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不锈钢储罐地基处理方法之挤密处理-《储罐基础工程手册》

作者:镇田机械 时间:2019-05-02 03:05
不锈钢储罐地基处理方法之挤密处理用振冲、挤密法的原理是采用一定的手段,通过振动、挤压使地基上孔隙比减小,强度提高,达到地基处理的日的。根据采用的手段可分为下述几种方法。 信息摘要:

不锈钢储罐地基处理方法之挤密处理

水果拉霸多人版 ZHENCHONG、JIMIFADEYUANLISHICAIYONGDINGDESHOUDUAN,TONGGUOZHENDONG、JIYASHIDIJISHANGKONGXIBIJIANXIAO,QIANGDUTIGAO,DADAODIJICHULIDERIDE。GENJUCAIYONGDESHOUDUANKEFENWEIXIASHUJIZHONGFANGFA。

不锈钢储罐地基处理方法之挤密处理-《储罐基础工程手册》

(1)振动压实法,水果拉霸多人版采用人工或机械夯实、机械碾压或振动对填土、湿陷性黄上、松散无粘性土等软弱土或原来比较硫松表层土进行压实。也可采用分层回填压实加固,分层压实的填料也可适量填加石灰、水泥等。此法适用于浅层疏松粘性上(其含水量接近于含水量),松散砂性土,湿陷性土及杂填土。

(2)利用重锤自由下落时的冲击能夯实浅层土地基,使其表面形成层较为均匀的硬壳层,适用于无粘性土,杂填土,非饱和粘性土及湿陷黄土。

(3)振冲法,水果拉霸多人版利用种能产生水平向振动的管状机械设备在高压水流下边振边冲,在软弱粘性土地基中成孔,再在孔内分批填入碎石或卵石等材料制成根根桩体。桩体和原来的粘性土构成所谓的复合地基,以提高地基承载力,并减少压缩性。碎石桩的承载力和沉降量在很大程度上取决于周围土体对碎石桩的约束作用。如周围的土过于软弱,对碎石桩的约束作用就差。

LIYONGZHENDONGHESHUICHONGJIAGUDIJIDEFANGFAJIAOZUOZHENCHONGFA。ZHENCHONGFAYOUDEGUOS.StevemanZAI1939NIANTICHU,WOGUOYU1977NIANYINGYONG。YOUYUDALIANGGONGYEMINYONGJIANZHU、SHUILI、SHIHUAHEJIAOTONGGONGCHENGDIJIKANGZHENJIAGUDEXUYAO,GAIFADEDAOXUNSUTUIGUANG。ZHENCHONGFAZAOQIYONGLAIZHENMISONGSHADIJI,HOULAIYEYINGYONGYURUANZHANTUDIJI,ZHENCHONGFAYANBIANWEIZHENCHONGMISHIFAHEZHENCHONGZHIHUANFA。

ZHENCHONGZHIHUANDEJIAGUYUANLISHILIYONGZHENCHONGQIZAIGAOYALIUXIABIANZHENBIANCHONGZAIRUANRUOZHANXINGTUDIJICHENGKONG,ZAIZAIKONGNEIFENPITIANRUSUISHIDENGJIANYINGCAILIAO,ZHICHENGGENGENZHUANGTI,SUISHIZHUANGTIHEYUANDIJIGOUCHENGSUISHIZHUANGFUHEDIJI:ZHENCHONGMISHIFASHIYONGYUZHANLIHANLIANGXIAOYU10%DESONGSHADIJI。ZHENCHONGZHIHUANFASHIYONGYUBUPAISHUIKANGJIANQIANGDUDAYU20kPaDEZHANXINGTU、FENTUHERENGONGTIANTUDENGDIJI,YOUSHIHAIKEYONGLAICHULIFENMEIHUIDIJI。SHIYONGYURUANRUOZHANXINGTUDIJI,DANDUIYUKANGJIANQIANGDUJIAODIDEZHANXINGTU,CAIYONGSUISHIZHUANGSHIWUBISHENZHONGCONGSHI。

ZHENCHONGJIMIFATONGCHANGYONGYUJIAGUSHACENG,QIYUANLISHIFANGMIANYIKAOZHENCHONGQIDEQIANGLIZHENDONGSHIBAOHESHATUFASHENGYEHUA,SHAKELIZHONGXINPAILIE,KONGXIJIANSHAO,LINGFANGMIANZHENCHONGQIDESHUIPINGZHENDONGLI,ZAIJIAHUITIANLIAOQINGKUANGXIAHAITONGGUOTIANLIAOSHISHACENGJIYAMISHI,CIFASHIYONGYUSHAXINGTU,XIAOYU0.005mmZHANLIHANLIANGXIAOYU10%DEZHANXINGSHI,RUOZHANLIHANLIANGDAYU30%,XIAOGUOMINGXIANJIANGDI。

不锈钢储罐地基处理方法之挤密处理-《储罐基础工程手册》

(4)强夯法,水果拉霸多人版将很重的锤从高处自由落下,反复多次夯击地面,给地基冲击力和振动,从面提高地基土的强度并降低其压缩性。

水果拉霸多人版 QIANGHANGFACHULIDIJIXIANYOUFAGUOMenardGONGSIYU20SHIJI60NIANDAIMOCHUANGYONG。WOGUOYU1978NIANYINJIN,JIAOTONGBUHANGJUKEYANSUOJIXIEZUODANWEIZAITIANJINXIANKAIZHANSHIYANYANJIU。YOUYUGAIFASHEBEIJIANDAN、XIAOGUOXIANZHUJINGJIHESHIGONGKUAI,HENKUAIDEDAOTUIGUANG。CHUQIANGHANGJIMIWAI,JINNIANLAI,QIANGHANGZHIHUANDEDAOBUSHAOYINGYONG。QIANGHANGZHIHUANHEQIANGHANGJIMIZAIJIAGUJILISHANGSHIBUTONGDE,YINGYONGFANWEIYEBUXIANGTONG。QIANGHANGJIMIFACHANGYONGLAIJIAMIANSUISHITU、SHASHANG、DIBAOHEDUZHANXINGTU、SUTIANTU、ZATIANSHI、SHIXIANXINGHUANGTUDENGGELEIDIJI。DUIYUBAOHEDUJIAOGAODEZHANXINGSHIDIJI.RUYOUGONGCHENGJINGYANHUOSHIYANZHENGMINGCAIYONGQIANGHANGFAYOUJIAGUXIAOGUODEYEKECAIYONG。TONGCHANGRENWEIQIANGHANGJIMIFAZHISHIYONGYUSUXINGZHISHUlp≤10DETU。DUIYUSHEZHIYOUSHUXIANGPAISHUIXITONGDERUANZHANTUDIJI,SHIFOUCAIYONGQIANGFENFACHULIRIQIANYOUBUTONGKANFA,DUIYUHOUDUXIAOYU6mZUOYOUDERUANZHANSHICENGCAIYONGQIANGHANGZHIHUANFACHULI,BIANHANGBIANTIANSUISHIDENGCUKELILIAOXINGCHENGSHENDUWEI3m~6m,ZHIJINGWEI2mZUOYOUDESUISHIZHUANGTI,YUZHOUWEISHITIXINGCHENGFUHEDIJI,KEWANGQUDEJIAOHAODEJIAGUXIAOGUO。

水果拉霸多人版 QIANGHANGSHIGONGZHUYAOSHEBEIBAOKUOFENCHUI、QIZHONGJI、TUOGOUQIHEMENJIADENGBUFEN。GONGCHENGSHIJIANBIAOMING,SHIGONGJIJUHEGONGYIZHIJIEYINGXIANGJIAGUXIAOGUOHEJINGJIXIAOYI。CIFASHIYONGYUWUZHANXING、ZATIANTU、FEIBAOHEZHANXINGSHANGYIJISHIXIANXINGHUANGTUDENG。

(5)石灰桩法,水果拉霸多人版在软弱地基中用机械成孔,填人作为固化剂的生石灰并加以搅拌或压实形成桩体,利用生石灰的吸水、膨胀、放热作用和土与石灰的离子交换反应、凝硬反应等作用,改善桩体周围土体的物理力学性质,石灰桩和周围被改良的土体起组成复合地基,达到地基加固的目的。石灰加固地某的传统方法受到了外若土上程工作者的重视。石灰桩法“艺简单,不需复杂的施L机械.应用较广泛。其加固机理包括打桩时挤密、石灰吸水、膨胀、升温、离子交换、胶凝、碳化和置换等,但基本加固作用则可归纳为打桩挤密、桩周土脱水挤密和桩身的置换作用。从提高承载能力看,在正常情况下置换作用占的份额。经验与实践证明只要填充石灰达到必要的密实度则不会出现软心现象。另外采用粉煤灰等适宜的掺合料也有助于避发生软心现象。杭州和湖北两地挖出的工程桩桩身的抗压强度分别达到750kPa和564kPae桩土应力比是衡量置换作用的主要指标,要满足般工程要求,不需追求过高的应力比,当需要提高应力比时除了要保证桩身具有较高强度外,桩还必需打穿软土层以桩尖刺入降低应力比。

水果拉霸多人版 Broms(1987)HAIZHICHU,DANGYONGSHIHUIZHUANGCHULIRUANTUSHI,RUGUOYUYOUTOUSHUISHACENGHUOFENTUCENGSHIZESHIHUIDEPENGZHANGBIZHANTUDIJIDEGUJIELAIDEKUAI,ZHUANGTIJIZENGJIAJIANGHUICHANSHENGRUANZHANTUDIJIDELONGQIERBUSHIGUJIEHEHANSHUILIANGDEJIANSHAO。SHIHUIZHUANGFASHIYONGYURUANRUOZHANXINGTU。

不锈钢储罐地基处理方法之挤密处理-《储罐基础工程手册》

(6)砂桩,在松散砂土或人工填土中设置砂桩,能对周围土体产生挤密作用。或同时产生振密作用,可显著提高地基强度,改善地基的整体稳定性,并减少地基沉降量。

SHAZHUANGFAYU19SHIJI30NIANDAIQIYUANYUOUZHOU,20SHIJI50NIANDAIYINJINWOGUO。QISHISHAZHUANGFAYONGYUCHULISONGSANSHADIJI,SHISHIGONGFANGFABUTONG,YOUKEFENWEIJIMISHAZHUANGHEZHENMISHAZHUANG。HOULAI,YEYOUYONGLAIJIAGURUANRUOZHANXING+DIJI,TONGGUOSHAZHUANGDEZHIHUANZUOYONG,XINGCHENGSHAZHUANGFUDIJI,DUIQIJINXINGJIAZAIYUYA,YEKEJIAKUAIDIJITUANJIE。CIFASHIYONGFANWEIYUSONGSHADIJIHUOZATIANTU。

(7)灰土挤密桩,灰土挤密桩地基是由桩间挤密土和填夯的桩体组成的人.“复合地基”。灰土桩主要适用于消除湿陷性黄土地基的湿陷性,及用于提高人工填土地基的承载力,也用于非饱和粘性土。

HUITUZHUANGFAZAIWOGUOXIBEIHEHUABEIDIQUDEDAOGUANGFANYINGYONG。HUITUSHIYONGYUDIXIASHUIWEIYISHANGDESHIXIANXINGHUANGTU、ZATIANTUHESUTIANSHANGDENGDIJI。ZAICAIYONGHUITUZHUANGJIAGUDIJISHI,JINERNIANLAIYIZHONGSHIGONGYEFEILIAODELIYONG。

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