JPS5942148B2 - Slope stabilization method using anchor rods - Google Patents
Slope stabilization method using anchor rodsInfo
- Publication number
- JPS5942148B2 JPS5942148B2 JP15455681A JP15455681A JPS5942148B2 JP S5942148 B2 JPS5942148 B2 JP S5942148B2 JP 15455681 A JP15455681 A JP 15455681A JP 15455681 A JP15455681 A JP 15455681A JP S5942148 B2 JPS5942148 B2 JP S5942148B2
- Authority
- JP
- Japan
- Prior art keywords
- anchor rods
- slope
- anchor
- soil
- rods
- 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.)
- Expired
Links
Classifications
-
- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D17/00—Excavations; Bordering of excavations; Making embankments
- E02D17/20—Securing of slopes or inclines
Landscapes
- Engineering & Computer Science (AREA)
- Mining & Mineral Resources (AREA)
- Life Sciences & Earth Sciences (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Paleontology (AREA)
- Civil Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Structural Engineering (AREA)
- Piles And Underground Anchors (AREA)
- Pit Excavations, Shoring, Fill Or Stabilisation Of Slopes (AREA)
- Retaining Walls (AREA)
Description
【発明の詳細な説明】
本発明は、土壌斜面の安定下法に関し、詳しくは上記斜
]7iK打設したアンカーロッドの少なくとも2本以上
の地表端同志を緊縛ないしは緊締することを特徴とする
、土壌斜面の杭打安定工法に関する。DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a method for stabilizing a soil slope, and more specifically, the method is characterized in that at least two or more of the ground surface ends of the anchor rods driven by the above-mentioned slope are tied or tightened together. Concerning pile driving stabilization method for soil slopes.
切取り、ないしは盛土によって造成された土壌斜面り)
地すべり又はその他の崩壊を防止する工法として、土壌
斜面にアンカーロッドを打設する工法は公知であり、そ
の崩壊する土塊に対する抵抗力は、曲げ剛性、剪断強さ
、ロッド径、ロッド間隔、突出長、根入れ長、地すべり
而り)深さ、移動層と不動層の土の性質、ロッド背面土
塊の状態、地すべり土庄のかかり方、移動の状態等の関
数であると考えられており、−概に律することはできな
いが、実際の施工にあたってはこれらの要素を単純化し
て種々の計算式が提唱され、その設計計算式に基づいて
施工されている。soil slope created by cutting or filling)
A method of driving anchor rods into soil slopes is known as a construction method to prevent landslides or other collapses, and its resistance to collapsing soil masses is determined by bending rigidity, shear strength, rod diameter, rod spacing, and protrusion length. It is thought that it is a function of the depth of the landslide, the depth of the landslide, the properties of the soil in the moving and immobile layers, the condition of the soil mass on the back of the rod, the way the landslide soil is applied, the state of movement, etc. However, in actual construction, various calculation formulas have been proposed to simplify these elements, and construction is carried out based on these design calculation formulas.
本発明者は上記安定工法をさらに有効ならしめる安定下
法について種々研究をすすめ、ヘアピン又は櫛における
頭髪への緊締力は同ヘアピンないし櫛の歯がハの字をな
す場合に最も有効に働き、髪型等を安定化する現象に着
目し、この知見に基いて新規のアンカーロッドによる斜
面の安定工法を開発し、これを特願昭5’5−4640
7号にて開示した。The present inventor has conducted various studies on stabilization methods to make the above-mentioned stabilization methods even more effective, and found that the tightening force on the hair with a hairpin or comb works most effectively when the teeth of the hairpin or comb form a V-shape. Focusing on the phenomenon of stabilizing hairstyles, etc., and based on this knowledge, we developed a method for stabilizing slopes using a new anchor rod, and applied for this by patent application No. 5'5-4640.
Disclosed in issue 7.
そして同工法は土壌斜面に、規則的または不規則的に複
数本のアンカーロッドを打設し、該アンカーロッドの少
なくとも一部を、少なくとも2本以上の等又は不等数の
複数群((分ち、各群毎にアンカーロッド同志の地表端
を線状物、棒状物、又は緊締具をもって緊縛ないしは緊
締することをその要旨とするものである。This construction method involves driving a plurality of anchor rods regularly or irregularly into a soil slope, and placing at least some of the anchor rods in groups of equal or unequal numbers ((divided into groups) of at least two or more anchor rods. The gist of this method is to bind or tighten the ground surface ends of each group of anchor rods using a linear object, a rod-like object, or a tightening tool.
本発明は実質的に上記安定工法の改良に係るものであり
、その目的は上記安定下法によってもたらされる斜面安
定効果を斜面よりの水抜きを一体的に行うことによって
さらに増大することができるアンカーロッドによる斜面
の安定工法を提供せんとするものである。The present invention substantially relates to an improvement of the above-mentioned stabilization method, and its purpose is to provide an anchor that can further increase the slope stabilization effect brought about by the above-mentioned stabilization method by integrally draining water from the slope. The purpose is to provide a method for stabilizing slopes using rods.
本発明は土壌斜面に、規則的または不規則的に複数本の
アンカーロッドを打設し、該アンカーロッドの少なくと
も一部を、少な(とも2本以上の等又は不等数の複数群
に分ち、各群毎にアンカーロッド同志の地表端を線状物
、棒状物、又は緊縛具をもって緊縛ないしは緊締し、か
つアンカーロッドの内部を地下水排出流路とすることを
特徴とする土壌斜面の杭打安定下法に係るものである。The present invention involves driving a plurality of anchor rods regularly or irregularly into a soil slope, and dividing at least a portion of the anchor rods into a plurality of groups of equal or unequal number of anchor rods. A pile for a soil slope, characterized in that the surface ends of the anchor rods in each group are bound or tightened with a linear object, a rod-like object, or a binding device, and the inside of the anchor rod is used as a groundwater drainage channel. This relates to a method for stabilizing the shot.
上記構成は実質的に2つの構成的特徴、すなわち(1)
アンカーロッドを斜面に打設し、アンカーロッドの地表
端を所要の緊締具にて緊締すること、及び(2)アンカ
ーロッドの内部を地下水等排出通路としたことを包含す
るものであり、以下これら構成的特徴ごとに詳細に説明
する。The above structure essentially has two structural features, namely (1)
This includes driving an anchor rod into a slope, tightening the ground end of the anchor rod with a required tightening tool, and (2) making the inside of the anchor rod a drainage passage for underground water, etc., and hereinafter, these methods include: Each structural feature will be explained in detail.
(1) アンカーロッドの打設
本発明を実施する土壌斜面は切干又は盛り土、風化岩、
亀裂ある岩盤、重粘質ないしは砂質の何れの揚台にでも
適用されるが、既に斜面に亀裂を生じつつある崖面又は
生じる虞れのある産量や崩落性の砂質土壌斜面に施して
特にその効果が著しい。(1) Driving the anchor rod The soil slope on which the present invention is carried out is made of dry and dry land, embankment, weathered rock,
It can be applied to rock with cracks, heavy viscous or sandy platforms, but it should not be applied to cliff surfaces where cracks are already forming on the slope, or slopes with sandy soil that is prone to yield or collapse. The effect is particularly remarkable.
使用するアンカーロッドの材質は金属、木製、コンクリ
ート等測れの材質でも使用され、その長さ、打設の深さ
、打設の間隔等についてはすべて従来からの設計計算式
に基いて打設する。The anchor rods used can be made of metal, wood, concrete, or any other suitable material, and their length, casting depth, spacing, etc. are all based on conventional design calculation formulas. .
なおアンカーの設置はあらかじめ地盤中に削孔した孔中
にアンカーロッドを挿入し、セメントミルクを注入して
固定するため、セメントミルクが亀裂、空隙に浸透して
一体化を増長できる。The anchor is installed by inserting the anchor rod into a hole drilled in the ground in advance and fixing it by injecting cement milk, which allows the cement milk to penetrate into cracks and voids and improve integration.
唯、従来と異なるのは、打設したアンカーロッドの少な
(とも一部を、少なくとも2本以上の等又は不等数の複
数群に分ち、各群毎にアンカーロッド同志の地表端を緊
縛ないしは緊締する点が異なる。The only difference from the conventional method is that the installed anchor rods are divided into groups of at least two or more of equal or unequal numbers, and the ends of the ground surface of the anchor rods are tied together for each group. Or they are different in terms of tightening.
少なくとも2本以上の等又は不等数の複数群とは、例え
ば2本ずつ、3本ずつ、ないしは4本ずつと等数に分ち
、あるいはある群は2本ずつ又は他の群は3本ずつとい
うように不等数の群であってもよいことを意味する。A plurality of groups of equal or unequal numbers of at least 2 or more means, for example, divided into equal numbers of 2, 3, or 4, or some groups have 2 rods, and other groups have 3 rods. This means that it can be a group of unequal numbers, such as one by one.
というのは、先にも述べたようにこの工法は単にアンカ
ーロッドを打設するのみでなく、少な(ともその2本の
地表部を緊締することにより該斜面土壌が安定化するか
らであり、これは一種の圧密理論であり、土壌は加えら
れた力の30係位の粘着力が増加するという理論に基づ
き、緊締する力・疋よって表面近くの土壌を圧密して安
定化することができるからである。This is because, as mentioned earlier, this construction method not only involves simply driving anchor rods, but also stabilizes the slope soil by tightening the ground surface of the two anchor rods. This is a type of consolidation theory, based on the theory that the cohesive force of soil increases by a factor of 30 to the applied force, and the soil near the surface can be consolidated and stabilized by the tightening force. It is from.
すなわち、この圧密された部分は崩壊に対して抵抗する
。That is, this consolidated part resists collapse.
これを第1図に基いて具体的に説明する。This will be explained in detail based on FIG.
いま、斜面に所要長さ打設した後、アンカーロッドの地
表端を所要の緊締手段を用いて緊締すれば(緊締力をF
とする)、斜面深部はF2という力を受ける一方、斜面
表層部はFlによって圧密を受け、これによって安定化
を区名ことができる。Now, after driving the required length on the slope, tighten the ground end of the anchor rod using the required tightening means (the tightening force is F
), the deep part of the slope is subjected to the force F2, while the surface part of the slope is consolidated by Fl, which can be used to stabilize the area.
なお、斜面全体にできるだけ平均してバランスよく力が
加わりさえすれば、特に均一な数に分けたり、均一 な
群IC分ける必要はない。It should be noted that as long as the force is applied to the entire slope in a well-balanced and average manner, there is no need to divide it into uniform numbers or groups.
しかし斜面全体がバランスよ(安定性を保つためには、
全体が崩落性の土壌斜面の場合等には第2図又は第3図
、第4図の平面図て示すように、各2本毎、又は3本毎
で、かつできるだけ平均した群の分布を示す方が好まし
いが、特にそうせず第2.3.4図の組4合わせを任意
に混合した場合でも、単なる杭打ちよりは安定性がよい
ことは先にも述べたとおりであることは実験によって確
められている。However, the entire slope must be balanced (in order to maintain stability,
In the case of a soil slope where the entire soil is collapsing, as shown in the plan view of Figure 2, Figure 3, or Figure 4, the distribution of groups should be calculated every two or every three, and as average as possible. Although it is preferable to show the piles, even if you do not do so and arbitrarily mix the four combinations shown in Figure 2.3.4, the stability is better than that of simple pile driving, as mentioned earlier. Confirmed by experiment.
第1〜4図中、1はアンカーロッド、2は緊縛ないしは
緊締具、3は緊締具の−つターンバックルを示す。In Figs. 1 to 4, 1 indicates an anchor rod, 2 indicates a binding or tightening device, and 3 indicates a turnbuckle of the tightening device.
又、土壌斜面の構造、土質等の状況によっては一部分の
みに本発明の工法を施し、他は緊縛を施さず、杭打ちの
みとするか、ないしは杭打ちも施さない場合も本発明の
工法に包含され、特許請求の範囲の少なくとも一部とは
その意味である。Furthermore, depending on the structure of the soil slope, the soil quality, etc., the construction method of the present invention may be applied to only one part of the slope, and only pilings may be applied to the rest without binding, or the construction method of the present invention may also be applied when no pilings are performed. It is intended to be encompassed, at least in part, by the claims.
特に切土斜面の産量に既に亀裂を生じるか亀裂を生じる
徴候が表われた場合には、第5図の斜視図に示すように
、その亀裂4の相対する両側線((アンカーロッド1を
打切して亀裂4を挟んで両側のアンカーロッド毎に緊縛
2することにより亀裂の進行と、それ以上の亀裂の発生
を完全に防止することができたが、この場合等はアンカ
ーロッドの打設と緊縛を不均一に行うことにより著しい
効果を示した例である。In particular, if the yield of the cut slope has already cracked or shows signs of cracking, cut the opposing sides of the crack 4 ((anchor rod 1 is By tightening the anchor rods 2 on both sides of the crack 4, it was possible to completely prevent the crack from progressing and further cracks from forming. This is an example of a remarkable effect achieved by performing bondage unevenly.
なお、第6図に示すごとく、本願工法は地表面に表われ
ない内部亀裂の発生も未然に防止でき、一方万一発生し
た場合でもその成長を可及的に抑止することができる。As shown in FIG. 6, the construction method of the present application can prevent the occurrence of internal cracks that do not appear on the ground surface, and even if they do occur, their growth can be suppressed as much as possible.
この杭頭部を緊縛ないしは緊締するための線状具、棒状
具ないしは緊締具としては、綿ないしは麻、金属のロー
プ、金属の線状物、棒状物、片状物、アングル管状物等
のすべての線状物、棒状物が用いられ、締め付は固定方
法としても緊縛、鋲止め、螺着やターンバックル等の緊
締具や、アンカーロッドが木製の場合、両地表部に楔を
打ち込むことによって緊縛ないしは緊締する等、要は地
表部が緊縛されるアンカーの形がへの字状となり、緊縛
方向が逆への字状となるようなすべての緊縛ないしは緊
締手段を包含するものである。The wires, rods, or tightening tools for binding or tightening the pile head may include any of cotton or hemp, metal ropes, metal wires, rods, pieces, angle tubular items, etc. Linear or rod-shaped objects are used, and tightening can be done by using tightening devices such as binding, rivets, screws, turnbuckles, etc., or by driving wedges into both ground surfaces if the anchor rod is made of wood. In short, it includes all binding or tightening means in which the shape of the anchor to which the ground surface is tied is in the shape of a square, and the direction of the binding is in the opposite direction.
第1図は杭頭の緊締をターンバックル3を用いて実施し
た斜視説明図である。FIG. 1 is a perspective explanatory view of tightening the pile head using a turnbuckle 3.
(2) 内部に地下水排出流路を有するアンカーロッ
ド第8図及び第9図に内部に地下水排出流路10を形成
したアンカーロッド11の一実施例が示されており、ア
ンカーロッド11は実質的に両端開口の長尺筒体より形
成される。(2) Anchor rod having a groundwater discharge channel inside FIGS. 8 and 9 show an embodiment of an anchor rod 11 having a groundwater discharge channel 10 formed inside, and the anchor rod 11 is substantially It is formed from a long cylindrical body with openings at both ends.
上記アンカーロッド11の打設はまずAB位置にて遮断
壁14を有するロッド挿入孔12を掘削し、同挿入孔内
にアンカーロッド11を挿入し、AB−CDの間隙を注
入固化することによってアンカーロッド11を固定する
とともにアンカーロッド11下端と対峙する挿入孔12
の底部に地下水等滞留空間13を形成することによって
なされる。The anchor rod 11 is installed by first drilling a rod insertion hole 12 having a blocking wall 14 at the AB position, inserting the anchor rod 11 into the insertion hole, and injecting and solidifying the gap between AB and CD. An insertion hole 12 that fixes the rod 11 and faces the lower end of the anchor rod 11.
This is done by forming an underground water retention space 13 at the bottom of the tank.
またAB−EF間のアンカーロッド11には排水口15
が所要数設けられている。In addition, the anchor rod 11 between AB and EF has a drain port 15.
are provided in the required number.
上記構成によって地下水は絶えず地下水排出流路10を
介して外部へ排出されることになり、上述してきた構成
的特徴(1)と協働して斜面の安定化を確実なものとす
ることができる。With the above configuration, groundwater is constantly discharged to the outside via the groundwater discharge channel 10, and in cooperation with the above-mentioned structural feature (1), stabilization of the slope can be ensured. .
第1図は本発明に係る安定工法の圧密理論の説明図、第
2,3.4図はそれぞれ杭打ちを実施した後、本発明の
杭頭緊縛をそれぞれ2本ずつ、3本ずつ、4本ずつに分
けて実施した平面説明図、第5図は本発明の杭打ち緊縛
を斜面に生じた亀裂に沿って実施した例を斜視図で示す
。
第6図は内部亀裂に対する本発明に係るアンカーロッド
の作用説明図、第7図は本発明の杭打ち緊縛をターンバ
ックルを用いて実施した態様を斜視図で示す。
また第8図は内部(C地下水排出流路を形成するアンカ
ーロッドの断面正面図、第9図は同拡大説明図である。
ら゛Figure 1 is an explanatory diagram of the consolidation theory of the stable construction method according to the present invention, and Figures 2 and 3.4 show that after driving the piles, the pile caps of the present invention are tightened for two piles, three piles, and four piles, respectively. FIG. 5 is an explanatory plan view that was carried out separately for each book, and FIG. 5 is a perspective view showing an example in which the piling binding of the present invention was carried out along a crack that occurred on a slope. FIG. 6 is an explanatory view of the effect of the anchor rod according to the present invention on internal cracks, and FIG. 7 is a perspective view showing an embodiment in which the pile driving and binding of the present invention is implemented using a turnbuckle. In addition, Fig. 8 is a cross-sectional front view of the anchor rod forming the internal (C groundwater discharge channel), and Fig. 9 is an enlarged explanatory view of the same.
Claims (1)
カーロッドを打設し、該アンカーロッドの少な(とも一
部を、少な(とも2本以上の等又は不等数の複数群に分
ち、各群毎にアンカーロッド同志の地表端を線状物、棒
状物、又は緊縛具をもって緊縛ないしは緊締し、かつア
ンカーロッドの内部を地下水排出流路とすることを特徴
とするアンカーロッドによる斜面の安定下法。1. Driving a plurality of anchor rods regularly or irregularly into a soil slope, and dividing a small number of the anchor rods into groups of equal or unequal number of anchor rods. A slope using anchor rods, characterized in that the ground surface ends of the anchor rods are bound or tightened in each group with linear objects, rod-like objects, or binding tools, and the interior of the anchor rods is used as a groundwater drainage channel. Under stable conditions.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP15455681A JPS5942148B2 (en) | 1981-09-28 | 1981-09-28 | Slope stabilization method using anchor rods |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP15455681A JPS5942148B2 (en) | 1981-09-28 | 1981-09-28 | Slope stabilization method using anchor rods |
Publications (2)
Publication Number | Publication Date |
---|---|
JPS5854131A JPS5854131A (en) | 1983-03-31 |
JPS5942148B2 true JPS5942148B2 (en) | 1984-10-12 |
Family
ID=15586828
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP15455681A Expired JPS5942148B2 (en) | 1981-09-28 | 1981-09-28 | Slope stabilization method using anchor rods |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS5942148B2 (en) |
Families Citing this family (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN107246019B (en) * | 2017-06-30 | 2019-10-29 | 浙江大学 | A kind of slope underground water drilling self-starting drainage by suction method |
-
1981
- 1981-09-28 JP JP15455681A patent/JPS5942148B2/en not_active Expired
Also Published As
Publication number | Publication date |
---|---|
JPS5854131A (en) | 1983-03-31 |
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