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In-situ soil exploration device and in-situ soil exploration method

An in-situ soil and cone technology, which can be used in on-site foundation soil survey, construction, infrastructure engineering, etc., and can solve problems such as inaccurate survey results.

Inactive Publication Date: 2013-08-07
TIANJIN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0006] The present invention aims to solve the technical problem that the survey results are not accurate enough when the existing soil survey method in ocean engineering is applied to the suction foundation, and provides an in-situ soil survey device and survey method

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Embodiment Construction

[0028] In order to further understand the invention content, characteristics and effects of the present invention, the following examples are given, and detailed descriptions are as follows in conjunction with the accompanying drawings:

[0029] Such as Figure 1 to Figure 2 As shown, this embodiment discloses an in-situ soil survey device, which is mainly composed of a hollow rod 1 , a cone measuring head 2 , an earth pressure gauge 3 , a pore water pressure gauge 4 and a water pipeline 6 .

[0030] The hollow rod 1 is a hollow round rod with a closed top, usually, its length is 10m-60m, and its outer diameter is 10cm-30cm. When the survey depth exceeds the length of a single hollow rod 1, it can be extended by connecting other hollow rods 1.

[0031] A plurality of earth pressure gauges 3 and pore water pressure gauges 4 are installed on the side wall of the hollow rod 1, and every four earth pressure gauges 3 and every four pore water pressure gauges 4 are radially evenly ...

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Abstract

The invention discloses an in-situ soil exploration device and an in-situ soil exploration method. The in-situ soil exploration device comprises a hollow rod member, and the bottom end of the hollow rod member is fixedly provided with a cone probe. The hollow rod member and the side wall of the cone probe are provided with soil pressure meters and pore water pressure meters, the bottom point of the cone probe is provided with a water inlet / outlet, and the water inlet / outlet is hermetically connected with a water pipe line which penetrates outside the top end of the hollow rod member. The in-situ soil exploration method comprises firstly pressing the exploration device in soil at a certain speed and acquiring sensor data; opening a water pump, sinking the exploration device at the identical speed and acquiring the sensor data again; and computing out the sinking resistance of self-weight sinkage and suction-force sinkage respectively. According to the in-situ soil exploration device and the in-situ soil exploration method, the disturbance process that the soil bears during a suction-type foundation sinkage process is simulated, the affection of the suction-type foundation sinkage construction process on soil strength is taken into consideration, and the detected soil-end resistance and the detected side form resistance can reflect the sinkage resistance of a suction-type foundation in a special construction process more accurately.

Description

technical field [0001] The invention relates to a field survey technology of foundation soil, in particular to a device and method for surveying soil parameters in situ. Background technique [0002] Soil survey is a necessary step before the foundation design of structures, which can provide necessary soil parameters for foundation design, and the accuracy of soil survey directly affects the safety of structure foundations. [0003] At present, in marine engineering, soil survey methods mainly include coring method, cross plate method and CPT static penetration method. The soil samples obtained by the coring method generally need to determine the soil parameters in the geotechnical laboratory, and the soil constraint conditions used are often quite different from the actual force state of the soil on site. Although the cross-plate method and the CPT method are on-site investigation methods, the survey tools and methods used are not the same as the stress conditions of the ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E02D1/00
Inventor 丁红岩练继建张浦阳刘润
Owner TIANJIN UNIV
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