Hong Liu

Hong Liu
Chongqing University | CQU · School of Civil Engineering

MS

About

268
Publications
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Introduction
Hong Liu currently studies in the School of Civil Engineering, Chongqing University. Hong does research in Soil Mechanics, Environmental Engineering and Civil Engineering. Their most recent publication is 'Influence of temperature on the volume change behavior of saturated sand'.

Publications

Publications (268)
Article
Calcareous sand, a special geotechnical material for foundations of ocean engineering infrastructure, experiences different types of significant dynamic loads and are sensitive to seismic liquefaction. Desaturation is one of novel methods to treat liquefiable sand. In this research, a self-developed desaturation test device was used to evaluate the...
Article
Full-text available
The failure mechanism of biocemented sand has been largely speculated based on scanning electron microscopy (SEM) images of biocemented sand after mechanical tests. However, some breakage patterns cannot be directly observed, such as the separation of CaCO3 crystals and the separation of CaCO3 crystals and sand surfaces. A study of the breakage pro...
Article
Particle breakage and particle shape are two prominent characteristics of carbonate sand. In this study, a series of drained shearing tests with different axial strains and confining pressures were performed to investigate particle-breakage development and particle-shape evolution under triaxial loading conditions. In addition, the correlations bet...
Article
Recognizing the patterns of partial discharge (PD) is the key to assessing the hazard level of PD. This paper proposes an oil-immersed transformer PD pattern recognition method based on a multifrequency fiber-optic Fabry-Perot (F-P) ultrasound sensing array and deep learning. Three F-P ultrasonic probes with different resonance bands were used to f...
Article
Urban underground comprehensive pipe galleries (referred to as UCPGs) often have large rectangular cross-sections and are now widely used as underground tunnel spaces for accommodating various engineering pipelines used for power, signal communication, gas, oil, heating, water supply and drainage channels in China. The force-displacement relation f...
Article
Full-text available
Ocean development is an effective and practical way to address resource issues, such as food, fuel, and land shortage. The current work proposed using kaolin-based biocement to stabilize calcareous sand which is always the main component of the foundations of ocean engineering. Five kinds of kaolin concentrations (0 g/L, 10 g/L, 20 g/L, 50 g/L, and...
Preprint
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Calcareous sand deposits are widely distributed along the shoreline in ropical and subtropical regions. Microbially induced calcite precipitation treatment (MICP) is a relatively new method to improve the stiffness and strength of the soil. Little is known about the small-strain shear modulus and damping ratio of MICP-treated calcareous sand, which...
Article
Full-text available
粗粒料广泛应用于水利大坝、公路铁路路基及机场高填方边坡等对强度及变形要求较高的基础设施中。 粗粒料颗粒粒径及颗粒强度离散性较其他岩土颗粒材料大,且在外荷载作用下易发生破碎;微生物胶结作为一 种新型的绿色胶结方式,可以改善粗粒料的力学特性,抑制颗粒破碎。文章首先介绍了粗粒料颗粒强度相关理 论分析方法:包括 Weibull 分布理论、尺寸效应、分形维数、雪崩动力学理论等;随后总结了研究粗粒料颗粒 强度及变形特性的室内试验方法与技术:包括单颗粒破碎试验、一维压缩试验、声发射监测系统及微生物胶结 技术;最后从粗粒料类别、外部环境因素、颗粒粒径、微生物胶结情况等方面对粗粒料单颗粒破碎试验和一维 压缩试验结果进行分析,阐明了相关因素对颗粒强度、Weibull 模量、压缩性、破碎量、声发射能量及能量耗散...
Article
Full-text available
Scour can cause the water-induced failure of fluvial and marine bridges and structures. Previous studies have focused on the scour mechanisms and their effects on the load capacity of single piles, although deep foundations consist mostly in pile groups. In this paper, scouring on pile groups embedded in soft clay is studied when piles are laterall...
Article
Full-text available
Drainage rigid piles represent a commonly used antiliquefaction treatment for saturated sand foundations. Small-scale model tests on the liquefaction-resistant characteristics of drainage rigid piles subjected to blasting were conducted in this study. The effect of ordinary rigid piles and drainage rigid piles on the disposal of saturated sand foun...
Article
Full-text available
Under cyclic loading, particle breakage occurs at gravelly soil-structure interface, resulting in the decrease of interface strength and the increase of normal displacement. Based on the theory of critical state soil mechanics, the modified Cam-Clay model (MCC) was extended to the plane strain condition of the interface, the state parameter was int...
Article
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jats:p> In this study, the small strain shear modulus of a calcareous sand was investigated by conducting bender element tests on both horizontal and vertical planes. The effects of sample preparation method, stress path and stress history on the developing of void ratio, the parameters in the modified Hardin equation and the stiffness anisotropy w...
Article
Full-text available
The failure of biocemented sand can be attributed to the breakage of biocement 23 and the exfoliation of precipitates from sand surfaces. Therefore, optimizing the mechanical 24 properties of the biocement is one of the methods to improve the performance of MICP for 25 stabilizing sand. Besides, a deep understanding of the properties of biocement i...
Article
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Biocement based on a Microbially Induced Calcite Precipitation (MICP) process has emerged to be a promising alternative to cement for soil improvement. A two-phase injection method is commonly used for the MICP treatment of granular soil. However, the samples treated using this method may not be uniform. Recently, an acidified one-phase-low-pH inje...
Article
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The cavity expansion approach has been a popular tool to interpret a wide range of geotechnical problems over the last several decades. Most previous research focused on the expansion of cylindrical and/or spherical cavities, whereas nonstandard cavities have received much less attention. To address this shortcoming, this paper presents a general t...
Article
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Soil properties, the chemical composition of cementation solution, injection technique, and environmental conditions have all been extensively studied as variables influencing MICP performance. However, despite the fact that different researchers used different bacterial suspensions, the influence of bacterial suspension type, more specifically som...
Article
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In this paper, a simplified two-stage analysis method is introduced to predict the lateral response of the existing X-section Cast-in-place Concrete (XCC) pile caused by adjacent XCC pile installation. Firstly, the large deformation finite element method, namely the Coupled Eulerian–Lagrangian (CEL) numerical technique, is employed to simulate the...
Article
Full-text available
The basal heave stability of the excavation and support system is a major concern to geotechnical design engineers, particularly in soft clay deposits. Conventional methods for estimating the basal heave stability of braced excavations generally do not consider the anisotropy of the soft clay, which may lead to the incorrect assessment of excavatio...
Article
Microbially induced carbonate precipitates (MICPs) through ureolysis-driven calcite precipitation have been investigated as a mean of improving the mechanical properties of soil (cohesion, friction, stiffness, and permeability). To achieve a well-controlled and uniform MICP, it is crucial to obtain a homogeneous distribution of bacterial activity....
Article
Full-text available
Microbially induced carbonate precipitates (MICPs) through ureolysis-driven calcite precipitation have been investigated as a mean of improving the mechanical properties of soil (cohesion, friction, stiffness, and permeability). To achieve a well-controlled and uniform MICP, it is crucial to obtain a homogeneous distribution of bacterial activity....
Article
Full-text available
Particle geometry is a result of natural processes, such as the genesis of parent rock, particle transportation and depositional history. For granular materials, the particle morphology has a significant effect on its crushing strength in geotechnical engineering. The particle morphological parameters, sphericity, aspect ratio and convexity can be...
Article
This paper introduces a preparation method of a transparent soil-rock mixture (T-SRM) for geotechnical laboratory modeling. The T-SRM uses n-dodecane and white oil as the fluid phase, amorphous silica powder as the soil phase, and quartz glass particle as the rock block phase. The T-SRM sample prepared using the proposed method is of good transpare...
Article
This paper presents a methodology to construct a water pond in sand using bioslurry layer via the microbially induced car-bonate precipitation (MICP) process. Bioslurry is calcium carbonate crystals containing high-urease active bacteria cells, allowing further microbially induced calcium carbonate precipitation when introducing cementation solutio...
Article
Full-text available
The cover image is based on the Research Article A semi‐analytical solution for displacement‐controlled elliptical cavity expansion in undrained MCC soil by Hang Zhou et al., https://doi.org/10.1002/nag.3302.
Article
Biocement is an emerging construction material via the microbially induced calcite precipitation (MICP) process for soil improvement, which could be produced using waste materials at ambient temperature. This paper investigates the possibility to produce sustainable biocement using industrial waste carbide sludge and urine. Urine was used as the gr...
Article
This book presents basic design theories and principles and provides detailed analysis for excavation failure cases based on the author's research experience, aiming to provide a comprehensive picture of the subject matter. It focuses on the basal heave stability analysis, the apparent earth pressure as well as the strut force determination, the re...
Article
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With the advent of big data era, deep learning (DL) has become an essential research subject in the field of artificial intelligence (AI). DL algorithms are characterized with powerful feature learning and expression capabilities compared with the traditional machine learning (ML) methods, which attracts worldwide researchers from different fields...
Article
Hydronic heating systems with geothermal heat exchangers are one of the innovative methods for bridge deck deicing in winter, which avoids infrastructure corrosion and environmental pollution caused by chemical methods. This paper focused on field tests on the temperature process of a bridge deck with a hydronic heating system to predict the heat e...
Article
The pile responses induced by adjacent tunnel excavation have been a hot research topic in geotechnical engineering. Tunnel excavation may exert disturbance to the surrounding soil mass and then influence the adjacent pile foundations. In this paper, the random finite difference analysis considering the spatial variations of soil properties is cond...
Article
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A homogeneous microfluidic chip was used to investigate the pore-scale characteristics during the process of microbially induced calcium carbonate precipitation (MICP). An image-processing scheme was developed to measure the projecting areas of the precipitated calcium carbonate. Calcium carbonate first precipitated on the bacterium side before spr...
Article
This study presents a field test to investigate the thermal injection performance of a full-scale energy pile for underground solar energy storage (USES). The tested energy comprises a full-scale bridge pile foundation and a spiral-shaped pipe. Numerical modeling was carried out to provide complementary results. Sensitivity analyses of the pipe con...
Article
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Various undrained cavity expansion solutions for elastic–plastic soil have been proposed previously. However, no solution has been presented for elastic–viscoplastic (EVP) soil until now. This paper presents a general solution method for solving the classical one-dimensional (1D) boundary value problem (BVP) for undrained cylindrical or spherical c...
Article
Full-text available
微生物诱导碳酸钙沉淀 MICP)是一种利用环境友好的微生物加固岩土体的新方法 。 试验结果表明, MICP加 固砂的刚度,强度和剪胀性增强,可压缩性降低。 针对 MICP加固 砂土的力学特性和变形特征,在临界状态土力学理论框架下,采用非关联流动法则,建立了 微生物加固 砂土的状态相关 弹塑性 本构模型。 在新的胶结退化准则中,将胶结退化速率与塑性应变的累积和固结围压建立关系。 微生物加固 砂土 三轴 排水剪切 试验 的模拟 结果 表明 所建立的本构 模型可以较 好 地 描述 微生物 加固砂土 的 应力 -应变关系和剪胀行为,验证了模型的合理性。
Article
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The thermal conductivity of soil is a fundamental physical property related to heat conduction and also one of the widely applied parameters in geotechnical engineering. Thermal needle tests were performed to measure the thermal conductivity of transparent sand. The thermal conductivity of three particle sizes of transparent sand was measured at di...
Article
Seismic responses of utility tunnel-soil system were studied via shaking table model tests with considerations of two kinds of double box utility tunnels: with and without joint connections. These two testing utility tunnel models were made of galvanized iron wire and micro-concrete, and the ground was simulated by the dry standard sand through lay...
Chapter
Failures or collapses of excavations are disastrous at excavation sites. At worst, they endanger the safety of workers and the adjacent properties. Their influential zones are usually so large that significant ground settlement may be introduced and adjacent properties within the influential zones of settlement may be damaged at different extents....
Chapter
Problems of deep excavation, either stability analysis, stress analysis, or deformation analysis, entail the distribution of earth pressures. Though introductory books on soil mechanics or foundation engineering have discussed quite a few earth pressure theories along with many examples, systematic research is deficient. Some important points may n...
Chapter
In a dense, built-up environment, damage to buildings and utilities may occur because of excessive ground movement arising from excavation activities nearby. Consequently, in Singapore, for deep excavation projects, stiff diaphragm walls and bored pile walls with multiple strut levels are commonly used to minimize lateral wall movement and ground s...
Chapter
The excavation process causes unloading in the surrounding soil and ground settlement. Unfavorable ground movements result in detrimental effects on adjacent infrastructures, such as buildings, pipelines, roads, bridges, and tunnels.
Chapter
One of the key concerns in constructing an underground facility within a built-up environment is the impact of the associated ground movements on adjacent buildings [1]. For excavations in ground that comprises of thick soft clays overlying stiff clay, braced walls are usually used to minimize ground movements.
Chapter
The excavation sides are normally supported by concrete diaphragm walls or secant bored pile walls with two or more levels of struts. The purpose of the excavation support system is to provide rigid lateral support for soil surrounding excavation and to limit the movement of surrounding soils.
Chapter
In recent years, excavation accidents have occurred continuously and many accidents have occurred in cities in China such as Shanghai, Guangzhou, Hangzhou, and Taipei. These accidents include the collapse of foundation pits, water seepage, ground surface settlement, tilting of adjacent buildings, leaking of nearby water or gas pipes, and even explo...
Chapter
Excessive lateral deformation of supporting wall system can result in excessive ground settlement and subsequent damage to adjacent infrastructures. Above the final excavation level, the lateral struts/props can be used to control and restrain the wall deflection and ground movement. However, for deep excavations in soft clay, due to the lack of re...
Chapter
The soil parameters used for analysis by numerical methods are not necessarily the “true” values of these parameters, since such data obtained are estimated based on limited field tests, laboratory data, or local experience, generally involving considerable uncertainty. In addition, the wall and ground responses in a supported excavation may also b...
Chapter
In the past, with shallower excavations, the influence of excavation on the surrounding environment was not so significant. Recently, with increase of excavation depth and scale in urban areas, the magnitude and extent of ground settlement increases, which frequently damages the adjacent buildings and infrastructures. This chapter contains studies...
Article
Electrolysis desaturation is a novel method to improve the liquefaction resistance of liquefiable foundations. The microscopic mechanism of the horizontal-layered electrolysis desaturation of calcareous sand specimens was revealed using low field nuclear magnetic resonance (1H L-F NMR) apparatus. The expansion and recovery of sand pores was detecte...
Article
Full-text available
Small strain shear modulus is an important parameter indicating soil stiffness in geotechnical engineering. In this study, multidirectional bender element technique was used to investigate the small strain shear modulus of a calcareous sand from Persian Gulf. The effect of the coefficient of gradation, mean particle size and stress history on GHH,...
Article
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To effectively stabilize coarse sand, bentonite was introduced in microbially induced 3 carbonate precipitation (MICP) grouting. Varying concentrations (0 g/L, 20 g/L, 40 g/L and 80 4 g/L) of bentonite were added to bacterial suspensions (BSs), which were magnetically stirred 5 to form bacterial-bentonite suspensions (BBSs). Then, coarse sand speci...
Chapter
The dilatancy and stress-strain relationship of rockfill materials often depend on their material states. To better simulate the strength and deformation behaviors of rockfill materials under complex stress states, the state void-ratio index was incorporated into Rowe’s stress-dilatancy equation, bounding stress ratio, and plastic modulus. A state-...
Article
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Snake can perfectly utilize its scales to move. Inspired by the snake scales, this study investigated the characteristics of the snake skin-inspired pile penetration process. Six kinds of pile shaft inspired by snakeskin and one normal pile as reference were designed. In order to investigate the influence of scale layouts on the pile and particle r...
Article
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One-dimensional compression tests on quartz sands treated by microbially induced carbonate precipitation (MICP) were carried out to evaluate the effects of gradation and calcium carbonate (CaCO3) content on compression behaviors. The experimental results reveal that the compressibility of specimens increases with increasing coefficient of uniformit...
Article
Full-text available
Microbially induced carbonate precipitation (MICP) has been actively investigated as a promising method to improve soil properties. A burning issue impeding its wide application is the severe spatial inhomogeneity of the CaCO3 distribution. Inspiring by the temperature sensitivity of the bacteria activity, a temperature-controlled one-phase MICP me...
Article
In order to study the dynamic response of ballastless track X-section cast-in-place concrete (XCC) pile-raft foundations under different axle loads, this article presents an experimental study focusing on the dynamical soil stresses and velocity response of a ballastless track XCC pile-raft foundation under vertical cyclic loading. It was found tha...
Article
Progressive and standing waves can produce instability of the seabed and seabed-supported marine structures. In this paper, the stress paths induced by standing waves were deduced to provide a theoretical basis for laboratory element tests to establish the cyclic behavior of marine sediments, which can serve to improve the understanding of seabed l...
Article
Particle breakage is a typical characteristic of crushable granular soil under high pressure, which has great effects on its stress-strain behaviors. The phenomenon of the critical state line (CSL) shifting downward in the compression plane caused by particle breakage was depicted by a breakage-dependent critical state plane (BCSP). Particle breaka...
Article
Full-text available
This paper presents a new microbial technique for soil improvement through microbially induced carbonate precipitation (MICP) incorporating with reactive magnesia cement (RMC). Through a microbially induced carbonate precipitation (MICP) process, hydrated magnesium carbonates (HMCs) are produced due to biological carbonation of hydrated RMC, which...
Article
Microbially induced calcite precipitation (MICP) is used for bio-cementation of calcareous sand using microbial metabolism to generated calcite precipitation. This technology has been proposed for sealing damage in geological reservoirs, repair of cracks in stone buildings, and strengthening of foundations in coastal engineering. To test the stabil...
Article
This study investigates the thermo-mechanical behavior of energy piles equipped with a spiral pipe configuration. The analysis is based on the results of a full-scale energy pile as well as 3-D thermo-mechanical finite element analyses. The thermo-mechanical behavior of two energy piles with five U-shaped pipes connected in series and parallel, cha...
Chapter
To explore the difference between the critical state lines (CSL) of crushable and uncrushable sand with the same gradation as crushable sand at the critical state, two sets of DEM simulations are conducted with different confining pressure. A series of Large-scale triaxial compression test were carried out on rockfill material as the basis for cali...