gravel stratum 中文意思是什麼
gravel stratum
解釋
礫石層-
This drilling adopts crank connecting link and walking beam percussion mechanism, which make the drilling possess two percussive functions, normal drilling takes connecting link impact as main mode, when encountering special situation and the connecting link impact can not drill, it can transform into hoisting impact, the stroke length can be modulated, it realizes automatic percussive drilling due to continuous operating of connecting link percussive mechanism, these can enhance drilling efficiency and relieve labor intensity ; it adopts pumping reverse circulation to drain slag, which not only resolves the drilling difficulty in special stratum such as pebble and gravel stratum and hard stratum, but also resolves the problem that the percussive drill ' s efficiency is low ; it adopts spur gear differential mechanism as double cylinders lazy tongs of main hoist, which not only ensures the balance state of drilling tool, but also reduces the mechanical design, and reduces the cost ; the bottom plate traveling motion of this drilling machine adopts walking type ; the drilling tower adopts hydraulic pressure uprising, and reduces the assistant operating time
該鉆機採用曲柄連桿、游梁式沖擊機構，使鉆機具有兩種沖擊功能;正常鉆進以連桿沖擊為主，遇到特殊情況，用連桿沖擊不能鉆進時，可轉為卷揚沖擊，沖程可調，因連桿沖擊機構連續工作，所以實現了自動沖擊鉆進，可提高鉆進效率，減輕勞動強度;採用泵吸反循環的方式排渣，既能有效解決卵礫石地層、堅硬地層等特殊地層鉆進的困難，又很好地解決了沖擊鉆機效率低下的問題;採用直齒圓柱齒輪差速機構作為主卷揚的雙筒同步機構，既保證了鉆具處于平衡狀態，又大大簡化了該機構設計，降低了成本;該鉆機底盤行走移位採用步履式;鉆塔採用液壓起立，減少了輔助作業時間。 -
Owing to complicated earth ' s surface condition such as the steep stratum outcropping of front - zone of mountain or the huge thick gravel stratum ' s overlay and earth ' s surface large undulation, complicated underground geology structure developed extremely such as thrust and overthrust nappe, and violent change of the lateral velocity, etc. in front - zone of mountain there are a series of problems such as serious secondary disturbance and low signal - to - noise ratio in seismic exploration gathering
由於山前帶高陡巖層出露或巨厚礫石層的覆蓋、地表起伏大等復雜的地表條件、逆沖和逆掩推覆等復雜地下地質構造發育、速度橫向變化劇烈等原因，造成了山前帶地震勘探資料採集存在次生干擾嚴重和信噪比低等一系列問題。 -
Study of blasting techniques of frozen gravel stratum in vertical well tunneling
立井掘進凍結礫石層爆破技術初步研究 -
In gravel stratum, the method combined soil nails and anchor pile is adopted in deep foundation pit bracing, it can obviously cut down engineering cost, raise efficiency and shorten construction period
在卵礫石地層中，採用土釘和錨桿樁聯合支護技術進行深基坑支護，節省工程投資，提高工效，縮短施工工期。 -
Smoothness control of cement stabilized gravel stratum
水泥穩定粒料基層平整度控制 -
The bridge is located on the alluvial plain in the front of pearl river sloping field. its piles pass through weak soil layer, sandy clay and gravel stratum ; piles " sustaining layer sits in weak - weathering or faint - weathering mudstone
該橋位於珠江三角洲坡前沖積平原，採用樁基穿越軟土、亞粘土、砂土和礫砂，持力層置於弱風化和微風化的泥質砂巖和泥灰巖夾泥巖中。 -
On the other hand, gravel ground condition is a good bearing stratum for piles, which is often met with in civil construction
另外，卵石地層是土木工程建設經常遇到的地質條件，是樁基良好的持力層。 -
The stroke reverse circulation drilling machine of czf2000 - 1800 type is produced by our company newly to adapt to the demand of percussion drill market due to the development of road and bridge industry, it is specializedly used for pore forming of pebble and gravel stratum and hard stratum
1800型沖擊反循環鉆機是我公司最新研製生產的為適應我國路橋事業發展對沖擊鉆機市場的需求，專門用於卵礫石地層、堅硬地層中成孔的鉆機。 -
Through grouting practice of design and construction, it is proved feasible and cheaper to use dam heavy curtain grouting technology for leakproof and bracing for foundation pit in the sandy gravel stratum
通過一灌漿工程設計和施工實踐，說明了在含水量高補給充分的砂礫卵石層中運用大壩帷幕灌漿技術進行基坑止水和支護的可行性和經濟性。 -
Construction of cement stabilized gravel stratum and quality control in expressway project
高速公路水泥穩定碎石上基層施工與質量控制 -
Abstract : the traditional method of anchor pile on the deep foundation pit bracing in the gravel stratum with high hardness, poor drilling and easy slump is complicated owing to difficult construction, low efficiency and high cost
文摘:卵礫石地層硬度大，可鉆性差，易坍塌，這種地層的深基坑支護若採用傳統的錨桿樁，施工難度大，工效低，工程造價高。
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