Mô hình trong PLAXIS 3D Foundation

Một phần của tài liệu Phân tích sự phá hoại của cọc bên trong hố đào trong nền đất yếu ở khu vực tp HCM (Trang 95)

Ta ti院n hành xây d詠ng mô hình trong PLAXIS 3D Foundation v噂i chi隠u dài

v逢運ng l亥p"n逢嬰t là 6m, 9m, 12m, 18o"pj逢"Hình 3.39 mô hình c丑e"x "v逢運ng trong

RNCZKU"5F"Hqwpfcvkqp"mjk"vjc{"8鰻i chi隠w"f k"v逢運ng.

Hình 3.39 - O»"j·pj"eがe"x "v⇔ぜpi"e„"ejkzw"u¤w"pi o"x q"8Xv"vjc{"8ごk c+"V⇔ぜpi"ngàm dài 6m; d+"V⇔ぜpi"pi o"f k";m;

3.3.2. Phân tích k院v"sw違"v pj"vqƒp

T瑛 k院t qu違 tính toán c栄a PLAXIS 3D Foundation theo mô hình Hardening

Soil ta v胤 8逢嬰c các bi吋w"8欝 chuy吋n v鵜 ngang l噂n nh医t và mômen u嘘n l噂n nh医t c栄a

c丑c v噂i kho違ng cách c丑e"8院p"v逢運pi"mjƒe"pjcw"mjk"vjc{"8鰻i chi隠u dài v逢運ng l亥p"n逢嬰t là 6m, 9m, 12m, 18m.

V逢挨pi"v詠"ej丑p"j pi"e丑e"pj逢" hình 3.24 8吋"rj¤p"v ej0V瑛"d違pi"m院v"sw違"ejw{吋p" x鵜"e栄c"e丑e"vtqpi"RNCZKU"vc"x胤"8逢嬰e"dk吋w"8欝"ejw{吋p"x鵜"picpi x "oqogpv"w嘘p e栄c" j pi"e丑e"*u嘘"372."375."377."37:+"x噂k"mjq違pi"eƒej"v瑛"vko"e丑e"8院p"v逢運pi"vjgq"v瑛pi ikck"8q衣p"vjk"e»pi0

Ikck"8q衣p"3<"A q"8医v"8院p"ecq"8瓜"-30:o"*uq"x噂k"OAVP+<"

- V瑛 Hình 3.40 vc"vj医{"mjk"n亥p"n逢嬰v"v<pi"ejk隠w"dài v逢運pi"vjgq"eƒe"vt逢運pi"j嬰r"

nêw"vt‒p"vj·"ejw{吋p"x鵜"picpi"e栄c"e丑e"ik違o"t医v"pj臼."eƒe"e丑e"e„"zw"vj院"x鵜"w嘘p"eqpi"x " f鵜ej" ejw{吋p" picpi0" Ikƒ" vt鵜" ejw{吋p" x鵜" e栄c" e丑e" ik違o" mjk" mjq違pi" eƒej" v瑛" e丑e" 8院p" v逢運pi"v<pi0"

Ejw{吋p"x鵜"n噂p"pj医v"e栄c"e丑e"*eơ

Hình 3.40 - Mxv"swV"ejw{あp"xお"picpi"eてc"eがe"xずk"uば"ikc"v<pi"mjqVpi"eƒej"eがe"8xp" v⇔ぜpị"vt⇔ぜpi"jぢr"vjばe"vx."ikck"8qTp"8 q"8xp"-1.8m

Hình 3.41 - Dkあw"8げ"uq"uƒpj"ejw{あp"xお"picpi"nずp"pjXv"eてc"eがe"vtqpi"eƒe"vt⇔ぜpi"jぢr" v<pi"ejkzw"u¤w"v⇔ぜpi"ejhp"mjk"8 q"8Xv"8xp"ecq"8じ"-1,8m

Ikck"8q衣p"2<"A q"8医v"8院p"ecq"8瓜"-50:o"*uq"x噂k"OAVP+<"

- V瑛"Hình 3.41 ta vj医{"mjk"v<pi"ejk隠w"f k"pi o"v逢運pi"n‒p"vj·"ejw{吋p"x鵜"picpi" e栄c"e丑e"ik違o"8ƒpi"m吋0"Eƒe"e丑e"e„"zw"j逢噂pi"d鵜"w嘘p"eqpị"ejw{吋p"x鵜"e栄c"eƒe"e丑e"i亥p" v逢運pi"*e丑e"372."375+"e„"ikƒ"vt鵜"ejw{吋p"x鵜"n噂p"j挨p"eƒe"e丑e"zc"v逢運pi*e丑e"377.37:+

Hình 3.42 - Mxv"swV"ejw{あp"xお"picpi"eてc"eがe"xずk"uば"ikc"v<pi"mjqVpi"eƒej"eがe"8xp" v⇔ぜpị"vt⇔ぜpi"jぢr"vjばe"vx."ikck"8qTp"8 q"8xp"-3.8m

Hình 3.43 - Dkあw"8げ"uq"uƒpj"ejw{あp"xお"picpi"nずp"pjXv"eてc"eがe"vtqpi"eƒe"vt⇔ぜpi"jぢr" v<pi"ejkzw"u¤w"v⇔ぜpi"ejhpmjk"8 q"8Xv"8xp"ecq"8じ"-3,8m

- Tt逢運ng h嬰r"8亥w"mjk"v<pi"ejk隠w"f k"pi o"v逢運ng t瑛 6m lên 9m thì chuy吋n v鵜

ngang c栄a c丑c gi違m, giá tr鵜 chuy吋n v鵜 c栄a c丑c 150 (48,2cm - gi違m 14% so v噂i giá tr鵜

chuy吋n v鵜 c栄c"v逢運ng sâu 6m khi ta xét c丑c g亥p"v逢運ng 150). Khi ta ti院p t映e"v<pi"n‒p"

12m thì chuy吋n v鵜 ngang c栄a c丑c gi違m khá nhi隠u, giá tr鵜 chuy吋n v鵜 c栄a các c丑c 150

(43,7cm - gi違m 24% so v噂i giá tr鵜 chuy吋n v鵜 c栄c"v逢運ng sâu 6m khi ta xét c丑c g亥n

v逢運ng 150)0" V逢挨pi" v詠 v噂i các c丑c 荏 zc" v逢運ng thì giá tr鵜 chuy吋n v鵜 e pi" ik違m.

Vt逢運ng h嬰p cu嘘k"mjk"vc"v<pi chi隠w"f k"pi o"v逢運ng t瑛 6m lên 18m thì ta th医y k院t qu違

chuy吋n v鵜 c栄a nhóm c丑c không sai l羽ch nhi隠u v噂k"vt逢運ng h嬰r"v<pi"ejk隠u dài ngàm

v逢運ng lên 12m.

Mjq違pi"eƒej"v瑛"e丑e"8院p"v逢運pi

Hình 3.44 - Dkあw"8げ"O»ogp"wぐp"nずp"pjXv"eてc"eがe"mjk"vjcy 8ごk"ejkzw"u¤w"pi o" v⇔ぜpi"x q"8Xv."ikck"8qTp"8 q"-3.8m Ej w{ 吋p "x 鵜"n 噂p "p j医 v"e 栄c "e 丑e "*e o +

- A嘘k"x噂k"oqment w嘘p"vtqpi"e丑e"v衣k"x鵜"vt "eƒej"v逢運pi"6.769o *e丑e"372+ khi

v<pi"ejk隠w"u¤w"pi o"v逢運pi"n ";m thì moment w嘘p"e栄c"e丑e là 263,3kN.m n噂p"j挨p" pjk隠w"moment ej嘘pi"w嘘p"e栄c"e丑e"Mcr = 166,8kN.m p‒p"e丑e"e„"mj違"p<pi"d鵜"i«{. Khi

v<pi"ejk隠w"u¤w"pi o"v逢運pi"n "34m, 18m thì o»ogp"w嘘p"n噂p"pj医v"e栄c"e丑e"372"*eƒej" v逢運pi"6.769ơ"x磯p n噂p"j挨p"oqogpv"ej嘘pi"w嘘p Mcr."e丑e"d鵜"p泳v."eƒe"e丑e"e„"x鵜"vt " eƒej"v逢運pi"9.369o"e„"oqogpv"vtqpi"e丑e"z医r"z雨"x噂k"oqogpv"ej嘘pi"w嘘p"Ocr. O員e" f́"vc"v<pi"ejk隠w"u¤w"pi o"v逢運pi"n‒p"18m pj逢pi"ikƒ"vt鵜"oqment w嘘p"vtqpi"e丑e"i亥p" v逢運pi"pj医v"x磯p"t医v"n噂p0"Rj逢挨pi"ƒp"v<pi"ejk隠w"u¤w"pi o"v逢運pi"8吋"ik違o"違pj"j逢荏pi" 8院p"e丑e"d‒p"vtqpi"j嘘"8 q"mj»pi"rj́"j嬰r0

Mxv"nwfp<

̇ Mjk" j嘘" 8 q" u¤w" 3.:o" vj·" xk羽e" v<pi" ejk隠w" u¤w" pi o" v逢運pi" ej逸p" mj»pi" 違pj" j逢荏pi"pjk隠w"8院p"m院v"sw違"ejw{吋p"x鵜"e栄c"e丑e"vtqpi"j嘘"8 q

̇ Khk"v<pi"ejk隠w"u¤w"pi o"v逢運pi"n "8m lên 9m vj·"ejw{吋p"x鵜"picpi"e栄c"e丑e" ik違ọ"ikƒ"vt鵜"ejw{吋p"x鵜"n噂p"pj医v"e栄c"e丑e"eƒej"v逢運pi"6.769"ik違o"36'"uq"x噂k"ikƒ"vt鵜" ejw{吋p"x鵜"e栄c"v逢運pi"u¤w"8o"mjk"vc"zfiv"e丑e"i亥p"v逢運pi0"Mjk"vk院r"v映e"v<pi"ejk隠w"f k" v逢運pi"n‒p"34o"vj·"ejw{吋p"x鵜"picpi"e栄c"e丑e"ik違o"mjƒ"pjk隠w."ikƒ"vt鵜"ejw{吋p"x鵜"picpi" e栄c"e丑e"i亥p"v逢運pi"ik違o"d茨pi"46'"ikƒ"vt鵜"ejw{吋p"x鵜"e栄c"v逢運pi"u¤w"8o"mjk"zfiv"e丑e" i亥p" v逢運pị" v逢挨pi" v詠" ikƒ" vt鵜" ejw{吋p" x鵜" eƒe" e丑e" 荏" zc" v逢運pi" mjq違pi" eƒej" 9.369o" 32.869o"x "35.469o"e pi"ik違o0"Vt逢運pi"j嬰r"ew嘘k"mjk"v<pi"ejk隠w"f k"pi o"v逢運pi" 8o"8院p"3:o"vj·"m院v"sw違"ejw{吋p"x鵜"e栄c"pj„o"e丑e"mj»pi"vjc{"8鰻k"pjk隠w x噂k"vt逢運pg

j嬰r"v<pi"34o"p‒p"vt逢運pi"j嬰r"v逢運pi"f k"3:o"n "mj»pi"mkpj"v院0

̇ Xk羽e"rj¤p"v ej"vt‒p"u胤"ik¿r"ejq"ej¿pi"vc"vk院v"mk羽o"8逢嬰e"mj»pi"ikcp"u穎"f映pi" 8吋"vjk"e»pi"e»pi"vt·pj0"Ej¿pi"vc"e„"vj吋"d嘘"vt "8医v"8 q"x壱v"nk羽w."oƒ{" o„e"vjk院v"d鵜" zwpi"swcpj"j嘘"8 q"o "mj»pi"n o"違pj"j逢荏pi"8院p"e»pi"vt·pj0

M蔭V"NW一P"MK蔭P"PIJ卯 M蔭V"NW一P

1.Khi u穎"f映pi"eƒe"vj»pi"u嘘"8亥w"x q"荏"o映e"30404"8吋"o»"rj臼pi"d茨pi"rj亥p" o隠o"RNCZKU"3D Foundation theo mô hình Hardening Soil vj·"ejq"m院v"sw違"ejw{吋p" x鵜"picpi"x "o»ogp"w嘘p"e栄c"e丑e"z医r"z雨"x噂k"ikƒ"vt鵜"swcp"vt逸e"piq k"jk羽p"vt逢運pi0"Pj逢" x壱{"vc"e„"vj吋"vj医{"vj»pi"u嘘"8亥w"x q"n "j嬰r"n#."swc"8„"e„"vj吋"u穎"f映pi"d瓜"vj»pi"u嘘"p {" 8吋"o荏"t瓜pi"rj¤p"v ej"ejqpj英pi"vt逢運pi"j嬰r"mjƒe0

2.X噂k" n噂r" 8医v" {院w" f {" *d́p" ufiv" Î vt衣pi" vjƒk" ej違{" Î 47ơ" épi" x噂k" u詠" vƒe" 8瓜pi"e栄c"rj映"v違k"mj嘘k"8医v"8逸r"n噂p"*92mP1o2

) eƒej"ofir"j嘘"8 q"mjq違pi"eƒej"32.7o"

và rj映"v違k"fq"oƒ{"vjk"e»pi"x "e»pi"vt·pj"n¤p"e壱p"*32mP1o2+"eƒej"ofir"j嘘"8 q"4.8o"

nên f磯p" 8院p" ejw{吋p" x鵜" oqogpv" w嘘p" vtqpi" e丑e" rjƒv" ukpj" n噂p." x逢嬰v" swƒ" oqogpv" mjƒpi"w嘘p"e栄c"e丑e

3.X́pi"違pj"j逢荏pi"ejw{吋p"x鵜"e栄c"e丑e"d‒p"vtqpi"j嘘"8 q"mjk"rj¤p"v ej"vjgq" o»"j·pj"vj詠e"v院"mjq違pi"7.7J"*J"n "ejk隠w"u¤w"j嘘"8 q+

4.Vi羽e"fk"ejw{吋p"mj嘘k"8医v"8逸r"tc"zc"j嘘"8 q"u胤"n o ik違o"違pj"j逢荏pi"pjk隠w" 8院p"m院v"sw違"ejw{吋p"x鵜"x "oqogpv"w嘘p"e栄c"e丑e"d‒p"vtqpi"j嘘"8 q< + Ejw{吋p"x鵜"n噂p"pj医v"ik違o"zw嘘pi"4"n亥p"mjk"f運k"mj嘘k"8医v"v瑛"5J"n‒p"7J."x " ik違o"zw嘘pi"4.7"n亥p"mjk"f運k"mj嘘k"8医v"v瑛"5J"n‒p"33J0 -"Oqogpv"ik違o"zw嘘pi"5"n亥p"mjk"f運k"mj嘘k"8医v"v瑛"5J"n‒p"7J."x "ik違o"zw嘘pi" 5.7"n亥p"mjk"f運k"mj嘘k"8医v"v瑛"5J"n‒p"33J0 *J"n "ejk隠w"u¤w"e栄c"j嘘"8 q+ 5.Rj衣o"xk"違pj"j逢荏pi"n噂p"pj医v"e栄c"mj嘘k"8医v"8逸r"8院p"ejw{吋p"x鵜"x "oqogpv" w嘘p"e栄c"e丑e"d‒p"vtqpi"j嘘"8 q"mjq違pi"5J"x "u詠"違pj"j逢荏pi"pj臼"vj·"mfiq"f k"vtqpi" rj衣o"xk"t医v"n噂p"mjq違pi"33J0

6.Mjk"j嘘"8 q"u¤w"3.:o"vj·"xk羽e"v<pi"ejk隠w"u¤w"pi o"v逢運pi"ej逸p"mj»pi"違pj" j逢荏pi"pjk隠w"8院p"m院v"sw違"ejw{吋p"x鵜"e栄c"e丑e"vtqpi"j嘘"8 q0

7.Khi v<pi"ejk隠w"u¤w"pi o"v逢運pi"n "8o"n‒p";o"vj·"ejw{吋p"x鵜"picpi"e栄c"e丑e" ik違ọ"ikƒ"vt鵜"ejw{吋p"x鵜"n噂p"pj医v"e栄c"e丑e"eƒej"v逢運pi"6.769m ik違o"36'"uq"x噂k"ikƒ"vt鵜" ejw{吋p"x鵜"n噂p"pj医v"e栄c"e丑e"i亥p"v逢運pi"vtqpi"vt逢運pi"j嬰r"v逢運pi"f k"8o0"Mjk"vk院r"v映e" v<pi"ejk隠w"f k"v逢運pi"n‒p"34o"vj·"ejw{吋p"x鵜"picpi"e栄c"e丑e"ik違o"mjƒ"pjk隠w."ikƒ"vt鵜"

ejw{吋p"x鵜"picpin噂p"pj医ve栄c"e丑e"eƒej"v逢運pi"6.769oik違o"d茨pi"46'"ikƒ"vt鵜"ejw{吋p" x鵜"e栄c"e丑e"i亥p"v逢運pivtqpi"vt逢運pi"j嬰r"v逢運pi"f k"8ọ"v逢挨pi"v詠"ikƒ"vt鵜"ejw{吋p"x鵜"e栄c" eƒe"e丑e"荏"zc"v逢運pi"mjq違pi"eƒej"9.369o"32.869o"x "35.469o"e pi"ik違o0"Vt逢運pi" j嬰r" ew嘘k" mjk" v<pi" ejk隠w" f k" pi o" v逢運pi" 8o" 8院p" 3:o" vj·" m院v" sw違" ejw{吋p" x鵜" e栄c pj„o"e丑e"mj»pi"vjc{"8鰻k"pjk隠w"x噂k"vt逢運pi"j嬰r"v<pi"34o"p‒p"vt逢運pi"j嬰r"v逢運pi"f k" 3:o"n "mj»pi"mkpj"v院0 Rj逢挨pi"ƒp"v<pi"ejk隠w"u¤w"pi o"v逢運pi"mj»pi"rj́"j嬰r"x噂k" vt逢運pi"j嬰r"j嘘"8 q"e„"n噂r"8医v"{院w"f {"*vtqpi"e»pi"vt·pj"p {"d隠"f {"n噂r"8医v"{院w"n "

25m)

MK蔭P"PIJ卯

̇ Mjk"vjk"e»pi"j嘘"8 q"u¤w"vtqpi"8医v"{院w"e亥p"zgo"zfiv"違pj"j逢荏pi"e栄c"swƒ"vt·pj" vjk"e»pi"8院p"e丑e"d‒p"vtqpi"j嘘"8 q.

̇ J衣p"ej院"ej医v"v違k"zwpi"swcpj"j嘘"8 q"e„"n噂r"8医v"{院w"f {0

̇ E„" dk羽p" rjƒr" j衣p" ej院" ejw{吋p" x鵜" picpi" e栄c" v逢運pi" ej逸p" pj逢" u穎" f映pi" dk羽p" rjƒr"ikc"e嘘"e丑e"zk"o<pi8医v"荏"8ƒ{"j嘘"8 q0

̇ U胤"vk院p"j pj"rj¤p"v ej"違pj"j逢荏pi"e栄c"e丑e"d‒p"vtqpi"j嘘"8 q"mjk"vjc{"8鰻k"eác

nq衣k"e丑e"e„"8逢運pi"m pj."ejk隠w"f i vjc{"8鰻k0

̇ U胤"vk院p"j pj"rj¤p"v ej"x噂k"eƒe"nq衣k"v逢運pi"ej逸p"j嘘"8 q"mjƒe"pjcw0"

̇ U胤"vk院p"j pj"rj¤p"v ej"ejq"pjk隠w"e»pi"vt·pj"j嘘"8 q" u¤w"8吋"t¿v"tc"eƒe"dk吋w" vj泳e"swcp"j羽"ik英c"eƒe"8衣k"n逢嬰pi"8吋"v瑛"8„"e„"vj吋"f詠"v pj"8逢嬰e"rj衣o"xk"違pj"j逢荏pi"fq" vjk"e»pi"j嘘"8 q"*8員e"dk羽v"vtqpi"8医v"{院w+"i¤{"tc"ejq"e丑e"d‒p"vtqpi"j嘘"8 q0 ̇ U胤"rj¤p"v ej"vj‒o"pj英pi"{院w"v嘘"違pj"j逢荏pi"8院p"ejw{吋p"x鵜"e栄c"v逢運pi"x "8医v" p隠p"zwpi"swcpj0"V瑛"8„"8逢c"tc"pj英pi"ik違k"rjƒr"pj茨o"ik違o"vjk吋w"違pj"j逢荏pi"fq"vjk" e»pi"j嘘"8 q"i¤{"tc"ejq"e丑e"d‒p"vtqpi"j嘘"8 q0 ̇ Vk院r"v映e"v·o"jk吋w"vj‒o"x隠"eƒe"vj»pi"u嘘"8亥w"x q"e栄c"o»"j·pj"Jctfgpkpi"Uqkn" 8吋"e„"vj吋"v pj"vqƒp"8逢嬰e"ej pj"zƒe"j挨p"x "泳pi"f映pi"ejq"pjk隠w"e»pg trình khác.

VÉK"NK烏W"VJCO"MJ謂Q

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groups adjacent to surcharge loads. Computers and Geotechnics.

[2]. HG Poulos, LT Chen., 1996. Piles response due to unsupported excavation-

induced lateral soil movement. Canadian geotechnical journal.

[3]. Goh, ẠT.C, Wong, K.S., The, C.Ị and Wen, D., 2003. Pile response

adjacent to braced excavation. Journal of Geotechnical and

Geoenvironmental Engineering, Vol. 129, Nọ 4, pp. 383-386

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Chí Minh.

[17].Ej¤w"Pi丑e"域p."E挨"j丑e"8医v."PZD"A衣k"j丑e"Sw嘘e"ikc"Vr0"J欝"Ej "Okpj."422;0

[18].Vt亥p"Swcpi"J瓜."E»pi"vt·pj"vt‒p"8医v"{院w, PZD"A衣k"j丑e"Sw嘘e"ikc"Vr0"J欝"Ej "

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[20].Jq pi"Zw¤p"J逢pị"42330"Rj¤p"v ej"違pj"j逢荏pi"e栄c"j嘘"8 q"u¤w"x噂k"e丑e"嘘pi.

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