WO2023272541A1 - Underground space crack monitoring device and method - Google Patents
Underground space crack monitoring device and method Download PDFInfo
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- WO2023272541A1 WO2023272541A1 PCT/CN2021/103373 CN2021103373W WO2023272541A1 WO 2023272541 A1 WO2023272541 A1 WO 2023272541A1 CN 2021103373 W CN2021103373 W CN 2021103373W WO 2023272541 A1 WO2023272541 A1 WO 2023272541A1
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- 238000000034 method Methods 0.000 title claims abstract description 24
- 238000012806 monitoring device Methods 0.000 title claims abstract description 17
- 238000012360 testing method Methods 0.000 claims abstract description 18
- 239000000463 material Substances 0.000 claims description 14
- 229920000049 Carbon (fiber) Polymers 0.000 claims description 13
- 239000004917 carbon fiber Substances 0.000 claims description 13
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 claims description 13
- 239000004576 sand Substances 0.000 claims description 12
- 239000011398 Portland cement Substances 0.000 claims description 9
- 230000002159 abnormal effect Effects 0.000 claims description 6
- 238000012544 monitoring process Methods 0.000 claims description 6
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 6
- 239000002270 dispersing agent Substances 0.000 claims description 5
- 239000013530 defoamer Substances 0.000 claims description 3
- 229920000609 methyl cellulose Polymers 0.000 claims description 3
- 239000001923 methylcellulose Substances 0.000 claims description 3
- 235000010981 methylcellulose Nutrition 0.000 claims description 3
- 238000010276 construction Methods 0.000 abstract description 8
- 238000011161 development Methods 0.000 abstract description 5
- 230000003014 reinforcing effect Effects 0.000 abstract 1
- 238000001514 detection method Methods 0.000 description 11
- 230000005540 biological transmission Effects 0.000 description 4
- 239000004568 cement Substances 0.000 description 3
- 239000011540 sensing material Substances 0.000 description 3
- 229910000831 Steel Inorganic materials 0.000 description 2
- 230000007613 environmental effect Effects 0.000 description 2
- 238000009434 installation Methods 0.000 description 2
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- 239000004020 conductor Substances 0.000 description 1
- 238000007405 data analysis Methods 0.000 description 1
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- 238000002203 pretreatment Methods 0.000 description 1
- 238000003756 stirring Methods 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 230000001960 triggered effect Effects 0.000 description 1
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N27/00—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means
- G01N27/02—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means by investigating impedance
- G01N27/04—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means by investigating impedance by investigating resistance
- G01N27/041—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means by investigating impedance by investigating resistance of a solid body
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N27/00—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means
- G01N27/02—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means by investigating impedance
- G01N27/04—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means by investigating impedance by investigating resistance
- G01N27/20—Investigating the presence of flaws
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- the invention belongs to the technical field of large-scale concrete structure crack detection and evaluation, and in particular relates to an underground space crack monitoring device and method.
- the present invention provides an underground space crack monitoring device and method based on the theoretical system of conductive concrete materials, so as to solve the technical problem that underground space structural cracks cause engineering hazards.
- the present invention provides an underground space crack monitoring device, said device comprising:
- a conductive sensing strip the conductive sensing strip is fixedly laid in the reserved seam of the underground space to be measured; electrodes are provided at both ends of the conductive sensing strip, and the electrodes at both ends of the conductive sensing strip are connected to a DC power supply module; the conductive sensing strip is connected to a DC power supply module; A DC resistance test module is also connected in series on the connection circuit between the sensing strip and the DC power supply module; the DC resistance test module is communicatively connected with the control terminal.
- the conductive sensing strip includes:
- Portland cement, sand and 15mm PAN-based carbon fiber are uniformly stirred with dispersant and water to form a mixed material, and the mixed material is laid in the reserved seam and air-dried to obtain a conductive sensing strip.
- the width of the conductive sensing strip is 1 cm.
- multiple conductive sensing strips are laid in the reserved seam, and the multiple conductive sensing strips are equal in width and arranged at equal intervals; the multiple conductive sensing strips are connected to the DC power supply module through electrodes at both ends to form a loop, and each conductive sensing strip The circuits where they are located are all connected in series with DC resistance test modules.
- the DC power supply module includes a DC power supply and a DC stabilized power supply, and the DC stabilized power supply is electrically connected to the DC power supply.
- the present invention also provides a method for monitoring cracks in underground space, the method comprising:
- the method also includes:
- the conductive sensing strip whose resistance value exceeds the preset threshold is used as the abnormal sensing strip, and the arrangement position of the abnormal sensing strip is obtained according to the number of the abnormal sensing strip;
- the material configuration method of the conductive sensing strip includes:
- the method also includes:
- the beneficial effect of the present invention is that,
- the invention provides an underground space crack monitoring device and method. By laying conductive sensing strips in the reserved seams and building a conductive sensing strip circuit to detect the resistance value of the conductive sensing strips, once the resistance value of the conductive sensing strips suddenly increases to Exceeding the preset threshold indicates that the conductive sensing strip is damaged by new cracks, so that new cracks can be detected.
- the present invention can grasp the stress and strain state of the structure during the construction and operation of the underground space structure, analyze the occurrence and development process of structural cracks, and objectively and accurately judge whether the structural cracks of the underground space affect or damage the structural stability, and provide the basis for structural cracks. Hardened governance provides precise spatial location.
- the present invention has the following advantages:
- the intelligent sensing material involved in the present invention is low in cost, easy to manufacture on site, and convenient and feasible in construction and laying.
- the detection instrument involved in the present invention is low in cost, easy to install, reusable, accurate in detection accuracy, and meets engineering detection requirements.
- the present invention has the advantages of mature construction technology and flexible layout, which can be flexibly arranged according to actual working conditions.
- the design principle of the present invention is reliable, the structure is simple, and has very wide application prospects.
- Fig. 1 is a schematic structural view of an underground space crack monitoring device according to an embodiment of the present application
- Fig. 2 is a schematic structural diagram of the power supply and resistance detection circuit of the underground space crack monitoring device according to one embodiment of the present application;
- connection should be understood in a broad sense, for example, it can be a fixed connection or a detachable connection. Connected, or integrally connected; it can be mechanically connected or electrically connected; it can be directly connected or indirectly connected through an intermediary, and it can be the internal communication of two components. Those of ordinary skill in the art can understand the specific meanings of the above terms in the present invention based on specific situations.
- this embodiment provides an underground space crack monitoring device, including:
- Material preparation of conductive sensing strip ordinary portland cement (density 3.10g/cm3); natural river sand for sand; 15mm PAN-based carbon fiber for carbon fiber with a density of 1.76g/cm3 and a diameter of 7 ⁇ m; methyl cellulose And defoamer as a dispersant, fully disperse with carbon fiber in water, and then stir together with cement and sand; among them, the mixing amount of cement and sand is 1:1.
- ordinary portland cement density 3.10g/cm3
- natural river sand for sand 15mm PAN-based carbon fiber for carbon fiber with a density of 1.76g/cm3 and a diameter of 7 ⁇ m
- methyl cellulose And defoamer as a dispersant fully disperse with carbon fiber in water, and then stir together with cement and sand; among them, the mixing amount of cement and sand is 1:1.
- the DC stabilized voltage power supply 12 is connected on the branch of the DC power supply line 5, and the DC power supply line 5 is connected with the data acquisition and power supply module 3, and is controlled by the computer control terminal 4; it can be sent by the computer control terminal 4 Command whether to supply power to the DC stabilized power supply 12.
- the DC resistance test module 11 is connected on the branch of the detection data transmission line 6, and the detection data transmission line 6 is connected with the data acquisition and power supply module 3, and is controlled by the computer control terminal 4; commands can be sent by the computer control terminal 4 Whether to collect and analyze the resistance data of the DC resistance test module 11.
- the computer control terminal 4 issues a command to supply power to the DC power supply 12 .
- the DC resistance testing module 11 measures the resistance value of the conductive sensing strip 7 numbered 1, the conductive sensing strip 8 numbered 2, and the conductive sensing strip 9 numbered 3. If the conductive sensing strip 7 numbered 1, the conductive sensing strip 8 numbered 2, and the conductive sensing strip 9 numbered 3 are structurally intact and their resistance value is close to 0; if the conductive sensing strip 7 numbered 1 and the conductive sensing strip 9 numbered 2 The resistance value of one or more of the conductive sensing strip 8 and the conductive sensing strip 9 numbered 3 increases, indicating that the structure where the conductive sensing strip is located is cracked or there is a possibility of crack development. In order to further improve the monitoring accuracy, it is necessary to set the resistance threshold in advance. When the resistance value exceeds the resistance threshold, it is determined that the conductive sensing strip is damaged by a new crack, which can avoid false judgments triggered by small fluctuations in the resistance value caused by environmental influences.
- the resistance value measured by the DC resistance test module 11 is transmitted to the data acquisition and power supply module 3 through the detection data transmission line 6 , and the computer control terminal 4 is used for data analysis and storage.
- the computer control terminal 4 controls the data acquisition and power supply module 3 to realize the power supply and power-off of any DC stabilized voltage power supply 12 and the data collection of any DC resistance test module 11 .
- only one conductive sensing strip is laid in the reserved seam of the same section, and a conductive sensing strip circuit is constructed to monitor the resistance of the conductive sensing strip.
- the number of conductive sensing strips of the present invention is not fixed, and can be set according to needs.
- the air-dried conductive sensing strip can be prepared in advance, and the bottom of the conductive sensing strip and the reserved seam can be fixed together with cement as an adhesive, so that the conductive sensing strip can be quickly installed.
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Abstract
An underground space crack monitoring device and method. The device comprises: conductive sensing strips (7, 8, 9). The conductive sensing strips (7, 8, 9) are fixedly laid in a reserved seam (2) of an underground space to be detected; two ends of each of the conductive sensing strips (7, 8, 9) are provided with electrodes (10), and the electrodes (10) at the two ends of each of the conductive sensing strips (7, 8, 9) are connected to direct-current power supply modules (3, 12); a connection loop of each of the conductive sensing strips (7, 8, 9) and each of the direct-current power supply modules (3, 12) are connected in series with a direct-current resistance test module (11); and the direct-current resistance test modules (11) are communicationally connected to a control terminal (4). According to the underground space crack monitoring device and method, the stress-strain state of a structure can be mastered during construction and operation of an underground space structure, the occurrence and development process of a structure crack can be analyzed, and an accurate space position is provided for objectively and accurately determining whether the underground space structure crack affects or destroys the structure stability and reinforcing treatment of the structure crack.
Description
本发明属于大型混凝土结构裂缝检测与评估技术领域，具体涉及一种地下空间裂缝监测装置及方法。The invention belongs to the technical field of large-scale concrete structure crack detection and evaluation, and in particular relates to an underground space crack monitoring device and method.
随着城市轨道交通建设的发展，地铁车站、地下商场、地下厂房等城市地下空间结构建设规模不断扩大。然而，地下空间结构受力特征不同于地上空间结构，它不仅要承担来自上部结构的自重应力，而且也抵抗来自地下结构四周与底部的地应力和水压力作用，且作用力是持久永恒的。然而，在这些复杂的周边环境荷载作用下，地下空间结构在其薄弱区域易产生结构裂缝；同时如果已有结构缝处前期处理不当，也易造成结构缝开裂。传统的地下空间结构裂缝开裂发生、发展过程都是不易察觉和检测的，往往都是产生严重后果之后才会开展相关检测与治理，这就造成了很大的经济损失，有时还会严重影响人民生活质量。With the development of urban rail transit construction, the construction scale of urban underground space structures such as subway stations, underground shopping malls, and underground factories continues to expand. However, the mechanical characteristics of the underground space structure are different from the above-ground space structure. It not only bears the self-weight stress from the upper structure, but also resists the ground stress and water pressure from the surrounding and bottom of the underground structure, and the force is permanent and eternal. However, under these complex surrounding environmental loads, the underground space structure is prone to structural cracks in its weak areas; at the same time, if the pre-treatment of the existing structural joints is not done properly, it is easy to cause structural joints to crack. The occurrence and development process of cracks and cracks in traditional underground space structures are difficult to detect and detect, and relevant detection and treatment are often carried out only after serious consequences have occurred, which has caused great economic losses and sometimes seriously affected people. Quality of Life.
发明内容Contents of the invention
针对现有技术的上述不足，本发明基于导电混凝土材料的理论体系，提供一种地下空间裂缝监测装置及方法，以解决地下空间结构裂缝导致工程危害的技术问题。Aiming at the above-mentioned deficiencies in the prior art, the present invention provides an underground space crack monitoring device and method based on the theoretical system of conductive concrete materials, so as to solve the technical problem that underground space structural cracks cause engineering hazards.
本发明提供一种地下空间裂缝监测装置，所述装置包括：The present invention provides an underground space crack monitoring device, said device comprising:
导电感知条，所述导电感知条固定铺设在待测地下空间的预留缝内；所述导电感知条的两端设有电极，且导电感知条的两端电极连接直流供电模块；所述导电感知条与直流供电模块的连接回路上还串联有直流电阻测试模块；所述 直流电阻测试模块与控制终端通信连接。A conductive sensing strip, the conductive sensing strip is fixedly laid in the reserved seam of the underground space to be measured; electrodes are provided at both ends of the conductive sensing strip, and the electrodes at both ends of the conductive sensing strip are connected to a DC power supply module; the conductive sensing strip is connected to a DC power supply module; A DC resistance test module is also connected in series on the connection circuit between the sensing strip and the DC power supply module; the DC resistance test module is communicatively connected with the control terminal.
进一步的，所述导电感知条包括：Further, the conductive sensing strip includes:
硅酸盐水泥、砂子和15mmPAN基碳纤维。Portland cement, sand and 15mm PAN-based carbon fiber.
进一步的，硅酸盐水泥、砂子和15mmPAN基碳纤维与分散剂和水均匀搅拌成混合材料，所述混合材料铺设在预留缝内风干后得到导电感知条。Further, Portland cement, sand and 15mm PAN-based carbon fiber are uniformly stirred with dispersant and water to form a mixed material, and the mixed material is laid in the reserved seam and air-dried to obtain a conductive sensing strip.
进一步的，所述导电感知条的宽度为1cm。Further, the width of the conductive sensing strip is 1 cm.
进一步的，在预留缝内铺设多根导电感知条，多根导电感知条宽度相等且等间距排列；多根导电感知条均通过两端电极与直流供电模块连接成回路，且各导电感知条所在的回路均串联有直流电阻测试模块。Further, multiple conductive sensing strips are laid in the reserved seam, and the multiple conductive sensing strips are equal in width and arranged at equal intervals; the multiple conductive sensing strips are connected to the DC power supply module through electrodes at both ends to form a loop, and each conductive sensing strip The circuits where they are located are all connected in series with DC resistance test modules.
进一步的，所述直流供电模块包括直流电源和直流稳压供电器，所述直流稳压供电器与直流电源电连接。Further, the DC power supply module includes a DC power supply and a DC stabilized power supply, and the DC stabilized power supply is electrically connected to the DC power supply.
本发明还提供一种地下空间裂缝监测方法，所述方法包括：The present invention also provides a method for monitoring cracks in underground space, the method comprising:
实时接收直流电阻测试模块采集到的导电感知条的电阻值；Receive the resistance value of the conductive sensing strip collected by the DC resistance test module in real time;
若接收到的电阻值超过预设阈值，则判定地下空间存在新生裂缝。If the received resistance value exceeds the preset threshold, it is determined that new cracks exist in the underground space.
进一步的，所述方法还包括：Further, the method also includes:
根据导电感知条的位置排列关系对多根导电感知条进行编号；Number the multiple conductive sensing strips according to the position arrangement relationship of the conductive sensing strips;
分别获取多根导电感知条的电阻值；Obtain the resistance values of multiple conductive sensing strips respectively;
将电阻值超过预设阈值的导电感知条作为异常感知条，并根据异常感知条的编号获取异常感知条的排列位置；The conductive sensing strip whose resistance value exceeds the preset threshold is used as the abnormal sensing strip, and the arrangement position of the abnormal sensing strip is obtained according to the number of the abnormal sensing strip;
根据异常感知条的排列位置评估新生裂缝的尺寸信息。Evaluate the size information of newly born cracks according to the arrangement position of the anomaly sensing bars.
进一步的，导电感知条的材料配置方法包括：Further, the material configuration method of the conductive sensing strip includes:
密度为3.10g/cm
3的普通硅酸盐水泥、天然河砂、密度为1.76g/cm
3的15mmPAN基碳纤维，PAN基碳纤维直径为7μm；甲基纤维素和消泡剂作为分散剂与碳纤维在水中充分分散，再和普通硅酸盐水泥、天然河砂一同进行搅拌，搅拌均匀后得到混合材料。
Ordinary Portland cement with a density of 3.10g/ cm3 , natural river sand, 15mm PAN-based carbon fiber with a density of 1.76g/ cm3 , and a diameter of PAN-based carbon fiber with a diameter of 7μm; methyl cellulose and defoamer as a dispersant and carbon fiber Fully disperse in water, then mix with ordinary Portland cement and natural river sand, and mix well to obtain a mixed material.
进一步的，所述方法还包括：Further, the method also includes:
将混合材料填充于预留缝内，将混合材料铺设为指定长度和指定宽度的长条，在长条两端分别埋入电极。Fill the mixed material in the reserved seam, lay the mixed material into strips of specified length and width, and embed electrodes at both ends of the strips.
本发明的有益效果在于，The beneficial effect of the present invention is that,
本发明提供一种地下空间裂缝监测装置及方法，通过在预留缝内铺设导电感知条，并通过构建导电感知条回路检测导电感知条的电阻值，一旦导电感知条的电阻值突然增大至超过预设阈值则说明导电感知条被新生裂缝破坏，从而监测到新生裂缝的情况。本发明可以实现在地下空间结构施工与运营期间实施掌握结构应力应变状态，分析结构裂缝发生、发展过程，为客观准确地评判地下空间结构裂缝是否对于结构稳定性产生影响或破坏，并为结构裂缝加固治理提供精准的空间位置。The invention provides an underground space crack monitoring device and method. By laying conductive sensing strips in the reserved seams and building a conductive sensing strip circuit to detect the resistance value of the conductive sensing strips, once the resistance value of the conductive sensing strips suddenly increases to Exceeding the preset threshold indicates that the conductive sensing strip is damaged by new cracks, so that new cracks can be detected. The present invention can grasp the stress and strain state of the structure during the construction and operation of the underground space structure, analyze the occurrence and development process of structural cracks, and objectively and accurately judge whether the structural cracks of the underground space affect or damage the structural stability, and provide the basis for structural cracks. Hardened governance provides precise spatial location.
本发明与现有技术相比具有以下优点：Compared with the prior art, the present invention has the following advantages:
1.本发明所涉及的智能感知材料，成本低、易于现场制作，且施工铺设便捷可行。1. The intelligent sensing material involved in the present invention is low in cost, easy to manufacture on site, and convenient and feasible in construction and laying.
2.本发明所涉及的检测仪器，成本低、易于安装、可重复使用，检测精度准确，满足工程检测要求。2. The detection instrument involved in the present invention is low in cost, easy to install, reusable, accurate in detection accuracy, and meets engineering detection requirements.
3.本发明所涉及的施工工艺成熟，布置灵活的优点，可以根据实际工况灵活布置。3. The present invention has the advantages of mature construction technology and flexible layout, which can be flexibly arranged according to actual working conditions.
此外，本发明设计原理可靠，结构简单，具有非常广泛的应用前景。In addition, the design principle of the present invention is reliable, the structure is simple, and has very wide application prospects.
为了更清楚地说明本发明实施例或现有技术中的技术方案，下面将对实施例或现有技术描述中所需要使用的附图作简单地介绍，显而易见地，对于本领域普通技术人员而言，在不付出创造性劳动的前提下，还可以根据这些附图获得其他的附图。In order to more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the drawings that need to be used in the description of the embodiments or the prior art. Obviously, for those of ordinary skill in the art, In other words, other drawings can also be obtained from these drawings on the premise of not paying creative work.
图1是本申请一个实施例的地下空间裂缝监测装置的结构示意图；Fig. 1 is a schematic structural view of an underground space crack monitoring device according to an embodiment of the present application;
图2是本申请一个实施例的地下空间裂缝监测装置的供电和电阻检测线路的结构示意图；Fig. 2 is a schematic structural diagram of the power supply and resistance detection circuit of the underground space crack monitoring device according to one embodiment of the present application;
1.地下空间结构、2.施工缝或者变形缝、3.数据采集与电源供给模块、4.电脑控制终端、5.直流电源供给线路、6.检测数据传输线路、7.编号为1的导电感知条、8.编号为2的导电感知条、9.编号为3的导电感知条、10.电极钢丝、11.直流电阻测试模块、12.直流稳压供电器。1. Underground space structure, 2. Construction joints or deformation joints, 3. Data acquisition and power supply module, 4. Computer control terminal, 5. DC power supply line, 6. Detection data transmission line, 7. Conductor numbered 1 Sensing strip, 8. Conductive sensing strip numbered 2, 9. Conductive sensing strip numbered 3, 10. Electrode steel wire, 11. DC resistance test module, 12. DC stabilized voltage power supply.
为了使本技术领域的人员更好地理解本发明中的技术方案，下面将结合本发明实施例中的附图，对本发明实施例中的技术方案进行清楚、完整地描述，显然，所描述的实施例仅仅是本发明一部分实施例，而不是全部的实施例。基于本发明中的实施例，本领域普通技术人员在没有做出创造性劳动前提下所获得的所有其他实施例，都应当属于本发明保护的范围。In order to enable those skilled in the art to better understand the technical solutions in the present invention, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described The embodiments are only some of the embodiments of the present invention, not all of them. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts shall fall within the protection scope of the present invention.
需要说明的是，在不冲突的情况下，本发明中的实施例及实施例中的特征可以相互组合。It should be noted that, in the case of no conflict, the embodiments of the present invention and the features in the embodiments can be combined with each other.
在本发明的描述中，需要说明的是，除非另有明确的规定和限定，术语“安装”、“相连”、“连接”应做广义理解，例如，可以是固定连接，也可以是可拆卸连接，或一体地连接；可以是机械连接，也可以是电连接；可以是直接 相连，也可以通过中间媒介间接相连，可以是两个元件内部的连通。对于本领域的普通技术人员而言，可以通过具体情况理解上述术语在本发明中的具体含义。In the description of the present invention, it should be noted that unless otherwise specified and limited, the terms "installation", "connection" and "connection" should be understood in a broad sense, for example, it can be a fixed connection or a detachable connection. Connected, or integrally connected; it can be mechanically connected or electrically connected; it can be directly connected or indirectly connected through an intermediary, and it can be the internal communication of two components. Those of ordinary skill in the art can understand the specific meanings of the above terms in the present invention based on specific situations.
下面将参考附图并结合实施例来详细说明本发明。The present invention will be described in detail below with reference to the accompanying drawings and examples.
实施例1Example 1
请参考图1和图2，本实施例提供一种地下空间裂缝监测装置，包括：Please refer to Fig. 1 and Fig. 2, this embodiment provides an underground space crack monitoring device, including:
(1)导电感知条的材料配制：普通硅酸盐水泥(密度3.10g/cm3)；砂子使用天然河砂；碳纤维采用15mmPAN基碳纤维，其密度为1.76g/cm3，直径7μm；甲基纤维素和消泡剂作为分散剂，与碳纤维在水中充分分散，再和水泥、砂一同进行搅拌；其中，水泥、砂掺量为1:1。(1) Material preparation of conductive sensing strip: ordinary portland cement (density 3.10g/cm3); natural river sand for sand; 15mm PAN-based carbon fiber for carbon fiber with a density of 1.76g/cm3 and a diameter of 7 μm; methyl cellulose And defoamer as a dispersant, fully disperse with carbon fiber in water, and then stir together with cement and sand; among them, the mixing amount of cement and sand is 1:1.
(2)导电感知条制备：将搅拌均匀的智能感知材料按照长度为3m、2.9m、2.8m，由外侧向内侧(间距为0.1m)依次布设宽度为1cm的长条，且填充于地下空间结构预留的施工缝、变形缝之中，其编号分别为编号为1的导电感知条7、编号为2的导电感知条8、编号为3的导电感知条9；并在导电感知条7、编号为2的导电感知条8、编号为3的导电感知条9两端分别埋设电极钢丝10，且与直流电阻测试模块11、直流稳压供电器12串联。多根导电感知条均通过两端电极与直流供电模块连接成回路，且各导电感知条所在的回路均串联有直流电阻测试模块11。(2) Preparation of conductive sensing strips: arrange the uniformly stirred intelligent sensing materials with lengths of 3m, 2.9m, and 2.8m, and lay out strips with a width of 1cm from the outside to the inside (0.1m spacing), and fill them in the underground space Among the construction joints and deformation joints reserved for the structure, the numbers are the conductive sensing strip 7 numbered 1, the conductive sensing strip 8 numbered 2, and the conductive sensing strip 9 numbered 3; and in the conductive sensing strip 7, Electrode steel wires 10 are buried at both ends of the conductive sensing strip 8 numbered 2 and the conductive sensing strip 9 numbered 3, and are connected in series with the DC resistance test module 11 and the DC stabilized voltage power supply 12 . A plurality of conductive sensing strips are connected to the DC power supply module through electrodes at both ends to form a loop, and the loop where each conductive sensing strip is located is connected in series with a DC resistance testing module 11 .
(3)直流稳压供电器12连接在直流电源供给线路5的支路上，直流电源供给线路5与数据采集与电源供给模块3连接，且受到电脑控制终端4控制；可以通过电脑控制终端4发出命令是否为直流稳压供电器12供电。(3) The DC stabilized voltage power supply 12 is connected on the branch of the DC power supply line 5, and the DC power supply line 5 is connected with the data acquisition and power supply module 3, and is controlled by the computer control terminal 4; it can be sent by the computer control terminal 4 Command whether to supply power to the DC stabilized power supply 12.
(4)直流电阻测试模块11连接在检测数据传输线路6的支路上，检测数据传输线路6与数据采集与电源供给模块3连接，且受到电脑控制终端4控制； 可以通过电脑控制终端4发出命令是否采集与分析直流电阻测试模块11的电阻数据。(4) The DC resistance test module 11 is connected on the branch of the detection data transmission line 6, and the detection data transmission line 6 is connected with the data acquisition and power supply module 3, and is controlled by the computer control terminal 4; commands can be sent by the computer control terminal 4 Whether to collect and analyze the resistance data of the DC resistance test module 11.
(5)以此类推，每间隔1m布设3m长度的智能感知材料，开展相关结构裂缝检测工作。(5) By analogy, intelligent sensing materials with a length of 3m are laid at intervals of 1m to carry out relevant structural crack detection work.
本发明的实施方法：Implementation method of the present invention:
(1)电脑控制终端4发出命令为直流稳压供电器12供电。(1) The computer control terminal 4 issues a command to supply power to the DC power supply 12 .
(2)直流电阻测试模块11测定编号为1导电感知条7、编号为2的导电感知条8、编号为3的导电感知条9的电阻值。如果编号为1导电感知条7、编号为2的导电感知条8、编号为3的导电感知条9结构完整没有损坏，其电阻值接近0；如果编号为1导电感知条7、编号为2的导电感知条8、编号为3的导电感知条9中有一条或多条电阻值增大，说明导电感知条所在位置的结构开裂或者存在裂缝的发展可能性。为了进一步提高监测准确性，需预先设定电阻阈值，当电阻值超过电阻阈值则判定导电感知条被新生裂纹破坏，如此可避免由于受环境影响导致的电阻值微小波动触发错误判断。(2) The DC resistance testing module 11 measures the resistance value of the conductive sensing strip 7 numbered 1, the conductive sensing strip 8 numbered 2, and the conductive sensing strip 9 numbered 3. If the conductive sensing strip 7 numbered 1, the conductive sensing strip 8 numbered 2, and the conductive sensing strip 9 numbered 3 are structurally intact and their resistance value is close to 0; if the conductive sensing strip 7 numbered 1 and the conductive sensing strip 9 numbered 2 The resistance value of one or more of the conductive sensing strip 8 and the conductive sensing strip 9 numbered 3 increases, indicating that the structure where the conductive sensing strip is located is cracked or there is a possibility of crack development. In order to further improve the monitoring accuracy, it is necessary to set the resistance threshold in advance. When the resistance value exceeds the resistance threshold, it is determined that the conductive sensing strip is damaged by a new crack, which can avoid false judgments triggered by small fluctuations in the resistance value caused by environmental influences.
若仅有排列在中间的一根导电感知条的电阻值增大则说明新生裂纹规模不大，若三根导电感知条的电阻都存在增大的情况则说明新生裂纹规模较大。当导电感知条的数量越多，对新生裂纹的规模评估越准确。If the resistance value of only one conductive sensing strip arranged in the middle increases, it means that the scale of the new crack is small. If the resistance of the three conductive sensing strips increases, it means that the scale of the new crack is large. The larger the number of conductive sensing strips, the more accurate the assessment of the size of new cracks.
(3)直流电阻测试模块11测定的电阻值，通过检测数据传输线路6传输到数据采集与电源供给模块3，通过电脑控制终端4进行数据分析与存储。(3) The resistance value measured by the DC resistance test module 11 is transmitted to the data acquisition and power supply module 3 through the detection data transmission line 6 , and the computer control terminal 4 is used for data analysis and storage.
(4)电脑控制终端4控制数据采集与电源供给模块3可以实现对任何一处直流稳压供电器12供电和断电，可以实现对任何一处直流电阻测试模块11数据的采集。(4) The computer control terminal 4 controls the data acquisition and power supply module 3 to realize the power supply and power-off of any DC stabilized voltage power supply 12 and the data collection of any DC resistance test module 11 .
实施例2Example 2
本实施例提供的地下空间裂缝监测装置，在同段预留缝内仅铺设一根导电感知条，并构建导电感知条回路监测导电感知条的电阻。本发明的导电感知条的数量并不固定，可根据需要自行设定。In the underground space crack monitoring device provided in this embodiment, only one conductive sensing strip is laid in the reserved seam of the same section, and a conductive sensing strip circuit is constructed to monitor the resistance of the conductive sensing strip. The number of conductive sensing strips of the present invention is not fixed, and can be set according to needs.
为了提高装置安装速度，可以预先制备好风干后的导电感知条，并利用水泥作为粘合剂将导电感知条底部与预留缝固定在一起，这样可以快速安装后导电感知条。In order to improve the installation speed of the device, the air-dried conductive sensing strip can be prepared in advance, and the bottom of the conductive sensing strip and the reserved seam can be fixed together with cement as an adhesive, so that the conductive sensing strip can be quickly installed.
尽管通过参考附图并结合优选实施例的方式对本发明进行了详细描述，但本发明并不限于此。在不脱离本发明的精神和实质的前提下，本领域普通技术人员可以对本发明的实施例进行各种等效的修改或替换，而这些修改或替换都应在本发明的涵盖范围内/任何熟悉本技术领域的技术人员在本发明揭露的技术范围内，可轻易想到变化或替换，都应涵盖在本发明的保护范围之内。因此，本发明的保护范围应所述以权利要求的保护范围为准。Although the present invention has been described in detail in conjunction with preferred embodiments with reference to the accompanying drawings, the present invention is not limited thereto. Without departing from the spirit and essence of the present invention, those skilled in the art can make various equivalent modifications or replacements to the embodiments of the present invention, and these modifications or replacements should be within the scope of the present invention/any Those skilled in the art can easily think of changes or substitutions within the technical scope disclosed in the present invention, and all should be covered within the protection scope of the present invention. Therefore, the protection scope of the present invention should be based on the protection scope of the claims.
Claims (10)
- 一种地下空间裂缝监测装置，其特征在于，所述装置包括：An underground space crack monitoring device, characterized in that the device comprises:导电感知条，所述导电感知条固定铺设在待测地下空间的预留缝内；所述导电感知条的两端设有电极，且导电感知条的两端电极连接直流供电模块；所述导电感知条与直流供电模块的连接回路上还串联有直流电阻测试模块；所述直流电阻测试模块与控制终端通信连接。A conductive sensing strip, the conductive sensing strip is fixedly laid in the reserved seam of the underground space to be measured; electrodes are provided at both ends of the conductive sensing strip, and the electrodes at both ends of the conductive sensing strip are connected to a DC power supply module; the conductive sensing strip is connected to a DC power supply module; A DC resistance test module is also connected in series on the connection circuit between the sensing strip and the DC power supply module; the DC resistance test module is communicatively connected with the control terminal.
- 根据权利要求1所述的地下空间裂缝监测装置，其特征在于，所述导电感知条包括：The underground space crack monitoring device according to claim 1, wherein the conductive sensing strip comprises:硅酸盐水泥、砂子和15mmPAN基碳纤维。Portland cement, sand and 15mm PAN-based carbon fiber.
- 根据权利要求2所述的地下空间裂缝监测装置，其特征在于，硅酸盐水泥、砂子和15mmPAN基碳纤维与分散剂和水均匀搅拌成混合材料，所述混合材料铺设在预留缝内风干后得到导电感知条。The crack monitoring device for underground space according to claim 2, characterized in that Portland cement, sand and 15mm PAN-based carbon fiber, dispersant and water are evenly mixed into a mixed material, and the mixed material is laid in the reserved joint and air-dried Get the Conductivity Sense Strip.
- 根据权利要求3所述的地下空间裂缝监测装置，其特征在于，所述导电感知条的宽度为1cm。The underground space crack monitoring device according to claim 3, wherein the width of the conductive sensing strip is 1 cm.
- 根据权利要求1所述的地下空间裂缝监测装置，其特征在于，在预留缝内铺设多根导电感知条，多根导电感知条宽度相等且等间距排列；多根导电感知条均通过两端电极与直流供电模块连接成回路，且各导电感知条所在的回路均串联有直流电阻测试模块。The underground space crack monitoring device according to claim 1, wherein a plurality of conductive sensing strips are laid in the reserved seam, and the plurality of conductive sensing strips have equal width and are arranged at equal intervals; the plurality of conductive sensing strips pass through both ends The electrodes are connected to the DC power supply module to form a loop, and the loop where each conductive sensing strip is located is connected in series with a DC resistance testing module.
- 根据权利要求1所述的地下空间裂缝监测装置，其特征在于，所述直流供电模块包括直流电源和直流稳压供电器，所述直流稳压供电器与直流电源电连接。The crack monitoring device for underground space according to claim 1, wherein the DC power supply module includes a DC power supply and a DC stabilized voltage power supply, and the DC stabilized voltage power supply is electrically connected to the DC power supply.
- 一种地下空间裂缝监测方法，其特征在于，所述方法包括：A method for monitoring cracks in an underground space, characterized in that the method comprises:实时接收直流电阻测试模块采集到的导电感知条的电阻值；Receive the resistance value of the conductive sensing strip collected by the DC resistance test module in real time;若接收到的电阻值超过预设阈值，则判定地下空间存在新生裂缝。If the received resistance value exceeds the preset threshold, it is determined that new cracks exist in the underground space.
- 根据权利要求7所述的地下空间裂缝监测方法，其特征在于，所述方法还包括：The underground space crack monitoring method according to claim 7, wherein the method further comprises:根据导电感知条的位置排列关系对多根导电感知条进行编号；Number the multiple conductive sensing strips according to the position arrangement relationship of the conductive sensing strips;分别获取多根导电感知条的电阻值；Obtain the resistance values of multiple conductive sensing strips respectively;将电阻值超过预设阈值的导电感知条作为异常感知条，并根据异常感知条的编号获取异常感知条的排列位置；The conductive sensing strip whose resistance value exceeds the preset threshold is used as the abnormal sensing strip, and the arrangement position of the abnormal sensing strip is obtained according to the number of the abnormal sensing strip;根据异常感知条的排列位置评估新生裂缝的尺寸信息。Evaluate the size information of newly born cracks according to the arrangement position of the anomaly sensing bars.
- 根据权利要求7所述的地下空间裂缝监测方法，其特征在于，导电感知条的材料配置方法包括：The underground space crack monitoring method according to claim 7, wherein the material configuration method of the conductive sensing strip comprises:密度为3.10g/cm 3的普通硅酸盐水泥、天然河砂、密度为1.76g/cm 3的15mmPAN基碳纤维，PAN基碳纤维直径为7μm；甲基纤维素和消泡剂作为分散剂与碳纤维在水中充分分散，再和普通硅酸盐水泥、天然河砂一同进行搅拌，搅拌均匀后得到混合材料。 Ordinary Portland cement with a density of 3.10g/ cm3 , natural river sand, 15mm PAN-based carbon fiber with a density of 1.76g/ cm3 , and a diameter of PAN-based carbon fiber with a diameter of 7μm; methyl cellulose and defoamer as a dispersant and carbon fiber Fully disperse in water, then mix with ordinary Portland cement and natural river sand, and mix well to obtain a mixed material.
- 根据权利要求9所述的地下空间裂缝监测方法，其特征在于，所述方法还包括：The underground space crack monitoring method according to claim 9, characterized in that the method further comprises:将混合材料填充于预留缝内，将混合材料铺设为指定长度和指定宽度的长条，在长条两端分别埋入电极。Fill the mixed material in the reserved seam, lay the mixed material into strips of specified length and width, and embed electrodes at both ends of the strips.
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