KR20080101855A - Underground Structure Construction Method Using Underground Indentation - Google Patents

Abstract

The present invention is to construct an underground structure, such as an underground driveway or underground tunnel, so that the inclined gradient is formed on the top plate and the outer plate of the underground indentation, to prevent the formation of a step on the lower surface of the top plate to form a horizontal plane The present invention relates to a method for constructing underground structures using underground indentation.

According to the present invention, the guide means is installed on both sides of the underground indentation after the upper underground indentation is adjacent to the upper underground indentation to secure the straightness between the upper underground indentation and the adjacent upper indentation. In addition, the lower plate of the above-mentioned underground indentation and the lower plate of the adjacent upper underground indentation are located on the same line, so that the ceiling aesthetics of the finished underground structure can be maintained well, and it is generated inside the underground structure. As a result of this condensation, an excellent effect is obtained which effectively prevents the collection of moisture in the center of the ceiling. In addition, the present invention can effectively prevent damage and subsidence of the underground structure even when the underground structure is installed on the soft ground, it is structurally strong and can obtain an excellent effect to build the underground structure in a stable form.

Description

Underground Structure Construction Method Using Underground Indentation {UNDERGROUND STRUCTURE CONSTRUCTION BY USING UNDERGROUND STEEL INSERTS}

The present invention relates to a method for constructing underground structures using underground indents capable of straightness and induction drainage. More specifically, the present invention relates to a method of forcing a large number of underground indents in order to construct underground structures such as underground roadways or underground tunnels. Arbitrary inclination gradient is formed on the upper plate and outer plate of the middle indentation, and the lower surface of the middle plate prevents the formation of a step to form a horizontal plane, and when the underground structure is installed on the soft ground, the underground indentation is added below. The present invention relates to a method for constructing underground structures using underground indentation, which is installed to prevent damage and settlement of underground structures.

Representative non-adhesive underground structure construction methods that are currently applied universally include a pulley prosthesis method, a steel pipe cross-section loop method, and an NTR method.

First of all, in the case of the ship towing artificial method, the cross section of the pipe for supporting the small-diameter box is horizontally press-fitted through the ground to pass through the box, and then a plurality of PC steel wires that cross the ground are combined with the box manufactured in the field and then towed. This method is to remove the internal soil inside the enclosure and to install the structure in the ground by repeating such towing and excavation work. This method is a temporary steel pipe due to construction error that occurred during horizontal press-in of the propeller and steel pipe section during the propulsion of the vessel. There is a risk of settlement on the road or obstacles in the upper part of the enclosure as much as the gap with the cross section. Also, since the enclosure is pre-fabricated and installed towing, if the upper toffee is deep, the member dimensions forming the enclosure become large and the traction becomes difficult. Because of its large scale, its applicability in deep underground spaces is slim.

The steel pipe loop method press-connects small steel pipes for temporary construction in the ground where the structure is to be formed in advance, forms a steel pipe loop, installs supporting beams and temporary columns while removing the internal soil inside the steel pipe loop, The concrete is built by pouring concrete. Therefore, when the upper toffee is deep, firstly, temporary materials such as steel pipe loops and support beams need to support the upper load, thereby increasing the size of the temporary facility.

NTR method (New Tubular Roof Method) is a method disclosed in the Republic of Korea Patent No. 217845 (new construction method of the structure in the unopened underground), which is first press-in spaced apart steel pipe in the cross-sectional shape of the underground structure. Next, in order to prevent leakage and sedimentation collapse at the upper part of the steel pipe and the steel pipe, a grouting part is formed by using a small diameter pipe, and an inner column is installed to reinforce the steel pipe and cut the side of the pressurized steel pipe. After that, by connecting the steel pipe and the steel pipe to each other with a connecting steel plate, by filling the concrete to form an outer casting portion made of concrete steel pipe surrounding the outside of the underground structure.

In addition, in addition to excavating the ground (inside soil) inside the outer column portion, a specific type of underground structure is installed together with the outer column portion. These underground structures can be installed as a kind of reinforced concrete structure.

The NTR method has the advantage that it can be waterproofed, which can be the biggest problem in the maintenance of underground structures, but this also means that water leakage is prevented over time, and a separate grouting part must be formed for waterproofing. Therefore, the construction is complicated, and the reinforcing work of the steel pipes such as the incision of the steel pipe side wall part and the repeated connection steel plate installation for the continuous internal space and the installation of the inner circumference inside the steel pipe, and the formwork for installing the underground structure inside the outer heat pipe part Since many complicated operations must be performed in a narrow space such as reinforcing steel installation and concrete placing, there is a problem that quality control is not easy and construction is very low and construction cost is quite expensive.

In order to improve such a problem, there has been proposed by the present inventors an underground structure construction method which can secure the straightness so that the underground indenters are not isolated or separated from each other when the adjacent indentation is indented after any one of the indentation.

The conventional underground structure construction method using the underground indentation, which is capable of linearity and induction drainage, is a structure capable of inducing drainage that can fundamentally solve the leakage problem, which is the biggest problem in maintenance after construction of underground structures. By optimizing the cross-sectional shape of the indented body indented in the simplification, and making the underground indentation itself to function as a structure, it is possible to drastically reduce the work type, so it is excellent in workability and more economical to construct underground structures. to be.

The conventional underground structure construction method related to this will be briefly described with reference to FIGS. 1 to 3.

First, the conventional underground structure construction method (1) in the continuous continuous indentation of the plurality of upper and lower underground indenters (10, 20) constituting the final underground structure cross section as shown in Figure 1a and 1b in the longitudinal direction, construction In order to secure the working space for the segment underground indentation construction in the viewpoint (A), the ground is excavated vertically, and the ground is also vertically excavated at the end point (B) of the construction according to the extension length of the underground structure. The construction starting point (A) and the end point (B) for the indentation work of the lower underground indentation is formed first.

In particular, the construction time point (A) is provided with a pressing means (hydraulic jack, 42) and a reaction force 44 for pressurizing the upper and lower underground indentation, the inner side is provided with a temporary facility 46 including a temporary copper bar. .

Accordingly, as shown in FIG. 1A, the first underground indentation body 10 having the leading underground indentation body 14 is first press-fitted, and the upper segment underground indentation body 10a is repeatedly inserted into the rear surface of the first underground indentation body 10 which is first press-fitted. While connecting the to be pressed in the longitudinal direction (excavation direction) to the final construction end portion (B).

Next, as shown in FIG. 1B, a plurality of lower segment underground indenters 20a are connected to each other in contact with the bottom surface of the upper underground indenter 10 in the already indented state so that the lower underground indenter 20 may be formed. The lower underground indenter 20 can be press-fitted in the longitudinal direction (excavation direction) to the final end point B while partially dismantling the temporary facility.

1A and 1B as described above, it can be seen that an underground structure having a non-closed rectangular cross section or a circular cross section having an open lower portion as shown in cross section in FIGS. 2A and 2B may be installed. . However, such a cross-sectional shape is for illustrative purposes only and may be configured in various other various cross-sectional shapes.

For example, closed rectangular cross section, closed circular shape, non-closed arch shape, non-closed polygonal shape, underground structure cross-section of horseshoe-shaped cross section, and underground structure cross-sectional shape in non-closed square cross-sectional shape. It can be used when the excavation width is large as it is configured to additionally form an underground indentation in the central portion.

In addition, it is possible to install the underground structure in various cross-sectional forms of other forms, and this is sufficiently possible by changing the shape of the upper and lower underground indents, so such a conventional technique is applicable to various installation forms of the underground structure. It can be seen that it can be extended.

2A and 2B, the underground structure is largely composed of an upper underground indentation 10 and a lower underground indentation 20, and the upper underground indentation 10 includes a central upper underground indentation ( 11) and the two side upper underground indents 12 and 13 are formed so as to be in contact with each other and protruded laterally, the lower underground indentation 20 on both sides is the side upper underground indents (12, 13) It is formed so that it is inscribed with each other on the bottom surface.

Particularly, the upper plates 12a and 13a of the upper side underground indents 12 and 13 on both sides than the upper plate 11a of the central upper indentation 11 form a step on the lower side and are coupled to each other. ) Top plate 11a is formed higher than the top plate 12a, 13a of the upper side underground indentation (12, 13) on both sides so that the water flows naturally without additional means based on the center portion Directional gradients (see arrows) are formed. Therefore, it becomes a kind of inclined roof, and preferably has a slope of about 1% to 2%.

In addition, the lower plate 11b of the central upper underground indenter 11 also forms a step lower than the lower plates 12b and 13b of both side upper indenters 12 and 13 and is coupled to the lower plate of the upper underground indenter 11. The structure 11b is formed lower than the lower plates 12b and 13b of the two upper underground indenting bodies 12 and 13.

On the other hand, such underground structures are press-fitted into the ground, and as shown in FIG. 3A, each of the underground pushers may be in communication with each other by cutting the inner outer plates in contact with each other in the upper and lower underground pushers 10 and 20. Make sure Each of the underground indentations by the cutting of the outer plate is to be structurally integrated with each other through the connecting plate 60 and to prevent the concrete from leaking when placing concrete.

Although each underground indentation is not shown, when the reinforcement is installed in the form of steel or trusses therein, the steel and trusses can be connected to each other. It is also possible to install the sheath tube to insert the steel frame, tendon inside the prestress may be introduced.

Then, after filling the interior filling material 70 including concrete to fill each segment underground indentation structurally integrated with each other through the connecting plate 60, and curing, if the steel box and concrete Are synthesized with each other, so that the cross section of the final underground structure can be completed, and a stud for complementing the synthesizing action can be installed on the inner surface of the indentation body.

In addition, the inner structure of the underground structure 80 is excavated to form the inner space of the underground structure in the longitudinal direction. At this time, the underground structure lower plate 90 is to be additionally formed as a reinforcement 91 concrete (RC structure), or steel concrete (SRC structure) structure.

However, in the conventional underground structure as described above, when constructing a structure such as an underground roadway or an underground tunnel, the lower plate 11b of the central upper underground indent 11 is the lower plate of both upper underground indents 12 and 13 ( Since the lower plate 11b of the upper underground indenter 11 is formed lower than the lower plates 12b and 13b of both sides of the upper underground indenter 12 and 13 by forming a step lower than 12b and 13b. It greatly damages the internal aesthetics of the final underground structure, and condensation moisture generated inside the underground structure is collected at the center of the ceiling. Therefore, there is a need to improve the ceiling shape of the underground structure.

In addition, in the case of underground structures constructed through such a conventional underground structure construction method, when the construction on the soft ground is likely to occur damage and settlement of the underground structure, a new improvement to prevent this is required.

The present invention is to solve the conventional problems as described above, the purpose is to construct a subterranean structure by forcing a number of underground indentation in order to construct an underground structure, such as an underground road or underground tunnel, Random slopes are formed on the upper and outer plates to allow drainage to be made, to ensure straightness during underground indentation, and to maintain good aesthetic appearance of the finished underground structure, as well as The present invention provides a method for constructing underground structures using underground indentation, which prevents condensation from occurring inside the ceiling.

Another object of the present invention is to provide a method for constructing underground structures using underground indentation, which effectively prevents damage and settlement of underground structures even when the underground structures are installed on soft ground.

In addition, another object of the present invention is to provide a method of construction of underground structures using underground presses reinforced to build underground structures in a stable form when the underground presses are press-fitted into the ground.

In order to achieve the above object, the present invention is configured as follows.

According to the present invention, the underground indentation including the upper and lower underground indents is sequentially indented in the longitudinal direction, and then the excavated soil is disposed of, and the underground structure is formed by forming an internal filling material including concrete. Presses a central line upper indented body, and in turn injects a plurality of later upper indented bodies adjacent to both sides in the longitudinal direction, and then contacts the lower underground indented body to contact both lower surfaces of the upper indented body Presses sequentially in the longitudinal direction, and the upper upper underground indents and the upper upper underground indents are respectively open at the front and rear, and both the outer side plates and the outer side surfaces of the upper plate and the upper plate end portion extending downward. It is composed of a box having a lower plate formed in the sedimentation, and when the upper upper indentation and the upper upper indentation is press-fitted Guide means are installed on both sides of the upper underground indentation so as not to be separated from each other, thereby ensuring linearity between the upper upper indentation body and the adjacent upper indentation body, and the guide means includes the upper upper indentation body; The protruding top plates of the upper underground indents adjacent to each other overlap each other up and down, and the guide members protrude upward and downward on the outer upper plates of the line upper indents and the later upper indents, respectively. The bottom and bottom plates of the line and the post-indentation body are placed to be on the same line as each other. Through such a structure, not only the ceiling aesthetics of the finished underground structure can be maintained well, but also condensation moisture generated inside the underground structure can be effectively prevented from gathering in the center of the ceiling.

And the present invention preferably the underground structure damages the underground structure in the soft ground by including the step of installing a lower underground indentation for the improvement of the soft ground separate from the upper upper underground indentation and the later upper underground indentation And settling can be effectively prevented.

In addition, the present invention preferably is the step of installing the lower underground indentation for the improvement of the soft ground can be made of a structure in which a plurality of the bottom side of the underground structure is connected to each other laterally connected further structurally reinforce the soft ground It can effectively prevent damage and settlement of the structure.

And the present invention is preferably the step of indenting the underground indentation is made after the structural reinforcement by mounting the reinforcing member made of the section steel member in the inner circumferential direction of each of the underground indentation, and structurally solid during the underground installation work Form deformation can be prevented and the effect of constructing the underground structure in a stable form is obtained.

In another aspect, the present invention preferably indents each of the underground indenters and then internally communicates with each other, connects them to each other by on-site welding, and then integrates the internal indenters with each other by pouring internal fillers. And stabilize the ground.

And the present invention preferably comprises the step of installing the internal filling material in each of the underground indentation, the step of installing the basement floor and supporting pillars to complete the underground structure of the desired form, such as underground roadway or underground tunnel do.

According to the present invention, when the upper underground indentation is adjacent to the upper underground indentation, guide means are installed on both sides of the underground indentation to secure the straightness between the upper underground indentation after adjoining the upper indentation. Can be. At the same time, since the guide means allows the lower plate of the above-mentioned underground indentation and the lower plate of the upper underground indentation adjacent thereto to be located on the same line as each other, it is possible to maintain a good ceiling aesthetics of the final underground structure. Condensation generated inside the underground structure can be effectively prevented from collecting in the center of the ceiling.

According to the present invention, when the underground structure is installed on the soft ground, damage and settlement of the underground structure on the soft ground are additionally installed due to the addition of the downward underground indentation for the improvement of the soft ground separate from the upper underground and the lower underground compact. This can effectively prevent.

In addition, according to the present invention, in the case of press-installing the underground indentation in the ground, the underground indentations are structurally strengthened by mounting the reinforcement made of the shape steel member in the circumferential direction, respectively, so that it is structurally strong and forms during the underground installation work. The deformation is prevented and the effect of constructing the underground structure in a stable form is obtained.

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

As shown in FIG. 4, the method for constructing underground structures using the underground indentation according to the present invention sequentially shows the underground indentation including the upper and lower underground indentations 110 and 210 in the longitudinal direction (the excavation direction). Indenting.

First, the upper underground indenter 110 and the lower underground indenter 210 are press-fitted. In this case, the upper underground indenter 110 is first press-in-completed, followed by the lower underground indenter 210. .

The upper underground indentation 110 and the lower underground indentation 210 are each made of a box body whose front and rear surfaces are open, respectively, when the upper underground indentation 110 is press-installed, first, the upper line of the center line The intermediate indenter 120 is press-fitted, and the upper underground indenters 140 are indented after being adjacent to both sides thereof in turn.

Accordingly, as shown in FIG. 4, the upper upper underground indenter 120 and the upper upper indenter 140 are the upper plate 124 and the upper upper indenter 140 of the upper upper indenter 120. The upper plate 144 of the adjacent, the lower plate 122 of the upper line underground indentation 120 and the lower plate 142 of the later upper underground indentation 140 is adjacent, The outer plate 126 and both outer plates 146 of the later upper underground indenter 140 are adjacent to each other.

In such a coupling structure, each line, so as not to be isolated or separated from each other, between the upper upper underground indentation 120 and the rear upper underground indentation 140 or between the upper upper indentation 140 adjacent to each other, The guide means 150 is installed on both sides of the upper upper indented body 120 and 140, so that the linearity between the upper upper indented body 120 and the rear upper indented body 140 adjacent thereto or the upper upper indented body 140 Secure straightness between each other.

The above-mentioned upper underground indentation 120 and the rear upper underground indentation 140 form a construction start point and an end point at the work site as in the prior art shown in FIGS. Injecting means (hydraulic jack) and a reaction table for press-fitting them, and by repeatedly connecting the segment underground indenting body (120a, 140a) in turn in the longitudinal direction (excavation direction) to the final construction end point.

In this process, the lower plate 122 of the upper underground indentation 120 and the lower plate 142 of the upper underground indentation 140 adjacent thereto by the guide means 150 are on the same line H. Placed and placed.

To this end, the guide means 150 is as shown in Figs. 4 and 5, the upper plate (120, 144) of the upper upper underground indentation 120 and the rear upper underground indentation 140 of both sides adjacent thereto, respectively, The upper plate 124 of the above-mentioned top underground indenter 120 is formed to form a step (P) higher than the top plate 144 of the rear top underground indenter 140 on both sides. Thus, the top plate 124 of the line top underground indentation 120 is formed higher than the top plate 144 of the top underground indentation 140 after both sides, so that no flow of water is added based on the central part. Transverse gradients (see arrows) are formed to flow naturally. Therefore, the top plate 124 of the line top underground indentation 120 and the top plate 144 of the rear top underground indentation 140 on both sides thereof are adjacent to each other to serve as a kind of inclined roof, 1% as in the prior art A gradient of about 2% is formed.

In addition, the guide means 150 is a guide member 152, 154 of reinforcing bars, circular steel bars or angles up and down on the outer plate (126, 146) adjacent to each other of the line top underground indentation 120 and the post top underground indentation 140, respectively Are projected, and these guide members 152 and 154 are arranged to overlap each other up and down, and in this case, the lower plate 122 of the line upper indented body 120 and the upper upper indented body 140 adjacent thereto. The lower plate 142 of) is positioned on the same line (H) to each other.

Therefore, if the lower plate 122 of the upper line underground indentation 120 and the lower plate 142 of the upper underground indentation 140 adjacent to each other are located on the same line H and are finally completed, Not only can the ceiling aesthetics of the structure 300 be well maintained, but moisture condensation generated inside the underground structure 300 can be effectively prevented from being collected in the center of the ceiling.

Meanwhile, in FIG. 5, the lower plate 142 of the rear upper underground indenter 140 is formed on the outer plate 126 of the line upper underground indenter 120 by forming a protrusion 156 instead of the guide member 152 on the side. By adjoining the guide member 154, it can be seen that the protrusion 156 formed on the lower plate 142 of the upper upper indentation body 140 serves as another guide member.

As shown in FIG. 5 in the process of constructing the underground structure 300 as described above, the size of the line below the top underground indentation 120 can be formed larger than the above top underground indentation 140, as described above By increasing the upper line of the underground indentation 120, the cross-section of the underground structure 300 is strengthened structurally it is possible to build a more stable structure. After the construction of the upper underground indentation 110 is performed in this way, the lower underground indentation 210 is subsequently press-fitted in succession to both lower portions of the upper underground indentation 110 to build the underground structure 300.

In addition, the present invention as shown in Figure 6, the guide means 150 is effectively applied to the cross-section of the underground structure 300 in the form of a non-closed tunnel arch (Arch), the ceiling of the finally completed underground structure 300 Aesthetics can be kept good and condensation can be effectively prevented from condensation.

Meanwhile, the present invention constructs the underground structure 300 through the above-mentioned upper underground indentation 120 and the later upper underground indentation 140, and when such an underground structure 300 is constructed in the soft ground. And further installing a downward underground indentation (250).

For example, as shown in FIGS. 7A and 7B, the underground structure 300 is a lower underground indentation for soft ground improvement separately from the upper upper underground indentation 120 and the later upper underground indentation 140, respectively. Additional construction 250 is included.

One such lower ground underground indentation for improving the ground can be installed in one of the lower center of the underground structure 300, as shown in Figure 7a, or alternatively, as shown in Figure 7b, multiple at regular intervals Can be installed in the lower portion of the underground structure (300).

In addition, as shown in Figure 7c, the soft ground improvement downward underground indentation 250 may be made of a structure in which a plurality of the bottom side of the underground structure 300 is connected to each other laterally. In this case, each of the upper underground plates 254a of both side downward underground indents 254 is lower than the upper underground plates 252a of the central lower underground indents 252, respectively. (P) is formed and coupled, and the lower plate 252b of the central downwardly indented body 252 also forms a step P lower than the lower plate 254b of the both side downwardly indented body 254 and is coupled to these Adjacent downward underground indentations 250 are fitted to each other and are coupled while ensuring straightness, and as a result, both ends thereof are connected to the bottom of the lower underground indenters 210 of the underground structure 300. .

Therefore, it is possible to secure the bearing capacity of the underground structure 300 to the width / ground in the soft ground through such a soft ground improvement downward underground indentation (250) so that the settlement of the underground structure 300 does not occur after construction do.

After the installation of the underground structure 300, the filling material 280, for example, concrete is poured into the upper underground press body 110, the lower underground press body 210, and the lower underground press body 250. Steps. At this time, by cutting the inner outer plate in contact with each other in the upper, lower underground indentation 210 and the lower underground indentation for improving the soft ground 250 so that the internal space of each underground indentation can communicate with each other.

As such, after communicating the internal space, each of the underground indenters 110 and 210 adjacent to each other may be connected to each other by field welding (W), as shown in FIG. 8. Through each of the underground indenters (110, 210) can be structurally stabilized by integrating with each other.

In addition, each of the underground indentations (110,210) by the cutting of the outer plate is to be structurally integrated with each other through the connecting plate 270 as in the prior art when placing the inner filler 280 containing concrete, the concrete to the outside To prevent leakage. In this way, if the curing after the filling of the internal filler 280, the steel box and concrete is synthesized with each other, the cross section of the final underground structure 300 can be completed.

Next, as shown in FIG. 9, the inner soil 282 of the underground structure 300 is excavated to form an inner space of the underground structure 300 in the longitudinal direction, and finally, the underground structure bottom 290. And installing the support pillar 292.

Meanwhile, as illustrated in FIGS. 7A and 7B, the underground structure floor 290 may be formed of reinforced concrete (RC structure) or steel concrete (SRC structure) structure, and the plurality of underground structure floors 290 may be formed. In the case as illustrated in FIG. 7C in which the lower underfloor indentation 250 for soft ground improvement is installed, it is not necessary to separately form the bottom 290.

And when excavating all of the inner soil 282 of the underground structure 300, the inner surface of the underground structure 300 is exposed as it is, for finishing the inner exposed surface of the finishing concrete layer such as additional shot concrete It can also form more.

On the other hand, each of the underground indentation (110, 210, 250) may include a step of structurally strengthening by mounting the reinforcing member 296 made of a shaped steel member in the inner circumferential direction of the cross section.

Such a structure is shown throughout FIGS. 10A-10D.

That is, the underground indents 110, 210 and 250 are structurally firmly reinforced by mounting a section steel member having a "" section on the inner surface of the cross section as a reinforcing material 296, and effectively resisting the resistance received from earth pressure during underground indentation without structural deformation. 300 can be formed.

As described above, the underground structure construction method 100 using the underground indentation according to the present invention, as shown in FIGS. 1A and 1B, first, using a plurality of upper underground indentations 110 using a pressurization means such as a hydraulic jack. The bottom underground indenting body 210 is press-fitted into the ground, for example, to form a non-closed rectangular cross section or a circular cross-section with an open bottom, or a closed rectangular cross-sectional shape, a closed round shape, a non-closed arch ( The arch structure, a non-closed polygonal shape, a horseshoe-shaped cross-sectional shape, a non-closed rectangular cross-sectional shape to build the underground structure (300).

In this process, the upper underground indentation 110 is formed by the guide means 150 installed in the upper upper underground indentation 120 and the later upper underground indentation 140. The centers of the upper plates 124 and 144 are high and have low structures toward both sides, thereby forming a lateral gradient of about 1% to 2%.

In addition, the guide means 150 is arranged so that the lower plate 122 of the upper underground indentation 120 and the lower plate 142 of the upper underground indentation 140 adjacent thereto are disposed on the same line H as each other. By doing so, not only can the ceiling aesthetics of the finally completed underground structure 300 be maintained well, but condensation moisture generated inside the underground structure 300 can be effectively prevented from being collected in the center of the ceiling.

As described above, if the underground structure 300 installed in accordance with the present invention is installed in the soft ground, the method further includes installing a downward underground indentation 250 in the underground structure 300, as shown in FIGS. 7A and 7B. As shown in the lower portion of the central structure 300, one or a plurality at regular intervals, or as shown in Figure 7c to install a plurality of underground underground pressure injectors 250 for improving the soft ground underground structure ( It can be installed in a structure that connects the lower both ends of the 300) laterally connected to each other.

And in the process of building such an underground structure 300, the size of the upper line underground indentation 120 can be formed larger than the upper underground indentation 140, as described above, in the middle of the upper line underground indentation 120 Increasing the width of the structure to strengthen the cross section of the underground structure 300 it is possible to build a more stable structure.

In addition, after constructing the underground structure 300 by using the upper underground indentation 110, the lower underground indentation 210, and the lower underground indentation 250, the interior of these underground indentations 110, 210, and 250 is then used. After filling the concrete as a filler 280 to structurally stabilize, excavate the inner soil 282 of the underground structure 300, and installs the underground structure floor 290 and the support pillars 292 step by step.

As described above, the underground structure construction method 100 using the underground indentation according to the present invention is when the upper underground indentation 120 and the upper underground indentation 140 adjacent thereto are press-fitted to each other. The guide means 150 may be installed on both side surfaces of the middle indentation body 120 and 140 to secure the straightness between the upper underground indentation body 120 and the adjacent upper indentation body 140.

At the same time, the guide means 150 is such that the lower plate 122 of the upper line underground indentation 120 and the lower plate 142 of the upper upper indentation 140 adjacent thereto are located on the same line (H). Not only can the ceiling aesthetics of the finally completed underground structure 300 be maintained well, but condensation moisture generated inside the underground structure 300 is effectively prevented from gathering in the center of the ceiling.

In addition, the present invention, when such an underground structure 300 is installed on the soft ground, and further added to the lower underground pressure injectors for improving the soft ground separate from the upper underground indentation 110 and the lower underground indentation (210) Since the installation will be able to effectively prevent damage and settlement of the underground structure 300 in the soft ground.

In addition, the upper underground indentation 110, the lower underground indentation 210, and the lower underground indentation for improving the soft ground 250 are structurally mounted in the cross-sectional inner circumferential direction of the reinforcing member 296 made of a steel member inside, respectively. Since it is reinforced by the structural structure and press-installed the underground indentation (110, 210, 250) in the ground, the form deformation due to earth pressure (효과적으로) is effectively prevented it is possible to build the underground structure 300 in a stable form .

An embodiment of the present invention described above and illustrated in the drawings should not be construed as limiting the technical spirit of the present invention. The protection scope of the present invention is limited only by the matters described in the claims, and those skilled in the art can change and change the technical idea of the present invention in various forms. Therefore, such improvements and modifications fall within the protection scope of the present invention as long as it will be apparent to those skilled in the art.

1A and 1B show a schematic construction state diagram of a method for constructing an underground structure using underground indentation according to the related art.

Figure 2 is a cross-sectional view of the underground structure obtained by the underground structure construction method using the underground indentation according to the prior art, a is a non-closed rectangular cross-sectional structure of the lower opening, b is a structure of the tunnel arch cross-section.

Figure 3 is a cross-sectional view of the underground structure of the intermediate process in the underground structure construction method using the underground pressure in accordance with the prior art, a is a structure in which the outer plate is cut so that the inside of the underground indent communicates, b is a underground indent This is the case with the concrete filling inside.

Figure 4 is a cross-sectional view showing a structure in which the lower plate of the upper underground indentation is located on the same line by the guide means in the underground structure construction method using the underground indentation according to the present invention.

Figure 5 is a cross-sectional view showing that the structure of the underground structure construction method using the underground indentation in accordance with the present invention has a larger structure than the upper upper underground indentation on both sides.

6 is a cross-sectional view showing a structure in which the cross section of the underground structure has a tunnel arch shape in the underground structure construction method using the underground pressurized body according to the present invention.

7 is a view showing a structure in which a downward underground indentation method is installed in the underground structure construction method using underground pressure in accordance with the present invention, a is a structure is installed in the lower part of the center, b is a plurality of installed at a predetermined interval in the lower center The structure c is a structure in which a plurality of structures are installed in succession.

8 is an enlarged cross-sectional view illustrating a top plate connecting structure between underground presses in the underground structure construction method using underground presses according to the present invention.

Figure 9 is a cross-sectional view showing an underground structure constructed by using the underground structure construction method using the underground pressurized body according to the present invention.

10 is a view showing in detail the reinforcement to be installed in the underground indentation method in the underground structure construction method using the underground indentation according to the present invention,

Fig. 1a is a cross-sectional view of the indentation body, b is a section A-A, c is a section B-B, and d is a section C-C.

<Description of Symbols for Major Parts of Drawings>

1 ..... Conventional underground structure construction method

10 .... upper subterranean body 10a .... upper segment subterranean body

11 ..... Central upper underground indents 11a, 12a, 13a ....

11b, 12b, 13b .... Bottom 12,13 ..... Lateral upper subterranean

14 ..... Leading Indented Body 20 ..... Lower Indented Body

20a .... Lower Segment Underpressure 3 ... 42 ..... Hydraulic Jack

44 ..... Reaction Force 46 .....

60 ..... Connecting plate 70 ..... Internal filling

80 ..... Inner soil of underground structure 90 ..... Underground structure

91 ..... Rebar 100 .... Construction method of underground structures using underground indentation

110 .... Upper Indentation 120 .... Upper Indentation

120a, 140a .... Segment Underpressure Indentation 122,142,252b, 254b .... Bottom Plate

124,144,252a, 254a .... top 126,146 .... outer plate

140 .... after the upper pneumatic 150 ..... guide means

152,154 ..... guide member 156 .... protrusion

210 ..... Lower Underground Indentation 250 ..... Underground Underdentation

252 ..... Central Downward Indentation 254 ..... Both Side Downward Indentation

270 ..... Connecting Material 280 .... Filling Material

283 ..... Inner soil 290 .... Underground structure floor

292 ..... support pillar 300 ..... underground structure

A ..... Construction B ..... Terminal

H .... on the same line P .....

W ..... Welding

Claims (6)

After pressing the underground indentation including the upper and lower underground indentation in the longitudinal direction sequentially, excavating the excavated soil, and forming an internal filler including concrete to construct the underground structure, the upper underground indentation Indenting a line upper indentation, and in turn longitudinally injecting a plurality of later upper indentations adjoining both sides thereof in a longitudinal direction, and vertically infering the lower indentation in contact with both lower surfaces of the upper indentation Indented sequentially The upper upper subterranean indentation and the upper upper subterranean indentation are each formed of a box having a front plate and a rear panel, each having an outer plate extending downward in the upper side and the upper end side of the upper plate, and a lower plate formed on the lower surface of the outer plate. When the upper upper indenter and the upper upper indenter are press-fitted, the guide means are installed on both sides of the upper indented body so as not to be separated from each other or separated from each other. To ensure the straightness between the three-dimensional, The guide means may be in contact with the upper upper underground indentation, and the adjacent upper protruding upper plates of the upper underground indentation overlap each other up and down, and the adjacent outer plates of the upper upper indentation and the upper upper indentation. The guide members protrude upward and downward, respectively, and are disposed to overlap each other up and down, and the bottom and bottom plates of the above-mentioned upper and lower underground indentation bodies are disposed to be located on the same line as each other. Underground structure construction method using. The method of claim 1, wherein the underground structure is characterized in that it comprises the step of pressurizing the bottom underground indentation and the upper top underground indentation, and then additionally indenting a separate subterranean indentation for the improvement of soft ground. Underground structure construction method using underground indentation. The method of claim 2, wherein the step of additionally indenting the lower underground indentation for the improvement of the soft ground is characterized in that it is made to connect the plurality of lower underground indenters laterally connected to both sides of the underground structure laterally. Underground structure construction method using. According to any one of claims 1 to 3, wherein the step of indenting the underground indentation is characterized in that it is after the structural reinforcement by mounting the reinforcement made of the section steel member in the inner circumferential direction of each of the underground indentation Underground structure construction method using underground press-fit. The method according to any one of claims 1 to 3, comprising the step of indenting each of the underground indenters and then communicating the interior thereof with each other, connecting them to each other by field welding, and then pouring and integrating the internal filler. Underground structure construction method using a subterranean solid, characterized in that. 6. The method of claim 5, further comprising installing a bottom of the underground structure and supporting pillars after placing the internal filler in each of the underground indents. 7.

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