JPH04149313A - Construction method of cast-in-place pile - Google Patents
Construction method of cast-in-place pileInfo
- Publication number
- JPH04149313A JPH04149313A JP27054490A JP27054490A JPH04149313A JP H04149313 A JPH04149313 A JP H04149313A JP 27054490 A JP27054490 A JP 27054490A JP 27054490 A JP27054490 A JP 27054490A JP H04149313 A JPH04149313 A JP H04149313A
- Authority
- JP
- Japan
- Prior art keywords
- bag
- cast
- casing
- concrete
- bag member
- 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.)
- Granted
Links
- 238000010276 construction Methods 0.000 title claims description 10
- 230000003014 reinforcing effect Effects 0.000 claims abstract description 23
- 238000009412 basement excavation Methods 0.000 claims description 8
- 238000000034 method Methods 0.000 abstract description 10
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 abstract description 10
- 239000013505 freshwater Substances 0.000 abstract description 8
- 238000005553 drilling Methods 0.000 abstract description 2
- 229920003051 synthetic elastomer Polymers 0.000 abstract description 2
- 239000012209 synthetic fiber Substances 0.000 abstract description 2
- 229920002994 synthetic fiber Polymers 0.000 abstract description 2
- 239000005061 synthetic rubber Substances 0.000 abstract description 2
- 239000003673 groundwater Substances 0.000 description 8
- 239000004568 cement Substances 0.000 description 6
- 238000011109 contamination Methods 0.000 description 3
- 229910001294 Reinforcing steel Inorganic materials 0.000 description 1
- 229910000831 Steel Inorganic materials 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 239000003795 chemical substances by application Substances 0.000 description 1
- 238000004140 cleaning Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 229910003460 diamond Inorganic materials 0.000 description 1
- 239000010432 diamond Substances 0.000 description 1
- 238000009792 diffusion process Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000011888 foil Substances 0.000 description 1
- 238000005755 formation reaction Methods 0.000 description 1
- 230000002093 peripheral effect Effects 0.000 description 1
- 239000011435 rock Substances 0.000 description 1
- 239000004576 sand Substances 0.000 description 1
- 125000006850 spacer group Chemical group 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
- 239000004575 stone Substances 0.000 description 1
Landscapes
- Piles And Underground Anchors (AREA)
- Air Transport Of Granular Materials (AREA)
Abstract
Description
【発明の詳細な説明】 （産業上の利用分野） 本発明は場所打ち杭構築工法に係るものである。[Detailed description of the invention] (Industrial application field) The present invention relates to a cast-in-place pile construction method.
（従来の技術）
地下水流が速い、砂礫や転石が多い地盤に場所打ち杭を
施工する場合の最大の問題は、逸泥の発生による孔壁の
崩壊と、泥水やセメントペーストの地下水への拡散によ
る地下水汚染である。(Conventional technology) The biggest problem when constructing cast-in-place piles in ground with fast underground water flow and lots of gravel and boulders is collapse of the hole wall due to slippage of mud and diffusion of muddy water and cement paste into the groundwater. This is groundwater contamination due to
（発明が解決しようとする課Ｎ）
従来工法で、場所打ち杭をこのような地盤に施工しよう
とすると、第１９図に示すように地下水流によって、矢
印に示すように杭躯体コンクリート（萄内のセメントペ
ースト（ロ）が洗い流されてしまって地下水中に拡散し
、実質上施工は困難であった。(Problem N that the invention seeks to solve) When attempting to construct cast-in-place piles on such ground using conventional construction methods, as shown in Fig. The cement paste (b) was washed away and spread into the groundwater, making construction virtually difficult.
本発明は前記従来技術の有する問題点に鑑みて提案され
たもので、その目的とする処は、地下水流が速い、砂礫
や転石の多い地盤において、杭躯体コンクリートのセメ
ントペーストが洗い流されてしまうことのない場所打ち
杭構築工法を提供する点にある。The present invention was proposed in view of the problems of the prior art described above, and its purpose is to prevent the cement paste of concrete piles from being washed away in ground where underground water flow is fast and there are many gravels and boulders. The point is to provide a method for constructing cast-in-place piles that is easy to use.
（課題を解決するための手段）
前記の目的を達成するため、本発明に係る場所打ち杭構
築工法によれば、伸縮性を有する円筒状の止水性袋体及
び同袋体内部に配設された鉄筋篭を、地盤中の掘削孔内
に挿入したのち、前記袋体内にコンクリートを打設する
ものである。(Means for Solving the Problem) In order to achieve the above-mentioned object, according to the cast-in-place pile construction method according to the present invention, a cylindrical waterproof bag with elasticity and a water-tight bag disposed inside the bag are provided. After the reinforced steel cage is inserted into an excavated hole in the ground, concrete is poured into the bag.
（作用）
本発明によれば、地盤中の掘削孔内に従来のように直接
鉄筋篭を設置してコンクリートを打設することなく、伸
縮性を有する円筒状の止水性の袋体を使用し、同袋体及
び同袋体内に配設された鉄筋篭を挿入したのち、前記袋
体内に杭騙体コンクリ一［・を打設するようにしたので
、同コンクリートは止水性を有する前記袋体によって包
覆され、従ってセメントペーストが地下水流によって洗
い流されることなく、構造上信鯨性の高い場所打ち杭が
構築され、地下水汚染の問題も生じない。(Function) According to the present invention, an elastic cylindrical water-tight bag is used instead of directly installing a reinforcing bar cage and pouring concrete into an excavation hole in the ground as in the past. After inserting the bag body and the reinforcing bar cage placed inside the bag body, pile deforming concrete is poured into the bag body, so that the concrete has a water-stop property. Therefore, the cement paste will not be washed away by the groundwater flow, making it possible to construct cast-in-place piles with high structural reliability, and there will be no problem of groundwater contamination.
また前記袋体は伸縮性を有するので、杭躯体外周面が地
盤の凹凸に密着するため、杭の周面摩擦が期待できる。Furthermore, since the bag has elasticity, the outer circumferential surface of the pile body comes into close contact with the unevenness of the ground, so friction on the circumferential surface of the pile can be expected.
（実施例） 以下本発明を図示の実施例について説明する。(Example) The present invention will be described below with reference to the illustrated embodiments.
地１（５）内に清水を用いたオールケーシング法によっ
て杭躯体構成用の掘削孔（［３１を施工する。（第１図
参照）
図中（１）はケーシング、（２）は掘削ハケソト、（３
）は岩盤の場合に使用されるダイヤモンドカンタ−であ
る。An excavation hole (31) for constructing the pile structure is constructed using the all-casing method using fresh water in the ground 1 (5). (See Figure 1) In the figure, (1) is the casing, (2) is the excavation hole, ( 3
) is a diamond canter used for rock formations.
次いでバキュームを利用して掘削孔ｆｉ＋の孔内の清掃
を行ない、孔底のスライムを除去する。（第２回参照）
図中（４）はケーシング（１）内の清水、（５）はパキ
ュムボンブ（図示せず）に接続された清掃用パイプであ
る。Next, the inside of the excavated hole fi+ is cleaned using a vacuum to remove the slime at the bottom of the hole. (See Part 2) In the figure, (4) is fresh water inside the casing (1), and (5) is a cleaning pipe connected to a Pacum bomb (not shown).
次いでケーシング（＋１内に合成繊維または合成ゴム等
により構成された、伸縮性を有する止水性袋体（６）を
挿入する。この際、同袋体（６）の先端に重錘用の砕石
（７）を投入しておく、（第３図参照）かくして前記袋
体（６）が着底したのち、同袋体（６）内に注水し、同
袋体（６）とケーシング（１）との間の清水をバキュー
ムを利用して徐々に抜き、前記袋体（６）を膨張せしめ
る。（第４図参照）この際、掘削孔（Ｂｌ内の清水（４
）と前記袋体（６）内の清水（４′）との水圧が釣合っ
ているため、同袋体（６）がケーシング（１）に密着す
ることがない。Next, a stretchable waterproof bag (6) made of synthetic fiber or synthetic rubber is inserted into the casing (+1). At this time, a crushed stone (6) for a weight is inserted at the tip of the bag (6). 7) (see Figure 3) After the bag (6) reaches the bottom, water is poured into the bag (6) and the bag (6) and casing (1) are separated. Using a vacuum, the fresh water between the holes is gradually removed to inflate the bag (6). (See Figure 4) At this time, the fresh water (4
) and the fresh water (4') in the bag (6) are balanced, so the bag (6) does not come into close contact with the casing (1).
次いで前記袋体（６）内に鉄筋篭（８）を挿入する。Next, the reinforcing bar cage (8) is inserted into the bag (6).
（第５図参照）
なお同鉄筋篭（８）の鉄筋先端には、前記袋体（６）を
破らないように、養生キヤ、ブを取付けておく。(See Figure 5) A curing cage is attached to the tip of the reinforcing bars of the reinforcing bar basket (8) to prevent the bag (6) from being torn.
次いで掘削孔（ＢｌＯ孔壁が崩壊する慣れのある場合は
、ケーシング（１）を引き上げながら、前記袋体（６）
に挿入されたトレミー管（９）を介して、同袋体（６）
の底部より徐々にコンクリ−日１０）を打設する。Next, while pulling up the casing (1) in the excavation hole (if the BIO hole wall is used to collapse, the bag body (6)
The bag body (6) is inserted through the tremie tube (9) inserted into the bag body (6).
10) Concrete is gradually poured from the bottom of the container.
このとき、前記袋体（６）内のコンクリート（１０）の
側圧によって、同袋体（６）は掘削孔壁に密着する。At this time, the bag (6) comes into close contact with the wall of the excavation hole due to the lateral pressure of the concrete (10) inside the bag (6).
（第６図参照）
なお同孔壁の崩壊の惧れがない場合には、鉄筋篭入り袋
体（６）が共上がりしないように、ケーシング（１）を
緩徐に引き抜き、同ケーシング（１）が引き抜けたらト
レミー管（９）を前記袋体（６）内に挿入して、底部よ
り徐々にコンクリート（１０）を打設していく。(See Figure 6) If there is no risk of the wall of the hole collapsing, slowly pull out the casing (1) so that the bag containing the reinforcing steel cage (6) does not come up. When the bag is pulled out, the tremie pipe (9) is inserted into the bag (6), and concrete (10) is gradually poured from the bottom.
かくしてコンクリート（１０）を余盛り位置まで打設し
て全工程を完了する。（第７図参照）なお杭の周面摩擦
が期待できる地盤においては、伸縮性を有する前記袋体
（６）が掘削孔（［３１周面の凹凸に密着するため、杭
の周面摩擦はそのまま期待できる。In this way, the concrete (10) is poured to the overfill position and the entire process is completed. (See Figure 7) In the ground where friction on the circumferential surface of the pile can be expected, the elastic bag (6) is in close contact with the irregularities on the circumferential surface of the excavation hole ([31], so the friction on the circumferential surface of the pile is You can expect it as is.
前記実施例の方法によって構築された場所打ち杭は、コ
ンクリート杭躯体の外周が止水性袋体で包覆されている
ので、地下水の流速が大きい、砂礫や転石を含む地盤に
おいても、杭躯体からセメントペーストが流出すること
なく、信顛度の高い杭が構築され、また泥水を使用せず
にコンクリートは前記袋体（６）内に打設されるので、
地下水の汚染を生起することがない。In the cast-in-place pile constructed by the method of the above example, the outer periphery of the concrete pile body is covered with a waterproof bag, so even in ground containing sand and gravel or boulders where the flow rate of groundwater is high, there is no leakage from the pile body. A highly reliable pile is constructed without the cement paste flowing out, and concrete is poured into the bag body (6) without using muddy water.
No contamination of groundwater will occur.
なお伏流水が先端支持層にない場合には、袋底部がなく
ても施工可能である。Note that if there is no underground water in the tip support layer, construction can be carried out without the bag bottom.
第８図乃至第１１図は本発明の他の実施例を示し、地上
で鉄筋篭（８）を組立て、鉄筋先端部に袋体（６）を破
らないための養生キャンプを取付け、地上で前記袋体（
６）内に鉄筋篭（８）を挿入して袋詰め鉄筋篭を製作す
る。この際、クレーンで鉄筋篭（８）を懸吊した状態で
、前記袋体（６）を下部より嵌装して徐々に引き上げる
。8 to 11 show another embodiment of the present invention, in which a reinforcing bar cage (8) is assembled on the ground, a curing camp is attached to the tip of the reinforcing bars to prevent the bag body (6) from breaking, and Bag (
6) Insert the reinforcing bar cage (8) inside to produce a bagged reinforcing bar basket. At this time, with the reinforcing cage (8) suspended by a crane, the bag (6) is fitted from below and gradually pulled up.
前記実施例と同様にオールケーシング法式で削孔し、鉄
筋篭（８）入りの袋体（６）内部に清水（４′）を注水
するとともに、ケーシング（１）内の清水（４）を徐々
に抜きながら、鉄筋篭入り袋体（６）を掘削孔（Ｂｌ内
に挿入する。（第８図参照）
第９図に示す如く鉄筋篭入り袋体（６）が着底すると、
ケーシング（１）を徐々に引き抜き、前記鉄筋篭入り袋
体（６）内にトレミー管（９）を挿入してコンクリ−ト
（１０）を打設し、（第１０図参照）同コンクリート（
１０）を余盛り位置まで打設して全工程を完了する。（
第１１図参照）
第１２図及び第１３図は前記各実施例の方法によって構
築された場所打ち杭を示し、図中（１１）は鉄筋篭（８
）と前記袋体（６）とを所定間隔に保持するため、鉄筋
篭（８）に取付けられたスペーサー、（１２）は拡底部
である。As in the previous example, holes are drilled using the all-casing method, and fresh water (4') is poured into the bag body (6) containing the reinforcing bar cage (8), and the fresh water (4) inside the casing (1) is gradually removed. While pulling it out, insert the bag with the reinforcing bar cage (6) into the excavation hole (Bl. (See Fig. 8). When the bag with the reinforcing bar cage (6) reaches the bottom as shown in Fig. 9,
Gradually pull out the casing (1), insert the tremie pipe (9) into the reinforced cage-containing bag (6), and pour the concrete (10) (see Figure 10).
10) is poured to the excess fill position to complete the entire process. (
(See Fig. 11) Fig. 12 and Fig. 13 show cast-in-place piles constructed by the method of each of the above embodiments, and (11) in the figure shows a reinforcing bar cage (8).
) and the bag (6) at a predetermined distance, a spacer (12) attached to the reinforcing cage (8) is an enlarged bottom part.
第１４図及び第１５図は本発明の更に他の実施例を示し
、地盤内の中間層に地下水流があるとき、同中間層部分
にのみ、前記袋体（６ンの底部を除去した形状の帯状部
片（６′）によって杭一体を包覆したもので、図中、前
記各実施例と均等部分には同一符号が附されている。FIG. 14 and FIG. 15 show still another embodiment of the present invention, in which when there is a groundwater flow in the middle layer in the ground, the bag (with the bottom part removed) is applied only to the middle layer. The pile is integrally covered by a band-like piece (6'), and in the figure, the same reference numerals are given to the same parts as those of the above-mentioned embodiments.
第１６図乃至第１８図は前記帯状部片（６′）を鉄筋篭
（８）の中間部に取付ける工程を示し、鉄筋篭（８）を
組み、（第１６図参照）
次いで同鉄筋篭（８）における地下水流のある中間部に
防水シー） （１３）を巻着し、（第１７図参照）同防
水シー） （１３）の対向端部間を第１８図の（１４）
に示す如く溶着するものである。Figures 16 to 18 show the process of attaching the strip (6') to the middle part of the reinforcing bar cage (8), assembling the reinforcing bar cage (8) (see Fig. 16), then attaching the reinforcing bar cage ( (14) in Figure 18 is wrapped between the opposite ends of the same waterproof sheath (13) (see Figure 17).
It is welded as shown in the figure.
（発明の効果）
本発明に係る場所打ち杭工法は前記したように、伸縮性
を有する円筒状の止水性袋体及び同袋体内部に配設され
た鉄筋篭を地盤中の掘削孔内に挿入したのち、前記袋体
内に杭躯体コンクリートを打設するようにしたので、場
所打ち杭躯体コンクリートのセメントペーストが地下水
流によって洗い流されることがなく、構造上信転性の高
い場所打ち杭が構築され、また地下水汚染の問題も生し
ないし、更にまた杭の周辺摩擦が期待できる地盤におい
ては、前記袋体が伸縮性を有するため、同袋体内に打設
された杭躯体コンクリートの側圧によって、杭周面が地
盤の凹凸に密着するため、杭の外周Ｗｌ擦はそのまま期
待できる。(Effects of the Invention) As described above, the cast-in-place pile construction method according to the present invention uses a stretchable cylindrical water-stopping bag and a reinforcing bar cage placed inside the bag in an excavated hole in the ground. After inserting the concrete pile, the concrete pile is placed inside the bag, so the cement paste of the concrete cast-in-place pile is not washed away by underground water flow, and a cast-in-place pile with high structural reliability is constructed. Furthermore, in the ground where friction around the pile can be expected, since the bag has elasticity, the lateral pressure of the pile frame concrete cast inside the bag can Since the pile peripheral surface is in close contact with the irregularities of the ground, the outer circumference Wl of the pile can be expected to rub as is.
第１図乃至第７図は本発明に係る場所打ち杭構築工法の
一実施例の工程を示す縦断面図、第８図乃至第１１図は
本発明の他の実施例の工程を示す縦断面図、第１２図及
び第１３図は夫々本発明の実施例によって構築された場
所打ち杭の縦断面図並に横断平面図、第１４図及び第１
５図は本発明の更に他の実施例によって構築された場所
打ち杭の縦断面図並に横断平面図、第１６図乃至第１８
図は鉄筋篭に中間防水帯を装着する工程を示す説明図、
第１９図は従来工法の実施状況を示す縦断面図である。
囚・・・地盤、 ■・・・掘削孔、ｆｌ）・・
・ケーシング、 （４）（４’ｌ ・・・清水、（６
）−・・袋体、 （８）・・・鉄筋篭、（９）
−）レミー管、 （１０）−・・コンクリート。
代理人 弁理士 岡 本 重 文
外１名
第８図
第９図
第１０図
第１１図
コンクリート
箔１９図FIGS. 1 to 7 are longitudinal cross-sectional views showing the steps of one embodiment of the cast-in-place pile construction method according to the present invention, and FIGS. 8 to 11 are longitudinal cross-sectional views showing the steps of another embodiment of the present invention. 12 and 13 are a vertical cross-sectional view and a cross-sectional plan view, respectively, of a cast-in-place pile constructed according to an embodiment of the present invention, and FIG. 14 and FIG.
5 is a vertical cross-sectional view and a cross-sectional plan view of a cast-in-place pile constructed according to still another embodiment of the present invention, and FIGS. 16 to 18
The figure is an explanatory diagram showing the process of attaching the intermediate waterproof belt to the reinforcing bar cage.
FIG. 19 is a longitudinal sectional view showing the state of implementation of the conventional construction method. Prisoner...ground, ■...drilling hole, fl)...
・Casing, (4) (4'l...Shimizu, (6
)--Bag body, (8)...Reinforced cage, (9)
-) Remy tube, (10) - concrete. Agent: Patent attorney Shige Okamoto (1 person) Fig. 8 Fig. 9 Fig. 10 Fig. 11 Fig. 19 Concrete foil
Claims (1)
設された鉄筋篭を、地盤中の掘削孔内に挿入したのち、
前記袋体内にコンクリートを打設することを特徴とする
場所打ち杭構築工法。After inserting a stretchable cylindrical water-stop bag and a reinforcing bar cage placed inside the bag into an excavation hole in the ground,
A cast-in-place pile construction method characterized by pouring concrete into the bag.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP27054490A JP2844016B2 (en) | 1990-10-11 | 1990-10-11 | Cast-in-place pile construction method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP27054490A JP2844016B2 (en) | 1990-10-11 | 1990-10-11 | Cast-in-place pile construction method |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH04149313A true JPH04149313A (en) | 1992-05-22 |
| JP2844016B2 JP2844016B2 (en) | 1999-01-06 |
Family
ID=17487671
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP27054490A Expired - Lifetime JP2844016B2 (en) | 1990-10-11 | 1990-10-11 | Cast-in-place pile construction method |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2844016B2 (en) |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0635326U (en) * | 1992-10-21 | 1994-05-10 | 基浩 東峰 | An outflow prevention device for ready-mixed concrete used for on-site pile driving |
| JPH0711625A (en) * | 1993-06-25 | 1995-01-13 | Kajima Corp | Side wall protection method in excavated hole |
| WO1996018001A1 (en) * | 1994-12-05 | 1996-06-13 | Shogen Okawa | Pile head treating tool for cast-in-place pile, pile head treating method, and cast-in-place piling method |
| JP2017082513A (en) * | 2015-10-29 | 2017-05-18 | 大亜ソイル株式会社 | Cast-in-place concrete pile and construction method thereof |
| CN111924446A (en) * | 2020-07-27 | 2020-11-13 | 山东大学 | Segmented reinforcement cage transportation equipment and method |
| JP2021042551A (en) * | 2019-09-10 | 2021-03-18 | 株式会社Ｅ・Ｃ・Ｓ | Cutoff material using for cast-in-place pile method, and core material therewith, and cast-in-place construction method |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110965398B (en) * | 2019-11-25 | 2021-04-06 | 中南大学 | Expansive soil foundation structure containing ballastless track roadbed and construction method |
-
1990
- 1990-10-11 JP JP27054490A patent/JP2844016B2/en not_active Expired - Lifetime
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0635326U (en) * | 1992-10-21 | 1994-05-10 | 基浩 東峰 | An outflow prevention device for ready-mixed concrete used for on-site pile driving |
| JPH0711625A (en) * | 1993-06-25 | 1995-01-13 | Kajima Corp | Side wall protection method in excavated hole |
| WO1996018001A1 (en) * | 1994-12-05 | 1996-06-13 | Shogen Okawa | Pile head treating tool for cast-in-place pile, pile head treating method, and cast-in-place piling method |
| KR100428018B1 (en) * | 1994-12-05 | 2004-09-10 | 쇼겐 오가와 | File head treatment of concrete mortar, file head treatment method, and mortar concrete mortar method |
| JP2017082513A (en) * | 2015-10-29 | 2017-05-18 | 大亜ソイル株式会社 | Cast-in-place concrete pile and construction method thereof |
| JP2021042551A (en) * | 2019-09-10 | 2021-03-18 | 株式会社Ｅ・Ｃ・Ｓ | Cutoff material using for cast-in-place pile method, and core material therewith, and cast-in-place construction method |
| CN111924446A (en) * | 2020-07-27 | 2020-11-13 | 山东大学 | Segmented reinforcement cage transportation equipment and method |
Also Published As
| Publication number | Publication date |
|---|---|
| JP2844016B2 (en) | 1999-01-06 |
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