Application of Dynamic-Static Drainage Consolidation Method on a Silty Ground of Guangzhou

2011 ◽  
Vol 403-408 ◽  
pp. 1405-1408 ◽  
Author(s):  
Li Juan Zhang ◽  
Zhang Ming Li
Keyword(s):  
Pore Water Pressure ◽  
Water Pressure ◽  
Time Frame ◽  
Dynamic Compaction ◽  
Residual Effects ◽  
Soft Ground ◽  
Reasonable Time ◽  
Reasonable Time Frame ◽  
Load Tests ◽  
Compaction Method

The treatment of a silty ground for petroleum product storage facilities in Guangzhou with dynamic-static drainage consolidation method which is based on based on combining the dynamic compaction method and the static consolidation is presented. The pore water pressure, settlement, field vane shear strength, bearing capacity through plate load tests have clearly shown that this method can significantly strengthen the silt ground within reasonable time frame. The soft ground has been improved under the dynamic and static forces and their residual effects.

Application Study on Dynamic Compaction Technology in Mine Tailings Foundation Reinforcement

2012 ◽  
Vol 170-173 ◽  
pp. 3054-3058
Author(s):  
Jiao Long He ◽  
Zhong Ai Jiang
Keyword(s):  
Mine Tailings ◽  
Pore Water Pressure ◽  
Water Pressure ◽  
Field Testing ◽  
Standard Penetration Test ◽  
Dynamic Compaction ◽  
Application Research ◽  
Loading Test ◽  
Application Study ◽  
Compaction Method

The dynamic compaction parameters and measures for tailings foundation are proposed based on actual engineering field testing result.Results of field loading test,standard penetration test and pore water pressure test show that when tailings foundation is reinforced by dynamic compaction method,the bearing capacity value is greater than 130kpa.These provide a reference to application research of dynamic compaction in the tailings foundation.

Experimental Study on Dynamic Compaction-Plastics Drain Board Method in Backfill Subgrade Reinforcement

2011 ◽  
Vol 474-476 ◽  
pp. 2032-2036
Author(s):  
Yong Ma ◽  
Mao Tian Luan ◽  
Zhong Chang Wang
Keyword(s):  
Experimental Study ◽  
Pore Water ◽  
Pore Water Pressure ◽  
Water Pressure ◽  
Soft Soil ◽  
Time Effect ◽  
Dynamic Compaction ◽  
Excess Pore Water Pressure ◽  
Compaction Method ◽  
Excess Pore

Plastics drain board method is one of the most effective ways of reducing excess pore water pressure during the process of dynamic compaction in soft soil subgrade reinforcement. Based on field test in neritic backfilled area of Jinzhou Port 207B berth, the pore water pressure, groundwater level, subgrade bearing capacity and time effect of deformation have been measured and analyzed. The application of dynamic compaction-PDB method makes a mighty advance of the dynamic compaction method, which provides a new way for soft soil treatment in coastal areas.

scholarly journals Reasonable time frame in bankruptcy proceedings: Analysis of cases from the judicial practice of the Commercial Court in Niš

2021 ◽  
Vol 60 (90) ◽  
pp. 97-118
Author(s):  
Aleksandar Mojašević ◽  
Aleksandar Jovanović
Keyword(s):  
Case Law ◽  
Time Frame ◽  
Fair Trial ◽  
Fundamental Rights ◽  
Reasonable Time ◽  
Judicial Practice ◽  
Reasonable Time Frame ◽  
The Subject ◽  
The Republic ◽  
The Right

The Act on the Protection of the Right to a Trial within a Reasonable Time, which took effect in 2016, has created the conditions in our legal system for the protection of the right to a trial within a reasonable time, as one of the fundamental rights guaranteed by the Constitution of the Republic of Serbia and related international documents. Although the legislator does not explicitly provide for the application of this Act in the context of bankruptcy proceedings, it has been used in judicial practice as a mean for the bankruptcy creditors to obtain just satisfaction in cases involving lengthy bankruptcy proceedings and a violation of the right to a fair trial within a reasonable time. The subject matter of analysis in this paper is the right to a trial within a reasonable time in bankruptcy cases. For that purpose, the authors examine the case law of the Commercial Court in Niš in the period from the beginning of 2016 to the end of 2019, particularly focusing on the bankruptcy cases in which complaints (objections) were filed for the protection of the right to a fair trial within a reasonable time. The aim of the research is to examine whether the objection, as an initial act, is a suitable instrument for increasing the efficiency of the bankruptcy proceeding, or whether it only serves to satisfy the interests of creditors. The authors have also examined whether this remedy affects the overall costs and duration of the bankruptcy proceeding. The main finding is that there is an increasing number of objections in the Commercial Court in Niš, which still does not affect the length and costs of bankruptcy. This trend is not only the result of inactivity of the court and the complexity of certain cases but also of numerous external factors, the most prominent of which is the work of some state bodies.

Static response of fly ash columnar improved ground

2001 ◽  
Vol 38 (2) ◽  
pp. 276-286 ◽  
Author(s):  
A Porbaha ◽  
T BS Pradhan ◽  
T Kishida
Keyword(s):  
Fly Ash ◽  
Stress Concentration ◽  
Pore Water Pressure ◽  
Water Pressure ◽  
Triaxial Compression ◽  
Area Ratio ◽  
Stress Redistribution ◽  
Soft Ground ◽  
Compression Tests ◽  
Composite Ground

This study presents the results of a series of monotonic undrained triaxial compression tests on clay specimens improved by columnar reinforcement. The process of loading and stress redistribution of a fly ash – clay specimen (FCS), in comparison with a sand–clay specimen (SCS), is examined in terms of stress–strain characteristics, generation of excess pore-water pressure, effective and total earth pressures, development of stress concentration, and the normalized undrained shear strength of the improved soil. It was found, predictably, that the deviator stress of the composite specimens was influenced by the consolidation stress, replacement area ratio, and properties of the column material. The stress concentration at the top of the composite ground which depends on the loading stage reaches a peak after the consolidation state and is reduced due to stress redistribution between the column and the soft ground. In terms of improvement effects, the mean shear strengths of FCS and SCS relative to the clay specimen are three and seven times greater, respectively, for a replacement area ratio of 49%.Key words: composite ground, fly ash, soil improvement, soft ground, triaxial test.

Study on the Changing Rule of Excess Pore Water Pressure during Dynamic Compaction

2011 ◽  
Vol 90-93 ◽  
pp. 2254-2257 ◽  
Author(s):  
Xiao Jing Li ◽  
Kai Yao ◽  
Shao Chun Zhu ◽  
Xiang Hong Pan
Keyword(s):  
Pore Water ◽  
Pore Water Pressure ◽  
Water Pressure ◽  
Test Area ◽  
Dynamic Compaction ◽  
Horizontal Distance ◽  
Excess Pore Water Pressure ◽  
The Third ◽  
Effective Reinforcement ◽  
Excess Pore

The changing rule of excess pore water pressure during dynamic compaction is important for construction. The following conclusions could be drawn by observing and analyzing the excess pore water pressure in test area. Under ramming strike energy of 2000kN•m, the best hit number during the 1~2 times is 8~9, the best hit number during the third time is 6~8. After compaction, the shallow excess pore water pressure is basically larger than the deep. The shallow excess pore water pressure needs more time to dissipate. The horizontal distance of the shallow excess pore water pressure is larger than that of the deep. During the dissipating process of the pore water pressure, we should pay attention to avoid vibration interference of load in the surface and prevent liquefaction of the powder soil. Under ramming strike energy of 2000kN•m, the biggest influence depth of dynamic compaction is 8～9m, the effective reinforcement depth is 6～8m. The conclusions can provide the theoretical basis for dynamic compaction construction.

CFD Challenge: Application of the Commercial Finite Element Solver FIDAP in a Clinical Setting

2012 ◽  
Author(s):  
Merih Cibis ◽  
Jolanda J. Wentzel ◽  
Frank J. H. Gijsen
Keyword(s):  
Finite Element ◽  
Shear Stress ◽  
Carotid Arteries ◽  
Time Frame ◽  
Academic Hospital ◽  
Close Collaboration ◽  
Desktop Computer ◽  
Reasonable Time ◽  
Finite Element Software ◽  
Reasonable Time Frame

The Rotterdam group mainly focuses on the influence of shear stress on plaque localization and progression in human coronary and carotid arteries. Since we are in an academic hospital, we always have been working in close collaboration with cardiologists and radiologists. Since clinicians do not have the time or the sources that academic engineering groups have, we limited ourselves to perform the simulations on a standard desktop computer (Intel Xeon six core processor, 2.40 GHz CPU and 12 GB RAM) using commercial finite element software (FIDAP 8.7.4 with GAMBIT 2.4.6) within a reasonable time-frame (the weekend). The simulations were carried out by our PhD student Merih Cibis.

scholarly journals Effect of Improvement and Application of Composite Prefabricated Vertical Drain Method in Marine Soft Ground: A Case Study

2019 ◽  
Vol 2019 ◽  
pp. 1-18 ◽  
Author(s):  
Jianqing Jiang ◽  
Reqiang Liu
Keyword(s):  
High Speed ◽  
Pore Water Pressure ◽  
Water Pressure ◽  
Ground Improvement ◽  
Field Monitoring ◽  
Hyperbolic Model ◽  
Soft Ground ◽  
Prefabricated Vertical Drains ◽  
Prefabricated Vertical Drain

One of the commonly used techniques to improve marine soft ground is the drainage consolidation method by plastic board drains (PBDs). But some complex marine soft ground will cause construction inconvenience of PBDs in certain areas of these sites, thus affecting the improvement effect. An alternative possible approach to overcoming these deficiencies may be the combination of PBDs and sand wick drains (SWDs) (i.e., composite prefabricated vertical drains (CPVDs)) as vertical drainage channels in the same site. In order to verify the suitability and performance of this method in marine soft ground improvement, a case study was performed based on the field monitoring and construction of the marine soft ground of an intercity express railway project in China. The construction procedure using the CPVD system, the field monitoring instrumentation scheme, and the design of fill surcharge level were described, and the field monitoring data were presented. The settlement characteristics, dissipation features of pore water pressure, and the horizontal movement pattern were assessed. In addition, predictions of ultimate settlement, postconstruction settlement, and consolidation degree were discussed by applying a modified hyperbolic model. The results show that the marine ground improved by the CPVD system is suitable for the construction of intercity express railway and high-speed railway. The improvement construction period of complex marine soft ground will be greatly shortened by the proposed parallel construction programme. This work will provide technical supports and application reference for the improvement of the similar marine soft ground.

Test Research on Single Point Impact of a Liquid Foundation

2011 ◽  
Vol 415-417 ◽  
pp. 869-874
Author(s):  
Yun Cao
Keyword(s):  
Pore Water ◽  
Pore Water Pressure ◽  
Water Pressure ◽  
Single Point ◽  
Horizontal Displacement ◽  
Dynamic Compaction ◽  
Before And After ◽  
Engineering Parameters ◽  
Ground Heave ◽  
The Relationship

Dynamic compaction is a widely used method for subgrade treatment due to its merit. This article presented example of dynamic compaction test in a liquid foundation project and investigated the relationship between settlement, ground heave and drop counts, the relationship between horizontal displacement and depth of soil, the relationship between drop counts, depth, horizontal displacement and pore water pressure, and the relation curve of pore water pressure and time during single point impact test. According to the conclusion before and after the testing, some appropriate engineering parameters were obtained and some advices were put forward.

scholarly journals Verification of Improvement Effect of Vibrational Compaction Method with Absorbing Excess Pore Water Pressure at Gravelly Ground.

1999 ◽  
pp. 261-274
Author(s):  
Kusukatu YUASA ◽  
Shigeru SAKAIDA ◽  
Hiroshi KAWASE ◽  
Takeshi ISHIGURO ◽  
Hideki SHIMIZU ◽  
...  
Keyword(s):  
Pore Water ◽  
Pore Water Pressure ◽  
Water Pressure ◽  
Excess Pore Water Pressure ◽  
Improvement Effect ◽  
Compaction Method ◽  
Excess Pore

scholarly journals EFEK GAYA VERTIKAL PADA TANAH DENGAN INDEKS PLASTISITAS TINGGI TERHADAP WILAYAH SEKITAR PROYEK DI JAKARTA UTARA

2020 ◽  
Vol 3 (2) ◽  
pp. 487
Author(s):  
Staventram Inri ◽  
Alfred Jonathan Susilo
Keyword(s):  
Bearing Capacity ◽  
Soil Compaction ◽  
Shear Failure ◽  
Pore Water Pressure ◽  
Water Pressure ◽  
Soil Improvement ◽  
Dynamic Compaction ◽  
Lateral Movement ◽  
Theoretical Predictions ◽  
Driven Pile

Soil improvement is common in construction work to increase the bearing capacity of the soil so the soil can carry the burden of construction which will stand on that soil. The method often used is soil compaction to increase bearing capacity. Soil compaction results in a lateral movement of soil particles and causes an increase in soil pore water pressure. Soil compaction here uses drum roller and dynamic compaction. This gives an effect at a certain distance and has the potential to damage the surrounding buildings. Therefore, the engineer needs to predict a safe distance from the effects of the compaction process. This research conducted with theoretical predictions about the amount of lateral movement due to compaction with certain formulas. The same thing will happen when the driven pile is piling, it will cause around the pile lift up (pile heaving). The results of this theoretical prediction will be compared then compare with the results of measurements of lateral movements performed using general shear failure from Terzaghi method and stress distribution Boussinesq method. Both of the results will be compared as conclusions.AbstrakPerbaikan tanah sudah umum dilakukan dalam pekerjaan konstruksi dengan tujuan untuk meningkatkan daya dukung tanah agar dapat memikul beban konstruksi yang akan berdiri di atasnya. Metode yang sering digunakan yaitu pemadatan tanah untuk meningkatkan daya dukungnya. Pemadatan tanah mengakibatkan desakan butiran tanah ke arah lateral serta menimbulkan kenaikan tekanan air pori tanah. Pemadatan disini menggunakan tandem roller dan dynamic compaction. Hal ini memberikan pengaruh hingga jarak tertentu dan berpotensi merusak bangunan di sekitar. Oleh karena itu, perlu diprediksi jarak yang aman dari pengaruh proses pemadatan. Penelitian ini dilakukan dengan prediksi teoritis besarnya pergerakan tanah ke arah lateral akibat pemadatan dengan formula tertentu. Hal yang serupa juga sama ketika tiang pancang ditumbuk, akan menyebabkan tiang di sebelahnya terangkat (pile heaving). Hasil prediksi secara teori ini kemudian dibandingkan dengan hasil pengukuran kegagalan geser berdasarkan metode Terzaghi dan distribusi tegangan Boussinesq. Hasil keduanya akan dibandingkan sebagai kesimpulan.

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