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Foundation settlement observation method

A technology for foundation settlement and settlement observation, which is applied in measuring devices, surveying and navigation, height/horizontal measurement, etc., can solve the problem of accurately grasping the law of foundation deformation and accurately predicting post-construction settlement and differences in physical and mechanical properties of filling soil Larger, significant changes in particle gradation, etc., to achieve the effect of saving investment, simple and intuitive operation, and verification of rationality

Inactive Publication Date: 2016-10-12
CENT SOUTH UNIV +1
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Problems solved by technology

[0003] The purpose of the present invention is to provide a foundation settlement observation method, aiming to solve the problems of mixed filling types, significant particle gradation changes, large differences in physical and mechanical properties of filling soil, high filling height, and thick base covering soil layer. Ballast bed, it is difficult to accurately grasp the law of foundation deformation and accurately predict the post-construction settlement of the foundation when using the existing observation method of foundation settlement

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Embodiment 1

[0020] The plant railway of PetroChina Yunnan Petrochemical Railway Special Line is located about 1km south of Caopu Town, Anning City, Yunnan Province, and about 10km east of the main urban area of ​​Anning City. The site belongs to the hilly area cut by tectonic erosion and dissolution in the Central Yunnan Plateau, and is dominated by middle and low mountains. The topography of the site has large undulations, the original ground elevation is 1884m-1937m, and the relative height difference is about 53m.

[0021] At present, the overall track bed area of ​​the railway in the factory area has been filled simultaneously during the leveling of the refinery site. The elevation of the field surface is about 1901m, and the elevation from the designed rail top is 2-3m. The padding is filled with the excavated muck excavated for leveling the site, which is composed of fully weathered bedrock and residual and slope accumulation soil, mixed with crushed stones, and has not been layered...

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Abstract

The invention discloses a foundation settlement observation method. The foundation settlement observation method is characterized by observing the whole ballast bed region by adopting a mode that a stack loading mode is combined with a settlement observation plate and a multi-point displacement meter; an embedding method of the multi-point displacement meter comprises the following steps: drilling and embedding after carrying out accurate survey setting out in a survey point position; placing a PVC (Polyvinyl Chloride) pipe, a PVC joint and a single-point settlement unit in the opening of a hole in sequence according to an installation sequence, and threading a pulling rope; installing the PVC pipe, the PVC joint and the single-point settlement unit through which the pulling rope is threaded in the hole in sequence, and firmly connecting by using screws. According to the foundation settlement observation method disclosed by the invention, the whole ballast bed region is observed by adopting a mode that the stack loading mode is combined with the settlement observation plate and the multi-point displacement meter, curve-fitting prediction post-construction settlement is carried out according to an earth filling height-time-settlement volume curve graph, the settlement volumes of different earth filling regions can be determined, the observation is accurate, the foundation settlement observation method is used for guiding the design and the construction, so that reasonable engineering measures are ensured, and the investment is economical.

Description

technical field [0001] The invention belongs to the field of engineering exploration or ground treatment, and in particular relates to a ground settlement observation method. Background technique [0002] If the layered rolling construction process is not adopted for the filling of the integral track bed of the railway, the filling types are mixed, the physical and mechanical properties of the filling soil are quite different, and the filling height is large, the base covering soil layer is thick, and the filling deformation is relatively large. It is large and uneven, and only theoretical analysis and engineering experience are used for design, which has a large potential safety hazard and has a huge impact on project construction decisions and investment. Contents of the invention [0003] The purpose of the present invention is to provide a foundation settlement observation method, aiming to solve the problems of mixed filling types, significant particle gradation chang...

Claims

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Application Information

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IPC IPC(8): G01C5/00
CPCG01C5/00
Inventor 王晅孙希望成浩张标杨果岳赵利奎
Owner CENT SOUTH UNIV
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