KR20240001867A - Upper ground settlement-reducing loop steel pipe and pipe loop construction method using the same - Google Patents

Abstract

The present invention relates to an upper ground settlement-reducing roof steel pipe and a pipe loop construction method using the same. More specifically, end binding flanges are installed on both upper side surfaces of the loop steel pipe, and the side parts are continuously connected to each other to form a pipe loop. By constructing it so that it is installed, it prevents the upper ground from sinking due to the end-bound protruding steel plate being dislodged and deformed due to the self-weight of the upper ground and the vibration or shock load of passing vehicles or trains, and also prevents water leakage from passing vehicles passing through the upper ground. This relates to an upper ground settlement-reducing loop steel pipe that can ensure the safety of trains and a pipe loop construction method using the same.

Description

Upper ground settlement-reducing loop steel pipe and pipe loop construction method using the same{omitted}

The present invention relates to an upper ground settlement-reducing roof steel pipe and a pipe loop construction method using the same. More specifically, end binding flanges are installed on both upper side surfaces of the loop steel pipe, and the side parts are continuously connected to each other to form a pipe loop. By constructing it so that it is installed, it prevents the upper ground from sinking due to the end-bound protruding steel plate being dislodged and deformed due to the self-weight of the upper ground and the vibration or shock load of passing vehicles or trains, and also prevents water leakage from passing vehicles passing through the upper ground. This relates to an upper ground settlement-reducing loop steel pipe that can ensure the safety of trains and a pipe loop construction method using the same.

When constructing an underpass, sidewalk, or passageway by crossing the lower part of a road or railroad built on existing fill ground, the top cover is often shallow.

When constructing an underpass, sidewalk, or passage under shallow cover conditions as described above, a concrete structure is constructed by constructing a normal pipe loop and then placing the reinforcing bar within the pipe loop, or attaching it to the lower part of the pipe loop. A separate concrete structure is built as a wall.

In the case of the pipe loop method as described above, the conventional method is as described in the identification numbers 0025 to 0026 according to patent registration number 10-1616505 in the Korean Intellectual Property Office Registered Patent Gazette. First, it is basically a steel pipe press-in method, which is used in the ground. The structure is constructed, and the upper slab of the temporary structure, where the loaded load acts in the vertical direction, is constructed in the form of a composite slab (STS method) with continuous steel pipes, and the upper slab of the underground structure is constructed in the form of a composite slab (STS method) where the lateral earth pressure acts. Install side wall steel pipes spaced in parallel up and down, and in the spaced part between the side wall steel pipes, earth plate supports with a thumb pile function are installed longitudinally and vertically to fix the side wall steel pipes and earth plate supports. Construction is done by inserting and installing earth retaining members including earth plates.

Second, the fixation of the side wall steel pipe and the earth plate support is done by pouring concrete into the inside of the side wall steel pipe, including the slab steel pipe for upper slab construction, so that it is integrated, and hardened to strengthen each other.

In the case of the permanent steel pipe, the upper slab 100 has a side of the slab steel pipe 110, as shown in Figures 1 and 2 of the present invention and as described in identification numbers 0039 to 0042 of the prior invention patent. Construction is carried out by sequentially press-fitting them so that they are joined together.

For example, the slab steel pipe 110 uses a circular steel pipe as shown in FIG. 2b, and the first flange 111 is attached to one side of the slab steel pipe 110 so as to be spaced vertically, and the other flange of the slab steel pipe 110 A second flange 112 is attached to the side so as to be spaced apart vertically.

In addition, a latch ring 113 is formed in the center of one side (right side) of the slab steel pipe 110, and a T-shaped latch 114 is attached to the center of the other side (left side).

A method in which this slab steel pipe 110 is first press-fitted into the ground using a press-fitting means, and the T-shaped clasp 114 of another slab steel pipe 110 is inserted into the clasp 113 of the press-fitted slab steel pipe 110. It is press-fitted and installed so that the sides of the steel pipe come into contact.

In the case of the steel pipe shown and described in the above conventional invention patent, as shown in Figure 1 of the present invention, first flanges 31 are attached to both side parts of the steel pipe 32 so as to be spaced apart vertically, and the steel pipe 32 A second flange 35 is installed on the other side to be spaced vertically apart, and as shown in Figure 2, the slab steel pipe 110 uses a circular steel pipe, and a first flange is installed on one side of the slab steel pipe 110. The flange 111 is attached to be spaced apart vertically, and the second flange 112 is attached to the other side of the slab steel pipe 110 to be spaced up and down.

A first flange 31 and a second flange 35 attached to both side surfaces of the steel pipe 32, or a first flange 111 and a second flange 112 attached to both side parts of the slab steel pipe 110. In the case of the common case, the end of the flange 112 is each composed of a cantilever-type free end, so it is a combined structure that has no binding force at all against the self-weight of the upper ground or the vibration load or impact load of passing vehicles or trains, so it can be deformed by falling off downward. Therefore, the upper soil may flow down or leak to the extent corresponding to the volume that is deformed by falling off downward, and as a result, vehicles passing at high speed on the upper ground (2) of the depression (2') There is a problem that the train may overturn, causing a major safety accident.

If the problem of the above-described conventional invention patent is explained in more detail in Figure 3 of the present invention, when the self-weight of the upper ground or the vibration load or impact load of a passing vehicle or train acts, the material attached to both side parts of the steel pipe (3) The end of each flange (7) is separated downward, resulting in a deformed flange (7'), which deteriorates the quality of the binding, so that the upper soil may flow down or leak through the gap of the deformed flange (7'). As a result, vehicles or trains passing at high speed on the ground 2 above the depression 2' may overturn, causing a problem that can cause a large-scale safety accident.

In addition, as shown in Figures 1 and 2, in the process of press-fitting the steel pipe 110 of the conventional invention forward, soil is deposited forward within the confined space between the steel pipe 110 and the upper and lower flanges 111 and 112. When filled continuously, a cumulative resistance force is generated due to the friction between the earth and sand in the confined space and the main surface of the steel pipe 110 and the upper and lower flanges 111 and 112, so that the propulsion length of the steel pipe 110 is reduced or pressure is increased. There is a problem in that safety is reduced due to an increase in input, which causes bending in the steel pipe 110. In addition, there is a problem that safety is reduced through the front of the steel pipe 110, including the front part of the steel pipe 110 on the right or left side, between and above the steel pipe 110. · When excavating soil between the lower flanges (111, 112), on the ground (2) of the front surface between the steel pipes (110), including the steel pipe (110), and between the upper and lower flanges (111, 112). There is a problem in that a depression (2') is generated and as a result, a vehicle or train passing at high speed on the ground (2) above the depression (2') may overturn, causing a large-scale safety accident. am.

Meanwhile, as shown in Figures 1 and 2, the inside of the steel pipe 110 is filled with an internal filler including mortar or ready-mixed concrete only to the height between the upper and lower flanges 111 and 112, but the steel pipe 110 ) and the height difference between the upper and lower flanges (111, 112) are filled with more internal filler material, including unhardened concrete, which does not help reinforce the bending moment, resulting in an increase in construction costs due to an increase in material costs. There is a situation.

Korea Intellectual Property Office Registered Patent Gazette Patent Registration No. 10-1616505

In order to solve the conventional problems described above, the present invention installs end binding flanges on both the upper and lower side surfaces of the upper ground settlement reduction loop steel pipe, and binds the side parts in a continuous state to each other to prevent separation or deformation. By constructing the pipe loop to be installed by press-fitting only forward, the end binding flange is restrained from falling off and deforming due to the self-weight of the upper ground and the vibration or shock load of passing vehicles or trains, thereby preventing the upper ground from sinking. The purpose is to ensure the safety of passing vehicles and trains passing through the upper ground by preventing water leaks.

In addition, in the process of press-fitting the upper ground settlement reduction type loop steel pipe forward into the ground, the ground soil and sand within the confined space between the outside of the upper ground settlement reduction type loop steel pipe and the end binding flange or the outside of the upper ground settlement reduction type loop steel pipe It further includes a side hole for a loop steel pipe conductor that can discharge ground soil in the confined space between the upper and lower steel pipe parallel flange or the upper and lower end bound flanges in real time at any time, so that it is installed within the confined space. The purpose is to increase the propulsion length of the upper ground settlement reduction loop steel pipe and improve safety during construction by configuring it to remove or reduce the friction force between the main surface and soil on a real-time basis.

Meanwhile, in order to fill the inside of the upper ground settlement-reducing loop steel pipe with an internal filler containing unhardened concrete only to the height of the upper part of the lower end-bound flange, a lower end-bound flange is installed inside the lower part of the upper ground settlement-reducing loop steel pipe. By installing it as a temporary material by further including a crescent-shaped form manufactured to a height of less than or equal to the height of the lower steel pipe parallel joint flange, the lower part of the upper ground settlement reduction loop steel pipe is hardened by a volume corresponding to the crescent-shaped form. The purpose is to reduce construction costs due to a reduction in material costs by preventing internal fillers, including raw concrete, from being filled, thereby reducing the corresponding internal fillers.

In order to achieve the above object, the present invention replaces the connection structure in which both flanges of a conventional steel pipe for construction with a deformed flange, which are prone to falling off or being deformed, into a connected hinge form that can be moved forward in only one direction without falling off or deforming. By improving the end-binding flange, it does not fall off or deform even when the self-weight and impact load of the upper ground acts, so the principle of increasing safety in vehicle traffic is applied by preventing depressions from forming on the upper ground surface of the ground.

In order to apply the above principle to the present invention, a first embodiment of a steel pipe for a pipe loop includes a steel pipe having a predetermined diameter and a predetermined length; The outer surface of the steel pipe has a predetermined width and a length equal to the length of the steel pipe in a horizontal direction somewhat below the apex of both left and right sides, and one end is joined to the steel pipe, and the other end is in the form of a U-shaped hook. An end binding flange installed to be connected to; The steel pipe has a predetermined width and a length equal to the length of the steel pipe in a horizontal direction slightly above the low point on both left and right sides of the outer surface of the steel pipe, and one end is joined to the steel pipe, and the other end is in the form of a U-shaped hook. End binding flanges arranged to fit into the U-shaped hook and installed to be bound to each other; It relates to an upper ground settlement-reducing loop steel pipe, characterized in that it consists of.

In addition, a steel pipe having the predetermined diameter and the predetermined length; The outer surface of the steel pipe has a predetermined width and a length equal to the length of the steel pipe in a horizontal direction somewhat below the apex of both left and right sides, and one end is joined to the steel pipe, and the other end is in the form of a U-shaped hook. An end binding flange installed to be connected to; The steel pipe has a predetermined width and a length equal to the length of the steel pipe in a horizontal direction slightly above the low point on both left and right sides of the outer surface of the steel pipe, and one end is joined to the steel pipe, and the other end is in the form of a U-shaped hook. End binding flanges arranged to fit into the U-shaped hook and installed to be bound to each other; As a second embodiment, a pair of steel pipes arranged in parallel and somewhat spaced apart horizontally and having a predetermined diameter and a predetermined length; A steel pipe parallel coupling type flange installed between the outer surfaces of the pair of spaced steel pipes in a horizontal direction slightly below the apex of the steel pipe and joined to the steel pipe to have a predetermined width and a length equal to the length of the steel pipe; a steel pipe parallel coupling type flange installed between the outer surfaces of the pair of spaced steel pipes in a horizontal direction slightly above the low point of the steel pipe and joined to the steel pipe to have a predetermined width and the same length in the longitudinal direction as the steel pipe; On the right side of the outer surface of the right steel pipe and on the left side of the outer surface of the left steel pipe, each has a predetermined width in the horizontal direction somewhat below the apex of the steel pipe and a length equal to the length of the steel pipe, and one end is joined to the steel pipe, and the other end is U. An end binding flange installed to be connected in the form of a hook; On the right side of the outer surface of the right steel pipe and on the left side of the outer surface of the left steel pipe, each has a predetermined width in the horizontal direction slightly above the low point of the steel pipe and a length equal to the length of the steel pipe, and one end is joined to the steel pipe and the other end is U. An end binding flange installed to be connected in the form of a hook; It relates to an upper ground settlement reduction type loop steel pipe, characterized in that it is replaced by .

Meanwhile, in any one of the first and second embodiments, a predetermined gap is provided at predetermined intervals in the longitudinal direction of the steel pipe between the upper and lower steel pipe parallel coupling flanges or between the upper and lower end coupling flanges. It relates to an upper ground settlement reduction loop steel pipe, characterized in that it further includes a reinforcing bar insertion hole having a predetermined diameter penetrating the steel pipe at a height position.

In addition, in any one of the first and second embodiments, the left and right sides are slightly spaced apart in the longitudinal direction from the front of the leading steel pipe, which is first installed forward when press-fitting, based on the longitudinal direction of the steel pipe. It relates to an upper ground settlement reduction type loop steel pipe, characterized in that the side hole for the loop steel pipe conductor pipe is perforated in a circular shape with a predetermined diameter at a central position in the vertical direction of each diameter on the side portion.

Meanwhile, in any one of the first and second embodiments, a side hole edge reinforcement plate corresponding to a ring-shaped reinforcement plate having a predetermined width is provided to surround the inner side of the steel pipe of the side hole for the loop steel pipe lead pipe. It relates to an upper ground settlement-reducing loop steel pipe, characterized in that it further includes.

In addition, in any one of the first and second embodiments, the curvature of the steel pipe is the same as the curvature of the steel pipe so as to slightly protrude above the front portion of the leading steel pipe that is first installed toward the press-fitting front in the longitudinal direction of the steel pipe. It relates to an upper ground settlement-reducing loop steel pipe, characterized in that it further includes an upper ground settlement prevention plate having a width and length.

On the other hand, in constructing a pipe loop in the ground crossing underground in a shallow top cover for a typical road or railroad, the process includes manufacturing and installing a typical propulsion base including a reaction pile and a reaction wall; After the process of manufacturing and installing the propulsion base, a pipe loop is formed by continuously connecting the end flanges of the upper ground settlement reduction loop steel pipe and press-fitting them, and forming a pipe loop inside the upper ground settlement reduction loop steel pipe and the upper ground settlement reduction loop. A process of excavating ground soil in the confined space between the outside of the steel pipe and the end binding flange and simultaneously pushing the upper ground settlement-reducing loop steel pipe forward and pushing it forward; After the process of press-fitting and propelling the upper ground settlement-reducing roof steel pipe forward, a process of installing reinforcing bars through reinforcing bar insertion holes in a direction perpendicular to the longitudinal direction of the steel pipe; After the step of installing the reinforcing bars, a process of curing the inside of the upper ground settlement reduction type loop steel pipe and the inside of the confined space between the outside of the upper ground settlement reduction type loop steel pipe and the end binding flange with filler; After the process of filling and curing the filler, a process of excavating the soil and soil inside the pipe loop formed by continuously binding the upper ground settlement reduction loop steel pipe; A process of constructing a waterproof finishing hole on the inner surface of the pipe loop after excavating the ground soil inside the pipe loop; It relates to a pipe loop construction method using an upper ground settlement-reducing roof steel pipe, characterized in that it consists of.

In addition, after the process of manufacturing and installing the propulsion base, the end binding flanges of the upper ground settlement reduction type loop steel pipe are continuously connected to each other and press-fitted to form a pipe loop, and the interior and upper ground settlement reduction type of the upper ground settlement reduction type loop steel pipe are formed. A process of excavating ground soil in the confined space between the outside of the loop steel pipe and the end binding flange and simultaneously pushing and pushing the upper ground settlement-reducing loop steel pipe forward; The end binding flanges of the upper ground settlement reduction loop steel pipe are continuously connected and press-fitted to form a pipe loop, and the inside of the upper ground settlement reduction type loop steel pipe and the outside of the upper ground settlement reduction type loop steel pipe are parallel with the upper and lower steel pipes. A process of excavating ground soil in the confined space between the coupling flange and the upper and lower end coupling flanges and simultaneously pushing and pushing the upper ground settlement reduction loop steel pipe forward; It relates to a pipe loop construction method using an upper ground settlement-reducing roof steel pipe, characterized in that it is replaced by .

On the other hand, a pipe loop construction method using an upper ground settlement-reducing roof steel pipe, characterized in that a main body structure is further included and installed inside the waterproof finishing hole after the process of constructing a waterproof finishing hole targeting the inner surface of the pipe loop. It's about.

In addition, after the step of installing the reinforcing bars, a process of installing a crescent-shaped form further included in the lower part of the upper ground settlement reduction type loop steel pipe; After the process of filling and curing the filler, the lower part of the upper ground settlement reduction type loop steel pipe with a height corresponding to less than the height of the lower end binding type flange or less than the height of the lower steel pipe parallel combination type flange is shaped like a crescent moon. A process of cutting and removing, including the formwork; It relates to a pipe loop construction method using an upper ground settlement-reducing roof steel pipe, characterized in that it further includes.

In the present invention, end binding flanges are installed on both upper and lower sides of the upper ground settlement reduction loop steel pipe, and the side parts are continuously bound to each other, so that the pipe loop is installed by press-fitting only forward without falling off or deforming. By constructing it so that the end binding flange does not fall off and deform due to the self-weight of the upper ground and the vibration or shock load of passing vehicles or trains, it prevents the upper ground from sinking and prevents water leaks, ultimately maintaining the upper ground. It has the effect of ensuring the safety of passing vehicles or trains.

In addition, in the process of press-fitting the upper ground settlement reduction type loop steel pipe forward into the ground, the ground soil and sand within the confined space between the outside of the upper ground settlement reduction type loop steel pipe and the end binding flange or the outside of the upper ground settlement reduction type loop steel pipe It further includes a side hole for a loop steel pipe conductor that can discharge ground soil in the confined space between the upper and lower steel pipe parallel flange or the upper and lower end bound flanges in real time at any time, so that it is installed within the confined space. By configuring it to remove or reduce the friction force between the main surface and soil on a real-time basis, it has the effect of increasing the propulsion length of the upper ground settlement reduction loop steel pipe and improving safety during construction.

Meanwhile, in order to fill the inside of the upper ground settlement-reducing loop steel pipe with an internal filler containing unhardened concrete only to the height of the upper part of the lower end-bound flange, a lower end-bound flange is installed inside the lower part of the upper ground settlement-reducing loop steel pipe. By installing it as a temporary material by further including a crescent-shaped form manufactured to a height of less than or equal to the height of the lower steel pipe parallel joint flange, the lower part of the upper ground settlement reduction loop steel pipe is hardened by a volume corresponding to the crescent-shaped form. This has the effect of reducing construction costs due to a reduction in material costs by reducing the corresponding internal filler material by preventing the internal filler material, including raw concrete, from being filled.

Figure 1 is a first embodiment of a conventional invention, in which each flange end attached to both side surfaces of a steel pipe is composed of a free end in the form of a cantilever, and is deformed by falling off downward due to its own weight from the upper ground or impact force from a passing vehicle or train. A perspective view of an easy-to-make configuration.
Figure 2 is a second embodiment of the prior invention, in which each flange end attached to both side surfaces of a pair of steel pipes with a predetermined horizontal spacing is composed of a cantilever-shaped free end, so that it can be used for the self-weight of the upper ground or passing vehicles. A perspective view of a configuration that is prone to deformation by falling off downward due to impact force from a train.
Figure 3 shows a state in which each flange end attached to both sides of the steel pipe of the prior invention is composed of a free end in the form of a cantilever, and is deformed and detached downward due to its own weight from the upper ground or impact force from a passing vehicle or train, which is the cause of ground subsidence. A cross-sectional conceptual diagram of the principle by which ground depressions occur.
Figure 4 is a cross-sectional view of the first embodiment of the upper ground settlement reduction type loop steel pipe of the present invention.
Figure 5 is a cross-sectional view of the second embodiment of the upper ground settlement reduction type loop steel pipe of the present invention.
Figure 6 is a perspective view of the first embodiment of the upper ground settlement reduction type loop steel pipe of the present invention in a state in which a reinforcing bar insertion hole is further included.
Figure 7 is a perspective view of the second embodiment of the upper ground settlement-reduced loop steel pipe of the present invention further including a reinforcing bar insertion hole.
Figure 8 is a perspective view of the first embodiment of the upper ground settlement-reducing loop steel pipe of the present invention, which further includes an upper ground settlement prevention plate, a side hole for the loop steel pipe lead pipe, and a side hole edge reinforcement plate on the leading steel pipe, respectively.
Figure 9 is a perspective view of a second embodiment of the upper ground settlement-reducing loop steel pipe of the present invention, which further includes an upper ground settlement prevention plate, a side hole for the loop steel pipe lead pipe, and a side hole edge reinforcement plate on the leading steel pipe, respectively.
Figure 10 is a cross-sectional view of the first embodiment of the upper ground settlement reduction loop steel pipe of the present invention with reinforcing bars installed and filled with filler.
Figure 11 is a cross-sectional view of the second embodiment of the upper ground settlement reduction loop steel pipe of the present invention with reinforcing bars installed and filled with filler.
Figure 12 is a cross-sectional view showing a state in which a crescent-shaped formwork is installed at the lower part of the first embodiment of the upper ground settlement reduction type loop steel pipe of the present invention.
Figure 13 is a cross-sectional view of the pipe loop construction method using the upper ground settlement-reduced loop steel pipe of the present invention.
Figure 14 is a cross-sectional view of the upper ground settlement reduction type loop steel pipe being press-fitted forward into the ground during construction of the pipe loop construction method using the upper ground settlement reduction type loop steel pipe of the present invention.
Figure 15 is a plan view of the upper ground settlement reduction type loop steel pipe being press-fitted forward into the ground during construction of the pipe loop construction method using the upper ground settlement reduction type loop steel pipe of the present invention.
Figure 16 is a construction process diagram of the pipe loop construction method using the upper ground settlement reduction loop steel pipe of the present invention.

Since the present invention can be modified in various ways and can have various embodiments, specific embodiments will be illustrated in the drawings and described in detail in the detailed description. However, this is not intended to limit the present invention to specific embodiments, and should be understood to include all changes, equivalents, and substitutes included in the spirit and technical scope of the present invention.

The present invention is not limited to the embodiments disclosed below and may be implemented in various different forms, but the present embodiments only serve to complete the disclosure of the present invention and to fully convey the scope of the invention to those skilled in the art. It is provided for information purposes only.

Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the attached drawings.

Additionally, in describing the present invention, if it is determined that a detailed description of a related known configuration or function may obscure the gist of the present invention, the detailed description will be omitted.

Figure 1 is a first embodiment of a conventional invention, in which each flange end attached to both side surfaces of a steel pipe is composed of a free end in the form of a cantilever, and is deformed by falling off downward due to its own weight from the upper ground or impact force from a passing vehicle or train. Figure 2 is a perspective view of an easy-to-use configuration, and Figure 2 is a second embodiment of the prior invention, in which each flange end attached to both side surfaces of a pair of steel pipes with a predetermined horizontal distance is composed of a cantilever-shaped free end, It is a perspective view of a configuration that is prone to deformation by falling off downward due to the ground's own weight or impact force from passing vehicles or trains. Figure 3 shows that each flange end attached to both sides of the steel pipe of the prior invention is composed of a cantilever-shaped free end. It is a cross-sectional conceptual diagram of the principle in which a ground depression, which is the cause of ground subsidence, is generated in a state in which it is deformed and dislodged downward by the self-weight of the upper ground or the impact force from passing vehicles or trains, and Figure 4 is a cross-sectional conceptual diagram of the upper ground subsidence reduction type loop steel pipe of the present invention. It is a cross-sectional view of the first embodiment, and Figure 5 is a cross-sectional view of the second embodiment of the upper ground settlement-reducing loop steel pipe of the present invention, and Figure 6 is a cross-sectional view of the first embodiment of the upper ground settlement-reducing loop steel pipe of the present invention, adding a reinforcing bar insertion hole. Figure 7 is a perspective view of the second embodiment of the upper ground settlement reduction type loop steel pipe of the present invention further including a reinforcing bar insertion hole, and Figure 8 is a perspective view of the upper ground settlement reduction type loop steel pipe of the present invention. As one example of the first embodiment of the loop steel pipe, the leading steel pipe further includes an upper ground settlement prevention plate, a side hole for the loop steel pipe leading pipe, and a side hole edge reinforcement plate, respectively. Figure 9 is a perspective view of the upper ground settlement reduction type of the present invention. As one example of the second embodiment of the loop steel pipe, the leading steel pipe further includes an upper ground settlement prevention plate, a side hole for the loop steel pipe leading pipe, and a side hole edge reinforcement plate, respectively. Figure 10 is a perspective view of the upper ground settlement reduction type of the present invention. It is a cross-sectional view of the first embodiment of the loop steel pipe with reinforcing bars installed and filled with filler, and Figure 11 is a cross-sectional view of the second embodiment of the upper ground settlement reduction loop steel pipe of the present invention with reinforcing bars installed and filled with filler. 12 is a cross-sectional view showing a state in which a crescent-shaped formwork is installed at the lower part of the first embodiment of the upper ground settlement-reducing loop steel pipe of the present invention, and Figure 13 is a cross-sectional view of the pipe loop construction method using the upper ground settlement-reducing loop steel pipe of the present invention. , and Figure 14 is a cross-sectional view of the upper ground settlement reduction type loop steel pipe forward in the ground during construction of the pipe loop construction method using the upper ground settlement reduction type loop steel pipe of the present invention, and Figure 15 is a press-fitting cross-sectional view of the upper ground settlement reduction type loop steel pipe of the present invention. It is a plan view of the upper ground settlement reduction type loop steel pipe being press-fitted forward into the ground during the construction of the pipe loop construction method using a loop steel pipe, and Figure 16 shows the construction process diagram of the pipe loop construction method using the upper ground settlement reduction type loop steel pipe of the present invention. will be.

As shown in FIGS. 1 to 3, the present invention provides a connection structure in which both flanges 7 of the conventional steel pipe 1 for construction are easily deformed or dislodged by the deformed flange 7'. In the present invention, the connection structure is provided in FIGS. 4 to 12. As shown in , it has been improved to be an end-bound flange (13), which is a type of bound hinge that can only be moved forward in one direction without falling off or deforming, so that it does not fall off even when the self-weight and impact load of the upper ground (2) acts. The principle of increasing safety in vehicle traffic was applied by preventing depressions (2') from forming on the surface of the upper ground (2) because they are not deformed.

In order to apply the above principle to the present invention, a first embodiment of a steel pipe for a pipe loop includes, as shown in Figures 4 and 6, a steel pipe 11 having a predetermined diameter and a predetermined length; The outer surface of the steel pipe 11 has a predetermined width and a length equal to the length of the steel pipe 11 in a horizontal direction slightly below the apex of both left and right side surfaces, and one end is joined to the steel pipe 11. The other end includes an end binding flange (13) installed to be fastened in a typical U-shaped (or “ㄷ”-shaped) hook shape; The steel pipe 11 has a predetermined width and a length equal to the length of the steel pipe 11 in a horizontal direction slightly above the low point on both the left and right sides of the outer surface of the steel pipe 11, and one end is joined to the steel pipe 11. The other end is in the form of a U-shaped hook, and an end binding flange (13) is arranged to fit into the U-shaped hook and is installed to be bound; It relates to an upper ground settlement reduction type loop steel pipe (9), characterized in that it consists of.

Here, when joining the conventional steel pipe 11 and the end-binding flange 13 manufactured by processing a conventional steel plate, it is economical and desirable to use conventional welding.

In addition, as shown in FIGS. 4 and 6, a steel pipe 11 having a predetermined diameter and a predetermined length; The outer surface of the steel pipe 11 has a predetermined width and a length equal to the length of the steel pipe 11 in a horizontal direction slightly below the apex of both left and right side surfaces, and one end is joined to the steel pipe 11. The other end includes an end binding flange (13) installed to be fastened in the form of a typical U-shaped hook; The steel pipe 11 has a predetermined width and a length equal to the length of the steel pipe 11 in a horizontal direction slightly above the low point on both the left and right sides of the outer surface of the steel pipe 11, and one end is joined to the steel pipe 11. The other end is in the form of a typical U-shaped hook, and an end binding flange (13) is arranged to fit into the U-shaped hook and is installed to be bound; As shown in FIGS. 5 and 7, in the second embodiment, a pair of steel pipes 11 arranged in parallel and somewhat spaced apart horizontally and having a predetermined diameter and a predetermined length; It is installed in a state joined to the steel pipe 11 so as to have a predetermined width in the horizontal direction somewhat below the apex of the steel pipe 11 between the outer surfaces of the pair of spaced steel pipes 11 and have a length equal to the length of the steel pipe 11. A steel pipe parallel coupling flange (17); Between the outer surfaces of the pair of spaced steel pipes 11, a steel pipe 11 is joined to a predetermined width in the horizontal direction slightly above the low point of the steel pipe 11 and has the same length in the longitudinal direction as the steel pipe 11. A steel pipe parallel coupling flange (17) installed in a state; On the right side of the outer surface of the right steel pipe 11 and on the left side of the outer surface of the left steel pipe 11, each has a predetermined width in the horizontal direction somewhat below the apex of the steel pipe 11 and a length equal to the length of the steel pipe 11. An end binding flange (13) installed at one end to be joined to the steel pipe (11) and at the other end to be fastened in the form of a typical U-shaped hook; On the right side of the outer surface of the right steel pipe 11 and on the left side of the outer surface of the left steel pipe 11, each has a predetermined width in the horizontal direction slightly above the low point of the steel pipe 11 and a length equal to the length of the steel pipe 11. An end binding flange (13) installed at one end to be joined to the steel pipe (11) and at the other end to be fastened in the form of a typical U-shaped hook; It relates to an upper ground settlement reduction type loop steel pipe (15), characterized in that it is replaced with .

Here, the steel pipe parallel coupling flange 17 is a conventional steel plate, and it is economical and desirable to join it with the steel pipe 11 using conventional welding.

Meanwhile, in any one of the first and second embodiments, as shown in Figures 6 and 7, between the upper and lower steel pipe parallel coupling flanges 17 or the upper and lower end coupling type Characterized in that it further includes a reinforcing bar insertion hole 19 having a predetermined diameter that penetrates the steel pipe 11 at a predetermined height at predetermined intervals in the longitudinal direction of the steel pipe 11 between the flanges 13. It relates to a roof steel pipe (9, 15) with reduced upper ground settlement.

Here, the reinforcing bar insertion hole 19 is preferably drilled using a laser drilling method of a conventional steel pipe 11 or steel plate, and is located between the inside of the steel pipe 11 and the upper and lower end binding flanges 13. Insert reinforcing bars (25) containing conventional reinforcing bars into the space between the upper and lower steel pipe parallel joint flanges (17), and then fill the space with filler (27) containing conventional unhardened concrete for curing. It is intended to be used directly as an economical main body structure.

In addition, in any one of the first and second embodiments, as shown in Figures 8 and 9, a leading pipe is first installed forward when press-fitting with respect to the longitudinal direction of the steel pipe 11. It further includes side holes 21 for loop steel pipe lead pipes in which the steel pipe is perforated in a circular shape with a predetermined diameter at the central portion in the vertical direction of the diameter, respectively, on the left and right side surfaces slightly spaced apart in the longitudinal direction from the front of the steel pipe 11. It relates to a roof steel pipe (9, 15) with reduced upper ground settlement, characterized in that it is constructed.

Here, the side hole 21 for the loop steel pipe conductor is preferably drilled using a laser drilling method of a conventional steel pipe 11 or steel plate.

Meanwhile, in any one of the first and second embodiments, as shown in Figures 8 and 9, a predetermined hole is formed to surround the inside of the steel pipe 11 of the side hole 21 for the loop steel pipe leading pipe. It relates to an upper ground settlement reduction type loop steel pipe (9, 15), characterized in that it further includes a side hole edge reinforcement plate (24) corresponding to a ring-shaped reinforcement plate having a width.

Here, it is preferable to use the side hole edge reinforcement plate 24 by cutting a conventional steel pipe 11 with the same curvature, or to use a conventional laser drilling and cutting method of a steel sheet.

In addition, in any one of the first and second embodiments, as shown in Figures 8 and 9, the leading steel pipe 11 is installed first based on the longitudinal direction of the steel pipe 11. The upper ground settlement reduction loop steel pipe (9) is characterized in that it further includes an upper ground settlement prevention plate (23) having the same curvature of the steel pipe (11) and having a predetermined width and length so as to slightly protrude from the upper part of the front part of the steel pipe (9). , 15).

Here, the upper ground subsidence prevention plate 23 is preferably used by cutting and welding a typical steel pipe 11 to have the same curvature as the steel pipe 11.

Meanwhile, as shown in Figures 13 to 16, when constructing a pipe loop in the ground crossing underground in a shallow top cover for a typical road or railway, the reaction pile 47 and the reaction wall 33 A process of manufacturing and installing a typical propulsion unit including; After the process of manufacturing and installing the propulsion base, the end binding flanges (13) of the upper ground settlement-reducing roof steel pipe (9) are continuously connected to each other and press-fitted to form a series of " "Brother or couplet " A pipe loop (31) is formed using a shape, etc., and a confined space is formed between the inside of the upper ground settlement reduction type loop steel pipe (9) and the outside of the upper ground settlement reduction type loop steel pipe (9) and the end binding flange (13). A process of excavating soil and sand within the ground (2) and simultaneously pushing the upper ground settlement reduction type loop steel pipe (9) forward and pushing it forward; A process of pushing the upper ground settlement reduction type loop steel pipe (9) forward and pushing it forward; A process of installing reinforcing bars 25 through reinforcing bar insertion holes 19 in a direction perpendicular to the longitudinal direction of the steel pipe 11; After the process of installing the reinforcing bars 25, an upper ground settlement reduction loop steel pipe ( A process of curing the inside of 9) and the confined space between the outside of the upper ground settlement-reducing loop steel pipe 9 and the end binding flange 13 with filler 27; filling the filler 27; After the curing process, a process of excavating the ground (2) inside the pipe loop (31) constructed by continuously binding with the upper ground settlement reduction loop steel pipe (9); The ground (2) inside the pipe loop (31) After the process of excavating the soil, a process of constructing a conventional waterproof finishing hole (51) on the inner surface of the pipe loop (31); A pipe loop construction method using an upper ground settlement reduction loop steel pipe, which consists of the following: It's about.

Here, as shown in Figure 14, the reaction pile 47 uses a typical H beam, and the reaction wall 33 preferably uses a concrete material including a typical embankment material.

The reaction force of the reaction wall (33) should be planned to support more than the indentation thrust when injecting the upper ground settlement reduction type loop steel pipe (9), and the ground (2) condition and the upper ground settlement reduction type loop steel pipe (9) for indentation. There are differences depending on the pipe diameter and extension length, but usually it must be constructed to have a large reaction force of several hundred tons.

In addition, after installing the reaction wall 33, a straight pressing stroke 43 is performed on the bogie 35 as shown in FIGS. 14 and 15 on the front part of the reaction wall 33 and the embankment ground 13. A balance rail (49) is installed at the front of a typical steel pipe pressing device consisting of a hydraulic cylinder (41) equipped with a piston that repeats the and return strokes (45) according to field conditions.

Here, a stand composed of a typical H-beam frame is installed at the lower part of the steel pipe press-in device, and the balance rail 49 is an upper ground settlement-reduced loop steel pipe to be press-fitted into the embankment ground 2 including the original ground 2 ( 9) It is desirable to set and fix the center position at a height that takes into account the height.

After installing the steel pipe press-in device and the balance rail (49), a conventional crane is used on the upper part of the balance rail (49), which is the front part of the steel pipe press-in device, and a leading upper ground settlement reduction type loop steel pipe (9) is installed for subsequent operations. Arrange the upper ground settlement-reducing loop steel pipe (9).

In addition, after arranging the following upper ground settlement reduction type loop steel pipes (9), including the leading upper ground settlement reduction type loop steel pipe (9), they are advanced by a predetermined length unit through the embankment ground (2) to form 1 The upper ground settlement reduction loop steel pipe (9) for leading the turn is press-fitted.

Here, the leading upper ground settlement reduction type loop steel pipe (9) is pressed into the embankment ground (2) by advancing the piston, and since the normal stroke of the piston is 1 m, a 6m upper ground settlement reduction type loop steel pipe for press fit ( In order to completely press-fit 9) into the embankment ground (2), the piston must repeat the press-fit stroke (43) at least 6 times in theory, and since the stroke of the piston is limited, the press-fit stroke (43) of the piston must compensate for the insufficient 5 m. It uses an auxiliary push bar (39), which is a type of tubular block with a length of 1 m, which is the same as the stroke of the piston, and the auxiliary push bar (39) is attached to the front and rear parts of the piston. Typical fastening screws required to connect the two in the vertical direction are formed, and in the case of one upper ground settlement-reducing loop steel pipe (9) for press-in, at least one worker enters or uses normal earth and sand removal equipment to secure the steel pipe ( 11) Internal ground (2) It is a medium-to-large diameter pipe with secured work space to remove soil. The typical diameter is 800~1,500mm or more and the length is about 6m.

After the upper ground settlement reduction type loop steel pipe (9) for the first press-fit is press-fitted, the first-round piston is moved backward and returned.

In addition, after the first piston is moved backward and returned, the auxiliary pusher 39 is inserted into the front part of the piston and the rear part is fastened to the front part of the piston.

With the auxiliary push bar (39) inserted into the front part of the piston, the rear part of the piston is fastened to the front part of the piston, and then the piston is advanced again by a predetermined length unit to form an upper ground settlement reduction loop steel pipe (9) for the second press fit. ) is press-fitted.

Here, the length per piece of the auxiliary push bar 39 is, for example, 1m standard product, 2m standard product, 3m standard product, etc. when pressing the upper ground settlement reduction loop steel pipe 9 for press-fitting forward by 1m. Using them separately and in combination is more efficient and preferable than uniformly using only specific standard products.

Meanwhile, the piston is advanced again in predetermined length units to press-fit the upper ground settlement-reducing loop steel pipe 9 for the second press-in, and then returns to a backward force state to remove the press-in force of the second-round piston.

In addition, after the piston is moved backwards and returned in the second round, the piston is repeatedly moved forward and backward from the third round to complete the press-fitting of the 6 m upper ground settlement reduction loop steel pipe 9 for press-fitting.

Meanwhile, after the press-fitting of the upper ground settlement reduction type loop steel pipe 9 is completed, the ground 2 soil within the press-fitted upper ground settlement reduction type loop steel pipe 9 is removed to the outside.

Here, the work of removing soil from the ground (2) within the press-fitted upper ground settlement reduction loop steel pipe (9) is carried out using normal manpower or normal soil removal equipment.

In addition, after carrying out the soil (2) of the ground (2) in the upper ground settlement reduction type loop steel pipe (9) for the first press fit, another upper ground settlement reduction type loop steel pipe (9, 15) is butted against the rear part of the first press fit. The upper ground settlement reduction loop steel pipe (9) for the second press fit is welded and connected.

On the other hand, after welding and connecting another upper ground settlement reduction type roof steel pipe (9) for the second press fit against the rear part of the upper ground settlement reduction type loop steel pipe (9) for the first press fit, from the third time onwards, 1, Repeat as in the second round to press-fit the entire upper ground subsidence-reducing loop steel pipe (9).

From the 3rd time onwards, the same process as the 1st and 2nd times is repeated to perform press-fitting construction of the overall upper ground settlement-reducing loop steel pipe (9).

In addition, after the process of manufacturing and installing the propulsion base, the end binding flanges 13 of the upper ground settlement reduction type loop steel pipe 9 are continuously connected and press-fitted to form a pipe loop 31, and the upper ground settlement reduction type loop is formed. While excavating the soil (2) in the confined space between the inside of the steel pipe (9) and the outside of the upper ground settlement-reducing loop steel pipe (9) and the end binding flange (13), the upper ground settlement-reducing loop steel pipe A process of pushing and pushing (9) forward; The end binding flanges 13 of the upper ground settlement reduction loop steel pipe 15 are continuously connected and press-fitted to form a pipe loop 31, and the interior and upper ground settlement of the upper ground settlement reduction loop steel pipe 15 is formed. The ground (2) within the confined space between the outside of the reduced loop steel pipe (15) and the upper and lower steel pipe parallel coupling flanges (17) and the upper and lower end coupling flanges (13) is excavated and the upper ground at the same time. A process of pushing and pushing the sinkage-reducing loop steel pipe (15) forward; It relates to a pipe loop construction method using an upper ground settlement-reducing roof steel pipe, characterized in that it is replaced by .

Here, in the case of excavating the soil (2) in the confined space between the outside of the upper ground settlement reduction type loop steel pipe 15 and the end binding flange 13 and the upper ground settlement reduction type loop steel pipe 15 When excavating the ground (2) soil within the constrained space between the outside and the upper and lower steel pipe parallel combination type flange (17) and the upper and lower end connection type flange (13), it is commonly installed on the side of the steel pipe (11). It is desirable to excavate through the side hole (21) for the loop steel pipe lead pipe using a conventional ground (2) soil excavator or manpower.

On the other hand, after the process of constructing the waterproof finishing hole 51 on the inner surface of the pipe loop 31, the upper part is configured to further include and install a main body structure 53 inside the waterproof finishing hole 51. This relates to a pipe loop construction method using ground settlement-reducing loop steel pipe.

Here, the waterproof finishing hole 51 or the main body structure 53 is a typical structure, and the main structure 53 is a typical reinforced concrete structure and is preferably constructed as a composite wall on the inner side of the pipe loop 31.

In addition, as shown in Figure 12, after the process of installing the reinforcing bars 25, a process of installing a crescent-shaped formwork 29 at the lower part of the upper ground settlement reduction loop steel pipes 9 and 15; ; After the process of filling and curing the filler 27, a height corresponding to the lower part of the filler 27 is lower than the height of the lower end binding flange 13 or lower than the height of the lower steel pipe parallel coupling flange 17. A process of cutting and removing the lower part of the upper ground settlement reduction loop steel pipe (9, 15), including the crescent-shaped formwork (29); It relates to a pipe loop construction method using an upper ground settlement-reducing roof steel pipe, characterized in that it further includes.

Here, the crescent-shaped formwork (29) is composed of conventional wood, plywood, or synthetic formwork, and the lower part of the upper ground settlement reduction loop steel pipe (9, 15) is cut into the crescent-shaped formwork ( 29) It is desirable to cut it including.

Although the present invention has been illustrated and described with preferred embodiments as discussed above, it is not limited to the above-described embodiments and is intended to be used by those skilled in the art without departing from the spirit of the invention. Of course, various modifications and variations are possible within the scope of equivalence of the technical idea of the present invention and the scope of the patent claims described below.

1: Steel pipe for conventional construction methods 2: Ground
2': depression 7: flange
7': modified flange
9: Upper ground settlement reduction loop steel pipe (first embodiment)
11: Steel pipe 13: End binding flange
15: Upper ground settlement reduction loop steel pipe (second embodiment)
17: Steel pipe parallel combination flange 19: Reinforcing bar insertion hole
21: Side hole for loop steel pipe lead pipe 23: Upper ground settlement prevention plate
24: Side hole edge reinforcement plate 25: Reinforcement bar
27: Filler 29: Crescent-shaped mold
31: pipe loop 33: reaction wall
35: Bogie 39: Auxiliary pusher
41: Hydraulic cylinder 43: Pressing stroke
45: return stroke 47: reaction pile
49: Flat rail 51: Waterproof finish hole
53: main body structure

Claims (10)

In the steel pipe for pipe loop,
A steel pipe having a predetermined diameter and a predetermined length;
The outer surface of the steel pipe has a predetermined width and a length equal to the length of the steel pipe in a horizontal direction somewhat below the apex of both left and right sides, and one end is joined to the steel pipe, and the other end is in the form of a U-shaped hook. An end binding flange installed to be connected to;
The steel pipe has a predetermined width and a length equal to the length of the steel pipe in a horizontal direction slightly above the low point on both left and right sides of the outer surface of the steel pipe, and one end is joined to the steel pipe, and the other end is in the form of a U-shaped hook. End binding flanges arranged to fit into the U-shaped hook and installed to be bound to each other;
An upper ground settlement-reducing loop steel pipe, characterized in that it consists of. According to paragraph 1,
a steel pipe having the predetermined diameter and the predetermined length;
The outer surface of the steel pipe has a predetermined width and a length equal to the length of the steel pipe in a horizontal direction somewhat below the apex of both left and right sides, and one end is joined to the steel pipe, and the other end is in the form of a U-shaped hook. An end binding flange installed to be connected to;
The steel pipe has a predetermined width and a length equal to the length of the steel pipe in a horizontal direction slightly above the low point on both left and right sides of the outer surface of the steel pipe, and one end is joined to the steel pipe, and the other end is in the form of a U-shaped hook. End binding flanges arranged to fit into the U-shaped hook and installed to be bound to each other; cast
a pair of steel pipes arranged in parallel and somewhat spaced apart horizontally and having a predetermined diameter and a predetermined length;
A steel pipe parallel coupling type flange installed between the outer surfaces of the pair of spaced steel pipes in a horizontal direction slightly below the apex of the steel pipe and joined to the steel pipe to have a predetermined width and a length equal to the length of the steel pipe;
a steel pipe parallel coupling type flange installed between the outer surfaces of the pair of spaced steel pipes in a horizontal direction slightly above the low point of the steel pipe and joined to the steel pipe to have a predetermined width and the same length in the longitudinal direction as the steel pipe;
On the right side of the outer surface of the right steel pipe and on the left side of the outer surface of the left steel pipe, each has a predetermined width in the horizontal direction somewhat below the apex of the steel pipe and a length equal to the length of the steel pipe, and one end is joined to the steel pipe, and the other end is U. An end binding flange installed to be connected in the form of a hook;
On the right side of the outer surface of the right steel pipe and on the left side of the outer surface of the left steel pipe, each has a predetermined width in the horizontal direction slightly above the low point of the steel pipe and a length equal to the length of the steel pipe, and one end is joined to the steel pipe and the other end is U. An end binding flange installed to be connected in the form of a hook;
An upper ground settlement-reducing loop steel pipe, characterized in that it is replaced by . According to any one of claims 1 and 2,
Between the upper and lower steel pipe parallel coupling flanges or between the upper and lower end coupling flanges, a reinforcing bar insertion hole having a predetermined diameter is formed through the steel pipe at a predetermined height at a predetermined interval in the longitudinal direction of the steel pipe. An upper ground settlement-reducing loop steel pipe, characterized in that it further includes. According to any one of claims 1 and 2,
Based on the longitudinal direction of the steel pipe, a circular shape with a predetermined diameter is formed at the center position in the vertical direction of the diameter on the left and right side sides slightly spaced in the longitudinal direction from the front of the leading steel pipe, which is first installed forward when press-fitting, based on the longitudinal direction of the steel pipe. An upper ground settlement-reducing loop steel pipe, characterized in that it further includes a side hole for the loop steel pipe lead pipe through which the steel pipe is perforated. According to any one of claims 1 and 2,
An upper ground settlement-reducing loop steel pipe, characterized in that it further includes a side hole edge reinforcing plate corresponding to a ring-shaped reinforcing plate having a predetermined width to surround the inner side of the steel pipe of the side hole for the loop steel pipe leading pipe. According to any one of claims 1 and 2,
It is characterized in that it further includes an upper ground settlement prevention plate having a predetermined width and length and having the same curvature as the steel pipe so as to slightly protrude from the upper part of the front part of the leading steel pipe, which is first installed forward of the steel pipe in the longitudinal direction of the steel pipe. Upper ground settlement-reducing loop steel pipe. In constructing a pipe loop in the ground crossing underground in a shallow top cover for a typical road or railroad,
A process of manufacturing and installing a conventional propulsion table including a reaction pile and a reaction wall;
After the process of manufacturing and installing the propulsion base, a pipe loop is formed by continuously connecting the end flanges of the upper ground settlement reduction loop steel pipe and press-fitting them, and forming a pipe loop inside the upper ground settlement reduction loop steel pipe and the upper ground settlement reduction loop. A process of excavating ground soil in the confined space between the outside of the steel pipe and the end binding flange and simultaneously pushing the upper ground settlement-reducing loop steel pipe forward and pushing it forward;
After the process of press-fitting and propelling the upper ground settlement-reducing roof steel pipe forward, a process of installing reinforcing bars through reinforcing bar insertion holes in a direction perpendicular to the longitudinal direction of the steel pipe;
After the step of installing the reinforcing bars, a process of curing the inside of the upper ground settlement reduction type loop steel pipe and the inside of the confined space between the outside of the upper ground settlement reduction type loop steel pipe and the end binding flange with filler;
After the process of filling and curing the filler, a process of excavating the soil and soil inside the pipe loop formed by continuously binding the upper ground settlement reduction loop steel pipe;
A process of constructing a waterproof finishing hole on the inner surface of the pipe loop after excavating the ground soil inside the pipe loop;
A pipe loop construction method using an upper ground settlement-reducing loop steel pipe, characterized in that it consists of. In clause 7,
After the process of manufacturing and installing the propulsion base, the end binding flanges of the upper ground settlement reduction type loop steel pipe are continuously connected and press-fitted to form a pipe loop, and the inside of the upper ground settlement reduction type loop steel pipe and the upper ground settlement reduction type loop steel pipe are formed. A process of excavating ground soil within the confined space between the outside of the and the end binding flanges and simultaneously pushing the upper ground settlement-reducing loop steel pipe forward and pushing it forward; cast
The ends of the upper subsidence-reducing loop steel pipe are connected to each other continuously to form a pipe loop by press-fitting the flanges, and the inside of the upper subsidence-reducing loop steel pipe and the outside of the upper subsidence-reducing loop steel pipe are combined in parallel with the upper and lower steel pipes. A process of excavating ground soil in the confined space between the mold flange and the upper and lower end binding flanges and simultaneously pushing and pushing the upper ground settlement reduction type loop steel pipe forward;
A pipe loop construction method using an upper ground settlement-reducing roof steel pipe, characterized in that it is replaced by . According to any one of claims 7 to 8,
A pipe loop construction method using an upper ground settlement reduction roof steel pipe, characterized in that a main body structure is further included and installed inside the waterproof finishing hole after the process of constructing a waterproof finishing hole targeting the inner surface of the pipe loop. According to any one of claims 7 to 8,
A process of installing a crescent-shaped form further included in the lower part of the upper ground settlement reduction loop steel pipe after the process of installing the reinforcing bar;
After the process of filling and curing the filler, the lower part of the upper ground settlement reduction type loop steel pipe with a height corresponding to less than the height of the lower end binding type flange or less than the height of the lower steel pipe parallel combination type flange is shaped like a crescent moon. A process of cutting and removing, including the formwork; cast
A pipe loop construction method using an upper ground settlement-reducing loop steel pipe, characterized in that it further includes.