CN205192426U - Round hole inner wall hoop strain meter - Google Patents
Round hole inner wall hoop strain meter Download PDFInfo
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- CN205192426U CN205192426U CN201520969759.0U CN201520969759U CN205192426U CN 205192426 U CN205192426 U CN 205192426U CN 201520969759 U CN201520969759 U CN 201520969759U CN 205192426 U CN205192426 U CN 205192426U
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- 229910000831 Steel Inorganic materials 0.000 claims abstract description 75
- 239000010959 steel Substances 0.000 claims abstract description 75
- 238000005259 measurement Methods 0.000 abstract description 3
- 230000035945 sensitivity Effects 0.000 abstract description 3
- 238000013461 design Methods 0.000 abstract description 2
- 239000011435 rock Substances 0.000 description 16
- 238000000034 method Methods 0.000 description 4
- 238000012360 testing method Methods 0.000 description 4
- 238000009412 basement excavation Methods 0.000 description 1
- 239000012141 concentrate Substances 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000000149 penetrating effect Effects 0.000 description 1
- 238000002360 preparation method Methods 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 239000002689 soil Substances 0.000 description 1
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Abstract
本实用新型公开了一种圆孔内壁环向应变计，包括刚环，刚环上开设有一个开口，刚环内设有平行布置的第一支架和第二支架，第一支架和第二支架的一端分别固定在开口处；还包括第一钢片和应变式传感器，应变式传感器包括第二钢片和电阻片，第二钢片上开设有凹槽，电阻片贴在凹槽的底部，电阻片连接的电缆从圆孔内引出；第一钢片的一端与第一支架的另一端固定连接，第一钢片的另一端设有贯穿第一钢片的螺丝，螺丝的端头与第二钢片的一端抵触，第二钢片的另一端固定在第二支架的另一端，第一钢片和第二钢片呈水平布置。本实用新型设计合理，结构简单，灵敏度高，稳定性好，适用于内孔的应变测量。
The utility model discloses a circumferential strain gauge on the inner wall of a round hole, which comprises a rigid ring, an opening is opened on the rigid ring, a first bracket and a second bracket arranged in parallel are arranged in the rigid ring, and the first bracket and the second bracket are arranged in parallel. One end of each is fixed at the opening; it also includes a first steel sheet and a strain sensor, the strain sensor includes a second steel sheet and a resistance sheet, a groove is opened on the second steel sheet, the resistance sheet is attached to the bottom of the groove, and the resistance The cable connected with the sheet is led out from the round hole; one end of the first steel sheet is fixedly connected with the other end of the first bracket, and the other end of the first steel sheet is provided with a screw passing through the first steel sheet, and the end of the screw is connected with the second One end of the steel sheet is in conflict, the other end of the second steel sheet is fixed on the other end of the second support, and the first steel sheet and the second steel sheet are arranged horizontally. The utility model has the advantages of reasonable design, simple structure, high sensitivity and good stability, and is suitable for strain measurement of inner holes.
Description
技术领域 technical field
本实用新型涉及岩石变形测量，具体是指一种圆孔内壁环向应变计。 The utility model relates to rock deformation measurement, in particular to a circumferential strain gauge on the inner wall of a circular hole.
背景技术 Background technique
随着工程建设的复杂程度不断加大，为了更好地了解现场岩体的力学性质，需要对岩岩石进行室内力学试验研究以获取复杂应力作用下岩石的强度、变形和破坏形态。避免因岩石的变形破坏造成重大的工程事故。 As the complexity of engineering construction continues to increase, in order to better understand the mechanical properties of the rock mass on site, it is necessary to conduct laboratory mechanical tests on the rock to obtain the strength, deformation and failure form of the rock under complex stress. Avoid major engineering accidents caused by rock deformation and damage.
工程岩体现场开挖过程中岩体内部的应力状态极为复杂，表现为：应力主轴方向不变情况下主应力大小变化、主应力大小不变情况下应力主轴旋转、应力主轴方向旋转及主应力大小变化。从宏观角度考虑，上述应力状态的改变会导致岩体产生塑性变形，弹性参数和强度参数发生改变；从微观角度考虑，岩体内部有微裂隙产生、贯通和扩展。 During the site excavation of engineering rock mass, the stress state inside the rock mass is extremely complex, which is manifested as: the change of the principal stress when the direction of the principal axis of stress remains unchanged, the rotation of the principal axis of stress when the magnitude of the principal stress remains unchanged, the rotation of the direction of the principal axis of stress and the rotation of the principal stress Size changes. From a macroscopic point of view, the above-mentioned changes in the stress state will lead to plastic deformation of the rock mass, and changes in elastic parameters and strength parameters; from a microscopic point of view, micro-cracks are generated, penetrated, and expanded inside the rock mass.
目前，依据空心圆柱形试样的受力特点，岩土工程技术领域已开发出适用于土试样以及岩石试样的空心圆柱扭剪仪，可以实现应力主轴旋转等复杂的应力路径。针对岩石空心圆柱扭剪仪，应变测量目前主要采用在岩石试样表面粘贴应变片的方式，该种方式主要存在以下缺点：1)加工岩石试样过程中，内孔的内壁不光滑，有钻纹，应变片不能与岩石试样内壁进行很好的贴合；2)用于试验的岩石试样尺寸较小，在岩石试样内孔中粘贴应变片的工作空间小，很难控制应变片的粘贴位置，致使测得的应变产生误差；3)应变片很脆弱，在后期岩石试样制备过程中易损坏，而一旦发生损坏，就只能放弃该位置的数据采集，致使得到的数据不完整；4)应变片测得的数据只能反映粘贴区域局部的变形，具有局限性。 At present, according to the mechanical characteristics of hollow cylindrical samples, the field of geotechnical engineering technology has developed a hollow cylindrical torsional shear instrument suitable for soil samples and rock samples, which can realize complex stress paths such as the rotation of the stress axis. For the rock hollow cylinder torsional shear instrument, strain gauges are mainly used to measure the strain gauge on the surface of the rock sample. This method has the following disadvantages: 1) During the process of processing the rock sample, the inner wall of the inner hole is not smooth, and there are drill holes. 2) The size of the rock sample used for the test is small, and the working space for pasting the strain gauge in the inner hole of the rock sample is small, so it is difficult to control the strain gauge. 3) The strain gauge is very fragile and is easily damaged in the later rock sample preparation process, and once damaged, the data acquisition at this position can only be abandoned, resulting in the obtained data being inaccurate. Complete; 4) The data measured by the strain gauge can only reflect the local deformation of the paste area, which has limitations.
应变片法精度和可靠性不高，操作麻烦，造成试验数据采集受限，影响试验结果的分析。 The accuracy and reliability of the strain gauge method are not high, and the operation is cumbersome, which limits the collection of test data and affects the analysis of test results.
发明内容 Contents of the invention
本实用新型的目的就是要提供一种圆孔内壁环向应变计，通过与圆孔内壁贴合的刚环将圆孔内壁的变形传递到第一钢片的螺丝上，从而使螺丝的端头给第二钢片的一端施加压力，由于第二钢片的另一端固定，使得第二钢片发生变形，这样可以实现将圆孔内壁的变形成倍地放大到电阻片所在的位置上。 The purpose of this utility model is to provide a circular hole inner wall circumferential strain gauge, the deformation of the inner wall of the circular hole is transmitted to the screw of the first steel plate through the rigid ring attached to the inner wall of the circular hole, so that the end of the screw Apply pressure to one end of the second steel sheet, and because the other end of the second steel sheet is fixed, the second steel sheet is deformed, so that the deformation of the inner wall of the circular hole can be multiplied to the position where the resistance sheet is located.
为实现上述目的，本实用新型所设计的一种圆孔内壁环向应变计，用于放置在圆孔内测量圆孔内壁的变形，它包括刚环，所述刚环上开设有一个开口，所述刚环内设有平行布置的第一支架和第二支架，所述第一支架和第二支架的一端分别固定在开口处，所述第一支架、第二支架与刚环为一体结构；还包括第一钢片和应变式传感器，所述应变式传感器包括第二钢片和电阻片，所述第二钢片上开设有凹槽，所述电阻片贴在凹槽的底部，电阻片连接的电缆从圆孔内引出；所述第一钢片的一端与第一支架的另一端固定连接，所述第一钢片的另一端设有贯穿第一钢片的螺丝，所述螺丝的端头与第二钢片的一端抵触，所述第二钢片的另一端固定在第二支架的另一端，所述第一钢片和第二钢片呈水平布置。 In order to achieve the above purpose, a circular strain gauge on the inner wall of a circular hole designed by the utility model is used to place in the circular hole to measure the deformation of the inner wall of the circular hole. It includes a rigid ring, and an opening is provided on the rigid ring. The rigid ring is provided with a first bracket and a second bracket arranged in parallel, and one end of the first bracket and the second bracket is respectively fixed at the opening, and the first bracket, the second bracket and the rigid ring are integrally structured ; Also include a first steel sheet and a strain sensor, the strain sensor includes a second steel sheet and a resistance sheet, a groove is provided on the second steel sheet, the resistance sheet is attached to the bottom of the groove, and the resistance sheet The connected cable is led out from the round hole; one end of the first steel sheet is fixedly connected to the other end of the first bracket, and the other end of the first steel sheet is provided with a screw that goes through the first steel sheet, and the screw of the screw The end is in conflict with one end of the second steel sheet, the other end of the second steel sheet is fixed to the other end of the second bracket, and the first steel sheet and the second steel sheet are arranged horizontally.
优选地，所述电阻片靠近第二钢片的另一端，远离第二钢片的一端。 Preferably, the resistance sheet is close to the other end of the second steel sheet and far away from one end of the second steel sheet.
进一步地，所述第一钢片的一端通过销轴与第一支架的另一端固定连接，所述第二钢片的另一端通过销轴与第二支架的另一端固定连接。 Further, one end of the first steel sheet is fixedly connected to the other end of the first bracket through a pin shaft, and the other end of the second steel sheet is fixedly connected to the other end of the second bracket through a pin shaft.
再进一步地，所述第一支架和第二支架的两端平齐。 Still further, both ends of the first bracket and the second bracket are flush.
更进一步地，所述第一钢片的另一端与第二钢片的一端平齐。 Furthermore, the other end of the first steel sheet is flush with one end of the second steel sheet.
本实用新型的优点在于： The utility model has the advantages of:
其一，本实用新型通过与圆孔内壁贴合的刚环将圆孔内壁的变形传递到第一钢片的螺丝上，从而使螺丝的端头给第二钢片的一端施加压力，由于第二钢片的另一端固定，使得第二钢片发生变形，这样可以实现将圆孔内壁的变形成倍地放大到电阻片所在的位置上。 First, the utility model transmits the deformation of the inner wall of the round hole to the screw of the first steel sheet through the rigid ring attached to the inner wall of the round hole, so that the end of the screw exerts pressure on one end of the second steel sheet. The other end of the second steel sheet is fixed so that the second steel sheet is deformed, so that the deformation of the inner wall of the circular hole can be multiplied to the position where the resistance sheet is located.
其二，本实用新型的第二钢片在电阻片位置对应的钢片厚度小于其它位置对应的钢片厚度，这使得第二钢片发生变形主要集中在电阻片对应的钢片位置上，使得整个应变计灵敏度高。 Its two, the thickness of the steel sheet corresponding to the second steel sheet of the utility model at the position of the resistance sheet is smaller than the thickness of the steel sheet corresponding to other positions, which makes the deformation of the second steel sheet mainly concentrate on the position of the steel sheet corresponding to the resistance sheet, so that The entire strain gauge has high sensitivity.
其三，本实用新型设计合理，结构简单，灵敏度高，稳定性好，适用于内孔的应变测量。 Third, the utility model has reasonable design, simple structure, high sensitivity and good stability, and is suitable for strain measurement of inner holes.
附图说明 Description of drawings
图1为一种圆孔内壁环向应变计的结构示意图； Fig. 1 is a structural representation of a circular hole inner wall circumferential strain gauge;
图2为图1沿A-A方向的剖面示意图； Fig. 2 is a schematic cross-sectional view along the A-A direction of Fig. 1;
图3为本实用新型刚环内的结构示意图。 Fig. 3 is a structural schematic diagram of the rigid ring of the utility model.
图中：刚环1；开口1.1；第一支架2(其中：第一销轴2.1)；第二支架3(其中：第二销轴3.1)；第一钢片4；螺丝4.1；应变式传感器5(其中：第二钢片5.1，电阻片5.2，凹槽5.11)；电缆6。 In the figure: rigid ring 1; opening 1.1; first bracket 2 (among them: first pin shaft 2.1); second bracket 3 (among them: second pin shaft 3.1); first steel sheet 4; screw 4.1; strain sensor 5 (wherein: the second steel sheet 5.1, resistance sheet 5.2, groove 5.11); cable 6.
具体实施方式 detailed description
以下结合附图和具体实施例对本实用新型作进一步的详细描述，但该实施例不应该理解为对本实用新型的限制。 The utility model will be further described in detail below in conjunction with the accompanying drawings and specific examples, but the examples should not be construed as limiting the utility model.
如图1和图2所示的一种圆孔内壁环向应变计，用于放置在圆孔内测量圆孔内壁的变形，它包括刚环1，刚环1上开设有一个开口1.1，刚环1内设有平行布置的第一支架2和第二支架3，第一支架2和第二支架3的一端分别固定在开口1.1处，第一支架2、第二支架3与刚环1为一体结构。 A circular strain gauge on the inner wall of a circular hole as shown in Figures 1 and 2 is used to place in the circular hole to measure the deformation of the inner wall of the circular hole. It includes a rigid ring 1, which is provided with an opening 1.1, rigid The ring 1 is provided with a first bracket 2 and a second bracket 3 arranged in parallel, and one end of the first bracket 2 and the second bracket 3 are respectively fixed at the opening 1.1, and the first bracket 2, the second bracket 3 and the rigid ring 1 are One structure.
该装置还包括第一钢片4和应变式传感器5。应变式传感器5包括第二钢片5.1和电阻片5.2，第二钢片5.1上开设有凹槽5.11，电阻片5.2贴在凹槽5.11的底部，电阻片5.2连接的电缆6从圆孔内引出，其中电阻片5.2靠近第二钢片5.1的另一端，远离第二钢片5.1的一端。 The device also includes a first steel sheet 4 and a strain gauge sensor 5 . The strain gauge sensor 5 includes a second steel sheet 5.1 and a resistance sheet 5.2, a groove 5.11 is opened on the second steel sheet 5.1, the resistance sheet 5.2 is attached to the bottom of the groove 5.11, and the cable 6 connected to the resistance sheet 5.2 is drawn out from the round hole , wherein the resistance sheet 5.2 is close to the other end of the second steel sheet 5.1 and away from the end of the second steel sheet 5.1.
如图3所示，第一钢片4的一端通过第一销轴2.1与第一支架2的另一端固定连接，第一钢片4的另一端设有贯穿第一钢片4的螺丝4.1，螺丝4.1的端头与第二钢片5.1的一端抵触，第二钢片5.1的另一端通过第二销轴3.1与第二支架3的另一端固定连接，第一钢片4和第二钢片5.1呈水平布置。其中，第一支架2和第二支架3的两端平齐；第一钢片4的另一端与第二钢片5.1的一端平齐。 As shown in Figure 3, one end of the first steel sheet 4 is fixedly connected to the other end of the first bracket 2 through the first pin shaft 2.1, and the other end of the first steel sheet 4 is provided with a screw 4.1 penetrating through the first steel sheet 4, The end of the screw 4.1 is in conflict with one end of the second steel sheet 5.1, the other end of the second steel sheet 5.1 is fixedly connected with the other end of the second bracket 3 through the second pin shaft 3.1, the first steel sheet 4 and the second steel sheet 5.1 is arranged horizontally. Wherein, both ends of the first bracket 2 and the second bracket 3 are flush; the other end of the first steel sheet 4 is flush with one end of the second steel sheet 5.1.
本实用新型工作时，将圆孔内壁环向应变计放置于圆孔内，与圆孔内壁贴合的刚环1将圆孔内壁的变形传递到第一钢片4的螺丝4.1上，从而使螺丝4.1的端头给第二钢片5.1的一端施加压力，由于第二钢片5.1的另一端固定，使得第二钢片5.1发生变形，这样可以实现将圆孔内壁的变形成倍地放大到电阻片5.2所在的位置上。 When the utility model works, the circular hole inner wall circumferential strain gauge is placed in the circular hole, and the rigid ring 1 attached to the circular hole inner wall transmits the deformation of the circular hole inner wall to the screw 4.1 of the first steel sheet 4, so that the The end of the screw 4.1 applies pressure to one end of the second steel sheet 5.1, and because the other end of the second steel sheet 5.1 is fixed, the second steel sheet 5.1 is deformed, so that the deformation of the inner wall of the circular hole can be multiplied to The position where the resistor sheet 5.2 is located.
本说明书中未作详细描述的内容，属于本专业技术人员公知的现有技术。 The content not described in detail in this specification belongs to the prior art known to those skilled in the art.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201520969759.0U CN205192426U (en) | 2015-11-27 | 2015-11-27 | Round hole inner wall hoop strain meter |
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| CN201520969759.0U CN205192426U (en) | 2015-11-27 | 2015-11-27 | Round hole inner wall hoop strain meter |
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| CN205192426U true CN205192426U (en) | 2016-04-27 |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105403141A (en) * | 2015-11-27 | 2016-03-16 | 中国科学院武汉岩土力学研究所 | Circumferential strain gauge for inner wall of circular hole |
| CN108775855A (en) * | 2018-07-16 | 2018-11-09 | 哈尔滨工业大学 | The measuring device of through-hole hoop strain during a kind of static crushing |
-
2015
- 2015-11-27 CN CN201520969759.0U patent/CN205192426U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105403141A (en) * | 2015-11-27 | 2016-03-16 | 中国科学院武汉岩土力学研究所 | Circumferential strain gauge for inner wall of circular hole |
| CN108775855A (en) * | 2018-07-16 | 2018-11-09 | 哈尔滨工业大学 | The measuring device of through-hole hoop strain during a kind of static crushing |
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