Adjustable sprayed concrete impervious test piece forming device

Abstract

The utility model provides an adjustable sprayed concrete impermeability test piece forming device, which belongs to the technical field of concrete impermeability detection, and comprises a test mold shell, a connecting plate, a connecting screw rod, an adjustable bottom plate and a positioning nut, the test mold shell is of a hollow circular truncated cone structure, and the diameter is gradually reduced from top to bottom; the connecting plate is fixed to the outer wall of the test mold shell, positioning holes are formed in the connecting plate, and the multiple positioning holes are evenly formed around the test mold shell; the bottom ends of the connecting screws are fixed to the adjustable bottom plate, the connecting screws penetrate through the corresponding positioning holes, and each connecting screw is provided with two sets of positioning nuts which are located on the upper side and the lower side of the connecting plate. According to the device, the problems that the compactness of the end face of the formed sprayed concrete anti-permeability test piece is poor and the forming mechanism does not accord with the actual construction condition of the sprayed concrete by adopting an existing anti-permeability test piece forming mode are solved.

Description

TECHNICAL FIELD

[0001] The utility model belongs to the technical field of concrete impermeability detection, and specifically discloses an adjustable sprayed concrete impermeability test piece forming device. BACKGROUND

[0002] The impermeability of concrete is one of key performance indexes of the environmental erosion resistance of a concrete structure, and the advantages and disadvantages of the impermeability directly reflect the durability of the concrete structure.

[0003] The national standard "Durability Test Methods for Long-Term Performance of Ordinary Concrete" GB / T-50082-2009 of the People's Republic of China requires that the test piece for the concrete impermeability test is a solid circular truncated cone body with a top diameter of 175 mm, a bottom diameter of 185 mm and a height of 150 mm, and is an irregular test piece, and it is difficult to use the existing ordinary concrete impermeability test piece forming process to manufacture the impermeability test piece due to the special construction process of the sprayed concrete. The national standard "Technical Code for Rock Bolt and Sprayed Concrete Supporting Engineering" GB50086-2015 and the industry standard "Technical Specification for Sprayed Concrete Application" JGJ / T372-2016 do not make clear indications on the impermeability method and the test piece manufacturing method of the sprayed concrete, resulting in that the sprayed concrete impermeability test cannot be performed.

[0004] The ordinary concrete can be directly cast formed, and the sprayed concrete mixed with the quick-setting agent and sprayed formed is not applicable:

[0005] If the test piece is prepared in the circular truncated cone mold + spraying mode, the end surface compactness of the formed sprayed concrete impermeability test piece is poor due to the rebound;

[0006] If the test piece is prepared in the circular truncated cone mold + pouring mixed with the quick-setting agent mode, the forming mechanism is changed, and the formed sprayed concrete impermeability test piece does not conform to the actual construction condition of the sprayed concrete;

[0007] The above two modes cannot truly represent the sprayed concrete material, the test result does not conform to the actual situation, has no representative meaning, and cannot reflect the real impermeability of the sprayed concrete. INVENTION CONTENTS

[0008] The utility model provides a kind of adjustable sprayed concrete impermeability test piece forming device, improve the impermeability test piece forming mode of adoption, the end surface compactness of the sprayed concrete impermeability test piece formed is poor and the forming mechanism does not conform to the actual construction condition of the sprayed concrete.

[0009] The adjustable sprayed concrete impermeability test piece forming device, comprising a test mold shell, a connecting plate, connecting screws, an adjustable bottom plate and positioning nuts, the test mold shell is a hollow circular truncated cone structure with a diameter gradually decreasing from top to bottom, the connecting plate is fixed on the outer wall of the test mold shell, the connecting plate is provided with positioning holes, and the positioning holes are evenly arranged around the test mold shell, the bottom end of the connecting screw is fixed on the adjustable bottom plate, the connecting screws pass through the corresponding positioning holes, and each connecting screw is provided with two groups of positioning nuts, and the two groups of positioning nuts are located on the upper and lower sides of the connecting plate.

[0010] In the adjustable sprayed concrete impermeability test piece forming device, two annular marks are arranged on the inner wall of the test mold shell, and the distance between the two annular marks is the height of the sprayed concrete impermeability test piece.

[0011] In the adjustable sprayed concrete impermeability test piece forming device, the annular marks are annular grooves or annular protrusions.

[0012] In the adjustable sprayed concrete impermeability test piece forming device, the connecting plate is integral, and the positioning holes are evenly arranged on the connecting plate.

[0013] Preferably, the connecting plate and the adjustable bottom plate are square, the positioning holes are arranged on the four corners of the connecting plate, and the connecting screws are arranged on the four corners of the adjustable bottom plate.

[0014] In the adjustable sprayed concrete impermeability test piece forming device, the connecting plate is split, and the connecting plates are evenly fixed on the outer wall of the test mold shell, and each connecting plate is provided with a positioning hole.

[0015] In the adjustable sprayed concrete impermeability test piece forming device, the adjustable bottom plate is provided with an annular closed groove, and the annular closed groove is matched with the lower end opening of the test mold shell.

[0016] In the adjustable sprayed concrete impermeability test piece forming device, the connecting screw is a full-thread screw, and the positioning nut on the upper side of the connecting plate is a hand screw nut.

[0017] The adjustable sprayed concrete impermeability test piece forming device is made of anti-rust metal material.

[0018] Compared with the prior art, the adjustable sprayed concrete impermeability test piece forming device has the following beneficial effects:

[0019] The utility model discloses a spacing between the test mould connecting plate and the adjustable bottom plate can be flexibly adjusted according to the maximum size of the sprayed concrete gravel and the setting time of the sprayed concrete, ensure that when preparing the test piece, the concrete in the bottom cavity of the test mould shell is filled densely and fully simulates the formation mechanism of the sprayed concrete entity, the test piece cutting position mark is formed through the annular mark of the test mould shell inner wall, then the test piece is cut and ground, and finally the sprayed concrete test piece meeting the requirements of the permeability test is prepared, the problems that the end surface density of the sprayed concrete permeability test piece prepared by using the existing permeability test piece forming mode is poor and the permeability test piece prepared does not conform to the actual sprayed concrete construction are solved, and necessary guarantee is provided for accurately determining the permeability of the sprayed concrete. BRIEF DESCRIPTION OF DRAWINGS

[0020] In order to more clearly illustrate the specific embodiment of the utility model or the technical scheme in the prior art, the drawings needed to be used in the specific embodiment or the prior art description will be briefly introduced below, and obviously, the drawings in the following description are some embodiments of the utility model, and those skilled in the art can also obtain other drawings according to these drawings without creative labor.

[0021] Figure 1 It is the structure schematic diagram of adjustable sprayed concrete permeability test piece forming device.

[0022] Figure 2 It is the structure schematic diagram of adjustable sprayed concrete permeability test piece forming device. Figure 1 It is the top view of the utility model.

[0023] Figure 3 It is the enlarged view of place A in the utility model. Figure 1

[0024] Figure 4 It is the enlarged view of place B in the utility model. Figure 1

[0025] Figure 5 It is the enlarged view of place C in the utility model. Figure 1

[0026] In the drawing: 1, test mould shell, 2, connecting plate, 3, connecting screw, 4, detachable bottom plate, 5, positioning nut, 6, annular mark, 7, annular closed groove. DETAILED DESCRIPTION

[0027] ​​​In order to make the purpose, technical scheme and advantages of the embodiments of the utility model clearer, the technical scheme of the embodiments of the utility model will be clearly and completely described below in conjunction with the drawings of the embodiments of the utility model. Obviously, the described embodiments are part of the embodiments of the utility model, rather than all the embodiments. Based on the described embodiments of the utility model, all other embodiments obtained by those of ordinary skill in the art without creative labor fall within the scope of protection of the utility model, unless otherwise defined, and the technical terms or scientific terms used herein should be understood as the usual meaning by those skilled in the art in the field to which the utility model belongs.

[0028] In the description of the utility model, it should be pointed out that the orientation or position relationship indicated by the terms "upper", "middle", "lower", "inner", "outer", "four corners" and the area or volume relationship indicated by "large" and "small" are based on the orientation, position, area or volume relationship shown in the drawings, which is only for the convenience of describing the utility model and simplifying the description, and is not intended to indicate or imply that the indicated device or element must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation on the utility model. Figure 1

[0029] In the description of the utility model, it should be pointed out that, unless otherwise explicitly specified and limited, the terms "provided with", "fixed", "connected" and the like should be broadly understood, for example, "connected" can be fixedly connected or detachably connected. For those of ordinary skill in the art, the specific meaning of the above terms in the utility model can be understood according to the specific circumstances.

[0030] The embodiment provides a sprayable concrete impermeable test piece forming device, which comprises a test mold shell 1, a connecting plate 2, a connecting screw 3, an adjustable bottom plate 4 and a positioning nut 5; the test mold shell 1 is a hollow circular truncated cone structure, the diameter gradually decreases from top to bottom, and the included angle of the two sides of the test mold shell 1 is a fixed included angle, which is consistent with the included angle of a traditional φ185*φ175*150 impermeable test mold; the connecting plate 2 is fixed on the outer wall of the test mold shell 1, the connecting plate 2 is provided with positioning holes, and a plurality of positioning holes are uniformly arranged around the test mold shell 1; the bottom end of the connecting screw 3 is fixed on the adjustable bottom plate 4, a plurality of connecting screws 3 pass through the corresponding positioning holes, two groups of positioning nuts 5 are installed on each connecting screw 3, and the two groups of positioning nuts 5 are located on the upper and lower sides of the connecting plate 2. A spring washer of a matched size is additionally arranged between the positioning nut 5 and the connecting plate 2.

[0031] The adjustable bottom plate 4 can control the transformation of the test mold shell 1 from having a bottom to not having a bottom, so as to be suitable for the forming requirements of sprayable concrete impermeable test pieces with different gravel sizes and different setting times, thereby preparing the impermeable test pieces meeting the impermeability test requirements and the test piece forming mechanism being consistent with the on-site construction of the sprayable concrete. ​

[0032] The inner wall of the test mold shell 1 is provided with two annular marks 6; the distance between the two annular marks 6 is the height of the shot concrete impermeability test piece. The purpose is to form a test piece cutting processing position mark, and to save the work of manually measuring the cutting position.

[0033] The annular mark 6 is an annular groove or an annular protrusion.

[0034] The connecting plate 2 can be integral or split: when the connecting plate 2 is integral, a plurality of positioning holes are uniformly arranged on the connecting plate 2; when the connecting plate 2 is split, a plurality of connecting plates 2 are uniformly fixed on the outer wall of the test mold shell 1, and each connecting plate 2 is provided with one positioning hole.

[0035] Preferably, the connecting plate 2 is integral, and the connecting plate 2 and the adjustable bottom plate 4 are both square, the four corners of the connecting plate 2 are provided with positioning holes, and the four corners of the adjustable bottom plate 4 are provided with connecting screws 3.

[0036] The adjustable bottom plate 4 is provided with an annular closed groove 7; the annular closed groove 7 matches the lower end opening of the test mold shell 1. After the adjustable bottom plate 4 is connected to the connecting plate 2 through the connecting screw 3, when the connecting plate 2 is not provided with the positioning nut 5 below, the lower end of the test mold shell 1 can be embedded in the annular closed groove, and the minimum gap between the adjustable bottom plate 4 and the test mold shell 1 can be adjusted to 0.

[0037] The connecting screw 3 is a full-thread screw; and the positioning nut 5 located on the upper side of the connecting plate 2 is a hand-tightening nut.

[0038] The adjustable shot concrete impermeability test piece forming device is made of anti-rust metal material.

[0039] Finally, it should be noted that: the above embodiments are only used to illustrate the technical solutions of the present application, and not to limit them; although the present application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that: it can still modify the technical solutions recorded in the foregoing embodiments, or make equivalent replacement for part or all of the technical features; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the scope of the technical solutions of the embodiments of the present application.

Claims

1. An adjustable spray concrete permeability test specimen forming device, characterized by, The utility model relates to a test mould shell (1), connecting plate (2), connecting screw rod (3), adjustable bottom plate (4) and locating nut (5) are included; The test mould shell (1) is hollow circular truncated cone structure, and the diameter gradually reduces from top to bottom; The connecting plate (2) is fixed on the outer wall of test mould shell (1), and the connecting plate (2) is provided with locating hole, and a plurality of locating holes are evenly arranged around the test mould shell (1); The bottom end of connecting screw rod (3) is fixed on adjustable bottom plate (4), and a plurality of connecting screw rods (3) pass through the corresponding locating holes, and two groups of locating nuts (5) are installed on each connecting screw rod (3), and the two groups of locating nuts (5) are located on the upper and lower sides of connecting plate (2).

2. The adjustable spray concrete permeability test piece forming device according to claim 1, characterized by, Two annular marks (6) are arranged on the inner wall of test mould shell (1); The distance between the two annular marks (6) is the height of the shotcrete impermeability test piece.

3. The adjustable spray concrete permeability test piece forming device according to claim 2, characterized by The annular mark (6) is annular groove or annular protrusion.

4. The adjustable spray concrete permeability test piece forming device according to claim 1, characterized by, The connecting plate (2) is integral type, and a plurality of locating holes are evenly arranged on the connecting plate (2).

5. The adjustable spray concrete permeability test piece forming device according to claim 4, characterized by The connecting plate (2) and adjustable bottom plate (4) are square, the locating hole is arranged on the four corners of connecting plate (2), and the connecting screw rod (3) is installed on the four corners of adjustable bottom plate (4).

6. The adjustable spray concrete permeability test piece forming device according to claim 1, characterized by The connecting plate (2) is split type, a plurality of connecting plates (2) are fixed on the outer wall of test mould shell (1), and one locating hole is arranged on each connecting plate (2).

7. The adjustable spray concrete permeability test piece forming device according to claim 1, characterized by The adjustable bottom plate (4) is provided with annular closed groove (7); The annular closed groove (7) is matched with the lower end opening of test mould shell (1).

8. The adjustable spray concrete permeability test piece forming device according to claim 1, characterized by The connecting screw rod (3) is full wire screw rod; The locating nut (5) on the upper side of connecting plate (2) is hand screw nut.

9. The adjustable spray concrete permeability test piece forming device according to claim 1, characterized by, Made of anti-rust metal material.

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