JP3273775B1 - How to connect precast concrete basement units - Google Patents

Abstract

An object of the present invention is to allow an upper unit to be easily and reliably adhered to a wall surface of an existing building via a seal member when stacking the upper unit on the lower unit. SOLUTION: An outer side surface of a second annular ridge 322 on the opposite side to the basement unit 10a is brought into contact with an inner side surface of the first annular ridge 262, so that the rear upper unit 30b.
Is obliquely suspended, and the rear upper unit 30b is suspended so that the outer surface of the second annular ridge 322 on the pre-installed basement unit 10a side of the rear upper unit 30b faces the inner surface of the first ridge. The rear upper unit 30b is stacked on the rear lower unit 20b, and the rear upper unit 30b is connected to the pre-installed basement unit 10a by operating the jack device 40.
Move in the direction of.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

The present invention relates is the lower unit made precast concrete, to a consolidation process units vertically in the precast concrete basement unit formed by stacking upper unit made precast concrete.

[0002]

2. Description of the Related Art In recent years, three-story buildings and basements have been actively installed in wooden buildings in order to make effective use of land as a result of deregulation of laws and regulations. Conventionally, in the basement, so-called cast-in-place concrete has been the mainstream, in which a vertical hole is dug in the site, reinforcing bars are laid, the frame is constructed, and then ready-mixed concrete is poured into the frame. A so-called precast concrete unit, which is a box made of reinforced concrete that covers the area, is mass-produced at a factory, and the concrete unit is carried to a construction site, and is suspended in a vertical hole dug in advance to form a basement. The unit construction method is disclosed in, for example, Japanese Patent No. 294, which was filed and filed by the applicant earlier.
No. 4565 and the like.

According to such a unit construction method, the construction cost can be reduced at a low cost as compared with the conventional on-site construction, and the construction period can be greatly shortened. It is in the spotlight as a thing. If the concrete unit is used as a building on the first floor, a three-story building can be easily obtained by constructing a two-story building thereon.

[0004] Such a concrete unit is manufactured separately from a lower unit and an upper unit for convenience of transportation, and after these upper and lower units are carried from a factory to a construction site, the lower unit is first moved to a predetermined position. Hanging is performed on a foundation, followed by hanging the upper unit on the lower unit.

[0005] When two concrete units are connected to each other and two basement rooms are provided, a second concrete unit is placed next to the concrete unit that has been first dropped and the opposing walls are in close contact with each other via a sealing member. The concrete unit is very heavy with a weight of 5 to 10 tons per unit, so the second concrete unit is connected to the existing concrete unit via a sealing member. It is very difficult to hang down without gaps.

Therefore, in the method described in the above-mentioned Japanese Patent No. 2944565, a fitting groove is formed in a foundation board installed adjacent to an existing concrete unit in parallel with the outer wall surface of the concrete unit. Along with
A fitting body is provided at the bottom of the second lower unit so as to be fitted in sliding contact with the fitting groove.

The fitting groove has a groove-side inclined surface parallel to the extending direction of the fitting groove and inclined from the upper edge opposite to the outer wall surface of the first concrete unit toward the groove bottom. On the other hand, the fitting body is provided with a fitting body-side inclined surface having the same inclination angle corresponding to the groove-side inclined surface. Therefore, by lowering the lower unit on the base board so that the fitting body fits into the fitting groove, the lower unit is guided by each of the inclined surfaces and moves in the direction of the existing concrete unit, and the fitting body fits. The lower unit comes into close contact with the existing concrete unit via the seal member in a state where the lower unit is completely fitted in the mating groove.

[0008]

By adopting such a structure adjacent to the concrete unit, a reliable connection of the lower unit to the existing concrete unit can be realized, but the lower unit and the upper unit have the above-mentioned inclined surfaces. Therefore, when stacking the upper unit on the lower unit, there is a problem that it is extremely difficult to bring the stacked upper unit into close contact with the existing concrete unit.

By the way, the applicant has previously described Japanese Patent Application Laid-Open
A method of mounting an upper unit on a lower unit as described in JP-A-213171 is proposed. In this installation method, at least two variable length rods are installed for each opposed inner wall surface in the lower unit previously laid, and at the time of this installation, each variable length rod is connected between the opposed inner wall surfaces of the upper unit. The length is adjusted to be slightly shorter than the distance, and the contact plates provided at both ends of each variable length rod are projected slightly above the upper edge of the lower unit.

[0010] By disposing such a variable length rod,
The upper unit is hung on the lower unit and put on the variable length rod. In this state, the variable length rod is extended and the abutting plate at the tip of the rod is separated from the inner wall surface of the upper unit to lower the upper unit. The upper unit can be hung on the lower unit while the misalignment between the edge and the upper edge of the lower unit is corrected.

However, this method of installing the upper unit is based on the premise that the concrete unit is constructed in a single state without the existing concrete unit, and the existence of the existing concrete unit is not planned. Therefore, even if this method is applied when an existing concrete unit already exists, suspend the upper unit so that it does not interfere with the existing concrete unit and so as to cover the variable length rod. Has the problem that it is very difficult.

SUMMARY OF THE INVENTION The present invention has been made to solve the above-described problems. When stacking an upper unit on a lower unit, the upper unit is attached to a wall surface of an existing building via a sealing member. easily and precast concrete basement unit may reliably brought into close contact
And its object is to provide a consolidated method.

[0013]

According to the first aspect of the present invention,
A lower unit made of precast concrete having a bottom and a peripheral wall, and a precast that has the same shape as the lower unit in plan view and is stacked on the lower unit such that an upper edge surface and a lower edge surface abut against each other. Conch
An upper unit made of REIT, and the lower unit has an installation position set such that a surface facing an outer wall surface of an adjacent building abuts on an outer wall surface of the building, and an upper edge of the lower unit is provided. The surface is provided with a first annular ridge projecting upward over the entire circumference on the outer wall side, while the lower edge surface of the upper unit is provided on the entire circumference on the inner wall side. A second annular ridge protruding downward is provided, and the first and second annular ridges have an inner peripheral surface of the first annular ridge and an outer peripheral surface of the second annular ridge. Of a precast concrete basement unit whose thickness is set so that a gap is formed between the seal members
Using a connection structure, the upper unit is connected to the lower unit
Stacking them so that they adhere to the outer wall of the adjacent building
Precast concrete basement unit for construction
The lower part installed on the base plate
When stacking the upper unit on top of the unit,
The outer surface of the second annular ridge on the opposite side of the building
The upper unit must be in contact with the inner surface of the first annular ridge.
The unit is suspended diagonally, and the construction of the upper unit continues.
The outer surface of the second annular ridge on the object side is the inner surface of the first annular ridge.
Hang the upper unit so that it faces the
Knitting more than normal position matching lower unit
So that it can be stacked on the lower unit while being separated from
And then a second annular ridge on the building side of the upper unit
Between the lower unit and the upper edge of the opposite side wall
The upper unit is operated by the operation of the jack device
Build the upper unit to the proper position that matches the lower unit.
Pleki characterized by moving in the direction of the structure
The method of connecting the basement units made of Just Concrete
You.

[0014]

According to the invention of claim 1 Symbol mounting, upon which stacking the upper unit to the lower unit, in a state which is interposed a seal member therebetween and between the upper and lower units, the far side of the upper unit from the building While lowering the upper unit diagonally so that the lower edge is at the lowest level, and suspending the lower unit on the lower unit so that the lower edge of the building side is along the facing surface of the building.

Then, the lower end of the upper unit comes into contact with the upper edge of the lower unit while the outer surface of the second annular ridge of the upper unit faces the inner surface of the first annular ridge of the lower unit. In this state, the edge of the upper unit on the building side is lowered. In this way, the upper unit rotates, with the lower end of the second annular ridge far from the building as a fulcrum, and the second annular ridge near the building fits inside the first annular ridge. This causes the upper unit to be stacked on the lower unit.

Next, a jack device is interposed between the second annular ridge on the building side of the upper unit and the first annular ridge on the side opposite to the building of the lower unit. The upper unit moves toward the building and compresses the seal member interposed between the building and the upper unit, whereby the upper unit adheres to the building. It is piled up on the lower unit in the state.

When the upper unit is suspended, the second annular ridge of the upper unit is formed on the inner wall surface side, so that it is fitted to the first annular ridge formed on the outer wall surface side of the lower unit. Not only can the positioning at the time of alignment be easily performed while being visually confirmed, but also the upper unit when fitted does not move in the direction away from the building, so that the initial positioning of the upper unit is reliably performed.

On the other hand, in the case of the conventional edge joining structure in which the annular ridge of the upper unit is formed on the outer wall surface side and the annular ridge of the lower unit is formed on the inner wall surface side, Not only is it difficult to visually check the fitting, but also because the upper unit can slide in a direction away from the building while being obliquely fitted to the lower unit, it is difficult to perform reliable positioning. Although there are disadvantages, such disadvantages do not occur in the present invention.

Therefore, the conventional inconvenience that rainwater, groundwater, and the like intrude into the underground room from the junction of the two due to insufficient close contact of the upper unit with the building is reliably prevented.

[0021]

[0022]

According to a second aspect of the present invention, in the first aspect of the present invention, a predetermined number of spacers having a predetermined thickness are provided on the upper surface of the base plate before the lower unit is suspended on the upper surface of the base plate. After that, dry mortar is spread.

According to the present invention, by installing the lower unit on the base board, the dry mortar spread on the base board by its weight is brought into a compressed state, and the spacer arranged on the base board is compressed. As a result, the distance between the base panel and the lower unit becomes a predetermined dimension, so that the level setting of the lower unit in the vertical direction is reliably performed. And the weight of the lower unit is evenly supported on the foundation board through the compressed dry mortar, and the dry mortar absorbs the surrounding water vapor and solidifies by a chemical reaction, so the basement unit consisting of the upper and lower units Will serve as a solid foundation in favor of

[0025]

FIG. 1 is a perspective view showing an embodiment of a basement unit made of precast concrete to which a connecting structure and a connecting method of the present invention are adopted. As shown in this figure, a precast concrete basement unit 10
a and a basement unit 10b to be installed next to the basement unit 10a.

Each of the units 10a and 10b includes a base board 11
A lower unit 20 (a lower pre-installed unit 20a and a lower post-installed unit 20b), and an upper unit 30 (a pre-installed upper unit 30a and a later-installed upper unit 30b) stacked on the lower unit 20; Consists of The lower unit 20 and the upper unit 30 are structurally strong with a reinforcing bar 10d (FIG. 2) arranged inside.

The base plate 11 is formed in a flat plate shape from reinforced concrete on a ground work T on which a rock stone S or the like is laid at the bottom of a vertical hole H excavated in the site. On the surface of the base board 11, a first fitting groove 12 for the lower unit 20a, a second fitting groove 13 for the lower unit 20b, and the first and second fitting grooves 12, 13 between the lower unit 20a and the lower unit 20b.
And a common fitting groove 14 which is provided at the joint position with the front and rear lower units 20a and 20b. These fitting grooves 12, 13, and 14 are oriented so as to be parallel to each other.

The first fitting groove 12 is formed by a square groove whose opposed groove walls are vertically set in a side view, while the second fitting groove 13 is formed to be constricted downward. Has a groove-side inclined surface 15 whose edge remote from the pre-installed basement unit 10a is inclined. In addition, the common fitting groove 14
The groove width of the upper surface opening is 2 times the groove width of the first fitting groove 12.
The second fitting groove 13 is slightly wider than the second dimension and has an edge farther from the basement unit 10a.
A groove-side inclined surface 15 similar to that formed in FIG.

On the other hand, at the bottom of the lower unit 20a, there is provided a first fitting body 21 which fits into the first fitting groove 12 and half of the common fitting groove 14. 20b, the second fitting groove 13
And a second fitting body 22 that fits into the other half of the common fitting groove 14. On the surface of the second fitting body 22 facing the groove-side inclined surface 15, a fitting-body-side inclined surface 23 having the same inclination angle as the groove-side inclined surface 15 is provided.

The upper surface of the base board 11 and the lower unit 2
A predetermined number of solid spacers 16 having a predetermined thickness are uniformly disposed between the bottom and the bottom surface of the solid spacers.
An empty kneading mortar 17 is laid between the solid spacers 16. With these components, the lower unit 20 is separated from the surface of the base board 11 by the thickness dimension of the solid spacer 16 and the weight of the base board 11 is uniformly distributed through the solidified kneading mortar 17. Is to be supported.

A seal member 18 is provided between the basement unit 10a and the basement unit 10b. This seal member 18 is a step-portion seal member 181 made of butyl rubber or chloroprene rubber which is applied around an entrance 10c opened at the joint surface between the basement unit 10a and the basement unit 10b.
And a waterproof sealing member 182 made of, for example, a cement-based special mortar or the like, uniformly interposed between opposed wall surfaces of the preceding and following basement units 10a and 10b.

At the upper end edge of the lower unit 20 and the lower end edge of the upper unit 30, reinforcing metal angle members 19 are disposed so as to be flush with the inner and outer wall surfaces. The metal angle member 19 is connected to the lower unit 20.
And it is welded and integrated with the reinforcing bar 10d (FIG. 2) provided in the upper unit 30. These metal angle members 19 are spot-welded at predetermined pitches at portions where the lower unit 20 and the upper unit 30 are stacked and in contact with each other.
0 and the upper unit 30 stacked therewith are integrated and extremely structurally strong.

According to the configuration of the basement unit 10, first, with the solid spacer 16 and the empty kneading mortar 17 laid on the surface of the base plate 11, the pre-installed lower unit 20 a and the first fitting body 21 The upper unit 30a is suspended so as to fit into the first fitting groove 12 and the common fitting groove 14 of the panel 11, and then the upper unit 30a is stacked on the lower unit 20a via a predetermined sealing member. After being lowered, the upper base unit 10a in which the lower unit 20a and the upper unit 30a are integrated by welding the upper and lower metal angle members 19 that are in contact with each other is constructed on the base plate 11. Will be.

Next, after the step seal member 181 and the waterproof seal member 182 are formed on the surface of the basement unit 10a facing the rear basement unit 10b, the rear lower unit 20b is connected to the second fitting body 22. It is hung on the base board 11 so as to face the second fitting groove 13 and the common fitting groove 14 of the base board 11. In this case, since the second fitting body 22 of the rear lower unit 20b is tapered, even when the rear lower unit 20b is considerably separated from the preceding basement unit 10a, the second fitting body 22 is removed.
Can be fitted into the second fitting groove 13 and the common fitting groove 14, so that the lower positioning of the lower unit 20b is not required to have a high degree of positioning accuracy. The second fitting groove 13 and the common fitting groove 14
Can be fitted into

Once the second fitting body 22 is fitted into the second fitting groove 13 and the common fitting groove 14, the second fitting body 22 can be fitted only by gently suspending the lower unit 20b. The united-side inclined surface 23 slides on the groove-side inclined surface 15 of the second fitting groove 13 and the common fitting groove 14, and the rear lower unit 20b moves in the direction of the preceding lower unit 20a. Then, when the rear lower unit 20b is released from suspension in a state where the rear lower unit 20b is opposed to the front lower unit 20a with the seal member 18, the rear lower unit 20b becomes horizontal due to its weight. Since the seal member 18 moves in the direction of the pre-installed lower unit 20a while pressing the seal member 18 by a component force, the seal member 18 is pressed and sandwiched between the pre-installed and later-described lower units 20a and 20b, thereby obtaining a reliable sealing effect. Will be done.

By the way, the rear lower unit 20b can be installed next to the pre-installed basement unit 10a as described above. However, when stacking the rear upper unit 30b on the rear lower unit 20b, Since the upper edge portion of the rear lower unit 20b is not provided with the one corresponding to the groove-side inclined surface 15, there is no method for pressing the rear upper unit 30b against the front upper unit 30a. Unit 30b and pre-installed upper unit 30a
And the upper and lower upper units 30a and 30b cannot press and hold the seal member 18 interposed between the upper and lower upper units 30a and 30b.
There was a disadvantage that the sealing effect between a and 30b could not be perfect.

In the construction method of Japanese Patent No. 944565 filed by the applicant, the rear upper unit 30b is stacked in advance with the rear lower unit 20b at another place, and the rear basement is installed. The unit 10b was built up, and the inferior inconvenience was solved by suspending and lowering the rear basement unit 10b on the base panel 11. However, the rear lower unit 20b and the rear upper unit 30b are both approximately 10 t. Since the combined basement unit 10b is approximately 20 tons, it is necessary to use a very large-scale crane device to suspend such a heavy object. The use of large-scale crane equipment at the site was virtually difficult.

The present invention has been made in order to solve such inconvenience, and the rear upper unit 30b is provided.
Can be easily and reliably pressed by the rear upper unit 30b, whereby the seal unit 18 can be pressed by the rear upper unit 30b. This makes it possible to eliminate poor sealing between the installation units 30b.

Hereinafter, the connection structure of the rear basement unit 10b, which is a premise of the connection method of the present invention, will be described in detail with reference to FIGS. FIG. 2 shows a rear basement unit 10.
FIG. 3B is an exploded perspective view showing one embodiment of FIG. 3B, and FIG. 3 is a partially cutaway assembled perspective view thereof. Also, FIG.
FIG. 5 is a cross-sectional view taken along a line A, and FIG. 5 is an enlarged view of a portion (in a circle) of FIG. 4 and shows a state where upper and lower step edges are connected.

As shown in these figures, the rear lower unit 20b includes a lower peripheral wall 24 having a rectangular shape in plan view,
The lower peripheral wall 24 includes a bottom plate 25 having a closed bottom opening, and a lower peripheral wall 24 having a first stepped edge 26 formed at an upper edge thereof.

The lower peripheral wall 24 has a lower contact side wall 241 that contacts the preceding lower unit 20a, and a lower separation side wall 242 that faces the lower contact side wall 241 and is farther from the lower unit 20a. And a pair of erected side walls 243 erected between the respective ends of the lower contact side wall 241 and the lower separated side wall 242. At the center of the lower contact side wall 241, there is provided a notch 244 having an open upper part, which forms the lower half of the entrance 10 c. Reinforcing bars 10d are arranged in the lower peripheral wall 24, whereby the rear lower unit 20b is structurally strong. In addition, the pair of second fitting bodies 22
It is provided on the bottom surface of the bottom plate 25, directly below the lower contact side wall 241 and the lower separation side wall 242, respectively.

As shown in FIG. 2, the first stepped edge portion 26 has a first edge surface 261 which is an upper edge surface of the lower peripheral wall 24 and an upper portion extending from the first edge surface 261 on the outer surface side of the lower peripheral wall 24. And a first annular ridge 262 protruding toward the front end.
With the first edge surface 261 and the first annular ridge 262, FIG.
As shown in FIG. 5, a step is formed on the upper edge surface of the lower peripheral wall 24. A metal angle member 19 is attached to each of the inner (rightward in FIG. 5) corners of the first edge surface 261 and the outer (leftward in FIG. 5) corners of the first annular ridge 262. 24
The upper edge is reinforced. Such metal angle material 1
9 is welded to the upper end of a reinforcing bar 10 d embedded in the lower peripheral wall 24, thereby forming a metal angle member 19.
Are integrated with the lower peripheral wall 24.

As shown in FIGS. 2 and 3, the rear upper unit 30b has an upper peripheral wall 31 having a rectangular shape in plan view.
And a second step edge 32 formed at the lower edge of the upper peripheral wall 31. The upper peripheral wall 31
The upper contact side wall 311 which is in contact with the preceding upper unit 30a, and the upper separation side wall 312 which faces the upper contact side wall 311 and is farther from the preceding upper unit 30a.
And these upper contact side wall 311 and upper separated side wall 31
2 and a pair of upper erected side walls 313 erected between the respective end portions.

At the center of the upper contact side wall 311, there is provided a cutout 314 having an open upper part which forms the upper half of the entrance 10 c. Reinforcing bars 10d are arranged in the upper peripheral wall 31, so that the rear upper unit 30b is structurally strong.

As shown in FIG. 2, the second stepped edge portion 32 has a second edge surface 321 which is a lower edge surface of the upper peripheral wall 31 and a lower portion from the second edge surface 321 on the inner surface side of the upper peripheral wall 31. And a second annular ridge 322 protruding toward the rim. The second edge 321 and the second annular ridge 322 form a step on the lower edge of the upper peripheral wall 31 as shown in FIG. Metal angle members 19 are attached to the outer (leftward in FIG. 5) corners of the second edge surface 321 and the inner (rightward in FIG. 5) corners of the second annular ridges 322, respectively. The upper edge of 31 is reinforced. Such metal angle material 19
Is welded to the lower end of the reinforcing bar 10d embedded in the upper peripheral wall 31, whereby the metal angle member 19 is integrated with the upper peripheral wall 31.

The first annular ridge 262 has a first inclined surface 263 formed on the inner side surface (right side in FIG. 5) (inner peripheral surface), and is tapered upward. 322
Is a second inclined surface 32 whose outer side surface (left side in FIG. 5) (outer peripheral surface) corresponds to the first inclined surface 263 of the first annular ridge 262.
It has been reduced to three.

When the rear upper unit 30b is stacked on the rear lower unit 20b, the second annular ridge 322 is fitted into the first annular ridge 262, and faces each other. The first and second annular ridges 2 are formed such that a gap of a distance D is formed between the inclined surfaces 263 and 323.
The width dimensions of 62 and 322 are set. A step portion seal member 181 made of butyl rubber or the like is interposed between the first step edge portion 26 and the second step edge portion 32.

According to the connecting method of the present invention, in the rear basement unit 10b configured as described above, the rear upper unit 30b is stacked on the rear lower unit 20b constructed adjacent to the preceding basement unit 10a. It is to be constructed and connected to the pre-installed upper unit 30a. In this connection method, a jack device 40 as shown in FIGS. 6 to 8 is used.

Hereinafter, the jack device 40 will be described first. FIG. 6 is a perspective view showing an embodiment of the jack device 40, and shows a state where the jack device 40 is mounted on the rear lower unit 20b. Also, FIG.
FIG. 8 is a perspective view showing one embodiment of a variable length rod, and FIG.
FIG. 7 is a partial perspective view of the jack device 40 shown in FIG.

As shown in FIG. 6, the jack device 40 comprises:
Four pillars 41 erected at each of the four corners of the bottom plate 25 of the rear lower unit 20b, and two pillars supported by the two pillars 41 and extended substantially in parallel between the erected side walls 243 of the lower peripheral wall 24. , And two second beam members 43 erected between the first beam members 42 in parallel with each other.

In this embodiment, the support 4
1. Variable length rods whose lengths can be arbitrarily set are adopted as the first beam member 42 and the second beam member 43. As shown in FIG. 7, a variable length rod 44 includes a spiral rod 45 having an external thread screwed on an outer peripheral surface thereof, and a pipe body 4 which is fitted on the spiral rod 45 in a sliding contact state.
6 and a nut body 47 screwed to the spiral rod 45
It consists of A pair of handle bars 471 protruding from the outer peripheral surface of the nut body 47 in the radial direction in opposite directions are provided.

The variable length rod 44 is formed by fitting one side of the spiral rod 45 into which the nut body 47 is screwed into the pipe body 46. According to the variable length rod 44, when the nut rod 47 is rotated clockwise around the spiral rod 45 by operating the handle rod 471 while the spiral rod 45 is in a detented state, the nut body 47 moves rightward in FIG. In order to move, the pipe body 46 is pushed rightward by this movement, whereby the length L of the variable length rod 44 is increased.

Conversely, the nut body 47 is connected to the spiral rod 45
When the nut body 47 rotates counterclockwise, the nut body 47 moves to the left in FIG.
6 will be formed. Then, the spiral rod 45 is inserted into the pipe body 4 so as to fill this gap.
6, the length L of the variable length rod 44 is shortened. Such a variable length rod 44 is
This is applied to the first beam member 42 and the second beam member 43.

The support 41 is, as shown in FIG.
Spiral rod 45 of variable length rod 44 as described above
The base 411 is welded to the lower end of the pipe body 46 with the lower side facing down, and a rectangular cylindrical locking body 412 is welded to the upper end of the pipe body 46.
A locking bolt 413 is threaded through a side portion of the locking body 412, and the first beam 42 is inserted into the locking body 412 and then screwed into the locking member 412 so that the first beam 42 is supported by the pillar. 41.

The first beam member 42 includes a pipe 46 and
The pipe body 46 includes a pair of spiral rods 45 fitted at both ends of the pipe body 46, and nut bodies 47 screwed to the pair of spiral rods 45, respectively. The first beam member 42 has a pipe body 46 whose locking body 412
And fixed to the support column 41 by being fastened with the locking bolts 413. A contact plate 421 for contacting the inner wall surfaces of the rear lower unit 20b and the rear upper unit 30b is fixed to the distal end of each spiral rod 45 by welding or the like.

Similarly to the first beam member 42, the second beam member 43 includes a pipe 46, a pair of spiral rods 45 fitted at both ends of the pipe 46, and a pair of spiral rods 45. Nut body 47 screwed on each
It consists of A contact plate 431 for contacting the inner wall surfaces of the rear lower unit 20b and the rear upper unit 30b is fixed to the tip of each spiral rod 45 of the second beam member 43 by welding or the like. . The second beam member 43 is fixed such that two of them are parallel to the pipe bodies 46 of the pair of columns 41 supported by the columns 41.

FIG. 8 is a partial perspective view of FIG. 6, and shows a joint portion between the first beam member 42 and the second beam member 43. FIG.
As shown in (1), the first beam member 42 and the second beam member 43 have their respective pipe bodies 46 connected to each other by a connecting jig 48. The coupling jig 48 is formed by a pair of upper and lower coupling cylinders 481 in which the directions in which the holes extend are shifted by 90 ° from each other. The connecting portions of the connecting cylinders 481 are formed to be flat, and the flat portions are brought into contact with each other to be welded and stopped, so that the connecting state of the both is stabilized.

Fastening bolts 48b are screwed through the top of the upper connecting cylinder 481 and the bottom of the lower connecting cylinder 481, respectively, to vertically move the first beam 42 and the second beam 43, respectively. By screwing the fastening bolt 482 in a state of being inserted into the connecting cylinder 481 of the first
And the second beam member 43 are connected to each other via a connecting jig 48. Then, in a state where both are joined, each contact plate 42 of the first beam member 42 and the second beam member 43
The height of the support column 41 is set in advance so that the columns 431 project upward from the upper edge of the rear lower unit 20b by a predetermined distance while being separated from the inner wall surface of the rear lower unit 20b.

Hereinafter, the connection method of the present invention will be described with reference to FIGS. 1 to 8 as needed based on FIGS. FIG. 9 is an explanatory view showing an embodiment of the connection method of the present invention. FIG. 9A shows a state immediately before the rear upper unit 30b is suspended on the rear lower unit 20b.
(B) is a state immediately after the rear upper unit 30b is suspended on the rear lower unit 20b, and (c) is a state where the rear upper unit 30b suspended on the rear lower unit 20b is installed first. The state moved in the direction of the upper unit 30a is shown. 10 is the same as FIG.
(B) is a partially enlarged view, and FIG. 11 is (c) of FIG.
FIG. 10 and 11 are cross-sectional views excluding the entrance and exit 10c at the boundary between the pre-installed basement unit 10a and the post-installation basement unit 10b.

When stacking the rear upper unit 30b on the rear lower unit 20b installed in the vertical hole H adjacent to the pre-installed basement unit 10a, first, FIG.
As shown in (a), the jack device 40 is disposed on the bottom plate 25 of the rear lower unit 20b. In this arrangement, the second beam member 43 erected between the lower contact side wall 241 and the lower separation side wall 242 of the rear lower unit 20b
The contact plate 431 on the lower separation side wall 242 side is brought into contact with the upper edge of the lower separation side wall 242 while the lower contact side wall 24
The first contact plate 431 is slightly separated from the upper edge of the lower contact side wall 241.

Thus, the first edge 261 is formed between the inner surface of the first annular ridge 262 and the outer surface of the contact plate 431 at the first stepped edge 26 of the lower separation side wall 242. Is formed, while a considerably wide gap is formed between the first annular ridge 262 on the lower contact side wall 241 side and the contact plate 431.

In this state, the rear upper unit 30b is suspended from the rear lower unit 20b. Then, at the time of the suspension, first, the rear upper unit 30b
The rear upper unit 30b is inclined to the groove so that only the second annular ridge 322 of the upper separation side wall 312 fits into the groove formed between the contact plate 431 and the first annular ridge 262. The first annular ridge 262 is opposed. When the rear upper unit 30b is gently lifted and lowered in this state, as shown in FIG. 9A, the second annular ridge 322 on the upper separation side wall 312 is fitted into the groove while the upper abutment unit 322 is in contact with the upper part. The second annular ridge 322 on the side wall 311 side is a lower contact side wall 241.
The state is located diagonally above the first step edge 26 on the side.

Next, in this state, the rear upper unit 30 is installed.
When the lower unit b is further lowered, the rear upper unit 30b rotates counterclockwise around the tip of the second annular ridge 322, and as a result, as shown in FIG. Stacked on top of.

When the rear upper unit 30b is initially stacked on the rear lower unit 20b, the rear upper unit 30b is separated from the preceding upper unit 30a by the elastic force of the seal member 18, as shown in FIG. The second annular ridge 322 on the upper separation side wall 312 side is in contact with the lower separation side wall 242 via the step portion seal member 181, and the second annular protrusion 322 on the upper separation side wall 311 side is pressed. The two annular ridges 322 are separated from the first annular ridge 262 on the lower contact side wall 241 side. In other words, above
Unit is higher than the normal position that matches the lower unit.
It is in a state separated from the structure.

Next, in the state shown in FIGS. 9B and 10, the handle rod 47 on the upper contact side wall 311 side is used.
1 is operated to rotate the nut body 47 around the spiral rod 45 in a predetermined direction. Then, the spiral rod 45 moves from the pipe body 46 toward the upper contact side wall 311, and the contact plate 431 at the tip thereof contacts the upper contact side wall 311.

When the handlebar 471 is further rotated in a state where the contact plate 431 is in contact with the upper contact side wall 311, the contact plate 431 is stepped with respect to the lower contact side wall 241, and the lower part of the lower contact wall 241 is provided. In order to press the upper contact side wall 311 protruding toward the inside of the unit 20a, the rear upper unit 30b is forcibly moved in the direction of the preceding upper unit 30a. FIG.
As shown in the figure, the lower contact side wall 241 and the upper contact side wall 31
1 is flush with the lower spaced sidewall 242 and the upper spaced sidewall 312. In other words, the upper uni
The upper unit to the proper position where the
30b moves.

In this state, as shown in FIG. 11, the front upper unit 30a and the rear upper unit 30b
The sealing member 18 interposed between the upper and lower units is pressed and elastically compressed by both members, and the elastic force causes the front and back surfaces of the sealing member 18 to be attached to the respective surfaces of the upper unit 30a and the upper unit 30b. Adhesion and a reliable waterproofing effect can be obtained.

As described in detail above, according to the method of connecting the rear upper unit 30b of the present invention, the rear lower unit 2b is connected.
When stacking the rear upper unit 30b on 0b,
While the rear upper unit 30b is suspended diagonally so that the lower edge of the rear upper unit 30b farthest from the pre-installed basement unit 10a is the lowest, the pre-installed basement unit 1
It is suspended on the rear lower unit 20b so that the lower edge of the 0a side is along the facing surface of the pre-installed basement unit 10a.

Then, while the outer surface of the second annular ridge 322 faces the inner surface of the first annular ridge 262 of the rear lower unit 20b, the lower end of the rear upper unit 30b is connected to the first step edge of the rear lower unit 20b. It comes into contact with the part 26. In this state, the edge of the rear upper unit 30b on the front basement unit 10a side is lowered. In this manner, the rear upper unit 30b rotates around the lower end of the second annular ridge 322, which is far from the basement unit 10a, while pivoting around the lower end of the second annular ridge 322. The ridge 322 fits into the first annular ridge 262, and the rear upper unit 30b is stacked on the rear lower unit 20b.

Next, the second annular ridge 322 on the front basement unit 10a side of the rear upper unit 30b and the side wall (lower separated side wall 242) of the rear lower unit 20b on the opposite side to the front basement unit 10a. By interposing the jack device 40 between the edge portion and the jack device 40 by operating the jack device 40, the rear upper unit 30b moves toward the pre-installed basement unit 10a to move the pre-installed basement unit. The sealing member 18 interposed between the rear upper unit 30b and the rear upper unit 30b is compressed, whereby the rear upper unit 30b is placed on the rear lower unit 20b in close contact with the basement unit 10a. Be stacked.

When the rear upper unit 30b is lifted and lowered, the second annular ridge 322 of the rear upper unit 30b is formed on the inner wall surface side, so that it is formed on the outer wall surface side of the rear lower unit 20b. Not only can the positioning at the time of fitting with the first annular ridge 262 being carried out be surely visually confirmed, but also the rear upper unit 30b at the time of fitting can be connected to the pre-installed basement unit 1.
Since it does not move away from 0a, the initial positioning of the rear upper unit 30b is reliably performed.

Therefore, in the conventional one in which the step structure of the opposing edges of the lower unit 20 and the upper unit 30 is opposite to that of the present invention, not only is it difficult to visually recognize the fitting of both, but also the rear upper unit 30b However, since it can be slid in a direction away from the pre-installed basement unit 10a in a state where it is obliquely fitted to the rear lower unit 20b, there is a disadvantage that it is difficult to perform reliable positioning. Such a disadvantage does not occur.

Therefore, the conventional inconvenience that rainwater, groundwater, and the like infiltrate into the basement room from the junction of the two due to insufficient adhesion of the rear upper unit 30b to the preceding basement unit 10a is reliably prevented. can do.

The present invention is not limited to the above embodiment, but includes the following contents.

(1) In the above embodiment, the basement unit 10 has a two-room structure. However, the present invention is not limited to the basement unit 10 having a two-room structure. The above multi-chamber structure may be adopted.

(2) In the above embodiment, the pre-installed basement unit 10a is employed as a building adjacent to the rear lower unit 20b. However, the present invention employs the pre-installed basement unit 10a. The building is not limited to a certain one, and may be a normal building made of reinforced concrete that has already been completed. In addition, as a structure, a tetrahedral precast concrete basement unit in which one side wall is open or a trihedral precast concrete basement unit in which both opposing side walls are open may be adopted. It is possible. And
In particular, when a trihedral structure is used, the trihedral structure is used as an auxiliary unit, and one or more of the trihedral structures are sandwiched between the tetrahedral structures so that there is no partition. A large basement can be built.

[0077]

Effect of the Invention According to claim 1 Symbol placement of invention, with the first annular protrusion of the lower unit is formed on the outer wall surface side of the upper edge portion, the second annular protrusion is the lower edge of the upper unit Since it is formed on the inner wall surface side of the surface, not only the positioning at the time of fitting with the first annular ridge formed on the outer wall surface side of the lower unit can be easily performed while visually confirming, but also the fitting can be performed. When combined, the upper unit does not move away from the building, so that when the upper unit is suspended, the initial positioning of the upper unit can be performed quickly and reliably, contributing to improved workability. be able to.

[0078]

According to the second aspect of the present invention, by mounting the lower unit on the foundation board, the dry mortar spread on the foundation board by its weight becomes compressed and distributed on the foundation board. Since the distance between the base plate and the lower unit is set to a predetermined size by the provided spacer, the level setting of the lower unit in the vertical direction can be appropriately performed. And the weight of the lower unit is evenly supported on the foundation board through the compressed dry mortar, and the dry mortar absorbs the surrounding water vapor and solidifies by a chemical reaction, so the basement unit consisting of the upper and lower units Can serve as a solid foundation to support.

[Brief description of the drawings]

FIG. 1 is a perspective view showing one embodiment of a basement unit made of precast concrete in which a connection structure and a connection method of the present invention are adopted.

FIG. 2 is an exploded perspective view showing one embodiment of a rear basement unit.

FIG. 3 is a partially cutaway perspective view of the rear basement unit of FIG. 2;

FIG. 4 is a sectional view taken along line AA of FIG. 3;

5 is a partially enlarged view of FIG. 4, showing a state in which upper and lower step edges are connected.

FIG. 6 is a perspective view showing an embodiment of a connection jig.

FIG. 7 is a perspective view showing one embodiment of a variable length rod.

8 is a partial perspective view of the connecting jig shown in FIG.

FIG. 9 is an explanatory view showing an embodiment of the connection method of the present invention, in which (a) is a state immediately before a rear upper unit is hung on a rear lower unit, and (b) is a rear state. The state immediately after the upper unit is suspended on the rear lower unit, (c) shows the state in which the rear upper unit suspended on the rear lower unit is moved in the direction of the preceding upper unit. Each is shown.

FIG. 10 is a partially enlarged view of FIG.

11 is a partially enlarged view of FIG.

[Explanation of symbols]

 Reference Signs List 10 basement unit 10a preceding basement unit 10b rear basement unit 10c entrance / exit 10d reinforcing bar 11 base plate 12 first fitting groove 13 second fitting groove 14 shared fitting groove 15 groove side inclined surface 16 solid spacer 17 solid mortar 18 Seal member 181 Step seal member 182 Waterproof seal member 19 Metal angle member 20 Lower unit 20b Rear lower unit 20a Previous lower unit 21 First fitting body 22 Each second fitting body 22 Second fitting body 23 Fitting body Side inclined surface 24 Lower peripheral wall 241 Lower contact side wall 242 Lower separated side wall 243 Bridge side wall 244 Notch 25 Bottom plate 26 First step edge 261 First edge 262 First annular ridge 263 First inclined surface 30 Upper unit 30a Pre-installed upper unit 30b Post-installed upper unit 31 Upper peripheral wall 31 Upper contact side wall 312 Upper separated side wall 313 Upper erected side wall 314 Notch portion 321 Second edge surface 322 Second annular ridge 323 Second inclined surface 32 Second step edge portion 40 Jack device 41 Support column 42 First beam member 43 First Double beam material 44 Variable rod 45 Spiral rod 46 Pipe body 47 Nut body 48 Joining jig 48b Fastening bolt 411 Base 412 Locking body 413 Locking bolt 421 Contact plate 431 Contact plate 471 Handle rod 481 Connecting cylinder 482 Fastening bolt H Vertical hole L Dimension S Kuriishi T Ground business

──────────────────────────────────────────────────続 き Continued on the front page (58) Fields surveyed (Int. Cl. ⁷ , DB name) E02D 29/00 E04B 1/348

Claims (2)

(57) [Claims] And 1. A bottom and a peripheral wall and the lower unit made precast concrete having a and the upper edge surface and lower edge surface shape in a plan view in the lower unit have the same shape as the lower unit in contact with each other Pre- stacked
An upper unit made of cast concrete, wherein the lower unit has an installation position set such that an opposing surface to an outer wall surface of an adjacent building abuts on an outer wall surface of the building, and On the edge surface, a first annular ridge protruding upward is provided over the entire circumference on the outer wall surface side, while the lower edge surface of the upper unit is provided on the inner wall surface side along the entire circumference. A second annular ridge protruding downward is provided, and the first and second annular ridges are an inner peripheral surface of the first annular ridge and an outer peripheral surface of the second annular ridge. Precast concrete basement whose thickness is set so that a gap is formed between the
Using the connection structure of the room units, the lower unit
Stack the upper unit and place it on the outer wall of the adjacent building.
Precast concrete ground for construction
A method of connecting lower units, wherein an upper unit is mounted on a lower unit installed on a base plate.
When stacking knits, the above building on the opposite side
The outer surface of the second annular ridge is the inner surface of the first annular ridge.
Hang the upper unit diagonally so that it contacts
And the outside of the second annular ridge on the building side of the upper unit
Upper unit so that the surface faces the inner surface of the first annular ridge.
The upper unit to fit the lower unit.
The lower unit is located farther from the building than the
So that it can be stacked on the knit, and then the second annular ridge and the lower part on the building side of the upper unit
Interposed between the unit building and the upper edge of the opposite side wall
By operating the jack device, the upper unit is moved to the lower unit.
Move the upper unit to the correct position
Precast characterized by moving in the direction
How to connect concrete basement units. 2. A method according to claim 1, wherein prior to suspending the lower unit on the upper surface of the base board, a predetermined number of spacers having a predetermined thickness are provided on the upper surface of the base board, and then dry mortar is laid. 2. The method for connecting precast concrete basement units according to 1 .