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　　5月6日，青(qing)藏交直(zhi)(zhi)流聯網工(gong)程(cheng)建設總指揮部組織中國科(ke)學院寒(han)區(qu)旱區(qu)環境與工(gong)程(cheng)研(yan)究(jiu)所凍(dong)土(tu)工(gong)程(cheng)國家重點實驗室(shi)、中國科(ke)院寒(han)旱所以(yi)及相關電力設計院召開(kai)了青(qing)藏直(zhi)(zhi)流聯網線(xian)(xian)路工(gong)程(cheng)凍(dong)土(tu)基(ji)(ji)礎穩(wen)定(ding)性階段分(fen)(fen)析研(yan)討(tao)會，對全(quan)線(xian)(xian)各標(biao)段高(gao)原凍(dong)土(tu)基(ji)(ji)礎觀測(ce)數據(ju)進行了研(yan)討(tao)、分(fen)(fen)析和(he)(he)評(ping)價凍(dong)土(tu)區(qu)基(ji)(ji)礎穩(wen)定(ding)現狀，為實施架(jia)線(xian)(xian)轉(zhuan)序工(gong)作提供依據(ju)和(he)(he)指導。經過專家們的(de)分(fen)(fen)析、論證，確認了凍(dong)土(tu)區(qu)基(ji)(ji)礎基(ji)(ji)本穩(wen)定(ding)，標(biao)志著青(qing)藏直(zhi)(zhi)流線(xian)(xian)路架(jia)線(xian)(xian)施工(gong)即(ji)將全(quan)面展開(kai)。

　　一(yi)是明確青藏(zang)交(jiao)直流(liu)聯網工程(cheng)(cheng)年內雙極投運(yun)“只許成(cheng)功，務期必成(cheng)”的工作目標(biao)。青藏(zang)交(jiao)直流(liu)聯網工程(cheng)(cheng)凍(dong)土(tu)基礎(chu)穩(wen)定性是決定工程(cheng)(cheng)關(guan)(guan)鍵(jian)技術和關(guan)(guan)鍵(jian)質量控制(zhi)點(dian)，是決定直流(liu)線路能(neng)否安全穩(wen)定運(yun)行(xing)的關(guan)(guan)鍵(jian)，各施工單位要充(chong)分認識工程(cheng)(cheng)的重要性，對工程(cheng)(cheng)高原凍(dong)土(tu)基礎(chu)的關(guan)(guan)鍵(jian)技術、關(guan)(guan)鍵(jian)控制(zhi)點(dian)要繼續進行(xing)深(shen)入(ru)研究，保(bao)證工程(cheng)(cheng)建設目標(biao)任務的順利實現。

　　二是(shi)(shi)深(shen)化(hua)(hua)凍(dong)(dong)(dong)土(tu)基(ji)(ji)(ji)礎(chu)科(ke)研課題的(de)研究。青藏(zang)聯網直(zhi)流線路工(gong)(gong)(gong)(gong)程(cheng)凍(dong)(dong)(dong)土(tu)基(ji)(ji)(ji)礎(chu)隨著高原(yuan)氣(qi)候(hou)的(de)變(bian)(bian)(bian)化(hua)(hua)以及(ji)組塔、架線等人為(wei)(wei)活動的(de)干擾，會對(dui)(dui)(dui)基(ji)(ji)(ji)礎(chu)產生不同(tong)程(cheng)度(du)的(de)擾動，為(wei)(wei)確保工(gong)(gong)(gong)(gong)程(cheng)穩(wen)定運行目標的(de)實(shi)現及(ji)工(gong)(gong)(gong)(gong)程(cheng)質(zhi)量(liang)控制，科(ke)研單(dan)位持續開展凍(dong)(dong)(dong)土(tu)基(ji)(ji)(ji)礎(chu)穩(wen)定性分析(xi)研究工(gong)(gong)(gong)(gong)作，為(wei)(wei)本工(gong)(gong)(gong)(gong)程(cheng)凍(dong)(dong)(dong)土(tu)基(ji)(ji)(ji)礎(chu)穩(wen)定性分析(xi)提供(gong)了(le)科(ke)學(xue)的(de)依據和有效(xiao)支撐；繼續深(shen)化(hua)(hua)現場(chang)基(ji)(ji)(ji)礎(chu)試驗(yan)的(de)研究，對(dui)(dui)(dui)現場(chang)采(cai)集(ji)的(de)數據加大分析(xi)力(li)度(du)，及(ji)時(shi)進(jin)行仿真(zhen)計算，提供(gong)凍(dong)(dong)(dong)土(tu)塔基(ji)(ji)(ji)地溫場(chang)、變(bian)(bian)(bian)形場(chang)變(bian)(bian)(bian)化(hua)(hua)規律，提出不同(tong)階段(duan)工(gong)(gong)(gong)(gong)程(cheng)穩(wen)定性的(de)評價結(jie)果；拓展研究范圍，在不同(tong)的(de)受力(li)條件、環境(jing)溫度(du)變(bian)(bian)(bian)化(hua)(hua)情況下，針(zhen)對(dui)(dui)(dui)塔基(ji)(ji)(ji)基(ji)(ji)(ji)礎(chu)的(de)受力(li)特性及(ji)穩(wen)定性以及(ji)基(ji)(ji)(ji)礎(chu)對(dui)(dui)(dui)周邊環境(jing)影響，建立每一(yi)級基(ji)(ji)(ji)礎(chu)的(de)檔案(an)資料；5月份是(shi)(shi)凍(dong)(dong)(dong)土(tu)基(ji)(ji)(ji)礎(chu)從凍(dong)(dong)(dong)到融(rong)的(de)關(guan)鍵(jian)時(shi)期(qi)，也(ye)是(shi)(shi)考驗(yan)凍(dong)(dong)(dong)土(tu)基(ji)(ji)(ji)礎(chu)施工(gong)(gong)(gong)(gong)質(zhi)量(liang)的(de)關(guan)鍵(jian)階段(duan)，各施工(gong)(gong)(gong)(gong)及(ji)監(jian)理(li)單(dan)位要進(jin)一(yi)步(bu)加強基(ji)(ji)(ji)礎(chu)沉(chen)降、位移動態觀(guan)測(ce)力(li)度(du)，派專(zhuan)人做好凍(dong)(dong)(dong)土(tu)基(ji)(ji)(ji)礎(chu)回填及(ji)融(rong)沉(chen)的(de)巡視排查(cha)。

　　三是持續(xu)開展(zhan)凍(dong)土(tu)基礎相關參(can)數的復核工作(zuo)。各(ge)設計(ji)單位要結合(he)地溫(wen)的變化(hua)，動態(tai)的對基礎的地質條(tiao)(tiao)件(jian)及(ji)設計(ji)參(can)數進(jin)行校核，要特別關注高(gao)溫(wen)高(gao)含(han)冰區域地質條(tiao)(tiao)件(jian)變化(hua)對凍(dong)土(tu)基礎的影響，確保凍(dong)土(tu)基礎的穩定性。

　　四是繼續進行樣板引路，嚴格落實施(shi)(shi)工(gong)(gong)組(zu)織(zhi)方案(an)。針對當前氣(qi)候回(hui)暖，全(quan)(quan)線部分區域凍土進入了融化期(qi)，架線施(shi)(shi)工(gong)(gong)將對基礎(chu)的穩定性(xing)產生一(yi)定的影響，為確保凍土基礎(chu)在架線階段的穩定性(xing)，全(quan)(quan)線施(shi)(shi)工(gong)(gong)單位將開展(zhan)架線施(shi)(shi)工(gong)(gong)科技(ji)創新活動及施(shi)(shi)工(gong)(gong)方法(fa)研究，推行相(xiang)關示范工(gong)(gong)藝(yi)樣板引路，不斷提(ti)高施(shi)(shi)工(gong)(gong)工(gong)(gong)藝(yi)質量(liang)，提(ti)升工(gong)(gong)程建(jian)設品質。

　　五是深化凍(dong)土(tu)(tu)基礎安(an)全穩(wen)(wen)定性(xing)措施及(ji)(ji)預案。根(gen)據(ju)凍(dong)土(tu)(tu)基礎科研課題分(fen)析結果、現場檢(jian)查數據(ju)以及(ji)(ji)凍(dong)土(tu)(tu)基礎回凍(dong)情況的監測(ce)結果，青藏(zang)聯網直(zhi)流線路工程部分(fen)凍(dong)土(tu)(tu)基礎有一定的偏差(cha)，但在控制(zhi)(zhi)范圍之內，為保證(zheng)凍(dong)土(tu)(tu)基礎動態(tai)穩(wen)(wen)定變化，制(zhi)(zhi)定切實有效的安(an)全措施及(ji)(ji)應急預案，確保高原凍(dong)土(tu)(tu)基礎穩(wen)(wen)定性(xing)和運(yun)行的穩(wen)(wen)定性(xing)。

　　六是根據工(gong)程(cheng)里程(cheng)碑計劃，總指揮部(bu)加強(qiang)對各施(shi)工(gong)標(biao)段(duan)架線(xian)施(shi)工(gong)組織(zhi)方案(an)、二三級(ji)網絡計劃的評審，并全面做好架線(xian)轉序驗收工(gong)作，確保架線(xian)施(shi)工(gong)的有序開展(zhan)；各施(shi)工(gong)單位(wei)根據已審定的方案(an)合理安(an)排整體工(gong)程(cheng)施(shi)工(gong)時(shi)序，落實(shi)人員及(ji)機具準備(bei)情況，切(qie)實(shi)確保青藏聯網工(gong)程(cheng)直流(liu)線(xian)路架線(xian)轉序有序進展(zhan)。