CN103105333B - In-situ test measuring system for cross-fault buried pipeline - Google Patents
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Abstract
本发明公开了一种跨断层埋地管线原位试验量测系统，该量测系统包括：加载控制量测装置（1）用以控制加载位错量以及垂直运动装置（13）和水平运动装置（14）的水平加载状态；应变量测装置（2）用于测量试验管线（16）的法向、切向应变反应；位移量测装置（3）用于在地表上侧观测断层作用下埋地管线的竖向和水平方向的位移反应；内压量测装置（4）用于控制试验管线（16）内的介质工作压力；主机（5）用于对加载控制量测装置（1）、应变量测装置（2）、位移量测装置（3）和内压控制装置（4）的数据整理分析后得出验证结果。本发明提出的新型埋地管线原位试验断层反应和加载控制量测系统，试验接近实际，分析结果可靠有效。
The invention discloses an in-situ test measurement system for buried pipelines across faults. The measurement system includes: a loading control measurement device (1) used to control the amount of loading dislocation, a vertical movement device (13) and a horizontal movement device The horizontal loading state of (14); the strain measuring device (2) is used to measure the normal and tangential strain responses of the test pipeline (16); the displacement measuring device (3) is used to observe The vertical and horizontal displacement response of the ground pipeline; the internal pressure measurement device (4) is used to control the working pressure of the medium in the test pipeline (16); the main engine (5) is used to control the loading of the measurement device (1), The verification results are obtained after sorting and analyzing the data of the strain measurement device (2), the displacement measurement device (3) and the internal pressure control device (4). The novel buried pipeline in-situ test fault response and loading control measurement system proposed by the invention is close to the actual test, and the analysis result is reliable and effective.
Description
技术领域 technical field
本发明涉及一种跨断层埋地管线原位试验量测系统，更具体地说是涉及一种在原位试验场地进行埋地管线断层反应的试验量测和加载控制系统，主要用于观测和监测跨断层埋地管线原位试验的过程和反应。 The present invention relates to an in-situ test and measurement system for buried pipelines across faults, and more specifically relates to a test measurement and loading control system for fault response of buried pipelines at the in-situ test site, mainly used for observation and Monitoring the process and response of in-situ testing of buried pipelines across faults.
背景技术 Background technique
埋地管线在现代化生产、生活中占有重要的位置，是重要的城市生命线工程。埋地管线系统是典型的线、网工程，不可避免地需穿越一些抗震不利或者危险的地域，跨越断层就是埋地管线不得不面临和需要解决的关键工程问题之一。跨断层埋地管线受力性能及破坏机理需要可靠准确的实际破坏数据作为研究基础，数据获取最可靠、最直接的方法即实际地震观测或者试验，而试验是实际工程应用中最行之有效的方法。现国内外采用试验手段研究跨越断层埋地管线的受力特性及其破坏机理时大多为模型试验，在实验室中进行。模型试验不可避免地带来尺寸效应、边界条件误差等问题，不能很好地反映跨越断层埋地管线的断层响应特性。原位试验可以较好地克服模型试验的不足，但在原位场地对断层加载进行实施和控制较难实现，对管线的断层反应进行地下观测及数据采集也存在一定的困难。 Buried pipelines occupy an important position in modern production and life, and are important urban lifeline projects. The buried pipeline system is a typical line and network project, which inevitably needs to cross some unfavorable or dangerous areas for earthquake resistance. Crossing faults is one of the key engineering problems that buried pipelines have to face and need to solve. The mechanical performance and failure mechanism of buried pipelines across faults require reliable and accurate actual failure data as the research basis. The most reliable and direct method for data acquisition is actual seismic observation or testing, and testing is the most effective in practical engineering applications. method. At present, most of the test methods used at home and abroad to study the mechanical characteristics and failure mechanism of buried pipelines crossing faults are model tests, which are carried out in laboratories. Model tests inevitably bring about problems such as size effects and boundary condition errors, and cannot well reflect the fault response characteristics of buried pipelines across faults. The in-situ test can better overcome the shortcomings of the model test, but it is difficult to implement and control the fault loading in the in-situ site, and there are certain difficulties in the underground observation and data collection of the fault response of the pipeline.
发明内容 Contents of the invention
本发明针对上述问题，提供了一种用于在原位场地模拟断层运动的跨断层埋地管线断层反应的量测系统，其目的在于：①准确、有效地控制和实施断层原位试验的分级加载条件；②解决由于覆盖土层影响，从而跨断层埋地管线原位试验断层反应难以观测的问题。 In view of the above problems, the present invention provides a measurement system for the fault response of buried pipelines across faults for simulating fault movement in situ. Loading conditions; ② Solve the problem that due to the influence of the covering soil layer, it is difficult to observe the fault response of the in-situ test of the buried pipeline across the fault.
本发明的目的是通过以下技术方案解决的： The purpose of the present invention is solved by the following technical solutions:
一种跨断层埋地管线原位试验量测系统，其特征在于所述的量测系统包括： An in-situ test measurement system for buried pipelines across faults, characterized in that the measurement system includes:
加载控制量测装置，用以控制加载位错量以及垂直运动装置和水平运动装置的水平加载状态，并于量测后对应输出量测数据至主机； The loading control measuring device is used to control the loading dislocation amount and the horizontal loading state of the vertical motion device and the horizontal motion device, and output the measurement data to the host after the measurement;
应变量测装置，用于测量试验管线的法向、切向应变反应，并于量测后对应输出量测数据至主机； The strain measurement device is used to measure the normal and tangential strain responses of the test pipeline, and output the measurement data to the host after the measurement;
位移量测装置，用于在地表上侧观测断层作用下埋地管线的竖向和水平方向的位移反应，并于量测后对应输出量测数据至主机； The displacement measurement device is used to observe the vertical and horizontal displacement responses of buried pipelines under the action of faults on the upper side of the ground surface, and output the measurement data to the host after the measurement;
内压量测装置，用于控制试验管线内的介质工作压力，并于量测后对应输出量测数据至主机； The internal pressure measurement device is used to control the working pressure of the medium in the test pipeline, and output the measurement data to the host after measurement;
主机，用于对加载控制量测装置、应变量测装置、位移量测装置和内压控制装置输送来的数据进行整理分析后得出验证结果。 The main engine is used to sort out and analyze the data sent by the load control measurement device, strain measurement device, displacement measurement device and internal pressure control device to obtain verification results.
所述的试验管线采用热熔法连接构成。 The test pipelines are connected by hot-melt method.
所述的加载控制量测装置包括垂直加载控制装置、水平加载控制装置和数据采集装置，垂直加载控制装置的垂直加载位错分量、压力状态和水平加载控制装置的水平加载位错分量、压力状态通过数据采集装置输出至主机。 The loading control measuring device includes a vertical loading control device, a horizontal loading control device and a data acquisition device, the vertical loading dislocation component and pressure state of the vertical loading control device and the horizontal loading dislocation component and pressure state of the horizontal loading control device Output to the host through the data acquisition device.
所述的垂直加载控制装置包括垂直加载位移计和垂直加载压力传感器，该垂直加载位移计布置在垂直运动装置的底端部外侧，垂直加载压力传感器布置在垂直运动装置的加载点位置；水平加载控制装置包括水平加载位移计和水平加载土压力盒，水平加载位移计布置在水平运动装置的外侧，水平加载土压力盒位于水平运动装置的内侧并位于试验管线的上侧和下侧；上述的垂直运动装置和水平运动装置位于反力装置的内部且水平运动装置放置于垂直运动装置的底板上侧。 The vertical loading control device includes a vertical loading displacement gauge and a vertical loading pressure sensor, the vertical loading displacement gauge is arranged outside the bottom end of the vertical moving device, and the vertical loading pressure sensor is arranged at the loading point of the vertical moving device; the horizontal loading The control device includes a horizontal loading displacement meter and a horizontal loading earth pressure cell. The horizontal loading displacement meter is arranged on the outside of the horizontal movement device, and the horizontal loading earth pressure cell is located on the inside of the horizontal movement device and on the upper and lower sides of the test pipeline; the above The vertical motion device and the horizontal motion device are located inside the reaction force device, and the horizontal motion device is placed on the upper side of the bottom plate of the vertical motion device.
所述的数据采集装置包括人工数据采集仪、数据自动采集分析系统和土压力专用数据采集仪，所述的人工数据采集仪通过数据线与垂直加载控制装置中的垂直加载位移计相连，数据自动采集分析系统分别通过数据线与垂直加载控制装置中的垂直加载压力传感器和水平加载控制装置中的水平加载位移计相连，土压力专用数据采集仪通过数据线与水平加载控制装置中的水平加载土压力盒相连。 Described data acquisition device comprises artificial data acquisition instrument, data automatic acquisition and analysis system and earth pressure special data acquisition instrument, and described artificial data acquisition instrument is connected with the vertical loading displacement gauge in vertical loading control device by data line, and data is automatically The acquisition and analysis system is respectively connected to the vertical loading pressure sensor in the vertical loading control device and the horizontal loading displacement meter in the horizontal loading control device through data lines, and the special data acquisition instrument for earth pressure is connected to the horizontal loading soil pressure sensor in the horizontal loading control device through data lines. The pressure box is connected.
所述的应变量测装置包括电阻应变片和数据自动采集静态采集仪，电阻应变片的实时数据通过数据自动采集静态采集仪采集后输送至主机。 The strain measuring device includes a resistance strain gauge and an automatic data acquisition static acquisition instrument, and the real-time data of the resistance strain gauge is collected by the data automatic acquisition static acquisition instrument and then sent to the host computer.
所述的位移量测装置包括位移指示机构和位移量测设备，该位移指示机构包括套箍、位移指示针、连接螺栓，竖直向上布置的位移指示针下端固定在套箍上，套箍通过连接螺栓固定在试验管线上；所述的位移量测设备包括经纬仪和水准仪，经纬仪和水准仪分别将位移指示针在竖向和水平方向的位移反应记录后输送至主机。 The displacement measuring device includes a displacement indicating mechanism and a displacement measuring device. The displacement indicating mechanism includes a ferrule, a displacement indicating needle, and a connecting bolt. The lower end of the vertically upwardly arranged displacement indicating needle is fixed on the ferrule, and the ferrule passes through the The connecting bolts are fixed on the test pipeline; the displacement measurement equipment includes a theodolite and a level, and the theodolite and the level respectively record the displacement responses of the displacement indicator needle in the vertical and horizontal directions and then send them to the main engine.
所述位移指示针的外侧设有保护套管。 The outer side of the displacement indicator needle is provided with a protective sleeve.
所述的内压量测装置包括管压观测仪，管压观测仪设置在试验管线的介质入口处。 The internal pressure measuring device includes a pipe pressure observer, and the pipe pressure observer is arranged at the medium inlet of the test pipeline.
本发明相比现有技术有如下优点： Compared with the prior art, the present invention has the following advantages:
本发明基于跨断层埋地管线原位试验，提出了一套新型的埋地管线原位试验断层反应量测系统和加载控制量测系统，该加载控制量测系统可以准确有效的实现试验设计所规定的每级加载位错量并且保证加载运动装置无倾斜地水平运动，该量测系统可以真实、准确地对原位试验管线的断层反应进行观测和控制；该量测系统考虑试验管线的工作状态状态以及试验管线接头等实际存在因素的影响，并对管线的工作状态进行控制更接近试验管线的实际受力状态，观测分析结果更为可靠有效，可广泛适用于埋地管线断层反应受力性能及破坏机理的试验量测。 Based on the in-situ test of buried pipelines across faults, the present invention proposes a new set of fault response measurement system and loading control measurement system for in-situ test of buried pipelines. The loading control measurement system can accurately and effectively realize the test design. The specified amount of loading dislocation at each level and the horizontal movement of the loading movement device without tilting, the measurement system can truly and accurately observe and control the fault response of the in-situ test pipeline; the measurement system considers the work of the test pipeline The state and the influence of actual factors such as test pipeline joints, and the control of the working state of the pipeline is closer to the actual stress state of the test pipeline. The observation and analysis results are more reliable and effective, and can be widely used in buried pipeline fault response stress Experimental measurement of properties and failure mechanisms.
附图说明 Description of drawings
附图1为本发明的量测系统原理示意图； Accompanying drawing 1 is the principle schematic diagram of measurement system of the present invention;
附图2为本发明所采用的试验装置结构示意图； Accompanying drawing 2 is the test device structure schematic diagram that the present invention adopts;
附图3为本发明的试验管线应变量测示意图； Accompanying drawing 3 is the test pipeline strain measurement schematic diagram of the present invention;
附图4为本发明的试验管线电阻应变片布置情况截面示意图； Accompanying drawing 4 is the schematic cross-sectional view of the arrangement of the test pipeline resistance strain gauges of the present invention;
附图5为本发明的试验管线位移量测系统布置示意图； Accompanying drawing 5 is a schematic layout diagram of the test pipeline displacement measuring system of the present invention;
附图6为本发明的试验管线位移指示机构结构示意图； Accompanying drawing 6 is the structural representation of the test pipeline displacement indicating mechanism of the present invention;
附图7为本发明的试验管线内压量测装置布置示意图； Accompanying drawing 7 is the layout schematic diagram of test pipeline internal pressure measuring device of the present invention;
附图8为本发明的加载控制量测装置布置示意图之一； Accompanying drawing 8 is one of layout schematic diagrams of loading control measuring device of the present invention;
附图9为本发明的加载控制量测装置布置示意图之二。 Accompanying drawing 9 is the second schematic diagram of the layout of the loading control measuring device of the present invention.
其中：1—加载控制量测装置；2—应变量测装置；3—位移量测装置；4—内压量测装置；5—主机；6—垂直加载控制装置；7—水平加载控制装置；8—数据采集装置；9—垂直加载位移计；10—垂直加载压力传感器；11—水平加载位移计；12—水平加载土压力盒；13—垂直运动装置；14—水平运动装置；15—反力装置；16—试验管线；17—人工数据采集仪；18—数据自动采集分析系统；19—土压力专用数据采集仪；20—电阻应变片；21—数据自动采集静态采集仪；22—位移指示机构；23—位移量测设备；24—套箍；25—位移指示针；26—连接螺栓；27—经纬仪；28—水准仪；29—保护套管；30—管压观测仪。 Among them: 1—loading control measuring device; 2—strain measuring device; 3—displacement measuring device; 4—internal pressure measuring device; 5—host; 6—vertical loading control device; 7—horizontal loading control device; 8—data acquisition device; 9—vertical loading displacement meter; 10—vertical loading pressure sensor; 11—horizontal loading displacement meter; 12—horizontal loading earth pressure box; 13—vertical movement device; 14—horizontal movement device; 15—reverse force device; 16—test pipeline; 17—manual data acquisition instrument; 18—automatic data acquisition and analysis system; 19—dedicated data acquisition instrument for earth pressure; 20—resistance strain gauge; 21—static data acquisition instrument for automatic data acquisition; 22—displacement Indicating mechanism; 23—displacement measuring equipment; 24—ferrule; 25—displacement indicator needle; 26—connecting bolt; 27—theodolite; 28—level; 29—protective casing; 30—pipe pressure observer.
具体实施方式 Detailed ways
下面结合附图与实施例对本发明作进一步的说明。 The present invention will be further described below in conjunction with the accompanying drawings and embodiments.
如图1-9所示：一种跨断层埋地管线原位试验量测系统，该量测系统包括：加载控制量测装置1，用以控制加载位错量以及垂直运动装置13和水平运动装置14的水平加载状态，并于量测后对应输出量测数据至主机5；应变量测装置2，用于测量试验管线16的法向、切向应变反应，并于量测后对应输出量测数据至主机5；位移量测装置3，用于在地表上侧观测断层作用下埋地管线的竖向和水平方向的位移反应，并于量测后对应输出量测数据至主机5；内压量测装置4，用于控制试验管线16内的介质工作压力，并于量测后对应输出量测数据至主机5；主机5，用于对加载控制量测装置1、应变量测装置2、位移量测装置3和内压控制装置4输送来的数据进行整理分析后得出验证结果。 As shown in Figure 1-9: an in-situ test measurement system for buried pipelines across faults, the measurement system includes: a loading control measurement device 1, which is used to control the amount of loading dislocation and the vertical movement device 13 and horizontal movement The horizontal loading state of the device 14, and correspondingly output the measurement data to the host computer 5 after the measurement; the strain measurement device 2 is used to measure the normal and tangential strain responses of the test pipeline 16, and correspond to the output after the measurement The measured data is sent to the host computer 5; the displacement measurement device 3 is used to observe the vertical and horizontal displacement responses of the buried pipeline under the action of the fault on the upper side of the ground, and after the measurement, the corresponding output measurement data is sent to the host computer 5; The pressure measurement device 4 is used to control the working pressure of the medium in the test pipeline 16, and correspondingly outputs the measurement data to the host 5 after the measurement; the host 5 is used to control the loading of the measurement device 1 and the strain measurement device 2 , the displacement measuring device 3 and the internal pressure control device 4 send the data after sorting and analyzing to obtain the verification result.
上述加载控制量测装置1包括垂直加载控制装置6、水平加载控制装置7和数据采集装置8，垂直加载控制装置6的垂直加载位错分量、压力状态和水平加载控制装置7的水平加载位错分量、压力状态通过数据采集装置8输出至主机5。其中垂直加载控制装置6包括垂直加载位移计9和垂直加载压力传感器10，该垂直加载位移计9布置在垂直运动装置13的底端部外侧用以控制原位试验断层每级加载位错的垂直分量，垂直加载压力传感器10布置在垂直运动装置13的加载点位置，每一加载点相应地布置一个垂直加载压力传感器10，试验中通过控制各个垂直加载压力传感器10的各加载步增量相同实现垂直运动装置13的无倾斜水平加载；水平加载控制装置7包括水平加载位移计11和水平加载土压力盒12，水平加载位移计11布置在水平运动装置14的外侧用以控制原位试验断层每级加载位错的水平分量，2个水平加载土压力盒12皆位于水平运动装置14的内侧并对称设置在试验管线16的上侧和下侧；上述水平运动装置14主要提供原位模拟试验中人工断层的水平运动分量，垂直运动装置13主要提供原位模拟试验中人工断层的竖向运动分量，垂直运动装置13和水平运动装置14位于反力装置15的内部且水平运动装置14放置于垂直运动装置13的底板上侧，反力装置15主要为断层加载的原位试验反力台座，在原位试验现场采用钢筋混凝土结构整体浇注成型。另外数据采集装置8包括人工数据采集仪17、数据自动采集分析系统18和土压力专用数据采集仪19，其中数据自动采集分析系统18采用四分之一桥路数据自动采集分析系统，上述的人工数据采集仪17通过数据线与垂直加载控制装置6中的垂直加载位移计9相连，数据自动采集分析系统18分别通过数据线与垂直加载控制装置6中的垂直加载压力传感器10和水平加载控制装置7中的水平加载位移计11相连，土压力专用数据采集仪19通过数据线与水平加载控制装置7中的水平加载土压力盒12相连。 The above-mentioned loading control measuring device 1 includes a vertical loading control device 6, a horizontal loading control device 7 and a data acquisition device 8, the vertical loading dislocation component of the vertical loading control device 6, the pressure state and the horizontal loading dislocation of the horizontal loading control device 7 The components and pressure status are output to the host computer 5 through the data acquisition device 8 . Wherein the vertical loading control device 6 includes a vertical loading displacement gauge 9 and a vertical loading pressure sensor 10, and the vertical loading displacement gauge 9 is arranged outside the bottom end of the vertical moving device 13 to control the vertical loading dislocation of each stage of the in-situ test fault. Component, the vertical loading pressure sensor 10 is arranged at the loading point position of the vertical moving device 13, and each loading point is correspondingly arranged with a vertical loading pressure sensor 10, which is realized by controlling the loading step increments of each vertical loading pressure sensor 10 to be the same in the test The non-inclined horizontal loading of the vertical moving device 13; the horizontal loading control device 7 includes a horizontal loading displacement meter 11 and a horizontal loading earth pressure cell 12, and the horizontal loading displacement meter 11 is arranged outside the horizontal moving device 14 to control the in-situ test fault. The horizontal component of the level-loaded dislocation, the two horizontally loaded earth pressure cells 12 are located inside the horizontal moving device 14 and symmetrically arranged on the upper side and the lower side of the test pipeline 16; the above-mentioned horizontal moving device 14 mainly provides The horizontal motion component of the artificial fault, the vertical motion device 13 mainly provides the vertical motion component of the artificial fault in the in-situ simulation test, the vertical motion device 13 and the horizontal motion device 14 are located inside the reaction device 15 and the horizontal motion device 14 is placed on the vertical On the upper side of the bottom plate of the moving device 13, the reaction device 15 is mainly an in-situ test reaction pedestal for fault loading, which is integrally cast with a reinforced concrete structure at the in-situ test site. In addition, the data acquisition device 8 comprises a manual data acquisition instrument 17, an automatic data acquisition and analysis system 18 and an earth pressure special data acquisition instrument 19, wherein the automatic data acquisition and analysis system 18 adopts a quarter bridge road data automatic acquisition and analysis system, and the above-mentioned artificial The data acquisition instrument 17 is connected to the vertical loading displacement meter 9 in the vertical loading control device 6 through the data line, and the automatic data collection and analysis system 18 is respectively connected to the vertical loading pressure sensor 10 and the horizontal loading control device in the vertical loading control device 6 through the data line The horizontal loading displacement meter 11 in 7 is connected, and the special data acquisition instrument 19 for earth pressure is connected with the horizontal loading earth pressure box 12 in the horizontal loading control device 7 through data lines.
上述应变量测装置2包括电阻应变片20和数据自动采集静态采集仪21，电阻应变片20的实时数据通过数据自动采集静态采集仪21采集后输送至主机5，安装时依据试验设计在采用热熔法连接构成的试验管线16的相应位置处粘贴电阻应变片20并进行检测，检测完好后将电阻应变片20分别与数据线进行连接并在电阻应变片20外围设置保护装置进行防潮、防撞处理。 The above-mentioned strain measurement device 2 includes a resistance strain gauge 20 and an automatic data acquisition static acquisition instrument 21. The real-time data of the resistance strain gauge 20 is collected by the data automatic acquisition static acquisition instrument 21 and then sent to the host computer 5. During installation, according to the experimental design, thermal Paste the resistance strain gauge 20 at the corresponding position of the test pipeline 16 formed by the fusion method and test it. After the detection is complete, connect the resistance strain gauge 20 to the data line and install a protection device around the resistance strain gauge 20 to prevent moisture and collision. deal with.
上述的位移量测装置3包括位移指示机构22和位移量测设备23，该位移指示机构22包括套箍24、位移指示针25、连接螺栓26，竖直向上布置的位移指示针25下端固定在套箍24上，套箍24通过连接螺栓26固定在试验管线16上，位移指示机构22的套箍24布置在电阻应变片20的附近并紧贴电阻应变片20的保护装置所在处，位移指示针25的外侧设置一定直径的PVC保护套管29用以避免加载过程中由于土体挤压引起的位移指示针25变形，保护套管29的半径应不小于断层的水平位错量，位移指示针25的端头突出原位试验场地地表，试验中利用位移量测设备23即经纬仪27和水准仪28观测突出地表的位移指示针25用以表述埋地管线的断层位移反应，即经纬仪27和水准仪28分别将位移指示针25在竖向和水平方向的位移反应记录后输送至主机5。 The above-mentioned displacement measuring device 3 includes a displacement indicating mechanism 22 and a displacement measuring device 23. The displacement indicating mechanism 22 includes a ferrule 24, a displacement indicating needle 25, and a connecting bolt 26. The lower end of the vertically upwardly arranged displacement indicating needle 25 is fixed on the On the ferrule 24, the ferrule 24 is fixed on the test pipeline 16 through the connecting bolt 26. The ferrule 24 of the displacement indicator mechanism 22 is arranged near the resistance strain gauge 20 and is close to the protective device of the resistance strain gauge 20. The displacement indicator A PVC protection sleeve 29 with a certain diameter is set outside the needle 25 to avoid deformation of the displacement indicator needle 25 caused by soil extrusion during the loading process. The radius of the protection sleeve 29 should not be less than the horizontal dislocation of the fault. The end of the needle 25 protrudes from the ground surface of the in-situ test site. During the test, the displacement measuring device 23, namely theodolite 27 and the level gauge 28 are used to observe the displacement indicating needle 25 protruding from the ground surface to express the fault displacement response of the buried pipeline, namely the theodolite 27 and the level gauge. 28 respectively send the displacement indicator needle 25 to the host computer 5 after recording the displacement responses in the vertical and horizontal directions.
上述内压量测装置4包括管压观测仪30，试验管线16的介质入口处位于试验管线16的远端并与原位试验现场的介质源相连通，试验管线16的介质出口处位于试验管线16的加载端并通过管路连接至试验场地外侧，试验管线16的介质入口处设置管压观测仪30用以控制原位试验埋地管线的工作压力，试验管线16的介质出入口处设置控制阀门。 The above-mentioned internal pressure measurement device 4 includes a pipe pressure observer 30. The medium inlet of the test pipeline 16 is located at the far end of the test pipeline 16 and communicates with the medium source at the in-situ test site. The medium outlet of the test pipeline 16 is located at the test pipeline. The loading end of 16 is connected to the outside of the test site through a pipeline. A pipe pressure observer 30 is installed at the medium inlet of the test pipeline 16 to control the working pressure of the buried pipeline for in-situ testing, and a control valve is set at the medium inlet and outlet of the test pipeline 16. .
实施例1 Example 1
本实施例选定的试验场地在南京，并采用模拟南京市城市供水管网来进行试验量测系统的验证。该试验的具体步骤如下： The test site selected in this embodiment is in Nanjing, and the simulation of the urban water supply network in Nanjing is used to verify the test measurement system. The specific steps of the test are as follows:
a、选定试验场地并浇筑反力装置15，然后将垂直运动装置13和水平运动装置14架设在反力装置15内，同时将垂直加载位移计9和水平加载位移计10放置在垂直运动装置13和水平运动装置14内试验设计设定的位置处； a. Select the test site and pour the counter force device 15, then erect the vertical motion device 13 and the horizontal motion device 14 in the counter force device 15, and place the vertical loading displacement meter 9 and the horizontal loading displacement meter 10 on the vertical motion device 13 and the position set by the test design in the horizontal motion device 14;
b、试验管线16选用南京市城市供水常用的HDPE管，通过电热熔连接的方法连接试验管线16，然后将电阻应变片20和位移指示机构22依据试验设计布置要求错位设置在试验管线16上，其中试验管线16的每一应变量测截面上布置四个测点，即每一应变量测截面上贴有四个电阻应变片20，电阻应变片20的外侧设有防护装置对其进行防潮、防撞包裹处理，考虑到断层作用下试验管线的实际受力情况，在断层引起的土体破裂带附近沿试验管线长度方向电阻应变片20布置截面的间距取为500mm，远离断层区域则沿试验管线长度方向电阻应变片20布置截面的间距增大至1000mm，同时考虑到热熔接头的初装应力效应，热熔接头左右两侧的电阻应变片20布置截面的间距取为500mm，另外管线位移指示针25竖直向上设置且在管线位移指示针25的外侧设有直径为100mm、长度为1000mm的PVC保护套管29以防止指针受到周围土体的挤压而产生变形，试验中管线位移指示针25位于PVC保护套管29的圆心位置； b. The test pipeline 16 is HDPE pipe commonly used in urban water supply in Nanjing City, and the test pipeline 16 is connected by the method of electrothermal fusion, and then the resistance strain gauge 20 and the displacement indicating mechanism 22 are dislocated on the test pipeline 16 according to the test design layout requirements, Four measuring points are arranged on each strain measuring section of the test pipeline 16, that is, four resistance strain gauges 20 are pasted on each strain measuring section, and the outer side of the resistance strain gauge 20 is provided with a protective device to prevent moisture, Anti-collision wrapping treatment, taking into account the actual stress of the test pipeline under the action of the fault, the distance between the sections where the resistance strain gauges 20 are arranged along the length direction of the test pipeline near the soil rupture zone caused by the fault is 500mm, and the distance away from the fault area is along the test pipeline. The distance between the layout sections of the strain gauges 20 in the length direction of the pipeline is increased to 1000 mm. At the same time, considering the initial installation stress effect of the hot-melt joint, the distance between the layout sections of the resistance strain gauges 20 on the left and right sides of the hot-melt joint is set to 500 mm. In addition, the displacement of the pipeline The indicator needle 25 is set vertically upward, and a PVC protective sleeve 29 with a diameter of 100 mm and a length of 1000 mm is provided outside the pipeline displacement indicator needle 25 to prevent the pointer from being deformed by the extrusion of the surrounding soil. The needle 25 is located at the center of the PVC protective sleeve 29;
c、分别通过数据线将电阻应变片20分别连接至一台60接口和两台20接口的数据自动采集静态应变仪21，垂直加载位移计9通过数据线连接至人工数据采集仪17，垂直加载压力传感器10和水平加载位移计11通过数据线连接至四分之一桥路的数据自动采集分析系统18，水平加载土压力盒12通过数据线连接至土压力专用数据采集仪19； c. Connect the resistance strain gauges 20 to one 60 interface and two 20 interface data automatic collection static strain gauges 21 respectively through the data lines, and the vertical loading displacement gauge 9 is connected to the manual data acquisition instrument 17 through the data lines, and the vertical loading The pressure sensor 10 and the horizontal loading displacement gauge 11 are connected to the data automatic acquisition and analysis system 18 of the quarter bridge road through the data line, and the horizontal loading earth pressure box 12 is connected to the special data acquisition instrument 19 for earth pressure through the data line;
d、根据南京市供水用HDPE管施工规范开挖管沟，管沟采用人工直臂开挖，沟底至地表距离取为1200mm，接着将试验管线16的两端部采用钢法兰进行密封后外接出水管和入水管，另外在试验管线16的入水口位置设置管压观测仪30用以随时观测试验中试验管线16内水压的变化，在试验管线16的出入水口处设置阀门用以控制管线内压的大小，沟底回填平整之后现场吊装就位试验管线16，其中试验管线16的一端设置与水平运动装置14上作为试验管线16的加载端部约束条件； d. Excavate pipe trenches according to the construction specifications of HDPE pipes for water supply in Nanjing. The pipe trenches are excavated with artificial straight arms. The distance from the bottom of the trench to the surface is 1200mm. Then, the two ends of the test pipeline 16 are sealed with steel flanges. The water outlet pipe and the water inlet pipe are externally connected, and a pipe pressure observer 30 is set at the water inlet of the test pipeline 16 to observe the change of the water pressure in the test pipeline 16 at any time during the test, and a valve is set at the water inlet and outlet of the test pipeline 16 to control The size of the internal pressure of the pipeline, after the ditch bottom is backfilled and leveled, the test pipeline 16 is hoisted in place on site, and one end of the test pipeline 16 is set on the horizontal movement device 14 as the loading end constraint condition of the test pipeline 16;
e、回填并分层夯实试验管线16上部的回填土，且回填过程中稳定保护套管29位置以使得位移指示针25尽量位于保护套管29的圆心位置，同时要求回填土的压实率不得小于80%，另外采用经纬仪27和水准仪28相结合的方法量测伸出地表的位移指示针25的平面坐标和竖向高程用以描述埋地管线的断层位移反应； e. Backfill and compact the backfill soil on the upper part of the test pipeline 16 in layers, and stabilize the position of the protection sleeve 29 during the backfill process so that the displacement indicator needle 25 is located at the center of the protection sleeve 29 as much as possible, and the compaction rate of the backfill soil must not less than 80%, in addition, the method of combining theodolite 27 and level 28 is used to measure the plane coordinates and vertical elevation of the displacement indicator needle 25 protruding from the ground to describe the fault displacement response of the buried pipeline;
f、对仪器和加载系统进行调试并打开入水管处阀门对试验管线16进行注水以检验仪器设备能否正常运行，并通过管线观测仪30实时观测管线内压，该原位试验HDPE供水水压大小为施工现场放入生活用水标准水压； f. Debug the instrument and loading system and open the valve at the water inlet pipe to inject water into the test pipeline 16 to check whether the equipment can operate normally, and observe the internal pressure of the pipeline in real time through the pipeline observer 30. This in-situ test HDPE water supply pressure The size is the standard water pressure of domestic water in the construction site;
g、检验正常后进行正式加载，试验过程采用位移控制的方式进行，共分8级进行加载，加载步骤如表1所示，且断层加载位错控制以竖向加载位移作为试验的主要控制条件，同时按照先施加断层水平位错再施加垂直位错的方式来完成各级加载，每级加载完成2分钟后采集试验数据，其中每级加载后试验管线16上的位置指示针25的水平位移和竖向位移采用经纬仪27和水准仪28测量后利用差值法计算得出，达到试验设计的断层极限位错量后即停止加载完成数据采集，最后对采集的数据进行整理分析后得出验证结果。验证结果显示，该试验方法成功地对服役状态下跨逆断层城市供水HDPE管线进行了试验研究，对跨断层埋地管线的受力性能及破坏机理进行了试验验证。 g. After the inspection is normal, the formal loading is carried out. The test process is carried out in the way of displacement control, and the loading is divided into 8 levels. The loading steps are shown in Table 1, and the fault loading dislocation control takes the vertical loading displacement as the main control condition of the test. , and at the same time complete all levels of loading by first applying fault horizontal dislocation and then applying vertical dislocation, each level of loading is completed 2 minutes after the test data is collected, wherein the position on the test pipeline 16 after each level of loading indicates the horizontal displacement of the needle 25 and vertical displacement are measured by theodolite 27 and level 28 and calculated by using the difference method. After reaching the fault limit dislocation amount designed for the test, the loading is stopped to complete data collection. Finally, the collected data is sorted out and analyzed to obtain verification results. . The verification results show that this test method has successfully carried out experimental research on urban water supply HDPE pipelines across reverse faults in service, and verified the mechanical performance and failure mechanism of buried pipelines across faults.
表1南京市供水管跨断层埋地管线试验的加载步骤。 Table 1 The loading steps of the Nanjing water supply pipe cross-fault buried pipeline test.
本发明选定试验场地并浇筑反力装置15，通过垂直运动装置13和水平运动装置14的设置作为断层发震基岩及土体远端边界条件，实现了人工断层的竖向位错分量和水平位错分类量，具有无预加断缝，无土体边界且断裂真实的特点；发明考虑试验管线16的接头、负载状态等实际存在因素的影响，更接近试验管线16的实际受力状态，分析结果更为可靠有效；该发明利用埋地管线应变量测装置2和位移量测装置3对原位试验管线的断层反应进行量测，实现了通过地上测量观测埋地管线断层反应的手段，并通过管线工作内压量测装置4观测原位试验中试验管线16的内压，考虑了试验管线16的实际工作状态更接近实际管线的受力状态；该发明利用原位试验加载控制量测装置1对试验加载过程进行量测和控制，实现了原位试验的加载过程检测和控制，该发明可广泛适用于埋地管线断层反应的原位试验量测和监测研究。 The present invention selects the test site and pours the counter force device 15, and through the setting of the vertical motion device 13 and the horizontal motion device 14 as the boundary conditions of the fault seismogenic bedrock and the far end of the soil, the vertical dislocation component and the value of the artificial fault are realized. The horizontal dislocation classification has the characteristics of no pre-added fracture, no soil boundary and real fracture; the invention considers the influence of actual factors such as the joint and load state of the test pipeline 16, and is closer to the actual stress state of the test pipeline 16 , the analysis results are more reliable and effective; the invention uses the buried pipeline strain measurement device 2 and the displacement measurement device 3 to measure the fault response of the in-situ test pipeline, and realizes the means of observing the buried pipeline fault response through ground measurement , and observe the internal pressure of the test pipeline 16 in the in-situ test through the pipeline working internal pressure measuring device 4, considering that the actual working state of the test pipeline 16 is closer to the stress state of the actual pipeline; this invention uses the in-situ test to load the control amount The measuring device 1 measures and controls the loading process of the test, and realizes the detection and control of the loading process of the in-situ test. The invention can be widely used in the in-situ test measurement and monitoring research of the fault reaction of buried pipelines.
以上实施例仅为说明本发明的技术思想，不能以此限定本发明的保护范围，凡是按照本发明提出的技术思想，在技术方案基础上所做的任何改动，均落入本发明保护范围之内；本发明未涉及的技术均可通过现有技术加以实现。 The above embodiments are only to illustrate the technical ideas of the present invention, and can not limit the protection scope of the present invention with this. All technical ideas proposed in accordance with the present invention, any changes made on the basis of technical solutions, all fall within the protection scope of the present invention. In; technologies not involved in the present invention can be realized by existing technologies.
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| CN104101537B (en) * | 2014-07-18 | 2017-05-03 | 山东康迪泰克工程橡胶有限公司 | Method and device for testing lateral stiffness of tubular belt |
| CN113138076A (en) * | 2021-05-31 | 2021-07-20 | 中山大学 | Buried pipeline full-scale in-situ test structure and test method thereof |
| CN115876434B (en) * | 2023-02-21 | 2023-05-02 | 清华四川能源互联网研究院 | Pressure load propagation experimental apparatus and method |
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