ﺗم ﺗﻧﻔﯾذ ﺣﺎﺟز اﻷﻣواج اﻟرﺋﯾﺳﻲ ﻟﻣﯾﻧﺎء طراﺑﻠس اﻟﺑﺣري ﺑوﺿﻌﻪ اﻟﺣﺎﻟﻲ ﺧﻼل ﻓﺗرة اﻟﺳﺑﻌﯾﻧﯾﺎت ﺟراء اﻟﻌواﺻف اﻟﺗﻲ اﺟﺗﺎﺣت اﻟﻣﻧطﻘﺔ ﺧﻼل ﺑداﯾﺔ ،وﺑﻣﺟرد اﻧﺗﻬﺎﺋﻪ ﺗﻌرض اﻟﺣﺎﺟز ﻷﺿرار ﺑﺎﻟﻐﺔ اﻟﻣﺗﻣﺛل ﻓﻲ ﺳوء ﺗﻘدﯾر ،ﻧﺗﯾﺟﺔ ﻟﻘﺻور اﻟﺗﺻﻣﯾم،ﻣﻣﺎ أدى إﻟﻰ اﻧﻬﯾﺎر ﺑﻌض أﺟزاﺋﻪ ﺑﺎﻟﻛﺎﻣل،اﻟﺛﻣﺎﻧﯾﻧﺎت إﻟﻰ ﺣﺎﻓﺔ ،ﺧﻠف اﻟﻧﺗوءات اﻟﺻﺧرﯾﺔ ، وﺗﻐﯾﯾر ﻣوﺿﻊ اﻟﺣﺎﺟز ﻣن ﻣﺳﺎرﻩ اﻟﺳﺎﺑق ،اﻟﻣوﺟﺔ اﻟﺗﺻﻣﯾﻣﯾﺔ اﻟﺣﯾداﻟﺑﺣري. إﻻ ، وﻓﻘﺎً ﻹﻋﺎدة ﺗﻘﯾﯾم اﻟظروف اﻟﻣﻧﺎﺧﯾﺔ ﻟﻠﻣﻧطﻘﺔ ،ﺗم إﻋﺎدة ﺗﺻﻣﯾم اﻟﺣﺎﺟز 1982وﻓﻲ ﻋﺎم ﻣﻣﺎ أدى إﻟﻰ ،ﺳﻧﺔ 17 أن أﻋﻣﺎل إﻋﺎدة ﺗﺄﻫﯾل اﻟﺣﺎﺟز ﻟم ﺗﻧﻔد ﻟﻣدة زادت ﻋن ، ز ﯾﺎدة ﺣﺟم اﻷﺿرار ﺑﺎﻟﺗﺎﻟﻲ ﺗم إﻋﺎدة ، ﻟم ﯾﻌدﻣﻧﺎﺳﺑﺎً ﻟوﺿﻊ اﻟﺣﺎﺟز ﺣﯾﻧﻬﺎ 1982 إﻟﻰ اﻟﺣد اﻟذي أﻋﺗﺑرﻣﻌﻪ أن ﺗﺻﻣﯾم ﻋﺎم ﺗﺄﺧرت ﻣﺟدداً إﻟﻰ ،وﺗﻧﻔﯾذ اﻹﺻﻼﺣﺎت اﻟﻼزﻣﺔ ، إﻻ أن أﻋﻣﺎل إﻋﺎدة اﻹﻧﺷﺎء ،1999 اﻟﺗﺻﻣﯾم ﻓﻲ ﻋﺎم ﺳﻧﺔ أﺧرى، وﺑﺎﻟﺗﺎﻟﻲ ﺟﺎءت ﻫذﻩ اﻟدراﺳﺔ ﻟﺗﻘﯾﯾم ﻣدى ﻣﻼﺋﻣﺔ 11 أي ﻟﺣواﻟﻲ ،2010ﺑداﯾﺔ اﻟﻌﺎم ﺳواءً ﻣن ﺣﯾث اﺧﺗﻼف ﻣﺣددات اﻟﺗﺻﻣﯾم ،ﺗﺻﺎﻣﯾم اﻟﻣﺷروع ﻟﻠﺣﺎﻟﺔ اﻟﻔﻧﯾﺔ اﻟﻘﺎﺋم ﻋﻠﯾﻬﺎ اﻟﺣﺎﺟز ﺣﺎﻟﯾﺎً أو درﺟﺔ ﺗدﻫور اﻟﻌﻧﺎﺻر اﻟﺧرﺳﺎﻧﯾﺔ ﻟﻠﺣﺎﺟز، وﻗد ﺗم ذﻟك ﻣن ﺧﻼل ﻣﻘﺎرﻧﺔ اﻟﺑﯾﺎﻧﺎت اﻟﻣﺟﻣﻌﺔ و اﻟﺗﺻﻣﯾم . ﺑﻣﺎ ﺗم ﺗﺟﻣﯾﻌﻪ ﻣن ﺑﯾﺎﻧﺎت ﺣﺎﻟﯾﺔ ،1999 اﻟﻧﻬﺎﺋﻲ ﻟﻠﻣﺷروع ﻋﺎم و ﺧﻠﺻت اﻟدراﺳﺔ، إﻟﻰ أن اﻟﻣﻌطﯾﺎت اﻟﺗﻲ ﺑﻧﯾت ﻋﻠﯾﻬﺎ ﻣﺣددات اﻟﺗﺻﻣﯾم اﻷﺳﺎﺳﯾﺔ وﺧﺻوﺻﺎً اﻟﻣوﺟﺔ اﻟﺗﺻﻣﯾﻣﯾﺔ ﯾﻧﺑﻐﻲﻣراﺟﻌﺗﻬﺎ ﻣن ﺧﻼل ﻣﺎ ﻫو ﻣﺗﺎح ﻣن ﺑﯾﺎﻧﺎت ﻣﻧﺎﺧﯾﺔ ﺟدﯾدة، ﻛﻣﺎ أن طرق وﻛﻣﯾﺔ اﻹﺻﻼﺣﺎت اﻟﻣﻘﺗرﺣﺔ ﻟﻠﻌﻧﺎﺻر اﻟﺧرﺳﺎﻧﯾﺔ ﻟم ﺗﻌد ﻛﺎﻓﯾﺔ ﻟﻣﺎ ﺑﻠﻐﺗﻪ ﻫذﻩ اﻟﻌﻧﺎﺻر ﻣن أﺿرار. Abstract Been implemented breakwater's main port of Tripoli Maritime as it now stands during the seventies, and once it had completed was the barrier to damage, due to the storms that swept the region during the early eighties, which led to the collapse of some of its parts in full, as a result of inadequate design, of miscalculation wave design, and change position of the barrier from the previous track, behind the rocky outcrops, to the edge of the reef. In 1982 was the redesign of the barrier, according to a re-evaluation of the climatic conditions of the region, but the rehabilitation work on the barrier does not run out for a period in excess of 17 years, leading to increase the size of the damage, to the extent that I consider him that the design of 1982 is no longer appropriate for the development of barrier timely, therefore, been re-design in 1999, but that the work of re-construction, and implement the necessary reforms, delayed again to the beginning of the year 2010, ie about 11 years old again, and therefore this study was to assess the adequacy of project designs for the case of art based upon the barrier currently, both in terms of different design parameters or the degree of deterioration of the concrete elements of the barrier, has been done by comparing the data collected and the final design of the project in 1999, what has been compiled from the current dat The study concluded, that the data upon which the determinants of basic design, especially the wave design should be reviewed through the availability of a new climate data, and methods and the amount of proposed reforms of the concrete elements are no longer sufficient for the language of these elements of damage
أكرم البشير الشتيوي (2011)

Abstract In this study, seepage phenomena through the foundation of Megenin dam are investigated. Most of the recorded dam’s failure around the world are related to seepage problems. Therefore to avoid failure of earth dams due to seepage, settlement, and piping, continuous field observations are essential. The Megenin dam is a 38 m high rock fill dam. A concrete cut-off wall and grout curtain were constructed below the dam body to prevent reservoir seepage through the foundation.The dam was constructed in 1972, for two main purposes; first to control floods for the cultivated fields downstream and to protect Tripoli city, secondly to collect water for irrigation. On 15thMay 2003 during the 3rd filling, the water level in the reservoir reached 271.86 m, while seepage water was observed in the wadi bed downstream of the main dam. This phenomena were also observed in previous times. The Piezometric water level was much higher compared to that previously measured. To assess the seepage phenomena and the impact on dam safety, the folowing were applied: the technique of ground penetrating radar survey (GPR), piezometric analysis, and temperature field evaluation. Constructed a flow net model for the dam.The results of the study showed that: GPR profiles describe critical zones in the dam site. Identify the water seepage paths from dam reservoir to down stream of dam.Determine the amount of total water seepage capacity through the dam foundation (Q= 0.08 Ɩ / s ).The essential points to avoid any problem that may occur in the future in Megenin dam due to seepage problems.
ناجي محمد شكشم (2009)

Two-stage concrete (TSC) is a special type of concrete that themethod of its construction and implementation is different fromconventional one. In TSC, coarse aggregate particles are first placed in the formwork and voids between themare subsequently injected with a special cementations mixture. TSC has been successfully used in many applications, such as underwater construction, casting concrete sections congested with reinforcement and concrete repair. Coarse aggregate forms about 60% of the total volume of TSC, while coarse aggregate forms about 40% of the total volume of conventional concrete. In TSC stresses are transferred through contact areas between coarse aggregate particles. In this paper coarse aggregate size influence on strength parameters of TSC and comparing it with conventional concrete is done (by uniaxial compressive strength test and Brazilian tensile strength test). According to results of tests in this paper, the TSC with finest grain of coarse aggregate has higher compressive and tensile strength, higher modulus of elasticity and less Poisson’s ratio from conventional concrete. arabic 11 English 66
Hakim Salem Abdelgader Abdelgader (3-2019)