CN1945278A - Long term monitoring sensor for steel bar corrosion in steel concrete member - Google Patents

Long term monitoring sensor for steel bar corrosion in steel concrete member Download PDF

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CN1945278A
CN1945278A CN 200610117060 CN200610117060A CN1945278A CN 1945278 A CN1945278 A CN 1945278A CN 200610117060 CN200610117060 CN 200610117060 CN 200610117060 A CN200610117060 A CN 200610117060A CN 1945278 A CN1945278 A CN 1945278A
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steel
rod
concrete
corrosion
base
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CN 200610117060
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Chinese (zh)
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CN100454000C (en )
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宋晓冰
刘西拉
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上海交通大学
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Abstract

The long term monitoring sensor for corrosion of steel bar in steel concrete member consists of electrode rods in the same length, pedestal, wires and sacrificed anode. The electrode rods are fixed in the sensor pedestal in stepped form, and the wires are connected through leaf springs to the anode and cathode of the electrode rods. During construction, the monitoring sensor is embedded into the concrete for subsequent regular data acquisition. In the case of finding out corroded steel bar in some electrode rod, the steel bar is protected via the cathode protector. The present invention can perform non-destroying detection of the steel bars in different depth and determine the frontal surface distance of the invading corrosive medium.

Description

钢筋混凝土构件中钢筋腐蚀长期监测传感器 RC member long steel corrosion monitoring sensor

技术领域 FIELD

本发明涉及一种钢筋混凝土构件中钢筋腐蚀长期监测传感器,可对含氯环境下钢筋混凝土构件中的钢筋腐蚀情况进行长期检测而不损伤混凝土表面,应用于结构工程领域中钢筋混凝土结构的耐久性检测和评估。 The present invention relates to a sensor for monitoring long-term reinforcement corrosion in reinforced concrete member, the concrete surface may be detected without long-term damage to the reinforced concrete members with a chlorine-containing environment steel corrosion, structural engineering field is applied to the durability of reinforced concrete structures testing and evaluation.

背景技术 Background technique

钢筋混凝土中的钢筋腐蚀是影响结构耐久性的主要影响因素之一。 Steel corrosion of reinforced concrete is one of the main factors affecting structural durability. 与混凝土保护层碳化引起的钢筋腐蚀相比,氯离子入侵引起的钢筋腐蚀速度更快(大约是碳化引起的钢筋腐蚀速度的10倍)、造成的损失更大,已引起工程界和学术界的广泛关注。 Compared with the steel corrosion caused by carbonation of concrete cover, reinforcement corrosion rate caused by the invasion of chloride ion is faster (about 10 times reinforcement corrosion rate of carbonization), greater losses, has caused engineering and academia extensive attention.

目前工程中对混凝土搅拌物或添加剂中的氯离子浓度控制普遍较严,因此,混凝土中的氯离子腐蚀大多是由于氯离子从外界入侵,并在钢筋表面积累,达到一定的浓度后造成的。 Currently engineering concrete mixing or chloride ion concentration of the additive in the control generally more stringent, and therefore, chloride ion etching concrete mostly due to chloride ions from outside intrusion, and accumulated in the steel surface, up to a certain concentration caused. 能引起钢筋开始腐蚀的氯离子最低浓度称为临界浓度。 The lowest concentration of chloride ions can cause corrosion of steel began to be called the critical concentration.

由于氯离子入侵造成的钢筋腐蚀速度快,而且腐蚀一旦发生,很难采取有效措施予以根除。 Since the invasion of chloride ions cause corrosion of steel fast, and corrosion in the event, it is difficult to take effective measures to eradicate. 因此,实际工程中应该采取的对策是:采用一套有效的监测手段,在钢筋腐蚀尚未开始之前,及早发现可能引起钢筋腐蚀的隐患,并采取相应的措施进行有针对性的防范。 Therefore, countermeasures should be taken of the actual project are: the use of an effective means of monitoring before reinforcement corrosion has not yet begun, early detection of risks may cause reinforcement corrosion and take appropriate measures for targeted prevention. 与发现钢筋腐蚀后再处理的方法相比,此对策将起到事半功倍的效果,与钢筋开始腐蚀后再运行防腐处理相比,经济消耗小,防腐效果更佳。 Compared with the method of reinforcement corrosion was found after treatment, this countermeasure will play a multiplier effect, as compared with steel start to corrode after running anti-corrosion treatment, small economies consumption, better anti-corrosion effect.

为达到以上目的,专利号为ZL 03 1 15903.6的中国发明专利提供了一种钢筋混凝土构件中钢筋腐蚀的传感器及检测方法,其特征包括:选取与工程所用钢筋材质相同的钢筋棒和与钢筋棒相同直径、相同长度的不锈钢棒,按照从长到短的顺序,将钢筋棒和不锈钢棒成阶梯状并排插在传感器基座的固定槽内,并由导线连出,制成传感器。 To achieve the above object, No. provides a sensor and method for detecting reinforcement corrosion in a reinforced concrete member as Chinese invention patent ZL 03 1 15903.6, further comprising: selecting and works the same steel material of steel bar and a steel bar with the same diameter, stainless steel rods of the same length, in order from short to long, and the stainless steel bar and rod stepped fixing groove strip in the sensor base, and even by a wire, made of the sensor. 浇注混凝土之前,将传感器的基座固定在混凝土构件中的钢筋上。 Before the concrete is poured on the base of the sensor is fixed in the reinforced concrete member. 在结构的使用期内,定期用电位电流仪测量并排布置的钢筋棒和不锈钢棒之间的宏电池腐蚀电流和电位差,对传感器进行定期监测。 During the lifetime of the structure, and the current macro cell corrosion potential difference between the stainless steel bar and rod periodic electric current measured position difference arranged side by side, regular monitoring of the sensor.

这项发明中的传感器具有以下缺点:1.阴阳极之间距离较大,使得在电流回路中混凝土电阻较大,对监测结果产生负面影响。 The sensor of the invention has the following disadvantages: a large distance between the anode and cathode, such that the large negative impact on the monitoring results in the current loop resistance of concrete.

2.阴阳极面积相同。 2. The same cathode and anode area. 由于一般的腐蚀都具有大阴极小阳极的特点,相同的阴阳极面积不符合实际情况。 Corrosion due to the general characteristics have small large cathode anode, cathode and anode areas are not identical with the actual situation.

3.传感器中的钢筋腐蚀后,由于腐蚀产物比腐蚀的钢材占据更大的体积,膨胀作用对混凝土保护层有破坏作用,增加测试部位混凝土的渗透性,对监测结果产生较大的影响。 3. After the steel corrosion sensor, since the corrosion products occupy a larger volume than the corrosion of steel, the expansion of the concrete cover acts damaging effects of increasing the permeability of concrete test site, a greater impact on the monitoring results.

4.无固定装置,在浇注混凝土时传感器定位比较困难。 4. No fixing means, when concrete is poured sensor positioning more difficult.

5.体积较大,不易在钢筋网中插空定位(特别是在钢筋布置较密时)。 The bulky, difficult to empty the inserted reinforcing mesh positioning (especially when reinforced dense arrangement).

6.钢筋和不锈钢棒的侧面需要密封处理,工序复杂且容易在施工时遭到损坏,影响监测结果。 6. The stainless steel rod and the side surface sealing process requires the process is complicated and easily damaged during construction, affect the monitoring results.

为避免以上缺点,需要对上述现有传感器作进一步的改进,以满足工程实际的需求。 To avoid the above disadvantages, the above-described conventional sensor need further improvements to meet the actual needs of the project.

发明内容 SUMMARY

本发明的目的在于针对现有技术的不足,提供一种钢筋混凝土构件中钢筋腐蚀长期监测传感器,能够直观而准确地判断钢筋的腐蚀状态,可以在不损伤混凝土表面的前提下,准确地检测出具体工作环境下危险锋面距离钢筋距离。 Object of the present invention is for the deficiencies of the prior art, to provide long-term monitoring sensor for reinforcement corrosion in reinforced concrete member, can be intuitively and accurately determining the state of corrosion of steel, may be made without damage to the concrete surface, accurately detected reinforced frontal dangerous distance from the specific work environment.

为实现这一目的,本发明提供的传感器在已有发明专利(专利号:ZL 03 115903.6)基础上进行了改进和创新。 To achieve this object, the present invention provides a sensor in the prior patent (patent number: ZL 03 115903.6) carried out on the basis of improvement and innovation. 传感器由若干长度相等的电极棒、基座、导线和牺牲阳极组成,电极棒成阶梯形固定在传感器基座的固定槽内,导线通过弹簧片分别与电极棒的阴阳极连接。 A plurality of sensors of equal length of the electrode rod, a base, a conductor and a sacrificial anode composition, a fixed electrode rod secured to the sensor stepped groove base, the wire electrode is connected to the rod by the spring cathanode sheet, respectively. 施工时将检测传感器埋入混凝土,在结构的使用期内,定期对传感器进行数据采集,当发现某电极棒内的钢筋发生腐蚀后,通过阴极保护装置对钢筋进行防腐保护。 The detection sensors embedded in the concrete construction, during the lifetime of the structure, the sensor data acquisition periodically, when found in a steel corrosion electrode rod, protected against corrosion by the cathodic protection of reinforcement means.

本发明的具体内容如下:传感器由若干根长度相等的钢筋棒(长度根据混凝土保护层厚度确定)、与钢筋棒相同数量和长度的不锈钢管(内径比钢筋棒外径大2mm)、阶梯状基座、牺牲阳极和导线组成。 In particular the present invention are as follows: the sensor by a number of steel bar roots of equal length (length is determined by the thickness of the protective layer of concrete), the same number and length of steel bar stainless steel tube (inner diameter than the outer diameter of 2mm steel bar), stepped-yl seat, and sacrificial anode wire components.

阶梯状基座的每个阶梯中央开有一个固定槽,每个固定槽中插入一根电极棒并由设置在固定槽内壁的单板弹簧片压紧。 Each stepped stepped central opening of the base has a fixing groove, each groove is inserted a fixed electrode rod secured by a groove provided on the inner wall of the spring piece pressed board.

电极棒由作为阳极的钢筋棒和作为阴极的不锈钢管构成,不锈钢管套在钢筋棒外侧,钢筋棒和不锈钢管之间灌注环氧树脂以保证绝缘,钢筋棒一端设有的突起接头插入固定槽底面中央圆柱形槽内,并由槽内设置的环行弹簧片实现连接和固定。 Electrode rod is inserted into the fixing groove by the rod as the anode and stainless steel as a cathode tubes, between the outer stainless steel tube over the steel bar, rod and stainless steel tube filled with epoxy resin to ensure insulation, steel bar provided at one end of the joint projection the bottom surface of the central cylindrical tank, by a spring plate ring groove disposed connectivity and fixed. 所述单板弹簧片和环行弹簧片分别由埋设在基座内的导线连接至基座侧面的缆线接口。 The circulator board and the spring leaf spring pieces are connected by a wire embedded within the base to the base side of the cable connector.

阶梯状基座的两端各设置一根定位棒,每根定位棒的两端各固定一个牺牲阳极,牺牲阳极通过埋设在定位棒内的导线连通到缆线接口,与缆线接口连接的外部导线连接到混凝土表面的室外插座上。 Each stepped ends of the base is provided a positioning rod, both ends of each positioning rod each fixed a sacrificial anode, the sacrificial anode to the communication interface via a cable buried in the positioning of the wire rod, connected to the external cable connector wires to the outside surface of the concrete socket. 阶梯状基座通过定位棒固定在混凝土构件中的结构主钢筋上。 Stepped concrete base is fixed by the positioning member main reinforcement bar structure on.

所述定位棒的底面与最低电极棒的顶面在相同平面上,钢筋棒的暴露表面与浇注的混凝土表面平行,并且最高钢筋棒的工作面距离混凝土表面不大于5mm。 The top surface of the positioning rod and the bottom surface of the lowest electrode rod on the same plane, parallel to the exposed surface of the steel bar to the concrete surface of the cast, and face up reinforcement bar from the concrete surface is not greater than 5mm.

所述牺牲阳极的材料为锌块,锌块外包裹pH值为7左右的改性砂浆以保证锌块的活性。 The sacrificial anode material is a metal zinc, zinc blocks overwrap modified mortar pH of about 7 to ensure that blocks the activity of zinc.

测量时将电位电流仪的两个电极通过室外插座分别连接到同一电极棒的钢筋棒和不锈钢管,测量钢筋棒和不锈钢管之间的宏电池腐蚀电流和电位差。 When measuring the current potential of the two electrodes respectively connected to the outdoor device to the same electrode rod receptacle of the rod and stainless steel tube, and measuring the current macro cell corrosion potential difference between the steel rod and stainless steel tube. 若电位差很小,与之对应的宏电流也很小,说明危险锋面未达到被测钢筋棒的被测端面深度。 If the potential difference is small, corresponding to a current macroblock is small, indicating that the test does not reach the danger frontal end surface measured depth of the reinforcing steel bar. 反之,则说明此钢筋表面已受到危险锋面的影响。 On the contrary, it indicates that the steel surface has been affected by this dangerous fronts.

当发现某深度的电极棒发生钢筋腐蚀后,在室外插座处将牺牲阳极和该电极棒上的钢筋棒通过跳线短路,形成对该腐蚀钢筋的阴极保护,可防止其继续腐蚀破坏混凝土保护层。 After the discovery of the occurrence of the depth of the electrode rod a steel corrosion in the outdoor outlet at the sacrificial anode and the reinforcing steel bar on the electrode rod by shorting the jumper, is formed in the cathodic protection of the steel corrosion, corrosion damage prevented from continuing concrete cover .

本发明的传感器可以多点分布,对建筑物进行有效监护。 Sensor of the present invention may be a multi-point distribution, effective monitoring of buildings.

与现有技术相比,本发明具有以下明显的优点:1.阴阳极之间的距离短,电流回路中的混凝土电阻小,对测试结果的影响小;2.阴阳极面积比较大,更加复合实际情况,测试电流更加敏感;3.阴极保护装置对已锈蚀钢筋产生保护作用,防止由于腐蚀产物膨胀造成的外层混凝土早期破坏。 Compared with the prior art, the present invention has the following significant advantages: shorter distance between the anode and cathode, concrete little resistance of the current loop, a small influence on the test result; 2 cathode and anode area is relatively large, more complex the actual situation, more sensitive test current; 3. cathodic protection protective effect on corroded steel, to prevent premature failure of the product due to corrosion caused by expansion of the outer layer of concrete.

4.定位装置使传感器与钢筋之间固定简便,且可以保证传感器电极与结构主钢筋之间的相对位置。 4. The positioning device is fixed between the sensor and the steel is simple, and can ensure the relative position between the sensor electrode and the structure of the main reinforcement.

5.由于采用了阴极套阳极的构造措施,使传感器体积有效减小,方便了现场定位。 5. As a result of the configuration of the cathode casing anode measures, effectively reducing the volume of the sensor, to facilitate positioning of the scene.

6.所有连线接头均在工程塑料内部,且有环氧树脂保护,保证了路线接头等容易损坏处的可靠性和耐久性。 6. All wires are inside the plastic fittings, and epoxy protection to ensure the reliability and durability of the route at the joints easily damaged.

7.电极与支座之间连接简单,电接触可靠,操作方便。 7. The connection between the electrode and the support is simple, reliable electrical contact, easy to operate.

本发明检测传感器结构简单,加工方便,采用的钢筋就地取材,或选取与工程所用钢筋材质相同的钢筋,测试环境与实际构件环境相同,钢筋棒与不锈钢棒之间的宏电池腐蚀测量简单且直观、准确,很容易判断钢筋的腐蚀状态,可以在不损伤混凝土表面的前提下,准确方便地确定腐蚀介质入侵锋面距离构件钢筋的距离。 Detecting sensor of the present invention is simple in structure, easy processing, using local materials of steel, or select the same works with steel reinforcement material, the same testing environment and the actual environment member, measured between the macrocell corrosion and stainless steel bar and rod simple intuitive, accurate, easily determine corrosion in reinforced and to be made without damage to the concrete surface, accurately and conveniently determine the corrosive medium distance frontal reinforcement member invasion.

附图说明 BRIEF DESCRIPTION

图1为本发明的传感器轴侧图。 FIG sensor shaft 1 side of the present invention FIG.

图1中,1为牺牲阳极,2为传感器的定位棒,3为结构主钢筋,4为钢筋棒(阳极),5为不锈钢管(阴极),6为阶梯状基座。 In FIG 1, a sacrificial anode rod positioning sensor 2, a main reinforcement structure 3, 4 is a steel bar (anode), a stainless steel pipe 5 (cathode), the base 6 is stepped.

图2为传感器剖面结构示意图。 FIG 2 is a cross-sectional structural diagram of a sensor.

图2中,2为定位棒;3为结构主钢筋,4为钢筋棒,5为不锈钢管,6为阶梯状基座,7为钢筋棒的突起接头,8为环形弹簧片,9为环氧树脂,10为导线,11为单板弹簧片,12为缆线接口,13为环氧树脂注射孔,15为室外插座,16为外部导线。 2, the positioning rod 2; 3 of the main reinforcement structure, for the steel bar 4, a stainless steel tube 5, 6 is a stepped base, the protrusion 7 of the joint steel bar, an annular spring plate 8, 9 is ethylene resin, 10 is a wire spring 11 for the veneer sheet 12 is a cable connector, the injection port 13 is an epoxy resin, an outdoor outlet 15, 16 for the external leads.

图3为电极棒结构示意图。 3 is a schematic view of the structure of the electrode rod.

图3中,4为钢筋棒,5为不锈钢管,7为突起接头,9为环氧树脂。 Figure 3, 4 is a steel bar, a stainless steel tube 5, 7 is the joint projection, 9 is an epoxy resin.

图4为测试原理示意图。 FIG 4 is a schematic view of the test principle.

图4中,3为结构主钢筋,6为阶梯状基座,14为混凝土,15为室外插座,16为外部导线,17为侵蚀介质入侵的危险锋面。 In FIG. 4, the main structural reinforcement 3, the base 6 is stepped, concrete 14, 15 is outside the socket, for the external leads 16, 17 for the frontal dangerous aggressive medium invasion.

具体实施方式 detailed description

以下结合附图对本发明的技术方案作进一步详细描述。 Conjunction with the drawings The technical solution of the present invention will be described in further detail.

本发明采用的传感器结构如图1、图2所示,包括阶梯状基座6、插于阶梯状基座6固定槽内的电极棒、以及与从电极棒引出的导线10相连的缆线接口12。 Sensor structure of the present invention is employed in FIG. 1, FIG. 2, includes a cable connector stepped base 6, is inserted in the fixing groove 6 of the base stepped electrode rod, and the lead wire from the electrode rod 10 connected 12.

电极棒由作为阳极的钢筋棒4和作为阴极的不锈钢管5构成。 Electrode rods is made of a steel bar 4 as an anode and a stainless steel tube 5 as a cathode. 选取与工程所用钢筋材质相同的钢筋,用车床加工成某一直径的钢筋棒4作为阳极,钢筋棒4的长度由结构钢筋的保护层厚度决定(如30mm的保护层厚度,则钢筋棒的长度为30-5+10=35mm)。 Length selection and works the same as the reinforcement material for the reinforcement, to a certain diameter of the steel bar lathing 4 as an anode, the length of the steel bar 4 is determined by the protective layer thickness of the structural steel (e.g., a protective layer thickness of 30mm, the steel rods is 30-5 + 10 = 35mm). 同时制作与钢筋棒4相同长度的不锈钢管5作为阴极,不锈钢管的内径为钢筋棒的直径加2mm。 While the same length of steel bar produced with 4 stainless steel tube 5 as a cathode, the inner diameter stainless steel tube to increase the diameter of the rod 2mm. 将不锈钢管5套在钢筋棒4外侧,在钢筋棒4和不锈钢管5之间灌注环氧树脂9,定位后保证钢筋棒4和不锈钢管5之间绝缘。 The stainless steel tube 4 in the outer sleeve 5 steel bar, steel bar between 4 and 5 stainless steel tubes filled with epoxy resin 9, positioned to ensure the insulation between the stainless steel rod 4 and tube 5. 在钢筋棒4的一端加工出7mm高的突起接头7(如图3所示),突起接头7插入固定槽底面中央圆柱形槽内,并由槽内设置的环行弹簧片8实现连接和固定。 4 at one end of the reinforcing steel bar machined 7mm high joint projections 7 (FIG. 3), the protrusion 7 is inserted into the joint surface of the central cylindrical fixing groove bottom, groove by a spring plate ring 8 provided connectivity and fixed.

阶梯状基座6由工程塑料制成,阶梯状基座6的每个阶梯中央开有一个直径比不锈钢管外径大4mm的固定槽,固定槽深15mm,固定槽内壁设置单板弹簧片11。 Stepped susceptor 6 is made of plastic, each step of the stepped base has a central opening diameter than the outer diameter of 4mm stainless steel tube fixing groove 6 of the fixing groove depth of 15mm, the board fixing groove inner wall 11 of the spring plate . 当电极棒插入固定槽后,单板弹簧片11与电极棒之间由于弹性而紧密接触。 When the electrode rod is inserted into the fixing groove, and the electrode rod 11 between the resilient board in close contact spring piece. 在固定槽的底面中央另开8mm直径,深9mm的圆柱形槽,槽内设环行弹簧片8,当电极棒插入固定槽后,突起接头7插入环行弹簧片8,并与之紧密接触,完成连接和固定。 In the center of the bottom opening and fixing the other groove diameter 8mm, 9mm deep cylindrical tank equipped with ring grooves spring piece 8, when the electrode rod is inserted into the fixing groove, the protrusion 7 is inserted into the joint ring spring piece 8, and in intimate contact therewith, complete connecting and fixing. 单板弹簧片11和环行弹簧片8分别由埋设在基座内的导线10连接至基座侧面的缆线接口12(AUI接口)。 Veneer sheet 11 and the spring ring are connected by a spring plate 8 embedded in the base 10 to the base side of the wire cable interfaces 12 (AUI interface). 当电极棒就位后,利用注射器将环氧树脂由注射孔13注射入电极棒和基座之间的孔隙,同时将空气排出,完成密封处理。 When the electrode rod in place, an epoxy resin from an injection syringe 13 is injected into the hole between the aperture and the base electrode rod, while the air is discharged, to complete the sealing process.

阶梯状基座6的两端各设置一根定位棒2,定位棒2由工程塑料制作。 Both ends of each of the stepped base 6 is provided with a positioning rod 2, the positioning rod 2 made of an engineering plastic. 定位棒2的底面与最低电极棒的顶面在相同平面上。 Positioning a top surface of the rod 2 and the bottom surface of the lowest electrode rod on the same plane. 在浇注混凝土之前,将阶梯状基座6通过定位棒2固定在混凝土构件中的结构主钢筋3上。 Before pouring the concrete, the stepped configuration of the main base 62 is fixed on the reinforced concrete member 3 by the positioning rod. 定位时,按照图1所示位置将定位棒2用铁丝捆绑在结构主钢筋3上,可以保证最低电极棒的顶面正好与结构主钢筋3的表面平齐。 Positioning according to the positioning position shown in FIG. 2 with wire rods tied to the main reinforcement structure 3, can ensure a top surface of the lowest electrode rod just flush with the surface of the main reinforcement structure 3. 当发现最低钢筋棒发生腐蚀时,说明结构主钢筋3也已发生腐蚀。 When they find the lowest corrosion steel bar, the configuration of the main reinforcement 3 also corrosion has occurred. 在固定的过程中,应保证电极棒与结构主钢筋之间不能短路;钢筋棒4的暴露表面与混凝土表面平行;并且保证最外侧(最高)钢筋棒工作面距离混凝土表面不大于5mm。 In the fixing process, not should ensure a short circuit between the electrode rod and the main reinforcement structure; exposed surface of the reinforcing steel bar 4 parallel to the concrete surface; and ensure that the most outer (top) face of not greater than 5mm steel bar from the concrete surface.

在每根定位棒2的两端各固定一个牺牲阳极1,两根定位棒2上的四个牺牲阳极1构成阴极保护装置。 At both ends of each positioning rod 2 is fixed to a sacrificial anode 1 each, four two sacrificial anode 2 positioned on a cathode rod 1 protection. 牺牲阳极1的材料为锌块,为保证锌块的活性,锌块外面包裹改性砂浆,改性砂浆的pH值应控制在7左右。 A sacrificial anode material is zinc block, block to ensure active zinc, zinc modified mortar wrapped outside of the block, pH, modified mortar should be controlled at around 7. 牺牲阳极1上焊接导线,导线埋设在定位棒2内,连通到缆线接口12。 A sacrificial anode on the solder wire, the wire is embedded in the positioning rod 2, the communication interface 12 to the cable.

缆线接口12为16线并口接口,可最多同时连接六个电极棒和四个牺牲阳极。 Cable connector 12 to the line 16 parallel interface can simultaneously connect a maximum of four and six sacrificial anode electrode rod. 当缆线接口12与外部导线16连接后,用环氧树脂将缆线接口12密封。 When the cable connector 12 is connected to the external leads 16, 12 sealed with an epoxy cable connector. 外部导线16的另一端连接到混凝土表面的室外插座15上。 The other end of the external lead 16 is connected to the outside surface of the concrete socket 15.

检测仪器为市场上购买的电位电流仪,测量时将电位电流仪的两个电极通过室外插座15分别连接到同一电极棒的钢筋棒4和不锈钢管5,测量内容为钢筋棒4和不锈钢管5之间的宏电池腐蚀电流和电位差。 Detection equipment on the market to purchase the current potential meter, when measuring the current potential of the two electrodes through an outdoor receptacle apparatus 15 are connected to the same electrode rod 4 and the stainless steel bar tube 5, the measurement contents for the steel bar 4 and 5 stainless steel tube macrocell corrosion current and a potential difference between the. 依据电偶腐蚀原理,当钢筋处于钝态时,钢筋棒4和不锈钢管5之间的电位差很小,与之对应的宏电流也很小。 Based on the principle of electrical corrosion even when the steel is in the passive state, a very small potential difference between the stainless steel rod 4 and tube 5, the current macroblock corresponding thereto is small. 如出现这种情况,说明危险锋面17未达到被测钢筋棒的被测端面深度(图4)。 As this occurs, the danger described frontal end surface 17 does not reach the measured depth measured steel rod (FIG. 4). 反之,如果过一段时间再次测量时发现宏电池腐蚀电流和电位差发生了突然增加,则说明此钢筋表面已受到危险锋面17的影响,危险锋面17已经发展到此测试钢筋表面深度。 Conversely, if found to macrocell corrosion current and a potential difference occurs when a sudden increase over time measurement again, the steel surface is affected by this risk front surface 17, front surface 17 has developed the risk this test steel surface depth.

当发现某深度的电极棒发生钢筋腐蚀后,在室外插座15处将牺牲阳极1和该电极棒上的钢筋棒4通过跳线短路,形成对该腐蚀钢筋的阴极保护,防止其继续腐蚀破坏混凝土保护层。 After the discovery of the occurrence of the depth of the electrode rod a steel corrosion in the outdoor outlet 15 at the sacrificial anode 4 through shorting jumper on the steel bar and the electrode rod 1, formation of the cathodic corrosion protection of steel, concrete to prevent corrosion damage to continue The protective layer.

对传感器进行定期监测,可以发现随着时间的推移,受到危险锋面17影响的钢筋表面数量逐渐增多,深度逐渐加深。 Regular monitoring of the sensor, the number of bars can be found in the surface over time, the risk of frontal impact by 17 gradually increased, the depth gradually deepened.

可以用结构主钢筋3的保护层厚度减去危险锋面发展深度,得到危险锋面距离结构主钢筋3表面的距离,并判断危险锋面逼近构件钢筋的速度,近而制定合理的维修对策,在结构主钢筋3未开始腐蚀之前,及时采取阴极保护、电化学除氯等方法防止结构主钢筋开始腐蚀。 It may be subtracted with a protective layer thickness of the structure of the main reinforcement 3 dangerous frontal development depth, from the surface 3 of the risk of the front surface from the structure of the main reinforcement to obtain and determine the danger frontal approximation REINFORCED speed, nearly formulated reasonable maintenance measures in the structure of the main 3 is not started before the steel corrosion, timely cathodic protection, electrochemical chloride or the like to prevent the main steel structure begin to corrode.

本发明的传感器可以分别布置在构件的不同部位(如桥梁柱的深水区、溅浪区、干燥区),并可在每个区域同时布置多个点,对建筑物进行有效监护。 Different parts of the sensor of the present invention may be arranged separately in the member (e.g., deepwater bridge column, waves splash zone, a drying zone), and can also be arranged at a plurality of points in each region, effective monitoring of buildings.

Claims (3)

  1. 1.一种钢筋混凝土构件中钢筋腐蚀长期监测传感器,包括阶梯状基座(6)、插于阶梯状基座(6)固定槽内的电极棒、以及与从电极棒引出的导线(10)相连的缆线接口(12),其特征在于:阶梯状基座(6)的每个阶梯中央开有一个固定槽,每个固定槽中插入一根电极棒并由设置在固定槽内壁的单板弹簧片(11)压紧;电极棒由作为阳极的钢筋棒(4)和作为阴极的不锈钢管(5)构成,不锈钢管(5)套在钢筋棒(4)外侧,钢筋棒(4)和不锈钢管(5)之间灌注环氧树脂(9)以保证绝缘,钢筋棒(4)一端设有的突起接头(7)插入固定槽底面中央圆柱形槽内,并由槽内设置的环行弹簧片(8)实现连接和固定;所述单板弹簧片(11)和环行弹簧片(8)分别由埋设在基座内的导线(10)连接至基座侧面的缆线接口(12);阶梯状基座(6)的两端各设置一根定位棒(2),每根定位棒(2)的两端各固定一个牺牲阳极(1),牺牲阳 A steel corrosion in reinforced concrete member term monitoring sensor comprising a stepped base (6), is inserted in the fixing groove stepped base (6) of the electrode rod, and the lead wire from the electrode rod (10) cable connector (12) is connected, wherein: each central stepped stepped base (6) has a fixing groove opened, is inserted into a slot of each electrode rod is fixed by a single fixing groove provided on the inner wall leaf spring sheet (11) pressing; an electrode rod made of a steel rod anode (4) as a cathode and a stainless steel tube (5), and stainless steel tube (5) sets the steel bar (4) outside steel bar (4) filled with epoxy resin (9) and between the stainless steel tube (5) in order to ensure insulation, steel bar (4) provided at one end of the joint projection (7) inserted into the fixing groove bottom surface of the central cylindrical tank, provided by the circular groove the leaf spring (8) is connected and fixed achieved; the veneer sheet spring (11) and a spring plate ring (8) are connected by a wire (10) embedded in the base to the base side of the cable connector (12) ; stepped ends of the base (6) each provided with a positioning rod (2), each fixed at both ends of each positioning rod (2) is a sacrificial anode (1), the sacrificial anode (1)通过埋设在定位棒(2)内的导线连通到缆线接口(12),与缆线接口(12)连接的外部导线(16)连接到混凝土表面的室外插座(15)上;阶梯状基座(6)通过定位棒(2)固定在混凝土构件中的结构主钢筋(3)上。 (1) communicates to the cable interface via wires embedded in the inside (2) positioning rod (12), and the cable interface (12) of external leads (16) connected to the outdoor connection socket (15) on the concrete surface; step the shaped base (6) by the positioning bar (2) fixed to the concrete structure of the main reinforcement member (3).
  2. 2.根据权利要求1的钢筋混凝土构件中钢筋腐蚀长期监测传感器,其特征在于所述定位棒(2)的底面与最低电极棒的顶面在相同平面上,钢筋棒(4)的暴露表面与浇注的混凝土(14)表面平行,并且最高钢筋棒的工作面距离混凝土表面不大于5mm。 The long-term reinforcement corrosion monitoring sensor of the reinforced concrete member as claimed in claim 1, characterized in that the positioning rod (2) of the top surface of the bottom surface of the lowest electrode rod on the same plane, steel bar (4) and the exposed surface concrete (14) parallel to the casting surface, and the top face of the steel rod from the concrete surface is not greater than 5mm.
  3. 3.根据权利要求1的钢筋混凝土构件中钢筋腐蚀长期监测传感器,其特征在于所述牺牲阳极(1)的材料为锌块,锌块外包裹pH值为7的改性砂浆以保证锌块的活性。 The long-term reinforcement corrosion monitoring sensor of the reinforced concrete member as claimed in claim 1, wherein said sacrificial anode material (1) is a zinc ingot, zinc blocks overwrap modified mortar pH of 7 to ensure zinc block active.
CN 200610117060 2006-10-12 2006-10-12 Long term monitoring sensor for steel bar corrosion in steel concrete member CN100454000C (en)

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CN101706408B (en) 2009-11-27 2011-12-28 厦门大学 A reinforcement embedded concrete corrosion sensor
CN102507661A (en) * 2011-11-23 2012-06-20 山东高速青岛公路有限公司 Method for monitoring concrete freezing and thawing destroy in real time on line
CN102692372A (en) * 2011-03-22 2012-09-26 精工爱普生株式会社 Sensor means
CN103234897A (en) * 2013-05-03 2013-08-07 浙江大学 Device used for monitoring erosion process of corrosive medium in concrete
CN104713820A (en) * 2015-03-25 2015-06-17 天津大学 Method for detecting corrosion state of metal in concrete
CN105132923A (en) * 2015-06-03 2015-12-09 清华大学 Corrosion active control system and method for toggle pins or reinforcing steel bars in concrete
US9297741B2 (en) 2011-03-22 2016-03-29 Seiko Epson Corporation Corrosion detection sensor device

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GB8824421D0 (en) 1988-10-19 1988-11-23 Secretary Environment Brit Environment monitor
GB9106218D0 (en) 1991-03-23 1991-05-08 Capcis March Ltd Electrochemical impedance monitoring
US6690182B2 (en) 2000-07-19 2004-02-10 Virginia Technologies, Inc Embeddable corrosion monitoring-instrument for steel reinforced structures
CN1177213C (en) 2003-03-20 2004-11-24 上海交通大学 Method for detecting corrosion of concrete bar in reinforced concrete

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Publication number Priority date Publication date Assignee Title
CN101706408B (en) 2009-11-27 2011-12-28 厦门大学 A reinforcement embedded concrete corrosion sensor
CN102692372A (en) * 2011-03-22 2012-09-26 精工爱普生株式会社 Sensor means
US9442060B2 (en) 2011-03-22 2016-09-13 Seiko Epson Corporation Corrosion detection sensor device
US9297741B2 (en) 2011-03-22 2016-03-29 Seiko Epson Corporation Corrosion detection sensor device
CN102507661A (en) * 2011-11-23 2012-06-20 山东高速青岛公路有限公司 Method for monitoring concrete freezing and thawing destroy in real time on line
CN102507661B (en) 2011-11-23 2013-08-07 清华大学 Method for monitoring concrete freezing and thawing destroy in real time on line
CN103234897A (en) * 2013-05-03 2013-08-07 浙江大学 Device used for monitoring erosion process of corrosive medium in concrete
CN103234897B (en) * 2013-05-03 2015-11-25 浙江大学 A device for medium erosion processes for monitoring corrosion in concrete
CN104713820A (en) * 2015-03-25 2015-06-17 天津大学 Method for detecting corrosion state of metal in concrete
CN105132923A (en) * 2015-06-03 2015-12-09 清华大学 Corrosion active control system and method for toggle pins or reinforcing steel bars in concrete
CN105132923B (en) * 2015-06-03 2018-02-16 清华大学 Concrete or reinforced pegs active corrosion control system and method

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