JPH10205298A - Drilling filling method of grout and pulling device of grouting hose - Google Patents

Abstract

PROBLEM TO BE SOLVED: To control the reduction of channel area of grout by simplifying the constitution of a grouting hose in grouting work to a boring for installing an anchor material, develop a holding device capable of being surely held and to obtain grout filling technology capable of being surely filled in the boring by pulling out smoothly the grouting hose by means of the holding device. SOLUTION: At least two holding pins 14 and 15 provided at an interval capable of passing through a grouting hose 8 and a tensile section 12 provided in a proper site are provided. By pulling the tensile section 12 in the pulling direction of the grouting hose 8, the hose 8 is bent one holding pin 14, and the grout can be filled by gradually pulling the hose 8 out from the boring 6 while holding the grouting hose 8 with frictional force with the holding pins 14 and 15 and grouting hose 8 by the reaction force from the bending of the grouting hose.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for drilling holes formed in the ground when installing anchor materials such as rock bolts on the ground in tunnel construction or slope stabilization construction by a new Austrian tunnel construction method or the like. The present invention relates to a grout hole filling method for filling a grout material in advance, and a grout material injection hose drawing device used in the method.

[0002]

2. Description of the Related Art Conventionally, as a method of installing a rock bolt on the ground in this kind of tunnel construction or slope stabilization work, a grout material such as mortar or cement paste is filled in advance in a drilled hole formed in the ground. Beforehand, there is known a method in which a rock bolt is driven in before the hardening to fix the grout material to the ground. And
As a method of filling the grout material into the drilling hole, insert the grouting material injection hose all the way to the back of the drilling hole, gradually inject the grout material from the tip thereof, while grasping the injection hose manually, gradually. A filling method is known in which the grout material is filled from the inside of a drilled hole by extracting the grout material. However, since the conventional operation of pulling out the injection hose was performed while manually gripping the injection hose, it was difficult to securely hold the injection hose, and it was difficult to smoothly pull out the injection hose at a constant speed. . If the pulling speed of the injection hose is too high, the filling state may be uneven and voids may easily occur, which may hinder the anchoring state of the anchor material. On the other hand, if the drawing speed is too slow, the grout material wraps around the gap between the hole and the injection hose, making it difficult to pull out, and in some cases, the filling operation has to be interrupted. In particular, in tunnel construction, there is a place where the anchor material is installed vertically, so it is necessary to inject the grout material in a hardened state to some extent so that the filled grout material does not flow down. There was a great technical difficulty in filling every corner accurately.

[0003]

DISCLOSURE OF THE INVENTION The present invention has been made in view of the above-mentioned conventional technical circumstances, and is suitable for a work of pulling out an injection hose from a drilled hole and reliably realized by a simple structure. An object of the present invention is to develop a gripping means for a gripping injection hose, and to provide a grouting material filling technique capable of accurately filling a drill hole by smoothly pulling out the injection hose using the gripping means. It is assumed that.

[0004]

SUMMARY OF THE INVENTION In order to solve the above-mentioned problems, the present invention is directed to a grouting material injection method for injecting a grout material having flexibility to a depth of a hole formed in the ground for installing an anchor material such as a lock bolt. Inserting a hose for insertion, inserting an appropriate portion of the injection hose exposed outside the drilled hole between at least two gripping pins, and pulling a tension portion provided at an appropriate portion to pull the hose. In a state where the injection hose is gripped via the two gripping pins by bending the injection hose around one of the gripping pins, while pouring the grout material from the tip of the injection hose, Technical means was employed in which the grout material was filled in the drilled holes by gradually pulling out the injection hose through the tension portion. As a result, a reliable gripping state of the injection hose can be obtained with a simple configuration,
By pulling out through the tension portion, a smooth pulling-out operation can be easily obtained, and the grout material can be accurately filled to every corner of the drilled hole. Therefore, a reliable installation state of the anchor member can be obtained. In addition, since the injection hose can be gripped simply by bending it in a curved shape, the amount of crushing is extremely small, and a large gripping force can be obtained without hindering the flow of the grout material. further,
Since the holding position is not restricted at all, and the holding is very easy, it is very effective for a mechanical pulling-out operation performed by repeatedly updating the holding position. Therefore, the workability can be improved by mechanically pulling out the injection hose by using an advance / retreat mechanism for advancing / retracting a drilling tool provided in the drilling machine. In addition, at least one gripping pin is provided with an upper support member capable of abutting on the upper portion of the injection hose to prevent the injection hose from being detached or to prevent the injection hose from being crushed by bending, or between the gripping pins. By adding an auxiliary pin for imparting an initial bending deformation to the inserted injection hose, the gripping means is held to the injection hose even when no tensile force is applied. Or you can.

[0005]

DESCRIPTION OF THE PREFERRED EMBODIMENTS As described above, the present invention can easily and securely grip an injection hose and can perform mechanical drawing work. Therefore, the present invention is applicable to tunnel construction using a hardened grout material. Although it is particularly effective, it is needless to say that the present invention can also be applied to ground stabilization work on a slope. In addition, the method of inserting the anchor material after the grout material is filled in the drilled hole in advance can be applied not only to the lock bolt but also to the installation work of an appropriate anchor material made of various types of uncurtain don. In addition, as an actual drawing form, it is general to gradually pull out at a predetermined speed so that the grout material does not flow between the injection hose and the drill hole in accordance with the grout material injection speed, but it is generally appropriate. In mechanical withdrawal work using a device, withdrawal should be made with the grout material slightly wrapped between the injection hose and the drilled hole because the withdrawal force is large and the removal speed can be controlled reliably. Thereby, a more reliable filling state can be obtained. Furthermore, a form in which the grout material is intermittently pulled out after waiting for the grout material to flow between the injection hose and the hole is also possible. Although the present invention is particularly effective in the case of a mechanical pull-out operation, it is also effective as a simple and strong gripping means for the injection hose in the case of manual pull-out.

The means for gripping the injection hose according to the present invention comprises at least two gripping pins provided at intervals so that the injection hose can be inserted, and a tension portion provided at an appropriate position. Is pulled in the pull-out direction of the injection hose, whereby the injection hose is bent with one gripping pin as a fulcrum, and the injection hose is gripped by the frictional resistance between each gripping pin and the injection hose due to the reaction force. It is. Therefore, the injection hose itself does not require any processing, and can be freely changed and is extremely simple, so that the workability of pulling out the injection hose can be greatly improved and regardless of the strong gripping force. Damage to the injection hose can be prevented. In addition, the bending amount of the injection hose increases or decreases according to the magnitude of the pulling force. Usually, the bending amount is approximately a right angle and the bending range which does not hinder the flow of the grout material is sufficient. When the hose is bitten and becomes extremely difficult to be pulled out, it can cope with an extremely strong pulling force by bending the injection hose until it is folded.

[0007] The gripping pin may be a columnar body having a circular or polygonal cross section, or may be an arcuate or polygonal shape only in contact with the injection hose. Further, the outer shape in the axial direction may be a straight shape or a shape in which an arc-shaped concave portion is formed according to the shape of the contact surface of the injection hose. Furthermore, the state of the outer surface of the pin for gripping is
In addition to the planar one, the one having unevenness to increase the coefficient of friction with the injection hose may be used. Therefore, it is one measure to apply deformed reinforcing bars. The pulling device only needs to have at least two gripping pins arranged at a distance that allows the injection hose to be inserted, and the gripping pins may be integrally formed, It can be erected through a base having a shape or the like. Further, a tension portion is provided at an appropriate position with respect to the gripping pin. The installation site of the pulling portion may be any portion that can bend the injection hose with one of the gripping pins as a fulcrum by pulling the pulling portion, and the bending strength of the injection hose, Considering the magnitude of the frictional force between the injection hose and the gripping pin required for the gripping force and the bending angle, especially considering the effect of the bending on the flow area of the grout material, appropriate bending What is necessary is just to set to the appropriate part which can give a moment. As a specific form of the pulling portion, an opening portion is formed, a wire rope is connected, and the wire rope is connected to the pulling mechanism side through the wire rope, or the pulling portion is rotated through a connecting pin. It is possible to connect to the pulling mechanism side via a connecting member that is connected as much as possible, or to attach a grip to the pulling portion so that it can be easily pulled by human power. There is no particular restriction on the shape of the base, and a rectangular shape or an elliptical shape can be selected.However, in the case of adopting a form of forming a substantially triangular shape connecting both gripping pins and a tension portion, The triangular shape changes depending on the position of the pulling portion with respect to both gripping pins. Further, when the tension portion is located near an extension line connecting the two gripping pins, a rod-shaped base can be used as the base.

Further, by providing at least one of the gripping pins with an upper supporting member capable of abutting on the upper part of the injection hose, the injection hose is prevented from being detached from between the gripping pins, and is also attached at the time of bending. The deformation of the injection hose can be suppressed by suppressing the deformation in the vertical direction. in this case,
The shape of the portion of the upper support member that comes into contact with the upper part of the injection hose may be a straight line extending horizontally, but the contact surface of the injection hose may be left inside, leaving a linear portion to allow horizontal movement of the injection hose. May be formed in accordance with the shape of the arc. Also, an auxiliary pin is installed in addition to the gripping pin,
The auxiliary pin imparts an initial bending deformation to the injection hose inserted between the gripping pins so that the gripping means is held against the injection hose even when no tensile force is applied. Can also be configured. In this case, the installation site of the auxiliary pin may be a site where the auxiliary pin is displaced to one side of the injection hose inserted between the gripping pins so that the gripping unit is bent so that the gripping unit does not slip off. Anywhere.

[0009]

Embodiments of the present invention will be described below with reference to the drawings. FIGS. 1 and 2 show an outline of a method of drilling and filling a grout material according to the present invention when applied to tunnel construction. FIG. 1 is a schematic explanatory view showing drilling work. FIG. 2 is a schematic explanatory view showing the filling operation of the grout material. In the drawing, reference numeral 1 denotes an example of a drilling machine, and an end portion of a boom 2 is provided with an advance / retreat mechanism 4 for advancing / retreating a drilling tool 3. When drilling holes 6 are formed in the ground 5 in order to install an anchor material such as a lock bolt, an appropriate drilling tool is used after positioning the advance / retreat mechanism 4 at a predetermined position as shown in FIG. Chuck part 7 holding 3
Are formed at predetermined positions while being advanced through a hydraulic cylinder or the like (not shown). The operation of the drilling machine 1 is performed on a bucket (not shown) or the like.

Drilled holes 6 are formed at respective installation positions,
When the operation shifts to the filling operation of the grout material into the drilled hole 6, the chuck portion 7 is retracted, the drilling tool 3 is pulled out from the drilled hole 6, and as shown in FIG. Insert the injection hose 8. As the injection hose 8, a hard plastic pipe or a hard rubber pipe having appropriate flexibility such as a polyethylene pipe is used, and is connected via a grout pump 9 so that the grout material can be pressure-fed. As shown in FIG. 2, a pulling device 10 as a gripping means is set at an appropriate intermediate position of the injection hose 8, and in this embodiment, the pulling device 10 is connected to the chuck portion 7 via a connecting member 11. As a result, the grout material is filled from the inside of the hole 6 while the injection hose 8 is mechanically pulled out using the advance / retreat mechanism 4.

FIGS. 3 to 5 show how to hold the injection hose 8 by the pulling-out device 10 and the pulling-out operation, which are features of the present invention, in order.
The cross section A is shown in an enlarged manner. As shown in the drawing, the pulling device 10 includes a substantially triangular plate-shaped base 1 having a tensile portion 12 having an opening to which the connecting member 11 is connected.
3 and two gripping pins 14 and 15 each having a columnar body with a circular cross-section, which are erected by welding or the like at an interval that allows the injection hose 8 to be inserted into the base 13. As shown in FIG. 6, an upper support member 16 is attached to one of the gripping pins 14 at a position where the upper supporting member 16 can come into contact with the upper part of the injection hose 8. By pressing down, it is possible to prevent detachment and suppress crushing deformation. The upper surface of the upper support member 16 is inclined so that the injection hose 8 can be easily inserted.

In order to fill the grout material from the inside of the drilled hole 6 while pulling out the injection hose 8 by using the pulling device 10, first, as shown in FIG. Is inserted between the gripping pins 14 and 15,
Thereafter, the connecting member 11 is moved to the advance / retreat mechanism 4 as shown in FIG.
Is connected to an appropriate portion of the chuck portion 7 of the above. At this time, the outer surface of the injection hose 8 has both gripping pins 14, 1 as shown in FIG.
If the base 13 is slightly tilted so as to abut on the base 5, the relative movement is prevented by the frictional resistance therebetween. If the chuck portion 7 is retracted by operating the advance / retreat mechanism 4 in this state, as shown in FIG. 4, the base 13 rotates and the injection hose 8 is further bent with one gripping pin 14 as a fulcrum. , Will enter a strong gripping state. Then, as the retraction of the chuck portion 7 proceeds, the injection hose 8
When the tensile force acting on the injection hose 8 further increases, and when the pull-out resistance acting between the injection hose 8 and the ground 5 is overcome, the extraction of the injection hose 8 is started as shown in FIG. Thereafter, when the required amount of withdrawal is completed, the advance / retreat mechanism 4 is stopped, the tensile force acting on the base 13 via the connecting member 11 is released, and the base 13 is returned to the state of FIG. Hold the injection hose 8 with the gripping pins 14 and 15
The pulling device 10 is manually pulled out from each other.
Can be easily removed. When the gripping position is changed by the pulling-out device 10 and the operation of pulling out the injection hose 8 is further continued, the gripping position is changed by removing the pulling-out device 10 as described above, or from the state of FIG. The holding position is changed by sliding back without removing the injection hose 8 and the holding pins 14 and 15 in a state where the contact between the injection hose 8 and the holding pins 14 and 15 is released, and the above-described pulling operation can be continued.

FIGS. 7 and 8 show another embodiment of the drawing device. Drawing device 1 according to the present embodiment
7, the connecting member 18 is different from the above-described embodiment in that the connecting pin 1
It has a feature in that it is connected to a tension portion 21 having an opening formed on the base 20 side through the base 9. In this embodiment, the direction of rotation of the base 20 is set opposite to that of the above embodiment.

FIG. 9 shows another embodiment relating to the gripping pin portion of the drawing device. In this embodiment, arc-shaped concave portions 24, 23 are provided at the contact positions of the holding pins 22, 23 with the injection hose 8 according to the outer shape of the injection hose 8.
25 is formed, and an arc-shaped portion is also formed on the lower surface of the upper support member 26 in accordance with the outer shape of the injection hose 8.

FIGS. 10 and 11 show another embodiment of the drawing device. The pulling-out devices 27 and 28 according to the present embodiment are different from the above-described embodiments in that
It is characterized in that auxiliary pins 31 and 32 for imparting initial bending deformation to the injection hose 8 are additionally provided in addition to the injection pins 9 and 30. As shown, the bending direction of the injection hose 8 changes according to the installation positions of the auxiliary pins 31 and 32. Regardless of the bending direction, any structure can be used as long as the injecting hose 8 abuts the two gripping pins 29 and 30 due to the bending deformation, the pulling devices 29 and 30 are held, and the falling can be prevented. .

Although the embodiments have been specifically described, the present invention is not limited to these embodiments. In short, at least two gripping pins provided at an interval at which the injection hose can be inserted and a tension portion provided at an appropriate portion are provided, and the tension portion is pulled in a pulling direction of the injection hose. A grout material is filled into the drilled hole while holding the injection hose by bending the injection hose with one gripping pin as a fulcrum, and holding the injection hose by the frictional resistance between each gripping pin and the injection hose due to the reaction force. Then, various changes can be made to the specific configuration. Incidentally, the specific installation site of the pulling portion may be any portion that can bend the injection hose with one of the gripping pins as a fulcrum by pulling the pulling portion. It is also possible to set the gripping pin itself as a tension portion. In addition, base 13,
As described above, it is possible to change the specific shape and the like of the pin 20, the gripping pins 14, 15, 22, 23, the upper support members 16, 26, and the like.

[0017]

According to the present invention, the following effects can be obtained. (1) Since the injection hose is gripped by bending it in a curved shape, the amount of deformation that the hose is crushed is small, and a strong gripping force can be easily obtained without hindering the flow of the grout material. And a smooth pull-out operation can be easily obtained. (2) There is no restriction on the holding position of the injection hose, and no processing is performed on the injection hose itself, so that the workability of pulling out the injection hose can be greatly improved, and the injection hose can be removed. Damage can be prevented. (3) Since it is extremely easy to change the holding of the injection hose, it is extremely effective particularly for a mechanical pull-out operation performed while repeatedly updating the gripping position. (4) With a simple configuration having at least two gripping pins and a tension portion, a reliable gripping state with respect to the injection hose can be obtained. (5) To improve the consistency of workability by mechanically pulling out an injection hose through the pulling portion using an advance / retreat mechanism for advancing / retracting a drilling tool provided in a drilling machine. Is possible. (6) If at least one of the gripping pins is provided with an upper supporting member capable of abutting on the upper portion of the injection hose, the injection hose is prevented from being detached from between the gripping pins, and the deformation in the vertical direction due to bending. To suppress the collapse of the injection hose. (7) If an auxiliary pin is provided in addition to the gripping pin, and the initial bending deformation is applied to the injection hose inserted between the gripping pins, no tensile force is applied. The holding device can also be held by the injection hose.

[Brief description of the drawings]

FIG. 1 is a schematic explanatory view showing a drilling operation.

FIG. 2 is a schematic explanatory view showing a filling operation of a grout material in the present invention.

FIG. 3 is a use state diagram of the drawing device according to the embodiment of the present invention.

FIG. 4 is a diagram illustrating a use state of the drawing device according to the embodiment of the present invention.

FIG. 5 is a use state diagram of the drawing device according to the embodiment of the present invention.

FIG. 6 is an enlarged sectional view taken along line AA in FIG.

FIG. 7 is a plan view showing another embodiment of the drawing device.

FIG. 8 is an elevation view of the embodiment.

FIG. 9 is an enlarged vertical sectional view showing another embodiment relating to a portion of a gripping pin of a drawing device.

FIG. 10 is a plan view showing another embodiment of the drawing device.

FIG. 11 is a plan view showing another embodiment of the drawing device.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 ... Drilling machine, 4 ... Retraction mechanism, 6 ... Drilling, 7 ... Chuck part, 8 ... Injection hose, 9 ... Grout pump, 10 ... Pull-out device, 11 ... Connection member, 12 ... Pulling part, 13 ... Base , 14, 15: gripping pin, 16: upper support member, 1
7 ... Pull-out device, 19 ... Connecting pin, 20 ... Base, 21
... pulling parts, 22, 23 ... gripping pins, 24, 25 ... recesses, 26 ... upper support members, 27, 28 ... pull-out devices, 3
1, 32 ... auxiliary pins

Claims (5)

[Claims] A grout material is filled into a drilled hole formed in the ground, and an anchor material such as a lock bolt is inserted and fixed before the grout material is cured. After the formation, a flexible grouting material injection hose is inserted into the drilled hole, and at least two appropriate portions of the injection hose exposed outside the drilled hole are gripped. The injection hose is bent through one of the gripping pins by inserting the hose between the pins, and by pulling a pulling portion provided at an appropriate position, thereby pulling the injection hose through the two gripping pins. In the gripped state, the grout material is filled into the drilled hole by gradually pulling out the grout material through the pulling portion while pouring the grout material from the tip of the grouting hose. A method for drilling and filling a grout material. 2. The injection hose is formed by forming a hole by a drilling machine and then pulling the pulling portion through an advance / retreat mechanism for advancing / retreating a drilling tool provided in the drilling machine. 2. The method for drilling and filling a grout material according to claim 1, wherein 3. An injection hose having at least two gripping pins provided at intervals so that a grout injection hose can be inserted therein and a tension portion provided at an appropriate position. The injection hose is inserted between the gripping pins, and the injection hose is bent by using one of the gripping pins as a fulcrum by pulling the tension portion. A grouting material injection hose pulling-out device, wherein the grouting material injection hose is pulled out while being held through a holding pin. 4. The apparatus according to claim 3, wherein each of the gripping pins is erected on a base, and at least one of the gripping pins is provided with an upper support member capable of contacting an upper portion of the injection hose. For grouting material injection hose. 5. The grout material injection according to claim 3, wherein an auxiliary pin for imparting initial bending deformation to the injection hose inserted between the gripping pins is added. Hose pulling device.