JP2010209582A - Slime property control method and automatic slime processing device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a slime property control method capable of improving the efficiency and accuracy of a replacement operation by observing, in real time, the properties of a stable liquid in which drilling chips are mixed and which contains slime which floats or sunk in the stable liquid and is in a two solid-liquid phase state to observe the mud lifting state while acquiring the state of slime distribution in a drilling hole and controlling a mud lifting means based on the information in a slime processing for lifting the stable liquid containing slime as drilling chips from the drilling hole. <P>SOLUTION: The stable liquid containing the slime sucked from the inside of a drilling hole 1 by a mud lifting means 9 is conveyed through a mud lifting path 4. At least the density among the density, mass flow, and volumetric flow of the stable liquid containing the slime during the conveyance is measured by a property measuring means 3. The property measurement information is controlled and recorded in time-series by a slime property control means 7. The controlled and recorded property information is displayed and output by a control information output means 8. By determining the state of slime processing, the mud lifting position of the mud lifting means 9 is controlled. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  In the construction of cast-in-place concrete piles or continuous underground walls, the present invention grasps the amount of slime in the borehole drilled in the ground, and efficiently removes the slime in this borehole and replaces it with a stable liquid. Thus, the present invention relates to a slime property management method and an automatic slime processing apparatus that enable a cast-in-place pile having excellent bearing power to be constructed.

  Cast-in-place piles constructed as foundation piles for large structures are excavated in the ground with a predetermined diameter and a depth that reaches the support ground while injecting a stabilizing liquid into the borehole, and after excavation, this drilled pile is excavated. It is constructed by removing the stabilizing liquid containing slime in the hole and replacing the slime with normal stabilizing liquid, and then placing concrete in the hole.

  Here, the normal stabilizing liquid is a combination of bentonite, CMC, and water, and the stabilizing liquid containing slime is a mixture of slime that is an excavated material generated by drilling a hole in the normal stabilizing liquid. It is a thing.

  The above-mentioned stabilizing liquid to be refilled into the drilling hole is used for the purpose of preventing the collapse of the hole wall in general civil engineering excavation work and for the purpose of conveying excavated earth and sand, and the quality of the stabilizing liquid has its specific gravity, viscosity, and pH. It is obliged to stabilize by managing.

  In the construction of cast-in-place piles as described above, slime remains at the bottom of the drilling hole if sufficient replacement cannot be performed during the process of removing the stabilizing liquid containing slime in the drilling hole and replacing it with normal stabilizing liquid. If concrete is placed on the bottom of the hole where slime accumulates, the slime is mixed with the concrete, so that it is not possible to obtain sufficient pile bottom support force. A serious situation will occur.

  For this reason, in the construction of cast-in-place piles as described above, the slime generated in the drilling hole is removed as much as possible to the one located at the bottom of the drilling hole, and the concrete inside the drilling hole is replaced with a normal stabilizing liquid. Therefore, there has already been proposed a slime treatment method for taking out the slime inside the hole and replacing it with a normal stabilizer.

  In the conventional slime treatment method, a sand pump suspended on a support member via a flexible member such as a wire is inserted into the drilling hole, and this pump sucks up the stable liquid containing the slime in the drilling hole and removes it from the hole. At the same time, a normal stabilizing liquid is supplied into the drilling hole, and the amount of slime is determined by measuring the properties of the recovered stabilizing liquid containing the slime. Based on the measurement result, the sand in the drilling hole is determined. By controlling the position of the pump, replacement of the stable liquid containing slime in the drilling hole with the normal stable liquid is performed (for example, see Patent Document 1).

  Quality control in the above slime treatment (monitoring of completion of treatment and monitoring of muddy progress) is mainly by measuring the specific gravity of the stable liquid containing the muddy slime and assuming the amount of slime in the stable liquid containing the slime. The specific gravity of the stable liquid containing slime is mainly measured using a float type hydrometer.

  However, the measurement using the float type hydrometer has the following problems.

  1) The specific gravity value that can be measured is the specific gravity value of the liquid around the float that generates buoyancy with respect to the float, and it is difficult to accurately measure the specific gravity of substances that have sediment and poor density uniformity. It is.

  2) The measurement response is slow and lacks immediacy.

  3) It is necessary to sample an object to be measured and put it into a measuring instrument, which is difficult to incorporate into the system.

  By the way, the slime contained in the stabilizing solution is not only one that dissolves or mixes in the stabilizing solution, but also has high specific gravity that precipitates in the stabilizing solution and has a large particle size. Therefore, in the specific gravity measurement of the stable liquid containing slime using the float type hydrometer, it is difficult to accurately and accurately measure the amount of slime in the stable liquid.

  In addition, as another treatment status management method with high responsiveness in another conventional slime treatment, there is a method of measuring the amount of sand in the stable liquid by measuring the specific resistance value of the stable liquid using an electric specific resistance sensor. (For example, refer to Patent Document 2).

  In this method as well, solids with different electrical properties such as sand, gravel, and silt, which are drilling scraps, float or settle regardless of the content ratio in the stable liquid containing slime that is pumped from the drilling hole. It is difficult to accurately measure and define the ratio of drilling scrap contained in the stable liquid in a one-to-one correspondence from the measured electrical resistivity of the stable liquid containing slime. In addition, it is impossible to determine its content, and after conducting a preliminary survey of the soil to be subjected to slime treatment, it is measured after estimating the proportion of sand contained in the stable liquid with approximate assumptions. There is a problem that it is only possible to estimate the amount of sand contained in the stabilizing liquid by separately measuring the target stabilizing liquid volume or its flow rate.

  Since the quality control of the stable liquid has the above-mentioned incomplete measurement factors, in addition to the measurement of specific gravity and electrical resistivity, the observation of the mud cake when the stable liquid containing the sampled slime is filtered and the operator Uses weights to manage the quality while performing multiple observations and evaluations, such as sensibility evaluation of the amount of residual slime in the drill hole bottom.

Japanese Patent No. 4113504 JP-A-2005-351121

  By the way, the above-mentioned slime treatment method judges the substitution situation of the slime according to the local slime properties limited in time and the position of the mud in the drilling hole, so the slime distribution in the drilling hole The situation cannot be grasped, and the control of the pumping position becomes a hit-by-spot formula only by judging the properties at the pumping position, and it is improved in terms of the accuracy of the replacement work of the stable liquid containing slime and the normal stable liquid There is room.

  In addition, the quality evaluation in slime treatment allows the amount of residual slime to be quantitatively grasped because the operator hangs the weight of the bottom slime amount after slime treatment and observes the feeling of flooring only by sensitivity evaluation. In addition, since it is not known how much slime floating in the drilling hole will settle to the bottom of the hole during the elapsed time from slime treatment to concrete placement, the slime treatment quality is the amount of residual slime immediately after treatment. It is a method that cannot evaluate the amount of accumulated slime after qualitative evaluation.

  Therefore, in order to solve the above-mentioned problems, the object of the present invention is to observe the condition of the sludge while grasping the state of slime distribution in the solid-liquid two-phase state in the drilling hole, and based on the information. In addition to improving the efficiency and accuracy of the replacement work, the amount of slime that accumulates at the bottom of the hole immediately after the slime treatment and after the start of concrete pouring is quantified. Therefore, it is intended to provide a slime property management method and an automatic slime treatment apparatus that can guarantee a higher quality slime treatment, that is, safety of cast-in-place concrete piles.

  In order to solve the above-mentioned problems, the invention of claim 1 is directed to a Coriolis type mass flow meter that has at least the density of the density and the mass flow rate or the volume flow rate of the stable liquid containing slime sucked from the drilling hole by the mud pumping means. And the like, and the slime property in the stable liquid and the stable solution or the mixed property thereof is sequentially managed based on the measurement results.

  The Coriolis mass flowmeter has high measurement responsiveness, and can measure the density and mass flow rate of stable liquid containing slime in the pumped mud in a solid-liquid two-phase state containing sediment and suspended solids. Sampling out of the path becomes unnecessary.

  Also, by measuring the flow rate together with the density measurement, it is possible to measure the mass of the stable liquid (slime mass measurement), more accurately measure the amount of slime discharged from the borehole, and reduce the amount of slime remaining in the borehole. Can be assumed.

  Furthermore, by recording and managing the properties of the stable liquid in time series, it becomes possible to manage the construction of the slime treatment process, and by displaying the slime properties in real time, the operator can quantitatively evaluate and judge the treatment process. Become.

  In addition to the Coriolis type mass flow meter, the density of the stable liquid containing slime is provided with a stable liquid conveyance path with a known volume in the pumping path, and the stable liquid containing slime that passes through the predetermined volume space. It is also possible to measure the mass of the liquid and measure the density of the measurement target using a known volume, and it is also possible to simultaneously measure the flow rate of the same path using a general-purpose flow meter.

  In the invention of claim 2, when there is a time difference between the timing of pumping and the property measurement by the pumping means, the length of the stable liquid containing slime from the pumping means to the property measuring means and the measured flow velocity are used. The time lag is calculated, the time lag information and the property measurement information are associated with each other, managed and recorded as time series information at the time of muddying, and displayed and output by the management information output means.

  The slime property management device for measuring the stable liquid in the above-mentioned drilling hole and the slime property in the stable liquid or a mixed property thereof includes a mud means, a slime property measuring means, a slime property management means, and a slime property output means. By measuring and displaying the property of the stable liquid containing the slime sucked from the hole in real time, the quality control of the stable liquid can be made immediate and highly simple.

  Here, grasping the behavior of the slime property at the position of the mud means in time series monitors the variation of the slime property in the drilling hole. In particular, if the slime properties to be mud are uneven or if the amount of mud pumped by the mud means changes, the flow rate of the stabilized liquid will also vary. There may be a difference between the time-series data of the measured values and the time-series data at the mud position, and it is necessary to correct the time lag in order to accurately grasp the slime distribution in the hole.

  The invention according to claim 3 is the slime property measuring method according to claim 1 or 2, wherein the position information of the muddy means when the muddy means is moved by the moving means is measured and managed by the muddy position information managing means. The slime property information and the mud position information at the time of mud management managed in the above are managed in association with the information management means, and this is also displayed or output together by the management information output means.

  According to the invention of claim 4, the slime property information obtained by the slime property management method according to any one of claims 1 to 3 is obtained by inputting the shape of the drilling hole to be subjected to slime processing. The purpose is to grasp the slime distribution in the drilling hole.

  According to a fifth aspect of the present invention, the distance measuring means provided in the vicinity of the mud lifting means measures the horizontal plane distance to an obstacle such as a side wall of the drill hole at the pump mud position, and actually measures the position of the mud in the drill hole. In this way, the slime property information is associated with the muddy depth and the muddy water plane position and managed by the 3D slime property management means.

  The ultrasonic hole wall measuring means is a quality evaluation device in a drilling hole by attaching it to the pumping means together with the slime property measuring means, and measures the shape of the drilling hole by settling in the drilling hole, By combining slime property management information with the side wall measurement process, which is a quality control process that is typically performed in cast-in-place pile construction, quality control in the drilling hole can be performed with high accuracy.

  The invention of claim 6 is the stable liquid amount containing the slime that has been measured and controlled by the slime property management means according to any one of claims 1 to 5, and a new stable liquid to be injected into the hole. By measuring either the properties and the amount or the liquid level height of the stable liquid in the hole, the amount of slime that has been pumped up is measured, and at the same time, the amount of the stable liquid in the hole is monitored, thereby collapsing the hole. Is to prevent.

  The invention of claim 7 uses the slime property management method according to any one of claims 1 to 6 to determine the slime treatment status based on property information of a stable liquid containing slime sucked by the mud pumping means. Thus, based on this determination, the moving means is operated to control the position of the mud lifting means.

  The invention of claim 8 is based on the assumption of the natural sedimentation amount of the floating slime amount in the borehole based on the 3D slime property distribution in the borehole and the elapsed time from the completion of the slime treatment to the concrete placement. Assuming the amount of residual slime at the bottom of the concrete when pouring concrete, the means for lifting the mud by moving means is based on whether or not the slime quality at the time of pumping is a slime property that keeps the amount of residual slime below a predetermined value. This controls the position of the mud.

  The slime settling time is calculated by using the slime settling amount estimation means, adding the estimated value of the natural slime settling amount from after the slime treatment to the concrete placing, and designing the moving path of the mud position, A slime treatment is performed assuming the amount of residual slime immediately before.

  The invention of claim 9 is a pumping means for sucking a stable liquid containing slime from the bore, a transport path for transporting the stable liquid containing sucked slime, and the density and mass of the stable liquid containing the slime being transported. Property measuring means for measuring at least density of flow rate or volume flow rate, slime property management means for managing / recording measurement information in time series, and management information output means for displaying / outputting recorded / managed property information It is structured.

  According to the tenth aspect of the present invention, when there is a time difference between the timing of the mud pumping and the property measurement timing of the mud pumping means, the pumping speed of the stable liquid containing the slime from the pumping mud means to the property measuring means and the flow velocity are increased. Time lag calculation means for calculating the time lag of mud and property measurement, slime property management means for associating property measurement information and time lag information, managing and recording as time series information of mud, and displaying the managed and recorded property information It has a structure comprising management information output means for outputting.

  The invention of claim 11 is a moving means for moving the mud lifting means, a position information management means for measuring and managing position information of the mud moving means moved by the moving means, and slime property information at the time of mud lifting. The structure includes slime property management means for recording and managing the mud position information and management information output means for displaying and outputting the slime property information and the mud position information together.

  The invention of claim 12 associates construction information input means for inputting shape information such as depth and diameter of a drilling hole for slime processing, 3D coordinate position in the drilling hole, and slime properties at each position in the drilling hole. Thus, the structure is provided with 3D slime property management means for spatially recording and managing the slime distribution in the hole.

  A thirteenth aspect of the present invention provides a distance measuring means for measuring a horizontal plane distance to the side wall of the drilling hole at a pumping position provided in the vicinity of the pumping means, and a measured slime position horizontal plane distance information and a pumped mud depth information. The structure includes 3D slime property management means for recording and managing in association with the property information.

  According to the fourteenth aspect of the present invention, the amount of the stable liquid containing the mud that has been measured and controlled by the slime property management device according to any one of the ninth to thirteenth aspects and the injection into the hole by the injection stable liquid measuring means. The amount of stable liquid in the hole is estimated at the same time as the amount of slime that has been pumped up is estimated based on the liquid level height of the stable liquid in the hole. Is to prevent the drilling from collapsing.

  The invention of claim 15 uses the slime property management device according to any one of claims 9 to 14, and judges the slime treatment status based on the property information of the stable liquid containing the slime sucked by the mud means. The moving means is operated to control the position of the mud lifting means.

  According to the sixteenth aspect of the present invention, the determination of the slime treatment status in the slime property management apparatus according to the fifteenth aspect is performed using the slime property management means and the slime sedimentation amount estimation means, and the 3D slime property distribution in the drilling hole and the concrete from the end of the slime treatment. By assuming the natural sedimentation amount of the floating slime amount in the drilling hole according to the elapsed time until pouring, the amount of residual slime at the bottom of the concrete during casting is assumed, and the amount of residual slime is determined by the property of the mud slime during pumping. The structure is such that the position of the mud lifting means is controlled on the condition whether or not the slime property is less than or equal to a predetermined value.

  Here, the method of visualizing the mud condition with the slime property management device is a stable method that includes the slime that has been submerged with the sand pump inserted into the drilling hole and activated by the property measuring means installed in the mud path. This is performed by measuring the density of a liquid, that is, a solid-liquid two-phase fluid containing precipitates or in a mixed state, or density and mass flow rate or volume flow rate. The situation can be grasped, and based on this, it is possible to efficiently control the mud pumping means when removing slime.

  Further, by measuring PH and viscosity at the time of measuring the stable liquid containing the slime, it is possible to measure and monitor general quality control parameters of the stable liquid in real time.

  Based on the measurement information obtained by actually measuring the slime properties in the mud as described above, the automatic control means and the moving means of the mud means are controlled, so that the stable liquid containing the slime in the drilling hole and the normal stable liquid. Can be automatically and efficiently performed, and by grasping the properties of the hole before processing, an effective slime processing step can be designed and automatically controlled.

  In addition, by measuring both the shape of the drilling hole for slime treatment and the physical properties of the stable liquid replenished during the treatment and the stable liquid containing the mud, it is possible to calculate the amount of slime discharged outside the hole. By understanding the distribution of slime in the drilling hole in 3D, the slime processing construction information such as the time to concrete placement after slime processing is input to the automatic control means, so that the settling slime at the time of concrete placement We know the quantity and can build high quality cast-in-place concrete piles.

  According to this invention, since the density of the stable liquid containing slime, that is, the density of the stable liquid in a solid-liquid two-phase state containing precipitates, can be monitored in real time, the quality control of the highly responsive stable liquid can be performed.

  In addition, the physical properties of the stable liquid containing the slime sucked from the borehole was measured by the slime physical property measuring means, and based on the evaluation of the physical properties of the measured stable liquid containing the slime, By evaluating, the mud position of the mud lifting means located in the drilling hole is moved, so when removing the slime in the drilling hole, the mud lifting means while immediately judging the slime status in the drilling hole The slime can be removed efficiently and reliably by moving the position of the mud, and the amount of slime that accumulates at the bottom of the hole immediately after the slime treatment and until the start of concrete pouring is quantitatively assumed. Therefore, higher quality slime treatment can be realized and the safety of cast-in-place concrete piles can be guaranteed.

Explanatory drawing which shows schematic structure of automatic slime processing equipment Block diagram showing outline of components of slime processing equipment Explanatory drawing which shows the implementation state of the slime processing method Perspective view of measuring means using a load cell as an example of slime property measuring means The perspective view which shows the relationship between a mud lifting means, its moving means, and a hole wall measuring means (A) is a distribution diagram of the slime distribution before and after the slime treatment at each depth in the drilling hole, and (b) is an explanatory diagram showing the behavior of the measured slime properties in the pumping in time series. Flow chart showing the process for measuring the properties of the stable liquid in the drilling hole in advance Flow chart showing the steps of the slime treatment method for removing slime from the stabilizing liquid in the drilling hole

  Embodiments of the present invention will be described below with reference to the accompanying drawings.

  This invention, in the construction of cast-in-place concrete piles, observes the condition of the mud while grasping the condition of the slime distribution in the hole, and controls the means for lifting the mud based on the information, thereby And a slime property management method and an automatic slime processing device that can improve the efficiency and accuracy of the replacement work of the stabilizing liquid and ensure the higher quality slime processing, that is, the safety of cast-in-place concrete piles.

  Here, the pumping means employs a sand pump (submersible pump) or an air lift system, and slime is drilling waste generated in drilling holes such as sand, silt, gravel, etc. Is a solution (heavy liquid) in which bentonite, water, CMC, and the like are mixed, and prevents the occurrence of collapse of the inner peripheral surface of the hole by supplying it into the hole.

  First, FIG. 1 and FIG. 3 show an example of a drilling hole excavated in the ground for construction of cast-in-place concrete piles, etc., and an example of a pumping device that removes slime in this drilling hole and replaces it with a normal stabilizing liquid. The hole 1 has a predetermined hole diameter and a depth at which the hole bottom reaches the support ground, and the inner periphery of the upper end is protected by a stand pipe 2.

  The slime property measuring means (mass flow meter) 3 for measuring the physical properties of the stable liquid containing the slime that has been pumped in the above-described mud pumping unit is a pumping path for transporting the stable liquid containing the slime that has been pumped from the bore 1. The physical properties of the stable liquid containing the slime that is arranged in No. 4 and transported by mud is measured in real time.

  Here, the measuring means 3 used for the physical property measurement uses a Coriolis type mass flow meter or a load cell 5 that measures the mass of the stable liquid that passes through the predetermined pipe serving as the pumping path 4 in FIG. Is measured separately with a flow meter 6 to simultaneously measure the density and flow rate of the measurement target. As shown in FIG. 2, the measurement result is a slime property management means such as a general-purpose computer equipped with a PLC and a monitor. 7 is managed and recorded in association with the time series, and then output to the slime property management information output means 8 to be output to a medium such as a display or paper.

  The slime property measuring means 3 calculates the mass flow rate / volume flow rate by measuring the density and flow velocity of the stable liquid containing the slime sucked from the drilling hole 9 by the pumping means 9, and based on these measurement results. The slime property management means 7 and the slime management information output means 8 sequentially manage the stable liquid, the slime properties in the stable liquid, or the mixed properties thereof.

  The stable liquid conveyance path length from the mud means 9 to the slime property measuring means 3 is input to the PLC using the input device to the PLC and stored and managed. Based on the flow rate of the carrier stabilizing liquid obtained by the property measuring means 3, the time lag between the mud and the measurement is calculated, and the density information managed by the PLC is converted into time series information at the timing of the mud and stored. Output to the display.

  FIG. 1 shows a slime automatic mud lifting device equipped with a slime property management device, FIG. 2 shows its constituent elements in a block diagram, and FIG. 3 shows an arrangement image of mud lifting means, a path and property measuring means.

  The slime automatic mud lifting device of FIG. 1 has a wire take-up winch 11 for a wire 10 that suspends a mud pumping means 9 using a sand pump on the outside of the upper end of the stand pipe 2, and an electric wire for supplying power to the mud pumping means 9. A cable take-up drum (not shown) and a hose take-up reel 12 connected to the discharge port of the pumping means 9 are provided.

  The above-described slime automatic mud lifting device rotates the base frame portion 13 in which the components shown in FIG. 2 are turned, thereby moving the mud lifting means 9 horizontally and winding the hanging wire 10 of the mud lifting means 9. The pumping means 9 is moved up and down by driving. Encoders are arranged in the actuators of the respective drive units so that the drive amount can be measured in real time, and the moving means 14 is constituted by these.

  With the above-described configuration, the position of the mud position is the muddy position information management means 15 having a drive signal from an encoder disposed in each actuator of the moving means 14, and is associated with the slime property information of the muddy position by an information management device. Records are managed by a certain slime property management means 7.

  Note that the horizontal movement and vertical movement of the swirling means 9 turning and advancing and retreating can also be performed manually, but using an electric motor and a mechanism such as a rack or pinion, the horizontal movement and vertical movement are automatically controlled. It is desirable to make it move.

  FIG. 7 shows an example of the implementation of the slime property management method of the present invention in which the mud lifting means 9 of the above-described slime automatic mud lifting device is controlled to pump up the slime in the drilling hole 1 and the automatic slime treatment method using the same. FIG. 6 shows an example of the slime property management method.

  As shown in FIG. 2, the slime property management device includes a mud lifting means 9, a slime property measuring means 3, a time lag calculating means 16, a hole wall measuring means 17, a slime property management means 7, and a mud position information. Management means 15, moving means 14 for moving the muddy position, manual input means 18 for manually operating the muddy position, automatic control means 19 for controlling the muddy position, slime distribution estimating means 20, and construction It comprises an information input means 21, a slime property management information output means 8, a slime sedimentation amount estimation means 22, a liquid level measurement means 23, and an injection stabilizing liquid measurement means 24. At least the density of the stable liquid containing the slime sucked from the hole 1 by the mud lifting means 9 and any one or more of the flow velocity, mass flow rate, and volume flow rate are measured, and these measurement results are sent to the slime property management means 7. It is adapted to the force.

  The slime property management means 7 associates the slime property management information with the muddy position information, estimates the slime distribution status in the drilling hole 1, and moves the muddy means 9 and then moves the slime property information based on the slime property information. By determining the efficiency of pumping at that position, the position of pumping mud 9 is controlled.

  FIG. 5 measures the slime property information for each drilling depth at the same time as the shape data of the drilling hole 1 using the ultrasonic hole wall measuring mechanism as the hole wall measuring means 17, and uses this as the drilling quality control information. It is managed by the slime property management means 7.

  By attaching the ultrasonic hole wall measuring means 17 so as to move integrally with the mud lifting means 9, the horizontal position of the mud lifting in the drilling hole 1 can be grasped by actual measurement. At the same time, it becomes a quality evaluation device for the side wall and the stabilizing liquid in the drilling hole 1, and by measuring the shape of the drilling hole 1 by settling in the drilling hole 1 and inputting this into the slime property management means 7, By combining slime property management with the side wall process, which is a quality control process that is typically performed in cast-in-place pile construction, quality control within the drilling hole can be performed with high accuracy.

  Before the slime treatment, the slime property measurement in the hole 1 is carried out by the slime property measuring means 3 while the sand pump as the mud pumping means 9 is put into the hole 1 and allowed to settle before the slime treatment. By measuring the physical properties of the slime at each depth and recording the slime properties at each depth by the pore slime distribution estimating means 20, as shown in FIG. You can pump mud while grasping the distribution.

  As shown in FIG. 2, the output from the slime property management means 7 is input to the automatic control means 19, and the moving means 14 of the mud means 9 is controlled by the position control information from the automatic control means 19. The mud means 9 is moved.

  The slime described above is a mixture of sand, gravel and clay silt generated by excavating the borehole 1, and a normal stabilizer is composed of bentonite, CMC and water. What is the stabilizer containing the slime? The slime and the stable liquid are mixed, and the physical properties (properties) of the stable liquid containing the slime are the density, flow velocity, mass flow rate, volume flow rate, specific gravity, and viscosity of the stable liquid containing the slime.

  The slime property measuring means 3 is installed, for example, in the middle of the pumping mud path 4 for sending a stable liquid containing slime to the slime treatment device, using a Coriolis mass flow meter or a physical property measuring sensor shown in FIG. For each depth of the drilling hole 1, the physical properties of the stable liquid containing the slime sucked up by the mud lifting means 9 are measured in real time, and the measurement information is input to the slime property management means 7, and the necessary amount of mud for the slime treatment is calculated. In addition to calculation, based on the evaluation of the physical properties of the stable liquid containing slime and the calculation result of the required amount of mud, it is compared and evaluated with the depth of mud obtained by the mud lifting means 9 and the target physical property value for each horizontal position. Based on the value, the automatic control means (PLC) 19 inputs the position control information to the mud position information management means 15, and inputs the operation information of the mud position information management means 15 to the movement means 14. To move .

  The above-mentioned treatment target physical property value is an index indicating the effective position of the mud pumping means 9 during the pumping, based on the slime distribution in the hole 1 and the discharge capacity of the mud pumping means 9. Basically, the vertical movement and horizontal movement of the mud lifting means 9 are controlled manually or automatically.

  In addition, although the distance which arises between the lifting mud means 9 and the slime property measurement means 3 incorporated in the conveyance path | route 4 becomes a time lag of the lifting mud and measurement, by measuring the flow rate of this distance and the stable liquid containing slime, The time lag can be corrected, and the slime distribution status and slime processing status in the hole 1 can be quantitatively observed.

  The effective position of the mud lifting means 9 in the slime treatment process is determined based on the slime distribution in the hole 1 and the discharge capacity of the mud lifting means 9. The vertical movement and horizontal movement of the head are controlled manually or automatically.

  Further, the slime property management means 7 calculates the slime amount before processing calculated by measuring the slime physical properties of the entire depth of the drilling hole 1 before processing, the slime amount in the drilling hole 1 when concrete is placed, The amount of slime pumped from the borehole 1, the amount of slime contained in the stabilizing liquid replenished in the borehole 1 during processing, and the physical properties of the slime of the entire depth of the borehole 1 when the pumping means 9 is pulled up. The amount of slime after the treatment to be measured and the amount of sedimented slime from this treatment to the time of placing the concrete are calculated.

  Regarding the natural sedimentation of slime from the above slime treatment to the time of concrete placement, there are generally mathematical models that show solid precipitation behavior in solid-liquid two phases (Navies Stokes etc.), and concrete placement using these The slime sedimentation amount of the elapsed time until is calculated and input to the slime property management unit 7 by the slime sedimentation amount estimation unit 22 via the slime distribution in the hole 1 estimation unit 20.

  The automatic slime processing apparatus shown in FIG. 2 uses the in-hole slime distribution estimation means 20 for estimating the in-hole slime distribution and the construction information input means 21, and inputs the construction information to the in-hole slime distribution estimation means 20. Prior to processing, slime that actually measured the construction information (drilling shape, concrete placement time, replenishment stabilizing liquid properties, replenishment inflow amount) and slime properties for each depth of drilling hole 1 to be constructed. The movement path of the mud position of the mud lifting means 9 is designed on the basis of the property measurement value, and automatic control is performed to move the mud lifting means 9 to a position where the mud efficiency is good. .

  The slime sedimentation amount estimation means of the automatic slime treatment apparatus shown in FIG. 2 is interconnected with the in-hole slime distribution estimation means 20, and before the slime treatment construction, in addition to the construction information already known, the concrete after the slime treatment Based on the time until placement, an assumed value of the amount of spontaneous sedimentation slime in the borehole 1 over time is added, so that slime treatment can be performed assuming the amount of residual slime immediately before concrete placement.

  Next, the slime property management and the automatic mud lifting method using the slime automatic mud lifting device of the present invention will be described with reference to the drawings and the flowcharts of FIGS.

  As shown in FIGS. 1 and 3, a mud lifting device is set to the drilling hole 1 excavated in the ground, and the hose discharge port connected to the discharge port of the mud lifting means 9 is installed on the ground. The slime treatment apparatus is connected by the mud path 4 and the slime property measuring means 3 is installed in the middle of the mud path 4.

  First, the suspended mud lifting means 9 is settled in the bore 1 by lowering the winch 11, and the physical property value of the stable liquid measured by the slime property measuring means is calculated based on the depth of the lifting mud means 9 and the lifting mud means 9. Is measured by the ultrasonic hole wall measuring means 17 provided in the periphery of the slab, is managed together with the position of the mud in the drilling hole, and is input to the slime property management means 7. And processing target property values for each horizontal position are calculated.

  Next, the pumping means 9 is moved to a depth where the slime property is high in the drilling hole 1, the mud is pumped up, the mud is pumped until the slime slime property reaches a predetermined value, and then the pumping mud position having a high slime property is reached. Repeatedly moving the pumping means 9 and pumping the mud again.

  When the pumping means 9 is allowed to settle in the stable liquid in the drilling hole 1, the discharge of the stable liquid containing slime is started, and the stable liquid containing the slime pumped up to the ground passes through the pumping mud path 4 and the slime. A new stabilizing liquid is supplied to the cutting hole 1 from the slime processing apparatus via the stabilizing liquid transport path 25 (see FIG. 3).

  The stabilization liquid containing slime flowing through the pumping path 4 measures the density and flow velocity by the property measuring means 3 and simultaneously measures the mass flow rate or volume flow rate, and the property measurement results are sequentially managed by the slime property management means 7. The

  Also, the time lag information is converted into slime property management means 7 by time lag calculation means 16 for calculating the time lag of the mud and property measurement based on the transport path length and flow velocity of the stable liquid containing slime to the lifting mud means 9 and the property measuring means 3. The property measurement information and the time lag information are associated with each other, managed and recorded as time series information of the mud, and displayed and output by the management information output means 8.

  In the slime property management means 7, the slime distribution information based on the measurement value by the slime distribution estimation means 20, the drilling shape and concrete placement time information by the construction information input means, and the slime sedimentation amount estimation means 22 in advance. The slime settling amount information of the concrete placing time from the end of the slime treatment is input, and further, the measured value of the liquid level in the drilling hole 1 and the property information of the injection stabilizing liquid are input.

  Based on such various information, the slime property management means 7 calculates the movement path of the mud position of the mud lifting means 9 and inputs the result to the automatic control means 19. By operating the moving means 14 via the mud position information management means 15 and performing automatic control for moving the mud means 9 to a position where the mud efficiency is good, the slime in the drilling hole 1 is efficiently removed and injected. Replacement with a stabilizing solution is performed.

DESCRIPTION OF SYMBOLS 1 Drilling hole 2 Stand pipe 3 Slime property measurement means 4 Pumping mud 5 Load cell 6 Flow meter 7 Slime property management means 8 Slime property management information output means 9 Lifting means 10 Wire 11 Wire winding winch 12 Hose winding reel 13 Base frame portion 14 Moving means 15 Mud position information managing means 16 Time lag calculating means 17 Hole wall measuring means 18 Manual input means 19 Automatic control means 20 Slime distribution estimating means 21 Construction information inputting means 22 Slime sedimentation amount estimating means 23 Liquid level measurement Means 24 Means for Measuring Injection Stabilizing Solution

Claims (16)

  The stable liquid containing the slime sucked by the pumping means is transported from the drilling hole through the transport path, and at least the density of the stable liquid containing the slime being transported and the mass flow rate or the volume flow rate are measured by the property measuring means. A slime property management method in which the property measurement information is managed and recorded in time series by the slime property management means, and the managed and recorded property information is displayed and output by the management information output means.   If there is a time difference between the timing of the mud pumping and the property measurement by the pumping means, the time lag is calculated from the transport path length of the stable liquid containing slime from the pumping means to the property measuring means and the measured flow velocity. The slime according to claim 1, wherein the information and the property measurement information are associated with each other, managed and recorded by the slime property management means as time-series information at the time of mud, and the managed and recorded property information is displayed and output by the management information output means. Property management method.   The position information of the mud lifting means when the mud lifting means is moved by the moving means is measured and managed by the mud position information managing means, and is managed by the slime property measuring method according to claim 1 or 2. The slime property management method according to claim 1, wherein the slime property information and the mud position information are managed in association with each other by the slime property management unit, and are displayed or output together by the management information output unit.   The depth and hole diameter of the drilling hole to be processed are input to the 3D slime property management means as 3D shape information based on the design information, and the 3D slime property management means uses the 3D shape in the hole and each position in the hole. 4. The slime property management method according to claim 1, wherein the slime property is recorded and managed in association with each other.   The distance measuring means provided in the vicinity of the above-mentioned mud lifting means measures the horizontal plane distance to obstacles such as the hole side wall at the pumping mud position, and the measured mud position horizontal plane distance information is the depth information and slime property The slime property management method according to any one of claims 1 to 4, wherein the slime property management means manages the information in association with information.   Using the slime property management method according to any one of claims 1 to 5, in addition to the stable liquid amount containing the mud that has been mud, the density of the newly injected stable liquid and the injected stable liquid amount or The slime property management method of measuring at least one of the stable liquid replacement amount in the drilling hole or the amount of the mud slime by measuring at least one of the stable liquid level height in the drilling hole.   By using the slime property management method according to any one of claims 1 to 6, this judgment is made by judging the slime treatment status based on the property information of the stable liquid containing the slime sucked by the mud pumping means. A slime treatment method in which the moving means is operated to control the position of the mud lifting means.   Slime treatment status is determined by assuming the natural sedimentation amount of floating slime in the drilling hole based on the 3D slime property distribution in the drilling hole and the elapsed time from the completion of the slime treatment to the concrete casting. The bottom mud slime property is assumed on the basis of the bottom residual slime amount, and the mud position of the mud means is controlled on the condition that the slime slime property at the time of mud pumping is a slime property that makes the residual slime amount below a predetermined value. The slime processing method of description.   A mud pumping means for sucking a stable liquid containing slime from the inside of the drilling hole, a transport path for transporting the stable liquid containing sucked slime, and at least of the density and mass flow rate or volume flow rate of the stable liquid containing the slime being transported A slime property management device comprising property measuring means for measuring density, slime property managing means for managing / recording measurement information in time series, and management information output means for displaying / outputting recorded / managed property information.   When there is a time difference between the timing of the mud pumping and the property measurement, the time lag between the pumping mud and the property measurement is determined by the transport path length and flow rate of the stable liquid containing the slime from the pumping device to the property measuring means. Time lag calculating means for calculating, slime property managing means for associating property measurement information and time lag information, managing and recording as time series information of mud, and management information output means for displaying and outputting the managed and recorded property information The slime property management apparatus according to claim 9 provided.   Correlating the moving means for moving the above-mentioned mud lifting means, the position information management means for measuring and managing the position information of the mud means moved by this moving means, and the slime property information and the position information for raising the mud The slime property management device according to claim 9 or 10, further comprising: a slime property management unit that records and manages the management information, and includes a management information output unit that displays and outputs the slime property information and the mud position information together.   Construction information input means for inputting 3D shape information based on the depth and diameter of the drilling hole to perform slime processing, and 3D slime property management means for recording and managing the 3D shape in the drilling hole and the slime properties at each position in the drilling hole. The slime property management apparatus according to any one of claims 9 to 11.   Distance measuring means for measuring the horizontal plane distance to the side wall of the drilling hole at the pumping position provided in the vicinity of the pumping means, and the measured pumping position horizontal plane distance information and pumping depth information are recorded in association with the slime property information. The slime property management apparatus according to any one of claims 9 to 12, further comprising 3D slime property management means for management.   Using the slime property management device according to any one of claims 9 to 13, in addition to the amount of stable liquid that has been mud, the density of the stable liquid newly injected into the drilling hole and the injected stable liquid amount or hole By measuring at least one of the inner stable liquid level height, the liquid level measuring means for estimating at least one of the stable liquid replacement amount in the drilling hole or the amount of the mud slime and the injection stable liquid measuring means are provided. Slime property management device.   The slime property management device according to any one of claims 9 to 14 is used to determine the slime treatment status based on the property information of the stable liquid containing the slime sucked by the mud pumping means. A slime treatment device designed to control the mud position.   The determination of the slime treatment status in the slime treatment apparatus according to claim 15 is based on the assumption of the natural sedimentation amount of the floating slime amount in the borehole based on the 3D slime property distribution in the borehole and the elapsed time from the completion of the slime treatment to the concrete placement. Assuming the amount of residual slime at the bottom of the concrete when pouring the concrete, it is necessary to determine whether or not the lifting mud slime property at the time of mud is a slime property that makes the residual slime amount below a predetermined value. A slime treatment device designed to control the mud position.

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