KR102394424B1 - Concrete box for tunnel constrction and construction method of tunnel using it - Google Patents

Abstract

The present invention relates to a technology for constructing a tunnel by propelling or towing a pre-manufactured box while excavating the ground in a tunnel direction, wherein the box comprises a body positioned in the center and first and second surface parts integrally extending from both side ends of the body, a first step is formed between the body and the first surface part, a second step is formed between the body and the second surface part, and an airtight steel plate protruding outward is installed on the first surface part. According to the present invention, efficiency and economic feasibility of construction can be improved by preventing a fluid such as grout from entering the box during work.

Description

Tunnel construction box and tunnel construction method using the same

The present invention relates to the construction of a tunnel, which is an underground structure, and more particularly, to a technique for constructing a tunnel by propulsion or towing of a prefabricated enclosure while excavating underground in the direction of the tunnel.

There are two types of construction methods for constructing tunnels and underpasses through crossing construction in the lower part of roads and railroads, and there are open and non-opening methods. The excavation method is a method of installing a structure after digging in the ground and then refilling the soil. It has the advantage of stabilizing construction because the structure can be installed in the inner space after excavation. Since there are problems such as control, in order to solve this problem, a number of non-opening methods have been developed and used so that underground structures can be installed directly from the side without occupying the road.

A typical example that can construct a tunnel using the non-open method is the enclosure method, which is a method in which a pre-fabricated concrete enclosure is continuously propelled or towed and inserted into the excavated space along with the progress of the excavation work in the front. .

The above-described enclosure method generally requires sufficient free space to install the arrival and departure bases at the front and rear of the tunnel to be built, so it is difficult to apply it in a narrow environment, and also prevents the subsidence of the excavated space. In addition, it is common to press-fit the steel pipe into the ground around the excavation space to reduce the frictional force generated on the outer surface of the enclosure, which delays the construction period and increases the construction cost.

In order to solve this problem, the applicant of the present invention has proposed a method of constructing an underground structure through the repeated process of fore-forward-structure and fuchujin through registration number 10-1737628.

As shown in FIG. 1, the method of constructing an underground structure of registration No. 10-1737628 above uses the shoe propelling body 20 as a reaction force and inserts the press-fit shoe 20 into the ground to excavate the inside while excavating the protection pipe 40. It is inserted into the space, and then the housing (B) is inserted into the protective tube 40 using the propulsion jack 51 installed on the structure reaction arm 70 of the forward base.

Accordingly, the underground structure construction method of Registration No. 10-1737628 not only enables the construction of the tunnel by the enclosure method even if only the oscillator is installed at the rear of the construction space of the tunnel, but also requires the process of inserting the steel pipe into the ground itself. It was made possible to promote economic feasibility through application to a narrow working space and simplification of the process.

However, in the underground structure construction method of registration number 10-1737628 above, it is not easy to apply this when there is a curved section of the tunnel because the protection pipe is composed of one for the entire section of the tunnel. In addition, when the size of the enclosure (B) is large, if a plurality of enclosures (B) are to be propelled simultaneously only with the propulsion jack 51 installed on the reaction arm 70, the propulsion speed of the enclosure is slowed and the construction period is increased. there is. In addition, since the space between the press-fit shoe 10 and the shoe propelling body 20 and the protective pipe 40 is not sealed, the grouting material injected into the ground to prevent collapse of the excavation surface seeps into the protective pipe 40 and the grouting operation is properly performed. Not only does it not lose, it can also become a factor that prevents the smooth entry of the body (B).

KR 10-1737628 B1

The present invention is intended to solve the problems of the prior art, and the tunnel section can be applied regardless of various tunnel shapes such as curved sections or the size of the enclosure, and the entry of the enclosure into the excavation space is smooth It is made, and it is intended to provide a housing for tunnel construction and a tunnel construction method using the same, which can promote efficiency and economy of construction by preventing fluid such as grouting material from permeating into the interior of the housing during the work process.

According to the most preferred embodiment of the present invention for solving the above problems, the body portion located in the center, and the first and second surface portions extending to both ends of the body portion to be integrally configured, the body portion and the first A first step is formed between the face parts, a second step is formed between the body part and the second face part, and an airtight steel plate protruding to the outside is installed on the first face part. provided

In this case, the length of the airtight steel plate protruding from the first surface portion may be equal to the length of the second surface portion or smaller than the length of the second surface portion.

In addition, an elastic sealing material may be attached to at least a portion of the inner surface of the airtight steel sheet. In this case, the elastic airtight accommodating member may have a structure in which a plurality of face members are installed to cross forward and backward, or a structure in which a plurality of wire rods are installed densely.

In addition, a hinge protrusion may be formed on the inner surface of the airtight steel plate. At this time, the hinge protrusion may be positioned at the center of the protruding portion of the airtight steel plate, and the elastic airtight accommodating material may be attached only to the outer direction of the hinge protrusion. In addition, when the hinge protrusion is installed as described above, the length of the second step may be formed by the sum of the length of the first step and the height of the hinge protrusion.

In addition, an injection pipe may be installed on the inner surface of the airtight steel plate, and in this case, the injection pipe may be configured such that at least a part thereof can be removed.

According to the most preferred embodiment of the construction method of the present invention, as using the above-described enclosure, a) disposing a tip excavation body and a plurality of enclosures for underground excavation; b) after adjusting the forward direction of the tip excavator, using a propulsion jack installed at the rear of the excavator to enter it into the ground and perform excavation; c) After adjusting the forward direction of the first enclosure located at the forefront, propel the enclosure with a propulsion jack installed at its rear to enter the ground, and in the same way, except for the nth enclosure located at the rearmost side of the enclosure 100 After all the propulsion is made, the n-th enclosure (100-n) is towed using a traction jack 320 installed in the rear thereof; d) When step c) is repeated and the first enclosure reaches the planned position, after removing the propulsion jack between the first and second enclosure together with the tip excavator, the second enclosure with the propulsion jack behind the second enclosure adhering to the first enclosure by propulsion, and removing the remaining propulsion jacks in the same manner, while adhering the remaining enclosures except the n-th enclosure to the front enclosure; e) after attaching the n-th housing to the front of the housing using a traction jack, removing the traction jack; is provided.

The tip excavator applied at this time is composed of a press-fit shoe located at the tip and a shoe propelling body for propelling the press-fit shoe, and an injection hole communicating with the outside may be installed in the shoe propelling body.

In this regard, by installing the elastic material barrier member on the earth wall around the excavation target surface before advancing the tip excavation body in step b) toward the excavation target surface, when the tip excavation body advances, the It can be sealed between the excavation surface and the top surface of the tip excavation body as the end surface is attached.

When the injection hole is installed as described above, advancing and excavating the tip excavator in step b) is performed while spraying the bentonite solution into the underground soil through the injection hole.

In addition, the propulsion and traction in step c) can be made after the lubricating water is injected into the gap between the airtight steel plate and the upper surface of the housing.

In addition, the adhesion in steps d) and e) can be made after the water stop plate is installed between each housing, and similarly, the adhesion in steps d) and e) is in the gap between the airtight steel plate and the upper surface of the housing. It can be done after the dry bibim mortar is filled.

According to the present invention, an airtight steel plate is installed between each enclosure, an elastic airtight container is installed therein, and a lubricating index liquid is injected. Lubrication of the lubricating index fluid while preventing the grout material injected into the enclosure or the fluid such as bentonite liquid injected into the ground from leaking into the enclosure by the lubricating index liquid injected into the airtight steel plate and the elastic sealing material for smooth entry into the enclosure By function, the underground entry of the hull can proceed efficiently.

In addition, in the present invention, while varying the length between the first and second steps of the enclosure, a hinge protrusion is configured on the bottom surface of the airtight steel plate. It allows the excavator or the enclosure to move easily up, down, left and right. Therefore, it is possible to freely adjust the forward direction of the tip excavator and the enclosure, thereby improving the precision of construction and also having versatility that can be applied to both straight and curved sections of the tunnel.

In addition, the present invention makes it unnecessary to install a reaction arm by allowing propulsion and traction by using the dead weight of the housing, thereby improving the hardiness according to the reduction of the working process.

1 is a cross-sectional view of the prior art disclosed by the applicant of the present invention.
2 is a perspective view and a cross-sectional view of a housing according to an embodiment of the present invention.
Figure 3 is an explanatory view of the action of the airtight means installed in the housing of the present invention.
4 is a perspective view of another embodiment of the airtight means.
5 is an embodiment of each detail regarding the airtight means of FIG.
6 and 7 show each embodiment related to the installation of the injection tube.
8 is a perspective view of the tip excavated body of the present invention.
9 to 13 are explanatory views of each step of constructing a tunnel using the enclosure of the present invention.
14 is a cross-sectional view of another embodiment related to the application of the sealing means of the present invention.
15 is a cross-sectional view of each embodiment of the guide shaft structure of the present invention.

Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings. However, in the description of the present invention, in the case of obscuring or obscuring the technical idea of the present invention due to the detailed description of the known configuration, the description of the known configuration will be omitted.

The present invention allows the pre-fabricated enclosure 100 to enter the ground to build a tunnel, but to free the tunnel's traveling direction and to facilitate adjustment of the entry direction of the enclosure 100 as well as to reinforce the underground soil In order to prevent the grout material 143 or bentonite injected into the ground from permeating into the housing 100 , FIG. 2 shows an embodiment of the housing 100 , and FIG. 3 is the The operation of some of the components of the housing 100 has been described with the drawings.

The housing 100 of the present invention, as shown in FIG. 2 , includes a body portion 110 and a first surface portion 120 and a second surface portion 130 located on both sides of the body portion 110 , is composed

The body part 110 is the main body part of the housing 100 and is located in the center and has a reinforced concrete structure.

The first surface portion 120 formed on one side and the second surface portion 130 formed on the other side are also of a reinforced concrete structure, extend from both ends of the body portion 110, and are integrally configured and interconnected to form a single tunnel to be able to build The housing 100 configured as described above is provided with a strand insertion groove 101 penetrating the first surface portion 120 and the second surface portion 130 .

The distinction between the first surface part 120 and the second surface part 130 is referred to for convenience of description regardless of the specific location thereof. Therefore, the first surface portion 120 is located in front of the body portion 110, the second surface portion 130 may be located in the rear of the body portion 110, the first surface portion 120 of the body portion (110) It may be located in the rear and the second surface part 130 may be located in the front.

At this time, the present invention provides an airtight means between the first and second surface portions 120 and 130 adjacent to each other, so that the grout material 143 injected first for reinforcement of the soil portion loosened by excavation as described above. The fluid, such as the injected bentonite liquid 144, is prevented from leaking into the working space, such as the housing 100, so that the housing 100 can enter smoothly. Of course, the airtight means may also serve as a water blocking function for groundwater.

The airtight means may be installed on either side of both ends of the body part 110, but by installing it at the rear of the body part 110, when the airtight means is also installed in the tip excavation body 200 to be described later, the direction consistent with this It is preferable to have

For convenience of description, the description here will be described by exemplifying that the airtight means is installed on the first surface portion 120 while exemplifying that the first surface portion 120 is positioned at the rear of the body portion 110 . In addition, the housing 100 may have a shape of a square cross-section or a shape of a circular cross-section.

3 is a view showing the action of the airtight means described above.

The first surface portion 120 configured at one end of the body portion 110 (the rear end of the body portion 110 in the example of this description) has an airtight means to the outside, that is, as shown in Fig. 3 (a). The airtight steel plate 121 protruding toward the rear is installed. The airtight steel plate 121 may be installed on all of the first surface portion 120 provided on the upper, lower, left, and right four surfaces of the body portion 110, or may be installed only on the remaining surfaces except for the lower portion. The receiving space (121a) into which the second surface portion 130 of the adjacent housing 100 is inserted by these airtight steel plates 121 is formed.

A first step 111 is formed between the body portion 110 and the first surface portion 120 so that the airtight steel plate 121 can be installed on the first surface portion 120 as described above. At this time, it is preferable that the length (a) of the first step 111 coincides with the thickness (t) of the airtight steel plate 121 so that the outer surface of this part forms the same plane as the outer surface of the body part 110 . .

The airtight steel plate 121 covers the upper surface of the second surface portion 130 of the adjacent housing 100 to seal the space between the first surface portion 120 and the second surface portion 130, as shown in FIG. 3(b). make it Accordingly, a second step 112 corresponding to the first step 111 is also formed between the body portion 110 and the second surface portion 130 .

At this time, the length (b) of the second step 112 is longer than the length (a) of the first step 111 so that a gap 103 is formed between the airtight steel plate 121 and the second surface portion 130 . can do. As will be described later, when the hinge protrusion 123 is formed on the inner surface of the airtight steel plate 121 on the receiving space 121a side, the second step 112 is the length (a) of the first step 111 and the hinge protrusion ( 123), it is preferable to have a length that is the sum of the heights (h), so that when the enclosures 100 are connected, the airtight steel plate 121 does not roll and the gap 103 to be described later is maintained.

The lubricating index liquid 141 is injected into the gap 103 between the airtight steel plate 121 and the upper surface of the housing 100, more specifically, the gap 103 between the airtight steel plate 121 and the second surface part 130. can The lubricating index fluid 141 forms a sealing film by surface tension without flowing out from the gap 103 between the airtight steel plate 121 and the second surface part 130, so that the fluid flows into the housing 100. In addition to reliably blocking the inflow, the enclosure 100 is lubricated in the gap 103 between the propulsion of the enclosure 100 by the propulsion jack 310 or the traction of the enclosure 100 by the traction jack 320 . ), the propulsion or traction work is very smooth. Accordingly, an injection pipe 124 may be further installed on the inner surface of the airtight steel plate 121 as described later.

In addition, in the airtight steel plate 121 , the length protruding from the first surface portion 120 is preferably smaller than the length of the second surface portion 130 , but may be the same as the length of the second surface portion 130 .

For example, when installing the water stop plate 322 to reinforce the watertightness between each housing 100, the thickness of the compressed water stop plate 322 should be considered together and the protrusion length of the airtight steel sheet 121 should be set. However, if the water stop plate 322 is not installed, the protrusion length of the airtight steel plate 121 may be the same as the length of the second surface portion 130 as in the latter case.

4 and 5 illustrate another sealing means, FIG. 4 shows the overall shape of the hermetic means, and FIG. 5 shows an embodiment of each detail related thereto.

The airtight means according to the embodiment of FIG. 4 has a structure in which the elastic airtight receiving material 122 is further attached to at least a portion of the inner surface of the airtight steel plate 121 .

The elastic sealing material 122 allows the sealing force of the lubricating index solution 141 injected into the gap 103 between the airtight steel plate 121 and the second surface part 130 to be more effectively generated.

As shown in FIG. 5(a), the elastic airtight receiving material 122 may have a structure in which numerous wire rods 122b are densely embedded in the inner surface of the airtight steel plate 121, as shown in FIG. 5(b) As shown in, it may be of a structure in which a plurality of face members 122a are installed to cross forward and backward. In the latter case, the face material 122a itself also prevents the lubricating index fluid 141 from leaking out from the gap 103 between them, thereby maximizing the function of the lubricating index liquid 141 .

On the other hand, in order to allow the housing 100 to be propelled or towed in the correct direction, or to propel or tow the housing 100 in a curved direction by a curved tunnel plan, the housing 100 is moved up and down or left and right It needs to be moved or rotated in either direction.

The above-described movement induction of the housing 100 may be achieved by the gap 103 between the airtight steel plate 121 and the second surface portion 130 that enters the lower portion thereof.

At this time, by protruding the hinge protrusion 123 on the inner surface of the airtight steel plate 121, the above-described movement of the housing 100 can be made more efficiently.

The hinge protrusion 123 is such that the gaps 103 in the upper, lower, left and right of the housing 100 can be constantly maintained, and one of the hinge protrusions 123 is for the housing 100 rotation. By enabling the function of the rotation axis, the rotation of the other side is made easier. Although not shown, by forming the hinge protrusion 123 along the width of the airtight steel plate 121 to be long, it can additionally function as another means for preventing leakage of the lubricating index liquid 141 .

When the hinge protrusion 123 is formed on the inner surface of the airtight steel plate 121 as described above, the elastic airtight accommodating material 122 may be positioned only in the outer direction of the hinge protrusion 123 .

6 and 7 show each embodiment related to the installation of the injection tube 124 described above.

The injection pipe 124 is installed on the inner surface of the airtight steel plate 121 to easily inject the lubricating index liquid 141 into the gap 103, and, if necessary, the first surface portion 120 of the housing. It is configured to extend up to .

This injection pipe 124 is preferably installed so that at least a part can be removed after use.

6 is an embodiment in which the entire injection tube 124 can be removed. The injection pipe 124 is entirely made of a flexible synthetic resin material, and the cross-sectional outer diameter should not be greater than the height (h) of the hinge protrusion 123 .

7 is an embodiment in which only a part of the injection tube 124 can be removed. In this case, the injection tube 124 is installed on the inner surface of the airtight steel plate 121, and is a metal fixed tube 124a that is completely fixed thereto, and a portion located on the first surface 120 side, and is separated from the fixed tube 124a. It is composed of a separation pipe (124b) that is connected so as to be possible.

The separation pipe 124b is removed when the injection of the lubricating water stop liquid 141 into the gap 103 is completed, so that the installation of the water stop plate 322 therebetween is not interfered when the enclosures 100 are in close contact. do.

In this embodiment of FIG. 7 , the fixing tube 124a reduces frictional force so that the entry into the housing inside the accommodation space 121a can proceed smoothly, and also serves as a hinge protrusion 123 to serve as a separate hinge There is no need to install the projection 123 .

So far, each embodiment of the housing 100 for tunnel construction of the present invention has been described. Hereinafter, a method for constructing a tunnel using the housing 100 will be described.

8 is a view showing the structure of the tip excavator 200 used in the construction method of the present invention, and FIGS. 9 to 13 are for constructing a tunnel using the tip excavator 200 and the housing 100 described above. Each step of the process is described with drawings.

The tip excavation body 200 of the present invention, which is equipment for excavating the ground prior to entering the enclosure 100 into the ground, is, as shown in FIG. It consists of a shoe propulsion body 250 that propels it while adjusting the forward direction.

The cross-section of the tip excavation body 200 may have various cross-sectional shapes, such as a square or a circle, depending on the cross-sectional shape of the tunnel or the enclosure 100 to be built.

Support beams 220 and 260 are installed on each of the press-fit shoe 210 and the shoe propulsion body 250 , and a propulsion jack 310 is installed on each of the support beams 220 and 260 , respectively, and in addition, each support beam 220 and 260 . Airtight steel plates 221,261 are installed in the rear.

The airtight steel plates 221,261 installed in the rear of each support beam 220 and 260 are not different from the structure of the hermetic steel plates 121 installed in the housing 100 . That is, the receiving spaces 221a and 261a are formed by the airtight steel plates 221,261 of the tip excavation body 200, and the elastic airtight receiving materials 222,262 and the hinge protrusions 223,263 are installed on the inner surface of the airtight steel plates 221,261. It is also not different from the airtight steel plate 121 of the housing 100 that the lubricating index liquid 141 can be injected into the inner surface of these airtight steel plates 221,261.

However, the airtight steel plate 261 of the shoe propellant 250 is further provided with a spray hole 264 as will be described later.

For example, the tip excavator 200 of the present invention allows the grout material 143 for reinforcing the periphery excavated from the press-fit shoe 210 to be injected into the ground, and while filling the voids in the soil, the tip excavation body 200 Fluids such as bentonite liquid 144 for reducing the frictional force between the enclosure and the excavation surface entering the earth along the can be injected into the underground excavation surface.

For this purpose, the injection hole 264 for underground injection of a fluid such as the bentonite solution 144 to the shoe propellant 250 , more specifically, the airtight steel plate 261 of the shoe propellant 250 is configured to communicate with the outside.

The tunnel construction method of the present invention using such a tip excavation body 200 and an enclosure 100 includes: a) disposing the tip excavator 200 and a plurality of enclosures 100; b) the tip excavation body 200 After adjusting the forward direction of the, using the propulsion jack 310 installed at the rear of it to enter the ground and perform excavation, c) pushing and towing each of the enclosures 100, d) each of the enclosures 100 ) while removing the propulsion jack 310 between the steps of bringing in close contact between the rest of the housing 100 except for the housing 100 located at the rearmost side, e) the housing 100 located at the rearmost side using the tow jack 320 ) After making close contact with the housing 100 in front of it, the steps of removing the tow jack 320 are performed in a sequential manner, which will be described in detail for each step as follows.

a) disposing a tip excavation body 200 and a plurality of enclosures 100 for underground excavation (FIG. 9);

The tip excavator 200 and a plurality of enclosures 100 are arranged in series at regular intervals at the forward base built at the rear of the tunnel section to be built. As a result, a portion of the second surface portion 130 of each housing 100 is inserted into the receiving space 121a formed by the airtight steel plate 121 to form a gap 103 therebetween.

The above-described gap between the tip excavation body 200 and the housing 100 should be such that the propulsion jack 310 to be installed therebetween can be installed. To this end, the front end excavator 200 and the housing 100 may be further provided with a spacing holder 102 .

When the disposition of the tip excavation body 200 and the enclosure 100 is completed, the n-th enclosure 100-n at the rearmost end in a state where the tip of the strand 321 is fixed to the first enclosure 100-1 at the frontmost end. After passing the stranded wire 321 to ), the traction jack 320 is installed in the n-th housing 100-n of the last end and the traction jack 320 is fixed by fixing the stranded wire 321 to the traction jack 320. A tensile force can be applied to the strand 321 by the operation of A propulsion jack 310 is installed between each of the tip excavation body 200 and the housing 100 .

In addition, the lubricating water solution 141 is injected into the gap 103 between each airtight steel plate 121 and the first surface part 120 . Of course, the injection of the lubricating index liquid 141 may be made just before the propulsion or traction operation of each housing 100 made in a future step.

b) after adjusting the forward direction of the tip excavation body 200, using the propulsion jack 310 installed at the rear thereof to enter the ground and perform excavation (FIG. 10);

First, the forward direction of the excavation tip 200 is adjusted to match the direction in which the tunnel is built.

This adjustment is made by the propulsion jack 310 installed at the rear thereof. At least four propulsion jacks 310 are installed vertically and horizontally on the support beam 220 of the press-fit shoe 210, and the above adjustment is made by varying the stroke degree of these propulsion jacks 310.

Adjustment of the direction of the tip excavation body 200 is made more easily when the hinge protrusion 223 is provided on the airtight steel plate 221 . The hinge protrusion 223 functions as a rotation axis as described above.

This method of adjusting the direction of the tip excavation body 200 is applied as it is in the direction adjustment of the housing 100 to be described later.

When the tip excavation body 200 is positioned in the correct direction, the press-fit shoe 210 is entered into the ground by using the shoe propelling body 250 and excavation is performed for that part.

At this time, the grout material 143 is sprayed on the excavation surface through the press-fitting shoe 210 , and a fluid such as bentonite liquid 144 is sprayed on the excavation surface through the shoe propelling body 250 that enters thereafter. That is, the advancement of the tip excavator and the execution of excavation are performed while injecting a fluid such as the bentonite solution 144 into the underground soil through the injection hole provided in the shoe propulsion body 250 .

However, the fluid, such as the injected bentonite liquid 144, which is continuously made until the tip excavator 200 completely passes through the tunnel work section, does not leak to the outside until all propulsion or traction for the housing 100 is completed. It should remain between the excavation surface and the housing (100).

To this end, a barrier member 510 made of an elastic material may be installed on the earth wall 500 around the surface to be excavated. The barrier member 510 is installed to protrude toward the excavation target surface, and is installed before the front end of the excavation body 200 is advanced.

Therefore, when the tip excavation body 200 advances, the barrier member 510 has an end surface that protrudes toward the excavation target surface as described above and seals the space between the top surfaces of the tip excavator 200, whereby the injected bentonite Fluids such as the liquid 144 cannot leak to the outside.

c) propelling and towing each of the enclosures 100 ( FIG. 11 );

In this step, the first enclosure 100 - 1 located at the forefront of the enclosures 100 arranged in step a) is propelled by the depth excavated by the excavator at the tip 200 .

To this end, first, the forward direction of the first housing 100-1 is adjusted in the same manner as in the tip excavation body 200 . When the direction adjustment of the first housing (100-1) is completed, as in FIG. 9 (a), using all the housing 100 located in the rear as a reaction force, the propulsion jack 310 installed in the rear thereof, that is, the second The first housing 100-1 is propelled by the propulsion jack 310 installed between the first housing 100-1 and the second housing 100-2.

Propulsion is carried out in the same manner as for the first housing 100-1 for the rest of the housing 100 except for the n-th housing 100-n located in the rearmost part. That is, as in Fig. 9 (b), the second enclosure 100-2 also uses all the enclosures 100 under the third enclosure 100-3 as the reaction force, the second enclosure 100-2 and the third enclosure. It is propelled by the propulsion jack 310 installed between (100-3).

When all sequential propulsion for each housing 100 by the above-described propulsion jack 310 is made, the traction is made for the n-th housing 100-n located at the rearmost side. That is, by applying a tensile force to the stranded wire 321 having the tip fixed to the first housing 100-1 with the traction jack 320, the n-th housing 100-n is pulled forward and moved. In this way, the traction for the n-th enclosure 100-n is made by using the body 100 located in the front as the reaction force, as opposed to using the housing 100 located in the rear as the reaction force. . Therefore, in the present invention, there is no need for a separate reaction force for propulsion and traction.

d) removing the propulsion jack 310 between each of the housings 100 and making the remaining housings 100 with the exception of the housing 100 located in the rearmost close contact (FIG. 12);

When the first housing 100-1 reaches the planned position by repeating the propulsion and traction of the housing 100 according to step c) according to the repeated advance of the tip excavator 200, the tip excavator 200 Remove the propulsion jack 310 between the first housing (100-1) and the second housing (100-2) together with.

With the removal of the propulsion jack 310, the second housing 100-2 can be brought into close contact with the first housing 100-1, and the second housing 100-2 is equipped with a propelling jack 310 installed at the rear of the bar. The second housing (100-2) is pushed in close contact with the first housing (100-1). Prior to this, by installing the water stop plate 322 between the first and second housings 100-1 and 100-2, it is possible to have high watertightness at the joint of the first and second housings 100-1 and 100-2. In addition, by filling the gap 103 between the airtight steel plate 121 and the upper surface of the housing 100 before the pushing of the second housing 100-2 for the close contact with the Gunbi-Bim mortar 142, a high Structural rigidity can be achieved. The dry bibim mortar 142 is cured over time while maintaining the filling state without flowing into the housing 100 during the propulsion process of the second housing 100-2 to reinforce the joint connection between the housing 100 and In addition, there should be no gaps between the excavation surfaces.

The above-described installation of the water stop plate 322 and the filling of the dry bibim mortar 142 are also applied between the remaining individual housings 100 as they are.

e) after attaching the rearmost housing 100 to the front housing 100 using the traction jack 320, removing the traction jack 320 (FIG. 13);

Except for the n-th housing (100-n) located in the rearmost front all the housing 100 is in close contact with each other by the propulsion jack (310). Of course, the n-th enclosure 100-n can also be closely attached to the front enclosure 100 using the propulsion jack 310, but in this case, a separate reaction arm is required.

Therefore, in the present invention, the reaction force is unnecessary by pulling the n-th enclosure 100-n using the traction jack 320 .

When the n-th housing 100-n is in close contact with the housing 100 in front of it, the traction jack 320 is removed, and the rear end of the strand 321 is fixed to the n-th housing 100-n, so that the strand 321 is ) to have a high structural integrity of each housing 100 by.

The present invention prevents the fluid such as the grout material 143 and the bentonite liquid 144 sprayed into the ground from leaking into the working space inside the housing 100 by using the airtight steel plate 121, and these means are conventional As in the case of using the protective tube 400 as in the art, it can be applied as it is.

For example, as shown in FIG. 14 , an airtight steel plate 221 is installed at the rear of the tip excavation body 200 , and the protective pipe 400 is provided with a configuration corresponding to the second surface part 130 of the present invention, and between them It may be applied as a method of injecting the lubricating index liquid 141 into the gap 103 .

In the process of each step of the tunnel construction method of the present invention, the installation of the guiding pit 600 was not specifically described, but even in the present invention, the guiding pit 600 may be further installed within the working section where the tunnel is constructed. can The pigtail 600 is a means for preventing the housing 100 from being twisted and maintaining the horizontality while guiding the moving direction of the housing 100 , and is pre-constructed before the housing 100 enters the ground.

15 is a view showing each embodiment of the structure of the guiding pit 600 described above.

A pedestal 620 is installed on the bottom surface of the dog shaft 600 to support the housing 100 , and a height adjustment bar 610 for leveling the housing 100 is installed on the upper part if necessary. The height adjustment bar 610 and the pedestal 620 are made of concrete or steel frame, and although not shown, if the ground is soft, means for reinforcing the soft ground, such as a support pile, are further provided below the pedestal 620 when the ground is soft. can be

Rails 611 or rollers 612 may be further installed on the pedestal 620 or the height adjustment bar 610 to facilitate movement of the housing 100 . Fig. 15 (a) shows a case in which the rail 611 is installed and a case in which the roller 612 of Fig. 15 is installed.

Unexplained reference numeral 265 is a supply pipe for supplying a fluid such as the bentonite liquid 144 to the injection hole 264 .

In the above, the present invention has been described in detail with reference to specific embodiments, but the embodiments are merely examples for easy understanding of the present invention. It is self-evident that it can be implemented with various modifications within. Accordingly, such modifications will be said to fall within the scope of the present invention as described in the claims.

100; enclosure 101; strand insertion groove
102; spacer 103; gap between
110; body 111; 1st step
112; second step 120; first side
121,221,261; Airtight steel plates 121a, 221a, 261a; accommodation space
122,222,262; Elastic airtight material 122a; face material
122b; wire rod 123,223,263; hinge protrusion
124; infusion tube 124a; fixed tube
124b; separation tube 124b 130; 2nd side
141; lubricating index fluid 142; Gun Bibim Mortar
143; grout material 144; bentonite solution
200; tip excavator 210; press fit shoe
220,260; support beam 250; shoe propellant
264; blaster 265; supply pipe
310; propulsion jack 320; tow jack
321; strand 322; index plate
400; Sheriff 500; earth wall
510; membrane member 600; dog gang
610; height bar 611; rail
612; roller 620; Pedestal

Claims (16)

As prefabricated for building a tunnel,
The body part 110 located in the center, the first surface part 120 extending from one end of the body part 110 and configured integrally, and the second part extending from the other end of the body part 110 and configured integrally with the body part 110 . Consists of a face 130,
A first step 111 is formed between the body portion 110 and the first surface portion 120, and a second step 112 is formed between the body portion 110 and the second surface portion 130, The airtight steel plate 121 protruding to the outside is installed on the first surface part 120,
On the inner surface of the airtight steel plate 121, a hinge protrusion 123 is formed to protrude and an injection pipe 124 is installed,
A second step ( 112) is formed by the sum of the length (a) of the first step (111) and the height (h) of the hinge protrusion (123),
The injection pipe 124 is configured to extend to the first surface portion 120 so as to inject the lubricating index solution 141 into the gap 103, and is installed so that at least a part of it can be removed. building ship. The method of claim 1,
The length of the airtight steel plate (121) protruding from the first surface portion (120) is equal to the length of the second surface portion (130) or smaller than the length of the second surface portion (130). The method of claim 1,
At least a portion of the inner surface of the airtight steel plate (121) for tunnel construction, characterized in that the elastic sealing material (122) is attached. 4. The method of claim 3,
The elastic airtight accommodating member 122 is a tunnel construction enclosure, characterized in that it has a structure in which a plurality of face members 122a are installed to cross forward and backward. delete According to claim 1,
Tunnel construction, characterized in that the elastic sealing material 122 is attached to the outer direction of the hinge protrusion (123). delete delete delete A method of constructing a tunnel using the enclosure 100 according to any one of claims 1 to 4 and 6,
a) disposing a tip excavation body 200 and a plurality of enclosures 100 for underground excavation;
b) adjusting the forward direction of the tip excavation body 200, and then using the propulsion jack 310 installed at the rear thereof to enter it into the ground and perform excavation;
c) After adjusting the forward direction of the first housing 100-1 located at the forefront, propel the housing 100-1 with the propulsion jack 310 installed at its rear to enter the ground, and in the same way to the rearmost position. After making all the propulsion for the rest of the housing 100 except for the located n-th housing 100-n, the n-th housing 100-n is towed using a traction jack 320 installed at its rear. step;
d) When the first housing 100-1 reaches the planned position by repeating step c), it is located between the first housing 100-1 and the second housing 100-2 together with the tip excavation body 200. After removing the propulsion jack 310 of the second housing 100-2, the second housing 100-2 is propelled by the propelling jack 310 at the rear to make the second housing 100-2 in close contact with the first housing 100-1, and the same While removing the remaining propulsion jack 310 in this way, the remaining enclosures 100 except for the n-th enclosure (100-n) in close contact with the enclosure 100 in front thereof;
e) using the traction jack 320 to attach the n-th housing 100-n to the housing 100 in front of it, and then removing the traction jack 320; construction method. 11. The method of claim 10,
The tip excavator 200 includes a press-fit shoe 210 located at the tip and a shoe propelling body 250 for propelling the press-fit shoe 210, and the shoe propelling body 250 has an injection hole communicating with the outside. (264) is a construction method of a tunnel, characterized in that it is installed. 12. The method of claim 11,
Before advancing the tip excavation body 200 in step b), an elastic material barrier member 510 is installed on the earth wall 500 around the excavation target surface to protrude toward the excavation target surface, and the tip excavation body 500 A tunnel construction method, characterized in that it seals between the excavation surface and the top surface of the tip excavation body 200 while the end surface of the barrier member 510 is attached to the front end surface when moving forward. 12. The method of claim 11,
The excavation and advancement of the tip excavation body 200 in step b) are carried out while spraying the bentonite solution into the underground soil through the injection hole 264. A tunnel construction method, characterized in that. 11. The method of claim 10,
The propulsion and traction in step c) is a tunnel construction method, characterized in that after the lubricating index fluid 141 is injected into the gap 103 between the airtight steel plate 121 and the upper surface of the housing 100. 11. The method of claim 10,
The method of constructing a tunnel, characterized in that the close contact in steps d) and e) is performed after the water stop plate 322 is installed between the respective enclosures (100). 11. The method of claim 10,
Tunnel construction method, characterized in that the adhesion in steps d) and e) is made after the mortar 142 is filled in the gap 103 between the airtight steel plate 121 and the upper surface of the housing 100 .

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