CN202049091U - Portable detector for roadbed resilient modulus loading plate - Google Patents
Portable detector for roadbed resilient modulus loading plate Download PDFInfo
- Publication number
- CN202049091U CN202049091U CN2011200559826U CN201120055982U CN202049091U CN 202049091 U CN202049091 U CN 202049091U CN 2011200559826 U CN2011200559826 U CN 2011200559826U CN 201120055982 U CN201120055982 U CN 201120055982U CN 202049091 U CN202049091 U CN 202049091U
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- bracing frame
- lifting jack
- pressure head
- resilient modulus
- portable
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Abstract
The utility model provides a portable detector for a roadbed resilient modulus loading plate, which has simple structure and low cost, is convenient to operate and is used for lowering the labor intensity. The portable detector for the roadbed resilient modulus loading plate comprises a jack which is fixed at the bottom of a working vehicle frame; the top of the jack is hemispherical; both sides of the jack are fixed through a supporting frame, a soleplate is arranged at the middle part of the supporting frame; dial gauges are arranged at both sides of the supporting frame; and a pressing head is installed at the bottom of the supporting frame. The portable detector for the roadbed resilient modulus loading plate has simple structure and low cost, is convenient to operate and used for lowering labor intensity and can be flexibly applied to detecting rolling construction of roadbed soils, thereby ensuring the rolling construction quality of the roadbed soils.
Description
Technical field
The utility model relates to the road project field, relates to the subgrade and pavement modulus of resilience pick-up unit in the road construction specifically.
Background technology
The modulus of resilience is meant the ratio of its corresponding resilience strain of stress that roadbed, road surface and road-making material produce under load action, the soil matrix modulus of resilience represents that soil matrix is in elastic deformation in the stage, under the vertical load effect, the ability of opposing vertical deformation, if vertical load is a definite value, the bigger perpendicular displacement that then produces of soil matrix modulus of resilience value is just little; If vertical displacement is a definite value, modulus of resilience value is bigger, and then to bear the ability of external load effect just bigger for soil matrix, therefore, adopts the index of the modulus of resilience as soil matrix or ground surface material compressive strength in the subgrade and pavement design.
Unevenness at soil body particle in the roadbed particular fillers, the existing grinding compacting degree detection method of banketing often can't correctly be estimated the quality that rolls of subgrade soils, and adopting the modulus of resilience to detect is a kind of method that rolls requirement that whether satisfies of estimating inhomogeneous soil body particle diameter filling intensity.At present, what the existing pavement deflection conventional sense means of conventional sense method China adopted is that Beckman beam method, Falling Weight Deflectometer(are called for short FWD) the dynamic flexure on Falling Weight Deflectometer mensuration road surface, and the modulus of resilience method on inverse road surface etc.But these instrument and equipments are big, cost is higher, and dumb during operation, working strength is also bigger.
The utility model patent is for earthen backfill rolls a kind of device that quality is estimated detection to roadbed fast, easily.
Summary of the invention
Technical problem to be solved in the utility model is that the technical deficiency at above-mentioned existence provides a kind of simple in structure, cheap, easy to operate, reduces the portable subgrade resilient modulus load board detector of labor strength.
The utility model is to solve the problems of the technologies described above the technical scheme that is adopted to be: portable subgrade resilient modulus load board detector, it is characterized in that: include and be arranged at the lifting jack that is fixed on the operation bottom of frame, the top of lifting jack is that hemisphere is planar, the lifting jack both sides adopt bracing frame to fix, bracing frame is provided with base plate in the middle of the bottom, the bracing frame both sides are provided with clock gauge, and in the bracing frame bottom pressure head are housed.
In such scheme, described lifting jack is a hydraulic jack, and the lifting jack chassis plate is reserved with bolt hole, and lifting jack is by being bolted to the bottom of frame of Operation Van.
In such scheme, described bracing frame is that stainless steel is made, be reserved with the hole, garden that the voltage supply head passes in the middle of the base plate of bracing frame bottom, the periphery of base plate is provided with leveling foot bolt, circle spirit bubble, sets up dial indicators rack bar, dial indicators rack folder in the both sides in hole, garden correspondence.
In such scheme, described pressure head passes circular hole and is positioned on the ground, and pressure head is cylindrical, and the cylinder upper surface of pressure head is processed into the hemispherical pit that matches with jacking header.
In such scheme, the both sides of described pressure head are welded with the horizontal steel plate that clock gauge bar pin is supported in contour being used in position.
The beneficial effects of the utility model are: this portable subgrade resilient modulus load board detector is simple in structure, cheap, easy to operate, reduces labor strength, but flexible Application detects the roller compaction construction quality of assurance subgrade soils in the roller compaction construction of subgrade soils.
Description of drawings
Fig. 1 is the utility model example structure
Fig. 2 is the utility model embodiment jack structure front view
Fig. 3 is the utility model embodiment pressure head structure front view
Fig. 4 is the utility model embodiment pressure head structure vertical view
Among the figure: the 1-lifting jack, the 2-bracing frame, the 3-base plate, the 4-clock gauge, the 5-pressure head, the 6-bolt hole, the 7-circular hole,
The horizontal steel plate of 8-.
Embodiment
Below in conjunction with accompanying drawing the utility model is further described:
Portable subgrade resilient modulus load board detector as shown in Figure 1, include and be arranged at the lifting jack 1 that is fixed on the operation bottom of frame, the top of lifting jack 1 is that hemisphere is planar, lifting jack 1 both sides adopt bracing frame 2 fixing, be provided with base plate 3 in the middle of bracing frame 2 bottoms, both sides are provided with clock gauge 4, and in bracing frame 2 bottoms pressure head 5 are housed.
In the present embodiment, lifting jack 1 as shown in Figure 2 is a hydraulic jack, and lifting jack 1 chassis plate is reserved with the bolt hole 6 of 4 diameter 8～12mm, and lifting jack 1 is by being bolted to the bottom of frame of Operation Van.
In the present embodiment, described bracing frame 2 is made for stainless steel, be reserved with voltage supply 5 hole of passing, diameter 200mm garden 7 in the middle of the base plate 3 of bracing frame 2 bottoms, the periphery of base plate 3 is provided with leveling foot bolt, circle spirit bubble, sets up dial indicators rack bar, dial indicators rack folder in the both sides in hole, garden 7 correspondence.
In the present embodiment, pressure head 5 as shown in Figure 3 and Figure 4 passes circular hole 7 and is positioned on the ground, pressure head 5 is the cylindrical of top and bottom diameter 100mm (or 150mm), high 70mm, and the cylinder upper surface of pressure head 5 is processed into the hemispherical pit that matches with lifting jack 1 top, the both sides of pressure head 5 also are welded with the horizontal steel plate 8 that the wide 20mm of clock gauge 4 bar pin is supported in contour being used in position.
When using the utility model device, its detection step is:
(1) the lifting jack 1 usefulness bolt of the hydraulic type of special processing is fixed under the vehicle frame flexibly (can selects to be no more than the lifting jack of 2t top lift when detecting roadbed).
(2) carry out the roadbed position that elastic modulus detects at needs, leveling soil matrix surface, if there is the hole recessed, the fine sand of the dried and clean of must loosing is filled and led up the soil matrix recess, sand can not cover whole soil matrixs surface and avoid forming one deck.
(3) on soil matrix, put the bracing frame 2 of reisilometer, and with foot bolt leveling bracing frame 2 planes.
(4) put pressure head 5 on the soil matrixs of leaving a blank in advance in the middle of bracing frame 2, symmetry places 2 clock gauges 4 on bracing frame 2 then, and the compression travel that makes every clock gauge 4 is about about 8～15 mm.
(5) with lifting jack 1 on pressure head 5 on-load pressure to 100kPa, and voltage stabilizing 1min, beginning to be offloaded to pressure gauge reading is 0.
(6) then, on pressure head, exert pressure continuously, when pressure 1 Mpa≤P≤1.3 Mpa, stop pressurization and voltage stabilizing 1min, and write down the loading stroke reading of on-load pressure P and every clock gauge 4 with the speed of 0.2～0.3Mpa/s.
It is 0 that speed when (7) lifting jack 1 beginning is with loading is offloaded to the tensimeter number of degrees, notes the end readout of every the clock gauge in lifting jack 1 unloading back once more.
(8) calculate pressure head 5 springback capacity L(clock gauges and load the average end readout of average reading-unload), utilize following formula to try to achieve modulus of resilience value:
Ep=2πPR?(1-μ2)/4L
Wherein: the Ep--modulus of resilience, kPa;
Unit pressure on the P--loading plate, kPa;
R--loading plate radius, 75mm;
The average springback capacity of the actual measurement of L-pressure head, mm;
μ--the Poisson ratio of soil gets 0.35.
Claims (5)
1. portable subgrade resilient modulus load board detector, it is characterized in that: include and be arranged at the lifting jack that is fixed on the operation bottom of frame, the top of lifting jack is that hemisphere is planar, the lifting jack both sides adopt bracing frame to fix, bracing frame is provided with base plate in the middle of the bottom, the bracing frame both sides are provided with clock gauge, and in the bracing frame bottom pressure head are housed.
2. portable subgrade resilient modulus load board detector as claimed in claim 1, it is characterized in that: described lifting jack is a hydraulic jack, and the lifting jack chassis plate is reserved with bolt hole, lifting jack is by being bolted to the bottom of frame of Operation Van.
3. portable subgrade resilient modulus load board detector as claimed in claim 1, it is characterized in that: described bracing frame is that stainless steel is made, be reserved with the hole, garden that the voltage supply head passes in the middle of the base plate of bracing frame bottom, the periphery of base plate is provided with leveling foot bolt, circle spirit bubble, sets up dial indicators rack bar, dial indicators rack folder in the both sides in hole, garden correspondence.
4. portable subgrade resilient modulus load board detector as claimed in claim 1, it is characterized in that: described pressure head passes circular hole and is positioned on the ground, pressure head is cylindrical, and the cylinder upper surface of pressure head is processed into the hemispherical pit that matches with jacking header.
5. as claim 1 or 4 described portable subgrade resilient modulus load board detectors, it is characterized in that: the both sides of described pressure head are welded with the horizontal steel plate that clock gauge bar pin is supported in contour being used in position.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011200559826U CN202049091U (en) | 2011-03-07 | 2011-03-07 | Portable detector for roadbed resilient modulus loading plate |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011200559826U CN202049091U (en) | 2011-03-07 | 2011-03-07 | Portable detector for roadbed resilient modulus loading plate |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202049091U true CN202049091U (en) | 2011-11-23 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2011200559826U Expired - Fee Related CN202049091U (en) | 2011-03-07 | 2011-03-07 | Portable detector for roadbed resilient modulus loading plate |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202049091U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110082235A (en) * | 2019-05-05 | 2019-08-02 | 同济大学 | New causeway road Modulus Test Method and system based on hemi-spherical indenter loading plate |
| CN111965060A (en) * | 2020-08-03 | 2020-11-20 | 河海大学 | Press-in type on-site modulus of resilience measuring device |
-
2011
- 2011-03-07 CN CN2011200559826U patent/CN202049091U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110082235A (en) * | 2019-05-05 | 2019-08-02 | 同济大学 | New causeway road Modulus Test Method and system based on hemi-spherical indenter loading plate |
| CN111965060A (en) * | 2020-08-03 | 2020-11-20 | 河海大学 | Press-in type on-site modulus of resilience measuring device |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20111123 Termination date: 20150307 |
|
| EXPY | Termination of patent right or utility model |