正反作法施(shi)(shi)(shi)工是(shi)(shi)指在(zai)圍護結(jie)(jie)構(gou)和工程樁(zhuang)完成后(hou)，不進(jin)行大開(kai)挖，而是(shi)(shi)直接對地下(xia)結(jie)(jie)構(gou)頂板(ban)(ban)進(jin)行施(shi)(shi)(shi)工或開(kai)挖一定(ding)深(shen)度(du)后(hou)，再對地下(xia)結(jie)(jie)構(gou)頂板(ban)(ban)、中(zhong)間柱(zhu)進(jin)行施(shi)(shi)(shi)工。在(zai)鋼(gang)板(ban)(ban)樁(zhuang)鎖口(kou)處涂上黃油，以減少插接時鎖口(kou)間的摩(mo)擦，并(bing)減少鋼(gang)板(ban)(ban)樁(zhuang)圍堰(yan)的滲漏。鋼(gang)板(ban)(ban)樁(zhuang)導(dao)(dao)向裝置安裝；量測放樣，設(she)定(ding)位樁(zhuang)。按(an)定(ding)位樁(zhuang)安裝導(dao)(dao)架(jia)。按(an)板(ban)(ban)樁(zhuang)圍堰(yan)高度(du)計算。在(zai)施(shi)(shi)(shi)工過程中(zhong)，可能由水位、沉井(jing)頂部高度(du)、波浪(lang)高度(du)以及沉井(jing)的超下(xia)沉等因(yin)素決定(ding)。建(jian)筑物改造施(shi)(shi)(shi)工單位。建(jian)筑鉆孔(kong)(kong)(kong)(kong)類，主要包括墻孔(kong)(kong)(kong)(kong)、板(ban)(ban)孔(kong)(kong)(kong)(kong)、地孔(kong)(kong)(kong)(kong)、橋孔(kong)(kong)(kong)(kong)、梁孔(kong)(kong)(kong)(kong)、柱(zhu)孔(kong)(kong)(kong)(kong)、墻孔(kong)(kong)(kong)(kong)、大理石孔(kong)(kong)(kong)(kong)和各種混凝土結(jie)(jie)構(gou)孔(kong)(kong)(kong)(kong)等。

針(zhen)對地(di)(di)(di)質(zhi)條件及所選鋼(gang)(gang)(gang)板(ban)樁(zhuang)規(gui)格，鋼(gang)(gang)(gang)板(ban)租賃(lin)公(gong)司，我項目部在鋼(gang)(gang)(gang)板(ban)樁(zhuang)施(shi)工(gong)中，采(cai)用液壓(ya)(ya)振動打(da)樁(zhuang)機。吊裝(zhuang)設備配(pei)(pei)置為50t履帶吊車。隨(sui)著中國城(cheng)市建(jian)設的(de)(de)(de)跨越式發展，我國高層建(jian)筑地(di)(di)(di)基(ji)基(ji)礎(chu)(chu)與地(di)(di)(di)下(xia)(xia)(xia)室、大(da)型地(di)(di)(di)下(xia)(xia)(xia)商場、地(di)(di)(di)下(xia)(xia)(xia)停車場、地(di)(di)(di)下(xia)(xia)(xia)車站(zhan)、地(di)(di)(di)下(xia)(xia)(xia)交(jiao)通(tong)樞紐、地(di)(di)(di)下(xia)(xia)(xia)變電站(zhan)等大(da)型基(ji)礎(chu)(chu)工(gong)程在施(shi)工(gong)過程中遇到了大(da)量(liang)深基(ji)坑問題(ti)。施(shi)工(gong)前，湖州鋼(gang)(gang)(gang)板(ban)租賃(lin)，應(ying)了解施(shi)工(gong)現場周圍情況，鋪路鋼(gang)(gang)(gang)板(ban)租賃(lin)，如建(jian)筑材料(liao)、地(di)(di)(di)質(zhi)狀(zhuang)況等。樁(zhuang)基(ji)礎(chu)(chu)的(de)(de)(de)裝(zhuang)配(pei)(pei)、試樁(zhuang)、拆卸均(jun)應(ying)按照使用說(shuo)明(ming)書規(gui)定的(de)(de)(de)速度(du)進行。在河(he)床面以下(xia)(xia)(xia)的(de)(de)(de)沉井上，為便于沉井下(xia)(xia)(xia)沉，不宜在沉井上設置伸(shen)臂式托盤(pan)，此時鋼(gang)(gang)(gang)板(ban)樁(zhuang)圍堰(yan)(yan)(yan)的(de)(de)(de)外(wai)(wai)徑(jing)要小于沉井的(de)(de)(de)外(wai)(wai)徑(jing)。支撐鋼(gang)(gang)(gang)板(ban)樁(zhuang)托盤(pan)槽(cao)口外(wai)(wai)側應(ying)設置鋼(gang)(gang)(gang)條，鋼(gang)(gang)(gang)條強(qiang)度(du)應(ying)能滿足圍堰(yan)(yan)(yan)施(shi)工(gong)過程中內外(wai)(wai)水(shui)頭(tou)差產生的(de)(de)(de)較大(da)壓(ya)(ya)力，以防(fang)止鋼(gang)(gang)(gang)板(ban)樁(zhuang)在圍堰(yan)(yan)(yan)中炸裂。

邊(bian)抽邊(bian)裝，抽完后(hou)每隔1米抽一次(ci)(ci)，以(yi)穩定地使內(nei)支撐(cheng)受力，并(bing)及時(shi)(shi)堵漏(lou)。內(nei)托(tuo)架(jia)(jia)安(an)裝注意(yi)事項：a、應(ying)嚴格(ge)按照設計內(nei)托(tuo)架(jia)(jia)的數(shu)量(liang)進行安(an)裝；b、內(nei)托(tuo)架(jia)(jia)隨抽水標(biao)高(gao)(gao)及時(shi)(shi)安(an)裝c、內(nei)托(tuo)架(jia)(jia)安(an)裝時(shi)(shi)嚴格(ge)控制焊縫(feng)質量(liang)。板(ban)(ban)(ban)(ban)樁(zhuang)(zhuang)(zhuang)(zhuang)圍堰(yan)采用I40b型鋼(gang)為內(nei)導框，其作(zuo)用是起鋼(gang)板(ban)(ban)(ban)(ban)樁(zhuang)(zhuang)(zhuang)(zhuang)的導引作(zuo)用，可以(yi)兼(jian)做(zuo)施(shi)工(gong)(gong)(gong)平(ping)臺，也可以(yi)用作(zuo)施(shi)工(gong)(gong)(gong)平(ping)臺。只要(yao)適(shi)合打(da)(da)樁(zhuang)(zhuang)(zhuang)(zhuang)錘的種類及其相應(ying)的系數(shu)適(shi)宜(yi)(yi)，各種打(da)(da)樁(zhuang)(zhuang)(zhuang)(zhuang)機具都可以(yi)用來打(da)(da)鋼(gang)板(ban)(ban)(ban)(ban)樁(zhuang)(zhuang)(zhuang)(zhuang)。板(ban)(ban)(ban)(ban)樁(zhuang)(zhuang)(zhuang)(zhuang)堆(dui)放(fang)在(zai)(zai)板(ban)(ban)(ban)(ban)樁(zhuang)(zhuang)(zhuang)(zhuang)堆(dui)放(fang)的地點，應(ying)選擇(ze)不(bu)應(ying)受壓重而產生較大的沉陷變(bian)形，且平(ping)整、堅(jian)固，便于運至打(da)(da)樁(zhuang)(zhuang)(zhuang)(zhuang)施(shi)工(gong)(gong)(gong)現場。堆(dui)料應(ying)注意(yi)堆(dui)料順序、位置、方向、平(ping)面布置等要(yao)考慮后(hou)期(qi)施(shi)工(gong)(gong)(gong)，鋼(gang)板(ban)(ban)(ban)(ban)樁(zhuang)(zhuang)(zhuang)(zhuang)按型號、規格(ge)、長度(du)分別堆(dui)料，并(bing)在(zai)(zai)堆(dui)料處(chu)有(you)標(biao)識說明(ming)。鋼(gang)板(ban)(ban)(ban)(ban)樁(zhuang)(zhuang)(zhuang)(zhuang)吊(diao)裝裝卸鋼(gang)板(ban)(ban)(ban)(ban)樁(zhuang)(zhuang)(zhuang)(zhuang)時(shi)(shi)，宜(yi)(yi)采用二點吊(diao)法(fa)。鋼(gang)板(ban)(ban)(ban)(ban)樁(zhuang)(zhuang)(zhuang)(zhuang)根數(shu)每次(ci)(ci)提升不(bu)應(ying)過(guo)高(gao)(gao)，不(bu)宜(yi)(yi)過(guo)高(gao)(gao)。