KR20040066371A - Joint structure of the steel pipe for construction - Google Patents

Abstract

PURPOSE: A connection structure of steel pipes for construction is provided to obtain excellent water stopping effects by injecting filler such as cement milk tightly to a joint between connection members and to prevent the relaxation of the ground by leaking out a portion of the filler filled in a joint between connection members to the ground. CONSTITUTION: In the connection structure of steel pipes for construction, one of female and male connection members(9,8) is made of hot extruded steel, and connection holes(10a,b) are perforated on the female connection member(9) or the male connection member(8) and a main steel pipe(4) in the area and connected to a joint between the female, male connection members(9,8) and the inner space of the main steel pipe(4) to place filler to a joint between female, male connection members.

Description

Joint structure of the steel pipe for construction

The present invention relates to a connection structure of steel pipe members for construction used in pipe loops and the like in tunnel construction work by non-adhesive methods, such as the propulsion method or the traction method of a concrete enclosure, and in particular, there is no fear of deformation, It is about the connection structure of steel pipe for construction which can improve the reliability of exponential effect by filling and the injection of injection to prevent ground loosening.

The pipe loop method is a method of constructing a pipe loop for protection by steel pipes by inserting a plurality of pipes (steel pipes) continuously or at regular intervals along the periphery of the excavation section in order to safely and quickly construct a tunnel or underground structure. . According to this method, the shear strength is improved by the protective pipe loop constructed of steel pipes, and also serves as the earth plate.

For example, as shown in FIG. 10, when the underground structure 2, such as a tunnel, is constructed in a non-adhesive manner below the track 1 of a railway track or the like, the construction steel pipe member 3 is placed on the track of a railway track or the like (see FIG. 10). 1) It is inserted underneath to form a pipe loop as a roof-like structure. The pipe loop supports the load of the track 1 on the upper railway track and the like, and the underground structure 2 is constructed below the pipe loop.

By the way, in order to prevent the outflow of soil from the space | interval of the adjacent steel pipe member 3 for construction, for example, as shown in FIG. 11, the connection member 5 of the one steel pipe main body 4 and the other steel pipe main body 4 are connected. The members 6 are fitted to connect the two steel pipe bodies 4 and 4. And these connection members 6 and 5 also play a function as guides at the press-in of the construction steel pipe member 3 at the same time.

However, in the case where a tunnel or underground structure has already been built, for example, just below the track 1 of a railroad track or the like, soil is infiltrated into the gap between the steel pipe members 3 for construction or groundwater flows if the connection member is not used. In addition, there is a possibility that the ground eventually collapses, such as the inflow of surrounding soil, and when the connecting material is used, water leakage occurs at the joints of the connecting members 5 and 6.

In addition, in the case of the construction steel pipe member 3 having a pair of connecting members (the connecting member 5 is an outward flange, the connecting member 6 is an inward flange) in which the connecting members 5 and 6 are hooked. When the steel pipe is press-fitted, the press-fitting direction is shifted, and when the gap with the pre-press-fitted steel pipe is widened as shown in FIG. 12, the connecting member 5 is pressed inwardly by the pressing force of the steel pipe, and the connecting member 6 is moved outward. The force in the direction of the gap is acting. As a result, there is a possibility that the connecting members 5 and 6 are separated from the steel pipe main body 4.

On the other hand, Japanese Patent Laid-Open No. 10-37656 attaches an injection guide tube 7 to the connecting member 5 as shown in Fig. 13, and inserts an injection tube not shown in the injection guide tube 7, A technique for injecting an injection material as a filler into a tube has been proposed.

According to this prior art, the injection material injected into the injection tube is filled in the space surrounded by the connection member 5 and the connection member 6 via the injection guide tube 7. As a result, the connection between the connecting members is filled with the injection material, so that there is no fear of leakage of the joint.

In addition, since the injection guide tube 7 acts as a reinforcing member of the connecting member 5, even when the pressing direction is shifted so that the construction steel pipe members 3 are separated from each other when the construction steel pipe member 3 is press-fitted, the connecting member 5 No deformation Therefore, the deformation of the connection member 6 also becomes difficult, so that the damage of the connection members 6 and 5 can be prevented.

However, in the above prior art, the filling material is filled into the space surrounded by the connecting member 5 and the connecting member 6 by the injection tube through the guide tube 7, except for the longitudinal connection portion of the construction steel pipe member 3. Efforts such as forming a cutout in a part of the connecting member at the portion, cutting the guide tube 7 at a position corresponding to the cutout to form a short gap, and draining the injection material. In addition, there is a concern that the injection portion between the connecting member 5 and the connecting member 6 cannot be sufficiently filled with the injection material.

In addition, since the guide tube 7 cannot prevent the flange portion acting as a reinforcing member of the connecting member 5 from being deformed, for example, when the outward flange of the connecting member 5 cannot maintain a right angle, it may cause trouble as the connecting member. do.

The object of the present invention is that there is no fear of deforming the connection member by eliminating the above-mentioned conventional unreasonable points, and it is possible to directly inject fillers such as cement milk into the joints between the connection members, resulting in uncharged due to incomplete circulation of the filler. It is possible to contribute to the improvement of reliability of the exponential effect because there is no part, and to provide a connection structure of construction steel pipes, which can also be imported and injected to prevent the loosening of the ground by leaking the filler back into the ground when filling the joints between the connecting members.

The present invention, in order to achieve the above object, first, by inserting the connecting member of the other steel pipe body to the connecting member of one steel pipe main body in which the connecting member is provided in the longitudinal direction of the steel pipe in the opposite position of the outer peripheral surface of the steel pipe main body In the steel pipe member for construction in which the main body is connected, at least one of the connecting members is made of hot-extruded steel, and in the region of the female connecting member, the joint between the two connecting members and the inside of the female connecting member-side steel pipe main body It is a summary that a filler is injected so that a filler hole can be injected into the joint portion between a female and a male connecting member from the steel pipe body of the female connecting member side by drilling a communication hole communicating with the space.

Secondly, the connecting member has a leg space, and the communication hole forms a bilateral hole in communication with the leg space and the inner space of the steel pipe main body and in communication with the joint between the leg space and the female and male connection members. .

Thirdly, the connecting member is provided with a communication hole in which the leg space and the outside communicate with each other.

Fourthly, the male connecting member corresponding to the female connecting member is made up of a hollow tube that can be expanded by hydraulic pressure.

According to the invention as set forth in claim 1, at least one of the female connecting member and the male connecting member is a hot-extruded steel, so that any integrally formed connecting part can be obtained simply, for example, It is also possible to freely set a shape that is difficult to deform, such as a combination of a female connecting member having a shape like a narrow bag groove and a male connecting member having a rail shape in which the upper portion is expanded.

In addition, the filler can be injected into the joint between the connecting members directly through the communication hole in the steel pipe body of the construction steel pipe member inserted into the ground, and the filler leaks into the ground from the gap between the joints between the connecting members and prevents the loosening of the ground. You can also perform import injections.

According to the present invention as set forth in claim 2, in addition to the above-described action, the connecting member has a leg space, and by setting the width of the leg portion to an appropriate value, one steel pipe main body and another steel pipe main body adjacent to the steel pipe main body It becomes possible to adjust the spacing of. In addition, since the communication hole communicates between the leg space and the inner space of the steel pipe main body, and the bilateral hole communicating with the joint between the leg space and the connecting member, fillers filled in the leg space can be injected into the joint between the connecting members. .

According to this invention of Claim 3, in addition to the effect | action of this invention of Claim 2, since a filler leaks to the ground, it can add not only to inject into a ground from the gap of the joint part between connection members, but also to inject through this leg space. .

According to the present invention as set forth in claim 4, the male connecting member is expanded by, for example, a hydraulic pressure when filling a filler, and the gap between the male connecting member is made small and the connecting member is interposed therebetween.

The exponential effect of the joint can be enhanced.

BRIEF DESCRIPTION OF THE DRAWINGS The longitudinal cross-sectional view of the connection member which showed 1st Embodiment regarding the connection structure of the steel pipe for construction of this invention.

Figure 2 is a longitudinal sectional view showing a situation in which the filler is injected into the joint between the steel pipe body for construction

Figure 3 is a longitudinal cross-sectional view showing a connection state of the steel pipe member for construction

4 is a longitudinal sectional view of principal parts of a connecting portion showing the second embodiment of the present invention;

5 is a longitudinal cross-sectional view of main parts of the connecting section showing the third embodiment of the present invention;

Figure 6 is a longitudinal cross-sectional view showing a connection state of the steel pipe member for construction of FIG.

Fig. 7 is a longitudinal sectional view of a connecting portion showing a fourth embodiment of the present invention.

8 is a longitudinal sectional view of a connecting portion showing a fifth embodiment of the present invention;

9 is a longitudinal sectional view of principal parts of the connecting section showing the sixth embodiment of the present invention;

10 is an explanatory diagram of a pipe loop

11 is a view of a conventional steel pipe connection structure related to a pipe loop.

12 is a modified view of a conventional steel pipe connection structure for a pipe loop.

13 is a view of another conventional pipe connection structure of a pipe loop according to the related art

<Explanation of symbols for the main parts of the drawings>

1: track (such as railroad tracks) 2: underground structures

3: steel pipe member for construction 4: steel pipe body

5, 6: connection member 7: guide tube

8: Male connection member 8a: Insertion portion

8b, 9a: side wall 9: female connecting member

10a, b, c, 15: communication hole 11: injection hose

12: Filling material 13: leg

13a: leg space 14: socket plug

EMBODIMENT OF THE INVENTION Hereinafter, embodiment of this invention based on drawing is described in detail.

1 is a longitudinal sectional view of an essential part showing a first embodiment of the connection structure of a steel pipe for construction of the present invention, FIG. 2 is a longitudinal sectional view showing the injection state of the filler in FIG. 1, FIG. Longitudinal sectional view showing the connection state of construction steel pipe with connection structure of. Reference numeral 4 is a steel pipe main body of the construction steel pipe member 3, the connecting member is provided in the longitudinal direction of the steel pipe main body 4 in the opposite position of the outer peripheral surface, the other steel pipe to the connection member of one side steel pipe main body (4) The point of connecting two steel pipe main bodies by interposing the connection member of the main body 4 is the same as before.

The steel pipe main body 4 of the steel pipe member 3 for construction is forcibly formed in a tubular shape having a substantially circular cross section in the drawing, but may be a square tube.

The connecting member of the present invention is formed of a male connecting member 8 and a female connecting member 9 on the left and right sides of one steel pipe main body 4, respectively, on both sides or at least the male connecting member 8 or one member. Is a hot extrusion steel. Hot-extruded section steel refers to a section steel produced by a method in which a slab (billet) heated at a high temperature is extruded from a ram into a die and extruded while forming a steel like a round steel through a hole opened in the die. Hot-extruded section steels can be made into shapes that cannot be rolled, can be produced in small quantities, and can be processed into high alloy steels that are difficult to machine.

In the present embodiment, the male connecting member 8 has a T-shaped inserting portion 8a with the tip expanded, and the left and right side walls 8b are formed on both sides of the inserting portion 8a. The space surrounded by the T-shaped inserting portion 8a and the left and right sidewalls 8a is where the front and rear end portions of the left and right sidewalls 9a of the female connecting member 9 described later are inserted.

The female connecting member 9 has left and right side walls 9a with the front ends facing each other, and has a substantially C-shape formed by a narrow groove of the inlet width.

And the communication hole (10a, b) for making the inner space of the steel pipe main body 4 and the joint between the male connecting member 8 and the female connecting member 9 to the steel pipe main body 4 and the female connecting member (9) Form.

The male connecting member 8 and the female connecting member 9 are arranged along the longitudinal direction of the steel pipe main body 4 (hereinafter referred to as the axial direction of the steel pipe) from the outside of the steel pipe main body 4 by welding or the like.

Next, a method of constructing a pipe loop hole using the above-described construction steel pipe member 3 will be described. First, an auger drill or the like not shown is disposed inside the steel pipe member 3 for construction, and the tip of the steel pipe member 3 for construction or the earth and sand inside thereof are excavated, and the excavation is made through the inside of the steel pipe body 4. Remove the sat, etc. In this state, the construction steel pipe member 3 can be inserted into the ground by pressing the rear end of the construction steel pipe member 3 in the axial direction of the steel pipe with a hydraulic jack device or the like not shown.

Next, the connection is made so that the T-shaped inserting portion 8a of the male connecting member 8 inserted into the construction steel pipe member 3 is fitted into the inner space of the female connecting member 9 on the other construction steel pipe member 3 side. The members are coupled to each other, the rear end of the other steel pipe member 3 is excavated with an auger drill or the like not shown while pressing in the axial direction of the steel pipe with a hydraulic jack device or the like, and slipped to connect the steel pipe members 3 and 3 for construction. As the male connecting member 8 and the pressure connecting member 9 are coupled to each other, it is possible to transfer the forces in a direction perpendicular to the axial direction of the steel pipe (hereinafter, referred to as a right angle to the axial direction of the steel pipe). .

Subsequently, the pipe loop hole is constructed by repeating the process of inserting and connecting another construction steel member 3 next to the construction steel member 3 which is already inserted in the same manner as described above.

In addition, in the case where the extension of the pipe loop, that is, the extension of the construction in the axial direction of the steel pipe, a plurality of constructions are performed by welding or the like, for example, by welding other construction steel pipe members 3 to the rear ends of the previously installed steel pipe members 3 inserted into the ground. The molten steel pipe member 3 is bonded and press-fitted into the ground in accordance with the above-described tips.

First, the open both ends of the female connecting member 9 for construction steel pipe member 3 inserted into the ground are closed by using metal, alloy material, synthetic resin material or the like such as steel or aluminum.

Next, the injection hose 11 is inserted into the communication holes 10a and b inside the steel pipe main body 4 on the construction steel pipe member 3 side inserted into the ground, and the male connecting member 8 and the female connecting member are inserted. Filler 12, such as cement milk or water glass, is injected into the interfitting portion of (9).

As described above, both ends of the female connecting member 9 are blocked by the blocking member. For this reason, the filler 12 does not leak to both ends of the female connecting member 9, and after the filler is filled with the joint portion between the male connecting member 8 and the female connecting member 9, the leaked material is injected into the external ground.

4 shows a second embodiment of the present invention, in which a leg portion 13 is formed in each of the male connecting member 8 and the female connecting member 9 and surrounded by the leg portion 13 ( 13a). And the communication hole 10a of the steel pipe main body 4 is connected with this leg space 13a, and the male connecting member 8 and the female connecting member 9 have this leg space 13a and a male connecting member ( 8) and a communication hole 10c for communicating the joint between the female connecting member 9 is formed. In the illustrated example, the communication hole 10c is provided in both the male connecting member 8 and the female connecting member 9, but either one can be used. In addition, the socket plug 14 is covered with the communication hole 10a of the steel pipe main body 4.

In the second embodiment described above, the filler 12 injected from the inside of the steel pipe main body 4 passes over the joint portion between the male connecting member 8 and the female connecting member 9 while filling the leg space 13a. do.

In this embodiment, by using the steel pipe member 3 for construction in which the length of the leg portion 13 on the male connecting member 8 or the female connecting member 9 is set to an appropriate value, one steel pipe main body 4 and The space | interval between the other steel pipe main bodies 4 adjacent to this can be adjusted to a suitable dimension.

FIG. 5 shows a third embodiment of the present invention, in which the leg 13 of the female connecting member 9 is made relatively long to enlarge the leg space 13a, and the ground and the outer side of the leg 13 are formed. It is through the communication hole 15 through.

When a plurality of such external communication holes 15 are installed, the filler 12 is filled with the joint portion between the male connecting member 8 and the female connecting member 9, and then leaks can be directly injected in addition to the injection into the external ground. It also reduces the effort to inject into the ground.

In addition, in the above-mentioned embodiment, the shape of the male connecting member 8 and the female connecting member 9 can be selected in various ways. For example, as shown in FIG. 7, the male connecting member 8 forms a leg 13 in a closed shape like a circular tube, or as shown in FIG. 8, the leg of the male connecting member 8 shown in FIG. 4. The left and right side walls 8b are omitted from the unit 13.

In FIG. 9 as a sixth embodiment of the present invention, the female connecting member 9 is a hot-extruded form steel as in the above-described embodiment, and the shape thereof is the same as that of the above embodiment, but the male connecting member 8 has a hydraulic pressure, for example, It is composed of a hollow hollow tube that can be expanded up to 300kg / ㎠. As the hollow tube, a deformed steel tube (STKM 12A class) is most suitable.

In this way, the filler 12 or water glass, etc., are filled in the male connecting member 8, which is a hollow tube, and expanded as shown by the dotted line by the hydraulic pressure, thereby reducing the distance from the female connecting member 9, thereby making it possible to index the joints between the connecting members. The effect can be enhanced. Such expansion may be performed after the above-described filling of the filler 12 is completed.

As described above, the connection structure of the steel pipe for construction of the present invention has no fear of deforming the connection member, and since the filler such as cement milk can be directly injected into the joints between the connection members, the injected filler is not properly circulated. There is no filling site, so a reliable exponential effect is obtained. At the same time, a part of the fillers filled by the joints between the connecting members leaks into the ground, and an immersion injection for preventing the ground from loosening is also possible.

Claims (5)

A construction steel pipe member in which a female connecting member of another steel pipe main body is connected to a male connecting member of one steel pipe main body provided with a connecting member along the longitudinal direction of the steel pipe main body at an opposite position of the outer circumferential surface to connect two steel pipe main bodies. At least one of the male connecting members 9 and 8 is made of hot-extruded steel, and the male and male connecting members 9 or male are connected to the male connecting member 8 and the steel pipe main body 4 in the region. It is characterized in that the filler is injected into the joint between the female and male connection members through the communication hole 10c through which the joint between the members 9 and 8 and the internal space of the steel pipe main body 4 communicate with each other. Connection structure of steel pipe for construction. The male connecting member (8) and the female connecting member (9) have a leg space (13a), and the inner space and the male and female spaces of the leg space (13a) and the steel pipe main body (4). A connection structure of steel pipe for construction in which two-way communication holes (10c) in communication with the space between the joints between the connecting members (9, 8) are drilled. The connection structure of a construction steel pipe according to claim 2, wherein the female connecting member (9) is perforated with a communication hole (15) in which the leg space (13a) communicates with the outside. 2. The connection structure of a construction steel pipe according to claim 1, wherein the male connecting member (8) is a hollow tube having an empty space inside which can be expanded by hydraulic pressure. The construction structure according to any one of claims 1 to 3, wherein the filling material pressed into the communication hole (15) leaks between the male and female connection member joints and is filled into the ground to prevent the ground from loosening.