關(guān)鍵詞:稻雞 板樹碼頭 降水 位移

The impact on sheet-pile wharf in sandy foundation due to foundation pit dewatering

MA Yong-ping HUANG Hai-yun

(China Shipbuilding NDRI Engineering Co.,Lid.,)

Abstract:During dry dock construction in sandy site,the dewatering of dock foundation pit affects the displacemen of sheet-pile wharf nearby. It can even appear the phenomenon that the sheet pile wall moves to the shore side. Based on a new shipyard project in Singaporethis paper presents the analysis and rescarch for the results of the sheet pile wall displacement monitoring during the dewatering work, and also presents numerical simulation by the application of finite element program PLAXIS.The result of numerical simulation further verified the correctness of the results of displacement monitoring.

Key words: Dry dock, sheet-pile wharf, dewatering, displacement 

4 結(jié)論

本文結(jié)合新加坡某新建船廠工程，對(duì)板樁位移的實(shí)際監(jiān)測(cè)成果進(jìn)行分析與研究，并應(yīng)用PLAXIS有限元程序進(jìn)行數(shù)值模擬計(jì)算，得到如下結(jié)論:

(1) 在強(qiáng)透水性的砂性地基中,板樁碼頭后方如有大面積基坑降水情況，在降水過(guò)程中碼頭的位移會(huì)有明顯減小，甚至?xí)霈F(xiàn)板樁墻的位移整體向岸側(cè)移動(dòng)的現(xiàn)象

(2)PLAXIS有限元模擬計(jì)算的碼頭位移趨勢(shì) 與實(shí)測(cè)結(jié)果的位移趨勢(shì)完全一致，可以說(shuō)明，有限元計(jì)算模型的選取，工況、設(shè)計(jì)參數(shù)的設(shè)置與實(shí)際情況較相符合，可以為以后相似直立式駁岸工程計(jì)算提供較可靠的依據(jù)。

(3)板樁碼頭后方大面積基坑降水可作為施工期控制碼頭位移的措施，并提高施工期的安全系數(shù)。

參考文獻(xiàn)

[1]BS6349 Marine structures -Part 1:Code of  practice for general criteria.[S]

    [2]BS6349 Marine structures -Part 2:Design of quay walls, jetties and dolphins. [S] 

作者簡(jiǎn)介:黃海云(1979-),男,本科,工程師,主要從事水工及特種工程、巖土工程等領(lǐng)域的工程設(shè)計(jì)工作。