Detection of anomalies in diaphragm walls with crosshole sonic logging

2014 ◽  
Vol 51 (4) ◽  
pp. 369-380 ◽  
Author(s):  
Rodriaan Spruit ◽  
Frits van Tol ◽  
Wout Broere ◽  
Evert Slob ◽  
Ernst Niederleithinger
Keyword(s):  
Quality Control ◽  
Predictive Value ◽  
Construction Projects ◽  
Field Data ◽  
Reference Information ◽  
Diaphragm Walls ◽  
Reference Measurements ◽  
Sonic Logging ◽  
Laboratory Models

Crosshole sonic logging (CSL) can be used to determine the quality of joints in a diaphragm wall. Tests conducted on laboratory models have provided reference information for interpretation of field data. During two large construction projects, CSL has been implemented for quality control of diaphragm walls. The field experiences have shown the benefits of the tests and the predictive value of the reference measurements.

scholarly journals Distributed temperature sensing applied during diaphragm wall construction

2017 ◽  
Vol 54 (2) ◽  
pp. 219-233 ◽  
Author(s):  
Rodriaan Spruit ◽  
Frits van Tol ◽  
Wout Broere ◽  
Pieter Doornenbal ◽  
Victor Hopman
Keyword(s):  
Casting Process ◽  
Temperature Sensing ◽  
Distributed Temperature Sensing ◽  
Reference Information ◽  
Bentonite Slurry ◽  
Good Grade ◽  
Reference Measurements ◽  
Concrete Casting ◽  
Sonic Logging ◽  
Laboratory Models

Distributed temperature sensing (DTS) can be used to monitor the production process of diaphragm walls. DTS is able to differentiate between already present or fresh bentonite suspensions during refreshing of the bentonite slurry in the trench. During concrete casting, DTS is able to differentiate between the bentonite suspension and concrete. As a result, the continuity of the casting process and the arrival of good grade concrete at crucial locations in the trench can be monitored. Tests conducted on laboratory models provided reference information for interpretation of field data. Field experiences have shown the benefits of DTS tests and the predictive value of the reference measurements. Results are compared with crosshole sonic logging measurements at the same location.

A Study of PCI Model in Construction Quality Control

2013 ◽  
Vol 860-863 ◽  
pp. 3041-3044
Author(s):  
Cheng Jun Wang ◽  
Yi Fei Wang ◽  
Yang Song
Keyword(s):  
Quality Control ◽  
Failure Rate ◽  
Construction Projects ◽  
Decisive Role ◽  
Construction Quality ◽  
Construction Stage ◽  
Construction Technique ◽  
Building Projects ◽  
Construction Enterprises

The quality control during construction phase of building projects plays a decisive role in project quality. This paper, via analyzing the relation between PCI and failure rate and combining the special characteristics of construction projects, comes up with PCI model feasible to evaluate the inspection of construction projects. The model in this paper can quantitatively measure the grade of work procedure quality of the ongoing construction projects in a way to find and correct the quality problems during construction stage for construction enterprises with the aim to enhance construction technique and management as well as capabilities in other areas and finally it can increase the overall construction quality and enhance enterprise competitiveness.

scholarly journals The Design and Implementation of High-rise Building Construction Based on GPS Positioning Technology

2018 ◽  
Vol 2 (1) ◽  
Author(s):  
Deng Hui
Keyword(s):  
Quality Control ◽  
Completion Time ◽  
Construction Projects ◽  
Building Construction ◽  
Height Measurement ◽  
Gps Positioning ◽  
High Rise ◽  
Design And Implementation ◽  
High Rise Building

Baseline observation as well as height measurement is the important content of the quality control of high-rise building construction. In order to strengthen the quality of construction projects, meet the requirement of completion time, improve the accuracy and efficiency  of  locating observation  and  explore  a scientific way of observation suitable for high-rise building construction, this paper studies the design and implementation of high-rise building construction based  on  GPS  positioning technology.

scholarly journals PENGENDALIAN MUTU STRUKTUR PADA PROYEK RUMAH SUSUN STASIUN PONDOK CINA

2020 ◽  
Vol 2 (3) ◽  
pp. 195-200
Author(s):  
Betty Rosyana Manurung ◽  
Sidiq Wacono
Keyword(s):  
Quality Control ◽  
Control System ◽  
Reinforced Concrete ◽  
Construction Projects ◽  
Control Process ◽  
Secondary Data ◽  
Quality Control System ◽  
Quality Control Process ◽  
Time Work

ABSTRACTEach project can run well and achieve results as planned is expected undoubtedly. Therefore, it requires project quality control. The quality control system in construction projects is essential must be carried out to produce one-time work of a quality that meetsthe specified standards. This study aimsto determine the quality control system for superstructure work and to determine whether the quality of reinforced concrete is according to the requirements. The data used is secondary data, namely, data directly obtained from the project. The data used are tthe concrete compressed test result and reinforcing steel tests held in the laboratory and reinforced concrete data. The analysis results showed that the compress strength of concrete for FC 30 and FC 40 with a test age of 28 days was by the specified requirements, the reinforcement tests S10, S13, S16, S19, S22, S25 meet requirements. For the final result, reinforced concrete found a few defects, but the contractor immediately took corrective action. The analysis shows the implementation of an appropriate quality control process in this project.Keywords : Quality; control; concrete; reinforcement; constructionABSTRAKSetiap proyek tentu diharapkan bisa berjalan dengan baik dan mencapai hasilsesuai perencanaan. Maka dari itu, dibutuhkan pengendalian mutu proyek. Sistem pengendalian mutu pada proyek konstruksi penting dilakukan untuk menghasilkan pekerjaan yang sekali jadi dengan mutu yang memenuhi standar yang ditentukan. Penelitian ini bertujuan untuk mengetahui sistem pengendalian mutu pekerjaan struktur atas dan mengetahui apakah hasil mutu beton bertulang sesuai dengan yang disyaratkan. Data yang dipergunakan adalah data sekunder yaitu data yang langsung didapat dari proyek. Adapun data yang digunakan adalah hasil uji tes tekan beton dan tes baja tulangan yang diadakan di laboratorium serta data hasil akhir beton bertulang. Hasil dari penelitian didapatkan hasil kuat tekan beton untuk FC 30 dan FC 40 dengan umur tes 28 hari sudah sesuai dengan persyaratan yang ditetapkan, hasil tes uji tulangan S10, S13, S16, S19, S22, S25 sudah sesuai dengan persyaratan. Untuk hasil akhir beton bertulang ditemukan sedikit cacat namun pihak kontraktor segera melakukan tindakan perbaikan. Dari hasil analisis menunjukan bahwa proses pengendalian mutu pada proyek ini sudah dilaksanakan dengan baik.Kata kunci : Mutu; pengendalian; beton; tulangan; konstruksi

CHALLENGES IN THE IMPLEMENTATION OF QUALITY CONTROL TECHNIQUES DURING SITE INSPECTION

2016 ◽  
Vol 3 (2) ◽  
Author(s):  
Nur Nabihah Abd Razak ◽  
Intan Rohani Endut ◽  
Siti Akmar Abu Samah ◽  
Ahmad Ruslan Mohd Ridzuan ◽  
Sabihah Saaidin
Keyword(s):  
Quality Control ◽  
Construction Projects ◽  
Poor Quality ◽  
Construction Process ◽  
Test Plan ◽  
Negative Effects ◽  
Control Techniques ◽  
Project Outcomes ◽  
Quality Control Techniques

Quality has been the main issue in construction projects. In handling it, the quality control techniques during construction process are required to thoroughly carry out in order to avoid any mistakes which lead to bigger problem such as poor quality of project outcomes. The implementation of quality control techniques during site inspection is able to discard all possible negative effects towards construction projects. There are three quality control techniques that have been used during site inspection known as Project Quality Plan (PQP), Inspection Test Plan (ITP) and Checklist. In order to implement these techniques, there are some matters that need to be identified and overcome. Therefore, this study has been carried out to identify the challenges in implementation of quality control techniques during site inspection. To achieve the objective, the survey questionnaire was distributed among G5, G6 and G7 contractors’ in Malaysia. A total of 82 useable questionnaires were received and analysed using factor analysis. The challenges were clumped and categorized into respective groups. The seven groups were renamed, namely: (1) attitude, (2) documents, (3) operations, (4) management, (5) workers, (6) information and (7) methods. This study helps to improve the quality control techniques especially during site inspection among Malaysian contractors.

Development and Application of Quality Control System for Highway Subgrade Construction

2019 ◽  
Vol 2 (5) ◽  
Author(s):  
Tong Wang
Keyword(s):  
Quality Control ◽  
Real Time ◽  
Detection Method ◽  
System Development ◽  
Effective Control ◽  
Construction Process ◽  
Development Mode ◽  
The Road ◽  
Whole Process

The compaction quality of the subgrade is directly related to the service life of the road. Effective control of the subgrade construction process is the key to ensuring the compaction quality of the subgrade. Therefore, real-time, comprehensive, rapid and accurate prediction of construction compaction quality through informatization detection method is an important guarantee for speeding up construction progress and ensuring subgrade compaction quality. Based on the function of the system, this paper puts forward the principle of system development and the development mode used in system development, and displays the development system in real-time to achieve the whole process control of subgrade construction quality.

Construction Control As A Strategy For Improving The Quality Of Buildings And Structures

2020 ◽  
Keyword(s):  
Quality Control ◽  
Life Cycle ◽  
Construction Control ◽  
Construction Sites ◽  
Actual Problem ◽  
Construction Market ◽  
Construction Products ◽  
Underlying Causes ◽  
Required Quality

In construction production, the safety of constructing buildings and structures is achieved by ensuring the required quality as a result of systematic construction control based on the implementation of a complex of technical, economic and organizational measures at all stages of the object's life cycle. The article deals with the actual problem of improving the quality of construction products-buildings and structures in conjunction with the activities of construction control bodies. The article presents the advanced foreign and domestic experience of ensuring the quality control at the construction sites, providing for the prevention of the underlying causes of defects and increasing the interest of the contractors directly. On the basis of the analysis of the current situation with quality control at the construction market, ways to improve its efficiency by developing a unified system of technological implementation of relevant requirements for the quality of construction products, determining the rational number and business load of construction control engineers, as well as the active activities of self-regulatory organizations in this area are offered.

68. The resident experience in a large urban teaching setting: Results of the 2005-2006 resident exit survey, University of Torontos

2007 ◽  
Vol 30 (4) ◽  
pp. 66
Author(s):  
N. Tenn-Lyn ◽  
S. Verma ◽  
R. Zulla
Keyword(s):  
Quality Control ◽  
Residency Training ◽  
Royal College ◽  
Online Survey ◽  
Career Guidance ◽  
Training Programs ◽  
Program Planning ◽  
Educational Experience ◽  
Care Experience

We developed and implemented an annual online survey to administer to residents exiting residency training in order to (1) assess the quality of the residency experience and (2) identify areas of strength and areas requiring improvement. Long-term goals include program planning, policy-making and maintenance of quality control. Survey content was developed from an environmental scan, pre-existing survey instruments, examination of training criteria established by the CFPC and the CanMEDS criteria established by the RCPSC. The survey included evaluation benchmarks and satisfaction ratings of program director and faculty, preparation for certification and practice, quality of life, quality of education, and work environment. The response rate was 28%. Seventy-five percent of respondents were exiting from Royal College training programs. Results of descriptive statistics determined that the overall educational experience was rated highly, with 98.9% of respondents satisfied or very satisfied with their overall patient care experience. Ninety-six percent of respondents were satisfied or very satisfied with the overall quality of teaching. Preparation for practice was identified as needing improvement, with 26% and 34% of respondents giving an unsatisfactory rating to career guidance and assistance with finding employment, respectively. Although 80% of respondents reported receiving ongoing feedback and 84% discussed their evaluations with their supervisors, only 38% of evaluations were completed by the end of the rotation. The results indicate that residents are generally satisfied with their experiences during residency training, especially with their overall educational experience. Areas of improvement include preparation for practice and timeliness of evaluations. Further iterations of this survey are needed to refine the instrument, identify data trends and maintain quality control in residency training programs. Frank JR (ed.). The CanMEDS competency framework: better standards, better physicians, better care. Ottawa: The Royal College of Physicians and Surgeons of Canada, 2005. Merritt, Hawkins and Associates. Summary Report: 2003 Survey of final-year medical residents. http://www.merritthawkins.com/pdf/MHA2003residentsurv.pdf. Accessed May 1, 2006. Regnier K, Kopelow M, Lane D, Alden A. Accreditation for learning and change: Quality and improvement as the outcome. The Journal of Continuing Education in the Health Professions 2005; 25:174-182.

System errors of manufacturers of medicines detected by conducting of state control in the area of circulation of medicines

2019 ◽  
Vol 2019 (5) ◽  
pp. 32-38
Author(s):  
Валентина Косенко ◽  
Valentina Kosenko ◽  
Алла Трапкова ◽  
Alla Trapkova ◽  
Светлана Тарасова ◽  
...  
Keyword(s):  
Quality Control ◽  
Quality Management ◽  
Management Systems ◽  
State Control ◽  
Quality Management Systems ◽  
Conducting State ◽  
Pharmaceutical Quality ◽  
State Quality ◽  
System Errors

The article conducts the analysis of system errors detected by Roszdravnadzor by conducting state quality control of circulating medicines, as well as weaknesses in pharmaceutical quality management systems of the manufacturers, that can influence the quality of manufactured drugs.

Sign in / Sign up

Export Citation Format

Share Document