CN2379798Y - Instrument for automatically monitoring quality of concreted pile - Google Patents

Abstract

The utility model relates to an instrument for automatically monitoring the quality of a concreted pile, which is provided with an SCM and a peripheral circuit thereof, a keyboard, a display, a printer, two pressure sensors, two low-pass amplifiers, a subtracter, an alarm circuit and a calendar / clock circuit. The two pressure sensors arranged on a guide pipe to fill the mixture into a formed hole switch the sludge pressure or the mixture pressure into an electric signal which is sent to the SCM to make the data acquisition after magnified to obtain the absolute pressure of two points, and simultaneously the subtractor is utilized to work out the difference of the signals of two ways to provide the pressure difference data to the SCM to indicate whether embedded position of the guide pipe in the mixture is safe at any time to prevent the quality accidents happening, such as pile cutting accident, or the drawing-down accident, etc.

Description

The piling quality automonitor

The utility model relates to a kind of instrument of cast-in-situ bored pile perfusion overall process being implemented automatic detection.

Cast-in-situ bored pile generally is used for the foundation of bridge and construction work, its construction technology is to hole on ground or riverbed with drilling machine, use the catheterized reperfusion underwater concrete behind the pore-forming: be about to conduit and insert in the interior mud of pore-forming extremely near the shaft bottom, by conduit concrete placing mix in pore-forming, treat that conduit imbeds mix certain depth (4-6 rice), promote conduit (1-2 rice), irritate mix again, repeat above process and make concrete mix fill wellhole, finish the stake process of irritating.This filling stake technology is careless slightly in work progress, will cause conduit to extract the underwater concrete mix, makes mud in the wellhole instead in conduit, occurs fracture accident once more when conduit is poured mix into; Perhaps carry morely on the conduit, make its buried depth more shallow (as less than 0.5 meter) occur irritate a stake undergauge accident.These accidents were difficult to find at that time, after the intensity that can only treat stake forms, with there not being damaged test or the method for core boring sampling is measured.The method of handling generally is respectively to add one (method of riding) in the both sides of former accident stake, or the heavy concrete placing in broken back is bored in former accident stake.Handle its construction costs and duration in any case and all will cause very big waste.

The purpose of this utility model is to provide a kind of piling quality automonitor, to prevent quality accidents such as broken pile or undergauge.

The purpose of this utility model realizes by following technical proposals:

The piling quality automonitor has single-chip microcomputer and peripheral circuit thereof, keyboard, display, printer, its technical scheme is that it also has two pressure transducers, the two-way low-pass amplifier, subtracter, warning circuit, calendar/clock circuit, be arranged in toward two pressure transducers of the conduit upper and lower of pore-forming concrete placing mix the pressure of mud or mix is converted to electric signal, its output terminal is connected with the input end of two-way low-pass amplifier respectively, the output terminal of two-way low-pass amplifier is connected with the input end of single-chip microcomputer respectively, above-said current signal send single-chip microcomputer to carry out data acquisition after the two-way low-pass amplifier amplifies like this, to obtain the absolute pressure of two pressure transducer positions, the output terminal of two-way low-pass amplifier also is connected with the input end of subtracter respectively simultaneously, the output terminal of subtracter is connected with the input end of single-chip microcomputer, utilize subtracter to take out the poor of two paths of signals, for single-chip microcomputer provides pressure difference data, the output terminal of single-chip microcomputer is connected with the input end of warning circuit, and the output terminal of calendar/clock circuit is connected with the input end of single-chip microcomputer.

The utility model is owing to have two pressure transducers, two-way low-pass amplifier, subtracter, warning circuit, calendar/clock circuit.Whether it can be in the bored concrete pile filling process like this, indicate conduit embedding position in mix safe and reliable at any time, when buried depth less than 4 meters or when extracting the concrete mixing charge level, provide audible alert and picture cues immediately, and print record.Like this, construction technical staff, management personnel are in the indoor situation that just can understand the working-yard timely and accurately, and guiding construction reduces accident rate greatly.Even broken pile or undergauge take place, before concrete initial set, also be easy to handle.The piling quality automonitor is installed in to have significantly on the existing bored concrete pile equipment and improves the quality, cost saving, is convenient to characteristics such as management, easy operation.

The utility model is described in further detail below in conjunction with embodiment:

Fig. 1 is the block scheme of the utility model piling quality automonitor.

Fig. 2 is single-chip microcomputer and peripheral circuit thereof, each interface circuit figure.

Fig. 3 is the circuit diagram of two pressure transducers, two-way low-pass amplifier, subtracter.

Fig. 4 is the electrical schematic diagram of warning circuit.

Fig. 5 is the electrical schematic diagram of calendar/clock circuit.

Fig. 6 is the electrical schematic diagram of single chip communication interface.

Synoptic diagram when Fig. 7 is the use of the utility model piling quality automonitor.

Fig. 8 is the pressure differential curve of two pressure transducers in the work progress.

As Fig. 1, Fig. 2, Fig. 3, Fig. 4, shown in Figure 5, the utlity model has single-chip microcomputer and peripheral circuit 6 thereof, keyboard 8, display 9, printer 10, two pressure transducers 1 and 2, two-way low- pass amplifier 3 and 4, subtracter 5, warning circuit 11, calendar/clock circuit 7.Be arranged in toward two pressure transducers 1 and 2 the pressure of the conduit upper and lower of pore-forming concrete placing mix and be converted to faint electric signal mud and mix, its output terminal is connected with 4 input end with two-way low-pass amplifier 3 respectively, two-way low-pass amplifier 3 is connected with the input end of single-chip microcomputer respectively with 4 output terminal, above-said current signal send single-chip microcomputer to carry out data acquisition after two-way low- pass amplifier 3 and 4 amplifies like this, to obtain the absolute pressure of 2 points (two pressure transducer positions), simultaneously two-way low-pass amplifier 3 also is connected with the input end of subtracter 5 respectively with 4 output terminal, the output terminal of subtracter 5 is connected with the input end of single-chip microcomputer, utilize subtracter 5 to take out the poor of two paths of signals, for single-chip microcomputer provides pressure difference data, the output terminal of single-chip microcomputer is connected with the input end of warning circuit 11, and the output terminal of calendar/clock circuit 7 is connected with the single-chip microcomputer input end.Single-chip microcomputer adopts high performance 80C196, and itself has more import, and has multi-channel a/d converter, can make this monitor have higher integrated level and reliability.Its peripheral circuit comprises address decoder U2, U3, memory under program U4 and data memory U5.Resistance R 1, button REST and capacitor C 2 constitute its reset circuit; C3, C4, OSC1 are its clock generation circuits.The manual control of this monitor adopts keyboard 8 to carry out, and comprises that transducer sensitivity is set, pound sign is imported, prints control and date modification etc.Keyboard comprises 16 keys, is respectively 0-9 10 numeric keys, decimal key, print control key, function selecting key, acknowledgement key, cancel key and reset key.Adopt the matrix type keyboard, need 4 tunnel output and 4 road input signals altogether, adopt the output of HSO do, ACH0-ACH3 to make input signal.R2 is input end pull-up resistor row.LCD (LCD) 9 adopts MGLS graphical dots formation, can be directly and the bus of 80C196 link, therefore, its data line data bus (D0-D7) direct and 80C196 links, data/commands (D/I), read/write (R/W), two chip selection signals (CSA and CAB) link with 80C196 address bus (A0-A3), and Enable Pin (E) is produced by coding chip U3 decoding; LCD needs negative supply (V0), and in order to regulate the briliancy of display, this monitor adopts transistor BG1, resistance R 3, R4 and potentiometer W5 to control its V0.Printer 10 adopts TP series mini printer, its print data is by the P1 mouth output of 80C196, in order to save the hardware system resource, its gating signal is produced by the high-speed output end HSO0 of 80C196, and print status signal is detected by two P2 pins and the two-way high speed input pin HSI of 80C196.Two pressure transducers 1 and 2 type can be selected, and carry out corresponding setting by keyboard, more behind the emat sensor as long as again system configuration is provided with.Two-way low- pass amplifier 3 and 4 is made of U10, U11, U9C, U9D and corresponding peripheral cell respectively.Wherein, U10, U11 are instrument amplifier AD620 chip, and its voltage amplification factor can be regulated between 1-1000, and be had very high degree of stability by W1 and W3 control, and W2 and W4 are used for adjusting the zero point of pair amplifier.U9C, R9, R10, C9, C10, and U9D, R11, R12, C11, C12 constitute the low-pass filter of second order respectively, with the filtering high-frequency interferencing signal, further improves the degree of stability of detected signal.D2-D5 constitutes amplitude limiter circuit, in case stop signal surpasses the 0-5V scope, damages single-chip microcomputer 80C196.U9B, R6-R8 constitute the circuit of subtracter 5, calculate two pressure transducer pressure differentials, for single-chip microcomputer provides necessary basis for estimation.Adopt the HSO1 of 80C196 to make alarm control signal (ALARM), corresponding warning circuit 11 as shown in Figure 4, the conducting of the HSO1 control triode BG2 by 80C196, and then the control hummer BZ warning of sounding.Calendar/clock circuit 7 can provide the real time, in order to filing, adopts PCF8583 clock chip U6, as shown in Figure 5.Its count signal is produced and can be finely tuned by C13 by crystal OSC2.When clock is walked continuously,, and can be its charging by R5 and D1 for clock circuit is provided with the backup battery of 3.6V; Simultaneously, because PCF8583 also possesses the memory of 256 bytes, its some basic configuration also exist in this chip, as type of sensor and sensitivity etc.As shown in Figure 6, for ease of carrying out data communication, reserved computer interface 12 with computing machine.Except that 1 RS232 mouth, also be provided with 1 RS422 interface, transmit with the long distance that makes things convenient for data.The RS232 mouth adopts MAX232 chip U7, and C5-C8 is the necessary peripheral cell of this chip, with produce the RS232 standard required ± 12V voltage; The RS422 interface adopts MAX483 chip U8, because this chip can only work in half-duplex mode, its transmission and reception are by the SCTL signal controlling of 80C196 output.IN1-IN3 is the simulating signal of amplifying and subtracting each other from sensor, process, introduces 80C196 by ACH4-ACH6 and carries out data acquisition.SCL, SDA and CLOCK are the output signals of calendar/clock circuit; TXD, RXD and SCTL are the Computer Communications Interface control signals.

As shown in Figure 7, by designing requirement boring, insert conduit 15 in the mud 16 in pore-forming 14, two pressure transducers 1 and 2 are installed on conduit simultaneously, draw lead 19 and be connected on the monitor other parts 20 near shaft bottom 18 with drilling machine.Mix 17 is poured material filling bucket 13 backs into and is flushed to the pore-forming shaft bottom along conduit 15, impact the mud in shaft bottom, mud is pushed into the well head direction by the shaft bottom, increase with concrete mix, mix replaces mud gradually, (generally requiring conduit buried depth 4-6 rice in mix), pipe laying depth can be to upper lifting pipes during greater than 4 meters.Two pressure transducers 1 and 2 respectively the bottom of conduit and apart from the conduit bottom 4 meters upwards, be located on the outer wall of conduit.As shown in Figure 8, when the buried depth of conduit during greater than 4 meters, construction can guarantee not undergauge of broken pile, and the pressure differential of two pressure transducers is a bigger weighing apparatus value (Δ P ≈ 4 * 2.4t/m up and down ²), show on display screen and the printer paper, illustrate working properlyly, again from material filling mouth batch turning some, mud is discharged outside the well by well head, feel that the conduit blanking has resistance slightly, pipe laying depth by 4 meters to more than 6 meters the time, carry on the conduit, the pressure on upper and lower two pressure transducers all reduces, and decrease equates that the pressure differential on the two sensors is still weighing apparatus value (segment of curve 3 ').After upper sensor exceeds mud and mix interphase, because mud unit weight (1.3t/m ³) be significantly less than mix unit weight (2.4t/m ³), when carrying in the continuation, the pressure variety of upper sensor obviously slows down, and the pressure reduction between two pressure transducers also begins to diminish simultaneously, and the display screen pressure curve reduces, and conduit can not be upwards carried in the prompting of sounding simultaneously again, and needs perfusion mix (segment of curve 4 ').Repeating above process fills wellhole up to mix, one does not have the stake of broken pile and undergauge quality problems just to finish, if field personnel, under the situation of auditory tone cues and pressure curve indication, can't stop upwards to carry conduit, just for saving trouble, it is too much once to promote conduit, makes near the lower sensor of conduit mouth near mud and mix interface, and pressure differential is reduced near certain specific value delta P ≈ 4 * 1.3t/m between two pressure transducers up and down ², instrument will serve sound a grave warning, simultaneously ill effect be shown that on the pressure curve of display screen, at this moment broken pile or undergauge have just taken place, and handle (segment of curve 5 ') immediately.No matter whether the workmen handles, and instrument will write down this work progress and print with pressure curve faithfully, fully show the advantage of piling quality monitor.Pressure differential curve before segment of curve 1 among Fig. 8 ' expression perfusion mix, the segment of curve 2 ' pressure differential curve of perfusion mix process when expression two pressure transducers all exceed mix.

Claims (1)

1, a kind of piling quality automonitor, have single-chip microcomputer and peripheral circuit thereof, keyboard, display, printer, it is characterized in that it also has two pressure transducers (1) and (2), two-way low-pass amplifier (3) and (4), subtracter (5), warning circuit (11), calendar/clock circuit (7), be arranged in toward two pressure transducers (1) of the conduit upper and lower of pore-forming concrete placing mix and (2) pressure of mud and mix is converted to electric signal, its output terminal is connected with the input end of two-way low-pass amplifier (3) and (4) respectively, the output terminal of two-way low-pass amplifier (3) and (4) is connected with the input end of single-chip microcomputer respectively, above-said current signal send single-chip microcomputer to carry out data acquisition after two-way low-pass amplifier (3) and (4) amplification like this, to obtain the absolute pressure of two pressure transducer positions, the output terminal of two-way low-pass amplifier (3) and (4) also is connected with the input end of subtracter (5) respectively simultaneously, the output terminal of subtracter (5) is connected with the input end of single-chip microcomputer, utilize subtracter (5) to take out the poor of two paths of signals, for single-chip microcomputer provides pressure difference data, the output terminal of single-chip microcomputer is connected with the input end of warning circuit (11), and the output terminal of calendar/clock circuit (7) is connected with the input end of single-chip microcomputer.

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