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.

Applied Research on Dynamic Replacement Method in Tailings Residue Subgrade Reinforcement

2013 ◽  
Vol 639-640 ◽  
pp. 943-946
Author(s):  
Jiao Long He ◽  
Yong Zhou ◽  
Zhong Ai Jiang
Keyword(s):  
Applied Research ◽  
Pore Water Pressure ◽  
Water Pressure ◽  
Field Testing ◽  
Standard Penetration Test ◽  
Load Test ◽  
Test Results ◽  
Replacement Method ◽  
Dynamic Replacement ◽  
Testing Experiment

Based on the reinforcing mechanism of dynamic replacement method ,this article put forward the construction parameters and measures of dynamic replacement method , combining with the result of actual engineering field testing experiment. The field load test, standard penetration test and pore water pressure test results show that the characteristic value of subgrade bearing capacity is more than 130 kpa when the tailings residue subgrade has been managed with dynamic replacement method, providing references for applied research on dynamic replacement method in tailings residue subgrade reinforcement.

Application Research of the Dynamic Compaction Method with Precipitation in Foundation Treatment Dredger Fill

2012 ◽  
Vol 226-228 ◽  
pp. 1111-1114
Author(s):  
Fei Xuan ◽  
Chao Qun Peng ◽  
Yan Jia
Keyword(s):  
Field Testing ◽  
Dynamic Compaction ◽  
Application Research ◽  
Testing Scheme ◽  
Foundation Treatment ◽  
Dredger Fill ◽  
Compaction Method

In the view of the actual project, this paper analyses the credit problems of the foundation treatment, from the three aspects of the location, the shallow blow fill and the pile’s negative firctio- n. Then this paper especially studies the field testing scheme about the dynamic compaction method with precipitation, based on the analysis of the percussive compaction method with precipitation, the dynamic compaction method with precipitation and packless vibroflotation method. Meanwhile, the operated steps and the attention of the construction have been enucleated.

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.

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.

Study on Reinforce Saturated Soft Clay Foundation with Dynamic Consolidation by Drainage

2013 ◽  
Vol 438-439 ◽  
pp. 1171-1175
Author(s):  
Zhi Li Sui ◽  
Zhao Guang Li ◽  
Xu Peng Wang ◽  
Wen Li Li ◽  
Tie Jun Xu
Keyword(s):  
Pore Water ◽  
Pore Water Pressure ◽  
Water Pressure ◽  
Soft Clay ◽  
Soil Layer ◽  
Good Effect ◽  
Loading Test ◽  
Test Plate ◽  
Dynamic Consolidation ◽  
Saturated Soft Clay

Dynamic consolidation method has been widely used in improving soft land, but always inefficient to saturated soft clay land, which is hard to improve, and even leads to rubber soil. Dynamic and drain consolidation method will deal with it well, with drainage system, pore-water can be expelled instantly from saturated soft clay as impacting. The pore-water pressure and earth pressure test in construction, the standard penetration test, plate loading test, geotechnical test after construction, which are all effective methods for effect testing. There is a comprehensive detection through different depth of soil layer with different detecting means on construction site. The results show that improving saturated soft clay land with dynamic and drain consolidation method has obtained good effect, and the fruit can be guidance for such construction in the future.

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.

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.

Membrane filter properties and application of the filter to undrained cyclic triaxial test of unsaturated materials

2017 ◽  
Vol 54 (8) ◽  
pp. 1196-1202 ◽  
Author(s):  
Hailong Wang ◽  
Junichi Koseki ◽  
Tomoyoshi Nishimura ◽  
Yukika Miyashita
Keyword(s):  
Hydraulic Conductivity ◽  
Cyclic Loading ◽  
Pore Water ◽  
Pore Water Pressure ◽  
Membrane Filter ◽  
Water Pressure ◽  
Characteristic Curve ◽  
Loading Frequency ◽  
Loading Test ◽  
Pressure Plate

Properties of the membrane filter recently introduced as an alternative to the ceramic disk are revealed through diffusion and hydraulic conductivity tests. It is shown that diffusion of air through the membrane filter is significantly affected by suction magnitude and that hydraulic conductivity of the membrane filter can easily be affected by the quality of water used in the test. The application of the membrane filter to the soil-water characteristic curve tests (SWCC tests) shows that similar SWCCs can be obtained by employing pressure plate apparatuses with either the ceramic disks or the membrane filter installed, and that repeatability of the SWCC by using the membrane filter pressure plate apparatus is reasonably good. The application of the membrane filter to the undrained cyclic loading test of unsaturated sandy materials shows that the response (the duration to measure the equilibrated pore-water pressure of unsaturated materials) of the membrane filter pedestal in a modified triaxial system may be as short as ∼2 s in certain test conditions, and fairly good pore-water pressure and air pressure measurements can be obtained during undrained cyclic loading with a loading frequency of 0.1 Hz.

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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