KR102310091B1 - Underground structure installation method that does not require the installation of temporary pillars - Google Patents

Abstract

The present invention relates to a construction method for installing an underground structure not requiring installation of a temporary column, which can significantly reduce a construction period. The construction method of the present invention comprises the steps of: forming an upper slab structure (1000); forming a sidewall structure (2000); forming a floor structure (3000); constructing a tunnel structure; forming an upper slab (1100) and a sidewall (2100); and forming a tunnel floor surface (3100).

Description

Underground structure installation method that does not require the installation of temporary pillars

The present invention relates to an underground structure installation method that does not require the installation of temporary columns, and more particularly, a minimum large-diameter steel pipe is press-fitted at a predetermined position along a tunnel construction surface, and waterproof iron plates are left and right on the upper or side surfaces of these large-diameter steel pipes. The welding-installed small-diameter steel pipe and the small-diameter steel pipe equipped with the connector to which the waterproof steel plate is coupled are press-fitted so that they are connected to each other to form an upper loop or a side loop, and then the inside, that is, the tunnel part, is excavated in a special way to make the large-diameter steel pipes. By allowing them to be connected and at the same time to build a rigid structure that can perfectly support the small-diameter steel pipes forming the upper and side loops,

As it is not necessary to install a large number of temporary pillars to support the horizontal support beams inside the tunnel as in the prior art, there is no need to purchase temporary pillars, equipment and other connecting materials necessary for their installation, and a lot of manpower required to install the temporary pillars. Economical construction is possible because there is no waste of time and

Since there is no installation of a temporary pole, the work is not affected at all, so the work can be done very easily and quickly, which can greatly shorten the construction period.

In addition, since a small-diameter steel pipe welded with a waterproof steel plate is used, the amount of welding work is small during waterproofing work, so the waterproofing work is very quick and waterproofing is done perfectly It's about engineering.

In general, as a method of constructing a structure underground, there is a structure construction method by excavation and non-excavation. When it is necessary to cross the lower part of an existing road or railway to install a sewer rock, an underpass, or a tunnel structure, the non-opening method is required because it is difficult to relocate the obstacles due to the construction, or it is impossible to open the construction due to interference with obstacles or obstacles in vehicle communication. However, in the construction method of structures by non-interleaving, it is essential to have a forward base and a reach base in the concept of a work area on both sides of a road or obstacles crossing. can be heard

The double hull towing method is a method of horizontally press-fitting a temporary steel pipe for housing support of about 600 mm from the advancing base to the reaching base in the underground through which the hull will pass, and then crossing the underground from the reaching base on the opposite side of the hull to be towed. It is a construction method in which the PC steel wire of PC is bound with the box manufactured on site, then towed to remove the internal soil inside the enclosure, and the same towing and excavation work is repeated to install the structure in the ground. With this construction method, there is a risk of subsidence on the road or obstacles on the upper part of the hull due to the propulsion load of the hull or the gap between the propulsion hull and the temporary steel pipe installed underground. If the scale of the tractor increases, there are restrictions on traction, and since the size of the workshop is rather large, it is difficult to work in a deep underground space.

In addition, if the processing of the connection part between the enclosures is insufficient, there is a risk that water leakage may occur.

Therefore, due to the disadvantages of the hull towing method, the steel pipe loop method is often applied as a non-interleaved underground structure construction method.

1 to 5 of Patent Registration No. 10-0562158 with respect to the conventional non-interlaced steel pipe loop method.

In the conventional steel pipe loop method, the steel pipe (1) is sequentially press-fitted and connected in advance in the ground where the structure is to be formed, to form a steel pipe loop, and the inside of the steel pipe loop, i.e., the tunnel forming part, is removed and the structure is built. As shown in 1, in order to support the steel pipes (1) to withstand the upper load or side load generated during excavation, it is supported by a plurality of lateral support beams and temporary support such as temporary columns (5).

The construction process of the steel pipe loop is explained as follows. First, in consideration of the size of the sphere to be created at the outpost, horizontally press-fit a steel pipe (1) for temporary construction of about 600-800 mm into the outer surface of the sphere, and pour concrete in the steel pipe to form a steel pipe loop (see Fig. 2).

Then, the inside of the roof where the structure will be built is excavated from the outpost. The excavation is carried out step by step downward from the roof steel pipe section of the upper floor in consideration of safety against upper load and lateral pressure. The first excavation is to excavate the lower surface of the steel pipe loop to a depth of about 3 m. Since the concrete has been poured, the transverse support beams (4) are installed on the lower and side surfaces of the steel pipe loop at right angles to the steel pipe (1) with H-shaped steel, and supported by a number of temporary columns (5) to carry the load over the entire section. should be supported (see FIG. 3). In other words, the existing steel pipe loop is a concave-convex connection structure in which a pair of L-shaped rings (2) and T-shaped clasps (3) are attached to the central part of the side of the steel pipe (1). This was only a concept to prevent displacement of the steel pipe from the position rather than to bear the load.

Therefore, since there was a serious problem that transverse rigidity could not be secured between the connection parts of the steel pipe loop, transverse support beams 4 and a larger number of temporary columns 5 should be installed accordingly, and support beams 4 There was a problem in that the scale of the temporary facilities increased because the structures had to be installed as far apart as possible.

Then, while excavating in the second and third rounds, carefully extend the already installed temporary pillars 5 downwards (5', 5") to complete the excavation of the internal soil to the installation depth of the structure (see FIGS. 4 and 5) ), finally installing reinforcement and formwork for the upper slab 60, the wall 65, and the lower tunnel floor 80, etc., and pouring concrete to complete the construction of the underground structure as shown in FIG. 5 did.

However, since the conventional steel pipe loop method has a serious problem in that it cannot secure lateral rigidity between the connection parts of the steel pipe loop as described above, the transverse support beams 4 and a larger number of temporary columns 5, that is, It was not economical due to problems such as requiring a lot of equipment and auxiliary materials, as well as a lot of manpower and time, when installing the temporary facility because it had to be installed.

Also, after excavating an already installed temporary column, the risk of subsidence during construction is very high due to the problem of having to extend downward to the installation depth is delayed

In addition, since the temporary pillar (5), that is, the temporary support support is cut and embedded in the concrete structure, the cut surface is exposed to the outside and corrosion occurs, as well as the gap between the temporary support support made of steel and the concrete, resulting in water leakage. There were many difficulties in maintenance due to such problems.

In addition, as a conventional underground structure installation method, it is disclosed in Korean Patent Registration No. 10-0505301 and Patent Registration No. 10-1069705, which is a pre-registered inventor.

However, among these conventional inventions, the method described in Patent Registration No. 10-0505301 generally uses a large-diameter steel pipe with a diameter of 2,000 mm to 3,000 mm, and the diameter and thickness of the steel pipe are thick, resulting in high material costs, transportation costs, and installation costs. Excavation and soil transport are very large.

Also, looking at the steel pipe connection process that connects the steel pipe to the steel pipe in the process, the steel pipe side wall is cut at regular intervals to withstand the earth pressure in the steel pipe, leaving a part of the steel pipe partially left, and the upper and lower sides of the cut incision are respectively cut After connecting the waterproof steel plate for earth pressure bearing and the lower iron plate to each other by welding, etc., and installing the earth pressure support to support the upper and lower earth pressure, cut the remaining part again and attach the waterproof iron plate and the lower iron plate to the incision in the same way as above. By installing, the waterproof steel plate and the lower steel plate were continuously installed to connect the left and right steel pipes to each other.

This method of connecting iron plates takes a lot of construction time due to partial cuts and repetitions of installation, which causes a problem in that the construction cost increases due to the extension of the construction period. There was a frequent problem of loss of earth pressure in the construction process, such as excavating

That is, after excavating the inside of the steel pipe, the side is cut, the soil between the steel pipes is excavated and removed, and then a waterproof iron plate must be attached to the upper side of the cut surface, so it is impossible to prevent soil leakage. After welding in close contact with the cut surface, lifting another heavy waterproof steel plate and connecting by welding must be repeated dozens of times depending on the length of the steel pipe and in some cases hundreds of times, so the operation is very difficult and time consuming. There were also many safety issues.

And in order to solve the problem of stability, after welding the waterproof steel plate, after welding the lower steel plate inside the steel pipe, a large number of earth pressure supports must be vertically attached between them. It was difficult and time consuming, and of course, settlement could occur at this time.

The present invention has been devised in consideration of the various problems of the prior art, and it is economical and the work is very simple and quick because it does not require any installation of temporary facilities such as temporary columns, so that the construction period can be significantly reduced. , a very innovative underground structure installation method that does not require the installation of temporary poles, which enables safe construction even without the need for installation of temporary materials, and is structurally very safe as it is perfect for waterproofing. Its purpose is to provide

The underground structure installation method of the present invention that does not require the installation of a temporary pole to achieve the object described in the above-mentioned problem is basically a tunnel using a hydraulic jack and a propulsion auxiliary pipe with a number of large-diameter steel pipes having a predetermined length and large diameters. Press-fit while horizontally pasting the construction surface for a long time.

Selectively press-fit large-diameter steel pipes on both sides of the upper part and excavate and remove internal soil → Small-diameter steel pipes with connection grooves are intermittently press-fitted so that a loop is formed horizontally on the outside between the upper and both sides of the large-diameter steel pipes. A small-diameter steel pipe having a waterproof steel plate with a separation prevention part formed at the tip between the steel pipes is press-fitted, and the tip of the waterproof steel plate is inserted into the connection groove so that the small-diameter steel pipes are closely connected to each other by the waterproof iron plate, → Partially excavate the lower part of the connected small-diameter steel pipe to a predetermined height and depth to secure the upper working space, → make some incisions with a predetermined depth on opposite sides of both large-diameter steel pipes, and install H-beam support beams in the cutouts. , After fixing both ends of the support beam on the upper surface of the support beam made of H-beam, install the connecting support to support the small-diameter steel pipes with the top surface of the support beam. An upper slab structure forming step (S100-1) to make the upper waterproofing completely by welding;

Press-fit the lower large-diameter steel pipe to the lower side of the upper large-diameter steel pipe, and excavate and remove the internal soil and soil → Sparsely space the small-diameter steel pipe with the connection groove so that a loop is formed on the outside between the upper both large-diameter large-diameter steel pipe and the lower large-diameter steel pipe Press-fitting and press-fitting a small-diameter steel pipe having a waterproof steel plate having a break-out prevention part formed at the tip between these small-diameter steel pipes, inserting the tip of the waterproofing iron plate into the connection groove so that the small-diameter steel pipes are closely connected to each other by the waterproof iron plate Well, → Partially excavated the left inside of the tunnel part of the small diameter steel pipe closely connected to a predetermined depth to secure the side work space → Form a partial incision at a predetermined depth on the upper surface of the lower large diameter steel pipe and make an H-beam in the cutout Install a vertical column, but install a vertical column that connects the lower large-diameter steel pipe from the bottom of the support beam supporting beam, weld the waterproof steel plate, and weld the upper and lower large-diameter steel pipe and adjacent small-diameter steel pipe to waterproof the side part Forming a side wall structure on the left side by making it perfect and forming a side wall structure on the right side in the same way (S100-2);

After securing the upper working space to form the upper slab structure, securing the left and right working spaces to form the left and right side wall structures, excavate the lower part of the remaining tunnel to secure the lower working space, and then secure the lower inner surface of the lower large-diameter steel pipes. The bottom structure forming step ( After performing S100-3),

After that, excavating the upper part to a predetermined depth again to secure an upper working space and installing the next upper support beam on the upper part;

The work of excavating the left and right sides to secure the left and right working spaces to a predetermined depth and installing the left and right vertical columns vertically at both ends of the next upper support beam;

To secure the upper working space and the left and right working spaces, excavate the remaining unexcavated lower part of the tunnel and secure the lower working space. (S100) The step of constructing a tunnel structure with a solid structure to withstand upper and lateral pressure by installing a rectangular support frame made of H-beam obtained by sequentially and successively connecting with a STRUT with a predetermined width to the end of a large-diameter steel pipe (S100) -4) and;

The steps of installing formwork on the upper side and both sides of the tunnel part, first reinforcing the inside, then pouring concrete and curing it, then removing the formwork to form the upper slab and side walls (S100-5);

It is characterized in that it is made including the step (S100-6) of forming the tunnel floor by placing reinforcing bars on the lower side of the tunnel and then pouring concrete.

The underground structure installation method of the present invention, which does not require the installation of temporary columns, uses a smaller number of large-diameter steel pipes than the existing underground structure-forming method, as well as small-diameter waterproof steel plates welded on both sides when connecting small-diameter steel pipes. Since it uses a steel pipe, it also requires a minimum small-diameter steel pipe, so the material cost and transportation cost are reduced while the press-fitting of the steel pipes is quickly performed,

In addition to the advantage that the work of constructing the upper slab structure and the side wall structure by closely connecting small-diameter steel pipes to each other is also performed very quickly,

There is an advantage in that waterproofing work is done very quickly and completely while the waterproofing work is done very quickly because the welding work area is small as the waterproof iron plates are welded and installed on both sides of the small-diameter steel pipe in advance.

On the other hand, what is most characteristic above all is that the present invention does not excavate the entire tunnel part at once, but excavates the lower part of the small-diameter steel pipe closely connected to each other to a predetermined height and depth to secure an upper working space, and through this, the large-diameter steel pipes on both sides are Install support beams to connect

After that, instead of excavating the entire lower part of the upper working space at once, excavating the left side only to a predetermined depth to secure the left working space, and then connecting and installing the left vertical column at the left end of the support beam,

Similarly, through the right working space secured by excavating the right side only to a predetermined depth, the right vertical column is connected and installed at the right end of the support beam,

To secure the upper working space and the left and right working spaces, excavate the remaining unexcavated lower part of the tunnel part to secure the lower working space, and strut the lower ends of the left and right vertical columns vertically connected to both ends of the upper support beam. A method of constructing a tunnel structure with a solid structure to withstand upper and lateral pressure by installing a rectangular support frame made of H-beam obtained by sequentially and successively connecting and installing a STRUT with a predetermined width to the end of a large-diameter steel pipe. As it is being adopted,

In order to install an underground structure using the conventional steel pipe loop method, a plurality of transverse support beams installed to support the steel pipes in order to withstand the upper load or lateral load generated during the excavation of the inner side of the steel pipe loop, that is, the tunnel part. Although a larger number of temporary columns should be installed than the directional support beams, in the present invention, since the square support frames made of H-beams connecting and supporting large-diameter steel pipes and small-diameter steel pipes withstand upper and lateral loads, a Since there is no need to install temporary poles at all, there is no need to separately purchase a number of temporary poles, equipment and other connecting materials necessary for their installation, and it is very economical because there is no waste of a lot of manpower and time required for installing temporary poles. There is an advantage.

In addition, in the conventional case, the concern of subsidence during construction is very high due to the problem of having to extend downward to the installation depth after excavating a number of temporary poles that have already been installed. There was a disadvantage that the construction speed was slowed down due to the problems that came, but in the present invention, there is no installation of a temporary pole inside the tunnel part, so there is no interference in the work at all, so the work is very simple and quick, and the construction period can be greatly reduced. There are also advantages.

In addition, in the conventional case, since the upper part of a plurality of temporary columns is cut and embedded in the concrete structure, the cut surface is exposed to the outside and corrosion occurs, as well as the gap between the temporary column made of steel and the concrete, causing water leakage, etc. There were many difficulties in maintenance due to the problem, but in the present invention, there is no temporary pillar at all, so there is no concern about the occurrence of such a problem, and maintenance is also very convenient.

As a result, the present invention does not require the installation of a separate temporary pole at all, so it is economical, and the operation is very simple and quick, so that the construction period can be significantly reduced. It is clear that it is a very innovative invention that can construct an underground structure that is structurally very safe because waterproof work is easy and waterproof is perfect, faster and safer than any other existing construction methods.

1 is a general view for explaining the existing non-interleaved structure construction method.
2 to 5 are cross-sectional views for explaining the construction sequence of the existing steel pipe loop method.
6A to 6B are views showing various aspects of an underground structure constructed by various embodiments of the method for installing an underground structure that does not require the installation of a temporary pole of the present invention.
7 to 26 are views for explaining the construction sequence of the underground structure constructed by various embodiments of the present invention,
7 to 18 are views for explaining a state of constructing an underground structure in a rectangular shape.
19 to 26 are views for explaining a state of constructing an underground structure in an arcuate shape.

Hereinafter, one embodiment of the present invention for achieving the object described in the problem to be solved will be described in detail with reference to the accompanying drawings. It should be understood that one embodiment described below is illustratively shown to help the understanding of the present invention, and the present invention may be implemented with various modifications different from the one embodiment described herein. However, in the description of the present invention, if it is determined that a detailed description of a related known function or component may unnecessarily obscure the gist of the present invention, the detailed description and detailed illustration thereof will be omitted. In addition, the accompanying drawings are not drawn to scale in order to help understanding of the invention, but dimensions of some components may be exaggerated.

6a to 6e are views showing various aspects of the underground structure to be built according to an embodiment of the present invention,

6a is a view showing an underground structure built in a rectangular shape without an existing structure serving as a slab on the upper part, and FIG. 6b is another large-diameter steel pipe selectively between large-diameter steel pipes when the formation width of the upper slab should be wide It is a drawing showing a state in which a vertical column is further installed along with press-fitting. And Fig. 6c is a view showing an underground structure constructed in an arcuate shape without an existing structure, Fig. 6d is a view of an underground structure constructed when there is an existing structure serving as a slab on the upper part, and Fig. 6e is, in particular, of the side wall structure It is a diagram showing another configuration example.

Hereinafter, an installation method for constructing an underground structure of the present invention without the need to install a temporary pole will be described with reference to the drawings.

<Example 1>

Embodiment 1 of the present invention relates to an underground structure installation method corresponding to the case where there is no existing structure serving as a slab on the upper portion as shown in the accompanying drawings Figs. In the case where the formation width is to be constructed widely, another large-diameter steel pipe 100 is selectively press-fitted between the large-diameter steel pipes 100 and a vertical column 410 is further installed later, which is the same as the underground structure installation method of FIG. 6a. Since they are substantially the same in terms of their configuration and effects, a description thereof will be omitted.

In Embodiment 1 of the present invention, the step (S100-1) of forming the upper slab structure 1000 should be performed first. As shown in FIG. 7, a plurality of large-diameter steel pipes 100 having a predetermined length and having a large diameter are used with a hydraulic jack. And using a propulsion auxiliary pipe, press-fit while horizontally long and pasted on the tunnel construction surface,

Optionally, press-fit the large-diameter steel pipe 100 on both sides of the upper part and excavate and remove the internal soil.

Then, as shown in FIG. 8, the small-diameter steel pipe 210 having the connector 211 with the connection groove 211a formed therein is sparsely press-fitted so that a loop is formed horizontally on the outside between the upper both sides of the large-diameter steel pipe 100, and , a small-diameter steel pipe 220 having a waterproof iron plate 221 having a separation prevention portion 221a formed at the tip between these small-diameter steel pipes 210 is press-fitted, and the tip of the waterproof iron plate 221 is connected to a connecting groove 211a ) so that the small-diameter steel pipes 210 and 220 are closely connected to each other by the waterproof iron plate 221 .

In this way, a small number of small-diameter steel pipes 210 and 220 can be used, which is economical, and the connection of the small-diameter steel pipes 210 and 220 is made very quickly, as well as the separation formed at the tip of the waterproof iron plate 221 . Since the prevention part 221a cannot come out from the connection groove 211a of the connector 211, the coupling state is also very strong.

Then, as shown in FIG. 9, the lower portions of the small-diameter steel pipes 210 and 220 closely connected to each other are partially excavated to a predetermined height and depth to secure the upper working space 10a, and both sides of the large-diameter steel pipes 100 Partial cutouts 110 are formed on opposite sides to a predetermined depth, respectively, and support beams 310 made of H-beams are installed in the cutouts 110. (400) After being fixed on the upper surface, the connecting support 311 is installed to support the small-diameter steel pipes 210 and 220 with the upper surface of the support beam 310, and the waterproof iron plate 221 is welded and the large-diameter steel pipe ( 100) and the adjacent small-diameter steel pipe 210 are welded.

In this way, instead of excavating the entire tunnel at once, the lower portions of the small-diameter steel pipes 210 and 220 closely connected to each other are first excavated only at a predetermined height and depth to secure the upper working space 10a, and large-diameter steel pipes on both sides ( Since the first support beam 310 is installed so that 100) is connected, the support beam 310 can be installed horizontally safely and quickly, of course,

Both ends of the support beam 310 are firmly supported by the support beam support 400 inside the large diameter steel pipe 100 on both sides, and the connection support 311 installed on the upper surface of the support beam 310 is a small diameter steel pipe 210 ) (220) will be safely supported.

Then, as shown in FIG. 10, the upper waterproofing operation of welding the waterproof iron plate 221 coupled to the connector 211 at the same time as the above operation and welding the small-diameter steel pipe 210 adjacent to the large-diameter steel pipe 100 at the same time At this time, since the waterproof iron plates 221 are pre-welded and installed on both sides of the small-diameter steel pipe 220, the welding work site is small, so the waterproofing work is done very quickly.

After forming the upper slab structure 1000 as described above, the step (S100-2) of forming the sidewall structure 2000 on the left and right lower ends of the upper slab structure 1000 should be performed (S100-2), first shown in FIG. As described above, the lower large-diameter steel pipe 100 is press-fitted to the lower side of the upper large-diameter steel pipe 100, and internal soil is excavated and removed.

Then, as shown in FIG. 12, a small-diameter steel pipe 210 having a connector 211 in which a connecting groove 211a is formed so that a loop is formed vertically on the outside between the upper large-diameter steel pipe 100 and the lower large-diameter steel pipe 100'. ), and a small-diameter steel pipe 220 having a waterproof iron plate 221 having a separation prevention part 221a formed at the tip between these small-diameter steel pipes 210 is press-fitted, The tip is inserted into the connection groove 211a so that the small-diameter steel pipes 210 and 220 are closely connected to each other by the waterproof iron plate 221 .

In this way, it is also economical to use a small number of small-diameter steel pipes 210 and 220, and the small-diameter steel pipes 210 and 220 are connected very quickly, as well as at the tip of the waterproof iron plate 221. Since the formed separation prevention part 221a cannot come out from the connection groove 211a of the connector 211, the coupling state is also very strong.

Then, as shown in FIG. 13, the left inside of the tunnel part 11 of the small-diameter steel pipes 210 and 220 closely connected to each other is partially excavated to a predetermined depth to secure the left working space 10b, and then the lower large-diameter A partial cut-out 110 is formed on the upper surface of the steel pipe 100 to a predetermined depth, and a vertical column 410 made of an H-beam is installed in the cut-out 110, but a support beam support for supporting the first support beam 310 ( 400) Connect the lower large-diameter steel pipe 100' from the bottom, install the first vertical column 410 on the left, weld the waterproof iron plate 221, and adjacent to the upper and lower large-diameter steel pipes 100 and 100' The side wall structure 2000 is formed on the left side by performing a waterproof operation of welding the small-diameter steel pipe 210 to the left side.

Then, as shown in FIG. 14, by performing the same operation as the method of forming the side wall structure 2000 on the left side, the right side is excavated to a predetermined depth to secure the right working space 10c, and then the first support beam 310 is also on the right side. ), connect the lower large-diameter steel pipe 100' from the bottom of the support beam support 400 supporting the The side wall structure 2000 is also formed on the right side by performing a waterproof operation of welding the small-diameter steel pipe 210 adjacent to 100 and 100 ′.

When the step (S100-2) of forming the sidewall structure 2000 on both the left and right sides is performed, in order to form the sidewall structure 2000, this is also the lower part of the upper working space 10a already formed in the previous step. Instead of excavating the entirety at once, excavating only the left side by a predetermined depth to secure the left working space 10b, and then connecting and installing the left first vertical column 410 to the left end of the first support beam 310. The work of installing the first vertical column 410 is done very safely and quickly, as well as connecting and installing the first vertical column 410 to the right end of the first support beam 310 through the secured right working space 10c. The work is also done very safely and quickly.

After performing the step (S100-2) of forming the side wall structure 2000, as shown in FIG. 15, the upper working space 10a is secured in the previous steps to form the upper slab structure 1000 After forming the left and right side wall structures 2000 by securing the left and right working spaces 10b and 10c, excavating the lower part of the remaining tunnel 11 to secure the lower working space 10d, and then securing the lower large diameter The lower inner surfaces of the steel pipes 100 ′ are cut to form a cutout 110 , and a first strut 510 is installed, but the first left and right vertical sides are connected vertically to both ends of the first upper support beam 310 . The lower end of the pillar 410 is connected to the first strut 510 to form a floor structure 3000 forming a structurally strong rectangular support frame (S100-3).

Then, the operation of installing the next upper support beam 310 in the upper part by excavating the upper part again to a predetermined depth to secure the upper working space 10a,

Excavating the left and right sides to a predetermined depth again to secure the left and right working spaces 10b and 10c, and then installing the left and right vertical columns 410 at both ends of the next upper support beam 310 vertically;

After excavating to secure the upper working space 10a and the left and right working spaces 10b and 10c, the remaining unexcavated lower part of the tunnel 11 is excavated to a predetermined depth to secure the lower working space 10d, A rectangular support frame made of an H-beam obtained by sequentially and continuously connecting the lower ends of the left and right vertical columns 410 vertically connected to both ends of the upper support beam 310 with a strut 510. As shown in FIGS. 16A and 16B , the large-diameter steel pipes 100 and 100' are sparsely installed to the ends with a predetermined width to construct a tunnel structure having a strong structure to withstand upper and lateral pressure (S100-4). do.

Then, as shown in FIG. 17 , a formwork 600 is installed on the upper side and both sides of the tunnel unit 11, but first, reinforcing reinforcement is carried out inside, and then concrete is poured and cured, and then the formwork 600 is removed and the upper side A step (S100-5) of forming the slab 1100 and the sidewall 2100 is performed.

Then, as shown in FIG. 18 , reinforcement is placed on the lower side of the tunnel unit 11 , and then concrete is poured to form the tunnel bottom surface 3100 ( S100-6 ).

The present invention according to the first embodiment as described above uses a smaller number of large-diameter steel pipes 100 and 100 ′ than the existing underground structure forming method, as well as when connecting small-diameter steel pipes 210 and 220 . Since it uses a small-diameter steel pipe 220 having waterproof iron plates 221 welded on both sides, this also requires a minimum of small-diameter steel pipes 210 and 220, so that the press-fitting of the steel pipes is performed quickly while reducing material and transport costs. is basic,

The work of constructing the upper slab structure 1000 and the side wall structure 2000 by closely connecting the small-diameter steel pipes 210 and 220 to each other is also performed very quickly.

In addition, since the waterproof iron plate 221 is previously welded and installed on both sides of the small-diameter steel pipe 220, the number of welding parts is small, so that the waterproofing work is done very quickly and perfectly.

On the other hand, the most characteristic of all is that the present invention does not excavate the entire tunnel 11 at once, but excavates the lower portions of the small-diameter steel pipes 210 and 220 closely connected to each other to a predetermined height and depth, thereby excavating the upper working space ( 10a) is secured and the support beams 310 are installed so that the large-diameter steel pipes 100 on both sides are connected through this,

After that, instead of excavating the entire lower portion of the upper working space 10a at once, only the left side is excavated to a predetermined depth to secure the left working space 10b, and through this, the left vertical column 410 is connected to the left end of the support beam 310. After installing,

Similarly, the right vertical column 410 is connected and installed at the right end of the support beam 310 through the right working space 10c secured by excavating the right side only by a predetermined depth,

To secure the upper working space 10a and the left and right working spaces 10b and 10c, excavate the remaining unexcavated lower part of the tunnel 11 to secure the lower working space 10d and the upper support beam ( 310), a rectangular support frame made of H-beam obtained by sequentially and continuously connecting and installing the lower ends of the left and right vertical columns 410 connected to both ends with a strut 510 with a large diameter steel pipe ( 100) It adopts a method of constructing a tunnel structure with a solid structure to withstand upper and lateral pressure by installing it sparsely with a predetermined width until the end.

In order to install an underground structure using the conventional steel pipe loop method, a plurality of transverse support beams installed to support the steel pipes in order to withstand the upper load or lateral load generated during the excavation of the inner side of the steel pipe loop, that is, the tunnel part. A larger number of temporary columns should be installed than the directional support beams, but

In the present invention, since the rectangular support frames made of H-beams connecting and supporting the large-diameter steel pipes 100 and 100 ′ and the small-diameter steel pipes 210 and 220 bear the upper load or the side load, when excavating the tunnel 11 There is no need to separately install multiple temporary columns.

Therefore, it is very economical because there is no need to separately purchase a plurality of temporary poles and equipment and other connecting auxiliary materials required for their installation, and there is no waste of a lot of manpower and time required for installing the temporary poles.

In addition, in the conventional case, the concern of subsidence during construction is very high due to the problem of having to extend downward to the installation depth after excavating a number of temporary poles that have already been installed. There was a disadvantage that the construction speed was slowed down due to the problems that came, but in the present invention, there is no installation of a temporary pole inside the tunnel part, so there is no interference in the work at all, so the work is very simple and quick, and the construction period can be greatly reduced. have.

On the other hand, in the conventional case, since the upper part of a plurality of temporary columns is cut and embedded in the concrete structure, the cut surface is exposed to the outside and corrosion occurs, as well as the gap between the temporary column made of steel and the concrete, causing water leakage, etc. There were many difficulties in maintenance due to the problem of

As a result, the present invention according to Example 1 does not require the installation of a separate temporary pole at all, so it is economical, and the operation is very simple and quick, so that the construction period can be greatly reduced, as well as without the need for installing a temporary pole at all. Safe construction is possible, waterproof work is easy, and even waterproofing is perfect, so it is possible to construct a very safe underground structure faster and safer than any existing construction method.

<Example 2>

Embodiment 2 of the present invention relates to an underground structure installation method corresponding to the case where there is no existing structure serving as a slab on the upper part as shown in FIG. 6c,

First, as shown in FIG. 19, a number of large-diameter steel pipes having a predetermined length and having a large diameter are press-fitted while horizontally attaching them to the tunnel construction surface using a hydraulic jack and a propulsion auxiliary pipe,

When the tunnel construction surface is an arcuate (circular) construction surface, the large-diameter steel pipes 100 and 100 ′ are pushed in on both upper and lower sides along the arcuate construction surface, and the internal soil is excavated and removed.

Then, as shown in FIG. 20, a small-diameter steel pipe having a connector 211 in which a connecting groove 211a is formed so that an arcuate loop is formed on the left and right sides between the upper large-diameter steel pipe 100 and the lower both-side large-diameter steel pipe 100 210 is press-fitted intermittently, and a small-diameter steel pipe 220 having a waterproof iron plate 221 having a separation preventing portion 221a formed at the tip between these small-diameter steel pipes 210 is press-fitted, but the waterproof iron plate 221 ) is inserted into the connection groove 211a so that the small-diameter steel pipes 210 and 220 are closely connected to each other by the waterproof iron plate 221 .

At this time, the reason for press-fitting large-diameter steel pipes 100 and 100' in the upper center and both lower sides is that when the steel pipe is large-diameter, it is bulky and heavy, so it is difficult to transport. It is economical by minimizing the number of large-diameter steel pipes as it requires a lot of material and manufacturing costs, but also considers the convenience and safety of post-works and the structural robustness of the structure being built.

In this way, a small number of small-diameter steel pipes 210 and 220 can be used, which is economical, and the connection of the small-diameter steel pipes 210 and 220 is made very quickly, as well as the separation formed at the tip of the waterproof iron plate 221 . Since the prevention part 221a cannot come out from the connection groove 211a of the connector 211, the coupling state is also very strong.

Then, as shown in FIGS. 21 and 22, the left inside of the tunnel part of the small-diameter steel pipes 210 and 220 closely connected to each other is partially excavated to a predetermined depth to secure the left working space 10b, and the upper large-diameter steel pipe (100) A part of the cutout 110 is formed on the left side and the upper surface of the lower large-diameter steel pipe 100', and the H-beam support beam 310 is installed in the cutout 110 in an arcuate shape, but the support beam installed in an arcuate shape (310) The upper end is fixedly installed to be supported on the support beam support 400 installed in the upper large-diameter steel pipe 100, and the lower end of the support beam 310 is fixedly installed on the inner surface of the large-diameter steel pipe 100' on the lower left side, and then the support beam (310) Install the connection support 311 to support the small-diameter steel pipes 210 and 220 on the upper surface, weld the waterproof iron plate 221, and at the same time, the large-diameter steel pipes 100 and 100' on the upper and lower left sides and welding the adjacent small-diameter steel pipe 210 to form an arcuate structure on the left side.

Then, as shown in FIG. 23, the right inside of the tunnel part 11 of the small-diameter steel pipes 210 and 220 closely connected to each other in the same manner as shown in FIG. 23 is partially excavated to a predetermined depth to secure the right working space 10c. An arcuate structure is also formed on the right side.

When the step (S100-1) of forming the arcuate structure on the left and right sides is performed, the small-diameter steel pipe 210 closely connected to each other first, rather than excavating the entire tunnel 11 at once to form the arcuate structure. ) (220) first excavated to a predetermined depth to secure the left working space (10b), through which the upper large-diameter steel pipe 100 and the lower large-diameter steel pipe 100' are connected to the H-beam support beam 310 Since it is installed in an arcuate form, the work of installing the support beam 310 in an arcuate form is made very safely and quickly,

The upper end of the support beam 310 installed in an arcuate shape is fixedly installed to be supported by the support beam support 400 installed in the upper large-diameter steel pipe 100, and the lower end of the support beam 310 is the inner surface of the large-diameter steel pipe 100' on the lower left. Since it is fixedly installed on the support beam 310, the connection support 311 installed on the upper surface safely supports even the small-diameter steel pipes 210 and 220 press-fitted on the left side.

In addition, during the above operation, the waterproof steel plate 221 coupled to the connector 211 is welded at the same time, and at the same time, the large-diameter steel pipes 100 and 100 ′ on the upper and lower left sides and the small-diameter steel pipe 210 are welded. At this time, since the waterproof iron plates 221 are welded and installed on both sides of the small-diameter steel pipe 220 in advance, the number of welding parts is small, so the waterproofing work is done very quickly.

After performing the step (S200-2) of forming the arcuate structure on the left and right sides as described above, as shown in FIG. 24, the left working space is secured in the previous step to form the left arcuate structure and the right working space After securing (10c) to form the right arcuate structure, excavate the remaining unexcavated lower part of the tunnel part 11 to secure the lower working space 10d, and then cut the lower inner surfaces of the lower large-diameter steel pipes 100' Forming the cutout 110 and installing the strut 510, but connecting and installing the lower end of the arch support beam 310 to form a structurally strong arch support frame (3000) forming step (S200- 2) is performed.

Then, thereafter, the operation of installing the next arcuate support beam 310 on the left side by excavating the left side to a predetermined depth again to secure the left working space 10b,

The operation of excavating the right side to a predetermined depth again to secure the right working space (10c) and installing the next arcuate support beam 310 on the right side;

Excavated again to secure the left and right working spaces 10b and 10c, and excavated the remaining unexcavated lower part of the tunnel 11 to secure the lower working space 10d to secure the lower part of the lower large-diameter steel pipe 100'. An arcuate support frame made of structurally strong H-beam obtained by sequentially and continuously performing the operation of forming the cutout 110 by cutting the inner surface and connecting the lower end of the arcuate support beam 310 with a strut 510. A step (S200-3) of constructing a tunnel structure having a solid structure to withstand upper pressure and lateral pressure by sparsely installing the large-diameter steel pipes (100) (100') with a predetermined width to the ends (S200-3);

As shown in FIG. 25, the formwork 600 is installed on the upper side and both sides of the tunnel part 11, but first, reinforcement is placed inside, and then concrete is poured and cured. 1100) and forming (S300-4);

As shown in FIG. 26 , a step (S200-5) of forming a tunnel bottom surface 3100 by pouring concrete after reinforcing reinforcement on the lower side of the tunnel part 11 is performed.

The present invention according to the second embodiment as described above uses a smaller number of large-diameter steel pipes 100 and 100 ′ than that of the existing underground structure forming method, as well as small-diameter steel pipes 210 and 220, as in the first embodiment. In the connection work of the steel pipe, the small-diameter steel pipe 220 with the waterproof iron plates 221 welded on both sides is used. It is basic that is done quickly,

The work of constructing an arcuate structure by closely connecting the small-diameter steel pipes 210 and 220 to each other is also performed very quickly.

In addition, since the waterproof iron plate 221 is previously welded and installed on both sides of the small-diameter steel pipe 220, the number of welding parts is small, so that the waterproofing work is done very quickly and perfectly.

On the other hand, the most characteristic of all is that the second embodiment of the present invention also does not excavate the entire tunnel 11 at once,

First, the left side of the tunnel 11 is excavated to a predetermined depth to secure the left working space 10b, and through this, the arcuate support beam 310 is installed on the right side,

Similarly, the right side of the tunnel part 11 is excavated to a predetermined depth to secure the right working space 10c, and through this, the arcuate support beam 310 is installed on the right side,

Excavated again to secure the left and right working spaces 10b and 10c, and excavated the remaining unexcavated lower part of the tunnel 11 to secure the lower working space 10d to secure the lower part of the lower large-diameter steel pipe 100'. An arcuate support frame made of a structurally strong H-beam obtained by sequentially and continuously performing the operation of forming the cutout 110 by cutting the inner surface and connecting the lower end of the arcuate support beam 310 with a strut 510. It adopts a method of constructing a tunnel structure with a strong structure that withstands upper and lateral pressure by installing sparsely to the end of the large-diameter steel pipe 100 with a predetermined width,

In order to install an underground structure using the conventional steel pipe loop method, a plurality of transverse support beams installed to support the steel pipes in order to withstand the upper load or lateral load generated during the excavation of the inner side of the steel pipe loop, that is, the tunnel part. A larger number of temporary columns should be installed than the directional support beams, but

In the present invention, since the H-beam arcuate support frames connecting and supporting the large-diameter steel pipes 100 and 100' and the small-diameter steel pipes 210 and 220 withstand the upper load or the side load, a plurality of separate There is no need to install temporary poles at all.

Therefore, it is very economical because there is no need to separately purchase a plurality of temporary poles, equipment necessary for their installation, and other connecting auxiliary materials, and there is no waste of manpower and time required for installing the temporary poles.

In addition, in the conventional case, the concern of subsidence during construction is very high due to the problem of having to extend downward to the installation depth after excavating a number of temporary poles that have already been installed. Although there was a disadvantage that the construction speed is slowed down due to the problems that come, in the present invention, there is no installation of a temporary pole inside the tunnel unit 11, so the operation is not interfered at all, so the operation is very simple and quick, and the construction period is greatly shortened. can reduce

On the other hand, in the conventional case, since the upper part of a plurality of temporary columns is cut and embedded in the concrete structure, the cut surface is exposed to the outside and corrosion occurs, as well as the gap between the temporary column made of steel and the concrete, causing water leakage, etc. There were many difficulties in maintenance due to the problem of

As a result, the present invention according to Example 2 does not require the installation of a separate temporary pole at all, so it is economical, and the operation is very simple and quick, so that the construction period can be significantly reduced, as well as without the need for installing a temporary pole at all. Safe construction is possible, waterproof work is easy, and even waterproofing is perfect, so it is possible to construct a very safe underground structure faster and safer than any existing construction method.

<Example 3>

Embodiment 3 of the present invention relates to an underground structure installation method corresponding to the case in which the existing structure 20 serving as a slab on the upper portion, as shown in FIG. 6d, is performed. In the description, the same terms and reference numerals are used as they are.

First, a number of large-diameter steel pipes having a predetermined length and large diameters are press-fitted by horizontally attaching them to the tunnel construction surface using a hydraulic jack and a propulsion auxiliary pipe.

When the tunnel construction surface is square on the lower side of the existing structure 20, large-diameter steel pipes 210 and 220 are press-fitted on both sides of the upper side, and the internal soil is excavated and removed.

In this case, when the width of the existing structure 20 is wide, a large-diameter steel pipe 100 may be further installed on the upper part, and a vertical column 410 connected thereto may be further installed if necessary.

Then, since there is an existing structure 20 on the upper side of the upper both large-diameter steel pipes 100, both large-diameter steel pipes ( 100) Partially excavate the lower part to a predetermined height and depth to secure a part of the upper working space → form some cutouts 110 to a predetermined depth on opposite sides of both large-diameter steel pipes 100 and 100', respectively, and cut the cutouts A support beam 310 made of H-beam is installed in 110, but both ends of the support beam 310 are fixed to the upper surface of the support beam support 400 made of H-beam installed in a large-diameter steel pipe, and then the support beam 310 A step (S300-1) of safely supporting the existing structure 20 by installing the connection support 311 to support the existing structure 20 on the upper surface must be performed.

At this time, when performing the step (S300-1), the upper surface of the connection support 311 is narrow and sharp, so that the existing structure 20 is not damaged by stably supporting the existing structure 20 on the upper surface of the connection support 311. A support beam 320 for preventing damage may be further installed so that the

After forming the upper slab structure 1000 as described above, the step (S300-2) of forming the sidewall structure 2000 on the left and right lower ends of the upper slab structure 1000 should be performed.

First, the lower large-diameter steel pipe 100' is press-fitted to the lower side of the upper large-diameter steel pipe 100, and internal soil is excavated and removed.

Then, a small-diameter steel pipe 210 having a connector 211 having a connection groove 211a formed therein so that a loop is formed vertically on the outside between the upper both sides large-diameter steel pipe 100 and the lower large-diameter steel pipe 100' is intermittently press-fitted, , a small-diameter steel pipe 220 having a waterproof iron plate 221 having a separation prevention portion 221a formed at the tip between these small-diameter steel pipes 210 is press-fitted, and the tip of the waterproof iron plate 221 is connected to a connecting groove 211a ) so that the small-diameter steel pipes 210 and 220 are closely connected to each other by the waterproof iron plate 221 .

In this way, a small number of small-diameter steel pipes 210 and 220 can be used, which is economical, and the connection of the small-diameter steel pipes 210 and 220 is made very quickly, as well as the separation formed at the tip of the waterproof iron plate 221 . Since the prevention part 221a cannot come out from the connection groove 211a of the connector 211, the coupling state is also very strong.

Then, the left side of the tunnel part 11 of the small-diameter steel pipes 210 and 220 closely connected to each other is partially excavated to a predetermined height and depth to secure the left working space 10b, and then the lower large-diameter steel pipe 100') A large diameter steel pipe ( 100') Install the first vertical column 410 connecting the inner surface, and selectively weld the waterproof steel plate 221 if necessary, and at the same time, the upper and lower large-diameter steel pipes 100 and 100' and adjacent small-diameter steel pipes ( 210) to form a side wall structure 2000 on the left side by performing a waterproofing operation.

Then, the same operation as the method of forming the side wall structure 2000 on the left side is performed to secure the right working space 10c, and through this, the first support beam 310 is also supported on the right side from the bottom of the support beam support 400. Connect the large-diameter steel pipe 100' to install the first vertical column 410 on the right side, weld the waterproof steel plate 221, and at the same time, the small-diameter steel pipe adjacent to the upper and lower large-diameter steel pipes 100 and 100' 210) to form a side wall structure 2000 on the right side by performing a waterproofing operation.

When the step (S300-2) of forming the side wall structure 2000 is performed, the entire lower portion of the upper working space 10a already formed in the previous step is excavated at once to form the side wall structure 2000. not that

By excavating only the left side by a predetermined depth to secure the left working space (10b), and to connect and install the left first vertical pillar 410 to the left end of the first support beam 310 through this, the left first vertical pillar 410 is Not only is the installation work done very safely and quickly, but also the work of connecting and installing the first vertical column 410 to the right end of the first support beam 310 through the secured right working space 10c is also very safe and quick. it is done

After performing the step (S300-2) of forming the side wall structure 2000, the upper working space 10a is secured in the previous steps to form the upper slab structure 1000, and left and right working spaces ( After securing 10b) (10c) to form the left and right side wall structures 2000, the lower part of the tunnel 11 is excavated to secure the lower working space 10d, and then the lower part of the lower large-diameter steel pipes 100'. The inner surface is cut to form a cutout 110, and a first strut 510 is installed, but the lower ends of the first left and right vertical columns 410 vertically connected to both ends of the first upper support beam 310. The first strut (STRUT) 510 is connected and installed to perform the forming step (S100-3) of the floor structure 3000 to become a structurally strong rectangular support frame.

Then, thereafter, the operation of installing the next upper support beam 310 by excavating the upper part to a predetermined depth again to secure the upper working space 10a;

Excavating the left and right sides to secure the left and right working spaces 10b and 10c to a predetermined depth, and then installing the left and right vertical columns 410 at both ends of the next upper support beam 310 vertically;

To secure the upper working space 10a and the left and right working spaces 10b and 10c, excavate the remaining unexcavated lower part of the tunnel 11 to secure the lower working space 10d and support the next upper part. A rectangular support frame made of H-beam obtained by sequentially and continuously connecting the lower ends of the left and right vertical columns 410 connected vertically to both ends of the beam 310 with a STRUT 510 is formed with a large-diameter steel pipe. (100) Step (S300-4) of constructing a tunnel structure having a solid structure to withstand upper pressure and lateral pressure by installing sparsely to the end of a predetermined width;

Install the formwork 600 on the upper side and both sides of the tunnel part 11, but first reinforce the inside, then pour concrete and cure it, then remove the formwork to form the upper slab 1100 and the sidewall 2100 Step (S300-5) and;

After reinforcing reinforcement on the lower side of the tunnel unit 11, concrete is poured to form the tunnel bottom surface 3100 (S300-6).

The present invention according to the third embodiment as described above uses a smaller number of large-diameter steel pipes 100 and 100 ′ than the existing underground structure forming method, as well as small-diameter steel pipes 210 and 220, as in the first and second embodiments. In the connection work of the steel pipe, the small-diameter steel pipe 220 with the waterproof iron plates 221 welded on both sides is used. It is basic that is done quickly,

The work of constructing the upper slab structure 1000 and the side wall structure 2000 under the existing structure by closely connecting the small-diameter steel pipes 210 and 220 to each other is also performed very quickly.

And since there is an existing structure 20 serving as an upper loop in the upper part, it is possible to omit the operation of forming the upper loop by press-fitting the small-diameter steel pipes 210 and 220 in the upper part, so that the step (S300-1) is performed In addition, the support beam 310 can be installed horizontally so that the upper large-diameter steel pipe 100 is connected more quickly and safely, and the bottom surface of the support beam 310 is on the support beam support 400 inside the upper large-diameter steel pipe 100. Since the connecting support 311 installed on the upper surface of the support beam 310 safely supports the existing structure 20, the lower part of the existing structure 20 is sequentially excavated deeper by a plurality of support beams. Even if the 310 is connected horizontally, there is no fear that the existing structure 20 will collapse or work, so you can work with confidence.

In addition, since the waterproof iron plate 221 is previously welded and installed on both sides of the small-diameter steel pipe 220, the number of welding parts is small, so that the waterproofing work is done very quickly and perfectly.

On the other hand, the most characteristic of all is that the present invention does not excavate the entire tunnel 11 at once, but excavates the lower portions of the small-diameter steel pipes 210 and 220 closely connected to each other to a predetermined height and depth, thereby excavating the upper working space ( 10a) is secured and the support beams 310 are installed so that the large-diameter steel pipes 100 on both sides are connected through this,

After that, instead of excavating the entire lower portion of the upper working space 10a at once, only the left side is excavated to a predetermined depth to secure the left working space 10b, and through this, the left vertical column 410 is connected to the left end of the support beam 310. After installing,

Similarly, the right vertical column 410 is connected and installed at the right end of the support beam 310 through the right working space 10c secured by excavating the right side only by a predetermined depth,

To secure the upper working space 10a and the left and right working spaces 10c, excavate the remaining unexcavated lower part of the tunnel 11 to secure the lower working space 10d, and A rectangular support frame made of H-beam obtained by sequentially and continuously connecting and installing the lower ends of the left and right vertical columns 410 vertically connected at both ends to the end of the large-diameter steel pipe 100 It adopts a method of constructing a tunnel structure with a solid structure that withstands upper and lateral pressure by installing it sparsely with a predetermined width.

In order to install an underground structure using the conventional steel pipe loop method, a plurality of transverse support beams installed to support the steel pipes in order to withstand the upper load or lateral load generated during the excavation of the inner side of the steel pipe loop, that is, the tunnel part. A larger number of temporary columns should be installed than the directional support beams, but

In the present invention, since the rectangular support frames made of H-beams connecting and supporting the large-diameter steel pipes 100 and 100 ′ and the small-diameter steel pipes 210 and 220 bear the upper load or the side load, when excavating the tunnel 11 There is no need to separately install a plurality of temporary columns.

Therefore, it is very economical because there is no need to separately purchase a plurality of temporary poles and equipment and other connecting auxiliary materials required for their installation, and there is no waste of a lot of manpower and time required for installing the temporary poles.

In addition, in the conventional case, the concern of subsidence during construction is very high due to the problem of having to extend downward to the installation depth after excavating a number of temporary poles that have already been installed. Although there was a disadvantage that the construction speed is slowed down due to the problems that come, in the present invention, there is no installation of a temporary pole inside the tunnel unit 11, so the operation is not interfered at all, so the operation is very simple and quick, and the construction period is greatly shortened. can reduce

On the other hand, in the conventional case, since the upper part of a plurality of temporary columns is cut and embedded in the concrete structure, the cut surface is exposed to the outside and corrosion occurs, as well as the gap between the temporary column made of steel and the concrete, causing water leakage, etc. There were many difficulties in maintenance due to the problem of

As a result, the present invention according to Example 3 does not require the installation of a separate temporary pole at all, so it is economical, and the operation is very simple and quick, so that the construction period can be significantly reduced, as well as without the need for installing a temporary pole at all. Safe construction is possible, waterproof work is easy, and waterproofing is perfect, so it is possible to construct an underground structure that is structurally very safe, faster and safer than any existing construction method.

<Example 4>

Embodiment 4 of the present invention is shown in Fig. 6e, which uses any one of the methods of the upper slab structure of Embodiments 1, 2, and 3, but in particular, as a method that can be effectively used when forming the side wall structure on the left or right side. ,

In the case of performing the work consistent with Embodiments 1, 2, and 3, the same terms and reference numerals will be used as it is and will be described.

A small-diameter steel pipe 210 having a connector 211 having a connection groove 211a formed on the outside between the upper large-diameter steel pipe 100 and the lower large-diameter steel pipe 100' is press-fitted,

A waterproof iron plate 221 having separation prevention portions 221a formed at the upper and lower ends between the upper large-diameter steel pipe 100 and the small-diameter steel pipe 210 is press-fitted, but the upper end of the waterproof iron plate 221 is at the lower side of the upper large-diameter steel pipe 100 Insert the cutout 120 formed in the, and the lower end of the waterproof iron plate 221 is inserted into the connection groove 211a of the connector 211 formed in the small-diameter steel pipe 210 so that they are closely connected to each other,

Also between the small-diameter steel pipe 210 and the lower large-diameter steel pipe 100', a waterproof iron plate 221 having a separation prevention part 221a formed at the top and bottom is also press-fitted, but the upper end of the waterproof iron plate 221 is a small-diameter steel pipe 210 It is inserted into the connection groove 211a of the connector 211 formed on the lower side, and the lower end of the waterproof iron plate 221 is inserted into the cutout 120 formed on the upper side of the lower large-diameter steel pipe 100' so that they are closely connected to each other. ,→ Partially excavating the inside of the tunnel 11 of the small-diameter steel pipe 210 to a predetermined height and depth to secure the left working space 10b, → Cut the cutout 120 on the upper surface of the lower large-diameter steel pipe 100' A vertical column connecting the inner surface of the lower large-diameter steel pipe 100 ′ from the lower end of the support beam support 400 supporting the support beam 310 by installing a vertical column 410 made of an H-beam in the cutout 120 . (410) is installed, and the waterproofing iron plate 221 is welded so that the side part is completely waterproofed.

In the fourth embodiment, all of the basic features that can occur in the first and second embodiments are exhibited, and in particular, the side wall can be conveniently and quickly formed.

The present invention according to Examples 1 to 4 when installing the formwork 600 for forming the slab 1100 or the sidewall 2100,

By selectively welding and installing a concrete composite material 150 to the inner surface of the large-diameter steel pipe 100, 100' and the lower outer surface of the small-diameter steel pipe 210, 220,

By pouring concrete into the reinforced formwork 600 and curing the concrete, the large-diameter steel pipes 100 and 100 ′ and the small-diameter steel pipes 210 and 220 are integrated with the main structure of concrete, resulting in a more structurally sound permanent synthesis. concrete structures can be obtained.

Here, the concrete composite material 150 is a stud, which is welded and installed using a stud gun. It can be selectively welded to the bottom of the waterproof steel plate.

The concrete composite material 150 is not limited to only studs.

10a: upper working space 10b: left working space
10c: right working space 10d: lower working space
100,100': large diameter steel pipe 110: cutout
150: concrete composite material 210, 220: small diameter steel pipe
211: connector 211a: connector groove
221: waterproof plate 221a: separation prevention part
310: support beam 311: connection support
320: support beam for damage prevention 400: support beam support
410: vertical column 510: strut
1000: slab structure 1100: slab
2000: side wall structure 2100: side wall
3000: floor structure 3100: tunnel bottom surface

Claims (9)

A number of large-diameter steel pipes having a predetermined length and large diameters are press-fitted horizontally and vertically on the tunnel construction surface using a hydraulic jack and a propulsion auxiliary pipe.
The large-diameter steel pipe 100 is press-fitted on both sides of the upper side and the internal soil is excavated to remove it → The connecting groove 211a is formed so that a loop is formed horizontally on the outside between the upper both sides of the large-diameter steel pipe 100 A cow having a connector 211 A small-diameter steel pipe 210 having a waterproof iron plate 221 with a separation preventing part 221a formed at the tip end between the small-diameter steel pipes 210 is press-fitted, but the small-diameter steel pipe 210 is press-fitted. Insert the tip of the 221 into the connection groove 211a so that the small-diameter steel pipes 210 and 220 are closely connected to each other by the waterproof iron plate 221 → → The small-diameter steel pipes 210, which are closely connected to each other ( 220) Partially excavate the lower part to a predetermined height and depth to secure the upper working space 10a, → form some cutouts 110 to a predetermined depth on opposite sides of both large-diameter steel pipes 100, respectively, and cut the cutouts ( 110), but install the support beam 310 made of H-beam, both ends of the support beam 310 are fixed to the upper surface of the support beam support 400 made of H-beam, and then a small-diameter steel pipe ( The connection support 311 is installed to support the 210 and 220, and the waterproof steel plate 221 is welded and at the same time the large-diameter steel pipe 100 and the small-diameter steel pipe 210 adjacent to the large-diameter steel pipe 100 are welded to completely waterproof the upper part. an upper slab structure 1000 forming step (S100-1);
The lower large-diameter steel pipe 100' is press-fitted to the lower side of the upper large-diameter steel pipe 100, and internal soil is excavated and removed, and a loop is formed on the outside between the upper both large-diameter large-diameter steel pipe 100 and the lower large-diameter steel pipe 100'. The small-diameter steel pipe 210 having the connector 211 in which the connection groove 211a is formed is sparsely press-fitted, and the waterproof iron plate 221 with the separation prevention part 221a formed at the tip between these small-diameter steel pipes 210. ), but insert the tip of the waterproof iron plate 221 into the connection groove 211a so that the small diameter steel pipes 210 and 220 are closely connected to each other by the waterproof iron plate 221 . Next, → the left side of the tunnel section 11 of the small-diameter steel pipes 210 and 220 closely connected to each other is partially excavated to a predetermined depth to secure the left working space 10b, → the lower large-diameter steel pipe 100' A partial cutout 110 is formed on the upper surface to a predetermined depth, and a vertical column 410 made of an H-beam is installed in the cutout 110, but from the bottom of the support beam support 400 supporting the support beam 310 A vertical column 410 connecting the large-diameter steel pipes 100' is installed, and the waterproof steel plate 221 is welded, and the small-diameter steel pipe 210 adjacent to the upper and lower large-diameter steel pipes 100 and 110' is welded. The side wall structure 2000 is formed on the left side by welding so that the side part is completely waterproofed, and the right side is excavated to a predetermined depth in the same way to secure the right working space 10c to form the side wall structure 2000 on the right side step (S100-2);
The tunnel part 11 remaining after forming the upper slab structure 1000 by securing the upper working space 10a and securing the left and right working spaces 10b and 10c to form the left and right side wall structures 2000 ) excavated the lower part to secure the lower working space 10d, and then cut the lower inner surfaces of the lower large-diameter steel pipes 100' to form a cutout 110 and install a strut 510, but the upper support beam After performing the forming step (S100-3) of the floor structure 3000, which connects the lower ends of the left and right vertical pillars 410 vertically connected to both ends of the 310 to form a structurally strong rectangular support frame,
After that, excavating the upper part to a predetermined depth again to secure the upper working space (10a) and installing the next upper support beam 310 on the upper part;
Excavating the left and right sides to secure the left and right working spaces 10b and 10c to a predetermined depth, and then installing the left and right vertical columns 410 at both ends of the next upper support beam 310 vertically;
To secure the upper working space 10a and the left and right working spaces 10c, excavate the remaining unexcavated lower part of the tunnel 11 to secure the lower working space 10d, and A rectangular support frame made of an H-beam obtained by sequentially and continuously connecting the lower ends of the left and right vertical columns 410 connected vertically at both ends with a STRUT 510 is a large-diameter steel pipe (100) (100). ') constructing a tunnel structure having a solid structure to withstand upper pressure and lateral pressure by installing sparsely to the end with a predetermined width (S100-4);
Install the formwork 600 on the upper side and both sides of the tunnel part 11, first, reinforce the inside, then pour and cure the concrete, then remove the formwork to form the upper slab 1100 and the side wall 2100 Step (S100-5) and;
Underground structure installation method that does not require the installation of temporary pillars, characterized in that it comprises the step (S100-6) of forming the tunnel bottom surface 3100 by placing reinforcement on the lower side of the tunnel part 11 and then pouring concrete . A number of large-diameter steel pipes having a predetermined length and large diameters are press-fitted horizontally and vertically on the tunnel construction surface using a hydraulic jack and a propulsion auxiliary pipe.
If the tunnel construction surface is arched (circular), press-fit large-diameter steel pipes 210 and 220 on both upper and lower sides along the arch-shaped construction surface and excavate and remove internal soil → Upper large-diameter steel pipe 100 and lower both-side large-diameter steel pipes A small-diameter steel pipe 210 having a connector 211 having a connection groove 211a formed therein is intermittently press-fitted so that an arcuate loop is formed on the left and right sides between 100 ′, and between these small-diameter steel pipes 210 . A small-diameter steel pipe 220 having a waterproof iron plate 221 having a separation preventing portion 221a formed at its tip is press-fitted, and the tip of the waterproof iron plate 221 is inserted into the connection groove 211a to insert a small-diameter steel pipe 210 ( 220) so that they are closely connected to each other by the waterproof iron plate 221, → The left inside of the tunnel part 11 of the small-diameter steel pipes 210 and 220 closely connected to each other is partially excavated to a predetermined height and depth to work on the left. Secure the space 10b, → form a partial cutout 110 on the left side of the upper large-diameter steel pipe 100 and the upper surface of the lower large-diameter steel pipe 100', and support beams 310 made of H-beams in the cutout 110 ) is installed in an arcuate shape, but the upper end of the support beam 310 installed in an arcuate shape is fixed to be supported on the support beam support 400 installed in the upper large-diameter steel pipe 100, and the lower end of the support beam 310 is a large-diameter steel pipe on the lower left. (100') is fixed on the inner surface, and then the connection support 311 is installed to support the small-diameter steel pipes 210 and 220 with the upper surface of the support beam 310, and at the same time as welding the waterproof iron plate 221, the upper and By welding the large-diameter steel pipe 210, 220 and the small-diameter steel pipe 210 adjacent to the large-diameter steel pipe 210 and 220 on the lower left side, the left upper part and the side surface are completely waterproofed so that the left loop is completely waterproofed to form a left arcuate structure, In the same way, the right inside of the tunnel part 11 of the small-diameter steel pipes 210 and 220 closely connected to each other is excavated to a predetermined depth to secure the right working space 10c to form the right arcuate structure (S200- One);
The lower working space ( After securing 10d), the lower inner surfaces of the lower large-diameter steel pipes 100' are cut to form a cutout 110, and a strut 510 is installed, but the lower end of the arch-shaped support beam 310 is connected and installed. After performing the forming step (S200-2) of the floor structure 3000 to become a structurally strong arcuate support frame,
After that, the left side is again excavated to a predetermined depth to secure the left working space (10b), and the next arcuate support beam (310) is installed on the left side;
The operation of excavating the right side to a predetermined depth again to secure the right working space (10c) and installing the next arcuate support beam 310 on the right side;
In order to secure the left and right working spaces 10b and 10c, the lower inner surfaces of the lower large-diameter steel pipes 100' are cut by re-excavating and excavating the remaining unexcavated lower part of the tunnel to secure the lower working space 10d. A large-diameter steel pipe ( 100) (100') step (S200-3) of constructing a tunnel structure having a solid structure to withstand upper pressure and lateral pressure by installing it intermittently with a predetermined width up to the end (S200-3);
Step ( S300-4) and;
Installation of an underground structure that does not require the installation of temporary columns, characterized in that it comprises the step (S200-5) of forming the tunnel bottom surface 3100 by pouring concrete after reinforcing reinforcement on the lower side of the arch-shaped tunnel part 11 Method. A number of large-diameter steel pipes having a predetermined length and large diameters are press-fitted horizontally and vertically on the tunnel construction surface using a hydraulic jack and a propulsion auxiliary pipe.
If the tunnel construction surface is square on the lower side of the existing structure 20, press-fit the large-diameter steel pipe 100 on both sides of the upper side and excavate and remove the internal soil → Because there is an existing structure 20 on the upper side of the large-diameter steel pipe 100 on both sides of the upper side Partially excavating the lower portions of both large-diameter steel pipes 100 to a predetermined height and depth without the need to form an upper loop to secure a part of the upper working space 10a → Partially on opposite sides of both large-diameter steel pipes 100 to a predetermined depth The cutout 110 is formed and the support beam 310 made of H-beam is installed in the cutout 100, but the support beam 310 is installed at both ends in a large-diameter steel pipe. and then installing the connection support 311 to support the existing structure 20 with the upper surface of the support beam 310 to safely support the existing structure 20 (S300-1);
The lower large-diameter steel pipe 100' is press-fitted to the lower side of the upper large-diameter steel pipe 100, and internal soil is excavated and removed, and a loop is formed on the outside between the upper both large-diameter large-diameter steel pipe 100 and the lower large-diameter steel pipe 100'. The small-diameter steel pipe 210 having the connector 211 in which the connection groove 211a is formed is sparsely press-fitted, and the waterproof iron plate 221 with the separation prevention part 221a formed at the tip between these small-diameter steel pipes 210. ), but insert the tip of the waterproof iron plate 221 into the connection groove 211a so that the small diameter steel pipes 210 and 220 are closely connected to each other by the waterproof iron plate 221 . Then, → partly excavate the left inside of the tunnel section 11 of the small-diameter steel pipes 210 and 220 closely connected to each other to a predetermined height and depth to secure the left working space 10b, → the lower large-diameter steel pipe 100 ') Form a cutout 110 on the upper surface and install a vertical column 410 made of an H-beam in the cutout 110, but from the bottom of the support beam supporting beam 310, the lower large-diameter steel pipe 100' ) Install the vertical column 410 connecting the inner surface, weld the waterproof iron plate 221 and at the same time weld the upper and lower large-diameter steel pipes 100 and 100' and the adjacent small-diameter steel pipes 210 to waterproof the side part The step of forming the side wall structure 2000 on the left side so as to make perfect 2);
Tunnel part ( 11) Excavate the lower part to secure the lower working space 10d, then cut the lower inner surface of the lower large-diameter steel pipes 100' to form a cutout, and install a strut 510, but the upper support beam 310 After performing the forming step (S300-3) of the floor structure 3000 to form a structurally solid rectangular support frame by connecting the lower ends of the left and right vertical columns 410 vertically connected to both ends of the
After that, the operation of installing the next upper support beam 310 by excavating the upper part to a predetermined depth again to secure the upper working space 10a;
Excavating the left and right sides to secure the left and right working spaces 10b and 10c to a predetermined depth, and then installing the left and right vertical columns 410 at both ends of the next upper support beam 310 vertically;
To secure the upper working space 10a and the left and right working spaces 10b and 10c, excavate the remaining unexcavated lower part of the tunnel 11 to secure the lower working space 10d and support the next upper part. A rectangular support frame made of an H-beam obtained by sequentially and continuously connecting the lower ends of the left and right vertical columns 410 connected vertically to both ends of the beam 310 with a STRUT 510 is formed with a large-diameter steel pipe. (100) (100') step (S300-4) of constructing a tunnel structure having a solid structure to withstand upper pressure and lateral pressure by installing it intermittently with a predetermined width to the end (S300-4);
Install the formwork 600 on the upper side and both sides of the tunnel part 11, first, reinforcing the inside, and then pour and cure the concrete and then remove the formwork 600 to remove the upper slab 1100 and the side wall 2100. Forming a (S300-5) and;
Underground structure installation method that does not require the installation of temporary columns, characterized in that it comprises the step (S300-6) of forming the tunnel bottom surface 3100 by placing reinforcing bars on the lower side of the tunnel part 11 and then pouring concrete . 4. The method according to any one of claims 1 to 3,
An underground structure installation method that does not require the installation of a temporary column, characterized in that it is made to secure stability by press-fitting another large-diameter steel pipe (100) between the large-diameter steel pipes (100). 4. The method according to any one of claims 1 to 3,
If the formation width of the upper slab is to be built wide,
An underground structure installation method that does not require the installation of temporary columns, characterized in that another large-diameter steel pipe (100) is press-fitted between the large-diameter steel pipes (100), and a vertical column (410) is further installed to ensure stability . 4. The method according to any one of claims 1 to 3,
When forming a side wall structure on the left or right side,
A small-diameter steel pipe 210 having a connector 211 having a connection groove 211a formed on the outside between the upper large-diameter steel pipe 100 and the lower large-diameter steel pipe 100' is press-fitted,
A waterproof iron plate 221 having separation prevention portions 221a formed at the upper and lower ends between the upper large-diameter steel pipe 100 and the small-diameter steel pipe 210 is press-fitted, but the upper end of the waterproof iron plate 221 is at the lower side of the upper large-diameter steel pipe 100 The lower end of the waterproof steel plate 221 is inserted into the cutout 120 formed in the
Also between the small-diameter steel pipe 210 and the lower large-diameter steel pipe 100', a waterproof iron plate 221 having a separation prevention part 221a formed at the top and bottom is also press-fitted, but the upper end of the waterproof iron plate 221 is a small-diameter steel pipe 210 It is inserted into the connection groove 211a of the connector 211 formed on the lower side, and the lower end of the waterproof iron plate 221 is inserted into the cutout 120 formed on the upper side of the lower large-diameter steel pipe 100' so that they are closely connected to each other. ,→ Partially excavate the inside of the tunnel 11 of the small-diameter steel pipe 210 to a predetermined height and depth to secure the left working space 10b, → Cut the cut-out 110 on the upper surface of the lower large-diameter steel pipe 100' A vertical column connecting the inner surface of the lower large-diameter steel pipe 100 ′ from the lower end of the support beam support 400 supporting the support beam 310 by installing a vertical column 410 made of an H-beam in the cutout 110 . An underground structure installation method that does not require the installation of a temporary column, characterized in that by installing the 410 and welding the waterproof iron plate 221 to make the side part waterproof completely. 4. The method of claim 3,
When performing the step (S300-1), the upper surface of the connection support 311 is narrow and sharp, so that the existing structure 20 is not likely to be damaged. An underground structure installation method that does not require the installation of a temporary pole, characterized in that it is made by further installing a support beam 320 for preventing damage so that it is possible. 4. The method according to any one of claims 1 to 3,
When installing the formwork 600 for forming the slab 1100 or the side wall 2100,
By welding and installing a concrete composite material 150 to either or both of the inner surface of the large-diameter steel pipe 100, 100 ′ and the lower outer surface of the small-diameter steel pipe 210, 220,
By pouring concrete into the reinforced formwork 600 and curing the concrete, the large-diameter steel pipes 100 and 100 ′ and the small-diameter steel pipes 210 and 220 are integrated with the main structure of concrete, resulting in a more structurally sound permanent synthesis. An underground structure installation method that does not require the installation of temporary columns, characterized in that it is made to obtain a concrete structure. 9. The method of claim 8,
The concrete composite material 150 is a stud,
It is installed by welding using a stud gun, and welding installation on any one or two or more of the inner surface of the large-diameter steel pipe 100, 100', the lower outer surface of the small-diameter steel pipe 210, 220 and the bottom surface of the waterproof steel plate. An underground structure installation method that does not require the installation of a temporary pole characterized by being loaded.

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