KR101439400B1 - A hinged base structure of arch-shaped composite structure with the precast concrete pannel and the steel frame using the open trench tunnel and method for constructing arch-shaped open trench tunnel - Google Patents

Abstract

The present invention relates to a hinge substructure of a covered arch synthetic structure using a precast concrete panel and a steel frame, and a method for constructing a covered arch synthetic structure using the same. The purposes of the present invention are to reduce a cross-section of an arch portion, simplify the parts and materials, and increase the economic efficiency by reducing the quantity of the materials, by connecting the arch portion and a foundation portion to prevent bending moment from being generated at a point portion and minimizing the bending moment in order to provide the structural stability. The hinge substructure of the covered arch synthetic structure using the precast concrete panel and the steel frame according to the present invention is to support both sides of the arch portion (200) consisting of the steel frame (210) and the precast concrete panel (220) which is installed to the frame.

Description

TECHNICAL FIELD [0001] The present invention relates to a hinged base structure of an arch-shaped composite structure using a precast concrete panel and a steel frame, and a method of constructing an arch-shaped composite structure using the same, trench tunnel and method for constructing arch-shaped open trench tunnel}

More particularly, the present invention relates to a foundation for an arch-like arch structure, and more particularly, to a structure in which the arch portion is hingedly connected to the arch portion so as to prevent a bending moment from being generated at the point portion, The present invention relates to a hinged foundation structure of a composite arch structure using a precast concrete panel and a steel frame, which can simplify materials and reduce the number of products, and a construction method of a composite arch structure using the same.

The preservation of the natural environment of the roadside and the railroad is becoming an important issue under the trend of development of road network such as road railroad.

In order to preserve the environment, roads and railways designed to pass through mountains are being constructed by tunnel method.

Tunnels are divided into urban tunnels, which are highly influenced by groundwater, such as subway in cities, and mountain tunnels, which receive relatively little groundwater such as local highways. When constructing mountain tunnels, it is necessary to make a great effort to preserve the environment.

Typical methods of constructing tunnel structures include constructing a tunnel structure by fully opening a tunnel construction site such as an underpass or a tunnel and then constructing an open trench construction (Open Trench Method: hereinafter referred to as " OTM ") and a place where a construction site is to be constructed, a tunnel is formed by using a shield tunneling machine or the like to form a tunnel, There is a tunnel boring method (TBM) for constructing a tunnel structure. In addition, there is a pipe roof method in which a tunnel is constructed under a road or a railway rail, and a pipe structure is used to construct an underground structure under a state that the upper soil layer is supported by a pipe. Among the open trench method (O.T.M.) and tunnel boring method (T.B.M.) method, shield tunnel boring method (T.B.M.) and NATM tunnel method are typical methods.

This shield tunnel boring method or the NATM tunnel method is mainly used in the urban area and the ground layer composed of the rock layer. In the course of constructing the tunnel, the ground tunnel structure (roads and buildings) and the underground construction structures (sewage pipes and gas pipes ) And the tunnel traffic can be constructed with minimal impact on the ground traffic flow.

Conventional open type tunnels include open trench method (O.T.M.), method using precast concrete block, method of casting on-site concrete, method using corrugated steel sheet which is wrinkled steel. An open type tunnel is mainly used when the height of the soil layer is small at the upper part of the tunnel or the condition of the soil layer is weak so that the structural safety of the non-opening type tunnel can not be secured.

This type of tunnels should be designed in consideration of waterproofing, order, and load of the tunnel over the earth. Conventionally, since the tunnels are structurally weak, there is a danger of collapse to apply the large tunnel, And the construction period is prolonged. Since the corrugated steel sheet has a small structural stiffness, it is difficult to construct the corrugated tunnel having a wide width over three lanes. Conventional tunnels can be constructed to have a width of less than 2 or 3 lanes when the middle pillar of the road is not constructed due to the mechanical characteristics of the concrete structure and the corrugated steel plate. Even when the middle pillar of the road is constructed, I can not construct. In this case, when the middle pillar of the road is constructed, there is a high possibility of collision of the vehicle traveling in the tunnel, and leakage of ice from the pillar in the winter causes icicles, which often hinders the safe operation of the vehicle.

As described above, when the pillar is not installed at the center of the road, the slope of 20 m to 40 m is inevitably generated at the highway toll construction of the national highway and the highway, There is also.

In addition, in the case of clipping existing roads, since the traffic control period is required for about 1 month to 12 months unless a separate detour road is made during tunnel construction, cost loss for construction of detour road, cost loss due to traffic control, There is.

In order to solve such a problem, Patent No. 10-0546432 (a composite arch structure using a precast concrete panel and a steel frame and a construction method thereof) invented and patented by the present applicant is available.

Patent Literature 1 can reduce the construction time by minimizing the installation by putting on the spot while securing the stability of the structure by the structural dynamical synthesis action of the steel frame and the precast concrete, As shown in FIG. 1, a steel frame 1 having a lattice shape and having an arcuate shape by a plurality of molds and cross beams; A plurality of precast concrete panels 2 inserted in a grid form in a plurality of reinforcing bars in the interior of the frame 1 and installed continuously on the upper surface of the frame 1 along the shape of the frame 1; A concrete connection part installed between the precast concrete panels; And a base concrete block (3) which is formed at a predetermined interval on the ground surface and on which the left and right sides of the frame are fixed, respectively, and the upper surface of the mold corresponding to the concrete connection portion without interfering with the precast concrete panel The tunnel is constructed through the structural dynamics synthesis of the frame made of steel material and the precast concrete panels and the column is installed inside the tunnel. It is possible to reduce the width of the road to 4 lanes, 8 lanes, 10 lanes or more, so that it is possible to remarkably reduce the to-do portion of the domestic mountain construction.

However, the base of Patent Document 1 has the following structure.

A plurality of anchors (for example, a reinforcing bar anchor) 4 are embedded in the base concrete block 3 at the time of molding the base concrete block 3 A nut 6 is fastened to an anchor 4 penetrating through the anchor 4 and welded to a fixing plate 5 which is in surface contact with the base concrete block 3, do.

According to the basic structure of this structure, since the foundation portion and the upper arch portion (the structure made of the steel frame 1 and the precast concrete panel 2) are structured so as to move integrally, A bending moment is generated in the base portion which is the lower portion of the arch portion. In order to cope with such a bending moment, the cross section of the frame 1 is increased and the number of frames is increased. It has a disadvantage in that it is changed from a central portion to a fulcrum portion, resulting in deterioration in manufacturing and workability, and in addition, it is uneconomical.

Patent No. 10-0546432

SUMMARY OF THE INVENTION The present invention has been made to solve the above-mentioned problems, and it is an object of the present invention to provide a hinge structure for connecting an arch portion and a base portion in a hinged manner to prevent a bending moment from being generated in a fulcrum portion, The present invention aims at providing a hinged foundation structure of a composite arch structure using a precast concrete panel and a steel frame which can reduce the quantity of the composite structure and simplify the construction of the composite structure.

The hinged foundation structure of the composite arch structure using the precast concrete panel and the steel frame according to the present invention is constructed in such a manner that the hinged foundation structure is installed along the road direction on both sides in the width direction of the composite arch structure, A concrete foundation block and a concrete foundation block, both sides of an arch part made of a precast concrete panel installed are respectively supported. A hinge connection part formed by alternately repeating grooves in the concrete foundation block along the traveling direction of the road and hinged to the frame of the arch part and a panel fixing part for fixing the precast concrete panel of the arch part to be inserted and fixed; An anchor bar set fixed to the hinge connection part and fastened to a fixing plate formed at an end of the frame of the arch part; And a filling material filled in the hinge connection part to fix the anchor bar set to enable hinge movement of the arch part.

The method for constructing the composite arch structure using the hinged foundation structure of the composite arch structure using the precast concrete panel and the steel frame according to the present invention is characterized in that a first step of constructing a hinged foundation structure on both sides of the composite arch structure Wow; And a second step of installing a frame of the composite arch structure between the hinged foundation structures constructed through the first step and installing a precast concrete panel on the frame, A step 1-1 of constructing the concrete base block so that the concave base block is formed by alternately repeating forming the groove-like hinge connection portion and the panel fixing portion in the concrete foundation block, And an anchor bar set in a connection portion and filling the hinge connection portion with a filler material to fix the anchor bar set, and the second step includes a step of attaching the anchor bar set to the anchor bar set A step 2-1 of attaching and fixing a fixing plate formed at an end of the frame of the arch part to construct an arched frame, The installation and the pre-cast concrete panels to the framework of the arcuate characterized in that it includes a first step 2-2 of the installation by inserting the end of the pre-cast concrete panels to the panel fixing portion formed in the base block.

According to the hinge foundation structure of the composite arch structure using the precast concrete panel and the steel frame according to the present invention and the construction method of the composite arch structure using the same, the branch portions of the arch portion and the foundation portion are hinged, If the bending moment is not applied to the arch composite structure, or its size is greatly reduced, the section of the steel frame of the arch structure can be reduced, and the file can be applied to the lower portion of the foundation, the number of files can be reduced, Air can be shortened.

In addition, although the section of the steel frame of the arch structure changes in the conventional fixed-end structure type, the sectional shape of the hinge structure according to the present invention is not changed, so that the workability, quality, and economy of the steel material are secured .

BRIEF DESCRIPTION OF THE DRAWINGS Fig. 1 is a view showing a base part of a composite arch structure according to the prior art; Fig.
2 is a view showing a hinged foundation structure of a composite arch structure using a precast concrete panel and a steel frame according to the present invention.
FIG. 3 is a plan view of a main part of a hinged foundation structure of a composite arch structure using a precast concrete panel and a steel frame according to the present invention. FIG.
FIG. 4 is a perspective view illustrating a hinge frame and an anchor bar, which are applied to a hinged foundation structure of a composite arch structure using a precast concrete panel and a steel frame according to the present invention.
FIG. 5 is a perspective view of a hinged frame applied to a hinged foundation structure of a composite arch structure using a precast concrete panel and a steel frame according to the present invention. FIG.
6 is a view showing a construction process of a hinged foundation structure of a composite arch structure using a precast concrete panel and a steel frame according to the present invention.
7 is a view showing a construction process of a composite arch structure having a hinged foundation structure of a composite arch structure using a precast concrete panel and a steel frame according to the present invention.
8 is a view showing another example of a hinge connection part and a panel fixing part applied to a hinged foundation structure of a composite arch structure using a precast concrete panel and a steel frame according to the present invention.
9 is a perspective view showing a construction state of a hinged foundation structure of a composite arch structure using a precast concrete panel and a steel frame according to the present invention.

As shown in FIGS. 2 and 3, the hinged foundation structure 100 of the composite arch structure using the precast concrete panel and the steel frame according to the present invention includes a concrete foundation block 10 A hinge frame 20 installed in the base block 10 and having a plurality of hinge portions 20a and 20b formed in the hinge frame 20 so that the frames of the arch portions are connected to each other, And an anchor bar set 40 inserted into the hinge frame 20 and fixed to the filler 30 and fastened to the frame 210 of the arch portion 200.

The base block 10 is a structure for supporting the arch portion 200 such that both ends in the width direction of the arch portion are hingedly connected to each other and can be installed in the field (although precast can be carried out, Field installation is preferred). That is, the foundation block 10 is installed by matching the form to the shape of the foundation block 10 and by placing the concrete in the form of curing. At this time, when the hinge frame 20 also functions as a form, ) Shall not be used for the part where it is installed.

2 to 4 and 9, the hinge frame 20 is formed in a box shape for forming a hinge portion by the filling material 30 and is made of steel or the like, A hinge connection box 21 and a precast concrete panel 220 (hereinafter referred to as "panel") are inserted into the hinge connection box 210, And a panel-fixing box 22 of a groove type in which an insertion is fixed.

The hinge connection box 21 is a box having a space therein, for example, a rectangular box, and has an opening at one side to fill the filler 30 and the like.

The panel fixing box 22 is formed on the side of the hinge connection box 21 and a part of the panel fixing box 22 is opened to insert the panel 220.

As shown in FIG. 5, the hinge frame 20 and the panel fixing box 22 are alternately repeated. In consideration of the steps of manufacture, transportation, and construction, the hinge frame 20 includes a single hinge connection portion 21, And two panel fixing boxes 22 protruding from one side of the hinge connecting box 21 and the hinge connecting box 21. The two neighboring hinge frames 20 are connected to the adjacent panel The fixed boxes 22 may be arranged in a row so that one panel 220 is inserted.

The hinge frame 20 may be provided with one or more studs to securely hold the base block 10.

The hinge connection box 21 and the panel fixing box 22 are integrally formed. However, under the premise of achieving the object of the present invention, the hinge connection box 21 and the panel fixing box 22 are separately provided, And the like.

The filling material 30 is placed in the hinge connection box 21 of the hinge frame 20 using concrete or mortar and fixes the anchor bar set 40 in the hinge frame 20. [

The anchor bar set 40 is a material that binds the base block 10 and the frame 210 of the arch portion 200 and is constructed by assembling a plurality of anchor bars 41 and anchor plates 42, for example. When the anchor bar set 40 is installed in the hinge connection box 21 of the hinge frame 20, a part of the anchor bar 41 is inserted into the hinge connection box 21 with the anchor plate 42 as a center And the other part is projected to the outside and bound to the fixing plate 211 of the frame 210 of the arch part 200 by the nut 43. [ The anchor plate 42 is provided with at least one fill hole so that the filler 30 can be filled into the hinge connection box 21 after the anchor bar set 40 is installed in the hinge connection box 21.

When the curing of the base block 10 is completed, the hinge connection box 21 and the panel fixing box 22 of the plurality of hinge molds 20 are alternately repeated so as to be installed at the arrangement position of the frame 210 and the panel 220 do.

A reinforcing bar 50 may be inserted into the hinge connection box 21 to reinforce the hinge. The rebar 50 is made up of a combination of, for example, a bar reinforcement and a longitudinal rebar.

According to such a hinged base structure, since the frame 210 of the arch portion 200 is not directly welded to the base block 10 and is not fastened directly to the fastener, bending moment is not generated at the contact portion between the arch portion and the base portion It is possible to perform hinge behavior that generates only horizontal force and vertical force.

As shown in FIG. 6, the method of constructing the base of the hinged portion according to the present invention is as follows.

(S10) Concrete foundation block construction.

In order to construct the composite arch structure, the foundation block 10 is installed on both sides of the road in the width direction, the formwork is installed according to the shape of the foundation block 10, the hinge frame 20 is fixed to the formwork, And a hinge frame (20) to complete molding of concrete in the foundation block (10).

The concrete is poured into the mold, and when the mold is cured, the mold is demolded, and thus the hinge frame 20 is installed in the foundation block 10.

Accordingly, since the hinge frame 20 also serves as a mold, it is possible to eliminate the mold releasing operation of the mold and to increase the coupling force between the hinge frame 20 and the base block 10. [

(S20) Reinforcement of the hinge portion.

The reinforcing bar 50 is inserted into the space of the hinge connection box 21 of the hinge frame 20. Of course, this step is a step that goes only when the reinforcing bar 50 is applied.

(S30) Install anchor bar set.

The anchor bar set 40 is a material that binds the base block 10 and the frame 210 of the arch part 200. The anchor bar set 40 is used to open the hinge connection box 21 of the hinge frame 20 A part of the anchor bar 41 with the anchor plate 42 as a center is fixed to the hinge frame 41 by means of the hinge frame 41. [ 20 and the remaining portion thereof is projected to the outside and bound to the fixing plate 211 of the frame 210 of the arch portion 200. [

(S40) Hinge frame Filler filling.

The filler 30 is filled in the hinge connection box 21 of the hinge frame 20 through the fill hole formed in the anchor plate 42 of the anchor bar set 40. [ When the filling material 30 is cured, the anchor bar set 40 is fixed via the filling material 30. At this time, since the block formed by the filling material 30 is not fixed to the base block 10, 200 can be hinged.

The construction of the foundation structure is completed through the curing of the filler material 30, and then, as shown in FIG. 7, the composite arch structure is completed by the following process.

(S50) Construction of arch frame on foundation structure.

The anchor bar 41 protruding from the anchor plate 42 of the anchor bar set 40 of the finished base structure 10 is inserted into the frame 210 so as to pass through the fastening holes formed in the fastening plate 211 of the frame 210. [ And a nut is fastened to the anchor bar 41 passing through the fastening hole, so that the frame 210 is installed on the foundation structure 100.

(S60) Install the center frame.

When the frame 210 is installed on the base structure 100 on both sides through the previous process, the space between the frames 210 on both sides, that is, the central part of the arch part is empty and both sides of the center frame 210-1 are connected to the base structure 100, Side frame 210 to complete an arched frame. Since this process is known from Patent Document 1, etc., a detailed description thereof will be omitted.

(S70) Panel mounting.

After the installation of the arched frame is completed, the panel 220 is installed. At this time, the panel 220 adjacent to the base structure 100 is inserted into the panel fixing box 22 formed in a groove shape in the base block 10.

The hinge frame 20 having the hinge connection box 21 and the panel fixing box 22 has been heretofore used. However, the present invention is not limited to the use of the hinge frame 20 having such a structure, It is also possible to directly form the groove-like hinge connection portion 11 and the panel fixing portion 12.

The hinge connection portion 11 and the panel fixing portion 12 are directly formed on the foundation block 10 by forming a mold to fit the foundation block 10 having such a structure and demolding the concrete after curing and curing .

The filler 30 and the anchor bar set 40 are used in the same manner even if the hinge connection part 11 and the panel fixing part 12 are integrally formed on the foundation block 10. [

The hinge connection part 11 and the panel fixing part 12 are connected to each other and of course, a structure in which the panel 220 is clogged with each other is also possible.

The arch part applied to the present invention can be applied to various arch parts of the arch-arch composite structure, and is preferably described in Patent Document 1, and will be described without specific drawings.

The arcuate portion 200 includes a frame 200 formed in an arcuate shape in a lattice form when viewed from the front, a plurality of panels 220 coupled to the upper portion of the frame 200, And a concrete connection part 230. That is, since the frame 210 is made of a steel material and is formed in an arch shape and has a large strength, the thickness of the panel 220 can be minimized, and the stress can be easily dispersed with respect to the earth pressure and load.

The frame 210 is composed of a plurality of molds arranged in a line at regular intervals along the longitudinal direction of the tunnels and a plurality of cross beams arranged in a direction orthogonal to the molds between the molds, . The lateral view is disposed between the molds, and both end portions are fixed to the molds, respectively. That is, since the frame 210 composed of the mold and the beam is in a lattice form, a plurality of spaces are formed, and the panel 200 is mounted in the space. Although one arch beam may be used for the mold, it is preferable that a plurality of beams are combined in an arch shape in consideration of manufacturing, transportation and storage. The mold is made of steel having an "I" shaped cross section, and can be joined by welding or through bolts and nuts. The frame 210 has a strength and a size that can prevent the collapse of the tunnel and the structural dynamics of the mold and the lateral view.

The panel 220 covers and closes the upper part of the frame 210. In order to reinforce the strength of the frame 210, a lattice type reinforcing bar (the reinforcing bars are connected to the concrete connection part 230 when the concrete connection part 230 is installed) 220) is inserted, and various shapes such as a square shape are possible. The panels 220 are joined together by the casting of the frame 210 with the studs and the spotting concrete to induce a synthetic action. In the cross direction of the frame 210, the panels 220 between the beams intersect with each other, Lt; / RTI >

A ring part may be formed at the end of the inner reinforcing bar 220 so as to bind adjacent panels 220 so that the rings can be coupled to each other and a coupler for connecting the reinforcing bars inside the adjacent panel 220 to each other It can also be used. In the case of the annular portion, the shape of the annular portion can be any shape that can be fitted to each other.

The concrete connection part 230 combines the frame 210 and the panel 220 so as to reinforce the strength and the order function. The concrete connection part 230 is placed between the panels 220 after the frame 210 and the panel 220 are coupled. Of course, since the concrete connection portion 230 is poured at the site and cured, the curing period is not long since the area of the cast-in-place portion is very narrow, so that the construction period is shorter than when the concrete is installed at the site by placing the concrete .

A concrete connection portion (not shown) is formed on the upper surface of the mold of the frame 210 so that the coupling force between the frame 210 and the panel 220 is increased during the field installation of the concrete connection portion 230 so that the frame 210 and the panel 220 are not separated from each other. 230 may be provided. That is, the mold and the panel 220 are connected to the concrete connection part 230 via the stud and the reinforcing bars. Hooks may be provided on both sides of the panel 220 so that the panel 220 is not slipped on the inclination of the frame 210. Of course, the stud may be a separate hook-only hook. Further, the panel 230 is not limited to the hook-type fixing structure, but may be fixed to the mold through the "L" In the case where the mold is curved, the opposite end of the panel 220 is seated on the upper side of the cross bar, so that the cross bar functions as a mold, The formers are formed below the opposite ends of the panel 220 so that the concrete of the concrete connection part 230 is poured.

While the present invention has been particularly shown and described with reference to exemplary embodiments thereof, it is to be understood that the invention is not limited to the disclosed exemplary embodiments. On the contrary, those skilled in the art will appreciate that many modifications and variations of the present invention are possible without departing from the spirit and scope of the appended claims.

100: foundation structure,
10: concrete foundation block, 11: hinge connection
12: Panel fixing,
20: hinge frame, 21: hinge connection box
22: panel fixing box, 30: filler
40: Anchor set, 50: Rebar
200: Archibu,
210: frame, 220: precast concrete panel

Claims (5)

Both side portions of the arch portion 200 including the frame 210 of the steel material and the precast concrete panel 220 installed on the frame are installed on both sides in the width direction of the double- However,
A concrete foundation block 10;
A hinge connection part formed by alternately repeating grooves in the concrete base block along the traveling direction of the road so that the frame 210 of the arch part 200 is hinge-connected and the precast concrete panel 220 of the arch part A panel fixing part to be inserted and fixed;
An anchor bar set (40) fixed to the hinge connection part and fastened to a fixing plate (211) formed at an end of the frame of the arch part;
And a filler (30) filled in the hinge connection part and fixing the anchor bar set to enable hinge movement of the arch part. The hinge foundation structure of the composite arch structure using the steel frame and the precast concrete panel . The hinge connector according to claim 1, wherein the hinge connection part and the panel fixing part are formed by a hinge frame (20) that also functions as a formwork, and the hinge frame has a hinge connection box (21 And a panel insertion box (22) formed at one or more sides of the hinge connection box and in which the precast concrete panel is inserted. The precast concrete panel and the arch construction using a steel frame Hinged foundation structure of a structure. A first step of constructing a hinged foundation structure on both sides of the composite arch structure;
A second step of installing the frame 210 of the composite arch structure between the hinged foundation structures constructed through the first step and installing the precast concrete panel 220 on the frame,
In the first step, the concrete base block 10 is constructed by pouring concrete, and the concrete base block is constructed so that the concave hinge connection portion and the panel fixing portion are alternately repeatedly formed on the concrete foundation block. , And an anchor bar set (40) is installed on the hinge connection part formed through the step 1-1, and the anchor bar set is fixed by filling the hinge connection part with a filler material.
In the second step, the fixing plate 211 formed on the end of the frame 210 of the arch-arch structure is joined and fixed to the anchor bar set through the step 1-2 to construct the arcuate skeleton 2-1, a step of installing the precast concrete panel on an arched skeleton constructed through the step 2-1, and inserting an end of the precast concrete panel into a panel fixing part formed on the concrete foundation block 2-2 < / RTI > step. The method of constructing the composite arch structure using the hinged foundation structure of the composite arch structure using the steel frame and the prefabricated concrete panel. [6] The method according to claim 3, wherein the step 1-1) comprises installing a box-type hinge frame (20) as a formwork to construct the hinge connection box (21) as the hinge connection part and the panel fixing box Construction method of composite arch structure using hinged foundation structure of composite arch structure using precast concrete panel and steel frame. [6] The method of claim 3, wherein the step 1-1) comprises the step of constructing a groove-like hinge connection part (11) and a panel fixing part (12) on the concrete foundation block by using a formwork. Construction method of composite arch structure using hinged foundation structure of arch structure.

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