CN2288416Y - Fast measurer for roadbed compactedness - Google Patents

Abstract

The utility model relates to a fast measurer for lossless measure of roadbed compaction degree. The purpose is that the utility model rapidly and exactly measures the roadbed compaction degree in a lossless mode and provides a measuring instrument for analysing machinery electron. An acceleration sensor 3 is assembled in a hammer body 1 through a vibration isolation pad 2, and the hammer body 1 can move up and down. The hammer body 1 is assembled in a sliding device, and a spacing device is assembled on a machine base 15 and controls the lifting and the free falling movement of the hammer body 1. The utility model has the advantages that an applicant finds S-G backwater frequency, and an impulse response value is only the single function of the compaction degree. The utility model provides a theoretical basis and develops out a manual and machinery measuring instrument. The devices are various, and the operation is practical, convenient and reliable on site.

Description

The Subgrade Compaction rapid measurement device

The utility model relates to a kind of device of non-destructive determination Subgrade Compaction, and basic compactness rapid measurement device especially shows the way.

In background technology, the Subgrade Compaction detection mode is divided two kinds of static test and dynamic tests.Basically still continue to use classic old way at present both at home and abroad, it is the cutting ring sampling method, this method is with the cutting ring sampling of digging pit, measure wet density, the deduction moisture content get dry density, compare with maximum dry density, obtain the actual compactness k value of roadbed, its weak point be time-consuming, take a lot of work and diminish shortcomings such as roadbed, road surface because of digging pit, also have a kind of filling micromicrofarad, its shortcoming is the same.Have multiple roadbed, pavement compaction degree automatic detection instrument---gamma-rays method both at home and abroad, and the nucleon density instrument is arranged and be installed in the instrument that utilizes certain vibration parameters to detect compactness on the vibroll, but the compactness of the above-mentioned gamma-radiation method fast measuring soil body, but people have the feared state of mind to ray, next costs an arm and a leg, so seldom adopt.Above-mentioned Other Instruments is not all considered the influence of the water cut of soil to compactness, belongs to wet density and measures, and perhaps is called observational measurement.

How developing the damaged instrument of measuring Subgrade Compaction of a kind of quick nothing, is the needs of current highway construction situation, also is the inexorable trend of Subgrade Compaction fast-field evaluation technical development.

The purpose of this utility model is the weak point that overcomes in the above-mentioned background technology, develops a kind of Subgrade Compaction rapid measurement device of dynamic down quantitative measurment, reaches quicker, not damaged, accurately measures the purpose of Subgrade Compaction.

Technical solution of the present utility model is as follows:

Because when vibratory impulse detects Subgrade Compaction, the highest about 1000HZ of the radio-frequency component of shock response signal, usually in this frequency range, the response a and the Subgrade Compaction k of vibration, W is relevant for soil body water cut, be a=f (kw), the applicant is through test many times, there is the water frequency range that stagnates in discovery in this frequency range, be named as the S-G low frequency water frequency range that stagnates, in this frequency range, roadbed vibratory response value is almost irrelevant with the water cut of soil, and a of vibratory response value like this and compactness k become single function, this discovery, also belong to initiative in the world, have very high science and engineering Practical significance.The utility model is based upon on this discovery and develops, and its design feature is described as follows:

Comprise acceleration transducer 3, be characterized in, can mention in the hammer body 1 with freely falling body, acceleration sensor 3 with the stagnant frequency range response α of vibration isolator 2 alignment measurement S-G low frequency water, make mechanical filtering and Insulation Coordination, hammer body 1 is assemblied in the up and down carriage, and the stop means control hammer body 1 of assembling on the support 15 is mentioned and carried out compactness with freely falling body and measure.

Technical solution of the present utility model also comprises:

Can slide up and down in the device, hammer axle 6 lower ends assembling hammer body 1, hammer axle 6 middle part assembling and positioning rings, arm 5 are done manually with stop means, mechanical positioning and freely falling body cooperate, fixing slide cartridge is two ends pulley base 8 assembling elastic guide pulleys 7 about in the of 9, and hammer axle 6 is artificial by slide cartridge 9 works, mechanical position limitation promotes and cooperates.

Can slide up and down in the device, assembling hammer body 1 in the pulley yoke 36, leading block 7 on the pulley yoke 36 is done to lead up and down to cooperate with guide frame 37, and pulley yoke 36 does dynamo-electric location with stop means and freely falling body cooperates, and the lifting rope 38 usefulness Electric Machine Control on the pulley yoke 36 are done spacing lifting and cooperated.

In stop means, pass through backstay 14 in the guide groove of fixing on the support 15 11, but assemble back-moving spring 13 on the backstay 14 of move left and right, and the manual control of hinged operating rod 16 dos hammer body 1 freely falling body carries out Subgrade Compaction measurement cooperation, composition hand push type stop means.

In stop means, on the support 15 fixedly 21 usefulness pins, 12 assembling and positioning 20, fixing assemble back-moving spring 13 to 21 with locating between 20, the location is carried out the locating ring on 20 1 ends and the hammer axle 6, the manual control of arm 5 dos hammer body 1 freely falling body the Subgrade Compaction measurement and is cooperated, and forms hand vice formula stop means.

In stop means, trailing wheel 34 drive sprockets 24 on the car body 35 drive ratchet 26 and rotate, make mechanical lifting and freely falling body with coaxial shift fork 27 ends of ratchet 26 and locating ring, arm 5 on the hammer axle 6 and carry out Subgrade Compaction measurements and cooperates, composition rotates the dial type stop means.

In stop means, the travel switch up and down 40 of assembling in the guide frame 37 carries out the Subgrade Compaction measurement with lifting of stroke signal receiver do and freely falling body in the pulley yoke 36 and cooperates, and forms the stroke type stop means.

Description of drawings of the present utility model is as follows:

Fig. 1 is manual structure principle chart.

Fig. 2 is Fig. 1 work on the spot schematic diagram.

Fig. 3 is a hand vice formula stop means structure principle chart.

Fig. 4 is an A-A cut-open view among Fig. 3.

Fig. 5 is a B-B cut-open view among Fig. 3.

Fig. 6 is Fig. 3 work on the spot schematic diagram.

Fig. 7 is a rotation dial type stop means structure principle chart.

Fig. 8 is Fig. 7 work on the spot schematic diagram.

Fig. 9 is a stroke type stop means structure principle chart.

Figure 10 is the left view of Fig. 9.

Figure 11 is Fig. 9 work on the spot schematic diagram.

Figure 12 is the auto-power spectrum G and the frequency HZ coordinate figure of shock response.

Above-mentioned number in the figure is described as follows:

The 1-hammer body, 2-vibration isolator, 3-acceleration transducer, 4-lock-screw, the 5-locating ring, arm, 6-are hammered axle, 7-leading block, 8-pulley base into shape, the 9-slide cartridge, 10-supporting leg seat, 11-guide groove, 12-pin, the 13-spring, 14-backstay, 15-support, 16-operating rod, 17-screw, 18-control knob, 19-A-frame, 20-are located handle, fixing of 21-, the 22-handgrip, 23-hammers wheel into shape, the 24-sprocket wheel, 25-driving-chain, 26-ratchet, the 27-shift fork, 28-shift fork roller, 29-shift fork seat, the 30-motor, 31-Subgrade Compaction fast measuring instrument, 32-chain-wheel box, the 33-deflecting roller, 34-trailing wheel, 35-car body, the 36-pulley yoke, 37-guide frame, 38-lifting rope, the 39-pulley, 40-travel switch, 41 one stroke rotational speed governors.

Be that the utility model adjoint is described in further detail below: referring to Fig. 1, hammer axle 6 middle part stationary positioned rings 5, the lower end is hammer body 1 fixedly, with vibration isolator 2 assembling acceleration sensors 3, play mechanical filter action in the hammer body 1, the above signal of filtering 300HZ, this is one of characteristics of the present utility model, next plays insulating effect, and vibration isolator 2 can be used three-ply board sheet material or rubber blanket, or ox hair felt pan etc. is made.Fixing slide cartridge 9 on the supporting leg seat 10, assembling elastic guide pulleys 7 in the pulley base 8 at slide cartridge two ends about in the of 9 and cooperate as positioning and guiding by the hammer axle in the slide cartridge 96, and hammer axle 6 upper ends have one to carry handle, so that artificial lifting.The operating rod 16 that on support 15, can stir with pin 12 assemblings, the backstay 14 that 12 assemblings of operating rod 16 usefulness pins can be stirred, assembling spring 13 on the backstay 14, and do the back freely falling body measurement of certain distance location by the locating ring 5 on guide groove 11 and the hammer axle 6 and cooperate, operating rod 16 upper end control knobs 18 are by manual action control, and whole hand gear is second characteristic of the present utility model.

Referring to Fig. 2, in working at the scene, device is assemblied on the A-frame 19 among Fig. 1, and where Subgrade Compaction is carried out in manually-operated is measured fast but walk.

Referring to Fig. 3～Fig. 6, its basic structure is with Fig. 1 and Fig. 2, institute's difference is that stop means is the hand vice formulas, fix 21 usefulness pins, 12 assembling and positioning on the support 15 20, spring 13 is arranged between two, the location does that certain distance is located to 20 end arcwall faces and the locating ring 5 on the hammer spools 6 and freely falling body carries out Subgrade Compaction and measures fast and cooperate, fixingly the dog screw on 21 " regulate the location and do location dynamics cooperation to 20; all be with handgrip 22 on two so that manually-operated, this is the 3rd characteristics of the present utility model.

Referring to Fig. 7 and Fig. 8, hammer axle 6 moves up and down along leading block 7, and hammer axle 6 lower end lock screws 4 are hammer body 1 fixedly, and with vibration isolator 2 assembling acceleration transducers 3, hammer body 1 lower end assembling hammer takes turns 23, so that car body work measurement value in advancing is unaffected on the hammer body 1.The trailing wheel 34 coaxial assembling sprocket wheels 24 of going up of car body 35, car body 35 is walked about, driving sprocket wheel 24 rotates, sprocket wheel 24 usefulness driving-chains 25 drive ratchet 26 and rotate, coaxial shift fork seat 29 rotates thereupon, and the shift fork 27 ends assembling roller 28 on the shift fork seat 29 does to promote with the registration arm 5 on the hammer axle 6 and freely falling body cooperates.Assembling chain-wheel box 32 on the car body 35, analyzer 31 and deflecting roller 33, trailing wheel 34.This car body mechanical measuring device is the 4th characteristics of the present utility model.

Referring to Fig. 9～Figure 11, basic structure is with shown in Figure 8, difference is that stop means is the Electromechanical Control formula, pulley yoke 36 by having leading block 7 in the guide frame 37 on the car body 35, assembling hammer body 1 in the pulley yoke 36, vibration isolator 2 and acceleration transducer 3, pulley yoke 36 upper end lifting ropes 38 link to each other with the motor-driven reciprocating apparatus through pulley 39, do back and forth to promote to cooperate, travel switch 40 on the guide frame 37 is for setting certain distance, travel switch 40 is contact switches or is optoelectronic switch, make set a distance stroke reciprocal cooperation with acknowledgement signal mechanism in the pulley yoke 36, the controller 41 on the guide frame 37 is made the stroke rotating speed and is cooperated.The measurement mechanism of the dynamo-electric photocontrol of this usefulness is the 5th characteristics of the present utility model.

Referring to Figure 12, ordinate is the auto-power spectrum G of shock response, and abscissa is frequency HZ, and each curve is that different moisture content W response is compiled in the S-G frequency range among the figure, show: at certain low frequency range, under the same compactness, the soil body of different moisture content, shock response curve contain and gather in a place, in this is called the stagnant frequency band of S-G water, the influence of moisture content impact response value is very little, as experiment showed, that the stagnant effect of the water frequency of loess is 5～12HZ of low frequency range.The applicant has disclosed such fact through a large amount of tests, i.e. shock response value only is the single function of compactness.This has just laid theoretical foundation for the utility model carries out the measurement of Subgrade Compaction rapidity.

Advantage of the present utility model and effect are as follows:

1, because having found roadbed shock response value, the applicant in S-G water stagnates frequency range, only is the list of compactness One function, institute thinks that the utility model is quick, accurate, the noninvasive measurement roadbed provides theoretical foundation.

2, the utility model need not to detect water content in the soil during mensuration in S-G water stagnates the low-frequency range measurement, Reduced a large amount of man power and materials. The utility model adopts the above signal of vibration isolator elimination 300HZ in addition, Improved the resolution ratio that compactness detects.

3, finding speed is fast, and increasing work efficiency than general classical approach reaches 20～30 times, this transient impact Method is a kind of compactness assay method that has creativity and attraction most both at home and abroad at present.

4, because the utility model adopts manual measurement and mechanical measurement, thus structurally flexible and changeable, Not only can measure at free from worry roadbed, but also measure at the scene in the operation can be in area, road corner, The joint area on bridge and road, and other tang measures, the utility model transportation, easy to carry, Simple to operate, practicality is good, for technical staff and workman provide convenient and reliable measuring instrument.

Claims (7)

1, Subgrade Compaction rapid measurement device, comprise acceleration transducer (3), it is characterized in that: can mention in the hammer body (1) with freely falling body, acceleration sensor (3) with the stagnant frequency range response α of vibration isolator (2) alignment measurement S-G low frequency water, hammer body (1) is assemblied in the up and down carriage, and support (15) is gone up the stop means of assembling control hammer body (1).

2, Subgrade Compaction rapid measurement device according to claim 1, it is characterized in that: can slide up and down in the device, hammer axle (6) lower end assembling hammer body (1), that hammer axle (a 6) middle part assembling and positioning ring, arm (5) and stop means are done is artificial, mechanical positioning and freely falling body cooperate, and fixing slide cartridge (9) two ends up and down uses pulley base (8) to assemble elastic guide pulley (7).

3, Subgrade Compaction rapid measurement device according to claim 1, it is characterized in that: can slide up and down in the device, assembling hammer body (1) in the pulley yoke (36), leading block (7) on the pulley yoke (36) contacts with guide frame (37), pulley yoke (36) cooperates with stop means, and the lifting rope (38) on the pulley yoke (36) is connected with motor.

4, Subgrade Compaction rapid measurement device according to claim 1 and 2, it is characterized in that: in stop means, support (15) is gone up in the fixing guide groove (11) by backstay (14), but the backstay of move left and right (14) is gone up assembling back-moving spring (13), and hinged operating rod (16) is made manual engagement, composition hand push type stop means.

5, Subgrade Compaction rapid measurement device according to claim 1 and 2, it is characterized in that: in stop means, fixedly handle (21) on the support (15) uses pin (12) assembling and positioning (20), fixing (21) and location are assembling back-moving spring (13) between (20), the location is done manual engagement to (20) one ends and locating ring, arm (5) on the hammer axle (6), forms hand vice formula stop means.

6, Subgrade Compaction rapid measurement device according to claim 1 and 2, it is characterized in that: in stop means, trailing wheel (34) drive sprocket (24) on the car body (35) drives ratchet (26) and rotates, do mechanical the cooperation with shift fork (27) end that ratchet (26) is coaxial with locating ring, arm (5) on the hammer axle (6), form rotation dial type stop means.

7, according to claim 1 or 3 described Subgrade Compaction rapid measurement devices, it is characterized in that: in stop means, the travel switch up and down (40) of assembling in the guide frame (37) is done to cooperate with stroke signal receiver in the pulley yoke (36), forms the stroke type stop means.

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