鉆平孔底 的英文怎麼說
中文拼音 [zhēnpíngkǒngde]
鉆平孔底
英文
counterbore-
Benthic foraminifer fauna, ams14c dating and acoustic sub - bottom profile was analyzed in the core ey02 - 2 and ey02 - 1 drilled from the muddy deposit in the middle southern yellow sea and the mid - shelf of north east china sea. considering the results of core qc2 ? dz4 and the standard oxygen isotope curves, we discussed the late - quaterenary paleo - environment evolution, benthic foraminifer fauna, paleo - climate, the climate events and water mass in postglacial period, average sedimentation rates, paleo - water depth, origin of sediments, average sea level rise rate in the shelf of south yellow sea and east china sea. at last we discussed the condition of sea level rise in the east china, green house effect and the protection of coastal zone
本文根據南黃海中部泥質區和東海中陸架的兩個鉆孔巖芯的古生物、 ams ~ （ 14 ） c測年、淺地層剖面等，參考qc _ 2 、 dz _ 4成果及標準氧同位素曲線探討了黃東海陸架晚第四紀古環境演化、底棲動物群特徵、古氣候、冰後期以來氣候事件、古水團、沉積速率、古水深、沉積物源、海平面平均上升率，討論目前中國東部海平面上升的狀況、溫室效應及海岸帶保護。Counterboring drill press
平底擴孔鉆床Railway fixed equipment. sawing and drilling of flat - bottom rails of types superior or equal to 26 kg m, of 60 g, 70 g grooved rails and their fischplates
鐵路固定設備.大於kg m的g g形平底軌及其魚尾板的切割和鉆孔Abstract : this article discusses the formation of the drilling rig platform, selection of the hole forming equipment and treatment of some incidents occurred during the construction of the bored pile foundation of the qi ? ao bridge in zhuhai under different geological conditions. it also studies such issues as the embedment of the steel casing and bottom elevation of the bored pile on the inclining rock and katarock
文摘:筆者介紹了淇澳橋主橋鉆孔灌注樁基樁施工中，在不同地質條件下，水上鉆機平臺的搭設、成孔設備的選型、事故的處理，並對鋼護筒的埋設及破碎帶傾斜巖面上鉆孔嵌巖面上鉆孔樁孔底標高問題作了探討The works included 24 bored piles of 2. 5 meters in diameter and 55 meters in depth, 500 meters long underground concrete diaphragm wall of 0. 8 meters thick and 25 meters deep, 450 pre - cast concrete pile of 0. 5 meters in diameter, 12 meters deep soil excavation with multi - layer post - tensioning shoring system, reinforced concrete pile caps and basement slabs
其工程內容包括了24支直徑2 . 5米，深達55米直入巖層的鉆孔樁，周長500米，深度25米，厚度0 . 8米的地下連續混凝土墻， 450支直徑0 . 5米預制混凝土樁， 12米深開挖，多層水平鋼支撐系統，混凝土樁承臺及地庫底板結構。On the basis of analyzing the rock mechanics, the bit working circumstance and property in the bottom hole of 6000m deep well, and making use of the former equipment such as a derrick, platforms etc, the paper demonstrates that the research and design of the mechanical device have been established including the high pressure simulating well bore, the high pressure connector between the static well bore and the rotating drill pipe, the high pressure simulating system of circulating fluid and the high pressure desander etc. the produce, control and dynamic analysis of the bottom hole four - dimensional pressure ( over burden, confined, pore and column pressure ) have been studied
本文在對井底巖石的受力狀態以及鉆頭的工作環境和特性加以分析的基礎上，藉助原有的井架、平臺等設備，研究設計了模擬6000米井底壓力壞境的高壓模擬井筒、鉆柱高壓轉聯器、鉆井液高壓模擬系統以及高壓除砂器等機械裝置，並研究了井底四維模擬壓力（上覆壓、圍壓、孔隙壓和液柱壓）的產生、控制及其控制的建模與模擬，從而實現井深至6000米的四維井底壓力環境的模擬。The paper draws some valuable conclusions : the limited bearing capacity of manual excavation filling pile is much higher than the limited bearing capacity of machine drilled filling pile ; through grouting injection around the pile shaft, the pile bearing capacity can be effectively improved ; proportion of resistance force around the pile side in total load is much larger than that of pressure on the pile tip, and the intensity of resistance force around the pile side is 30 - 50kpa on average
得出一些有價值的結論：人工挖孔灌注樁的極限承載力明顯高於鉆孔灌注樁的極限承載力；地下水位對樁基承載力有顯著影響；利用樁側注漿可有效提高樁的承載力；樁側摩阻力所佔總荷載的比例遠大於樁底壓力，樁側土的摩阻強度平均值為30 50kpa 。分享友人