2020 Vol. 34, No. 5

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Technology Development and Exploration
Foundation Treatment Technology of Airfield in Shallow Karst Cavity
Wang Shuhua, Zhang Peng, Zhou Zhizhao, Shi Tianqi
2020, 34(5): 249-253,259. doi: 10.3969/j.issn.1007-2993.2020.05.001
[Abstract](93) [PDF 1322KB](22)
Abstract:
Based on the project of shallow karst cavity in Chenzhou Airport, Hunan Province, the effects of dynamic compaction of cushion and replacement pier of dynamic compaction on the treatment of shallow karst cavity are analyzed. Under the ramming energy of 4000 kN, the law of soil deformation and the ch...
Application of Prestressed Fish-bellied Beam Steel Support in Deep Foundation Pit Enclosure
Du Changchun, Du Zhiguo, Guo An
2020, 34(5): 254-259. doi: 10.3969/j.issn.1007-2993.2020.05.002
[Abstract](139) [PDF 3679KB](30) [Cited by] (16)
Abstract:
Support of prefabricated prestressed fish-bellied beam based on the prestressing principle is a new advanced environmental friendly internal support structure system of deep foundation pit. Two application examples of this steel structure support system in deep foundation pit in soft soil are introd...
Application of Laser Scanning Combined with 3D Printing in the Protection and Restoration of Cultural Relics
Zhang Yong, Wang Changke, Yuan Ruihong
2020, 34(5): 260-262,267. doi: 10.3969/j.issn.1007-2993.2020.05.003
[Abstract](182) [PDF 1982KB](23) [Cited by] (9)
Abstract:
Laser scanning and 3D printing could be used in the protection and restoration of cultural relics. Considering the limitations of the traditional digital methods of cultural relics, the non-contact and rapid acquisition of massive target surface data by laser scanning has outstanding advantages. Tak...
Application of BIM in Foundation Pit Engineering for Mountainous City
Li Junxin, Yang Xun, Gao Hong, Xu Gang, Wei Lai
2020, 34(5): 263-267. doi: 10.3969/j.issn.1007-2993.2020.05.004
[Abstract](98) [PDF 2847KB](26) [Cited by] (10)
Abstract:
A foundation pit in typical geological condition in mountainous area of Chongqing is analysed as an example. Key points of BIM application in the project is analysed and a three-dimensional modelling flow of foundation pit engineering is proposed. A three-dimensional geology-design coupling model of...
Deformation Control Measures of Underground Tunnel under the Tunneling of Large Section and Straight Wall
Li He, Li Fei, Li Yuzhu
2020, 34(5): 268-272. doi: 10.3969/j.issn.1007-2993.2020.05.005
[Abstract](84) [PDF 2950KB](14) [Cited by] (3)
Abstract:
Limited by the shape of the excavation which cannot form an effective arch, there are extremely high requirements for deformation control during the tunneling of large section flat-top straight wall section tunnel. Through the Wukesong underground parking garage-underpass-intermediate pedestrian pas...
Application of CFG Pile in Non-self-weight Collapsible Loess Stratum
Sun Jinlong
2020, 34(5): 273-275. doi: 10.3969/j.issn.1007-2993.2020.05.006
[Abstract](143) [PDF 1259KB](33) [Cited by] (8)
Abstract:
Taking Hongxiangmeiyu foundation treatment project in Xiahuayuan District of Zhangjiakou as an example, combined with the technical principle of CFG pile composite foundation, the characteristics of non-self-weight collapsible loess bearing load before reaching the initial collapsible pressure are f...
Karst Investigation and the Countermeasures in Xinjie Tunnel of the Kaili Ring Highway, Guizhou Province
Wang Jian, Wang Lijun, Ma Jianxin, He Xin
2020, 34(5): 276-281,285. doi: 10.3969/j.issn.1007-2993.2020.05.007
[Abstract](152) [PDF 8477KB](22) [Cited by] (4)
Abstract:
It is prone to encountering water inflow in karst tunnels. To avoid water inflow incidents in the construction of karst tunnel, field geological investigation was adopted to investigate the karst geology conditions in Xinjie tunnel of Kaili ring highway in Guizhou Province. It indicated that karst w...
Application of QR Code Technology in Underground Pipeline Marking
Yin Yanyun, Li Shifeng, Chen Zhen, Du Wenxiao
2020, 34(5): 282-285. doi: 10.3969/j.issn.1007-2993.2020.05.008
[Abstract](91) [PDF 1599KB](15) [Cited by] (4)
Abstract:
The traditional information acquisition from underground pipelines has the disadvantages of high cost, low efficiency and potential safety hazards. The technology of information sharing and acquisition based on QR code technology provides a new solution for the management, operation and social shari...
Experimental Research
Permeability Characteristics and Foundation Pit Precipitation Measures of Coral Reef Limestone
Zheng Jianguo, Qiao Jianwei, Tang Guoyi
2020, 34(5): 286-289. doi: 10.3969/j.issn.1007-2993.2020.05.009
[Abstract](98) [PDF 3198KB](14) [Cited by] (3)
Abstract:
The structure characteristics and permeability characteristics of coral reef limestone in East Java, Indonesia were analyzed by engineering geological drilling and water pressure test in borehole. And the foundation pit precipitation measures in coral reef limestone area were studied by field test. ...
Mechanical Properties by Frozen-thaw of Seasonal Frozen Soil in Changchun Area
Guo Hongmei
2020, 34(5): 290-295. doi: 10.3969/j.issn.1007-2993.2020.05.010
[Abstract](72) [PDF 2987KB](19) [Cited by] (4)
Abstract:
The change of soil mechanical parameters of seasonal frozen soil under freezing and thawing cycles in Changchun area is studied. Soil samples were taken from typical soil layers and tested in the laboratory. The physical and mechanical parameters of soil samples under three different conditions, nam...
Dynamic Characteristics of Deep Old Cohesive Soil under the Influence of Traffic Load
Zhang Shuxuan, Chen Liwei, Yang Weimin, Si Haibao
2020, 34(5): 296-302,311. doi: 10.3969/j.issn.1007-2993.2020.05.011
[Abstract](66) [PDF 2256KB](17)
Abstract:
When Beijing-Zhangjiakou high-speed railway pass through the Guanting area, under the long-term traffic cyclic dynamic loading, the deep old cohesive soil will be deformed, which may affect the safety of high-speed railway operation. Focusing on this problem, GDS dynamic triaxial apparatus was used ...
Particle Breakage and Meso-scopic Mechanism of Gravelly Soil by Dynamic Compaction Treatment
Fu Le, Cong Xiaoming, Li Gang, Qiu Jun
2020, 34(5): 303-307. doi: 10.3969/j.issn.1007-2993.2020.05.012
[Abstract](78) [PDF 4846KB](13) [Cited by] (2)
Abstract:
Gravelly soil is widely used as backfill materials in sea reclamation and valley filling. Dynamic compaction is a priority method to treat gravelly soil foundation. It is important to study the fracture mechanism of gravelly soil under dynamic compaction. In the research, the relative particle break...
Experimental on Compaction Test of the Recycled Aggregate Mixture with Different Particle Size
Chen Jiankang, Jiao Weigang, Yang Yi
2020, 34(5): 308-311. doi: 10.3969/j.issn.1007-2993.2020.05.013
[Abstract](66) [PDF 1741KB](8) [Cited by] (1)
Abstract:
Compaction test of the recycled aggregate mixture with different particle size was conducted, and the influence factors of the optimum moisture content (wopt) and the maximum dry density (ρmax) were analyzed. Considering such three effective factors including aggregate amount, cement amount and fly ...

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