JP4186069B2 - Construction method of compacted hardened pile - Google Patents
Construction method of compacted hardened pile Download PDFInfo
- Publication number
- JP4186069B2 JP4186069B2 JP2004077149A JP2004077149A JP4186069B2 JP 4186069 B2 JP4186069 B2 JP 4186069B2 JP 2004077149 A JP2004077149 A JP 2004077149A JP 2004077149 A JP2004077149 A JP 2004077149A JP 4186069 B2 JP4186069 B2 JP 4186069B2
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- Japan
- Prior art keywords
- hollow tube
- coarse aggregate
- hardened
- compacted
- coarse
- 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.)
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Links
- 238000010276 construction Methods 0.000 title claims description 16
- 239000000463 material Substances 0.000 claims description 17
- 230000002093 peripheral effect Effects 0.000 claims description 7
- 239000003595 mist Substances 0.000 claims description 6
- 239000004575 stone Substances 0.000 claims description 6
- 230000000149 penetrating effect Effects 0.000 claims description 5
- 238000007788 roughening Methods 0.000 claims 2
- 238000007599 discharging Methods 0.000 claims 1
- 239000004848 polyfunctional curative Substances 0.000 description 17
- 238000002347 injection Methods 0.000 description 9
- 239000007924 injection Substances 0.000 description 9
- 238000000605 extraction Methods 0.000 description 3
- 238000002156 mixing Methods 0.000 description 3
- 230000035515 penetration Effects 0.000 description 3
- 239000004568 cement Substances 0.000 description 2
- 230000002265 prevention Effects 0.000 description 2
- 239000002002 slurry Substances 0.000 description 2
- 238000005056 compaction Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000000034 method 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
- 239000004576 sand Substances 0.000 description 1
Images
Landscapes
- Piles And Underground Anchors (AREA)
- Investigation Of Foundation Soil And Reinforcement Of Foundation Soil By Compacting Or Drainage (AREA)
- Consolidation Of Soil By Introduction Of Solidifying Substances Into Soil (AREA)
Description
本発明は、周面摩擦が大きい締固め硬化杭を造成するための締固め硬化杭の造成工法に関するものである。 The present invention relates to a construction method for a compacted and hardened pile for creating a compacted and hardened pile having a large peripheral friction.
先端に硬化材供給用パイプの吐出口を具えた中空管を地盤の所定深度まで貫入した後、所定長さ引き抜き、この引き抜きの前後に中空管内に所定量の砂、砂利等の骨材を投入して、この骨材を中空管の引き抜き跡に排出するとともに、中空管を引き抜きながら、もしくは、中空管を引き抜いた後に、排出された骨材に前記吐出口からセメントミルク等のスラリー状硬化材を噴射し、それから、中空管を再貫入して、スラリー状硬化材が混入された骨材を締固め、以後、前述の中空管を所定長さ引き抜く工程以下を繰り返して、地中に高強度の締固め硬化杭を造成することは従来公知である（例えば、特公平６−３０１４号公報参照）。 After a hollow tube having a discharge port of a hardener supply pipe at the tip penetrates to a predetermined depth of the ground, a predetermined length is pulled out, and a predetermined amount of aggregate such as sand and gravel is put into the hollow tube before and after this extraction. The aggregate is discharged to the extraction trace of the hollow tube, and while the hollow tube is pulled out or after the hollow tube is pulled out, the discharged aggregate is made of cement milk or the like from the discharge port. The slurry-like hardener is sprayed, and then the hollow tube is re-penetrated and the aggregate mixed with the slurry-like hardener is compacted. Thereafter, the above-described steps of drawing out the hollow tube by a predetermined length are repeated. It has been conventionally known to form a high-strength compacted and hardened pile in the ground (for example, see Japanese Patent Publication No. 6-3014).
前述の公知技術は、強度が大で、しかも均一である締固め硬化杭の造成を意図しているものであるが、本発明は、強度とともに、周面の摩擦抵抗も大きい締固め硬化杭を造成する工法を提供することを課題としている。 The above-mentioned known technology is intended to create a compacted and hardened pile with high strength and uniformity, but the present invention provides a compacted and hardened pile with high strength and high frictional resistance on the peripheral surface. The issue is to provide a construction method.
前記課題を解決するために、請求項１に係る発明の工法では、中空管を地盤の所定深度まで貫入した後、中空管内に、所定量の砂利、砕石等の粗骨材を投入するとともに、粗骨材間の空隙の容積にほぼ等しい量のスラリー状の硬化材を圧縮空気と混合して霧状に噴射して、粗骨材間に硬化材を混入させてから、中空管を所定長さ引き抜いて、硬化材が混入された粗骨材を中空管の引き抜き跡に排出し、それから、中空管を再貫入して中空管の下方の粗骨材を締固め、以後、前述の粗骨材の投入以下の操作を繰り返すようにしている。 In order to solve the above problem, in the construction method of the invention according to claim 1, after penetrating the hollow tube to a predetermined depth of the ground, a predetermined amount of coarse aggregate such as gravel and crushed stone is introduced into the hollow tube. Then, a slurry-like hardener in an amount approximately equal to the volume of the gap between the coarse aggregates is mixed with compressed air and sprayed in the form of a mist to mix the hardener between the coarse aggregates. Pull out the specified length, discharge the coarse aggregate mixed with the hardener to the trace of the hollow tube, then re-penetrate the hollow tube and compact the coarse aggregate below the hollow tube. The above-described operations after the coarse aggregate charging are repeated.
また、請求項２に係る発明の工法では、中空管を地盤の所定深度まで貫入した後、中空管内に、所定量の砂利、砕石等の粗骨材を投入するとともに、粗骨材間の空隙の容積にほぼ等しい量のスラリー状の硬化材を圧縮空気と混合して霧状に噴射して、粗骨材間に硬化材を混入させつつ、中空管を所定長さ引き抜いて、硬化材が混入された粗骨材を中空管の引き抜き跡に排出し、それから、中空管を再貫入して中空管の下方の粗骨材を締固め、以後、前述の粗骨材の投入以下の操作を繰り返すようにしている。 Moreover, in the construction method of the invention according to claim 2, after inserting the hollow tube to a predetermined depth of the ground, a predetermined amount of coarse aggregate such as gravel and crushed stone is introduced into the hollow tube, and between the coarse aggregates An amount of slurry-like hardener approximately equal to the volume of the gap is mixed with compressed air and sprayed in a mist form, mixing the hardener between the coarse aggregates, pulling out the hollow tube for a predetermined length, and hardening The coarse aggregate mixed with the material is discharged to the trace of the hollow tube, and then the hollow tube is re-penetrated to compact the coarse aggregate below the hollow tube. The following operations are repeated.
請求項１に係る発明の工法と請求項２に係る発明の工法では、中空管内に、所定量の砂利、砕石等の粗骨材を投入するとともに、粗骨材間の空隙の容積にほぼ等しい量のスラリー状の硬化材を圧縮空気と混合して霧状に噴射して、粗骨材間に硬化材を混入させているので、硬化材が粗骨材間の間隙に過不足なく均等に行き渡り、比較的少量の硬化材で杭の強度が確保されるとともに、中空管の再貫入によって締め固められた粗骨材が凹凸状に地盤に食い込んで、杭の周面が粗になり、摩擦抵抗が大になる。 In the construction method of the invention according to claim 1 and the construction method of the invention according to claim 2, a predetermined amount of coarse aggregate such as gravel and crushed stone is introduced into the hollow tube, and is substantially equal to the volume of the gap between the coarse aggregates. The amount of slurry-like hardened material is mixed with compressed air and sprayed in the form of a mist, so that the hardened material is mixed between the coarse aggregates. Spreading, the strength of the pile is secured with a relatively small amount of hardened material, and the coarse aggregate compacted by re-penetration of the hollow tube bites into the ground in an uneven shape, and the peripheral surface of the pile becomes rough, Increases frictional resistance.
請求項１に係る発明の工法の一実施態様を図面に基づいて説明すると、図１において、１は本発明の工法の実施に用いられる中空管、２は中空管１の上端に設置された振動式等の貫入機、３は貫入機２を吊り下げるワイヤ、４は中空管１の上端部に取り付けられた粗骨材投入用のホッパ、５は中空管１の下端に設けられた開閉弁、６は中空管１の内部の下端から所定高さ位置に設けられた硬化材噴射装置である。 An embodiment of the construction method of the invention according to claim 1 will be described with reference to the drawings. In FIG. 1, 1 is a hollow tube used for carrying out the construction method of the present invention, and 2 is installed at the upper end of the hollow tube 1. A vibration type penetrating machine, 3 is a wire for suspending the penetrating machine 2, 4 is a coarse aggregate charging hopper attached to the upper end of the hollow tube 1, and 5 is provided at the lower end of the hollow tube 1. The open /
請求項１に係る発明の工法では、先ず、中空管１をワイヤ３で地盤の所定地点に吊り下げ（図１のイの状態）、この中空管１を貫入機２により所定深度まで貫入した後（図１のロの状態）、中空管１内にホッパ４を通して所定量の砂利、砕石等の粗骨材７を投入するとともに、この中空管１内に投入された粗骨材７の上面よりも上方位置に設置された硬化材噴射装置６から所定量（中空管１内に投入された粗骨材７間の間隙の容積にほぼ等しい量）のセメントミルク等のスラリー状の硬化材を圧縮空気と混合して霧状に噴射して、粗骨材７間に硬化材を混入させ（図１のハの状態）、それから、中空管１を所定高さ引き抜いて、硬化材が混入された粗骨材７を中空管１の引き抜き跡に排出し（図１のニの状態）、それから、中空管１を再貫入し、中空管１の下方の粗骨材７を締め固めて、締固め硬化杭の最下部８を造成し（図１のホ）、以後、前述の図１のハ、ニ、ホの状態を繰り返し、所定長さの締固め硬化杭（図示しない）を造成する。 In the construction method according to the first aspect of the present invention, first, the hollow tube 1 is hung from a predetermined point on the ground by a wire 3 (the state of A in FIG. 1), and the hollow tube 1 is penetrated to a predetermined depth by the penetrator 2. Then, a predetermined amount of coarse aggregate 7 such as gravel and crushed stone is introduced into the hollow tube 1 through the hopper 4, and the coarse aggregate introduced into the hollow tube 1. A predetermined amount (a quantity approximately equal to the volume of the gap between the coarse aggregates 7 charged in the hollow tube 1) from the
図２は、硬化材噴射装置６の一例を示しており、図中、９は硬化材供給管、１０は圧縮空気供給管、１１は硬化材と圧縮空気の混合室、１２は逆流防止弁であり、図示の硬化材材噴射装置６では、硬化材と圧縮空気が完全独立の２経路で送られ、吐出口で混合されるようになっている。 FIG. 2 shows an example of the
なお、前記説明では、硬化材の噴射が中空管１内に投入された粗骨材７の上方からなされるようになっているが、硬化材の噴射は側方からでもよい。 In the above description, the injection of the hardener is performed from above the coarse aggregate 7 introduced into the hollow tube 1, but the injection of the hardener may be performed from the side.
また、前記実施態様では、中空管１がワイヤ３で吊り下げられ、貫入機２で地中に貫入されるようになっているが、中空管１の貫入方式がこれに限定されないことは言うまでもない。 Moreover, in the said embodiment, although the hollow tube 1 is suspended with the
次に、請求項２に係る発明の工法は、中空管１の引き抜きを硬化材の噴射と並行して行う点で前述の請求項１に係る発明の工法と異なり、その他の点では同じであるので、その実施態様の説明は省略する。 Next, the construction method of the invention according to claim 2 is different from the construction method of the invention according to claim 1 above in that the hollow tube 1 is pulled out in parallel with the injection of the hardener, and is otherwise the same. Therefore, the description of the embodiment is omitted.
１ 中空管、２ 貫入機、３ ワイヤ、４ ホッパ、５ 先端弁、６ 硬化材噴射装置、７ 粗骨材、８ 締固め硬化杭の最下部、９ 硬化材供給管、１０ 圧縮空気供給管、１１ 混合室、１２ 逆流防止弁。 DESCRIPTION OF SYMBOLS 1 Hollow pipe, 2 Penetration machine, 3 wire, 4 hopper, 5 tip valve, 6 Hardening material injection apparatus, 7 Coarse aggregate, 8 Bottom part of compaction hardening pile, 9 Hardening material supply pipe, 10 Compressed air supply pipe , 11 Mixing chamber, 12 Backflow prevention valve.
Claims (2)
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2004077149A JP4186069B2 (en) | 2004-02-20 | 2004-02-20 | Construction method of compacted hardened pile |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2004077149A JP4186069B2 (en) | 2004-02-20 | 2004-02-20 | Construction method of compacted hardened pile |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JP2005232944A JP2005232944A (en) | 2005-09-02 |
| JP4186069B2 true JP4186069B2 (en) | 2008-11-26 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP2004077149A Expired - Lifetime JP4186069B2 (en) | 2004-02-20 | 2004-02-20 | Construction method of compacted hardened pile |
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| Country | Link |
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| JP (1) | JP4186069B2 (en) |
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- 2004-02-20 JP JP2004077149A patent/JP4186069B2/en not_active Expired - Lifetime
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