Installation method of pore water pressure gauge in soft ground area
A technology of pore water pressure and installation method, which is applied in the field of foundation soil survey, infrastructure engineering, construction, etc., and can solve problems affecting the stability of roadbeds and slopes, pore water pressure gauges are easily damaged, and monitoring data cannot be obtained, etc. question
Active Publication Date: 2021-08-13
CHINA MCC20 GRP CORP
View PDF3 Cites 0 Cited by
- Summary
- Abstract
- Description
- Claims
- Application Information
AI Technical Summary
Problems solved by technology
[0003] Generally, pore water pressure gauges are mostly installed by laying pipes or directly burying and backfilling them. For soft ground areas, if conventional installation methods are used, the pore water pressure gauges are very easy to be damaged, and effective monitoring data is often not obtained, which affects the Judgment of roadbed and slope stability
Method used
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View moreImage
Smart Image Click on the blue labels to locate them in the text.
Smart ImageViewing Examples
Examples
Experimental program
Comparison scheme
Effect test
Embodiment Construction
[0021] Example figure 1 with figure 2 As shown, the installation method of the pore water pressure gauge in the soft ground area of the present invention comprises the following steps:
[0022] Step 1: Use a standard penetration test to detect the position and depth of the soft soil layer 2 at the position where the pore water pressure gauge 1 is installed, and the pore water pressure gauge 1 needs to be placed in the middle of the soft soil layer 2;
[0023] Step 2: Drill holes by means of water flushing drilling, and put the sleeve 3 with a PVC cover 31 at the bottom to form a hole, and the drilling depth is 1m greater than the bottom depth of the pore water pressure gauge 1;
[0024] Step 3: Clean the inside of the sleeve 3 with water and use a water pump to drain the accumulated water in the sleeve 3, insert a high-pressure water pipe into the bottom of the sleeve 3, and pour cement mortar 4 into the bottom of the sleeve 3 through the high-pressure water pipe with a th...
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More PUM
Login to View More Abstract
The invention discloses a method for installing a pore water pressure gauge in a soft ground area. The method first detects the position and depth of the soft soil layer, drills a hole and puts a sleeve to form a hole, cleans the inside of the sleeve with water and drains the accumulated water. Cement mortar is poured into the bottom of the sleeve through a high-pressure water pipe; the bottom of the pore water pressure gauge is fixed with a cap, the top is connected to a variable diameter joint, and the variable diameter joint is connected to a PVC pipe. Several small holes are drilled on the peripheral surface of the pore water pressure gauge and non-woven geotextile is used. Wrapping, the pore water pressure gauge is placed in the middle of the soft soil layer along the sleeve and the PVC pipe protrudes from the ground; gravel is filled in the sleeve to the depth of the soft soil layer, the top surface of the gravel is stuffed with a rubber plug, and then cemented Fill the top of the sleeve with mortar and cover the exposed PVC pipe; take out the sleeve and place a concrete protection device on the top surface to complete the installation of the pore water pressure gauge. The method effectively reduces the damage rate of the pore water pressure gauge, improves the accuracy of monitoring data, and thus accurately evaluates the effect of soft foundation treatment and the stability of the roadbed.
Description
technical field [0001] The invention relates to an installation method of a pore water pressure gauge in a soft ground area. Background technique [0002] Pore pressure gauges are mainly used in groundwater pressure monitoring in engineering fields such as landslides, water conservancy dams, foundation pits, reservoirs, roadbeds, soft foundations, and ports. During expressway construction, when crossing soft ground areas such as swamps, most of the roadbed sections are located in deep peat soil areas, and the peat soil thickness in some sections exceeds 10m. Therefore, a large number of water pressure gauges need to be installed to ensure the safety of roadbeds and slopes Monitoring is carried out to evaluate the effect of soft foundation treatment, the stability of roadbed, etc. [0003] Generally, pore water pressure gauges are mostly installed by laying pipes or directly burying and backfilling them. For soft ground areas, if conventional installation methods are used,...
Claims
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More Application Information
Patent Timeline
Login to View More Patent Type & Authority Patents(China)
IPC IPC(8): E02D1/02
CPCE02D1/027
Inventor 朱松马国志崔松明张智博唐春乐
Owner CHINA MCC20 GRP CORP