KR20210055980A - Underground roadway by top-down method using steel continuous wall in the earth without traffic control and temporary road and method for constructing the same - Google Patents

Abstract

The present invention relates to an underground roadway by a top-down method using a continuous steel wall in the ground and a construction method thereof. Up until now, both directions of a road have been simultaneously constructed by a bottom-up method or a top-down method, so it has been hard to secure the support force of a middle wall, and construction has become impossible, and the present invention aims to address the problem. In accordance with the present invention, the construction method of the underground roadway by the top-down method is able to construct an underground roadway on one side of the road by the top-down method using a continuous steel wall in the ground, and recover the road by a refilling method, so the traffic is opened and the rigidity of a structure is secured, and then the opposite side of the road is constructed by the same method. Accordingly, the present invention is able to secure the support force and rigidity of the structure, and safely perform the construction. In addition, by performing the construction by the top-down method after forming both side walls and a middle wall as a continuous steel wall in the ground to serve as a retaining wall and a water cut-off wall, the present invention is able to secure the support force and rigidity of the structure, and greatly improve the earthquake proofing against stress and earthquake. In accordance with the present invention, the support force and rigidity of the structure is secured, so the construction can be done safely and rapidly, and the construction is possible without a temporary road and traffic control, so the construction period and costs can be reduced.

Description

Underground roadway using top-down method using continuous walls that can be constructed without bypass and traffic control, and its construction method {UNDERGROUND ROADWAY BY TOP-DOWN METHOD USING STEEL CONTINUOUS WALL IN THE EARTH WITHOUT TRAFFIC CONTROL AND TEMPORARY ROAD AND METHOD FOR CONSTRUCTING THE SAME}

The present invention relates to a top-down type underground roadway and its construction method using a forced underground continuous wall, and in particular, a conventional bottom-up method or a top-down method. In order to solve the problem that construction is impossible because it is difficult to secure the supporting power of the intermediate wall in case of simultaneous construction of both sides of the road by way of the method, after constructing the underpass on one side of the road in a top-down method using a continuous wall of forced ground. By restoring the road by backfilling to open the traffic, securing the rigidity of the structure, and then constructing the opposite road in the same way, the top-down using a continuous underground wall that can be safely constructed according to securing the support and rigidity of the structure. -down) method of the underground roadway and its construction method.

In addition, the present invention secures the supporting power and rigidity of the structure by forming the left and right side walls and the intermediate wall of the underground roadway as a continuous wall of forced ground serving as a retaining wall and a barrier wall, and then constructing it in a top-down manner, The present invention relates to a top-down underground roadway that can greatly improve the seismic resistance against stress and earthquakes, and a construction method thereof.

In addition, the present invention relates to a top-down underground roadway and a construction method thereof using a forced underground continuous wall that can be constructed without bypass and traffic control and reduce construction period and construction cost.

In general, an underpass is an underground structure that is installed so as to cross a lower portion of a road or railroad so that people or vehicles can safely cross the road without interfering with the operation of vehicles running on the road or railroad. The underpass has a structure in which the walls on both sides formed at a distance from each other, the floor slab connecting the lower end of the wall, and the upper slab connecting the upper end of the wall form a box-shaped cross section, and as a lane separator for the safety of passing vehicles and the upper part. In order to reinforce the insufficient load bearing capacity of the slab, a central separation wall or a plurality of central separation pillars may be installed to connect the upper slab and the bottom slab along the passage direction.

The underpass can be post-built to cross the lower part of an existing road or railroad, or the underpass can be constructed first and then a road or railroad can be laid over it. In the former case, appropriate temporary facilities should be installed or special construction methods should be applied to prevent the subsidence of existing roads or railroads. In the latter case, build up the retaining wall and the ordering wall with H piles and earth plates or sheet piles, and excavate to the required depth while supporting the earthing wall and the ordering wall using strips and braces, and then place the floor slab, wall, and upper slab in order by using a concrete on-site method. It will be constructed as it is. At this time, the H pile and earth plate or sheet pile are temporary facilities for excavation and are removed after the construction of the underpass. In the case of underground roadways constructed using the cast-in-place method, the cost increases due to the installation and dismantling of temporary facilities and the extension of the construction period, the installation of formwork to build the floor slab, wall, and upper slab by the cast-in-place method, reinforcement assembly, concrete pouring, and There is a problem of the need for many on-site manpower and delay in construction due to curing.

In order to solve this problem, in Registration Patent No. 10-0938395 (registration date; 2010.01.15.), a steel composite concrete wall pile was installed on the side where the walls on both sides of the underground roadway are formed, and the H pile retaining wall and the order wall and cast-in-place are installed. Underground roadway using a steel-composite wall pile in which the lower slab is integrated with the wall pile by using stud bolts and moment plates welded to the lower part of the exposed steel plate formed between the steel-composite wall piles at the same time. Disclosing the construction method of

In addition, in Korean Patent Publication No. 10-2011-0132909 (published date; 2011.12.09.), the lower slab connecting the lower end of the wall and the wall on both sides formed at intervals from each other, and the upper slab connecting the upper end of the wall are box-shaped. Disclosed is an underpass and its construction method in which the structure of the joint structure of the upper and lower slabs composed of pre-cast concrete piles and the upper and lower slabs composed of cast-in-place concrete while the wall is composed of ready-made concrete piles in a cross-section underpass. have.

However, the conventional technologies including the above patent documents use a method of repairing the road by performing a larger opening than the cross section of the underpass to construct the underpass and filling it back after completing the underpass, so the amount of excavated earthwork increases and the surrounding area There is a problem that damages the environment.

In addition, since a concrete structure must be installed after cutting the road, there is a problem in that the road must be blocked and a bypass road must be secured during the construction period, and there is a problem of causing great inconvenience to traffic due to vehicle congestion in the construction section.

In addition, there is a problem that the construction period and construction cost increase due to the installation and removal of temporary facilities that support earth pressure and load, and various civil complaints arise due to noise and dust.

In addition, the construction method of forming sidewalls by inserting plate-shaped wood between H-beam piles is difficult to optimal construction because the standard and arrangement intervals and depths cannot be adjusted according to the ground, resulting in inferior economic feasibility and a risk of collapse. In addition, there are limitations in being widely applied to retaining walls of rivers, alternations of bridges, walls of underground parking lots, walls of underground passages, etc. other than underground roadways.

In addition, conventionally, since both sides of the road are simultaneously constructed in a bottom-up method or a top-down method, there is a problem that it is difficult to secure the supporting power of the structure, making construction impossible.

Republic of Korea Patent Registration No. 10-0938395 (Registration date; 2010.01.15.) Republic of Korea Patent Publication No. 10-2011-0132909 (published date; 2011.12.09.)

In order to solve the above-described problem, the technical problem to be achieved by the present invention is to open the traffic by constructing an underpass on one side of the road in a top-down method using a continuous underground wall, and then restoring the road by backfilling. By securing the rigidity of the structure and then constructing the opposite road in the same way, a top-down underground roadway and its It is to provide a construction method.

In addition, another technical problem to be achieved by the present invention is to form the left and right side walls and the intermediate wall of the underground roadway as a forced underground continuous wall serving as a retaining wall and an ordering wall, and then constructing it in a top-down manner. It is to provide a top-down type underground roadway and its construction method using a steel underground continuous wall that can secure bearing capacity and stiffness, and greatly improve the seismic resistance against stress and earthquakes.

In addition, another technical problem to be achieved by the present invention is a top-down underground roadway using a forced underground continuous wall that can be constructed without bypass and traffic control and reduce construction period and construction cost. And it is to provide a construction method thereof.

In addition, another technical problem to be achieved by the present invention is to install a precast girder as a steel bracket between the left and right walls of the underground passageway and the steel-ground continuous wall of the intermediate wall. It is to provide a top-down type underground roadway and its construction method using a continuous wall of the steel ground formed by

In addition, another technical problem to be achieved by the present invention is to combine an H-beam pile with C-type joints formed at both ends of the flange and an H-beam pile with I-type joints or T-type joints formed at both ends of the flange. A top-down underground roadway and its construction using a steel-ground continuous wall constructed by composing a continuous wall under the (central separation wall) and pouring soil-cement inside the joint material. It is in providing a way.

In addition, another technical problem to be achieved by the present invention is a top-down underground roadway and its construction method using a forced underground continuous wall in which a near-entry assistance device is installed at the end of the C-type joint of the H-beam. It is to provide.

In addition, another technical problem to be achieved by the present invention is to form a forced underground continuous wall of the left and right walls of the underground driveway and the intermediate wall (central separation wall) by connecting H-beam piles with semi-circular joints formed at both ends of the flange, and inside the joint material. It is to provide a top-down type underground roadway and its construction method using a continuous wall of a steel underground constructed by pouring soil-cement in the soil.

In addition, another technical problem to be achieved by the present invention is to connect the H-beam piles with joints in the shape of'┏┓' or'┗┛' at both ends of the flange to form a forced underground continuous wall between the left and right walls of the underground driveway and the intermediate wall. It is to provide a top-down type of underground roadway and its construction method using a continuous wall of steel underground constructed by pouring soil-cement inside the joint material.

In addition, another technical problem to be achieved by the present invention is to increase the rigidity by attaching a flange reinforcement to the outer surface of the H beam pile of the left and right walls and the intermediate wall of the underground roadway by welding to increase the rigidity, It is to provide a top-down underground roadway and its construction method using a steel underground continuous wall in which reinforcing steel is attached by welding to strengthen the shear force in the vertical direction.

In addition, another technical problem to be achieved by the present invention is to improve water resistance by attaching sealing materials (band-shaped sealing materials, irregular sealing materials, etc.) to the joints of the H-beam piles of the left and right walls of the underground roadway and the intermediate wall. It is to provide a top-down type of underground roadway and its construction method using a continuous wall of the forced underground.

In addition, another technical problem to be achieved by the present invention is to form a continuous wall of the left and right sides of the underground driveway and the forced underground wall of the intermediate wall by combining steel pipe piles with a C-shaped joint formed on one side and a circular fitting on the other side. The purpose is to provide a top-down underground roadway and its construction method using a continuous wall under the ground constructed by pouring soil-cement inside the joint material.

In addition, another technical problem to be achieved by the present invention is a top-down method using a continuous underground wall in which rigidity is secured by installing support beams between the left and right walls of the underground roadway and the steel-ground continuous wall of the intermediate wall. It is to provide the underground roadway and its construction method.

The problem of the present invention is not limited to those mentioned above, and other problems that are not mentioned will be clearly understood by those skilled in the art from the following description.

As a means for solving the above-described technical problem, the method of constructing a top-down underground roadway using a continuous wall of a forced underground according to the present invention includes (a) the left and right side walls of the underpass through linear surveying. Digging a rope and excavating a trench along the longitudinal direction of the underpass at the points of (110,130) and the intermediate wall (120); (b) By jointing a pile into the trenches of the excavated left and right side walls (110, 130) and the intermediate wall (120), continuous walls (111, 121, 131) are formed respectively, and the concrete (112) is poured into the bottom of the pile. The step of doing; (c) Excavate the ground on the left side road of the underpass according to the depth of the upper slab 160, even the bottom, and then install the precast girder 140 into the forced underground continuous wall of the left wall 110 ( 111) and the forced ground continuous wall 121 of the intermediate wall 120, and then pouring topping concrete or forming an on-site casting furnace upper slab 160 using a copper bar and a formwork, and the upper slab 160 Forming a waterproof layer 170 thereon; (d) Excavating the lower part of the precast girder 140 according to the depth of the lower slab 190, and evenly leveling the floor, and then forming a waterproof layer 180 on the upper part of the floor surface, and then pouring soil-cement. Forming a lower slab 190 and forming a left wall 110 and an intermediate wall 120; (e) covering the upper part of the upper slab 160 by backfilling and restoring the left-hand side of the ground so that the vehicle can pass; (f) Excavate the ground on the right side road of the underpass according to the depth of the upper slab 220, and evenly the floor, and then install the precast girder 200 into the forced underground continuous wall of the intermediate wall 120 ( 121) and the forced ground continuous wall 131 of the right side wall 130, and then pouring topping concrete or forming an on-site casting furnace upper slab 220 using a copper bar and a formwork, and the upper slab 220 Forming a waterproof layer 230 thereon; (g) After digging the lower part of the precast girder 200 according to the depth of the lower slab 250, and evenlying the floor, a waterproof layer 240 is formed on the upper surface of the precast girder 200, and then soil-cement is poured. Forming the lower slab 250 and constructing the right wall 130 and the intermediate wall 120 and auxiliary holes; And (h) covering the upper part of the upper slab 220 by backfilling to restore the right road above ground to enable vehicle passage, and paving the lower slabs 190 and 250 of the underpass with asphalt. Can be.

The construction method of the underpass may include an H-beam pile 270 having C-shaped joints 272 formed at both ends of the flange; H-beam pile 280 formed with I-type joints 282 at both ends of the flange; And an H-beam pile 290 having T-shaped joints 292 formed at both ends of the flange, and an I-type joint of the H-beam pile 280 on the C-shaped joint 272 of the H-beam pile 270 ( 282) or the T-shaped joint 292 of the H-beam pile 290 is jointly bonded, and then soil-cement is poured to force the left and right walls 110 and 130 and the intermediate wall 120 The underground continuous walls 111, 121, and 131 may be formed.

In the method of constructing the underpass, a funnel-shaped near-entry assistance device 330 with one side opened at the end of the C-shaped joint 272 of the H-beam pile 270 may be installed.

The construction method of the underpass is to increase the rigidity by attaching the flange reinforcement 273 to the outer surface of the H-beam piles 270, 280, 290 by welding, and attaching the shear reinforcement 275 to both inner sides of the flange by welding. Thus, the shear force in the vertical direction can be strengthened.

In the method of constructing the underpass, sealing materials 300 and 310 may be attached to the joints of the H-beam piles 270, 280, and 290 to improve water resistance.

The construction method of the underground roadway includes an H-beam pile 340 in which semi-circular joints 342 and 343 are formed in opposite directions to each other at both ends of the flange, and the semi-circular joint 342 of the H-beam pile 340 has the The left and right walls (110, 130) and the intermediate walls (110, 130) and the intermediate wall ( It is possible to configure the continuous walls 111, 121 and 131 of the forced ground 120).

The construction method of the underground roadway includes an H-beam pile 350 in which'┗┛'-type joints 352 and'┏┓'-type joints 353 are formed in opposite directions to each other at both ends of the flange, and the H-beam. After jointing the'┗┛' type joint 352 of the pile 350 with the'┏┓' type joint 353 of another H-beam pile having the same configuration as the H-beam pile 350, the soil-cement cement) can be constructed to construct the continuous walls 111, 121, and 131 of the left and right walls 110 and 130 and the intermediate wall 120.

The construction method of the underground roadway includes; a steel pipe pile 411 in which a C-type joint member 411c is formed on one side and a circular fitting member 411b is formed on the other side, and the C-type of the steel pipe pile 411 After jointing and bonding a circular fitting member 411b of another steel pipe pile having the same configuration as the steel pipe pile 411 to the joint material 411c, a soil-cement is poured to continue the forced ground of the left and right side walls (110, 130). The wall 111 and the forced ground continuous wall 121 of the intermediate wall 120 may be formed.

As a means to solve the above-described technical problem, the top-down type underground roadway using a forced underground continuous wall according to the present invention is forced by connecting piles along the length direction of the underground roadway. The left and right side walls (110, 130) and the intermediate wall (120) of the underground roadway formed by forming a continuous underground wall and pouring construction; It is constructed by excavating the left road while passing the vehicle using the right road above the ground of the underground roadway, and the continuous wall 111 of the forced underground of the left wall 110 and the continuous wall 121 of the forced ground of the intermediate wall 120 ), a precast girder 140 installed with a steel bracket 150 between, and an upper slab 160 formed by placing a topping concrete on the precast girder 140 or by on-site casting using a copper bar and a formwork, and the A waterproof layer 170 formed on the upper slab 160, a waterproof layer 180 formed on the bottom surface excavated under the precast girder 140, and a soil-cement pouring furnace on the waterproof layer 180 The formed lower slab 190, the forced ground continuous wall 111 of the left wall 110 and the left wall 110 formed by pouring soil-cement on the forced ground continuous wall 121 of the intermediate wall 120, and A left underpass with an intermediate wall 120; And the upper part of the upper slab 160 of the left underpass is covered by backfilling to restore the left road to enable vehicle passage, and then the ground on the right road is excavated to be constructed, and the right wall 130 is forced to Precast girder 200 installed with a steel bracket 210 between the underground continuous wall 131 and the forced underground continuous wall 121 of the intermediate wall 120, and the topping concrete on the precast girder 200 The upper slab 220 formed by in-situ casting using a casting furnace or copper bar and a formwork, a waterproof layer 230 formed on the upper slab 220, and the upper part of the bottom surface excavated under the precast girder 200 The waterproof layer 240 formed on the waterproof layer 240, the lower slab 250 formed by pouring soil-cement on the waterproof layer 240, the forced ground continuous wall 131 of the right wall 130 and the intermediate wall 120 It may be configured to include; a right underpass with a right wall 130 and an intermediate wall 120 formed by pouring soil-cement on the continuous wall 121 of the forced ground.

The underground roadway includes: the forced underground continuous wall (111, 121, 131) formed as a continuous wall by jointly coupling H-beam piles with joints formed at both ends of the flange; A flange reinforcement (273) that is attached to the outer surface of the flange of the H-beam pile by welding to enhance strength; A shear stiffener 275 that is attached to the inside of the flange by welding to enhance the shear force in the vertical direction; And sealing materials 300 and 310 having improved water resistance by attaching to the joint coupling portion of the H-beam pile.

According to the present invention, it is possible to safely and quickly construct an underpass without blocking the road and without obstructing vehicle traffic without opening a bypass road. Accordingly, it is possible to eliminate vehicle congestion caused by vehicle traffic restrictions when constructing an underground roadway, and to reduce the cost for securing a bypass road, thereby greatly reducing the overall construction cost.

In addition, while constructing one side of the road, the other road is used to pass the vehicle, and when one underpass is completed, the road above the underpass is restored to pass the vehicle and the other is constructed, thereby bypassing the road without blocking the road. Even without opening a road, it is possible to construct an underpass safely and quickly without interfering with vehicle traffic, and to reduce construction cost and construction period.

In addition, piles such as H beams or steel pipe piles are jointly joined to form a forced underground continuous wall to form the left and right side walls and intermediate walls of the underground roadway, and at the same time play the role of an earthen barrier and an order wall, thereby preventing the load acting on the side wall. It can increase the bearing capacity and rigidity, and greatly improve the earthquake resistance against the stress of the wall and earthquake.

In addition, by connecting steel pipes or H-beam piles in a row to form a continuous wall between the left and right walls and the wall of the central separation wall, precast girders are installed on the piles of the continuous wall as steel brackets, and topping concrete is poured or cast on site. By forming the upper slab in a method and forming the left and right walls and the central separation wall wall, construction is simple and easy, and construction period and construction cost can be reduced.

In addition, it can be widely applied and applied to retaining walls of roads and rivers, alternating bridges, walls of underground parking lots, walls of underground passages, subway box structures, waterway boxes, power outlets, communication zones, and common zones, in addition to underground roadways.

The effects of the present invention are not limited to those mentioned above, and other effects not mentioned will be clearly understood by those skilled in the art from the following description.

1 to 14 are configuration diagrams showing a construction method of a top-down type underground roadway using a continuous wall of a forced underground according to an embodiment of the present invention in order of construction.
15 to 29 are views showing an embodiment of a left and right side wall pile and an intermediate wall pile,
15 is a configuration diagram of the first embodiment of the wall pile 270,
16 is a configuration diagram of the second embodiment of the wall pile 280,
17 is a configuration diagram of the third embodiment of the wall pile 290,
18 is a configuration diagram showing the joint coupling of the wall piles (270, 280),
19 is a configuration diagram showing the joint coupling of the wall piles (270,290),
20 and 21 are configuration diagrams showing an example of attaching the flange reinforcement material 273 to the outer surface of the flange of the wall pile 270,
22 is a configuration diagram showing an example in which a flange stiffener 273 is attached to the flange outer and inner surfaces of the wall pile 270 and a sealing material is formed on the flange surface and the web surface,
23 is a configuration diagram showing an example of attaching the shear stiffener 275 to the inside of the flange of the wall pile 270,
24 and 25 are configuration diagrams showing an example in which sealing materials 300 and 310 are attached to the joints of the wall piles 270 and 280 to improve the water resistance,
FIG. 26 is a configuration diagram showing the joint part 320 of the wall piles 270 and 280 and the near-entry auxiliary device 330,
27 is a configuration diagram of the fourth embodiment of the wall pile 340,
28 is a configuration diagram of the fifth embodiment of the wall pile 350,
29 is a configuration diagram of the wall pile 360 according to the sixth embodiment.
30 is a block diagram of the wall pile 370 according to the seventh embodiment.
31 is a block diagram of a wall pile 380 according to an eighth embodiment.
32 is a configuration diagram of the ninth embodiment of the wall pile 390,
33 and 34 are configuration diagrams of a wall pile 400 according to a tenth embodiment.

Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings so that those of ordinary skill in the art can easily implement the present invention. However, the present invention may be implemented in various different forms and is not limited to the embodiments described herein. In the drawings, parts not related to the description are omitted in order to clearly describe the present invention, and similar parts will be described with like reference numerals throughout the description of the invention.

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

Example

1 to 14 are configuration diagrams showing a construction method of a top-down type underground roadway using a continuous wall of a forced underground according to an embodiment of the present invention in order of construction.

First, in order to construct an underground roadway, a construction plan, field survey and test construction, and linear survey are required.

Here, the construction plan should be planned in full consideration of the characteristics of design and construction, and field surveys are conducted to obtain information on local conditions, etc. necessary for construction. In particular, since the ground condition affects the quality of the continuous wall of the forcible underground, it is necessary to investigate the stratum composition, soil quality, and groundwater.

Field surveys check the surrounding work environment, including the plant site and equipment import routes. If obstacles such as underground buried objects are expected, probing, etc., as necessary, in cooperation with related organizations will be conducted in advance. If an underground obstacle exists, it is not possible to traverse the forced underground continuous wall method, so it is desirable to check and remove the obstacle in advance.

If construction is expected to be difficult, it is desirable to perform test construction.

Test construction is conducted to check construction speed, construction efficiency and soil quality. The results of the test construction are reflected in the design and construction plan as necessary. At the time of test construction, it is necessary to clarify the purpose of the test in consideration of local and ground conditions, and to conduct it in consideration of the overall process economy.

Linear surveying conducts surveying centered on the route for planning, design, and construction of the route, and recently, the optimal route is selected by the GSIS method. Then, the embankment and cut amount are calculated through a plan view, a longitudinal cross-sectional view, and a cross-sectional view.

Hereinafter, with reference to the accompanying drawings, a description will be made of a method of constructing a top-down underground roadway using a continuous wall of the forced ground according to the present invention.

Through the linear survey, a rope digger 11 and a trench 12 for forming the left and right side walls 110 and 130 corresponding to the inner wall and the intermediate wall 120 are excavated at a location where the underground roadway is to be constructed. The rope digging 11 and the trench 12 are excavated along the longitudinal direction (longitudinal direction) of the underpass at the points of the left and right side walls 110 and 130 and the intermediate wall 120 of the underpass to be constructed, and the TRD method It can be excavated using the cutter (Cutter) 21 of the machine (20). At this time, the depth of the trench 12 is formed deeper than the lower slabs 190 and 250 of the underpass to be constructed.

A pile (for example, H-beam pile, steel pipe pile, etc.) is connected to the trench of the excavated left and right side walls (110, 130) and the trench of the intermediate wall (120) by joint coupling, and forced underground continuous wall ( 111, 121, 131) are formed respectively, and then concrete 112 is poured into the bottom of the pile to fill. At this time, the forced underground continuous walls 111, 121 and 131 must be formed deeper than the lower slabs 190 and 250 of the underpass (see FIG. 14). In addition, the forced underground continuous walls 111, 121, 131 are composed of the left and right side walls 110, 130 and the intermediate wall 120 of the underpass, and perform the role of an earthen barrier and an ordering wall together, thereby increasing the bearing capacity and stiffness against the side wall load, It can greatly improve the seismic resistance against the stress and earthquake of the wall.

The forced underground continuous walls 111, 121, 131 may be continuously installed by joint coupling using various types of piles such as H beams and steel pipe piles. Embodiments of the forced underground continuous walls 111, 121, and 131 will be described in detail with reference to FIGS. 15 to 34 to be described later.

The underground roadway construction method of the present invention is, after constructing the forced underground continuous walls 111 and 131 of the left and right side walls 110 and 130 and the forced underground continuous wall 121 of the intermediate wall 120 in the longitudinal direction of the underground roadway, the By alternately constructing the left and right roads above the ground and allowing vehicles to pass through one road that is not under construction, there is no need to control vehicles or install separate bypass roads in the construction section.

For example, the ground of the road left above the ground of the underpass is dug according to the depth of the upper slab 160 of the underpass, the floor is flat, and then a precast girder 140 is installed. At this time, the bottom surface of the excavation must be excavated deeper than the height of the precast girder 140 (see FIGS. 3 to 5).

Thereafter, a precast girder 140 may be installed between the forced ground continuous wall 111 of the left wall 110 and the forced ground continuous wall 121 of the intermediate wall 120. The precast girder 140 may be installed using a steel bracket 150 and a stud (see FIG. 5). At this time, the precast girder 140 may be installed and assembled by transporting the precast girder 140 to a construction site through an underground road as a finished product constructed by pouring concrete in a factory.

Thereafter, topping concrete is poured on the top of the precast girder 140 or the upper slab 160 is formed by casting on-site using a copper bar and a formwork. At this time, by simultaneously pouring soil-cement on both sidewalls and under the precast girder 140 to form a part of the left wall and the intermediate wall, the upper slab 160 and the precast girder 140 Make sure to support the load sufficiently.

In addition, a waterproof layer 170 is formed on the upper slab 160 by a waterproof coating treatment or a waterproof material (eg, a waterproof sheet) (see FIG. 6). In this case, the waterproof layer 170 may be constructed as a protective mortar waterproof sheet layer.

Thereafter, the lower part of the precast girder 140 is dug according to the depth of the lower slab 190 of the underpass, and the floor is evenly leveled, and then a waterproof coating is applied to the top of the bottom surface of the dug or a waterproof sheet is used. A waterproof layer 180 is formed. In addition, a lower slab 190 is formed by pouring soil-cement on the waterproof layer 180 (see FIG. 7 ).

For reference, in FIG. 7, reference numeral 191 indicated on the left side of the lower slab 190 denotes a cavity, and reference numeral 192 denotes a drainage hole.

Thereafter, soil-cement is poured into the inner walls of both sides of the underpass to form the left wall 110 and the intermediate wall 120, and the upper part of the upper slab 160 is covered by backfilling to prevent vehicle passage. Restore the road to the left of the ground so that it is possible (see Fig. 8).

Then, the ground of the road on the right side of the ground of the underpass is dug according to the depth of the upper slab 220 of the underpass, and the floor is flat, and then a precast girder 200 is installed. At this time, the bottom surface of the excavator must be excavated deeper than the height of the precast girder 200 (see FIGS. 9 to 10).

Thereafter, a precast girder 200 may be installed between the forced ground continuous wall 121 of the intermediate wall 120 and the forced ground continuous wall 131 of the right wall 130. The precast girder 200 may be installed using a steel bracket 210 and a stud (see FIG. 10). At this time, the precast girder 200 is a finished product constructed by pouring concrete in a factory and is transported to a construction site through an underground road to be installed and assembled.

Thereafter, topping concrete is placed on the upper part of the precast girder 200 or the upper slab 220 is formed by casting on-site by using a copper bar and a formwork. At this time, by simultaneously pouring soil-cement on both side walls of the precast girder 200 and below it to form a part of the left wall and the intermediate wall, the upper slab 220 and the precast girder 200 Make sure to support the load sufficiently.

In addition, a waterproof layer 230 is formed on the upper slab 220 with a waterproof coating or a waterproof sheet (see FIG. 11).

Thereafter, the lower part of the precast girder 200 is dug according to the depth of the lower slab 250 of the underpass, and the bottom is evenly leveled, and then a waterproof coating is applied to the top of the bottom surface of the dug or a waterproof sheet is used. A waterproof layer 240 is formed. In addition, a lower slab 250 is formed by pouring soil-cement on the waterproof layer 240 (see FIG. 12).

For reference, in FIG. 12, reference numeral 251 indicated on the right side of the lower slab 250 denotes a cavity, and reference numeral 252 denotes a drainage hole.

Thereafter, soil-cement is poured on the inner walls of both sides of the underpass to form the intermediate wall 120 and the right wall 130, and the upper part of the upper slab 220 is covered by backfilling to prevent vehicle passage. Restore the road to the right of the ground so that it is possible (see Fig. 14).

Finally, by constructing a pavement 260 with asphalt concrete on the lower slabs 190 and 250 of the underpass, the underpass is completed.

On the other hand, the construction method of the underpass according to the present invention may be constructed by pouring topping concrete without installing the precast girders 140 and 200, or by forming the upper slabs 160 and 220 by casting on-site using a copper bar and a formwork. .

As described above, in the method of constructing an underpass according to the present invention, after constructing an underpass on one side of the road in a top-down method using a forced underground continuous wall, the road is restored by backfilling to open the traffic. Therefore, by securing the rigidity of the structure and then constructing the opposite road in the same way, it can be safely constructed according to the securing of the supporting power and rigidity of the structure. In addition, it is possible to construct an underpass safely and quickly without road blocking and bypass opening.

In addition, the construction method of the underground roadway according to the present invention is to form a continuous wall under the ground by jointing piles such as H beams or steel pipe piles to form the left and right side walls (110, 130) and the intermediate wall (120) of the underpass. At the same time, by simultaneously performing the role of the retaining wall and the ordering wall, it is possible to increase the bearing capacity and stiffness against the load acting on the side wall, and greatly improve the earthquake resistance against the stress and earthquake of the wall.

Examples of underpass

As shown in Figs. 1 to 14, the top-down underground roadway using the continuous wall of the forced underground according to the present invention is the left and right side walls 110 and 130 and the middle wall 120 of the underground roadway, and the left and right basement. It can be configured including a driveway.

The left and right side walls 110 and 130 and the intermediate wall 120 of the underpass may be formed as a continuous wall by jointing a pile along the longitudinal direction of the underpass, and may be poured into concrete.

The left underpass is constructed by excavating the left road while passing a vehicle using the right road above the ground of the underpass, and between the forced underground continuous wall 111 and the intermediate wall 120 of the left wall 110 A precast girder 140 installed with a steel bracket 150 between the continuous walls 121 and an upper slab formed by pouring topping concrete on the precast girder 140 or casting on-site using a copper bar and a formwork (160), a waterproof layer 170 formed on the upper slab 160, a waterproof layer 180 formed on a bottom surface excavated under the precast girder 140, and on the waterproof layer 180 In the lower slab 190 formed by pouring soil-cement, and the forced ground continuous wall 111 of the left wall 110 and the forced ground continuous wall 121 of the intermediate wall 120, the soil-cement is formed by pouring It may be configured to include the left wall 110 and the middle wall 120.

The right underpass is constructed by digging the ground on the right road after restoring the ground left road so that vehicles can pass by covering the upper part of the upper slab 160 of the left underpass by backfilling, and the right wall A precast girder 200 installed with a steel bracket 210 between the steel-ground continuous wall 131 of 130 and the steel-ground continuous wall 121 of the intermediate wall 120, and the precast girder 200 Excavating the upper slab 220 formed by pouring topping concrete or casting on-site using copper bars and formwork, the waterproof layer 230 formed on the upper slab 220, and the lower part of the precast girder 200 The waterproof layer 240 formed on the top of one bottom surface, the lower slab 250 formed by pouring soil-cement on the waterproof layer 240, and the forced underground continuous wall 131 of the right wall 130 and the middle It may be configured to include a right wall 130 and an intermediate wall 120 formed by pouring soil-cement on the continuous wall 121 of the wall 120.

On the other hand, the construction method of the underpass according to the present invention may be constructed by pouring topping concrete without installing the precast girders 140 and 200, or by forming the upper slabs 160 and 220 by casting on-site using a copper bar and a formwork. .

And, when the depth of the underground roadway is deep, the support between the forced underground continuous walls 111 and 131 of the left and right side walls 110 and 130 above the upper slabs 160 and 220 and the forced underground continuous wall 121 of the intermediate wall 120 It can be configured to secure rigidity by installing (not shown).

Examples of wall piles

15 to 29 are views showing an embodiment of an outer wall pile and a central separation wall wall pile.

First, FIG. 15 is a first embodiment of the wall pile 270, which is composed of an H-beam pile 270 in which C-shaped joints 272 are formed at both ends of the flange.

In addition, FIG. 16 is a second embodiment of the wall pile 280, which is composed of an H-beam pile 280 in which I-type joints 282 are formed at both ends of the flange.

In addition, FIG. 17 is a third embodiment of the wall pile 290, which is composed of an H-beam pile 290 having T-shaped joints 292 formed at both ends of the flange.

18 is a block diagram showing the joint coupling of the wall piles 270 and 280, by coupling the I-type joint 282 of the H-beam pile 280 to the C-type joint 272 of the H-beam pile 270 Continuous walls can be formed. Soil-cement is poured into the joint joint of the H-beam piles 270 and 280 and the C-shaped joint 272 and the I-shaped joint 282, and the left and right walls 110 and 130 and the middle The continuous walls 111, 121 and 131 of the wall 120 may be formed.

19 is a block diagram showing the joint coupling of the wall piles 270 and 290, by coupling the T-shaped joint 292 of the H-beam pile 290 to the C-shaped joint 272 of the H-beam pile 270 Continuous walls can be formed. Soil-cement is poured into the joint of the H-beam piles 270 and 290, the C-shaped joint 272, and the T-shaped joint 292, and the left and right walls 110 and 130 and the middle The continuous walls 111, 121 and 131 of the wall 120 may be formed.

20 and 21 are configuration diagrams showing an example in which a flange reinforcement 273 is attached to the outer surface of the flange of the wall pile 270.

Here, in the case of FIG. 20, by attaching the flange reinforcement material 273 to the entire outer surface of the flange of the wall pile 270 by welding, rigidity and stress can be greatly increased.

In the case of FIG. 21, by attaching a flange reinforcement material 273 to the outer surface of the flange of the wall pile 270 by welding, the stiffness and stress of the flange may be greatly reinforced and increased.

22 shows an example in which a flange reinforcement material 273 is attached to the flange outer and inner surfaces of the wall pile 270, and a sealing material is formed on the flange surface and the web surface to which the flange reinforcement material 273 is not attached. As a configuration diagram, it is possible to improve the water resistance with an increase in the stiffness and stress of the flange.

23 is a configuration diagram showing an example of attaching the shear stiffener 275 to the inside of the flange of the wall pile 270, it is possible to greatly improve the bending moment, axial force and shear force in the vertical direction.

24 and 25 are configuration diagrams showing an example in which sealing materials (300, 310) are attached to the joints of the wall piles (270, 280) to improve water resistance, and an irregular sealing material (300) on the joints of the wall piles (270, 280) , By installing the band-shaped sealing material 310 and suppressing it with the inner wall concrete 60, high water resistance can be obtained. Here, reference numeral 50 denotes a soil cement.

FIG. 26 is a block diagram showing the joint part 320 of the wall piles 270 and 280 and the near-entry auxiliary device 330. As shown in FIG. The joint joint 320 serves to jointly connect two wall piles 270 and 280 to one another, and the near-entry auxiliary device 330 has a funnel shape with an open side of the H-beam pile 270. It may be installed at the end of the C-type joint 272.

27 is a configuration diagram of a wall pile 340 according to the fourth embodiment, consisting of an H-beam pile 340 in which semi-annular joints 342 and 343 are formed in opposite directions to each other at both ends of a flange, and the H-beam pile 340 ) To the semi-circular joint 342 of the H-beam pile 340 and the semi-circular joint 343 of another H-beam pile having the same configuration as the H-beam pile 340, and then pouring a soil-cement to the left and The right walls 110 and 130 and the forced ground continuous walls 111, 121 and 131 of the intermediate wall 120 may be formed.

28 is a configuration diagram of a wall pile 350 according to the fifth embodiment, in which a'┗┛' type joint 352 and a'┏┓' type joint 353 are formed in opposite directions to each other on both ends of a flange. Composed of 350, the'┗┛' type joint 352 of the H-beam pile 350 and the'┏┓' type joint 353 of another H-beam file having the same configuration as the H-beam pile 350 After facing each other, soil-cement may be poured to form the forced ground continuous walls 111, 121 and 131 of the left and right walls 110 and 130 and the intermediate wall 120.

29 is a configuration diagram of a wall pile 360 according to the sixth embodiment, in which a'┗┛' type joint 352 and a'┏┓' type joint 353 are formed in opposite directions to each other at both ends of the flange, and the flange Consisting of an H-beam file 350 with both ends bent in a'┗' type and a'┓' type, the H-beam pile 350 is attached to the'┗┛'-type joint material 352 of the H-beam pile 350. The'┏┓' type joint (353) of another H-beam pile with the same configuration as that of the other H-beam piles is joined to each other, and the'┓' type and'┗' type at the end of the flange are placed oppositely, and then soil-cement is poured and constructed. Thus, the continuous walls 111, 121 and 131 of the left and right walls 110 and 130 and the intermediate wall 120 may be formed.

Another embodiment of the underpass

Another embodiment of the underpass of the top-down method using the forced underground continuous wall according to the present invention, the forced underground continuous walls 111 and 131 of the left and right side walls 110 and 130 and the intermediate wall 120 It may be configured by jointly coupling the continuous steel wall 121 with a steel pipe pile 370.

30 is a configuration diagram of a wall pile according to the seventh embodiment, which may be composed of a steel pipe pile 370 in which a C-shaped joint 371 is formed on one side of a flange, and a T-shaped fitting 372 is formed on the other side. .

In the seventh embodiment of the wall pile, after combining the T-shaped fitting member 372 of another steel pipe pile 370 having the same configuration as the steel pipe pile 370 to the C-shaped joint 371 of the steel pipe pile 370, By pouring soil-cement, the continuous walls 111, 121 and 131 of the left and right walls 110 and 130 and the intermediate wall 120 may be formed.

31 is a configuration diagram of a wall pile according to the eighth embodiment, a C-shaped joint 381 is formed on one side of the flange, and may be composed of a steel pipe pile 380 formed with a circular fitting 382 on the other side.

In the eighth embodiment of the wall pile, after combining the circular fitting material 382 of another steel pipe pile 380 having the same configuration as the steel pipe pile 380 to the C-shaped joint 381 of the steel pipe pile 380, -By pouring cement (soil-cement), it is possible to form the continuous walls 111, 121, and 131 of the left and right walls 110 and 130 and the intermediate wall 120 and under ground.

FIG. 32 is a configuration diagram of a wall pile according to the ninth embodiment, and may be composed of a steel pipe pile 390 in which a C-shaped joint 391 is formed on one side of a flange, and a circular fitting 392 is formed on the other side.

형 이음재(391)에 상기 강관 파일(390)과 구성이 동일한 다른 강관 파일(390)의 T형 끼움재(382)를 결합한 후 소일-시멘트(soil-cement)를 타설 시공하여 상기 좌측 및 우측벽체(110,130)와 상기 중간벽체(120)의 강제지중 연속벽(111,121,131)을 형성시킬 수 있다.In the ninth embodiment of the wall pile, the steel pipe pile 390

After combining the T-shaped fitting material 382 of the other steel pipe pile 390 having the same configuration as the steel pipe pile 390 to the type joint 391, soil-cement is poured and constructed to the left and right walls. It is possible to form the (110, 130) and the continuous walls 111, 121, 131 of the intermediate wall 120 and the forced ground.

형 이음재(401)가 형성되고 타측 단부에

형 이음재(402)가 형성된 H빔 파일(400)로 구성되며, 상기 H빔 파일(400)의

형 이음재(401)와 상기 H빔 파일(400)과 동일한 구성을 갖는 다른 H빔 파일의

형 이음재(402)를 대향 배치한 후 소일-시멘트(soil-cement)를 타설 시공하여 상기 좌측 및 우측벽체(110,130)와 상기 중간벽체(120)의 강제지중 연속벽(111,121,131)을 형성시킬 수 있다.33 and 34 are configuration diagrams of a wall pile according to a tenth embodiment, at one end of a flange

A type joint 401 is formed and at the other end

It is composed of an H-beam pile 400 in which the type joint material 402 is formed, and the H-beam pile 400

Type joint material 401 and other H-beam piles having the same configuration as the H-beam pile 400

After arranging the type joint material 402 to face each other, soil-cement is poured to form the continuous walls 111, 121, and 131 of the left and right walls 110, 130 and the intermediate wall 120. .

In addition, in order to reinforce the strength of the forced underground continuous walls 411 and 431 of the left and right side walls 410 and 430 and the forced underground continuous wall 421 of the intermediate wall 420 due to the excavation in the upper part of the underground roadway, the present invention is horizontal and vertical. A brace (not shown) may be installed in the direction. At this time, the support beam may be made of all commonly used materials such as H beams and steel pipes.

As described above, the top-down roadway and its construction method using a forced underground continuous wall according to the present invention is a top-down method using a forced underground continuous wall. The technical problem of the present invention can be solved by constructing one underpass and then restoring the road by backfilling to open the traffic to secure the rigidity of the structure and then constructing the other road in the same way.

In addition, a pile of H beams or steel pipes, etc., is formed by jointing to form a continuous wall of the ground as a retaining wall and an order wall, and constructed in a top-down manner, thereby solving the technical problem of the present invention.

The preferred embodiments of the present invention described above are disclosed in order to solve the technical problem, and if a person having ordinary knowledge in the technical field to which the present invention belongs (a person skilled in the art), various modifications, changes, additions, etc., within the spirit and scope of the present invention. This will be possible, and such modifications and changes should be viewed as falling within the scope of the following claims.

형 이음재
392 : T형 끼움재
400 : 플랜지 양단에 이음재가 형성된 H빔 파일
401 :

형 이음재 402 :

형 이음재10: ground 11: rope digging hole (temporary hole)
12: Trench 20: TRD method
21: Cutter 30: vehicle
40: excavator 50: soil cement
60: inner wall concrete
100: Underground roadway of a top-down method using a continuous wall of forced underground
110: outer wall (left wall) 111: forced underground continuous wall of the left wall
112: concrete 120: intermediate wall (central separation wall wall)
121: forced underground continuous wall of intermediate wall 122: concrete
130: outer wall (right wall) 131: forced underground continuous wall of the right wall
132: concrete
140: Left Precast Girder
150: steel bracket 160: upper left slab
170: upper waterproof layer 180: lower waterproof layer
190: lower left slab 191: cavity
192: drainage
200: Right Precast Girder
210: steel bracket 220: upper right slab
230: upper waterproof layer 240: lower waterproof layer
250: right lower slab 251: cavity
252: drainage 260: paved road
270: H-beam pile with C-type joints formed at both ends of the flange
271: body 272: C-type joint
273, 274: flange stiffener 275: shear stiffener
280: H-beam pile with I-type joints formed at both ends of the flange
281: body 282: I-type joint
283, 284: Flange reinforcement
290: H-beam pile with T-type joints formed at both ends of the flange
291: body 292: T-type joint
300: irregular type sealing material 310: band-shaped sealing material
320: joint joint 330: near-entry assistance device
340: H-beam pile with semi-annular joints formed at both ends of the flange
341: body 342: semi-ring type joint
350: H-beam pile with'┏┓'or'┗┛' type joints formed on both ends of the flange
351: body 352:'┏┓'or'┗┛' type joint
360: H-beam file with'┏┓'or'┗┛' type joints on both ends of the flange
361: body 362:'┏┓'or'┗┛' type joint
370: steel pipe pile 371: C-type joint
372: T-type fitting 380: steel pipe pile
381: C-type joint member 382: circular fitting member
390: steel pipe file 391:

Mold joint
392: T-type fitting
400: H-beam pile with joints formed at both ends of the flange
401:

Type joint 402:

Mold joint

Claims (10)

(a) digging a rope and excavating a trench along the longitudinal direction of the underpass at the points of the left and right side walls (110, 130) and the intermediate wall (120) of the underpass through linear surveying;
(b) By jointing a pile into the trenches of the excavated left and right side walls (110, 130) and the intermediate wall (120), continuous walls (111, 121, 131) are formed respectively, and poured into the bottom of the pile with concrete (112) The step of doing;
(c) Excavate the ground on the left side road of the underpass according to the depth of the upper slab 160, even the bottom, and then install the precast girder 140 into the forced underground continuous wall of the left wall 110 ( 111) and the forced ground continuous wall 121 of the intermediate wall 120, and then pouring topping concrete or forming an on-site casting furnace upper slab 160 using a copper bar and a formwork, and the upper slab 160 Forming a waterproof layer 170 thereon;
(d) Excavating the lower part of the precast girder 140 according to the depth of the lower slab 190, and evenly leveling the floor, and then forming a waterproof layer 180 on the upper part of the floor surface, and then pouring soil-cement. Forming a lower slab 190 and forming a left wall 110 and an intermediate wall 120;
(e) covering the upper part of the upper slab 160 by backfilling and restoring the left-hand side of the ground so that the vehicle can pass;
(f) Excavate the ground on the right side road of the underpass according to the depth of the upper slab 220, and evenly the floor, and then install the precast girder 200 into the forced underground continuous wall of the intermediate wall 120 ( 121) and the forced ground continuous wall 131 of the right side wall 130, and then pouring topping concrete or forming an on-site casting furnace upper slab 220 using a copper bar and a formwork, and the upper slab 220 Forming a waterproof layer 230 thereon;
(g) After digging the lower part of the precast girder 200 according to the depth of the lower slab 250, and evenlying the floor, a waterproof layer 240 is formed on the upper surface of the precast girder 200, and then soil-cement is poured. Forming the lower slab 250 and constructing the right wall 130 and the intermediate wall 120 and auxiliary holes; And
(h) covering the upper part of the upper slab 220 by backfilling, restoring the right road above the ground so that the vehicle can pass, and paving the lower slabs 190 and 250 of the underpass with asphalt;
A top-down method of construction of an underpass including a.
The method of claim 1,
The construction method of the underpass,
H-beam pile 270 formed with C-shaped joints 272 at both ends of the flange;
H-beam pile 280 formed with I-type joints 282 at both ends of the flange; And
Including; H-beam pile 290 having T-shaped joints 292 formed at both ends of the flange,
After jointing and coupling the I-type joint 282 of the H-beam pile 280 or the T-type joint 292 of the H-beam pile 290 to the C-type joint 272 of the H-beam pile 270, soil- Construction method of a top-down underground roadway in which cement is poured to form the left and right walls (110, 130) and the forced underground continuous walls (111, 121, 131) of the intermediate wall (120).
The method of claim 2,
The construction method of the underpass,
A method of constructing a top-down underground roadway in which a funnel-shaped access assistance device 330 with one side opened at the end of the C-shaped joint 272 of the H-beam pile 270 is installed.
The method of claim 2,
The construction method of the underpass,
A flange stiffener 273 is attached to the outer surfaces of the H-beam piles 270, 280, 290 by welding to increase rigidity, and shear stiffeners 275 are attached to both inner sides of the flange by welding to enhance the shear force in the vertical direction. How to construct a top-down underpass.
The method of claim 2,
The construction method of the underpass,
A top-down method of construction of an underground roadway in which sealing materials (300, 310) are attached to the joints of the H-beam piles (270, 280, 290) to improve water resistance.
The method of claim 1,
The construction method of the underpass,
Including; H-beam pile 340 formed in opposite directions to each other, semi-ring type joints (342, 343) at both ends of the flange,
After jointing and bonding a semi-circular joint 343 of another H-beam pile having the same configuration as the H-beam pile 340 to the semi-circular joint 342 of the H-beam pile 340, soil-cement is poured and constructed to the left. And a top-down method of constructing an underground roadway comprising the right wall (110, 130) and the forced underground continuous wall (111, 121, 131) of the intermediate wall 120.
The method of claim 1,
The construction method of the underpass,
Including; H-beam pile 350 formed in opposite directions to each other with'┗┛' type joint material 352 and'┏┓' type joint member 353 at both ends of the flange,
Soil-cement after jointing the'┗┛' type joint 352 of the H-beam pile 350 with the'┏┓' type joint 353 of another H-beam pile having the same configuration as the H-beam pile 350 A top-down method of construction of an underground roadway in which the left and right walls (110, 130) and the forced underground continuous walls (111, 121, 131) of the left and right walls (120) are constructed by pouring construction.
The method of claim 1,
The construction method of the underpass,
Including; a C-shaped joint 371 is formed on one side and a steel pipe file 370 having a T-shaped fitting 372 formed on the other side,
After jointing and coupling a T-shaped fitting member 372 of another steel pipe pile having the same configuration as the steel pipe pile 370 to the C-shaped joint 371 of the steel pipe pile 370, soil-cement was poured to the left and right side walls (110,130). ) Of the forced underground continuous wall 111 and the forced underground continuous wall 121 of the intermediate wall 120, a top-down method of construction of an underground roadway.
The left and right side walls (110, 130) and intermediate walls (120) of the underpass constructed by forming a continuous wall of forced underground by connecting the piles along the longitudinal direction of the underpass;
It is constructed by excavating the left road while passing the vehicle using the right road above the ground of the underground roadway, and the continuous wall 111 of the forced underground of the left wall 110 and the continuous wall 121 of the forced ground of the intermediate wall 120 ), a precast girder 140 installed with a steel bracket 150 between, and an upper slab 160 formed by placing a topping concrete on the precast girder 140 or by on-site casting using a copper bar and a formwork, and the A waterproof layer 170 formed on the upper slab 160, a waterproof layer 180 formed on the bottom surface excavated under the precast girder 140, and a soil-cement pouring furnace on the waterproof layer 180 The formed lower slab 190, the forced ground continuous wall 111 of the left wall 110 and the left wall 110 formed by pouring soil-cement on the forced ground continuous wall 121 of the intermediate wall 120, and A left underpass with an intermediate wall 120; And
The top of the upper slab 160 of the left underpass is covered by backfilling to restore the left side road so that vehicles can pass, and then the ground on the right side road is excavated to be constructed, and the forced ground of the right wall 130 A precast girder 200 installed with a steel bracket 210 between the continuous wall 131 and the continuous wall 121 of the intermediate wall 120 and the topping concrete is poured on the precast girder 200 The upper slab 220 formed by on-site casting using a furnace or copper bar and a formwork, the waterproof layer 230 formed on the upper slab 220, and the lower part of the precast girder 200 are on the top of the excavated bottom surface. The waterproof layer 240 formed, the lower slab 250 formed by pouring soil-cement on the waterproof layer 240, and the forced ground continuous wall 131 of the right wall 130 and the intermediate wall 120 A right underground roadway provided with a right wall 130 and an intermediate wall 120 formed by pouring soil-cement on the underground continuous wall 121;
Includes a top-down underpass.
The method of claim 9,
The underpass is,
The steel underground continuous wall (111, 121, 131) formed as a continuous wall by jointly coupling H-beam piles with joints formed at both ends of the flange;
A flange reinforcement (273) that is attached to the outer surface of the flange of the H-beam pile by welding to enhance strength;
A shear stiffener 275 that is attached to the inside of the flange by welding to enhance the shear force in the vertical direction; And
Sealing materials (300, 310) that are attached to the joint coupling portion of the H-beam pile to improve water-resistance;
Includes a top-down underpass.

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