Vacuum combined surcharge preloading method settlement volume measurement method

A technology of combined surcharge and measurement method, which is applied in the field of measurement of settlement by vacuum combined surcharge preloading method, can solve the problems of great difference and inability to provide accurate information, and achieve the effect of equivalent simplification

Active Publication Date: 2014-07-30
ZHUHAI ELECTRIC POWER DESIGN INST
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Problems solved by technology

However, this consolidation equation needs to use more geotechnical parameters to participate in the calculation, and in the actual engineering situation, due to the complex nature of the soil itself, the defects of geotechnical experiments and other factors, it is impossible to accurately provide the correspond

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  • Vacuum combined surcharge preloading method settlement volume measurement method
  • Vacuum combined surcharge preloading method settlement volume measurement method
  • Vacuum combined surcharge preloading method settlement volume measurement method

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Embodiment Construction

[0072] refer to figure 1 As shown, a method and process for measuring the settlement of the vacuum combined surcharge preloading method of the present invention will be described in detail in combination with a foundation treatment project example of the vacuum combined surcharge preloading method.

[0073] Vacuum joint surcharge 5 preloading method Set manhole 1 in the soft soil foundation that needs to be reinforced as a vertical drainage channel, and then lay a sand cushion layer 2 on the ground as a horizontal drainage layer, and cover it with an airtight sealing film 3 To isolate it from the atmosphere, by burying the water absorption channel in the sand cushion layer 2, use a vacuum device to pump air from the suction pipe 4, and discharge the air in the sealing film 3, so that a pressure difference is generated inside and outside the film, and this part of the pressure difference is As the load acting on the foundation, as the air in the membrane is continuously dischar...

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Abstract

The invention discloses a vacuum combined surcharge preloading method settlement volume measurement method. The consolidation coefficient C[td] of each working state time interval is obtained by each settlement volume measured value s[it] of a plurality of working state time intervals; a mathematical average value is obtained by the consolidation coefficients C[td] of all the working state time intervals, so that an equivalent consolidation coefficient C'[v] is obtained, the consolidation degree U of the foundation soil layer at any moment can be solved in the consolidation process, and finally, the consolidation degree of the foundation soil layer at any moment can be solved. The settlement volume measurement method disclosed by the invention is simple, convenient and feasible, measurement accuracy can meet project actual requirements; only basic soil engineering parameters of the foundation soil layer are required to effectively calculate the consolidation settlement volume of a vacuum combined surcharge method soil body at any moment; the measurement method can be used for accurately calculating the settlement volume of a site, a road or similar conditions, accordingly, fill quantities can be accurately estimated during preloading method construction, the measurement method has a certain guide meaning for design and construction, thus the project quality is ensured, and the time limit of the project can be reasonably estimated in advance.

Description

technical field [0001] The invention relates to the field of geotechnical engineering, in particular to a method for measuring the settlement of vacuum combined surcharge preloading method. Background technique [0002] At present, various soft soil strata are widely distributed in coastal areas and inland plains or mountainous areas of our country. Soft soil strata are characterized by high water content, high compressibility, low strength, and poor water permeability. Due to its low strength, the bearing capacity and stability of the foundation often cannot meet the engineering needs. Sites, roads or other similar filling projects on soft soil foundations often use preloading methods for foundation treatment. [0003] Vacuum combined surcharge preloading method is a combination of vacuum preloading and surcharged preloading. First, according to the process requirements of vacuum preloading, lay the film, bury the pipe, and dig the trench. When the vacuum under the film i...

Claims

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Application Information

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IPC IPC(8): E02D1/00
Inventor 戴明
Owner ZHUHAI ELECTRIC POWER DESIGN INST
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