CN116609395A - Method for determining depth and thickness of vertical separation wall - Google Patents

Method for determining depth and thickness of vertical separation wall Download PDF

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CN116609395A
CN116609395A CN202310236191.0A CN202310236191A CN116609395A CN 116609395 A CN116609395 A CN 116609395A CN 202310236191 A CN202310236191 A CN 202310236191A CN 116609395 A CN116609395 A CN 116609395A
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data
depth
measurement
barrier wall
inversion
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王京
刘登峰
于东雪
闫利刚
刘佳炜
毛德强
马新民
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Beijing Zhongyan Dadi Environmental Technology Co ltd
Shandong University
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Shandong University
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    • GPHYSICS
    • G01MEASURING; TESTING
    • G01NINVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N27/00Investigating or analysing materials by the use of electric, electrochemical, or magnetic means
    • G01N27/02Investigating or analysing materials by the use of electric, electrochemical, or magnetic means by investigating impedance
    • G01N27/04Investigating or analysing materials by the use of electric, electrochemical, or magnetic means by investigating impedance by investigating resistance
    • G01N27/041Investigating or analysing materials by the use of electric, electrochemical, or magnetic means by investigating impedance by investigating resistance of a solid body
    • GPHYSICS
    • G01MEASURING; TESTING
    • G01BMEASURING LENGTH, THICKNESS OR SIMILAR LINEAR DIMENSIONS; MEASURING ANGLES; MEASURING AREAS; MEASURING IRREGULARITIES OF SURFACES OR CONTOURS
    • G01B21/00Measuring arrangements or details thereof, where the measuring technique is not covered by the other groups of this subclass, unspecified or not relevant
    • G01B21/02Measuring arrangements or details thereof, where the measuring technique is not covered by the other groups of this subclass, unspecified or not relevant for measuring length, width, or thickness
    • G01B21/08Measuring arrangements or details thereof, where the measuring technique is not covered by the other groups of this subclass, unspecified or not relevant for measuring length, width, or thickness for measuring thickness
    • GPHYSICS
    • G01MEASURING; TESTING
    • G01BMEASURING LENGTH, THICKNESS OR SIMILAR LINEAR DIMENSIONS; MEASURING ANGLES; MEASURING AREAS; MEASURING IRREGULARITIES OF SURFACES OR CONTOURS
    • G01B21/00Measuring arrangements or details thereof, where the measuring technique is not covered by the other groups of this subclass, unspecified or not relevant
    • G01B21/18Measuring arrangements or details thereof, where the measuring technique is not covered by the other groups of this subclass, unspecified or not relevant for measuring depth
    • GPHYSICS
    • G01MEASURING; TESTING
    • G01NINVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N1/00Sampling; Preparing specimens for investigation
    • G01N1/02Devices for withdrawing samples
    • G01N1/04Devices for withdrawing samples in the solid state, e.g. by cutting
    • G01N1/08Devices for withdrawing samples in the solid state, e.g. by cutting involving an extracting tool, e.g. core bit
    • GPHYSICS
    • G01MEASURING; TESTING
    • G01VGEOPHYSICS; GRAVITATIONAL MEASUREMENTS; DETECTING MASSES OR OBJECTS; TAGS
    • G01V3/00Electric or magnetic prospecting or detecting; Measuring magnetic field characteristics of the earth, e.g. declination, deviation
    • G01V3/38Processing data, e.g. for analysis, for interpretation, for correction
    • YGENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02ATECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
    • Y02A90/00Technologies having an indirect contribution to adaptation to climate change
    • Y02A90/30Assessment of water resources

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  • Environmental & Geological Engineering (AREA)
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Abstract

本发明公开了一种确定竖向阻隔墙深度及厚度的方法,包括钻孔取样检测、布设高密度测线、测量参数设置、数据采集、数据解译、反演结果解译。该确定竖向阻隔墙深度及厚度的方法竖向阻隔墙多应用于污染场地阻隔管控或搭配修复技术使用,可兼具临时性和永久性修复功能,适用于大体量的工业污染场地修复,本发明得到的数据更合理可靠,为竖向阻隔墙的施工质量判断提供重要依据,确保竖向阻隔墙作为风险管控技术在环境修复领域内应用的有效性,具有极大的应用价值。

The invention discloses a method for determining the depth and thickness of a vertical barrier wall, which includes drilling sampling detection, laying out high-density measuring lines, setting measurement parameters, data collection, data interpretation, and inversion result interpretation. The method for determining the depth and thickness of vertical barrier walls. Vertical barrier walls are mostly used in the isolation and control of polluted sites or used in conjunction with restoration technology. They can have both temporary and permanent repair functions, and are suitable for the restoration of large-scale industrial polluted sites. This article The data obtained by the invention is more reasonable and reliable, which provides an important basis for judging the construction quality of the vertical barrier wall, and ensures the effectiveness of the vertical barrier wall as a risk control technology in the field of environmental restoration, which has great application value.

Description

一种确定竖向阻隔墙深度及厚度的方法A Method of Determining the Depth and Thickness of Vertical Partition Wall

技术领域technical field

本发明属于环境修复技术领域,具体涉及一种确定竖向阻隔墙深度及厚度的方法。The invention belongs to the technical field of environmental restoration, and in particular relates to a method for determining the depth and thickness of a vertical barrier wall.

背景技术Background technique

竖向阻隔墙是环境修复领域,尤其是污染场地控制与修复方向常用的风险管控措施,竖向阻隔墙多应用于污染场地阻隔管控或搭配修复技术使用,可兼具临时性和永久性修复功能,适用于大体量的工业污染场地修复。Vertical barrier walls are a common risk control measure in the field of environmental remediation, especially in the control and restoration of contaminated sites. Vertical barrier walls are mostly used in the isolation and control of polluted sites or in combination with repair technologies, and can have both temporary and permanent repair functions. , suitable for large-scale industrial pollution site remediation.

针对膨润土防渗帷幕物探探测工作,初期拟采用地表高密度电法,对典型的不同施工时间阶段的膨润土防渗帷幕进行地球物理探测,得到场地基本的背景电阻率情况和不同施工时间阶段的防渗帷幕中膨润土的电阻率响应情况,初步推断防渗帷幕中膨润土的扩散范围;后期拟采用跨孔电阻率CT方法,结合地表探测结果和现场施工情况,确定跨孔电阻率CT法的钻孔布设位置和深度,通过跨孔电阻率CT方法探测。For the geophysical exploration of bentonite anti-seepage curtains, the surface high-density electrical method is initially planned to conduct geophysical exploration on typical bentonite anti-seepage curtains at different construction time stages, and obtain the basic background resistivity of the site and the anti-seepage properties of different construction time stages. According to the resistivity response of bentonite in the seepage curtain, the diffusion range of bentonite in the anti-seepage curtain is preliminarily inferred; in the later stage, the cross-hole resistivity CT method is planned to be used, combined with the surface detection results and on-site construction conditions, to determine the borehole for the cross-hole resistivity CT method The layout position and depth are detected by the trans-hole resistivity CT method.

但是在实际应用中,对于竖向阻隔墙的厚度和深度无法精准预测,导致厚度和深度不够和严重超过,使得施工质量低,阻隔效果差。However, in practical applications, the thickness and depth of the vertical barrier wall cannot be accurately predicted, resulting in insufficient or seriously exceeded thickness and depth, resulting in low construction quality and poor barrier effect.

发明内容Contents of the invention

本发明的目的在于提供一种确定竖向阻隔墙深度及厚度的方法,以解决上述背景技术中提出的问题。The purpose of the present invention is to provide a method for determining the depth and thickness of a vertical barrier wall, so as to solve the problems raised in the background art above.

为实现上述目的,本发明提供如下技术方案:一种确定竖向阻隔墙深度及厚度的方法,包括以下步骤:In order to achieve the above object, the present invention provides the following technical solution: a method for determining the depth and thickness of a vertical barrier wall, comprising the following steps:

S1:钻孔取样检测,根据阻隔墙位置及深度,在阻隔墙两侧布设钻孔,下井管,洗井后取水样,进行多参数测试;S1: Borehole sampling inspection. According to the position and depth of the barrier wall, drill holes are arranged on both sides of the barrier wall, the well pipe is lowered, and water samples are taken after well cleaning for multi-parameter testing;

S2:布设高密度测线,沿预布设测线配置电极棒,根据测定方法配置电极,将测线与测量系统连接,同时检测接地电阻;S2: Lay out high-density measuring lines, configure electrode rods along the pre-laid measuring lines, configure electrodes according to the measurement method, connect the measuring lines to the measurement system, and detect grounding resistance at the same time;

S3:测量参数设置,根据勘测的目标、地质概况确定电极的排列方式及电极间距;S3: Measurement parameter setting, determine the electrode arrangement and electrode spacing according to the survey target and geological situation;

S4:数据采集,对工作日期、气象信息、点位坐标、电流值、电压值数据进行观测记录;S4: Data collection, observation and recording of working date, meteorological information, point coordinates, current value, and voltage value data;

S5:数据解译,将采集数据导入计算机中,对测量数据进行异常数据前期处理,对处理后的测量数据转换格式,并对测量数据进行反演,将反演结果保存;S5: Data interpretation, import the collected data into the computer, pre-process the abnormal data of the measurement data, convert the format of the processed measurement data, and invert the measurement data, and save the inversion results;

S6:反演结果解译,将反演结果解译,确定勘测目标深度、厚度。S6: Interpretation of inversion results. Interpret the inversion results to determine the depth and thickness of the survey target.

优选的是,在步骤S1中,两侧钻孔间距与竖向阻隔墙侧立面间距最少为1m,钻孔深度不小于竖向阻隔墙深度,所述井管采用PVC管,管壁采用激光割缝或钻孔,其间距约为1cm,所述多参数包括水样检测温度、pH、OPR、电阻率、TDS。Preferably, in step S1, the distance between the drilled holes on both sides and the side facade of the vertical barrier wall is at least 1m, and the depth of the drilled holes is not less than the depth of the vertical barrier wall. The well pipe is made of PVC pipe, and the pipe wall is made of laser Slits or holes are drilled at a distance of about 1 cm. The multi-parameters include water sample detection temperature, pH, OPR, resistivity, and TDS.

上述任一方案中优选的是,在步骤S2中,测量系统采用ABEM Terrameter LS 2电法仪。Preferably, in any of the above schemes, in step S2, the measuring system adopts ABEM Terrameter LS 2 electrical instrument.

上述任一方案中优选的是,在步骤S3中,所述最大供电电极距应为勘查目标物顶部埋深的4~6倍,测量电极距不大于勘查目标物的顶部埋深。Preferably, in any of the above schemes, in step S3, the maximum power supply electrode distance should be 4 to 6 times the top buried depth of the survey object, and the measurement electrode distance should not be greater than the top buried depth of the survey target.

上述任一方案中优选的是,在步骤S4中,记录工作日期及气象信息,确定并记录测线的起止点和控制点坐标,并对测线附近的地形、地表建筑物作描述,当地形坡度大于15°时,对各电极棒进行高程测量;Preferably in any of the above schemes, in step S4, record the working date and meteorological information, determine and record the start and end points of the survey line and the coordinates of the control points, and describe the terrain and surface buildings near the survey line. When the slope is greater than 15°, measure the height of each electrode rod;

根据现场状况调整测定参数,采集数据;Adjust the measurement parameters and collect data according to the site conditions;

分别采用不同观测装置完成数据采集;Different observation devices are used to complete data collection;

对于每个排列的观测,坏点总数不应超过测量总数的l%,对意外中断后的复测,应有不少于2个深度层的重测值;For each permutation of observations, the total number of bad points should not exceed 1% of the total number of measurements, and for re-measurement after unexpected interruption, there should be no less than 2 depth-layer re-measurement values;

对二极和三极观测装置,采集电压和电流值,数据处理时,另行计算出视电阻率值;当远电极极距不满足5倍以上时,在数据处理中进行远电极修正;For two-pole and three-pole observation devices, the voltage and current values are collected, and the apparent resistivity value is calculated separately during data processing; when the distance between the far electrodes is not more than 5 times, the far electrode correction is performed during data processing;

现场观测时,记录排列位置,并注明特殊环境因素的位置,同时在草图上标明。During on-site observation, record the arrangement position, and indicate the position of special environmental factors, and mark it on the sketch at the same time.

上述任一方案中优选的是,在步骤S5中,Preferably in any of the above schemes, in step S5,

(1)数据读取及检查:用数据线将保存在测量主机中的野外测量数据导入到计算机中,检查测量数据中是否有异常数据点,进行前期处理;(1) Data reading and inspection: use the data cable to import the field measurement data stored in the measurement host into the computer, check whether there are abnormal data points in the measurement data, and perform pre-processing;

(2)转换数据格式:将导入的数据转换成反演软件能识别的格式,高密度电阻率法的测量数据在转换格式时要设置测量方法、电极个数、电极距参数;(2) Convert data format: Convert the imported data into a format that can be recognized by the inversion software. When converting the format of the measurement data of the high-density resistivity method, the parameters of the measurement method, the number of electrodes, and the electrode distance must be set;

(3)反演:设定合适反演参数,对数据进行反演,并将反演的结果保存。上述任一方案中优选的是,(1)在反演过程中进行二次数据处理,包括:(3) Inversion: Set appropriate inversion parameters, invert the data, and save the inversion results. Preferably in any of the above schemes, (1) secondary data processing is performed during the inversion process, including:

①坏点剔除:在采集数据过程中,对由仪器、人为错误、外界干扰或电极接地不良产生的量值较大的虚假或突变的“尖点”数据,需进行剔除和插值替换处理,以消除或减小其对反演结果的不利影响;① Elimination of bad points: In the process of collecting data, it is necessary to eliminate and interpolate the "sharp point" data with large magnitudes generated by instruments, human errors, external interference or poor electrode grounding. Eliminate or reduce its adverse effects on the inversion results;

②带地形反演:高密度电阻率法的测量结果受地形影响较大,记录测线中有代表性点的位置和高程需做带地形数据的反演;②Inversion with terrain: The measurement results of the high-density resistivity method are greatly affected by the terrain, and the inversion with terrain data is required to record the position and elevation of representative points in the survey line;

(2)数据混合反演:采用同一种地球物理方法不同装置测定的数据,可以将测量数据融合在一起进行反演,有效提高反演结果的可靠性。(2) Data hybrid inversion: Using the data measured by different devices with the same geophysical method, the measured data can be fused together for inversion, which effectively improves the reliability of the inversion results.

本发明的技术效果和优点:该确定竖向阻隔墙深度及厚度的方法对地表高密度测线对上部区域探测,通过地表测线上电极间的电势差,计算电阻率剖面,通过对电阻率剖面进行反演计算,得到测线范围内电阻率剖面,从而达到对测线范围内地质情况探测的目的,实现竖向阻隔墙范围的圈定;跨孔高密度测线对深部区域探测,通过观测跨孔的电流、电压数据,反演获得两钻孔之间的电阻率分布断面图,然后通过对数据进行反演计算,得到探测区域电阻率剖面,从而达到对竖向阻隔墙深度范围的确定,本发明得到的数据更合理可靠,为竖向阻隔墙的施工质量判断提供重要依据,确保竖向阻隔墙作为风险管控技术在环境修复领域内应用的有效性,具有极大的应用价值。Technical effects and advantages of the present invention: the method for determining the depth and thickness of the vertical barrier wall detects the upper area of the high-density measuring line on the ground surface, and calculates the resistivity profile through the potential difference between the electrodes on the surface measuring line. Perform inversion calculation to obtain the resistivity profile within the range of the survey line, so as to achieve the purpose of detecting the geological conditions within the range of the survey line, and realize the delineation of the range of the vertical barrier wall; The current and voltage data of the borehole are inverted to obtain the resistivity distribution cross-section between the two boreholes, and then the resistivity profile of the detection area is obtained through inversion calculation of the data, so as to determine the depth range of the vertical barrier wall. The data obtained by the invention is more reasonable and reliable, provides an important basis for judging the construction quality of the vertical barrier wall, ensures the effectiveness of the vertical barrier wall as a risk control technology in the field of environmental restoration, and has great application value.

附图说明Description of drawings

图1为本发明地表高密度测线布置示意图;Fig. 1 is a schematic diagram of the layout of the surface high-density survey line of the present invention;

图2为本发明跨孔高密度测线布置示意图。Fig. 2 is a schematic diagram of the arrangement of cross-hole high-density measuring lines according to the present invention.

具体实施方式Detailed ways

下面结合附图对本发明的具体实施方式作进一步说明。在此需要说明的是,对于这些实施方式的说明用于帮助理解本发明,但并不构成对本发明的限定。此外,下面所描述的本发明各个实施方式中所涉及的技术特征只要彼此之间未构成冲突就可以相互组合。The specific embodiments of the present invention will be further described below in conjunction with the accompanying drawings. It should be noted here that the descriptions of these embodiments are used to help understand the present invention, but are not intended to limit the present invention. In addition, the technical features involved in the various embodiments of the present invention described below may be combined with each other as long as they do not constitute a conflict with each other.

在本发明的描述中,需要理解的是,术语“中心”、“纵向”、“横向”、“长度”、“宽度”、“厚度”、“上”、“下”、“前”、“后”、“左”、“右”、“竖直”、“水平”、“顶”、“底”“内”、“外”、“顺时针”、“逆时针”、“轴向”、“径向”、“周向”等指示的方位或位置关系为基于附图所示的方位或位置关系,仅是为了便于描述本发明和简化描述,而不是指示或暗示所指的装置或元件必须具有特定的方位、以特定的方位构造和操作,因此不能理解为对本发明的限制。In describing the present invention, it should be understood that the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", " Back", "Left", "Right", "Vertical", "Horizontal", "Top", "Bottom", "Inner", "Outer", "Clockwise", "Counterclockwise", "Axial", The orientation or positional relationship indicated by "radial", "circumferential", etc. is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying the referred device or element Must be in a particular orientation, be constructed in a particular orientation, and operate in a particular orientation, and therefore should not be construed as limiting the invention.

此外,术语“第一”、“第二”仅用于描述目的,而不能理解为指示或暗示相对重要性或者隐含指明所指示的技术特征的数量。由此,限定有“第一”、“第二”的特征可以明示或者隐含地包括至少一个该特征。In addition, the terms "first" and "second" are used for descriptive purposes only, and cannot be interpreted as indicating or implying relative importance or implicitly specifying the quantity of indicated technical features. Thus, the features defined as "first" and "second" may explicitly or implicitly include at least one of these features.

本发明提供了如图1-2所示的一种确定竖向阻隔墙深度及厚度的方法,包括以下步骤:The present invention provides a method for determining the depth and thickness of a vertical barrier wall as shown in Figure 1-2, comprising the following steps:

第一步:钻孔取样检测,根据阻隔墙位置及深度,在阻隔墙两侧布设钻孔,下井管,洗井后取水样,进行多参数测试。Step 1: Borehole sampling and inspection. According to the position and depth of the barrier wall, drill holes are arranged on both sides of the barrier wall, the well pipe is lowered, and water samples are taken after well cleaning for multi-parameter testing.

第二步:布设高密度测线,沿预布设测线配置电极棒,根据测定方法配置电极;将测线与测量系统连接,同时检测接地电阻。Step 2: lay out high-density measuring lines, configure electrode rods along the pre-layout measuring lines, and configure electrodes according to the measurement method; connect the measuring lines to the measurement system, and measure the grounding resistance at the same time.

第三步:测量参数设置,根据勘测的目标、地质概况等确定电极的排列方式及电极间距。The third step: measurement parameter setting, determine the electrode arrangement and electrode spacing according to the survey target, geological situation, etc.

第四步:数据采集,对工作日期、气象信息、点位坐标、电流值、电压值等数据进行观测记录。The fourth step: data collection, observe and record the working date, meteorological information, point coordinates, current value, voltage value and other data.

第五步:数据解译,将采集数据导入计算机中,对测量数据进行异常数据前期处理,对处理后的测量数据转换格式,并对测量数据进行反演,将反演结果保存。The fifth step: data interpretation, importing the collected data into the computer, pre-processing the abnormal data of the measurement data, converting the format of the processed measurement data, inverting the measurement data, and saving the inversion results.

第六步:反演结果解译,将反演结果解译,确定勘测目标深度、厚度。Step 6: Interpret the inversion results, interpret the inversion results, and determine the depth and thickness of the survey target.

适用条件如下:The following conditions apply:

(1)勘测目标物与周围介质之间存在较明显的电阻率差异;(1) There is a significant difference in resistivity between the survey target and the surrounding medium;

(2)勘测目标物在地表能够引起可测量的异常;(2) The survey target can cause measurable anomalies on the surface;

(3)勘测目标物的电测异常能从干扰背景中分辨出来;(3) The electrical abnormality of the survey target can be distinguished from the interference background;

(4)具备必要的接地条件。(4) Have the necessary grounding conditions.

第一步中:In the first step:

两侧钻孔间距与竖向阻隔墙侧立面间距最少为1m;钻孔深度应不小于竖向阻隔墙深度;井管采用PVC管,管壁采用激光割缝或钻孔,其间距约为1cm;水样检测温度、pH、OPR(氧化还原电位)、电阻率、TDS(硬度)等参数。The distance between the drilling holes on both sides and the side facade of the vertical barrier wall should be at least 1m; the drilling depth should not be less than the depth of the vertical barrier wall; 1cm; water sample testing temperature, pH, OPR (oxidation-reduction potential), resistivity, TDS (hardness) and other parameters.

第二步中:In the second step:

电极棒间距及测线长度决定所能探测的深度,间距大、测线长则能探测较深的深度,但分辨率会降低。因此需针对探测目标深度,进行初步计算,在电极棒间距及测线长度间选择最佳平衡点;正式测量前,检查各电极接地电阻与连通情况,必要时在电极棒接地处灌入水(或盐水)或以数根电极并联取代原电极棒以降低电极的接地电阻;测量系统采用ABEM Terrameter LS 2电法仪。The distance between the electrode rods and the length of the measuring line determine the depth that can be detected. The larger the distance and the longer the measuring line, the deeper the depth can be detected, but the resolution will be reduced. Therefore, it is necessary to conduct preliminary calculations for the depth of the detection target, and select the best balance point between the electrode rod spacing and the length of the measuring line; before formal measurement, check the grounding resistance and connection of each electrode, and pour water (or Salt water) or replace the original electrode rod with several electrodes in parallel to reduce the grounding resistance of the electrode; the measurement system uses ABEM Terrameter LS 2 electrical instrument.

第三步中:In the third step:

(1)电极的排列方式(1) Arrangement of electrodes

高密度电阻率法探测属于几何探测,需要依据勘测的目标、地质概况等确定合适的电极排列方式。高密度电阻率法按照不同的电极排列方式分为多种测定方式,常用的有温纳装置法、斯伦贝谢装置法(简称斯贝法)、二极装置法及偶极装置法。温纳装置与斯贝装置主要应用于地层平缓的区域做垂直剖面或测深,偶极装置主要应用于剖面勘测。The high-density resistivity method detection is a geometric detection, and it is necessary to determine the appropriate electrode arrangement according to the survey target and geological conditions. The high-density resistivity method is divided into a variety of measurement methods according to different electrode arrangements. Commonly used methods include Wenner device method, Schlumberger device method (Spey method for short), two-pole device method and dipole device method. The Wenner device and the Spey device are mainly used for vertical profile or sounding in areas with gentle strata, and the dipole device is mainly used for profile survey.

(2)电极距(2) Electrode distance

最大供电电极距至少应为勘查目标物顶部埋深的4~6倍,测量电极距应不大于勘查目标物的顶部埋深。野外测定过程中,决定探测深度的主要测定参数为:供电电极之间的极距L和测量电极之间极距a,并与测定方式有关。测定参数选择的正确与否,关系测定结果的好坏。The maximum power supply electrode distance should be at least 4 to 6 times the top buried depth of the survey target, and the measurement electrode distance should not be greater than the top buried depth of the survey target. In the field measurement process, the main measurement parameters that determine the detection depth are: the pole distance L between the power supply electrodes and the pole distance a between the measurement electrodes, and are related to the measurement method. Whether the selection of the measurement parameters is correct or not is related to the quality of the measurement results.

第四步中:In the fourth step:

(1)记录工作日期及气象信息,确定并记录测线的起止点和控制点坐标,并对测线附近的地形、地表建筑物等作适当描述,当地表高程差异明显(地形坡度大于15°时),必须对各电极棒进行高程测量,以供后面地形校正使用;(1) Record the working date and meteorological information, determine and record the coordinates of the start and end points and control points of the survey line, and make a proper description of the terrain and surface buildings near the survey line, where the difference in surface elevation is obvious (the terrain slope is greater than 15° When), the height measurement of each electrode rod must be carried out for the subsequent topographic correction;

(2)根据现场状况调整测定参数,采集数据。测定时工作人员必须注意屏幕上各电极间的通电反应,必要时调整测定参数重新测定;(2) Adjust measurement parameters and collect data according to on-site conditions. During the measurement, the staff must pay attention to the electrification reaction between the electrodes on the screen, and adjust the measurement parameters to re-measure if necessary;

(3)分别采用不同观测装置完成数据采集,切勿采用同一观测装置中的互相换算值代替另一观测装置的观测数据;(3) Use different observation devices to complete data collection, and do not use the mutual conversion value in the same observation device to replace the observation data of another observation device;

(4)对于每个排列的观测,坏点总数不应超过测量总数的l%,对意外中断后的复测,应有不少于2个深度层的重测值;(4) For each array of observations, the total number of dead pixels should not exceed 1% of the total number of measurements. For re-measurement after unexpected interruption, there should be no less than 2 re-measured values of depth layers;

(5)对二极和三极观测装置,应采集电压和电流值,数据处理时,应另行计算出视电阻率值;当远电极极距不满足5倍以上时,应在数据处理中进行远电极修正;(5) For two-pole and three-pole observation devices, the voltage and current values should be collected, and the apparent resistivity value should be calculated separately during data processing; Far electrode correction;

(6)现场观测时,应记录排列位置,并注明特殊环境因素的位置,同时应在草图上标明。(6) During on-site observation, the arrangement position should be recorded, and the position of special environmental factors should be indicated, and it should be marked on the sketch at the same time.

第五步中:In the fifth step:

(1)数据读取及检查:用数据线将保存在测量主机中的野外测量数据导入到计算机中。检查测量数据中是否有异常数据点,进行前期处理。(1) Data reading and inspection: import the field measurement data stored in the measurement host into the computer with a data cable. Check whether there are abnormal data points in the measurement data, and perform pre-processing.

(2)转换数据格式:将导入的数据转换成反演软件能识别的格式,高密度电阻率法的测量数据在转换格式时要设置测量方法、电极个数、电极距等参数。(2) Data format conversion: Convert the imported data into a format that can be recognized by the inversion software. When converting the format of the measurement data of the high-density resistivity method, parameters such as the measurement method, the number of electrodes, and the electrode distance must be set.

(3)反演:设定合适反演参数,对数据进行反演,并将反演的结果保存。(3) Inversion: Set appropriate inversion parameters, invert the data, and save the inversion results.

1)为得到更精确的反演结果,结合测量实际情况,可在反演过程中进行二次数据处理,包括:1) In order to obtain more accurate inversion results, combined with the actual measurement situation, secondary data processing can be performed during the inversion process, including:

①坏点剔除:在采集数据过程中,对由仪器、人为错误、外界干扰或电极接地不良等产生的量值较大的虚假或突变的“尖点”数据,需进行剔除和插值替换处理,以消除或减小其对反演结果的不利影响;①Bad point elimination: In the process of data collection, it is necessary to eliminate and interpolate the "sharp point" data with large magnitude and large value generated by the instrument, human error, external interference or poor electrode grounding, etc. To eliminate or reduce its adverse effects on the inversion results;

②带地形反演:高密度电阻率法的测量结果受地形影响较大,记录测线中有代表性点的位置和高程需做带地形数据的反演。②Inversion with topography: The measurement results of the high-density resistivity method are greatly affected by the topography, and the inversion with topography data is required to record the positions and elevations of representative points in the survey line.

2)数据混合反演:采用同一种地球物理方法不同装置测定的数据,可以将测量数据融合在一起进行反演,有效提高反演结果的可靠性。2) Data hybrid inversion: Using the data measured by different devices with the same geophysical method, the measured data can be fused together for inversion, which effectively improves the reliability of the inversion results.

第六步中:In the sixth step:

利用多种装置的观测结果并结合其他物化探资料、钻孔(或探井)资料、地质资料,对同源异常起因和异常源几何参数、电性参数进行相互约束、互证式综合推断解译,以提高解译精度,减少多解性。Using the observation results of various devices combined with other geophysical and geochemical prospecting data, drilling (or exploratory well) data, and geological data, carry out mutual restraint and mutual verification comprehensive inference and interpretation on the cause of the homologous anomaly and the geometric parameters and electrical parameters of the anomaly source , to improve interpretation accuracy and reduce ambiguity.

尽管上面已经示出和描述了本发明的实施例,可以理解的是,上述实施例是示例性的,不能理解为对本发明的限制,本领域的普通技术人员在本发明的范围内可以对上述实施例进行变化、修改、替换和变型。Although the embodiments of the present invention have been shown and described above, it can be understood that the above embodiments are exemplary and should not be construed as limiting the present invention, those skilled in the art can make the above-mentioned The embodiments are subject to changes, modifications, substitutions and variations.

Claims (7)

1.一种确定竖向阻隔墙深度及厚度的方法,其特征在于:包括以下步骤:1. A method for determining the depth and thickness of a vertical barrier wall, characterized in that: comprising the following steps: S1:钻孔取样检测,根据阻隔墙位置及深度,在阻隔墙两侧布设钻孔,下井管,洗井后取水样,进行多参数测试;S1: Borehole sampling inspection. According to the position and depth of the barrier wall, drill holes are arranged on both sides of the barrier wall, the well pipe is lowered, and water samples are taken after well cleaning for multi-parameter testing; S2:布设高密度测线,沿预布设测线配置电极棒,根据测定方法配置电极,将测线与测量系统连接,同时检测接地电阻;S2: Lay out high-density measuring lines, configure electrode rods along the pre-laid measuring lines, configure electrodes according to the measurement method, connect the measuring lines to the measurement system, and detect grounding resistance at the same time; S3:测量参数设置,根据勘测的目标、地质概况确定电极的排列方式及电极间距;S3: Measurement parameter setting, determine the electrode arrangement and electrode spacing according to the survey target and geological situation; S4:数据采集,对工作日期、气象信息、点位坐标、电流值、电压值数据进行观测记录;S4: Data collection, observation and recording of working date, meteorological information, point coordinates, current value, and voltage value data; S5:数据解译,将采集数据导入计算机中,对测量数据进行异常数据前期处理,对处理后的测量数据转换格式,并对测量数据进行反演,将反演结果保存;S5: Data interpretation, import the collected data into the computer, pre-process the abnormal data of the measurement data, convert the format of the processed measurement data, and invert the measurement data, and save the inversion results; S6:反演结果解译,将反演结果解译,确定勘测目标深度、厚度。S6: Interpretation of inversion results. Interpret the inversion results to determine the depth and thickness of the survey target. 2.根据权利要求1所述的一种确定竖向阻隔墙深度及厚度的方法,其特征在于:在步骤S1中,两侧钻孔间距与竖向阻隔墙侧立面间距最少为1m,钻孔深度不小于竖向阻隔墙深度,所述井管采用PVC管,管壁采用激光割缝或钻孔,其间距约为1cm,所述多参数包括水样检测温度、pH、OPR、电阻率、TDS。2. A method for determining the depth and thickness of the vertical barrier wall according to claim 1, characterized in that: in step S1, the distance between the drilled holes on both sides and the distance between the side elevations of the vertical barrier wall is at least 1m, and the drill The depth of the hole is not less than the depth of the vertical barrier wall. The well pipe is made of PVC pipe, and the pipe wall is made of laser slits or drilled holes with a distance of about 1cm. The multi-parameters include water sample detection temperature, pH, OPR, resistivity , TDS. 3.根据权利要求1所述的一种确定竖向阻隔墙深度及厚度的方法,其特征在于:在步骤S2中,测量系统采用ABEM Terrameter LS 2电法仪。3. A method for determining the depth and thickness of a vertical barrier wall according to claim 1, characterized in that: in step S2, the measurement system uses an ABEM Terrameter LS 2 electrical instrument. 4.根据权利要求1所述的一种确定竖向阻隔墙深度及厚度的方法,其特征在于:在步骤S3中,所述最大供电电极距应为勘查目标物顶部埋深的4~6倍,测量电极距不大于勘查目标物的顶部埋深。4. A method for determining the depth and thickness of a vertical barrier wall according to claim 1, characterized in that: in step S3, the maximum power supply electrode distance should be 4 to 6 times the buried depth of the top of the survey object , the distance between the measuring electrodes is not greater than the buried depth of the top of the survey target. 5.根据权利要求1所述的一种确定竖向阻隔墙深度及厚度的方法,其特征在于:在步骤S4中,记录工作日期及气象信息,确定并记录测线的起止点和控制点坐标,并对测线附近的地形、地表建筑物作描述,当地形坡度大于15°时,对各电极棒进行高程测量;5. A method for determining the depth and thickness of a vertical barrier wall according to claim 1, characterized in that: in step S4, record the working date and meteorological information, determine and record the start and end points of the survey line and the coordinates of the control points , and describe the terrain and surface buildings near the survey line, and measure the elevation of each electrode rod when the slope of the terrain is greater than 15°; 根据现场状况调整测定参数,采集数据;Adjust the measurement parameters and collect data according to the site conditions; 分别采用不同观测装置完成数据采集;Different observation devices are used to complete data collection; 对于每个排列的观测,坏点总数不应超过测量总数的l%,对意外中断后的复测,应有不少于2个深度层的重测值;For each permutation of observations, the total number of bad points should not exceed 1% of the total number of measurements, and for re-measurement after unexpected interruption, there should be no less than 2 depth-layer re-measurement values; 对二极和三极观测装置,采集电压和电流值,数据处理时,另行计算出视电阻率值;当远电极极距不满足5倍以上时,在数据处理中进行远电极修正;For two-pole and three-pole observation devices, the voltage and current values are collected, and the apparent resistivity value is calculated separately during data processing; when the distance between the far electrodes is not more than 5 times, the far electrode correction is performed during data processing; 现场观测时,记录排列位置,并注明特殊环境因素的位置,同时在草图上标明。During on-site observation, record the arrangement position, and indicate the position of special environmental factors, and mark it on the sketch at the same time. 6.根据权利要求1所述的一种确定竖向阻隔墙深度及厚度的方法,其特征在于:在步骤S5中,6. A method for determining the depth and thickness of a vertical barrier wall according to claim 1, characterized in that: in step S5, (1)数据读取及检查:用数据线将保存在测量主机中的野外测量数据导入到计算机中,检查测量数据中是否有异常数据点,进行前期处理;(1) Data reading and inspection: use the data cable to import the field measurement data stored in the measurement host into the computer, check whether there are abnormal data points in the measurement data, and perform pre-processing; (2)转换数据格式:将导入的数据转换成反演软件能识别的格式,高密度电阻率法的测量数据在转换格式时要设置测量方法、电极个数、电极距参数;(2) Convert data format: Convert the imported data into a format that can be recognized by the inversion software. When converting the format of the measurement data of the high-density resistivity method, the parameters of the measurement method, the number of electrodes, and the electrode distance must be set; (3)反演:设定合适反演参数,对数据进行反演,并将反演的结果保存。(3) Inversion: Set appropriate inversion parameters, invert the data, and save the inversion results. 7.根据权利要求6所述的一种确定竖向阻隔墙深度及厚度的方法,其特征在于:(1)在反演过程中进行二次数据处理,包括:7. A method for determining the depth and thickness of a vertical barrier wall according to claim 6, characterized in that: (1) performing secondary data processing in the inversion process, including: ①坏点剔除:在采集数据过程中,对由仪器、人为错误、外界干扰或电极接地不良产生的量值较大的虚假或突变的“尖点”数据,需进行剔除和插值替换处理,以消除或减小其对反演结果的不利影响;① Elimination of bad points: In the process of collecting data, it is necessary to eliminate and interpolate the "sharp point" data with large magnitudes generated by instruments, human errors, external interference or poor electrode grounding. Eliminate or reduce its adverse effects on the inversion results; ②带地形反演:高密度电阻率法的测量结果受地形影响较大,记录测线中有代表性点的位置和高程需做带地形数据的反演;②Inversion with terrain: The measurement results of the high-density resistivity method are greatly affected by the terrain, and the inversion with terrain data is required to record the position and elevation of representative points in the survey line; (2)数据混合反演:采用同一种地球物理方法不同装置测定的数据,可以将测量数据融合在一起进行反演,有效提高反演结果的可靠性。(2) Data hybrid inversion: Using the data measured by different devices with the same geophysical method, the measured data can be fused together for inversion, which effectively improves the reliability of the inversion results.
CN202310236191.0A 2023-03-13 2023-03-13 Method for determining depth and thickness of vertical separation wall Pending CN116609395A (en)

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN118551461A (en) * 2024-07-29 2024-08-27 深圳大学 GCL composite vertical barrier wall thickness determination method and device
CN118551461B (en) * 2024-07-29 2024-10-18 深圳大学 GCL composite vertical barrier wall thickness determination method and device

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