Principle and method of optimization design for soft soil stabilizer

2009 ◽  
Vol 24 (1) ◽  
pp. 154-160 ◽  
Author(s):  
Xin Huang ◽  
Zhanguo Li ◽  
Jianguo Ning ◽  
Sheng Xu
Keyword(s):  
Optimization Design ◽  
Soft Soil ◽  
Soil Stabilizer

A Study of Stabilizer for Saline Sludge

2011 ◽  
Vol 477 ◽  
pp. 185-189 ◽  
Author(s):  
Zhan Guo Li ◽  
Yin Cheng ◽  
Xin Huang ◽  
Xiao Ming Shen
Keyword(s):  
Comparative Analysis ◽  
Portland Cement ◽  
Saline Soil ◽  
Soft Soil ◽  
Large Area ◽  
Soil Stabilizer ◽  
Stabilized Soil ◽  
Stabilization Effect ◽  
Tianjin Binhai New Area

There is large-area saline sludge which should be stabilized in China. However when cement is used as a stabilizer the strength and stabilization effect on the soil is relatively poor. In this paper, In this paper Portland cement PC is compared to a soft soil stabilizer A developed by the authors for use in stabilizing chloride saline soil from the Tianjin Binhai New Area. The strength of stabilized soil was tested by comparative Analysis, and XRD and SEM tests were used to analyze the hydrate types in stabilized soil. Preliminary tests results suggest that the salts present in hydraulic sludge and stabilizer A were able to react and formed a new hydrate----- Ca4Al2Cl2O6 • 10H2O which cannot be produced by cement alone, and which can greatly increase strength of stabilized soil.

scholarly journals Unconfined Compressive Strength Characteristics of Overboulder Asbuton and Zeolite Stabilized Soft Soil

2021 ◽  
Vol 7 (1) ◽  
pp. 40-48
Author(s):  
Noor Dhani ◽  
Ahmad Gasruddin ◽  
Hartini Hartini ◽  
La Baride
Keyword(s):  
Compressive Strength ◽  
Soil Stabilization ◽  
Soft Soil ◽  
Pozzolanic Reaction ◽  
Silica Content ◽  
Curing Time ◽  
Natural Pozzolan ◽  
Soil Stabilizer ◽  
Proctor Test ◽  
High Silica

Soft soil was one of the most widely encountered problems in construction, especially for archipelago countries which most of its area was lowland with a high deposit of soft soil. To overcome this problem, soil stabilization was one of the most widely used as a solution. Soil stabilization in general uses chemical substances that are classified as pozzolan material. Pozzolan material uses its capability to strengthen the cohesion of soil grains. Mostly, pozzolan material consists of silica. Overboulder asbuton and zeolite were examples of natural pozzolan material in Indonesia. Both materials have a high silica content. Thus, the author interested to figure out the mechanical behavior of these two substances as a soil stabilizer. This research was a correlating study to the previous paper with the same author which discusses the overboulder asbuton as a soil stabilizer. Overboulder added to the mix is determined as 15%, with varied zeolite percentages applied to examine the differences. The UCT was conducted according to ASTM D-2166 as a parameter. As the standard remolding method, a standard proctor test was conducted to determine the optimum moisture content and the maximum density of each mix. While the UCT specimens were tested at the certain curing time for each composition. The curing time applied was 0, 7, 14, and 28 days. By this curing period, the effective pozzolanic reaction that occurs for each composition could be determined. The result shows that zeolite addition to overboulder asbuton could increase the soil density and increase its compressive strength. It is indicated that overboulder asbuton and zeolite mix could be a proper alternative as a soil stabilizer. Doi: 10.28991/cej-2021-03091635 Full Text: PDF

Review of Soil Stabilization Techniques: Geopolymerization Method one of the New Technique

2015 ◽  
Vol 660 ◽  
pp. 298-304 ◽  
Author(s):  
Hazamaah Nur Hamzah ◽  
Mohd Mustafa Al Bakri Abdullah ◽  
Heah Cheng Yong ◽  
Mohd Remy Rozainy Arif Zainol ◽  
Kamarudin Hussin
Keyword(s):  
Soil Stabilization ◽  
Soft Soil ◽  
Soil Samples ◽  
Construction Process ◽  
Soil Stabilizer ◽  
Stabilized Soil ◽  
Moderate Load ◽  
Ucs Test ◽  
Problematic Soil

This paper studies the effectiveness of soil stabilizer on the problematic soil or soft soil. It is subjected to instability and massive primary and long term consolidation settlements when subjected to even moderate load increases. The purpose of this study is to review the techniques and materials that have been used in the soil stabilization by previous researchers. The performance of the soil stabilizer for stabilization by means of strength has been highlighted in this study. Unconfined compressive strength (UCS) test was carried out on stabilized soil samples and the results that obtained were discussed. The use of these techniques and materials may provide an inexpensive and advantageous construction process. As a conclusion, the strength of soil can be increased by using these materials and techniques in soil stabilization. This paper gives a comprehensive report on stabilization techniques and materials that have been used for soft soil and also discuss the potential of geopolymerization technology to be one of the new soil stabilization techniques.

scholarly journals Analysis and Prediction of Pavement Settlement Caused by Jacking Construction of Ultra-Shallow Rectangular Shield Frame Bridge

2020 ◽  
Vol 2020 ◽  
pp. 1-14
Author(s):  
Da Hu ◽  
Yongsuo Li ◽  
Xiaoqiang Liang ◽  
Youping Wu ◽  
Sheng Zhang ◽  
...  
Keyword(s):  
Prediction Model ◽  
Optimization Design ◽  
Soft Soil ◽  
Soil Layer ◽  
Road Surface ◽  
Surface Settlement ◽  
The Road ◽  
Site Monitoring ◽  
Deformation Law ◽  
Final Settlement

The primary purpose of this paper is to analyze and predict the ground settlement law of large-span rectangular shield frame bridge jacking project, to provide a reference for the optimization design and safe construction of similar projects. In this paper, combined with the jacking project of ultra-shallow buried soft soil layer rectangular shield frame bridge, through the on-site monitoring, the settlement deformation law of the longitudinal and transverse sections of the expressway pavement during the jacking construction process is discussed, and the reasons for the large settlement and rebound are analyzed. The basic laws of the road surface settlement with time are summarized. Based on the Kriging spatiotemporal prediction model, the road surface settlement is predicted. The research shows that the transverse settlement trough of the pavement caused by the rectangular shield frame bridge’s jacking construction is stable within 15 m–20 m on both sides toward the axis and symmetrical along the coordinate axis and the alignment roughly conforms to the normal distribution. The influence range of settlement trough becomes greater and greater with shield jacking, and the final settlement curve is W-shaped. After comparing the predicted curve with the measured road settlement curve, we found that the two curves are in good agreement, and the prediction result of the Kriging spatiotemporal prediction model is valid, which can reflect the process of road deformation development during the jacking process of the shield.

Study on Failure Mode of Underground Diaphragm Wall in Soft Soil Area

2013 ◽  
Vol 405-408 ◽  
pp. 1375-1382
Author(s):  
Shi Min Zhang ◽  
Xiang Li ◽  
Deng Hui Li ◽  
Zhi Ding ◽  
Gang Wei
Keyword(s):  
Failure Mode ◽  
Optimization Design ◽  
Failure Modes ◽  
Soft Soil ◽  
Diaphragm Wall ◽  
Wall Structure ◽  
Prevention Measures ◽  
Foundation Pit ◽  
Soft Soil Area ◽  
Soil Area

Zhejiang Province is Located in the Yangtze River Delta which the Soft Soil has Large Thickness and the High Underground Water Level.There is a Higher Requirement for the Optimization Design and Safety Construction of Deep Foundation.According to the Summary and Analysis of some Common Cause Failure of the Foundation Pit Engineering，we can Conclude that there are some Failure Mode in Soft Soil Area of Underground Diaphragm Wall Structure such as Foundation Pit System Instability，Basal Failure，Piping and the Flow of Sand Damage，Support Structure Instability and the Support of Low Strength or Buckling，and Summarizes some Prevention Measures on the Destruction of Underground Diaphragm Wall in the Light of these Failure Modes.

scholarly journals Structural Optimization Design of Ship Lock Heads on Soft Soil considering Time-Varying Effects of the Structure and Foundation

2021 ◽  
Vol 2021 ◽  
pp. 1-21
Author(s):  
Jiawei Bai ◽  
Chao Su ◽  
Heng Zhang ◽  
Shaopei Hu
Keyword(s):  
Structural Optimization ◽  
Optimization Design ◽  
Soft Soil ◽  
Optimization Procedure ◽  
Optimized Design ◽  
Time Varying ◽  
The Maximum Principle ◽  
Hybrid Particle Swarm Optimization ◽  
Whale Optimization ◽  
Ship Lock

Over time, the uneven settlements of the structure and foundation are prominent in constructing ship lock heads on soft soil. These deformations endanger the safety of ship lock heads during construction. This research aimed to establish the ship lock head’s structural optimization procedure on soft soil, considering the time-varying effects of the structure and foundation. By comprehensively considering the linear viscoelastic creep of concrete and the elastoplastic consolidation characteristic of soft soil, a perfect time-dependent analysis method for the lock head on soft soil was proposed. Furthermore, a hybrid particle swarm optimization, enhanced whale optimization, and differential evolution (PSO-EWOA-DE) algorithm was proposed to optimize thirty-four design variables of a lock head. With the minimal volume of the lock head as the optimization objective, the finite element model was established. In the optimization process, three types of constraints were evaluated. The result showed that the optimized design could reduce 10.45% of structure volume. Through comparing and analysing the maximum principle stresses and vertical displacements of the lock head before and after optimization, some conclusions were drawn. The optimization procedure proposed in this paper provides a new perspective for the structural optimization of hydraulic structures on soft soil.

scholarly journals The Influences of Bladder Properties on the Working Performance of the Multibladder-Type Inflatable Anchor

2021 ◽  
Vol 2021 ◽  
pp. 1-11
Author(s):  
Wen Xiang Peng ◽  
Ming Kai Xu ◽  
Yi Fan Chen ◽  
Bo Yuan ◽  
Zhuo Yang ◽  
...  
Keyword(s):  
Optimization Design ◽  
Field Experiments ◽  
Soft Soil ◽  
Control Variable ◽  
Engineering Practice ◽  
Foundation Pit ◽  
Engineering Construction ◽  
Deformation Control ◽  
Soil Foundation ◽  
Soft Soil Foundation

Due to the high bearing capacity and better controllability of bladder parameters, the multibladder-type inflatable anchor shows a great application prospect in the engineering construction in soft soil areas. In this study, based on a soft soil foundation pit project in Guangzhou Province, China, the multibladder-type inflatable anchor was applied to the engineering practice for the first time, and the working characteristics of the multibladder-type inflatable anchor were analyzed and discussed through field experiments. Primarily, the optimization design and experimental facility of the multibladder-type inflatable anchor were introduced in detail to realize the refinement and perfection of the anchorage technological process. Besides, the influence degrees of the bladder number, diameter, thickness, space, and length on the bearing characteristics and deformation control of the anchor were studied by using the control variable method, as well as the influencing mechanisms. Subsequently, the advantages of the multibladder-type inflatable anchor were presented by comparing its anchoring efficacy with that of the traditional grouting anchor. Ultimately, the analysis results were used to verify the reliability of the multibladder-type inflatable anchor and provide the experimental basis for its popularization and application.

Shear Strength Behaviour of Canlite-Treated Laterite Soil

2015 ◽  
Vol 72 (3) ◽  
Author(s):  
Nor Zurairahetty Mohd Yunus ◽  
Yong Chin Yung ◽  
Ng Teck Wei ◽  
Norliana Abdullah ◽  
Noordiana Mashros ◽  
...  
Keyword(s):  
Soft Soil ◽  
Geotechnical Properties ◽  
Lateritic Soil ◽  
Unconfined Compression ◽  
Laterite Soil ◽  
Atterberg Limit ◽  
Soil Stabilizer ◽  
Limit Test ◽  
Effective Stabilizer ◽  
Ucs Test

This research is to determine the geotechnical properties of laterite soil which are modified with liquid soil stabilizers namely Canlite (SS299). The soft soil samples which are from hilly area atFaculty of Electrical and Electronic, Universiti Teknologi Malaysia, Skudai was used in this research. Physical properties tests that were conducted are Atterberg Limit test, Standard Proctor Compaction test (SPC) while mechanical properties test are Unconfined Compressive Strength (UCS) test. All these tests were conducted in accordance to BS1377:1990. The results showed that SS299 soil stabilizer is able to improve the geotechnical properties of the laterite soil. The unconfined compression strength increased with the curing period, the variation mainly occurring in the first 28 days. Canlite soil stabilizer was therefore finding as an effective stabilizer for lateritic soil.

Numerical Study of Low Gravity Effect on the Pressure-Sinkage Characteristics of Soft Soil

2011 ◽  
Vol 101-102 ◽  
pp. 488-491
Author(s):  
Gui Fen Zhou ◽  
Guang Ming Chen ◽  
Rui Zhang ◽  
Shu Cai Xu ◽  
Jian Qiao Li
Keyword(s):  
Laboratory Testing ◽  
Optimization Design ◽  
Numerical Study ◽  
Soft Soil ◽  
Three Dimensional ◽  
Low Gravity ◽  
Earth Gravity ◽  
The Earth ◽  
Gravity Changes ◽  
Testing Data

The adhesion and the compressibility of the soft soil will vary as the earth gravity changes. In this study, the pressure-sinkage characteristics in low gravity conditions were investigated by three-dimensional Discrete Element Method (DEM). The data of the DEM parameters were obtained by analyzing the pressure-sinkage relationship embedded in laboratory testing data. The pressure-sinkage experiments of the sample soil in different gravities were simulated by using the software PFC3D. Using the Bekker formula, the values of pressure-sinkage parameters were obtained. The results show that, when the earth gravity changes from one sixth of the standard earth gravity to the standard earth gravity, the sinkage exponent increases lineally. The cohesive module of deformation increases along the conic trend. The low gravities have a sensitive affect on the data of the frictional module of deformation, and the data distribute beside a line. The change laws of the pressure-sinkage parameters provide instructions for the optimization design of vehicles working in low gravity field planet.

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