KR100467537B1 - Apparatus for putting steel pipe in the bored hole with boring ground and method of using thereof - Google Patents

Abstract

PURPOSE: A separable bit steel pipe grouting device of a bore and a steel pipe grouting method thereby are provided to reinforce the ground by connecting the steel pipe shoe to the end of the steel pipe without assembling the boring bit with the steel pipe and restricting driving force from being transmitted to the steel pipe, and to improve working efficiency by boring the ground and inserting the steel pipe at the same time. CONSTITUTION: A separable bit boring steel pipe grouting device is composed of a steel pipe(10) injecting grout with plural injection ports and having a strainer mounted around the injection port, a steel pipe shoe(20) connected to the end of the steel pipe and formed to be smaller than the end of the steel pipe, a rod(30) having a bit assembling part less than the bore of the steel pipe shoe and a section extension part extended from the bit assembling part and formed to be larger than the bore of the steel pipe shoe, and transmitting power in the steel pipe, and a boring bit(40) having a head part formed to be larger than the bore of the steel pipe shoe, connected to the bit assembling part of the rod and inserted to the steel pipe shoe, and a body extended from the head part and formed to be smaller than the bore of the steel pipe shoe to bore the ground by receiving power.

Description

Apparatus for putting steel pipe in the bored hole with boring ground and method of using Technical

The present invention relates to a bit-separable direct boring steel pipe grouting device and a direct boring steel pipe grouting method using the same, and more particularly, to remove the rod by separating the bit for drilling the ground in the direct boring grouting method in which the steel pipe is inserted at the same time as the ground drilling. The present invention relates to a bit-separable direct drilling steel pipe grouting device capable of using existing drilling equipment and a direct drilling steel pipe grouting method using the same.

The steel pipe grouting method is an underground excavation aiding method that improves the order while reinforcing the ground.The steel pipe is installed on the ground, and the packer is installed inside the steel pipe to inject grout material to inject the grout material into the ground. It is characterized by increasing the shear strength of the soil and rock. The steel pipe grouting method has been widely used as a part of the tunnel reinforcing method in recognition of its effect.

1 is a view showing a construction flow chart according to a conventional steel pipe grouting method, generally steel pipe grouting method is a step (a) for drilling the ground; Inserting a steel pipe having a strainer installed in the drilling hole (b); Injecting a sealing material between the steel pipe and the drilling hole (c); (D) injecting cement while installing the packer. Since this method proceeds to insert the steel pipe after drilling, in the soft soil ground where the drilling hole is not naturally maintained, it is difficult to insert the steel pipe due to the collapse of the drilling hole or the mixing of foreign substances, thereby reducing its applicability.

In order to improve the above problems, a direct drilling device for enabling steel pipe insertion and ground drilling at the same time has been developed, and is an example of the direct drilling device of Patent Registration No. 166423 of FIG. 2 and Utility Model Registration No. 300881 of FIG. 3. The direct drilling device of the patent No. 166423 is a female thread processing on the inner circumferential surface of the distal end of the steel pipe (1) equipped with the strainer and is screwed with the drill bit (4), which is externally threaded on the outer circumferential surface, the steel pipe and the drilling bit is directly coupled It can be seen that. In addition, it can be seen that the direct drilling device of the Utility Model No. 300881 has a structure in which the steel pipe 1 and the drilling bit 4 are screwed together and the power transmission rod 3 is integrally coupled. This configuration required bits of the same size as the inner circumferential surface of the steel pipe, making it difficult to apply ordinary bits as they are, and increasing the material cost by not reusing the power transmission rods. Since the applied power is transferred directly to the steel pipe, the strainer mounted on the steel pipe is easily detached or causes a problem in the steel pipe.

The present invention has been made in order to solve the above problems, it is possible to apply a conventional drilling bit irrespective of the size of the steel pipe in the direct drilling device that can perform the ground drilling and steel pipe insertion at the same time, and reuse the rod It is an object of the present invention to provide a bit-separable direct perforated steel pipe grouting device that makes it possible.

Another object of the present invention is to provide a one-bit separate type perforated steel pipe grouting device to maintain a stable shape of the steel pipe by preventing direct power transmission to the steel pipe is not directly coupled to the steel pipe.

Still another object of the present invention is to provide a steel pipe shoe connected to the end of the steel pipe can be applied as it is a drill mill combined with a drilling bit and a rod used in the conventional steel pipe grouting method, so that the steel pipe can be inserted at the same time It is to provide a one-bit split type perforated steel pipe grouting device.

Still another object of the present invention is to provide a simple and economical direct drilling steel pipe grouting method by enabling direct drilling while using a drilling mill combined with a drilling bit and a rod used in the conventional steel pipe grouting method.

1 is a construction sequence diagram according to a conventional steel pipe grouting method.

2 and 3 are cross-sectional views showing a conventional direct hole grouting apparatus.

4 and 5 are a cross-sectional view and an exploded perspective view showing an embodiment of the bit-separated direct hole steel pipe grouting apparatus of the present invention.

6 is a cross-sectional view of a state in which the rod is removed after drilling the ground using the present invention.

<Code Description of Main Parts of Drawing>

1, 10: steel pipe 11: strainer

20: Steel Shoe 21: Obstructions

3, 30: rod 31: section enlargement

4, 40: Drill bit 100: Ground

In order to achieve the above technical problem, the bit-separated direct hole steel pipe grout device of the present invention includes a plurality of inlets formed therein for injecting grout material, wherein the inlets are provided with a strainer; A steel pipe shoe connected to the end portion of the steel pipe and having an inner diameter smaller than that of the steel pipe tip portion; A rod coupling portion having a smaller size than the inner diameter of the steel pipe shoe and a cross-sectional enlargement portion extending from the bit coupling portion and having a size larger than the inner diameter of the steel pipe shoe, the rod being disposed inside the steel pipe and transmitting power applied from the outside; ; And a body extending from the head in a size smaller than the inner diameter of the steel pipe shoe and a size smaller than the inner diameter of the steel pipe shoe, the body being connected to the bit coupling part of the rod and into the steel pipe shoe. Inserted and the head portion is exposed to the outside and drilled to puncture the ground with the power received; is configured to include. That is, the bit-separated direct hole steel pipe grouting apparatus of the present invention by having a steel pipe shoe connected to the steel pipe tip, The conventional steel pipe grouting method of drilling the ground using a drilling bit connected to the rod is characterized in that the steel pipe can be inserted at the same time.

Hereinafter, the present invention will be described in detail with reference to the accompanying drawings.

4 and 5 is a cross-sectional view and an exploded perspective view showing an embodiment of the bit-separated direct-hole steel pipe grouting apparatus of the present invention, the bit-separated direct-hole steel pipe grouting apparatus of the present invention is a steel pipe, steel pipe shoe, rod and perforated bits It is configured to include.

Steel pipe 10 is a structural steel pipe generally applied in the steel pipe grouting method for reinforcement and order is formed on the outer circumferential surface of the injection hole for the injection of grout material is formed, the injection hole is fitted with a strainer 11 as shown in FIG. To prevent backflow. In addition, it can be processed so that the threaded portion is formed at both ends in case the connection of the steel pipe is required to insert to a predetermined depth. That is, one end of the male thread is processed on the outer peripheral surface and the other end of the female thread is processed on the inner peripheral surface so that the steel pipe can be extended by screwing.

Steel Shoe (Steel Shoe, 20) is to be connected to the end of the steel pipe 10, the inner diameter is formed smaller than the inner diameter of the steel pipe 10, the end portion of the steel pipe 10 and at the same time serves as a protrusion to separate the rod and the punching bit to be described later As a result it is an important component to complete the present invention. That is, since the inner diameter of the steel pipe shoe 20 is smaller than the inner diameter of the distal end portion of the steel pipe 10, the cross-sectional enlarged portion 31 of the rod, which will be described later, is caught. The rod 30 is drilled while drilling the ground 100. As it proceeds, the cross-sectional enlarged portion 31 of the rod pushes the steel pipe shoe 20 so that the steel pipe 10 also proceeds as the rod 30 progresses, thereby enabling the steel pipe to be inserted into the hole. At this time, it is preferable to further form a locking projection 21 inward at the end of the steel pipe shoe 20 is connected to the tip of the steel pipe 10. This widens the area where the cross-section enlarged portion 31 of the rod is engaged with the steel pipe shoe 20 so that the propagating force of the rod 30 is transmitted to the steel pipe shoe 20 so that the steel pipe 10 is inserted into the hole. This is to facilitate the operation.

Steel Shoe (Steel Shoe) 20 may be configured to surround the end of the steel pipe 10, or may be integrally combined or included in one configuration of the end of the steel pipe (10). In the embodiment of Figure 4, the steel tube shoe 20 is to be manufactured to wrap the steel pipe tip, such a steel pipe shoe 20 is more effective to protect the steel pipe (10). The steel pipe shoe 20 is a steel pipe by making the steel pipe 10 and the drilling bit 40 to be described later do not directly contact the power pipe (applied from the drifter of the perforator) is not directly transmitted to the steel pipe 10. 10 allows to maintain a stable shape. That is, in the conventional direct drilling device, since the steel pipe 1 and the drilling bit 4 are directly screwed together, the power transmitted to the drilling bit 4 directly affects the steel pipe 1, and thus is formed on the outer circumferential surface of the steel pipe 1. The strainer mounted on the injection port is separated or caused the deformation of the steel pipe, but by connecting the steel pipe shoe 20 to the tip of the steel pipe 10 to block the direct coupling of the steel pipe 10 and the punch bit 40 to the steel pipe 10 By protecting the steel pipe shoe 20 to act as a buffer to prevent direct power transmission to the steel pipe 10 it is possible to improve the conventional problem. The steel pipe shoe 20 is preferably higher in strength than the steel pipe 10 because it serves as a buffer to protect the steel pipe 10 while being in direct contact with the punch bit 40 at the tip of the steel pipe (10) .

The rod 30 extends from the bit coupling portion 32 and the bit coupling portion 32 having a smaller size than the inner diameter of the steel pipe shoe 20, and has a cross-sectional enlargement portion 31 having a size larger than the inner diameter of the steel pipe shoe 20. ), And is disposed inside the steel pipe 10 to transmit the power applied from the outside to the punch bit 40. The cross section enlarged portion 31 extending from the bit coupling portion 32 of the rod is larger than the inner diameter of the steel pipe shoe 20 so that the force propagated by the rod 30 is increased by the cross section enlarged portion 31. Is transmitted to the steel pipe 10 so that the steel pipe 10 can proceed without direct contact with the drilling bit 40 so that the steel pipe can be inserted at the same time as the ground drilling. The rod 30 may be a rod applied in a conventional steel pipe grouting method to the straight hole steel pipe grouting apparatus of the present invention.

The punch bit 40 has a head portion 42 having a size larger than the inner diameter of the steel pipe shoe 20 and a body 41 extending from the head portion 42 with a size smaller than the inner diameter of the steel pipe shoe 20. Including, the body 41 is coupled to the bit coupling portion 31 of the rod is inserted into the steel pipe shoe 20 and the head 42 is exposed to the outside to perforate the ground with the power received. The drilling bit 40 may be applied to the ground drilling regardless of the size of the steel pipe (10). However, if the head portion 42 of the drill bit is formed to have a size larger than the outer diameter of the steel pipe 10 and the steel pipe shoe 20, the drilling hole of a size larger than the steel pipe 10 and steel pipe shoe 20 is completed. As a result, the insertion of the steel pipe is facilitated, and the breakage of the strainer 11 due to the friction of the drilling hole may be reduced when the steel pipe is inserted. The body 41 of the drilling bit and the bit coupling portion 32 of the rod are detachably coupled, and when the ground drilling and steel pipe insertion are completed, the drilling bit 40 is separated from the rod 30 and is left on the ground.

Figure 6 is a cross-sectional view of the completion of the steel pipe insertion and ground removal at the same time using the bit-separated direct hole steel pipe grouting device of the present invention, the rod removed, the method using the bit-separated direct-hole steel pipe grouting device of the present invention Inserting the steel pipe while drilling the ground using a punched steel pipe grouting device; Removing the rod by separating the drill bit and the rod in the bit-separable direct-hole steel pipe grouting device; Installing a caulking material in the gap between the steel pipe and the perforated surface; And installing a packer in the steel pipe at predetermined intervals, and injecting and solidifying the grout material in the steel pipe. In this case, cement and urethane may be used as the grout material.

The ground is drilled by applying power to the rod 30 of the bit-separated direct hole steel pipe grouting apparatus of the present invention. At this time, the powered rod 30 is transmitted to the drilling bit 40 so that the drilling bit 40 can drill the ground, and as the ground drilling proceeds, the cross-sectional enlargement portion 31 of the rod is steel pipe shoe 20 ), The steel pipe 10 is inserted into the hole. While connecting the rod 30 and the steel pipe 10, the ground is drilled to a predetermined depth and the steel pipe 10 is inserted at the same time.

When the steel pipe insertion is completed at the same time as the ground drilling, the rod 30 is removed from the drilling bit 40 to remove the rod 30, and a caulking material is installed in the gap between the perforated surface of the ground and the steel pipe to seal the packer. Install at intervals and then inject grout material. The caulking material is preferably completed as soon as the insertion of the steel pipe is completed to prevent leakage and leakage of soil and required strength required to withstand the grout material injection pressure. The packer is installed to prevent backflow of the grout material.

As the grout material, cement and urethane series may be used simultaneously. The urethane series saves construction time due to the fast gel-time, and because of its high strength, it is more effective in strengthening the ground than when used alone as cement, and it has the characteristics of excellent early effect and limited injection and excellent ordering effect. However, in case of using urethane series alone as grouting material in steel pipe grouting method in which grout material injection length is formed long, gel-time is fast, so it passes through the strainer of steel pipe and steel pipe injection hole and between steel pipe and drilling hole. Since it hardened | cured before reaching the gap, it was difficult to add a tight grout material. Therefore, in the present invention, it is to be injected at the same time with the cement system to supplement the cement with a late gel time to improve the construction properties and to increase the ground strength of high strength.

Since the bit-separated direct-hole steel pipe grouting device of the present invention has a steel pipe shoe connected to the end portion of the steel pipe, it can be ground reinforced by the direct-hole steel pipe grouting method without combining the perforated bit and the steel pipe, and thus regardless of the steel pipe size, The punch bit can be used in the direct punch device, and the rod can be reused, and its applicability is excellent. In addition, by interfering with the power transmission to the steel pipe to maintain a stable shape of the steel pipe to expect excellent reinforcement effect. In addition, by providing a steel pipe shoe connected to the tip of the steel pipe while applying the drilling mill and the combination of the drilling bit and the rod used in the conventional steel pipe grouting method, while the ground drilling and steel pipe insertion can be performed at the same time, while the construction is easy This can reduce the amount of work.

Claims (6)

A plurality of injection holes are formed to spray the grout material, the injection hole is a steel pipe equipped with a strainer; A steel pipe shoe connected to the end portion of the steel pipe and having an inner diameter smaller than that of the steel pipe tip portion; A rod coupling portion having a smaller size than the inner diameter of the steel pipe shoe and a cross-sectional enlargement portion extending from the bit coupling portion and having a size larger than the inner diameter of the steel pipe shoe, the rod being disposed inside the steel pipe and transmitting power applied from the outside; ; And, And a body extending from the head with a size larger than the inner diameter of the steel pipe shoe and a size smaller than the inner diameter of the steel pipe shoe, the body being connected to the bit coupling portion of the rod and inserted into the steel pipe shoe. The head portion is a drill bit for drilling the ground with the power received from the outside exposed; Separated bit perforated steel pipe grouting device comprising a. In claim 1, The steel pipe shoe is a bit-separated direct hole steel pipe grouting device, characterized in that the locking projection is further formed inward at the end connected to the steel pipe tip. The method of claim 1 or 2, The steel pipe shoe is a bit-separated direct hole steel pipe grouting device, characterized in that integrally coupled to the end of the steel pipe The method of claim 1 or 2, Bit separating type perforated steel pipe grouting device, characterized in that the head portion of the drill bit is formed in a size larger than the outer diameter of the steel pipe and steel pipe shoe. Inserting a steel pipe while drilling the ground using the bit-separated direct-hole steel pipe grouting device of claim 1; Removing the rod by separating the drill bit and the rod in the bit-separable direct-hole steel pipe grouting device; Installing a caulking material in the gap between the steel pipe and the perforated surface; And, Injecting and solidifying the grout material into the steel pipe while installing the packer in the steel pipe at predetermined intervals; Straight hole steel pipe grouting method comprising a. The straight pipe steel grouting method of claim 5, wherein the grout material is cement-based or urethane-based.