Construction Quality Control of Dynamic Compaction Method Treatment Collapsible Loess Foundation

2012 ◽  
Vol 594-597 ◽  
pp. 1149-1152
Author(s):  
Zheng Rong Zhao ◽  
Hong Xia Yang
Keyword(s):  
Large Scale ◽  
Dynamic Compaction ◽  
Dry Density ◽  
Evaluation Standards ◽  
Collapsible Loess ◽  
Quality Testing ◽  
Before And After ◽  
The City ◽  
Compaction Method ◽  
Construction Practice

Through the field test data comprehensive analysis, the construction parameters of dynamic compaction can be obtained.The comparison of the before and after dynamic compaction reinforcement effect shows that the collapsible loess foundation after the dynamic compaction treatment, the soil dry density increases by approximately 10%, void ratio reduces by about 15%,bearing capacity increases by 15% or more and collapsible disappears. According to the construction practice of large-scale dynamic compaction method in the south line of Jinan around the city expressway, discusses the key problems should be noted during the construction process and treatment methods of special sections, quality testing methods and evaluation standards.

Experimental Research on Application of Dynamic Compaction for the Treatment of Collapsible Loess Foundation

2014 ◽  
Vol 638-640 ◽  
pp. 441-444 ◽  
Author(s):  
Jun Hui Guo ◽  
Hai Jian Sun ◽  
Bao Ming Wang
Keyword(s):  
Power Plant ◽  
Laboratory Tests ◽  
Dynamic Compaction ◽  
Dry Density ◽  
Foundation Treatment ◽  
Collapsible Loess ◽  
Before And After ◽  
Effective Depth ◽  
Research On Application

The experiment on foundation improvement by dynamic compaction in Collapsible Loess foundation of the power plant was made. Before and after the experiment, kinds of in-situ and laboratory tests were performed .Through these tests, the influence of the dynamic compaction on the character of the soil, such as dry density, collapsibility, bearing capacity is analyzed. The effective depth of improvement of foundation is calculated and the conclusion of the efficiency of the foundation treatment by dynamic compaction is made. The choosing of techniques and parameter of the dynamic compaction also is elaborated in the paper, which make an example for other similar construction in the future.

Experimental Research on Deep Collapsible Loess Foundation Treatment by Dynamic Compaction under Super High Fill

2012 ◽  
Vol 256-259 ◽  
pp. 129-138 ◽  
Author(s):  
Yuan Mei ◽  
Chang Ming Hu ◽  
Xue Yan Wang
Keyword(s):  
Energy Levels ◽  
Deformation Modulus ◽  
Dynamic Compaction ◽  
Foundation Soil ◽  
Foundation Treatment ◽  
Collapsible Loess ◽  
Before And After ◽  
The Stability ◽  
Effective Reinforcement ◽  
Reliable Basis

Taking one foundation project as an example, a series of tests are carried out to study the dynamic compaction parameters and its effects on the deep collapsible loess foundation under super high fill in Lvliang region. Analyses are made on the average settlement of each test area before and after dynamic compaction and on the regularity of the main physical and mechanical indexes of soil. At the energy levels of 2000 kN•m, 3000kN•m and 6000kN•m, the main parameters are gained, such as the effective reinforcement depth, the centre distance of tamping points , the standard of stopping ramming, and the optimal ramming number; hence, the empirical formula of the effective reinforcement depth of dynamic compaction. The results of the tests show that the deep collapsible loess foundation in Lvliang region can be effectively reinforced by dynamic compaction, that the stability of foundation is good, and that the loess collapse in the reinforced range is eliminated basically. Moreover, after dynamic compaction above the energy levels of 2000 kN•m, the eigenvalue of the bearing capacity of collapsible loess foundation in Lvliang can reach over 300kPa; the deformation modulus of foundation soil is more than 25MPa. Therefore, the results of the tests can provide a reference for the design and construction of projects of the same kind; it can also provide a reliable basis for relevant norms and standards.

Practice Research on Wet-Collapsible Loess Foundation Treatment by High Energy Dynamic Compaction

2012 ◽  
Vol 204-208 ◽  
pp. 635-639 ◽  
Author(s):  
Qian Li ◽  
Chuan Tang ◽  
Le Fu ◽  
Xiao Ming Cao ◽  
Pei Zhen Chen ◽  
...  
Keyword(s):  
Large Scale ◽  
Standard Penetration Test ◽  
High Energy ◽  
Dynamic Compaction ◽  
Practice Research ◽  
Penetration Test ◽  
Foundation Soil ◽  
Foundation Treatment ◽  
Collapsible Loess ◽  
Design Construction

A systematic and comprehensive study on the design, construction and testing of large scale of Ⅲ～Ⅳ grade wet-collapsible loess foundation treatment by 8000 kN•m high energy dynamic compaction is done in this paper. Effect on the treatment for collapsible loess foundation by dynamic compaction is analyzed through Rayleigh wave velocity test, standard penetration test, lab soil test and static cone penetration test. By comparison with physical and mechanical properties index of the foundation soil without dynamic compaction treatment, the effective reinforcement depth, the elimination of collapsibility and the bearing capacity of foundation are found to meet the design requirements. The results of this paper could supply some reference for the design, construction and testing of other collapsible loess foundations by dynamic compaction treatment.

Public Information Activities To Mitigate the Impacts of Closing San Francisco’s Central Freeway

1998 ◽  
Vol 1632 (1) ◽  
pp. 68-77 ◽  
Author(s):  
John W. Billheimer ◽  
Juliet McNally ◽  
Doug Sibley ◽  
Gerald Robbins
Keyword(s):  
San Francisco ◽  
Large Scale ◽  
Public Information ◽  
California Department ◽  
Seismic Safety ◽  
The Public ◽  
Information Program ◽  
Before And After ◽  
The Media ◽  
The City

San Francisco’s Central Freeway, which carried 93,000 commuters a day over Market Street into the Hayes Valley/Western Addition neighborhood, was shut down on August 25, 1996, so the freeway’s upper deck could be demolished as a first step in improving the seismic safety of the structure. Anticipating disastrous traffic tie-ups, local newspapers characterized the construction period in advance as “six months of traffic hell.” In an effort to mitigate the effects of the closure, the California Department of Transportation and the city of San Francisco developed a mitigation plan and implemented a wideranging public information program that included direct mailings of brochures detailing alternative travel patterns to commuters observed using the freeway. On the first day after the closure, the media braced for disaster and sent reporters to cover the expected traffic jams. When none occurred, the absence of backups became news, and politicians questioned whether the freeway was really needed. Commuters had heeded the advice of the public information campaign and spread themselves over enough routes and modes to avert large-scale delays. However, the diverted traffic brought additional congestion, delays, and potentially more accidents to the city streets in the vicinity of the freeway. The traffic patterns before and after closure are documented here, and the effectiveness of the public information program in influencing these patterns is assessed.

The Effect of Active Site-inhibited Factor VIIa on Tissue Factor-initiated Coagulation Using Platelets before and after Aspirin Administration

1997 ◽  
Vol 78 (04) ◽  
pp. 1202-1208 ◽  
Author(s):  
Marianne Kjalke ◽  
Julie A Oliver ◽  
Dougald M Monroe ◽  
Maureane Hoffman ◽  
Mirella Ezban ◽  
...  
Keyword(s):  
Tissue Factor ◽  
Active Site ◽  
Large Scale ◽  
Thrombin Generation ◽  
Factor Viia ◽  
Dependent Manner ◽  
Antithrombotic Agent ◽  
Before And After ◽  
Ic50 Values

SummaryActive site-inactivated factor VIIa has potential as an antithrombotic agent. The effects of D-Phe-L-Phe-L-Arg-chloromethyl ketone-treated factor VIla (FFR-FVIIa) were evaluated in a cell-based system mimicking in vivo initiation of coagulation. FFR-FVIIa inhibited platelet activation (as measured by expression of P-selectin) and subsequent large-scale thrombin generation in a dose-dependent manner with IC50 values of 1.4 ± 0.8 nM (n = 8) and 0.9 ± 0.7 nM (n = 7), respectively. Kd for factor VIIa binding to monocytes ki for FFR-FVIIa competing with factor VIIa were similar (11.4 ± 0.8 pM and 10.6 ± 1.1 pM, respectively), showing that FFR-FVIIa binds to tissue factor in the tenase complex with the same affinity as factor VIIa. Using platelets from volunteers before and after ingestion of aspirin (1.3 g), there were no significant differences in the IC50 values of FFR-FVIIa [after aspirin ingestion, the IC50 values were 1.7 ± 0.9 nM (n = 8) for P-selectin expression, p = 0.37, and 1.4 ± 1.3 nM (n = 7) for thrombin generation, p = 0.38]. This shows that aspirin treatment of platelets does not influence the inhibition of tissue factor-initiated coagulation by FFR-FVIIa, probably because thrombin activation of platelets is not entirely dependent upon expression of thromboxane A2.

EVALUATION OF THE EFFECTIVENESS OF NECK SHOULDER PAIN TREAMENT BY ACUPUNCTURE, MASSAGE AND TRADITIONAL MEDICINE REMEDY

2013 ◽  
pp. 110-117
Author(s):  
Thi Tan Nguyen
Keyword(s):  
Traditional Medicine ◽  
Shoulder Pain ◽  
Research Methodology ◽  
Pain Treatment ◽  
Central Hospital ◽  
Treatment Results ◽  
Good Account ◽  
Before And After ◽  
The City ◽  
Pain Patients

Objectives: To assess the effectiveness neck shoulder pain treatment by acupuncture, massage and traditional medicine remedy. Materials and Methods: 42 patients included in the inpatient and outpatient at the Department of Traditional Medicine, Hue Central Hospital and Traditional Medicine Hospital of Thua Thien Hue, was diagnosed as neck shoulder pain. Patients were treated with acupuncture, massage and medicine, according to the research methodology, assessing the results before and after treatment. Results: The age accounted for the highest proportion of 31-45 (42.49%), the second is between the ages of 46-60 (26.18%) and> 60 (26.18%). Incidence in the city (66.67%) than rural (33.33%) (p <0:05). Patients presented with neck shoulder pain (100%), together with the head pain, pain in the shoulder, arm numbness, movement restrictions tilted head bowed. Conclusion: good variety and accounted for 71.42% of which are quite good account of 14.28%, only 2.38% is poor. Results of good, high aged 31-45 (35.72%) and in patients with a course of treatment (66.66%). Key words: neck shoulder pain, acupuncture, massage, traditional medicine remedy.

CONCEPT OF THE IMPROVEMENT OF A KEY PUBLIC SPACE (USING THE EXAMPLE OF «ALLEY OF ARCHITECTS», VORONEZH)

2020 ◽  
pp. 97-109
Author(s):  
С. Л. Подвальный ◽  
О. А. Сотникова ◽  
Я. А. Золотухина
Keyword(s):  
Urban Environment ◽  
Public Space ◽  
Large Scale ◽  
Economic Value ◽  
Ecological Condition ◽  
Territory Design ◽  
Definition Of ◽  
The City ◽  
Modern Technologies ◽  
Intensive Growth

Постановка задачи. В настоящее время формирование современной комфортной городской среды приобретает особое социально-экономическое значение и выдвигается в число приоритетных государственных масштабных программ. В связи с этим необходимо разработать концепцию благоустройства ключевого общественного пространства, а именно: определить основные и сопутствующие функции данной территории, создать эскизное предложение проекта благоустройства с учетом всех необходимых норм и стандартов, внедрить современные технологии. Результаты. Выполнен эскизный дизайн-проект «Аллеи архитекторов» по ул. Орджоникидзе г. Воронеж, включающий в себя основные элементы по зонированию территории, проектированию акцентных объектов и внедрению инновационных технологий «умного города», позволяющих повысить уровень комфорта горожан. Выводы. Благоустройство населенных мест приобретает особое значение в условиях дискомфорта среды. С выполнением комплекса мероприятий, направленных на благоустройство, и с внедрением современных технологий значительно улучшается экологическое состояние, внешний облик города. Оздоровление и модернизация среды, которая окружает человека в городе, благотворно влияет на психофизическое состояние, что особенно важно в период интенсивного роста городов. Statement of the problem. Currently the formation of the modern comfortable urban environment is gaining a special social and economic value and moving forward in the priorities of state large-scale programs. The purpose of development of the concept of improvement of public space is definition of the main and accompanying functions of this territory, design of the outline offer of the project of improvement considering all necessary norms and standards and implementation of modern technologies. Results. The conceptual project of “Alley of Architects” includes the basic elements of territory zoning, design of accent objects and implementation of technologies of a “smart-city”. These elements allow one to increase the level of comfort of inhabitants. Conclusions. Improvement of the inhabited places is of particular importance in the conditions of discomfort of the environment. Carrying out a complex of the actions directed to gardening and improvement, introducing modern technologies, the ecological condition, the physical appearance of the city considerably improves. Improvement and modernization of the environment which surrounds the person in the city influences a psychophysical state well that especially important during intensive growth of the cities.

scholarly journals Urban Policies and Large Projects in Central City Areas: The Example of Madrid (Spain)

Urban Science ◽  
2021 ◽  
Vol 5 (2) ◽  
pp. 42
Author(s):  
Dolores Brandis García
Keyword(s):  
Urban Planning ◽  
20Th Century ◽  
Large Scale ◽  
Central City ◽  
Global Market ◽  
Late 20Th Century ◽  
Public And Private ◽  
Urban Policies ◽  
Starting Point ◽  
The City

Since the late 20th century major, European cities have exhibited large projects driven by neoliberal urban planning policies whose aim is to enhance their position on the global market. By locating these projects in central city areas, they also heighten and reinforce their privileged situation within the city as a whole, thus contributing to deepening the centre–periphery rift. The starting point for this study is the significance and scope of large projects in metropolitan cities’ urban planning agendas since the final decade of the 20th century. The aim of this article is to demonstrate the correlation between the various opposing conservative and progressive urban policies, and the projects put forward, for the city of Madrid. A study of documentary sources and the strategies deployed by public and private agents are interpreted in the light of a process during which the city has had a succession of alternating governments defending opposing urban development models. This analysis allows us to conclude that the predominant large-scale projects proposed under conservative policies have contributed to deepening the centre–periphery rift appreciated in the city.

scholarly journals THU0642-HPR EVOLUTION OF THE PERCEPTIONS OF RA PATIENTS AFTER EDUCATION PATIENT SESSION TEACHING METHOTREXATE SELF-INJECTION A PROSPECTIVE PILOT STUDY

2020 ◽  
Vol 79 (Suppl 1) ◽  
pp. 566.1-566
Author(s):  
S. Afilal ◽  
H. Rkain ◽  
B. Berchane ◽  
J. Moulay Berkchi ◽  
S. Fellous ◽  
...  
Keyword(s):  
Pilot Study ◽  
Patient Education ◽  
Median Duration ◽  
Large Scale ◽  
Education Session ◽  
Prospective Pilot Study ◽  
Mean Delay ◽  
Lack Of Information ◽  
Level Of Satisfaction ◽  
Before And After

Background:Methotrexate is a gold standard for treatment of RA. In our context, RA patients prefer to be injected by paramedics rather than self-injecting. This can be explained by patients’ bad perceptions of self-injection or lack of information. Appropriate self-injection education can therefore be an important element in overcoming these obstacles and improving disease self-management.Objectives:Compare the RA patients’ perceptions on methotrexate self-injection before and after a patient education session.Methods:Prospective pilot study that included 27 consecutive patients (81.5% female, mean age 44.4 years, illiteracy rate 40.7%) with RA (median duration of progression of 4 years, mean delay in referral for specialist of 6 months, median duration of methotrexate use of 1 year). The patients benefited from an individual patient education session to learn how to self-inject with methotrexate subcutaneously. The patient education session was supervised by a nurse and a rheumatologist with a control a week later. Perceptions of the reluctance to self-inject and the difficulties encountered by patients were assessed before the patient education session, after the 1st and 2nd self-injection of methotrexate using a 10 mm visual analog scale. Patients also reported their level of satisfaction (10 mm VAS) after the 1st and 2nd self-injection.Results:The mean duration of patient education session is 13 min.Table I compares the evolution of the degrees of reluctance to self-injection, the difficulties encountered, and the satisfaction experienced by the patients.Table 1.Evolution of RA patients’ perceptions on the methotrexate self-injection. (N = 27)BeforeAfter the 1stself-injectionAfter the 2end self-injectionpVAS reluctance (0-10mm)6,5 ± 3,62,2 ± 2,91,0 ± 2,3<0,0001VAS difficulty (0-10mm)7,5 ± 2,62,5 ± 2,71,0 ± 1,9<0,0001VAS satisfaction (0-10mm)-8,9 ± 1,89,5 ± 1,50,002Conclusion:This study suggests the effectiveness of a methotrexate self-injection patient education session in RA patients. It also highlights the value of patient education in rheumatologic care. A large-scale study is necessary to better interpret and complete these preliminary results from this pilot study.Disclosure of Interests:None declared

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