KR101483456B1 - Steel suspension type slab for a bridge and the construction method using the same - Google Patents

Abstract

The present invention relates to a structure of a bridge wherein a modularized unit floor slab is assembled at a site while a cable is capable of supporting the modularized unit floor slab. More specifically, the present invention relates to a plurality of suspension floor slabs supported by a cable and constituting a floor slab of a bridge. Each of the suspension floor slabs comprises a main body portion, and a front surface coupling portion and a rear surface coupling portion respectively installed at front and rear ends of the main body portion. An insertion space portion having a main cable inserted is formed at both side portions of the suspension floor slab in the horizontal direction. A cable mounting stand having a cable groove formed is fixed and installed at the main body portion in the insertion space portion of the main body portion, and a cable protection stand surrounding the main cable inserted into the cable groove is attached and installed at the cable mounting stand. A movable roller is detachably installed inside or outside the insertion space portion located at the front surface coupling portion and the rear surface coupling portion, and each of the front surface coupling portion and the rear surface coupling portion comprises a coupling plate having a plurality of fastening bolt holes, and a plurality of vertical connection pieces connecting the coupling plate to the main body portion. A work space portion is formed at an upper portion, and a guide front end protrusion is formed at the front surface coupling portion. A guide front end recessed groove having a shape corresponding to the guide front end protrusion is formed at the rear surface coupling portion.

Description

Technical Field [0001] The present invention relates to a modular steep slope bottom plate and a method of constructing the same using a steel suspension type slab for a bridge and a construction method using the same,

The present invention relates to a structure of a bridge that allows a cable to be supported while assembling a modularized unit floor in the field. More specifically, a bottom plate is made of a steel material to reduce its own weight, And a method of constructing a bridge using the same.

As human activities are diversified, human activities that can occur in the field are also diverse. Especially in the modern age, interest in health has increased, and activities in the outdoors, which were mainly for walking purposes for the past, are jogging, hiking, trekking, cycling And more diversified for leisure purposes.

As a result, roads and bridges that can be used safely and comfortably by pedestrians and cyclists are continuously constructed around rivers and valleys. However, it is difficult to construct pillars in valleys, rivers and wetlands, There are many cases.

Accordingly, there have been proposed methods of constructing a bridge without setting up a pillar in the middle, for example, the upper structure of a bicycle and a sidewalk bridge using cables and the method of construction thereof, as disclosed in Korean Patent No. 1181232, .

The above prior art bridges are characterized in that a cable is provided between the bridge piers and the piers and the precast concrete segments manufactured in advance at the factory are successively installed on the cables and the precast concrete segments are pressed by the hydraulic jacks, It is installed in the way of introducing.

This construction method can be very advantageously applied to a terrain where a column such as a valley can not be installed because it does not require a column to be installed in the middle of the bridge because the bottom structure is supported by the tensile force of the cable.

However, as shown in FIG. 1, the concrete segments in the prior art are manufactured from reinforced concrete with reinforcing bars embedded therein, so that they are supported only by the tensile force of the cables. The length of the span of the span is not only limited but also the transportation and the heavy construction are not easy and safety accidents are likely to occur.

In addition, when the hydraulic jack is removed, it is easy to securely replace the support device without causing loss of the introduced prestress when the hydraulic jack is installed to introduce the compressed prestress. not.

Also, it is troublesome to pour the concrete at a high site in an empty space such as a part where the hydraulic jack is removed, a recessed portion through which the upper cable of each segment passes, and the like.

KR 10-1181232 B1

SUMMARY OF THE INVENTION The present invention has been made to solve the above problems of the prior art, and it is an object of the present invention to reduce the deflection of the bottom plate by reducing the weight of the bottom plate, thereby improving the structural and psychological stability and improving the workability, The present invention has been made to solve the above problems.

According to a most preferred embodiment of the present invention for solving the above problems, in a plurality of suspended bottom plates constituting a bottom plate of a bridge supported by a cable, the suspended bottom plate includes a main body portion, Wherein a bottom surface of the hanging bottom plate is formed with an insertion space in which the main cable is inserted in the front and back directions; A cable rest is formed on the main body and a cable protector for guiding the main cable inserted into the cable recess is attached to the cable rest; The front and rear joining portions are provided with a joining plate having a plurality of fastening bolt holes and a plurality of joining plates having a plurality of joining plates for connecting the joining plate to the main body portion, A vertical connecting piece, and a work space is formed in an upper portion thereof; A guide shear protrusion is formed on the front joint portion and a guide shear groove having a shape corresponding to the guide shear protrusion is formed on the rear joint portion.

According to another embodiment of the present invention, there is provided a method of constructing a bridge in which a bottom plate is supported by a cable, the method comprising the steps of: a) constructing an alternating and ground anchor; b) alternately installing a supporting main cable; c) mounting a prefabricated hanging deck to the main cable in bulk; d) attaching a cable protector and a protective connection plate for preventing deviation of the main cable; e) The suspension plate is moved to one side of the alternating side so that the guide shear projections of the front joint are inserted into the guide front groove of the rear joint, and the two suspension plates are interposed, Closing the work space portion with the cover plate after removing the moving roller, and connecting the two suspension plates; f) completing the installation of the hanging deck by repeating steps c) to e); g) inserting and stretching the PC stranded wire in the sheath tube of the consecutive hanging deck, then injecting the grout into the sheath tube to complete the construction of the deck with the prestress introduced; and h) installing a bridge auxiliary facility such as a railing or the like. The method for constructing a bridge using the modular steel suspension base plate is provided.

The present invention prevents the main cable from being excessively deflected by making the suspension plate light in weight and enables a long span to be universally applied to various terrain conditions and facilitates transportation and installation.

In addition, the present invention makes it possible to construct a bridge of high quality by easily and accurately proceeding the connection between the hanging decks, and it is possible to reduce the construction period by minimizing site work such as concrete pouring work .

Further, since the steel sheet is used in the present invention, various types of treatments can be performed, thereby enabling the design of a cross section that minimizes the influence of typhoons and wind and rain.

1 is a cross-sectional view of a precast concrete segment of a suspension bridge according to the prior art.
FIG. 2 is a perspective view and a cross-sectional view of a modular steel suspension plate according to an embodiment of the present invention. FIG.
3 is an exploded perspective view illustrating the structure of the suspension plate.
4 is a cross-sectional view showing each embodiment in which a moving roller is installed on the suspension bottom plate.
5 is a cross-sectional view for explaining an example in which the outer surface of the suspension plate is inclined.
FIG. 6 is a cross-sectional view of various embodiments of a suspension plate according to the present invention for securing stability against wind load.
FIGS. 7 to 15 are views illustrating a method of constructing a bridge by using the modular steel suspension plate according to the present invention.

Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings. In the following description of the present invention, however, it is to be understood that the present invention is not limited to the disclosed embodiments.

FIG. 2 is a perspective view and a cross-sectional view of a modular steel suspension plate 100 according to an embodiment of the present invention, and FIG. 3 is a perspective view of the suspended bottom plate 100, Fig.

The bottom plate 100 is supported by a cable and includes a main body 10 as shown in Fig. 2, a front joining portion 20a provided at the front and rear ends of the main body 10, And a joining portion 20b.

As the suspension plate 100 according to the present invention is separated into the body 10 and the front and rear joints 20a and 20b, it is possible to perform a joint operation between the adjacent suspension plates 100 So that the work space S can be formed.

In addition, on both side portions of the suspension plate 100 according to the present invention, an insertion space portion 30 into which the main cable 40 is inserted is formed on the bottom surface in the longitudinal direction. Therefore, the insertion space portion 30 is divided into a portion located at the main body portion 10 and a portion located at the front and rear surface joint portions 20a and 20b.

A main cable 40 supporting the bottom plate P is inserted into the insertion space 30 formed on the bottom surface of the suspension plate 100. The suspension plate 100 mounted on the main cable 40, A moving roller 31 is installed on the hanging bottom plate 100 at both ends of the insertion space portion 30 so as to be smoothly moved.

Fig. 4 shows each embodiment in which the moving roller 31 is installed on the suspension bottom plate 100. Fig. 4, the moving roller 31 is configured to be inserted into the insertion space 30 located at the front and rear bonding portions 20a and 20b as shown in FIG. 4 (a) And the protrusions may be formed so as to protrude from the outer side of the insertion space portion 30 located at the front and rear bonding portions 20a and 20b, that is, the front and rear surface bonding portions 20a and 20b as shown in FIG. 4B And may be appropriately selected depending on the manufacturing conditions of the suspension bottom plate 100 and the conditions of the site.

 The moving roller 31 is removed and recycled after completing the function of the movement of the suspension bottom plate 100. [ Therefore, whether the movable bottom plate 100 is installed in an insertion manner or in a protruding manner, the moving roller 31 must be installed so as to be able to be removed afterward.

When the moving rollers 31 are installed in an insertion manner, it is troublesome to remove the moving rollers 31 in a narrow space after connecting the suspension bottom plates 100. However, It is possible to speed up the work.

On the other hand, when the moving roller 31 is installed in a protruding manner, there is no space restriction for the installation and removal of the moving roller 31, so that the production of the suspension bottom plate 100 and the removal of the moving rollers can be easily carried out However, the construction of the bottom plate P may be delayed in the point that the suspension bottom plates 100 can be connected only after removing the moving roller 31.

As shown in FIG. 3, in the inserting space portion 30 located on the inside of the hanging bottom plate 100 where the moving roller 31 is not provided, that is, the main body portion 10, a cable The base 32 is fixed to the main body 10.

The cable groove 32a of the cable rest 32 restrains the main cable 40 from shaking right and left in the insertion space 30 and at the end of the cable groove 32a, Even when a plurality of main cables 40 are placed in one insertion space 30, the main cables 40 are not tangled or interfered with each other, So that the moving operation of the suspension bottom plate 100 is smoothly performed.

Therefore, when a plurality of the main cables 40 are inserted into one insertion space 30, the cable grooves 32a formed in the cable cradle 32 must be equal to the number of the main cables 40 do.

When the suspension plate 100 is mounted on the main cable 40 and the main cable 40 is inserted into the cable groove 32a of the cable rest 32, A protector (33) is attached to the cable rest (32) so as to surround the main cable (40).

The cable protector 33 forms a movement path of each main cable 40 together with the cable rest 32 so that when the suspension bottom plate 100 moves in a state of being mounted on the main cable 40, It is possible to prevent the main cable 40 from being detached from the predetermined position of the suspension plate 100, thereby facilitating the operation and safety.

In addition, a protective connection plate 34 may be further provided on the insertion space 30 on the bottom surface of the hanging plate 100 including the portion where the cable protector 33 is installed. The protective connection plate 34 protects the inside of the insertion space portion 30 and prevents the generation of vortex caused by the insertion space portion 30 and connects both side portions and the center portion of the main body portion 10, Thereby improving the rigidity of the base 100.

The front joining portion 20a and the rear joining portion 20b located on the front and rear sides of the main body 10 can integrate the adjacent hanging bottom plates 100 by only bolting without concrete being laid in the field, It makes construction very easy.

The front and rear joining portions 20a and 20b include a joining plate 21 having a plurality of fastening bolt holes 21a and a plurality of vertical connecting pieces 22 connecting the joining plate 21 to the body portion 10 ).

The joining plate 21 is bolted to the joining plate 21 of the adjacent hanging plate 100 and the joining bolt hole 21a to integrate the two joining plates 100. At this time, The plate 21 and the vertical connecting piece 22 form a work space S having an opened upper portion, thereby facilitating the bolt fastening operation.

On the other hand, since the operation of connecting the adjacent hanging decks 100 to each other as in the prior art is performed in the air with the hanging deck 100 mounted on the main cable 40, the two hanging decks 100 ) Is not easy to match.

Accordingly, in the present invention, the two hanging decks 100 are easily positioned at the correct positions by simply moving the hanging deck 100 and inserting it into the already moved hanging deck 100, So that the installation work can be performed more easily.

A guide shear protrusion 23 is formed on the front joint portion 20a of the suspension plate 100 according to the present invention and a guide shear groove 24 having a shape corresponding to the guide shear protrusion 23 is formed on the rear joint portion. . As shown in FIG. 2, the guide shear protrusion 23 is formed by bending the junction plate 21 so as to be tapered and convex in a trapezoidal shape, and the guide plate 21 is bent in a reverse trapezoidal shape Tapered and concave.

The guide shear projections 23 of the hanging bottom plate 100 which is subsequently moved to the guide front end recesses 24 of the moved hanging bottom plate 100 are inserted so that the two hanging bottom plates 100 are moved to the right and left So that the fastening bolt holes 21a of the two adjacent fastening plates 21 are in contact with each other so that the bolt fastening operation is facilitated.

At this time, the guide shear projections 23 and the guide shear grooves 24 not only guide the accurate joining between the suspension bottom plates 100 as described above, but also contribute to securing the integrity of the bottom plate P through engagement .

When the connection to the hanging decks 100 is completed, a prestress is introduced for a bottom plate P configuration in which they act as one piece. To this end, the hanging deck 100 according to the present invention is provided with at least one The above-mentioned PC type strand fixing means is provided.

The above-described PC-type strand fixing means can prevent the concentrated load from being generated on any one side of the bottom plate P by dispersing the stress generated by the strained PC strand 50 on each of the suspension bottom plates 100, To ensure stability.

This attachment type PC strand fixing means is provided with a sheath pipe 51 at the bottom of the suspension bottom plate 100 and having individual fixing means at both ends of the sheath pipe 51, The sheath pipe 51 may be installed on the bottom surface of the hanging bottom plate 100 and the sheath pipe 51 may be embedded so that the sheath pipe 51 is embedded. A concrete part 52 is formed on a part of the bottom surface of the sheath pipe 51 and a PC stranded wire 50 is installed and tightened in the sheath pipe 51. Then, grout is filled between the sheath pipe 51 and the PC stranded wire 50 The concrete part 52 is integrated with the sheath pipe 51 and the PC stranded wire 50 so that the stresses of the PC stranded wire 50 are shared by the respective suspended bottom plates 100.

The reinforcing ribs 11 in the forward and backward direction and the reinforcing water level plate 12 in the left and right direction can be provided in a lattice shape on the bottom surface of the main body portion 10 of the suspension bottom plate 100, The reinforcing ribs 11 can be used as a substitute for the formwork when the concrete of the reinforcing rib 52 is poured.

On the other hand, excessive sagging of the completed bridge to the bottom plate P not only increases the load on the main cable 40 with respect to the load, but also causes anxiety and inconvenience of the user.

Therefore, the suspension plate 100 according to the present invention minimizes deflection of the main cable 40, thereby providing structural stability and psychological stability of the user.

For this purpose, the suspension plate 100 according to the present invention includes a steel plate (not shown) except for the concrete portion 52 for dispersing the tensile stress of the PC stranded wire 50 in order to minimize the load acting on the main cable 40 It has a hollow structure with lightweight materials such as aluminum. The suspension plate 100 can greatly reduce its own weight as compared with the conventional precast concrete segment shown in FIG. 1, thereby facilitating the transportation of the suspension plate 100, It is possible to greatly reduce the load imposed on the main cable 40 and to reduce the deflection of the bottom plate P.

5 (a), the outer surface of each joining plate 21 of the front and rear joining portions 20a and 20b is connected to the vertical axis of the hanging bottom plate 100, (OA) may be configured to have an inclination angle symmetrical with respect to each other. The configuration of the joint plate 21 having such an inclination angle makes it possible to reduce the deflection on the connecting portion by connecting the hanging bottom plates 100 in the shape of an arch when they are connected.

In contrast, the suspension bottom plate 100 according to the present invention is connected in a shape of an inverse arch that matches the curvature of the main cable 40 when connecting the suspension bases 100 as shown in FIG. 5 (b) The outer surfaces of the joining plates 21 of the front and rear joining portions 20a and 20b are symmetrical with respect to the vertical axis OB of the suspension bottom plate 100 so that the inclination angle beta As shown in Fig. The inclination angle? In the opposite direction is prevented from occurring in the lower part of the connecting portion of the hanging bottom plate 100 when the main cable 40 is mounted on the main cable 40, It is possible to have a high efficiency for prestressing when it is desired to tense with a strand.

In addition, the suspension plate 100 of the present invention, which is formed of a steel plate as described above, may have various cross-sectional shapes to minimize the influence on wind loads. For example, by making the travel distance of the wind longer than the upper side of the suspension bottom plate 100, the load acting on the suspension bottom plate 100 due to the difference in pressure generated in the upper and lower portions of the suspension bottom plate acts downward , The stability of the bridge can be improved by preventing the bottom plate (P) from slipping even if the wind blows from the side.

6 is a cross-sectional view showing various embodiments of the suspension bottom plate 100 for securing stability against wind load.

As shown in FIGS. 7 to 15, a method of constructing a bridge using the modular steel suspension basin 100 according to the present invention has been described as follows: a) Construction of an alternation 60 and a ground anchor 61); b) installing the main cable (40) in the shift (60); c) mounting the hanging deck 100 to the main cable 40; d) attaching the cable protector and protective connection plate (34); e) moving and connecting the hanging deck 100; f) completing the installation of the suspension bottom plate 100 by repeating the steps c) to e); g) completing the construction of the bottom plate (P) by introducing a prestress into the continuous suspended bottom plate (100); h) installing a bridge auxiliary facility such as a railing. This will be explained step by step.

a) constructing the shift 60 and the ground anchor 61 (see Fig. 7);

An alternate 60 is installed at both points where the bridge is to be installed and a ground anchor 61 is installed so that the main cable 40 installed in the next step can be sufficiently supported.

b) installing the main cable 40 in the shift 60 (see Fig. 8);

When the construction of the alternation 60 and the ground anchor 61 is completed, a main cable 40 supporting the bottom plate P is installed on the upper portion of the alternation 60. At least one end side of the main cable 40 provided in the shift 60 is provided with means for tightening the main cable 40 so that the main cable 40 is tightened so as to be tightened and fixed there.

The main cable 40 should be installed in two rows so as to support both sides of the bottom plate 100, and may be provided in a plurality of rows for each row.

c) mounting the hanging deck 100 to the main cable 40 (see Fig. 9);

And a step of mounting the suspension plate 100 prepared in advance at the factory on the main cable 40 in the field.

The suspension plate 100 is mounted on the main cable 40 with the moving roller 31 mounted thereon and the cable protector 33 and the protective connection plate 34 not being attached.

At this time, the respective strands of the main cable 40 are inserted into the cable grooves 32a provided in the cable rest 32 and positioned on the lower surface of the moving roller 31 at both the front and rear ends of the suspender bottom plate 100.

d) attaching the cable protector 33 and the protective connection plate 34 (see Fig. 10);

A step of attaching the cable protector 33 and the protective connection plate 34 by means of bolts or the like in order to prevent the detachment of the main cable 40 located in the insertion space portion 30 of the suspension bottom plate 100.

The cable protector 33 has a shape symmetrical with the cable cradle 32 that is already fixed to the suspension bottom plate 100 and the main cable 40 is inserted into each strand, The cable grooves 32a provided in the cable protector 33 and the cable cradle 32 can be moved only in the forward and backward direction while restricting the main cable 40 from being released to the outside Thereby forming a tubular movement passage having a tubular shape.

When the attachment of the cable protector 33 is completed, a protective connection plate 34 (not shown) for connecting both side portions and the center portion of the main body portion 10 while closing the insertion space portion 30 formed on the bottom surface of the suspension bottom plate 100 So as to prevent the vortex caused by the insertion space portion 30 from being generated even when wind is blown into the bridge.

e) moving and connecting the hanging deck 100 (see Figs. 11 and 12);

The suspension plate 100 mounted on the main cable 40 is moved to one side of the shift 60 so that the guide shear projection 23 of the front joint portion 20a is guided to the guide front end groove 24 of the rear joint portion 20b The joining plates 21 are inserted into the work space S through the work space S with the two hanging bases 100 interposed therebetween so as to insert the joining plates 21, And the space portion S is closed by the cover plate 13 to connect the two suspension plates 100 to each other.

The suspension plate 100 in which the attachment of the cable protector 33 and the protective connection plate 34 is completed and the main cable 40 is fixed can be easily moved along the main cable 40 with the help of the moving roller 31 .

As shown in FIG. 11, the moving suspension plates 100 connect the fastening bolts 21b to the fastening bolt holes 21a provided in the respective fastening plates 21 to connect the fastening bolts 21b. The fastening bolt holes 21a of the fastening bolts 21b are inserted into the fastening bolt holes 21a of the fastening bolt holes 21a of the fastening bolt holes 21a of the fastening bolts 21, .

Thus, the guide shear projections 23 and the guide shear grooves 24 do not need to adjust the horizontal movement of the suspension bottom plate 100 by fixing the position of the suspension bottom plates 100 to be connected with respect to the horizontal direction in a fixed manner And the position of the fastening bolt holes 21a provided in the respective joint plates 21 may be wobbled in the state of being supported by the main cable 40 with respect to the vertical direction.

Therefore, the suspending jig 70 for fixing the position of the connecting portion can be further installed on each of the suspension bases 100, and FIG. 12 illustrates this embodiment.

12, a suspending jig 70, which can be fastened by a long bolt 71 to the top and rear upper surfaces of the suspension bottom plate 100 before the suspension bottom plate 100 is mounted on the main cable 40, (See 1 in Fig. 12), when the mounting and moving of the hanging bottom plate 100 is completed and is engaged with the adjacent hanging bottom plate 100, the long bolts 71 are fastened to the temporary fixing jig 70 So that the two hanging decks 100 are temporarily fixed on the connecting portion without being moved vertically and horizontally (see (2) in FIG. 12). Since the hanging bottom plate 100 connected by the temporary fixing jig 70 and the long bolt 71 does not cause shaking, the fastening operation of the fastening bolt 21b and the removal operation of the moving roller 31 are performed smoothly (See (3) in Fig. 12). The work jig 70 is removed again and the work space S is closed by the cover plate 13 so that the connecting operation between the hanging bottom plates 100 .

f) completing the installation of the suspension bottom plate 100 by repeating the steps c) to e);

The method according to any one of the preceding claims c) to e), comprising the steps of: mounting the suspension plate 100 to the main cable 40; attaching the cable protector 33 and the protective connection plate 34; And the connecting operation between the suspension bottom plates 100 is completed to complete the installation of the suspension bottom plate 100 with respect to the entire bridges.

g) completing the construction of the bottom plate P by introducing a prestress into the continuous suspended bottom plate 100 (see Fig. 13);

When the installation of the suspension bottom plate 100 is completed, the PC stranded wire 50 is inserted into the sheath pipe 51 of the consecutive suspension bottom plate 100, and after the PC stranded wire 50 is tightened, grout is introduced into the sheath pipe 51 To complete the construction of the bottom plate (P) into which the prestress is introduced.

If the span of the bridge is short, the above-mentioned prestressing operation can be progressed with respect to the entire bottom plate P. However, when a prestress is to be applied to the long span at a time, a very large tension force is required. It is difficult to perform an efficient prestressing operation such as requiring a larger tension device, and deformation may occur in the joint portions and the fixing portions of the suspension plate made of steel.

Therefore, if the length of the span is long, the bottom plate P is divided into several sections and a prestressing operation is performed for each section. However, it is necessary to ensure the integrity of the bottom plate P by disposing the PC stranded wires so that at least one of the suspension decks located at the boundary of both sections overlaps the both sections. Fig. 14 is a conceptual diagram for explaining this example.

14, the bottom plate P is divided into a central portion and both end portions. First, a prestressing operation is performed on the center portion (1), and a preseeding operation is performed on both end portions (2) .

When the main cable 40 and the PC stranded wire 50 are elongated by the temperature change or the creep phenomenon after the construction of the bottom plate P is completed, the respective hanging bottom plates 100 are centered, A large clearance may be generated at both ends of the bottom plate P so that it is necessary to prevent each of the suspension bottom plates 100 from being tilted as described above by fixing the bottom plate 100 individually to the main cable 40 have.

For this, the work of attaching the cable protector 33 and the protective connection plate 34 in the step d) is performed only at the temporary fastening for preventing the main cable 40 from being separated. In this step, The main cable 40 and the cable protector 33 may be tightly coupled to each other so that the main cable 40 and the cable protector 33 are integrated with each other. Various known means such as a wedge may be used as the means for integrating the main cable 40 and the cable protector 33.

h) installing a bridge auxiliary facility such as a railing (see Fig. 15);

When the construction of the bottom plate P of the bridge is completed using the modular steel suspension plate 100, the upper part of the bridge 60 is finished and the auxiliary facilities of the bridge are installed And the construction of the bridge is completed.

While the present invention has been particularly shown and described with reference to exemplary embodiments thereof, it is to be understood that the scope of the invention is not limited to the disclosed embodiments, but, on the contrary, It is obvious that it will be possible to carry out various modifications thereof. It is therefore intended that such modifications are within the scope of the invention as set forth in the claims.

10: main body 20a: front joint
20b: rear bonding portion 21: bonding plate
22: vertical connecting piece 23: guide shear projection
24: guide shear groove 30: insertion space part
31: moving roller 32: cable holder
33: Cable protector 34: Protective connection plate
40: main cable 50: PC strand
51: Sheath tube 52: Concrete part
60: shift 70: hypothesis jig
100: Suspended bottom plate S: Workspace part

Claims (9)

In a plurality of suspended bottom plates 100 constituting a bottom plate P of a bridge supported by a cable,
The suspension plate 100 includes a main body 10 and a front joint portion 20a and a rear joint portion 20b separately provided at the front and rear ends of the main body portion 10, The above-described PC stiffener fixing means is provided,
The insertion space portion 30 into which the main cable 40 is inserted and the protection connection plate 34 which closes the insertion space portion 30 are formed and installed in the front and back directions on the bottoms of both side portions of the suspension bottom plate 100, ; A cable cradle 32 having a cable groove 32a formed therein is fixed to the main body 10 and a cable groove 32a is formed in the cable cradle 32, A cable protector 33 for covering a main cable 40 to be inserted into the main body 40; A moving roller 31 is disposed inside the insertion space part 30 located at the front and rear surface joining parts 20a and 20b so as to be post-
The front and rear surface joining parts 20a and 20b include a joining plate 21 having a plurality of fastening bolt holes 21a and a plurality of vertical connecting pieces 22 connecting the joining plate 21 to the main body part 10 , And a work space S having an open upper portion is formed;
The front joining portion 20a is formed with a guide shearing protrusion 23 which is folded and folded in a trapezoidal manner and convexed so that the rear joining portion 20b has a shape corresponding to the guide shearing protrusion 23 Characterized in that the guide shear grooves (24) are tapered and recessed in an inverted trapezoidal shape due to the bending of the joint plate (21). delete delete delete The method according to claim 1, wherein the fixing PC strand fixing means comprises a concrete part (52) laid on a part of the bottom of the suspension bottom plate (100), a sheath pipe (51) embedded in the concrete part Wherein a PC stranded wire (50) is installed in the sheath pipe (51) and made of a grout material for integrating the sheath pipe (51) and the PC stranded wire (50) after being strained. delete A method of constructing a bridge in which a bottom plate (P) is supported by a cable,
a) constructing an alternating (60) and ground anchor (61);
b) installing a supporting main cable (40) in the shift (60);
c) mounting the suspended bottom plate 100 according to claim 5 onto the main cable 40 in a preliminary manner;
d) attaching a cable guard and a protective connection plate (34) for preventing deviation of the main cable (40);
e) The suspension bottom plate 100 is moved to one side of the shift 60 so that the guide front end protrusion 23 of the front side joint portion 20a is inserted into the guide front end groove 24 of the rear end joint portion 20b. The joining plates 21 are brought into contact with each other with the fastening bolts 21b through the work space S while the bottom plate 100 is in contact with the work space S, Closing the two hanging decks (100) with the cover plate (13);
f) completing the installation of the suspension bottom plate 100 by repeating the steps c) to e);
g) The PC strand 50 is inserted and tightened in the sheath tube 51 of the continuous suspension bottom plate 100 and grout is injected into the sheath tube 51 to form a bottom plate P having the prestress introduced therein. Completing the construction;
and h) installing a bridge auxiliary facility such as a railing or the like. The method for constructing a bridge using the modular steel suspension plate. delete The method of claim 7, wherein the prestressing operation for tilting the PC stranded wire (50) in step g) is performed by separating the bottom plate (P) into a central portion and both end portions, Is subjected to a prestressing operation with respect to the central portion and then subjected to a prestressing operation at both end portions, characterized in that at least one of the two ends Construction method of bridges used.

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