Vol. 6 No. 1 (2023)

Open Access

Articles

Article ID: 330

Application and Research of Soil Mixing Wall

by Runjie Gu

Insight - Civil Engineering, Vol.6, No.1, 2023; 1187 Views, 104 PDF Downloads

Soil Mixing Wall can meet the needs of foundation pit support structures in various projects. Compared with other supporting structures, it has the advantages of good permeability resistance, short construction period, and less impact on the surrounding environment. It is a foundation pit supporting structure with great development potential [1] .

Open Access

Articles

Article ID: 333

Research on the Overall and Local Mechanical Behaviors of Steel Box Girder Cable-Stayed Bridge via Incremental Launching Construction

by Piyun Zhang, Xinwen Jiang, Huilian Gan

Insight - Civil Engineering, Vol.6, No.1, 2023; 1057 Views, 104 PDF Downloads

In this paper, a large-span cable-stayed bridge with double pylons and double cable planes is employed to study the overall and local mechanical behaviors. The steel box girder bridge is constructed by incremental launching with the maximum span of 50 m. Through the overall stress analysis, the most unfavorable stress position of the structure in the incremental launching construction is identified; the refined local stress analysis is carried out for the girder section at this position, and the local stress characteristics of the structure are studied. The mechanical performance and the applicability of incremental launching are determined by comparing four kinds of elastic cushion. This paper aims at improving the safety of incremental launching construction of steel box girder bridge, and can provide reference for similar projects.

Open Access

Articles

Article ID: 354

Research on the Quality Control of Civil Engineering of High-Rise Buildings

by Deqiang Liao

Insight - Civil Engineering, Vol.6, No.1, 2023; 615 Views, 99 PDF Downloads

With the rapid development of economy in China, building technology has been improved and innovated in recent years. Urban development cannot be separated from buildings. However, China’s land resources are limited and cannot meet the increasing housing needs. More and more real estate companies have shifted their investment focus to high-rise building projects, which are more complex and require a lot of building materials than lower-rise building projects. In recent years, with the optimization and upgrading of technology, the requirements of high-rise buildings are getting higher and higher, and the technical operation is becoming more and more difficult. In this case, appropriate methods must be taken to control the technical quality of civil engineering.

Open Access

Articles

Article ID: 355

Discussion on Construction Technology of Road Subgrade in Civil Engineering

by De Zhang

Insight - Civil Engineering, Vol.6, No.1, 2023; 1148 Views, 93 PDF Downloads

With the rapid development of cities, more and more new roads are built in various civil engineering projects. Subgrade construction is the core of road engineering system. Only by comprehensively ensuring the quality of road subgrade can the road performance be effectively improve and the development of urban construction be ensured. The quality of subgrade determines the traffic capacity of urban roads and plays a decisive role in the safety and stability of traffic. This article mainly analyzes the problems of road subgrade construction in civil engineering, and comprehensively puts forward countermeasures, so as to effectively improve the subgrade construction quality and ensure the smooth operation of roads.

Open Access

Articles

Article ID: 356

Analysis on Energy-Saving and Green Technology and Optimization Measures in Civil Engineering Construction

by Delin Qi

Insight - Civil Engineering, Vol.6, No.1, 2023; 1424 Views, 85 PDF Downloads

Energy-saving and green technology plays an important role in the development of civil engineering in the new era. The concept of energy saving and environmental protection can not only ensure the coordination between civil engineering construction and urban living environment, but also reduce construction cost and avoid energy consumption. This article analyzes the common problems in the construction of civil engineering, and discusses the application of energy-saving and green technology in civil engineering. Corresponding measures are also put forward to promote the energy-saving and green technology, as well as the sustainable development of the construction industry.

Open Access

Articles

Article ID: 617

Structural response of reinforced LECA aggregate concrete slabs subjected to high temperatures

by Fadya S. Klak, Muyasser M. Jomaa'h

Insight - Civil Engineering, Vol.6, No.1, 2023; 277 Views, 46 PDF Downloads

This work reports tests conducted on nine one-way reinforced concrete slabs using lightweight expanded clay aggregate (LECA) as a slab weight reduction technique. Every slab had the same dimensions, steel reinforcement, and the same composition of concrete. The slabs were heated from their bottom faces through a fire chamber and subjected to a sustained line load. The specimens’ fire resistance performance and mechanical characteristics were evaluated after they had undergone the same testing conditions. The study parameters were the replacement of coarse aggregate with different percentages of LECA (20%, 40%), and different temperatures (400 ℃ and 700 ℃). Compared to the reinforced normal-weight concrete slab, the reinforced LECA aggregate concrete slabs’ fire resistance and flexural strength decreased by LECA. The slabs’ deflection rose as the LECA increased. The largest increase in slab deflection was 37.2%, while the most notable decrease in ultimate load capacity was roughly 35.1%. The stiffness depreciation was substantial, though, at roughly 50%. The results for LECA-reinforced aggregate slabs not exposed to high temperatures support this conclusion. Reinforced LECA aggregate slabs maintained structural integrity after fire testing.

Open Access

Articles

Article ID: 618

Study on compaction characteristics and discrete element simulation for rubber particle-loess mixed soil

by Wen-qi Kou, Jian-guang Bai, Hai-jun Li, Qing-hong Liu

Insight - Civil Engineering, Vol.6, No.1, 2023; 398 Views, 193 PDF Downloads

The rapid surge in traffic volume in China has resulted in a substantial accumulation of waste tires. By harnessing the lightweight and deformable characteristics of tire rubber particles, they are combined with soil to form rubber particle-loess mixed soil, which is progressively being embraced in civil engineering as a pivotal approach towards attaining green and sustainable development. In this study, waste tire rubber particles were integrated into loess to generate rubber particle-loess mixed soil, and compaction tests were conducted to investigate its compaction characteristics. Furthermore, PFC 3D (Particle Flow Code 3D) was utilized for simulating the bearing ratio test of rubber particle-loess mixed soil, thereby validating the feasibility of numerical simulation for calculating CBR (California bearing ratio) values and exploring the relationship between micromechanical characteristics and macroscopic characteristics of such mixtures. The findings indicate that the maximum dry density of rubber particle-loess mixed soil significantly decreases with an increasing content of rubber particles. The utilization of PFC 3D discrete element software proves efficacious in examining the bearing capacity of this mixture. Notably, when 20 mesh rubber particles constitute 20% by volume, the CBR value reaches its pinnacle and exhibits optimal bearing capacity. From a micromechanical perspective, the variation in internal porosity of rubber particle-loess mixed soil is positively associated with changes in macroscopic optimal water content, and negatively associated with changes in macroscopic CBR value. incorporating rubber particles enhances resistance against external forces while diminishing deformation within loess. This study provides a guidance for the efficient utilization of waste tires and the improvement of loess’s characteristics.

Open Access

Review

Article ID: 304

Discussion on the main points of construction quality control in civil engineering

by Xiangming Zhou

Insight - Civil Engineering, Vol.6, No.1, 2023; 997 Views, 55 PDF Downloads

With the improvement of comprehensive development level, civil engineering is perceived a promoted position in the development of the whole market economy in China. Civil engineering is an important link for building construction. Good civil engineering construction management ensures the overall engineering quality control level. Through the reasonable analysis of construction standards, construction contents and construction steps of civil engineering, the actual construction control and management methods of civil engineering are defined, the effective control scheme of civil engineering quality is analyzed, and reasonable suggestions for solving problems are put forward, so as to realize effective control and management of civil engineering construction quality in China. This paper makes an analysis of the actual construction control and fully studies the measures and schemes of the actual construction quality control to improve the management efficiency of the construction quality control of civil engineering.