JPS6215311Y2 - - Google Patents
Info
- Publication number
- JPS6215311Y2 JPS6215311Y2 JP1983014431U JP1443183U JPS6215311Y2 JP S6215311 Y2 JPS6215311 Y2 JP S6215311Y2 JP 1983014431 U JP1983014431 U JP 1983014431U JP 1443183 U JP1443183 U JP 1443183U JP S6215311 Y2 JPS6215311 Y2 JP S6215311Y2
- Authority
- JP
- Japan
- Prior art keywords
- anchor material
- lath
- anchor
- hole
- injection agent
- 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
- 239000000463 material Substances 0.000 claims description 61
- 238000002347 injection Methods 0.000 claims description 22
- 239000007924 injection Substances 0.000 claims description 22
- 239000003795 chemical substances by application Substances 0.000 claims description 21
- 125000006850 spacer group Chemical group 0.000 claims description 9
- 238000004873 anchoring Methods 0.000 description 6
- 239000002689 soil Substances 0.000 description 6
- 238000010276 construction Methods 0.000 description 5
- 239000003673 groundwater Substances 0.000 description 4
- 238000000034 method Methods 0.000 description 3
- 229910000831 Steel Inorganic materials 0.000 description 1
- 239000000853 adhesive Substances 0.000 description 1
- 230000001070 adhesive effect Effects 0.000 description 1
- 239000004568 cement Substances 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000011440 grout Substances 0.000 description 1
- 239000008267 milk Substances 0.000 description 1
- 210000004080 milk Anatomy 0.000 description 1
- 235000013336 milk Nutrition 0.000 description 1
- 239000004570 mortar (masonry) Substances 0.000 description 1
- NJPPVKZQTLUDBO-UHFFFAOYSA-N novaluron Chemical compound C1=C(Cl)C(OC(F)(F)C(OC(F)(F)F)F)=CC=C1NC(=O)NC(=O)C1=C(F)C=CC=C1F NJPPVKZQTLUDBO-UHFFFAOYSA-N 0.000 description 1
- 239000011435 rock Substances 0.000 description 1
- 239000004576 sand Substances 0.000 description 1
- 238000007711 solidification Methods 0.000 description 1
- 230000008023 solidification Effects 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
Landscapes
- Piles And Underground Anchors (AREA)
Description
【考案の詳細な説明】
本考案は、アンカー工法におけるアンカー材の
定着構造に関する。[Detailed Description of the Invention] The present invention relates to a structure for anchoring an anchor material in an anchor construction method.
アンカー工法は、例えば第１図に示すように、
垂直切断面において土砂崩れを防止するために適
用される。その工法を説明すると、切断面に土留
め壁１を添設し、切断面より地盤中にボーリング
によつて斜め下方に掘孔する。この孔２にPC鋼
材等からなるアンカー材３を挿入し、アンカー材
３の先端部外周にモルタル、セメントミルク等か
らなる注入剤４を注入し、定着部５を形成する。
そして、アンカー材３の他端は台座６および締付
金具７によつて土留め壁１に固定する。したがつ
て土留め壁１にかかる土圧は、アンカー材３の引
張力によつて受け止められ、土砂崩れを防止する
ことができる。 The anchor method, for example, as shown in Figure 1,
Applied to prevent landslides in vertical cuts. To explain the construction method, an earth retaining wall 1 is attached to the cut surface, and a hole is dug diagonally downward into the ground from the cut surface by boring. An anchor material 3 made of prestressed steel or the like is inserted into this hole 2, and a fixing agent 4 made of mortar, cement milk, etc. is injected into the outer periphery of the tip of the anchor material 3 to form a fixing part 5.
The other end of the anchor material 3 is fixed to the retaining wall 1 using a pedestal 6 and a fastening fitting 7. Therefore, the earth pressure applied to the earth retaining wall 1 is absorbed by the tensile force of the anchor material 3, and landslides can be prevented.
しかしながら、かかる従来のアンカー工法にお
いては、例えば切断面上部の地上に家屋８や電車
９の軌道１０が建設されている場合に、上方から
の振動、土圧によつて孔２が崩れてしまい、アン
カー材３に崩壊土が接触して注入剤４が確実に付
着されず、かつ注入剤４とアンカー材３との接着
が充分になされないことがあつた。このような孔
２の崩壊は、掘孔した地盤中の地下水位が高い場
合にも生じ易かつた。そして、注入剤４が充分に
注入されず、かつ注入剤４とアンカー材３との接
着が充分になされない場合には、アンカー材３が
抜け易くなり、土留め壁１にかかる土圧を受け止
めることができなくなる恐れがあつた。 However, in such conventional anchor construction methods, for example, when a house 8 or a track 10 for a train 9 is constructed on the ground above the cut surface, the hole 2 may collapse due to vibrations and earth pressure from above. Collapsed soil came into contact with the anchor material 3, so that the injection agent 4 could not be reliably attached, and the injection agent 4 and the anchor material 3 could not be sufficiently bonded. Such collapse of the hole 2 was also likely to occur when the groundwater level in the ground where the hole was dug was high. If the injecting agent 4 is not sufficiently injected and the adhesion between the injecting agent 4 and the anchor material 3 is not sufficient, the anchor material 3 will easily come off and absorb the earth pressure applied to the earth retaining wall 1. There was a fear that I would not be able to do it.
またアンカー材３を孔２内に挿入した際に、ア
ンカー材３を孔２の中央部に支持させることが難
しいので、注入剤４を注入してもアンカー材３が
偏在することになり、アンカー材３と注入剤４の
接着が充分になされないという問題点もあつた。 Furthermore, when the anchor material 3 is inserted into the hole 2, it is difficult to support the anchor material 3 in the center of the hole 2, so even if the injection agent 4 is injected, the anchor material 3 will be unevenly distributed, and the anchor material 3 will be unevenly distributed. Another problem was that the material 3 and the injection agent 4 were not sufficiently bonded.
例えば実公昭50−34486号公報にはアンカー用
バーの外周に円筒状の定着かごを設け、逆円錐形
の頭部でそのかごを押し開く技術が開示されてい
る。しかしながら、かかる公知の技術では、定着
かごを逆円錐コーンで拡大するという面倒な作業
を必要とし、その拡大作業によつてかごの変形や
地山の崩壊が生じ、定着グラウト材中に土砂がま
じつたりして定着力が不十分となる。特に逆円錐
コーンの作動より坑内トラブルが発生しても、そ
の確認ができない。 For example, Japanese Utility Model Publication No. 50-34486 discloses a technique in which a cylindrical fixing cage is provided around the outer periphery of an anchor bar, and the cage is pushed open with an inverted conical head. However, such known techniques require the troublesome work of enlarging the anchorage basket with an inverted cone, and the expansion operation causes deformation of the cage, collapse of the ground, and dirt is mixed into the anchorage grout material. It becomes sticky and the fixing power is insufficient. In particular, even if trouble occurs in the mine due to the operation of the inverted cone, it cannot be confirmed.
したがつて本考案の目的は、ボーリング孔が崩
れてもアンカー材が埋設されず、注入剤を容易に
注入でき、またラスによつて地山を傷付けること
のないアンカー材の定着構造を提供するにある。 Therefore, the purpose of the present invention is to provide an anchoring structure for anchoring material in which the anchoring material is not buried even if the borehole collapses, the injection agent can be easily injected, and the ground is not damaged by the lath. It is in.
本考案によれば、ボーリングされた孔内に挿入
され、先端部を注入剤によつて定着されたアンカ
ー材の定着構造において、該アンカー材の先端部
外周にラスが巻回されており、該アンカー材とラ
スとの間にはスペーサが介在されている。 According to the present invention, in the fixing structure of the anchor material, which is inserted into a bored hole and whose tip end is fixed with an injection agent, a lath is wound around the outer periphery of the tip end of the anchor material. A spacer is interposed between the anchor material and the lath.
したがつてスペーサを介してアンカー材に取付
けたラス（金網）をボーリング孔に入れるので、
土圧、振動、地下水によつて孔が崩れても崩壊土
がアンカー材に接触せず、アンカー材の定着部の
外周に注入剤を注入するためのスペースがスペー
サによつて保たれ、定着力が低下しない。またア
ンカー材はスペーサによつてラスの中心部に位置
しているので、注入剤の注入後に、注入剤の中心
部分に埋設され、充分な抜け止め効果を有してい
る。ラスは比較的に柔かく、挿入時にボーリング
孔を押圧しないので、孔壁を傷付けない。そのた
めに本考案は、砂、岩等の地山の種類によつて影
響を受けず、すべての場合に好適に実施できる。 Therefore, the lath (wire mesh) attached to the anchor material via a spacer is inserted into the borehole.
Even if the hole collapses due to earth pressure, vibration, or ground water, the collapsed soil will not come into contact with the anchor material, and the spacer will maintain a space for injecting the injection agent around the periphery of the anchor material's anchoring part, thereby increasing the anchoring force. does not decrease. Furthermore, since the anchor material is located at the center of the lath by the spacer, it is buried in the center of the injection agent after injection of the injection agent, and has a sufficient effect of preventing it from coming off. The lath is relatively soft and does not press against the borehole when inserted, so it does not damage the borehole wall. Therefore, the present invention is not affected by the type of ground such as sand or rock, and can be suitably implemented in all cases.
以下、本考案の実施例を第２図および第３図を
参照して説明する。なお、図中、第１図と同一部
分には同符号を付し、その説明を省略することに
する。 Hereinafter, embodiments of the present invention will be described with reference to FIGS. 2 and 3. In addition, in the figure, the same parts as in FIG. 1 are given the same reference numerals, and the explanation thereof will be omitted.
第２図および第３図に示すように、本考案によ
れば、アンカー材３の先端部にラス１１が巻回さ
れている。この場合、ラス１１はあらかじめ筒状
に形成され、その中央にアンカー材３を挿入する
ことによつてアンカー材３に取付けるようにして
もよく、あるいは、平面状に形成されたラス１１
をアンカー材３の外周に二重、三重に巻き付けて
ラス１１をアンカー材３に取付けるようにしても
よい。そしてアンカー材３はラス１１を巻回され
た状態で孔２内に挿入され、注入剤４を注入され
てアンカー材３の先端部はラス１１とともに注入
剤４に埋設され、地盤中に定着されている。 As shown in FIGS. 2 and 3, according to the present invention, a lath 11 is wound around the tip of the anchor material 3. In this case, the lath 11 may be formed into a cylindrical shape in advance and attached to the anchor material 3 by inserting the anchor material 3 into the center thereof, or the lath 11 may be formed into a planar shape.
The lath 11 may be attached to the anchor material 3 by wrapping it double or triple around the outer periphery of the anchor material 3. Then, the anchor material 3 is inserted into the hole 2 with the lath 11 wound around it, and the injection agent 4 is injected, and the tip of the anchor material 3 is buried in the injection agent 4 together with the lath 11, and is fixed in the ground. ing.
上記の構成において、アンカー材３をラス１１
とともに孔２内に挿入した際、上方からの土圧や
地下水によつて孔２が崩れたとしても、崩壊土は
ラス１１に阻止されてアンカー材３には接触せ
ず、かつラス１１によつて孔２内の空間が埋設さ
れてしまうことを防止できる。したがつて、この
状態で注入剤４を注入すれば、アンカー材３の先
端部とラス１１とは注入剤４中に埋設され、注入
剤４の固化によつて地盤中に強固に定着される。
またアンカー材３を孔２内に挿入した際、ラス１
１がスペーサ的な役割りを果して、アンカー材３
が孔２のほぼ中央部に支持されるので、アンカー
材３が孔壁に接触することなく注入剤４の中央部
に埋設されるので、注入剤４とアンカー材３との
接着力も強化される。 In the above configuration, the anchor material 3 is
Even if the hole 2 collapses due to earth pressure from above or groundwater when inserted into the hole 2, the collapsed soil will be blocked by the lath 11 and will not come into contact with the anchor material 3, and the lath 11 will prevent the collapsed soil from coming into contact with the anchor material 3. It is possible to prevent the space in the hole 2 from being buried. Therefore, if the injection agent 4 is injected in this state, the tip of the anchor material 3 and the lath 11 will be buried in the injection agent 4, and will be firmly fixed in the ground by solidification of the injection agent 4. .
Also, when inserting the anchor material 3 into the hole 2, the lath 1
1 serves as a spacer, and anchor material 3
is supported almost at the center of the hole 2, so the anchor material 3 is buried in the center of the injection material 4 without contacting the hole wall, and the adhesive force between the injection material 4 and the anchor material 3 is also strengthened. .
そして、第３図の想像線で示す如く、ラス１１
とアンカー材３との間にスペーサ１２を介在させ
て、ラス１１をアンカー材３にしつかりと固定さ
せてある。この場合、スペーサ１２は放射状でも
よく、円盤状でもよい。また工事が完成して、ア
ンカー材３が必要なくなつた場合には、孔２内に
ぼう張材等を注入して固化された注入剤４を破壊
して、アンカー材３を抜き取ることができるが、
その場合、アンカー材３としてパイプ状のものを
使用すればぼう張材の注入が容易である。また、
アンカー材３はより線状のものを使用することも
できる。 Then, as shown by the imaginary line in Figure 3, the last 11
A spacer 12 is interposed between the anchor material 3 and the lath 11 to firmly fix the lath 11 to the anchor material 3. In this case, the spacer 12 may be radial or disc-shaped. Furthermore, when the construction is completed and the anchor material 3 is no longer needed, the anchor material 3 can be extracted by injecting a filling material or the like into the hole 2 to destroy the solidified injection material 4. but,
In that case, if a pipe-shaped anchor material 3 is used, the filling material can be easily injected. Also,
The anchor material 3 may also be a stranded material.
以上説明したように、本考案によれば、アンカ
ー材の先端部外周にラスが巻回されているので、
ボーリングされた孔が振動、土圧や地下水によつ
て崩れても崩壊土がアンカー材に接触することを
防ぐことができ、アンカー材の先端部外周に注入
剤充填用の空間を保持することができる。またラ
スによつて、アンカー材を孔のほぼ中央部に支持
させることができる。したがつて注入剤の固化に
よりアンカー材をしつかりと土中に定着させ、充
分な緊張力を付与させることができる。 As explained above, according to the present invention, since the lath is wound around the outer circumference of the tip of the anchor material,
Even if the bored hole collapses due to vibration, earth pressure, or groundwater, it can prevent collapsed soil from coming into contact with the anchor material, and it can maintain a space for filling the injection agent around the tip of the anchor material. can. Furthermore, the anchor material can be supported approximately at the center of the hole by the lath. Therefore, by solidifying the injection agent, the anchor material can be firmly fixed in the soil and sufficient tension can be applied.
第１図は一般的なアンカー工法を示す説明図、
第２図は本考案の一実施例を示す断面図、第３図
は第２図における−線に沿つた断面図であ
る。
２……孔、３……アンカー材、４……注入剤、
５……定着部、１１……ラス、１２……スペー
サ。
Figure 1 is an explanatory diagram showing the general anchor construction method.
FIG. 2 is a sectional view showing an embodiment of the present invention, and FIG. 3 is a sectional view taken along the line - in FIG. 2... hole, 3... anchor material, 4... injection agent,
5... Fixing section, 11... Lath, 12... Spacer.
Claims (1)
入剤によつて定着されたアンカー材の定着構造に
おいて、該アンカー材の先端部外周にラスが巻回
されており、該アンカー材とラスとの間にはスペ
ーサが介在されていることを特徴とするアンカー
材の定着構造。 In the fixing structure of an anchor material inserted into a bored hole and its tip fixed by injection agent, a lath is wound around the outer periphery of the tip of the anchor material, and the bond between the anchor material and the lath is An anchor material fixing structure characterized in that a spacer is interposed in between.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1443183U JPS59121036U (en) | 1983-02-04 | 1983-02-04 | Anchor material fixing structure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1443183U JPS59121036U (en) | 1983-02-04 | 1983-02-04 | Anchor material fixing structure |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS59121036U JPS59121036U (en) | 1984-08-15 |
| JPS6215311Y2 true JPS6215311Y2 (en) | 1987-04-18 |
Family
ID=30145794
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP1443183U Granted JPS59121036U (en) | 1983-02-04 | 1983-02-04 | Anchor material fixing structure |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS59121036U (en) |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5034486U (en) * | 1973-07-24 | 1975-04-12 |
-
1983
- 1983-02-04 JP JP1443183U patent/JPS59121036U/en active Granted
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5034486U (en) * | 1973-07-24 | 1975-04-12 |
Also Published As
| Publication number | Publication date |
|---|---|
| JPS59121036U (en) | 1984-08-15 |
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