KR101080942B1 - Portable pretension making apparatus and prestressed concrete structure making method using the same - Google Patents

Abstract

PURPOSE: A movable pretension manufacturing device and a prestressed structure manufacturing method using the same are provided to more efficiently install equipment and manufacture a prestressed concrete structure at lower cost. CONSTITUTION: A movable pretension manufacturing device comprises a base(100), a reaction frame, a fixing block, and a tension block. The base is extended in a longitudinal direction to manufacture a plurality of prestressed concrete structures in parallel. A form through which a tension member is extended in the longitudinal direction is installed on the top of the base. The reaction frame comprises concrete filled steel tubes(210) which are detachably installed to both sides of the base and a horizontal connection member(220) which connects the concrete filled steel tubes. The fixing block is installed on one end of the reaction frame to fix one end of the tension member. The tension block is installed separate from the other end of the reaction frame where the other end of the tension member fixed to the fixing block is anchored.

Description

PORTABLE PRETENSION MAKING APPARATUS AND PRESTRESSED CONCRETE STRUCTURE MAKING METHOD USING THE SAME}

The present invention relates to a mobile pretensioning device and a method for manufacturing a prestressed structure using the same. More specifically, the present invention relates to a method of manufacturing a PS structure using a pretensioning device, which enables a more economical manufacturing of a PSC structure by a pretensioning method.

The prestressed concrete method, developed to compensate for the shortcomings of reinforced concrete structures, is based on the pretension method and post-tension method according to the prestressing method that introduces compressive stress to concrete members. Separated by.

In this case, the pretension method is generally manufactured in a factory and transported to a site, and used as a main member in a construction site.

Figure 1a and Figure 1b is a view showing the member manufacturing by the conventional pretension method.

That is, one end of the tension member 30 disposed on the bed 20 is wedge fixed to the fixed end fixing plate 40 and the other end is fixed to the movable end fixing plate 50 to operate the jack 60. After tensioning the tension member (30) and assembling the steel formwork (10, mold), and then hit the concrete and cured well, when the concrete hardens to reach sufficient strength, the tension is slowly released to introduce prestress into the concrete member.

At this time, the method shown in Figure 1a is called a single mold method, as shown in Figure 1b by placing a plurality of molds (10, Mold) in series on the bed 20 and at the same time by introducing a pre-stress at a time pre-stressing several members The method that can be produced is called a long line method.

In contrast, post-tensioning methods, which are mainly applied in the field, fabricate members such as bridge girders, construction beam members, or slab members between long sections around the construction site, and then use prestresses to introduce prestresses to the members. It can be called a way to settle.

The pre-tension method is to tension the tension member in advance on the workbench, to produce the member, and to cut (relax, etc.) the tension member so that prestressing is introduced to the member. It can be said that prestressing is introduced by directly fixing to the member after the tension.

The pretension method has the following characteristics and advantages as compared to the posttension method.

First, since the post-tension method forms a duct so that the PS steel wire (tension material, PC stranded wire) can be inserted into the structure in advance, the PS steel wire is inserted therein, and the compressive stress is introduced into the structure through the tension of the PS steel wire. Material such as sheath pipe, PS steel wire fixing device and grouting milk in sheath pipe for duct formation are needed, and additional manpower for installing and constructing it.

On the other hand, in the pretension method, the PS steel wire is tensioned and fixed in advance by using the tension jack on the fixing table, and then the concrete is poured to obtain the required strength of the concrete. Then, the fixing device is released to introduce the compressive stress into the structure.

Therefore, the pretension type PS structure does not require a fixing device, and since the compressive stress is introduced into the PS structure by attaching the concrete and the PS steel wire, there is no need for the sheath pipe and the milk grouting material. In addition, there is no need for manpower for installing and constructing it.

Second, since the post-tension method is fixed to a part of the body of the girder by using the fixing device of the PS steel wire, the concentrated load acts on the fixing area, so that the crack is often generated.

In addition, the cross section of the concrete has a disadvantage in that the dispersion of the concentrated load in the fixing area. However, in the pretensioning method, since the compression prestress is introduced by the attachment of the PS steel wire and the concrete, there is no crack in the concrete section or the fixing area for forming the tension block.

Third, the post-tension system generates curvature friction and wave friction generated by the sheath tube and the PS steel wire, but the pretension system does not have a sheath tube, so it is not necessary to consider the frictional force and effective prestress introduced into the structure. You can increase your strength.

As described above, the pretension method has many advantages over the posttension method, but there are not many examples of using the actual pretension method.

The reason is that the pretensioning member manufactured in the factory has a lot of limitations because the length and weight of transport are considered.

Therefore, the large structure manufactured in the factory is not manufactured by the pretension method, but manufactured by reinforced concrete precast concrete segment and assembled by post-tension method in the field, the method of finishing the structure was inevitably used.

Therefore, it is difficult to apply the factory-made pretension method because the girder, the construction beam member, or the long slab member of the bridge member having a very large length and weight is the main component of the concrete having a large unit weight.

This problem can be solved by manufacturing the members in the field by the pretension method, but the structure manufactured by the pretension method requires expensive pretension manufacturing devices and facilities such as reaction table, reaction post, and compression bed. It was difficult to apply the pretension method at.

Furthermore, FIG. 1C illustrates a schematic diagram of lifting a member after the prestress is introduced by the pretension method. After fabricating the member by the pretension method, the tension member is cut (relaxed, etc.) to lift the member. After placing it in the vicinity, it is repeated to install the tension member and formwork again.

In this case, the lifting and stacking crane (lifting device) has to stay on site during the construction of the PSC structure. Application to the field was inevitably economical.

Accordingly, the present invention provides a mobile pretensioning apparatus and a prestressed structure manufacturing method using the same, which can manufacture PSC structure more efficiently by installing related equipment more efficiently and optimizing operation equipment in manufacturing PSC structure by pretension method. It is assumed that the technical problem to be solved.

The present invention to achieve the above technical problem

First, a mobile pretensioning device is provided, which provides a mobile pretensioning device that can be assembled and dismantled without constructing a fabrication table made of conventional concrete.

To this end, the pretensioning device is assembled and installed on the base of the concrete-filled steel pipe and the transverse connecting material (reaction frame) so that the structural load by the pretensioning operation can be sufficiently supported while being dismantled and reused continuously.

Second, in the pretensioning device, the tension block, which can fix the tension member and fix it after tension, allows the tension member to fix and fix a plurality of tension members more effectively.

To this end, the tension block and the stationary block may use a tension block that can accommodate a plurality of tension materials at the same time, but is easy to adjust the spacing of the tension materials.

Third, by repeatedly installing and dismantling the concrete-filled steel pipe and transverse connecting material assembled at the site, it is possible to manufacture the PSC structure continuously so that the lifting device such as a crane for lifting and loading the conventional PSC structure does not reside on the site. Economical PSC structure was made possible.

The scope of the present invention is shown by the following claims rather than the above description, and all changes or modifications derived from the meaning and scope of the claims and their equivalents should be construed as being included in the scope of the present invention. do.

As the present invention manufactures the PSC structure by the pretension method, compared to the post tension method,

First, compared to the post-tension method, the pre-tension method does not require a fixing unit and a sheath pipe, which saves not only material costs but also manpower and expenses for installing the same.

In addition, the pretensioning method does not require the installation of sheath pipes and anchorages compared to the post-tensioning method, and since it is settled by the attachment of the PS stranded wire and concrete, the curvature friction and the wave friction generated between the sheath pipe and the PS steel wire surface do not occur. ,

In addition, in the post-tension method, the PS steel wire is fixed to a part of the body of the structure by using a fixing device, so that a concentrated load acts on the fixing area and cracks are often generated. On the other hand, in the pretension method, since PS steel wire introduces prestress into the spherical body through concrete and adhesion, there is no anchorage zone, so that cracking of the anchorage does not occur.

In addition, in the pre-tension method, in the case of LONG-LINE method, the loss of tension material is inversely proportional to the number of structures, so the effective prestressing force can be increased in comparison with the post-tension method, and the PS strand can be reduced.

In addition, it is possible to reduce the cross-sectional area of the concrete required for the installation of the fixing device it is possible to reduce the weight and amount of concrete.

Furthermore, in contrast to the non-moving pretension manufacturing apparatus installed in the existing factory

First, the pretensioning method of introducing the tension force to the PS strand in advance requires a large concrete block on the ground to fix the PS strand. Therefore, it is possible to manufacture only in a non-movable fixed factory.

In addition, the pre-tension manufacturing platform installed in the field does not move the production platform, but after the pre-tension production platform is installed in advance to produce the PSC structure, the PSC structure is moved.

Therefore, the structure placed on the upper surface of the pretensioning platform is incurred because the lifting equipment (crane) and the transportation equipment (trailer) must be additionally transferred to another place.

However, in the present invention, since the movable pretensioning device is moved without having to move the manufactured PSC structure, the use of heavy equipment is limited and fast.

In addition, the present invention does not require the cost of the concrete and waste disposal cost to form the anchorage block for the construction of pre-tension stand and post (post) resistance.

This is an environmentally friendly construction method without waste disposal.

In addition, by forming the reaction frame in the CFT structure can be expected to improve the performance of the compression resistance,

In addition, the CFT composite structure of steel and concrete is easy to reduce the weight and easy assembly and disassembly on site.

1A, 1B and 1C show a lifting diagram of a conventional pretensioning device and a PSC structure,
2a, 2b and 2c are assembled perspective views of the mobile pretensioning apparatus of the present invention,
3a and 3b are assembled perspective views of the tension belt of the present invention,
4a and 4b are assembled perspective views of the fixing of the present invention,
5A, 5B, 5B and 5D are construction flowcharts of a PSC structure using the pretensioning apparatus of the present invention.

DETAILED DESCRIPTION Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings so that those skilled in the art may easily implement the present invention. The present invention may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein. In the drawings, parts irrelevant to the description are omitted in order to clearly describe the present invention, and like reference numerals designate like parts throughout the specification.

<Movable pretension device A of the present invention>

The movable pretensioning device (A) is largely composed of the base 100, the reaction frame 200, the tension block 300, the fixed block 400, the hydraulic jack 500 and the tension member 600 as shown in FIG.

The base 100 may be referred to as a bottom plate for placing concrete (C) in the formwork to be installed on the upper surface formwork 800 for manufacturing the PSC structure 700.

Such a formwork is a concept including a formwork for supporting a formwork on a base upper surface as a steel formwork for manufacturing a PSC structure such as a PSC girder.

When the base 100 is formed to have a predetermined area and length so that a plurality of PSC structures can be manufactured in parallel, the base 100 is formed to have a predetermined thickness, unlike a conventional structure, and a member such as an anchor block is not installed. to be.

The base 100 is to dig the ground well in the field, and to form a predetermined height by laying a material such as sand / gravel or stone powder, it is used to install a steel plate or plywood (not shown) thereon.

Accordingly, the formwork 800 for manufacturing the PSC structure is installed on the upper surface of the base 100, and the required reinforcing bar assembly (not shown) is disposed together in the formwork.

At this time, the tension member 600 is disposed in the longitudinal direction in advance in the formwork.

In the pretension method, the tension member 600 is pre-tensioned, and then concrete (C) is placed in the formwork so that the means for pre-tensioning the tension member should be installed. Such means is the reaction frame 200 of the present invention, the tension block ( 300), the fixed block 400 and the hydraulic jack (500).

First, the reaction frame 200 is a structure for supporting the tension applied when the pre-stress is introduced in a pre-tension method, such a reaction force frame should support a tension force of several hundred tons or more, so it must be manufactured in a structurally stable form.

In the related art, the reaction frame 200 has a function as the reaction frame 200, as shown in FIGS. 1A and 1B, and used a fabrication table 20 made of reinforced concrete structures installed on the ground. It was common to install).

The fabrication table 20 is dismantled when the PSC structure fabrication is completed. In this process, a large amount of waste is generated and a lot of inconveniences in construction due to the removal of the anchorage block 21 are generated.

Therefore, the present invention is to use the reaction frame 200 to replace it without using the fabrication table 20 made of reinforced concrete structure.

The reaction frame 200 of the present invention is composed of a concrete-filled steel pipe 210 and the transverse connecting member 220.

The concrete filled steel pipe (CFT, 210) is a composite steel pipe filled with concrete 212 inside a circular steel pipe 211 having a constant diameter as shown in Figure 2b.

The concrete filled steel pipe 210 is a compression member because the compressive force is applied when the pre-stress is introduced is to use a concrete pipe favorable to the compressive force in order to effectively support the compressive force but to accommodate the concrete.

As a result, the concrete is constrained to the steel pipe to support the compressive force more effectively by the restraint stress.

The concrete filled steel pipe 210 is spaced apart from each other as shown in Figures 2a and 2b to be set to the side of the base 100 described above. For this purpose, the base plate 120 extending or spaced from the base may be used.

Accordingly, the concrete filled steel pipe 210 is installed in both sides of the base 100 in a stable manner

For example, to anchor the concrete-filled steel pipe 210 using a clamp-shaped steel tube band 230 as shown in Figure 2c and the end of the steel tube band 230 embedded in the base plate 120 protruding anchor bolt It is fixed to the removable fasteners such as fastening nuts to (110).

Also, as shown in FIG. 2C, the steel frame 240 may be used in addition to or in place of the clamped steel tube band 230. The steel frame 240 is formed so as to surround the steel pipe as shown in Figure 2, the lower end of the steel frame is also embedded in the base plate 120 is a removable fastener such as fastening nut to the anchor bolt 110 protruding You can also fix it.

To this end, the lower end of the steel frame is to be formed on the bottom surface of the lower end of the steel frame stiffener (a kind of lower plate) installed between both flanges.

Accordingly, the concrete filled steel pipe 210 is installed to be detachable to the base plate 120, but it can be seen that the position of the filling steel pipe, such as buckling caused by the tension force when the tension is introduced, so as not to become unstable.

In addition, it is the lateral connecting member 220 to connect the concrete filled steel pipe 210 to each other to further supplement this.

The horizontal connecting member 220 may use a steel pipe or steel frame.

In Figures 2a and 2b it can be seen that the H-type steel frame is used and may be installed to be detachable to the outer peripheral surface of the concrete filled steel pipe (210).

To this end, both ends of the lateral connecting member 220 to the finish plate 221 is formed and the fastening bolt 222 penetrating through the finishing plate to the finish of the connecting steel 223 separately installed in the concrete filled steel pipe 210 By being fastened to the fastening nut 224 installed in the plate it will be possible to connect the transverse connecting member 220 to the concrete filling steel pipe 210 to be detachable.

Therefore, the lateral connecting member 220 can be seen that the installation is possible to detach the concrete filled steel pipe (210).

At this time, the lateral connecting member 220 is to pass through the bottom of the base 100, whereby the base 100, the concrete filling steel pipe 210 and the lateral connecting member 220 is constrained to be assembled and disassembled with each other It can be seen that.

Accordingly, the base 100 is blocked out so that the horizontal connecting member 220 can be inserted therein.

The block-out space is formed to be formed in the form of various lateral holes 130 so as to extend in the transverse direction in accordance with the number of installation of the lateral connecting member 220 is formed to be spaced apart in the longitudinal direction.

Accordingly, it can be seen that the reaction frame 200 is stably set on both sides of the base 100 by the concrete filling steel pipe 210 and the transverse connecting member 220.

Next, the tension block 300 and the fixed block 400 are installed on both sides in the state in which the reaction frame 200 is installed.

The tension block 300 is a block in which one end of the tension member 600 fixed to the fixed block 400 is fixed after the tension, and the fixed block 400 is a block in which one end of the tension member is fixed and fixed.

Both blocks are made in the same form to increase the convenience of production.

First, the tension block 300 will be described. The tension block is formed such that the tension member 600 is engaged with the upper tension block 310 and the lower tension block 320 in contact with each other.

To this end, the upper tension block 310 and the lower tension block 320 is in contact with the tension member receiving grooves (S1, S2) to be formed so that the tension material is inserted into the tension member receiving grooves (S1, S2) is the upper Schematic of the tension block 310 and the lower tension block 320 is formed in the shape of a block-out groove on the bottom and top of the central portion.

Accordingly, the width of the upper tension block 310 and the lower tension block 320 extends in the lateral direction in addition to the tension member insertion portion W1 in which the tension members are installed. The extension portion W2 is tensioned by the tension force. The block 300 may be referred to as a reinforcement portion to prevent deformation.

As shown in FIG. 3B, the upper tension block 310 and the lower tension block 320 may be compressed to be integrated with each other.

To this end, a plurality of fastening holes 311 and 321 are formed in the upper tension block 310 and the lower tension block 320 to communicate with each other, and the fastening holes 330 and the fastening nut 340 are formed in the fastening holes. To be compressed.

In this state, the tension member accommodating grooves S1 and S2 formed in the upper tension block 310 and the lower tension block 320, respectively, form an insertion space S1 + S2 = S through which the tension member 600 can be inserted. It can be seen that.

Accordingly, the tension member 600 is inserted into the insertion space by the tension member receiving groove S, and the tension fixing hole 350 is mounted at the end of the tension member at the outer end thereof, and the tension fixing hole 350 is the tension block 300. It can be seen that the setting is in contact with the outer end (C1) of.

At this time, the tension fixing device 350 is not directly in contact with the outer surface of the tension block 300, and the fixing plate 370 is disposed on the outer surface of the fixing plate so that the stress of the north and south due to the tension of the tension member is dispersed.

Accordingly, the fixing plate 370 has a plurality of tension material holes 371 formed therein so that the tension material can penetrate and set on the outer surface of the tension block.

The tension member 600 has one end fixedly fixed to the fixing block 400 which will be described later, and the other end extends into the insertion space (S1 + S2 = S) of the tension block to penetrate the fixing plate 370 as well, so that the final tension fixing device It can be seen that after the tension by the 350 to be fixed to the fixing plate 370.

The fixing block 400 is installed to be supported on one end surface of the concrete filled steel pipe 210 at the position opposite to the tension block 300 as shown in Figure 4a.

That is, the upper fixed block 410 and the lower fixed block 420 are installed on one end surface of the concrete filled steel pipe 210 so as to be supported by the fixed block 400 integrated with each other.

Accordingly, the c-shaped support block 460 is installed on one end surface of the concrete filled steel pipe 210 such that the fixed block 400 is stably supported on the c-shaped support block 460. The fixing block 400 is fitted to be supported.

The fixing block 400 is also formed such that the tension member 600 is engaged with the upper fixing block 410 and the lower fixing block 420 contact up and down as shown in FIG. 4B.

To this end, as shown in Figure 4a, the upper fixed block 410 and the lower fixed block 420 is also in contact with the tension member 600 is to be formed so that the tension member accommodating grooves (S1, S2) to be formed. The grooves S1 and S2 may be formed by forming grooves cut out on the bottom and top surfaces of the upper and lower fixed blocks 410 and 420.

Accordingly, in addition to the tension member insertion portion W1 in which the transverse width tension members of the upper fixing block 410 and the lower fixing block 420 are installed, the extension portion W2 is also extended by the tension force. The block 300 may be referred to as a reinforcement portion to prevent deformation.

Again, as shown in Figure 4a, the upper fixed block 410 and the lower fixed block 420 is to be compressed to be integrated with each other. To this end, a plurality of fastening holes 411 and 421 communicating with each other are formed in the upper fixing block 410 and the lower fixing block 420, and the fastening bolts 430 and the fastening nuts 440 are formed in the fastening holes. To be compressed.

In this state, the tension member accommodating grooves S1 and S2 respectively formed in the upper fixing block 410 and the lower fixing block 420 form an insertion space S1 + S2 = S through which the tension member 600 can be inserted. It is the same.

Accordingly, the tension member 600 is inserted into the insertion space by the tension member accommodation groove S, and the normal fixing fixture 450 (a type of wedge member) is mounted at the tension member end at the outer end thereof so that the fixing fixture 450 is fixed. It can be seen that the fixed end in contact with the outer end (C2) of (400).

Also, the fixing fixture 450 does not directly contact the outer surface of the fixing block 400, so that the fixing plate 470 is disposed on the outer surface of the fixing plate so that local stress due to tension of the tension member is dispersed.

As a result, the present invention can be seen that the tension member 600 is arranged in the tension member insertion portion (W1) of the tension block 300 and the fixed block 400, the tension member insertion portion (W1) is the width of the insertion space in the transverse direction It can be seen that the interval can be adjusted freely according to.

Therefore, it can be seen that the workability in the installation of the tension member 600 is very easy.

In this way, the tension member 600 is fixed to the fixing block 400 in the state where the other end is fixed to the fixing plate 370 of the tension block 300 to introduce a tension force to the tension member. As described above, the hydraulic jack 500 is mounted between the tension block 300 and the other end of the concrete filling steel pipe 210.

The hydraulic jack 500 is one side is set to the end surface (C3) of the concrete-filled steel pipe 210, one end is fixed to the fixed block as the cylinder is protruded in the longitudinal direction so that the extended cylinder is in contact with the tension block. You will be able to relax the tension.

At this time, the c-shaped support block 360 is installed between the tension block 300 and the cylinder of the hydraulic jack so that the tension block is inserted into the c-shaped support block 360 so that a stable tension force can be introduced. do.

When the hydraulic jack 500 is maintained in a state in which the cylinder is operated so that a required tension force can be generated, the tension member 600 can maintain a state in which the tension force is introduced.

It can be seen that the tension member 600 penetrates the formwork 800 installed on the upper surface of the base 100 as shown in Figure 3a.

In this state, when the concrete is poured and cured in the formwork, the PSC structure 700 can be manufactured.

Accordingly, when the PSC structure 700 is manufactured, the prestress can be introduced into the concrete by cutting the tension member by the elastic restoring force of the tension member.

In this case, the cutting may mean cutting of the tension member, but a method of separating the tension members connected to the coupler from each other as in the conventional method may be used.

In the present invention, the reason why the mobile pretension device A is referred to as mobile is as shown in FIGS. 5B and 5C.

When the PSC structure 700 is manufactured, the PSC structure 700 is left in the completed state on the base 100 instead of being lifted and stacked by a lifting device.

Disassemble the assembled reaction frame 200, tension block 300, fixed block 400, hydraulic jack 500,

These are again assembled to the base 100 of the side of the completed PSC structure 700 means that the PSC structure 700 is continuously installed in parallel on the base.

Accordingly, the present invention does not reside in a large lifting device such as a crane for lifting and loading the PSC structure 700, the assembled reaction force frame 200, tension block 300, fixed block 400, hydraulic jack 500 By using a backhoe that can normally move in the field, it is possible to reduce the manufacturing cost of the PSC structure.

Therefore, in the conventional pretension method, the cost incurred by having to reside a large lifting device while manufacturing the PSC structure on site can be reduced by using the mobile pretension device, and the mobile pretension device is assembled and It is to be installed while moving by disassembly.

<Production method of PSC structure using mobile pretensioning device (A) of the present invention>

The manufacturing method of the PSC structure of the present invention is a method of continuously manufacturing the PSC structure 700 on the base by using the mobile pretensioning device (A) described above, and finally, the mobile pretensioning device (A) is moved by assembling and dismantling. It can be called a method of manufacturing a PSC structure.

When the PSC structure 700 is manufactured by the mobile pretension device A of the present invention as shown in FIG. 5A,

First, as shown in FIG. 5B, the tension block 300, the fixed block 400, the hydraulic jack 500, and the tension member 600 for manufacturing the PSC structure are dismantled.

One concrete filled steel pipe 210a installed at the outermost side of the two concrete filled steel pipes 210; 210a and 210b installed in the base 100 is dismantled.

This is done by dismantling the clamp-shaped steel tube band 230 and / or steel frame 240 from the base described above, the horizontal connection member 220 connecting the concrete-filled steel pipe (210a, 210b) to each other at this time Dismantled together.

The remaining concrete filled steel pipe (210b) is left as it is, using a site-resident lifting device, such as a backhoe, simply dismantled apart from the base 100 to the side of the concrete filled steel pipe (210a) steel tube band 230 and / or Using the steel frame 240 is fixed.

In the base 100 between the remaining concrete filling steel pipe 210b and the concrete filling steel pipe 210a installed again, the formwork 800 for manufacturing the PSC structure is placed again.

Next, as shown in Figure 5c, set the dismantled tension block 300, fixed block 400, the tension member 600, and also set the hydraulic jack 500, and again close the formwork 800 to the tension member 600. Tensioned to penetrate in the direction.

Thus, the concrete (C) is poured into the formwork 800 to cure the tension material after curing to produce the PSC structure 700 again.

By repeating this operation, the present invention can be seen that the PSC structure can be continuously manufactured in parallel on the base as shown in FIG. 5D (only two are shown in FIG. 5D, but two or more can be produced continuously), which is a reaction frame 200 ), The tension block 300, the fixed block 400, the hydraulic jack 500 can be seen that the PSC structure to be manufactured by continuing to reuse while disassembling, for this purpose, the base 100 is the PSC structure 700 It can be seen that the installation area for the continuous manufacturing.

100: base 110: anchor bolt
120: base plate 130: transverse hole
200: reaction frame
210,210a, 210b: concrete filled steel pipe 211: round steel pipe
212 concrete (for concrete-filled steel pipes) 220: transverse connectors
230: steel tube band 240: steel frame
300: tension block
310: upper tension block 320: lower tension block
330: tightening bolt 340: tightening nut
350: tension stop 360: c shaped support block
370: fixing plate 371: tension hole
400: fixed block
410: upper fixed block 420: lower fixed block
430: tightening bolt 440: tightening nut
450: fixing fixture 460: c shaped support block
470: fixing plate
500: hydraulic jack 600: tension material
700: PSC structure 800: formwork
A: Mobile pretension device C: Concrete (for PSC structure)
C1, C2: outermost end
S (S1 + S2): Insertion space (for tension member) S1, S2: Tension receiving groove

Claims (13)

A base 100 extending in the longitudinal direction and formed to produce a plurality of PSC structures in parallel, and having a formwork disposed on the upper surface thereof so that the tension member penetrates and extends in the longitudinal direction; Both filled concrete steel pipe 210 is fixed to be removable so as to extend in the longitudinal direction on both sides of the base; And a transverse connecting member (220) connected to the other filling concrete steel pipe through the lower portion of the base from one side of the filling concrete steel pipe; A fixed block 400 installed at one end of the reaction frame such that one end of the tension member 600 is fixed and fixed; And a tension block 300 installed at one end spaced apart from the other end of the reaction frame in which the other end of the tension member is fixedly fixed to the fixed block.
The base 100 is formed to extend in the transverse direction so that a plurality of PSC structures can be spaced apart in parallel, and a plurality of transverse holes 120 are formed in the lower direction so that the transverse connecting member can pass through Mobile pretension production apparatus characterized in that. The method of claim 1,
The transverse connecting member 220 is a mobile pre-tensioning production apparatus, characterized in that the reaction frame is to be detached from the base to be connected to the removable concrete steel pipe 210 so as to be detachable. 3. The method according to claim 1 or 2,
The fixed block 400 is
An upper fixing block 410 in which a tension member accommodating groove S1 is formed in the shape of a groove that is blocked out at the bottom of the center portion and formed with a plurality of fastening holes so that the tension material can be inserted;
A lower fixing block 420 in which a tension member accommodating groove S2 corresponding to the tension material accommodating groove S1 is formed in the shape of a groove which is blocked out on the upper surface of the central portion and in which a plurality of fastening holes are formed;
A fastening bolt 430 and a fastening nut 440 fastened to a fastening hole such that the upper fixed block and the lower fixed block are compressed;
A fixing fixture 450 installed in contact with the outer ends of the compressed upper fixing block and the lower fixing block; And
And a fixing plate 470 in which a plurality of tension material holes are formed to be in contact with the outer ends of the compressed upper tension block and the lower tension block.
Mobile pretension manufacturing apparatus, characterized in that the tension material receiving grooves (S1, S2) are combined to penetrate the insertion space (S1 + S2 = S) formed by combining a plurality of ends to be fixed to the fixing fixture. . The method of claim 3, wherein the fixed block 400 is
Mobile pretension manufacturing apparatus, characterized in that installed on one end of the concrete filling steel pipe constituting the reaction frame is installed at one end of the reaction frame by the c-shaped support block 460 is fitted with a fixed block fitted. 3. The method according to claim 1 or 2,
The tension block 300 is
An upper tension block 310 in which a tension member accommodating groove S1 is formed in the shape of a block-out groove in a bottom surface of the center portion, and a plurality of fastening holes are formed to allow the tension member to be inserted;
A lower tension block 320 in which a tension member accommodation groove S2 corresponding to the tension member accommodation groove S1 is formed in the shape of a groove that is blocked out on an upper surface of the center portion and in which a plurality of fastening holes are formed;
A fastening bolt 330 and a fastening nut 340 fastened to a fastening hole such that the upper tension block and the lower tension block are compressed; And
A fixing plate 370 in which a plurality of tension material holes are formed in contact with the outer ends of the compressed upper tension block and the lower tension block to allow the tension material to pass therethrough;
It includes; tension fixing port 350 installed on the outer surface of the fixing plate,
A mobile pretension manufacturing apparatus, characterized in that the tension member receiving grooves (S1, S2) are combined to penetrate the insertion space (S1 + S2 = S) formed by a plurality of spaced apart space to one end to the tension fixing fixture. . According to claim 5, Hydraulic jack 500 is further provided between the tension block and the other end of the concrete filled steel pipe constituting the reaction frame,
The pre-tensioning device, characterized in that the tension block is formed between the hydraulic jack and the tension block is spaced apart from the other end of the reaction frame by the c-shaped support block 360 is inserted into the tension block is installed. delete A method of manufacturing a PSC structure for continuously installing a PSC structure in parallel on an upper surface of a base by using the mobile pretensioning device of claim 1,
The tension block 300, the fixed block 400, the hydraulic jack 500 and the tension member 600 installed for manufacturing the PSC structure in a state in which the PSC structure is manufactured on the base 100 using the mobile pretension manufacturing apparatus (A). ),
The one side of the charged concrete steel pipes 210a of both the charged concrete steel pipes of the reaction frame installed on both sides of the base is disassembled together with the transverse connecting member so as to be detachable to the side of the new base which is laterally spaced apart from the other filled concrete steel pipes 210b. In addition to the fixed installation so as to connect to each other by using the disassembled transverse connector,
The new formwork 800 and the tension member 600 is newly installed in the base between the newly fixed filling concrete steel pipe (210a) and the other filling concrete steel pipe (210b),
Re-installing the dismantled fixed block, the tension block and the hydraulic jack to tension-fix the tension member to the tension block, and then placing and curing concrete in the form the pre-stress structure using a mobile pre-tension manufacturing device comprising the How to make. The method of claim 8, wherein assembling and disassembling the reaction frame including the concrete-filled steel pipe and the transverse connecting member is repeated so that a plurality of PSC structures can be continuously manufactured in parallel to the upper surface of the base in parallel. Prestress structure manufacturing method using pretensioning apparatus. The method of claim 8, wherein the fixed block 400 is
An upper fixing block 410 in which a tension member accommodating groove S1 is formed in the shape of a groove that is blocked out at the bottom of the center portion and formed with a plurality of fastening holes so that the tension material can be inserted;
A lower fixing block 420 in which a tension member accommodating groove S2 corresponding to the tension material accommodating groove S1 is formed in the shape of a groove which is blocked out on the upper surface of the central portion and in which a plurality of fastening holes are formed;
A fastening bolt 430 and a fastening nut 440 fastened to a fastening hole such that the upper fixed block and the lower fixed block are compressed;
A fixing fixture 450 installed in contact with the outer ends of the compressed upper fixing block and the lower fixing block; And
And a fixing plate 470 in which a plurality of tension material holes are formed to be in contact with the outer ends of the compressed upper tension block and the lower tension block.
Mobile pretension manufacturing apparatus, characterized in that the tension material receiving grooves (S1, S2) are combined to penetrate the insertion space (S1 + S2 = S) formed by combining a plurality of ends to be fixed to the fixing fixture. Prestressed structure manufacturing method using. The method of claim 9, wherein the fixed block 400 is
The prestressed structure is manufactured by using a mobile pretensioning device, which is installed at one end of the concrete filled steel pipe constituting the reaction frame and installed at one end of the reaction frame by a c-shaped support block into which a fixed block is fitted. Way. The method of claim 8, wherein the tension block 300 is
An upper tension block 310 in which a tension member accommodating groove S1 is formed in the shape of a block-out groove in a bottom surface of the center portion, and a plurality of fastening holes are formed to allow the tension member to be inserted;
A lower tension block 320 in which a tension member accommodation groove S2 corresponding to the tension member accommodation groove S1 is formed in the shape of a groove that is blocked out on an upper surface of the center portion and in which a plurality of fastening holes are formed;
A fastening bolt and a fastening nut fastened to a fastening hole such that the upper tension block and the lower tension block are compressed; And
A fixing plate 370 in which a plurality of tension material holes are formed in contact with the outer ends of the compressed upper tension block and the lower tension block to allow the tension material to pass therethrough;
It includes; tension fixing port 350 installed on the outer surface of the fixing plate,
A mobile pretension manufacturing apparatus, characterized in that the tension member receiving grooves (S1, S2) are combined to penetrate the insertion space (S1 + S2 = S) formed by a plurality of spaced apart space to one end to the tension fixing fixture. Prestressed structure manufacturing method using. The hydraulic jack is further installed between the other end of the concrete filled steel pipe constituting the tension block and the reaction frame,
Formed between the hydraulic jack and the tension block is a mobile pre-tensioning device characterized in that the tension block is spaced apart by the other end of the reaction frame by the c-shaped support block 360 is installed is inserted into the tension block. Prestress structure manufacturing method using.

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