JPS62197599A - Self-boring bolt - Google Patents
Self-boring boltInfo
- Publication number
- JPS62197599A JPS62197599A JP3836086A JP3836086A JPS62197599A JP S62197599 A JPS62197599 A JP S62197599A JP 3836086 A JP3836086 A JP 3836086A JP 3836086 A JP3836086 A JP 3836086A JP S62197599 A JPS62197599 A JP S62197599A
- Authority
- JP
- Japan
- Prior art keywords
- bolt
- jet
- hole
- press
- tip
- 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
- 239000000463 material Substances 0.000 claims description 17
- 238000005553 drilling Methods 0.000 claims description 14
- 238000002347 injection Methods 0.000 claims description 2
- 239000007924 injection Substances 0.000 claims description 2
- 238000010276 construction Methods 0.000 description 8
- 239000011440 grout Substances 0.000 description 4
- 239000004568 cement Substances 0.000 description 3
- 238000004891 communication Methods 0.000 description 3
- 239000004519 grease Substances 0.000 description 3
- 239000008267 milk Substances 0.000 description 3
- 210000004080 milk Anatomy 0.000 description 3
- 235000013336 milk Nutrition 0.000 description 3
- 238000012986 modification Methods 0.000 description 3
- 230000004048 modification Effects 0.000 description 3
- 230000008878 coupling Effects 0.000 description 2
- 238000010168 coupling process Methods 0.000 description 2
- 238000005859 coupling reaction Methods 0.000 description 2
- 239000007788 liquid Substances 0.000 description 2
- 239000002184 metal Substances 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 230000002787 reinforcement Effects 0.000 description 2
- 238000003466 welding Methods 0.000 description 2
- 229910000831 Steel Inorganic materials 0.000 description 1
- 239000000853 adhesive Substances 0.000 description 1
- 230000001070 adhesive effect Effects 0.000 description 1
- 238000004873 anchoring Methods 0.000 description 1
- 239000004927 clay Substances 0.000 description 1
- 150000001875 compounds Chemical class 0.000 description 1
- 238000007796 conventional method Methods 0.000 description 1
- 230000001066 destructive effect Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000011796 hollow space material Substances 0.000 description 1
- 230000001788 irregular Effects 0.000 description 1
- 239000000314 lubricant Substances 0.000 description 1
- 239000004570 mortar (masonry) Substances 0.000 description 1
- 238000005086 pumping Methods 0.000 description 1
- 230000003014 reinforcing effect Effects 0.000 description 1
- 239000012779 reinforcing material Substances 0.000 description 1
- 239000011435 rock Substances 0.000 description 1
- 239000004576 sand Substances 0.000 description 1
- 238000004904 shortening Methods 0.000 description 1
- 239000002689 soil Substances 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
Landscapes
- Consolidation Of Soil By Introduction Of Solidifying Substances Into Soil (AREA)
Abstract
(57)【要約】本公報は電子出願前の出願データであるた
め要約のデータは記録されません。(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.
Description
【発明の詳細な説明】
（産業上の利用分野）
この発明は、ＮＡＴＭや切土、盛土の補強工法に使用さ
れる自穿孔ポル１−に関する。DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention relates to a self-drilling pole 1- used in NATM, cutting, and embankment reinforcement methods.
（従来の技術）
ＮＡＴＭやアースネイリング工法に代表される補強土工
法では、土砂あるいは岩盤に比較的短い鋼製あるいはＦ
、Ｒ，Ｐ製のボルトを埋設し、その周囲をグラウトなど
で固め補強部を構築し、トンネル壁面や法面などを安定
化させる。(Conventional technology) In reinforced earth construction methods such as NATM and earth nailing methods, relatively short steel or F.
Bolts made of , R, and P are buried, and the surrounding area is hardened with grout to build reinforcements and stabilize tunnel walls and slopes.
この種の工法は、岩盤などの密実な地盤では、削岩機な
どで先行削孔し、セメントミルクあるいはモルタルなど
の定着材を孔内に注入した後、ポル１−を挿入して、定
着材とボルトの全面接着固定が行なわれる。In this type of construction method, in dense ground such as bedrock, a hole is drilled in advance using a rock drill, a fixing material such as cement milk or mortar is injected into the hole, and a hole is inserted to fix the hole. The material and bolts are fully adhesively fixed.
一方、粘土や砂のような沖積地盤、１錐あるいは強風化
合のような崩壊性の地盤では、削孔後孔壁の自立が保た
れず、グラウトなどの定着材の注入、およびボルトの挿
入が不可能になったり、または、これらの作業が行なわ
れたとしても十分な定着が得られない場合が多い。On the other hand, in alluvial ground such as clay or sand, or collapsible ground such as single cone or strong wind compound, the self-supporting of the hole wall cannot be maintained after drilling, making it difficult to inject anchoring materials such as grout and insert bolts. In many cases, it becomes impossible, or even if these operations are performed, sufficient fixation cannot be obtained.
このため従来は、（１） ｉ＋１壊性地盤にボルトを埋
設する際に、ケーシングを使用して孔壁の崩壊を防止し
つつ削孔するか、（２）先端に拡孔用のビットを備えた
自穿孔ボルトを使用することが行なわれている。For this reason, the conventional methods were to either (1) use a casing to prevent the hole wall from collapsing while drilling when burying the bolt in i+1 destructive ground, or (2) equip the tip with a hole-expanding bit. The use of self-drilling bolts has been practiced.
（発明が解決しようとする問題点）
しかしながら、これらはいずれも以下に示す如き問題が
あった。(Problems to be Solved by the Invention) However, all of these have the following problems.
すなわち、前記（１）では、ケーシングを使用する削孔
に時間がかかるとともに、削孔後グラウト注入、ボルト
挿通、ケーシング引抜ぎという一連の作業が煩雑となり
工期、工費がともに増大する。That is, in (1) above, it takes time to drill holes using the casing, and the series of operations such as injecting grout after drilling, inserting bolts, and pulling out the casing become complicated, increasing both the construction period and construction cost.
一方、前記（２）では、先端のビットが高価であり、こ
れが埋殺しになるため工費が嵩むとともに、先端ビット
で拡孔しても地山が定着材を注入するまでに崩壊する慣
れがあった。On the other hand, in (2) above, the bit at the tip is expensive, which increases the construction cost because it is buried, and even if the hole is expanded with the bit at the tip, the ground tends to collapse by the time the fixing material is injected. Ta.
この発明は以上の如き問題点に鑑みてなされたものであ
って、穿孔しつつ定着材を削孔の周縁に注入し、これに
よって作業の簡単化および工期の短縮化を図るようにす
ることを目的とする。This invention was made in view of the above-mentioned problems, and involves injecting a fixing material into the periphery of the hole while drilling, thereby simplifying the work and shortening the construction period. purpose.
（問題点を解決するための手段）
前記目的を達成するため、この発明は、後端部から打撃
、圧入１回転、撮動が加えられる先端部コーン形をした
内部中空のジェットボルトと、該ジェットボルトの後端
に着脱可能であって、液密かつ相対回転自在に連結され
、かつ前記中空内部に連通する定着材圧入用のスイベル
と、前記ジェットボルトの先端部にあって、前記中空内
部に同軸および放射状に連通ずる複数のジェット噴射口
とからなることを特徴とする。(Means for Solving the Problems) In order to achieve the above object, the present invention provides an internally hollow jet bolt with a cone-shaped tip, to which impact, one rotation of press-fitting, and photographing are applied from the rear end; a swivel for press-fitting a fixing material, which is removably connected to the rear end of the jet bolt, liquid-tightly and relatively rotatably connected, and communicates with the hollow interior; and a plurality of jet injection ports coaxially and radially communicating with each other.
（実施例）
以下、この発明の実施例を図面を参照にして詳細に説明
する。(Embodiments) Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.
第１図はこの発明の第１実施例による自穿孔ボルトの全
体構成を示す断面図、第２図（ａ）は第１図のＡ部拡大
図である。FIG. 1 is a sectional view showing the overall structure of a self-drilling bolt according to a first embodiment of the present invention, and FIG. 2(a) is an enlarged view of section A in FIG. 1.
図において、この自穿孔ボルトは、先端部１ａがコーン
形に形成された厚肉の引抜きパイプからなるジェットボ
ルト１と、ジェットボルト１の後部にスイベルサブ２を
介して一体的に連結されたスイベル３とからなっている
。In the figure, this self-drilling bolt includes a jet bolt 1 made of a thick drawn pipe with a cone-shaped tip 1a, and a swivel 3 integrally connected to the rear of the jet bolt 1 via a swivel sub 2. It consists of
前記ジェットボルト１の中心軸部には定着材圧入用孔１
１が形成されているとともに、この圧入用孔１１の先端
側にはこれと同軸上のジェット噴出口１３および所定角
度θで交叉する複数のジェット噴出口１４がそれぞれ形
成されている。なお、中心部のジェット噴出口１３は前
記圧入用孔１１内に硬質金属からなるチップ１３ａを埋
設し、その中央部を穿孔することによって開口形成され
たものである。A hole 1 for press-fitting the fixing material is provided in the central shaft portion of the jet bolt 1.
1 is formed, and a jet nozzle 13 coaxial therewith and a plurality of jet nozzles 14 intersecting at a predetermined angle θ are formed on the tip side of the press-fitting hole 11, respectively. The jet outlet 13 at the center is formed by embedding a chip 13a made of hard metal in the press-fitting hole 11 and drilling a hole in the center thereof.
前記スイベルサブ２はその中心に前記定着材圧入用孔１
１に連通ずる連絡孔２１を形成するとともに、その前端
内周部に前記ジェットボルト１の後端外周に形成された
雄ネジ部１２に螺合する雌ネジ部２２およびその後端外
周部に前記スイベル３の先端に螺合する雄ネジ部２３を
形成したものである。そして、このスイベルサブ２の先
端外周にはシールリング２２ａが配されており、前記ジ
ェットボルト１とスイベルザブ２との螺合状態でこれを
液苫にシールしている。The swivel sub 2 has the fixing material press-fitting hole 1 in its center.
A communication hole 21 communicating with the jet bolt 1 is formed at the inner periphery of the front end thereof, and a female thread 22 screwed into the male thread 12 formed at the outer periphery of the rear end of the jet bolt 1, and a swivel at the outer periphery of the rear end thereof. A male threaded portion 23 is formed to be screwed into the tip of 3. A seal ring 22a is disposed on the outer periphery of the tip of the swivel sub 2, and the jet bolt 1 and the swivel sub 2 are screwed together to seal this to the liquid.
前記スイベル３は前記スイベルサブ２の後ＱＭＩネジ部
に螺合する雌ネジ部３１ａを形成した本体部３１と、本
体部３１の外周に回転可能、かつ液Δに設けられたリン
グ部３２および１「力受は板３３からなっている。The swivel 3 has a main body part 31 formed with a female screw part 31a that is screwed into the rear QMI thread part of the swivel sub 2, and a ring part 32 and 1' which are rotatable around the outer periphery of the main body part 31 and are provided in the liquid Δ. The force receiver consists of a plate 33.
本体部３１の前記雄ネジ部２３の結合端内周部にはシー
ルリング３１ｂが嵌合され、スイベルサブ２と本体部３
１との間を液密に固定している。A seal ring 31b is fitted to the inner periphery of the connecting end of the male threaded portion 23 of the main body portion 31, and the swivel sub 2 and the main body portion 3 are connected to each other.
1 is fixed liquid-tightly.
そして、本体１部３１には前記連絡孔２１に一端を連通
ずるとともに、リング部３２の内周に他端を開口させた
定着材圧入孔３１Ｇが形成されている。A fixing material press-fitting hole 31G is formed in the main body 1 part 31, with one end communicating with the communication hole 21 and the other end opening at the inner periphery of the ring part 32.
これに対し、前記リング部３２の内周部には前記圧入孔
３１Ｃに連通するリング状溝３２８が形成されていると
ともに、該リング状溝３２に連通する圧入孔３２ｂを外
周にＩＩ口している。そして、圧入孔３２ｂにはホース
ジヨイント３４を介して高圧ホース３５が接続されてい
る。なお、この高圧ホース３５はセメントミルク等の定
着材圧送用高圧グラウトポンプに連通している。On the other hand, a ring-shaped groove 328 that communicates with the press-fit hole 31C is formed in the inner circumference of the ring portion 32, and a press-fit hole 32b that communicates with the ring-shaped groove 32 is formed on the outer circumference. There is. A high-pressure hose 35 is connected to the press-fit hole 32b via a hose joint 34. Note that this high-pressure hose 35 is connected to a high-pressure grout pump for pumping fixing material such as cement milk.
さらに、前記リング部の内周には複数のシールリング、
３６が配置されているとともに、各シールリング３６に
潤滑剤を供給するグリス孔３７が形成され、該グリス孔
３７の外周をグリスカップ３８で覆っている。Furthermore, a plurality of seal rings are provided on the inner periphery of the ring portion,
36 are arranged, and a grease hole 37 for supplying lubricant to each seal ring 36 is formed, and the outer periphery of the grease hole 37 is covered with a grease cup 38.
そして、１１す２推力受は板３３の前端部およびリング
部３２の後端と本体部３１との間にはスラス上方向の振
動や打撃を減衰させるためのシールを兼ねたクッション
板３９が配置されている。In the 11-2 thrust receiver, a cushion plate 39 is arranged between the front end of the plate 33 and the rear end of the ring part 32 and the main body part 31, which also serves as a seal to damp vibrations and impacts in the upward direction of the thrust. has been done.
なお、ジェットボルト１の表面形状は第２図（ｂ）に示
すように定着材との付着力を増大させるため網目などの
異形形状１ｂにする等の工夫が゛なされている。As shown in FIG. 2(b), the surface shape of the jet bolt 1 is designed to have an irregular shape 1b such as a mesh in order to increase the adhesive force with the fixing material.
以上の構成の自穿孔ボルトは、本体部３１の後端に形成
された雌ネジ部３１ｄに打撃、圧入１回転、振動のいず
れか又はこれらの組合せを行なうための装置に接続され
、矢印方向の力Ｆを加えることにより先端のジェットボ
ルト１を土中に打込み、削孔しつつ図示しない圧送用ポ
ンプから圧送されたセメントミルクなどの定着材を圧入
孔３２ｂ、３１ｃ、および連絡孔２１．圧入用孔１１を
伝ってジェット噴出口１３．１４から噴出することにな
る。このとき定着材はジェットボルト１の先端のみでな
く、ジェット噴出口１４の交叉角度θに応じた角度で噴
出するので、ジェットボルト１の外周部全体を大きく包
み込む状態で地盤内にしみ込む。これによって、ジェッ
トボルト１の一本あたりの地盤に対する定着範囲は大き
なものとなるのである。The self-drilling bolt with the above configuration is connected to a device for performing impact, press-fitting one rotation, vibration, or a combination thereof on the female threaded part 31d formed at the rear end of the main body part 31, and is By applying a force F, the jet bolt 1 at the tip is driven into the soil, and while drilling a hole, a fixing material such as cement milk pumped from a pump (not shown) is press-fitted into the holes 32b, 31c, and the communication hole 21. It passes through the press-fit hole 11 and is ejected from the jet outlet 13.14. At this time, the fixing material is ejected not only from the tip of the jet bolt 1 but also at an angle corresponding to the intersection angle θ of the jet ejection port 14, so that it soaks into the ground while largely enveloping the entire outer circumference of the jet bolt 1. As a result, each jet bolt 1 has a large anchorage range on the ground.
なお、削孔長さが長い場合には第３図に示すようにジェ
ットボルト１の後端に次々と中間ロッド１５をカップリ
ング１６に接続しつつ削孔を行なうようにすることがで
きる。If the length of the hole to be drilled is long, the hole can be drilled while connecting intermediate rods 15 to the coupling 16 one after another at the rear end of the jet bolt 1, as shown in FIG.
そして、ジェットボルト１が完全に打込まれたならば、
スイベルサブ２をジェットボルト１から外してジェット
ボルト１をそのまま埋め殺してもよいし、またジェット
ボルト１をともに引き抜き、代わりに鉄筋あるいはこれ
に代わる補強材を埋設するようにしてもよい。And if jet bolt 1 is completely driven in,
The swivel sub 2 may be removed from the jet bolt 1 and the jet bolt 1 may be buried as is, or the jet bolt 1 may be pulled out together and a reinforcing bar or a reinforcing material may be buried in its place.
また、ジェット噴出口１３の圧入用孔１１に対する交叉
角度θは３０°ないし４０°、あるいはそれ以上又はそ
れ以下であってもよく、要は定着材が削孔された地盤内
にしみ込み易い角度に設定すればよい。In addition, the intersection angle θ of the jet outlet 13 with respect to the press-fitting hole 11 may be 30° to 40°, or more or less than that, and the key is an angle that allows the fixing material to easily penetrate into the ground where the hole is drilled. You can set it to .
次に第４図は前記ジェットボルト１の第２実施例を示す
ものである。Next, FIG. 4 shows a second embodiment of the jet bolt 1.
このジェットボルト１は、薄肉中空バイ１１００の後端
部に雌ネジ部１０１を形成し、前記カップリング１６を
介して前記スイベルサブ２に接続する。またボルト先端
側に硬質金属からなるチップ１０２を溶接１０３によっ
て固定したものである。該チップ１０２の先端部１０２
ａは前記と同様にコーン形に形成されているとともに、
その中空内には大径の孔１０２ｂを形成し、さらにその
先端に該大径孔１０２ｂと連通ずるジェットボルト噴出
口１０２ｃ、１０２ｄを先端に向けて間口形成したもの
である。This jet bolt 1 has a female threaded portion 101 formed at the rear end of a thin hollow via 1100, and is connected to the swivel sub 2 via the coupling 16. Further, a tip 102 made of a hard metal is fixed to the tip end of the bolt by welding 103. The tip 102 of the tip 102
a is formed into a cone shape as before, and
A large-diameter hole 102b is formed in the hollow space, and jet bolt outlets 102c and 102d communicating with the large-diameter hole 102b are formed at the tip thereof toward the tip.
この実施例では、比較的安価な薄肉パイプ１００を用い
ることができるので、安価に構成できる。In this embodiment, a relatively inexpensive thin-walled pipe 100 can be used, so that the structure can be constructed at low cost.
次に第５図は前記第２実施例の変形例を示すもので、薄
肉バイブ１００の外周には複数のリング状のアンカ一部
１０５が溶接などによって固定されている。Next, FIG. 5 shows a modification of the second embodiment, in which a plurality of ring-shaped anchor parts 105 are fixed to the outer periphery of the thin-walled vibrator 100 by welding or the like.
この変形例においては、アンカ一部１０５が引扱き方向
に対する抵抗となるために、これを埋め殺した場合に強
固な保持強度を得ることになる。In this modification, since the anchor portion 105 acts as a resistance against the handling direction, a strong holding strength is obtained when the anchor portion 105 is completely buried.
（発明の効果）
以上各実施例で詳細に説明したように、この発明に係る
自穿孔ボルトによれば、地盤を穿孔しながら定着材をジ
ェットボルト外周の地盤内に浸透させることができるた
めに、崩壊しやすい地盤の定着作業が短縮でき、かつボ
ルト周辺地盤の改良効果が高く工期、工費とも大幅に箇
減できる。(Effects of the Invention) As explained in detail in each of the embodiments above, according to the self-drilling bolt according to the present invention, the fixing material can be infiltrated into the ground around the jet bolt while drilling the ground. , it can shorten the work of fixing the ground that is prone to collapse, and it is highly effective in improving the ground around the bolts, resulting in a significant reduction in construction time and construction costs.
第１図、第２図（ａ）、（ｂ）、第３図はこの発明の第
１実施例を示し、第１図は全体図、第２図（ａ）は第１
図のＡ部拡大図、同図（ｂ）はジェットボルトの外周の
一部拡大図、第３図はジエンｌ−ボルトに中間ボルトを
接続した状態を示す断面図、第４図はこの発明の第２実
施例によるジェットボルトの断面図、第５図は第２実施
例における変形例を示す断面図である。
１・・・ジェットポル１〜 １ａ・・・先端部３・・・
スイベル １１・・・定着材圧入用孔１３ 、
１４ 、１０２ｃ、１０２ｃｉ・・・ジェット噴出口３
１ｃ、３２ｂ・・・圧入孔1, 2(a), 3(b), and 3 show a first embodiment of the present invention, FIG. 1 is an overall view, and FIG. 2(a) is a first embodiment of the present invention.
Part A in the figure is an enlarged view, FIG. A sectional view of the jet bolt according to the second embodiment, and FIG. 5 is a sectional view showing a modification of the second embodiment. 1...Jet pole 1~1a...Tip part 3...
Swivel 11... fixing material press-fitting hole 13,
14, 102c, 102ci...Jet spout 3
1c, 32b...press-fit hole
Claims (1)
先端部コーン形をした内部中空のジェットボルトと、該
ジェットボルトの後端に着脱可能であって、液密かつ相
対回転自在に連結され、かつ前記中空内部に連通する定
着材圧入用のスイベルと、前記ジェットボルトの先端部
にあって、前記中空内部に同軸および放射状に連通する
複数のジェット噴射口とからなる自穿孔ボルト。(1) An internally hollow jet bolt with a cone-shaped tip to which impact, press-fitting, rotation, and vibration are applied from the rear end, and a jet bolt that is removable from the rear end of the jet bolt and is liquid-tight and relatively rotatable. A self-drilling bolt comprising a swivel for press-fitting a fixing material that is connected and communicates with the hollow interior, and a plurality of jet injection ports that are located at the tip of the jet bolt and communicate coaxially and radially with the hollow interior.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP61038360A JPH0672520B2 (en) | 1986-02-25 | 1986-02-25 | Self drilling bolts |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP61038360A JPH0672520B2 (en) | 1986-02-25 | 1986-02-25 | Self drilling bolts |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS62197599A true JPS62197599A (en) | 1987-09-01 |
| JPH0672520B2 JPH0672520B2 (en) | 1994-09-14 |
Family
ID=12523112
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP61038360A Expired - Lifetime JPH0672520B2 (en) | 1986-02-25 | 1986-02-25 | Self drilling bolts |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0672520B2 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH03110292A (en) * | 1989-09-25 | 1991-05-10 | Shigeki Nagatomo | Solidification of natural ground |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5736215A (en) * | 1980-08-14 | 1982-02-27 | Japanese National Railways<Jnr> | Pipe anchoring work for soft ground |
| JPS58199999A (en) * | 1982-05-18 | 1983-11-21 | 大成建設株式会社 | Anchoring method |
-
1986
- 1986-02-25 JP JP61038360A patent/JPH0672520B2/en not_active Expired - Lifetime
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5736215A (en) * | 1980-08-14 | 1982-02-27 | Japanese National Railways<Jnr> | Pipe anchoring work for soft ground |
| JPS58199999A (en) * | 1982-05-18 | 1983-11-21 | 大成建設株式会社 | Anchoring method |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH03110292A (en) * | 1989-09-25 | 1991-05-10 | Shigeki Nagatomo | Solidification of natural ground |
Also Published As
| Publication number | Publication date |
|---|---|
| JPH0672520B2 (en) | 1994-09-14 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| EXPY | Cancellation because of completion of term |