scholarly journals Study on the strength influence of pile driving disturbance on the surrounding soil

2019 ◽  
Vol 136 ◽  
pp. 04078
Author(s):  
B. Li
Keyword(s):  
Compressive Strength ◽  
Shear Stress ◽  
Laboratory Test ◽  
Unconfined Compressive Strength ◽  
Soil Property ◽  
Pile Driving ◽  
Strength Index ◽  
Drilling Depth ◽  
Undisturbed Soil ◽  
Surrounding Soil

The research on the strength influence of pile driving disturbance on the surrounding soil on marine environment is very less. This article is an actual pile driving project in the sea, the soil samplings with different distance from pile was taken and some laboratory test was done, the influence of soil property when pile driving is founded. According to the experimental results, the shear stress parameter and unconfined compressive strength index of soil in the hole increased with the increase of drilling depth, and the unconfined compressive strength index of soil in the hole nearly returned to the level of undisturbed soil 39 days after piling.

Stabilization of Marine Clay by Biomass Silica (Non-Traditional) Stabilizers

2014 ◽  
Vol 695 ◽  
pp. 93-97 ◽  
Author(s):  
Aminaton Marto ◽  
Nor Zurairahetty Mohd Yunus ◽  
Faizal Pakir ◽  
Nima Latifi ◽  
Ahmad Hakimi Mat Nor ◽  
...  
Keyword(s):  
Compressive Strength ◽  
Laboratory Test ◽  
Unconfined Compressive Strength ◽  
Laboratory Tests ◽  
Clay Soils ◽  
Development Work ◽  
Content Increase ◽  
Marine Clay ◽  
Testing Program ◽  
Marine Clays

The presence of marine clay in Iskandar Malaysia Region, Nusajaya had caused expensive solutions in the construction of structures and roads. Alternatively, soil treatment is suggested to increase the strength of the unsuitable material to meet the constructions requirement for foundation and also to achieve the specifications for development work. In this study, a series of laboratory test has been conducted to determine the potential of Biomass Silica (BS), one of the commercial brands namely “SH-85” to stabilize marine clay to form the basis of a strong, reliable land for construction of roads and building. Testing program involves obtaining specimens of marine clays from various locations at Iskandar Malaysia Region, followed by laboratory tests to determine the Atterberg limits and Unconfined Compressive Strength (UCS) for treated and untreated of marine clay soils. The proportions of BS added were 3, 6, 9, 12 and 15% and tested at 0, 3, 7 and 28 days curing periods. The results shows that the Plasticity Index (PI) was reduce with increment of BS content. While, an addition of BS content increase in strength treated soils 60 times more than untreated soils, which is gain in early 7 curing days period. This finding indicates the BS is a suitable stabilizer for the marine clay to become strong foundation for construction of road and building.

scholarly journals Evaluation Method for Thixotropy of Clay Subjected to Unconfined Compressive Test

2021 ◽  
Vol 9 ◽  
Author(s):  
Bin Tang ◽  
Biaohe Zhou ◽  
Liang Xie ◽  
Jianfeng Yin
Keyword(s):  
Compressive Strength ◽  
Unconfined Compressive Strength ◽  
Evaluation Method ◽  
Curing Time ◽  
Recovery Coefficient ◽  
Undisturbed Soil ◽  
Structural Recovery ◽  
The Index System ◽  
The Relationship

Thixotropy is a hot topic in the field of rheology of dispersed systems. Studying the quantitative index and evaluation method for thixotropy of clay is of great significance to evaluate the safety of foundation under long-term load. To explore the index system and classification methods for the thixotropy of clay, unconfined compressive strength tests were carried out on three groups of undisturbed soil and remolded soil that were cured at different times after remodeling of the Zhanjiang Formation in China to obtain the unconfined compressive strength values of the samples and establish the relationship between unconfined compressive strength and curing time of the remodeled soil. The concept of thixotropic sensitivity is introduced to reflect the relationship between thixotropy and structure. According to the relationship between thixotropy sensitivity and curing time and its logarithmic value, two indexes of structural recovery coefficient K and structural recovery index Ke were established to evaluate the thixotropy of structural clay in the Zhanjiang Formation. Following the structural classification method of soil, the boundary values of structural recovery coefficients KI and KII are calculated to classify the thixotropy of soil. When the value of K is less than that of KI, the thixotropy of soil is weak. When the value of K is greater than that of K but less than that of KII, the thixotropy of soil is moderate. When the value of K is greater than that of KII, the thixotropy of soil is strong. The method is used to discuss the thixotropy of soil in the literature, and the rationality of the method is verified. Results show that this method can be used to preliminary classify the thixotropy of soil.

Indoor Experimental Research on the Unconfined Compressive Strength of Lime Improving Expansive Clay

2011 ◽  
Vol 250-253 ◽  
pp. 2296-2301
Author(s):  
Ai Jun Chen ◽  
Jia Sheng Zhang ◽  
Li Ying Peng ◽  
Zhen Hua Ren
Keyword(s):  
Compressive Strength ◽  
Experimental Research ◽  
Unconfined Compressive Strength ◽  
Expansive Soil ◽  
Linear Increase ◽  
Expansive Clay ◽  
Curing Time ◽  
Guangxi Province ◽  
Strength Index ◽  
The Stability

Guangxi province is the typical expansive soil area, and the unconfined compressive strength is the important strength index. There is little studied result about the unconfined compressive strength of expansive soil in Guangxi province. Based on the expansive clay experimental embankment of Nanyou Highway, the experimental research on the unconfined compressive strength was undertaken. Tests results indicate that the expansive clay samples are all disintegrated when the sample is dip in water, which show that the stability of expansive clay is very weak. Some lime improving samples of curling 7 days and 14 days are also disintegrated when dipping in water, which indicate that the unconfined compressive strength sample of lime improving expansive clay should curl 28 days. Lime ratio and curing time both influence the unconfined compressive strength of improving expansive clay greatly. There is optimum adding lime ratio for lime improving expansive clay. During the early days of curing the unconfined compressive strength have linear increase with curing time.

Study of Strong Interlocked Skeleton Dense Gradation for Cement-Stabilized Macadam

2013 ◽  
Vol 438-439 ◽  
pp. 644-648 ◽  
Author(s):  
Zhe Jiang Chen ◽  
Jin Shun Xue ◽  
Fan Cao ◽  
Ying Jun Jiang
Keyword(s):  
Compressive Strength ◽  
Laboratory Test ◽  
Unconfined Compressive Strength ◽  
Asphalt Pavement ◽  
California Bearing Ratio ◽  
Mineral Aggregate ◽  
Design Specifications ◽  
Performance Result ◽  
Road Performance ◽  
Composition Structure

In order to improving the performance of Cement-stabilized Macadam (CSM), analyzing the influences of its composition structure on performance, and then putting forward the gradation design principles and strong interlocked framework dense gradation (SISDG), laboratory test was adopted to verify its road performance. Result shows that CSM has the feature of the amount of aggregate above 9.5 mm, below 4.75 mm and 0.075 mm are more, while the amount of aggregate 4.75-9.5 mm is less, and the California Bearing Ratio (CBR) value of mineral aggregate with SISDG is increased by 8~14% comparing with mineral aggregate with the framework dense-graded (DSDG) presented in Design Specifications of Highway Asphalt Pavement (JTG D50-2006) gradation. Compared with CSM with DSDG, 28d unconfined compressive strength (UCS), ultimate UCS and splitting strength of CSM with SISDG are respectively increased by 6~12%, 8~20% and 8~15%.

scholarly journals Effect of Waste Tire Reinforcement with and without Cement Additives on Peat Strength Improvement

2021 ◽  
Vol 411 ◽  
pp. 121-133
Author(s):  
Nur Amalina Hilwane ◽  
Norazzlina M. Sa’don ◽  
Abdul Razak Abdul Karim
Keyword(s):  
Compressive Strength ◽  
Shear Stress ◽  
Moisture Content ◽  
Unconfined Compressive Strength ◽  
Ground Improvement ◽  
Optimum Moisture Content ◽  
Scrap Tire ◽  
Waste Tire ◽  
Ucs Test ◽  
Shear Box

This paper presents the peat ground improvement techniques using waste-tire as a fibre reinforced material. In this study, two sizes of the waste-tire are chosen, which are 0.05 mm and 1-3 mm, respectively. The collected peat is classified as Sapric peat with the degree of decomposition of H7 based on von Post classification with high moisture content of 400% was recorded. The Sapric peat is treated with the waste-tire at designated percentages of 5%, 10% and 15% with the addition of 5% of cement acting as a binder. The untreated and treated peat without and with cement content are compacted at the optimum moisture content for both the Unconfined Compressive Strength (UCS) test and Direct Shear Box Test. The specimens were air-cured for 7, 28, 56, and 90 days. Hypothetically, higher percentages of rubber improve the shear stress value of the treated peat. According to the results the finer size (0.05mm) of the tire produces a higher shear stress, which may due the finer sizes of the waste-tire filled the void between the soil particles. Further, from the 90 days of curing UCS results, there is a significant increase in compressive strength with the increase percentage of the waste-tire peat mixed samples. In summary, soil stabilized by the scrap-tire is believed to decrease the optimum moisture content and the maximum dry densities, but it helps in increasing the unconfined compressive strength value. Stabilizing by using the tire wastes not only increasing the strength of the soil, but it also helps in reducing the disposal problems.

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