JP4296238B2

JP4296238B2 - Rock bolt construction method, drilling length measuring device after completion of construction and construction method using this material

Info

Publication number: JP4296238B2
Application number: JP2003160107A
Authority: JP
Inventors: 忠夫岸本
Original assignee: 忠夫岸本
Priority date: 2003-04-30
Filing date: 2003-04-30
Publication date: 2009-07-15
Anticipated expiration: 2023-04-30
Also published as: JP2004332502A

Description

【０００１】
【産業上の利用分野】
この発明は、斜面の補強土工法、トンネル切羽部補強等に使用されるロックボルト（ロックアンカー）を地中へ打設後、ロックボルトの中空部分へ、本発明の資材を請求項４の手順通り、閉塞した先端部より順次組立て挿入、削孔した坑内とロックボルトへグラウト材を注入、充填しても、本発明の資材のパイプ中空部内にグラウト材が侵入しない為、検査時地上へ吐出している蓋をはずすことで削孔長の確認が簡単に行えることと、手抜き工事の防止ができ、設計図書通りの施工ができる削孔長計測装置の資材と斜面安定工法に関するものである。
【０００２】
【従来の技術】
従来、斜面の補強土工法等で用いられる工法として、鋼材の中が中空になっている自穿孔ロックボルト工法と、異形棒鋼鉄筋工法が現在施工されている。
【０００３】
Ａ、自穿孔ロックボルト工法は、削孔時には先端にビットを取付け、自体はロッドの役割をなし、削岩機を使用して削孔、しかる後ロッド中空内からグラウト材を注入、先端ビットより削孔内へ充填養生し、地中へ固定定着させる。
Ｂ、異形棒鋼鉄筋工法は、削孔専用ロッドの先端へビット取付け、削岩機を使用して削孔後、専用ロッドとビットを引き抜き異形棒鋼鉄筋を挿入、その周囲からグラウト材を注入充填施工をして養生し、地中へ固定定着させる。
【０００４】
【発明が解決しようとする課題】
ところで、前記した従来のロックボルト工法では以下のような問題点がある。
【０００５】
ａ、自穿孔ロックボルト工法では削孔後、グラウト材をロッド中空内より注入し、先端ビットから削孔坑内にあるズリを排出し、地上へ流れ出て確実に固定する、しかし、この方法でロックボルトを固定すればロックボルト中空内と削孔坑内へグラウト材が充満するため、削孔長の確認が無理となる。
【０００６】
ｂ、異形棒鋼鉄筋工法では専用ロッドを用いて削孔後、専用ロッドを引き抜き、異形棒鋼鉄筋を挿入した後、グラウト材を鉄筋と坑内の間から注入固定するが、削孔長の確認が無理となる。
【０００７】
上記、いずれの工法も削孔長の確認が無理であり、地盤が玉石混じり、亀裂の多い岩盤等、削孔が困難である個所では設計削孔長まで施工をしなくともロックボルトを切断し、グラウト材を注入することで固定埋設し、隠蔽されるため検査時の発見が困難であった。
【０００８】
【課題を解決しようとする手段】
上記のような課題を解決するため、請求項１の発明は、所定の寸法長と所定の寸法径を有したパイプの一方の先端部を閉塞し、その先端部はロックボルト中空内の中心部へ収まるよう、所定の寸法を有した、環形状の円板面を扇形にしたスペーサーをパイプの縦方向の任意の位置へ段違いに形成し、延長するためにパイプのもう一方の端部の外周面に、任意の位置へ所定の寸法で雄螺子を形成した構成を採用したものである。
【０００９】
請求項２の発明は、延長用のロッドでありパイプの両端へ所定の寸法で雄螺子を形成した構成を採用したものである。
【００１０】
請求項３の発明は、請求項１に記載の資材と請求項２の資材を連結をするためと、請求項２の資材同士の連結をするために、所定の寸法径を有するパイプの内面へ、請求項１の雄螺子が合致するように所定の寸法で雌螺子を形成し、ロックボルト中空内の中心部へ収まるように、その外周面へ、所定の寸法を有した環形状の円板面を扇形にしたスペーサーを、パイプの縦方向の任意の位置へ段違いに形成した構成を採用したものである。
【００１１】
請求項４の発明は、地中へロックボルトを任意の深さで削孔、挿入したロックボルトの中空部へ、請求項１の資材の閉塞されている先端部から挿入、反対側の端部に形成された雄螺子部へ、請求項３の資材に形成された雌螺子を約２分の１まで捩じ込む、また削孔長が深ければロックボルトの削孔長に合わせ、請求項２の延長用資材に形成さた雄螺子を、請求項３の資材の雌螺子部へ順次、捩じ込み任意の長さまで継ぎたし、ロックボルトの中空部より所定の寸法で、出ている部分へ請求項２の資材の雄螺子へ内径が雌螺子加工を形成した螺子蓋を取付け、本発明の資材の中空部を密閉する、しかる後、ロックボルトの中空部からグラウト材を注入、地山とロックボルトと本発明の資材を固定する、パイプが密閉されている効果で本発明の資材の中空部分にはグラウト材が充填されない、検査時に蓋を取外しその中空部分へピアノ線等の計測器具を挿入、削孔長を計測できる構成を採用したものである。
【００１２】
【実施例】
以下、この発明の実施の形態を示図例と共に説明する。
【００１３】
図１は、ロックボルト中空部へ挿入される、計測装置のパイプ深層部（Ａ）の形態を示し、最深部は閉塞（１）され、ロックボルト中空内の中心部へ収まるように、その外周面へ所定の寸法を有した、環形状の円板面を扇形にしたスペーサー（５）を、パイプの縦方向の任意の位置へ段違いに形成し、反対側の端部は請求項２の資材を連結するための雄螺子（２）が形成されている形態を示す。
【００１４】
図１、図３の（６）は螺旋形状のスペーサーの形態を示す。
【００１５】
図２は、計測装置の延長用パイプ（Ｂ）の形態を示し、連結できるように両端部を雄螺子（２）が形成されている形態を示す。
【００１６】
図３は、図１と図２を連結する資材（Ｃ）であり、また図２同士を連結する資材でもある、パイプの内周面へ雌螺子（３）を形成し、自穿孔ロックボルト中空内の中心部へ収まるよう、その外周面へ所定の寸法を有した環形状の円板面を扇形にしたスペーサーをパイプの縦方向の任意の位置へ、段違いに形成した形態を示す。
【００１７】
図４は、図１の資材の雄螺子に図３の資材の雌螺子を捩じ込んで取付け、図２の資材を同じよう取付け、所定の寸法まで延長し、その端部へ螺子蓋（Ｄ）を取付けた形態を示す。
【００１８】
図５は、ロックボルト中空部へ挿入される、計測装置のパイプ深層部（Ａ）の形態を示し、最深部は閉塞（１）されロックボルト中空内の中心部へ収まるように、その外周面に所定の寸法を有した、環形状の円板面を扇形にしたスペーサー（５）を、パイプの縦方向の任意の位置へ段違いに形成された形態を示す。
【００１９】
図１、図３、図５、図７の（６）は本発明の資材（Ａ）と（Ｂ）へ、環形状の円板面を扇形にしたスペーサーの代りに、螺旋形状のスペーサー（６）を形成した形態を示す。
【００２０】
図６は、計測装置の延長用パイプ（Ｂ）の形態を示す。
【００２１】
図７は、図５と図６を連結する資材（Ｃ）であり、その形態はロックボルト中空内の中心部へ収まるよう、その外周面へ所定の寸法を有した環形状の円板面を扇形にしたスペーサー（５）を、パイプの縦方向の任意の位置へ段違いに形成された、形態を示す。
【００２２】
図８は、図５の資材へ図７の資材を接着剤等を使用して取付け、図６の資材を同じく取付け、所定の寸法まで延長し、その部分へ蓋（Ｄ）を取り付けた形態を示す。
【００２３】
【発明の効果】
以上のように、この発明は、上記のような構成としたので、以下に列記する効果がある。
【００２４】
この発明は、自穿孔ロックボルトを対象とし、ロックボルトの中空部の中心部へ収まるよう、所定の寸法を有した、環形状の円板面を扇形に形成したスペーサーを、パイプの縦方向の任意の位置へ、段違いに形成した効果から、ロックボルトの中空部の中心部に設置できることができ、また、段違いスペーサーの間隙から削孔坑内へグラウト材の注入充填が可能になり、ロックボルト中空内に本発明の資材とグラウト材の層ができ、本来のロックボルトの強度に本発明の資材の強度が加算される。
【００２５】
異形棒鋼鉄筋工法等で、鋼材が中空になっていない場合、ロックボルトと削孔坑内がグラウト材で定着固定され、その周辺摩擦抵抗による抑止力の計算によって、本発明の資材をロックボルトと削孔坑内の間に挿入し、定着することができる。
【００２６】
従来、検査時、地中に埋設されたロックボルトの削孔長の計測が無理であったが、自穿孔ロックボルトと本発明の資材を傾斜地の補強、トンネル切羽部補強、建設物（ビルの基礎の補強、橋脚基礎の補強）等で使用することによって、検査時、ロックボルト削孔長の確認が安い単価で容易にでき、手抜き工事（削孔時施工困難の時ロックボルトの切断・非常に多い）を防止することができる。
【００２７】
螺旋形状のスペーサー（６）も、その間隙からグラウト材が削孔坑内へ充填できる効果がある。
【００２８】
本発明の工法は、ピアノ線を挿入した装置を削孔長の長い、永久アンカー工法のアンカーテンドン内に組み込むことで、施工後ピアノ線を引き抜くだけで削孔長の確認ができる。
【図面の簡単な説明】
【図１】（Ａ）は、この発明に係る深層部資材の縦断正面図を示し、（Ａ’）はその断面図を示す。
【図２】（Ｂ）は、この発明に係る延長用パイプの縦断正面図を示し、（Ｂ’）はその断面図を示す。
【図３】（Ｃ）は、この発明に係る資材（Ａ）と（Ｂ）又（Ｂ）と（Ｂ）を連結する資材の縦断正面図を示し、（Ｃ’）はその断面図を示す。
【図４】（Ａ）の資材と（Ｂ）の資材を（Ｃ）の資材で連結し、（Ｂ）の資材を連結延長する方法の縦断正面図を示し、上記第１図から第３図までは螺子を使用した連結方法を示したものである。
【図５】（Ａ）は、この発明に係る深層部資材の縦断正面図示し、（Ａ’）は、その断面図を示す。
【図６】（Ｂ）は、この発明に係る延長用パイプの縦断正面図を示し、（Ｂ’）その断面図を示す。
【図７】（Ｃ）は、この発明に係る資材（Ａ）と（Ｂ）又（Ｂ）と（Ｂ）を内径へ挿入連結する資材の縦断正面図を示し、（Ｃ’）はその断面図を示す。
【図８】（Ａ）の資材と（Ｂ）の資材を（Ｃ）の資材で連結し、（Ｂ）の資材を連結延長する方法の縦断正面図を示し、上記第５図から第７図までの接着剤等を使用した連結方法を示したものである。
【図９】本発明の資材と地中へロックボルト削孔坑内へ挿入、しかる後、グラウト材を充填した、施工完了の縦断正面図。
【符号の説明】
１先端閉塞部
２雄螺子
３雌螺子
４ピアノ線等の計測器具を挿入する中空部
５環形状の円板面を扇形にしたスペーサー
６螺旋形状のスペーサー
８グラウト材
９斜面及び地中[0001]
[Industrial application fields]
According to the present invention, the material of the present invention is applied to the hollow portion of the lock bolt after the rock bolt (lock anchor) used for the earth reinforcement method of the slope, the reinforcement of the tunnel face, etc. is driven into the ground. As the grout material does not penetrate into the hollow portion of the pipe of the present invention even if the grout material is injected into and filled from the closed and sequentially drilled pit and the rock bolt, it is discharged to the ground at the time of inspection. It is related to the material and the slope stabilization method of the drilling length measuring device that can easily check the drilling length by removing the lid, and prevent the punching work and can perform the construction as designed.
[0002]
[Prior art]
Conventionally, a self-drilling lock bolt method in which the inside of a steel material is hollow and a deformed bar steel bar method are currently being constructed as methods for use in a sloped earth reinforcement method.
[0003]
A. The self-drilling lock bolt method attaches a bit to the tip at the time of drilling, itself plays the role of a rod, drills holes using a rock drill, and then injects grout material from inside the rod hollow, from the tip bit Fill and harden into the drilling hole and fix it in the ground.
B, the deformed bar steel reinforcement method is to attach a bit to the tip of the dedicated rod for drilling, drill a hole using a rock drill, pull out the dedicated rod and bit, insert a deformed rod steel rod, and inject grout material from the surroundings. To cure and fix to the ground.
[0004]
[Problems to be solved by the invention]
By the way, the above-described conventional lock bolt method has the following problems.
[0005]
a. In the self-drilling lock bolt method, after drilling, grout material is injected from the inside of the rod hollow, the gap in the drilling hole is discharged from the tip bit, and it flows out to the ground and is fixed securely. If the bolt is fixed, the grout material will be filled into the lock bolt hollow and the borehole, making it impossible to confirm the bore length.
[0006]
b. In the deformed bar steel bar method, after drilling with a dedicated rod, after pulling out the dedicated rod and inserting the deformed bar steel bar, the grout material is injected and fixed between the rebar and the inside of the shaft, but the drilling length cannot be confirmed. It becomes.
[0007]
In any of the above methods, it is impossible to check the drilling length, and in places where drilling is difficult, such as when the ground is mixed with boulders or rocks with many cracks, the lock bolts are cut without having to construct the designed drilling length. It was difficult to find at the time of inspection because it was fixed and buried by injecting grout material.
[0008]
[Means to solve the problem]
In order to solve the above-described problems, the invention of claim 1 closes one tip portion of a pipe having a predetermined dimensional length and a predetermined dimensional diameter, and the leading end portion is a central portion in a lock bolt hollow. The outer circumference of the other end of the pipe is formed in a stepwise manner at any position in the longitudinal direction of the pipe and extended with a ring-shaped disc-shaped spacer having a predetermined dimension so that it fits in A configuration in which a male screw is formed on a surface with a predetermined size at an arbitrary position is adopted.
[0009]
The invention of claim 2 is an extension rod, and adopts a configuration in which male screws are formed at both ends of the pipe with predetermined dimensions.
[0010]
In order to connect the material according to claim 1 and the material according to claim 2 and to connect the materials according to claim 2, the invention according to claim 3 is applied to the inner surface of a pipe having a predetermined dimensional diameter. An annular disk having a predetermined dimension is formed on the outer peripheral surface of the lock bolt so that the female thread is formed with a predetermined dimension so that the male screw of claim 1 is matched, and is fitted in the center of the lock bolt hollow. A configuration in which spacers having a fan-shaped surface are formed in steps at arbitrary positions in the longitudinal direction of the pipe is adopted.
[0011]
According to the invention of claim 4, the lock bolt is drilled into the ground at an arbitrary depth and inserted into the hollow portion of the inserted lock bolt from the closed end of the material of claim 1, the opposite end The female screw formed in the material of claim 3 is screwed into the male screw part formed to about 1/2, and if the drilling length is deep, it matches the drilling length of the lock bolt. The male screw formed in the extending material is sequentially screwed into the female screw portion of the material according to claim 3 and spliced to an arbitrary length, and the portion protruding from the hollow portion of the lock bolt with a predetermined dimension A screw lid having an internal thread formed on the male screw of the material of claim 2 is attached to the male screw of the material to seal the hollow portion of the material of the present invention, and then grout material is injected from the hollow portion of the lock bolt. The lock bolt and the material of the present invention are fixed, and the effect of the present invention is that the pipe is sealed. The hollow portion of the grout material is not filled, insert the measurement instrument piano wire or the like to the hollow part removed cover during inspection, is obtained by employing the structure that can measure the drilling length.
[0012]
【Example】
Embodiments of the present invention will be described below with reference to the drawings.
[0013]
FIG. 1 shows the form of the pipe deep layer (A) of the measuring device inserted into the hollow part of the lock bolt, and the outermost part of the deepest part is closed (1) and fits in the central part of the lock bolt hollow. The spacer (5) having a fan-shaped ring-shaped disk surface having a predetermined dimension on the surface is formed stepwise at an arbitrary position in the longitudinal direction of the pipe, and the opposite end is the material of claim 2 The form in which the male screw (2) for connecting is formed is shown.
[0014]
FIG. 1 and FIG. 3 (6) show the form of a spiral spacer.
[0015]
FIG. 2 shows a form of the extension pipe (B) of the measuring device, and shows a form in which male screws (2) are formed at both ends so that they can be connected.
[0016]
FIG. 3 is a material (C) for linking FIG. 1 and FIG. 2, and also a material for linking FIG. 2. A female screw (3) is formed on the inner peripheral surface of the pipe, and a self-drilling lock bolt is hollow. The form which formed in the vertical direction of the pipe the step which formed the spacer which made the ring-shaped disk surface which has a predetermined dimension into the central part in the inner part in the vertical direction of a pipe is shown.
[0017]
FIG. 4 shows that the female screw of the material of FIG. 3 is screwed into the male screw of the material of FIG. 1, the material of FIG. 2 is similarly attached, extended to a predetermined dimension, and a screw lid (D ) Is shown.
[0018]
FIG. 5 shows the configuration of the pipe deep layer portion (A) of the measuring device, which is inserted into the lock bolt hollow portion, and the outermost surface thereof so that the deepest portion is closed (1) and fits in the center portion in the lock bolt hollow portion. Fig. 5 shows a form in which a spacer (5) having a predetermined dimension and having a ring-shaped disk surface in the shape of a fan is formed stepwise at an arbitrary position in the longitudinal direction of the pipe.
[0019]
1, 3, 5, and 7 (6), the material of the present invention (A) and (B) is replaced with a spiral spacer (6 ) Is shown.
[0020]
FIG. 6 shows the form of the extension pipe (B) of the measuring device.
[0021]
FIG. 7 is a material (C) connecting FIG. 5 and FIG. 6, and an annular disk surface having a predetermined dimension is provided on the outer peripheral surface of the material (C) so as to fit in the center of the lock bolt hollow. The form which formed the spacer (5) made into the fan shape in steps in the arbitrary positions of the longitudinal direction of a pipe is shown.
[0022]
FIG. 8 shows a form in which the material of FIG. 7 is attached to the material of FIG. 5 using an adhesive, the material of FIG. 6 is similarly attached, extended to a predetermined dimension, and a lid (D) is attached to that part. Show.
[0023]
【The invention's effect】
As described above, the present invention has the above-described configuration, and therefore has the effects listed below.
[0024]
The present invention is directed to a self-drilling lock bolt, and a spacer having a predetermined dimension and having a ring-shaped disk surface formed in a fan shape so as to fit in the central portion of the hollow portion of the lock bolt, Due to the effect of forming a step at an arbitrary position, it can be installed in the center of the hollow part of the rock bolt, and it becomes possible to inject and fill grout material from the gap of the stepped spacer into the borehole. A layer of the material of the present invention and a grout material is formed, and the strength of the material of the present invention is added to the strength of the original rock bolt.
[0025]
If the steel material is not hollow due to the deformed bar steel reinforcement method, etc., the lock bolt and the borehole will be fixed and fixed with grout material, and the material of the present invention will be cut with the lock bolt by calculating the deterrent force due to the peripheral friction resistance. It can be inserted and fixed between the boreholes.
[0026]
Conventionally, it was impossible to measure the drilling length of rock bolts buried in the ground at the time of inspection, but self-drilling lock bolts and materials of the present invention were used to reinforce slopes, tunnel face reinforcements, and buildings (buildings). By using it for reinforcement of foundations, reinforcement of pier foundations, etc., it is possible to easily check the drilling length of rock bolts at a low price during inspection. Can be prevented.
[0027]
The spiral spacer (6) also has an effect that the grout material can be filled into the borehole from the gap.
[0028]
The construction method of the present invention can confirm the drilling length by simply pulling out the piano wire after construction by incorporating the device into which the piano wire has been inserted into the long curtain length of the permanent anchor construction uncurtain dong.
[Brief description of the drawings]
FIG. 1A is a longitudinal front view of a deep layer material according to the present invention, and FIG. 1A is a sectional view thereof.
2B is a longitudinal front view of the extension pipe according to the present invention, and FIG. 2B is a cross-sectional view thereof.
FIG. 3C is a longitudinal front view of a material connecting the materials (A) and (B) or (B) and (B) according to the present invention, and (C ′) is a sectional view thereof. .
FIG. 4 shows a longitudinal front view of a method of connecting the material of (A) and the material of (B) with the material of (C) and extending the connection of the material of (B), from the above FIG. 1 to FIG. Up to this point, a connection method using screws is shown.
5A is a longitudinal front view of a deep layer material according to the present invention, and FIG. 5A is a cross-sectional view thereof.
6B is a longitudinal front view of the extension pipe according to the present invention, and FIG. 6B is a cross-sectional view thereof.
7 (C) is a longitudinal front view of the material (A) and (B) or (B) and (B) inserted into and connected to the inner diameter according to the present invention, and (C ′) is a cross-sectional view thereof. The figure is shown.
FIG. 8 shows a longitudinal front view of a method of connecting the material of (A) and the material of (B) with the material of (C) and connecting and extending the material of (B); The connection method using the adhesive etc. up to is shown.
FIG. 9 is a longitudinal front view of the completion of construction, in which the material of the present invention and the ground are inserted into a rock bolt drilling hole, and then filled with a grout material.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 End obstruction | occlusion part 2 Male screw 3 Female screw 4 The hollow part 5 which inserts measuring instruments, such as a piano wire, The spacer 6 which made the ring-shaped disk surface the fan shape 6 The spiral-shaped spacer 8 Grout material 9 Slope and underground

Claims

To the outer peripheral surface of one end portion of a pipe having a predetermined dimension length and a predetermined dimension diameter, a spacer having a ring-shaped disk surface having a predetermined dimension as a fan shape is moved to an arbitrary position in the longitudinal direction of the pipe. Lock bolt drilling length measuring device material that is formed in steps, closes the tip of the pipe, and forms a male screw with a predetermined dimension at the other end of the pipe.