Al technical title is built by PatSnap Al team. It summarizes the technical point description of the patent document.
An evaluation method and technology of soil mechanics, applied in soil material testing, material inspection products, etc.
Inactive Publication Date: 2013-01-16
INST OF ENG MECHANICS CHINA EARTHQUAKE ADMINISTRATION
View PDF1 Cites 3 Cited by
Summary
Abstract
Description
Claims
Application Information
AI Technical Summary
This helps you quickly interpret patents by identifying the three key elements:
Problems solved by technology
Method used
Benefits of technology
Problems solved by technology
[0005] The purpose of this invention is to provide a method for evaluating the mechanical properties of gravel soil to solve the problem of international versatility in the evaluation of mechanical properties of gravel soil
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 more
Image
Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
Click on the blue label to locate the original text in one second.
Reading with bidirectional positioning of images and text.
Smart Image
Examples
Experimental program
Comparison scheme
Effect test
specific Embodiment approach 1
[0032] Specific implementation mode 1: see 1-2, the specific process of a method for evaluating the mechanical properties of gravel soil described in this implementation mode is:
[0033] Step A, correction process of super heavy dynamic penetrating hammer number:
[0034] Step A1. Select a typical gravel soil site, use super heavy dynamic penetrating sounding standard probe and 120kg standard weight to conduct super heavy dynamic penetrating sounding test, test the energy transmitted by the heavy hammer to the drill pipe, and calculate the ratio of the transmitted energy to the theoretical total energy , a total of more than 1200 basic data were obtained;
[0035] Step A2. According to statistics of more than 1200 data, the energy ratio delivered by the 120kg heavy hammer of the ultra-heavy-duty dynamic penetrating test under the conventional operating procedures has an average value of about 90% and a standard deviation of 7.8%;
[0036] Step A3, using super-heavy power pen...
Embodiment
[0055] 1. Adopt super heavy-duty dynamic penetrating probe standard probe ( figure 2 );
[0056] 2. If the ultra-heavy-duty dynamic penetration penetrating 120kg heavy hammer is used, the hammer number obtained from the test will not be corrected for energy;
[0057] 3. If other hammers with different hammering energy are used, it is necessary to measure the transfer energy of the hammer used, and calculate the transfer energy ratio according to the theoretical total energy of the 120kg hammer, which is 1.2kN.m, and perform energy correction according to formula (6) ;
[0058] 4. The number of power penetrating strikes after energy correction N m-120 (stroke / 30cm), the degree of compaction of gravel soil is determined according to Table 1:
[0059] Table 1 Classification of compactness of gravel soil
[0060]
[0061] 5. Using the number of power penetrating strikes after energy correction N m-120 , to judge the liquefaction of gravel soil:
[0062] 1) Calculate the ...
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 gravel soil mechanical property evaluation method, relates to the gravel soil extra-heavy dynamic sounding core conversion technology and the international general technology for gravel soil mechanical property evaluation and aims to solve the problem of international generality of gravel soil mechanical property evaluation. The gravel soil mechanical property evaluation method includes: taking a Chengdu plain gravel soil field as a background, adopting an extra-heavy dynamic sounding test standard probe and a 120kg standard heavy punch for field test, establishing a gravel soil liquefaction discrimination model based on extra-heavy dynamic sounding blow counts, putting forward a computational formula, testing effective energy of the heavy punch transferring to a sounding rod, performing statistical analysis of transferred energy ratio of the effective energy to the total energy under standard test, and establishing blow count correction factor suitable for dynamic sounding of various heavy punches. The gravel soil mechanical property evaluation method is simple, convenient, economical and practical in field test means, a gravel soil liquefaction discrimination method is good in reliability, and the constructed dynamic sounding core conversion technology is simple and clear and can provide the domestic and overseas general technology for gravel soil field mechanical property evaluation.
Description
technical field [0001] The invention relates to a method for evaluating the mechanical properties of gravel soil. Background technique [0002] Gravel soil refers to a wide-grade mixed soil composed of gravel, gravel, sand, silt, clay, etc. It is one of the typical soil types in nature and is widely distributed around the world. At present, most earth-rock dams at home and abroad use gravel as a cushion, and artificial gravel materials are increasingly used in the construction of artificial reclamation, highways, railways, etc. The performance and performance of gravel soil under dynamic and static conditions is the key to rock The questions that must be answered in civil engineering are of great significance to ensure the safety of various infrastructures and various projects. [0003] The evaluation of mechanical properties such as modulus, compactness, bearing capacity, and liquefaction discrimination of gravel soil is a problem of great concern in engineering. At prese...
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
Application Date:The date an application was filed.
Publication Date:The date a patent or application was officially published.
First Publication Date:The earliest publication date of a patent with the same application number.
Issue Date:Publication date of the patent grant document.
PCT Entry Date:The Entry date of PCT National Phase.
Estimated Expiry Date:The statutory expiry date of a patent right according to the Patent Law, and it is the longest term of protection that the patent right can achieve without the termination of the patent right due to other reasons(Term extension factor has been taken into account ).
Invalid Date:Actual expiry date is based on effective date or publication date of legal transaction data of invalid patent.
Login to view more
Patent Type & Authority Applications(China)
IPC IPC(8): G01N33/24
Inventor 曹振中袁晓铭
Owner INST OF ENG MECHANICS CHINA EARTHQUAKE ADMINISTRATION