CN108760517B - Foundation coefficient K of sand-filled roadbed30Correction test device and test method thereof - Google Patents
Foundation coefficient K of sand-filled roadbed30Correction test device and test method thereof Download PDFInfo
- Publication number
- CN108760517B CN108760517B CN201810492416.8A CN201810492416A CN108760517B CN 108760517 B CN108760517 B CN 108760517B CN 201810492416 A CN201810492416 A CN 201810492416A CN 108760517 B CN108760517 B CN 108760517B
- Authority
- CN
- China
- Prior art keywords
- bearing plate
- test
- constraint
- roadbed
- test bearing
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
- 238000012360 testing method Methods 0.000 title claims abstract description 71
- 239000004576 sand Substances 0.000 title claims description 36
- 238000010998 test method Methods 0.000 title claims description 11
- 238000012937 correction Methods 0.000 claims abstract description 27
- 238000000034 method Methods 0.000 claims abstract description 16
- 238000006073 displacement reaction Methods 0.000 claims abstract description 7
- 238000005096 rolling process Methods 0.000 claims description 9
- 238000005056 compaction Methods 0.000 abstract description 10
- 238000010276 construction Methods 0.000 abstract description 9
- 239000000945 filler Substances 0.000 description 10
- 239000002689 soil Substances 0.000 description 8
- 239000000463 material Substances 0.000 description 4
- 239000002245 particle Substances 0.000 description 3
- 230000006835 compression Effects 0.000 description 2
- 238000007906 compression Methods 0.000 description 2
- 238000001514 detection method Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000002950 deficient Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 230000004438 eyesight Effects 0.000 description 1
- 239000010419 fine particle Substances 0.000 description 1
- 239000003110 molding sand Substances 0.000 description 1
- 230000000452 restraining effect Effects 0.000 description 1
- 230000000630 rising effect Effects 0.000 description 1
- 238000007873 sieving Methods 0.000 description 1
- 238000010561 standard procedure Methods 0.000 description 1
- 239000004575 stone Substances 0.000 description 1
- 238000012795 verification Methods 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N3/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N3/08—Investigating strength properties of solid materials by application of mechanical stress by applying steady tensile or compressive forces
- G01N3/10—Investigating strength properties of solid materials by application of mechanical stress by applying steady tensile or compressive forces generated by pneumatic or hydraulic pressure
- G01N3/12—Pressure testing
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N3/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N3/62—Manufacturing, calibrating, or repairing devices used in investigations covered by the preceding subgroups
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N2203/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N2203/0014—Type of force applied
- G01N2203/0016—Tensile or compressive
- G01N2203/0019—Compressive
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N2203/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N2203/003—Generation of the force
- G01N2203/0042—Pneumatic or hydraulic means
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N2203/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N2203/0058—Kind of property studied
- G01N2203/0069—Fatigue, creep, strain-stress relations or elastic constants
- G01N2203/0075—Strain-stress relations or elastic constants
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N2203/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N2203/02—Details not specific for a particular testing method
- G01N2203/0202—Control of the test
- G01N2203/021—Treatment of the signal; Calibration
Landscapes
- Physics & Mathematics (AREA)
- Health & Medical Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Chemical & Material Sciences (AREA)
- Analytical Chemistry (AREA)
- Biochemistry (AREA)
- General Health & Medical Sciences (AREA)
- General Physics & Mathematics (AREA)
- Immunology (AREA)
- Pathology (AREA)
- Engineering & Computer Science (AREA)
- Manufacturing & Machinery (AREA)
- Investigating Strength Of Materials By Application Of Mechanical Stress (AREA)
- Investigation Of Foundation Soil And Reinforcement Of Foundation Soil By Compacting Or Drainage (AREA)
Abstract
The device comprises a K 30 test bearing plate (1) with the diameter d 0 =0.30m, a displacement meter (1 b) on the K 30 test bearing plate (1) and a loading jack (1 a) arranged right above the center of the K 30 test bearing plate (1); the method is characterized in that: the outer Zhou Taoge of the K 30 test bearing plate (1) is provided with a circular ring-shaped constraint plate (2) with the inner diameter d=0.31m and the outer diameter d=1.00 m, and more than two constraint jacks (2 a) are arranged right above the constraint plate (2). The correction value of the foundation coefficient K 30 measured by the device can more accurately reflect the actual deformation resistance capability of the roadbed filling layer, and effectively reduce the roadbed construction cost on the premise of ensuring the compaction quality of the roadbed.
Description
Technical Field
The invention relates to a geotechnical test method, in particular to a correction test method for foundation coefficient K 30 of a sand filling roadbed.
Background
The foundation coefficient K 30 test is a small panel load test. The method comprises the following steps: and (3) carrying out step-by-step loading on a rigid bearing plate with the diameter of 0.30m on the surface of the flat roadbed filling soil, measuring the corresponding load when the sinking amount of the bearing plate is 1.25mm, and dividing the load by a value of 1.25 to obtain the foundation coefficient K 30. The foundation coefficient K 30 can better reflect the deformation resistance of the roadbed, and the railway department in China adopts K 30 index to test the construction quality of roadbed filling in the construction of large Qin line first, so that the method becomes a basic field detection method in the process of filling the roadbed in China at present: in the process of filling and rolling layer by layer, a foundation coefficient K 30 test is carried out on the current layer, when the measured foundation coefficient K 30 index is not qualified, the rolling is needed again until the measured foundation coefficient K 30 is qualified, and then filling and rolling of the next (upper) layer can be carried out. To ensure the compaction quality of the roadbed fill. However, for the sand filling roadbed, due to the fact that the particle size of the sand filling material is uniform, the content of fine particles is low, cohesive force and embedding force are lacked among particles, vertical constraint is insufficient, when a foundation coefficient K 30 test is carried out, the sand filling material around the bearing plate can generate different degrees of uplift phenomena along with the gradual application of load, so that the settlement of the bearing plate is mainly caused by insufficient constraint of surrounding shallow sand, the measured foundation coefficient is obviously reduced, and the compaction quality of the sand filling roadbed cannot be truly reflected. In the actual construction process, along with the layer-by-layer filling of the roadbed, the lower filling layer is vertically constrained by the subsequent upper filling layer, and the actual deformation resistance of the lower filling layer is enhanced. Therefore, the quality detection of each rolling layer is carried out by adopting the existing foundation coefficient K 30 test method, so that the compaction quality of the rolling layer is deteriorated, the usable sand-like soil filler cannot meet the test index and is discarded, and the construction cost is obviously increased by using the deficient soil-stone filler.
Disclosure of Invention
The first object of the invention is to provide a correction test device for the foundation coefficient K 30 of a sand-filled roadbed, which can more accurately reflect the actual deformation resistance capability of a roadbed filling layer by using the correction value of the foundation coefficient K 30 measured by the device, and can effectively reduce the roadbed construction cost on the premise of ensuring the compaction quality of the roadbed.
The adopted technical scheme for realizing the first eyesight improvement is that the foundation coefficient K 30 correction test device of the sand filling roadbed comprises a K 30 test bearing plate with the diameter d 0 =0.30 m, a displacement meter on the K 30 test bearing plate and a loading jack arranged right above the center of the K 30 test bearing plate; the method is characterized in that:
The outer Zhou Taoge of K 30 test loading board internal diameter d=0.31m, external diameter D=1.00 m's ring-shaped restraint board, restraint board set up the restraint jack more than two directly over the restraint board.
The second object of the present invention is to provide a method for performing a correction test for the foundation coefficient K 30 by using the correction test device for the foundation coefficient K 30 of the sand-filled subgrade, which can effectively measure the correction value for the foundation coefficient K 30, and the correction value can more accurately reflect the actual deformation resistance of the subgrade filling layer, and can effectively reduce the construction cost of the subgrade on the premise of ensuring the compaction quality of the subgrade.
The technical proposal adopted by the invention for realizing the second invention is that the correction test device for the foundation coefficient K 30 of the sand filling roadbed is used for carrying out the correction test for the foundation coefficient K 30 of the sand filling roadbed, which comprises the following steps of
A. Placing the K 30 test bearing plate and the constraint plate on the surface of a roadbed rolling layer of a smooth sand-filled roadbed, and always applying a fixed constraint pressure of 15kPa to the constraint plate by a constraint jack; the loading jack applies load to the K 30 test bearing plate step by step; meanwhile, the displacement meter on the K 30 test bearing plate measures the sinking amount of the K 30 test bearing plate when the load of each stage is applied, and the test is ended when the sinking amount exceeds 1.25mm and the loading stage number is not less than 5;
B. According to the load application value of the loading jack to each stage of the K 30 test bearing plate and the subsidence amount of the corresponding K 30 test bearing plate, the load application value corresponding to the subsidence of the K 30 test bearing plate by 1.25mm is obtained, and then the load application value is divided by 1.25, so that the foundation coefficient K 30 correction value of the sand filling roadbed is obtained.
Compared with the prior art, the invention has the beneficial effects that:
The loading device in the 0.30m test area and the operation method thereof are completely consistent with the existing K 30 test device. The added circular ring-shaped constraint plate with the inner diameter of 0.31m is sleeved on the bearing plate with the diameter of 0.30m, and the two constraint plates are in clearance fit, so that the settlement of the loading plate is not affected by the constraint plate. Meanwhile, the annular constraint plate applied with 15kPa load can effectively restrain and inhibit the sand filler from rising in the area near the loading plate below the constraint plate; and the bulge of the filling material outside the constraint plate Zhou Shatu is more than 1m away from the test center, so that the influence on the filling soil settlement of the 0.30m central area can be neglected. This is in contrast to the fact that the lower fill is vertically constrained by the subsequent upper fill during construction, the lower fill does not bulge, and the lower fill subsides more closely in relation to compression set itself. Therefore, the settlement of the bearing plate is mainly caused by the compression deformation of the filling soil below the bearing plate, and the measured foundation coefficient correction value can more truly reflect the compaction quality and deformation resistance of the sand filling roadbed. Therefore, the sand soil filler which can be used is avoided, and the sand soil filler cannot meet the test index and is discarded, and the engineering cost is effectively reduced on the premise of ensuring the road foundation compaction quality.
Tests show that for the fine sand filler roadbed, the K 30 value obtained by the method is improved by about 35 percent compared with the standard method. Therefore, the existing K 30 test method has great error, deteriorates the compaction quality of the rolling layer, and can lead the usable sand soil filler to be abandoned because the sand soil filler can not meet the test index.
Further, the constraint plate is uniformly divided into the sector rings with the same number as the constraint jacks, and each constraint jack is positioned on the center of the sector ring where the constraint jack is positioned.
In this way, the restraint load of restraint board received is more even, balanced.
The invention is described in further detail below with reference to the drawings and the detailed description.
Drawings
FIG. 1 is a graph showing load strength versus deflection obtained by testing a roadbed model constructed from fine sand fillers using the present invention and prior art devices.
FIG. 2 is a schematic cross-sectional view of an embodiment of the invention at the time of testing.
FIG. 3 is a schematic cross-sectional view A-A of FIG. 2.
Detailed Description
Examples
The invention relates to a foundation coefficient K 30 correction test device of a sand filling roadbed, which comprises a K 30 test bearing plate 1 with the diameter d 0 =0.30 m, a displacement meter 1b on the K 30 test bearing plate 1 and a loading jack 1a arranged right above the center of the K 30 test bearing plate 1; the method is characterized in that:
The outer Zhou Taoge of the K 30 test bearing plate 1 is provided with a circular ring-shaped constraint plate 2 with an inner diameter d=0.31m and an outer diameter d=1.00 m, and more than two constraint jacks 2a are arranged right above the constraint plate 2.
The restraint plate 2 in this example is uniformly divided into sector rings with the same number as the restraint jacks 2a, and each restraint jack 2a is located on the center of the sector ring where it is located. The number of restraining jacks in fig. 2 is two, and two fan rings (semicircular rings) are shown by dotted lines.
The method for performing the correction test of the foundation coefficient K 30 of the sand filling roadbed by using the correction test device of the foundation coefficient K 30 of the sand filling roadbed comprises the following steps:
A. Placing the K 30 test bearing plate 1 and the constraint plate 2 on the surface of a roadbed rolling layer of a smooth sand-filled roadbed, and always applying a fixed constraint pressure of 15kPa to the constraint plate 2 by a constraint jack 2 a; the loading jack 1a applies load to the K 30 test bearing plate 1 step by step; meanwhile, the displacement meter 1b on the K 30 test bearing plate 1 detects the sinking amount of the K 30 test bearing plate 1 when the load of each stage is applied, and the test is ended when the sinking amount exceeds 1.25mm and the loading stage number is not less than 5;
B. According to the load application value of the loading jack 1a to each stage of the K 30 test bearing plate 1 and the corresponding sinking amount of the K 30 test bearing plate 1, the load application value corresponding to the sinking of the K 30 test bearing plate 1 by 1.25mm is obtained, and then the load application value is divided by 1.25, so that the foundation coefficient K 30 correction value of the sand filling roadbed is obtained.
The following is a specific experimental verification example using the apparatus of this example.
And filling a sand roadbed model in the indoor model groove, and performing a foundation coefficient K 30 test. The plane size of the model is 1.80m multiplied by 1.80m, the height is 0.60m, and the model is 6 times and 2 times of the diameter (0.3 m) of the K 30 bearing plate respectively, and the influence of boundary effect is small. The test material is from Liaohe river basin fire Bohai railway along-line construction site. The particle composition was obtained by sieving experiments: the maximum grain diameter is not more than 2mm, the grain content of 0.075-0.5 mm is 95.3%, the grain content of less than 0.075mm is only about 4.6%, the non-uniformity coefficient of the filler is C u =3.04, the curvature coefficient is C c =1.02, and the uniform grading fine sand is prepared; the molding sand compaction coefficient K=0.92, the water content w=10%, the density ρ=1.82 g/cm 3, and the roadbed model is filled in 3 layers, and each layer is 0.20m.
The test is carried out according to the existing foundation coefficient K 30 test method and the device of the invention in the railway geotechnical test procedure (TB 10102-2010) to obtain a load strength-sinking relation curve, as shown in figure 1. From the test data, the K 30 value measured by the prior device is 100MPa/m, and the K 30 correction value measured by the device and the method is 138MPa/m, which is increased by 38%.
Claims (2)
1. The correction test method for the foundation coefficient K 30 of the sand filling roadbed comprises a correction test device, wherein the correction test device comprises a K 30 test bearing plate (1) with the diameter d 0 =0.30 m, a displacement meter (1 b) on the K 30 test bearing plate (1) and a loading jack (1 a) arranged right above the center of the K 30 test bearing plate (1); the method is characterized in that:
The outer Zhou Taoge of the K 30 test bearing plate (1) is provided with a circular ring-shaped constraint plate (2) with the inner diameter d=0.31m and the outer diameter d=1.00 m, and more than two constraint jacks (2 a) are arranged right above the constraint plate (2);
the correction test device for the foundation coefficient K 30 of the sand-filled roadbed is used for carrying out the correction test method for the foundation coefficient K 30 of the sand-filled roadbed, and the method comprises the following steps:
A. Placing the K 30 test bearing plate (1) and the constraint plate (2) on the surface of a roadbed rolling layer of a smooth sand-filled roadbed, and always applying a fixed constraint pressure of 15kPa to the constraint plate (2) by a constraint jack (2 a); the loading jack (1 a) applies load to the K 30 test bearing plate (1) step by step; meanwhile, a displacement meter (1 b) on the K 30 test bearing plate (1) detects the sinking amount of the K 30 test bearing plate (1) when the load of each stage is applied, and the test is ended when the sinking amount exceeds 1.25mm and the loading stage number is not less than 5;
B. According to the load application value of the loading jack (1 a) to each stage of the K 30 test bearing plate (1) and the sinking amount of the corresponding K 30 test bearing plate (1), obtaining the load application value corresponding to the sinking of the K 30 test bearing plate (1) by 1.25mm, and dividing by 1.25, thus obtaining the foundation coefficient K 30 correction value of the sand filling roadbed.
2. The correction test method for the foundation coefficient K 30 of the sand-filled roadbed according to claim 1, wherein the correction test method is characterized by comprising the following steps: the constraint plate (2) is uniformly divided into fan rings with the same number as the constraint jacks (2 a), and each constraint jack (2 a) is positioned on the center of the fan ring where the constraint jack is positioned.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810492416.8A CN108760517B (en) | 2018-05-22 | 2018-05-22 | Foundation coefficient K of sand-filled roadbed30Correction test device and test method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810492416.8A CN108760517B (en) | 2018-05-22 | 2018-05-22 | Foundation coefficient K of sand-filled roadbed30Correction test device and test method thereof |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN108760517A CN108760517A (en) | 2018-11-06 |
| CN108760517B true CN108760517B (en) | 2024-05-07 |
Family
ID=64007609
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201810492416.8A Active CN108760517B (en) | 2018-05-22 | 2018-05-22 | Foundation coefficient K of sand-filled roadbed30Correction test device and test method thereof |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN108760517B (en) |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110082202B (en) * | 2019-04-18 | 2020-03-17 | 河海大学 | Flat plate load indoor model test device and use method |
| CN110941869B (en) * | 2019-11-27 | 2024-03-22 | 东南大学 | Numerical simulation method for obtaining foundation coefficient of roadbed soil |
| CN112505297A (en) * | 2020-11-23 | 2021-03-16 | 中建八局第一建设有限公司 | Roadbed environment monitoring platform manufacturing method and environment monitoring platform |
Citations (18)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| BE647687A (en) * | 1963-05-09 | 1964-11-09 | ||
| CN1127902A (en) * | 1994-12-01 | 1996-07-31 | 卡西欧计算机公司 | Computers with a proof function |
| EP0947622A2 (en) * | 1998-03-31 | 1999-10-06 | Kabushiki Kaisha Toshiba | Full-automatic washing machine with two drive motors |
| JP2002180409A (en) * | 2000-12-13 | 2002-06-26 | Taisei Rotec Corp | Water permeable block pavement and execution method of water permeable block pavement |
| CN1804241A (en) * | 2006-01-23 | 2006-07-19 | 太原电力高等专科学校 | Static load test device for composite foundation |
| CN101545841A (en) * | 2008-03-25 | 2009-09-30 | 四川升拓检测技术有限责任公司 | Method and device for falling-sphere spot testing of mechanics characteristics of rock and soil materials |
| CN101546006A (en) * | 2008-03-28 | 2009-09-30 | 富士胶片株式会社 | Color filter slice, method for manufacturing the same and liquid crystal display device |
| CN101650286A (en) * | 2009-08-26 | 2010-02-17 | 中冶集团武汉勘察研究院有限公司 | Bedding coefficient testing method |
| CN101691724A (en) * | 2009-09-17 | 2010-04-07 | 西南交通大学 | Liquefied soil foundation quake-proof road-bridge transition section structure of ballastless track of high-speed railway |
| JP2010170890A (en) * | 2009-01-23 | 2010-08-05 | Yazaki Corp | Fusible link |
| CN103134749A (en) * | 2013-02-02 | 2013-06-05 | 西南交通大学 | Foundation coefficient K30 test method of railroad bed for fine-grained soil construction |
| CN104697877A (en) * | 2015-02-11 | 2015-06-10 | 中铁第五勘察设计院集团有限公司 | Method for automatically checking foundation coefficient tester |
| CN204530798U (en) * | 2015-02-11 | 2015-08-05 | 中铁第五勘察设计院集团有限公司 | For pressure meter and the coefficient of subgrade reaction tester of coefficient of subgrade reaction tester |
| CN105181498A (en) * | 2015-09-08 | 2015-12-23 | 中山大学 | Simple instrument method for test of internal stress of soil mass under cyclic loading |
| CN205557609U (en) * | 2016-04-29 | 2016-09-07 | 湖南科技大学 | Adopt water tank for piling deep dull and stereotyped loading test device that carries device |
| CN107165203A (en) * | 2017-04-28 | 2017-09-15 | 浙江科技学院 | The method of testing of single-pile vertical orientation static test under the conditions of a kind of stable artesian water |
| CN107345395A (en) * | 2017-08-31 | 2017-11-14 | 甘肃中建市政工程勘察设计研究院 | A kind of plate apparatus and method for simulating side load |
| CN208297259U (en) * | 2018-05-22 | 2018-12-28 | 西南交通大学 | A kind of coefficient of subgrade reaction K of sand-filled subgrade30Correction test device |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20030175342A1 (en) * | 2002-03-14 | 2003-09-18 | Karl Kolter | Coated pharmaceutical single-unit delayed-release forms, based on polyvinyl acetate |
-
2018
- 2018-05-22 CN CN201810492416.8A patent/CN108760517B/en active Active
Patent Citations (18)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| BE647687A (en) * | 1963-05-09 | 1964-11-09 | ||
| CN1127902A (en) * | 1994-12-01 | 1996-07-31 | 卡西欧计算机公司 | Computers with a proof function |
| EP0947622A2 (en) * | 1998-03-31 | 1999-10-06 | Kabushiki Kaisha Toshiba | Full-automatic washing machine with two drive motors |
| JP2002180409A (en) * | 2000-12-13 | 2002-06-26 | Taisei Rotec Corp | Water permeable block pavement and execution method of water permeable block pavement |
| CN1804241A (en) * | 2006-01-23 | 2006-07-19 | 太原电力高等专科学校 | Static load test device for composite foundation |
| CN101545841A (en) * | 2008-03-25 | 2009-09-30 | 四川升拓检测技术有限责任公司 | Method and device for falling-sphere spot testing of mechanics characteristics of rock and soil materials |
| CN101546006A (en) * | 2008-03-28 | 2009-09-30 | 富士胶片株式会社 | Color filter slice, method for manufacturing the same and liquid crystal display device |
| JP2010170890A (en) * | 2009-01-23 | 2010-08-05 | Yazaki Corp | Fusible link |
| CN101650286A (en) * | 2009-08-26 | 2010-02-17 | 中冶集团武汉勘察研究院有限公司 | Bedding coefficient testing method |
| CN101691724A (en) * | 2009-09-17 | 2010-04-07 | 西南交通大学 | Liquefied soil foundation quake-proof road-bridge transition section structure of ballastless track of high-speed railway |
| CN103134749A (en) * | 2013-02-02 | 2013-06-05 | 西南交通大学 | Foundation coefficient K30 test method of railroad bed for fine-grained soil construction |
| CN104697877A (en) * | 2015-02-11 | 2015-06-10 | 中铁第五勘察设计院集团有限公司 | Method for automatically checking foundation coefficient tester |
| CN204530798U (en) * | 2015-02-11 | 2015-08-05 | 中铁第五勘察设计院集团有限公司 | For pressure meter and the coefficient of subgrade reaction tester of coefficient of subgrade reaction tester |
| CN105181498A (en) * | 2015-09-08 | 2015-12-23 | 中山大学 | Simple instrument method for test of internal stress of soil mass under cyclic loading |
| CN205557609U (en) * | 2016-04-29 | 2016-09-07 | 湖南科技大学 | Adopt water tank for piling deep dull and stereotyped loading test device that carries device |
| CN107165203A (en) * | 2017-04-28 | 2017-09-15 | 浙江科技学院 | The method of testing of single-pile vertical orientation static test under the conditions of a kind of stable artesian water |
| CN107345395A (en) * | 2017-08-31 | 2017-11-14 | 甘肃中建市政工程勘察设计研究院 | A kind of plate apparatus and method for simulating side load |
| CN208297259U (en) * | 2018-05-22 | 2018-12-28 | 西南交通大学 | A kind of coefficient of subgrade reaction K of sand-filled subgrade30Correction test device |
Non-Patent Citations (4)
| Title |
|---|
| Experimental research on centrifugal modeling test for bearing capacity and deformation behavior of shallow foundations;Luo Qiang;<Journal of Dalian University of Technology>;20160211;第55卷(第3期);298-304 * |
| High sodium and low potassium intake in patients with Type 2 diabetes;Ekinci E. I.;《DIABETIC MEDICINE》;20101201;第27卷(第12期);1401-1408 * |
| 粉细砂路基压实技术对比分析及压实质量检测技术研究;张猛;《中国优秀硕士学位论文全文数据库 工程科技II辑》;20180816(第9期);1-101 * |
| 高速铁路无砟轨道陡坡路基桩板墙侧向位移的影响分析;吴江;《铁道科学与工程学报》;20180316;第15卷(第3期);567-573 * |
Also Published As
| Publication number | Publication date |
|---|---|
| CN108760517A (en) | 2018-11-06 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN108760517B (en) | Foundation coefficient K of sand-filled roadbed30Correction test device and test method thereof | |
| US10815631B1 (en) | Method for cemented material dam construction based on whole-process quality control | |
| CN107543775B (en) | Method for determining rockfill material filling index and detecting field filling quality based on fractal theory | |
| CN104020063B (en) | A kind of measure the method for geotechnical filling accumulated deformation state load threshold value under cyclic load | |
| CN105113555A (en) | Reinforced earth retaining wall model test apparatus and method | |
| CN109839497B (en) | Indoor calibration device and calibration method for medium and coarse particle filler compaction detection depth | |
| CN110939043B (en) | Rapid detection method for compaction quality of soil-rock mixed filling roadbed | |
| KR101103267B1 (en) | The loading plate of flexible membrane and the device and the method thereof | |
| CN108570909B (en) | Filling and compacting method for fine sand roadbed | |
| CN208297259U (en) | A kind of coefficient of subgrade reaction K of sand-filled subgrade30Correction test device | |
| CN106400689A (en) | Sealed water bag prepressing construction technology | |
| CN105893688A (en) | Performance-based drainage type asphalt stabilized macadam mixture ratio design method | |
| CN111380778A (en) | On-site relative density testing method for soil material | |
| CN104988884A (en) | Concrete faced rock-fill dam void deformation monitoring device and installation method thereof | |
| US20220089201A1 (en) | Monitoring device for internal deformation and fine particle loss of railway subgrade | |
| CN110106893A (en) | A method of auxiliary roadbed, dam embankment operation | |
| Mokwa et al. | Laboratory testing of soil using the Superpave gyratory compactor | |
| Indraratna et al. | State of the art large scale testing of ballast | |
| CN112227432A (en) | Bearing capacity test device and test method for pile foundation in soft soil during vibration subsidence | |
| CN111622202A (en) | Method for filling and detecting boulder by dynamic compaction | |
| CN103134749A (en) | Foundation coefficient K30 test method of railroad bed for fine-grained soil construction | |
| CN214250953U (en) | Layering subsides mark for centrifugal model test | |
| CN211523298U (en) | Grouting monitoring device | |
| CN112730819B (en) | Indoor test method for obtaining relation between compaction deformation and CBR | |
| CN112030934B (en) | Anti-liquefaction treatment method for liquefiable foundation |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |