w}h㉠㡔G ⸨ᵉG jznG 㣠⨀㢌G ᵉ⓸䏭㉥ <8 ISSN 1229-2427 (Print) ISSN 2288-646X (Online) http://dx.doi.org/10.7843/kgs.2013.29.12.95 㻤ᛵ㍈■ᙽ㻡䀔ᬄⓀ㍙# # ㆤ29᜔# 12㿀# 2013ᫌ# 12ぜ# pp. 95 G 104
JOURNAL OF THE KOREAN GEOTECHNICAL SOCIETY Vol.29, No.12, December 2013 pp. 95 G 104
SYD⑷⩫# ‿འ# FVJ# ⫷ᰗ⪣# འᜏ㘄⑼
The Strength Characteristics of PVA Fiber Reinforced CSG Materials
ᢷ ឈ ㇳ1 Jin, Guang-Ri ᢷ ᢧ へ2 Kim, Ki-Young
᠃ 䁸 㠏3 Quan, He-Chun ᢷ ᡓ ㅇ4 Kim, Kyu-Won
Abstract
Recently, application of CSG is increasing in various designconstruction projects. At the initial stage of cementation CSG materials show the same mechanical characteristics as soil, however, as the cementation process develops, CSG materials gradually reveal material characteristics of concrete. The hardened CSG manifests elastic behavior such as maximum strength at small strain range and rapid brittle failure. In this research, PVA fiber stiffeners were used in order to: Greduce such brittle behavioral characteristics; Gimprove the relatively weak tension performance of CSG materials. The binding strength between the bed materials and fiber prevents rapid brittle failure and increases tensional strength of fiber reinforced CSG materials.Test results show that fiber reinforcement alone could induce the stress-strain characteristics of CSG materials from brittle failure to ductile failure and also increase the residual strength.
⧟# # # ⴋ
߯Ŗ֨ϯ࣡ঔ०ࢹ(CSG)ÀψڹԺć֨ėقۺڌʼرݓČەɰ. CSGۦΒəąজߣşلęÏڹًॡۺՁ ں҃ۋݓχ֨Âۋąę॥ق˰͆۾ࡓࡾν࣡ۦΒۺՁںьইॠóʽɰ. ąজʽ֨ϯ࣡ঔ०ࢹəۚڹѺέ قԴ߯ʂÌʪÀьইʼČۋśüॢࠄՁࣷĨقʪɵॠəՁۺۍՁݗں̿óʽɰ. ٍ҆ĵقԴəۋ͠ॢ
CSGۦΒۆࠄՁäʴՁںٰজॠČԜʂۺڷͿࠄأॢۍۤՁɠںÒԸॠČۙPVA Խڮ҃Ìۦεۺڌॠٕɰ. Խ ڮ҃ÌCSGۦΒəۦॠ֨ॠԜ֨ΒٮԽڮԐۋۆĀ०ͳڷͿԽڮقۍۤͳۋьԦॠيঔ०֨ΒۆۍۤÌʪݒÀ ٮśۚ֟͢ࠄՁࣷĨьԦںѓݓॣսەɰ. ֬ॹĀęԽڮ҃ÌχڷͿʪCSGۦΒۆڿͳ-ѺՁںࠄՁࣷĨقԴ
ٍՁࣷĨͿڮʪॣսەڷ϶, Խڮ҃ÌقۆॢۛΪÌʪݒÀমęεঝۍॣսەؽɰ.
Keywords : CSG (Cemented Sand and Gravel), PVA fiber, Unconfined compressive strength, Splitting tensile strength
1. ⑧# ᮫
CSG(Cemented Sand and Gravel) ėѪڹۦΒۆ०ν
জ, Ժćۆ०νজ, ֨ėۆ०νজε֬ইॠşڦॢԞ ͿڏÒȝۆś՚ՁࢹėѪڷͿՙ͟ۆ֨ϯ࣡͟ڷͿ
ÌʪݒÀٮսՁںঝ҃ॣսەرʆӼχۋ؉ɦ͆
1ⲯ㬦⭪, 㧶ሇ⚲Ⱚ⭪ᆏ╆# ⪊ሆ⭪# (Member, Researcher, Korea Water Resources Corporation)
2ⲯ㬦⭪, 㧶ሇ⚲Ⱚ⭪ᆏ╆# ミⰞ⪊ሆ⭪# (Member, Principal Researcher, Korea Water Resources Corporation)
3⋞㬦⭪, ⶫሇ⪊⅚រ㧳ᇪ#㘺ὃᆏ㧳ᆖ#ⲞⰞႯ╆#(Lecturer, Dept. of Civil Engrg., Yanbian Univ. China, Tel: +86-433-2732267, Fax: +86-433-2436568, [email protected], Corresponding author, ᇪ❺ⲚⰪ)
4⋞㬦⭪, 㧶ሇ⚲Ⱚ⭪ᆏ╆# ⪊ሆ⭪# (Researcher, Korea Water Resources Corporation)
*→# ᘖῒ⩪# រ㧶# 㘺⯲Ḗ# ⭪㧲ᜮ# 㬦⭪⯚# 2014ᗞ# 6⭮# 30Ⱆዦ⹚# ኒ# ᕎ⭃⯞# 㧳㬦ᳶ# ᕎⶖ❶ዊ# ₮ᰧᝢ. ⲚⰪ⯲# ᄚ㘺# ᕎ⭃ᆖ# 㨂፲# ᘖῒ⩪# ᄦⱆ㧲⪆# ṗᝢ.
Copyright © 2013 by the Korean Geotechnical Society
This is an Open-Access article distributed under the terms of the Creative Commons Attribution Non-Commercial License (http://creativecommons.org/licenses/by-nc/3.0) which permits unrestricted non-commercial use, distribution, and reproduction in any medium, provided the original work is properly cited.
<9 䚐ạ㫴ⵌḩ䚍䟀⊰ⱬ㬅G G 㥐Y`ỀG 㥐XY䝬
Wdeoh# 41# Sk|vlfdog|qdplf# fkdudfwhulvwlfv# ri# ulyhu# ehg# pdwhuldo
Ehg# pdwhuldo Vshflilf# judylw| Pd{lpxp# gu|# ghqvlw|# +j2fp6, Rswlpxp# prlvwxuh# frqwhqw# +(, X1V1F1V
Jxqzl# Gdp 519:519< 5144 :13 JZ/# JS
ɰتॢՁࢹĵܓНۆ֨ėėѪڷͿŔটڌʪÀݒÀ ॠČەɰ.
০Ķٽۆąڍ҆ʆ, ҃ܓʆۋٽقԐϸ҃ė, ॠߎ܃ѓė, ؓՁࢹė, ۹ԐʆфԐѓʆŔνČǴݕİ ʂۆ ҃ÌėѪ ˣ ɰتॢ қآͿۆ টڌۋ Àɠॠي
RCC, RCD ėѪęʌҝرҾѕ०ԺćÒȝۆś՚֨
ėėѪڷͿÁġыČەɰ.
֨ϯ࣡̚əԵČঔ०ࢹəۓۙÂۆČĀইԜڷ Ϳæܓ֨ۆߕۺѺজεÇՙ֨ࢅäǣÌʪεݒÀ
֨ࢅдͿşߣݓъфٍأݓъۆ҃Ì, ٬ѹˏړۦ, ʪͿфߏʪۆՁࢹȤъ, şࠗۦΒˣڷͿŔটڌʪÀ
ɰÁজʼČەə߸Ճۋɰ. ۋٮÏڹঔ०ࢹəąজ
ߣşلࢹݗۺۍًॡՁں҃ۋݓχ֨Âۋąę॥
ق˰͆۾ࡓࡾν࣡ۦΒۺՁںьইॠóʽɰ.
ąজʽঔ०ࢹə֨ϯ࣡ۆ॥ڮ͟ق˰͆ۚڹѺέ قԴ߯ʂÌʪÀьইʼČۋśüॢࠄՁࣷĨقʪ ɵॠəՁۺՁݗں̿óʽɰ. ۋ͠ॢۦΒۺՁں
ٰ҃ॠşڦॠيĶǴۆąڍϿ͒ǣ̚əۙÄق
֨ϯ࣡̚əԵČˣęÏڹČĀڮь܃قԽڮ҃Ìۦ εێ܁Ҽڱঔ०ॢ֨ϯ࣡Խڮ҃Ìঔ०ࢹقʂॢٍ
ĵÀটьॠóݕॱʼČەɰ(Cho et al., 1995; Kim et al., 2005; Park et al., 2008). Ķٽۆąڍथࣺۦॠ֨ॹ,
֬ǴCBR֨ॹ, ֬ǴϿ֬ॹ, ێ߹ؓ߹֨ॹ, Ԙ߹֨ॹ, ݔۿۻɳ֨ॹˣںࣀॠيԽڮۆ҃Ìমęεۓݒॠ
ٕɰ(Clough et. al., 1981). ̚ॢࡓࡾν࣡фϿβࢍβ ۆæܓս߹Œَ܃رεڦॢѓ؋ڷͿԽڮٮঔজ܃
ÀێъۺڷͿψۋۺڌʼرݓČەɰ(Grazybowski et al., 1990; Chern et al., 1990; Shah, 1992; Yoon et al., 2004). Won et al.(2004, 2005)ڹԽڮ҃ÌभνϢ֨ϯ
࣡Ͽβࢍβ, ࡓࡾν࣡قʂॢٍĵεࣀॠيߣşս߹
Œَ(ՙՁս߹Œَ)ق ʂॢ ز܃মęε ۓݒॠٕڷ϶, Song et al.(1990)ڹԽڮ҃ÌࢹŒَՁقʂॢٍĵε, Mun et al.(2012)ڹԽڮфঔজ܃εۋڌॢডࢹϿβ
ࢍβæܓս߹ÇՙমęʂॢٍĵεࣀॠيԽڮ҃Ì
ۦΒۆæܓս߹قۆॢŒَÇՙমęεۓݒॢцە ɰ. ॠݓχ, ʂҙқۆۋ͠ॢæܓս߹Œَں܃رॠş
ڦॢşց˞ڹێъ҃ࣀ֨ϯ࣡ࡓࡾν࣡фϿβࢍβ قĶॢʼرۺڌʼČەڷ϶(Mun, 2012) ֨ϯ࣡ঔ०
ࢹˣۺڌقʂॢşցÒьڹ؉ݔйҼॢԜۋɰ.
ێъۺڷͿ ٍأݓъڦق টڌʽ ࢹЀԽڮǣ ٬ѹ
фİʂ˓ړ֨قێ܁ॢѓॳڷͿŖۓʽࢹЀԽڮ əࢹؓقۆॢۍۤͳںьই॥ڷͿ׆ۆݓݓͳں
ݒÌ֨ࢅݓχŖۓѓॳڷͿйǏ͠ݙইԜۋьԦॣ
ÀɠՁۋەɰ. ۋεٰ҃ॠČۙИۚڦͿԶڹɳԽڮ
҃ÌşցقʂॢٍĵÀ۾ݒÀॠČەə߸Ճۋɰ.
ۋٮÏڹɳԽڮۆ०ՁԽڮε߸ÀۺڷͿ֨ϯ
࣡ঔ०ࢹقঔ०ॣąڍԽڮۆۍۤͳۋьʼر֨
ϯ࣡ঔ०ࢹۆࠄՁࣷĨεѓݓॠäǣ۹Çॣսەɰ.
Խڮঔ०ࢹəęԽڮۆυͳقۆ३ڮьʼəԽ ڮۆۍۤͳںۋڌॠيۆًॡۺՁںÒԸ֨ࢇ
ԞͿڏۆ҃Ìࢹۋɰ. ০ɳԽڮ(staple fiber)Ϳ
҃ÌʽԽڮঔ०ࢹəęԽڮۆঔ०ۋڌۋॠČ, Ì ʪۆˣѓՁęŔݓ՚Ձۋڍսॠ϶, ࢹЀԽڮėѪۆ
ɳ۾ۍ҃Ìۦε˰͆ݕۻʼə۠ۦۺۍࠄأϸۋػ əˣۆۤ۾ںÀݓČەɰ(Maher and Ho, 1994).
Խڮঔ०ࢹۆ ۻɳÌʪق ٖॳں й࠘ə ۍۙͿə
ঔ०ʼəۆۓʪқपٮۓۙۆԜˣęÏڹ
ۆėॡۺՁęԽڮۆԜ, ţۋ, ݔą, ۍۤÌʪ,
Ձćս, υćս, Խڮঔ०ڱˣęÏڹԽڮۆНν ۺًॡۺՁфĵ՚ڿͳ, ɰݙԜˣۆٽۺۍۙ
ˣں˞սەɰ(Cho et al., 2002).
ٍ҆ĵقԴə߯ʂÌʪьইۋࠄՁۺۍࣷĨε
҃ۋəCSG ۦΒۆًॡۺՁںÒԸॠČۙ֨ϯ࣡
ٮࠚজՁۋܞڹPolyvinyl alcohol(PVA)ɳԽڮεێ܁
ॢҼڱͿ߯ʂۓąۋ40mmۍCSGۦΒۻߕقИۚ
ڦͿқԓİъॢɰڼė֨ߕε܃ۚॢԽڮ҃Ì
CSG ė֨ߕقʂॢێʹۆێ߹ؓ߹ۍۤÌʪ֨ॹں
֬֨ॠٕڷ϶Խڮ҃ÌقۆॢÌʪՁںԕट҃Čۙ
ॠٕɰ.
2. ☯㤣ཧ⧟
2.1 ☧㤣☧ᰗ
2.1.1 㿏⬸ⵓ⍃#
ٍ҆ĵقԴԐڌॢॠԜۦΒəķڦʆॠԜ֨Βܼ
w}h㉠㡔G ⸨ᵉG jznG 㣠⨀㢌G ᵉ⓸䏭㉥ <:
Ilj1# 41# Ulyhu# ehg# pdwhuldo
Ilj1# 51# Judlq# vl}h# glvwulexwlrq# fxuyh
Ilj1# 61# SYD# ilehu# +UHF48,
Wdeoh# 51# W|shv# dqg# fkdudfwhulvwlfv# ri# SYD# ilehu
SYD Ohqjwk# +pp, Gldphwhu# +,# Whqvloh# vwuhqjwk# +Psd, Vwdqgdug# frqwhqw# +nj2p6,
N0ORQ4333 9/# ;/# 45 44 ;<3 31<
UHFV: 9 5: 4/933 319415
UVF48 ; 73 4/633 3195
UHFV433O 45 433 4/433 46
UIV733 4; 533 4/333 4164313
UI7333 63 993 <33 746
ÂۓʪεʂԜڷͿ֨ॹںսॱॠٕɰ. ۦΒۆʴێՁ
ঝ҃εڦॠيॠԜۦΒεFig. 1ęÏۋ5ɳćͿĵқ ॠيߕÀζॢܼÂۓʪٮʴێॠóۦĵՁॠيě ʹ֨ॹںݕॱॠٕɰ. ֨ॹقۺڌʽॠԜ֨Βəࣀ ێқΪѪԜGW, GPͿқΪʼ϶Ҽܼڹ2.672.69, ߯ ʂæܓнʪ2.11g/cm3, ߯ۺ॥սҼə7.0%ͿǣࢍǮɰ.
Table 1ق֨ॹقۺڌʽॠԜ֨ΒۆНνًॡۺ
ՁںǣࢍǴؽڷ϶Fig. 2قॠԜ֨ΒۆۓʪқपčԸ ںǣࢍǴؽɰ. ֨ॹقۺڌʽॠԜ֨Βۆ߯ʂۓąڹ
40mm ۋɰ.
2.1.2 ⮣㆗# ❫ᚌ㈣# ⚆# ⵓⓏ㴯#
҆֨ॹقԴə߯Ŗ֨ϯ࣡҃ÌۦͿÀۤψۋԐڌ ʼČەəPVAԽڮͿѕ०Ժćε֬֨ॠٕɰ. PVAə
ѩڌ०ՁԽڮܼقԴÌʪٮՁέۋÀۤȭČࠚս Ձ, ǴՁ, ǴَՁ, ǴأुՁˣۋڍսॠş˺Лقԓ غڌՙۦͿԴψۋԐڌʼČەɰ. Choi(2002)ڹPVA Խڮۆݜф܃ܓѓѪقʂॠيۙՃ০ՙÒॠٕڷ
϶, ŔݜڹɰڼęÏɰ. ي͠०ՁԽڮܼقԴࢹЀ ۦΒͿ׆ۆPVA ԽڮəČÌʪ, ČՁέۆڍսॢН νۺՁںÀݓ϶ۋٽقʪَ؋܁Ձ, ǴأुՁ, Ǵ
Ձˣۋڍսॠş˺ЛقԓغڌԽڮͿԴȇνԐڌʼ Čەɰ.
PVAԽڮəǣێ, भνق֟ࢢقҼ३æَս߹έۋ
ǰ؉Դڍսॢ؋܁ՁںǣࢍǴ϶, َ؋܁Ձۋܞڹ
ìڷͿ۞؎Ͳݕͪۋ٣҃ɰʌڎ؋܁ॠɰ. ێъۺڷ ͿPVA ԽڮəԓغڌՙۦͿԴڍսॢۿՁۋÀۤ
ࢀݜۋɰ. PVAԽڮəজॡۺ, НνۺڷͿڍսॢۿ
ՁںÀݓČەڷ϶ۍۤÌʪÀ90150MPa ۋԜڷ ͿǴ؎ࠢνՁۋȭóڅĵʼə֨ϯ࣡ࡓࡾν࣡҃Ìՙ ۦͿۺɾॠɰ. ̚ॢ, PVAԽڮəࡓࡾν࣡ٮϿβࢢ҃
<; 䚐ạ㫴ⵌḩ䚍䟀⊰ⱬ㬅G G 㥐Y`ỀG 㥐XY䝬
Wdeoh# 61# Fkhplfdo# frpsrvlwlrq# ri# fhphqw# qrupdo# sruwodqg# fhphqw
Fhphqw ¬Ƈ¨Ï# +(, Ɗ¨Ï# +(, ſ¨# +(, ƃϨÐ# +(, ¦ƅ¨# +(, ¬ ¨Ð# +(,
Qrupdo# sruwdodqg# fhphqw 54135518 719138 96139913 518618 31<616 413513
+d,# Pl{hu +e,# Pl{lqj
+f,# Frpsdfwlrq# prog +g,# yleudwlqj# frpsdfwlrq +h,# Fxulqj
Ilj1# 71# Pdqxidfwxulqj# surfhvv# ri# vdpsoh
Wdeoh# 71# Vdpsoh# pdqxidfwxulqj# phwkrg
Glylvlrq DVWP# F# 4768 DVWP# F# 44:9
Vl}h# +pp, 쩕483䮄K633 쩕483䮄K633
Frpsdfwlrq#
htxlsphqw
Kdpphu
+5/333# lpsdfw2plq# ⠞Ⅻ, Yheh# wdeoh
Ordg# +nji, Kdpphu# pdvv# G 43䮃315
Wdpslqj# sodwh# @# 613䮃314 <14䮃3158
Wlph# 53# vhf# ?# +zkhq# wkh# pruwdu# irupv# frpsohwho|#
durxqg# wkh# wdpslqj# sodwh,
zkhq# wkh# pruwdu# irupv# frpsohwho|#
durxqg# wkh# vxufkdujh
ÌڌڷͿԴܛ͒ۆԽڮقҼ३ࡓࡾν࣡ٮϿβࢢ՚ق ԴҼӁՁ, қԓՁɠۋڍսॠ϶, ҃ÌՁқۋ̬رǣࡓ
ࡾν࣡фϿβࢢڌԽڮͿȭڹथÀεصČەɰ. Table 2əPVA ԽڮۆܛΪфݜںڅأॢìۋ϶, Fig. 3ڹ
҆֨ॹقԴԐڌʽREC15 PVA ԽڮεǣࢍǶìڷͿ
Խڮݔąڹأ0.1mm, ţۋəأ20mm ܁ʪۋɰ.
CSG ۦΒѕ०قԐڌʽ֨ϯ࣡ə҃ࣀप͔ࣥ˚֨
ϯ࣡ͿԴнʪə3.04g/cm3ۋ϶Table 3ق֨ϯ࣡ۆজ ॡՁқںǣࢍǴؽɰ.
2.2 ၀☧⿿# ⭧⫝̸# # ☧㤣# ὴῠ
Ìʪ֨ॹڌशܵė֨ߕ܃ۚںڦॢۦΒঔ०ڹFig.
4bٮÏۋÂۋ֩İъşεۋڌॠيՙ܁ۆ֨Β, ֨ϯ
࣡, Խڮ҃ÌۦŔνČНں॥ƍ࣊ۓॠəѓ֩ں࢘
ॠٕڷ϶İъʽ֨ΒəFig. 4bęÏۋۦΒқνεѓݓ ॠşڦॠي֨ΒअقԴɰ֨ॢѥۍͳڷͿİъॠٕɰ.
İъٰΒʽ֨ΒεFig. 4dٮÏۋݕʴɰݙşεۋ ڌॠيė֨ߕεՁॠٕɰ. ݕʴɰݙقʂॢ֨ॹѓ
w}h㉠㡔G ⸨ᵉG jznG 㣠⨀㢌G ᵉ⓸䏭㉥ <<
Wdeoh# 81# Uhvxowv# ri# Ilehu0FVJ# frpsdfwlrq# whvwv#
Pl{wxuh# udwlr Pd{lpxp# gu|#
ghqvlw|#
+j2fp6,
Rswlpxp# prlvwxuh#
frqwhqw#
+(, Fhphqw#
+nj2p6,
Ilehu#
+(,
93
3 5159 91;;#
4 5158 9196#
6 5158 9174#
8 5155 91;3#
43 5156 9186#
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3 5159 9183#
4 5156 9186#
6 5157 9135#
8 5156 9194#
43 5157 :176#
Wdeoh# 91# Uhvxowv# ri# Ilehu0FVJ# vwuhqjwk# whvwv
Pl{wxuh# udwlr)Fxulqj# shulrg Xqfrqilqhg# frpsuhvvlrq Whqvloh
Fhphqw#
+nj2p6,
Fxulqj# Shulrg#
+gd|,
Ilehu#
+(,
Pd{1# vwuhqjwk#
+nj2fp5,
Idloxuh# vwudlq#
+(,
Pd{1# vwuhqjwk#
+nj2fp5,
Idloxuh# vwudlq#
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93
:
3 5919:7# 41664# 51:43# 31<6;#
4 661363# 41766# 617;:# 31897#
6 661958# 41658# 61:53# 31:55#
8 63156<# 41;88# 61:7<# 31;9:#
43 661953# 41;5<# 61;6:# 413<:#
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4 85163;# 417:3# 81887# 31::;#
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43 6917;;# 41:33# 61:46# 31<;8#
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3 771<6<# 41587# 431;85# 4134:#
4 861693# 416<6# 431<5:# 413<3#
6 871556# 41997# 431;:6# 41753#
8 851<5<# 417<7# 441<35# 414;;#
43 7;15::# 41:35# 4317<5# 41868#
;3
:
3 6:1:74# 417;<# 61;;9# 31;99#
4 751:6;# 4186<# 816;6# 41655#
6 7;1493# 41898# 914;<# 31<;5#
8 6<1659# 41<77# 719;9# 4144:#
43 6:1389# 41969# 81:33# 41488#
5;
3 881333# 41433# 4419;7# 31;8<#
4 931999# 41:<7# :1677# 31;59#
6 8;1<;4# 41<6;# ;145:# 414<7#
8 7914;9# 5134;# <1993# 31<65#
43 891399# 51355# 4313<:# 41433#
<3
3 :81896# 41356# 441;87# 4154<#
4 :81457# 418;4# 461<56# 4144:#
6 ;41:::# 417:4# 461777# 4163;#
8 :91;9;# 4173;# 441<<5# 41585#
43 9:1884# 41;58# 441<49# 41799#
ѪڹTable 4ٮÏڹASTM C 1435 ѓѪںܓॠٕɰ.
ۋѓѪڹ֨ॹۙÀԐڌॠşڌۋॠČ҃ࣀইۤɰݙ
ۤҼٮҼ֦ॢݕʴęݕफںÀݕɰəۤ۾ۋەڷǣ
ɰݙʪÀইۤ҃ɰɰՙۚóǣࢍǨսەɰ. शܵė
֨ߕЃ˚əۦΒۆՁںČͲॠيݔą150mm, ȭ ۋ300mmۍࡓࡾν࣡शܵЃ˚εԐڌॠٕɰ.
ė֨ߕə ঔ०Ҽѻ ɰݙ֨ॹĀęε şܵڷͿ ɰݙ ʪÀ90% ۋԜۋʼʪՁॠٕɰ(Table 5 ܓ). ė
֨ߕ܃ۚ24֨ÂąęЃ˚εқνॠٕڷ϶أ
22G܁ʪͿ२٣֥ڰتԦں֬֨ॠٕڷ϶, 7ێ, 28ێ
90ێÂۆتԦşÂںäߝێ߹ÌʪٮۍۤÌʪ֨ॹ ں֬֨ॠٕɰ.
3. འᜏ☧㤣
Խڮ҃ÌCSGۆÌʪՁںࣷ؊ॠČۙێ߹ؓ߹Ì ʪ֨ॹęॣَۍۤÌʪ֨ॹ֨ॹں֬֨ॠٕɰ. ֨ॹق
ۺڌʽ֨ϯ࣡॥͟ڹ60, 80kg/m3,Խڮ॥͟ڹ֨ϯ࣡
433 䚐ạ㫴ⵌḩ䚍䟀⊰ⱬ㬅G G 㥐Y`ỀG 㥐XY䝬
Ilj1# 81# Xqfrqilqhg# frpsuhvvlrq# vwuhqjwk# zlwk# ilehu# frqwhqw# yduldwlrq# +93# nj2p6# fhphqw,
ܼ͟ۆ0, 1, 3, 5, 10%ͿĵқॠيتԦێս7ێ, 28ێ, 90ێѻͿÁÁ܃ۚॠٕɰ. ܃ۚʽė֨ߕə߯ʂۦॠ ॠܼ75tonۍʂؓ߹֨ॹşεԐڌॠيێ߹фۍۤ
Ìʪ֨ॹں֬֨ॠٕڷ϶, ֨ॹۺڌۦॠ՚ʪə1mm/min ڷͿॠٕɰ. Table 6ڹێ߹ؓ߹ÌʪфۍۤÌʪ֨ॹ ĀęεǣࢍǶìۋɰ.
3.1 ύ㢴⤛# ᳃# ⫇ム⢠ムའᜏ
֨ϯ࣡॥͟ۋ60kg/m3ٮ80kg/m3ۍąڍقԴۆԽ
ڮ॥͟Ѻজق˰δė֨ߕۆێ߹ؓ߹äʴڹFig. 5, 6قǣࢍǴؽɰ. ֬ॹĀęͿҙࢢ؎սەˢۋИ҃Ì
ԽڮCSGۆąڍ߯ʂÌʪьইśüॢࠄՁࣷĨت Ԝں҃ۋ϶ࣷĨѺέʪԜʂۺڷͿۚڹѺέѩ ڦقԴǣࢍǣČەڼں؎սەɰ. Խڮ҃Ìۆąڍ
Խڮ॥ڮ͟ۋݒÀ॥ق˰͆śüॢࠄՁࣷĨ҃ɰə
ՙՁًٖۆٍՁࣷĨইԜۋǣࢍǣČەڷ϶, ۛΪÌʪ ÀҼİۺࢀѺέѩڦūݓڮݓʼəìں؎սە ɰ. ˰͆ԴCSG ֨ϯ࣡ঔ०ࢹəԽڮ҃Ìۦۆۓۙ
ÂٍĀۚڌڷͿۍॠيࠄՁࣷĨٖॳۋԜɾ০ٰজ
w}h㉠㡔G ⸨ᵉG jznG 㣠⨀㢌G ᵉ⓸䏭㉥ 434 Ilj1# 91# Xqfrqilqhg# frpsuhvvlrq# vwuhqjwk# zlwk# ilehu# frqwhqw# yduldwlrq# +;3# nj2p6# fhphqw,
ʼČەڼں؎սەɰ.
Խڮ॥ڮ͟ق˰δۦͺѻॠܼ-ѺέäʴڷͿҙ ࢢ؎սەˢۋÁۦͺقԴԽڮ҃Ìۦۆঔۓέۋ
ݒÀॣսŔۛΪÌʪʪݒÀॠəąॳ̚ॢʌڎ̤
३ݓəìڷͿǣࢍǮɰ.
Fig. 7ڹ֨ϯ࣡॥͟60kg/m3ٮ80kg/m3قԴۆԽڮ
॥ڮ͟ق˰δۦͺѻێ߹ؓ߹ÌʪۆѺজتԜںʪ
֨ॢìۋɰ. ۻъۺڷͿɳڦ֨ϯ࣡͟قěćػۋʴ ێॢԽڮ॥͟قԴۦͺۋɚرǫق˰͆ÌʪəݒÀ ॠəìڷͿǣࢍǮɰ. ÁÁۆ֨ϯ࣡॥͟قԴۤşێ
߹ؓ߹ÌʪəPVA Խڮۆ॥͟ۆݒÀق˰͆3%قԴ
߯ʂÌʪε҃ۋČԽڮ॥͟ۋ 3%ۋԜقԴəÇՙॠ əąॳںǣࢍǴČەɰ. ۋͿҙࢢęʪॢԽڮ҃Ìڹ
ؓ߹ÌʪۆݒÀε۹ॠ֨࢈սەڼں؎սەɰ.
Fig. 8ڹԽڮ॥͟ق˰δė֨ߕۆ߯ʂێ߹ؓ߹Ìʪ
ьই֨ۆ߹ѺέںǣࢍǶìۋɰ. ۦͺѻ߹Ѻέں
Ҽİॠϸ֨ϯ࣡॥͟60kg/m3ąڍԽڮ॥͟ۆѺজق
˰͆ۦͺ7ێقԴ1.331.85%, 28ێقԴ1.181.37%, ۦ ͺ90ێقԴ1.251.72%ͿǣࢍǮɰ. ֨ϯ࣡॥͟80kg/m3 ąڍۦͺ7ێقԴ1.481.944, ۦͺ28ێقԴ1.10
435 䚐ạ㫴ⵌḩ䚍䟀⊰ⱬ㬅G G 㥐Y`ỀG 㥐XY䝬
# # # # #
Ilj1# :1# FVJ# vdpsoh# xqfrqilqhg# frpsuhvvlrq# vwuhqjwk# zlwk# ilehu# frqwhqw# yduldwlrq# +dyhudjh# ydoxh,
# # # # #
Ilj1# ;1# FVJ# vdpsoh# idloxuh# vwudlq# dw# pd{lpxp# frpsuhvvlrq# vwuhqjwk# zlwk# ilehu# yduldwlrq# +dyhudjh# ydoxh,
# # # # #
Ilj1# <1# Whqvloh# vwuhqjwk# dw# :/# 5;/# <3# fxulqj# gd|v# zlwk# ilehu# frqwhqw# yduldwlrq# +dyhudjh# ydoxh,
2.02%, ۦͺ 90ێقԴ 1.021.83%Ϳ ǣࢍǮɰ. ۦͺ
ѻԽڮ॥͟0%قʂॢࣷĨ֨ѺέۆݒÀҼəԽڮ
॥͟ۆݒÀق˰͆֨ϯ࣡॥͟60kg/m3قԴ7ێۆą ڍ߯ʂ1.39ѕ, 28ێۆąڍ1.43ѕ, 90ێۆąڍ1.36 ѕݒÀॢìڷͿǣࢍǮڷ϶, ֨ϯ࣡॥͟80kg/m3ۆ
7ێۆąڍ߯ʂ1.31ѕ, 28ێۆąڍ1.84ѕ, 90ێۆą ڍ1.79ѕݒÀॠəìڷͿǣࢍǮɰ. Խڮ҃ÌʽCSG ė֨ߕقԴ҃ÌԽڮۆমęεঝۍॣսەؽɰ.
3.2 ύ㢴⤛# ᳃# ⫃⫰འᜏ
Խڮ҃ÌCSGė֨ߕقʂॠيۦͺѻͿॣَۍۤÌ ʪ֨ॹں֬֨ॠٕɰ. Fig. 9ə֨ϯ࣡॥͟60kg/m3, 80kg/m3قԴۆCSGۦΒė֨ߕۆԽڮ॥͟ѻۍۤÌ ʪεǣࢍǶìۋɰ. ĀęÁÁۆ֨ϯ࣡॥͟قԴۍۤ
ÌʪəԽڮۆ॥͟ۆݒÀق˰͆ՙफۆݒÀε҃ۋ Čەݓχ, ۻъۺڷͿäۆŖۿॢÉںǣࢍǴČە
w}h㉠㡔G ⸨ᵉG jznG 㣠⨀㢌G ᵉ⓸䏭㉥ 436
# # # # #
Ilj1# 431# FVJ# vdpsoh# idloxuh# vwudlq# dw# pd{lpxp# whqvloh# vwuhqjwk# zlwk# ilehu# yduldwlrq# +dyhudjh# ydoxh,
ɰ. ۦͺѻԽڮ॥͟0%قʂॢۍۤÌʪݒÇҼε҃
ϸ֨ϯ࣡॥͟60kg/m3ۆąڍ90ێۤşÌʪقԴأ
1.1ѕݒÀॢìڷͿ, ֨ϯ࣡॥͟80kg/m3ۆąڍۤş Ìʪ90ێقԴأ1.2ѕ܁ʪݒÀॢìڷͿǣࢍǮɰ.
Fig. 10ڹÁ֨ϯ࣡॥͟قԴۆԽڮѕ०Ҽق˰δ
߯ʂۍۤÌʪ֨ۆ߹ѺέںǣࢍǶìۋɰ. ۦͺѻ
߹Ѻέڹ֨ϯ࣡॥͟60kg/m3 ąڍԽڮ॥͟ۆѺ জق˰͆ۦͺ7ێقԴ0.941.1%, 28ێقԴ0.73
0.99%, ۦͺ90ێقԴ1.021.54%ͿǣࢍǮڷ϶, ֨ϯ
࣡॥͟80kg/m3ąڍۦͺ7ێقԴ0.871.32%, ۦͺ
28ێقԴ0.831.16%, ۦͺ90ێقԴ1.121.47%Ϳ
ǣࢍǣۦͺۋݒÀॣսԽڮ҃Ìۆ߹ѿέقʂ
ॢমęεঝۍॣսەؽɰ. ۍۤÌʪ֨ॹĀęԽڮ॥
ڮ͟ѺজəۍۤÌʪ҃ɰė֨ߕѺέѺজقʌψ ڹٖॳںй࠘ČەəìڷͿǣࢍǮɰ.
4. # ᮫#
CSGۆÌʪՁڹąজۻԜɾ০ɰδۦΒۺä ʴՁںǣࢍǶɰ. ąজۆCSG ۦΒəѺέ1%
܁ʪقԴäۆՁäʴںьॢśüॢࠄՁࣷĨ εьইॠóʽɰ. ٍ҆ĵقԴəۋ͠ॢäʴՁںٰ
জॠČԜʂۺڷͿࠄأॢۍۤՁɠںÒԸॠşڦॠ ČۙPVA Խڮ҃ÌۦεCSGۦΒقۺڌॠٕڷ϶Խ ڮ҃ÌۦÀCSGۦΒÌʪՁقй࠘əٖॳںԕट
҃ؕɰ. ٍĵĀęε܁νॠϸɰڼęÏɰ.
(1) И҃ÌCSGۆąڍ߯ʂÌʪьইۋśüॢࠄ ՁࣷĨąॳں҃ۋČەڷǣPVAɳԽڮ҃ÌCSG ۦΒəԽڮ॥͟ۋݒÀ॥ق˰ٰ͆χॢࣷĨԜ
ں҃يԽڮ҃ÌۦÀࠄՁࣷĨٖॳںٰজ֨ࢅə
ًॣںॠČەڼں؎սەɰ.
(2) PVAɳԽڮ҃ÌCSGۦΒəɳڦ֨ϯ࣡͟قěć ػۋ تԦێսÀ ݒÀ॥ق ˰͆ ێ߹ؓ߹Ìʪ ф
ۍۤÌʪəݒÀॠəìڷͿǣࢍǮɰ.
(3) ۦͺѻԽڮ॥͟0%قʂॢࣷĨ֨ѺέݒÀҼ əێ߹ؓ߹Ìʪ֨ॹقԴ߯ʂͿ1.8ѕ, ۍۤÌʪ֨
ॹقԴ߯ʂͿ1.4ѕ܁ʪݒÀॠəìڷͿǣࢍǮɰ.
(4) ֨ॹĀęԽڮ҃ÌCSG ۦΒÌʪфѺϿ˃
Խڮ॥ڮڱۆٖॳںыČەڷǣ, ÌʪՁقʂ
ॢٖॳ҃ɰѺՁقʂॢٖॳۋʌࢀìڷͿ
ǣࢍǮɰ.
(5) PVA Խڮ҃Ìۦεটڌॣąڍڿͳ-ѺՁں
ࠄՁࣷĨقԴٍՁࣷĨͿڮʪॣսەڷ϶, ێ܁
ҙқÌʪݒÀমęεьॣսەؽɰ. ێ߹, ۍۤ
Ìʪ҃ÌমęٮٍՁࣷĨεڮʪॣսەəۺ܁
Խڮ҃Ìঔ०ڱڹأ3% ܁ʪۍìڷͿǣࢍǮɰ.
(6) ٍ҆ĵə܁ݓًॠԜ֨ΒقʂॢìےڷͿ߸
ࢍݓً֨Βقʂॢć՚ۺۍٍĵε֬֨ॠي
CSGۦΒۆ Ձق ʂॢ ݓ՚ۺۍ ٍĵÀ ज़څॣ
ìڷͿࣺɳʽɰ.
⾃ါẃ㤗# (References)
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2. Chern, J. C. and Young C. H. (1990), “Study of Factors Influencing Drying Shrinkage of Steel Fiber Reinforced Concrete”, ACI Materials Journal, 87(2), pp.123-129.
3. Cho, Sam-Deok, An, Joo-Hwan, and Lee, Kwang-Wu (2002), “Shear Strength Properties of Fiber-mixed Soil by Big-size Direct Shear
437 䚐ạ㫴ⵌḩ䚍䟀⊰ⱬ㬅G G 㥐Y`ỀG 㥐XY䝬
Tests”, The fall 2002 Geosynthetics Conference, Korean GEOSYNTHETICS SOCIETY, pp.227-234.
4. Cho, Sam-Deok and Kim, Jin-Man (1995), “The Experimental Study on Engineering Properties of Fiber Reinforced Soil”, Geotechnical Engineering, Korean geotechnical society, Vol.11, No.2, pp.107-120.
5. Choi, Soo-Myung (2002), “Introduction and Manufacturing Technology
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6. Clough, G. W., Sitar, N., Bachus, R. C., and Rad, N. S. (1981),
“Cemented sands under static l oading”, J. Geotech. Engrg. Div., ASCE, 107(6), 799-817.
7. Grazybowski, M. and Shah, S. P. (1990), “Shrinkage Cracking ofFiber Reinforced Concrete”, ACI Materials Journal, 87(2), pp.
138-148.
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10. Kim, Young-Su and Kim, Dae-man (2008), “Characteristics of Undrained Cyclic Shear Behavior of Nak-Dong River Sand by Silt Contents”, Journal of the Korean geotechnical society, Vol.24, No.11, pp.79-89.
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using Fiber and Admixture”, Journal of Architectural Institute of Korea, Vol.28, No.8, pp.111-119.
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Received : October 15th, 2013 Revised : December 17th, 2013 Accepted : December 18th, 2013
