KR101050756B1 - Semi-shielded excavation device and tunnel excavation method using composite heavy pipe - Google Patents

Abstract

The present invention by using a composite medium pressure pipe consisting of a composite medium pressure S-shaped pipe and a composite medium pressure T-shaped pipe, it is possible to be installed in the continuous sharp curve section and a long distance section of more than 1km without interference due to jamming phenomenon, by using a plurality of heavy pressure pipe It prevents air delays caused by the semi-shield method and eliminates the need for the construction of the rear tunnel and the vertical section of the large section required for the application of the compound pressure pipe in the semi-shield method, as well as the semi-shield excavation using the compound pressure pipe to obtain air shortening and economic effects. It is an object of the present invention to provide a device and a tunnel excavation method.

Semi-shielded excavation device using a compound pressure pipe according to the present invention for achieving the above object is an excavator; The propulsion pipe, which is connected to the rear end of the excavator, is installed between the propulsion pipe and the propulsion pipe, and is a cylindrical steel pipe having a constant length and arc. Characterized in that consisting of a medium pressure pipe and a jack of the fixed pressure fixed to the rear end of the composite medium pressure pipe.

In addition, the semi-shielded tunnel excavation method using a composite medium pressure pipe according to the present invention for achieving the above object is a composite medium pressure S-type pipe with a composite medium pressure jack and a blocking device, and a composite medium pressure T-type pipe with a built-in bolt box Assembling a complex pressure pipe (I); In order to install the compound pressure pipe, a plurality of propulsion pipes are connected to the rear end of the excavator, and a pressure jack is installed at the rear end of the propulsion pipe, and the main pressure jack is contracted and inflated, and the propulsion pipe is stroked by the stroke of the pressure jack. After the propulsion, the step of installing a compound pressure pipe between the propulsion pipe and the propulsion pipe (II); After advancing the excavator by the stroke of the composite medium pressure jack using the composite medium pressure jack installed in the composite medium pressure S-type pipe, pushing the propulsion pipe by the stroke of the composite medium pressure jack, and then, Arranging the segments therebetween, and repeating the stroke of the compound medium pressure jack installed in the compound medium pressure S-shaped pipe to drill the leading propulsion pipe (III); After the step (III), the tunnel is constructed by sequentially repeating the step (IV) of advancing the final composite pressure pipe by advancing the stroke of the main pressure jack.

Complex medium pressure pipe, medium pressure T type pipe, medium pressure S type pipe, propulsion pipe, breaker, excavator

Description

The semi shield excavator and it's tunnel excavation method with complex double pressure pipe}

The present invention relates to a semi-shielded excavation device and a tunnel excavation method using a compound pressure pipe during the excavation of the tunnel by mechanized construction. Applied to mechanized tunnel excavation work where the semi-shield method itself is limited in design and construction, such as the increase in stress of propulsion pipe due to the peripheral frictional force caused by jamming phenomenon, or the delay of air due to the use of multiple heavy pressure pipes. The present invention relates to a semi-shielded excavation device and a tunnel excavation method using a composite heavy pipe.

In general, the semi-shield driving method is an open method for constructing pipelines or tunnels such as electric power, communication, water, and gas, which are urban infrastructures, and where there are many groundwaters and underground obstacles. It is a method of excavating a tunnel that is difficult to construct by cut method) through mechanical equipment, and excavates the ground as the cutter head on the front of the excavator rotates, and then contracts the relaxed pressure jack again. It is a repetitive process of installing the propulsion pipe in the space, and the entire propulsion pipe is flowed by the pressure jack installed in the vertical sphere, and it is a method of advancing.

Therefore, the semi-shield method as described above is constructed using a medium pressure pipe 20 as shown in Figure 1 at a distance of 100m or more.

This reduces the peripheral friction with the outer circumferential surface due to the jamming phenomenon caused by stone powder, etc. Also, when the thrust is small due to the force of the original pressure jack alone, it is difficult to propel, and installs several heavy pressure pipes 20 by thrust calculation. No. 1) Advance the excavator by the stroke of the medium pressure jack 21 using the medium pressure jack 21 inherent in the medium pressure pipe 20, and then the second (No. 2) medium pressure pipe 20 To advance the contraction of the middle pressure jack (21) of the first medium pressure pipe (20) which is elongated to move forward and at the same time to be pushed forward, and finally pushes the last pressure pipe (20) by advancing the primary pressure jack. Underground tunnels are built with one cycle.

However, in the semi-shield method as described above, the longer the excavation length, the longer the installation quantity of the medium pressure pipe 20 increases according to its length, so that one propulsion pipe 40 2.5m is installed with a length of 30-70cm of one cycle. In order to move 4 to 8 strokes in one medium pressure jack (21) innumerably as much as the number of medium pressure pipes (20), the loss of air is generated, in the case of a long distance, the medium pressure pipe (20) and the propulsion by the thrust calculation Considering that the distance of the pipe 40 is about 80 m, the frictional force with the outer circumferential surface increases due to the jamming phenomenon in the medium pressure pipe 20 at any one place, which causes a very dangerous case.

In addition, the semi-shielded medium pressure pipe method as shown in Figure 1, the medium pressure pipe 20 is composed of a medium pressure T-type pipe 23, medium pressure S-type pipe 22, the medium pressure T-type pipe 23 There are two rubber rings 26 in front of the), and a lubricant inlet 27 is formed between the rubber ring 26 and the rubber ring 26, the lubricant is injected into the lubricant inlet 27 to the outside pressure Reducing the friction between the S-shaped pipe 22 and the medium pressure T-shaped pipe 23 to move forward while relaxing, and after the operation is inserted between the propulsion pipe 40 and the propulsion pipe 40 to form a tunnel of the medium pressure pipe 20 It cannot be reused.

In the semi-shield method as described above, it is difficult to modify the excavation direction of the excavator and the propulsion pipe 40 in a number of sharp curves and long distances of about 1km, the curvature due to the spatial constraints in the underground of the city and the difficulty of passing through civilian land When excavation of curved sections with small radius is unavoidable, it is practically impossible to use, and due to the peripheral frictional force caused by jamming phenomenon, in which the drilling part of the excavator is confined in the hole and becomes impossible to rotate, Due to the delay of the air due to the use of the heavy pressure pipe 20, the construction of the membrane is not applicable, and in the case of tunnel excavation in an environment where the independence of the membrane is insufficient and the excavator is difficult to use, the end of the membrane is collapsed. There is a problem that a safety accident may occur.

Accordingly, the present invention has been made to solve the problems described above, by using a composite heavy-duty pipe consisting of a composite heavy-duty S-type pipe and a composite heavy-pressure T-shaped pipe, jamming phenomenon even in a continuous sharp curve section and a long distance section of more than 1km It can be installed without obstacles, prevents air delay due to the use of multiple heavy pressure pipes, and eliminates the need for the construction of vertical tunnels in the rear tunnels and large sections required for the application of multiple heavy pipes in the semi-shield method. And to provide a semi-shielded excavation device and a tunnel excavation method using a compound pressure pipe to obtain an economic effect.

Semi-shielded excavation device using a compound pressure pipe according to the present invention for achieving the above object is an excavator; The propulsion pipe, which is connected to the rear end of the excavator, is installed between the propulsion pipe and the propulsion pipe, and is a cylindrical steel pipe having a constant length and arc. Characterized in that consisting of a medium pressure pipe and a jack of the fixed pressure fixed to the rear end of the composite medium pressure pipe.

In addition, the semi-shielded tunnel excavation method using a composite medium pressure pipe according to the present invention for achieving the above object is a composite medium pressure S-type pipe with a composite medium pressure jack and a blocking device, and a composite medium pressure T-type pipe with a built-in bolt box Assembling a complex pressure pipe (I); In order to install the compound pressure pipe, a plurality of propulsion pipes are connected to the rear end of the excavator, and a pressure jack is installed at the rear end of the propulsion pipe, and the main pressure jack is contracted and inflated, and the propulsion pipe is stroked by the stroke of the pressure jack. After the propulsion, the step of installing a compound pressure pipe between the propulsion pipe and the propulsion pipe (II); After advancing the excavator by the stroke of the composite medium pressure jack using the composite medium pressure jack installed in the composite medium pressure S-type pipe, pushing the propulsion pipe by the stroke of the composite medium pressure jack, and then, Arranging the segments therebetween, and repeating the stroke of the compound medium pressure jack installed in the compound medium pressure S-shaped pipe to drill the leading propulsion pipe (III); After the step (III), the tunnel is constructed by sequentially repeating the step (IV) of advancing the final composite pressure pipe by advancing the stroke of the main pressure jack.

As described above, the semi-shielded excavation device and the tunnel excavation method using the composite pressure pipe according to the present invention increases the stress of the propulsion pipe due to the frictional force caused by the jamming phenomenon in several sharp curves and the long-distance propulsion In the mechanized tunnel excavation work, which is difficult to apply design and construction due to the delay of air due to the use of heavy pressure pipes, the complex medium pressure pipes are applied to the semi-shield method in the mechanized tunnel excavation work. Construction is possible without obstacles due to jamming, no air delay occurs due to the use of a number of heavy pressure pipes, and there is no need for construction of the rear tunnel and the vertical section of the large section required when applying the shielding method. One device can satisfy both semi-shield and shielding methods, There are convenient advantages.

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

Semi-shielded excavation device using a compound pressure pipe according to the present invention is an excavator 46; The propulsion pipe 40 is installed in the rear end of the excavator 46 is connected to the plurality, and the propulsion pipe 40 is installed between the propulsion pipe 40 and the propulsion pipe 40, the composite steel pipe having a constant length and arc It consists of a composite medium pressure pipe 10 composed of a medium pressure S-shaped pipe 12 and a composite medium pressure T-shaped pipe 13 and a primary pressure jack 41 fixedly installed at the rear end of the composite medium pressure pipe 10.

Figure 2 is an exemplary view showing a complex pressure pipe of the semi-shielding excavator according to the present invention, Figure 3 is a perspective view showing a blocking device of the semi-shielding excavator according to the present invention.

As shown in these figures, the composite medium pressure S-shaped tube 12 is formed in the front of the socket 14 to be connected to the propulsion pipe 40, the rubber ring 16 is attached to the upper end of the socket 14 The steel pressure plate 15 is installed on the left and right sides of the socket 14, and the compound pressure jack 11 is installed at the upper and lower ends of the steel pressure plate 15, and at the upper end of the compound pressure jack 11. Blocking device 30 is attached to block the introduction of foreign matter.

In addition, the composite medium-pressure T-shaped tube 13 is an outer appearance is a circular steel pipe, the inside is a circular structure filled with concrete, a bolt box 17 is installed on the inner upper end of the composite medium-pressure T-shaped tube 13, the rear part The rubber ring 16 is installed.

That is, the composite pressure pipe (10) is a cylindrical steel pipe having a constant length and arc is composed of a composite medium pressure S-type tube 12 and a composite medium pressure T-type tube (13), the composite medium pressure S-type tube (12) When the jack 11 is operated, the steel pressure plate 15 is installed to apply an even pressure to the segment 50 consisting of several pieces, and external groundwater, etc., do not flow into the inner rear portion of the composite heavy-pressure S-shaped pipe 12. Blocking device is built in to prevent the block, the front part is configured in the shape of a socket 14 having a rubber ring 16 to be connected to the preceding propulsion pipe 40, the segment 50 and the composite heavy-pressure T-pipe 13 and Bolt box 17 is built to be connected.

In addition, the compound pressure T-shaped tube 13 has a rubber ring 16 is built in so that foreign matter does not flow into the blocking device 30 until the use of the compound pressure pipe 10.

Here, the blocking device 30 is a reinforcement welding of the iron plate 31 on the iron brush 31 to correspond to the inflow of groundwater from the outside in the state of overlapping a plurality of iron brushes 31, the opposite direction of welding is open The iron brush 31 and the iron plate 32 open in the segment direction when the inflow of the ground water outside serves to block it.

In addition, a grease injection pipe 34 is embedded in the iron brush 31 of the blocking device 30 so as to inject high viscosity grease into the iron brush 31, and injects high viscosity grease through the grease injection pipe 34. Grease penetrates into the blocking device 30 to further suppress external groundwater inflow.

Hereinafter, the process of tunnel excavation with a semi-shielded excavation device using the composite pressure pipe according to the present invention having the configuration as described above will be described.

4A to 4F are process diagrams showing a state in which a tunnel is excavated with a semi-shielded excavation apparatus using a composite pressure pipe according to the present invention.

As shown in these drawings, the semi-shielded excavation method using a composite pressure pipe according to the present invention is the front of the composite medium pressure jack 11 and the composite medium pressure S-type pipe 12 is attached to the blocking device 30, the bolt box Step (I) of assembling the compound pressure pipe (10) by connecting the compound pressure medium (13) built-in (17); In order to install the compound pressure pipe 10, a plurality of propulsion pipes 40 are connected to the rear end of the excavator 46, and a pressure jack 41 is installed at the rear end of the propulsion pipe 40, After contracting and expanding the primary pressure jack 41 to propel the propulsion pipe 40 by the stroke of the primary pressure jack 41, the composite pressure pipe 10 is disposed between the propulsion pipe 40 and the propulsion pipe 40. Step (II); After advancing the excavator 46 by the stroke of the composite medium pressure jack 11 by using the composite medium pressure jack 11 installed in the composite medium pressure S-shaped pipe 12, the propulsion pipe by the stroke of the complex medium pressure jack 11 is applied. After the propulsion (40), the segment 50 is installed between the pre-installed composite pressure pipe 10 and the composite pressure pipe 10, the composite pressure jack 11 provided in the composite pressure S-type pipe (12) Repeating the stroke to drive the leading propulsion pipe 40 (III); After the step (III) at the end to advance the stroke of the original pressure jack (41) to repeat the step (IV) to press the final compound pressure pipe 10 in sequence to build a tunnel.

Here, the composite heavy-pressure S-shaped pipe 12 of the composite heavy-duty pipe 10 is advanced while being extended in the excavation direction of the excavator 46 by the composite heavy-pressure T-shaped pipe 13 by the reaction force at the same time. Sliding along the outer circumferential surface of the composite heavy-pressure T-type tube 13 and the end of the shut-off device 30 stops at the portion where the bolt box 17 of the complex heavy-pressure T-type tube 13 is located, the relaxed composite pressure jack (11) in the space created by shrinking the segment 50 is assembled and connected to the bolt box 17 of the composite heavy-pressure T-shaped tube 13, and then the composite medium pressure jack (11) is extended by the reaction force of the assembled segment (50) By assembling the second segment 50, wherein the blocking device 30 of the compound pressure S-type pipe 12 is located in the first segment 50 that is already out of the compound pressure T-type pipe 13, The segment 50 and the segment 50 are assembled by bolts in a repeated process of connection.

That is, Figures 4a and 4b shows the process before the conversion to the shield TBM method, the barrier element in advance to facilitate the transport of the segment 50 to the composite pressure pipe 10 during the semi-shield method characteristics and the subsequent conversion method. For the purpose of removal, the propulsion pipe 40 was propelled to a predetermined distance (10 m) so that the Ito pump 42, the transformer 43, the power pack 44, the emitter 45, and the like were installed. The installation of the composite medium pressure pipe 10 of the invention is shown.

4c illustrates the use of the composite medium pressure pipe 10 of the present invention in a general medium pressure pipe in the semi-shield method using the propulsion pipe 40 currently being implemented, and the composite pressure pipe 10 according to the present invention. ) Is used as a general medium pressure pipe in the semi-shield method, the shield TBM method has a feature that can also be used as a composite medium pressure pipe (10).

In detail, the conventional heavy pressure pipe 20 is a heavy pressure pipe installed by the thrust calculation when the thrust is small due to the increase in the outer circumferential surface and the peripheral frictional force due to jamming, etc. 20), the construction order is to use the one-way jack 41 of the vertical sphere as shown in Figure 4c to promote the capacity of the one-way jack 41, and then No. 2 Install the medium pressure pipe (20). 1 After the excavator 46 is advanced by the stroke of the medium pressure jack 21 by using the medium pressure jack 21 incorporated in the medium pressure pipe 20, No. 1 Propulsion pipe 40 installed after the medium pressure pipe 20 is No. 1 While contracting the stroke of the medium pressure jack 21 of the medium pressure pipe 20, the propulsion is again carried out using the original pressure jack 41.

In addition, 1 After the operation of the medium pressure pipe 20, the front earth pressure is no. 1 is offset by the medium pressure pipe 20, and after that, the medium pressure pipe 20 is used as a reference, and after propelling the distance corresponding to the capacity of the medium pressure pipe 20, No. 2 Install the medium pressure pipe 20 to move forward in a repetitive operation, and at the end to advance the original pressure jack 41 to build the underground tunnel as a cycle by pushing the last medium pressure pipe (20).

However, the existing medium pressure pipe 20 as described above is limited in the number of installation of the medium pressure pipe 20. As described above, in order to install the propulsion pipe 40 one by one cycle (2.5m) by moving a number of medium-pressure pipes 20 by one cycle, a number of repetitive operations must be performed, and the long-distance section of the medium-pressure pipe 20 This is because the probability of jamming due to stone powder may be increased between the medium pressure pipe 20 and the medium pressure pipe 20 at any one place as the quantity of N) increases.

Therefore, in order to solve the above problems, the composite pressure pipe 10 is used, but the shape of the composite pressure pipe 10 is the same as that of the existing pressure pipe 20, but the structure and the purpose of use are characterized. can do.

Figure 4d shows a method conversion to the shield TBM, the composite heavy-duty S-type tube 12 of the composite heavy-duty tube 10 is a composite heavy-pressure T-shaped tube 13 by the composite heavy-duty jack 11 to the reaction force extruder ( 46 is advanced while extending in the excavation direction, at this time sliding the outer circumferential surface of the compound pressure T-type tube 13, the end of the blocking device 30 is a bolt box 17 of the compound pressure T-type tube 13 After stopping at the part, the segment 50 is assembled with the bolt box 17 of the compound heavy-pressure T-shaped pipe 13 in the space created by contracting the relaxed compound heavy pressure jack 11 to prevent the inflow of fluids such as groundwater, Thereafter, the composite pressure jack 11 is stretched by the reaction force of the assembled segment 50 to assemble the second segment 50. At this time, the blocking device 30 of the composite heavy-pressure S-type pipe 12 is already a composite heavy-pressure T-type pipe ( 13) completely off and positioned on the first segment 50, bolting segments 50 and 50 with the above repeated process. It consists of a series of processes for assembling.

In addition, the composite pressure pipe 10 according to the present invention is characterized in that it can be removed and reused, which is illustrated in FIGS. 4e and 4f, and a semi-shielded tunnel excavation method using the composite pressure pipe according to the present invention. Silver shield TBM method used in the conversion of the composite medium pressure pipe (10), unlike the conventional medium pressure pipe (20) is a device that prevents the inflow of external groundwater, etc. in front of the composite medium pressure T-type pipe (13) Rather, it is attached to the inner end of the composite medium pressure S-shaped pipe 12, so that the semi-shielded method and the shield TBM method can be performed in parallel, the composite medium pressure S-type pipe 12 is a composite medium pressure T-type pipe (13) to Sliding on the segment 50 is characterized in that it is manufactured to be separated while advancing.

And the composite heavy-pressure T-type pipe 13 used in the conversion to the shield TBM method of the present invention is easy to assemble with the segment 50, which is a different type, the bolt box 17 is assembled to the bolt so that groundwater does not flow It is installed.

As described above, it has been difficult to apply the semi-shield method to the continuous sharp curve and the long distance section until now, but the present invention uses the composite heavy pipe 10, so that even the semi-shielded mechanical tunnel rig can be used for site conditions. There is an effect that enables smooth construction without receiving.

1 is an exemplary view showing a conventional pressure shield for semi-shielding excavator,

Figure 2 is an exemplary view showing a complex pressure pipe of the semi-shielding excavator according to the present invention,

Figure 3 is a perspective view showing a blocking device of the semi-shielding excavator according to the invention,

Figures 4a to 4f is a process diagram showing a state of excavating a tunnel with a semi-shielded excavation device using a composite pressure pipe according to the present invention.

Explanation of symbols on the main parts of the drawing

10: compound pressure pipe 11: compound pressure jack

12: Compound medium pressure S-type tube 13: Compound medium pressure T-type tube

14: socket 15: steel pressure plate

16: rubber ring 17: bolt box

20: Conventional medium pressure pipe 21: Medium pressure jack

22: medium pressure S type pipe 23: medium pressure T type pipe

24: socket 25: steel pressure plate

26: rubber ring 27: lubricant inlet

30: breaking device 31: iron brush

32: iron plate 33: brush and iron plate welding plate

34: grease injection pipe 40: propulsion tube

41: Pressure Jack 42: Ito Pump

43: transformer 44: power pack

45: director 46: excavator

50: segment

Claims (7)

An excavator 46; The propulsion pipe 40 is installed in the rear end of the excavator 46 is connected to the plurality, and the propulsion pipe 40 is installed between the propulsion pipe 40 and the propulsion pipe 40, the composite steel pipe having a constant length and arc Composed of a medium pressure pipe (10) consisting of a medium pressure S-shaped pipe (12) and a compound medium pressure T-shaped pipe (13) and a primary pressure jack (41) fixed to the rear end of the composite medium pressure pipe (10), the composite medium pressure S The mold pipe 12 is formed in the front portion of the socket 14 to be connected to the propulsion pipe 40, the rubber ring 16 is attached to the upper end of the socket 14, the steel material on the left and right sides of the socket 14 The pressure plate 15 is installed, and the upper and lower ends of the steel pressure plate 15, the compound heavy pressure jack 11 is installed on the inside, the blocking device 30 to block the inflow of foreign matter on the upper end of the compound heavy pressure jack (11). Is attached, The blocking device 30 is reinforced with an iron plate 32 on the iron brush 31 to cope with the inflow of external ground water in a state in which several iron brushes 31 are overlapped, and a predetermined portion is open to inflow of the ground water outside. Semi-shielded excavation device using a composite heavy-duty pipe, characterized in that the iron brush 31 and the iron plate 32 in the segment direction. delete delete The method of claim 1, The iron brush 31 is a semi-shielded excavation device using a compound pressure pipe, characterized in that the grease injection pipe 34 is built to inject high viscosity grease therein. delete The front is connected to the composite medium pressure jack (11) and the composite medium pressure S-type pipe (12) attached to the shut-off device 30, and the composite medium pressure T-type pipe (13) with the built-in bolt box (17) Assembling the step (I); In order to install the compound pressure pipe 10, a plurality of propulsion pipes 40 are connected to the rear end of the excavator 46, and a pressure jack 41 is installed at the rear end of the propulsion pipe 40, After contracting and expanding the primary pressure jack 41 to propel the propulsion pipe 40 by the stroke of the primary pressure jack 41, the composite pressure pipe 10 is disposed between the propulsion pipe 40 and the propulsion pipe 40. Step (II); After advancing the excavator 46 by the stroke of the composite medium pressure jack 11 by using the composite medium pressure jack 11 installed in the composite medium pressure S-shaped pipe 12, the propulsion pipe by the stroke of the complex medium pressure jack 11 is applied. After the propulsion (40), the segment 50 is installed between the pre-installed composite pressure pipe 10 and the composite pressure pipe 10, the composite pressure jack 11 provided in the composite pressure S-type pipe (12) Repeating the stroke to drive the leading propulsion pipe 40 (III); After the step (III) at the end, the step of repeating the step (IV) of pressing the final compound pressure pipe (10) by advancing the stroke of the jack jack 41 to build a tunnel, characterized in that to build a tunnel Semi-shielded tunnel excavation method. The method of claim 6, The composite heavy-pressure S-shaped pipe 12 of the composite heavy-duty pipe 10 is advanced while being extended in the drilling direction of the excavator 46 by the composite heavy-pressure T-shaped pipe 13 by the reaction force in the composite pressure jack 11 and at the same time Sliding along the outer circumferential surface of the medium-pressure T-type tube 13 and the end of the shut-off device 30 stops at the position where the bolt box 17 of the compound medium-pressure T-type tube 13 is located, the relaxed composite medium pressure jack 11 Segment 50 is connected to the bolt box 17 of the composite heavy-pressure T-shaped tube 13 in the space created by contraction), and then the composite heavy-pressure jack 11 is extended by the reaction force of the assembled segment 50. Assemble the first segment 50, wherein the blocking device 30 of the composite medium pressure S-shaped tube 12 is located in the first segment 50 that is already out of the composite medium pressure T-shaped tube 13, the above repetition Semi-composite using composite pressure pipe, characterized in that the segment 50 and the segment 50 is assembled by bolts in the process Shield tunnel excavation method.

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