CN205981940U - Existing field test device of side slope soil body shear strength - Google Patents

Abstract

The utility model discloses an on-site testing device for the shear strength of slope soil, which comprises a cuboid frame. A cuboid soil frame is arranged in the frame of the cuboid frame. The cuboid soil frame consists of a thin steel plate A, a thin steel plate B and Two thin steel side plates form a rectangular frame structure, the thin steel plate A and the thin steel plate B are parallel to each other, and the two thin steel side plates are parallel to each other; the inner wall of the rectangular parallelepiped frame and the outer wall of the thin steel plate A are closely connected with a jack, The jack is located on the upper part of the rectangular parallelepiped frame, and the jack is located on the upper part of the rectangular parallelepiped soil frame; a fixed rod is arranged on the inner wall of the rectangular parallelepiped frame, and a dynamometer is installed on the fixed rod. The end of the rod is fixedly connected with the outer wall of the thin steel plate B; the upper part of the cuboid frame is provided with a scale. The utility model can realize the purpose of on-site real-time testing of the shear strength of different types of slope soil, and has the advantages of simple structure and low processing cost.

Description

A field test device for shear strength of slope soil

technical field

The utility model relates to the technical field of geotechnical field tests, in particular to a field test device for the shear strength of slope soil.

Background technique

Shear strength is the ability of soil to resist external loads, the basic index for evaluating slope stability, and the key content of slope stability evaluation and prediction. The complexity and location of geological processes in the process of slope soil formation Due to the particularity of the stress state, the structural characteristics and physical and mechanical properties of the slope soil are quite different from those of other parts of the road engineering, showing significant discreteness and variability. How to conduct accurate field analysis of the slope soil The shear strength test is a difficult problem in the study of slope stability.

The existing slope soil shear strength test device is mainly an indoor direct shear instrument, which can only be sampled and transported back to the laboratory for testing, which cannot truly reflect the shear strength of the slope soil on site; the test method is also relatively backward, and the efficiency Low, which affects its use in geotechnical tests.

Utility model content

The purpose of the utility model is to overcome the backwardness of the existing on-site shear strength testing device of the slope, and provide a field test device for the shear strength of the slope soil, which can quickly and efficiently perform on-site testing of the shear strength of the slope soil Experiment and measurement are accurate in real time, thus improving the level of scientific research.

The purpose of this utility model is achieved through the following technical solutions:

An on-site testing device for shear strength of slope soil, comprising a rectangular parallelepiped frame, a rectangular parallelepiped soil frame is provided within the frame of the rectangular parallelepiped frame, the rectangular parallelepiped soil frame is used to cooperate with placing a rectangular parallelepiped soil, and the rectangular parallelepiped soil frame A cuboid frame structure is composed of a thin steel plate A, a thin steel plate B and two thin steel side plates. The thin steel plate A and the thin steel plate B are parallel to each other, and the two thin steel side plates are parallel to each other. There is a cuboid inside the cuboid soil frame Cavity; jacks are installed closely between the inner wall of the rectangular parallelepiped frame and the outer wall of the thin steel plate A, the jack is located on the top of the rectangular parallelepiped frame, and the jack is located on the upper part of the rectangular parallelepiped soil frame; the inner wall of the rectangular parallelepiped frame is provided with A fixed rod, on which a dynamometer is installed, the dynamometer has a dowel, and the end of the dowel of the dynamometer is fixedly connected to the outer wall of the thin steel plate B; Scale for volume shear travel distance.

In order to better realize the on-site testing device for the shear strength of the slope soil, the thin steel plate A of the cuboid soil frame is provided with a slot, and the bottom of the jack is fitted in the slot.

Preferably, a support rod is provided between the outer wall of the thin steel side plate of the rectangular parallelepiped soil frame and the inner wall of the rectangular parallelepiped frame.

Preferably, the scale is detachably fixedly connected to the cuboid frame by screws.

Preferably, the clamping groove is arranged at the center of the thin steel plate A of the cuboid soil frame.

Compared with the prior art, the utility model has the following advantages and beneficial effects:

(1) The utility model can realize the purpose of on-site real-time testing of the shear strength of different soil properties and different types of slope soil, and has the advantages of simple structure and low processing cost, and is easy to popularize and apply in production and teaching.

(2) The utility model reduces the disturbance of the slope soil during the shearing process through the design of the thin steel plate with a large surface area, and improves the accuracy of the test; and a slot is set at the center of the thin steel plate A to ensure the The stability of the device also improves the accuracy of the test.

(3) The utility model improves the efficiency of the test, saves labor costs, and has important practical and scientific research significance for the field test of the shear strength.

Description of drawings

Fig. 1 is the top view of the utility model;

Fig. 2 is a side view of the utility model.

Wherein, the names corresponding to the reference signs in the accompanying drawings are:

1-cuboid frame, 2-card slot, 3-thin steel plate A, 4-jack, 5-screw, 6-scale, 7-support rod, 8-dowel rod, 9-fixed rod, 10-dynamometer , 11-cuboid soil, 12-thin steel plate B.

detailed description

Below in conjunction with embodiment the utility model is described in further detail:

Example

As shown in Figures 1 to 2, a field test device for the shear strength of slope soil includes a cuboid frame 1. The cuboid frame 1 of this embodiment is 113.5 cm long, 80 cm wide, and 60 cm high. The cuboid frame 1 It is welded by steel plates with high strength and can withstand certain loads. A cuboid soil frame is arranged in the frame of the cuboid frame 1, and the cuboid soil frame is used to coordinately place the cuboid soil body 11. The cuboid soil frame consists of a thin steel plate A3, a thin steel plate B12 and two thin steel side plates. Rectangular frame structure, thin steel plate A3 and thin steel plate B12 are parallel to each other front and back, two thin steel side plates are parallel to each other left and right, one thin steel plate A3, one thin steel plate B12, and two thin steel side plates are four steel plates of the same size, The length of the steel plate is 50cm, the height of the steel plate is 30cm, and the thickness of the steel plate is 0.4cm. The cuboid soil frame is used to fix the cuboid soil body 11; the inside of the cuboid soil frame has a cuboid cavity. A jack 4 is installed closely between the inner wall of the cuboid frame 1 and the outer side wall of the thin steel plate A3. The preferred jack 4 of the utility model is a 20T vertical hydraulic jack, which can make the cuboid soil 11 move slowly, thereby improving the cuboid soil 11. form a shear. The jack 4 is positioned at the top of the cuboid frame 1, and the jack 4 is positioned at the top of the cuboid soil frame. The inwall of cuboid frame 1 is provided with fixed rod 9, and the length of fixed rod 9 is 6.9cm, and intensity is bigger, and fixed rod 9 is used for the inboard of dynamometer 10 being fixed on cuboid frame 1; The dynamometer 10, the dynamometer 10 has a dowel 8, the stiffness of the dowel 8 is relatively large, and is used to transmit the shear force of the cuboid soil 11 to the dynamometer 10; the dowel 8 of the dynamometer 10 The end is fixedly connected with the outer wall of the thin steel plate B12. The upper part of the cuboid frame 1 is provided with a scale 6 for measuring the shear distance of the cuboid soil 11. The scale 6 is used to read the shear displacement of the cuboid soil 11, which can be accurate to millimeters (mm).

As shown in Figure 1, the thin steel plate A3 of the cuboid soil frame is provided with a slot 2, and the bottom of the jack 4 is fitted in the slot 2, and the slot 2 is used to fix the jack 4 so that the jack 4 is just placed on the cuboid soil The central position of the body 11 ensures the stability of the on-site test device for the shear strength of the shear slope soil.

A support rod 7 is provided between the thin steel side plate outer wall of the cuboid soil frame and the inner wall of the cuboid frame 1, as shown in Figure 1, the support rod 7 includes a left support rod and a right support rod, and the left and right support rods The length is 14.8cm, and the left support rod and the right support rod are used to fix the thin steel side plates on the left and right sides of the cuboid soil body 11 .

The preferred scale 6 of the utility model and the cuboid frame 1 are fixedly connected by screws 5 detachably. The preferred draw-in groove 2 of the utility model is arranged at the central position of the thin steel plate A3 of the cuboid soil body frame.

The on-site testing device for the shear strength of slope soil can realize the purpose of on-site real-time testing of the shear strength of different soil types and types of slope soil, and has the advantages of simple structure and low processing cost, and is easy to popularize and apply in production and teaching .

A method for on-site testing of the shear strength of slope soil is characterized in that it includes an on-site testing device for the shear strength of slope soil, and the test method is as follows:

A, first place the cuboid frame 1 on the slope surface, remove the clods or sundries on the slope surface, then leave the reference mark, and make the cuboid frame 1 central position leave a cuboid soil 11, the cuboid soil 11 The upper surface is square, and the periphery of the cuboid soil body 11 inside the cuboid frame 1 is hollowed out and leveled;

B, thin steel plate A3, thin steel plate B12 and two thin steel side plates are installed outside the cuboid soil body 11 to form a cuboid soil body frame, so that the cuboid soil body 11 is closely placed in the cuboid soil body frame, and then in the cuboid soil body frame A support rod 7 is installed between the outer side wall of the thin steel side plate and the inner wall of the cuboid frame 1. The support rod 7 is used to support and fix on both sides of the cuboid soil body 11. A slot 2 is left in the center of the thin steel plate A3, and the bottom of the jack 4 is matched with the It is clamped and installed in the card slot 2, and the top of the jack 4 is held against the inner wall of the cuboid frame 1; the scale 6 is fixed to the side of the cuboid frame 1 through several screws 5, and the scale 6 can be used to measure the cuboid soil correspondingly. body 11 under the shear force of the jack 4; the dynamometer 10 is fixed on the inside of the cuboid frame 1 through the fixed rod 9, so that the jack 4 and the dynamometer 10 are located at the center of the upper half of the cuboid soil body 11 and Fix, then zero the reading of the dynamometer 10;

C. Start the shear test of the cuboid soil body 11, force the upper half of the cuboid soil body 11 by 4 jacks and carry out slow shearing movement, keep the shearing speed at a constant speed, observe the scale 6 at the same time, after the time interval T, observe The readings of the dynamometer 10 are recorded until the peak shear force occurs, and then continue to shear until the shear force read by the dynamometer 10 remains constant, and the shear force read by the dynamometer 10 remains constant. The value is the shear balance value, and the scale change value of scale 6 is recorded;

D, convert the shear strength by the shear peak value, shear balance value and scale change value read by the dynamometer 10. After the test is completed, clean up the slope soil shear strength on-site testing device to ensure the slope soil resistance There is no residual soil sample on the shear strength field test device for the next test.

The above-mentioned implementation mode is only a preferred embodiment of the utility model, and is not used to limit the implementation and scope of rights of the utility model. All equivalent changes and approximate replacements made according to the content described in the patent protection scope of the utility model , all should fall within the protection scope of the present utility model.

Claims (5)

1. A field test device for shear strength of slope soil, characterized in that: it comprises a cuboid frame (1), and a cuboid soil frame is provided in the frame of the cuboid frame (1), and the cuboid soil frame is used for Place the rectangular parallelepiped soil (11), the rectangular parallelepiped soil frame consists of a thin steel plate A (3), a thin steel plate B (12) and two thin steel side plates to form a rectangular parallelepiped frame structure, the thin steel plate A (3 ) and the thin steel plate B (12) are parallel to each other, the two thin steel side plates are parallel to each other, and there is a cuboid cavity inside the cuboid soil frame; between the inner wall of the cuboid frame (1) and the outer wall of the thin steel plate A (3) A jack (4) is installed in close correspondence, the jack (4) is located on the upper part of the rectangular parallelepiped frame (1), and the jack (4) is located on the upper part of the rectangular parallelepiped soil frame; the inner wall of the rectangular parallelepiped frame (1) is provided with a fixing rod (9), a dynamometer (10) is installed on the fixed rod (9), the dynamometer (10) has a dowel rod (8), and the end of the dowel rod (8) of the dynamometer (10) is connected to The outer wall of the thin steel plate B (12) is fixedly connected; the upper part of the cuboid frame (1) is provided with a scale (6) for measuring the shear movement distance of the cuboid soil (11). 2. The on-site testing device for shear strength of slope soil according to claim 1, characterized in that: the thin steel plate A (3) of the cuboid soil frame is provided with a slot (2), and the jack ( The bottom of 4) fits in the slot (2). 3. The on-site testing device for shear strength of slope soil according to claim 1, characterized in that: the outer wall of the thin steel side plate of the cuboid soil frame and the inner wall of the cuboid frame (1) are provided with Support rod (7). 4. A field test device for shear strength of slope soil according to claim 1, characterized in that: the scale (6) is detachably fixed to the cuboid frame (1) by screws (5) connect. 5. The on-site testing device for shear strength of slope soil according to claim 2, characterized in that: the clamping groove (2) is set at the center of the thin steel plate A (3) of the cuboid soil frame.