Basic friction angle field testing device suitable for rock mass structural surface in any shape

Abstract

The utility model relates to a basic friction angle field testing device suitable for rock mass structural surfaces in any shapes, which comprises a sample loading rack, and the sample loading rack comprises a hollow base and a regular round hole-shaped steel plate which is arranged on the hollow base and can turn over relative to the hollow base. A plurality of round holes are formed in the regular round-hole-shaped steel plate, detachable plug pin structures are arranged in the round holes, and a locking space formed by the plug pin structures is used for limiting a sample lower disc in any shape. The rock mass structural plane basic friction angle testing device is reasonable in design, simple in structure and convenient to use, solves the problems that an existing rock mass structural plane basic friction angle testing device is only suitable for rock mass samples with specific shapes and sizes, the samples are time-consuming and difficult to machine, and rock mass structural planes with any shapes cannot be rapidly tested, and meanwhile can flexibly adjust the position of the limiting baffle to achieve rapid testing. Therefore, the sliding termination distance of the sample upper disc is adjusted, and flexibility is high.

Description

TECHNICAL FIELD

[0001] The utility model relates to a basic friction angle field testing device suitable for arbitrary shape rock mass structure surface. BACKGROUND

[0002] Rock mass structure surface is a key factor affecting rock mass mechanical characteristics and stability, and rock mass sliding instability disasters occurring in tunnel and underground engineering, mining engineering or slope engineering are usually caused by insufficient shear strength of rock mass structure surface. Therefore, scientifically and reasonably determining the shear strength of rock mass structure surface has important theoretical significance and engineering application value. Previous studies show that for non-filling type rock mass structure surface, the shear strength is mainly composed of two parts of the basic friction angle provided by the smooth straight rock surface and the climbing angle or dilatancy angle provided by the rough undulating rock surface, so the basic friction angle of rock mass structure surface is crucial and is an indispensable important parameter in the stability evaluation of engineering rock mass.

[0003] At present, the basic friction angle of rock mass structure surface is mainly determined by test methods such as inclination test, direct shear test, push-pull test, triaxial test and rebound test. Among them, the inclination test is the main test method for determining the basic friction angle of rock mass structure surface at present, and is widely used due to its simple principle, easy operation, and obvious economic and convenient advantages. In order to more accurately carry out the inclination test, some rock mass structure surface basic friction angle inclination test instruments are developed, which are basically composed of sample loading rack, inclination lifting device, angle measuring device and other components. However, the existing inclination test instrument still has many problems, specifically as follows: (1) the test instrument has strict requirements on the specifications of rock mass samples, and the samples need to be processed into the shape and size specified by the inclination test instrument (the shape is mainly square, and the size is mainly 10cmx10cmx4cm or 5cmx5cmx2cm, etc.), which is difficult to apply to rock mass structure surfaces of any shape; (2) the test instrument lacks reasonable setting of the sliding termination distance of the upper disc rock sample after lifting, and can only be a certain fixed sliding termination distance, which easily causes insufficient measurement accuracy of the basic friction angle of rock mass, and cannot flexibly adjust the sliding termination distance according to the size of the rock mass structure surface of any shape. UTILITY MODEL CONTENTS

[0004] The utility model improves the above-mentioned problems, that is, the technical problem to be solved by the utility model is to provide a basic friction angle field testing device suitable for arbitrary shape rock mass structure surface, solve the problem that the existing rock mass structure surface basic friction angle testing device is only suitable for rock mass samples of specific shape and size, the sample processing is time-consuming and difficult, and the rock mass structure surface of any shape cannot be quickly tested, and solve the problem that the existing rock mass structure surface basic friction angle testing device only sets a certain fixed sample upper disc sliding termination distance, and the sample upper disc sliding termination distance cannot be flexibly adjusted according to the size of the rock mass.

[0005] The utility model discloses a structure is such, it includes sample loading rack, the sample loading rack includes the hollow base and sets up on the hollow base and the regular round hole shape steel sheet that can turn over relative to the hollow base, the regular round hole shape steel sheet is distributed with a plurality of round holes, the round hole is provided with the detachable bolt structure, and the lock space formed by a plurality of bolt structures is used to limit the sample lower disc of arbitrary shape.

[0006] Further, the regular round hole shape steel plate surface is provided with the limit baffle for sample upper disc sliding termination, the limit baffle can be moved along the length direction of regular round hole shape steel plate and be limited in the position of regular round hole shape steel plate.

[0007] Further, the limit baffle below is provided with the chute, and the front and rear inner walls of the chute are provided with baffle pulleys, the front and rear of the regular round hole shape steel plate are provided with baffle sliding rails for cooperating with the baffle pulleys, and the baffle pulleys can slide along the length direction of the baffle sliding rails.

[0008] Further, one side of the hollow base is hinged with one side of the regular round hole shape steel plate, and the regular round hole shape steel plate below is provided with a sample tilting lifting device for lifting and tilting the regular round hole shape steel plate along the hinge point.

[0009] Further, the sample tilting lifting device includes a hydraulic jack, the telescopic end of the hydraulic jack is provided with a lifting pulley, the bottom of the regular round hole shape steel plate is provided with a semicylindrical sliding rail, and the lifting pulley and the semicylindrical sliding rail are slidingly connected.

[0010] Further, the bolt structure includes a bolt and a bolt nut.

[0011] Further, the regular round hole shape steel plate is provided with an inclination angle high-precision electronic digital display instrument for measuring the inclination angle of the sample.

[0012] Further, the semicylindrical sliding rail is provided with a baffle at both ends.

[0013] Further, the baffle pulley is provided with a pulley locking device for locking or unlocking the rotation of the baffle pulley.

[0014] Further, the hydraulic jack output end is provided with a connecting shaft, the connecting shaft is provided with a fixed plate, the lifting pulley is arranged in the fixed plate and can rotate relative to the fixed plate, and the shaft body of the lifting pulley is rotationally connected with the shaft sleeve arranged on the fixed plate.

[0015] Compared with the prior art, the device has the following beneficial effects: simple structure, reasonable design, convenient use, the lock space is formed by the plurality of bolts and fixed nuts, the sample lower disc is fixed on the regular circular hole type steel plate around, the high-precision electronic digital display instrument is adjusted to zero value, the limiting baffle is adjusted by sliding, and the limiting baffle is fixed after the position is confirmed, the lifting pulley of the inclined lifting device is moved by slowly pressing the hydraulic jack at a uniform speed, the regular circular hole type steel plate is lifted at a uniform speed, the sample upper disc is stopped when sliding and touching the limiting baffle, and the reading of the high-precision electronic digital display instrument is the basic friction angle of the rock mass structure surface. The device can test the rock mass structure surface of any shape, can adjust the sliding termination distance of the sample upper disc to adapt to the rock mass structure surface of any shape, solves the problem that the existing rock mass structure surface basic friction angle testing device is only suitable for the rock sample of specific shape and size, the sample processing is time-consuming and difficult, and the device cannot test the rock mass structure surface of any shape, and the existing rock mass structure surface basic friction angle testing device only has a fixed sample upper disc sliding termination distance, and the sample upper disc sliding termination distance cannot be adjusted according to the size of the rock mass. BRIEF DESCRIPTION OF DRAWINGS

[0016] Figure 1 It is a structural schematic view of an embodiment of the utility model.

[0017] Figure 2 It is a plane schematic view of a regular circular hole type steel plate of an embodiment of the utility model.

[0018] Figure 3 It is a side schematic view of a sample loading rack of an embodiment of the utility model.

[0019] Figure 4 It is a schematic view of a semicircular column slide rail at the bottom of a regular circular hole type steel plate of an embodiment of the utility model.

[0020] Figure 5 It is a limiting baffle structure schematic view of an embodiment of the utility model.

[0021] Figure 6 It is a baffle slide rail schematic view of both sides of a regular circular hole type steel plate of an embodiment of the utility model.

[0022] Figure 7 It is a lifting pulley schematic view of an inclined lifting device of an embodiment of the utility model.

[0023] In the figure: 1-hollow base; 2-high precision electronic digital display instrument of inclination angle; 3-limiting baffle; 4-round hole; 5-latch; 6-regular round hole type steel plate; 7-semi-cylindrical slide rail; 8-hinge; 9-hydraulic jack; 10-rock sample; 11-lifting pulley; 12-baffle slide rail; 13-latch nut; 14-baffle; 15-baffle pulley; 16-bush; 17-connecting shaft; 18-fixing plate. DETAILED DESCRIPTION

[0024] The utility model will be further explained in detail below in combination with the drawings and specific embodiments.

[0025] Embodiment: refer to the drawings Figures 1-7 As shown in the figure, a basic friction angle field testing device suitable for arbitrary shape rock mass structure surface is provided, comprising a sample loading rack, the sample loading rack comprises a hollow base 1 and a regular round hole type steel plate 6 arranged on the hollow base and movable relative to the hollow base, a plurality of round holes 4 are arranged on the regular round hole type steel plate, and a detachable latch structure is arranged in the round hole, and the locking space formed by the plurality of latch structures is used to limit the lower disc of the sample of any shape.

[0026] In use, first, the sample loading rack is placed flat and stable, the rock sample 10 of any shape is placed on the regular round hole type steel plate, the maximum length of the rock mass structure surface along the sliding direction is measured, the locking space is formed by the plurality of latches and the fixing nuts thereof, and the lower disc of the sample is fixed on the regular round hole type steel plate; the high precision electronic digital display instrument of inclination angle is adjusted to zero value; the limiting baffle is adjusted by sliding to move to the sliding termination distance of the upper disc of the sample on the baffle slide rail (the sliding termination distance can be 10% of the maximum length of the rock mass structure surface along the sliding direction), and the limiting baffle is fixed after the position is confirmed; the lifting pulley of the inclined lifting device is moved by manually pressing the hydraulic jack at a slow and uniform speed, so that the regular round hole type steel plate is lifted at a slow and uniform speed; when the upper disc of the sample slides and touches the limiting baffle, the lifting is stopped, and the reading of the high precision electronic digital display instrument of inclination angle is the basic friction angle of the measured rock mass structure surface. The utility model not only can quickly test the rock mass structure surface of any shape, but also can flexibly adjust the sliding termination distance of the upper disc of the sample to adapt to the rock mass structure surface of any shape, solve the problem that the existing rock mass structure surface basic friction angle testing device is only suitable for the rock sample of specific shape and size, the sample processing is time-consuming and difficult, and the rock mass structure surface of any shape cannot be quickly tested, and the problem that the existing rock mass structure surface basic friction angle testing device only sets a certain fixed sliding termination distance of the upper disc of the sample, and the sliding termination distance of the upper disc of the sample cannot be flexibly adjusted according to the size of the rock mass.

[0027] In the embodiment of the utility model, the regular circular hole shaped steel plate surface is provided with a limiting baffle 3 for stopping sample disc sliding, the limiting baffle can move along the length direction of the regular circular hole shaped steel plate and be limited to a position of the regular circular hole shaped steel plate, and the limiting baffle can slide on the regular circular hole shaped steel plate to flexibly adjust sample disc sliding stop distance.

[0028] In the embodiment of the utility model, the limiting baffle lower portion is provided with a sliding groove, the sliding groove is matched with the regular circular hole shaped steel plate, the sliding groove front and back inner walls are provided with baffle pulleys 15, the regular circular hole shaped steel plate front and back portions are provided with baffle sliding rails 12 matched with the baffle pulleys, and the baffle pulleys can slide along the length direction of the baffle sliding rails.

[0029] In the embodiment of the utility model, one side of the hollow base and one side of the regular circular hole shaped steel plate are hinged through a hinge 8, and the regular circular hole shaped steel plate lower portion is provided with a sample tilting lifting device for lifting and tilting the regular circular hole shaped steel plate along the hinge point.

[0030] The sample tilting lifting device comprises a hydraulic jack 9, the hydraulic jack lower portion is installed on the hollow base, the hydraulic jack telescopic end is provided with a lifting pulley 11, the regular circular hole shaped steel plate bottom portion is provided with a semicylindrical sliding rail 12, and the lifting pulley is in sliding cooperation with the semicylindrical sliding rail.

[0031] In the embodiment of the utility model, the bolt structure comprises a bolt 5 and a bolt nut 13, the bolt is inserted into the circular hole of the regular circular hole shaped steel plate and is fixed through the bolt nut, the length of the bolt exposed from the regular circular hole shaped steel plate surface can be adjusted, when the rock sample is placed on the regular circular hole shaped steel plate, the sample lower disc can be fixed through the bolt around the sample to ensure the stability and safety of the sample lower disc in the tilting test process.

[0032] In the embodiment of the utility model, the regular circular hole shaped steel plate is provided with a tilting angle high-precision electronic digital display instrument 2 for measuring the sample tilting angle.

[0033] In the embodiment of the utility model, in order to prevent the lifting pulley from coming out of the semicylindrical sliding rail, the semicylindrical sliding rail two ends are provided with limiting baffle 14.

[0034] In the embodiment of the utility model, the baffle pulley is provided with a pulley locking device for locking or unlocking the baffle pulley rotation, the pulley locking device is prior art, can lock or unlock the baffle pulley, and will not be repeated here, or the pulley locking device can also adopt a bolt, and the bolt directly penetrates the pulley and the baffle sliding rail to realize the baffle pulley limiting.

[0035] In the embodiment of the utility model, the hydraulic jack output end is provided with a connecting shaft 17, the connecting shaft is provided with a fixed plate 18, the lifting pulley is arranged in the fixed plate and can rotate relative to the fixed plate, and the shaft body of the lifting pulley is rotationally connected with the shaft sleeve 16 arranged on the fixed plate.

[0036] In the embodiment of the utility model, the hollow base is hollow in the middle, and further comprises four steel beams.

[0037] Any technical solution disclosed in the utility model above, if not otherwise stated, if it discloses a numerical range, the disclosed numerical range is a preferred numerical range, and any person skilled in the art should understand that the preferred numerical range is only one of the many implementable values with more obvious technical effects or representative values. Since there are many values, it is impossible to enumerate them all, therefore, the utility model discloses only part of the values to illustrate the technical solutions of the utility model, and the enumerated values above should not constitute a limitation on the protection scope of the utility model.

[0038] If the words "first", "second" and the like are used herein to limit parts, those skilled in the art should know that "first", "second" are used only for the convenience of distinguishing the parts, and the words have no special meaning unless otherwise stated.

[0039] Meanwhile, if the utility model above discloses or involves mutually fixed and connected parts or structural members, unless otherwise stated, the fixed connection can be understood as: detachable fixed connection (for example, bolt or screw connection), and can also be understood as: non-detachable fixed connection (for example, riveting, welding), of course, the mutually fixed connection can also be replaced by an integral structure (for example, integrally formed by using casting process) (obviously, it cannot be replaced by integral forming process).

[0040] In addition, the terms used to represent the position relationship or shape in any technical solution disclosed in the utility model above include the approximate, similar or close state or shape unless otherwise stated.

[0041] Any part provided by the utility model can be assembled from multiple individual components, or can be an individual component manufactured by integral forming process.

[0042] It should be noted that the above examples are used to illustrate the technical solutions of the present application, but not to limit them; although the present application has been described in detail with reference to the preferred embodiments, those skilled in the art should understand that the specific embodiments of the present application can be modified or some technical features can be replaced by equivalent ones; without departing from the spirit of the technical solutions of the present application, they should be covered in the technical solution range claimed by the present application.

Claims

1. A device for in-situ testing of the basic friction angle of a structural plane of any shape of rock mass, characterized in that, The sample loading rack comprises a hollow base and a regular circular hole steel plate arranged on the hollow base and foldable relative to the hollow base, a plurality of circular holes are arranged on the regular circular hole steel plate, a detachable bolt structure is arranged in the circular hole, and a locking space formed by the plurality of bolt structures is used to limit the lower disc of the sample of any shape.

2. The device for in-situ testing of the basic friction angle of a structural plane of any shape of rock mass according to claim 1, characterized in that, A limiting baffle plate for stopping the sliding of the upper disc of the sample is arranged on the surface of the regular circular hole steel plate, the limiting baffle plate is movable along the length direction of the regular circular hole steel plate and is limited to a certain position of the regular circular hole steel plate.

3. The device for in-situ testing of the basic friction angle of a structural plane in a rock mass of arbitrary shape according to claim 2, characterized in that, A sliding groove is arranged below the limiting baffle plate, baffle pulleys are arranged on the front and rear inner walls of the sliding groove, baffle sliding rails are arranged on the front and rear of the regular circular hole steel plate to cooperate with the baffle pulleys, and the baffle pulleys are slidable along the length direction of the baffle sliding rails.

4. The device for in-situ testing of the basic friction angle of a structural plane in a rock mass of arbitrary shape according to claim 1, characterized in that, One side of the hollow base is hinged to one side of the regular circular hole steel plate, and a sample tilting lifting device is arranged below the regular circular hole steel plate to lift and tilt the regular circular hole steel plate along the hinge point.

5. The device for in-situ testing of the basic friction angle of a structural plane in a rock mass of arbitrary shape according to claim 4, characterized in that, The sample tilting lifting device comprises a hydraulic jack, a lifting pulley is arranged at the telescopic end of the hydraulic jack, a semicylindrical sliding rail is arranged at the bottom of the regular circular hole steel plate, and the lifting pulley is in sliding cooperation with the semicylindrical sliding rail.

6. The device for in-situ measurement of the basic friction angle of a structural plane in a rock mass of arbitrary shape according to claim 1, characterized in that, The bolt structure comprises a bolt and a bolt nut.

7. The device for in-situ testing of the basic friction angle of a structural plane in a rock mass of arbitrary shape according to claim 1, characterized in that, A high-precision electronic digital display instrument for measuring the tilting angle of the sample is installed on the regular circular hole steel plate.

8. The device for in-situ testing of the basic friction angle of a structural plane of any shape of rock mass according to claim 5, characterized in that, The semicylindrical sliding rail is provided with a baffle plate at both ends.

9. The device for in-situ testing of the basic friction angle of a structural plane in a rock mass of arbitrary shape according to claim 3, characterized in that, A pulley locking device is arranged on the baffle pulley to lock or unlock the rotation of the baffle pulley.

10. The device for in-situ testing of the basic friction angle of a structural plane in a rock mass of arbitrary shape according to claim 5, characterized in that, A connecting shaft is arranged above the output end of the hydraulic jack, a fixed plate is arranged above the connecting shaft, the lifting pulley is arranged in the fixed plate and is rotatable relative to the fixed plate, and the shaft body of the lifting pulley is in rotary connection with a shaft sleeve arranged on the fixed plate.

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