JPH0151609B2 - - Google Patents
Info
- Publication number
- JPH0151609B2 JPH0151609B2 JP57166055A JP16605582A JPH0151609B2 JP H0151609 B2 JPH0151609 B2 JP H0151609B2 JP 57166055 A JP57166055 A JP 57166055A JP 16605582 A JP16605582 A JP 16605582A JP H0151609 B2 JPH0151609 B2 JP H0151609B2
- Authority
- JP
- Japan
- Prior art keywords
- slab
- pine
- foundations
- column
- columns
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired
Links
- 235000008331 Pinus X rigitaeda Nutrition 0.000 claims description 13
- 235000011613 Pinus brutia Nutrition 0.000 claims description 13
- 241000018646 Pinus brutia Species 0.000 claims description 13
- 229910000831 Steel Inorganic materials 0.000 claims description 7
- 239000010959 steel Substances 0.000 claims description 7
- 239000011150 reinforced concrete Substances 0.000 claims 1
- 239000000463 material Substances 0.000 description 5
- 230000003014 reinforcing effect Effects 0.000 description 3
- 239000007787 solid Substances 0.000 description 3
- 238000010276 construction Methods 0.000 description 2
- 238000009415 formwork Methods 0.000 description 2
- 239000002689 soil Substances 0.000 description 2
- 229910001294 Reinforcing steel Inorganic materials 0.000 description 1
- 238000009412 basement excavation Methods 0.000 description 1
- 239000002131 composite material Substances 0.000 description 1
- 239000003673 groundwater Substances 0.000 description 1
- 230000002787 reinforcement Effects 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
Classifications
-
- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D27/00—Foundations as substructures
- E02D27/01—Flat foundations
Description
【発明の詳細な説明】
この発明は、構造物の直接基礎に関するもので
ある。DETAILED DESCRIPTION OF THE INVENTION This invention relates to the direct foundation of structures.
従来から用いられている構造物の直接基礎に
は、独立、複合、連続フーチング基礎およびべた
基礎がある。しかしながら、フーチング基礎の場
合は、上階の柱、壁荷重が集中的にかかるため、
接地圧が大きくなりそれ相当の地耐力を有する地
盤条件が必要である。 Traditionally used direct foundations for structures include independent, composite, continuous footing foundations and slab foundations. However, in the case of footing foundations, the loads on the columns and walls of the upper floors are concentrated, so
The ground pressure is high and ground conditions with corresponding soil bearing capacity are required.
また、べた基礎の場合は、各柱の荷重ならびに
フーチング支配面積が異なるので、接地圧は均一
でなく、とくに端柱において接地圧が大きくなる
等の欠点がある。しかも、フーチング、べた基礎
共に水平力を負担するためと、不均等な接地圧を
一様にするため、および不同沈下対策のために剛
性の高い地中梁を設ける必要があり、これを構築
するため掘削、型枠、鉄筋工事等に極めて多大な
労力と工期とを要していた。 In addition, in the case of a solid foundation, since the load of each column and the controlled area of the footing are different, the ground pressure is not uniform, and there is a drawback that the ground pressure is particularly large at the end columns. Furthermore, it is necessary to install highly rigid underground beams for both footings and solid foundations to bear the horizontal force, to equalize uneven ground pressure, and to prevent uneven settlement. Therefore, excavation, formwork, reinforcing steel work, etc. required an extremely large amount of labor and construction time.
この発明は、前記問題点を解消すべく創作され
たもので、上階からの柱、壁荷重をマツト・スラ
ブ全般にわたり均等に分散させることを目的とし
たものである。 This invention was created to solve the above-mentioned problems, and its purpose is to evenly distribute the column and wall loads from the upper floors over the entire mat and slab.
以下、この発明を実施例に基づいて説明する。
１はマツト・スラブで、上下主鉄筋４，５と該鉄
筋４，５間のPC鋼材２とで構成されている。し
かも、該PC鋼材２は、柱３の集中荷重がかかる
位置ではマツト・スラブ１の下側に、柱３と柱３
との中間位置ではマツト・スラブ１の上側に位置
するように放物線状に配置され、マツト・スラブ
１のコンクリートが打設される。該マツト・スラ
ブ１のコンクリートが所要強度に達すると、PC
鋼材２をマツト・スラブ１の両端で緊張して工事
は完了する。 Hereinafter, this invention will be explained based on examples.
Reference numeral 1 denotes a pine slab, which is composed of upper and lower main reinforcing bars 4 and 5 and a prestressing steel material 2 between the reinforcing bars 4 and 5. Moreover, the PC steel material 2 is placed on the underside of the pine slab 1 at the position where the concentrated load of the column 3 is applied.
At an intermediate position between the pine and slab 1, the concrete of the pine slab 1 is placed in a parabolic shape so as to be located above the pine slab 1. When the concrete of the mat slab 1 reaches the required strength, the PC
The construction is completed by tensioning the steel material 2 at both ends of the pine slab 1.
なお、PC鋼材２は柱３に平行する方向、また
はそれに加えて柱３に直交する二方向にも配置す
ることができる。 Note that the PC steel material 2 can be arranged in a direction parallel to the column 3, or in addition, in two directions orthogonal to the column 3.
この発明は、以上説明したように構成されてい
るので、マツト・スラブに集中的にかかる柱、壁
荷重を分散させることができる。そのため接地圧
を均等にでき、不同沈下の憂いがない。また水平
力についても、マツト・スラブを等価の梁として
評価し、ラーメン構造として処理するが、これは
従来のフラツト・スラブ等の上部構造に対する考
え方と同じである。 Since the present invention is constructed as described above, it is possible to disperse the column and wall loads that are concentratedly applied to the pine slab. Therefore, the ground pressure can be equalized, and there is no need to worry about uneven settlement. Also, regarding horizontal force, the pine slab is evaluated as an equivalent beam and treated as a rigid frame structure, which is the same way of thinking for conventional superstructures such as flat slabs.
従つてこの発明は、フーチング、ベタ基礎とく
らべて地中梁がないので、基礎に関する型枠、鉄
筋工事が大巾に簡略化されると共に、基礎自重が
軽くなることから、比較的低強度の地耐力のとこ
ろでも採用できる。しかも、マツト・スラブには
適度のプレストレスが導入されているのでクラツ
クの発生がなく、地下水位の高い所でも底版から
の湧水の心配がない等の多くの利点を有するもの
である。 Therefore, compared to footings and solid foundations, this invention does not require underground beams, so the formwork and reinforcing work for the foundations are greatly simplified, and the weight of the foundations is lighter, so it is relatively low-strength. It can also be used for soil bearing capacity. In addition, the pine slab has many advantages, such as having a moderate amount of prestress, so that cracks do not occur, and there is no need to worry about spring water from the bottom slab even in areas with high groundwater levels.
図面はこの発明の実施例の断面図である。
１……マツト・スラブ、２……PC鋼材、３…
…柱、４，５……鉄筋。
The drawings are cross-sectional views of embodiments of the invention. 1...Matsuto slab, 2...PC steel material, 3...
...Column, 4, 5...Reinforcement bar.
Claims (1)
いて、柱、壁の集中荷重がかかる位置ではPC鋼
材がマツト・スラブの下側に、柱と柱との中間位
置ではPC鋼材がマツト・スラブの上側に位置す
るように、PC鋼材を放物線状に配置し、緊張し
たことを特徴とするマツト・スラブ基礎構造。1 In a reinforced concrete pine/slab foundation, the prestressing steel is located below the pine/slab at positions where concentrated loads are applied to columns and walls, and above the pine/slab at intermediate positions between the columns. The pine slab foundation structure is characterized by the fact that prestressing steel is placed in a parabolic shape and is under tension.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP16605582A JPS5955921A (en) | 1982-09-25 | 1982-09-25 | Mat slab foundation structure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP16605582A JPS5955921A (en) | 1982-09-25 | 1982-09-25 | Mat slab foundation structure |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS5955921A JPS5955921A (en) | 1984-03-31 |
| JPH0151609B2 true JPH0151609B2 (en) | 1989-11-06 |
Family
ID=15824124
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP16605582A Granted JPS5955921A (en) | 1982-09-25 | 1982-09-25 | Mat slab foundation structure |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS5955921A (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS61126255A (en) * | 1984-11-22 | 1986-06-13 | 株式会社大林組 | Reverse flat slab structure |
| JPH0784743B2 (en) * | 1986-08-12 | 1995-09-13 | 株式会社竹中工務店 | Prestressed concrete foundation slab construction method |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5789030A (en) * | 1980-11-21 | 1982-06-03 | Kajima Corp | Basement structure |
| JPS5796162A (en) * | 1980-12-05 | 1982-06-15 | Kajima Corp | Flat plate construction utilizing |
| JPS57104753A (en) * | 1980-12-18 | 1982-06-29 | Kajima Corp | Arrangement of unbond pc twisted wire in flat slab |
| JPS57151744A (en) * | 1981-03-12 | 1982-09-18 | Kajima Corp | Building structure |
-
1982
- 1982-09-25 JP JP16605582A patent/JPS5955921A/en active Granted
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5789030A (en) * | 1980-11-21 | 1982-06-03 | Kajima Corp | Basement structure |
| JPS5796162A (en) * | 1980-12-05 | 1982-06-15 | Kajima Corp | Flat plate construction utilizing |
| JPS57104753A (en) * | 1980-12-18 | 1982-06-29 | Kajima Corp | Arrangement of unbond pc twisted wire in flat slab |
| JPS57151744A (en) * | 1981-03-12 | 1982-09-18 | Kajima Corp | Building structure |
Also Published As
| Publication number | Publication date |
|---|---|
| JPS5955921A (en) | 1984-03-31 |
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