Positioning design of horizontal drain in sandwiched clay-drain systems for land reclamation

Feng, Jianxue; Ni, Pengpeng; Zheng, Chen; Mei, Guoxiong; Xu, Meijuan

doi:10.1016/j.compgeo.2020.103777

Cited by 8 publications

(3 citation statements)

References 43 publications

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“…Cross section of soil loading (Holtz, 1987) Prefabricated Horizontal Drain (PHD) is starting to be commonly used as an instrument to accelerate the soil compaction process which is faster than the use of Preloading and Vertical Drain (Feng, J., Ni P., Chen Z., Mei G., 2020). This horizontal drain actually replaces the function of sand (sand blanket) with an installation pattern of 1 PVD: 1 PHD so as to avoid bending the PVD tape.…”

Section: Figurementioning

confidence: 99%

Analysis of Soil Subscription on Soil Lack Combination of PVD and PHD With Analytical and Numerical Methods Using 3D Plaxis in STA 103 + 550 Construction of High Click Toll Road Range, Stage 1

Sagala

2022

IJSSR

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The construction of transportation facilities on soft soil will cause problems where the bearing capacity of soft soil is low and the process of land subsidence will require a long period of time. As is known, the land subsidence factor causes many problems in the process of building transportation facilities, besides that, there will also be problems at the level of service (serviceability). Therefore, this problem must be anticipated before the transportation facility begins to function. There are many methods that can be done. Where in the selection of methods, the efficiency and effectiveness factors are very dominant. One method that can be done is to fill the soil combined with vertical drain and horizontal drain. This method was chosen to be one of the most widely used methods because it is easy to do and quite efficient. The purpose of writing this thesis is to analyze thereduction of settlement each layer of soft soil that is repaired using the soil filling method combined with prefabricated vertical drain and prefabricated horizontal drain using the PLAXIS 3D program. The results of this calculation will then be compared with observations made in the field using a settlement plate for later analysis. Calculation of the size of the consolidation settlement using the Terzaghi 1 dimension consolidation method obtained a decrease of 16.09 cm. This result is relatively close to the results of observations made in the field of 16.3 cm. In the PLAXIS 3D modeling approach using 1 PVD line and 1 PHD line, the result is a decrease of 16.52 cm without taking into account the effect of the smear zone and 16.22 cm taking into account the effect of the smear zone. In the PLAXIS 3D modeling approach using 2 PVD lines and 2 PHD lines, the result is a decrease of 16.54 cm without taking into account the effect of the smear zone and 16.28 cm by taking into account the effect of the smear zone. And when modeling without using PHD the value of the decrease obtained is 9.7 cm. When modeling using sand blanket as a substitute for PHD, the decrease value is 13.3 cm

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Section: Figurementioning

confidence: 99%

Analysis of Soil Subscription on Soil Lack Combination of PVD and PHD With Analytical and Numerical Methods Using 3D Plaxis in STA 103 + 550 Construction of High Click Toll Road Range, Stage 1

Sagala

2022

IJSSR

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“…Analyzing the works of domestic and foreign scientists, it has been noted that most of them are devoted to the general development of land reclamation and water management in the leading countries of the world or in Ukraine. They investigated the current state of water reclamation systems and the possibility of their reconstruction in order to make functional improvements (Shi et al, 2018); thermodynamic balancing of heat and mass transfer processes in drainage and humidification systems (Elzayeda et al, 2020); integration of reclamation works into balanced land management (Leucuta et al, 2016); restrictions and trade-offs related to the reclamation of abandoned sown areas in order to assess potential crops in Ukraine and Kazakhstan (Meyfroidt et al, 2016); the causes of the decline of most reclamation systems and suggested ways to update and improve their condition (Krolikowska et al, 2009); ways to optimize the design of horizontal drainage in reclaimed clay-sandy layered soils (Feng et al, 2020); ways to optimize reclamation systems of water circulation type in order to reduce the negative impact of wastewater on the environment (Rezaei et al, 2019); prospects for land reclamation development in Ukraine (Baliuk, 2018); current state of irrigation and drainage in Ukraine, ways of reconstruction and restoration (Dekhtiar, 2019); land reclamation and optimization of soil processes (Lozovitstyi, 2014); development of land reclamation and water management of Ukraine according to world trends (Kovalenko, 2009); problems of reforming the agricultural sector of the economy and unbundling of reclaimed lands, which led to a violation of the integrity of reclamation systems (Dmytrenko, 2011); drainage and irrigation systems on the territory of Ukraine and stages of their creation (Kyryliuk & Lebedovskyi, 2020). However, only a few scientists focus on studying the problems of development of regional reclamation systems, in particular irrigation (Yatsenko, 2014).…”

Section: Introductionmentioning

confidence: 99%

Regional reclamation landscape technical systems: current status and rational use

Denysyk¹,

Mizina²

2021

Journ. Geol., Geogr., and Geoec..

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The problems of the current state of possibilities of reconstruction and rational use of regional reclamation landscape technical systems have been considered. It has been noted that for studying the process of their formation and modern functioning GIS-method (GIS-packages SAS.Planet.Release and GoogleEarthPro) were used in addition to field landscape research. The meaning of the concept of “reclamation landscape technical system” as a structure in which interconnected hydraulic structures and water bodies that are necessary to ensure and maintain the optimal operation mode of the reclamation landscape complex has been clarified. The main types of reclamation such as hydraulic, cultural, chemical, agrotechnical and agroforestrytechnical have been partially discribed. The essence of the concept of “hydraulic reclamation” as a set of measures aimed at improving the water- air (waterlogging and dehydration) regime of soils has been considered more detailed. The expediency of resumption of reclamation measures in the territory of Ukraine has been confirmed, as 2/3 of its area is in conditions of unfavorable water regime. This study is focused on the analysis of drainage and humidification systems as the most effective in ensuring the regulation of excessive moisture or its deficit. It has been shown that the peak of reclamation works and construction of reclamation landscape technical systems was observed 1950–1965. The largest irrigation, drainage, polder and drainage-humidification systems in Ukraine have been discribed. It has been found that the decline of reclamation systems began in 1991 and was characterized by a reduction in the area of irrigated and drained lands and the deterioration of their ecological condition. Emphasis has been placed on the study of regional drainage and humidification systems and three stages of their development in Ukraine have been identified. Possible measures for the rational use of reclamation systems on the example of the Trubizh regional drainage and humidification landscape technical system have been proposed. It has been noted that the development of regional plans for the rational use of this system should be based on the analysis of the history of economic development of the Trubizh river basin and taking into account the specifics of the landscape structure of the canal-floodplain type. Reconstruction of the reclamation system has been recommended to conduct in two stages: the first one is based on the modernization of hydraulic structures and the main canal, the second one is based on the internal and landscape structure of the system. The feasibility of partial restructuring of the open network for closed drainage and the creation of temporary drainage channels has been confirmed, which will allow more rational use of resources of the Trubizh reclamation landscape technical system.

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“…Two-soil-layer deposits are sometimes encountered in projects involved in engineering geology or geotechnical engineering, such as foundation construction and hydraulic dredger filling (Roy and Deb 2019;Zou et al 2019;Ni et al 2019;Feng et al 2019Feng et al , 2020. Proper design of a geotechnical project involving any soft deposit is essential and generally implemented upon evaluating the consolidation rate of the system (Suzuki and Yasuhara 2004;Ye et al 2012;Yin and Feng 2016;Deb and Behera 2017;Xu et al 2019;Ni et al 2019).…”

Section: Introductionmentioning

confidence: 99%

A novel semianalytical method for evaluating the average consolidation degree of a two-soil-layer deposit

Zhou

2021

Bull Eng Geol Environ

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Two-soil-layer deposits are sometimes encountered in engineering practice. To accurately assess the consolidation condition of a two-soil-layer deposit, it is necessary to fairly estimate both the settlement-and excess pore water pressure-defined average degrees of consolidation of the system. In this study, the consolidation behavior of a two-soil-layer deposit is first experimentally and numerically investigated, and the results show that the average degree of consolidation defined by the excess pore water pressure (ADCu) is generally less than that defined by the settlement (ADCs), and the difference can be distinct when a softer and less permeable layer is located adjacent to the drainage boundary. A new index (β) denoting the permeability reduction in the soil layer adjacent to the drainage boundary is introduced to indirectly quantify the difference between the ADCu and ADCs. The β value is quantitatively correlated to the permeability, compressibility, soil layer thickness, and loading condition of a two-soil-layer deposit, and a simple method with general application procedures is finally proposed to evaluate the ADCu of a two-soil-layer deposit by modifying a theory that was originally developed to predict the ADCs. Application of the proposed method to another two consolidation tests of two-soil-layer deposits demonstrates that the method has satisfactory validity. KeywordsConsolidation • Two-soil-layer deposit • Permeability • Laboratory test • Finite element analysis Notations C c Compression index C k Rate of permeability change with void ratio c' Effective cohesion c v Coefficient of vertical consolidation c v1 Coefficient of vertical consolidation of soil layer 1 c v2 Coefficient of vertical consolidation of soil layer 2 e Void ratio e 0 Initial void ratio * Fang Xu

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Positioning design of horizontal drain in sandwiched clay-drain systems for land reclamation

Cited by 8 publications

References 43 publications

Analysis of Soil Subscription on Soil Lack Combination of PVD and PHD With Analytical and Numerical Methods Using 3D Plaxis in STA 103 + 550 Construction of High Click Toll Road Range, Stage 1

Analysis of Soil Subscription on Soil Lack Combination of PVD and PHD With Analytical and Numerical Methods Using 3D Plaxis in STA 103 + 550 Construction of High Click Toll Road Range, Stage 1

Regional reclamation landscape technical systems: current status and rational use

A novel semianalytical method for evaluating the average consolidation degree of a two-soil-layer deposit

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