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　　5月6日，青(qing)(qing)藏(zang)交直(zhi)流聯網工(gong)(gong)(gong)程建設總(zong)指揮部組織中(zhong)國科學院(yuan)(yuan)(yuan)寒區(qu)旱區(qu)環境與工(gong)(gong)(gong)程研(yan)究所(suo)凍土(tu)工(gong)(gong)(gong)程國家(jia)重點實驗(yan)室(shi)、中(zhong)國科院(yuan)(yuan)(yuan)寒旱所(suo)以及相關電力設計院(yuan)(yuan)(yuan)召開了青(qing)(qing)藏(zang)直(zhi)流聯網線(xian)路(lu)工(gong)(gong)(gong)程凍土(tu)基(ji)礎(chu)(chu)穩(wen)(wen)(wen)定(ding)性階段(duan)分析研(yan)討(tao)會，對全線(xian)各標(biao)段(duan)高(gao)原凍土(tu)基(ji)礎(chu)(chu)觀測數據進行了研(yan)討(tao)、分析和評價凍土(tu)區(qu)基(ji)礎(chu)(chu)穩(wen)(wen)(wen)定(ding)現狀，為實施(shi)架線(xian)轉序工(gong)(gong)(gong)作提供依據和指導(dao)。經過專家(jia)們(men)的(de)分析、論證(zheng)，確認了凍土(tu)區(qu)基(ji)礎(chu)(chu)基(ji)本穩(wen)(wen)(wen)定(ding)，標(biao)志著(zhu)青(qing)(qing)藏(zang)直(zhi)流線(xian)路(lu)架線(xian)施(shi)工(gong)(gong)(gong)即將全面展(zhan)開。

　　一是(shi)明確青藏(zang)交(jiao)直(zhi)流聯(lian)網工程年內雙極投運(yun)“只許成功，務期必(bi)成”的工作目(mu)標(biao)。青藏(zang)交(jiao)直(zhi)流聯(lian)網工程凍(dong)土(tu)基(ji)礎穩定(ding)性是(shi)決定(ding)工程關(guan)(guan)(guan)(guan)鍵(jian)技術和關(guan)(guan)(guan)(guan)鍵(jian)質量控制點，是(shi)決定(ding)直(zhi)流線(xian)路能否安全穩定(ding)運(yun)行(xing)的關(guan)(guan)(guan)(guan)鍵(jian)，各(ge)施工單位要充分認識工程的重要性，對(dui)工程高(gao)原凍(dong)土(tu)基(ji)礎的關(guan)(guan)(guan)(guan)鍵(jian)技術、關(guan)(guan)(guan)(guan)鍵(jian)控制點要繼續進(jin)行(xing)深(shen)入研究，保證工程建設目(mu)標(biao)任務的順利實現。

　　二是(shi)深化凍(dong)(dong)土(tu)基(ji)(ji)(ji)礎(chu)(chu)(chu)科(ke)(ke)研(yan)課題的(de)(de)(de)(de)研(yan)究(jiu)(jiu)。青(qing)藏聯網(wang)直(zhi)流線(xian)路工(gong)程凍(dong)(dong)土(tu)基(ji)(ji)(ji)礎(chu)(chu)(chu)隨(sui)著高原氣候的(de)(de)(de)(de)變化以及(ji)(ji)組(zu)塔(ta)、架線(xian)等人(ren)為(wei)(wei)活(huo)動(dong)(dong)的(de)(de)(de)(de)干(gan)擾(rao)，會對基(ji)(ji)(ji)礎(chu)(chu)(chu)產(chan)生不(bu)同程度的(de)(de)(de)(de)擾(rao)動(dong)(dong)，為(wei)(wei)確保工(gong)程穩(wen)(wen)定(ding)運行目(mu)標的(de)(de)(de)(de)實現(xian)(xian)及(ji)(ji)工(gong)程質量控制，科(ke)(ke)研(yan)單位持續開展凍(dong)(dong)土(tu)基(ji)(ji)(ji)礎(chu)(chu)(chu)穩(wen)(wen)定(ding)性分(fen)析(xi)(xi)研(yan)究(jiu)(jiu)工(gong)作，為(wei)(wei)本工(gong)程凍(dong)(dong)土(tu)基(ji)(ji)(ji)礎(chu)(chu)(chu)穩(wen)(wen)定(ding)性分(fen)析(xi)(xi)提(ti)供(gong)了科(ke)(ke)學的(de)(de)(de)(de)依據和有效(xiao)支撐；繼續深化現(xian)(xian)場(chang)基(ji)(ji)(ji)礎(chu)(chu)(chu)試驗(yan)的(de)(de)(de)(de)研(yan)究(jiu)(jiu)，對現(xian)(xian)場(chang)采集(ji)的(de)(de)(de)(de)數據加大分(fen)析(xi)(xi)力(li)度，及(ji)(ji)時(shi)進行仿真計算，提(ti)供(gong)凍(dong)(dong)土(tu)塔(ta)基(ji)(ji)(ji)地溫場(chang)、變形場(chang)變化規律，提(ti)出不(bu)同階段工(gong)程穩(wen)(wen)定(ding)性的(de)(de)(de)(de)評價結果；拓展研(yan)究(jiu)(jiu)范圍，在不(bu)同的(de)(de)(de)(de)受(shou)力(li)條件(jian)、環境(jing)溫度變化情況下，針對塔(ta)基(ji)(ji)(ji)基(ji)(ji)(ji)礎(chu)(chu)(chu)的(de)(de)(de)(de)受(shou)力(li)特性及(ji)(ji)穩(wen)(wen)定(ding)性以及(ji)(ji)基(ji)(ji)(ji)礎(chu)(chu)(chu)對周(zhou)邊環境(jing)影(ying)響(xiang)，建(jian)立(li)每一級(ji)基(ji)(ji)(ji)礎(chu)(chu)(chu)的(de)(de)(de)(de)檔案資(zi)料；5月(yue)份是(shi)凍(dong)(dong)土(tu)基(ji)(ji)(ji)礎(chu)(chu)(chu)從凍(dong)(dong)到融的(de)(de)(de)(de)關鍵時(shi)期，也是(shi)考驗(yan)凍(dong)(dong)土(tu)基(ji)(ji)(ji)礎(chu)(chu)(chu)施工(gong)質量的(de)(de)(de)(de)關鍵階段，各施工(gong)及(ji)(ji)監理(li)單位要進一步加強基(ji)(ji)(ji)礎(chu)(chu)(chu)沉降、位移動(dong)(dong)態觀測力(li)度，派專人(ren)做好(hao)凍(dong)(dong)土(tu)基(ji)(ji)(ji)礎(chu)(chu)(chu)回填及(ji)(ji)融沉的(de)(de)(de)(de)巡視排(pai)查。

　　三(san)是持續開展凍(dong)土(tu)基礎(chu)相關(guan)參數的(de)(de)復核工(gong)作。各設計單位要(yao)(yao)結合地(di)(di)溫(wen)的(de)(de)變化，動態(tai)的(de)(de)對基礎(chu)的(de)(de)地(di)(di)質條件及設計參數進(jin)行(xing)校核，要(yao)(yao)特別關(guan)注(zhu)高溫(wen)高含冰(bing)區域地(di)(di)質條件變化對凍(dong)土(tu)基礎(chu)的(de)(de)影響，確保凍(dong)土(tu)基礎(chu)的(de)(de)穩定性。

　　四是繼續進(jin)行樣板引(yin)路，嚴格(ge)落實(shi)施(shi)(shi)(shi)工(gong)組織方案。針對當前氣候回(hui)暖，全(quan)線(xian)部分(fen)區域凍(dong)土進(jin)入了融(rong)化(hua)期，架(jia)線(xian)施(shi)(shi)(shi)工(gong)將對基(ji)礎的(de)穩定(ding)性(xing)產生一(yi)定(ding)的(de)影響，為確保凍(dong)土基(ji)礎在架(jia)線(xian)階段的(de)穩定(ding)性(xing)，全(quan)線(xian)施(shi)(shi)(shi)工(gong)單(dan)位將開展架(jia)線(xian)施(shi)(shi)(shi)工(gong)科技創新(xin)活動及施(shi)(shi)(shi)工(gong)方法(fa)研究，推行相關示范工(gong)藝樣板引(yin)路，不斷提高施(shi)(shi)(shi)工(gong)工(gong)藝質(zhi)量，提升(sheng)工(gong)程(cheng)建(jian)設(she)品(pin)質(zhi)。

　　五是(shi)深化凍(dong)(dong)(dong)土(tu)基礎(chu)安(an)全穩(wen)定(ding)(ding)性措施及(ji)預案。根(gen)據凍(dong)(dong)(dong)土(tu)基礎(chu)科研課題分(fen)(fen)析結果(guo)、現場檢查數據以及(ji)凍(dong)(dong)(dong)土(tu)基礎(chu)回凍(dong)(dong)(dong)情況的監(jian)測結果(guo)，青藏(zang)聯網(wang)直流線路工程部分(fen)(fen)凍(dong)(dong)(dong)土(tu)基礎(chu)有一定(ding)(ding)的偏(pian)差，但在控制范圍(wei)之內，為保(bao)證凍(dong)(dong)(dong)土(tu)基礎(chu)動態穩(wen)定(ding)(ding)變(bian)化，制定(ding)(ding)切實(shi)有效的安(an)全措施及(ji)應(ying)急預案，確保(bao)高原(yuan)凍(dong)(dong)(dong)土(tu)基礎(chu)穩(wen)定(ding)(ding)性和運行的穩(wen)定(ding)(ding)性。

　　六是根據工(gong)程(cheng)(cheng)里(li)程(cheng)(cheng)碑計劃(hua)(hua)，總(zong)指揮部加強對各施(shi)(shi)工(gong)標(biao)段架(jia)線(xian)施(shi)(shi)工(gong)組織方案、二三級網(wang)絡計劃(hua)(hua)的(de)評(ping)審(shen)，并(bing)全面(mian)做好(hao)架(jia)線(xian)轉序(xu)驗(yan)收(shou)工(gong)作，確保架(jia)線(xian)施(shi)(shi)工(gong)的(de)有(you)序(xu)開展；各施(shi)(shi)工(gong)單位根據已審(shen)定(ding)的(de)方案合理安(an)排整體(ti)工(gong)程(cheng)(cheng)施(shi)(shi)工(gong)時序(xu)，落實人員及機具(ju)準備情況，切實確保青(qing)藏聯網(wang)工(gong)程(cheng)(cheng)直流線(xian)路架(jia)線(xian)轉序(xu)有(you)序(xu)進展。