GB/T 4935-1996 Single lever consolidation instrument

This standard specifies the unified requirements for the design, production, test methods and inspection rules of the single-lever oedometer. This standard applies to the single-lever oedometer. The instrument is used to determine the consolidation characteristics of soil samples under conditions without lateral deformation. GB/T 4935-1996 Single-lever oedometer GB/T4935-1996 Standard download decompression password: www.bzxz.net

ICS 93. 010
National Standard of the People's Republic of China
GB/T4935—1996
Single lever arm oedometer
1996-12-13 Issued
State Administration of Technical Supervision
1997-11-01 Implementation
National Standard of the People's Republic of China
Single lever
Single lever arm oedometer
Subject Content and Scope of Application
GB/T 4935—1996
Replaces GB493585
This standard specifies the unified requirements for the design, production, test methods and inspection rules of the single lever oedometer. This standard applies to the single lever oedometer. The instrument is used to determine the consolidation characteristics of the upper specimen under the condition of no lateral deformation. Reference standards
GB1219
GB4167
G35357
GBJ123
SD 191
Packaging, storage and transportation diagrams and symbols
White division table
1~5 basic codes
Geotechnical test method standards
Soil cutting ring
7BY02 Instruments and meters. Basic environmental conditions and test methods for transportation and storage 3 Terminology
Consolidation instrument: It is a consolidation test to measure the consolidation of soil samples under conditions of no lateral deformation to determine its consolidation characteristics and its parameters. Duto output force value
The lever output force value is the force value reflected at the force point after a force is applied to the lever under a certain lever ratio. 4 Product composition
Structural form
The single lever consolidation instrument consists of a consolidation container, a pressure component and a measuring component. When applying a larger load, a loading device should be provided, and its structural diagram is as follows:
Approved by the State Bureau of Technical Supervision on December 13, 1996 and implemented on November 1, 1997
GE/T4935—1996
1Digital indicator; 2·Digital hanger?3Pressure transmission plate; 4Permeable plate; 5—Ring knife; 6—Calibration sample block; 7—Guard ring, 8Lower permeable plate: 9—Container base
10Valve, 11Pressure frame: 12—Table plate; 13-Lever: 14—Magnetic code disk: 15—Land code 16—Balance hammer Figure 1 Schematic diagram of single-lever consolidation instrument
4.2 Product specifications
4.2.1 Consolidation container
The consolidation container is mainly composed of a water storage box, a guard ring, a permeable plate, a small hammer, a pressure transmission plate, etc. The specifications of the ring knife and the permeable plate shall comply with the provisions in Table 1,
Ring specifications
Area, cmbZxz.net
4.2.2 Pressurizing device
Dimensions, tntn
$79.8×20
Permeable plate specifications
FPermeable plate diameter, mm
Lower permeable plate diameter: mm
Lever ratio is 10:1 and 12:1. The output shall comply with the relevant requirements in the SD106 geotechnical test instrument series spectrum. The maximum axial pressure shall comply with the provisions of Table 2.
Measuring device
Sample area, cm
GB/T 4935--1996
Manual reading scale range, minimum scale value is 0.01mm!b.
Automatic reading displacement sensor, accuracy not less than 0.3%F·S. Working environment conditions
Maximum axial pressure, MPa
0. 6, 0. 8, 4. 0
The product should be able to work in an environment with a temperature of +5℃+35℃ and a relative humidity of less than 85%b
Products using electrical measuring instruments should work in an environment with a temperature of 20℃±10C and a relative humidity of less than 85%. 5 Technical requirements
Condensation container
The ring knife should comply with the relevant provisions in SD191, and the permeable plate should comply with the relevant provisions in GB9357. 5.2 After the lever is balanced, its sensitivity is 0.02% of its maximum output force. When the lever output force is 2.5% of the maximum value and above, the relative error does not exceed ±1%. When it is below 2.5%, it is not assessed. 5.3 Magnetic code The base code shall comply with the relevant provisions of GB1167. 5.4 The measuring device The dial indicator shall comply with the relevant provisions of GB1219. b The accuracy of the displacement sensor shall not be less than 0.3%F·S 5.5 Transport shock resistance The packed instrument shall meet the following requirements after the transport shock resistance test a. The packaging is intact; the instrument is not loose and the parts are not damaged; the surface is intact. The lever performance shall still meet the requirements of Article 5.2. 5.6
Surface appearance
The surface coating of the instrument is intact, the color is uniform and coordinated, and there is no peeling, bumps, scratches, rust and other defects. 6 Test method
6. 1 Test method 2 of Article 5.1 of this standard
Special plug gauge to check the inner diameter of the ring cutter, special card plate or dry ruler to check the height, and measure the surface roughness by standard sample block ratio. Determine the permeability coefficient according to the relevant provisions of GBJ123. b.
6.2 Test method of Article 5.2 of this standard
a Level the lever, place a 100N third-class standard dynamometer under the pressure frame, and adjust the dynamometer to zero after aligning the contact. b. Apply the corresponding load on the code disk according to the force value after 0.02% of the maximum output force of the lever divided by the lever ratio. If the dynamometer has a clear response, it is considered that the sensitivity meets the requirements. c. Take 2.5%, 50% and full load points of the maximum output force as the inspection points, prepare the force gauges corresponding to the above three points and place them under the pressure frame in turn. After the contact is aligned, adjust the force gauge to zero. d. Apply the corresponding code according to the load value of each inspection point, record the reading, and check the corresponding error of the output force value of each point, which should meet the requirements of Article 5.2.
6-3 Test method of Article 5.3 of this standard
Codes should be tested in accordance with the relevant provisions of GB 4167. 6.4 Test method of Article 5.4 of this standard
. The dial indicator should be tested in accordance with the relevant provisions of GB1219. b. The displacement sensor should be tested in accordance with the relevant provisions of JJG391. 6.5 Transport shock resistance
Test and test in accordance with the relevant provisions of ZBY002. 6.6 Surface and appearance
Visual inspection of the instrument appearance.
7 Inspection rules
7.1 Each instrument must be inspected and qualified by the quality inspection department of the manufacturer and accompanied by a quality certificate before it can leave the factory. Inspection is divided into two types: delivery inspection and type test.
7.1.1 Products should be subjected to type test in the following cases a.
New products are finalized or old products are modified;
When there are major changes in product design, process, and materials or when old products that have been discontinued for more than three years are resumed; b.
When comparing similar products.
Type test shall be carried out in accordance with all technical requirements and test methods of this standard. 7.1-2 Before leaving the factory, the instrument must be inspected and tested. The delivery inspection is divided into two types: full inspection and sampling inspection. The categories and items of delivery inspection shall comply with the provisions of Table 3. Table 3
Inspection Items
Compression Container
Permeable Plate
Sensitivity
Output Force Value
Surface and Appearance
Technical Requirements Clauses
Test Method Clauses
7.2 All inspections are conducted on each product. If unqualified, the products will be returned until they are qualified. Inspection Types
7.3 Sampling Inspection Random sampling is conducted based on 5% to 10% of the quantity of each batch of products. If unqualified items are found in the sampling inspection, double re-inspection or subsequent testing should be carried out according to the nature of the problem, and the products should be returned for repair to ensure that they are qualified. 8 Marking, Packaging, Transportation, Storage
8.1 Marking
8.1.1 The product marking should be placed in a conspicuous position on the product and can remain clear for a long time. Its contents include a.
Manufacturer name and trademark:
b. Product name, model, specification;
Main parameters of the product;
Manufacturing date, serial number or production batch number.
8.1.2 Packing box mark
GB/T 4935-1996
The packing box mark should comply with the relevant provisions of GB1918.2 Packing
8.2.1 The packing box must be strong and waterproof. The packing method should be packed according to the detachable parts. 8.2.2 The lever should avoid collision. It is not allowed to be supported by the upper and lower limit screws. It should be tied firmly after being padded with soft objects. The rotating part is dustproof. 8.3 The host must be fixed firmly. If there are foot holes, bolts should be used to fix it to the bottom plate of the packaging box to prevent it from moving and tipping over. 8.4 The accompanying documents should be placed in a plastic bag and packed into the host box together with the product. The accompanying documents include the factory certificate; b. Packing list; product manual.
The well-packaged products should be suitable for water, land and air transportation. 8.4 The products should be placed in a ventilated, dry warehouse without carbon dust and avoiding direct sunlight. Additional remarks:
This standard is proposed by the Ministry of Electric Power Industry.
This standard is drafted by Nanjing Electric Power Automation Equipment General Factory. This standard was drafted by Zhang Xin and Huang Taotao. This standard was first issued in 1985. This standard was revised for the first time in 1996. National Standard of the Chinese People's Government GB/T 4935-1996 Published by China Standards Press No. 16, Sanlihebei Street, Fuxingmenwai, Beijing Postal Code: 100015 Tel: 68522112 Printed by China Standards Press, Huangdao Yinding Factory Distributed by Xinhua Bookstore, Beijing Distribution Office Sold by Xinhua Bookstores in various places Copyright exclusive Reproduction prohibited Format 880×1230 1/16
Printing sheet 1/2
Word count 10f words
First edition in October 1997
First printing in October 1997
Print count 1-700
Book number: 155066·1-14126
Price 6.00 yuan
Standard date 320-27
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