The whole process of breakwater riprapping construction was monitored by the prototype monitoring device buried in the sand soft nappe 摘要通過埋設在砂肋軟體排上的原形觀測儀器,對防浪圍堤拋石施工過程進行了全程監測。
The temperature properties conditions of a traditional embankment and a ripped - rock embankment were contrasted by laboratory experiments 通過室內試驗研究了在相同溫度邊界條件下普通路基和拋石護坡路基的溫度分布特征,對比分析了兩種路基結構的溫度差異。
Technical thorny problems met during construction of cast - in - situ piles at riprap backfilling area and corresponding countermeasures are expounded to serve as a reference for similar engineering 摘要介紹爆破拋石回填區域鉆孔灌注樁施工中遇到的技術難題,并提出相應的處理措施。對類似工程部位施工有一定的借鑒作用。
The monitoring result proved that although the surface settlement velocity was rather great during the initial phase of enrockment , the foundation still maintained firm based on the integrated analysis of lateral displacement , lamination settlement and pore water pressure measurement 監測結果表明:盡管拋石初期地表沉降速率很大,但綜合測斜、分層沉降、孔隙水壓力觀測結果分析,地基依然保持穩定。
Adopting the construction scheme which combines iron - frame moulded board with unsegragating concrete underwater and encircling steel hoop on glass fiber reinforced plastic mortar pipes , the difficulty in construction of outfall in riprap mound within a short period period is overcome 摘要通過采用鋼框模板結合水下不離析混凝土以及對玻璃鋼夾砂排水管采用抱箍的施工方案,成功解決了在較短工期內完成拋石棱體中出水口施工難度大的問題。
According to many engineering blasting cases , in - depth analysis of underwater blasting mechanics , and discussion about the advantages of touch - ground charging for underwater rubble - mound foundation explosive compaction , it is proved that touch - ground charging method for explosive compaction results in good effect and is characterized by simple and feasible operation , and low cost , and thus well accepted by clients and construction units 摘要通過大量的工程爆破實例,深入的水下爆炸機理分析以及觸地布藥方式在水下拋石基床爆炸密實優越性的討論,充分表明采用觸地布藥方式實施爆炸密實的效果良好,操作簡單可行,節約工程成本,并得到了業主、施工單位的肯定和好評。
This paper introduces the application of high density resistivity method to detect the interface batween stone and earth in yuhuan county , zhejiang province and describes its basic working principles on electrodes arrangement , data collection and data processing , as well as , how to determine the interface of stone and earth 摘要敘述了高密度電法在某海堤堵壩拋石體與土層分介面探測中的應用,介紹了高密度電法電極排列、數據采集、資料處理等的基本原理及其對土石分介面的確定。
Results showed that the temperature distribution of the traditional embankment was asymmetrical ; the asymmetrical status was changed after ripped - rock revetment was installed and the soil under the ripped - rock was cooled obviously ; the ripped - rock revetment could cool embankment and adjust the temperature difference between the north - facing slope and the south - facing slope ; the ripped - rock revetment was an available technique to protect embankment from thawing settlement and longitudinal cracks in permafrost regions 結果表明:普通路基的陰陽坡兩側溫度分布極不對稱;鋪設拋石護坡后,這種狀況得到了很大改善,并且拋石護坡下土體溫度明顯降低;拋石護坡能夠降低路基溫度和調節路基陰陽坡的溫度差異;拋石護坡是多年凍土區防治路基融沉和縱向裂縫病害的一種可行措施。
In this thesis , first , reasons and factors for the stability of loose rock dams were summarized according to the field surveys and certain expert ' s experiences . then , researches on block stability problems were reviewed , and according to the relationship between grain size and incipient velocity , it is found that the block weight is in direct proportion to 6 - 9 power of incipient velocity , and 50 % increase of the velocity will result in about 40 times change of the block weight . after that , experiments were conducted in a flume , focusing on the relationship between incipient velocity and some main factors including block weight , water depth over the dam , cross - section size , block material and river bed material 本文首先根據散拋石壩損毀情況的現場調查資料,結合有關專家多年的整治經驗,總結出壩體的損毀原因及影響因素;對現有塊體穩定性的研究成果進行回顧和總結,并針對散拋石壩的直接損毀現象,結合山區河流的水流、地形特點,利用塊體粒徑與起動流速的關系,提出塊體穩定重量與起動流速高次方成正比的概念,流速50的增長可能導致塊體穩定重量接近40倍的變化;通過二維變坡水槽試驗,研究了壩體穩定的主要影響因素,包括塊體重量、壩頂水深、斷面尺寸、塊體材料(塊石和卵石兩種) 、護底等,結果表明對于山區河流,試圖僅僅通過增加壩體單個塊體重量或斷面尺寸來提高壩體穩定性效果甚微;最后,根據西部地區的自然、經濟、交通等條件,提出可以采用柔性混凝土鉸鏈體等一類整體性較好的護面層作為散拋石壩的防沖毀措施,以期取得良好的工程效果。
This paper expounds the necessity and key technologies for development of mechanized leveling , intelligentized detecting , major research route for the self - developed sit - on rubble bed leveling barge , together with its basic technical performance , leveling technology , and leveling quality , efficiency and precision 摘要介紹拋石基床機械化整平、智能化檢測等工藝開發的必要性和關鍵技術,以及自主開發的坐底式拋石基床整平船的主要研制思路、基本技術性能、整平工藝、整平質量、精度和效率。