CN87102685A - The sensor deep hole is installed directional earth-filling method and device - Google Patents

Abstract

A kind of deep hole sensor installation directional earth-filling method and device.The present invention links orientor and backfilling apparatus to be that one, the method and apparatus of backfill are with a round steel cylinder with gong, its upper end has a gas transmission joint to link to each other with air compressor machine with flexible pipe, and a microscler breach is opened in order to draw the signal transmission line of sensor in the lower end.Its employing is native fully, sensor is pre-buried, it is directed to cut in soil, the hole.Methods such as air pressure backfill.The present device cost is low, and is easy to use, solved underground and bury the directional earth-filling problem of sensor under water underground.Improved the correctness of native measured value.

Description

The invention belongs to rock-soil engineering in-situ measuring technology and equipment.

When measuring soil stress or strain in position, result who often draws and theoretical value more be not less than normal be exactly higher, perhaps the result extremely disperses, though cause this result's reason a lot, one of them very important reasons be exactly since directed inaccurate He Hui ?be not good at caused.

Be example with the stress box now, we know after the stress box is imbedded in the soil, reach the medium coupling, just must make boring on every side undisturbed soil Ji Hui ?soil all satisfy and draw close equation:

Require the E of undisturbed soil around the boring in other words, ν, G He Hui ?the E of soil, ν, G is identical, obviously, this is difficult to do.So when design soil stress box, all be to adopt under unmatched situation, the relative error when seeking to lose coupling.

Adopt as subiculum tieed up the strange formula of setting up more in the design of soil stress box at present:

$\frac{\mathrm{\Delta \rho o}}{\mathrm{\rho o}}=\frac{\mathrm{1-}\frac{\mathrm{Es}}{\mathrm{Eg}}}{\frac{{\mathrm{\pi (1-v}}^2)}{4}\frac{D}{H}+\frac{E_s}{E_g}}$

Eg is the bullet mould of stress box in the formula, and Es is the bullet mould of soil.

As can be seen from the above equation, in order to find out the relative error of measured value, just should make back ?the E value of the soil Es value of undisturbed soil on every side that equals to hole, otherwise following formula just cannot be used.Past hole at the scene in during the erection stress box, have no idea to reach this point, then cannot carry out especially as for erection stress box in the boring under water.

Bury the soil stress box at present at the scene underground, often adopt borehole for the stress box of shallow embedding after the manual zoning return ?, in ground surface works (as earth dam), bury underground, then be to divide layer to return a ?with project progress.Like this some Hui ?, if do carefully, generally also can satisfy the demand.But in boring (particularly deep hole) when burying the stress box underground, particularly bury underground in the boring under water, reach around the above-mentioned boring undisturbed soil Yu Hui ?identical this requirement of E value of soil, that is difficult to do.For example Fig. 1 buries the stress box underground 3. the time in clay boring 1. because 4. clay always becomes block, so Zai Hui ?the inside of soil, between soil block and the soil block, will exist the gap, contacting between soil block and the stress box also can not complete driving fit.As shown in Figure 1.This situation generally all be soil block is smashed to pieces Cheng Xiao Kuai ?behind the hand-hole, layering is carefully tamped with wooden stick or other fullering tool.In order to be unlikely to have influence on the initialization point of sensor, so just can not cross greatly firmly compacting owing to tamping force.Owing to these reasons, in deep hole, bury the stress box in this way underground, require to eliminate back ?the soil soil block inner and and soil stress box surface of contact between hole and Shi Hui ?soil reach and native same state on every side, that is difficult to accomplish.Therefore when soil pressure or stress wave activity this soft De Hui ?on the soil time, with regard to some energy be used for Ya Suo Hui ?soil and Bei Hui ?soil absorb, be subjected to very big destruction with regard to the accuracy that makes measurement parameter like this, even cause manifestation of dishonesty.Hole under water in this way Zhong Hui ?mud then more difficult, even Jiang Hui ?material do into mud and no Fa Hui ?.

Past in boring, bury underground the stress box have minority unit once adopted below De Hui ?method (promptly according to boring size prick a steel reinforcement cage with fine steel rib, then the stress box is fixed on the steel reinforcement cage, the extension line of stress box also is banded on the steel reinforcement cage, put into the desired location in hole, then Jiang Hui ?soil use pressurized air, spray in the hole together with soil, gas, will fill up inside and outside the steel reinforcement cage.Adopt this method except operating procedure complexity and apparatus expensive, more main still since the existence meeting disturbance stress field of steel reinforcement cage and being difficult to reach above-mentioned De Hui ?with the coupling requirement of undisturbed soil around the boring, as unit weight and water cut etc.

Through consulting patent, technical information all do not find back ?the data of this respect.

The invention provides a kind of sensor deep hole install Ding Xiang Hui ?method and apparatus, this device solves Hui ?soil and the matching problem of undisturbed soil around the boring, solved the awl under water that at all can't carry out in the past bury underground sensor boring Hui ?problem, realize whole device of the present invention as shown in Figure 2.Orientor Yu Hui ?device link with gong and be one, it is by transmitting tuning bar (1), compressed air inlet (2), air hose (3), orientor (4) ， Hui ?device (5), boring (6), pilot lamp (7), hummer (8) is formed.

Orientor with fixing sieve silk be fixed on back ?the upper end of device, the orientor other end and tuning bar link with gong and connect, directing controller is to utilize the directive property of needle and photovoltaic principals to develop, as shown in Figure 3, at first on the ground with the required orientation of sensor alignment (as pointing to the quick-fried heart), regulate small electric bulb orifice plate (1) and photoelectric tube (2) then, make it on a vertical curve, at this moment light path is cut off by needle (3), photoelectric tube is in cut-off state, amplifying circuit also is in cut-off state, and output current is zero substantially.Relay disconnects, and red light is bright, and hummer sends tweeting sound simultaneously, and the preset of expression direction finder finishes.When return ?device and tuning bar when putting into the boring depths angle change, adjust the tuning bar again and send signal until hummer, can illustrate that sensor is tuned to preposition.

Hui ?device as shown in Figure 4 ， Hui ?device be that 5. the round steel tube is installed in directing controller below 1., its external diameter can design according to bore diameter, should be more smaller than bore diameter, Yi Hui ?device can freedom get final product up and down.2. be to carry compressed-air actuated flexible pipe, the last termination of flexible pipe is air compressor machine or pneumatic accumulator 1., 2. the gas transmission joint that terminates at go back to ?device top is down gone up, and 6. is returning the microscler breach that open ?device lower end, uses in order to the signal transmission line of drawing sensor.

As shown in Figure 5, the soil that will take out from boring 4., water-content indicator according to undisturbed soil prepares, and it is contained in the container, installs to the position of dotted line among the figure, compacting then, make its unit weight and undisturbed soil approaching, put into sensor more 2., carefully put signal transmission line well 1., and then continue soil packed into and reach a certain height, again with earth rammer to state near undisturbed soil.

After hours above-mentioned, see Fig. 6-1., can Jiang Hui ?device 5. aim in the soil container sensor position 3. cut carefully soil 4. in, make output line 1. aim at back ?the device lower end breach 6., note being sure not to cut output lead, shown in Fig. 6-1..Remove back then ? soil around the device, take out back carefully ?device, after the taking-up De Hui ?device shown in Fig. 6-2..

See shown in Fig. 7-1.; with install soil and sensor 3. De Hui ?device gas transmission joint 5. 7. 2. connect with gas piping; protect signal transmission line 1. Jiang Hui ?device 5. put into carefully boring 6. direct reach boring the bottom; rotation tuning bar 9.; sensor is transferred to orientation required when installing; arrest the tuning bar then and 9. and downwards impose the pressure that earth pillar can be released; valve that opens air compressor machine more lentamente Xiang Hui ?device the upper cavity injecting compressed air 8.; the pressure that puts on the cavity top when air is when manually putting on 9. pressure of tuning bar; be about to back ?device jack-up upwards slowly; while promotes time ?soil in the tube downwards; return ?soil under the effect of upper air pressure, extrude downwards outside the tube on the limit, and the soil that is extruded simultaneously is radially expanded and closely compresses hole wall; shown in Fig. 7-2., repeat said process up to Zuan Kong ?full till.

Method and apparatus provided by the present invention, solve Hui ?with the matching problem of awl undisturbed soil, the relative error of finding out measured value that can be correct, and bearing portion He Hui ?department join together, thereby improved the correctness of measured value, solved the underwater drilling that at all can't carry out in the past bury underground sensor boring Hui ?problem, the present device cost is low, easy to use, be easy to apply.

Claims (2)

1, a kind of directional earth-filling method of deep hole sensor installation and device, feature of the present invention is, orientor and backfilling apparatus link with gong and are one, orientor is fixed on the upper end of backfiller with sieve silk, the other end of orientor and tuning bar link with gong and connect, backfiller is with a round steel cylinder (5), its upper end has a gas transmission joint (3) to join with carrying compressed-air actuated flexible pipe (2), another termination air compressor machine of flexible pipe (2), a microscler breach is opened in the lower end of circular steel cylinder, in order to draw the signal transmission line of sensor, the method of backfill is, at first use a soil container (2), the soil (4) that will take out from boring prepares according to the water-content indicator of undisturbed soil, contain in the container, put into sensor again, soil packed into reach a certain height, then backfiller (5) is aimed in the position incision soil (4) of sensor in the soil container (2), make output line (1) aim at the breach (6) of backfiller lower end, take out backfiller again, the gas transmission joint (7) that will install the backfiller (5) of soil (10) and sensor (3) connects with air hose (2), backfiller (5) is put into the bottom of boring (6), rotation tuning bar (9), the orientation when sensor is transferred to installation.Arrest tuning bar (9) then and impose the pressure that earth pillar can be released downwards, open the valve of air compressor machine more lentamente, upper cavity injecting compressed air (8) to backfiller, the pressure that puts on the cavity top when air is when manually putting on the pressure of tuning bar (9), be about to slowly jack-up upwards of backfiller (5), promote the backfill soil (10) in the round steel cylinder simultaneously downwards, backfill soil is under the effect of upper air pressure, extrude downwards outside the tube on the limit, and the soil that is extruded simultaneously is radially expanded and closely compresses hole wall.Repeat said process, till boring is filled up.

According to claim 1 described earth-filling method and device, it is characterized in that 2, the soil (4) that will take out prepares according to the water-content indicator of undisturbed soil earlier, puts into soil container (2), installs to the position of dotted line among the figure, then compacting from boring.Put into sensor (3) and signal transmission line (1) again, in continuation soil being packed into then reach a certain height, again with the state of earth rammer to undisturbed soil.

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