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赣州钢护桶出租在施工埋设时需要注意哪些事项?如何安全施工?

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赣州钢护桶出租在施工埋设时需要注意哪些事项?如何安全施工?

发布日期:2021-07-06 作者: 点击:

首先,人工挖掘孔处护筒埋设深度范围的土壤,然后用起重机吊装护筒,然后回填夯实。水(shui)中钻(zuan)桩施工时,护筒应通过旋挖钻(zuan)机沉降。埋(mai)设护筒(tong)时,护筒(tong)顶口(kou)应(ying)高出(chu)原地(di)面20-30cm。钢制护筒(tong)对称(cheng)设置四个吊点,吊起(qi)后(hou)(hou)使(shi)其自(zi)然垂直(zhi),利(li)用四个吊点形成的十字线,移(yi)动(dong)护筒(tong),使(shi)其中(zhong)(zhong)间(jian)的垂直(zhi)线与桩中(zhong)(zhong)间(jian)线重合,然后(hou)(hou)检查(cha),确(que)保(bao)(bao)护筒(tong)垂直(zhi),位置准确(que),以保(bao)(bao)误差不大于(yu)50mm。验收(shou)合格后(hou)(hou),即在(zai)护筒(tong)周围对称(cheng)均匀地(di)回(hui)填粘(zhan)土(tu),分层(ceng)夯实,填充高度以及原地(di)面或高于(yu)地(di)下水(shui)位1.5m为准,待灌桩完成后(hou)(hou)拔(ba)出(chu)钢制护筒(tong)周转(zhuan)使(shi)用。水(shui)中(zhong)(zhong)用锤击(ji)、压(ya)力、振(zhen)动(dong)等方法将护筒(tong)下沉。护筒(tong)埋(mai)在(zai)河床面以下1米;水(shui)中(zhong)(zhong)平台根据施(shi)工(gong)水(shui)位、流(liu)速、冲刷和地(di)质(zhi)条件等因素确(que)定(ding)埋(mai)深,必要时打(da)入不透(tou)水(shui)层(ceng)。水(shui)中(zhong)(zhong)平台上下沉护筒(tong),由导向设备控制。

赣州钢护桶出租

多节护(hu)筒(tong)(tong)(tong)连(lian)接时,接缝应牢(lao)固,筒(tong)(tong)(tong)内连(lian)接处(chu)无异物,钻(zuan)孔、吊装钢筋笼和(he)浇注水(shui)下(xia)混凝(ning)土时不得碰撞护(hu)筒(tong)(tong)(tong)。用护(hu)筒(tong)(tong)(tong)固定(ding)钢筋笼和(he)支撑浇注漏斗时,应采取(qu)措施(shi),防止护(hu)筒(tong)(tong)(tong)下(xia)沉(chen)、浮起或(huo)损坏。

赣州钢护桶埋设只是旋挖钻机施工的开始。钢护筒的平面位置和垂直位置应准确,钢护筒的周围和底角应紧密且不透水。

赣州钢护桶出租埋设护套时,应通过定位控制桩放样,将旋挖钻机钻孔的位置标记在孔底。然后将钢护套吊在孔中,找出护套的中心位置,用十字线标记护套的顶部或底部,然后移动护套,使护套中心与旋挖钻机钻孔中心重合,同时用水平尺或垂直球检查,使其垂直。

接着(zhe),在其周围对(dui)称、均匀(yun)地回填(tian)粘(zhan)土(tu),或(huo)水泥砂浆(jiang),要分层夯(hang)(hang)实(shi),达到固(gu)定(ding)护(hu)(hu)(hu)筒(tong)(tong)(tong)位(wei)置(zhi)的目的,有条(tiao)件的情况(kuang)下,护(hu)(hu)(hu)筒(tong)(tong)(tong)上口用枕木对(dui)称地绑紧固(gu)定(ding),以保其垂(chui)直度,防(fang)止(zhi)泥浆(jiang)流失和位(wei)移脱(tuo)落(luo)。若护(hu)(hu)(hu)筒(tong)(tong)(tong)底(di)土(tu)层不是粘(zhan)性(xing)土(tu),应(ying)挖(wa)深或(huo)换土(tu),旋挖(wa)钻(zuan)孔(kong)底(di)回填(tian)夯(hang)(hang)实(shi)300-500mm厚度的粘(zhan)性(xing)土(tu)后,再放置(zhi)护(hu)(hu)(hu)筒(tong)(tong)(tong),以免护(hu)(hu)(hu)筒(tong)(tong)(tong)底(di)口漏水塌(ta)方,夯(hang)(hang)填(tian)时(shi)应(ying)防(fang)止(zhi)旋挖(wa)钻(zuan)机护(hu)(hu)(hu)筒(tong)(tong)(tong)偏斜(xie)。

长(zhang)护(hu)筒或全护(hu)筒护(hu)壁(bi)必须(xu)用于易(yi)缩径的(de)淤泥粘土、易(yi)垮孔的(de)松散杂填(tian)土层(ceng)、砂(sha)层(ceng)和(he)严(yan)重透(tou)水性地层(ceng)。此时(shi),下护(hu)筒有两种方式:

a振动(dong)锤下(xia)(xia)护(hu)套(tao)(tao)(tao),由汽车起重(zhong)机或履带起重(zhong)机起重(zhong),电动(dong)或液压振动(dong)锤夹紧护(hu)套(tao)(tao)(tao)的高(gao)频振动(dong),使旋挖钻机护(hu)套(tao)(tao)(tao)在周围沙(sha)土(tu)液化重(zhong)力的作用(yong)下(xia)(xia)顺利切割,具有(you)下(xia)(xia)放和提升护(hu)套(tao)(tao)(tao)速度快、成(cheng)孔(kong)时采用(yong)干式成(cheng)孔(kong)法或天然(ran)水(shui),降低造浆成(cheng)本,开始下(xia)(xia)护(hu)套(tao)(tao)(tao)时应注(zhu)意调(diao)整(zheng)垂(chui)直(zhi)度。

b动(dong)(dong)力头(tou)驱动(dong)(dong)下护(hu)筒,利(li)用动(dong)(dong)力头(tou)反正旋转摩擦和加压(ya)缸加压(ya)将(jiang)护(hu)筒切入(ru)土中,其优点是(shi)操作(zuo)方便,以(yi)保了(le)钻(zuan)机(ji)护(hu)筒填(tian)充的夯实性,缩短(duan)了(le)钻(zuan)孔(kong)填(tian)充时间(jian),提高(gao)了(le)钻(zuan)机(ji)的孔(kong)效率。



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关键词:赣州钢护桶租赁,于都钢护桶租赁,龙南钢护桶租赁

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