定着する。安定岩盤の上からだけでは、斜面正面の
下方にて折返す場合、どうしても引張材の角度が大きく
成り過ぎることがある。しかし、このような竪孔から削
孔を掘削する場合は、竪孔からほぼ水平近くで斜面まで
引張材を伸ばすことになると、引張材の長さが長くなり
過ぎず、また崩落危険岩盤を大きな受圧構造物として竪
孔から抱え込むように良好に安定岩盤の方へ引き寄せる
ことが可能である。A pit is excavated and formed not in the stable rock but in the stable rock itself, and a plurality of drill holes are formed in front of the slope from among the pits. One end of the tensile material is passed through the hole, the intermediate portion is folded back in front of the slope in the same manner as described above, and the other end is inserted into a separate hole to reach the inside of the vertical hole. The protruding ends are fixed in the pit by tension. The angle of the tension member may be too large if it is folded under the front of the slope only from the stable rock. However, when drilling a hole from such a pit, if the tensile material is to be extended from the pit to almost the horizontal and to the slope, the length of the tensile material will not be too long, and the collapse danger As a pressure receiving structure, it is possible to favorably pull the rock toward the stable rock so that it is held from the pit.
【００１１】斜面の崩落危険岩盤表面から、この崩落危
険岩盤を貫通して安定岩盤にまで至る複数の削孔を形成
し、これに引張材の両端部を挿入して定着することもあ
る。この場合、引張材は削孔の中で定着するために、Ｐ
Ｃ鋼材の場合は、少なくとも両端部は、鋼製や合成樹脂
製であって周囲に凹凸のある異形シースの中に挿入して
おく必要がある。この引張材の両端部を別々の削孔の中
に挿入して、先端を安定岩盤まで至らせ、削孔の中にグ
ラウト材を注入して定着するものである。斜面正面に沿
わす中間部は合成樹脂などのストレートシースの中に通
しておいてもよい。斜面正面に表出する中間部には吹き
付けコンクリートなどを施してもよい。このような構成
の場合は、引張材にはプレストレス力を与えず、斜面正
面からの施工で完了する。In some cases, a plurality of drilling holes are formed from the surface of the slope-risk rock mass to the stable rock mass through the collapse-risk rock mass, and both ends of the tensile material are inserted into the holes and fixed. In this case, since the tensile material is fixed in the borehole, P
In the case of a C steel material, at least both ends must be inserted into a deformed sheath made of steel or synthetic resin and having irregularities around it. Both ends of the tensile material are inserted into separate drill holes, the ends reach the stable rock, and grout is injected into the drill holes and fixed. The intermediate portion along the front of the slope may be passed through a straight sheath such as a synthetic resin. Sprayed concrete or the like may be applied to the intermediate portion exposed on the front of the slope. In the case of such a configuration, the prestressing force is not applied to the tensile member, and the construction is completed from the front of the slope.
【００１２】[0012]
【実施例】以下、図に示す実施例に基づきこの発明を詳
細に説明する。図１及び図２において１は崩落が生ずる
可能性のある岩盤であって、滑り面ａを境に崩落する可
能性があるものである。実際、可能性のある滑り面ａが
いくつも斜面に存在している。この滑り面ａよりも奥
の、崩落の可能性の極めて少ない安定岩盤２の上から、
斜面正面に向けて複数の削孔３を形成してある。この削
孔３のうちのいずれかの削孔３に、安定岩盤２上から、
引張材４の一端を挿入し、斜面正面に貫通させてある。
引張材４としては、合成樹脂製のストレートシースの中
に通したＰＣ鋼より線を使用している。斜面正面から出
た引張材４を折返し、別の削孔３の中に斜面正面から挿
入する。安定岩盤２の上まで至らせ、削孔３・３から出
た引張材４であるＰＣ鋼より線の両端をジャッキによっ
て引張り、安定岩盤２上でプレストレス力を与える。引
張材４をＵ字状に折返して抱えるようにした岩盤そのも
のを受圧構造物として機能させ、その下の崩落危険岩盤
１を押える。その後、そのＰＣ鋼より線の両端をアンカ
ーヘッド５・５にくさびによって定着する。DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described below in detail based on an embodiment shown in the drawings. In FIG. 1 and FIG. 2, reference numeral 1 denotes a rock mass which is likely to collapse, and which may collapse at the sliding surface a. In fact, there are several possible sliding surfaces a on the slope. From above the stable rock 2 that is extremely unlikely to collapse,
A plurality of holes 3 are formed toward the front of the slope. From any of the stable rocks 2,
One end of the tensile member 4 is inserted and penetrated to the front of the slope.
As the tension member 4, a PC steel stranded wire passed through a straight sheath made of synthetic resin is used. The tension member 4 coming out of the front of the slope is turned up and inserted into another hole 3 from the front of the slope. The PC steel stranded wire, which is the tensile material 4 coming out of the drilled holes 3, is pulled by jacks to reach both ends of the stable rock 2, and a prestress force is applied on the stable rock 2. The rock itself in which the tension member 4 is folded back in a U-shape is made to function as a pressure receiving structure, and the rock danger rock 1 under the rock is pressed. Then, both ends of the PC steel strand are fixed to the anchor heads 5.5 by wedges.
【００１３】図２に示すのは、斜面を正面から見た図で
あるが、多数本の引張材４を使用して斜面正面で中間部
をほぼ水平にして折返して、多数の引張材４の崩落危険
岩盤を１抱え込むようにして、全体で崩落危険岩盤１を
受圧構造物として機能させている。図３に示すのは、引
張材４と斜面の間にコンクリート構造物を構築して、そ
の隙間を埋め、斜面と密接に引張材４を配設した状態を
示すものである。斜面に左右にエキスパンドメタルや金
網からなる型枠１０・１０を設置し、コンクリート１１
を打設してある。図４に示すのは、引張材４を内部に埋
設したまま斜面との間にコンクリート構造物を構築した
例である。FIG. 2 is a view of the slope viewed from the front. The middle part of the slope is turned almost horizontally at the front of the slope by using a plurality of tension members 4, and the plurality of tension members 4 are folded. The collapse danger bedrock 1 functions as a pressure receiving structure as a whole by holding one collapse danger bedrock. FIG. 3 shows a state in which a concrete structure is constructed between the tension member 4 and the slope, the gap is filled, and the tension member 4 is disposed closely to the slope. Formwork 10 made of expanded metal or wire mesh is installed on the left and right on the slope, and concrete 11
Has been cast. FIG. 4 shows an example in which a concrete structure is constructed between a tensile member 4 and a slope while the tensile member 4 is buried inside.
【００１４】図５に示すのは、安定岩盤２上から、ほぼ
垂直に竪孔６を形成した場合であって、この竪孔６の中
から、斜面正面にむかって複数の削孔３を貫通させたも
のである。この複数の削孔３のいずれかひとつに引張材
４を通し、斜面正面で折返して別の削孔３内に挿入して
竪孔６の中まで至らせる。この引張材４の両端を竪孔６
の中で緊張してアンカーヘッド５・５に定着する。実施
例では多数本の引張材４を竪孔６から斜面正面まで通し
て定着してある。削孔３・３は安定岩盤２の竪孔６から
崩落危険岩盤１まで貫通しており、これに通した引張材
４を緊張することにより崩落危険岩盤１が大きな受圧構
造物として機能し、その下の岩盤を安定岩盤２へ押える
ことになる。竪孔６は単数でもよいが、図６に示すの
は、左右に離れて竪孔６・６を掘削し、この一方の竪孔
６から掘削した削孔３に挿入して斜面表面に出した引張
材４を、他方の竪孔６から掘削した削孔３に挿入して竪
孔６まで至らせてある。また、多数本の斜面正面に表出
した引張材４を、互いに交差させるようにして、斜面の
地山全体を一体に網羅するようにしたものである。FIG. 5 shows a case in which a vertical hole 6 is formed almost vertically from the stable rock 2, and a plurality of drill holes 3 penetrate from the vertical hole 6 toward the front of the slope. It was made. The tensile material 4 is passed through any one of the plurality of drill holes 3, turned over at the front of the slope, inserted into another drill hole 3, and reaches the inside of the vertical hole 6. The two ends of the tension member 4 are connected to the pit 6
Tensions in the head and settle on anchor head 5.5. In the embodiment, a large number of tensile members 4 are fixed from the vertical hole 6 to the front of the slope. The drilled holes 3 penetrate from the vertical hole 6 of the stable rock 2 to the collapse danger rock 1, and the tension danger material 4 passed through the drilled hole 3 functions as a large pressure receiving structure by tensioning the tension member 4. The lower bedrock is pressed to the stable bedrock 2. The pit 6 may be singular, but FIG. 6 shows that the pits 6 are excavated left and right, inserted into the drilled hole 3 excavated from one of the pits 6, and put out on the slope surface. The tensile member 4 is inserted into the drilled hole 3 excavated from the other vertical hole 6 to reach the vertical hole 6. Further, a plurality of tensile members 4 exposed on the front side of the slope are made to intersect with each other to integrally cover the entire ground on the slope.
【００１５】図７に示すのは、斜面正面から安定岩盤２
まで至る複数の削孔７・７を掘削し、この中に引張材４
の両端部を挿入したものである。引張材４としては、複
数本のＰＣ鋼線を束にして、ステンレス製の異形シース
の中に全長を挿入したものを使用してる。この引張材４
の両端部を削孔７・７に挿入してある。この異形シース
内と削孔７・７内にグラウト材８を注入して、引張材４
の両端部をグラウト材８の付着力にて削孔７・７内に定
着してある。斜面の正面に表出した引張材４の中間部に
は吹き付けコンクリート９を吹き付けて保護をしてい
る。このような施工であれば、引張材４の緊張の必要は
なく、斜面正面から削孔７・７を掘削して引張材を挿入
して定着するだけで、崩落危険岩盤１を安定岩盤２に一
体に固定できる。FIG. 7 shows the stable rock 2 from the front of the slope.
Drilling a plurality of drilling holes 7
Are inserted at both ends. As the tensile member 4, a bundle of a plurality of PC steel wires and the entire length inserted into a deformed sheath made of stainless steel is used. This tensile material 4
Are inserted into the holes 7. The grout material 8 is injected into the deformed sheath and the drilled holes 7 and 7 and the tensile material 4
Are fixed in the holes 7 by the adhesive force of the grout material 8. Sprayed concrete 9 is sprayed on the intermediate portion of the tensile member 4 exposed on the front of the slope to protect it. In such a construction, there is no need to tension the tension member 4, and only the drilling holes 7, 7 are excavated from the front of the slope and the tension member is inserted and fixed, and the collapse-risk rock mass 1 becomes stable rock mass 2. Can be fixed together.
【００１６】図９に示すのは、ひとつの削孔７の中に、
別個の引張材４の一端部を複数挿入した例である。各引
張材４の中間部は斜面表面の必要箇所に沿わせて斜面表
面に連続させて伸ばし、他端部は任意の別の削孔７に挿
入して定着すればよい。図１０に示すのは、ひとつの削
孔７に三本の引張材４の一端部を挿入した断面図であ
る。このように、ひとつの削孔に複数の引張材４の端部
を挿入するのは、図１〜図６に示す実施例へも応用する
ことも勿論可能である。FIG. 9 shows that one hole 7 has
This is an example in which a plurality of one end portions of separate tensile members 4 are inserted. The intermediate portion of each tension member 4 may be extended continuously along the slope surface along a required portion of the slope surface, and the other end may be inserted and fixed in any other hole 7. FIG. 10 is a cross-sectional view in which one end of three tensile members 4 is inserted into one hole 7. The insertion of the ends of the plurality of tensile members 4 into one hole as described above can of course be applied to the embodiment shown in FIGS.
【００１７】[0017]
【発明の効果】この発明は以上のような構成により、以
下の効果を得ることができる。 地山に引張材を貫通させるだけでに、地山の岩盤自体
を大きな受圧構造物として機能させ、その大きな受圧構
造物によって地山全体を大きく押えることが可能で、著
しく容易な施工で、斜面の地山全体の崩落を防止でき
る。 安定岩盤から正面に向けて複数の引張材を通し、引張
材を崩落危険岩盤にＵ字状にかけるようにしてプレスト
レス力を与えるため、崩落の可能性のある危険な岩盤上
での作業は極めて少なく、極めて安全に施工が行なえ
る。 安定岩盤に竪孔を形成し、この竪孔から削孔を形成し
て引張材を通すことにより、引張材に大きな角度がつか
ず、崩落危険岩盤を効率的に安定岩盤の方へ引き寄せる
ことができる。 斜面正面から複数の削孔を掘削し、この削孔にＵ字状
に折返した引張材の両端を挿入して定着するだけで、崩
落危険岩盤を大きな受圧構造物として機能させることが
でき、施工は著しく容易である。 斜面下のでの作業は一切必要なく、斜面下の道路の交
通などを止める必要がなく、効率の良い施工が行なえ
る。 引張材は、それだけで何百トンの荷重を支えることが
でき、この引張材多数本を斜面に縦横に掛けることによ
り、何千トンもの岩盤の荷重を支えて、崩落を防ぐ。 斜面下の作業や構造物の設置の必要がなく、既設の道
路や建物などの建築限界を犯さない。According to the present invention, the following effects can be obtained by the above configuration. Just by letting the tensile material penetrate the ground, the ground rock itself can function as a large pressure receiving structure, and the large pressure receiving structure can greatly hold down the entire ground, making it extremely easy to construct the slope. Of the entire mountain can be prevented. Passing a plurality of tension members from the stable rock toward the front and applying a prestressing force by applying the tension members in a U-shape to the collapse danger bedrock, work on dangerous danger rock that may collapse Extremely few and extremely safe construction. By forming a pit in the stable rock, forming a drilled hole from this pit, and passing the tensile material, the tensile material does not have a large angle, and the collapse danger rock can be efficiently drawn toward the stable rock. it can. By excavating multiple holes from the front of the slope and inserting and fixing both ends of the U-shaped folded tensile material into the holes, the collapse danger rock mass can function as a large pressure receiving structure. Is remarkably easy. There is no need to work under the slope, and there is no need to stop traffic on the road under the slope, and efficient construction can be performed. The tensile material alone can support hundreds of tons of load, and by applying a large number of these tensile materials vertically and horizontally on a slope, it can support the load of thousands of tons of rock and prevent collapse. There is no need to work on slopes or install structures, and it does not violate the architectural limits of existing roads and buildings.
【図１】安定岩盤上から引張材を通した実施例の説明図
である。FIG. 1 is an explanatory view of an embodiment in which a tensile material is passed from above a stable rock.
【図２】斜面の正面図である。FIG. 2 is a front view of a slope.
【図３】引張材と斜面との間にコンクリート構造物を構
築した断面図である。FIG. 3 is a sectional view in which a concrete structure is constructed between a tension member and a slope.
【図４】引張材を斜面の上のコンクリート構造物内に埋
設した断面図である。FIG. 4 is a cross-sectional view in which a tensile member is embedded in a concrete structure on a slope.
【図５】竪孔から引張材を通した実施例の説明図であ
る。FIG. 5 is an explanatory view of an embodiment in which a tensile material is passed through a vertical hole.
【図６】斜面の正面図である。FIG. 6 is a front view of a slope.
【図７】斜面に形成した削孔内に引張材の両端部を挿入
して定着した実施例の説明図である。FIG. 7 is an explanatory view of an embodiment in which both ends of a tensile material are inserted and fixed in a hole formed on a slope.
【図８】図５の実施例の横断面図である。FIG. 8 is a cross-sectional view of the embodiment of FIG.
【図９】ひとつの削孔内に複数の引張材の一端部を挿入
して斜面表面に引張材中間部を連続させた例である。FIG. 9 is an example in which one end portions of a plurality of tensile members are inserted into one drilled hole, and a tensile member intermediate portion is connected to the slope surface.
【図１０】複数本の引張材の一端部を挿入した削孔の断
面図である。FIG. 10 is a cross-sectional view of a hole in which one ends of a plurality of tensile members are inserted.
１ 崩落危険岩盤 ２ 安定岩盤 ３ 削孔 ４ 引張材 ５ アンカーヘッド ６ 竪孔 ７ 削孔 ８ グラウト材 ９ 吹き付けコンクリート １０ 型枠 １１ コンクリート DESCRIPTION OF SYMBOLS 1 Dangerous rock mass 2 Stable rock mass 3 Drilling hole 4 Tensile material 5 Anchor head 6 Vertical hole 7 Drilling hole 8 Grout material 9 Shotcrete 10 Formwork 11 Concrete
Claims (3)
盤に向って複数の削孔を形成して斜面正面へ貫通させ、
前記削孔のいずれかひとつに引張材の一端部を通して、
中間部は折返して斜面の表面に表出させ、別の削孔に引
張材の他端部を挿入し、安定岩盤上に突出した引張材の
両端を引っ張ることによりプレストレス力を与えて定着
してなる斜面崩落防止工法。1. A plurality of holes are formed from a stable rock on a slope to a rock at risk of collapse on a slope and penetrated to the front of the slope,
Through one end of the tensile material into any one of the drill holes,
The middle part is folded back and exposed on the slope surface, the other end of the tensile material is inserted into another drilled hole, and the both ends of the tensile material protruding on the stable rock are given a prestress force to fix it. Slope fall prevention method.
孔から斜面の崩落危険岩盤に向って複数の削孔を形成し
て斜面正面へ貫通させ、前記削孔のいずれかひとつに引
張材の一端部を通して、中間部は折返して斜面の表面に
表出させ、別の削孔に引張材の他端部を挿入し、竪孔内
に突出した引張材の両端を引っ張ることによりプレスト
レス力を与えて定着してなる斜面崩落防止工法。2. A pit is formed in the stable rock on the slope, and a plurality of pits are formed from the pit to the rock at risk of collapsing on the slope and penetrated to the front of the slope. Through one end of the tensile member, the middle part is turned back and exposed on the surface of the slope, the other end of the tensile member is inserted into another drilled hole, and the ends of the tensile member protruding into the vertical hole are pulled to pull out the end. Slope fall prevention method that is established by applying stress.
危険岩盤を貫通して安定岩盤に至る複数の削孔を形成
し、前記複数の削孔のいずれかに引張材の両端部を別々
に挿入して中間部を斜面表面に沿わし、削孔内にグラウ
ト材を注入して引張材両端部を定着してなる斜面の崩落
防止工法。3. A plurality of drillings are formed from the surface of the slope danger rock mass through the collapse danger rock mass to the stable rock mass, and both ends of the tensile material are separately attached to any of the plurality of drill holes. A method to prevent the slope from collapsing by inserting the middle part along the slope surface, injecting grout into the drilled hole, and fixing both ends of the tensile material.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP9279492A JP3051707B2 (en) | 1997-09-27 | 1997-09-27 | Slope fall prevention method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP9279492A JP3051707B2 (en) | 1997-09-27 | 1997-09-27 | Slope fall prevention method |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH11100816A true JPH11100816A (en) | 1999-04-13 |
| JP3051707B2 JP3051707B2 (en) | 2000-06-12 |
Family
ID=17611810
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP9279492A Expired - Lifetime JP3051707B2 (en) | 1997-09-27 | 1997-09-27 | Slope fall prevention method |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP3051707B2 (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107083775A (en) * | 2017-05-23 | 2017-08-22 | 中国地质科学院探矿工艺研究所 | Rock slope fracture surface replacement treatment method |
| JP2021105266A (en) * | 2019-12-26 | 2021-07-26 | 三井住友建設株式会社 | Compression device and compression method of surrounding bedrock of underground structure |
-
1997
- 1997-09-27 JP JP9279492A patent/JP3051707B2/en not_active Expired - Lifetime
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107083775A (en) * | 2017-05-23 | 2017-08-22 | 中国地质科学院探矿工艺研究所 | Rock slope fracture surface replacement treatment method |
| CN107083775B (en) * | 2017-05-23 | 2018-11-30 | 中国地质科学院探矿工艺研究所 | Rock slope fracture surface replacement treatment method |
| JP2021105266A (en) * | 2019-12-26 | 2021-07-26 | 三井住友建設株式会社 | Compression device and compression method of surrounding bedrock of underground structure |
Also Published As
| Publication number | Publication date |
|---|---|
| JP3051707B2 (en) | 2000-06-12 |
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