This standard specifies the uniform requirements for the design, production, test methods and inspection rules of strain-controlled direct shear apparatus. This standard applies to strain-controlled direct shear apparatus. This instrument is used to determine the shear strength of soil samples under static load conditions. ? GB/T 4934-1996 Strain-controlled direct shear apparatus GB/T4934-1996 Standard download decompression password: www.bzxz.net

ICs.93.010
National Standard of the People's Republic of China
GB/T 49341996
Strain-controlled direct shear apparatus1996-12-13 Issued
1997-11-01 Implementation
State Administration of Technical Supervision Issued
People's Republic of China
National Standard
Strain-controlled direct shear apparatus
GB/T4934-1996
Published by China Standards Press
No. 15, Erlihebei Street, Fuxingmenwai, Beijing
Postal Code: 100045
Zi: 68622112
Printed by Qindao Printing Factory of China Standards Publishing House
Published by Xinhua Bookstore, Beijing Newly issued. Sold by Xinhua Bookstores in all regions. Copyright reserved. No printing allowed. 880×12301/16. 112 printed sheets. 11 words. First edition in January 1997. First printing in October 1997. Number of copies: 600. Book number: 1550661-14125. Price: RMB 6.00. Standard: 31945. National Standard of the People's Republic of China. Strain-controlled direct shear apparatus. Strain-controlled direct shear apparatus1 Subject content and scope of application
GB/T 4934 1996
Recommended by GI3 4934—85
This standard specifies the unified requirements for the design, production, test methods and inspection rules of strain-controlled direct shear apparatus (hereinafter referred to as direct shear apparatus).
This standard applies to strain-controlled direct shear apparatus, which is used to determine the shear strength of the upper specimen under static load conditions. 2 Reference standards
G3 1219
GI3 4167
GB9357
JJG 144
JJG391
SD 191
ZRY 002
3 Terms
3.1 Normal force
3.2 Shear force
Packaging storage and transportation pictorial symbols
White score table
【～5 Brick code
Permeameter
Verification procedures for standard dynamometer
Test verification procedures for load sensor
Cut soil ring
Instrumentation
Basic environmental conditions and test methods for transportation and storage Perpendicular to the shear plane! Force,
Parallel to the shear plane Ten force,
3.3 Shear displacement Relative movement distance of the shear plane. 4 Product composition
4.1 Product variety
Direct shear instrument can be divided into two types according to the shear operation mode: dynamic type and electric type. 4.2 Product composition
Direct shear instrument is mainly composed of shear box, vertical loading component, shear force application component, accessories, etc., as shown in the figure below. Issued by the State Bureau of Technical Supervision on December 13, 1996
Implementation on November 1, 1997
Product Specifications
GB/T4934—1996
1-Shear transmission mechanism: 2-Pushing suit: 3-Lower shear box: 1-Upper shear box: 5-Vertical displacement early detection device 6-Pressure transmission plate; 7-Permeable slope 18-Water storage box: 9-Shear force measuring device; 10-Shear displacement single measurement device, 11-Linkage device
Figure 1 Schematic diagram of strain-controlled direct shear instrument
The shear box includes an upper box, a lower box, a water storage box, a permeable plate, a pressure transmission plate, etc. Its main specifications should meet the requirements of Table 1. Table 1
Soil sample size
$70.-8X35
Upper box inner diameter
Lower box inner diameter
The maximum normal stress of the vertically loaded component shall meet the requirements of Table 2. Table 2
p61.8×20
479. 8×2C
Diameter of upper permeable plate
Diameter of bottom surface of transmission plate
Components for applying shear force include shearing transmission mechanism, pushing seat, shear displacement measuring device, etc., and their main specifications shall comply with the provisions of Table 3 Table 3
Stroke of pushing shaft
Per wheel revolution...circle
Speed ​​range
mm/min
t. 01-~2. 4
Maximum pushing force
Specifications and measurement range of shear force measuring instrument GB/T 4934—1996
4.3.4 Accessories include ring knife, displacement meter, etc., and their main specifications shall meet the requirements of Table 1. Table
Ten-point scale
$61.8×20
479.8×20
4.4 Working environment conditions
Vertical displacement equipment
4.4.1 The product should be able to work in an environment with a temperature of 5~35℃ and a relative condensation of less than 85%. 0~10
Shear displacement scale
4.4.2 Products using electrical measuring devices should work in an environment with a temperature of 20℃±10℃ and a relative humidity of less than 85%. 5 Technical requirements
5.1 Scratcher
a. The ring knife should comply with the relevant provisions of SD19I; h. The permeable board should comply with the relevant provisions of GB9357: 5.2 The relative error of the normal force should not be greater than 1%. 5.3 Code
The carbon code should comply with the relevant provisions in GB 4167. 5.4 Shear force measurement device
5.4.1 When measuring with a dynamometer, the relative error of its indication should not be less than 1.5% within the range of 10% to 30% of the maximum load. It should not be greater than 1% within the range of 30% to 100% of the load. The indication error of the dynamometer for manual reading should not exceed 0.02 mm, and the error of the long pointer for any rotation of one circle should not exceed a.
b. The displacement sensor used for automatic measurement of the dynamometer should have an accuracy of not less than 0.3%F·S; 5.4.2 The accuracy of the load sensor should not be less than 0.3%F·S. 5.5 When the push seat is manually pushed, the relative error of the shaft travel should be less than 10% for each rotation of the hand wheel. 5. 6 When the push seat is electrically operated
a. Under rated voltage and load conditions, the relative error between the average speed of the driving shaft (in mm/min) measured by multiple drinking (5 times in mm/min) and the design standard speed should be less than 10; the instrument table amplitude should be less than 0.003mm
The instrument noise should be lower than 75dB(A)
5.7 The comprehensive error of the instrument is not more than 2.5%. 5.8 After the assembled instrument is transported and shaken, it should comply with the relevant provisions of ZBY002. 5.9 The surface and appearance of the instrument should meet the following requirements: There should be no pores and sand holes on the surface of the instrument casting; a.||t t||The paint or coating of the instrument should be smooth, even and consistent in color; there should be no spots, bubbles, peeling, bumps, scratches and rust.
6 Test method
6.1 Test in Article 5.1 of this standard, the ring knife should be tested according to the relevant test method in SI) 191. a
Place the permeable board in a special test container (sealable in the direction, only allow water to seep in from I:), and test it in reverse according to the relevant provisions of GBJ123. b.
6.2 Test force method in Article 5.3 of this standard
GB/T 4934
The base code shall be tested in reverse according to the relevant test methods in GB4167. 6.3 Test methods in Article 5.4 of this standard
6.3.1 The dynamometer shall be tested in accordance with the relevant provisions of JJG1441996
The dial indicator shall be tested in accordance with the relevant test methods in G131219; a
The displacement sensor shall be tested in accordance with the relevant provisions of 391+, 6.3.2
The load sensor shall be tested in accordance with the relevant provisions of JIG391. The test method in Article 5.5.5.6a of this standard The relative error of the stroke rate of the driving shaft is tested with a dial indicator, and the calculation formula is as follows; 100%
Wuhan Electric: t-
"Rate range error, %;
Design nominal rate, mm/min;
The average rate of multiple measurements, mIn/min. Table vibration amplitude inspection method: Place the vibration pickup vertically on the instrument table, connect the voltmeter and power supply, select the fastest gear, start the machine for h.
operation to test its amplitude.
The noise of the instrument is tested with a sound level meter with an application error of less than 2~3dB 6.5 Test method of Article 5.7 of this standard: The test should be carried out in accordance with the relevant provisions of CBJ123. 6.6 Article 5.8. Tests: Tests shall be conducted in accordance with the relevant provisions of 7BY002. 6.7 Visual inspection of the instrument appearance.
Inspection rules
Each instrument shall be inspected by the quality inspection department of the manufacturer and accompanied by a quality certificate before it can leave the factory. Inspections are divided into factory inspections and type tests!
Products undergo type tests in the following circumstances: new product finalization and old product modification:
When there are major changes in product design, process, and materials: h.
When comparing solid products
Type tests shall be conducted in accordance with all technical requirements and test method clauses of this regulation. 7. 1.2
Both devices must undergo factory inspections before leaving the factory
Factory inspections are divided into full inspections and sampling inspections. The categories and items of factory inspections shall comply with the provisions of Table 5. Table
Inspection date
Shear and other devices
Normal force
Technical requirements clause
Test method clause
Inspection type
All inspection
Sampling inspection,
All inspection
Release test
Inspection of this item
Push rail
Transport exposure
Double device surface and appearance
GB/T 4934-1996
Continued Table 5
Technical requirements clause
Test method clause
Inspection type
Type test
Sampling inspection
Type test
Sampling inspection
7.2 All inspections are conducted on each product. If unqualified, repair it until it is qualified. 7.3 Sampling inspection Random sampling is carried out according to 5% to 10% of the number of products in each batch. When the sampling items are found to be unqualified, double re-inspection or test one by one should be decided according to the nature of the problem, and repair should be carried out to ensure the product is qualified. 8 Marking, packaging, transportation, storage
8.1 The instrument should be equipped with a nameplate and can be kept clear for a long time. Its content includes the manufacturer's name and trademark;
Product name, model and specifications;
Product manufacturing year, month and number.
8.2 The packaging of the instrument should meet the following requirements
8.2.1 The main machine, parts and accessories and spare parts of the instrument should be packed in separate boxes. The materials and structures selected for the packaging box should be able to prevent the intrusion of wind, sand and rain. 8. 2. 2
Unpainted parts should be packed with oil seals.
The packaged instrument must be stable and shock-resistant. The box surface mark should be able to withstand wind and rain, and its content includes product name and model mark:
Destination port or station;
Consignor and consignee;
Box number and item number:
Gross weight (kg)
Net weight (kg);
Box size (length × width × volume) mm
The packaging and transportation operation mark should comply with the relevant provisions of GB19!. The following documents should be included in the box:
Packing list;
Product export qualification certificate; wwW.bzxz.Net
Product instructions for use:
Calibration data of shear force measuring device,
8.3 The packaged products should be suitable for land, water and air transportation. 8.4 The packaged products should be stored in a well-ventilated, dust-free and sunlight-free place. Additional instructions:
This standard is proposed by the Ministry of Electric Power Industry.
GB/T4934—1996
This standard was drafted by Nanjing Electric Power Equipment General Manager. The main drafters of this standard are Jing Yixin and Huang Taotao. This standard was first issued in 1985 and revised for the first time in 1996. Wanxiezhi17bzw.cnCrisp Dai Gan He Yao Di Fatigue Travel Science 5 Fin Lake
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