KR20100014034A - Connecting apparatus and connecting method of precast concrete box units and precast concrete box unit comprising double connecting apparatus - Google Patents

Abstract

PURPOSE: An apparatus and a method for connecting precast concrete box units and a precast concrete box unit with a double connection apparatus are provided to secure enough shear resistance and bending stress resistance. CONSTITUTION: An apparatus for connecting precast concrete box units comprises first and second buried ends(210a,210b), a hollow anchor member(220) for main anchorage, a hollow coupling member(230) for main anchorage, and a hollow coupling member(240) for sub anchorage. The first and second buried ends are connected to tendon installation holes(111,121) formed respectively in precast concrete box units(110,120). The hollow anchor member for main anchorage is connected to the second buried end. The hollow coupling member for main anchorage is connected to the first buried end and engaged with the hollow anchor member for main anchorage. The hollow coupling member for sub anchorage fixes a tendon(300) to the first buried end.

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 the steel wire in a general bridge girder using such a fixing device, since 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 wire anchorage 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 8 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). There is no choice but to block out the haunch inside the PC culvert structurally vulnerable to form a lock-type steel wire anchorage (P510) or to form a separate ridge on the outside of the PC culvert. 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 apparatus, in Korean Patent Laid-Open No. 2003-0040874 (published on May 23, 2003), as shown in the accompanying drawings, FIGS. 9A to 9F. 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. A pair of wedge cone members P102 and P102 'and the end portions of the steel wires P10 and P10' are formed, and the wedge holes P104 and P104 'of the wedge cone members P102 and P102' 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 Figure 9f, when the mortar is filled in the mortar groove (P211) and the shear groove (P212) steel wire 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 case of the bidirectional steel wire fixing device according to the prior art as shown in Figure 9a to 9f, when the tension wire tension by the tension device is completed and the steel wire constituting the tension material by the fixing device is settled with the steel wire Sliding between the devices and after completion of the settlement, a certain amount of additional elongation of the steel must continue to occur, limiting to providing a firm settling, and the steel wire used as tensioning material is not recovered even after connection assembly of the PC culvert Since it is necessary to remain inside to provide connection force, excessive material costs are required, and thus, there is a problem that it is economically burdensome.

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. 9A (for example, the case in which the shear groove is installed in FIG. 9F), When the mortar is filled in the mortar groove (P211) and the shear groove (P212), the wire fixing device (P100) is also buried in the mortar may be blocked by contact with the outside air to prevent corrosion, which is shown in Figure 9f 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 flows into the steel wire installation The leakage phenomenon through the wire installation of the 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 9e 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. Installation of the steel wires P11 'used for their connection while the fourth, fifth and sixth PC culverts P204, P205 and P206 are connected, tensioned, and Since the steel wire fixing structure is formed in the right wedge-cone member P102 ', 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. 9G. 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.

On the other hand, if a construction problem occurs due to the manufacturing error of the PC culvert box unit or the horizontal error of the construction floor, release the tension of the PC steel wire, correct the error, and reassemble it while reassembling. In the case of performing the task of connecting the PC culvert units using the conventional bidirectional steel wire fixing apparatus described above, as shown in FIG. 9E, one of the plurality of steel wires used may be used. When steel wire is tensioned and settled by using tension device, the first step is completed. Remove the outer fixing end of the steel wire and cut and separate the steel wire. PC steel wire cut and not easy to remove is not reusable and material waste There is a problem that occurs, in the inconvenience that must In order to separate the liner from the two-way tension wire of the connecting device is moving the PC box culvert units connected successively in turn has a problem of considerably lowering process efficiency.

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 technical problem of the present invention is to solve the tension state of the PC steel wire when a problem occurs in connection construction between precast concrete box units due to the production error of the PC culvert box unit or the horizontal error of the construction floor. It is easier to release and correct these errors and then reassemble while reassembling them, and also recover them according to site conditions, such as foundational ground conditions, without having to permanently leave the tension material used in this connection process in the structure. It is to provide a new fixing device of economical structure that can be reused, thereby providing a more economical connection structure and connection method.

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 to be connected to the tension member installation holes respectively formed in the precast concrete box units on both sides to be interconnected and embedded in the connection surfaces;

A hollow main anchoring anchor member fixedly connected to the second embedded fixed end;

A main coupling hollow coupling member fixedly connected to the first buried fixed end and disposed to engage with the main anchoring anchor member; and

The hollow mating anchoring member and the host are tensioned by a tension member passing through the tension member passing hole of the second embedded fixed end of the precast concrete box unit and the hollow member of the hollow anchoring anchor member to be rearward assembled. It comprises a secondary coupling hollow coupling member provided to fix the tension member on the first embedded fixed end side of the precast concrete box unit pre-installed, so that the wear hollow coupling member can be fixed,

A precast concrete box unit connecting device is provided by providing a double connection between precast concrete box units by fixing the hollow main anchoring anchor member and fixing the tension member disposed therethrough.

Here, the secondary coupling hollow coupling member, the hollow portion of the hollow main anchoring anchor member of the precast concrete box unit to be subsequently assembled after the tension state of the tension member is released and the second Preferably, the tension member is pulled forward through the tension member through-holes formed in the buried fixed end, so that the tension member can be removed from the precast concrete box units.

In addition, the present invention is to be embedded in each of the connecting surface so as to communicate with the tension member installation hole formed in each of the precast concrete box unit on both sides to be interconnected, the first and second embedment having a tension member through-hole and the inner screw engaging surface Fixed stage,

A hollow main anchoring anchor member which is fastened to the inner screw engaging surface of the second buried fixed end of the precast concrete box unit which is subsequently assembled and is in communication with the tension material through hole so that the tension material sliding guide hole is formed to slide through the tension material;

For fixing the hollow main anchoring anchor member, a hollow for main anchoring having a first wedge cone member engaged with an outer circumferential surface of the hollow main anchoring anchor member, and a conical inclined surface for accommodating the first wedge cone member. A coupling member, and

The first embedding of the precast concrete box unit, which is preinstalled with a tension member passing through the tension member passing hole of the second embedding fixed end of the precast concrete box unit and a hollow extending portion of the hollow anchoring anchor member, which are subsequently assembled. It includes a secondary coupling hollow coupling member formed to include a second wedge cone member to be fixed to the fixed end side, the precast concrete box by fixing the hollow main anchoring anchor member and the tension member Provided is a precast concrete box unit connection device, characterized in that it provides dual connections between units.

In addition, in the present invention, the second wedge-con member in the auxiliary coupling hollow coupling member through the precast concrete box unit and the main coupling hollow coupling member and the hollow anchoring anchor member which are subsequently assembled Retract the interlocking secondary tension member in the direction of the precast concrete box unit previously installed together with the second wedge cone member to release the anchorage.

Tension member disengagement fittings are provided to engage the rear end of the secondary tension member, and at one end there is formed a tension member retreat assembly hole which is fastened and assembled to the tension member disassembly coupling member, and at the other end, the inner screw coupling of the first buried fixed end is provided. A coupling end for disassembling the tension member may be provided in which a screw coupling surface fastened to the surface is formed.

Furthermore, it is preferable that a PS strand can be used as the secondary tension member, and a polygonal nut groove is provided to engage the rear end portion of the PS strand, which is the secondary tension member, to the engagement member for dismantling the tension member.

In the present invention, in order to provide a continuous double connection between the tension-fixed precast concrete box unit and the tension-removable precast concrete box unit, the pre-installed primary tension member composed of PS strands in the pre-installed precast concrete box unit A fixing end including a fixing wedge provided in the first embedding fixing end to tension-tighten an end portion thereof is further provided, and further pre-assembled precast concrete box unit and the hollow coupling member for fixation and the hollow fixation. The secondary tension member composed of the PS strands engaged with the second wedge cone member in the auxiliary coupling hollow coupling member through the anchor member is retracted in the direction of the precast concrete box unit previously installed together with the second wedge cone member. To release the settlement, A coupling member for dismantling the tension member engaged with the rear end of the secondary tension member is provided in the secondary coupling hollow coupling member, and at one end, a tension member retreating assembly hole fastened and assembled to the dismantling coupling member is formed, and at the other end thereof. A tension member disengagement coupling end having a screw engagement surface fastened to an inner screw engagement surface of the first buried fixing end may be provided, and a coupler may be additionally provided which bidirectionally connects the fixing end and the tension disassembly coupling end. have.

On the other hand, in relation to the secondary tension material described above as used in the fixing device according to the present invention, a cost-effective steel rod can be used as the secondary tension material, and in this reverse rain separately to be engaged with the rear end of the PS strand In place of the tension member disassembly coupling provided, it is preferable to thread the outer peripheral surface of the steel bar to form a tension member disassembly.

Furthermore, the tension material fixing precast concrete box unit using PS strands installed on the soft ground when permanent auxiliary fixing is required, and the tension material fixing precast concrete box unit that does not remove the PS strands, Precast concrete pre-installed to provide a connection between tension removing type precast concrete box units using steel rods with steel rods as the tensioning material can be removed as it is installed on a solid plain ground (using recovery steel rods). And a fixing end including a fixing wedge provided in the first buried fixing end so as to tension-fix the end of the pre-installed primary tension member in the box unit, and having a PS strand in the box unit. Add coupler connecting in both directions It is desirable to provide as a provision.

The present invention as a more specific solution for solving the problem of reducing the material cost through the removal of the tension material of the above-described problem, each embedded in the connection surface to be connected to the tension material installation hole formed in each of the precast concrete box unit to be interconnected First and second embedding fixed end having a tension material through hole and the inner screw engaging surface,

A hollow main anchoring anchor member which is fastened to the inner screw engaging surface of the second buried fixed end of the precast concrete box unit which is subsequently assembled and is in communication with the tension material through hole so that the tension material sliding guide hole is formed to slide through the tension material;

For fixing the hollow main anchoring anchor member, a hollow for main anchoring having a first wedge cone member engaged with an outer circumferential surface of the hollow main anchoring anchor member, and a conical inclined surface for accommodating the first wedge cone member. Coupling member,

The first embedding of the precast concrete box unit, which is preinstalled with a tension member passing through the tension member passing hole of the second embedding fixed end of the precast concrete box unit and a hollow extending portion of the hollow anchoring anchor member, which are subsequently assembled. A secondary coupling hollow coupling member having a second wedge cone member engaged with the outer circumferential surface of the tension member, and a conical inclined surface for accommodating the second wedge cone member to be fixed to the fixed end side; and

And a tension member end fixing release means disposed between the first buried fixing end and the auxiliary fixing hollow coupling member to release the engagement between the tension member and the second wedge member.

After the fixing of the hollow anchoring anchor member in the main seating hollow coupling member is completed, the anchoring of the tension member in the secondary seating hollow coupling member is released, and the tension member is removed from the hollow main coupling member. The precast concrete box unit connecting device is configured to be recovered by passing through and removing the tension material through hole of the second embedded fixed end of the precast concrete box unit, which is subsequently assembled with the hollow part of the fixing anchor member. to provide.

More preferably, the tension member end fixing release means,

A coupling member for dismantling tension member provided to engage the rear end of the tension member,

A tension member retreating assembly hole is formed to which the tension member disassembly coupling tool provided to engage the rear end portion of the tension member is fastened so that the tension member engaged with the second wedge member can be retracted together with the second wedge member. The other end of the tension member dismantling coupling end having a screw engaging surface fastened to the inner screw engaging surface of the first buried fixed end, and

The tension member and the second wedge cone member are retracted backward in the hollow coupling member for auxiliary fixing while the tension member disengagement coupling member engaged with the end of the tension member is screwed into the tension member retracting assembly hole of the tension member dismantling coupling end. In this case, the second wedge-con member is installed on the second wedge-con member to release the frictional engagement between the tension member and the second wedge-con member to extend the second wedge-con member outward to allow the tension member to be removed to the outside. It consists of two wedge cone expansion elastic ring.

Furthermore, the present invention is a means for solving the problem of releasing the fixing of the already completed fixing means by the failure or error occurs during the construction of the above-described problems, and recovering the relevant device parts with a minimum loss,

When the hollow main anchoring anchor member is retracted backward, the locking jaw is formed at the rear end of the first wedge cone member so that the first wedge cone member is pushed back by being pushed by the rear end thereof.

An elastic spring disposed behind the first wedge cone member to provide elastic front and rear mobility of the first wedge cone member, and the first wedge cone member to extend outward to release frictional engagement. 1 further provides a first wedge cone expansion elastic ring installed in the wedge cone member, and

The locking jaw is formed so that the diameter of the through-holes inside, except for the portion where the locking jaw is formed to allow the tension material to pass through is larger than the outer diameter of the tension material, and the hollow type anchoring anchor member for engaging with the hollow anchoring anchor member. It provides a precast concrete box unit connection device characterized in that to be formed smaller than the outer diameter of.

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 having tension member through holes and inner threaded coupling surfaces are embedded in each of the front and rear connection surfaces to communicate with the tension member installation holes. Installing and manufacturing 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 the tension member slides through to communicate with the tension member through-holes. A hollow anchoring anchor member having a tension member sliding guide hole is fastened to the inner screw engaging surface of the second embedding fixed end of the precast concrete box unit, which is subsequently assembled, and the first embedding fixed end of the precast concrete box unit previously installed. An auxiliary coupling hollow coupling member is provided on the side, and is fitted with an outer circumferential surface of the hollow anchoring anchor member for fixing the hollow anchoring anchor member to the front of the secondary coupling hollow coupling member. Receiving a first wedge-con member and a first wedge-con member And is connected preparation step of fastening a wear ethanol hollow coupling member having a conical inclined surface therein;

A tension member is inserted to penetrate the tension member through-hole of the second embedded fixed end of the precast concrete box unit and the hollow part of the hollow main anchoring anchor member to be assembled at a later stage, and to allow one end to be fixed in the secondary coupling hollow coupling member. Tension material inserting step, and

One end of the inserted tension member is fixed in the hollow coupling member for secondary fixing, and the precast concrete box unit which is subsequently assembled as a reaction force while tensioning with the tension device at the other end of the precast concrete box unit that is subsequently assembled And a dual fixing completion step of pulling the hollow anchoring anchor member into engagement with the first wedge cone member of the hollow coupling coupling member for fixing while being pulled toward the precast concrete box unit. Provided is a method of connecting a precast concrete box unit.

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. Inject grouting material such as non-shrink mortar, but when the grouting material is discharged through the first mortar outlet installed in the upper sidewall of the precast concrete box unit in communication with the mortar groove, pressure injection with a grouting pump, free Of cast concrete box unit And a grouting material injection step of performing a pressure injection until the grouting material is discharged through a mortar outlet installed on the upper inner surface of the upper part of the mortar groove. to provide.

On the other hand, the present invention in terms of a construction method for achieving the problem of improving the economic efficiency of recovering and recycling the tension material,

After the fixing of the hollow anchoring anchor member in the hollow anchoring coupling member is completed,

A tension member end fixing release means disposed between the first buried fixing end and the auxiliary fixing hollow coupling member releases the engagement between the tension member and the second wedge-con member of the auxiliary coupling hollow coupling member. A tension member fixing release step of releasing the tension member in the fixing hollow coupling member, and

And a tension material recovery step of recovering the tension material by recovering the tension material by passing through the tension material through-hole of the second embedded fixed end of the precast concrete box unit, which is subsequently assembled with the hollow part of the hollow anchoring anchor member. To provide.

On the other hand, as a means for solving the problem of performing the necessary measures in the event of a construction error or component damage, the present invention is to the anchoring anchor member through the additional tension (re-tension) of the tension member using a tension device It further provides a step to release the settlement of.

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,

A hollow main anchoring anchor member which is fastened to the second buried fixed end at the rear side of the precast concrete box unit;

A hollow coupling member for fixation on the first embedding fixed end to be engaged with the hollow fixation anchor member of the precast concrete box unit to be subsequently assembled on the front side of the precast concrete box unit, and

Hollow type of the precast concrete box unit, which is subsequently assembled by tensioning the tension member passing through the tension member extending through the hollow part of the hollow anchoring anchor member and the tension member passing hole of the second embedded fixed end of the precast concrete box unit Precast comprising a secondary fixing hollow coupling member provided to fix the tension member to the first embedding fixed end side so that the anchoring anchor member and the hollow coupling member for fixation can be fixed. Concrete box units are also available.

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 a soft ground or the like with a high possibility of uneven settlement. According to the conditions, it is possible to remove and recycle the tension material, thus achieving a significant material cost reduction effect.In addition, the precast concrete does not depend only on the tension force of steel wire or steel wire that the prestress gradually decreases over time due to the material properties. It is possible to obtain sufficient connection stiffness in the long term from the rigid bonding according to the separate main fixing device provided directly between the box unit connections, and to easily perform necessary corrective measures in case of construction error or component damage. So that Increase US positive efficiency and further itgie internal leakage through the liner installation hole grouting material to be injected into the mortar groove of the connection can provide little or no structure may also 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. 2C is a view showing an embodiment of the BB cross section of the concrete box unit connection part, and FIG. 2C is a view showing another embodiment (an embodiment for the soft ground) of the BB cross section of the precast concrete box unit connection part shown in FIG. Figure 2d is a view showing another embodiment of the BB cross-section of the precast concrete box unit connection shown in Figure 1 (an embodiment using a steel bar), and Figure 2e is a view of the present invention shown in Figure 2b Figure 1 is a view showing an embodiment of one precast concrete box unit having a device divided on both sides according to the embodiment.

Then, an exploded perspective view of the precast concrete box unit connecting device constituting the general ground embodiment shown in FIG. 2B is shown in FIG. 3A, and the precast concrete box constituting the soft ground embodiment shown in FIG. 2C. An exploded perspective view of the unit connection device is shown in FIG. 3B, and an exploded perspective view of the precast concrete box unit connection device constituting the embodiment using the steel bar shown in FIG. 2D is shown in FIG. 3C.

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. 200 is provided, according to preferred embodiments of the invention shown in the accompanying drawings, FIGS. 2B-2D and 3A-3C.

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,

Tension material through holes 211a and 211b to communicate with the tension material installation holes 111 and 121 formed in the precast concrete box units 110 and 120 on both sides of the interconnection, respectively. Second embedding fixed ends 210a and 210b,

A hollow main anchoring anchor member 220 fixedly connected to the second embedded fixed end 210b,

A main coupling hollow coupling member 230 fixedly connected to the first buried fixed end 210a and disposed to mesh with the main anchoring anchor member 220, and

A tension member extending rearward through the tension member through-hole 211b of the second buried fixed end 210b of the precast concrete box unit 120 and the hollow portion of the hollow anchoring anchor member 220 which are subsequently assembled. The precast concrete box unit 110 pre-installed with the tension member 300 to tension the 300 so that the hollow anchoring anchor member 220 and the anchoring hollow coupling member 230 may be fixed. It comprises a secondary coupling hollow coupling member 240 provided to fix the side of the first buried fixed end (210a) of),

The fixing of the hollow anchoring anchor member 220 and the fixing of the tension member 300 disposed therethrough provide a dual connection between the precast concrete box units 110 and 120, thereby providing general ground. In addition, it is possible to provide a dual fixing device that provides sufficient shear resistance and flexural tensile resistance in connection of precast concrete box units in soft ground and the like which are likely to cause uneven settlement.

On the other hand, in the case of the general ground, not the soft ground is not necessary for permanent double anchoring, the auxiliary coupling hollow coupling member 240 for fixing with the tension member 300, the tension member 300 of the After the tension is released, the through hole formed in the hollow portion of the hollow anchoring anchor member 220 of the precast concrete box unit 120 that is subsequently assembled and the second buried fixed end 210b. It is preferable that the tension member 300 is formed to include the tension member end release releasing means so that the tension member 300 can be removed from the precast concrete box units by pulling the tension member 300 forward through the 211b. As the tension member 300, a PS strand or steel rod (see FIG. 2D) may be used.

As a more specific embodiment of the preferred embodiments of the precast concrete box unit connection device 200 described above, the precast concrete box unit connection device 200, as shown in Figure 2b,

It is installed in each of the connection surface so as to communicate with the tension member mounting holes (111, 121) formed in the precast concrete box unit (110, 120) of both sides to be interconnected, respectively, the tension member through holes (211a, 211b) and the inner screw coupling First and second embedding fixed ends 210a and 210b having faces 212a and 212b,

The tension member is fastened to the inner screw engaging surface 212b of the second buried fixed end 210b of the precast concrete box unit 120 that is subsequently assembled, and communicates with the tension material passage hole 211b to allow the tension member 300 to slide through. Hollow type anchoring anchor member 220, the sliding guide hole 221 is formed,

In order to fix the hollow anchoring anchor member 220, the first wedge cone member 231 and the first wedge cone member 231 engaged with the outer circumferential surface of the hollow anchoring anchor member 220 are accommodated. And a hollow coupling member 230 for main mounting having a conical inclined surface 232 therein, and

A tension member extending rearward through the tension member through-hole 211b of the second buried fixed end 210b of the precast concrete box unit 120 and the hollow portion of the hollow anchoring anchor member 220 which are subsequently assembled. A secondary coupling hollow coupling member formed by including a second wedge cone member 241 to fix 300 to the first embedded fixed end 210a side of the precast concrete box unit 110 previously installed. It comprises a 240, by the fixing of the hollow anchoring anchor member 220 and the fixing of the tension member 300 to provide a double connection between the precast concrete box units (110, 120).

Herein, the auxiliary coupling hollow coupling member penetrates through the precast concrete box unit 120 and the hollow coupling member 230 and the hollow anchoring anchor member 220 which are subsequently assembled. The secondary tension member 300 engaged with the second wedge cone member 241 in the 240 is retracted toward the precast concrete box unit 110 previously installed together with the second wedge cone member 241 to release the fixation. 2b to 2d, a tension release member coupler 310 is provided at a rear end of the secondary tension member 300, and at one end a release connector for dismantling the tension member ( The tension member retracting assembly hole 252 is fastened and assembled on the 310 is formed, the other end of the tension member disengagement coupling is formed on the other end screw engaging surface 253 is fastened to the inner screw engaging surface 212a of the first buried fixed end (210a) Stage 250 It is more preferred to that.

On the other hand, in the present invention, in the case of the secondary tension member 300 that is configured to be removed and recovered, it can be configured not only by PS strands but also by steel bars, which will be described below by dividing the case. Let's go.

First, referring to FIG. 2B (FIG. 3A) and FIG. 2C (FIG. 3B), referring to the configuration of the embodiment in which the secondary tension member 300 is composed of the PS strands, the PS strand is used as the secondary tension member 300, and the Polygon nut grooves are provided in the tension member dismantling coupling unit 310 so that the rear end of the secondary tension member 300 is fitted and engaged, and further, the tension member fixing precast concrete box unit using the PS strand and the tension member removing type using the PS strand. In order to provide continuous double connection between the precast concrete box units, the first pre-installed precast concrete box unit 110 is composed of PS strands to tension the ends of the pre-installed primary tension members 300. A fusing end 270 is provided, including fusing wedges provided to the fixed end 210a, and further prefabricated concrete foil The second wedge-con member 241 in the auxiliary coupling hollow coupling member 240 penetrates through the unit 120, the hollow coupling coupling member 230, and the hollow clamping anchor member 220. The secondary tension member 300 composed of PS strands engaged with the second wedge cone member 241 in the direction of the precast concrete box unit 110 previously installed together with the second wedge cone member 241 to release the fixing. A tension member disengagement coupling member 310 engaged with a rear end of the tension member 300 is provided to the auxiliary coupling hollow coupling member 240, and one end is fastened and assembled to the tension member disassembling fitting 310. The tension member retreating assembly hole 252 is formed and the other end is provided with a tension member disassembly coupling end 250 is formed with a screw engaging surface 253 fastened to the inner screw engaging surface 212a of the first buried fixed end 210a. And the fixing end 270 and the long A coupler 260 for two-way connection between the coupling for re-dissolution stage 250 is additionally provided.

On the other hand, the steel bar can be used as a secondary tension member 300, as shown in Figure 2d and 3c of the accompanying drawings, in this case, the outer peripheral surface of the steel bar by screwing the coupling member 310 for dismantling the tension material It can be easily formed.

Furthermore, in order to provide a continuous double connection between the tension-fixed precast concrete box unit using the PS strands described above and the tension-removable precast concrete box unit using the steel rods, the PS to the pre-installed precast concrete box unit Comprising a stranded wire to provide a fixing end including a fixing wedge provided in the first buried fixed end to tension the end of the primary tension member installed in advance, and connecting between the fixing end and the coupling member for dismantling the tension member in both directions It is possible to additionally provide a coupler, although the figure showing such a configuration is omitted, it can be easily understood by merging Figure 2c and Figure 2d, this embodiment is a permanent auxiliary fixing to add a PS strand Need soft ground and not so One may be understood to be useful in the boundary between the common ground (using a recovery rod).

Hereinafter, a detailed configuration of a more specific embodiment including the detailed configuration of the tension member end fixing release means shown in Figures 2b and 3a of the accompanying drawings will be described in detail.

Precast concrete box unit connection device 200 provided as a preferred embodiment of the present invention, so as to communicate with the tension member installation holes (111, 121) formed in the precast concrete box units (110, 120) on both sides to be interconnected, respectively. First and second embedded fixing ends 210a and 210b having tension passage holes 211a and 211b and inner screw engaging surfaces 212a and 212b, respectively, which are installed in the connection surface, and are precast. The tension member sliding guide hole 221 is fastened to the inner screw coupling surface 212b of the second buried fixed end 210b of the concrete box unit 120 and communicates with the tension member through-hole 211b so that the tension member 300 slides through. The first wedge-con member is engaged with the outer circumferential surface of the hollow anchoring anchor member 220 for fixing the hollow anchoring anchor member 220 and the hollow anchoring anchor member 220. 231), and the first wedge cone portion A hollow coupling member 230 for main mounting having a conical inclined surface 232 for accommodating 231 therein, and the second buried fixed end 210b of the precast concrete box unit 120 that is subsequently assembled. The first buried fixed end of the precast concrete box unit 110, which is pre-installed with a tension member 300 extending through the tension member through hole 211b and the hollow portion of the anchoring anchor member 220 in the rear ( A secondary wedge cone member 241 engaged with the outer circumferential surface of the tension member 300 and a conical inclined surface 242 for accommodating the second wedge cone member 241 to be fixed to the 210a side. It is disposed between the fixing hollow coupling member 240, and the first buried fixed end (210a) and the auxiliary fixing hollow coupling member 240, the tension member 300 and the second wedge cone Tension member end release release for releasing engagement of member 241 Including the end, so that after the fixing of the hollow anchoring anchor member 220 in the hollow coupling member 230 for the anchoring is completed, the secondary coupling hollow coupling member 240 The fixing of the tension member 300 in the second and the second member of the precast concrete box unit 120 is subsequently assembled with the hollow portion of the hollow main anchoring anchor member 220. It is configured to be recovered by passing through and remove the tension material passage hole (211b) of the fixed end (210b).

Here, the tension member end release release means is shown in Figure 2b and 3a, the tension member disengagement coupling 310 provided to engage the rear end of the tension member 300, and the second wedge The tension member disassembly coupler 310 engaged with the rear end of the tension member 300 at one end so as to retract the tension member 300 engaged with the cone member 241 together with the second wedge cone member 241. Tension member retreat assembly hole 252 is fastened and assembled is formed on the other end of the tension member disassembly coupling end 250 having a screw engaging surface 253 is fastened to the inner screw engaging surface 212a of the first buried fixed end (210a) ), And the tension member 300 and the engagement member 310 for engaging with the end of the tension member 300 are screwed to the tension member backward assembly hole 252 of the tension member dismantling coupling end 250. 2 Wedge cone member 241 is a hollow for secondary fixing When retracting backward in the coupling member 240, the frictional engagement between the tension member 300 and the second wedge cone member 241 is released to allow removal of the tension member 300 to the outside. Preferably, the second wedge cone member 241 includes a second wedge cone extension elastic ring 244 (C-type elastic ring) installed in the second wedge cone member 241 to extend outward. .

Here, when the PS strand is used as the tension member 300, the tension member dismantling coupler 310 is formed by forming a hexagonal nut groove on the rear end side of the PS strand (for example, six pairs priority type) The rear end of the PS strand can be inserted into the hexagonal nut groove to take a structure that can be engaged enough to rotate the disengagement coupler 310 in the same direction by the rotation of the strand.

On the other hand, in order to control the frictional engagement between the hollow anchorage anchor member 220 and the first wedge cone member 231, after the hollow anchorage anchor member 220 retreats backward A latching jaw 231a is formed at the rear end of the first wedge cone member 231 so that the first wedge cone member 231 is also retracted by being pushed by an end portion, and

Disposed behind the first wedge-con member 231 (as shown in the drawing of FIG. 2B, etc., between the secondary coupling hollow coupling member 240 and the first wedge-con member 231). An elastic spring 236 that provides elastic front and rear mobility of the first wedge member 231, and the first wedge to extend outwardly to allow the first wedge member 231 to release frictional engagement. It is preferable to further include a first wedge cone expansion elastic ring (234, C-type elastic ring) installed in the cone member 231, and further between the first wedge cone member 231 and the elastic spring 236. More preferably, the spring washer 237 is disposed.

Here, the locking jaw 231a has a diameter d2 of the through-holes except for a portion where the locking jaw 231a is formed so that the tension member 300 can pass through the first wedge-con member 231. It has a larger value than the outer diameter of 300, but is formed smaller than the outer diameter (d1) of the hollow anchoring anchor member 220.

In addition, a space for the first wedgecon member 231 to retreat is secured on the rear inner surface of the main coupling hollow coupling member 230 so as to facilitate the external expansion of the first wedgecon member 231. It would be desirable to provide a margin close to the straight wall for this purpose.

Furthermore, the first wedge-con member 231 compresses the elastic spring 236 and retreats backward to the outside by an elastic force spreading to the outside of the first wedge-cone elastic ring 234 (C type elastic ring). Expanded to maintain the expanded state such that the minimum inner diameter between the wedge cones of the first wedge cone member 231 becomes 'd0' of FIG. 5d to be larger than the outer diameter 'd1' of the hollow anchoring anchor member 220. The locking protrusion 235a protrudes from the outer surface of the first wedge-con member 231, and the locking protrusion 235a is seated on the rear inner surface of the main coupling hollow coupling member 230. A locking groove 235b to be fixed may be provided.

On the other hand, in the double-connected connection structure, when the tension is settled by the tension member 300, it is necessary to provide resistance to bending tension as in the case where an culvert is installed in a soft ground with a high risk of uneven settlement. As shown on the left side of 2c, the tension member 300 may be left in the structure without taking any recovery action. When the soft ground section and the general ground section are connected, the precast concrete box unit additionally connected to the next may be connected to a unit having a tension member removing structure. Thus, the tension fixing type tension member fixing precast concrete box unit may be connected. And the first buried fixation to tension the end of the primary tension member 300 previously installed in the precast concrete box unit 110 previously installed in order to provide a continuous double connection between the tension relief type precast concrete box unit. A fixing stage 270 including a fixing wedge provided at the stage 210a is provided, and further, a precast concrete box unit 120 and the hollow coupling member 230 and the hollow main pillar for fixing the post assembly are further assembled. The hollow coupling part for the secondary fixing through the fixing anchor member 220 The secondary tension member 300 engaged with the second wedge cone member 241 in the ash 240 can be retracted along with the second wedge cone member 241 in the direction of the precast concrete box unit 110 previously installed. , The tension member dismantling coupler 310 engaged with the rear end of the secondary tension member 300 is provided to the secondary coupling hollow coupling member 240, and at one end the coupler 310 for dismantling the tension member. The tension member retreat assembly hole 252 is fastened and assembled to the other end of the tension member disassembly coupling end is formed on the other end screw engaging surface 253 is fastened to the inner screw coupling surface 212a of the first buried fixed end (210a) ( 250 is provided, and the coupler 260 for bidirectionally connecting between the fixing end 270 and the disengagement coupling end 250 for tension release may be additionally installed.

In relation to a preferred embodiment of the present invention, as described above, the above-described tension member 300 may be used as a PS strand (PS steel wire) or a steel bar, in the case of recovering the tension material 300 in the general ground rather than the soft ground The need to use expensive PS strands is low, so it may be economical to use steel rods as shown in Figure 2d, in which case the outer circumferential surface of the tension member 300 formed of steel rods is screwed to disengage the tension member. The sphere 310 can be formed simply. In addition, the above-described wedge-con members 231 and 241 may be composed of a plurality of wedges divided into two or three circumferences, and the wedges thus divided may be formed by a wedge-con assembly ring such as a rubber ring installed in the circumferential direction on the outer surface. The elastic extension is performed by 233 and 243, and the spreading action is performed by the C-shaped metal elastic extension rings 234 and 244 provided in the circumferential direction on the inner surface.

Next, as a description of the operating 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 follows as shown in Figures 4a to 4g It will be described as a method invention constituted.

Method of connecting the precast concrete box unit using the device according to the invention,

The 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 the tension material passage holes in the front and rear connection surfaces so as to communicate with the tension member installation holes 111 and 121, respectively. Factory manufacturing of the precast concrete box units 110 and 120 by installing and installing the first and second embedding fixed ends 210a and 210b having the 211a and 211b and the inner screw engaging surfaces 212a and 212b. (See FIG. 1, FIG. 4A),

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 blocking member (115i, 115j) is disposed, and in communication with the tension member through-hole (211b) follow the hollow main anchoring anchor member 220 is formed with a tension member sliding guide hole 221 so that the tension member 300 is sliding through. It is fastened to the inner screw engaging surface 212b of the second buried fixed end 210b of the precast concrete box unit 120 to be assembled, and the first buried fixed end of the precast concrete box unit 110 previously installed ( To install the secondary coupling hollow coupling member 240 on the side 210a, and to fix the hollow main anchoring anchor member 220 in front of the secondary coupling hollow coupling member 240, The hollow main Main coupling hollow coupling member having a first wedge cone member 231 engaged with the outer circumferential surface of the fixing anchor member 220, and a conical inclined surface 232 for accommodating the first wedge cone member 231. A connection preparation step of fastening 230 (see FIG. 4B, which may include a stationary process of the precast concrete box unit as shown in FIG. 4C),

Subsequent assembly of the precast concrete box unit 120 through the tension member through hole 211b of the second buried fixed end 210b and the hollow portion of the hollow main anchoring anchor member 220 A tension member insertion step (see FIG. 4D) for inserting the tension member 300 so that one end of the coupling member 240 may be fixed, and

One end of the inserted tension member 300 is fixed in the secondary coupling hollow coupling member 240, and as a reaction force while tensioning with the tension device at the other end of the precast concrete box unit 120 to be assembled later The precast concrete box unit 120 that is subsequently assembled is pulled toward the precast concrete box unit 110 installed in advance, so that the hollow anchoring anchor member 220 is disposed on the hollow coupling member 230 of the anchoring hollow coupling member 230. It provides a method of connecting the precast concrete box unit comprising a double fixing completion step (see Fig. 4e) to be fixed in engagement with the first wedge cone member 231.

Here, the process in which the hollow main anchoring anchor member 220 is engaged with and fixed to the first wedge-con member 231 of the main anchoring hollow coupling member 230 will be described in detail with reference to FIG. 4E. When the precast concrete box unit 120, which is subsequently assembled, is pulled toward the precast concrete box unit 110 installed in advance, the hollow anchoring anchor member 220 is formed of the hollow coupling member 230. 1 is entered into the wedge cone member 231, the minimum inner diameter of the first wedge cone member 231 is narrower than the diameter (d1) of the outer circumferential surface of the main coupling hollow coupling member 230, the friction engaging operation While fixing is performed as shown in FIG. 4E, in the dual fixing process according to the present invention, the rear end of the main coupling hollow coupling member 230 has a locking jaw of the rear end of the first wedge cone member 231. 23 It is preferable to complete the fixing before contacting 1a), and as shown in the drawing, the rear displacement is not applied so as to compress the elastic spring 236 at the rear side even when the locking jaw 231a is touched. It is preferable not to allow one wedge-con member 231 to retreat. For this purpose, a separate wooden spacer is formed between the pre-cast concrete box unit 120 and the pre-installed precast concrete box unit 110 which are subsequently assembled. Spacers (not shown) may be disposed.

On the other hand, after the fixing of the hollow main anchoring anchor member 220 in the main anchoring hollow coupling member 230 is completed, the first embedded fixed end 210a and the secondary anchoring hollow coupling As the tension member end fixing release means disposed between the members 240, the second wedge-con member 241 of the tension member 300 and the auxiliary coupling hollow coupling member 240 is released to release the auxiliary fixing. The tension member fixing release step of releasing the fixing of the tension member 300 in the hollow coupling member 240, and the tension member 300 is subsequently assembled with the hollow portion of the hollow main anchoring anchor member 220 The construction method further includes a tension material recovery step (see FIGS. 4F and 4G) to recover by passing through and removing the tension material through-hole 211b of the second embedded fixed end 210b of the precast concrete box unit 120. The present invention Provided from a special perspective.

Referring to FIG. 4F, the tension member fixing release step will be described in more detail. The tension fixing member 300 may be engaged with the second wedge-con member 241 of the auxiliary coupling hollow coupling member 240 by releasing the engagement state. In order to release the tension member 300 from the hollow coupling member 240, the tension force of a tension device (not shown) that is tensioning the tension member 300 is first released, and the tension member 300 is rotated. By screwing to the tension member retracting assembly hole 252 of the tension member disassembly coupling end 310 engaged with the rear end of the tension member 300 and the tension member disassembly coupling end 250 fastened to the first buried fixed end (210a). Retracts the tension member 300, thereby allowing the tension member 300 and the second wedge cone member 241 to retreat backwards in the auxiliary coupling hollow coupling member 240, wherein the second wedge cone member Second wedge cone expansion elastic ring (244, type C) installed in 241 Elastic ring) causes the second wedge-con member 241 to extend outwardly with its elastic force, thereby releasing the frictional engagement between the tension member 300 and the second wedge-con member 241.

Furthermore, the tension member 300 in which the friction engagement with the second wedge-con member 241 is released in the hollow coupling member 240 for the auxiliary fixing may be removed to the outside as shown in FIG. 4G. do.

Of course, in the case of using the connection device 200 for providing the dual fixing according to the present invention, the tension material is removed, as shown in the accompanying drawings 5a to 5d so that problems of construction errors or component defects can be easily solved Even after the construction is completed once (see FIG. 5A), the tension member 300 is reinserted (see FIG. 5B), and is disposed between the first embedding fixing end 210a and the auxiliary fixing hollow coupling member 240. Actuating the tension member end release release means in the opposite direction (to engage the rear end of the tension member 300 to the tension member disassembly fittings 310 screwed to the tension member retraction assembly hole 252 of the tension member disassembly coupling end 250). And rotate in the opposite direction of the screw fastening and retract the tension member disengagement coupler 310 and the tension member 300, whereby the tension member 300 and the second wedge cone member 241 is a secondary coupling hollow coupling member ( 240 within the front The second wedge-con member 241 of the tension member 300 and the auxiliary coupling hollow coupling member 240 by restoring to the auxiliary coupling hollow coupling member 240. After the step of achieving the repositioning of the tension member 300 (see Fig. 5c), the front end of the rear end portion of the tension member 300 has been re-assembled the outer side of the precast concrete box unit 120 is assembled By further tension (re-tension) using a tensioning device (not shown), the subsequent assembled precast concrete box unit 120 is further moved to the left with its reaction force, as shown in FIG. In the worn hollow coupling member 220, the hollow anchoring anchor member 220 retreats backward, and the rear end pushes the locking step 231a formed at the rear end of the first wedge-con member 231; The catching jaw 231a is a tension member The diameter (d2) of the through-hole except for the portion where the engaging jaw (231a) is formed so that the 300 can pass through the first wedge cone member 231 has a larger value than the outer diameter of the tension member 300, Since it is formed smaller than the outer diameter (d1) of the hollow main anchoring anchor member 220 is caught by the locking jaw, and thus compressing the elastic spring 236 disposed behind the first wedge cone member 231 It provides an elastic rearward movement of the first wedge cone member 231.

On the other hand, the first wedge cone member 231 which is moved in the rear in this way is provided with a first wedge cone expansion elastic ring 234 (C-shaped elastic ring), the first wedge cone member 231 to the outside As a result, the step of releasing the frictional engagement between the first wedge-con member 231 and the main anchoring anchor member 220 proceeds.

At this time, a rear portion of the main coupling hollow coupling member 230 is provided with a portion close to a straight wall to secure a space for the first wedge-con member 231 to retreat, so that the first wedge The outer member of the cone member 231 can be easily expanded, and the locking protrusion 235a protruding from the outer surface of the first wedge cone member 231 has a rear inner surface of the main coupling hollow coupling member 230. Wedge cone of the first wedge cone member 231 extended to the outside by the elastic force spread outwardly of the first wedge cone expansion elastic ring (234, C-type elastic ring) by being seated and fixed in the locking groove 235b of the The minimum inner diameter between them may be 'd0' of FIG. 5d to maintain an extended state so as to be larger than the outer diameter 'd1' of the hollow main anchoring anchor member 220.

As described above, when the fixing of the hollow anchoring anchor member 220 is released, after releasing additional tension provided for retension of the tension member 300, as necessary (ie, depending on the cause of construction error), FIG. 5E. As shown in FIG. 5F, a method of separating the pre-assembled precast concrete box unit 120 or removing and removing the tension member 300 as shown in FIG. 5F may be selected. Here, the step of removing and separating the tension member 300 from the tension member 300 may be performed by a method substantially the same as that described above with reference to FIGS. 4F and 4G.

6A to 6D illustrate an embodiment of a double-fixed connection construction method of interconnecting precast concrete box units in soft ground using the precast concrete box unit connection device shown in FIGS. 2C and 3B. Precast concrete box unit, which is installed in the soft ground in the case of semi-permanent or permanent subsidiary fixing using tension material, followed by the tension fixing type precast concrete box unit that does not remove the PS strand. The dual fixing connection construction method for connecting the unit,

The 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 the tension material passage holes in the front and rear connection surfaces so as to communicate with the tension member installation holes 111 and 121, respectively. The precast concrete box units 110 and 120 are manufactured at the factory by installing the first and second embedding fixed ends 210a and 210b having the 211a and 211b and the inner screw engaging surfaces 212a and 212b. Steps,

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 blocking member (115i, 115j) is disposed, and in communication with the tension member through-hole (211b) follow the hollow main anchoring anchor member 220 is formed with a tension member sliding guide hole 221 so that the tension member 300 is sliding through. It is fastened to the inner screw engaging surface 212b of the second buried fixed end 210b of the precast concrete box unit 120 to be assembled, and is pre-installed precast concrete box unit as shown in FIGS. 6A and 6B ( Coupler 260 and the coupler dismantling end to the fixing stage 270, which is composed of a PS strand in the 110, and settles the ends of the pre-installed primary tension member (300, tension member not removed by being installed in the soft ground) Fastening and assembling 250, install the secondary coupling hollow coupling member 240 to the dismantling coupling end 250 for the tension member, and the front of the secondary coupling hollow coupling member 240 In order to fix the hollow anchoring anchor member 220, the first wedgecon member 231 and the first wedgecon member 231 engaged with the outer circumferential surface of the hollow anchoring anchor member 220 may be accommodated. A connection preparation step of fastening the main coupling hollow coupling member 230 having the conical inclined surface 232 therein;

As illustrated in FIG. 6C, the hollows of the hollow material fixing anchor member 220 and the tension material passing hole 211b of the second embedded fixed end 210b of the precast concrete box unit 120 are subsequently assembled. A tension member insertion step of inserting the tension member 300 to penetrate the portion and allow one end portion to be fixed in the hollow coupling member 240 for auxiliary fixing, and

As shown in FIG. 6D, one end of the inserted tension member 300 is settled in the auxiliary coupling hollow coupling member 240, and the other end of the precast concrete box unit 120 which is subsequently assembled The precast concrete box unit 120, which is assembled as a reaction force while being tensioned by the tension device, is pulled toward the precast concrete box unit 110 installed in advance, and the hollow type anchoring anchor member 220 is hollowed out for the main mounting. And a double fixing completion step of engaging with the first wedge-con member 231 of the coupling member 230.

In the above method, in the connection preparation step, the fixing unit is fixed to the end of the primary tension member 300 (tension material not installed and removed on the soft ground) of the PS strands previously installed in the precast concrete box unit 110 installed in advance. The rest of the process is the same except that the stage 270 is provided, and the coupler 260 provided for connection with the coupling end 250 for dismantling the tension member is installed at the fixing stage 270. Can be.

On the other hand, the pre-installed precast concrete box unit 110 is located on the soft ground to fix the front end of the tension member 300 composed of the PS strands in the precast concrete box unit 110 to remain permanently fixed so that the overall connection rigidity In the case of the precast concrete box unit 120 to be assembled, if there is no need for permanent subsidiary fixing by the tension material as the general ground, rather than the soft ground, the precast concrete box unit 120 to be assembled After completing the assembly step of FIG. 6d, the tension member may additionally perform the step of removing the long steel / separating the precast concrete box unit as shown in FIGS. 4F-4H, in this case removing As the tension member 300 can be used a steel rod as shown in Figure 2d That is as described above.

In a further preferred embodiment of the construction method according to the invention, the space between the tension member installation holes 111 and 121 in which the precast concrete box unit connection device 200 is installed, as shown in the accompanying drawings, FIGS. 7A to 7H. An index barrier member 115i, 115j for sealing the parts 111a and 121a and the mortar groove 115b in an annular shape from inside and outside is disposed between the interconnected precast concrete box units 110 and 120, and In communication with the mortar groove (115b) is installed on the upper side of the precast concrete box unit (110, 120) to inject a grouting material such as non-shrink mortar through the mortar injection port 140 extending to the side wall, the mortar groove (115b) When the grouting material is discharged through the first mortar outlet (150a) installed in the upper sidewalls of the precast concrete box unit (110, 120) in communication with the In addition, the grouting material injection step of performing a pressure injection until the grouting material is discharged through the mortar outlet 150 is installed on the upper inner surface of the upper mortar groove of the upper cast mortar groove of the precast concrete box unit (110, 120) It is preferable to improve the rigidity and watertightness of the joint.

On the other hand, the present invention is a precast concrete box unit product having a connection device having the above-described technical features and is a unit suitable for use in the construction method described above, as shown in Figure 2e in the pipe direction In the precast concrete box unit (110, 120, 130) in which the front and rear connection surfaces are continuously connected and installed,

Precast concrete box so as to be provided with tension material through-holes (211a, 211b) formed to communicate with the tension material installation holes (131, 111, respectively) formed on both sides of the precast concrete box unit (130, 110) connected adjacently in front and rear The first and second embedding fixed ends 210a and 210b are provided and installed on both connection surfaces 121v and 121u of the unit 120, and the second embedding is provided at the rear side of the precast concrete box unit 120. Hollow anchorage anchor member 220 fastened to the fixed end 210b and hollow anchorage anchor member of the precast concrete box unit 130 to be subsequently assembled at the front side of the precast concrete box unit 120. A second coupling of the pre-installed concrete box unit 130 and a pre-installed hollow coupling member 230 fastened to the first buried fixed end 210a to be interlocked with the 220, and subsequently assembled. Tension member 300 of the front end 210b and the tension member 300 extending rearward through the hollow portion of the hollow main anchoring anchor member 220 are tensioned and then assembled into the precast concrete box unit 130. It is provided to fix the tension member 300 to the first buried fixing end 210a side so that the fixing of the hollow anchoring anchor member 220 and the hollow coupling member 230 for anchoring can be made. Provided is a precast concrete box unit 120 comprising a hollow coupling member 240 for auxiliary fixing, as described above by using a plurality of such precast concrete box unit (110, 120, 130) connection The dual connection device and the connection construction method can be easily implemented.

Although the present invention has been described in detail with reference to preferred embodiments, it will be apparent to those skilled in the art that the present invention may be implemented in other specific forms without changing the technical spirit or essential features thereof. One embodiment is to be understood in all respects as illustrative and not restrictive.

And 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 within the scope of the present invention. It should be interpreted as being included.

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;

FIG. 2C is a view showing another embodiment of the B-B cross section of the precast concrete box unit connecting portion shown in FIG. 1 (an embodiment for soft ground); FIG.

Figure 2d is a view showing another embodiment of the B-B cross section of the precast concrete box unit connection shown in Figure 1 (an embodiment using a steel bar).

Figure 2e is a view showing one precast concrete box unit having a device divided on both sides in accordance with an embodiment of the present invention shown in Figure 2b.

Figure 3a is an exploded perspective view of the precast concrete box unit connection device constituting the embodiment for the general ground shown in Figure 2b.

FIG. 3B is an exploded perspective view of a precast concrete box unit connection device constituting the soft ground embodiment shown in FIG. 2C; FIG.

Figure 3c is an exploded perspective view of the precast concrete box unit connection device constituting the embodiment using the steel rod shown in Figure 2d.

4A to 4G are steps of a construction method of interconnecting precast concrete box units in a general ground and removing and recovering tension material (PS strand) using the precast concrete box unit connection device shown in FIGS. 2B and 3A. Drawings showing them.

5A to 5F illustrate that the precast concrete box units are interconnected in the general ground using the precast concrete box unit connecting device shown in FIGS. 2B and 3A, and then the Illustrating steps for releasing a connected state.

Figures 6a to 6d show the steps of the double-fixed connection construction method of interconnecting the precast concrete box unit in soft ground using the precast concrete box unit connection device shown in Figures 2c and 3b.

7a to 7h show a grouting embodiment of the precast concrete box unit connection according to the invention.

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

9a to 9g 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: precast concrete box unit

200: precast concrete box unit connection device

210a and 210b: first and second embedding fixed end 220: hollow main anchoring anchor member

230: hollow coupling member for main fixing 240: hollow coupling member for auxiliary fixing

300: tension member (PS strand or rod) 400: tension device

Claims (32)

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 to be connected to the tension member installation holes respectively formed in the precast concrete box units on both sides to be interconnected and embedded in the connection surfaces; A hollow main anchoring anchor member fixedly connected to the second embedded fixed end; A main coupling hollow coupling member fixedly connected to the first buried fixed end and disposed to engage with the main anchoring anchor member; and The hollow mating anchoring member and the host are tensioned by a tension member passing through the tension member passing hole of the second embedded fixed end of the precast concrete box unit and the hollow member of the hollow anchoring anchor member to be rearward assembled. It comprises a secondary coupling hollow coupling member provided to fix the tension member on the first embedded fixed end side of the precast concrete box unit pre-installed, so that the wear hollow coupling member can be fixed, Precast concrete box unit connection device characterized in that to provide a double connection between the precast concrete box units by the fixing of the hollow main anchoring anchor member and the fixing of the tension member disposed therethrough. The hollow coupling member of claim 1, wherein the auxiliary coupling hollow coupling member comprises: a hollow portion of the hollow main anchoring anchor member of the precast concrete box unit which is subsequently assembled after the tension state of the tension member is released; And a tension member end fixing release means so that the tension member can be removed from the precast concrete box units by passing the tension member forward through the tension member through-hole formed in the second buried fixed end. Precast concrete box unit connection device. The precast concrete box unit connection device according to claim 1 or 2, wherein a PS stranded wire or a steel bar is used as the tension member. 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, It is installed in each of the connection surface so as to communicate with the tension member mounting holes (111, 121) formed in the precast concrete box unit (110, 120) of both sides to be interconnected, respectively, the tension member through holes (211a, 211b) and the inner screw coupling First and second embedding fixed ends 210a and 210b having faces 212a and 212b, The tension member is fastened to the inner screw engaging surface 212b of the second buried fixed end 210b of the precast concrete box unit 120 that is subsequently assembled, and communicates with the tension material passage hole 211b to allow the tension member 300 to slide through. Hollow type anchoring anchor member 220, the sliding guide hole 221 is formed, In order to fix the hollow anchoring anchor member 220, the first wedge cone member 231 and the first wedge cone member 231 engaged with the outer circumferential surface of the hollow anchoring anchor member 220 are accommodated. And a hollow coupling member 230 for main mounting having a conical inclined surface 232 therein, and A tension member extending rearward through the tension member through-hole 211b of the second buried fixed end 210b of the precast concrete box unit 120 and the hollow portion of the hollow anchoring anchor member 220 which are subsequently assembled. A secondary coupling hollow coupling member formed by including a second wedge cone member 241 to fix 300 to the first embedded fixed end 210a side of the precast concrete box unit 110 previously installed. It comprises a 240, by the fixing of the hollow anchoring anchor member 220 and the fixing of the tension member 300 to provide a double connection between the precast concrete box units (110, 120, ...) Precast concrete box unit connection device, characterized in that. The method of claim 4, wherein Additionally, the auxiliary coupling hollow coupling member 240 penetrates through the precast concrete box unit 120, the hollow coupling member 230 for fixation, and the hollow fixation anchor member 220. Retract the secondary tension member 300 engaged with the second wedge cone member 241 in the direction of the precast concrete box unit 110 previously installed together with the second wedge cone member 241 to release the fixation. , At the rear end of the secondary tension member 300 is provided with a coupling member 310 for dismantling tension material, and At one end, a tension member retreating assembly hole 252 is formed to be fastened and assembled at the disengagement coupler 310, and at the other end, a screw engagement surface fastened to an inner thread coupling surface 212a of the first buried fixed end 210a ( Pre-cast concrete box unit connection device, characterized in that provided is a coupling end 250 for dismantling the tension member 253 is formed. The method according to claim 5, wherein the PS strand is used as the secondary tension member 300, and the coupling member 310 for dismantling the tension member is provided with a polygonal nut groove so that the rear end of the secondary tension member 300 is fitted. Precast concrete box unit connection device. The method according to claim 6, to provide continuous double connection between the tension member anchoring precast concrete box unit using PS strand and the tension member removal precast concrete box unit using PS strand. A fixing stage 270 including a fixing wedge provided in the first buried fixing end 210a to tension-fix an end portion of the pre-installed primary tension member 300 in a pre-installed precast concrete box unit 110 and configured as a PS strand. ) Is provided, and Additionally, the auxiliary coupling hollow coupling member 240 penetrates through the precast concrete box unit 120, the hollow coupling member 230 for fixation, and the hollow fixation anchor member 220. The secondary tension member 300, which is composed of the PS strands engaged with the second wedge cone member 241, is retracted toward the precast concrete box unit 110 previously installed together with the second wedge cone member 241 for fixing. To unlock it, A coupling member 310 for disassembling the tension member engaged with the rear end of the secondary tension member 300 is provided in the secondary coupling hollow coupling member 240, At one end, a tension member retreating assembly hole 252 is formed to be fastened and assembled at the disengagement coupler 310, and at the other end, a screw engagement surface fastened to an inner thread coupling surface 212a of the first buried fixed end 210a ( 253 is provided a coupling end 250 for dismantling the tension member, and Precast concrete box unit connection device, characterized in that is provided by the coupler (260) for connecting in both directions between the fixing end (270) and the coupling member for dismantling the tension member (250). The precast concrete box unit connection device according to claim 5, wherein a steel bar is used as the secondary tension member (300), and the coupling member for dismantling the tension member (310) is formed by screwing an outer circumferential surface of the steel rod. The method according to claim 8, wherein in order to provide continuous double connection between the tension fixing type precast concrete box unit using the PS strand and the tension removing type precast concrete box unit using the steel rod, A fixing stage 270 including a fixing wedge provided in the first buried fixing end 210a to tension-fix an end portion of the pre-installed primary tension member 300 in a pre-installed precast concrete box unit 110 and configured as a PS strand. ) Is provided, and Precast concrete box unit connection device, characterized in that is provided by the coupler (260) for connecting in both directions between the fixing end (270) and the disengagement coupling end (250). 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. A precast concrete box unit connecting device for interconnecting precast concrete box units in which front and rear connecting surfaces are continuously connected and connected in a pipe direction, It is installed in each of the connection surface so as to communicate with the tension member mounting holes (111, 121) formed in the precast concrete box unit (110, 120) of both sides to be interconnected, respectively, the tension member through holes (211a, 211b) and the inner screw coupling First and second embedding fixed ends 210a and 210b having faces 212a and 212b, The tension member is fastened to the inner screw engaging surface 212b of the second buried fixed end 210b of the precast concrete box unit 120 that is subsequently assembled, and communicates with the tension material passage hole 211b to allow the tension member 300 to slide through. Hollow type anchoring anchor member 220, the sliding guide hole 221 is formed, In order to fix the hollow anchoring anchor member 220, the first wedge cone member 231 and the first wedge cone member 231 engaged with the outer circumferential surface of the hollow anchoring anchor member 220 are accommodated. And a hollow coupling member 230 for main seating having a conical inclined surface 232 therein, A tension member extending rearward through the tension member through-hole 211b of the second buried fixed end 210b of the precast concrete box unit 120 and the hollow portion of the hollow anchoring anchor member 220 which are subsequently assembled. A second wedge cone member 241 engaged with an outer circumferential surface of the tension member 300 to fix 300 to the first embedded fixed end 210a side of the precast concrete box unit 110 previously installed, and A secondary coupling hollow coupling member 240 having a conical inclined surface 242 for receiving a second wedge member 241 therein, and The tension member end fixing part disposed between the first buried fixing end 210a and the auxiliary fixing hollow coupling member 240 to release the engagement between the tension member 300 and the second wedge cone member 241. Including release means, After the fixing of the hollow main anchoring anchor member 220 in the main anchoring hollow coupling member 230 is completed, the tension member 300 of the secondary anchoring hollow coupling member 240 is formed. Release the fixation, the tension member 300 is passed through the tension member of the second buried fixed end 210b of the precast concrete box unit 120 is subsequently assembled with the hollow portion of the hollow anchoring anchor member 220 Precast concrete box unit connection device, characterized in that configured to be recovered by passing through the ball (211b). The method of claim 10, wherein the tension member end fixing release means, A coupling member 310 for dismantling the tension member provided to engage the rear end of the tension member 300; The tension member 300 coupled to the rear end of the tension member 300 at one end so that the tension member 300 engaged with the second wedge member 241 may be retracted together with the second wedge member 241. Tension material retraction assembly hole 252 is fastened and assembled to the sphere 310 and the other end for dismantling the tension member formed with a screw engaging surface 253 is fastened to the inner screw engaging surface 212a of the first buried fixed end (210a) Coupling stage 250, and The tension member 300 and the second wedge cone member are screwed to the tension member retracting assembly hole 252 of the tension member dismantling coupling end 250 engaged with the end of the tension member 300. When the 241 retreats backward in the secondary coupling hollow coupling member 240, the frictional engagement between the tension member 300 and the second wedge cone member 241 is released, thereby providing the tension member 300. A second wedge cone extension elastic ring 244 (C-type elastic ring) installed in the second wedge cone member 241 to extend the second wedge cone member 241 to the outside so as to be removed to the outside. Precast concrete box unit connection device comprising a. The method of claim 11, PS strands are used as the tension member 300, and the precast concrete box unit is provided with a polygonal nut groove provided at the rear end portion of the secondary tension member 300 to be engaged with the coupling member 310 for dismantling the tension member. Connecting device. The method according to any one of claims 10 to 12, In order to control the friction engagement between the hollow main anchoring anchor member 220 and the first wedge cone member 231, When the hollow anchoring anchor member 220 retreats backward, the locking jaw 231a is pushed by the rear end thereof so that the first wedge-con member 231 also retreats backward. Formed at the rear end of 231; An elastic spring 236 disposed behind the first wedge cone member 231 to provide elastic front and rear mobility of the first wedge cone member 231, and the first wedge cone to release frictional engagement. A first wedge-cone elastic ring 234 (C-shaped elastic ring), which is installed on the first wedge-con member 231, is additionally provided to extend the member 231 to the outside, and The catching jaw 231a has a diameter d2 of a through hole excluding the portion where the catching jaw 231a is formed so that the tension member 300 can pass through the first wedge-con member 231. It is formed to be larger than the outer diameter of the precast concrete box unit, characterized in that smaller than the outer diameter (d1) of the hollow anchoring anchor member 220 for engaging with the hollow anchoring anchor member 220 Connecting device. The precast concrete box unit connection device according to claim 13, wherein a spring washer (237) is disposed between the first wedge cone member (231) and the elastic spring (236). The first wedge-con member 231 of claim 13, wherein the first wedge-con member 231 is formed on a rear inner surface of the main coupling hollow coupling member 230 so as to easily expand outwardly due to the rear retreat of the first wedge-con member 231. Precast concrete box unit connection device, characterized in that a clearance close to the straight wall is provided to secure a space for retreat. 16. The method of claim 15, wherein the first wedge cone member 231 is opened to the outside of the first wedge cone expansion elastic ring (234, C-type elastic ring) while retracting the compression spring 236 to the rear In order to maintain the state extended outward by elastic force A locking protrusion 235a protrudes from an outer side surface of the first wedge cone member 231 and a locking protrusion 235a is seated and fixed to a rear inner side surface of the main coupling hollow coupling member 230. Precast concrete box unit connection device, characterized in that the groove (235b) is provided. 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, The 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 the tension material passage holes in the front and rear connection surfaces so as to communicate with the tension member installation holes 111 and 121, respectively. Precast concrete box units 110 and 120 are manufactured at the factory by installing and installing the first and second embedding fixed ends 210a and 210b having the 211a and 211b and the inner screw engaging surfaces 212a and 212b. To do that, 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 blocking member (115i, 115j) is disposed, and in communication with the tension member through-hole (211b) follow the hollow main anchoring anchor member 220 is formed with a tension member sliding guide hole 221 so that the tension member 300 is sliding through. It is fastened to the inner screw engaging surface 212b of the second buried fixed end 210b of the precast concrete box unit 120 to be assembled, and the first buried fixed end of the precast concrete box unit 110 previously installed ( To install the secondary coupling hollow coupling member 240 on the side 210a, and to fix the hollow main anchoring anchor member 220 in front of the secondary coupling hollow coupling member 240, The hollow main Main coupling hollow coupling member having a first wedge cone member 231 engaged with the outer circumferential surface of the fixing anchor member 220, and a conical inclined surface 232 for accommodating the first wedge cone member 231. The connection preparation step of tightening 230, Subsequent assembly of the precast concrete box unit 120 through the tension member through hole 211b of the second buried fixed end 210b and the hollow portion of the hollow main anchoring anchor member 220 A tension member insertion step of inserting the tension member 300 so that one end of the coupling member 240 may be fixed, and One end of the inserted tension member 300 is fixed in the secondary coupling hollow coupling member 240, and the tension force at the other end of the other side of the precast concrete box unit 120 is subsequently assembled while the tension device As the precast concrete box unit 120, which is subsequently assembled, is pulled toward the precast concrete box unit 110 previously installed, the hollow anchoring anchor member 220 is formed of the hollow coupling member 230 for the anchoring. Connection method of the precast concrete box unit characterized in that it comprises a step of completing the double fixing is engaged with the first wedge cone member (231). 18. The method according to claim 17, wherein the construction method for effectively injecting non-contraction mortar into the connecting portions of the culvert units connected to each other, Index block for sealing the spaces (111a and 121a) and the mortar groove (115b) between the tension member installation holes (111, 121) in which the precast concrete box unit connection device 200 is installed (inward and outward) 115i and 115j are disposed between the interconnected precast concrete box units 110 and 120 and communicated with the mortar groove 115b to be installed on one side of the precast concrete box units 110 and 120 to extend to side walls. The first mortar outlet 150a is injected into the grouting material such as the non-shrink mortar through the mortar injection hole 140, which is installed on the sidewalls of the precast concrete box units 110 and 120 in communication with the mortar groove 115b. When the grouting material is discharged through the grouting pump, pressure is injected into the grouting pump, and the bottom surface is softly installed on the upper inner surface of the upper mortar groove of the precast concrete box units 110 and 120. Connection method of the precast concrete box unit characterized in that it further comprises a grouting material injection step of performing a pressure injection until the grouting material is discharged through the mortar outlet (150). According to claim 17 or 18, After the fixing of the hollow anchoring anchor member 220 in the hollow coupling member 230 for the anchoring, is completed, As the tension member end fixing release means disposed between the first buried fixed end 210a and the auxiliary fixing hollow coupling member 240, the tension member 300 and the auxiliary fixing hollow coupling member 240 are disposed. A tension member fixing release step of releasing the engagement of the second wedge member 241 to release the tension member 300 from the auxiliary coupling hollow coupling member 240; and The tension member 300 through the tension member through hole 211b of the second buried fixed end 210b of the precast concrete box unit 120 that is subsequently assembled with the hollow portion of the hollow anchoring anchor member 220. Connection method of the precast concrete box unit characterized in that it further comprises the step of recovering the tension material to recover by passing through. 19. The method of claim 17 or 18, further comprising the step of releasing the anchorage in the anchoring anchor member 220 through the additional tension of the tension member 300 using a tension device. Connection method of precast concrete box unit. 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. A method of allowing the front and rear connection surfaces to be interconnected through the precast concrete box unit connection device 200 in the direction of the pipeline, wherein the tension member fixing free installed on the soft ground when semi-permanent or permanent auxiliary fixing using the tension material is required. In the double fixation connection construction method which connects a precast concrete box unit following a cast concrete box unit, The 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 the tension material passage holes in the front and rear connection surfaces so as to communicate with the tension member installation holes 111 and 121, respectively. The precast concrete box units 110 and 120 are manufactured at the factory by installing the first and second embedding fixed ends 210a and 210b having the 211a and 211b and the inner screw engaging surfaces 212a and 212b. Steps, 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 blocking member (115i, 115j) is disposed, and in communication with the tension member through-hole (211b) follow the hollow main anchoring anchor member 220 is formed with a tension member sliding guide hole 221 so that the tension member 300 is sliding through. It is fastened to the inner screw coupling surface 212b of the second buried fixed end 210b of the precast concrete box unit 120 to be assembled, and is constructed as a PS strand in the precast concrete box unit 110 installed in advance. Coupling and assembling the coupler 260 and the coupling member 250 for dismantling the tension member to the fixing end 270 fixing the end of the primary tension member 300, the secondary fixing hollow in the coupling end 250 for dismantling the tension member Brother couple To install the member 240 and to fix the hollow anchoring anchor member 220 to the front of the secondary coupling hollow coupling member 240, of the hollow anchoring anchor member 220 Connection preparation for fastening the main coupling hollow coupling member 230 provided therein with a first wedge-con member 231 engaged with an outer circumferential surface, and a conical inclined surface 232 accommodating the first wedge-con member 231. Steps, Subsequent assembly of the precast concrete box unit 120 through the tension member through hole 211b of the second buried fixed end 210b and the hollow portion of the hollow main anchoring anchor member 220 A tension member insertion step of inserting the tension member 300 so that one end of the coupling member 240 may be fixed, and One end of the inserted tension member 300 is fixed in the secondary coupling hollow coupling member 240, and as a reaction force while tensioning with the tension device at the other end of the precast concrete box unit 120 to be assembled later The precast concrete box unit 120 that is subsequently assembled is pulled toward the precast concrete box unit 110 installed in advance, so that the hollow anchoring anchor member 220 is disposed on the hollow coupling member 230 of the anchoring hollow coupling member 230. Connection method of the precast concrete box unit, characterized in that it comprises a step of completing the double fixing is engaged with the first wedge cone member (231). 22. The precast concrete box unit 110 according to claim 21, wherein the precast concrete box unit 110 is installed in the soft ground, and the precast concrete box unit 120 that is subsequently assembled is installed in the general ground and subsequently assembled. Method of connecting precast concrete box unit, characterized in that it comprises the step of removing the tension member 300 in the precast concrete box unit (120) subsequently assembled after the connection process of 120) is completed. 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, Precast concrete box so as to be provided with tension material through-holes (211a, 211b) formed to communicate with the tension material installation holes (131, 111, respectively) formed on both sides of the precast concrete box unit (130, 110) connected adjacently in front and rear The first and second embedding fixed ends 210a and 210b are embedded in both connection surfaces 121v and 121u of the unit 120 and are provided. A hollow anchoring anchor member 220 fastened to the second buried fixing end 210b at the rear side of the precast concrete box unit 120, Fastening arrangement on the first buried fixed end 210a so as to interlock with the hollow anchoring anchor member 220 of the precast concrete box unit 130 to be subsequently assembled on the front side of the precast concrete box unit 120. And the main coupling hollow coupling member 230, and A tension member extending rearward through the tension member through-hole 211b of the second buried fixed end 210b of the precast concrete box unit 130 and the hollow portion of the hollow anchoring anchor member 220 which are subsequently assembled ( The tension member 300 may be tensioned so that the hollow anchoring anchor member 220 and the hollow coupling coupling member 230 of the precast concrete box unit 130 are subsequently assembled. Precast concrete box unit, characterized in that it comprises a secondary coupling hollow coupling member 240 provided to fix the first buried fixed end (210a) side. The precast concrete box unit according to claim 23, wherein a PS stranded wire or a steel bar is used as the tension member (300). The hollow coupling member 240 of claim 23, wherein the auxiliary coupling hollow coupling member 240 is subsequently assembled after the tension state of the tension member 300 is released. It is installed to be removed from the precast concrete box units by being pulled forward through the hollow portion of the main anchoring anchor member 220 and the tension material passage hole 211b formed in the second buried fixed end 210b. Precast concrete box unit, characterized in that the. The method of claim 23, wherein The main coupling hollow coupling member 230 may include a first wedge cone member engaged with an outer circumferential surface of the hollow main anchoring anchor member 220 in order to engage and fix the hollow main anchoring anchor member 220. 231, and a conical inclined surface 232 for receiving the first wedge cone member 231 therein, The secondary fixing hollow coupling member 240 is a tension material passing hole 211b and the hollow main anchoring anchor of the second embedded fixing end 210b of the precast concrete box unit 130 that is subsequently assembled. The tension member 300 of the tension member 300 is fixed to the first embedding fixed end 210a side of the precast concrete box unit 110 installed in advance through the hollow portion of the member 220. A second wedge cone member 241 engaged with the outer circumferential surface, and a conical inclined surface 242 for receiving the second wedge cone member 241 therein, and The tension member end fixing part disposed between the first buried fixing end 210a and the auxiliary fixing hollow coupling member 240 to release the engagement between the tension member 300 and the second wedge cone member 241. Precast concrete box unit, characterized in that the release means is additionally provided. The tension fixing device according to claim 26, A coupling member 310 for dismantling the tension member provided to engage the rear end of the tension member 300; The tension member 300 coupled to the rear end of the tension member 300 at one end so that the tension member 300 engaged with the second wedge member 241 may be retracted together with the second wedge member 241. Tension material retracting assembly hole 252 is formed is fastened and assembled sphere 310 and the other end for dismantling the tension member formed with a screw engaging surface 253 is fastened to the inner screw engaging surface 212a of the first buried fixed end (210a) Coupling stage 250, and The tension member 300 and the second wedge cone member are screwed to the tension member retracting assembly hole 252 of the tension member dismantling coupling end 250 engaged with the end of the tension member 300. When the 241 retreats backward in the secondary coupling hollow coupling member 240, the frictional engagement between the tension member 300 and the second wedge cone member 241 is released, thereby providing the tension member 300. A second wedge cone extension elastic ring 244 (C-type elastic ring) installed in the second wedge cone member 241 to extend the second wedge cone member 241 to the outside so as to be removed to the outside. Precast concrete box unit, characterized in that comprises a. The method of claim 27, PS strand is used as the tension member 300, and the precast concrete box unit is provided with a polygonal nut groove to be fitted to the rear end portion of the secondary tension member 300 to engage the tension member disassembly 310. . The method according to any one of claims 26 to 28, An elastic spring 236 disposed behind the first wedge-con member 231, and In order to release the frictional engagement between the hollow main anchoring anchor member 220 and the first wedge cone member 231, the first wedge cone member 231 is extended to extend outwardly. Precast concrete box unit, characterized in that it further comprises a first wedge cone expansion elastic ring (234, C-type elastic ring) installed in the 231. 30. The precast concrete box unit according to claim 29, wherein a spring washer (237) is disposed between the first wedge cone member (231) and the elastic spring (236). 30. The method of claim 29, wherein the first wedge cone member 231 can be retracted on the rear inner surface of the main coupling hollow coupling member 230 to facilitate the outer expansion of the first wedge cone member 231 Precast concrete box unit, characterized in that the clearance is provided close to the direct wall to secure the space. 32. The method of claim 31, wherein the locking projection 235a protrudes from an outer surface of the first wedge cone member 231 so that the first wedge cone member 231 retreats and maintains an extended outward position. And precast concrete box unit, characterized in that the locking groove (235b) is provided on the rear inner surface of the main coupling hollow coupling member 230 is fixed to the locking projection (235a).

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