CN101135734A - Foundation ground water parameter measurement method and system based on pressure tracing - Google Patents

Abstract

The method comprises: using the feature of the pressure, that is the pressure can be fast transferred in underground water continuous medium, and be rapidly sensed, and be easy to be measured, to form a seepage pressure field; wherein, the pressure is used as a tracer; a pressure sensor is used to sense the correlated relation between the increased/decreased amounts of the tracer and the stratum medium; making GRS positioning, wireless data transmission; automatically generating and controlling pressure source; seepage database integration; computer analysis, calculation and recognition in order to display the hydrogeology engineering construction element under different boundary condition.

Description

Foundation ground water parameter measurement method and system based on pressure tracing

Technical field

The present invention relates to a kind of method and system of foundation works measuring technique, especially ground water parameter measurement, specifically a kind of foundation ground water parameter measurement method and system based on pressure tracing.

Background technology

As everyone knows, the hydrogeological parameter measurement relates to the every aspect of underground engineering construction.As long as there is seepage action of ground water will have influence on the stable of foundation works and build.How to guarantee the foundation works design and construction, current way is that indoor sampling and field condition are measured two kinds of methods, obtains the permeability parameters on different structure stratum.The method of present on-the-spot foundation ground water parameter measurement and use mainly contains three classes: the one, and the bailing test method, it is at heavy caliber of underground drilling, bore several small-bore water level observation wells all around, submersible pump is put into the underground water yield of extraction in the well and the corresponding relation of groundwater table decreasing, utilizes and attack Bouyei's bailing test formula and calculate phreatic parameter; The advantage of this method is traditional, long and simple; Shortcoming is that many, time parameter long, that obtain of spending is few.The 2nd, the isotope tracer measurement method, it is to calculate hydrogeological parameter by measuring natural and distribution artificial ground water's seepage field; As Chinese patent 98111509.8,98227872.1; United States Patent (USP) 6445187,4051368; BrP 2009921, their advantage are that measuring equipment is light, measuring point is many, and measuring accuracy is higher; Shortcoming is that isotope tracer measurement has certain influence to the environment and the mankind.The 3rd, the dam bore grouting that engineering circle generally adopts promptly gathers three rows or more row's degree of depth to the boring of the dam foundation, then along dam crest, pursue the hole, carry out pressure grouting piecemeal, filling up has the hole part in the dam body, to strengthen the global density of dam, reduce its perviousness, stop dam to continue seepage.Advantage is that construction technology is simple, and technical requirement is not high, and general construction brigade can both construct, and the homogenieity earth dam little to leakage can be obtained certain grouting effect; Shortcoming is too expensive, and the disposable grouting expense of dam does not wait to tens million of units ten million, and holes numerous and apply bigger pressure grouting, and dam body is had certain damage.The hydrogeology prospecting is the observation of point and the science of test, and site density is big more, and measuring accuracy is high more.Tradition bailing test method is difficult to improve the density of point, and obtained parameter does not quantitatively satisfy the needs of present hydrogeologic evaluation and computing method especially in quality.Along with the high speed development of the development of the national economy, more and more Duo engineering construction has proposed the technical barrier that a series of engineering seepage flow need solve to the potential accident potential that seepage action of ground water causes.As the piping and seepage of river dyke, the rational exploitation of water head site, the water burst control in mine, the seepage action of ground water of highway bridge and culvert, the hydrogeological survey of sub., the measurement means such as draining of skyscraper foundation ditch the more requirement of Gao Gengxin has been proposed.

Only the leak detection of reservoir and river dyke just forms a technical industry.The country that present world reservoir quantity comes TOP V is China, the U.S., India, Spain and Japan, accounts for 80% of global reservoir total amount.Because the special role of reservoir when bringing huge interests to people, also can cause catastrophic effect to the mankind.Kilometer surplus the seat surplus the existing reservoir 8.6 ten thousand of China, river dyke 270,000 is the first in the world.From the Republic of China 2976 reservoir dam breaks are arranged by 1980 just; Just there are 500 big dam failures in Switzerland in the past 175 years.Therefore, detect leakage cause effectively and eliminate its hidden leakage defect, become global problem.The whole world has 40% reservoir dam to exist hidden leakage defect approximately, as Long Yangxia, the Xinanjiang River, Liujia Gorge, Ba Panxia, Mei Shan, discipline village, Bi Kou, overline bridge, two beaches, the Xiao Langdi of China; The Malpasset arch dam of France, gondola Vajont reservoir, engineerings such as the Zeuzier arch dam of Switzerland and the high arch dam of Austrian Koelnbrein.For this reason, national governments expend huge fund every year and carry out the reparation of seepage reservoir and the research of new detection method.The Huang Bi village reservoir 2002 of China because of the expense of leakage problems maintenance up to 700,000,000 yuans; It is reported that the existing dangerously weak reseroirs of U.S.'s reparation need spend 30,000,000,000 dollars; Approximately expensive 3,000 hundred million dollars of existing dam hidden danger are eliminated in the whole world.

Summary of the invention

One of the objective of the invention is that the investment that exists at existing ground water parameter measurement method is big, the cycle long or to environment to pollution problems is arranged, invent a kind of small investment, free of contamination measuring method.

Two of purpose of the present invention is that a kind of measuring system of invention is used to realize the low-cost of groundwater parameter measured fast.

One of technical scheme of the present invention is:

A kind of foundation ground water parameter measurement method based on pressure tracing, it is characterized in that on measured target, requiring to get out a pressurization hole and more than one spike measured hole according to measurement index, and the degree of depth that makes the pressurization hole of being bored and spike measured hole meets or exceeds the base plate in water-bearing zone, utilize water injection pipe to the pressurization water of exerting pressure in the hole then, the measuring tube that has pressure transducer is installed in the spike metering-orifice, at last according to the requirement of measurement project and the measuring accuracy press water of in the pressurization hole, annotating repeatedly, record in the measuring tube force value and time parameter thereof and send into and handle the groundwater parameter value that can obtain measured target in the computing machine corresponding calculated module.

Two of technical scheme of the present invention is:

A kind of foundation ground water parameter measurement system based on pressure tracing, comprise water pump 1, water injection pipe 13, measuring tube 14, pressure transducer 19, information Control terminal 17 and computing machine 18, the water inlet that it is characterized in that water pump 1 links to each other with cistern 0, its outlet links to each other with water injection pipe 13 by water pipe 6, the lower end of water injection pipe 13 is arranged in the water-bearing zone 15 on measured basis or passes water-bearing zone base plate 16, when water injection pipe 13 is arranged in water-bearing zone 15, at itself and 15 top board relative position places, water-bearing zone main sealing embolism 7 is installed, when it passes water-bearing zone base plate 16, at itself and water-bearing zone base plate 16 relative position places secondary sealing embolism 6 is installed, measuring tube 14 is installed on the measured basis with the degree of depth with water injection pipe 13, pressure transducer 19 is installed in this measuring tube 14, it links to each other with information Control terminal 17 by wired or wireless, information Control terminal 17 links to each other with computing machine 18, and the part perisporium that water injection pipe 13 and measuring tube 14 are arranged in water-bearing zone 15 is provided with permeable hole.

Water pump 1 links to each other with driving machine 2, driving machine 2 is connected with supercharge pump 3 simultaneously, the import of supercharge pump 3 links to each other with the inlet of water pipe 6 with the outlet of water pump 1, and flowmeter 4 and tensimeter 5 are installed on water pipe 6, and they are all sent in the computing machine 18 by wired or wireless flow value and force value with water pipe 6.

Described pressure transducer 19 also is connected with GPS, and they are by 12 wireless the linking to each other of wireless module in wireless telemetering 11 and the information Control terminal 17, information Control terminal 17 and 18 wired linking to each other of computing machine.

Beneficial effect of the present invention:

The existing logging technology of method of the present invention is compared, and has both overcome traditional bailing test shortcoming many, that efficient is low, parameter is few of spending, and has eliminated the harm of isotope tracer logging to human body and environment again.Have that Measuring Time is short, speed is fast, scope is wide, precision is high, density is big, can satisfy the characteristics that Geotechnical Engineering is built needs.It is simple to have system simultaneously, the advantage that is easy to realize.

Description of drawings

Fig. 1 is a system architecture synoptic diagram of the present invention.

Fig. 2 is a process flow diagram of the present invention.

Embodiment

The present invention is further illustrated below in conjunction with drawings and Examples.

A kind of foundation ground water parameter measurement method based on pressure tracing, on measured target, require to get out a pressurization hole and more than one spike measured hole according to measurement index, and the degree of depth that makes the pressurization hole of being bored and spike measured hole meets or exceeds the base plate in water-bearing zone, utilize water injection pipe to the pressurization water of exerting pressure in the hole then, the measuring tube that has pressure transducer is installed in the spike metering-orifice, at last according to the requirement of measurement project and the measuring accuracy press water of in the pressurization hole, annotating repeatedly, record in the measuring tube force value and time parameter thereof and send into and handle the groundwater parameter value that can obtain measured target in the computing machine corresponding calculated module.

Why underground water can move, based on two fundamental prerequisites, one of be energy (head difference) effect that will have initiatively, the two passive media that block water certain hole will be arranged.They are a pair of technology carrier of the unity of opposites.Principle of work of the present invention is energy by this to technology carrier just and the unity of opposites of the medium that blocks water concern that working pressure makes tracer agent, follows the tracks of the space motion path of pressure tracing agent, is familiar with the characteristics of motion of seepage action of ground water.Utilize pressure in the underground water continuous medium, to transmit soon, be quick on the draw, the measurement of characteristics implement to finish a whole set of hydrogeological engineering seepage parameters such as synchronism is good, be easy to measure.

For this reason, at first should in computing machine, develop hydrogeological parameter software for calculation bags such as reservoir dam seepage calculation, skyscraper drainage of foundation pit, the calculating of sub. hydrogeological parameter, highway bridge and culvert seepage action of ground water, colliery layering subsurface water measurement, underground water rational exploitation, rock mass seepage action of ground water.Be equipped with corresponding measurement technology and logging method according to measured object, and send it to control and measurement mechanism.Second will design a kind of cover control and measurement mechanism (see for details hereinafter and set forth): this device is made up of tensimeter, flowmeter, GPS location, wireless telecommunications, pressure transducer and information Control terminal; The information Control terminal is accepted the instruction from computing machine, and with its measurement data that collects and computing machine communication.The reading of underground each spatial point upward pressure sensor always occurs with respect to the numerical value on tensimeter and the flowmeter, and their size is the Penetration Signature in reflection water-bearing zone directly.Pressure transducer is the measurement group with the single hole, 1-5 is installed only for every group, carries out 100 holes at most, and 500 pressure transducers are measured simultaneously.GPS location and wireless telecommunications are limited on the more large-scale underground works of reservoir dam and gaging hole to be used; Then adopt wire communication and artificial yardstick to measure to the few less engineering of gaging hole.The pressure tracing device is made up of motor, water pump, supercharge pump, tensimeter, flowmeter, pipeline and main sealing embolism and secondary sealing embolism; They are under the domination of control and measurement mechanism, technology according to appointment supplies water to the stratum, and in the water-bearing zone of appointment, generate pressure source, the size of pressure of supply water and flow, directly reflect by tensimeter and flowmeter, supercharge pump is the utility appliance of water pump, when pressure does not reach the effect of measurement, promptly uses the supercharge pump pressurization.Change less than the pressure tracing agent if be installed in the pressure transducer induction of each gaging hole, promptly start supercharge pump pressure source is pressurizeed.Secondary sealing embolism is a utility appliance, when boring is disclosed when be complete water-bearing zone, just at the top board in water-bearing zone main sealing embolism is installed, the secondary sealing embolism of installation on the base plate in water-bearing zone.If disclosed when being non-complete water-bearing zone, main sealing embolism then only is installed on the top board in water-bearing zone, secondary sealing embolism does not need to install.

Last again by computing machine to the measurement data that collects by control and measurement mechanism analyze, debugging and percolation model calculate, the output result of calculation that both pictures and texts are excellent: hydrogeological disaster evaluation, highway bridge and culvert seepage action of ground water parameter, each layering underground water of colliery of comprising dam infiltration network chart, Different Strata drainage of foundation pit amount, sub. contain reserves, phreatic rational exploitation amount, rock mass seepage action of ground water parameter, dam leakage passage leak stopping etc., as shown in Figure 2.

Measuring system of the present invention as shown in Figure 1.

A kind of foundation ground water parameter measurement system based on pressure tracing, comprise water pump 1, water injection pipe 13 (being the pressure tracing hole), measuring tube 14 (being the pressure observation hole), pressure transducer 19, information Control terminal 17 and computing machine 18, the water inlet of water pump 1 links to each other with cistern 0, its outlet links to each other with water injection pipe 13 by water pipe 6, the lower end of water injection pipe 13 is arranged in the water-bearing zone 15 on measured basis or passes water-bearing zone base plate 16, when water injection pipe 13 is arranged in water-bearing zone 15, at itself and 15 top board relative position places, water-bearing zone main sealing embolism 7 is installed, when it passes water-bearing zone base plate 16, at itself and water-bearing zone base plate 16 relative position places secondary sealing embolism 6 is installed, measuring tube 14 is installed on the measured basis with the degree of depth with water injection pipe 13, pressure transducer 19 is installed in this measuring tube 14, it links to each other with information Control terminal 17 by wired or wireless, information Control terminal 17 links to each other with computing machine 18, and the part perisporium that water injection pipe 13 and measuring tube 14 are arranged in water-bearing zone 15 is provided with permeable hole.Water pump 1 links to each other with driving machine 2, driving machine 2 is connected with supercharge pump 3 simultaneously, the import of supercharge pump 3 links to each other with the inlet of water pipe 6 with the outlet of water pump 1, and flowmeter 4 and tensimeter 5 are installed on water pipe 6, and they are all sent in the computing machine 18 by wired or wireless flow value and force value with water pipe 6.Described pressure transducer 19 also is connected with GPS, and they are by 12 wireless the linking to each other of wireless module in wireless telemetering 11 and the information Control terminal 17, information Control terminal 17 and 18 wired linking to each other of computing machine.

When working, the present invention at first connects water pump 1 and supercharge pump 3 by driving machine 2, the water inlet of water pump 1 stretches into cistern 0, water delivering orifice connects water-supply-pipe 6 and enters in the water injection pipe 13, main sealing embolism 7 and secondary sealing embolism 8 are installed in the water injection pipe 13, main sealing embolism 7 is placed in the top board in water-bearing zone 15, secondary sealing embolism is placed in the base plate 16 in water-bearing zone 15, under the shutoff of two sealing embolisms, forms pressure chamber 10 therebetween; After driving machine 2 starts, water pump 1 and supercharge pump 3 enter pressure flow main sealing embolism 7 and secondary sealing embolism 8 and it are filled big sealing along aqueduct 6 and water injection pipe 13, under the shutoff of two sealing embolisms, pressure flow begins to supply water and formation pressure source 9 to pressure chamber 10, to water-bearing zone 15 pressurized water supplies.Along with the increasing of pressure source 9, pressure flow is delivered in the farther measuring tube 14 by the water-bearing zone.The flow of the pressure chamber 10 in the water injection pipe 13 and the size of pressure show and send to information Control terminal 17 by flowmeter 4 and tensimeter 5; Be arranged in pressure transducer 19 in the measuring tube 14 under the effect of pressure source 9, demonstrate the growth and decline amount of pressure transducer 19 and the corresponding relation of the numerical value of pressure chamber 10 on tensimeter 5, send to information Control terminal 17, information transmission between them both can constitute wireless system for transmitting data by the wireless telemetering on the information Control terminal 17 11 and the GPS steady arm and the wireless communication apparatus 12 that are installed on each aperture, pressure observation hole, also can connect, carry out wire transmission by electric wire.The former is mainly used in the observation to reservoir dam seepage flow; The latter then is used in the measurement of the few hydrogeological parameter of gaging hole quantity.The data of all information Control terminals 17 and computing machine 18 communications, store the mathematics computing models such as draining of foundation ditch of hydrogeological survey, the skyscraper of seepage action of ground water, the sub. of water burst control, the highway bridge and culvert in rational exploitation, the mine of piping and seepage, the water head site of river dyke in the computing machine 18, at the needs of different engineering hydrogeological parameters, computing machine 18 tutorial message control terminals 17 will need carry out next step operation by the precision of corresponding techniques technology and parameter.

Computing machine 18 stores all kinds of engineering hydrogeology seepage flow analysis software package as command centre, and at the demand computing machine and the information Control terminal called of different engineering parameters, the guiding pressure tracking device is carried out control corresponding technology; Information Control terminal and flowmeter, tensimeter, pressure transducer carry out information transmission, and control the size of its flow and pressure and the time of opening; Driving machine drives water pump and supercharge pump supplies water to underground reservoir by pipeline, and pipeline is put into drilling well, and on the top of pipeline the sealing embolism is installed, and supplying water is subjected to the shutoff of sealing embolism, forms the pressure tracing source in the water-bearing zone.Computing machine is implemented corresponding technology and the calculation procedure measured according to engineering construction character commander information Control terminal; Carry out analysis, calculating, the debugging of percolation model according to the data acquisition data, feedback theory calculates the match with the numerical measuring result.The information Control terminal is accepted the instruction that computing machine sends, the communication of controlled pressure sensor data acquisition and the duplicate measurements of information feedback.The pressure transducer group is that group is arranged 1～5 pressure transducer by stratal configuration with the individual well, can carry out 100 mouthfuls of wells, the synchro measure of 500 pressure transducers at most; At each well head set-up GPS location and wireless telecommunication system; Pressure sensing is with wired and wireless dual mode and information Control terminal called.Supercharge pump is the utility appliance of water pump, when water pump institute applied pressure does not reach the pressure tracing effect, just uses the supercharge pump pressurization.Flowmeter and tensimeter are subjected to the control of information control terminal, and the coordination pressure sensor receives the power of information, instruct driving machine, water pump, supercharge pump to work under pressure of stipulating and flow; And carry out wired and wireless dual mode communication with the information Control terminal.Major-minor sealing embolism is installed in the water injection pipe, and the distance that its sealing embolism is installed is according to the profile adjustment in water-bearing zone; After the starting mode of pump pressurization, the sealing embolism fills under the effect of pressure greatly, and flow that is applied and pressure can only promptly enter the stratum between two embolisms at the roof and floor in water-bearing zone; Thicker as the water-bearing zone, boring does not reach the base plate in water-bearing zone, then only at the top board in water-bearing zone a main sealing embolism is installed and is got final product.

Hydrogeological parameter related to the present invention is calculated as follows:

When pressure tracing device startup water supply reaches a stable flow rate and pressure definite value, the water-yielding stratum forms metastable artificial seepage field, water supply flow Q in the pressure chamber 10 is presented on the flowmeter 4, and this output Q is divided by right cylinder sectional area (the A=2 π rm of pressure chamber 10; R is the well radius; M is the thickness in water-bearing zone), calculate the seepage velocity (U) of the layer that supplies water by " Darcy's law " formula:

$U=\frac{Q}{2\mathrm{r\πm}}......\left(1\right)$

Under artificial influence on flow field, seepage action of ground water gradient originally changes, and new hydraulic gradient is calculated the pressure (h that measures according to pressure transducer 19 in each well logging on every side ₁, h ₂, h ₃... .) the H value is poor on the tensimeter 5 of head and pressure chamber 10, and the horizontal range L between them, can calculate the hydraulic gradient J between the pressure transducer 19 and water injection pipe 13 in each measuring tube 14, the perhaps volume coordinate of the pressure transducer by the GPS location and tensimeter and each pressure transducer difference calculating of measuring:

$J=\frac{H-h}{L}......\left(2\right)$

Pressure transducer is distributed in the different spatial of artificial seepage field, along with the difference of stratal configuration, the announcement of its hydraulic gradient and infiltration coefficient has nothing in common with each other, therefore, distribute according to different hydraulic gradients, calculate the coefficient of permeability K of each measuring point with " Darcy's law ":

$K=U\frac{H-h}{L}=\mathrm{UJ}......\left(3\right)$

Different pressure head (the h that measures according to each spatial point upward pressure sensor 19 ₁, h ₂, h ₃... .), be finally inversed by the seepage velocity U of each measuring point:

$U=\frac{K}{J}......\left(4\right)$

The specific yield of table water aquifer changes water filling in the well of water pump into suction, when the flow Q that draws water reaches the drop-out value h of a stability number divided by the table water aquifer water level, obtains the specific yield μ of table water aquifer:

$\mathrm{\μ}=\frac{Q}{h}......\left(5\right)$

The storativity of confined aquifer is used poor (H-h) of the difference (Q-q) of the different water delivery flows of secondary divided by the different pressures under the flow correspondence, obtains the storativity μ of this confined aquifer _e:

${\mathrm{\μ}}_e=\frac{Q-q}{H-h}......\left(6\right)$

The three dimensions unsteady state flow through porous medium differential equation:

$\frac{\mathrm{\δ}}{\mathrm{\δx}}\left(k_x\frac{\mathrm{\δh}}{\mathrm{\δx}}\right)+\frac{\mathrm{\δ}}{\mathrm{\δy}}\left(k_y\right)+\frac{\mathrm{\δ}}{\mathrm{\δz}}\left(k_z\frac{\mathrm{\δ}}{\mathrm{\δz}}\right)=s_s\frac{\mathrm{\δh}}{\mathrm{\δt}}.......\left(7\right)$

H is a head in the formula; k _x, k _y, k _zFor being respectively the infiltration coefficient of xyz aspect; S _sBe the unit pondage; T is the time.It is applicable to pressure-bearing and unconfined aquifer, only needs just can carry out the calculating of three dimensions unsteady state flow through porous medium in conjunction with specific initial and boundary condition separately.

The three dimensions steady seepage differential equation:

$\frac{{\mathrm{\δ}}^{2}h}{\mathrm{\δ}{x}^2}+\frac{{\mathrm{\δ}}^{2}h}{\mathrm{\δ}{y}^2}+\frac{{\mathrm{\δ}}^{2}h}{\mathrm{\δ}{z}^2}=\frac{s_s}{k}\frac{\mathrm{\δh}}{\mathrm{\δt}}......\left(8\right)$

When the homogeneous isotropy, the three dimensions unsteady state flow through porous medium differential equation of (7) formula promptly becomes the steady seepage differential equation, and it is the special case of the three dimensions unsteady state flow through porous medium differential equation.

Head boundary

$h{|}_{{\mathrm{\Γ}}_1}=h(x,y,z,t)......\left(9\right)$

The flow border

$k_n\frac{\mathrm{\δh}}{\mathrm{\δn}}{|}_{{\mathrm{\Γ}}_2}=-q(x,y,z,t)......\left(10\right)$

Free boundary condition

$\left\{\begin{array}{c}h=z......\left(11\right)\\ q=\mathrm{\μ}\frac{\mathrm{\δh}}{\mathrm{\δt}}\cos \mathrm{\θ}......\left(12\right)\end{array}\right.$

Starting condition

| _t＝0＝h(x，y，z，0)......(13)

The surface level two dimensional fluid flow equation that flows supply is more arranged

$\frac{\mathrm{\δ}}{\mathrm{\δx}}\left(\mathrm{kT}\frac{\mathrm{\δh}}{\mathrm{\δx}}\right)+\frac{\mathrm{\δ}}{\mathrm{\δy}}\left(\mathrm{kT}\frac{\mathrm{\δh}}{\mathrm{\δy}}\right)+\frac{k^{`}}{T^{``}}(H-h)+\stackrel{\‾}{\mathrm{\ω}}=s\frac{\mathrm{\δh}}{\mathrm{\δt}}......\left(14\right)$

Definite condition is:

h| _t＝0＝h(x，y)......(15)

$h{|}_{{\mathrm{\Γ}}_1}=h(x,y,t)......\left(16\right)$

$\mathrm{kT}\frac{\mathrm{\δ}}{\mathrm{\δn}}{|}_{{\mathrm{\Γ}}_2}=-q(x,y,t)......\left(17\right)$

In the formula: kT is a coefficient of transmissibility, and confined aquifer is kT, and unconfined aquifer then is H (when getting the water proof base plate as reference field, H is a phreatic table); K ˋ, T ˋ are the infiltration coefficient and the thickness of aquitard; T is a confined aquifer thickness; H is the head on the weak permeable interlayer; S is the water storage coefficient; W is (evaporation) amount of infiltrating of unit area.Γ ₁Be head boundary; Γ ₂Be the flow border; H is a head; Q is a seepage flow; T is the time; N is a porosity.

In fact, the seepage theory of seepage action of ground water and engineering seepage flow communicates, and just according to the definite condition of different engineerings, draws the hydrogeological parameter of corresponding engineering.Utilize the pressure tracing device to generate artificial seepage field in engineering foundation, by the data that control and measurement mechanism are followed the tracks of the spatial variability of pressure tracing agent, substitution (1)～(6) formula can obtain percolation flow velocity (U); Hydraulic gradient (J); Infiltration coefficient (K); Specific yield μ and storativity μ _e, and starting condition and boundary condition substitution (7)～(17) under these underlying parameters and each engineering correspondence are various, send into the various hydrogeological parameters that final requirement of engineering was simulated, analyzes, debugs and calculated to computing machine.

The technical characterictic of measuring as seepage of dam is: dam is under the effect of high water head potential energy, and the dam body basis forms very strong seepage field.If dam has seepage, direct hydrological observation wells by arranging on the dam, disturbing under (pressure tracing) and non-interference (under the specific head of reservoir) the seepage field state, under a class Γ 1 head boundary condition, pressure transducer is put into the space hydraulic Head Distribution value that observation port is measured dam seepage flow field; Under two class Γ, 2 flow boundary conditions, Measurement of Dam leakage at this moment; The analysis of process computing machine and seepage calculation just can be known dam body seepage flow network spread and show the locus of leakage anomaly point, carry out connection test by the pressure tracing device to unusual hole is arranged again, and the passage that finds reservoir to leak is implemented grouting leak-stopping and got final product.

Part that the present invention does not relate to such as computing machine 17, information Control terminal 17, wireless telemetering 11 and wireless module 12, GPS etc. all can adopt prior art to be realized.

Claims (4)

1. foundation ground water parameter measurement method based on pressure tracing, it is characterized in that on measured target, requiring to get out a pressurization hole and more than one spike measured hole according to measurement index, and the degree of depth that makes the pressurization hole of being bored and spike measured hole meets or exceeds the base plate in water-bearing zone, utilize water injection pipe to the pressurization water of exerting pressure in the hole then, the measuring tube that has pressure transducer is installed in the spike metering-orifice, at last according to the requirement of measurement project and the measuring accuracy press water of in the pressurization hole, annotating repeatedly, record in the measuring tube force value and time parameter thereof and send into and handle the groundwater parameter value that can obtain measured target in the computing machine corresponding calculated module.

2. the measuring system of the described method of claim 1, comprise water pump (1), water injection pipe (13), measuring tube (14), pressure transducer (19), information Control terminal (17) and computing machine (18), the water inlet that it is characterized in that water pump (1) links to each other with cistern (0), its outlet links to each other with water injection pipe (13) by water pipe (6), the lower end of water injection pipe (13) is arranged in the water-bearing zone (15) on measured basis or passes water-bearing zone base plate (16), when water injection pipe (13) is arranged in water-bearing zone (15), at itself and top board relative position place, water-bearing zone (15) main sealing embolism (7) is installed, when it passes water-bearing zone base plate (16), at itself and water-bearing zone base plate (16) relative position place secondary sealing embolism (6) is installed, measuring tube (14) is installed on the measured basis with the degree of depth with water injection pipe (13), pressure transducer (19) is installed in this measuring tube (14), it links to each other with information Control terminal (17) by wired or wireless, information Control terminal (17) links to each other with computing machine (18), and the part perisporium that water injection pipe (13) and measuring tube (14) are arranged in water-bearing zone (15) is provided with permeable hole.

3. measuring system according to claim 2, it is characterized in that water pump (1) links to each other with driving machine (2), driving machine (2) is connected with supercharge pump (3) simultaneously, the import of supercharge pump (3) links to each other with the inlet of water pipe (6) with the outlet of water pump (1), flowmeter (4) and tensimeter (5) are installed on water pipe (6), and they are all sent in the computing machine (18) by wired or wireless flow value and force value with water pipe (6).

4. measuring system according to claim 2, it is characterized in that described pressure transducer (19) also is connected with GPS, they are by wireless the linking to each other of wireless module (12) in wireless telemetering (11) and the information Control terminal (17), information Control terminal (17) and wired linking to each other of computing machine (18).

Images