KR20060032163A - Guidance pipe and propelling pipe assembly for pressing method - Google Patents

Abstract

The present invention relates to a lead pipe and a propulsion pipe assembly for a press-fit method, one end of the outer cylindrical steel pipe 11 is to be fitted with the end of the adjacent first propelling pipe 20, the inner cylindrical steel pipe 12 is Hydraulic propulsion which is inscribed to the other end of the outer cylindrical steel pipe (11), the thrust by making one side of the outer cylindrical steel pipe (11) as a reaction force in the inside of the outer cylindrical steel pipe (11) to propel one surface of the inner cylindrical steel pipe (12). While a certain number of jacks 13 are provided, the front pipe 10 is inclined at the tip to naturally form the slope 30 at the end of the curtain. It is possible to reduce the construction cost because no manpower is required, and it is easy to modify the direction of the leading pipe, so it is not affected by the tunnel line. It is possible to excavate while naturally forming slopes on the surface to prevent the disrupted end of the membrane from falling down due to earth pressure and to use the concrete as the material of the propulsion pipe as the propulsion pipe. · It can be used as a sewer pipe.

Description

Lead and propulsion assembly for press-fitting method {GUIDANCE PIPE AND PROPELLING PIPE ASSEMBLY FOR PRESSING METHOD}

1 is a perspective view of the combination of the propulsion pipe and the lead pipe according to the present invention.

FIG. 2 is a cutaway sectional view of FIG. 1; FIG.

3 is a longitudinal cross-sectional view of FIG. 1;

4 is a side cross-sectional view taken along line A-A 'and line B-B' of FIG.

Figure 5 is a tunnel excavation state using the present invention.

Explanation of symbols on the main parts of the drawings

10: Lead pipe 11: outer cylindrical steel pipe

12: inner cylindrical steel pipe 13,14: hydraulic propulsion jack

20, 21: propulsion pipe 22, 23: cylindrical steel plate

24: lubricant injection hole 30: the end of the film

40: rib 50: injection hose

60: pushpin

The present invention relates to a lead pipe and a propulsion pipe assembly for the press-fit method, more specifically, in addition to the hydraulic propulsion jack when drilling of the propulsion pipe assembly, additional rear facilities and a large number of manpower input is not required, thus reducing the construction cost, leading It is easy to modify the direction of pipe excavation, so it is not strongly dependent on the tunnel line, and it is possible to excavate while naturally forming a slope at the end of the leading edge due to the inclination of the leading end, so that the disturbed end of the membrane can be prevented from collapse by earth pressure. For a lead pipe and a propulsion pipe assembly.

In general, shielding and semi-shielding methods have been used in recent years to form underground tunnels such as railways, road tunnels, water and sewage tunnels, electric power and communication tunnels, and common areas.

The shield method was developed in response to construction pollution such as ground subsidence or noise and vibration when it was constructed by the open-ended method without disturbing road traffic. It is a strong steel called shield with a section slightly larger than the tunnel profile. It is a method to drill through the tunnel while repeating this work to push the barrel or frame into the ground and proceed to excavate and prevent the collapse of the tip ground and to support the excavation section at the rear of the shield. Steel or reinforced concrete is used as the segment material, and the shield is composed of a steel shell to protect the interior and a propulsion mechanism for propelling the shield, a collapse prevention mechanism, a segment assembly mechanism, a hydraulic mechanism, and an accessory mechanism.

On the other hand, the semi-shield method is a method of digging a tunnel while carrying out a series of repetitive operations for pushing the excavator into the ground with a jack in the rear by mounting the excavator in the working tool and pushing the propulsion pipe together with the excavator.

However, such a conventional shielding method is difficult to manufacture the shield, and assembling the segment requires a rear facility such as a segment assembly mechanism and a lot of manpower, so that the construction cost is high and the excavation speed decreases until the rear facility can be installed.

In addition, the semi-shield method is difficult to modify the excavation direction of the excavator and the propulsion pipe is difficult to use when excavation of a curved section with a small radius of curvature is inevitable due to spatial constraints in the city underground and difficulty in passing through private land. When tunnel excavation is difficult due to the lack of independence of the barrier and it is difficult to use the shield excavator, there is a possibility that safety accidents may occur due to the collapse of the edge of the curtain.

The present invention has been made to solve the above problems, an object of the present invention is to save the construction cost because it does not require additional rear equipment and a large number of personnel input in addition to the hydraulic propulsion jack when the propulsion of the propulsion pipe assembly. It is easy to modify the direction of excavation of the pipe, so it is not subject to the tunnel linearity, and it is possible to excavate while naturally forming a slope at the end of the leading edge due to the inclination of the leading end of the pipe to prevent the disturbed end of the collapse from being collapsed by earth pressure. It is to provide a lead pipe and a propulsion pipe assembly for the press-fitting method that can use the concrete pipe itself as a propulsion pipe as a material of the propulsion pipe as it is, sewage pipe such as water and sewage tunnel.

In order to achieve the above object, the present invention is one end of the outer cylindrical steel pipe is fitted with the end of the adjacent first propulsion pipe, the inner cylindrical steel pipe is inscribed on the other end of the outer cylindrical steel pipe, the outer cylindrical steel pipe Inside of the hydraulic cylinder jack is provided a certain number of thrust by pushing the one side of the outer cylindrical steel pipe as a reaction force is installed, the tip is inclined to form a slope naturally at the end of the curtain To provide a lead pipe for the press-fit method.

In addition, the present invention is a cylindrical steel plate of the propulsion pipe adjacent to the other end of the first propulsion pipe, one end of which is fitted to the outer cylindrical steel pipe of the lead pipe and the both ends of the plurality of propulsion pipes installed to be connected to the rear end thereof. For the press-fitting method, the propellant assembly is welded and the propellant tube bodies are filled with mortar, and the propellant tube assembly coupled to the lead pipe further includes a lubricant inlet formed to facilitate the injection of the liquid lubricant and the backfill material. Provide lead and propulsion tube assemblies.

When described in detail with reference to the accompanying drawings a preferred embodiment of the present invention configured as described above are as follows.

1 is a perspective view of the propulsion pipe and the leading pipe according to the present invention, Figure 2 is a cutaway cross-sectional view of Figure 1, Figure 3 is a longitudinal cross-sectional view of Figure 1, Figure 4 is a line A-A 'and B- of FIG. B 'side cross-sectional view.

As shown in Figures 1 to 4, when looking at the structure of the propulsion pipe and lead pipe for the press-fit method of the present invention, the outer end of the both ends of the propulsion pipe 21 is propelled by the thrust of the rearmost hydraulic propulsion jack 14 At the periphery, cylindrical steel plates 22 and 23 are fitted for welding to adjacent propelling pipes 21, which doubles the airtightness of the coupling portion between the propulsion pipes 21 and the cylindrical steel plates 22 and 23, In consideration of this, it is preferable to make the pipe thickness of a predetermined length at both ends of the propulsion pipe 21 to be made as small as the thickness of the cylindrical steel sheets 22 and 23 so that a step is provided on the outer circumferential surface of the propulsion pipe 21.

Thus, the outer peripheral surface of the end of the propulsion pipe 21 is exposed even after the cylindrical steel plate 22 is fitted to one end of the propulsion pipe 21, and the other end of the propulsion pipe 21 is fitted to the cylindrical steel plate ( 23 so that the cylindrical steel plates 22, 23 and the propulsion pipe 21 are not deformed by load or self weight when the cylindrical steel plates 22, 23 of the adjacent propulsion pipe 21 are mutually coupled. Welded together and the propulsion pipe 21 body is filled with mortar to combine to improve the airtightness and durability of the combined propulsion pipe 21, the propulsion pipe 21 is low production cost and propulsion in the tunnel It is preferable that the material is made of plain or reinforced concrete, which is easily manufactured. In the conventional shield method, concrete is used as a material of a segment, but in the semi-shield method of propelling a plurality of propulsion tubes by a hydraulic jack. Since the concrete pipe is not used, the present invention reduces the frictional force and adhesion around the pipe by injecting liquid lubricant while utilizing the concrete pipe itself as a water and sewage pipe such as a water and sewage tunnel. It is characteristic in this regard.

On the other hand, the leading pipe 10 located at the foremost part of the tunnel excavation is composed of a double cylindrical steel pipe, one end of the outer cylindrical steel pipe 11 is to be fitted with the end of the adjacent first propulsion pipe 20, the inside Cylindrical steel pipe 12 is in contact with the other end of the outer cylindrical steel pipe (11) while the inside of the outer cylindrical steel pipe (11) a separate hydraulic propulsion jack 13 to obtain a thrust on one surface of the outer cylindrical steel pipe (11) as a reaction force A plurality of these are installed to propel one surface of the inner cylindrical steel pipe 12 so that the inner cylindrical steel pipe 12 protrudes while exiting the outer cylindrical steel pipe 11.

At this time, the one end of the first propulsion pipe 20 to be coupled with the lead pipe 10, of course, the cylindrical steel plates 22, 23 should not be fitted, the first propulsion pipe 20 of the liquid lubricant and the backfill material In order to facilitate the injection, the lubricant inlet 24 should be formed, wherein the liquid lubricant in which bentonite, clay, and water are properly blended according to the soil conditions is injected into the lubricant inlet 24 through the injection hose 50 to be inscribed in the tunnel. To minimize the frictional force of the propulsion pipe assembly propelled by the hydraulic propulsion jack 14 at the rear, and the backfill material in which cement, sand, and water are properly blended is formed in the air gap between the propulsion pipes 20 and 21 and the excavating surfaces of the tunnel. This will reduce the occurrence of ground subsidence. In addition, according to the soil or rock conditions in the tunnel may be used to form a fuel injection port 24 to spray the liquid lubricant to the other propulsion pipe 21 coupled to the first propulsion pipe (20).

In particular, the present invention is a mechanical shield, which is an excavator equipped with a cutter head as in the shielding method, is mainly used by an excavator such as shovels, peaks, and breca, such as excavators such as hydraulic shovels or boom katas, Since a semi-mechanical excavation is easily performed by combining a loading machine such as a belt conveyor, an excavation, and a loading container, the inner cylindrical steel pipe 12 of the lead pipe 10 has a vertical end when viewed from the side. It is formed to be inclined. That is, the length of the steel pipe at the upper side of the inner cylindrical steel pipe 12 inscribed at the uppermost part of the circular excavation surface when press-fitting into the underground tunnel is the longest and on the contrary, at the lower side of the inner cylindrical steel pipe 12 inscribed at the bottom of the circular excavation surface. The length of the steel pipe is the shortest, in order to prevent the disturbed membrane end from collapsing by earth pressure by naturally forming the slope 30 at the membrane end when excavating by attraction or semi-mechanical.

In addition, if the elongation length of each of the several hydraulic propulsion jacks 13 installed between the outer cylindrical steel pipe 11 and the inner cylindrical steel pipe 12 of the lead pipe 10 is adjusted differently, it is easy to modify the direction in the ground and thus the curvature. Excavation can also be performed on curved sections with small radius.

As long as the inner and outer cylindrical steel pipes 11 and 12 of the lead pipe 10 have a cylindrical shape, the inner and outer cylindrical steel pipes 11 and 12 are not limited to those shown in the drawings. While having a hollow inside, the rib 40 may serve to maintain the gap and support the earth pressure in the tunnel.

In addition, when the peripheral frictional force and the total load are increased by repeated coupling of the propulsion pipes 20 and 21 to exceed the capacity of the rear hydraulic propulsion jack 14, a separate hydraulic propulsion jack (not shown) is added in the middle. You can also install

When explaining the operation of the lead pipe and the propulsion pipe assembly for the indentation method of the present invention through the construction process of the indentation method as follows.

Figure 5 is a tunnel excavation state diagram using the present invention, as shown here, first, the inner and outer cylindrical steel pipes (11, 12) and the leading pipe (10) provided with a certain number of hydraulic propulsion jack 13 therebetween and the The first propulsion pipe 20 coupled with the lead pipe 10 is mounted on the oscillation work tool that is the entrance of the tunnel, and at the same time as the excavation and rear hydraulic propulsion jack 14 to stabilize the tunnel, the lead pipe 10 and The assembly of the first propulsion pipe 20 is pushed into the ground and then pushed.

Here, the reaction force of the rear hydraulic propulsion jack 14 of the oscillation tool should be a structure capable of sufficiently resisting the thrust of the leading pipe 10 and the propulsion pipes 20 and 21, and the opening operation of the oscillating tool may cause ground collapse and Since there are many risks of road depression, partial disruption should minimize disturbance of the ground.

Next, the excavation proceeds to a certain degree by manpower or semi-mechanical, and at the same time, the hydraulic propulsion jack 13 between the inner and outer cylindrical steel pipes 11 and 12 is extended to propel the inner cylindrical steel pipe 12 of the lead pipe 10. While extending the rear hydraulic propulsion jack 14 mounted on the oscillation work tool which is the entrance of the tunnel, the assembly of the lead pipe 10 and the propulsion pipe 20 is pushed forward, and the rear hydraulic propulsion jack 14 is In each case, the hydraulic propulsion jack cylinders should be arranged symmetrically at the same distance from the center line of the rearmost propulsion tube to prevent eccentric thrust from being applied.In this case, the rearmost propulsion tube is located between the hydraulic jack cylinder and the rearmost propulsion tube. It is preferable to insert a push rod 60 having a square pillar shape so that the pressure of the pushing jack 14 is not concentrated in one portion, and the rearmost propulsion pipe is prevented from being damaged in the contact portion with the push rod 60. top It is preferable to reinforce the end of the rearmost propulsion pipe with a steel reinforcing ring (not shown), and as described above, the extension length of each of the hydraulic propulsion jacks 13 between the inner and outer cylindrical steel pipes 11 and 12 may be increased. Different adjustments can be made to modify the excavation direction, facilitating excavation regardless of the tunnel alignment.

Next, the other propulsion pipe 21 is fitted and welded to the other end of the first propulsion pipe 20 which is not coupled with the lead pipe 10, and the extension of the excavation and hydraulic propulsion jacks 13, 14 and By repeating the combination of the propulsion pipe 21 it is possible to complete the construction of the planned tunnel linear.

At this time, it is necessary to accurately carry out the procurement management survey to plan the propulsion of the propulsion pipes 20 and 21 in the construction management level, and to minimize the frictional force of the assembled assembly body and improve the work efficiency. Backfill to fill the void between the liquid skid and propulsion tubes 20 and 21 and the excavation surface of the tunnel will have to be injected with the excavation of the propulsion tube assembly through the lubricant inlet 24.

In the above, specific preferred embodiments of the present invention have been shown and described, but the present invention is not limited to the above-described embodiments, and those skilled in the art to which the present invention pertains have the technical gist of the present invention. Various changes can be made without departing from.

As described above, the present inventors for the lead pipe and the propulsion pipe assembly for the press-fit method can be reduced in addition to the hydraulic propulsion jack during the drilling of the propulsion pipe assembly, additional rear equipment and a large number of personnel do not need to reduce the construction cost, It is easy to modify the direction of excavation, so it is not highly dependent on the tunnel line, and it is possible to excavate while naturally forming a slope at the end of the leading edge due to the inclination of the leading pipe, which prevents the disturbed end of the collapse from being collapsed by earth pressure. Using concrete as the material of the pipe, the concrete pipe itself, which is the propulsion pipe, can be used as water and sewage pipes such as water and sewage tunnels.

Claims (2)

One end of the outer cylindrical steel pipe 11 is adapted to fit with the end of the adjacent first propulsion pipe 20, the inner cylindrical steel pipe 12 is inscribed to the other end of the outer cylindrical steel pipe 11, the outer cylindrical steel pipe Inside the (11), while a certain number of hydraulic propulsion jack 13 for propelling one side of the inner cylindrical steel pipe 12 to obtain a thrust by using one surface of the outer cylindrical steel pipe 11 as a reaction force, the slope ( Lead pipe for indentation method, characterized in that the tip is inclined in order to form naturally. The method of claim 1, Cylindrical steel plates 22, one end of which is fitted to the other end of the first propulsion pipe 20, which is fitted to the outer cylindrical steel pipe 11 of the lead pipe 10, and both ends of the plurality of propulsion pipes 21 connected to the rear end thereof. 23 is inserted into and welded to the cylindrical steel sheets 22 and 23 of the adjacent propulsion pipes 20 and 21, and the propulsion pipe assembly is filled with the mortar mortar with the propulsion pipe assembly and the first propulsion to engage with the lead pipe 10. Pipe 20 is the lead pipe and propulsion pipe assembly for the indentation method, characterized in that further comprises a lubricant inlet 24 formed to facilitate the injection of the liquid lubricant and the backfill.

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