JPH02269228A - Structure for retaining wall and construction method for retaining wall - Google Patents
Structure for retaining wall and construction method for retaining wallInfo
- Publication number
- JPH02269228A JPH02269228A JP8836989A JP8836989A JPH02269228A JP H02269228 A JPH02269228 A JP H02269228A JP 8836989 A JP8836989 A JP 8836989A JP 8836989 A JP8836989 A JP 8836989A JP H02269228 A JPH02269228 A JP H02269228A
- Authority
- JP
- Japan
- Prior art keywords
- retaining wall
- wall
- reaction force
- vertical wall
- lightweight
- 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.)
- Pending
Links
- 238000010276 construction Methods 0.000 title claims abstract description 14
- 239000003562 lightweight material Substances 0.000 claims abstract description 11
- 239000000463 material Substances 0.000 claims description 8
- 239000013049 sediment Substances 0.000 abstract 2
- PPBRXRYQALVLMV-UHFFFAOYSA-N Styrene Chemical compound C=CC1=CC=CC=C1 PPBRXRYQALVLMV-UHFFFAOYSA-N 0.000 abstract 1
- 239000006260 foam Substances 0.000 abstract 1
- 238000010586 diagram Methods 0.000 description 6
- 239000004576 sand Substances 0.000 description 6
- 230000000694 effects Effects 0.000 description 3
- 238000000034 method Methods 0.000 description 3
- 239000004575 stone Substances 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 2
- 238000009415 formwork Methods 0.000 description 2
- 239000002689 soil Substances 0.000 description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 2
- 229920006328 Styrofoam Polymers 0.000 description 1
- 238000009412 basement excavation Methods 0.000 description 1
- 239000004568 cement Substances 0.000 description 1
- 230000005484 gravity Effects 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000008267 milk Substances 0.000 description 1
- 210000004080 milk Anatomy 0.000 description 1
- 235000013336 milk Nutrition 0.000 description 1
- 239000008261 styrofoam Substances 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
Landscapes
- Retaining Walls (AREA)
Abstract
Description
【発明の詳細な説明】
〔産業上の利用分野〕
本発明は、擁壁の構造及び擁壁の施工方法に関するもの
である。DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a retaining wall structure and a retaining wall construction method.
この種擁壁は、第3図のように、支持層イに杭基礎つを
配置して擁壁アを支持するものや、第4図のように、擁
壁アの底版工下周辺の地盤を例えば薬液、セメントミル
ク、埋め戻し土を砂や砕石に置換して地盤改良オをして
擁壁アを配置するものがある。As shown in Figure 3, this type of retaining wall is one in which a pile foundation is placed on the supporting layer A to support retaining wall A, and as shown in Figure 4, the ground around the bottom slab of retaining wall A is For example, there are methods to improve the ground by replacing chemical solutions, cement milk, and backfill soil with sand or crushed stone, and then installing retaining walls.
ところで、例えば、L型擁壁アに作用する荷重、例えば
擁壁本体の自重や底版上の裏込土砂の重量並びに土圧の
作用力によって擁壁底面に発生する地盤の鉛直反力(以
下地盤反力)の分布は第1図第2図の様に台形分布もし
くは三角形分布である。By the way, for example, the loads acting on the L-shaped retaining wall A, such as the own weight of the retaining wall itself, the weight of backfilled soil on the bottom slab, and the acting force of earth pressure, cause vertical reaction force of the ground (hereinafter referred to as ground vertical reaction force) generated at the bottom of the retaining wall. The distribution of the reaction force is a trapezoidal or triangular distribution as shown in Figs. 1 and 2.
そして、擁壁の鉛直支持に対する安定は、地盤反力が擁
壁底面に接する地盤の許容鉛直支持力以下であることが
必要である。In order to ensure the stability of the retaining wall against vertical support, it is necessary that the ground reaction force be less than or equal to the permissible vertical support force of the ground in contact with the bottom surface of the retaining wall.
しかし、前記従来の技術では、前記条件を満足しないた
めに、基礎杭や地盤改良による工法が行なわれている。However, since the above-mentioned conventional technology does not satisfy the above-mentioned conditions, construction methods using foundation piles and ground improvement are used.
また、擁壁に作用する荷重によって、擁壁底面に発生す
る地盤反力の分布は擁壁に作用する荷重の大きさと、擁
壁の底面において、作用する荷重の合力Rの作用位置に
よって異なる。合力Rの作用位置が底版中Bの長さの中
心位置Cより前方もしくは後方に底版中Bの176の範
囲にある場合は地盤反力の分布が第1図の地盤反力の分
布(e<1/6B)に示す様に台形分布となり、この範
囲を超えると第2図の地盤反力の分布(e≧1/6B)
に示す様に三角形分布になる。Furthermore, the distribution of the ground reaction force generated on the bottom surface of the retaining wall due to the load acting on the retaining wall differs depending on the magnitude of the load acting on the retaining wall and the location of the resultant force R of the applied loads on the bottom surface of the retaining wall. If the position of action of the resultant force R is within the range of 176 in the bottom slab B, forward or backward from the center position C of the length of the bottom slab B, the distribution of the ground reaction force will be the same as the distribution of the ground reaction force in Fig. 1 (e< 1/6B), it becomes a trapezoidal distribution, and beyond this range, the ground reaction force distribution shown in Figure 2 (e≧1/6B)
The distribution becomes triangular as shown in .
即ち、第1図及び第2図において、地盤反力の最大値(
以下最大地盤反力)は合力Rもしくは、底版中Bの中心
位置Cと合力Rの作用位置の離れ(以下偏心量e)が大
きくなれば大きくなるほど増加し、偏心量eがゼロ、即
ち中心位置Cと合力Rの作用位置が一致した場合、地盤
反力が均等に分布し最大地盤反力dは最小の値になる。That is, in Figures 1 and 2, the maximum value of the ground reaction force (
The maximum ground reaction force hereinafter) increases as the resultant force R or the distance between the center position C of the bottom slab medium B and the acting position of the resultant R (hereinafter referred to as eccentricity e) increases, and when the eccentricity e is zero, that is, the center position When the acting positions of C and the resultant force R match, the ground reaction force is evenly distributed and the maximum ground reaction force d becomes the minimum value.
本発明は、前記擁壁の条件から所定底版長で、地盤反力
を低減させる方法として、擁壁に作用する荷重の底版上
の裏込土砂の重量を軽量化することと、偏心lieを小
さくし地盤反力を均等化させることにより、最大地盤反
力を小さくする擁壁の構造及び擁壁の施工方法の提供を
目的としている。The present invention aims to reduce the weight of backfilling earth and sand on the bottom slab of the load acting on the retaining wall, and to reduce the eccentric lie, as a method of reducing the ground reaction force at a predetermined bottom slab length from the above-mentioned retaining wall conditions. The purpose of the present invention is to provide a retaining wall structure and a retaining wall construction method that reduce the maximum ground reaction force by equalizing the ground reaction force.
上記目的を達成するために、零発朋における第1の発明
の擁壁の構造においては、
擁壁のたて壁背面側の底版上に、地盤反力を低減させる
ための軽量部をたて壁に沿って設けた構成にされている
。また、前記軽量部は、たて壁背面側の底版上に空洞体
を設けて形成した構成にされている。In order to achieve the above object, in the structure of the retaining wall of the first invention in Zero Hatsuho, a lightweight part is erected on the bottom plate on the back side of the vertical wall of the retaining wall to reduce the ground reaction force. It is arranged along the wall. Further, the lightweight portion is formed by providing a hollow body on the bottom plate on the back side of the vertical wall.
さらに、軽量部は、たて壁背面側の底版上に後壁を立設
し、前記たて壁背面と後壁間に軽量材を配設した構成に
されている。Further, the lightweight portion has a configuration in which a rear wall is erected on a bottom plate on the rear side of the vertical wall, and a lightweight material is disposed between the rear wall and the rear wall.
次に、第2の発明の擁壁の施工方法は、基礎上に擁壁を
配置した後、たて壁背面側の底版上に地盤反力を低減さ
せるために軽量コンクリートを打設し、硬化後、裏込め
材を埋め戻す構成にされている。Next, in the construction method of the retaining wall of the second invention, after placing the retaining wall on the foundation, lightweight concrete is poured on the bottom slab on the back side of the vertical wall to reduce the ground reaction force, and then hardened. Afterwards, it is configured to be backfilled with backfilling material.
さらに、第3の発明の擁壁の施工方法は、基礎上に擁壁
を配置した後、地盤反力を低減させるためにたて壁背面
側の底版上に軽量材を配置し、裏込め材を埋戻す構成に
されている。Furthermore, in the retaining wall construction method of the third invention, after placing the retaining wall on the foundation, a lightweight material is placed on the bottom slab on the back side of the vertical wall in order to reduce ground reaction force, and the backfilling material is The structure is designed to backfill.
第8図すのように、軽量部を空洞体とした場合には地盤
反力の分布が第8図すのように、全体の地盤反力が低減
される。As shown in FIG. 8, when the lightweight part is made into a hollow body, the distribution of the ground reaction force is as shown in FIG. 8, and the overall ground reaction force is reduced.
また、第9図に示したように、土圧が支持に対して安定
上有利な位置に作用することにより、偏心量eが小さく
なり、その結果、地盤反力が均等化し最大地盤反力が小
さくなる。In addition, as shown in Figure 9, since the earth pressure acts at a position that is advantageous for stability in relation to the support, the amount of eccentricity e becomes smaller, and as a result, the ground reaction force is equalized and the maximum ground reaction force is reduced. becomes smaller.
なお、P :たて壁高さHに作用する土圧Pl :
” h+ ”P z : /F
h z //P 子 P、 + Pz
Plは、たて壁に対して作用し、P2は後壁若しくは軽
量部に作用するが、擁壁に作用する土圧Pは、直立壁を
設けない場合と変わらない。In addition, P: Earth pressure acting on vertical wall height H Pl:
"h+"Pz: /F
h z //P child P, + Pz Pl acts on the vertical wall, P2 acts on the rear wall or lightweight part, but the earth pressure P that acts on the retaining wall is when no vertical wall is installed. There is no difference.
実施例について図面を参照して説明する。第5図から第
15図において、擁壁lは、底版2上に垂直にたて壁3
が設けられていて、このたて壁3の背面側の底版2には
、先に説明したように地盤反力Sを低減させるための軽
量部4が設けられている。Examples will be described with reference to the drawings. In FIGS. 5 to 15, the retaining wall l is a vertical wall 3 perpendicular to the bottom plate 2.
The bottom plate 2 on the back side of the vertical wall 3 is provided with a lightweight portion 4 for reducing the ground reaction force S, as described above.
前記軽量部4は、たて壁3に沿って第5図aのように断
面はぼ方形又は第5図すのように断面はぼ三角形その他
の形状の空洞体5をたて壁3の背面側の底版2上に一体
設されている。The lightweight portion 4 has a hollow body 5 having a rectangular cross section as shown in FIG. 5A, a triangular cross section as shown in FIG. It is integrally provided on the side bottom plate 2.
この空洞体5には内側側壁に取付朋板101を取付けて
、ガス管、水道管等の配管材10の埋設管路として用い
られる。A mounting plate 101 is attached to the inner side wall of the hollow body 5, and the hollow body 5 is used as a buried conduit for a piping material 10 such as a gas pipe or a water pipe.
また、軽量部4は、第6〜7図のように、たて壁3背面
側の底版2上に軽量材41.42の変形や移動を拘束す
る後壁6をほぼ垂直に立設し、たて壁3と後壁6間に、
比重の軽い例えば塩ビ管41等のパイプ類や、発泡スチ
ロール42等の軽量材が充填されている。In addition, as shown in FIGS. 6 and 7, the lightweight part 4 has a rear wall 6 erected almost vertically on the bottom plate 2 on the back side of the vertical wall 3 to restrain deformation and movement of the lightweight material 41, 42. Between the vertical wall 3 and the rear wall 6,
It is filled with pipes having a light specific gravity, such as PVC pipe 41, and lightweight materials such as Styrofoam 42.
そして、上記擁壁1は、基礎7上に配置した後裏込土砂
Sにより埋め戻される。After the retaining wall 1 is placed on the foundation 7, it is backfilled with earth and sand S.
以上はL形擁壁の場合であるが、T形擁壁11の場合は
第12図のように、たて壁3背面側の底版2上に断面は
ぼ方形又は断面はぼ三角形の空洞体5を一体設して軽量
部4を形成するか、第11図のように軽量コンクリート
43を一体に固定、若しくは別体に形成した軽量コンク
リート43を固定してもよいものである。The above is the case of an L-shaped retaining wall, but in the case of a T-shaped retaining wall 11, as shown in FIG. 5 may be integrally provided to form the lightweight portion 4, or lightweight concrete 43 may be fixed integrally as shown in FIG. 11, or lightweight concrete 43 formed separately may be fixed.
次に、本発明における施工現場で行なわれる擁壁の施工
方法である第2,3の発明を第13図〜第15図により
説明する。Next, the second and third aspects of the present invention, which are retaining wall construction methods performed at a construction site, will be explained with reference to FIGS. 13 to 15.
第2の発明は、掘削部8内に水平部81を形成し、この
水平部81に基礎7を施工し、この基礎7上にL形擁壁
12を配置した後、型枠9をたて壁3の背面側の底版2
上に配置し、たて壁3と型枠9間に軽量材としての地盤
反力を低減させるための軽量コンクリート44を打設す
る。そして前記軽量コンクIJ−ト44が硬化した後、
土砂、砕石等の裏込め材SIを埋め戻して施工されてい
る。In the second invention, a horizontal part 81 is formed in the excavation part 8, a foundation 7 is constructed in this horizontal part 81, an L-shaped retaining wall 12 is placed on this foundation 7, and then the formwork 9 is erected. Bottom plate 2 on the back side of wall 3
A lightweight concrete 44 is placed between the vertical wall 3 and the formwork 9 as a lightweight material to reduce ground reaction force. After the lightweight concrete IJ-t 44 is cured,
Construction is carried out by backfilling with SI backfill material such as earth and sand, crushed stone, etc.
また、第3の発明は軽量コンクリート44等の軽量材を
擁壁12とは別体に工場で製作し、施工現場でたて壁3
の背面側で、底版2上に固着した後、土砂、砕石等の裏
込め材S、を埋め戻して施工されている。Further, the third invention is to manufacture a lightweight material such as lightweight concrete 44 in a factory separately from the retaining wall 12, and to install the vertical wall 3 at the construction site.
After it is fixed on the bottom slab 2 on the back side of the bottom plate, it is constructed by backfilling with backfilling material S such as earth and sand, crushed stone, etc.
本発明は、上述のとおり構成されているので、次に記載
する効果を奏する。Since the present invention is configured as described above, it produces the effects described below.
擁壁のたて壁背面側に配置される裏込め土砂と置換する
軽量部を形成し、または軽量材を配設しであるので、擁
壁の自重を軽量化することにより、全体の地盤反力が低
減される。また、本発明の前記構成により、前記構成に
より土圧が支持に対して安定上有利な位置に作用するこ
とにより、偏心Ieが小さくなり、地盤反力が均等化し
、最大地盤反力が小さくなる。By forming a lightweight part to replace the backfill earth and sand placed on the back side of the vertical wall of the retaining wall, or by installing lightweight materials, the overall ground reaction is reduced by reducing the weight of the retaining wall. force is reduced. Furthermore, with the configuration of the present invention, the earth pressure acts at a position that is advantageous for stability with respect to the support, thereby reducing the eccentricity Ie, equalizing the ground reaction force, and reducing the maximum ground reaction force. .
さらに、軽量部及び軽量材はたて壁の背面側に一体若し
くは一体的に形成したことにより、たて壁と底版との剛
性が高くなり、構造物としての信顛性が高くなる。Further, since the lightweight portion and the lightweight material are integrally formed on the back side of the vertical wall, the rigidity of the vertical wall and the bottom plate is increased, and the reliability of the structure is increased.
また、空洞体の空洞部を利用し、宅地内の例えばガス水
道管等の配管の埋設管路として、配管の保護等維持管理
施設として用いることができる。Further, the hollow part of the hollow body can be used as a buried conduit for pipes such as gas water pipes in a residential area, and as a maintenance facility for protecting pipes.
第1〜2図から第5〜15図までは本発明の擁壁の構造
及び擁壁の施工方法に関し、第1図及び第2図は地盤反
力の分布説明図、第3〜4図は従来例の擁壁説明図、第
5図a、b及び第6〜8図は擁壁の構造説明図、第8〜
9図は地盤反力の説明図、第10図は擁壁の空洞体に配
管材を配設したときの説明図、第11図〜第12図はT
形擁壁の場合の擁壁、第13〜第15図は施工工程の説
明図である。Figures 1 to 2 to Figures 5 to 15 relate to the retaining wall structure and retaining wall construction method of the present invention, Figures 1 and 2 are explanatory diagrams of the distribution of ground reaction force, and Figures 3 to 4 are Explanatory diagrams of conventional retaining walls, Figures 5a and b, and Figures 6 to 8 are structural diagrams of retaining walls, Figures 8 to 8.
Figure 9 is an explanatory diagram of ground reaction force, Figure 10 is an explanatory diagram when piping material is installed in the hollow body of the retaining wall, and Figures 11 and 12 are T
FIGS. 13 to 15 are explanatory diagrams of the construction process of a retaining wall in the case of a shaped retaining wall.
Claims (1)
せるための軽量部をたて壁に沿って設けてなる擁壁。 2、軽量部は、たて壁背面側の底版上に空洞体を設けて
形成してなる請求項1記載の擁壁。 3、軽量部は、たて壁背面側の底版上に後壁を立設し、
前記たて壁背面と後壁間に軽量材を配設してなる請求項
1記載の擁壁。 4、基礎上に擁壁を配置した後、たて壁背面側の底版上
に地盤反力を低減させるために軽量コンクリートを打設
し、硬化後、裏込め材を埋め戻す構成の擁壁の施工方法
。 5、基礎上に擁壁を配置した後、地盤反力を低減させる
ためにたて壁背面側の底版上に軽量材を配置し、裏込め
材を埋戻す構成の擁壁の施工方法。[Claims] 1. A retaining wall in which a lightweight part for reducing ground reaction force is provided along the vertical wall on the bottom slab on the back side of the vertical wall. 2. The retaining wall according to claim 1, wherein the lightweight portion is formed by providing a hollow body on the bottom plate on the back side of the vertical wall. 3. For the lightweight part, the rear wall is set up on the bottom plate on the back side of the vertical wall,
2. The retaining wall according to claim 1, further comprising a lightweight material disposed between the back surface of the vertical wall and the rear wall. 4. After placing the retaining wall on the foundation, lightweight concrete is placed on the bottom slab on the back side of the vertical wall to reduce ground reaction force, and after hardening, the retaining wall is backfilled with backfill material. Construction method. 5. After placing the retaining wall on the foundation, a lightweight material is placed on the bottom slab on the back side of the vertical wall to reduce ground reaction force, and the retaining wall is backfilled with backfill material.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP8836989A JPH02269228A (en) | 1989-04-07 | 1989-04-07 | Structure for retaining wall and construction method for retaining wall |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP8836989A JPH02269228A (en) | 1989-04-07 | 1989-04-07 | Structure for retaining wall and construction method for retaining wall |
Publications (1)
Publication Number | Publication Date |
---|---|
JPH02269228A true JPH02269228A (en) | 1990-11-02 |
Family
ID=13940880
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP8836989A Pending JPH02269228A (en) | 1989-04-07 | 1989-04-07 | Structure for retaining wall and construction method for retaining wall |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPH02269228A (en) |
Cited By (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH02300421A (en) * | 1989-05-12 | 1990-12-12 | Fuji Shoji:Kk | Sheathing block |
JP2015063843A (en) * | 2013-09-25 | 2015-04-09 | 鹿島建設株式会社 | Retaining wall of reinforced concrete |
JP2017155525A (en) * | 2016-03-03 | 2017-09-07 | 中村物産有限会社 | Retaining wall structure |
JP2018080485A (en) * | 2016-11-15 | 2018-05-24 | 株式会社アスカ設計 | Retaining wall structure for energy station and construction method of retaining wall structure |
JP6986803B1 (en) * | 2021-07-21 | 2021-12-22 | 株式会社ピーエルジー | Retaining wall structure and how to build a retaining wall |
Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS6344022A (en) * | 1986-08-12 | 1988-02-25 | Keihan Concrete Kogyo Kk | Concrete block for foamed block structure |
JPH01287316A (en) * | 1988-05-14 | 1989-11-20 | Chugoku Concrete Kogyo Kk | Retaining wall block |
JPH02104823A (en) * | 1988-10-12 | 1990-04-17 | Ohbayashi Corp | Constructing method for retaining wall using artificial lightweight soil |
-
1989
- 1989-04-07 JP JP8836989A patent/JPH02269228A/en active Pending
Patent Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS6344022A (en) * | 1986-08-12 | 1988-02-25 | Keihan Concrete Kogyo Kk | Concrete block for foamed block structure |
JPH01287316A (en) * | 1988-05-14 | 1989-11-20 | Chugoku Concrete Kogyo Kk | Retaining wall block |
JPH02104823A (en) * | 1988-10-12 | 1990-04-17 | Ohbayashi Corp | Constructing method for retaining wall using artificial lightweight soil |
Cited By (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH02300421A (en) * | 1989-05-12 | 1990-12-12 | Fuji Shoji:Kk | Sheathing block |
JP2015063843A (en) * | 2013-09-25 | 2015-04-09 | 鹿島建設株式会社 | Retaining wall of reinforced concrete |
JP2017155525A (en) * | 2016-03-03 | 2017-09-07 | 中村物産有限会社 | Retaining wall structure |
JP2018080485A (en) * | 2016-11-15 | 2018-05-24 | 株式会社アスカ設計 | Retaining wall structure for energy station and construction method of retaining wall structure |
JP6986803B1 (en) * | 2021-07-21 | 2021-12-22 | 株式会社ピーエルジー | Retaining wall structure and how to build a retaining wall |
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