JP2003313930A - Assembling method for division type box culvert and tension member jointing jig to be used for the assembly - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an assembly method for the division type box culvert offering easy and safe assembly and jointing jigs for the tension members for the assembly. <P>SOLUTION: A box culvert is formed by dividing it to two portions; a lower half body 2 having upward side walls 2b and 2b above both the sides of a bottom slab 2a, and an upper half body 3 having downward side walls 3b and 3b below both the sides of the top slabs 3a; a PC tension member 8 at the upper half body side is inserted in advance to a PC tension member insertion hole 7 of the upper half body, its upper end is suspended through a tension member jig 13 near an opening portion of the upper end of the PC tension member, in this state, the upper half body 3 is moved to the top of the lower half body 2, a working space 21 for PC tension member jointing work is installed with the space 21 opened by interposing spacers, jointing work for PC tension member at the upper and lower halves side is performed in the work space 21 for jointing PC tension members, thereafter, wall gap at each side of the upper and lower halves sides is jointed, and the upper and lower halves 2 and 3 are united together by tensioning and anchoring the upper ends of the PC tension member 8 at the upper halves side on the upper half body thereby uniting the upper and lower halves 2 and 3 into one united body. <P>COPYRIGHT: (C)2004,JPO

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method of assembling a split-type box culvert mainly used for constructing an underdrain for sewers and the like, and a tension member connecting jig used for the assembly.

[0002]

2. Description of the Related Art Conventionally, in the construction of underdrain such as sewers, a box culvert such as a horseshoe type with an arched top or a rectangular type with a rectangular cross section is divided into upper and lower parts. The halves are manufactured in advance in factories, etc., and the upper and lower halves are assembled and integrated at the construction site,
A tubular box culvert consisting of a bottom slab and both side walls is used, and a construction method is used to build by connecting the box culverts.By using this split type box culvert, the box culvert is made of concrete. Compared to the case of forming by casting, the process at the construction site can be reduced and the construction period is shortened.

Known methods for integrating the upper and lower box culvert halves include bolt joining using bolts and PC joining using PC tension members.
In the case of a large box culvert, it is common to use PC tendons to integrate them in consideration of strength, etc.
For example, as shown in FIG. 9, a box culvert 1 is used in a factory to form a lower half 2 having upward side walls 2b and 2b on both sides of a bottom plate 2a and downward side walls 3b and 3b to both sides of a top plate 3a.
It is divided into an upper half 3 having 3b. Then, at the installation site, the lower end surfaces of both side walls of the upper half body 3 are opposed to the upper end surfaces of both side walls of the lower half body 2, and the lower half body side PC tension members 4 installed on the respective side walls 2b, 2b of the lower half body 2. The upper half side PC inserted into the PC tension material insertion holes 7, 7 ... on each side wall of the upper half body at the upper end
The tension member 8 is connected via the connecting tool 6, the upper half PC tension member 8 is tensioned from above the upper half body, and the end portion 8b is fixed to the PC tension member insertion hole 7 by the PC tension member fixing. The fixing member 5 (anchor plate 5a, washer 5b, nut 5c) is fixed in the tool setting concave portion 11 to be integrated.

The assembly of such a split type box culvert is generally performed by one of the following methods.

The first method is as shown in FIG.
The upper half PC tension member 8 is connected to the lower half PC tension member 4 in advance via the connecting tool 6 to form the box culvert lower half 2
The upper half PC tension member 8 is erected on the side wall end face of the side wall 2b, and the box culvert upper half body 3 is inserted into the upper half PC tension member 8 erected on the side wall 2b. It moves so as to be inserted into the hole 7 and is hung down, the side wall end faces of both halves 2 and 3 are joined, and then the upper half PC
The tension member 8 is tensioned to be integrated.

The second method is as shown in FIG.
The upper half culvert 3 of the box culvert is moved and hung down on the lower half culvert 2 of the box culvert having the spacers 9, 9 ... Installed on the end faces of the side walls 2b, and a PC tension member connecting work gap 10 is opened between the end faces of the side walls 2b and 3b. State, and in this state, the upper half side P from the upper surface of the box culvert upper half 3
The C-tension material 8 is inserted into the PC-tension material insertion hole 7, and the upper half-body side P protruding from the side wall end face in the PC-tension material connection work gap 10
The end portion of the C tension member 8 is connected to the connecting tool 6, and when the connection is completed, the spacer 9 is removed and the upper half 3 of the box culvert is suspended to join the side wall end faces of both half bodies 2 and 3, and then, The upper PC tension member 8 is tensioned to be integrated.

In the third method, as shown in FIG. 12, first, the box culvert upper half body 3 is moved onto and suspended from the box culvert lower half body 2, and both half bodies 2, 3 are hung.
The side wall end faces of the box culvert are joined, and in that state, the upper half PC tension member 8 is inserted into the PC tension member insertion hole 7 from the upper surface of the box culvert upper half body 3, and the end of the upper half PC tension member 8 is touched by hand. Alternatively, the lower end 8a is connected to the connector 6 by operating a jig such as a handle, and after the connection is completed, the upper half PC tension member 8 is tensioned to be integrated. .

[0008]

However, in the above-mentioned first method, the standing upper half PC tension member 8 does not always stand upright from the side wall 2a.
When joining the box culvert lower half body 2 and the box culvert upper half body 3, it is dangerous that a worker manually guides the upper half body side PC tension member 8 to be inserted into the PC tension member insertion hole 7. There is a problem that a scaffold is required to perform the work and to guide the work, and work efficiency is lowered by the work of installing and removing the scaffold.

In the second method described above, the upper half P
The work of inserting the C-tension material 8 into the PC-tension material insertion hole 7 is performed manually by an operator on the upper surface of the upper half body 3 of the box culvert. In such a case, the upper half body 3 of the box culvert is hung on a crane or the like. There is a problem that it is dangerous because it is still in an unstable state. Also, since the inner diameter of the PC tensioning material insertion hole is larger than the diameter of the PC tensioning material on the upper half side, the PC tensioning material on the upper half side PC tensioning member 8 is in tension. There is also a problem that it is difficult to connect with the connector 6 because it is obliquely inserted into the material insertion hole, that is, it is difficult to insert the male screw portion of the upper half PC side tension member lower end 8a straight into the screw hole 6a of the connector 6. is there.

In the third method, it is not possible to visually check the connection state between the upper half PC side tension member 8 and the connecting tool 6, so that there is a problem in safety, and like the second method,
Since the inner diameter of the PC tension material insertion hole is larger than the diameter of the upper half PC tension material, the upper half PC tension material 8 is obliquely inserted into the PC tension material insertion hole, and it is difficult to connect with the connector 6. That is, with respect to the screw hole 6a of the connector 6, the upper half PC
There is also a problem that the male screw portion of the tension member lower end 8a is difficult to be inserted straight.

In view of the above problems of the prior art, it is an object of the present invention to provide a method for assembling a split-type box culvert that can be safely and easily assembled, and a tension member connecting jig used for the assembly. To do.

[0012]

The invention of claim 1 for solving the above-mentioned conventional problems and achieving the intended purpose is a box culvert comprising a bottom plate, a top plate and both side walls, The lower half body having upward side walls on both sides and the upper half body having downward side walls on both sides of the top plate are divided and molded, and the upper half is formed on the upper end surfaces of both side walls of the lower half body. Upper half sides of the lower half body side PC tension members installed on the side walls of the lower half body are inserted into the PC tension material insertion holes of the side walls of the upper half body with the lower end surfaces of both side walls of the body facing each other. In a method for assembling a split box culvert in which PC tension members are connected to each other and the upper and lower halves are integrated by tensioning the PC tension members on the upper half side, the PC tension members of the upper half body are inserted. Insert the upper half PC tension member into the hole in advance and place the upper end in front It is hung and held near the upper end opening of the PC tension material insertion hole via a tension material connecting jig, and in this state, the upper half body is moved onto the lower half body, and is placed on the side wall of the lower half body. The side wall of the half body is installed in a state in which the PC tension member connection work gap is opened, and the connection work of both the upper and lower half PC side tension members is performed in the PC tension material connection work gap, and then the upper and lower half body sides are connected. It is characterized in that the side walls are joined to each other, and the upper end of the PC half member on the upper half body is tensioned and fixed on the upper half body.

With this structure, dangerous work is reduced to improve safety in assembling the split-type box culvert, and the upper half PC tension member and the connecting tool are easily connected. The work efficiency can be improved.

According to a second aspect of the present invention, in the first aspect of the present invention, the upper half of the PC tension member on the upper half side is screwed into the tension member connecting jig, and the upper PC tension member is tensioned. By rotating it in the direction to get out of the material connecting jig, the lower end is screwed into the connecting tool provided on the upper end of the PC half member on the lower half body side, so that it remains in the state regulated by the tensile material connecting jig. It is possible to perform the connecting work of the upper half body side PC tension member to the connecting tool, and, at the same time as the connecting work between the upper half body side PC tension member and the connecting tool, from the tension material connecting jig to the upper half body side P.
Since the work for removing the C-tension material is performed, the work is efficient, and the connection work between the upper-half PC-side tension material and the connector can be suitably performed.

According to a third aspect of the present invention, in any one of the first or second aspects of the present invention, a recess for installing a fixing tool is formed in the peripheral edge of the upper end of the PC tension member insertion hole on the upper surface of the upper half body. The material connecting jig is inserted into the recess in a state of being prevented from rotating, and the upper half PC tension member is suspended and held, so that the upper half PC tension member is preferably held in the box culvert upper half body. In addition, it is possible to suitably connect the upper-half PC tension member and the connecting tool with a screw.

According to a fourth aspect of the present invention, in any one of the first to third aspects of the present invention, the tension member connecting jig includes an upper half body side P.
The lower end extended arrangement of the female threaded hole into which the upper end of the C tension member is screwed is provided with a guide hole in which the upper end of the upper half PC side tension member is axially movable while the horizontal movement is restricted.
Since the upper end of the upper half PC tension member is pulled out from the female screw hole and guided by the guide hole, the upper half PC tension member is screwed into the connecting tool at the upper end of the lower half PC tension member, so that the screwing is performed. Even if the upper half PC tension member comes out of the female screw hole and is guided by the guide hole, the verticality of the upper half PC tension member is maintained, and the upper half PC tension member and the connecting tool are connected. The connecting work can be suitably performed.

According to a fifth aspect of the present invention, there is provided a box culvert comprising a bottom plate, a top plate and both side walls, a lower half body having upward side walls on both sides of the bottom plate, and an upper side wall having downward side walls on both sides of the top plate. A lower half PC installed on each side wall of the lower half so that the upper half of both side walls of the lower half is opposed to the upper end of both side walls of the lower half and is molded separately. The upper half of the tension member is connected to the upper PC tension member inserted through the PC tension member insertion holes of the side walls of the upper half body, and the upper and lower PC tension members are tightened from above the upper half body so that the upper and lower parts are vertically moved. A tension material connecting jig used for assembling a split type box culvert for integrating half bodies, wherein a female screw portion to which the upper end of the upper half body PC tension material is screwed and a PC of the upper half body It should be fitted in the tension material fixing tool accommodating recess formed at the upper end position of the tension material insertion hole. The PC tension member is integrally formed with a rotation stopper portion that is locked by the upper half body, and the upper half of the PC tension member is screwed at its upper end into the female screw hole and is inserted into the PC tension member insertion hole. It is characterized in that it is suspended and held at the upper end of the material insertion hole.

With this configuration, the upper half PC
The tension member can be preferably held in the upper half of the box culvert, and the upper half PC tension member can be easily connected to the connecting tool by rotating the upper half PC tension member in the exit direction. be able to.

According to a sixth aspect of the present invention, in the fifth aspect of the present invention, there is provided a whirl-stop portion having a rectangular plate shape that matches the planar shape of the tension member fixing tool installation recess, and a central portion of the whirl-stop portion. By integrally providing a columnar main body portion having a female threaded hole into which a PC tension member is screwed in the center of the lower surface, and the lower end side of the main body portion is inserted into the PC tension material insertion hole, Since the box culvert upper half body can hold the upper half body side PC tension member in a vertically regulated state and has a rotation stop, the upper half body side PC is suitable.
It is possible to rotate the tension member in the exit direction.

According to a seventh aspect of the invention, in the fifth or sixth aspect of the invention, the upper end of the upper half PC tension member is axially movable to the lower end of the main body while the horizontal movement is restricted. By providing the guide hole, even if the upper half body side PC tension member comes out of the screw hole, it is guided by the guide hole, and the movement is restricted in the horizontal direction, so that the upper half body side PC tension member and the connecting tool are suitably connected. It can be performed.

[0021]

BEST MODE FOR CARRYING OUT THE INVENTION Next, an embodiment of the present invention will be described with reference to the drawings. The same parts as those in the above-mentioned conventional example are designated by the same reference numerals, and the duplicated description will be omitted.

FIG. 1 shows an outline of the assembly of the split type box culvert. Reference numeral 1 is the split type box culvert.

The split type box culvert 1 is constructed in the same manner as the conventional example shown in FIG. 9, and the upper and lower halves 2 and 3 which are divided into upper and lower parts are integrated to form a cylinder consisting of a bottom plate, a top plate and both side walls. Box culverts are formed.

The lower half 2 of the box culvert has a flat plate-shaped bottom plate 2a and side walls 2b and 2b provided on both sides of the bottom plate 2a so as to face upward, and the bottom plate 2a and the side walls 2b and 2b are U-shaped in cross section. It is integrally formed of concrete so as to have a shape.

On the side wall 2b, the lower end 4a is fixed to the fixing member 5.
A lower half PC tension member 4 fixed to the lower half 2 of the box culvert and having an upper end 4b connected to a connecting tool 6 is installed.

As the connecting tool 6, a tubular one having a screw hole 6a at the center thereof such as a coupler is used, and a bolt-shaped end portion (male screw) is provided at a screw hole (female screw) 6a provided on the inner circumference. It is possible to connect by screwing. Before connecting the two halves 2 and 3, the connecting tool 6 is connected to the lower half PC tension member 4 at the lower end, and the upper end face is substantially flush with the side wall end face of the side wall 2b. It is embedded so that

The box culvert upper half 3 has a flat plate-shaped top plate 3a and side walls 3b and 3b provided downward on both sides of the top plate 3a. The top plate 3a and the side walls 3b and 3b are composed of the top plate 3a and the side walls 3b and 3b. It is integrally formed of concrete so that it has a U-shaped cross section.

The side wall 3b has a P penetrating vertically.
C tension material insertion holes 7, 7 ... Are formed, and a fixing tool installation recess 11 for fixing the fixing member 5 is formed at the upper end of the PC tension material insertion hole 7, and a PC is provided at the lower end. An escape recess 12 is formed so that the connector 6 can escape when the tension member 8 is tensioned. The inner diameter of the PC tension material insertion hole 7 is larger than the diameter of the upper half PC tension material 8 to be inserted, and the shape of the fixing tool installation recess 11 is a tapered quadrangular prism shape expanded upward. ing.

The box culvert upper half 3 is preliminarily provided with an upper half PC tension member 8 as shown by a chain double-dashed line in FIG.
Is inserted into the PC tension material insertion hole 7, and its upper end is suspended and held near the upper end opening of the PC tension material insertion hole 7 via a tension material connection jig 13.

As shown in FIG. 3, the tension member connecting jig 13 includes a main body portion 15 having a female screw portion 14 with which the upper end of the upper half PC tension member is screwed, and a tension member fixing tool accommodating recess. 1
It is integrally provided with a detent portion 16 which is detented by being fitted into the inside 1.

The main body 15 is made of a steel columnar material and has a female screw hole 14a opened at the center of the lower surface.
The outer shape of the columnar member is substantially the same as or slightly smaller than the inner diameter of the PC tension material insertion hole 7, and the lower end portion is inserted into the PC tension material insertion hole 7 and fitted therein.

At the lower end of the main body, the inner diameter is 1
A guide hole 17 having a diameter substantially equal to or larger than the diameter of the valley of 4a is provided integrally with the female screw hole 14a.

Reference numeral 18 in the drawing denotes an eyebolt, and a hook or the like can be hung by hooking a hook or the like on the eyebolt 18.

The female screw hole 14a is threaded to a depth of about 10 to 20 mm and, as shown in FIG. 4, between the bolt-shaped screw portion 8b at the end of the PC half member 8 on the upper half side. A clearance is provided between the top and the bottom and between the opposing slopes.

A rotation stopping portion 16 is integrally or integrally provided on the peripheral edge of the main body portion 15.

As shown in FIG. 5, the anti-rotation portion 16 is formed in a quadrangle in conformity with the planar shape of the fixing tool installation recess 11, and its outer shape is slightly smaller than the internal shape of the fixing tool installation recess 11. There is a small gap (about 2 mm) between the outer edge of the rotation stopper and the inner surface of the fixing tool installation recess. With this configuration, even if the main body portion 15 tries to rotate by using the PC tension member insertion hole 7 as a bearing, the rotation preventing portion 16
The outer edge hits the inner surface of the fixing tool installation recess 11 to prevent rotation.

As shown in FIG. 3, the whirl-stop portion 16 has a cylindrical retaining portion 19, and one end thereof has the whirl-stop portion 16.
Is welded to and integrated with the lower surface of the. The height h of the retaining portion 19 is determined from the lower end surface of the retaining portion 19 to the main body portion 1.
The height of the lower end of the protrusion 5 is set to a value that protrudes.

The retaining portion 19 has, in addition to the cylindrical shape,
As shown in FIG. 7, it may be formed in a rectangular or other polygonal rectangular tube shape.

As shown in FIG. 6, in this tensioning member connecting jig 13, the end surface of the retaining portion 19 is inserted with the PC tensioning member inserted while the lower end of the main body 15 is fitted in the PC tensioning member insertion hole 7. The detent is brought into contact with the periphery of the opening of the hole to prevent the detent, and the detent 16 is fitted into the fixing tool installation recess 11 to detent the detent. Therefore, the upper half PC tension member 8 screwed to the body portion 15 can be suspended and held substantially vertically by inserting the lower end portion of the body portion 15 into the PC tension member insertion hole 7. Also, since the tensioning member connecting jig 13 is prevented from rotating, it is preferable to rotate the upper half body side PC tensioning member 8 in the withdrawing direction so that the upper half body side PC tensioning member end is preferably bolted from the main body portion 15. The part 8b can be removed. Moreover, by the guide hole 17,
Even after the end of the upper half PC tension member 8 has slipped out of the female screw portion 14, the horizontal movement is restricted, so the upper half PC
The uprightness of the tension member 8 is maintained.

As described above, in the method of assembling the split type box culvert, the upper half body PC tension member 8 is inserted into the PC tension member insertion hole 7 in advance in the box culvert upper half body 3 and the upper end thereof is connected to the PC tension member PC. It is hung and held near the upper end opening of the tension material insertion hole 7 via a tension material connection jig 13.

Next, the spacers 20, 20, ... Are placed on the side wall end faces of the side walls 2b, 2b of the box culvert lower half body 2, and the box culvert upper half body 3 is hung and moved by a crane or the like to move the spacer 21 above the spacer 21. Hang it on. That is, the box culvert upper half body 3 is installed on the box culvert lower half body 2 in a state in which the PC tension member connecting work gap 21 is opened between the side wall end faces of the upper and lower box culvert halves 2 and 3 via the spacer 21. .

In this case, the box culvert upper half 3
After being placed on the lower half body 2 of the box culvert via the spacer 21, it is still hung on a crane or the like.

In this state, the PC tension member connecting work gap 21
Then, as shown in FIG. 8, the connecting work of the connecting tool 6 and the upper half body side PC tension member 8 is performed. When the upper half PC tension member 8 is rotated in the direction of coming out of the screw hole 14a, that is, the descending direction by using a hand or a jig, the upper end portion 8 of the upper half PC tension member 8 is rotated.
b is paid out from the tension member connecting jig 13, and the lower end 8a
Comes close to the connecting tool 6 and is screwed.

At this time, the upper half PC tension member 8 is regulated by the tension member connecting jig 13 and is in a suspended state, so that it can be preferably connected to the connecting tool 6. That is, the lower end portion 8a of the upper half PC-side tension member is inserted straight into the screw hole 6a of the connecting tool 6 so that it can be suitably screwed.

Further, the female screw hole 14a of the jig body 15
Since the clearances are provided between the top and bottom of the PC tension member 8 and the screw portion 8b of the PC tension member 8 and between the inclined portions facing each other, the entrance angle of the upper half PC tension member 8 with respect to the connector 6 can be freely set. The connector 6 and the upper half body side PC tension member 8 can be suitably screwed even if an angle in the central axis direction is slightly generated.

Thus, when the connection between the connecting tool 6 and the upper half PC tension member 8 is completed, the spacers 20 and 20 are removed, and the box culvert upper half 3 is hung to end the upper and lower half halves 2 and 3. Join each other.

Next, on the upper half, the tension member connecting jig 1 is used.
3, the fixing member 5 including the anchor plate 5a, the washer 5b, and the nut 5c is attached to the end 8b of the upper half PC tension member, and the tension jack is set in the fixing tool setting recess 11. Then, a predetermined tension force is applied by the tension jack, and the nuts are tightened and fixed in a state where the PC tension member is extended, so that the upper and lower box culvert halves 2 and 3 are integrated.

Finally, grout is injected into the space formed between the PC tension member insertion hole 7 and the upper half PC tension member 8 to complete the assembly of the split box culvert 1. Then, by connecting the split-type box culverts, a culvert such as a sewer is constructed.

[0049]

As described above, the method of assembling the split-type box culvert according to the present invention eliminates dangerous work such as working on the upper half body of the box culvert in an unstable state, and assembling Safety in
The connection between the upper half body PC tension member and the connecting tool can be suitably and easily performed, and the work efficiency is improved.

Further, by using the tension member connecting jig according to the present invention, the upper half PC tension member can be preferably held in the box culvert upper half member, and further, the upper half PC tension member can be held. Is regulated so as to be inserted straight with respect to the connector, and the connection with the connector can be facilitated.

[Brief description of drawings]

FIG. 1 is a side view showing an outline of a split type box culvert assembly according to the present invention.

FIG. 2 is a front view of the above.

FIG. 3 is a vertical cross-sectional view showing a tension member connecting jig of a split type box culvert according to the present invention.

FIG. 4 is a partially enlarged cross-sectional view showing a connected state of the female threaded hole in the main body portion and the upper half body side PC tension member of the same.

FIG. 5 is a plan view showing a mounting state of the above-mentioned tensioning material connecting jig.

FIG. 6 is a vertical sectional view of the above.

FIG. 7 is a plan view showing another embodiment of the above-mentioned tensioning member connecting jig.

FIG. 8 is a vertical cross-sectional view showing a state of a working space.

FIG. 9 is a vertical cross-sectional view showing a joined state of a conventional split type box culvert.

10A is a front view showing the outline of a first assembling method of a conventional split type box culvert, and FIG. 10B is a side view of the same.

FIG. 11A is a front view schematically showing a second assembling method of a conventional split type box culvert, and FIG. 11B is a side view of the same.

FIG. 12A is a front view schematically showing a third assembling method of the conventional split type box culvert, and FIG. 12B is a side view of the same.

[Explanation of symbols]

13 Jig for connecting tension material 14 Female thread 14a Female screw hole 15 Main body 16 Detent 17 Guide hole 18 eyebolts 19 retaining part 20 spacers 21 PC tension material connection work gap

   ─────────────────────────────────────────────────── ─── Continued front page    (72) Inventor Haruhiko Tada             936-4 Sano Ushinzan, Yachiyo-cho, Yuki-gun, Ibaraki Prefecture               Kumagaya Iron Works Tsukuba Factory F-term (reference) 2D063 BA06 BA08 BA23 BA25 BA32

Claims (7)

[Claims] 1. A box culvert consisting of a bottom plate, a top plate and both side walls is divided into a lower half body having upward side walls on both sides of the bottom plate and an upper half body having downward side walls on both sides of the top plate. Then, lower end surfaces of both side walls of the upper half body are opposed to upper end surfaces of both side walls of the lower half body, and are attached to upper ends of the lower half body side PC tension members installed on each side wall of the lower half body. , The upper half side PCs inserted through the PC tension material insertion holes in each side wall of the upper half body
In a method for assembling a split type box culvert in which tension members are connected to each other and the upper and lower halves of the PC tension member are tensioned from above the upper half body, a PC tension member insertion hole for the upper half body is provided. In advance, the upper half body side PC tension member is inserted therethrough, and the upper end thereof is suspended and held near the upper end opening of the PC tension material insertion hole via a tension material connecting jig, and in this state, the upper half body is held. Is moved to the lower half body, the side wall of the upper half body is installed on the side wall of the lower half body in a state in which the PC tension member connection work gap is opened, and the upper and lower halves side in the PC tension material connection work gap. The division is characterized in that the connecting work of both PC tension members is performed, then the side walls on the upper and lower halves are joined, and the upper end of the PC tension member on the upper half body is tensioned and fixed on the upper half body. Assembling method of mold box culvert. 2. An upper half of the PC tension member on the upper half side is screwed to a jig for connecting the tension member, and the PC tension member on the upper half side is rotated in a direction of coming out of the tension member connecting jig. The method for assembling a split-type box culvert according to claim 1, wherein the lower end is screwed to a connecting tool provided on the upper end of the lower half PC tension member. 3. A recess for installing a fixing member is formed in the peripheral edge of the upper end of the PC tension material insertion hole on the upper surface of the upper half body, and the tension material connecting jig is inserted into the recess while being prevented from rotating. Then, the method for assembling the split-type box culvert according to claim 1 or 2, wherein the upper half PC tension member is suspended and held. 4. The tension member connecting jig is arranged so that the upper end of the upper PC half member is screwed into the female screw hole so that the upper end of the upper PC tension member moves horizontally. Is provided with a guide hole that is movable in the axial direction in a restricted state, and the upper end of the upper half PC tension member comes out of the female screw hole and is guided by the guide hole. The method for assembling the split box culvert according to claim 2 or 3, wherein the method is screwed into the connector. 5. A box culvert consisting of a bottom plate, a top plate and both side walls is divided into a lower half body having upward side walls on both sides of the bottom plate and an upper half body having downward side walls on both sides of the top plate. Then, lower end surfaces of both side walls of the upper half body are opposed to upper end surfaces of both side walls of the lower half body, and are attached to upper ends of the lower half body side PC tension members installed on each side wall of the lower half body. , The upper half side PCs inserted through the PC tension material insertion holes in each side wall of the upper half body
A tension material connecting jig used for assembling a split type box culvert in which upper and lower halves are integrated by connecting the tension material and tensioning the upper half PC tension material from above the upper half body, By fitting the female threaded portion to which the upper end of the upper half body PC tension member is screwed, and the tension member fixing tool accommodating recess formed at the upper end position of the PC tension material insertion hole of the upper half body The PC tension member is integrally provided with a rotation stopper portion to be prevented from rotating, and the upper half PC tension member is screwed at its upper end to the female screw portion and inserted into the PC tension member insertion hole. A tension material connecting jig used for assembling a split box culvert that is suspended and held at the upper end of the insertion hole. 6. A rotation stopper having a rectangular plate shape matching the plane shape of the recess for installing the tension member fixing tool is provided, and a PC tension material is screwed into the center of the rotation stopper at the center of the lower surface. Equipped integrally with a columnar main body with female screw holes opened,
The tension material connecting jig used for assembling the split type box culvert according to claim 5, wherein the lower end side of the main body is inserted into the PC tension material insertion hole. 7. The guide hole according to claim 5, wherein the lower end of the main body portion is provided with a guide hole that is movable in the axial direction in a state where the upper end of the upper half-body side PC tension member is restricted from moving in the horizontal direction. Jig for connecting tension material used for assembly of split box culvert.