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赣州钢护桶出租厂家介绍钢护桶的作用及注意事项

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赣州钢护桶出租厂家介绍钢护桶的作用及注意事项

发布日期:2018-08-22 作者:www.gzsshjs.com 点击:

  赣州钢护桶出租厂家介绍钢护桶的作用及注意事项

  钢护桶出租产品用于钻孔灌注桩施工作业,为钢材制作,圆柱状。一般为钢护筒,壁厚10mm。一般作为施工预防固定作用。护桶连接处要求筒内无突出物,应耐拉、压,不漏水。

  在钻孔灌注桩中(zhong),常埋(mai)设钢(gang)护(hu)(hu)(hu)(hu)(hu)(hu)(hu)筒(tong)(tong)来定(ding)位(wei)需(xu)要钻的桩位(wei)。护(hu)(hu)(hu)(hu)(hu)(hu)(hu)桶为(wei)钢(gang)护(hu)(hu)(hu)(hu)(hu)(hu)(hu)桶,壁厚10mm,护(hu)(hu)(hu)(hu)(hu)(hu)(hu)桶定(ding)位(wei)时,先(xian)以桩位(wei)中(zhong)心为(wei)圆心,根据护(hu)(hu)(hu)(hu)(hu)(hu)(hu)桶半径(jing)在土上(shang)定(ding)出(chu)护(hu)(hu)(hu)(hu)(hu)(hu)(hu)筒(tong)(tong)位(wei)置,护(hu)(hu)(hu)(hu)(hu)(hu)(hu)筒(tong)(tong)就位(wei)后(hou),施(shi)加压力(li)将护(hu)(hu)(hu)(hu)(hu)(hu)(hu)筒(tong)(tong)埋(mai)入约(yue)50cm。如(ru)下压困难,可(ke)先(xian)将孔位(wei)处的土体挖出(chu)一(yi)部(bu)分,然后(hou)安放护(hu)(hu)(hu)(hu)(hu)(hu)(hu)筒(tong)(tong)埋(mai)入地下。在埋(mai)入过程中(zhong)应检查护(hu)(hu)(hu)(hu)(hu)(hu)(hu)筒(tong)(tong)是否(fou)垂直(zhi),若发现偏斜,应及(ji)时纠正。陆(lu)上(shang)护(hu)(hu)(hu)(hu)(hu)(hu)(hu)筒(tong)(tong)埋(mai)放就位(wei)后(hou),将护(hu)(hu)(hu)(hu)(hu)(hu)(hu)筒(tong)(tong)外(wai)侧用粘(zhan)土回填(tian)(tian)压实(shi),以防止护(hu)(hu)(hu)(hu)(hu)(hu)(hu)筒(tong)(tong)四周出(chu)现漏水现象,回填(tian)(tian)厚度(du)约(yue)40-45cm,顶(ding)端(duan)高(gao)度(du)高(gao)出(chu)(水面)地面0.4-0.6m, 筒(tong)(tong)位(wei)距孔心偏差不得大于50mm。

  钢(gang)护桶的作用(yong)是:

1、定位;

2、保(bao)护(hu)孔(kong)口,以(yi)及防止(zhi)地面石块掉入孔(kong)内(nei);

3、保(bao)持泥浆(jiang)水位(压(ya)力(li)),防止(zhi)坍(tan)孔;

4、桩顶标(biao)高控制(zhi)依据(ju)之(zhi)一(yi);

5、防止钻孔过程中的(de)沉渣回流。

 注意事项:

1、护桶内径(jing)宜比(bi)桩径(jing)大20~40cm。

2、护桶中心竖(shu)直(zhi)(zhi)线应与桩中心线重(zhong)合,除设计另有规定外,平面允许(xu)误(wu)差(cha)为(wei)50MM,竖(shu)直(zhi)(zhi)线倾斜不(bu)大于1%,干处可实测定位,水域可依靠导向架定位。

3、旱(han)地、筑岛处护筒可采用挖坑埋设法,护筒底部和四周所填粘质土必须分层夯实(shi)。

4、水(shui)域护桶(tong)设置,应严格注意平面位置、竖向倾斜(xie)和两(liang)节护筒(tong)的(de)(de)连接质量均需符合(he)上述要求(qiu)。沉入时可采用压(ya)重(zhong)、振(zhen)动(dong)、锤击并辅以筒(tong)内(nei)除土的(de)(de)方法(fa)。

赣州钢护桶出租厂家


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