根底工程课后习题答案

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⚪ᫀ2-1ᱥᙢᙢ⊤(1)!Ṻ#$2.0m,*+☢ᙠᙢ⊤1mᜐ#;(2)0◞2#$2.0m,345(3)7Ṻ#⛳934:;<+#;<+=>?ᙢ⊤2.0m(@A◖CḄᓻ◅GH᪷
IJ)oLᙢMN᢬JP1mQ#ᙷ
ᨵ,TQ◀V!Ṻᑁᙢ+=Xᑮᙷ
᜜#[\]^V7Ṻ!Ḅ;<+=X_`abGcde(1)ᙢMN᢬J1mQᢝg!Ṻ;<:+⚔☢iḄj⌚l

12-2ᩩ᪷

b=l.8m,IJd=L2m,ᙢM0#ᑁ᥅᪗12kPa,ᙢ+=M
#Ḅᨵᦔ34oᙢM;gᱯfa஺᪷⚪ᩩᵨ¢₞ᳮ¥¦§ᩭᙢMḄ;gᱯ஺=20°,0ªg᪗Ḅ34cdeᵫ,M
i=20°¬⊤2-3,yM
ᙢ+=#ᦑ@ᨵᦔ34#ᦑᙢM;gᱯfa?Mb?b?Md?md?Mcck?0.51?10?l.8?3.06?18.3?1.2?5.66?12?144.29kPa2-3᪷
42m,IJIm஺ᙢM!Ṻ#ᐸ3418kN/m?,᪗´ᐭ¶┴¸ᦪN=21,ᙢM;gᱯfa஺cdeᵫ⚪º»#ᙢMᢝg!Ṻ#᪷᪗´┴¸ᦪN=21¬⊤2-5,fak?250?21?15(340?250)?286kPa

230?15yIJᜧ½d=lm>0.5m,ᦑ[◤ÀÁNÂÃÄ஺¬⊤2-5,;gÃÄÅᦪ?b?3.0,?d?4.4,Æᐭ¦§(2-14)ÃÄḄᙢM;gᱯfk?fak??b?(b?3)??d?m(d?0.5)?286?3.0?18?(3?3)?4.4?18?(l?0.5)?325.6kPa2-4;3ᜋ$240mm,Èᵨ½ᙢ☢᪗>ᜐḄ₹Fk?180kNm,ËᵨẈ᪷
#IJ1.2m஺ᙢMÍÎ0#GG18kNm3,e0?0.9,fak?170kPaẈ᪷
Ḅ
☢4#ÑᢥÓÔᦈÖ^o×?᪷
ᒈ☢ÙÚÛ஺cdey᪷
IJd=1.2m>0.5mᦑ◤ᐜNÂᙢM;gJ4ÃÄ#ᢝgÍÎ0#¬⊤2-5?d?1.0,ÃÄḄᙢM;gfa?fak??d?m(d?0.5)?170?l.0?18??l.2?0.5??182.6kPaÝ᪷
ᜋᩩ᪷
#Æᐭ§2-20ᩩ᪷
4b?

3Fkl80??1.13mfa??Gdl82.6?20?l.212007240?82?60ßᔠáḄâᦪ@b=L2m,Ẉ᪷
ᡠ◤Ḅä▤ᦪn?ᡠᢥÓÔᦈÖ^Ḅ᪷
ç☢᝞Û2-5éM;êḄëì₹Fk?L05MN,᪷
IJ1m,ᙢM!Ṻ#??18kNm3,fak?280kPaí᪷
Ḅ
☢îï஺cdeoy᪷
IJd=l,0m>0.5mᦑ◤ᐜNÂᙢM;gJ4ÃÄ#ᢝg!Ṻ#¬⊤2-5?d?4.4,ÃÄḄᙢM;gfa?fak??d?m(d?0.5)?280?4.4?18??l?0.5??319.6kPaéðñ᪷
Æᐭ¦§2T9,᪷

☢îïb?Fkl050

4??1.87mfa??Gd319.6?20?l@M
îïL9m஺2-6;3áᜋ$240mm,óôᩩ᪷
⚔☢ᜐḄëì₹Fk?150kNmíᜐõᙢo⊤Cᑖ÷᝞ÔÍÎ0#$42.2m,??17m3,e0?0.91,fak?130kPa,Esl?8.IMPa5úûÎ#$41.6m,fak?65kPa,Es2?2.6MPa5ü!ý!Ṻ஺ᙢ+=ᙠúûÎ⚔☢ᜐ஺ᱥÀ᪷
IJþᨵᱯÿ⌕
ὃ⇋Ḅ⚪஺(1)᪷Ḅ☢(ᓷ!"#);(2)&'᪷(☢)*+(,-./₹1ᦔ3456ᔠḄ&'89᪗;6ᔠ8ḄL35@)஺ABC(1)ᙢ4ᢝF!G᪷HIὃ⇋ᑮKL!MN9ᢝF!)Oᔠ“4QH”Ḅ&'SᑣKU!VWXN9ᢝF!ᐸKL!9ᓷ!ᦑ,ᢥᨬ]HIᩩ_᪷HId=0.5m(2)oofg᪷☢hij9d=0.5mᦑ◤⌕ᙢ4l1Fᱯn8HIop,ᓽsfa?fak=130kPaoẈᩩz᪷{ᐭ}~2-20᪷

5Fkl50b???l.25mfa??Gdl30?20?0.5/b=l.3m?CZ?17?2.2?37.4kPaᵫEslEs2?8.2.6?3.1,z?2.2?0.5?1.7m?0.5b,⊤2-723?஺pk?Fkl50??Gd??20?0.5?125.4kPabl.3ᓷ!⚔☢ᜐḄ▬3F9s?Z?b?pk??cd?l.3??125,4?17?0.5???55.4kPab?2ztan?l.3?2?1.7?tan23?faz?fak??d?m(d?z?O.5)?65?1,0?17??2.2?0.5??93.9kPa?Z??CZ?55.4?37.4?92.8kPa?faz?93.9kPa(,)(4)᪷&'⚪ᵨ+ᩩz᪷஺ᵨC20ft?l.10Nmm2,+ᵨHPB235fy?210Nmm᪷HI9o0.5m₹1&'8F?1.35Fk?1.35?150?202.5kN4FPJ?2

6F202.5??155.8kPabl.3᪷Ẉᜋ'#(☢Ḅbl?1??1.3?0.24??0.53m2᪷ᨵᦔhO?pjblO.7ft?155.8?0.53?0.107m?107mm0.7?1100/᪷h?250mm,h0?250?40?5?205mm(?107mm)oM?112pjbl??155.8?0.532?21.9kN?m22M21.9?106As???565mm20.9fyh00.9?210?205*+12@200,As?565mm2,¯!ᵨCIO஺

72-7U+ᑁ³(☢hi9300mmX300mm,Nᵨᙠ᪷⚔☢Ḅ¶·₹1Fk?400kNo¸ᙢ⊤¹Ḅ!º»9s¼½¾ᦣÀ1.0m,??16.4m3ÁÂṺÀ2.6m,??18kNm3,?sat?20kNm3,᪗;Äᐭ"┴ÆᦪN=10ÁXÈᛛÀÊᜧ஺ᙢÌÍᙠᙢ⊤1.6mᜐ஺᡽᪷Ḅ☢hi)&'᪷(☢G*+஺ABC(1)ᙢ4ᢝF!᪷Ïl1Fᩩ_Gᨬ]HIḄ▲ᑴÒᔠ“4QH”Ḅ&'Sᑣ⌱ÔÂÕ!N9ᢝF!(¼½!ÀÖ]l1F×ÁÈᛛX!HIÖᜧMNᢝF!)(2)᪷HIGᙢ4l1Fᱯn8᪷Ï᪷ØÙQHḄSᑣ)ØÙÚÛÌ!,/HId=L0m஺⊤2-5,ÂṺḄ?d=3.0,ᙢ4l1Fᱯn89sfa?fak??d?m(d?0.5)?140?3.0?16.4??1.0?0.5??164.6kPa(3)᪷☢hib?l?Fk400??1.66mfa??Gdl64.6?20?l.0

8

9(6)á*+஺5᪷9âz᪷ᦑ,/M??M???24?pj?l?ac??2b?bc?212?186.9??1.7?0.3???2?1.7?0.3?24?56.5kN?m?As??As?M?56.5?106???842mm20.9fyh00.9?210?355*+H?10ãᔣAs?863.5mm2?842mm2o2-8åæ⚪ç᪷☢z·ᜐèNᵨᨵéêMk?110kN?mo/4ëì91.5,᪷☢hi)&'᪷(☢G*+஺ABC,/᪷HI91.0m,ᵫæ⚪íᙢ4l1Fᱯn8fa?164.6kPa0(1)᪷☢hiὃ⇋ᑮ₹1î·Nᵨ,ﶷ₹1ᡠᑮḄ4☢ñòóᜧ30%f⌱4☢ñsA?l.3

10Fkl.3?400??3.6m2fa??Gdl64.6?20?l.0/ëìn=1.5᪷sb?A3.6??1.55m,/b?l.6m஺nl.5l?nb?1.5?1.6?2.4mFk?Gk?400?20?l.6?2.4?1?476.8kN"#î·se?MkllOl??0.231m??0.4m÷,øFk?Gk476.86Fk?GkA?6e??l??1??476.8?6?0.231????1??1.6?2.4?2.4??195.9kPa?l.2fa?l.2?164.6?197.5kPapkmax?÷,ø

11ফ'#4F&'8Fl.35?400??140.6kPaAl.6?2,4F6M1.35?4006?1.35?110pjmax??2???237.3kPa2blbll.6?2.41.6?2.4pj?pjmin?F6M1.35?4006?l.35?110????43.9kPablbl21.6?2.41.6?2.42üýþ᪷ÿḄI-I☢Ḅ:pj??pjmin?l?ac?pjmax?pjmin??43.9?2.4?0.3??237.3?43.9??152.7kPa212?2.4!3"#$᪷&'()ᵨC20,-./ft?l.10Nmm2,45ᵨHPB2358,fy?210Nmm;᪷&'(h?500mm,h0?500?45?455mmoo=bc?2h0?0.3?2?0.455?1.21m?b?l.6m,ᦑᢥB!2-57"CDᑗFG᝞I!Jpjmax;KBLḄpj"M2??lac??bbc??pjmax????hO?b????hO??22??22??????

122??2.40.3??1.60.3???237.3?????0.455??1.6????0.455??2222999999992?216.9kN0.7?hpft?bc?h0?h0?0.7?1,0?1100??0.3?0.455??0.455?264.5kN?216.9kN!OJ"!4"#$&PQ5RI-1☢/ᢥB!2-65"SGTU:M???1?pjmax?pj???2b?bc???pjmax?pj??b?l?ac?248??12???237.3?152.7???2?1.6?0.3???237.3?152.7??1.6???2.4?0.3?48?137.8kN?mMI137.8?106ASI???1602mm20.9fyh00.9?210?455

13Q4515?12,As?1695mm2?1602mm2,[\]^&_`a஺M??1122pj?b?bc??21?ac???140.6??1.6?0.3??2?2.4?0.3??50.5kN?m2424AS?M?50.5?106???587mm20.9fyh00.9?210?0,455ᢥ᪀⌼⌕fQ513?10,As?1021mm2?587mm2,[\]^&g`a஺᝞Ihijk3-2lmno⍝&☢q(r33m,o⍝AஹBtIḄ.uᑖ`wxrMAt,yz{./|ᛛ/~(2m,Es=4.2MPa,ᐸIr^Bt/{./ᛛ/~(12m,Es=18.4MPa,ᐸIr^஺ᑖSGAஹBtḄᙢ^^ᦪ/SG஺"⚪ↈuᙢ^/OᢥB!10-52"SG஺AtMBtMSGO/./ᐸ^ᦪᜧ஺^ᦪ¡.Ḅ

14|ᨵᐵ/¤¡ᙢ^O.uḄ~(ᨵᐵ஺3-3᝞hL¥¦§L₹©Ḅ45,-.ᩩ«᪷&ḄᢙT(EI=2X106kN-m2,᫡_l=10m,&☢q(b=2m,^ᦪk=4199kN/m3,SG᪷&L¯CḄᢰ(ஹTU±^&஺ெ)´µᐵ¶ᦪ⊤/¸Ax=O.57120,Bx=0.31848,Cx=-0.06574,Dx=0.25273,Al=0.12342,Cl=-0.19853,Dl=-0.03765,El=4.61834,Fir52865஺(1)SG᜜₹©ᙠ»▲_᫡µ½]AஹB¾☢ᡠÀÁḄTU±ÂMaஹVaஹMbஹVbᵫB(10-47)ÄB(10-50)¸M(2)SG᫡ÅÆᩩÇFA=(El+FlDl)Va+X(El-FlAl)Ma-(F1+E1D1)Vb+X(Fl-ElAl)Mb=(4.61834+1.52865X0.03756)X121.2+0.18X(4.61834+1.52865X0.12342)X(-103.9)-(-1,52865-4.61834X0.03756)X(-131.5)+0.18X(-1.52865-4.61834X0.12342)X(-78.7)=282.7kNFB=(Fl+ElDl)Va+È(F1-E1A1)Ma-(E1+F1D1)Vb+ᐭ(El-FlAl)Mb=(-l.52865-4.61834X0.03756)X121.2+0.18X

15(-1.52865-4.61834X0.12342)X(-103.9)-(4.61834+1.52865X0.03756)X(-131.5)+0.18X(4.61834+1.52865X0.12342)X(-78.7)=379.8kN=-396.7kN-m=756.8kN,m(3)SG᪷&L¯CḄᢰ(ஹTU±^&pC=kwC=4199X0.0134=56.3kPa3-4J᎔᫡ËSGÌ⚪3TLḄᩩ«᪷&ᑁ஺(1)ᵨTUᑖQËSGÎ᫡TUÏÐ᪷&ÑᔣḄᙢ^rMbpjÓÔÅTUrMF?16.4?103??376.5KN/m17M21?LÓÔÅTUrM

16112bpjll??376.5?4,52?635.3KN?ml212112bpjl2??376.5?62?1129.5KN?ml212112bpjl0??376.5?12?188.2KN?m22M23?1☢!Ö"×ØÅTUMMil?⁚¯ᑖQᦪÔÅTUᑖQ!kN-m"10188.2188.21.0-635.3-238.20.5635.3101120.5-1129.5-10110.530.5-635.310111.0660.3238.240-188.2-188.21129.51011!2"Î᫡ÂSG1☢ÖḄÂrM

17Vll?bpjl0?376.5?1.0?376.5KNSG1☢ḄÚÛRI?1?11?1??2"2??bpl?l?M?M?376.5?5.5?1011?502???1051.9KNj011??11?2?4.5?2?1☢ÜḄÂMVrl?bpjlO?Rl?376.5?1051.9??675.4KNR"2?bpj?10?ll??Rl?376.5?5.5?1051.9?1018.8kN;23tCrῃÞßMR""2?1121?1?1?2""?2?bpjl2?M2?M3????376.5?6?1011?1011??1162.5KN?2?6?2?R2?R"2?R""2?1018.8?1162.5?2181.3KNV12?R"2?1018.8KNVr2??R"n2??1162.5KNᢥÓLÂràḄᩩÇᩭfÓLᨬᜧãTUMbpj?Rl?376.5x?1043.8x?1043.8/376.5?2.8m

1811ᡠJMlmax?bpjx2?Rl?l.8??376.5?2.82?1011?l.8??344.OKN?m2223tRå/ᨬᜧãTUᙠLæ☢M112M2max??bpjl2?M2???376.5?62?1011??683.2KN?m88ᵫJḄSGOCØᩩ«᪷&ḄTUh±Âh683.2344188.2238.2188.2238.2TUhM(kN,m)101110111018.8376.51162.5675.4ÂhV(kN)

19376.5675.41162.51018.8⊡ᐙ⚪Mëìí«᪷&a]{ឋ.(fk?300kPa)ᙢ^/ᐸïᒈ☢ñ᪀⌼Äñ᪀⌼₹ò᝞h/ñ᪀⌼óòr48480KN,í«᪷&ôòr18000KN,í«᪷&Äëᜓu)ᵨC20,-./ñ᪀⌼᫡ஹ)ᵨC30,-./᪾÷O5mXO5m,᪾÷᫡0.25mX0.60m,fU«᪷&ÑᔣÓLḄ᦮ßTU஺ÏUrM(1)íú᪷&ᑁSG/ᢥÑᔣ᦮ßTûSG/ᵫ☟[⊝ᩩÇSGÓLᨬᜧTMmax?1281.46?6?21?972.61?6?15?900.59?6?9?885.35?6?3?3030?24?6060?18?6060?12?6060?6?22690kN/m(2)SGíú᪷&(EFIF᪷☢ឋIF?1334??12.5?3.55?(12.5?0.8)?2.77?26.3260m?12?EFIF?26.3260EF(3)᪀⌼ᢚ$EBIB&ᔣ()*+,-.ᜋḄ☢ឋIw?2?ᔜ34Ḅ☢ឋIui?Hi?3?ᔜ&᫡Ḅ☢ឋIbi?3?1

20?0.3?2.23?0.5324m4121?0.5?0.53?0.0156m4121?0.3?0.53?0.0094m4120.0156ᔜ34ஹ&᫡Ḅ<Kui?Kli??0.00562.8?᪀⌼ᢚ$Kbi?0.0094?0.00166??Kui?KliEBIB???EbIbi(l?m2)??EwIw2Kbi?Kui?Klil??0.0056?0.005648???7?Eb?0.0094??!??()2?6??2?0.0016?0.0056?0,0056n0.005648??

21?Eb?O.0094??l??(2??Eb?0.53246??2?0.0016?0.0056?4.2658EbD4E᪷ᡠGHḄ᦮JKMFDMEF?EbEMF?MEFIF26.3260EF?22690??19526kN?mEFIF?EBIB26.3260EF?4.2658EbPQR4-1☢TUV400mmḄ*+,-.WXY᫕[ᡭᐭ10m^Ḅ_`a_`b.c[deᙠghᓄḄjbkl஺nopᵨᙠ᫕⚔ḄsᔣtuV800kN,᫕vḄwឋxyV3X104N/mm2o}~$᫕Ḅy஺ெE᫕e᫕[᫕uᶍ[᫕VghᓄḄjbkl[ᐸᶍ஺[᫕vtyᓽV᫕Ḅy[ᓽ4—2ᜩᯠᙢ☢3Ḅ.ᑖ¡¢£¤b¥.,¦ll=3m,qsla=24kPa¬¤.,¦12=6m,qs2a=20kPa¬gḄgṺ[qs3a=30kPa,qpa=2600kPa°±ᵨ☢TUoV350mmX350mmḄ⚜ᑴ᫕[e´☢ᙠᜩᯠᙢ☢µ31.0m,᫕¶ᐭggṺḄ^V1.0m,}·¸ᓫ᫕eºuᱯ¼½஺

22DE4-3ᙢ.¾¿DÀÁ3EV£PÂᩖÄ.,¦1.0m¬PÅV_`[ÆᛛÈ᝱[¦6.5m,qsa=6kPa¬PÊV¤b¥.[¦Ëᜧ,qsa=40kPa¬qpa=1800kPa°◤ÎÂ᪾Ðᑁ4D☢V300mmXo450mmEḄ⚜ᑴ᫕᪷஺4ᙠᙢ☢ᜐḄ₹ºV£sᔣuFk=1850kN,KMk=135kN,m,ÔÕuHk=75kN,Ö⌱⚜ᑴ᫕☢V350mmX350mmo}Î᫕᪷஺D1E·¸ᓫ᫕sᔣeºuᱯ¼½Îe´Ø^L0m,Ú¶ᐭ¤b¥.4.0m,ᑣÜᔠÞᙢßà[áRa=500kNoD2EÖ⌱᫕Ḅ᪷ᦪae´äåM᫕æs=3bp=3X0.35=1.05m,e´TU£1.05+2X0.35=1.75m᫕Ḅ¡èae´Õ☢äå᝞êHT2ᡠì஺ᨚ0Me´¦h=0.8m,Ú⚔ïᐭe´50mm,*+ðñòóᙠ᫕⚔[e´ÎC10,-.õ,ᑣe´ᨵᦔøhO=h-O.05=0.8-0.05=0.75m஺±ᵨC20,-.[HRB335ù*+஺D3E᫕⚔sᔣu$úeºuà$ভ$᫕⚔sᔣuνᡷ◀e´aᐸÄ.ÀþcḄ᫕⚔sᔣuνV:

23(5)ᑗ1)ᑗa0x=525-225-175=125mm,aOy=525-150-175=200mm2)᫕ᑗ01=02=0.525m,alx=aOx=O.125m,aly=aOy=O.2m,ᐭlx=ᐭOx=O.2,ᐭly=ᐭOy=0.27(6)!ᑗ"#$%&☢(ᐭx)ᐭOx=O.2=0.3#+%&☢(Xy=X0y=0.267=0.3(7)-"Mx)ENiyi=2X624.4X0.375=468.3kNm⌱ᵨ16414,As=2460mm2,9:;y<=ᔣᙳᒴAB஺My=ENixi=2X759.4X0.3=455.6kNm⌱ᵨ15614,As=2307mm2,9:;x<=ᔣᙳᒴAB஺EFGHIᶍ஺4—4(1)᝞MINOPQRឋM᫕T9☢IḄl/4o

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