CN106645432B - A kind of automatic coupling sonic test system and sonic test method - Google Patents
A kind of automatic coupling sonic test system and sonic test method Download PDFInfo
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Abstract
本发明提供了一种自动耦合声波测试系统及声波测试方法，自动耦合声波测试系统主要包括声波测试设备和注水加压设备两部分，其中声波测试设备包括声波探头(1)，声波探头(1)一端设有进水接头(3)，进水接头(3)上设有进水孔(7)、声波信号电缆通道孔(8)和推送杆连接螺栓(14)，声波探头(1)另一端设置有固定短杆(4)，其特征在于：声波测试设备还包括柔性弱透水袋(2)，套装在声波探头(1)外，该柔性弱透水袋(2)包括密封段和工作段。由于采用了柔性弱透水袋，柔性保证了一种类型可适用于大小不同孔径。弱透水性，可以不必端部设排气孔，并且保证工作段袋与孔壁之间充满水，可有效的保证测试段内探头与孔壁耦合问题。
The invention provides an automatic coupling acoustic wave testing system and an acoustic wave testing method. The automatic coupling acoustic wave testing system mainly includes two parts: acoustic wave testing equipment and water injection pressurization equipment, wherein the acoustic wave testing equipment includes an acoustic wave probe (1), an acoustic wave probe (1) One end is provided with a water inlet connector (3), and the water inlet connector (3) is provided with a water inlet hole (7), an acoustic signal cable channel hole (8) and a push rod connecting bolt (14), and the other end of the acoustic wave probe (1) A fixed short rod (4) is provided, and the feature is that the acoustic wave testing equipment also includes a flexible impervious bag (2), which is set outside the acoustic wave probe (1), and the flexible impermeable bag (2) includes a sealing section and a working section. Due to the adoption of flexible impermeable water bags, the flexibility ensures that one type can be applied to different sizes of apertures. Weak water permeability, it is not necessary to set vent holes at the end, and ensure that the working section bag and the hole wall are filled with water, which can effectively ensure the coupling between the probe and the hole wall in the test section.
Description
技术领域technical field
本发明属于一种可方便在钻孔中进行声波测试的系统及声波测试方法，孔径只要满足能放进测试探头，可适用于测试时无法保证钻孔充满水的所有钻孔。The invention belongs to a system and a sound wave testing method which can conveniently carry out sound wave testing in boreholes. As long as the hole diameter is sufficient enough to fit a test probe, it can be applied to all boreholes that cannot be guaranteed to be filled with water during testing.
背景技术Background technique
声波测试是弹性波测试方法之一，其理论基础建立在固体介质中弹性波的传播理论上，该方法是以电磁激振的方法向介质(岩石、岩体、混凝土构筑物)发射声波，在一定的空间距离上接收介质物理特性的声波，通过观测和分析声波在不同介质中的传播速度、振幅、频率等声学参数，检测介质(岩石、岩体、混凝土构筑物)的有关特性。声波检测技术具有用途广泛、成果实用性强、完全不破坏工程建筑物等优点，迅速在国内外普及推广，成为应用最广泛的无损检测方法，是我国基础建设工程中作为质量检查的最主要手段之一。因此，我国不论在监测技术、仪器设备方面均取得重大进步，使该技术在国内许多建设工程广泛推广应用，在提高工程质量、消除隐患、保证安全方面发挥了巨大作用。Acoustic wave testing is one of the elastic wave testing methods. Its theoretical basis is based on the propagation theory of elastic waves in solid media. Receive the sound wave of the physical characteristics of the medium at a certain spatial distance, and detect the relevant characteristics of the medium (rock, rock mass, concrete structure) by observing and analyzing the acoustic parameters such as the propagation velocity, amplitude, and frequency of the sound wave in different media. Acoustic testing technology has the advantages of wide application, strong practicability, and no damage to engineering buildings. It is rapidly popularized at home and abroad, and has become the most widely used non-destructive testing method. It is the most important means of quality inspection in my country's infrastructure projects. one. Therefore, my country has made significant progress in both monitoring technology and instrumentation, making this technology widely used in many domestic construction projects, and playing a huge role in improving project quality, eliminating hidden dangers, and ensuring safety.
声波测试在具体的工程应用中，常是在介质中的钻孔内进行检测，声波探头放进孔内后，要求发射探头和接收探头的外表面全部介质孔壁良好接触，才能获得既稳定有准确的测试结果，如果不借助于耦合介质，是非常困难的。为了能够保证良好接触，必须在探头和孔壁之间充满耦合介质，通过几十年来的工程实践验证，水是最为理想的耦合介质。目前声波测试中，采取在孔中充满水，以水作为耦合介质，是最常采用的方法，但是在复杂围岩条件和测试环境下，如大断面地下洞室和隧道中，经常遇到以下几种情况：(1)孔内无水，即干孔，(2)即使有地下水，但没有充满测试孔，(3)平孔和仰孔，(4)总个钻孔段内存在强弱透水带孔段。遇到以上几种情况，就必须不断向孔内注水，孔口进行堵水，保证水充满整个钻孔，在一个钻孔内需要进行几十个孔段的测试时，就需要几十次的注水、堵水循环操作，极为费时、费力，遇到仰孔或强透水带孔段钻孔时，操作就更加困难，以上情况，大大限制了声波测试技术在现场的推广应用。In specific engineering applications, acoustic wave testing is often carried out in boreholes in the medium. After the acoustic wave probe is placed in the hole, it is required that the outer surfaces of the transmitting probe and the receiving probe are in good contact with the entire medium hole wall, in order to obtain stable and effective Accurate test results are very difficult without the aid of coupling media. In order to ensure good contact, the coupling medium must be filled between the probe and the hole wall. Through decades of engineering practice, water is the most ideal coupling medium. At present, in the acoustic wave test, filling the hole with water and using water as the coupling medium is the most commonly used method, but in complex surrounding rock conditions and test environments, such as large-section underground caverns and tunnels, the following are often encountered Several situations: (1) There is no water in the hole, that is, dry hole, (2) Even if there is groundwater, the test hole is not filled, (3) Flat hole and upward hole, (4) There are strong and weak water permeable zones in the total drilling section hole segment. When encountering the above situations, it is necessary to continuously inject water into the hole, and block the water at the hole to ensure that the water fills the entire hole. When dozens of hole sections are tested in one hole, dozens of times are required. Water injection and water plugging cycle operations are extremely time-consuming and labor-intensive, and the operation is even more difficult when drilling upside-down holes or holes in strong permeable belts. The above situation greatly limits the promotion and application of acoustic wave testing technology in the field.
目前国内外在声波测试上，主要通过两种途径解决上述问题，第一种途径是不使用耦合剂，在发射探头加大震源发射功率或在接收探头安装信号放大设置，提高接收信号的能力。这种方法能在一定程度上结解决问题，但工作实践表明，监测效果并不理想，其原因在于增大发射功率，但由于探测系统与孔壁耦合不佳，发射端能量在进入探测体之前就损失殆尽；而增强接受信号，很容易受到背景噪声的干扰。第二种途径是从声波探头与孔壁耦合入手，有孔口封堵法，出发点是使孔内形成密闭空间，目的是使注入的水保证充满测试孔，这种方法孔口封堵设备固定，在一孔内需要做多个部位的声波测试时，移动声波探头极为不便，声波探头移动到接近孔口位置进行测试时，如果整个测试孔孔壁有一段存在较大的透水破碎带时，就需要加大注水量，否则很难保证孔内水的充满。At present, there are mainly two ways to solve the above problems in the acoustic wave testing at home and abroad. The first way is to increase the transmission power of the seismic source on the transmitting probe or install signal amplification settings on the receiving probe to improve the ability of receiving signals without using couplant. This method can solve the problem to a certain extent, but the work practice shows that the monitoring effect is not ideal. It will be lost; and the enhanced reception signal is easily interfered by background noise. The second way is to start with the coupling between the acoustic wave probe and the hole wall. There is an orifice sealing method. The starting point is to form a closed space in the hole, and the purpose is to ensure that the injected water fills the test hole. In this method, the orifice sealing equipment is fixed. , it is extremely inconvenient to move the sonic probe when it is necessary to perform sonic tests on multiple parts in one hole. It is necessary to increase the amount of water injection, otherwise it is difficult to ensure that the water in the hole is full.
发明内容Contents of the invention
为解决上述技术问题，本发明的目的在于提供一种自动耦合声波测试系统及声波测试方法，既能保证测试结果的稳定性和准确性，又能高效地省时省力地进行声波测试。为实现上述发明目的，本发明通过以下技术方案实现：In order to solve the above technical problems, the object of the present invention is to provide an automatic coupling acoustic wave testing system and acoustic testing method, which can not only ensure the stability and accuracy of test results, but also efficiently and time-savingly conduct acoustic testing. In order to achieve the above-mentioned purpose of the invention, the present invention is achieved through the following technical solutions:
一种自动耦合声波测试系统，主要包括声波测试设备和注水加压设备两部分，其中声波测试设备包括声波探头，声波探头一端设有进水接头，进水接头上设有进水孔、声波信号电缆通道孔和推送杆连接螺栓，声波探头另一端设置有固定短杆；其中声波测试设备还包括柔性弱透水袋，套装在声波探头外，该柔性弱透水袋包括密封段和工作段。An automatic coupling acoustic wave testing system, mainly including two parts: acoustic wave testing equipment and water injection pressurization equipment, wherein the acoustic wave testing equipment includes an acoustic wave probe, one end of the acoustic wave probe is provided with a water inlet connector, and the water inlet connector is provided with a water inlet hole, and the acoustic wave signal The cable passage hole and the push rod are connected with bolts, and the other end of the acoustic wave probe is provided with a fixed short rod; the acoustic wave testing equipment also includes a flexible impervious bag, which is set outside the acoustic wave probe, and the flexible impermeable bag includes a sealing section and a working section.
注水加压设备包括水箱、注水加压水泵、水压表和注水管，注水管分为两段，一段连接水箱和注水加压水泵，另一段连接注水加压水泵和声波测试设备进水接头的进水孔，该段上安装有三通接头，三通接头上安装水压表。The water injection and pressurization equipment includes a water tank, a water injection pressurization pump, a water pressure gauge and a water injection pipe. The water injection pipe is divided into two sections, one section is connected to the water tank and the water injection pressurization pump, and the other section is connected to the water injection pressurization pump and the inlet joint of the acoustic wave test equipment. A water inlet, a tee joint is installed on this section, and a water pressure gauge is installed on the tee joint.
为了更好地密封柔性弱透水袋，在进水接头外侧和固定短杆外侧均设有三道环形止水槽。In order to better seal the flexible impermeable water bag, three ring-shaped water stop grooves are arranged on the outside of the water inlet joint and the outside of the fixed short rod.
柔性弱透水袋两端紧紧包在进水接头和固定短杆上，并在环形止水槽处困扎，保证密封不漏水，柔性弱透水袋在设计水压下的透水量不超过注水设备最大注水量的10％。柔性弱透水袋的密封段为不透水橡胶材料，工作段为柔性弱透水性材料。不透水橡胶材料采用具有良好的气密性、耐热性、弹性、耐老化性及较小的永久变形的一般用丁基橡胶材料。柔性弱透水材料采用有一定弹性、有较高强度和一定透水性的棉纱布料。密封段保证了袋内冲水不向两端产生大量漏水，减少用水量。The two ends of the flexible and weakly permeable bag are tightly wrapped on the water inlet joint and the fixed short rod, and are tied at the ring-shaped water stop to ensure that there is no water leakage. The water permeability of the flexible and weakly permeable bag under the design water pressure does not exceed the maximum water injection equipment. 10% of the water injection volume. The sealing section of the flexible weakly water-permeable bag is made of water-impermeable rubber material, and the working section is made of flexible weakly water-permeable material. The impermeable rubber material adopts general-purpose butyl rubber material with good air tightness, heat resistance, elasticity, aging resistance and small permanent deformation. The soft and impervious material adopts cotton yarn cloth with certain elasticity, high strength and certain water permeability. The sealing section ensures that the flushing water in the bag does not leak a lot of water to both ends, reducing water consumption.
柔性弱透水袋具有一定的透水性，主要体现在材料的渗透系数上，其渗透系数要稍大于孔壁岩体的透水系数，保证透水袋与孔壁之间缝隙能充满水，但透水量不能大于注水设备的注水量，一般控制在其透水量不超过注水量的1/10左右。The flexible and weakly permeable bag has a certain degree of water permeability, which is mainly reflected in the permeability coefficient of the material. The permeability coefficient is slightly greater than the water permeability coefficient of the hole wall rock mass, so as to ensure that the gap between the water permeable bag and the hole wall can be filled with water, but the water permeability cannot be greater than the water injection The water injection volume of the equipment is generally controlled so that the water permeability does not exceed about 1/10 of the water injection volume.
本发明的自动耦合声波测试系统的声波测试方法主要包括以下步骤：The acoustic wave testing method of the automatic coupling acoustic wave testing system of the present invention mainly comprises the following steps:
(1)在声波测试设备进水口处连接进水管，连接部位做好密封，进水管另一端连接注水加压水泵，三通接头上装好水压表，另一段注水管连接水箱和注水加压水泵；(1) Connect the water inlet pipe at the water inlet of the acoustic wave testing equipment, and seal the connection part well. The other end of the water inlet pipe is connected to the water injection pressurized water pump, and the water pressure gauge is installed on the tee joint. The other section of the water injection pipe is connected to the water tank and the water injection pressurized water pump ;
(2)大致估算声波测试设备到水压表的垂直高度，保证声波测试设备柔性弱透水袋内水压保持在0.05-0.01MPa的水压，根据垂直高度计算压力表处的水压值，设定好加水压力；(2) Roughly estimate the vertical height from the acoustic wave testing equipment to the water pressure gauge, and ensure that the water pressure in the flexible and impermeable water bag of the acoustic wave testing equipment is kept at 0.05-0.01MPa. Calculate the water pressure value at the pressure gauge according to the vertical height, and set Set the water pressure;
(3)准备工作就绪后，在推送杆连接螺栓处安装推送杆，通过推送杆将声波测试设备推送到孔内指定深度；(3) After the preparations are ready, install the push rod at the connecting bolt of the push rod, and push the acoustic wave testing equipment to the specified depth in the hole through the push rod;
(4)通过注水加压水泵向声波测试设备的柔性弱透水袋内进行注水加压，柔性弱透水袋内空气通过弱透水袋排出，柔性弱透水袋扩张并胀满测试孔段与孔壁接触，充满水后，袋内水通过弱头水袋向外渗漏充满袋与孔壁之间的空隙，并通过设定好的一定压力，保证了探头与孔壁的良好耦合；(4) Water injection and pressurization is carried out into the flexible impermeable bag of the acoustic wave testing equipment through the water injection pressurized water pump, the air in the flexible impermeable bag is discharged through the impermeable bag, and the flexible impermeable bag expands and fills up the test hole section and contacts the hole wall , after being filled with water, the water in the bag leaks outward through the weak head water bag to fill the gap between the bag and the hole wall, and a certain pressure is set to ensure a good coupling between the probe and the hole wall;
(5)在注水到设定压力后，注水加压泵持续进行补压工作，开始进行声波测试；(5) After the water is injected to the set pressure, the water injection booster pump continues to perform the pressure supplement work, and starts the sonic test;
(6)一个孔段测试完后，通过注水加压泵的卸压孔，将柔性弱透水袋内的水部分排出，透水袋收缩，脱离孔壁，避免测试设备前后移动时损坏弱透水带结构；(6) After a hole section is tested, the water in the flexible impermeable bag is discharged through the pressure relief hole of the water injection booster pump, and the water-permeable bag shrinks and breaks away from the hole wall to avoid damage to the structure of the impermeable belt when the test equipment moves back and forth ;
(7)通过推送杆，将声波测试设备推送到另一孔段，重新注水加压，待水压到指定水压值时，后续持续补压，即可进行另一孔段测试。(7) Push the acoustic wave testing equipment to another hole section through the push rod, refill water and pressurize, and when the water pressure reaches the specified water pressure value, continue to add pressure to carry out another hole section test.
推送杆前后推送声波测试设备时，电缆线和注水管一起前后移动。注水加压水泵可以是手压水泵或电动补水泵，是否需要补压可通过人工控制或通过智能自动化控制。When the push lever pushes the acoustic wave test equipment back and forth, the cable and the water injection pipe move back and forth together. The water injection pressurization pump can be a manual water pump or an electric supplementary water pump, and whether supplementary pressure is required can be controlled manually or through intelligent automation.
根据上述技术方案，本发明的自动耦合柔性弱透水声波测试系统由于采用了柔性弱透水袋，柔性保证了一种类型可适用于大小不同孔径。弱透水性，可以不必端部设排气孔，并且保证工作段袋与孔壁之间充满水，可有效的保证测试段内探头与孔壁耦合问题。According to the above technical solution, the automatic coupling flexible weakly permeable acoustic wave testing system of the present invention adopts the flexible weakly permeable bag, and the flexibility ensures that one type can be applied to different sizes of apertures. Weak water permeability, there is no need to set vent holes at the end, and it is ensured that the space between the working section bag and the hole wall is filled with water, which can effectively ensure the coupling between the probe and the hole wall in the test section.
附图说明Description of drawings
图1是本发明的自动耦合声波测试系统的整体结构示意图。FIG. 1 is a schematic diagram of the overall structure of the automatic coupling acoustic wave testing system of the present invention.
图2是本发明的声波测试设备中的声波探头的截面图。Fig. 2 is a cross-sectional view of the acoustic wave probe in the acoustic wave testing device of the present invention.
图3是本发明的柔性弱透水袋的结构示意图Fig. 3 is a structural schematic diagram of the flexible impermeable water bag of the present invention
图4是本发明的声波测试设备中的声波探头的侧视图。Fig. 4 is a side view of the acoustic wave probe in the acoustic wave testing device of the present invention.
其中，1-声波探头，2-柔性弱透水袋，3-进水接头，4-固定短杆，5-止水槽，6-止水槽，7-进水孔，8-声波信号电缆通道孔，9-水箱，10-注水加压水泵，11-注水管，12-水压表，13-三通接头，14-推送杆连接螺栓，15-工作段，16-密封段Among them, 1-acoustic probe, 2-flexible impermeable water bag, 3-water inlet joint, 4-fixed short rod, 5-water stop groove, 6-water stop groove, 7-water inlet hole, 8-acoustic signal cable channel hole, 9-Water tank, 10-Water injection booster pump, 11-Water injection pipe, 12-Water pressure gauge, 13-Tee joint, 14-Push rod connecting bolt, 15-Working section, 16-Sealing section
具体实施方式：Detailed ways:
本发明的自动耦合声波测试系统主要由声波测试设备和注水加压设备两部分组成。如图1所示，声波测试设备包括声波探头1和柔性弱透水袋2，声波探头1一端设有进水接头3，进水接头3为一圆柱型不锈钢体，进水接头3端头上设有进水孔7、声波信号电缆通道孔8和推送杆连接螺栓14，声波电缆在声波信号电缆通道孔8处进行密封，密封材料能承受0.3MPa的压力。进水接头3外侧表面上设有三道环形止水槽5，声波探头1另一端设有一圆柱型不锈钢体固定短杆4，固定短杆4外侧表面设有三道环形止水槽6。柔性弱透水袋2由密封段和工作段两部分组成，密封段为不透水弹性较大的橡胶材料，工作段为柔性弱透水型性材料。柔性弱透水袋2套装在声波探头1外，柔性弱透水袋2两端紧紧包在进水接头3和固定短杆4上，并在环形止水槽5、6处困扎，保证密封不漏水，柔性弱透水/2在设计水压下的透水量不超过注水设备最大注水量的10％。The automatic coupling acoustic wave testing system of the present invention is mainly composed of two parts: acoustic wave testing equipment and water injection pressurizing equipment. As shown in Figure 1, the acoustic wave testing equipment includes an acoustic wave probe 1 and a flexible impermeable water bag 2. One end of the acoustic wave probe 1 is provided with a water inlet joint 3, and the water inlet joint 3 is a cylindrical stainless steel body. There are water inlet hole 7, sound wave signal cable passage hole 8 and push rod connecting bolt 14, the sound wave cable is sealed at the sound wave signal cable passage hole 8, and the sealing material can withstand the pressure of 0.3MPa. The outer surface of the water inlet joint 3 is provided with three ring-shaped water stop grooves 5, and the other end of the acoustic wave probe 1 is provided with a cylindrical stainless steel fixed short rod 4, and the outer surface of the fixed short rod 4 is provided with three ring-shaped water stop grooves 6. The flexible impervious bag 2 is composed of a sealing section and a working section. The sealing section is made of rubber material with high impermeability and elasticity, and the working section is made of flexible and impermeable material. The flexible and weakly permeable bag 2 is set outside the acoustic wave probe 1, and the two ends of the flexible and weakly permeable bag 2 are tightly wrapped on the water inlet joint 3 and the fixed short rod 4, and are tied at the ring-shaped water-stop grooves 5 and 6 to ensure watertight sealing , Flexible and weakly permeable/2 The water permeability under the design water pressure shall not exceed 10% of the maximum water injection volume of the water injection equipment.
注水加压设备由水箱9、注水加压水泵10、水压表12和注水管11组成，注水管11分为两段，一段连接水箱9和注水加压水泵10，另一段连接注水加压水泵10和声波测试设备进水接3头的进水孔7，该段上安装有三通接头，三通接头上安装水压表。The water injection and pressurization equipment is composed of a water tank 9, a water injection pressurization pump 10, a water pressure gauge 12 and a water injection pipe 11. The water injection pipe 11 is divided into two sections, one section is connected to the water tank 9 and the water injection pressurization pump 10, and the other section is connected to the water injection pressurization pump. 10 and the water inlet 7 of the water inlet connection 3 of the acoustic wave test equipment, a tee joint is installed on this section, and a water pressure gauge is installed on the tee joint.
声波测试设备由声波探头1和柔性弱透水袋2组成。声波探头1一端设有进水接头3，进水接头3端头设有进水孔7、声波信号电缆通道8和推送杆连接螺栓9。另一端设有固定短杆4，进水接头3和固定短杆4的外侧表面分别设三道止水槽5、6，柔性弱透水袋2分为密封段和工作段，套装在声波探头1外，通过密封段密封在进水接头3和固定短杆4的外侧表面上，并在止水槽5、6处环绕困扎，保证密封，密封段部分采用不透水的塑性较大、强度高的橡胶材料，工作段采用柔性弱透水、有较高强度的材料。柔性弱透水袋2工作直径比孔口直径大5-10mm左右。设在进水接头3和固定短杆4上的止水槽5、6可为多道。The acoustic wave testing equipment consists of an acoustic wave probe 1 and a flexible impermeable water bag 2 . One end of the acoustic wave probe 1 is provided with a water inlet connector 3, and the end of the water inlet connector 3 is provided with a water inlet hole 7, an acoustic signal cable channel 8 and a push rod connecting bolt 9. The other end is provided with a fixed short rod 4, and the outer surfaces of the water inlet joint 3 and the fixed short rod 4 are respectively provided with three water stop grooves 5, 6, and the flexible and impermeable water bag 2 is divided into a sealing section and a working section, and is set outside the acoustic wave probe 1 , seal on the outer surface of the water inlet joint 3 and the fixed short rod 4 through the sealing section, and wrap around the water stop groove 5 and 6 to ensure the sealing. The sealing section is made of impermeable plastic and high-strength rubber Materials, the working section is made of flexible, impermeable and high-strength materials. The working diameter of the flexible weakly permeable bag 2 is about 5-10mm larger than the diameter of the orifice. The water stop grooves 5 and 6 arranged on the water inlet joint 3 and the fixed short rod 4 can be multi-channel.
注水加压设备由水箱9、注水加压水泵10和注水管11及水压表12组成。注水加压水泵10流量控制在10-30L/min，水压表量程在1MPa，精度0.01MPa，注水管11分为两段，一段不承压连接水箱9和注水加压水泵10，另一段可承受1MPa内水压力，连接注水加压水泵10和声波测试设备进水接头的进水孔7，该段上安装有三通接头13，三通接头上安装水压表12。The water injection pressurization equipment is made up of water tank 9, water injection pressurization water pump 10, water injection pipe 11 and water pressure gauge 12. The flow rate of the water injection pressurized water pump 10 is controlled at 10-30L/min, the range of the water pressure gauge is 1MPa, and the accuracy is 0.01MPa. The water injection pipe 11 is divided into two sections. Bear the internal water pressure of 1 MPa, connect the water injection pressurized water pump 10 and the water inlet 7 of the water inlet joint of the acoustic wave testing equipment, a tee joint 13 is installed on this section, and a water pressure gauge 12 is installed on the tee joint.
进行声波测试时，在声波测试设备进水口7连接上进水管，连接部位做好密封，注水管另一端连接注水加压水泵，三通接头上装好水压表，另一段注水管连接水箱和注水加压水泵。大致估算声波测试设备到水压表的垂直高度，保证声波测试设备柔性弱透水袋内水压保持在0.05-0.01MPa的水压，根据垂直高度计算压力表处的水压值，设定好加水压力。When performing a sound wave test, connect the water inlet pipe to the water inlet 7 of the sound wave test equipment, seal the connection part well, connect the water injection pressurized water pump at the other end of the water injection pipe, install a water pressure gauge on the three-way joint, and connect the water tank and the water injection tank to the other water injection pipe. Water pump. Roughly estimate the vertical height from the sound wave test equipment to the water pressure gauge, ensure that the water pressure in the flexible and impermeable water bag of the sound wave test equipment is kept at 0.05-0.01MPa, calculate the water pressure value at the pressure gauge according to the vertical height, and set the water supply pressure.
准备工作就绪后，在推送杆连接螺栓14上安装上推送杆，通过推送杆将声波测试设备推送到孔内指定深度。通过注水加压水泵向声波测试设备的柔性弱透水袋内进行注水加压，柔性弱透水袋内空气通过弱透水带排出，柔性弱透水带扩张并胀满测试孔段与孔壁接触，充满水后，袋内水通过弱头水袋向外渗漏充满袋与孔壁之间的空隙，并通过设定好的一定压力，保证了探头与孔壁的良好耦合。在注水到设定压力后，注水加压泵持续进行补压工作，就可以进行声波的测试。After the preparations are ready, the push rod is installed on the push rod connecting bolt 14, and the acoustic wave testing equipment is pushed to the specified depth in the hole through the push rod. The water injection pressurization pump is used to inject water into the flexible impermeable bag of the acoustic wave testing equipment. The air in the flexible impermeable bag is discharged through the impermeable belt, and the flexible impermeable belt expands and fills up. The test hole section contacts the hole wall and is filled with water. Finally, the water in the bag leaks outward through the weak head water bag to fill the gap between the bag and the hole wall, and a certain pressure is set to ensure a good coupling between the probe and the hole wall. After the water is injected to the set pressure, the water injection booster pump continues to perform pressure supplementation work, and the sonic test can be performed.
一个孔段测试完后，通过注水加压泵的卸压孔，将柔性弱透水带内的水部分排出，透水袋收缩，脱离孔壁，避免测试设备前后移动时损坏弱透水带结构。通过推送杆，将声波测试设备推送到另一孔段，重新注水加压，待水压到指定水压值时，后续持续补压，即可进行另一孔段测试。After a hole section is tested, part of the water in the flexible impermeable zone is discharged through the pressure relief hole of the water injection booster pump, and the permeable bag shrinks and breaks away from the hole wall to avoid damage to the structure of the impermeable zone when the test equipment moves back and forth. Push the acoustic wave testing equipment to another hole section through the push rod, refill water and pressurize, and when the water pressure reaches the specified water pressure value, continue to add pressure to carry out another hole section test.
推送杆前后推送声波测试设备时，电缆线和注水管一起前后移动。注水加压水泵可以是手压水泵或电动补水泵，是否需要补压可通过人工控制或通过智能自动化控制。由于采用了上述技术方案，本柔性弱透水声波测试设备系统，由于采用了柔性弱透水袋，柔性保证了一种类型可适用于大小不同孔径。弱透水性，可以不必端部设排气孔，并且保证工作段袋与孔壁之间充满水，可有效的保证测试段内探头与孔壁耦合问题。使用透水袋结构，可免去了孔口堵水措施，并且不必要求整个孔内充满水，大大减小了注水量和注水时间。加压水泵采取一定压力，可保证弱透水带充分扩张接触孔壁，并且袋内充满水。这种设计方案，解决了原来在平孔、仰孔进行声波测试中既费时又费力的操作，并且也解决了当钻孔内存在强漏水带无法在孔内注满水的难题，及解决了复杂环境中的声波测试问题，又大大提高了工作效率，有着显著的积极效果，具有一定的应用和推广价值。When the push lever pushes the acoustic wave test equipment back and forth, the cable and the water injection pipe move back and forth together. The water injection pressurization pump can be a manual water pump or an electric supplementary water pump, and whether supplementary pressure is required can be controlled manually or through intelligent automation. Due to the adoption of the above-mentioned technical scheme, the flexible and weakly permeable acoustic wave testing equipment system adopts the flexible weakly permeable bag, and the flexibility ensures that one type can be applied to apertures of different sizes. Weak water permeability, there is no need to set vent holes at the end, and it is ensured that the space between the working section bag and the hole wall is filled with water, which can effectively ensure the coupling between the probe and the hole wall in the test section. The use of the permeable bag structure can eliminate the need for water blocking measures at the orifice, and it is not necessary to require the entire hole to be filled with water, which greatly reduces the amount of water injection and the time of water injection. The pressurized water pump adopts a certain pressure to ensure that the aqueduct fully expands the contact hole wall, and the bag is filled with water. This design scheme solves the time-consuming and laborious operation in the acoustic wave test of the flat hole and the upward hole, and also solves the problem that the hole cannot be filled with water when there is a strong water leakage zone in the drill hole, and solves the problem of The problem of sound wave testing in complex environments has greatly improved work efficiency, has a significant positive effect, and has certain application and promotion value.
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