JP2971810B2 - Construction method of underground structure of multi-story parking lot - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a relatively small multi-story parking garage in which a car is parked in one or three levels in a vertical direction in a private house, a housing complex, an apartment, a park, a public hall or the like. The present invention relates to a method of constructing an underground structure including an underground outer wall and a foundation slab for installing an elevator of a vehicle underground.

[0002]

2. Description of the Related Art In urban areas, the number of automobiles is increasing, and soaring land causes a shortage of parking lots, so that conventional flat parking cannot meet the parking demand. In order to solve such problems, parking buildings with structures that allow cars to be parked up and down, and underground parking lots have been created, but such parking lots are large-scale. In recent years, there has been a demand for a small multi-story parking lot that can effectively use narrow land.

[0003] In this type of multi-story parking lot, the mainstream is one in which cars can be parked in two or three tiers, and a part of them is stored in an underground pit.

[0004] That is, a two-stage or three-stage elevator equipped with a mounting table for a car capable of ascending and descending is installed in an underground pit. In the case of a two-stage type, one underground, one underground, and three In the case of the step type, two units can be stored underground and one unit can be stored above the ground.

[0005] Such an underground pit is composed of a rectangular tube-shaped underground outer wall constituting a wall of an underground portion and a foundation slab constituting a bottom slab of the underground portion. Concrete is cast or built using precast concrete slabs.

[0006]

However, in the above-mentioned prior art, the ground is excavated and concrete is poured,
Since the precast concrete slab is built, it takes time to secure the ground when excavating the ground and secure construction work for the shoring. In addition, there is a problem that safety measures are costly and construction cannot be performed in a narrow place. In addition, there were many issues to be improved in quality control and construction control. Further, in the case of the precast concrete slab, there are problems in terms of rigidity and ease of assembly.

[0007] The present invention has been made to solve the above-mentioned problems, and its object is to facilitate the construction,
In addition, it is possible to provide a method for constructing an underground structure of a multistory parking garage which can perform safe construction, shorten the construction period and reduce costs, can further increase rigidity, and can be easily assembled. It is in.

[0008]

[0009]

According to the present invention, there is provided a method for constructing an underground structure of a multi-storey parking lot, comprising the steps of: forming a rectangular cylindrical underground outer wall constituting a wall of a basement of a parking lot; In constructing the underground structure of the multi-story parking lot consisting of the foundation slabs to be constructed, on the excavable ground, a plurality of circumferentially divided lower foundation segments and upper wall segments constituting the underground outer wall, While being assembled and integrated on the ground, waterproof and waterproofing is applied to the outside and / or inside of each joint of the segment, and excavating the inside of the formed rectangular cylindrical underground outer wall, submerging the underground outer wall into the ground is allowed, when subsidence to a predetermined depth, to build the foundation slab in poured concrete, characterized in that to integrate into the lower foundation segment (claim
1 ).

[0010] The lower base segment and the upper wall segment are joined by a bolt and plate system, a PC steel bar system,
Alternatively, strong connection is performed by a method based on a combination of these methods. In addition, a sealing material is attached via an adhesive to each vertical joint and each horizontal joint of the lower foundation segment and the upper wall segment. That is, the sealing material is applied to the outside and the inside of the joining portion of each segment, or one of the inside and the outside while applying an adhesive resin,
Laminate multiple sheets (single to quadruple) and paste. Alternatively, a glass cloth is attached while applying the adhesive resin, and the adhesive resin is applied thereon. If necessary, it may be filled with a filling material inside the seam (claim 1
-Claim 2 ). The vertical seams of the lower foundation segment and the upper wall segment are staggered so that they are not continuous in the upper and lower stages. ( Claim 4 ) A water blocking plate is interposed between the foundation slab and the lower foundation segment ( Claim 3 ). Lower foundation segments and the upper wall segment, a corner segment integrally formed corner portion of the square tubular shape, consist straight section segments located between the corner segment (claim 5). A partition is provided inside the underground outer wall ( claim 6 ). The segment to which each wall is attached is T-shaped in plan view.

In the above-described configuration, when the segments are assembled on the ground, and the underground outer wall of the integral structure having the waterproof / waterproof construction at each joint is submerged and buried by the submersion method, the construction is facilitated, and the mountain retaining is performed. There is no need for installation or support, and the installation location is minimal, and traffic obstacles can be eliminated. In addition, by sinking the completely constructed underground outer wall, unequal settlement and deformation can be prevented, the sinking can be performed smoothly, and quick work and safe construction can be performed. Further, by providing the intermediate portion outer wall inside the underground outer wall, the rigidity of the underground structure can be increased, and the performance of preventing uneven settlement and preventing deformation can be further improved.

By attaching a sealing material to the outside and / or inside of the vertical seam and the horizontal seam of each segment via an adhesive, and by interposing a water stop plate between the base slab and the lower base segment. , Can improve the earthquake resistance and waterproofness.

[0013] The vertical joints of the respective segments are staggered in the upper and lower stages so as not to be vertically aligned, whereby the strength of the underground structure can be improved. By forming each segment from a corner segment and a straight line segment in a plan view, each corner has an integral structure to improve rigidity and facilitate assembly. Further, by providing a partition inside the underground outer wall, the inside of the underground structure is divided into small rooms, the rigidity of the underground structure can be increased, and the underground structure can be used as a fire barrier. Further, by making the segment to which the partition wall is attached in a T-shape in plan view, each corner of each room has an integral structure, thereby improving rigidity.

[0014]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described below with reference to the illustrated embodiments. FIG. 1 shows an example of a 6-segment underground pit in a two-stage multilevel parking garage, and FIGS. 2 and 3 show examples of a 12-segment underground pit. FIG. 10 shows a case of a three-stage multilevel parking garage. The underground structure, that is, the underground pit 1 is composed of a rectangular cylindrical underground outer wall 2 forming a wall and a base slab 3 forming a bottom slab. The underground outer wall 2 includes a plurality of base segments 4 and a plurality of wall segments 5 made of precast concrete manufactured in a factory.
Consists of In the case of the three-stage type, the wall segment 5 is composed of two-stage wall segments 5-1 and 5-2 (see FIG. 10).

Base segment 4 and wall segment 5
Is composed of two types of segments, namely, an L-shaped corner segment 6 integrally forming a corner portion of a rectangular tube shape in a plan view, and a linear straight segment 7 disposed between these segments. And an underground pit 1
To increase the rigidity and facilitate assembly.

In each of the segments 4 and 5, the vertical seam 8 for joining the segments in the horizontal direction may be staggered so as not to be continuous with the upper and lower segments as shown in FIGS. As shown in FIG. 3, the upper and lower positions may be matched. If the vertical seams 8 are staggered as shown in FIGS. 1 and 2, the strength can be improved.

The segments 4 and 5 are joined using bolt plates or PC steel rods to ensure a strong connection. FIGS. 4 and 5 show examples of the bolt and plate method, in which the vertical seam 8 of each segment is used.
Also, a plurality of bolt joints are arranged at intervals at the horizontal seam 9. Figure 5
The following two methods can be adopted.

In the bolt and plate system shown in FIGS. 5A and 5B, a semi-elliptical concave portion 10 is provided on the outer surface of the segment at the vertical seam 8 and the horizontal seam 9 in front view. A joint iron plate 11 having a U-shape is buried such that its joint surfaces are in contact with each other, and a pair of adjacent joint iron plates 11 are fastened by tightening bolts and nuts 12. The joining iron plate 11 is firmly fixed in the concrete of each segment by the anchor bar 13. After the fastening, the recess 10 is filled with a mortar 14.

In the bolt and plate system shown in FIGS. 5 (c) and 5 (d), a joining plate 50 which straddles adjacent segments around the vertical seam 8 and the horizontal seam 9 is attached to the outside and inside of the segment. Then, the joining plate 50 is fixed to each adjacent segment with a joining bolt 51. An insert nut 52 is embedded in the end of each segment, and a joining bolt 51 is screwed into the insert nut 52 through a mounting hole of the joining plate 50.

FIG. 6 shows an example of the PC steel rod system, in which a PC steel rod 15 is vertically and horizontally penetrated in each of the segments 4 and 5. The PC steel bar 15 is inserted into the insertion hole 16, and the end located in the recess 17 is fastened by the plate 18 and the nut 19. Although not shown, the vertical seam 8 may be joined by a PC steel rod method, and the horizontal seam 9 may be joined by a bolt / plate method. Conversely, the vertical seam 8 is bolt-plate type and the horizontal seam 9
May be a PC steel rod system.

The vertical seam 8 and the horizontal seam 9 use a waterproof / waterproof structure as shown in FIG. That is, the vertical seam 8
And a sealing material 20 (glass fiber or carbon fiber woven fabric) that extends over the adjacent segment with the horizontal seam 9 as the center was applied to both the outer and inner surfaces of the segment, or to either the inner or outer surface. Paste with adhesive. This operation is not limited to one time, but may be repeated about four times to stack a plurality of the sealing materials 20.
If necessary, a sealing filler 22 is filled in a concave portion 21 formed at the center of the cross section of the vertical seam 8 and the horizontal seam 9 to secure the seal. With such a waterproof / waterproof structure, earthquake resistance and waterproofness can be improved.

In the case of the joining method using bolts and plates, this waterproofing / water stopping operation is performed before the joining iron plate 11 or the joining plate 50 is attached. In the case of the PC steel rod system, it can be performed after joining.

As shown in FIG. 8, a fire-preventing partition wall 26 may be provided in the intermediate portion of the rectangular cylindrical underground outer wall 2. The partition wall 26 has the straight portion segment 7 as a T-shaped segment 7 ′ in plan view, and the partition wall 26 is firmly connected to the projecting portion of the segment 7 ′ by a bolt plate method, a PC steel bar method, or the like. By providing the partition 26, the inside of the underground pit 1 is divided into small rooms, and the rigidity of the underground pit 1 can be increased. Further, each corner of each small room is formed integrally by the T-shaped segment 7 ', so that the rigidity of the underground pit 1 can be further increased.
Further, the partition wall 26 can also be used as a beam support.

The outer diameter of the base segment 4 is formed to be slightly larger in the lower part 4b than in the upper part 4a (FIGS. 1-4, FIG. 9).
Reference), the friction between the wall segment 5 and the surrounding ground during the submersion described later is reduced so that the settlement can be performed relatively smoothly. The outer diameter of the lower part 4b and the height from the lower end are set according to the soil properties of the surrounding ground. For example, when the surrounding ground is made of clay, the outer diameter is reduced and the height is increased. Also, a tuyere for submersion is formed by attaching a divergent taper 4c inside the lower portion of the base segment 4.

As shown in FIG. 9, the foundation slab 3 is laid with a split stone 30 on a root cut excavated to a predetermined depth, as described later, and a concrete 31 is poured on it. It is constructed by casting a cast-in-place concrete 32 at the center. An insert nut 33 is buried at a predetermined height inside the base segment 4, and an anchor bolt 34 is horizontally protruded from the insert nut. The anchor bolt 34 is welded to a reinforcing steel bar 35 arranged in the cast-in-place concrete 32 to fix the foundation slab 3 and the foundation segment 4 constantly.

Further, between the periphery of the base slab 3 and the inner surface of the base segment 4, a water stop plate 36 made of rubber, plastic, or the like is horizontally interposed to stop the water between the base slab 3 and the base segment 4. Complete water treatment. Before pouring the cast-in-place concrete 32, one end of the water stop plate 36 is fitted into a groove 37 formed on the inner surface of the base segment 4 so as to project horizontally. The base slab 3 is provided with a drain groove 40 and a drain basin 41 (see FIGS. 1 to 4 and FIG. 9).

The underground pit having the above-described structure is constructed by the following procedure using a submerged box method. Note that this is the case of a three-tiered multi-story parking lot.

(1) Land preparation work and lower segment assembly work on the ground The ground that can be excavated is leveled flat. On this ground, as shown in FIG.
They are arranged at predetermined positions in the order of c, d, e, f.

Each base segment 4 is adjusted so that the dimensions of the lower part of the underground pit 1 are as designed. After the adjustment is completed, the vertical seam 8 of each base segment 4 is
The base segments 4 are completely fixed in a rectangular tube shape by joining with the nuts 12 or the like or the PC steel rods 15 and connecting the respective base segments 4 in the lateral direction.

(2) Assembling the middle segment on the ground On the base segment 4 integrated by assembling and fixing, the middle wall segment 5-1 is divided into a ₁ , b ₁ , c ₁ , d ₁ ,
They are arranged at predetermined positions in the order of e ₁ and f ₁ . Underground pit 1
Each wall segment 5-1 is adjusted so that the respective dimensions in the middle section are as shown in the design drawing. After the adjustment is completed, the vertical seam 8 of each wall segment 5-1 is joined with a fastening bolt / nut 12 or the like or a PC steel rod 15, and the horizontal direction of each wall segment 5-1 is connected to form a wall segment. 5-1 is completely fixed in a rectangular tube shape.

(3) Assembling the upper segment on the ground On the wall segment 5-1 integrated by assembling and fixing, the upper segment 5-2 is divided into a ₂ , b ₂ , c ₂ ,
_They are arranged at predetermined positions in the order of d ₂ , e ₂ and f ₂ .

The respective wall segments 5-2 are adjusted so that the respective dimensions of the upper section of the underground pit 1 match the design drawings. After the adjustment, the vertical seam 8 of each wall segment 5-2 is joined with a tightening bolt / nut 12 or the like or a PC steel rod 15,
The lateral direction of each wall segment 5-2 is connected, and the wall segment 5-2 is completely fixed in a rectangular tube shape.

(4) Integration work and sealing work for upper, middle and lower segments Segments 4,5-1,5-
Connect the horizontal seam 9 of 2 with the tightening bolt / nut 12 or P
Joined with C steel rods 15 and connected in the vertical direction of each segment to form a rectangular cylindrical underground outer wall 2 having an integral structure. Before or after the fastening of each segment, the sealing material 20 is attached to the outside and inside of the segment, or any one of the inside and outside surfaces, using an applied adhesive. This operation is performed about once to four times. If necessary, the underground outer wall 2
Is provided with a fire prevention partition 26.

(5) Submersion work of the underground outer wall by the submerged box method While excavating the ground inside the integrated rectangular cylindrical underground outer wall 2 using a crane or the like, the rectangular cylindrical underground outer wall 2 is gradually weighted by its own weight. To sink. At this time, since the completely assembled underground outer wall 2 is settled, uneven settlement and deformation are prevented and the lower part 4b of the base segment 4 can be settled more smoothly.

(6) Construction work of the foundation slab When the underground outer wall 2 sinks to a predetermined position, the bottom of the root cutting is leveled, the split stone 30 is laid thereon, and the discarded concrete 31 is poured. Next, while reinforcing reinforcement 35 is arranged, it is welded to the anchor bolt 34 and the cast-in-place concrete 32 is cast to construct the foundation slab 3. If necessary, the water stop plate 36 is attached before the concrete 32 is poured.

(7) Backfilling work When the underground outer wall 2 and the foundation slab 3 are integrated to complete the underground pit 1, earth and sand are backfilled on the outer periphery of the underground pit 1 to form the planned ground. Thereby, the underground structure of the multistory parking lot is completed.

It is to be noted that, without being limited to the above embodiment, the base segment and the wall segment can be divided into about 2 to 20 divisions, and are stacked in the height direction from about 1 to about 10 steps. be able to.

Although the above description has been made on the case where each segment is assembled on the ground and then excavated and submerged, each segment may be assembled after excavating the ground.

[0039]

Since the present invention has the above configuration, the following effects can be obtained.

(1) Assembling each segment on the ground and submerging and burying the underground outer wall of an integral structure with waterproofing and waterproofing at each joint by the submersion method, construction is easy,
The safety construction cost and the like can be reduced without the need for a mountain buckle or a shoring work, so that the construction period can be shortened and the cost can be reduced.

(2) The installation place can be minimized, an underground structure can be constructed even in a narrow place, the influence on the surrounding area is small, and the obstacle to traffic can be eliminated.

(3) Subsidence of the completely constructed underground outer wall can prevent uneven settlement and deformation,
It sinks smoothly, enabling quick work and safe construction.

(4) A sealing material is attached to the outside and / or inside of the vertical seam and the horizontal seam of each segment via an adhesive, and a water stop plate is interposed between the base slab and the lower base segment. By doing so, the earthquake resistance and waterproofness of the underground structure can be improved.

(5) By making the vertical seams of each segment staggered in the upper and lower stages so as not to be vertically aligned,
The strength of the underground structure can be improved.

(6) By forming each segment from a corner segment and a straight segment in plan view,
Each corner has an integral structure to improve rigidity and facilitate assembly.

(7) Each segment is manufactured in a factory and has excellent quality. By providing a partition in the underground outer wall, the inside of the underground structure is divided into small rooms, and the rigidity of the underground structure can be increased. Further, by making the segment to which the partition wall is attached in a T-shape in plan view, each corner of each room has an integral structure, thereby improving rigidity. In addition, it can be used as a fire barrier, minimizing fire and earthquake disasters.

[Brief description of the drawings]

FIG. 1 shows an example of an underground structure of a multistory parking lot according to the present invention, wherein (a) is a plan view, (b) is a front view, and (c) is a side view.

FIG. 2 shows another example of the underground structure of the multistory parking lot according to the present invention, wherein (a) is a plan view, (b) is a front view, and (c) is a side view.

FIG. 3 shows another example of the underground structure of the multistory parking garage according to the present invention, wherein (a) is a plan view, (b) is a front view, and (c) is a side view.

FIG. 4 shows a bolted structure of an underground outer wall of a multistory parking lot according to the present invention, wherein (a) is a plan view of the underground outer wall, (b) is a front view of the underground outer wall, and (c) is a side view of the underground outer wall. is there.

5A and 5B show a bolted structure of an underground outer wall of a multistory parking lot according to the present invention, wherein FIG. 5A is a front view of a first bolted method, FIG. 5B is a sectional view of the first bolted method, c) is the second
FIG. 5D is a sectional view of the bolt connection method, and FIG. 6D is a front view of the second bolt connection method.

FIG. 6 shows a PC steel bar joint structure of an underground outer wall of a multistory parking lot according to the present invention, wherein (a) is a plan view of the underground outer wall, (b) is a front view of the underground outer wall, and (c) is a side surface of the underground outer wall. FIG. 2D is a partial detailed front view.

FIG. 7 is a sectional view showing a seal structure of a segment joint portion of an underground outer wall according to the present invention.

FIG. 8 shows an example in which a partition is provided on the underground outer wall of the multistory parking lot according to the present invention, wherein (a) is a plan view, (b) is a front view, and (c) is a side view.

9A and 9B show a base slab as a bottom plate of a multistory parking garage according to the present invention, wherein FIG. 9A is an overall sectional view, and FIG. 9B is a partially enlarged sectional view.

FIG. 10 shows a method of constructing an underground structure according to the present invention, wherein (a) to (c) are plan views, (d) is a front view, and (e) is a side view.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 ... Underground pit (underground structure) 2 ... Underground outer wall 3 ... Foundation slab 4 ... Foundation segment 5 ... Wall segment 6 ... Corner segment 7 ... Straight segment 7 '... T-shaped segment 8 ... Vertical seam 9 ... Horizontal Seam 10 ... recess 11 ... joining iron plate 12 ... tightening bolts and nuts 13 ... anchor bar 14 ... mortar 15 ... PC steel rod 16 ... insertion hole 17 ... recess 18 ... plate 19 ... nut 20 ... sealing material 21 ... recess 22 ... filling Material 26: Fireproof partition wall 30: Split stone 31 ... Discarded concrete 32 ... Cast-in-place concrete 33 ... Insert net 34 ... Anchor bolt 35 ... Reinforcing reinforcing bar 36 ... Water stop plate 37 ... Groove section 40 ... Drainage groove 41 ... Drainage basin 50 ... Joining plate 51 ... Joint bolt 52 ... Insert nut

Continuation of front page (56) References JP-A-2-209527 (JP, A) JP-A-6-193294 (JP, A) JP-A-6-316944 (JP, A) JP-A-7-292695 (JP) , A) JP-A-57-158436 (JP, A) (58) Fields investigated (Int. Cl. ⁶ , DB name) E02D 29/00 E02D 29/045 E04H 6/02 E21D 13/00

Claims (6)

(57) [Claims] When constructing an underground structure of a three-dimensional parking lot comprising a rectangular cylindrical underground outer wall forming a wall of a basement of a parking lot and a base slab forming a bottom plate of the basement of the parking lot, On a possible ground, a plurality of circumferentially divided lower foundation segments and upper wall segments constituting the underground outer wall are assembled and integrated on the ground, and waterproof on the outside and / or inside of each joint of the segments.・ Water-stopping, sinking the underground outer wall into the ground while excavating the inside of the formed rectangular cylindrical underground outer wall and sinking to a predetermined depth, constructing the foundation slab with cast-in-place concrete A method for constructing an underground structure of a multistory parking lot, wherein the method is integrated with the lower foundation segment. 2. The method for constructing an underground structure according to claim 1 , wherein a sealing material is attached to each vertical seam and each horizontal seam of the lower foundation segment and the upper wall segment via an adhesive. A method for constructing an underground structure of a multistory parking lot characterized by the following. 3. A method for constructing the underground structure according to claim 1 or claim 2, waterstop between the foundation slab and the lower foundation segments of multi-storey car park, characterized in that it is interposed How to build underground structures. 4. The method of claim 1, is in the construction method of the underground structure according to claim 2 or claim 3, the tongue and groove as the longitudinal seam of the lower foundation segments and the upper wall portion segment is not contiguous with upper and lower A method for constructing an underground structure of a multi-story parking lot characterized by the following. 5. The method according to claim 1 , 2 or 3 ,
In the method for constructing an underground structure according to claim 4 , the lower foundation segment and the upper wall segment include a corner segment integrally forming a corner of a rectangular cylindrical shape, and a straight line located between the corner segments. A method for constructing an underground structure of a multistory parking garage, comprising: a segment. 6. The claim 1 , claim 2 , claim 3 , claim 3.
The method for constructing an underground structure of a multistory parking lot according to claim 4 or 5 , wherein a partition is provided inside the underground outer wall.