頂砂層 的英文怎麼說
中文拼音 [dǐngshācéng]
頂砂層
英文
top sand-
Based on the observation and statistics on the calcareous sandstone in the ore host layer in shihongtan uranium deposit, this paper finds that the calcareous sandstone occurs on and off near the top or wash surface of the sandbody as beads - strings lens along the layer and concentres in the area where the orebodies are rich
摘要通過對十紅灘鈾礦床容礦層鈣質砂巖的觀察和統計，發現鈣質砂巖呈順層、斷續的串珠狀透鏡體分佈，產出空間位置為砂體的頂底部或沖刷面，而且較集中的分佈在礦體發育區。Based on the bedding features of weak intercalations in sandstone plates near the top of underground cavity, the probable failure scale of bedding sliding, the probable settlement, the folding places and the critical length of sandstone beams are computed seperately, then the stability of underground cavity is analysed
針對地下工程頂部層狀砂巖中存在順層發育軟弱夾層的情況，分別對開挖后可能出現的層間滑動破壞范圍、巖板的沉降、折斷和臨界長度進行計算，並分析其穩定性。Main factors and mechanics influencing water inrush from roof snadstone
影響徐州礦區煤層頂板砂巖涌水的主要因素及機理Grain gradation, from coarser below to finer above in repeated, truncated sequences within the ellerslie sandstone is also evident.
在埃勒斯萊砂巖層段內，重復出現的截頂層序中，自下而上，由粗變細的粒級遞變也是明顯的。The time corresponding to the four parts along the section are as follows : the top lake - swamp sediments : holocene ; the uppart fine sand : later late pleistocene ; the middlepart sandy clay : middle - early late pleistocene ; the lowpart clayer silt : later - middle - pleistocene. the fossils and stone artifacts found in salawusu site should be formed during the last but one glacier, its age range is about 0. 13 - 0. 19 ma, and belongs to later middle - pleistocene
分析q曲線與氧同位素曲線的一致性以及以上研究結果，包含薩拉烏蘇地層的這套沉積物的沉積時代為：頂部湖沼相沉積物：全新世；上部具交錯層理的細砂：晚更新世晚期；中部粉砂質粘土：晚更新世中期至早期；下部粘土質粉砂：中更新世晚期。Moreover, we also gave some theoretical studies on the resistant pipe - pushing construction technique for middle and long distance high pipes in sand soil layers, from which not only the difficulties in the rain pipe construction problem in jianyu road of yulin city have been overcome successfully, but also the new and valuable techniques and experiences for the pipe - pushing construction in sand soil layers have been obtained
試驗研究表明上述技術措施的有效性，同時還對砂土層中長距離頂管法施工技術進行了一定的理論探討，從而使榆林市建榆路雨水管道頂管法施工開始完全不能進尺的僵局予以打破而且為砂土地層中頂管法施工提供了新的技術和經驗Five floating roof oil tanks with volume 2 104m3 are designed to be constructed at shuguang pump station possessed by liaohe oil field, which is located at liaohe delta alluvial plain. this engineering filed is featured with complicated topography. the oil tank foundation soil is horizontally - layered, including four layers : medium dense - dense clay, interbedding of find sand and clay, fine sand sandwiching clay and fine sand
位於遼河三角洲沖積平原的遼河油田曙光泵站計劃增建5座2 10 ~ 4m ~ 3浮頂式儲油罐，場區地形復雜，油罐地基土層分佈均勻水平，從上之下主要由中密粉土層、粉細砂與粘土互層、粉細砂夾粘土層和細砂層等4層組成。Railway jacking bridge engineering passing through sand pebble ( gravel ) layer, because it is a complex loose coarse fragment accumulation layer, the roadbed must be reinforced
摘要鐵路頂橋工程中遇到砂卵（礫）石層時，因砂卵（礫）石層是一種復雜鬆散粗碎屑堆積層，因此必須對鐵路路基進行加固。In order to optimize the parameters of running top coal under different coal and gangue fragmental size, on the basis of measuring and analyzing the distribution character of top - coal fragmental size, running top coal was studied for the coal seam with dead - unconsolidated thin sandstone roof by loose medium model experiment
摘要為了優化不同煤矸塊度條件下的放煤工藝參數，在實測分析頂煤破斷塊度分佈特點的基礎上，採用散體模型試驗的方法對煤層頂板為極鬆散細砂巖條件下的放煤工藝進行了研究。Experimental study on mechanical character of sandstone of the upper plank of coal bed under high temperature
煤層頂板砂巖高溫狀態下力學特徵試驗研究This paper introduces the limit - destruction theory to study and analyze the function - mechanism of sand cushion in the collective function of the piles and the earth, and then brings forward the regulating - equation of the stress ratio between the up - pile - soil and the top of pile concerning the sand cushion. its final calculating result basically tallies with the practical function conditions. this provides an alternative approach to the study of sand cushion
4在復合地基樁、土共同作用中，墊層的作用和機理，本文引入極限破壞理論對砂墊層作用機理進行分析研究，提出砂墊層的樁頂樁土應力比協調方程，其計算結果與實際作用情況較吻合，為砂墊層研究提供了一種思路。In this paper, in order to solve the difficulties in the rain pipe construction in jianyu road of yulin city, the pipe - pushing technique for the hand - type tool pipe in the sand soil layer has been researched by experiments in which many practice problems were considered such as the movement and deformation of sand soil, the difficulties for the pipe to enter the scheduled work soil, the collapse of excavation surface, the departure of pipe center and the difficulties to correct this departure. by both the calculations for the stabilities of back - supporting soil body and excavation surface and the theoretical analysis on the reasons for the departure ' s producing, some construction techniques were introduced and adopted in this paper which include not only the change and reinforcement to both the back - supporting soil body and the scheduled work soil body but also the settings of pipe cap, lattice and correcting system on the head of the tool pipe
本文針對榆林市建榆路雨水管道中遇到的技術難題，進行手掘式工具管砂土層頂管法施工技術試驗研究，在研究中考慮砂土層存在的后靠土體移位、變形，工具管難以進入出洞土體，挖掘面易坍塌、管道中心易偏差及難糾偏等問題，通過對后靠土體和挖掘面的穩定計算及偏差產生原因的理論分析，提出並採用后靠土體換填加固，出洞土體換填加固，以及在工具管頭部設置管帽、格柵、糾偏系統等技術措施Analysis and prevention measures of mine roof sandstone flood in panji - xieqiao mining area
潘謝礦區煤層頂板砂巖水害分析與防治措施Mechanical characteristics and cracking mechanism of coal roof sandstone under high temperature
煤層頂板砂巖在高溫下的力學特性及破壞機理分享友人