KR100910055B1 - Connecting apparatus and connecting method of precast concrete box units and precast concrete box unit comprising double connecting apparatus - Google Patents

Abstract

A double connecting apparatus and method of precast concrete box units and a precast concrete box unit comprising the double connecting apparatus are provided to provide shear and bending resistance to the joint part between the precast concrete box units, especially in soft ground with risk of differential settlement. A double connecting apparatus(200) of precast concrete box units comprises first and second buried fixed ends(210a,210b) which have tendon passing holes to be connected to tendon pass holes formed on precast concrete box units(110,120) and embedded in the front and rear sides of the joint; a hollow main anchorage device consisting of hollow fastening members which are assembled to the first and second buried fixed ends and press-fitted each other to join the adjacent precast concrete box units; and an auxiliary anchorage device including a tendon(300b) whose one end is settled on the first buried fixed end behind the previously assembled precast concrete box unit and passes through the hollow main anchorage device and the following precast concrete box unit and the other is settled on the first buried fixed end of the following precast concrete box unit.

Description

{Connecting Apparatus and Connecting Method of Precast Concrete Box Units and Precast Concrete Box Unit including Double Connecting Apparatus}

The present invention relates to a connection apparatus and a connection method using the same, which provide a connection structure for installing a predetermined length of precast (Pre-Casting) box units (culverters), which are prefabricated by a precasting method in a factory, by interconnecting them in a pipe direction. By providing sufficient shear resistance and torsional resistance at the connection between the precast concrete box units, the precast concrete box unit itself produced in the factory does not have a complex structure, thereby eliminating the complexity of the factory manufacturing work and further The present invention relates to a precast concrete box unit product equipped with such a double connection device by providing an economical connection structure and a connection method by increasing the usability at the cast concrete culvert construction site.

When constructing water, sewage, or pipeline facilities such as electric power, communication, or common areas, in the past, the construction of the structure has been carried out mainly through the construction of concrete in the field. Precast Concrete Box Culverts (hereinafter referred to as 'PC Culverts') pre-fabricated at the factory are increasingly being used to transport and assemble products in the field. The construction speed is fast and can be refilled immediately after construction, which can solve problems such as civil inconveniences related to construction, disruption of traffic flow, and unnecessary waste of construction period, so it is effective for complex urban construction and thorough quality control. Because the product is produced in the form of high-strength products in the factory, the quality is excellent and uniform It has several advantages, such as increased watertightness and durability.

On the other hand, such a prefabricated PC culvert manufactures a plurality of box units in the factory, and then transported to the site to construct a culvert structure while extending the connection of the hollow box units in the direction of the pipeline, where the rugged connection of the PC culvert connection is assembled It is very important to ensure bonding strength and tight water tightness.

In order to solve this problem, in the conventional prefabricated PC culvert, as shown in Figure 8, in order to interconnect the plurality of PC culverts (P500) installed adjacent to each other in the field, the corner haunch of these PC culverts (P500) The PC steel wire (P50) installed to penetrate the steel wire through hole (P512) formed in the tension is tensioned with a tension device and then settled in the steel wire anchorage (P510) to adopt a prestress force (Prestress Force) is adopted to interconnect with each other. .

On the other hand, when fixing a steel wire in a general bridge girder using such a fixing device, the wedge of the fixing device is pushed into the wedge hole of the wedge cone member by the reaction force when tensioning by installing a normal hydraulic tensioning device directly to the fixing device. Even if the hydraulic pressure of the hydraulic tensioner is removed, the slippage of the steel wire in the fixing device can be suppressed as much as possible. However, in the case of PC culverts, a series of PC culvert box assemblies must be continuously installed repeatedly. Therefore, when using the conventional fixing device as described above, the position of the steel wire anchorage is formed in the middle portion of the PC culvert rather than at both ends. In order to tension the steel wire, the hydraulic tension device is applied to the end face of the PC culvert and the steel wire is tensioned by the reaction force of the PC culvert wall. Therefore, unlike the tensioning method of the bridge girder, There is a problem that the steel wire slip phenomenon occurs in the steel wire fixing device installed in the steel wire anchoring hole formed in the middle of the PC culvert may cause a loss of prestress force of the steel wire, and also as shown in Figure 10 of the PC culvert (P500) The steel wire passing hole (P512) is exposed to the inner middle portion in the longitudinal direction to fix the steel wire (P50). In order to form the wire anchorage (P510) formed so that the structurally vulnerable to the formation of the chamfer inside the PC culvert or to form a separate ridge on the outside of the PC culvert, the hunt portion or ridge is formed Due to the structurally very vulnerable part, there is a problem that the haunting part or ridge is easily damaged by the upward force or the downward force by the wires at the joints between the PC culverts generated when the PC culvert is inevitably settled. Is again filled by mortar, etc., but the rainwater penetrates due to the incomplete bonding of the old and new concrete, thereby causing the corrosion of the steel wire.

Thus, as a technical alternative for solving the above-mentioned problems with the one-way steel wire fixing device, in Korean Patent Laid-Open No. 2003-0040874 (published May 23, 2003), as shown in FIGS. 11A to 11F. The bidirectional steel wire fixing device has been proposed, and the bidirectional steel wire fixing device is detachably coupled to both ends of the hollow coupling member P101 and the coupling member P101 and has a cone-shaped wedge hole P104 and P104 at the center thereof. Wedge holes P104 and P104 'of the pair of wedge cone members P102 and P102' and the ends of the steel wires P10 and P10 'are formed. Wedges P103 and P103 'for fixing the steel wires P10 and P10' by being inserted into each other are connected to each other by the coupling member P101 while the steel wires P10 and P10 'are fixed in both directions. Has a structure characterized in that, also such a bidirectional steel wire When the fixing device is installed in the mortar groove P211 of the PC culvert or the shear groove P212 as shown in FIG. 11F, when the mortar is filled in the mortar groove P211 and the shear groove P212, the steel wire is in the mortar. Fixing device (P100) is also buried to provide a structure that can prevent corrosion by blocking contact with the outside air.

However, even in the bidirectional steel wire fixing device according to the prior art as shown in Figs. 11A to 11F, both ends of the steel wire when the tension member tension by the tension device is completed and the steel wire constituting the tension material is fixed by the fixing device Sliding of the steel wire may occur in both fixing devices installed at both ends. For example, the fixing of the wedge-con member constituting the fixing device in either direction may be loosened due to the displacement of the ground or the structure. There is a limitation in providing, and as a result, the prestressing force of the PC steel wire is relaxed, which may cause a problem of weakening the connection force between the PC culvert units.

In addition, when the PC culvert unit is inclined due to the ground change, a gap between the PC culvert units may occur while the PC steel wire is bent, excessive elongation force and elongation occurs, and in some cases, the position of the PC culvert unit is restored. As a result, the settlement between the PC wire and the fixing device may be loosened.

In addition, according to the conventional technology, when the wedge-con member constituting the fixing device is fixed and the portion providing the reaction force is composed of the concrete surface, when the concrete surface is crushed even a little by the fixing device, the prestressing force of the PC steel wire is relaxed. Indicates a problem.

In addition, in the case in which the above-described bidirectional steel wire fixing device is installed in the mortar groove P211 or the shear groove P212 of the PC culvert shown in FIG. 11A (for example, the case in which the shear groove is installed in FIG. 11F), When the mortar is filled in the mortar groove (P211) and the shear groove (P212), the steel wire fixing device (P100) is also buried in the mortar to prevent contact with the outside air to prevent corrosion, which is shown in Figure 11f This is only true if the distance between the entire length of the steel wire fixing device P100 and the bottom surfaces of both recesses P110 and P110 'of the mortar groove P211 or the shear groove P212 is exactly the same. As shown in the actual construction example, a gap of a predetermined size occurs in most cases between the right side surface of the right wedge-cone member P102 'and the bottom surface of the right recessed portion P110'. Through the mortar The leakage phenomenon through the wire installation hole of mortar occurs slightly over time rather than immediately reacting at the time of mortar injection, and continuously leaks after the mortar injection is completed before the mortar hardening is completed. As this progresses, the mortar groove P211 located at the upper side of the PC culvert connection part generates a significant amount of voids due to the leakage of mortar, thereby showing a serious problem of sagging and leaking phenomenon.

In this regard, the cause of such a gap between the right side surface of the right wedge cone member P102 'and the bottom surface of the right concave portion P110' may be understood through the steel wire fixing process in the bidirectional fixing apparatus. There will be, but primarily the fixing of the steel wire (P11) used to connect the first, second and third PC culverts (P201, P202, P203) on the left side of Figure 11e is the left wedge of the bidirectional steel wire fixing device (P100) After the cone member P102, the right wedge cone member P102 'is coupled to the coupling member P101 of the bidirectional steel wire fixing device P100, and the right wedge P103' is connected to the steel wire P11 '. After the right wedge-con member P104 'is coupled with the coupling member P101 in a state of being bitten into the wedge hole P104' of the right wedge-con member P102 ', the right-side wedge-con member P104' is coupled to the coupling member P101. 4, the fifth and sixth PC culverters (P204, P205, P206) is connected, the installation, tension, Since the fixing provides a steel wire fixing structure in which the right wedge-cone member P102 'is provided, the right side and the fourth PC of the right wedge-cone member P102' that do not provide a physical meaning of fixing as shown in FIG. 11G. Between the bottom surface of the left recess P110 'of the culvert P204, it is necessary to have a certain tolerance in consideration of the manufacturing tolerances of the PC culvert or the unevenness of the installation ground, so that it is not completely close beyond the tolerance range. If not, such a gap will eventually occur.

The present invention is to improve the problems of the prior art as described above, Looking at the problem of the present invention in more detail, the first problem can be installed a bidirectional fixing device for connecting them to the connection of the precast concrete box units By preventing the gap between the bi-directional fixing device and the steel wire installation hole structurally, it is possible to prevent mortar leakage from the mortar groove, and to provide strong shear resistance as well as flexural tensile resistance at the connecting parts of the culvert units connected in series. It is to provide a new structure of a double fixing device to facilitate the induction fastening fastening.

Another object of the present invention is to provide a structure and a construction method for effectively injecting non-shrink mortar to the connecting portion of interconnecting culvert units.

Furthermore, the present invention is to provide a precast concrete box unit having the above-mentioned double fixing device as a unit product used to construct a culvert structure by interconnecting both culvert units.

The present invention as a means for solving the problem to provide a double fixing device that provides sufficient shear resistance and bending tensile resistance in the connection of precast concrete box unit in the soft ground, such as the occurrence of uneven settlement is likely to occur ,

It is for forming concrete culvert used for installation of facilities such as water supply and sewage, electric power, communication, or common areas. A precast concrete box unit connecting device for interconnecting precast concrete box units in which front and rear connection surfaces are continuously connected and connected in a pipe direction,

First and second embedded fixed ends provided with tension member through-holes so as to communicate with tension member installation holes respectively formed in the precast concrete box units on both sides to be connected to each other, and embedded in the rear and front sides of the connection surface, respectively;

Hollow type assembled to the first embedded fixed end installed in the rear of the pre-assembled precast concrete box unit and the second embedded fixed end installed in the front of the precast concrete box unit to be assembled through tension and fixation of the tension member. Hollow type anchoring device composed of fastening members, the hollow fastening member is configured to be fastened in an interference fit method as both precast concrete box units are mutually approached;

One end is fixed to the first embedded fixed end installed at the rear of the pre-assembled precast concrete box unit, and is pre-assembled while being installed to pass through the precast concrete box unit subsequently assembled with the hollow main assembly device. Including the auxiliary fixing device consisting of the tension member 300b is fixed to the other end fixed to the first embedded end of the cast concrete box unit,

It provides a pre-cast concrete box unit double connection device characterized in that providing a double connection between the precast concrete box unit by the fixing of the hollow cast anchoring device and the fixing of the tension member disposed therethrough.

Here, the hollow fastening member constituting the hollow main stationary device,

A hollow coupling member fixed to the first embedded fixed end of the pre-assembled precast concrete box unit, a cylindrical anchoring member extending concentrically rearwardly to the hollow coupling member,

A cylindrical outer anchor member fastened to the second buried fixed end of a precast concrete box unit which is subsequently assembled;

Located in the interior of the cylindrical anchoring anchor member, a tension material through hole is formed in the center, and the inclined wedge-shaped section in the direction of the precast concrete box unit pre-assembled so that the cylindrical anchoring member can be forcibly fitted; It is preferable to include a wedge-shaped inner anchor member formed by including a straight section in the direction of the second buried fixed end.

The present invention is another aspect, in terms of PC culvert construction method,

In the precast concrete box unit connection construction method for interconnecting the precast concrete box units in which the front and rear connection surfaces in the pipeline direction are continuously connected and installed through the precast concrete box unit connection device,

Tension member installation holes are formed in the precast concrete box units on both sides to be interconnected, and first and second embedding fixed ends provided with tension member through holes to communicate with the tension member installation holes are respectively provided on the rear side and the front side of the connection surface. Purchase and install the precast concrete box unit in the factory,

Before the precast concrete box units are connected back and forth in the direction of the pipeline at the construction site, an index barrier is disposed in the inner and outer double annular structures on the connection surface of the precast concrete box unit and penetrates the pre-assembled precast concrete box unit. After fixing the other end of the tension member to the first buried fixed end, the hollow coupling member is connected to the first buried fixed end, but is seated in the first wedge cone inclined hole formed on the inner side of the hollow coupling member. Connecting the first wedge-con member and a spring and washer supporting the same to the first buried fixed end, and installing the cylindrical main fixing member to the other end of the hollow coupling member in a concentric manner. And fastening the cylindrical outer anchor member to the second embedded fixed end of the precast concrete box unit which is subsequently assembled, and In the interior of the cylindrical outer anchor member, a tension material through hole is formed in the center portion, and the inner inclined wedge-shaped section toward the precast concrete box unit and the second embedding, which are pre-assembled so that the cylindrical anchoring member can be forcibly fitted. A wedge-shaped inner anchor member is formed to include a straight section in a fixed end direction, and extends through the second embedded fixed end of the precast concrete to be assembled and the wedge-shaped inner anchor member in the cylindrical outer anchor member. A connection preparation step of inserting and fixing the preceding one end of the tension member into the first wedge-con member on the side of the first embedding fixed end of the precast concrete unit pre-assembled by passing through the cylindrical anchoring member; and

The cylindrical anchoring member, while tensioning the tension member with a tensioning device at the other end of the precast concrete box unit that is subsequently assembled, with its reaction force pulling the precast concrete box unit that is subsequently assembled to the pre-installed precast concrete box unit side. Of the precast concrete box unit in which the forcing is fitted to the gap between the cylindrical outer anchor member and the wedge-shaped inner anchor member to form a main anchorage, and further the other end of the tension member tensioned by the tension device. Provided is a connection method of the precast concrete box unit comprising the step of completing the completion of the double fixing to form a secondary fixing by fixing to the first embedded fixed end on the other end.

Further, the present invention further provides a construction method for effectively injecting non-shrink mortar to the connecting portion of the culvert units connected to each other, the space between the tension member installation hole and the mortar groove provided with the above-mentioned precast concrete box unit connection device An index barrier for sealing an inner and outer ring is disposed between the precast concrete box units interconnected and connected to the mortar grooves and installed on one side of the precast concrete box unit through a mortar inlet extending to the side wall. Injecting a grouting material such as non-shrink mortar, when the grouting material is discharged through a first mortar outlet installed in the upper sidewall of the precast concrete box unit in communication with the mortar groove, the first mortar outlet 150a is closed. Then And a grouting material injection step of performing pressure injection until the grouting material is discharged through a mortar outlet formed by softly injecting a pressure with a grouting pump and having a bottom surface softly installed on an upper inner surface of an upper mortar groove of a precast concrete box unit. It provides a connection construction method of the precast concrete box unit, characterized in that.

The present invention is a precast concrete box unit product suitable for use in the construction method described above having a connection device having the above-described technical features, wherein the front and rear connection surfaces are continuously connected and installed in the pipe direction. In the precast concrete box unit,

First and second embedding fixed ends are provided on both connection surfaces of the precast concrete box unit so as to have tension passage holes formed to communicate with the tension member installation holes respectively formed in the precast concrete box units on both sides connected adjacently in front and rear directions. Purchased and installed,

In order to form a main fixation with the precast concrete box unit pre-assembled at the front side of the precast concrete box unit, a cylindrical outer anchor member fastened to the second buried fixed end, and inside the cylindrical outer anchor member Located in the center, the tension material passing hole is formed, a wedge-shaped inner anchor member is formed in the second buried fixed end including an inclined wedge-shaped section and a straight section, and

Between the cylindrical outer anchor member and the wedge-shaped inner anchor member provided in the precast concrete box unit to be assembled later, in order to form a main position with the precast concrete box unit to be assembled later on the rear side of the precast concrete box unit. It also provides a precast concrete box unit, characterized in that the cylindrical anchoring member formed to be forcibly fitted in the gap portion is provided in the first embedded fixed end.

The present invention constituted as described above provides a double fixing device that provides sufficient shear resistance and bending tensile resistance in precast concrete box unit connection in soft ground or the like with a high possibility of uneven settlement. Due to this, the effect of providing sufficient connection stiffness in the long term from the rigid bonding according to a separate main fixing device provided directly between the precast concrete box unit connections without relying only on the tension of the steel wire or the steel wire that the prestress gradually decreases with time. In addition, the part where the reaction force against the tension of the tension member used as the auxiliary fixing device is manufactured in the form of a buried fixed end embedded in the concrete structure, thereby preventing the formation of a crushing band due to the concentration of stress and the relaxation of the tension. doing And has a, itgie the internal leakage can be provided with little structure via a grouting material liner installation hole is further injected into the mortar of the connection grooves, it may also be large as to contribute to increase the rigidity of the connection portion.

Hereinafter, specific embodiments of the present invention will be described with reference to the accompanying drawings. 1 is a front perspective view of a precast concrete box unit constituting a preferred embodiment of the present invention, Figure 2a is a cross-sectional view AA of the precast concrete box unit connection shown in Figure 1, Figure 2b is a precast shown in Figure 1 FIG. 3 is a view showing an embodiment of a BB cross section of a concrete box unit connection part, FIG. 3 is an enlarged view of a main part of a BB cross section of a precast concrete box unit connection part shown in FIG. 2B, and FIG. 4 is according to the present invention. An exploded perspective view of the main components of the precast concrete box unit connection device, FIG. 5 is a cross-sectional view of an embodiment of a cylindrical anchoring member in the precast concrete box unit connection device according to the present invention, and FIGS. 6A to 6D. 5 is a longitudinal cross-sectional view illustrating various embodiments of the cylindrical anchoring member shown in FIG. 5.

The present invention, as shown in Figure 1, to form a concrete culvert used for installation of facilities, such as water and sewage, electric power, communication, or common areas, the shape of a cylindrical structure in which the front and rear sides are opened in the pipe direction. Precast concrete box unit connection device for interconnecting precast concrete box units 110 and 120 that are precast as a unit and transported to the construction site, and the front and rear connection surfaces are continuously connected and installed in the pipe direction. According to the preferred embodiments of the present invention shown in Figure 2b to 2c and 3 and 4 of the accompanying drawings,

It is for forming concrete culvert used for installation of facilities such as water and sewage, electric power, communication, or common areas.It is precast and manufactured in the unit of the tubular structure with the front and rear sides open to the pipeline and transported to the construction site. In the precast concrete box unit connection device 200 for interconnecting precast concrete box units in which the front and rear connection surfaces are continuously connected and connected in the pipe direction,

First to be provided on the rear side and the front side of the connection surface provided with a tension member through-holes so as to communicate with the tension member installation holes (111, 121) formed in each of the precast concrete box units (110, 120) of both sides interconnected And second embedding fixed ends 210a and 210b,

Through the tensioning and fixing of the tension member 300a in front of the first embedded fixed end 210a installed at the rear of the precast concrete box unit 110 that is preassembled and the precast concrete box unit 120 that is subsequently assembled. Consists of hollow fastening members respectively assembled to the second buried fixed end 210b installed, and the hollow fastening member forcibly fits as the precast concrete box units 110 and 120 on both sides are approached to each other. Hollow type anchoring device is configured to be fastened with,

One end is fixed to the first embedded fixed end 210a installed at the rear of the pre-assembled precast concrete box unit 110, and is subsequently assembled with the hollow main assembly device. Including a secondary fixing device consisting of a tension member (300b), the other end is fixed to the first buried fixed end (210a) of the precast concrete box unit 120 is subsequently assembled while being installed to pass through,

The fixing of the hollow casting device and the fixing of the tension member disposed therethrough provide a double connection between the precast concrete box units 110, 120,... It is possible to provide a dual fixing device that provides sufficient shear resistance and flexural tensile resistance in precast concrete box unit connection in soft ground or the like where settlement is likely to occur.

On the other hand, as a more specific embodiment of the preferred embodiment of the hollow anchoring device constituting the precast concrete box unit connection device 200 described above, Figures 2b, 3, 4, 5, and As shown in 6a to 6d, the hollow fastening member constituting the hollow casting device is fixed to the first buried fixed end 210a of the precast concrete box unit 110 assembled beforehand. A hollow coupling member 230; Cylindrical anchoring member 250 installed concentrically extending rearward to the hollow coupling member 230; And a cylindrical outer anchor member 270 fastened to the second buried fixed end 210b of the precast concrete box unit 120; Located in the interior of the cylindrical outer anchor member 270, a tension material through hole is formed in the center, the inner diameter in the direction of the pre-assembled precast concrete box unit for the cylindrical anchoring member 250 to be forcibly fitted The wedge-shaped section 281 and the wedge-shaped inner anchor member 280 is formed to include a straight section 282 in the direction of the second buried fixed end is preferably formed.

Here, the cylindrical anchoring member 250, the wedge-shaped inner anchor member 280 is forcibly fitted to the inner diameter of the cylindrical anchoring member 250, as shown in Figure 7a to 7c of the accompanying drawings. In this case, the section of the cylindrical anchoring member 250 is fitted to the wedge-shaped inner anchor member so that it is easy to be deformed outward along the wedge-shaped section 281 of the wedge-shaped inner anchor member 280 It is desirable to be formed of a soft material.

In addition, as shown in FIG. 3, the inner diameter d1 of the cylindrical anchoring member 250 is larger than the distal end diameter d3 of the wedge-shaped section 281 of the wedge-shaped inner anchor member 280. The thickness t1 of the cylindrical anchoring member 250 is larger than the inner diameter d5 of the cylindrical outer anchor member 270 and the outer diameter of the straight section 282 of the wedge-shaped inner anchor member 280. It may be desirable to form a thickness (t2) or more of the annular gap portion formed by the difference of (d4) in consideration of manufacturing tolerances, construction errors, and the like. When the screw fastening part 251 for fastening with the screw fastening part 234 formed in the rear end of the type | mold coupling member 230 is formed, and the rear end part 252 rounds inward and forms main fixation, Wedge-shaped section 281 portion of the wedge-shaped inner anchor member 280 It can be to facilitate the entering inside.

Then, the fitting section of the cylindrical main fixing member 250 is easily deformed outward along the wedge section 281 of the wedge-shaped inner anchor member 280, Figures 5 and 6a to As shown in FIG. 6D, a plurality of expansion slots 252s1 in the longitudinal direction are provided in a section fitted between the cylindrical outer anchoring member 250 and the wedge-shaped inner anchor member 280 in the cylindrical anchoring member 250. , 252s2, and the expansion slots 252s1 and 252s2 may allow the long expansion slot 252s1 and the short expansion slot 252s2 to be alternately formed in the circumferential direction. The ends of the slots 252s1 and 252s2 may be formed with crack expansion preventing holes to provide stable opening of the expansion slots.

On the other hand, as a more specific embodiment of the preferred embodiment of the auxiliary fixing device constituting the precast concrete box unit connection device 200 described above, as shown in Figure 2b and 4 and 7a, the auxiliary Hosting device,

One end of the tension member 300b installed through the precast concrete box unit 120 subsequently assembled to the first embedded fixed end 210a installed at the rear of the pre-assembled precast concrete box unit 110. The first wedgecon inclined hole 233 is formed on the inner surface of the hollow coupling member 230 fixedly connected to the first buried fixing end 210a to fix the first wedgecon inclined hole. A first wedge-con member 240 is installed at 233 to fix the preceding end of the tension member 300b, and

As shown in FIGS. 7B and 7C, the other end (rear) of the tension member 300b extends through the precast concrete box unit 120 that is subsequently assembled, and then the precast concrete box unit 120 that is subsequently assembled. The first buried fixed end 210a is inserted into the second wedgecon inclined hole 211a and the second wedgecon inclined hole 211a so as to be fixed and fixed to the first buried fixed end 210a. It is preferably made to include a second wedge cone member 220 is installed to fix the other end of the tension member 300b, the first wedge cone member 240 and the second wedge cone member 220 It may be composed of a plurality of wedges divided into two or three circumferences, and the wedges thus divided are elastically bound by wedge-con assembly rings 242 and 222 such as rubber rings installed in the circumferential direction on the outer surface.

Here, the first buried fixed end (1) so that the first wedge cone member 240 can be positioned in the first wedge cone inclined hole 233 before the one end of the tension member 300b is inserted. More preferably, the fixing spring 261 and the washer 262 are disposed in the space 232 between the rear end of the 210a and the first wedge-con member 240.

Next, as a description of the operation process of the device invention according to the present invention, the formation and specific construction process of the PC culvert structure unit using such a connection device as shown in Figures 1 and 2b, and Figs. It will be described as a method invention consisting of the steps proceeding as shown.

The connection construction method of the precast concrete box unit using the apparatus according to the present invention,

Tension member installation holes 111 and 121 are formed in the precast concrete box units 110 and 120 on both sides of the interconnection, respectively, and a first through hole tension member is provided so as to communicate with these tension member installation holes 111 and 121. And manufacturing the precast concrete box units 110 and 120 at the factory by installing the second embedding fixed ends 210a and 210b on the rear side and the front side of the connection surface, respectively (see FIGS. 1 and 4). ,

Before and after the precast concrete box units (110, 120, ...) are connected back and forth in the pipeline direction at the construction site, the inner and outer double annular structure on the connection surface of the precast concrete box units (110, 120, ...) Furnace index barriers 115i and 115j are disposed, and the other end of the tension member 300a penetrating the pre-assembled precast concrete box unit 110 is fixed to the first embedded fixed end 210a, and then the first The first wedge-con member is connected to the hollow coupling member 230 to the buried fixed end 210a and is seated in the first wedge-cone inclined hole 233 formed on the inner side of the hollow coupling member 230. 240 and a spring 261 supporting the washer and the washer 262 are assembled and connected to the first buried fixing end 210a, and the cylindrical fixing member is provided at the other end of the hollow coupling member 230. Pre-installed 250 concentrically extending rearward, and subsequent assembly The cylindrical outer anchor member 270 is fastened to the second embedded fixed end 210b of the concrete box unit 120, and a tension material through hole is formed in the center of the cylindrical outer anchor member 270, and the cylindrical main rod Including the inclined wedge-shaped section 281 in the direction of the precast concrete box unit preassembled so that the fixing member 250 can be forcibly fitted, and the straight section 282 in the direction of the second buried fixed end. Install the wedge-shaped inner anchor member 280, and the wedge-shaped inner anchor member in the second embedded fixed end 210b of the precast concrete unit 120 and the cylindrical outer anchor member 270 that are subsequently assembled ( The first end of the tension member 300b extending through the 280 passes through the cylindrical anchoring member 250, so that an image on the side of the first embedded fixed end 210a of the precast concrete 110 preassembled. The connection preparation stage for fixing the insert 1 to the wedge cone member 240 (see Fig. 2b) and, and

Precast concrete box unit which is pre-installed with a precast concrete box unit 120 which is subsequently assembled as a reaction force while tensioning the tension member 300b with the tension device at the other end of the precast concrete box unit 120 that is subsequently assembled. While being pulled toward the (110) side, the cylindrical anchoring member 250 is forcibly fitted to the gap between the cylindrical outer anchor member 270 and the wedge-shaped inner anchor member 280 to form a main anchoring Further, the dual fixing of the other end of the tension member 300b, which is tensioned by the tension device, is fixed to the first embedded fixing end 210a at the other end of the precast concrete box unit 120 that is subsequently assembled to form an auxiliary fixing. Connection construction of precast concrete box unit characterized in that it comprises a completion step (Fig. 7a and 7b) It provides the law.

In a further preferred embodiment of the construction method according to the present invention, as shown in the accompanying drawings Figure 7c and Figures 8a to 8h, the tension member installation hole is installed precast concrete box unit connection device 200 according to the present invention ( Index blocking material 115i for sealing the space between the spaces 111v and 111u and the space formed by the connection surface 121u and the mortar grooves 115v0: 115a and 115b in an annular manner from the inside and the outside. , 115j are disposed between the interconnected precast concrete box units 110 and 120, and communicated with the mortar grooves 115v0: 115a and 115b to be installed on one side of the precast concrete box units 110 and 120. Injecting a grouting material such as non-shrink mortar through the mortar injection port 140 extending to the side wall, the first mortar installed in the upper sidewall of the precast concrete box unit (110, 120) in communication with the mortar groove (115b) Outlet 150a Hagoseo Once it grouting material is discharged close to the first mortar discharge opening (150a) through Pressure injection is performed by a grouting pump, and pressure injection is performed until the grouting material is discharged through the mortar outlet 150 which is installed with the bottom of the upper mortar groove of the upper mortar groove of the precast concrete box units 110 and 120 softly installed. It is preferable to further include a grouting material injection step for improving the rigidity and watertightness of the joint portion, thereby achieving a structure in which the grouting material injected into the mortar groove of the connection has little internal leakage through the steel wire installation hole.

On the other hand, the present invention is a precast concrete box unit product having a connection device having the above-described technical features, which becomes a unit suitable for use in the construction method described above, as shown in the accompanying drawings Figure 9 In the precast concrete box unit (110, 120, 130) in which the front and rear connection surfaces are continuously connected and installed in the

The precast concrete box unit 120 of the precast concrete box unit 120 so as to have a tension material through hole formed to communicate with the tension member installation holes (131, 111) respectively formed on both sides of the precast concrete box unit (130, 110) connected adjacent to the front and rear The first and second embedding fixed ends 210a and 210b are embedded in both connection surfaces 121v and 121u and are provided.

In order to form the main anchoring (between the connection surface 111v and the connection surface 121u) with the precast concrete box unit 110 previously assembled at the front side of the precast concrete box unit 120, 2 is a cylindrical outer anchor member 270 fastened to the fixed end 210b, and located inside the cylindrical outer anchor member 270, a tension material through-hole is formed in the center, the inclined wedge-shaped section 281 And a wedge-shaped inner anchor member 280 including a straight section 282 is provided to the second buried fixed end 210b, and

In order to form a main fixation (between the connection surface 121v and the connection surface 131u) with the precast concrete box unit 130 to be assembled later on the rear side of the precast concrete box unit 120, the backward assembly The first cylindrical cylindrical anchoring member 250 is formed to be forcibly fitted into the gap between the cylindrical outer anchor member 270 and the wedge-shaped inner anchor member 280 provided in the precast concrete box unit 130. It provides a precast concrete box unit 120, characterized in that provided in the buried fixed end 210a, by using a plurality of such precast concrete box unit (110, 120, 130) described above The dual connection device and the connection construction method can be easily implemented.

Furthermore, in order to provide auxiliary fixing using the tension member 300b between the precast concrete box unit 120 and the pre-assembled precast concrete box unit 110, the precast concrete box unit 120 according to the present invention. In the first, the tension member 300b which is installed through the precast concrete box unit 120 to the first buried fixed end 210a installed on the rear connection surface 111v of the precast concrete box unit 110 previously assembled. One end of the) is to be settled, for this purpose, the hollow coupling member 230 is fixedly connected to the first buried fixed end 210a of the precast concrete box unit 110 pre-assembled, and the hollow couple A first wedge-cone inclined hole 233 is formed on an inner side surface of the ring member 230, and the first wedge-cone inclined hole 233 fixes a first end of the tension member 300b to the first wedge-cone inclined hole 233. The wedge cone member 240 is installed.

Further, in order to provide fixing of the other end of the tension member 300b installed through the precast concrete box unit 120, the first surface provided on the connection surface 121v behind the precast concrete box unit 120 is provided. The buried fixed end 210a is inserted into the second wedge-cone inclined hole 211a and the second wedge-cone inclined hole 211a, which is formed to fix the other end of the tension member 300b. To provide a precast concrete box unit 120 comprising a second wedge cone member 220, such a plurality of precast concrete box unit (110, 120, 130) as shown in Figure 9 By using the connection, the dual connection device and the connection construction method described above can be easily implemented.

The tension material that can be used in the present invention includes PS strands or steel wires, and so far, the present invention has been described in detail with reference to preferred embodiments. However, those skilled in the art to which the present invention pertains should know that the present invention is technical or essential. Since the embodiments may be embodied in other specific forms without changing the features, the embodiments described above are to be understood in all respects as illustrative and not restrictive.

In addition, the scope of the present invention is specified by the appended claims rather than the detailed description, and all changes or modifications derived from the meaning and scope of the claims and their equivalent concepts are included in the scope of the present invention. Should be interpreted as

1 is a front perspective view of a precast concrete box unit constituting a preferred embodiment of the present invention.

Figure 2a is a cross-sectional view A-A of the precast concrete box unit connection shown in FIG.

Figure 2b is a view showing an embodiment of the B-B cross section of the precast concrete box unit connection shown in Figure 1;

Figure 3 is an enlarged view of the main part of the B-B cross section of the precast concrete box unit connecting portion shown in Figure 2b.

Figure 4 is an exploded perspective view of the main components of the precast concrete box unit connection device according to the present invention.

Figure 5 is a cross-sectional view of the cylindrical stationary member in the precast concrete box unit connection device according to the present invention.

6A-6D are longitudinal cross-sectional views illustrating embodiments of the cylindrical anchoring member shown in FIG. 5;

7a to 7c show the construction steps of interconnecting the precast concrete box unit using the precast concrete box unit connection device according to the present invention.

8A-8H illustrate a grouting embodiment of a precast concrete box unit connection in accordance with the present invention.

9 is a sectional view showing a precast concrete box unit having a double connection device according to the present invention.

10 is a view showing a state where the PC steel wire is installed to penetrate the PC culvert according to the prior art.

11a to 11g are views of a connection structure of a precast concrete box unit according to another prior art.

Explanation of symbols on the main parts of the drawings

100, 120, 130: Precast Concrete Box Unit

200: precast concrete box unit connection device

210a, 210b: first and second embedded fixed ends

220: second wedge cone member 230: hollow coupling member

240: first wedge cone member 250: cylindrical stationary fixing member

270: cylindrical outer anchor member 280: wedge-shaped inner anchor member

300a, 300b, 300c: tension material (PS strand, etc.)

400: tension device

Claims (13)

It is for forming concrete culvert used for installation of facilities such as water and sewage, electric power, communication, or common areas.It is precast and manufactured in the unit of the tubular structure with the front and rear sides open to the pipeline and transported to the construction site. In the precast concrete box unit connection device 200 for interconnecting precast concrete box units in which the front and rear connection surfaces are continuously connected and connected in the pipe direction, First to be provided on the rear side and the front side of the connection surface provided with a tension member through-holes so as to communicate with the tension member installation holes (111, 121) formed in each of the precast concrete box units (110, 120) of both sides interconnected And second embedding fixed ends 210a and 210b, Through the tensioning and fixing of the tension member 300a in front of the first embedded fixed end 210a installed at the rear of the precast concrete box unit 110 that is preassembled and the precast concrete box unit 120 that is subsequently assembled. Consists of hollow fastening members respectively assembled to the second buried fixed end 210b installed, and the hollow fastening member forcibly fits as the precast concrete box units 110 and 120 on both sides are approached to each other. Hollow type anchoring device is configured to be fastened with, One end is fixed to the first embedded fixed end 210a installed at the rear of the pre-assembled precast concrete box unit 110, and is subsequently assembled with the hollow main assembly device. Including a secondary fixing device consisting of a tension member (300b), the other end is fixed to the first buried fixed end (210a) of the precast concrete box unit 120 is subsequently assembled while being installed to pass through, Precast concrete box, characterized in that to provide a double connection between the precast concrete box unit (110, 120, ....) by the fixing of the hollow cast anchoring device and the fixing of the tension member disposed through it. Unit duplex. According to claim 1, The hollow fastening member constituting the hollow main stationary device, A hollow coupling member 230 fixed to the first embedded fixed end 210a of the precast concrete box unit 110 assembled in advance; Cylindrical anchoring member 250 installed concentrically extending rearward to the hollow coupling member 230, And A cylindrical outer anchor member 270 fastened to the second buried fixed end 210b of a precast concrete box unit 120 which is subsequently assembled; Located in the interior of the cylindrical outer anchor member 270, a tension material through hole is formed in the center, the inner diameter in the direction of the pre-assembled precast concrete box unit for the cylindrical anchoring member 250 to be forcibly fitted Precast concrete box unit double connection, characterized in that it comprises a wedge-shaped section 281 and a wedge-shaped inner anchor member 280 is formed including a straight section 282 in the direction of the second buried fixed end Device. The method of claim 2, wherein the cylindrical anchoring member 250, When the wedge-shaped inner anchor member 280 is forcibly fitted to the inner diameter of the cylindrical anchoring member 250, a section in which the cylindrical anchoring member 250 is fitted is formed of the wedge-shaped inner anchor member 280. Precast concrete box unit double connection device, characterized in that formed with a softer material than the wedge-shaped inner anchor member to be easily deformed to the outside along the wedge-shaped section (281). The method of claim 3, The inner diameter d1 of the cylindrical anchoring member 250 is larger than the tip outer diameter d3 of the wedge-shaped section 281 of the wedge-shaped inner anchor member 280, and The thickness t1 of the cylindrical anchoring member 250 may include an inner diameter d5 of the cylindrical outer anchor member 270 and an outer diameter d4 of the straight section 282 of the wedge-shaped inner anchor member 280. Precast concrete box unit double connection device, characterized in that formed to be equal to or more than the thickness (t2) of the annular gap portion formed by the difference of. The method according to claim 3 or 4, The cylindrical portion in the cylindrical anchoring member 250 so that the fitting section of the cylindrical anchoring member 250 is easily deformed outward along the wedge-shaped section 281 of the wedge-shaped inner anchor member 280. Precast concrete box unit double connection device, characterized in that a plurality of expansion slots (252s1, 252s2) in the longitudinal direction is formed in the section fitted between the outer anchor member (270) and the wedge-shaped inner anchor member (280). 6. The pre-cast concrete box unit double connection according to claim 5, wherein the expansion slots 252s1 and 252s2 are formed of alternating long expansion slots 252s1 and short extension slots 252s2 in the circumferential direction. Device. 6. The precast concrete box unit double connection device according to claim 5, wherein crack expansion preventing holes are formed at ends of the expansion slots (252s1, 252s2) to provide stable opening of the expansion slots. The method of claim 2, The auxiliary fixing device, One end of the tension member 300b installed through the precast concrete box unit 120 subsequently assembled to the first buried fixed end 210a installed at the rear of the precast precast concrete box unit 110 is assembled. To be fixed, a first wedge-cone inclined hole 233 is formed on an inner side surface of the hollow coupling member 230 fixedly connected to the first buried fixing end 210a, and the first wedge-cone inclined hole 233 is formed. ) Is provided with a first wedge-con member 240 to fix the preceding end of the tension member 300b, and The second wedge-cone inclined hole 211a is formed inwardly so that the other end of the tension member 300b extends through and is fixed through the precast concrete box unit 120 that is subsequently assembled. And a second wedge-con member 220 inserted into the second wedge-cone inclined hole 211a and fixing the extended other end of the tension member 300b. Connecting device. The first embedding of claim 8, wherein the first wedge-con member 240 is positioned in the first wedge-cone inclined hole 233 before the one end of the tension member 300b is inserted. Precast concrete box unit double connection device, characterized in that the fixing spring (261) and the washer (262) is disposed between the rear end of the fixed end (210a) and the first wedge cone member (240). It is for forming concrete culvert used for installation of facilities such as water and sewage, electric power, communication, or common areas.It is precast and manufactured in the unit of the tubular structure with the front and rear sides open to the pipeline and transported to the construction site. In the precast concrete box unit connection construction method for interconnecting the precast concrete box units in which the front and rear connection surfaces in the pipeline direction are continuously connected and connected through the precast concrete box unit connection device 200, Tension member installation holes 111 and 121 are formed in the precast concrete box units 110 and 120 on both sides of the interconnection, respectively, and a first through hole tension member is provided so as to communicate with these tension member installation holes 111 and 121. And manufacturing the precast concrete box units 110 and 120 at the factory by installing the second embedding fixed ends 210a and 210b on the rear and front sides of the connection surface, respectively. Before and after the precast concrete box units (110, 120, ...) are connected back and forth in the pipeline direction at the construction site, the inner and outer double annular structure on the connection surface of the precast concrete box units (110, 120, ...) Furnace index barriers 115i and 115j are disposed, and the other end of the tension member 300a penetrating the pre-assembled precast concrete box unit 110 is fixed to the first embedded fixed end 210a, and then the first The first wedge-con member is connected to the hollow coupling member 230 to the buried fixed end 210a and is seated in the first wedge-cone inclined hole 233 formed on the inner side of the hollow coupling member 230. 240 and a spring 261 supporting the washer and the washer 262 are assembled and connected to the first buried fixing end 210a, and the cylindrical fixing member is provided at the other end of the hollow coupling member 230. Pre-installed 250 concentrically extending rearward, and subsequent assembly The cylindrical outer anchor member 270 is fastened to the second embedded fixed end 210b of the concrete box unit 120, and a tension material through hole is formed in the center of the cylindrical outer anchor member 270, and the cylindrical main rod Including the inclined wedge-shaped section 281 in the direction of the precast concrete box unit preassembled so that the fixing member 250 can be forcibly fitted, and the straight section 282 in the direction of the second buried fixed end. Install the wedge-shaped inner anchor member 280, and the wedge-shaped inner anchor member in the second embedded fixed end 210b of the precast concrete unit 120 and the cylindrical outer anchor member 270 that are subsequently assembled ( The first end of the tension member 300b extending through the 280 passes through the cylindrical anchoring member 250, so that an image on the side of the first embedded fixed end 210a of the precast concrete 110 preassembled. The connection with the preparation stage for fixing the insert 1 to the wedge cone member 240, and Precast concrete box unit, which is pre-installed with a precast concrete box unit 120, which is subsequently assembled as a reaction force, while tensioning the tension member 300b with the tension device at the other end of the precast concrete box unit 120 that is subsequently assembled ( While being pulled to the side 110, the cylindrical anchoring member 250 is forcibly fitted into the gap between the cylindrical outer anchor member 270 and the wedge-shaped inner anchor member 280 to form a main anchoring, Furthermore, the other end of the tension member 300b, which is tensioned by the tension device, is completed at the other end of the precast concrete box unit 120, which is subsequently assembled, on the first buried fixing end 210a to complete the double fixing to form an auxiliary fixing. Connection construction method of the precast concrete box unit, characterized in that it comprises a step. 11. The method of claim 10, in order to provide a construction method for effectively injecting non-contraction mortar to the connection of the interconnection culvert units, The space between the tension member installation holes 111 and 121 in which the precast concrete box unit connection device 200 is installed (the space formed by the connection surface 111v and the connection surface 121u) and the mortar groove 115v0: An index barrier member 115i, 115j is formed between the interconnected precast concrete box units 110, 120 to seal the 115a, 115b in an annular shape from the inside and the outside, and the mortar grooves 115v0: 115a, 115b. Injected with a grouting material such as non-shrink mortar through the mortar injection port 140 is installed on the upper side of the precast concrete box unit (110, 120) extending into the side wall in communication with the mortar groove (115v0: 115a, 115b) When the grouting material is discharged through the first mortar outlet 150a installed on the sidewalls of the precast concrete box units 110 and 120 in communication with the first mortar outlet 150a, the first mortar outlet 150a is closed. Pressure injection is performed by a grouting pump, and pressure injection is performed until the grouting material is discharged through the mortar outlet 150 which is installed with the bottom of the upper mortar groove of the upper mortar groove of the precast concrete box units 110 and 120 softly installed. Connection method of the precast concrete box unit characterized in that it further comprises a grouting material injection step. It is for forming concrete culvert used for installation of facilities such as water supply and sewage, electric power, communication, or common areas. In the precast concrete box unit (110, 120, 130) in which the front and rear connection surfaces are continuously connected and installed in the pipe direction, The precast concrete box unit 120 of the precast concrete box unit 120 so as to have a tension material through hole formed to communicate with the tension member installation holes (131, 111) respectively formed on both sides of the precast concrete box unit (130, 110) connected adjacent to the front and rear The first and second embedding fixed ends 210a and 210b are embedded in both connection surfaces 121v and 121u and are provided. Cylindrical outer anchor member 270 fastened to the second buried fixed end 210b to form a main fixation with the precast concrete box unit 110 pre-assembled at the front side of the precast concrete box unit 120. And a wedge-shaped inner anchor member which is positioned inside the cylindrical outer anchor member 270 and has a tension material passing hole formed in the center thereof, and includes an inclined wedge-shaped section 281 and a straight section 282. 280 is provided to the second embedded fixed end 210b, and Cylindrical outer anchor member provided in the precast concrete box unit 130 to be assembled later in order to form a main position with the precast concrete box unit 130 to be assembled later in the rear side of the precast concrete box unit 120. Precast, characterized in that the cylindrical anchoring member 250 is formed in the gap between the 270 and the wedge-shaped inner anchor member 280 is provided to the first buried fixed end (210a) Concrete box unit. The method of claim 12, In order to provide auxiliary fixing using the tension member 300b between the precast concrete box unit 120 and the pre-assembled precast concrete box unit 110, The one end of the tension member 300b installed through the precast concrete box unit 120 is fixed to the first embedded fixed end 210a installed at the rear of the precast concrete box unit 110 assembled in advance. The hollow coupling member 230 is fixedly connected to the first embedded fixed end 210a of the assembled precast concrete box unit 110, and a first coupling is formed on an inner side surface of the hollow coupling member 230. A wedgecon inclined hole 233 is formed, and a first wedgecon member 240 is installed in the first wedgecon inclined hole 233 to fix a leading end of the tension member 300b, and First embedding fixing provided on the rear connection surface 121v of the precast concrete box unit 120 to provide fixing of the other end of the tension member 300b installed through the precast concrete box unit 120. Stage 210a, The second wedge-con member 220 inserted into the second wedge-cone inclined hole 211a and the second wedge-cone inclined hole 211a to fix the other end portion of the tension member 300b. Precast concrete box unit, characterized in that comprises a.

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