CN211553624U - Boulder retaining wall shear strength oblique cutting cylinder method in-situ detection device - Google Patents
Boulder retaining wall shear strength oblique cutting cylinder method in-situ detection device Download PDFInfo
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- CN211553624U CN211553624U CN202020140162.6U CN202020140162U CN211553624U CN 211553624 U CN211553624 U CN 211553624U CN 202020140162 U CN202020140162 U CN 202020140162U CN 211553624 U CN211553624 U CN 211553624U
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Abstract
A shear strength oblique cylinder method in-situ detection device for a barred rock retaining wall comprises an oblique cylinder sample containing a horizontal sheared joint, which is positioned in the barred rock retaining wall, and a rubber gasket, a metal cushion block, an oil jack, a spherical support and a counterforce device are sequentially arranged on the oblique cylinder sample; the oil pressure jack is connected with the pressure device through an oil pressure pipe; the bottom of the counterforce device is embedded in the stone and covers the rubber gasket, the metal cushion block, the hydraulic jack and the spherical support under the stone. The utility model discloses a detection device applys horizontal thrust on oblique cylinder sample, is cut along the level and builds the seam and shear the destruction until oblique cylinder sample, according to shearing the area, calculates shear strength, and the practicality is strong, detects the accuracy, reasonable in design.
Description
Technical Field
The utility model relates to a boulder barricade shear strength oblique cylinder method normal position detection device.
Background
The gravity retaining wall is widely applied in China. At present, most of the specifications are mainly used for carrying out anti-slip stability checking calculation, anti-overturning stability checking calculation and foundation bearing capacity checking calculation on gravity retaining walls. Some specifications relate to the checking calculation of the section strength of the retaining wall body, namely the checking calculation of the eccentric compression bearing capacity and the checking calculation of the bending bearing capacity, but the checking calculation of the section shear strength of the retaining wall body is rarely mentioned, and usually, a plurality of control sections are selected for checking calculation. In the actual engineering, a plurality of retaining walls, particularly the barred rock retaining walls, have the defects that the wall body is easy to shear and damage along the masonry joint due to the low mortar strength or poor construction quality of masonry barred rocks. Therefore, in-situ detection of shear strength of the stone bank retaining wall is a very important task.
At present, no method standard for in-situ detection of the shear strength of the stone retaining wall exists, so that an innovative design is required.
SUMMERY OF THE UTILITY MODEL
The utility model provides a strong, detect accurate, reasonable in design's barred rock barricade shear strength chamfer cylinder method normal position detection device of practicality, the device can solve the problem that does not have normal position detection barred rock barricade shear strength method standard at present yet.
The utility model adopts the technical proposal that: a shear strength oblique cylinder method in-situ detection device for a barred rock retaining wall comprises an oblique cylinder sample containing a horizontal sheared joint, which is positioned in the barred rock retaining wall, and a rubber gasket, a metal cushion block, an oil jack, a spherical support and a counterforce device are sequentially arranged on the oblique cylinder sample; the oil pressure jack is connected with the pressure device through an oil pressure pipe; the bottom of the counterforce device is embedded in the stone and covers the rubber gasket, the metal cushion block, the hydraulic jack and the spherical support under the stone. The utility model discloses a detection device applys horizontal thrust on oblique cylinder sample, is cut along the level and builds the seam shearing and destroy until oblique cylinder sample, according to shearing area, calculates shear strength.
Furthermore, the level is cut the joint, for cement mortar, and the top surface is oval and just perpendicular and have a nodical with barred rock retaining wall surface, and oval major axis intersects perpendicularly with barred rock retaining wall surface.
Further, the bottom surface of the oblique cutting cylinder sample is connected with the barred rock retaining wall, the oblique cutting surface is the barred rock retaining wall surface and is elliptical, an intersection point is arranged between the oblique cutting surface and the horizontal sheared top surface, the long axis of the ellipse is perpendicularly intersected with the horizontal sheared top surface, and the included angle between the longitudinal axis of the cylinder and the oblique cutting surface and the horizontal sheared top surface is 45 degrees.
Further, the rubber gasket is a longitudinal cutting elliptic cylinder, the thickness of the rubber gasket is 3mm-5mm, the longitudinal cutting surface of the rubber gasket is parallel to the minor axis of the oblique cutting surface of the oblique cutting cylinder sample, the elliptic arc of the bottom surface of the rubber gasket is in coincident contact with the elliptic arc of the oblique cutting surface of the oblique cutting cylinder sample, a crossing point is formed between the elliptic arc of the bottom surface of the rubber gasket and the elliptic arc of the oblique cutting surface of the oblique cutting.
Further, the metal cushion block comprises a longitudinal cutting elliptic cylinder at the lower part and a rectangular body at the upper part; the thickness of the longitudinal cut elliptic cylinder is 3mm-5mm, the bottom surface of the longitudinal cut elliptic cylinder is coincided and contacted with the top surface of the rubber gasket, and the top surface of the longitudinal cut elliptic cylinder is fixedly connected with the bottom surface of the rectangular body; the thickness of the rectangular body is 10mm-20mm, the top surface of the rectangular body is in contact with the bottom surface of the hydraulic jack and is larger than the bottom surface of the hydraulic jack, the side surface of the rectangular body is perpendicular to the top surface of the horizontal sheared seam, and the central connecting line of the top surface and the bottom surface is in the same straight line with the elliptic major axis of the top surface of the horizontal sheared seam.
Furthermore, the bottom surface of the oil jack is in contact with the metal cushion block, the top surface of the oil jack is in contact with the metal counter-force beam through the spherical support, and the longitudinal axis of the oil jack is in the same straight line with the long elliptic axis of the horizontal sheared joint top surface.
Furthermore, the pressure device is an oil pressure pump, and a digital pressure gauge with a peak value storage function is installed on the pressure device.
Further, the reaction device comprises a metal reaction beam, two reaction chemical screw rods and two reaction nuts, wherein the two reaction chemical screw rods are symmetrically arranged on two sides of the metal reaction beam; the metal counter-force beam is a rectangular plate, two ends of the metal counter-force beam are respectively drilled with a connecting screw hole for connecting a counter-force chemical screw rod, and the bottom surface of the metal counter-force beam is in contact with the oil jack through a spherical support; the bottom of the counter-force chemical screw is embedded in an anchoring hole in the stone through chemical anchoring glue, and the top of the counter-force chemical screw penetrates through the connecting screw hole to be fastened with the counter-force nut.
The utility model has the advantages that: (1) in the detection process, horizontal thrust is applied to the beveled cylinder sample through the detection device until the beveled cylinder sample is sheared and damaged by the horizontal sheared bond, and the shearing strength is calculated according to the shearing area. The practicability is strong, and the detection is accurate; (2) the detection device is reasonable in design, and instruments and parts are purchased, processed, assembled and carried conveniently, so that the popularization value is greatly improved; (3) the method solves the problem that no standard method for detecting the shear strength of the barred rock retaining wall in situ is available at present, and provides a detection method with both reliability and practicability for construction quality control and repair reinforcement design.
Drawings
Fig. 1 is a schematic view of the present invention in front view.
Fig. 2 is a schematic cross-sectional view of the present invention in use 1-1.
Fig. 3 is a schematic cross-sectional view of the present invention in use 2-2.
Fig. 4 is a schematic cross-sectional view of the present invention in use 3-3.
Fig. 5 is a schematic cross-sectional view of the present invention using 4-4.
Fig. 6 is a schematic front vertical surface view of the metal pad structure of the present invention.
Fig. 7 is a schematic bottom view of the metal pad structure of the present invention.
Fig. 8 is a schematic diagram of the chamfered cylinder specimen drilling of the present invention.
Detailed Description
The present invention will be further described with reference to the following specific embodiments, but the present invention is not limited to these specific embodiments. It will be recognized by those skilled in the art that the present invention encompasses all alternatives, modifications, and equivalents as may be included within the scope of the claims.
Referring to fig. 1-8, the shear strength chamfer cylinder method in-situ detection device for the barred rock retaining wall comprises a chamfer cylinder sample 17 which is positioned in the barred rock retaining wall 15 and contains a horizontal cut bond 6, and a rubber gasket 11, a metal cushion block 7, an oil jack 10, a spherical support 8 and a counterforce device 18 are sequentially arranged on the chamfer cylinder sample; the oil jack 10 is connected with a pressing device 13 through an oil pressure pipe 14; the bottom of the reaction force device 18 is embedded in the bar 5, and the rubber gasket 11, the metal cushion block 7, the hydraulic jack 10 and the spherical support 8 are covered under the reaction force device. The utility model discloses a detection device applys horizontal thrust on oblique cylinder sample 17, is cut 6 shear damages of building a seam until oblique cylinder sample 17 along the level, according to shearing the area, calculates shear strength.
The dimension of the stone 5 of the embodiment is 250mm multiplied by 750 mm.
In this embodiment, the horizontal cut joint 6 is made of cement mortar, the top surface is oval and perpendicular to the surface of the stone-like retaining wall 15, and there is an intersection point, the long axis of the oval is perpendicular to the surface of the stone-like retaining wall 15, the long axis of the oval is 200mm, and the short axis is 142 mm.
In this embodiment, the bottom surface of the beveled cylinder sample 17 is connected with the barred rock retaining wall 15, the beveled surface is the barred rock retaining wall 15 surface and is an ellipse and has a crossing point with the top surface of the horizontal sheared building seam 6, the major axis of the ellipse is vertically crossed with the top surface of the horizontal sheared building seam 6, the included angle between the longitudinal axis of the cylinder and the top surface of the beveled surface and the horizontal sheared building seam 6 is 45 degrees, the major axis of the ellipse is 200mm, and the minor axis is 142 mm.
In the embodiment, the rubber gasket 11 is a longitudinal cutting elliptic cylinder with the thickness of 4mm, the longitudinal section of the rubber gasket is parallel to the minor axis of the oblique cutting plane of the oblique cutting cylinder sample 17, the elliptic arc of the bottom surface of the rubber gasket is in coincident contact with the elliptic arc of the oblique cutting plane of the oblique cutting cylinder sample 17, a crossing point is arranged on the top surface of the horizontal shearing building seam 6, the vertical distance between the crossing point and the longitudinal section is 50mm, and the top surface of the rubber gasket is in.
The metal cushion block 7 of the embodiment comprises a longitudinal cutting elliptic cylinder at the lower part and a rectangular body at the upper part; the thickness of the longitudinally cut elliptic cylinder is 4mm, the bottom surface of the longitudinally cut elliptic cylinder is overlapped and contacted with the top surface of the rubber gasket 11, and the top surface of the longitudinally cut elliptic cylinder is fixedly connected with the bottom surface of the rectangular body; the cuboid thickness is 12mm, and the long height of top surface size is 200mm 100mm, and the top surface contacts with hydraulic jack 10 bottom surface, and the side is perpendicular with the level receives 6 top surfaces of cutting the joint, and top surface and bottom surface center line receive the same straight line of 6 top surface ellipse major axes of cutting the joint with the level.
In the embodiment, the bottom surface of the oil jack 10 is in contact with a metal cushion block, the diameter of the oil jack is 100mm, the top surface of the oil jack is in contact with a metal reaction beam 9 through a spherical support 8, and the longitudinal axis of the oil jack is in the same straight line with the elliptical long axis of the top surface of the horizontal sheared building joint 6.
In this embodiment, the pressing device 13 is a manual oil hydraulic pump, and a digital pressure gauge 12 having a peak saving function is installed.
The reaction force device 18 of the embodiment comprises a metal reaction beam 9, two reaction force chemical screws 16 and two reaction force nuts 4 which are symmetrically arranged on two sides of the metal reaction beam 9; the metal reaction beam 9 is a rectangular plate, the size length multiplied by the width multiplied by the thickness is 760mm multiplied by 100mm multiplied by 25mm, two ends are respectively drilled with a connecting screw hole 3 which is connected with a reaction chemical screw 16 and has the aperture of 22mm, the bottom surface is contacted with an oil jack 10 through a spherical support 8, the reaction chemical screw 16 has the specification of M18, and the length is 450 mm; the bottom of the reaction chemical screw 16 is embedded in an anchoring hole 2 in the stone 5 through a chemical anchoring adhesive 1, the inner diameter of the anchoring hole 2 is 22mm, the depth is 160mm, and the top of the reaction chemical screw passes through the connecting screw hole 3 and is fastened with the reaction nut 4.
The detection steps of this embodiment are as follows: (1) fixing an angle-adjustable core-drilling machine 20 on the surface of the barred rock retaining wall 15, installing a diamond thin-wall hollow drill bit 19 with the inner diameter of 142mm and the length of at least 420mm, adjusting the angle and the distance of the angle-adjustable core-drilling machine 20 to ensure that the included angle between the diamond thin-wall hollow drill bit 19 and the surface of the barred rock retaining wall 15 is 45 degrees, and the distance between the upper end of the diamond thin-wall hollow drill bit 19 and the top surface of the horizontal sheared joint 6 is 200 mm; (2) starting the core drilling machine 20 with the adjustable angle, and lowering the diamond thin-wall hollow drill bit 19 by at least 290mm to form a beveled cylinder sample 17; (3) taking the intersection point of the long elliptic axis of the oblique cutting plane of the oblique cutting cylinder sample 17 and the top surface of the horizontal sheared building seam 6 as a middle point, symmetrically and horizontally drilling 2 anchoring holes 2 in the upper end and the lower end of the strip stone 5 on the surface of the strip stone retaining wall 15 by using an electric hammer, pouring quick-drying chemical anchoring adhesive 1, rotatably inserting 2 counter-force chemical screws 16 into the anchoring holes 2, fixing, and waiting for the chemical anchoring adhesive 1 to be solidified; (4) the reaction chemical screw 16 passes through the connecting screw holes 3 at the two ends of the metal reaction beam 9, and the reaction nut 4 is screwed into the reaction chemical screw 16; (5) the hydraulic jack 10 is connected with a manual hydraulic pump 13 through a hydraulic pipe 14, and a rubber gasket 11, a metal cushion block 7, the hydraulic jack 10 and a spherical support 8 are sequentially placed on the oblique cutting surface of the oblique cutting cylinder sample 17, so that the longitudinal axis of the hydraulic jack 10 and the long axis of the top surface ellipse of the horizontal sheared building seam 6 are in the same straight line; (6) starting the manual oil hydraulic pump 13 to load, applying horizontal thrust on the oblique cutting cylinder sample 17 until the oblique cutting cylinder sample 17 is sheared and damaged by the shear bond 6 along the horizontal direction, reading the maximum load, and calculating the shear strength according to the shear area (the shear area is obtained according to the major axis 200mm and the minor axis 142mm of the ellipse).
Claims (8)
1. The utility model provides a boulder barricade shear strength oblique cut cylinder method normal position detection device which characterized in that: the test piece comprises a beveled cylindrical test piece which is positioned in a stone retaining wall and contains a horizontal sheared and built joint, and a rubber gasket, a metal cushion block, an oil jack, a spherical support and a counterforce device are sequentially arranged on the beveled cylindrical test piece; the oil pressure jack is connected with the pressure device through an oil pressure pipe; the bottom of the counterforce device is embedded in the stone and covers the rubber gasket, the metal cushion block, the hydraulic jack and the spherical support under the stone.
2. The shear strength chamfer cylinder method in-situ detection device for the stone bank retaining wall according to claim 1, wherein: the level is cut and is built the seam, for cement mortar, and the top surface is oval and just has an nodical with barred rock retaining wall surface vertical, and oval major axis intersects perpendicularly with barred rock retaining wall surface.
3. The shear strength chamfer cylinder method in-situ detection device for the stone bank retaining wall according to claim 1, wherein: the bottom surface of the beveling cylinder sample is connected with the barred rock retaining wall, the beveling surface is the barred rock retaining wall surface and is elliptical, the beveling surface and the horizontal sheared top surface have a point of intersection, the elliptical long axis is perpendicularly intersected with the horizontal sheared top surface, and the included angle between the longitudinal axis of the cylinder and the beveling surface and the horizontal sheared top surface is 45 degrees.
4. The shear strength chamfer cylinder method in-situ detection device for the stone bank retaining wall according to claim 1, wherein: the rubber gasket is a longitudinal cutting elliptic cylinder with the thickness of 3mm-5mm, the longitudinal section of the rubber gasket is parallel to the minor axis of the oblique cutting plane of the oblique cutting cylinder sample, the elliptic arc of the bottom surface of the rubber gasket is in coincident contact with the elliptic arc of the oblique cutting plane of the oblique cutting cylinder sample, a crossing point is arranged between the elliptic arc of the bottom surface of the rubber gasket and the elliptic arc of the oblique cutting plane of the oblique cutting cylinder sample and the.
5. The shear strength chamfer cylinder method in-situ detection device for the stone bank retaining wall according to claim 1, wherein: the metal cushion block comprises a longitudinal cutting elliptic cylinder at the lower part and a rectangular body at the upper part; the thickness of the longitudinal cutting elliptic cylinder is 3mm-5mm, the bottom surface of the longitudinal cutting elliptic cylinder is coincided and contacted with the top surface of the rubber gasket, and the top surface of the longitudinal cutting elliptic cylinder is fixedly connected with the bottom surface of the rectangular body; the thickness of the rectangular body is 10mm-20mm, the top surface of the rectangular body is in contact with the bottom surface of the hydraulic jack and is larger than the bottom surface of the hydraulic jack, the side surface of the rectangular body is perpendicular to the top surface of the horizontal sheared seam, and the central connecting line of the top surface and the bottom surface is in the same straight line with the elliptic major axis of the top surface of the horizontal sheared seam.
6. The shear strength chamfer cylinder method in-situ detection device for the stone bank retaining wall according to claim 1, wherein: the bottom surface of the oil jack is in contact with the metal cushion block, the top surface of the oil jack is in contact with the metal counterforce cross beam through the spherical support, and the longitudinal axis of the oil jack is in the same straight line with the elliptic major axis of the horizontal sheared joint top surface.
7. The shear strength chamfer cylinder method in-situ detection device for the stone bank retaining wall according to claim 1, wherein: the pressure applying device is an oil pressure pump, and a digital pressure gauge with a peak value storage function is installed on the pressure applying device.
8. The shear strength chamfer cylinder method in-situ detection device for the stone bank retaining wall according to claim 1, wherein: the reaction device comprises a metal reaction beam, two reaction chemical screw rods and two reaction nuts, wherein the two reaction chemical screw rods are symmetrically arranged on two sides of the metal reaction beam; the metal counter-force beam is a rectangular plate, two ends of the metal counter-force beam are respectively drilled with a connecting screw hole for connecting a counter-force chemical screw rod, and the bottom surface of the metal counter-force beam is in contact with the oil jack through a spherical support; the bottom of the counter-force chemical screw is embedded in an anchoring hole in the stone through chemical anchoring glue, and the top of the counter-force chemical screw penetrates through the connecting screw hole to be fastened with the counter-force nut.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020140162.6U CN211553624U (en) | 2020-01-21 | 2020-01-21 | Boulder retaining wall shear strength oblique cutting cylinder method in-situ detection device |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202020140162.6U CN211553624U (en) | 2020-01-21 | 2020-01-21 | Boulder retaining wall shear strength oblique cutting cylinder method in-situ detection device |
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| CN211553624U true CN211553624U (en) | 2020-09-22 |
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| CN202020140162.6U Active CN211553624U (en) | 2020-01-21 | 2020-01-21 | Boulder retaining wall shear strength oblique cutting cylinder method in-situ detection device |
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