Combined clamping type anchor rod anti-pull test displacement measurement auxiliary device

Abstract

The utility model discloses a combined clamping type anchor rod anti-pull test displacement measurement auxiliary device, which comprises a clamping piece, a guide rail beam and at least two groups of measurement datum plates, the clamping piece is sleeved and fixed at the tail end of the exposed part of an anchor rod in a clamping manner, the guide rail beam is fixedly arranged on the clamping piece, and the guide rail beam is fixed on the clamping piece. The at least two groups of measuring datum plates are arranged at intervals along the guide rail beam and are fixedly connected with the guide rail beam, the measuring ends of the at least two groups of measuring datum plates are located in the same measuring plane, and the axis of the anchor rod is perpendicular to the measuring plane. According to the utility model, the measuring datum plate is fixed on the anchor rod through the clamping and fixing piece in a clamping and embracing manner, so that on-site welding is not needed, the anchor rod does not need to be cut, assembly and installation can be realized on site at any time, the installation efficiency is improved, and thermal damage to the anchor rod is avoided.

Description

TECHNICAL FIELD

[0001] The utility model relates to the anchor rod detection technical field, concretely relates to a combined clamping type anchor rod uplift test displacement measurement auxiliary device. BACKGROUND

[0002] Anchor rod is a kind of support structure widely used in modern construction engineering, mainly used for reinforcing building or foundation, has strong tensile strength and bearing capacity. With the passage of time, anchor rod can be influenced by various factors, such as load, earthquake, etc., resulting in problems in its stability and safety. Therefore, in the construction engineering using anchor rod, anchor rod detection is very important. Anchor rod detection report is a detailed detection result, plays a vital role in engineering safety.

[0003] According to the provisions of anchor rod uplift detection test in the specification such as "Technical Specification for Building Foundation Pit Support" JGJ120-2012, "Technical Code for Building Slope Engineering" GB50330-2013, "Technical Standard for Building Engineering Anti-floating" JGJ476-2019, "Code for Design of Building Foundation" GB50007-2011, the counterforce device mainly used in anchor rod uplift detection at present includes three types of support beam counterforce device, support stool type counterforce device and pressure plate type counterforce device, and the above specification puts forward double control requirements on force value and deformation of anchor rod uplift detection, such as: the maximum test load shall not be less than 2 times the design value and not more than 0.85 times the tensile strength design value of anchor rod body; the elastic displacement of the measured anchor rod under the action of the maximum test load shall be more than 80% of the theoretical elastic elongation value of the free section of the rod under the load, and less than the theoretical elastic elongation value of the sum of the free section length and 1 / 2 anchoring section. If the elastic displacement of the measured anchor rod is small, less than 80% of the theoretical elastic elongation value of the free section, or the stress relaxation of the anchoring anchor rod causes the resistance of the non-anchoring section of the rod to not meet the requirements. If the elastic displacement of the measured anchor rod is large, greater than the theoretical elastic elongation value of the sum of the free section length and 1 / 2 anchoring section, it indicates that the anchoring section of the anchor rod has slipped, which does not meet the acceptance requirements.

[0004] According to the specification requirements, for the support beam reaction force device, the support stool type reaction force device, the anchor rod displacement deformation measurement generally needs to set the observation reference platform from the anchor rod free end or the exposed root of the anchor rod, the current main method is to weld the inverted ''L'' type steel plate or other forms of steel plate on the anchor rod body, for the pressure plate type reaction force device, generally the anchor rod part except the through center jack is used as the fixed measurement platform, the main method is to cut and grind the anchor rod to be flat, and the exposed anchor rod section is shortened. However, the above methods have the following problems: 1, after determining the anchor rod to be detected, the observation reference platform needs to be welded before the measurement can be started, the time efficiency is not high; 2, the welding is easy to cause the thermal damage to the anchor rod, and the welding can cause the additional personnel cost and the steel plate loss; 3, the measurement result is easy to be affected by the anchor rod stretching, and the test accuracy is relatively poor. Utility model content

[0005] The utility model aims at providing a kind of combined clamping type anchor rod uplift test displacement measurement auxiliary device to solve the technical problem described in background art.

[0006] To achieve the above technical purpose, the utility model adopts the following technical scheme:

[0007] A kind of combined clamping type anchor rod uplift test displacement measurement auxiliary device, including clamping piece, guide rail beam and measurement reference plate, the clamping piece is set with and is fixed in the end of exposed part of anchor rod in the way of clamping, the guide rail beam is fixedly arranged on clamping piece, the measurement reference plate is equipped with at least two groups, at least two groups measurement reference plate are interval arranged along guide rail beam and are connected and fixed with guide rail beam, and the measurement end of at least two groups measurement reference plate is in the same measurement plane, the axis of anchor rod is perpendicular to the measurement plane.

[0008] Preferably, the clamping piece includes a hoop, a locking bolt and a connecting bolt, the hoop includes two hoop plates connected by a hinge, one of the hoop plates is connected to the locking bolt at its free end, and the other hoop plate has a notch at its free end matching the locking bolt, when the two hoop plates are buckled, the locking bolt is inserted into the notch, the switching of the hoop between open and closed states is realized by adjusting the position of the locking bolt nut, and the connecting bolt is inserted into a through hole in one of the hoop plates, and the guide rail beam has a through hole in its middle part matching the size of the connecting bolt.

[0009] Preferably, a compression spring and a washer are sleeved on the locking bolt and the connecting bolt.

[0010] Preferably, an elastic wrapping layer is further provided between the hoop and the anchor rod.

[0011] Preferably, the nuts of the locking bolt and the connecting bolt are butterfly nuts.

[0012] Preferably, the measuring reference plate comprises a reference plate body, a sliding sleeve and a limiting bolt, the reference plate body is used as a contact part of a displacement sensor measuring end, the sliding sleeve is fixed on one end of the guide rail beam, the sliding sleeve is sleeved on the guide rail beam and can slide along the guide rail beam, and the limiting bolt is arranged on the sliding sleeve, when the end of the limiting bolt abuts against the guide rail beam, the sliding sleeve is in a relatively fixed state with the guide rail beam.

[0013] Compared with the prior art, the utility model has the beneficial effects that:

[0014] 1、The utility model discloses a modular design, through the clamping fixture with the clamping and embracing mode, the measuring reference plate is fixed to the anchor rod, neither need on -the -spot welding, need not cutting anchor rod, can realize assembly installation in time on the spot, improves installation efficiency, and will not cause thermal damage to anchor rod;

[0015] 2、The utility model discloses a clamping fixture, guide rail beam and measuring reference plate can all be recycled and repeatedly used, avoid the steel loss, and be in accord with the green construction concept;

[0016] 3、The utility model discloses a spring and elastic wrapping layer, in the anchor rod drawing process, rely on high -strength pressure spring, rubber elastic wrapping layer can effectively overcome the shrinkage deformation problem of the rod body caused by the tension effect, ensure the stability of the observation point firm, make the measuring reference plate can move along with anchor rod drawing effect synchronization, improve the accuracy of test;

[0017] 4、The utility model discloses a measuring reference plate can adjust the position along the guide rail beam freely, can better adapt to the complex conditions of construction site, avoid the problem that the measurement accuracy declines or even the test cannot normally carry out because of the position conflict of the rest components and measuring reference plate. BRIEF DESCRIPTION OF DRAWINGS

[0018] The above and / or other aspects and advantages of the utility model will become more apparent and more readily appreciated from the following detailed description, taken in conjunction with the accompanying drawings, which are merely schematic and are not intended to limit the utility model, wherein:

[0019] Figure 1 It is the installation structure schematic drawing of the utility model;

[0020] Figure 2 It is the structure schematic drawing of the utility model relates to the clamping fixture;

[0021] Figure 3 It is the structure schematic drawing of the utility model's measuring reference plate.

[0022] 1, anchor rod; 2, clamping piece; 201, hoop; 202, locking bolt; 203, connecting bolt; 204, washer; 205, compression spring; 206, elastic wrapping layer; 3, guide rail beam; 4, measurement reference plate; 401, reference plate body; 402, sliding sleeve; 403, limiting bolt. DETAILED DESCRIPTION

[0023] Hereinafter, embodiments of the combined clamping type anchor rod uplift test displacement measurement auxiliary device of the present application will be described with reference to the accompanying drawings. The embodiments described herein are specific concrete embodiments of the present application, which are used to illustrate the concept of the present application, and are explanatory and exemplary, and should not be interpreted as limiting the embodiments of the present application and the scope of the present application. In addition to the embodiments described herein, those skilled in the art can also employ other technical solutions that are obvious based on the content disclosed in the claims and the description of the present application, which include technical solutions that make any obvious substitutions and modifications to the embodiments described herein.

[0024] In the description of the present application, it should be noted that the terms "front", "back", "left", "right", "top", "bottom", "up", "down", "in", "out", "horizontal", "vertical", "vertical", "inclined" and the like indicate the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, therefore cannot be understood as limiting the present application. In addition, the terms "first", "second" and the like are only for descriptive purposes, and cannot be understood as indicating or implying relative importance.

[0025] The drawings of the present specification are schematic drawings that assist in explaining the concept of the present application, and schematically represent the shape of each part and its mutual relationship. Please note that in order to clearly show the structure of each component of the embodiments of the present application, the drawings are not drawn according to the same scale. The same reference numerals are used to represent the same parts.

[0026] The principles and features of the present application will be described below in conjunction with the drawings, and the examples are only used to explain the present application and are not intended to limit the scope of the present application. The preferred embodiments of the present application will be described in detail below: Figures 1-3

[0027] As Figure 1 ​As shown, the utility model discloses a kind of combined clamping type anchor rod anti-pulling test displacement measurement auxiliary devices, including clamping piece 2, guide rail beam 3 and measurement datum plate 4, the clamping piece 2 is set and is fixed in the exposed end of anchor rod 1 in the way of clamping, the guide rail beam 3 is fixedly arranged on clamping piece 2, the measurement datum plate 4 is equipped with at least two groups, at least two groups measurement datum plate 4 are spaced apart and are fixedly connected with guide rail beam 3 along guide rail beam 3, the measurement end of at least two groups measurement datum plate 4 is in the same measurement plane, and the axis of anchor rod 1 is perpendicular to the measurement plane;

[0028] Wherein, the specific structure of clamping piece 2 can be selected according to the use demand, for example, Figure 2 As shown, in some preferred embodiments, in order to simplify the difficulty of clamping piece 2, the clamping piece 2 includes a hoop 201, a locking bolt 202 and a connecting bolt 203, the hoop 201 includes two hoop plates connected by a hinge, one of the two hoop plates is connected to the locking bolt 202 at the free end, and the other hoop plate is provided with a notch matched with the locking bolt 202 at the free end, when the two hoop plates are buckled, the locking bolt 202 is clamped in the notch, and the switching of the hoop 201 between open and closed states is realized by adjusting the position of the locking bolt 202 nut, and the connecting bolt 203 is arranged in the through hole of one of the two hoop plates of the hoop 201, and the middle of the guide rail beam 3 is provided with a through hole matched with the size of the screw rod of the connecting bolt 203.

[0029] During the pulling process of the anchor rod 1, the rod body of the anchor rod 1 may shrink and deform, which may cause the clamping piece 2 to move relative to the anchor rod 1, resulting in measurement error. Therefore, in some preferred embodiments, the locking bolt 202 and the connecting bolt 203 are provided with a compression spring 205 and a washer 204, and a rubber elastic wrapping layer 206 is further arranged between the hoop 201 and the anchor rod 1, so that the clamping piece 2 is always clamped on the anchor rod 1 by the compression spring 205 and the rubber elastic wrapping layer 206, and the guide rail beam 3 can always be tightly attached to the clamping piece 2 without relative movement, thereby overcoming the problem of rod body shrinkage and deformation caused by tension, ensuring the stability and firmness of the observation point, and moving together with the pulling effect, so as to obtain the overall extension of the anchor rod 1, ensuring the accuracy of the anchor rod 1 length measurement, improving the accuracy of the test. Of course, in order to facilitate the disassembly and assembly of the clamping piece 2 and the guide rail beam 3, the nuts of the locking bolt 202 and the connecting bolt 203 are in the form of butterfly nuts for easy tightening.

[0030] Considering that the construction site is complex, other components (such as adjacent anchor rods 1, construction tools or materials, formworks, etc.) are often arranged around the anchor rod 1, which may conflict with the measurement datum plate 4, resulting in the failure to erect the measuring instrument. Therefore, in some preferred embodiments, as shown inFigure 3 As shown, the measurement reference plate 4 comprises a reference plate body 401, a sliding sleeve 402 and a limiting bolt 403, the reference plate body 401 is the contact part of the displacement sensor measurement end, the sliding sleeve 402 is fixed on one end of the guide rail beam 3, the sliding sleeve 402 is sleeved on the guide rail beam 3 and can slide along the guide rail beam 3, the limiting bolt 403 is arranged on the sliding sleeve 402, when the end of the limiting bolt 403 abuts against the guide rail beam 3, the sliding sleeve 402 and the guide rail beam 3 are in a relatively fixed state, wherein the guide rail beam 3 and the measurement reference plate 4 are prefabricated metal steel components, the perpendicularity of which can be well maintained, at the same time, the sliding function is updated, so that the fixed position of the measurement reference plate 4 can be adjusted at any time according to the actual situation of the detection site, and the detection work is facilitated.

[0031] During the unfolding test, first, the through jack is sleeved on the anchor rod 1, then the guide rail beam 3, the measurement reference plate 4 and the clamping part 2 are assembled, then the clamping part 2 is connected with the anchor rod 1 and the hoop 201 is fixed to the root of the exposed part of the anchor rod 1 by the clamping force of the compression spring 205 at the locking bolt 202, then the mounting bracket is arranged in the pit close to the outer end reference plate body 401 of the measurement reference plate 4, then the displacement sensor is arranged on the mounting bracket, and the measurement active section is perpendicular to the reference plate body 401, the anchor rod 1 is stretched outward by the through jack, the measurement reference plate 4 moves with the anchor rod 1, the displacement sensor arranged on the mounting bracket contacts the reference plate body 401 by the measurement end, so that the displacement of the reference plate body 401 can be accurately detected, and the overall stretching length of the anchor rod 1 is obtained, so that the accuracy of the stretching length measurement of the anchor rod 1 is ensured, and the accuracy of the test is improved.

[0032] The above only describes the preferred embodiments of the present application, and is not used to limit the present application, any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. A combined clamping type anchor rod uplift test displacement measurement auxiliary device, characterized in that: The utility model relates to a kind of anchor rod measurement device, including clamp fastener (2), guide rail beam (3) and measurement reference plate (4), the clamp fastener (2) is set and is fixed in the exposed end of anchor rod (1) in a clamped manner, the guide rail beam (3) is fixedly arranged on clamp fastener (2), the measurement reference plate (4) is provided with at least two groups, at least two groups measurement reference plate (4) are spaced apart along guide rail beam (3) and are connected and fixed with guide rail beam (3), and the measurement end of at least two groups measurement reference plate (4) is in the same measurement plane, the axis of the anchor rod (1) is perpendicular to the measurement plane.

2. The combined clamping type displacement measurement auxiliary device for uplift test of anchor rod according to claim 1, characterized in that: The clamp fastener (2) includes a clamp (201), a locking bolt (202) and a connecting bolt (203), the clamp (201) includes two pieces of clamp plates connected by a hinge, the free end of one of the clamp plates is connected to the locking bolt (202) by a hinge, the free end of the other clamp plate is provided with a notch matching the locking bolt (202), when the two pieces of clamp plates are buckled, the locking bolt (202) is clamped in the notch, the opening and closing state of the clamp (201) is switched by adjusting the position of the locking bolt (202) nut, the connecting bolt (203) is arranged in the through hole of one of the clamp plates of the clamp (201), and the middle part of the guide rail beam (3) is provided with a through hole matching the size of the screw rod of the connecting bolt (203).

3. The combined clamping type displacement measurement auxiliary device for uplift test of anchor rod according to claim 2, characterized in that: The locking bolt (202) and the connecting bolt (203) are both provided with a compression spring (205) and a washer (204).

4. A combined clamped anchor rod uplift test displacement measurement auxiliary device according to claim 2 or 3, characterized in that: The clamp (201) and the anchor rod (1) are further provided with an elastic wrapping layer (206).

5. The combined clamping type displacement measurement auxiliary device for uplift test of anchor rod according to claim 2, characterized in that: The nuts of the locking bolt (202) and the connecting bolt (203) are butterfly nuts.

6. The combined clamping type displacement measurement auxiliary device for uplift test of anchor rod according to claim 1, characterized in that: The measurement reference plate (4) includes a reference plate body (401), a sliding sleeve (402) and a limiting bolt (403), the reference plate body (401) is the contact part of the displacement sensor measurement end, one end close to the guide rail beam (3) is fixed with the sliding sleeve (402), the sliding sleeve (402) is arranged on the guide rail beam (3) and can slide along the guide rail beam (3), the limiting bolt (403) is arranged on the sliding sleeve (402), when the end of the limiting bolt (403) abuts against the guide rail beam (3), the sliding sleeve (402) and the guide rail beam (3) are in a relatively fixed state.

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