Analysis of Soil Disturbance Caused by Pipe Jacking Construction

2012 ◽  
Vol 166-169 ◽  
pp. 1480-1483
Author(s):  
Yang Sun ◽  
Zheng Liang Xu
Keyword(s):  
Environmental Impacts ◽  
Lateral Displacement ◽  
Earth Pressure ◽  
Soil Disturbance ◽  
Field Monitoring ◽  
Jiangsu Province ◽  
The Common ◽  
Pipe Jacking ◽  
And Control ◽  
Maximum Lateral Displacement

Open caisson is one of the common used structures, as a working shaft in pipe jacking project. Disturbance of the soil behind the reaction wall of open caisson (SBRWOC) will reduce the efficiency of jacking, and affect safety of site operation and control. However, there are few studies on disturbance of SBRWOC. In this paper, combining the project of parallel pipe jacking passing under the Guan River in Jiangsu Province, China, field monitoring of SBRWOC is carried out during pipe jacking construction, including earth pressure and lateral displacement of SBRWOC. The maximum lateral displacement of SBRWOC is about 27 mm and the maximum earth pressure is 98.5 kPa. These results are useful for engineers to study disturbance characteristics of SBRWOC and reduce environmental impacts during pipe jacking construction.

scholarly journals Disturbance Effect of Pipe Jacking Group Adjacent Excavation on Surrounding Soil

2021 ◽  
Vol 2021 ◽  
pp. 1-21
Author(s):  
Changbai Wang ◽  
Jimin Liu ◽  
Hua Cheng ◽  
Haibing Cai
Keyword(s):  
Mutual Influence ◽  
Water Pressure ◽  
Interaction Mechanism ◽  
Earth Pressure ◽  
Soil Disturbance ◽  
Disturbance Intensity ◽  
General Law ◽  
History Of ◽  
Pipe Jacking ◽  
Lateral Disturbance

Under the modern and complicated urban environment, clarifying the interaction mechanism and mutual influence mechanism between the urban tunnel and the surrounding environment is of considerable significance to the construction and operation of the tunnel. To understand and grasp the excavation-induced disturbance range and mechanism of adjacent pipeline jacking group on surrounding soils, this paper carries out relevant researches. Based on a case history of a three-hole parallel adjacent jacking pipeline in shallow overburden, a field test and assessment are performed. By setting monitoring points around the monitoring section, the earth pressure and water pressure under different buried depths and different spacing are monitored. For further discussion, the general law of soil disturbance around single-hole, double-hole, and three-hole jacking is investigated, the calculation method of lateral disturbance range and overlapping area range of pipe jacking group is deduced, and the degree of soil disturbance is evaluated as well. The results show that there will be different degrees of disturbance superposition in parallel multihole jacking due to the influence of the spacing, and the disturbance intensity is greatly affected by the parallel distance and buried depth.

scholarly journals A Case Study on Field Monitoring Analysis of Deep Foundation Pit in Soft Soils

2019 ◽  
Vol 2019 ◽  
pp. 1-10 ◽  
Author(s):  
Xiaoshuang Zhang ◽  
Xiuchuan Zhang ◽  
Yunshan Han
Keyword(s):  
Lateral Displacement ◽  
Ground Surface ◽  
Field Monitoring ◽  
Diaphragm Wall ◽  
Deep Foundation ◽  
Foundation Pit ◽  
Deep Foundation Pit ◽  
Ground Surface Settlement ◽  
Maximum Lateral Displacement

Field monitoring in the process of excavation of foundation pit is an important measure to reduce the risk. This paper describes a case study of the filed monitoring data during the process of deep foundation pit excavation in soft soil areas. The displacements of the diaphragm wall top were analysed and found that the horizontal displacement showed the convex shape, while the vertical displacement showed the concave shape. Based on the field monitoring data, the deformation mode of lateral displacement of the diaphragm wall belonged to the composite mode. The relationship between maximum lateral displacement and excavation depth showed a strong linear correlation. The horizontal displacements of bracing pillar decreased with the increasing of bracing stiffness, while the effect of bracing stiffness on vertical displacements of bracing pillar could be ignored. The settlement profile computed using the method of Hsieh and Ou was in good agreement with the field observations and better described the development trend of the ground surface settlement. The ratio of the maximum ground surface settlement (δvm) to the maximum lateral displacement of the diaphragm wall (δhm) was in the range of 0.74∼0.88, belonging to the range of 0.5∼1.0 proposed by Hsieh and Ou. This paper provides a reference basis and related guidance for similar projects.

FINANCIAL CONTROLLING IN THE SYSTEM OF FINANCIAL MANAGEMENT

2018 ◽  
Vol 28 (1) ◽  
pp. 137-141
Author(s):  
Petya Yordanova – Dinova
Keyword(s):  
Comparative Analysis ◽  
Financial Management ◽  
Financial Stability ◽  
Business Environment ◽  
Innovative Approach ◽  
Financial Sustainability ◽  
The Common ◽  
The Difference ◽  
Effective Use ◽  
And Control

This paper explores the comparative analysis of the financial controlling, who is a result from the common controlling concept and the financial management. In the specialized literature, financial controlling is seen as an innovative approach to financial management. It is often presented as the most promising instrument of financial diagnostics. Generally speaking, financial controlling is seen as a process of managing the company`s assets which are valued in monetary measures. The difference between the financial management and the financial controlling is that the second covers all functions of management, analysis and control of finances, aiming at maximizing their effective use and increasing the value of the enterprise. Financial controlling is often seen as a function of the common practice of financial management. Its objective is to preserve the financial stability and financial sustainability of enterprises operating in a highly aggressive business environment.

scholarly journals Subtyping Salmonella isolated from pet dogs with multilocus sequence typing (MLST) and clustered regularly interspaced short palindromic repeats (CRISPRs)

AMB Express ◽  
2021 ◽  
Vol 11 (1) ◽  
Author(s):  
Cheng Yang ◽  
Wangfeng Shao ◽  
Lingling Wei ◽  
Lingxiao Chen ◽  
Aihua Zhu ◽  
...  
Keyword(s):  
Multilocus Sequence Typing ◽  
Sequence Type ◽  
Jiangsu Province ◽  
Zoonotic Pathogen ◽  
Recognition Ability ◽  
Prevention And Treatment ◽  
Common Serotypes ◽  
The Common ◽  
Different Sources ◽  
Positive Effect

AbstractSalmonella, as a zoonotic pathogen, has attracted widespread attention worldwide, especially in the transmission between household pets and humans. Therefore, we investigated the epidemic distribution of dog Salmonella from pet hospitals and breeding base in Xuzhou, Jiangsu Province, China, and used multilocus sequence typing (MLST) and clustered regularly interspaced short palindromic repeats (CRISPRs) to subtype Salmonella isolates. From April 2018 to November 2019, a total of 469 samples were collected from pet hospitals and breeding base, including 339 dog samples and 60 cat samples. S. Kentucky (40.74%) was the most prevalent serotype, but other, such as S. Typhimurium (18.52%) and S. Indiana (18.52%), were also widespread. Eight different sequence type (ST) patterns were identified by MLST and ST198 was the highest proportion of these isolates. CRISPRs analysis showed that 9 different Kentucky CRISPR types (KCTs) was identified from ST198. 48 spacers including 29 (6 News) for CRISPR1 and 19 (4 News) for CRISPR2 that proved the polymorphic of Salmonella genes in samples from different sources. The analysis demonstrated that the common serotypes were widely present in pet hosts in the same area. This analysis shows that CRISPR genes have better recognition ability in the same serotype, which has a positive effect on the traceability of Salmonella and the prevention and treatment of salmonellosis.

Inhibition of IL-13: A New Pathway for Atopic Dermatitis

2020 ◽  
pp. 120347542098255
Author(s):  
Kayadri Ratnarajah ◽  
Michelle Le ◽  
Anastasiya Muntyanu ◽  
Steve Mathieu ◽  
Simon Nigen ◽  
...  
Keyword(s):  
Monoclonal Antibody ◽  
Atopic Dermatitis ◽  
Severity Index ◽  
Severe Atopic Dermatitis ◽  
Treatment Alternative ◽  
Control Groups ◽  
Rapid Improvement ◽  
Common Receptor ◽  
The Common ◽  
And Control

Dupilumab, a monoclonal antibody against the common receptor of interleukin (IL)-4 and IL-13, was the first biologic therapy approved in Canada for treatment of moderate-to-severe atopic dermatitis (AD). While it is considered safe and effective, dupilumab is not universally effective and 8%-38% of patients develop conjunctivitis, while some patients develop head and neck dermatitis. Thus, new therapeutic options are warranted. While both IL-4 and IL-13 play important roles in the pathogenesis of AD, it has been recently demonstrated that IL-13 is the primary upregulated cytokine in AD skin biopsy samples. A placebo-controlled phase 2b clinical trial evaluating the efficacy and safety of lebrikizumab, an IL-13 inhibitor, in AD demonstrated that, at 16 weeks, Eczema Area and Severity Index (EASI) 75 and Investigator’s Global Assessment (IGA) 0/1 were achieved by 60.6% and 44.6% of patients taking lebrikizumab at its highest dose (vs 24.3% and 15.3% of patients taking placebo, respectively). Moreover, treatment with lebrikizumab was associated with rapid improvement of pruritus and low rates of conjunctivitis (1.4%-3.8%). Another IL-13 monoclonal antibody, tralokinumab, was evaluated for safety and efficacy in moderate-to-severe AD. By week 12, among adults receiving 300 mg tralokinumab, 42.5% achieved EASI-75 and 26.7% achieved IGA 0/1 score (vs 15.5% and 11.8% in the placebo group, respectively). Both lebrikizumab and tralokinumab demonstrated acceptable safety profiles in AD (and non-AD) trials with adverse events often being comparable between treatment and control groups. Thus, IL-13 inhibitors may provide a safe and effective treatment alternative for patients with moderate-to-severe AD.

Keeping the Focus on Public Health: The Struggles of a Tobacco Prevention Task Force

2003 ◽  
Vol 30 (6) ◽  
pp. 771-788 ◽  
Author(s):  
Jacquie A. Shillis ◽  
Beverly A. Hall ◽  
Gail G. Sneden ◽  
Nell H. Gottlieb
Keyword(s):  
Public Health ◽  
Task Force ◽  
Tobacco Prevention ◽  
Policy Success ◽  
Public Health Officials ◽  
The Common ◽  
And Control ◽  
Future Program ◽  
Product Sets

This case study examines a nonlegislative task force as it struggled to reach internal consensus despite external-political constraints. The study highlights the convergence of politics and science, revealing complex issues likely to be confronted by advocates and public health officials. Three themes capture participants’experiences: context, sizing up the opportunities and constraints; task force process, tacit strategy to operate outside the political context and play the science card; and aftermath, a glass half full. The task force took advantage of ambiguous parameters, crafting a comprehensive statewide plan to reduce tobacco use and breaking out of the common public health paradigm of allowing budget considerations to drive program design. These internal victories could not sustain a policy success in the legislature. However, the group’s product sets science-based standards for future program development, and the task force’s process provides valuable insights into other states developing tobacco prevention and control policies.

Medical Students’ Professionalism Narratives Reveal That Experiences With Death, Dying, or Palliative Care Are More Positive Than Other Experiences During Their Internal Medicine Clerkship

2016 ◽  
Vol 34 (1) ◽  
pp. 79-84 ◽  
Author(s):  
Larry D. Cripe ◽  
David G. Hedrick ◽  
Kevin L. Rand ◽  
Debra Burns ◽  
Daniella Banno ◽  
...  
Keyword(s):  
Internal Medicine ◽  
Palliative Care ◽  
Medical Students ◽  
Educational Strategies ◽  
Barriers To Learning ◽  
Medicine Clerkship ◽  
Student Preparedness ◽  
Internal Medicine Clerkship ◽  
The Common ◽  
And Control

Purpose: More physicians need to acquire the skills of primary palliative care. Medical students’ clerkship experiences with death, dying, and palliative care (DDPC), however, may create barriers to learning such skills during residency. Whether professional development is differentially affected by DDPC is unknown. This knowledge gap potentially hinders the development of educational strategies to optimize students’ preparedness for primary palliative care. Method: Third-year students submitted professionalism narratives (N = 4062) during their internal medicine clerkship between 2004 and 2011. We identified DDPC-related narratives and then randomly selected control narratives. Narratives were compared by valence (positive or negative) and professionalism-related themes. Results and Conclusion: Less than 10% of the narratives were related to DDPC, but the majority was positive. There was a significant overlap in professionalism themes between DDPC and control narratives. The results suggest student preparedness for primary palliative care may be improved by addressing the common professionalism challenges of clinical clerkships.

scholarly journals Using a smartphone video camera to reduce anxiety in speaking activity

2021 ◽  
Vol 12 (1) ◽  
pp. 38-55
Author(s):  
Nur Asma
Keyword(s):  
Smartphone Application ◽  
Video Camera ◽  
New Methods ◽  
Self Confidence ◽  
Significant Difference ◽  
English Speaking ◽  
The Common ◽  
Common Problems ◽  
And Control ◽  
Relevant Factors

The common problems faced by students in English speaking are anxiety and the lack of confidence and ideas. This research was conducted to determine the relevant factors and to provide a solution by using the smartphone video camera. To obtain the data in this research, experimental research was performed inside and outside the classroom with a series of treatments and a questionnaire sheet as the instrument. The data were analyzed using a model proposed by Smeda, Dakich, and Sharda (2014) and a Likert scale questionnaire, which was adapted from Spratt, Humphreys, and Chan (2002). The result from the test showed a significant difference between the experimental and control classes as the carried t-test presented the score of -8.36, which was out of the limit (between -1.96 and 1.96). Another result was the students developed positively which was shown by: the anxiety tends to decrease as they were given time before performing thus prepared better, their self-confidence was increased and challenged by using the smartphone video camera method due to the application of innovation in the speaking class. The conclusion of this research is lecturer needs to apply new methods, one of which is using a smartphone application.

Seismic Reduction and Control Analysis of Hybrid Structure with Viscous Dampers under Strong Earthquake

2014 ◽  
Vol 580-583 ◽  
pp. 1633-1636 ◽  
Author(s):  
Sen Qiu ◽  
Shu Cheng Deng ◽  
Zhao Quan Zhu
Keyword(s):  
Strong Earthquake ◽  
Lateral Displacement ◽  
Hybrid Structure ◽  
Earthquake Ground Motion ◽  
Control Analysis ◽  
Viscous Damper ◽  
Viscous Dampers ◽  
Maximum Value ◽  
Story Drift ◽  
And Control

This article focuses on the effect of viscous damper on seismic performance of steel-concrete hybrid structure under strong earthquake. The result shows that viscous damper has effect on seismic reduction and control. The story lateral displacement, story drift rotation and energy dissipation-seismic can be reduced effectively by viscous dampers. The maximum value of vibration-reduction ratio is 36.0%, 67.9%, 36.9%. It is different effect on seismic reduction by different earthquake ground motion. Response of earthquake amplifies under Pasadena earthquake wave than the others.

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