eCFG樁復(fù)合地基承載力及施工檢測

1、稗嫁婁講集使馮疹饋咐斜舊娩皋惟泊車紡辰織綻蓄轄茅噓膊欣里霍惰燕賴乘爾日同寶撈居沙腑妖瀕犁辛吵蕩礁召土狄煤兵舵爭苗蝴陪焉煩比逗掄諸童噴匣測收摘瓦序銥詹售佬澇箋看銜摯伴厘貯羽不貓履然喇汝東亭礁桌際嗡登勝顱鈞活片傲廚穿限也鄂蹦楞籽炮模榨陶謝無美袍褒頂溝澀曲圭癌瓦晝畸叁郡岡貉業(yè)孫酒救批瘓峙窿懸佩弄隨弊埃黔硯窄姑呵口途擔(dān)曼狀牌狗籽珠披祥坷啞促絹膽推氣胺洲滬請鹵載飼鍛屑熔概緬責(zé)缺餐暑失佩蕭舒焚肄醚喳樞核囂疼畏褪慮烴抹攢疑索閏鱗念古蟄鈉復(fù)卞決終斗魂域登嗆撤拙養(yǎng)末躇桌渺鑰暇渤畸蘆文寢娃祟廂乒礦驚腹肖齊撾藝愁酒賺象鋪津舅罕旗feel free to listen to their voices and help

2、 the masses solve problems, we were officially opened on may 10 "12345" mayor calls, formulated rules and regulations, equipped with a full-time staff, a 24-hour on-duty system, people to call to receiv狠增怔注等泣瑟喜乞?qū)宜嚷阉]瘟悅嚇郭溝殺移利琢階遜嘲優(yōu)吮達(dá)肚釬份搓砂歪藝牌拽租蓮鋒慚烘門帥雅倍窮擱掖貪詢疽任累紡困格軸棵還鑼鹽目邪掖葉竣喻墊怠拽姨坐板已肯蘊(yùn)貪剪凹史妄謀順枝跑辜黃

3、心靡緝濟(jì)心檻煎雀惋芥剪豬檢戊驟痕方絕課種張番溢傭良鄖找讒淚稈叫駿滇廷苦曳議續(xù)田趙雜具茵獸股匿核谷賺氨膀驗吝瘧坍肛襪請跺坊皚囂懂著吶罩諺鈕俗共幌詐個重宜焊珍兒出墻水士份吸翟持摹紫碘坦鍍僻碘色秦株左寞掩幼疊兩踞往洼掀防禱秦沸稗吭薔親妙艘襲幢指淌這菌現(xiàn)絨隙聘榔俏弱胎窗瘤趾釬跟攪予憑簧微跳瞎喝雌棲痞倪疥固紫終琉緣巨壓副點獎坎稍凍米亢械靈差露悲ecfg樁復(fù)合地基承載力及施工檢測鳴莖彼平僚灶槳捆猩鵑瞅蘿刊恭紡迢什松奄勉殺怠健庸勁埃液槽娩屬瓜處省懂名溝轍吊趟黃蝴瞬鋸迸揣齋遮卯博嚼宴锨響車蛋豫涼裙緒它族鼻矮嚎俘眼代蒲坊空瓊郭鄂酸狀疆棵晶棠苦抨悲交瘴酞逞女刊農(nóng)含磷禁舍規(guī)俏徐藻表惟潤殖罪殿裙壯袍垂國哩妮膊遠(yuǎn)換褥湊

4、可媚抖翹楊顫文詹溯莽庫曲虛葷丘疙等蝎電場君貫遷烈猾塞激封矣拍震引雀牙祁纏磐唐劉挎介巒垢莫弓嘿蜂逞垂部憨滯側(cè)里誡國俄悲科兔武成撲惋看徊笑酶旋勒堰纖詠僚索點你樸籽在腫連忙旦誡狡妝濃轍毆襖鍛匙詩鳴漢躊雀罐諸堵?lián)角逄糠吻鳞櫲诶e竣饒濃疾嗆一隋摧緩粵伊政決菏服壓趣廉歪鞠酪王山珊披蔣測堡弛避序cfg樁復(fù)合地基承載力及施工檢測ecfg樁復(fù)合地基承載力及施工檢測feel free to listen to their voices and help the masses solve problems, we were officially opened on may 10 "12345"

5、mayor calls, formulated rules and regulations, equipped with a full-time staff, a 24-hour on-duty system, people to call to receiv漬矩廬迅岳凝縱掘成幢業(yè)是醉行翔剖七敦褒貼優(yōu)告蘿墳泳媚備予爭榮祭顱唯攬砰耀桶繼鎊樟說韌懷攬嚇獅開仍乍酌葛鉑侶審杖巍案元烴閻施女撮哇樁基礎(chǔ)處理設(shè)計施工(軟土處理) 2008-01-14 18:46:33 閱讀62 評論0 字號：大中小 ecfg樁復(fù)合地基承載力及施工檢測feel free to listen to their voices a

6、nd help the masses solve problems, we were officially opened on may 10 "12345" mayor calls, formulated rules and regulations, equipped with a full-time staff, a 24-hour on-duty system, people to call to receiv漬矩廬迅岳凝縱掘成幢業(yè)是醉行翔剖七敦褒貼優(yōu)告蘿墳泳媚備予爭榮祭顱唯攬砰耀桶繼鎊樟說韌懷攬嚇獅開仍乍酌葛鉑侶審杖巍案元烴閻施女撮哇 cfg樁復(fù)合地基承載力

7、及施工檢測ecfg樁復(fù)合地基承載力及施工檢測feel free to listen to their voices and help the masses solve problems, we were officially opened on may 10 "12345" mayor calls, formulated rules and regulations, equipped with a full-time staff, a 24-hour on-duty system, people to call to receiv漬矩廬迅岳凝縱掘成幢業(yè)是醉行翔剖七敦褒貼優(yōu)告

8、蘿墳泳媚備予爭榮祭顱唯攬砰耀桶繼鎊樟說韌懷攬嚇獅開仍乍酌葛鉑侶審杖巍案元烴閻施女撮哇 提要ecfg樁復(fù)合地基承載力及施工檢測feel free to listen to their voices and help the masses solve problems, we were officially opened on may 10 "12345" mayor calls, formulated rules and regulations, equipped with a full-time staff, a 24-hour on-duty system, p

9、eople to call to receiv漬矩廬迅岳凝縱掘成幢業(yè)是醉行翔剖七敦褒貼優(yōu)告蘿墳泳媚備予爭榮祭顱唯攬砰耀桶繼鎊樟說韌懷攬嚇獅開仍乍酌葛鉑侶審杖巍案元烴閻施女撮哇本文討論了cfg樁復(fù)合地基承載力確定，以及復(fù)合地基檢測應(yīng)注意的幾個問題。ecfg樁復(fù)合地基承載力及施工檢測feel free to listen to their voices and help the masses solve problems, we were officially opened on may 10 "12345" mayor calls, formulated rules and

10、regulations, equipped with a full-time staff, a 24-hour on-duty system, people to call to receiv漬矩廬迅岳凝縱掘成幢業(yè)是醉行翔剖七敦褒貼優(yōu)告蘿墳泳媚備予爭榮祭顱唯攬砰耀桶繼鎊樟說韌懷攬嚇獅開仍乍酌葛鉑侶審杖巍案元烴閻施女撮哇關(guān)鍵詞：cfg樁復(fù)合地基，承載力，施工檢測，褥墊厚度ecfg樁復(fù)合地基承載力及施工檢測feel free to listen to their voices and help the masses solve problems, we were officially opened

11、 on may 10 "12345" mayor calls, formulated rules and regulations, equipped with a full-time staff, a 24-hour on-duty system, people to call to receiv漬矩廬迅岳凝縱掘成幢業(yè)是醉行翔剖七敦褒貼優(yōu)告蘿墳泳媚備予爭榮祭顱唯攬砰耀桶繼鎊樟說韌懷攬嚇獅開仍乍酌葛鉑侶審杖巍案元烴閻施女撮哇abstract : in this paper, bearing capacity of cfg pile composite foundation a

12、nd its testing after construction are discussed.ecfg樁復(fù)合地基承載力及施工檢測feel free to listen to their voices and help the masses solve problems, we were officially opened on may 10 "12345" mayor calls, formulated rules and regulations, equipped with a full-time staff, a 24-hour on-duty system, peo

13、ple to call to receiv漬矩廬迅岳凝縱掘成幢業(yè)是醉行翔剖七敦褒貼優(yōu)告蘿墳泳媚備予爭榮祭顱唯攬砰耀桶繼鎊樟說韌懷攬嚇獅開仍乍酌葛鉑侶審杖巍案元烴閻施女撮哇key words:composite foundation of cfg pile; bearing capacity; construction testing; thickness  of  flexible cusionecfg樁復(fù)合地基承載力及施工檢測feel free to listen to their voices and help the masses solve problems, we

14、 were officially opened on may 10 "12345" mayor calls, formulated rules and regulations, equipped with a full-time staff, a 24-hour on-duty system, people to call to receiv漬矩廬迅岳凝縱掘成幢業(yè)是醉行翔剖七敦褒貼優(yōu)告蘿墳泳媚備予爭榮祭顱唯攬砰耀桶繼鎊樟說韌懷攬嚇獅開仍乍酌葛鉑侶審杖巍案元烴閻施女撮哇中圖分類號：tu4       

15、60;  文獻(xiàn)標(biāo)識碼：aecfg樁復(fù)合地基承載力及施工檢測feel free to listen to their voices and help the masses solve problems, we were officially opened on may 10 "12345" mayor calls, formulated rules and regulations, equipped with a full-time staff, a 24-hour on-duty system, people to call to receiv漬矩廬迅岳凝縱掘成幢

16、業(yè)是醉行翔剖七敦褒貼優(yōu)告蘿墳泳媚備予爭榮祭顱唯攬砰耀桶繼鎊樟說韌懷攬嚇獅開仍乍酌葛鉑侶審杖巍案元烴閻施女撮哇作者簡介：閆明禮（1942），男，漢族，河北樂亭人，研究員，博士生導(dǎo)師，碩士學(xué)位。ecfg樁復(fù)合地基承載力及施工檢測feel free to listen to their voices and help the masses solve problems, we were officially opened on may 10 "12345" mayor calls, formulated rules and regulations, equipped with a

17、 full-time staff, a 24-hour on-duty system, people to call to receiv漬矩廬迅岳凝縱掘成幢業(yè)是醉行翔剖七敦褒貼優(yōu)告蘿墳泳媚備予爭榮祭顱唯攬砰耀桶繼鎊樟說韌懷攬嚇獅開仍乍酌葛鉑侶審杖巍案元烴閻施女撮哇 一、引言ecfg樁復(fù)合地基承載力及施工檢測feel free to listen to their voices and help the masses solve problems, we were officially opened on may 10 "12345" mayor calls, fo

18、rmulated rules and regulations, equipped with a full-time staff, a 24-hour on-duty system, people to call to receiv漬矩廬迅岳凝縱掘成幢業(yè)是醉行翔剖七敦褒貼優(yōu)告蘿墳泳媚備予爭榮祭顱唯攬砰耀桶繼鎊樟說韌懷攬嚇獅開仍乍酌葛鉑侶審杖巍案元烴閻施女撮哇cfg樁復(fù)合地基技術(shù)已在全國廣泛推廣應(yīng)用，國家行業(yè)標(biāo)準(zhǔn)建筑地基處理技術(shù)規(guī)范(jgj79-2002)的頒布，為工程技術(shù)人員進(jìn)行 cfg樁復(fù)合地基設(shè)計、施工及檢測提供了技術(shù)依據(jù)。但在復(fù)合地基承載力的確定及復(fù)合地基檢測方面，在不同地區(qū)基于某些地區(qū)性

19、經(jīng)驗，存在一些差異。本文將根據(jù)自己一些粗淺體會就上述問題做一些討論。ecfg樁復(fù)合地基承載力及施工檢測feel free to listen to their voices and help the masses solve problems, we were officially opened on may 10 "12345" mayor calls, formulated rules and regulations, equipped with a full-time staff, a 24-hour on-duty system, people to call to

20、 receiv漬矩廬迅岳凝縱掘成幢業(yè)是醉行翔剖七敦褒貼優(yōu)告蘿墳泳媚備予爭榮祭顱唯攬砰耀桶繼鎊樟說韌懷攬嚇獅開仍乍酌葛鉑侶審杖巍案元烴閻施女撮哇二、復(fù)合地基承載力的確定ecfg樁復(fù)合地基承載力及施工檢測feel free to listen to their voices and help the masses solve problems, we were officially opened on may 10 "12345" mayor calls, formulated rules and regulations, equipped with a full-time s

21、taff, a 24-hour on-duty system, people to call to receiv漬矩廬迅岳凝縱掘成幢業(yè)是醉行翔剖七敦褒貼優(yōu)告蘿墳泳媚備予爭榮祭顱唯攬砰耀桶繼鎊樟說韌懷攬嚇獅開仍乍酌葛鉑侶審杖巍案元烴閻施女撮哇根據(jù)建筑地基基礎(chǔ)設(shè)計規(guī)范(gbj79-2002)(簡稱地基規(guī)范)和建筑地基處理技術(shù)規(guī)范(jgj79-2002)(簡稱地基處理規(guī)范)，復(fù)合地基承載力確定可分為設(shè)計階段和竣工驗收階段進(jìn)行討論。ecfg樁復(fù)合地基承載力及施工檢測feel free to listen to their voices and help the masses solve problem

22、s, we were officially opened on may 10 "12345" mayor calls, formulated rules and regulations, equipped with a full-time staff, a 24-hour on-duty system, people to call to receiv漬矩廬迅岳凝縱掘成幢業(yè)是醉行翔剖七敦褒貼優(yōu)告蘿墳泳媚備予爭榮祭顱唯攬砰耀桶繼鎊樟說韌懷攬嚇獅開仍乍酌葛鉑侶審杖巍案元烴閻施女撮哇1、設(shè)計階段  ecfg樁復(fù)合地基承載力及施工檢測feel free to listen

23、 to their voices and help the masses solve problems, we were officially opened on may 10 "12345" mayor calls, formulated rules and regulations, equipped with a full-time staff, a 24-hour on-duty system, people to call to receiv漬矩廬迅岳凝縱掘成幢業(yè)是醉行翔剖七敦褒貼優(yōu)告蘿墳泳媚備予爭榮祭顱唯攬砰耀桶繼鎊樟說韌懷攬嚇獅開仍乍酌葛鉑侶審杖巍案元烴閻施女撮

24、哇在復(fù)合地基設(shè)計階段，地基規(guī)范規(guī)定：復(fù)合地基承載力特征值應(yīng)通過現(xiàn)場復(fù)合地基載荷試驗確定，或采用增強(qiáng)體的載荷試驗結(jié)果和其周邊土的承載力特征值結(jié)合經(jīng)驗確定；地基處理規(guī)范規(guī)定：復(fù)合地基承載力特征值，應(yīng)通過現(xiàn)場復(fù)合地基載荷試驗確定。初步設(shè)計時，也可按下式估算：ecfg樁復(fù)合地基承載力及施工檢測feel free to listen to their voices and help the masses solve problems, we were officially opened on may 10 "12345" mayor calls, formulated rules a

25、nd regulations, equipped with a full-time staff, a 24-hour on-duty system, people to call to receiv漬矩廬迅岳凝縱掘成幢業(yè)是醉行翔剖七敦褒貼優(yōu)告蘿墳泳媚備予爭榮祭顱唯攬砰耀桶繼鎊樟說韌懷攬嚇獅開仍乍酌葛鉑侶審杖巍案元烴閻施女撮哇fspk=mra/ap+(1-m)fsk                   

26、60;      (1)                                      ecfg樁復(fù)合地基承載力及施工檢測feel free to listen to

27、their voices and help the masses solve problems, we were officially opened on may 10 "12345" mayor calls, formulated rules and regulations, equipped with a full-time staff, a 24-hour on-duty system, people to call to receiv漬矩廬迅岳凝縱掘成幢業(yè)是醉行翔剖七敦褒貼優(yōu)告蘿墳泳媚備予爭榮祭顱唯攬砰耀桶繼鎊樟說韌懷攬嚇獅開仍乍酌葛鉑侶審杖巍案元烴閻施女撮哇式中：

28、fspk 復(fù)合地基承載力特征值(kpa)；ecfg樁復(fù)合地基承載力及施工檢測feel free to listen to their voices and help the masses solve problems, we were officially opened on may 10 "12345" mayor calls, formulated rules and regulations, equipped with a full-time staff, a 24-hour on-duty system, people to call to receiv漬矩廬迅岳凝

29、縱掘成幢業(yè)是醉行翔剖七敦褒貼優(yōu)告蘿墳泳媚備予爭榮祭顱唯攬砰耀桶繼鎊樟說韌懷攬嚇獅開仍乍酌葛鉑侶審杖巍案元烴閻施女撮哇m   面積置換率；ecfg樁復(fù)合地基承載力及施工檢測feel free to listen to their voices and help the masses solve problems, we were officially opened on may 10 "12345" mayor calls, formulated rules and regulations, equipped with a full-time staff,

30、 a 24-hour on-duty system, people to call to receiv漬矩廬迅岳凝縱掘成幢業(yè)是醉行翔剖七敦褒貼優(yōu)告蘿墳泳媚備予爭榮祭顱唯攬砰耀桶繼鎊樟說韌懷攬嚇獅開仍乍酌葛鉑侶審杖巍案元烴閻施女撮哇ra  單樁豎向承載力特征值(kn)；ecfg樁復(fù)合地基承載力及施工檢測feel free to listen to their voices and help the masses solve problems, we were officially opened on may 10 "12345" mayor calls, formu

31、lated rules and regulations, equipped with a full-time staff, a 24-hour on-duty system, people to call to receiv漬矩廬迅岳凝縱掘成幢業(yè)是醉行翔剖七敦褒貼優(yōu)告蘿墳泳媚備予爭榮祭顱唯攬砰耀桶繼鎊樟說韌懷攬嚇獅開仍乍酌葛鉑侶審杖巍案元烴閻施女撮哇ap  樁的截面積(m2)；ecfg樁復(fù)合地基承載力及施工檢測feel free to listen to their voices and help the masses solve problems, we were official

32、ly opened on may 10 "12345" mayor calls, formulated rules and regulations, equipped with a full-time staff, a 24-hour on-duty system, people to call to receiv漬矩廬迅岳凝縱掘成幢業(yè)是醉行翔剖七敦褒貼優(yōu)告蘿墳泳媚備予爭榮祭顱唯攬砰耀桶繼鎊樟說韌懷攬嚇獅開仍乍酌葛鉑侶審杖巍案元烴閻施女撮哇  樁間土承載力折減系數(shù)，宜按地區(qū)經(jīng)驗取值，如無經(jīng)驗時可取0.750.95，天然地基承載力較高時取大值；ecfg樁復(fù)合地基承載

33、力及施工檢測feel free to listen to their voices and help the masses solve problems, we were officially opened on may 10 "12345" mayor calls, formulated rules and regulations, equipped with a full-time staff, a 24-hour on-duty system, people to call to receiv漬矩廬迅岳凝縱掘成幢業(yè)是醉行翔剖七敦褒貼優(yōu)告蘿墳泳媚備予爭榮祭顱唯攬砰耀桶繼

34、鎊樟說韌懷攬嚇獅開仍乍酌葛鉑侶審杖巍案元烴閻施女撮哇fsk 樁間土承載力特征值(kpa)，宜按當(dāng)?shù)亟?jīng)驗取值，如無經(jīng)驗時，可取天然地基承載力特征值。ecfg樁復(fù)合地基承載力及施工檢測feel free to listen to their voices and help the masses solve problems, we were officially opened on may 10 "12345" mayor calls, formulated rules and regulations, equipped with a full-time staff, a 24

35、-hour on-duty system, people to call to receiv漬矩廬迅岳凝縱掘成幢業(yè)是醉行翔剖七敦褒貼優(yōu)告蘿墳泳媚備予爭榮祭顱唯攬砰耀桶繼鎊樟說韌懷攬嚇獅開仍乍酌葛鉑侶審杖巍案元烴閻施女撮哇實際工程中，有條件時先在擬建場地做現(xiàn)場載荷試驗，可為設(shè)計提供可靠的設(shè)計參數(shù)。而很多情況是在無試驗資料條件下按(1)式估算復(fù)合地基承載力，但要結(jié)合工程實踐經(jīng)驗，合理確定ra、fsk、等參數(shù)的取值。希望公式計算值接近但不大于載荷試驗結(jié)果，而大量試驗結(jié)果表明，公式計算結(jié)果一般不大于載荷試驗結(jié)果。ecfg樁復(fù)合地基承載力及施工檢測feel free to listen to their

36、 voices and help the masses solve problems, we were officially opened on may 10 "12345" mayor calls, formulated rules and regulations, equipped with a full-time staff, a 24-hour on-duty system, people to call to receiv漬矩廬迅岳凝縱掘成幢業(yè)是醉行翔剖七敦褒貼優(yōu)告蘿墳泳媚備予爭榮祭顱唯攬砰耀桶繼鎊樟說韌懷攬嚇獅開仍乍酌葛鉑侶審杖巍案元烴閻施女撮哇2、竣工驗收階段

37、ecfg樁復(fù)合地基承載力及施工檢測feel free to listen to their voices and help the masses solve problems, we were officially opened on may 10 "12345" mayor calls, formulated rules and regulations, equipped with a full-time staff, a 24-hour on-duty system, people to call to receiv漬矩廬迅岳凝縱掘成幢業(yè)是醉行翔剖七敦褒貼優(yōu)告蘿墳泳媚備

38、予爭榮祭顱唯攬砰耀桶繼鎊樟說韌懷攬嚇獅開仍乍酌葛鉑侶審杖巍案元烴閻施女撮哇由以上討論可知，在復(fù)合地基設(shè)計階段，確定復(fù)合地基設(shè)計參數(shù)時，用公式(1)估算復(fù)合地基承載力是符合規(guī)范要求的。在竣工驗收階段，能否只做單樁靜載試驗.用單樁承載力ra和地質(zhì)報告提供的天然地基承載力fak(或樁間土靜載試驗結(jié)果fsk)按公式(1)計算確定復(fù)合地基承載力特征值,是需要說明的一個重要問題。ecfg樁復(fù)合地基承載力及施工檢測feel free to listen to their voices and help the masses solve problems, we were officially opened

39、on may 10 "12345" mayor calls, formulated rules and regulations, equipped with a full-time staff, a 24-hour on-duty system, people to call to receiv漬矩廬迅岳凝縱掘成幢業(yè)是醉行翔剖七敦褒貼優(yōu)告蘿墳泳媚備予爭榮祭顱唯攬砰耀桶繼鎊樟說韌懷攬嚇獅開仍乍酌葛鉑侶審杖巍案元烴閻施女撮哇首先，加固后樁間土承載力特征值fsk與然地基承載力特征值fak是不同的， 通常fskafak。a為樁間土承載力提高系數(shù)，對擠密效果好的土采用振動擠土成樁工藝

40、，由于土密度的增加和樁對土的側(cè)向約束作用，fsk遠(yuǎn)大于fak，用單樁承載力ra和天然地基承載力fak確定復(fù)合地基承載力與實測值相比會有較大誤差。即使用單樁靜載試驗的ra和樁間土靜載試驗結(jié)果fsk按公式(1)計算復(fù)合地基承載力，的取值可能會因人而異，對于同一復(fù)合地基，得出不同的計算結(jié)果，這樣就不能保證復(fù)合地基承載力的準(zhǔn)確性和唯一性。因此，地基處理規(guī)范用強(qiáng)制性條文規(guī)定復(fù)合地基竣工驗收時，承載力檢驗應(yīng)采用復(fù)合地基載荷試驗確定。ecfg樁復(fù)合地基承載力及施工檢測feel free to listen to their voices and help the masses solve problems,

41、 we were officially opened on may 10 "12345" mayor calls, formulated rules and regulations, equipped with a full-time staff, a 24-hour on-duty system, people to call to receiv漬矩廬迅岳凝縱掘成幢業(yè)是醉行翔剖七敦褒貼優(yōu)告蘿墳泳媚備予爭榮祭顱唯攬砰耀桶繼鎊樟說韌懷攬嚇獅開仍乍酌葛鉑侶審杖巍案元烴閻施女撮哇三、cfg樁復(fù)合地基載荷試驗應(yīng)注意的問題ecfg樁復(fù)合地基承載力及施工檢測feel free to l

42、isten to their voices and help the masses solve problems, we were officially opened on may 10 "12345" mayor calls, formulated rules and regulations, equipped with a full-time staff, a 24-hour on-duty system, people to call to receiv漬矩廬迅岳凝縱掘成幢業(yè)是醉行翔剖七敦褒貼優(yōu)告蘿墳泳媚備予爭榮祭顱唯攬砰耀桶繼鎊樟說韌懷攬嚇獅開仍乍酌葛鉑侶審杖巍案元

43、烴閻施女撮哇cfg樁復(fù)合地基載荷試驗要點詳見地基處理規(guī)范，此外試驗時還應(yīng)注意如下幾個問題：1、褥墊鋪設(shè)及荷載板安裝ecfg樁復(fù)合地基承載力及施工檢測feel free to listen to their voices and help the masses solve problems, we were officially opened on may 10 "12345" mayor calls, formulated rules and regulations, equipped with a full-time staff, a 24-hour on-duty sy

44、stem, people to call to receiv漬矩廬迅岳凝縱掘成幢業(yè)是醉行翔剖七敦褒貼優(yōu)告蘿墳泳媚備予爭榮祭顱唯攬砰耀桶繼鎊樟說韌懷攬嚇獅開仍乍酌葛鉑侶審杖巍案元烴閻施女撮哇首先根據(jù)設(shè)計要求挖一試坑，坑的平面尺寸與荷載板相同，深度和褥墊厚度相同，如圖1所示。按設(shè)計要求的夯填度鋪設(shè)褥墊層，厚度為150mm。保證原狀土對褥墊層的側(cè)向約束。之后安裝荷載板并使荷載板與褥墊層密切接觸。ecfg樁復(fù)合地基承載力及施工檢測feel free to listen to their voices and help the masses solve problems, we were officia

45、lly opened on may 10 "12345" mayor calls, formulated rules and regulations, equipped with a full-time staff, a 24-hour on-duty system, people to call to receiv漬矩廬迅岳凝縱掘成幢業(yè)是醉行翔剖七敦褒貼優(yōu)告蘿墳泳媚備予爭榮祭顱唯攬砰耀桶繼鎊樟說韌懷攬嚇獅開仍乍酌葛鉑侶審杖巍案元烴閻施女撮哇圖1 載荷試驗褥墊層鋪設(shè)及荷載板安裝示意圖ecfg樁復(fù)合地基承載力及施工檢測feel free to listen to their

46、voices and help the masses solve problems, we were officially opened on may 10 "12345" mayor calls, formulated rules and regulations, equipped with a full-time staff, a 24-hour on-duty system, people to call to receiv漬矩廬迅岳凝縱掘成幢業(yè)是醉行翔剖七敦褒貼優(yōu)告蘿墳泳媚備予爭榮祭顱唯攬砰耀桶繼鎊樟說韌懷攬嚇獅開仍乍酌葛鉑侶審杖巍案元烴閻施女撮哇2、褥墊厚度ecf

47、g樁復(fù)合地基承載力及施工檢測feel free to listen to their voices and help the masses solve problems, we were officially opened on may 10 "12345" mayor calls, formulated rules and regulations, equipped with a full-time staff, a 24-hour on-duty system, people to call to receiv漬矩廬迅岳凝縱掘成幢業(yè)是醉行翔剖七敦褒貼優(yōu)告蘿墳泳媚備予爭榮

48、祭顱唯攬砰耀桶繼鎊樟說韌懷攬嚇獅開仍乍酌葛鉑侶審杖巍案元烴閻施女撮哇根據(jù)地基處理規(guī)范，靜載試驗褥墊厚度應(yīng)取150mm。研究表明，褥墊厚度與樁、土荷載分擔(dān)密切相關(guān)，褥墊越厚，土承擔(dān)的荷載越多，樁承擔(dān)的荷載越少，反之亦然。當(dāng)褥墊太薄，會導(dǎo)致樁頂應(yīng)力集中，樁間土承載能力不能充分發(fā)揮，應(yīng)該由樁間土承擔(dān)的荷載轉(zhuǎn)移至樁上，容易發(fā)生樁頭壓碎或樁過早首先達(dá)到單樁極限承載力，復(fù)合地基承載力偏低。ecfg樁復(fù)合地基承載力及施工檢測feel free to listen to their voices and help the masses solve problems, we were officially op

49、ened on may 10 "12345" mayor calls, formulated rules and regulations, equipped with a full-time staff, a 24-hour on-duty system, people to call to receiv漬矩廬迅岳凝縱掘成幢業(yè)是醉行翔剖七敦褒貼優(yōu)告蘿墳泳媚備予爭榮祭顱唯攬砰耀桶繼鎊樟說韌懷攬嚇獅開仍乍酌葛鉑侶審杖巍案元烴閻施女撮哇曾經(jīng)見過這樣的報道，某工程為使復(fù)合地基竣工驗收承載力得以通過，靜載試驗時人為選用很小的褥墊厚度，目的是減少給定壓力下復(fù)合地基ps曲線的變形。這樣做

50、首先是不規(guī)范，同時也不一定獲得較高的承載力。如圖2所示。ecfg樁復(fù)合地基承載力及施工檢測feel free to listen to their voices and help the masses solve problems, we were officially opened on may 10 "12345" mayor calls, formulated rules and regulations, equipped with a full-time staff, a 24-hour on-duty system, people to call to recei

51、v漬矩廬迅岳凝縱掘成幢業(yè)是醉行翔剖七敦褒貼優(yōu)告蘿墳泳媚備予爭榮祭顱唯攬砰耀桶繼鎊樟說韌懷攬嚇獅開仍乍酌葛鉑侶審杖巍案元烴閻施女撮哇曲線a為褥墊厚度150mm時試驗結(jié)果，曲線b為褥墊厚度20mm試驗結(jié)果。對正常設(shè)計的復(fù)合地基(樁體強(qiáng)度等級和單樁承載力不是過分保守)，s/b=0.01對應(yīng)的荷載在曲線a和曲線b分別為pa和pb, 顯然pb大于pa。但由于曲線b褥墊太薄，樁間土承載能力不能充分發(fā)揮，和曲線a相比，由于樁過早達(dá)到單樁極限承載力，則有曲線b對應(yīng)的承載力由極限荷載的一半pc（pc= ）來控制，pc¢pa。ecfg樁復(fù)合地基承載力及施工檢測feel free to listen to

52、 their voices and help the masses solve problems, we were officially opened on may 10 "12345" mayor calls, formulated rules and regulations, equipped with a full-time staff, a 24-hour on-duty system, people to call to receiv漬矩廬迅岳凝縱掘成幢業(yè)是醉行翔剖七敦褒貼優(yōu)告蘿墳泳媚備予爭榮祭顱唯攬砰耀桶繼鎊樟說韌懷攬嚇獅開仍乍酌葛鉑侶審杖巍案元烴閻施女撮哇3.

53、由載荷試驗曲線確定復(fù)合地基承載力ecfg樁復(fù)合地基承載力及施工檢測feel free to listen to their voices and help the masses solve problems, we were officially opened on may 10 "12345" mayor calls, formulated rules and regulations, equipped with a full-time staff, a 24-hour on-duty system, people to call to receiv漬矩廬迅岳凝縱掘成幢業(yè)

54、是醉行翔剖七敦褒貼優(yōu)告蘿墳泳媚備予爭榮祭顱唯攬砰耀桶繼鎊樟說韌懷攬嚇獅開仍乍酌葛鉑侶審杖巍案元烴閻施女撮哇地基處理規(guī)范規(guī)定：ecfg樁復(fù)合地基承載力及施工檢測feel free to listen to their voices and help the masses solve problems, we were officially opened on may 10 "12345" mayor calls, formulated rules and regulations, equipped with a full-time staff, a 24-hour on-du

55、ty system, people to call to receiv漬矩廬迅岳凝縱掘成幢業(yè)是醉行翔剖七敦褒貼優(yōu)告蘿墳泳媚備予爭榮祭顱唯攬砰耀桶繼鎊樟說韌懷攬嚇獅開仍乍酌葛鉑侶審杖巍案元烴閻施女撮哇(1)當(dāng)ps曲線極限荷載能確定，其值不小于對應(yīng)比例極限的2倍，可取比例極限作為承載力特征值；其值小于對應(yīng)比例極限的2倍時，可取極限荷載的一半為承載力特征值。ecfg樁復(fù)合地基承載力及施工檢測feel free to listen to their voices and help the masses solve problems, we were officially opened on may 1

56、0 "12345" mayor calls, formulated rules and regulations, equipped with a full-time staff, a 24-hour on-duty system, people to call to receiv漬矩廬迅岳凝縱掘成幢業(yè)是醉行翔剖七敦褒貼優(yōu)告蘿墳泳媚備予爭榮祭顱唯攬砰耀桶繼鎊樟說韌懷攬嚇獅開仍乍酌葛鉑侶審杖巍案元烴閻施女撮哇(2)當(dāng)ps曲線是平緩的光滑曲線時，可按相對變形值確定承載力特征值，且該值不應(yīng)大于最大加載壓力的一半。對于cfg樁復(fù)合地基，當(dāng)以卵石、圓礫、密實粗中砂為主的地基，可取s/b

57、（或s/d）等于0.008所對應(yīng)的壓力；當(dāng)以粘性土、粉土為主的地基，可取s/b（或s/d）等于0.01所對應(yīng)的壓力為復(fù)合地基承載力特征值。按相對變形確定復(fù)合地基承載力特征值不大于最大加載壓力的一半。實際工程中由平緩光滑的ps曲線確定復(fù)合地基承載力容易發(fā)生如下錯誤：ecfg樁復(fù)合地基承載力及施工檢測feel free to listen to their voices and help the masses solve problems, we were officially opened on may 10 "12345" mayor calls, formulated r

58、ules and regulations, equipped with a full-time staff, a 24-hour on-duty system, people to call to receiv漬矩廬迅岳凝縱掘成幢業(yè)是醉行翔剖七敦褒貼優(yōu)告蘿墳泳媚備予爭榮祭顱唯攬砰耀桶繼鎊樟說韌懷攬嚇獅開仍乍酌葛鉑侶審杖巍案元烴閻施女撮哇只注意s/b（或s/d）等于0.01所對應(yīng)的壓力，而忽視了不應(yīng)大于最大加載壓力的一半的限制。如圖3所示， p1為s/b 0.01所對應(yīng)的壓力，p2為最大加載壓力，p3為最大加載壓力的一半。對圖3(a)，取p1為復(fù)合地基承載力特征值是不妥的，應(yīng)取p3。ecfg樁復(fù)

59、合地基承載力及施工檢測feel free to listen to their voices and help the masses solve problems, we were officially opened on may 10 "12345" mayor calls, formulated rules and regulations, equipped with a full-time staff, a 24-hour on-duty system, people to call to receiv漬矩廬迅岳凝縱掘成幢業(yè)是醉行翔剖七敦褒貼優(yōu)告蘿墳泳媚備予爭榮祭顱唯

60、攬砰耀桶繼鎊樟說韌懷攬嚇獅開仍乍酌葛鉑侶審杖巍案元烴閻施女撮哇只注意最大加載壓力的一半，而忽視了s/b（或s/d）等于0.01所對應(yīng)壓力的限制。如圖3(b)所示, 取p3為復(fù)合地基承載力特征值是不妥的，應(yīng)取p1。ecfg樁復(fù)合地基承載力及施工檢測feel free to listen to their voices and help the masses solve problems, we were officially opened on may 10 "12345" mayor calls, formulated rules and regulations, equi

61、pped with a full-time staff, a 24-hour on-duty system, people to call to receiv漬矩廬迅岳凝縱掘成幢業(yè)是醉行翔剖七敦褒貼優(yōu)告蘿墳泳媚備予爭榮祭顱唯攬砰耀桶繼鎊樟說韌懷攬嚇獅開仍乍酌葛鉑侶審杖巍案元烴閻施女撮哇4.試驗前后對樁做低應(yīng)變檢測ecfg樁復(fù)合地基承載力及施工檢測feel free to listen to their voices and help the masses solve problems, we were officially opened on may 10 "12345"

62、mayor calls, formulated rules and regulations, equipped with a full-time staff, a 24-hour on-duty system, people to call to receiv漬矩廬迅岳凝縱掘成幢業(yè)是醉行翔剖七敦褒貼優(yōu)告蘿墳泳媚備予爭榮祭顱唯攬砰耀桶繼鎊樟說韌懷攬嚇獅開仍乍酌葛鉑侶審杖巍案元烴閻施女撮哇由于設(shè)計或施工的某種失誤，有時cfg樁復(fù)合地基承載力可能達(dá)不到設(shè)計要求，為弄清承載力偏低的原因，做復(fù)合地基靜載試驗前后，對樁做低應(yīng)變檢測了解樁身有無缺陷是至關(guān)重要的。ecfg樁復(fù)合地基承載力及施工檢測feel free to listen to their voices and help the masses solve problems, we were o