CN210774467U - Stress testing matching device for three-dimensional soil pressure cell - Google Patents

Abstract

The utility model discloses a stress test matching device for a three-dimensional soil pressure cell, which comprises a control rod, a connecting rod and a three-dimensional soil pressure cell base fixing gripper, wherein the lower end of the control rod is in threaded connection with the upper end of the connecting rod, and the lower end of the connecting rod is in threaded connection with the fixing gripper; the control rod is formed by an internal support rod and an external sliding rod, a control device is arranged in the control rod, the connecting rod comprises a connecting inner rod and a connecting outer rod, and leveling tubes are respectively arranged on the outer walls of the sliding rod and the connecting outer rod along the rod vertical direction; the fixed gripper comprises a sliding ring, a fixed base, a connecting arm and a moving arm which are arranged up and down, wherein the sliding ring and the fixed base are symmetrically provided with four equally-divided interfaces, and a soil pressure box base is fixed from the lower part when the fixed gripper is tightened. The utility model has the advantages that: the method is simple, convenient and quick to operate, interference of surrounding soil bodies on the soil pressure cell test is reduced, and the accuracy of the test result is improved.

Description

Stress testing matching device for three-dimensional soil pressure cell

Technical Field

The utility model belongs to the technical field of geotechnical engineering, in particular to three-dimensional soil pressure cell stress test supporting device and implementation method thereof. The method is particularly suitable for determining the placement direction, the embedding depth and the like of different types of three-dimensional soil pressure cells in various engineering practices.

Background

A series of problems of strength, deformation, stability and the like in the rock-soil body are closely related to the representation of the three-dimensional stress state in the rock-soil body, and the test of the three-dimensional stress plays a very important role in researching various physical and mechanical properties of the rock-soil body. The three-dimensional soil pressure cell is widely applied to engineering tests due to the innovativeness of the three-dimensional soil pressure cell in the three-dimensional stress testing technology, and the stress state of one point in a three-dimensional space can be completely represented. The stress state of one point in the soil body can be tested by embedding the three-dimensional soil pressure box in the soil body to be tested, gathering the data conducting wires and connecting the data conducting wires with the stress testing equipment.

The three-dimensional soil pressure cell needs to be guaranteed to be placed on a horizontal plane in the embedding process, however, in the practical application process, due to the limitation of the embedding site conditions, the spatial position where the soil pressure cell is placed cannot be guaranteed to have no deviation in the embedding process, and meanwhile, due to the fact that various soil pressure cells have the problems that the placing operation steps are complex, the efficiency is low, the embedding depth and angle cannot be accurately obtained in the practical operation process, and the like. Patent 201820902394.3 provides a placer of three-dimensional soil pressure cell, nevertheless because the process of placing need accomplish corresponding operation through rotatory placer, and the influence of placing soil pressure cell spatial position is great, so, the supporting operative installations who solves this problem of a three-dimensional stress test technique of urgent need. And simultaneously, the utility model discloses still provide the implementation method who cooperates supporting operative installations of this kind of three-dimensional stress test technique, provide an effective thinking of going for the construction of actual soil body engineering, can popularize and apply in actual engineering.

Disclosure of Invention

The utility model aims to solve the technical problem that a supporting operative installations of three-dimensional stress test technique and implementation method thereof is provided, can solve the three-dimensional soil pressure cell of current different grade type when placing in narrow and small spaces such as drilling the plane be difficult to confirm, the process is loaded down with trivial details, easily receive the soil body disturbance and bury the difficult scheduling problem of confirming of the degree of depth underground.

In order to realize the first purpose, the utility model adopts the technical scheme that: a stress test matching device for a three-dimensional soil pressure cell comprises a control rod, a connecting rod and a three-dimensional soil pressure cell base fixing gripper, wherein the lower end of the control rod is in threaded connection with the upper end of the connecting rod, and the lower end of the connecting rod is in threaded connection with a threaded groove of the three-dimensional soil pressure cell base fixing gripper; the control rod is formed by an internal support rod and an external sliding rod, a control device is arranged in the support rod, and a first leveling pipe is arranged on the outer wall of the external sliding rod along the vertical direction of the rod;

the connecting rod comprises a connecting inner rod and a connecting outer rod which are respectively in threaded connection with the supporting rod and the sliding rod of the control rod, and a second leveling pipe is arranged on the outer wall of the connecting outer rod along the rod vertical direction;

the three-dimensional soil pressure box base fixing gripper comprises a sliding ring, a fixing base, connecting arms and moving arms, wherein the sliding ring, the fixing base, the connecting arms and the moving arms are arranged up and down, the sliding ring and the fixing base are symmetrically provided with four equal-division interfaces, the four upper equal-division interfaces of the sliding ring are movably connected with the connecting arms, the four lower equal-division interfaces of the fixing base are movably connected with the moving arms, the connecting arms and the moving arms which correspond to each other up and down of the sliding ring and the fixing base are movably connected at the joints through bolts and nuts, the bottom of each moving arm is provided with a horizontal plate, and the soil pressure box base is.

The control device comprises a button, an upper circular base plate, two first semicircular base plates with transverse spring fixing grooves in the middle, a lower circular base plate and two second semicircular base plates with vertical spring fixing grooves in the middle, wherein the button, the upper circular base plate and the two second semicircular base plates are sequentially arranged from top to bottom; vertical springs are fixed on two sides in the vertical spring fixing grooves; a transverse spring is arranged in the transverse spring fixing groove, and a steel ball is arranged at one end of the transverse spring; the supporting rod is provided with a steel ball hole corresponding to the steel ball; and the sliding rod is provided with an upper steel ball hole and a lower steel ball hole corresponding to the steel ball.

The sliding rod is sleeved on the supporting rod.

The connecting rod is provided with a plurality of sections and is spliced by threads.

The fixed base is provided with a lower equal-dividing port every 90 degrees, a lower equal-dividing port thread groove is formed in the fixed base, and the lower equal-dividing port thread groove is in threaded connection with an inner rod at the bottom of the connecting inner rod; the inner wall of the sliding ring is provided with a thread groove which is screwed up and connected with the outer rod thread at the bottom of the outer rod, and the side wall of the sliding ring is provided with an upper equal-dividing connector every 90 degrees.

The number of the lower equal-dividing interfaces, the connecting arms and the moving arms of the fixed base is changed due to different soil pressure box bases.

The utility model has the advantages that: the utility model discloses filled the three-dimensional soil pressure cell of different grade type and placed and implement method's blank. The soil pressure box fixed by the three-dimensional soil pressure box base fixing gripper is placed into a soil body to be measured by the control rod and the connecting rod which are screwed down through threads, the bottom of the three-dimensional soil pressure box is ensured to be in a horizontal state, and therefore the embedding angle of the three-dimensional soil pressure box can be accurately obtained. Meanwhile, the embedding depth of the three-dimensional soil pressure cell can be determined according to the length of the connecting rod, and the three-dimensional soil pressure cell base fixing gripper matched with the three-dimensional soil pressure cell can be used according to different types of the three-dimensional soil pressure cells, so that the three-dimensional soil pressure cell base fixing gripper is suitable for three-dimensional soil pressure cells of different types. The utility model has the characteristics of place easy operation, convenient and fast, reduced the interference that the soil body brought to the test of soil pressure cell on every side, made the test result degree of accuracy improve greatly. Therefore, the utility model discloses have great meaning in the actual engineering.

Drawings

Fig. 1 is a schematic view of a three-dimensional component of a device used in cooperation with the three-dimensional stress testing technology of the present invention;

FIG. 2 is a three-dimensional exploded and assembled view of the control rod of the present invention;

FIG. 3 is a schematic cross-sectional view of the position of the button in the middle support rod according to the present invention;

FIG. 4 is a three-dimensional exploded and assembled view of the connecting rod of the present invention;

fig. 5 is a three-dimensional exploded and assembled view of the three-dimensional soil pressure cell base fixing gripper of the present invention;

FIG. 6 is a schematic view of the control rod and the connecting rod of the present invention;

FIG. 7 is a schematic view illustrating the connection between the connecting rod and the three-dimensional soil pressure box base fixing gripper of the present invention;

FIG. 8 is a schematic view of the control lever of the present invention from releasing to tightening;

FIG. 9 is a schematic view of the connection rod of the present invention from releasing to tightening;

FIG. 10 is a schematic view of the three-dimensional soil pressure cell base fixing gripper of the present invention from releasing to tightening;

FIG. 11 is a schematic view of the three-dimensional soil pressure cell base fixing gripper of the present invention from tightening to loosening;

FIG. 12 is a schematic view of the connection rod of the present invention from tightening to loosening;

FIG. 13 is a schematic view of the control lever of the present invention from tightening to releasing;

fig. 14 is a schematic view of a fixed gripper suitable for use in an orthogonal out-of-plane three-dimensional earth pressure cell base according to the present invention;

fig. 15 is a schematic view of the three-dimensional soil pressure cell and data bus of the present invention;

fig. 16 is a schematic view of another three-dimensional soil pressure cell and data bus according to the present invention.

In the figure:

1. control rod 2, connecting rod 3, three-dimensional soil pressure box base fixing gripper

4. Three-dimensional soil pressure cell 5, data bus 11, bracing piece

12. Sliding rod 111, button 112, button protective cap

113. Steel wire 1141, upper round backing plate 1142, lower round backing plate

1143. First semicircular backing plate 1144, second semicircular backing plate 115, spring retaining groove

116. Horizontal spring 117, steel ball 118 and vertical spring

119. Steel ball hole 1111, end screw thread 121, hollow rod piece

122. Upper steel ball hole 123, lower steel ball hole 124, end screw thread

125. Steel ball sliding groove 1211, first level tube

21. Inner rod 22, outer rod 211 and inner rod thread groove

212. Inner rod thread 221, outer rod thread groove 222 and outer rod thread

2211. Second level pipe

31. Fixed base 32, sliding ring 33, connecting arm

34. Moving arm 35, bolt 36 and nut

311. Lower equally-divided port 312, lower equally-divided port thread groove 321, and upper equally-divided port

322. Thread groove 343, horizontal plate

Detailed Description

The invention will be described in further detail with reference to the following drawings and embodiments:

as shown in figure 1, the utility model discloses a supporting device of three-dimensional pressure cell stress test, including control lever 1, connecting rod 2 and the fixed tongs 3 of three-dimensional soil pressure cell base.

The control rod 1 is shown in fig. 6 and comprises a support rod 11 and a sliding rod 12. As shown in fig. 2 and 3, the support rod 11 includes a button 111, a button protection cap 112, a steel wire 113, an upper circular pad 1141, a lower circular pad 1142, a semicircular pad 1143, a semicircular pad 1144, a spring fixing groove 115, a transverse spring 116, a steel ball 117, a vertical spring 118, a steel ball hole 119, and a head thread 1111. The button 111 is connected with the button protective cap 112 through a steel wire 113, and is fixed on an upper circular base plate 1141 through the steel wire 113, a spring fixing groove 115 is arranged between the upper circular base plate 1141 and a lower circular base plate 1142, one end of a transverse spring 116 is connected with the bottom of the spring fixing groove 115, the other end of the transverse spring is connected with the steel ball 117, two sides of the spring fixing groove 115 are fixed by two semicircular base plates 1143, the lower part of the lower circular base plate 1142 is provided with a vertical spring 118, the vertical spring 118 is fixed on two sides by two semicircular base plates 1144, and the support rod 11 in the. The sliding rod 12 comprises a hollow rod 121, an upper steel ball hole 122, a lower steel ball hole 123, an end screw 124 and a steel ball sliding groove 125, the steel ball 117 can slide in the steel ball sliding groove 125, a first level tube 1211 is arranged on the outer wall of the sliding rod 12 along the direction perpendicular to the steel ball hole 119 to form the sliding rod 12 in the control rod 1, and the sliding rod 12 is sleeved on the support rod 11 to form the control rod 1 shown in fig. 6.

As shown in fig. 6, the connecting rod 2 includes an inner connecting rod 21 and an outer connecting rod 22, as shown in fig. 4, the inner connecting rod 21 has a thread groove 211 at its top end, an inner rod thread 212 at its bottom end, a thread groove 221 at its top end, and an outer rod thread 222 at its bottom end. The outer wall of the outer connecting rod 22 is provided with a second leveling tube 2211 along the direction parallel to the steel ball hole 119, the connecting rod 2 can be screwed and spliced in multiple sections according to the depth of the embedded stress test device, and the outer connecting rod 22 is sleeved on the inner connecting rod 21 to form the connecting rod 2 shown in fig. 6.

The three-dimensional soil pressure box base fixing hand 3 is shown in fig. 5 and comprises a fixing base 31, a sliding ring 32, a connecting arm 33, a moving arm 34, a bolt 35 and a nut 36. The fixed base 31 is provided with equally divided interfaces at intervals of 90 degrees, and the fixed base 31 is internally provided with a thread groove 312, wherein the number of the equally divided interfaces 311 is four. As shown in fig. 7, the thread groove 312 is screwed to the inner rod thread 212 at the bottom of the inner connecting rod 21, and the inner wall of the sliding ring 32 is provided with a thread groove 322 which is screwed to the inner rod thread 212 at the bottom of the outer connecting rod 22. The side wall of the sliding ring 32 is provided with equally divided interfaces every 90 degrees, and the number of the equally divided interfaces 321 is four. The four equally-divided ports 321 on the sliding ring 32 are movably connected with connecting arms 33, the four equally-divided ports 311 on the fixed base 31 are movably connected with moving arms 34, the connecting arms 33 and the moving arms 34 corresponding to the upper and lower parts of the sliding ring 32 and the fixed base 31 are movably connected with each other at the joint points through bolts 35 and nuts 36, the bottom of each moving arm 34 is provided with a horizontal plate 343, and when the fixed gripper 3 is tightened, the soil pressure box base is fixed from the lower part, so that the three-dimensional soil pressure box fixed gripper 3 shown in fig. 5 is formed, and as shown in fig. 14, 15 and 16, according to the difference of the three-dimensional soil pressure box 4, the corresponding three-dimensional soil pressure box base fixed gripper 3 can be used.

The support rod 11 is screwed to the screw groove 211 of the inner connecting rod 21 by the end screw 1111, and the slide rod 12 is screwed to the screw groove 221 of the outer connecting rod 22 by the end screw 124, whereby the control rod 1 and the connecting rod 2 can be screwed as shown in fig. 5. The thread groove 312 on the fixed base 31 is screwed with the inner rod thread 212 at the bottom of the inner connecting rod 21, and the thread groove 322 on the connecting ring 32 is screwed with the outer rod thread 222 at the bottom of the outer connecting rod 22, so as to form a device matched with the three-dimensional stress testing technology shown in fig. 7.

The utility model discloses a three-dimensional stress test technique supporting application apparatus's implementation method, implementation method include following step:

1) determining the size and depth of a drilled hole according to the size of the three-dimensional soil pressure cell and construction conditions, and drilling a hole in a soil body field to be tested in a manual drilling mode;

2) determining the number of connecting rods according to the depth of the drilled hole, splicing and assembling a control rod 1, a connecting rod 2 and a three-dimensional soil pressure box base fixing gripper 3 of a three-dimensional stress testing technology matched using device;

3) a first level tube 1211 on the sliding rod 12 in the control rod 1 and a second level tube 2211 on the connecting rod 2 to the outer rod (22) are adjusted to center the air bubble in both tubes. If not, leveling is needed;

4) as shown in fig. 8-10, the button 111 on the support rod 11 is pressed, the steel ball 117 is retracted from the lower steel ball hole 123, the sliding rod 12 is operated, the steel ball 117 slides from the lower steel ball hole 123 to the upper steel ball hole 122 through the steel ball sliding groove 125, the steel ball 117 is ejected from the upper steel ball hole 122, the connecting outer rod 22 and the sliding ring 32 connected with the sliding rod 12 slide downwards, the connecting arm 33 is pushed to move downwards, the moving arm 34 rotates around the bolt 35 in the lower equal-dividing port 311, the three-dimensional soil pressure box 4 is fixed through the fixed base 31 and the moving arm 34 and is placed in the hole drilled in step 1);

5) observing whether the air bubble of the first leveling tube 1211 on the sliding rod 12 is centered, if not, repeating the operation according to the step 3), and repeatedly adjusting the sliding rod 12 until the air bubble in the tube is centered, so that the three-dimensional soil pressure cell 4 can be accurately placed on a plane;

6) as shown in fig. 11 to 13, the button 111 on the support rod 11 is pressed, the steel ball 117 is retracted from the upper end steel ball hole 122, the sliding rod 12 is operated, the steel ball 117 slides from the upper end steel ball hole 122 to the lower end steel ball hole 123 through the steel ball sliding groove 125, the steel ball 117 is ejected from the lower end steel ball hole 123, the connecting outer rod 22 and the sliding ring 32 connected with the sliding rod slide upwards, the connecting arm 33 is pulled to move upwards, the moving arm 34 rotates around the bolt 35 in the lower halving interface 311, and the moving arm 34 is separated from the three-dimensional soil pressure box 4, so that the device can be pulled out;

7) the data wire 5 is led out from the hole and connected with a data acquisition system, the hole is tightly filled with soil, 6 stress values can be obtained by the data acquisition system, and the three-dimensional stress state in the soil can be obtained according to a corresponding formula.

As can be seen from the above description, the utility model discloses filled the blank of the three-dimensional soil pressure cell of different grade type place and implementation method. In the implementation process, the method has the advantages of simple operation steps, high placement efficiency and innovativeness, can determine the embedding depth of the three-dimensional soil pressure cell and ensure that the soil pressure cell is placed on a horizontal plane, reduces accidental errors caused by placement of the soil pressure cell, and provides more reliable data support for theoretical calculation. Therefore, the method has an important significance which can be popularized in practical engineering.

Claims (6)

1. The utility model provides a supporting device of three-dimensional soil pressure cell stress test which characterized by: the soil pressure box base fixing device comprises a control rod (1), a connecting rod (2) and a three-dimensional soil pressure box base fixing hand grip (3), wherein the lower end of the control rod (1) is in threaded connection with the upper end of the connecting rod (2), and the lower end of the connecting rod (2) is in threaded connection with a threaded groove (322) of the three-dimensional soil pressure box base fixing hand grip (3); the control rod (1) is formed by an inner support rod (11) and an outer sliding rod (12), a control device is arranged inside the support rod (11), and a first leveling pipe (1211) is arranged on the outer wall of the outer sliding rod (12) along the rod vertical direction;

the connecting rod (2) comprises a connecting inner rod (21) and a connecting outer rod (22) which are respectively in threaded connection with the supporting rod (11) and the sliding rod (12) of the control rod (1), and a second leveling pipe (2211) is arranged on the outer wall of the connecting outer rod (22) along the rod vertical direction;

the three-dimensional soil pressure box base fixing hand grab (3) comprises a sliding ring (32), a fixing base (31), a connecting arm (33) and a moving arm (34), wherein the sliding ring (32) and the fixing base (31) are symmetrically provided with four equal division interfaces, the four upper equal division interfaces (321) of the sliding ring (32) are movably connected with the connecting arm (33), the four lower equal division interfaces (311) of the fixing base (31) are movably connected with the moving arm (34), the connecting arm (33) and the moving arm (34) which correspond to each other up and down of the sliding ring (32) and the fixing base (31) are movably connected with each other at a joint through a bolt (35) and a nut (36), and a horizontal plate (343) is arranged at the bottom of the moving arm (34) and is used for fixing the soil pressure box base from the lower part when the fixing hand grab (3) is tightened.

2. The three-dimensional soil pressure cell stress test matching device of claim 1, wherein: the control device comprises a button (111), an upper circular base plate (1141), two first semicircular base plates (1143) with a transverse spring fixing groove (115) in the middle, a lower circular base plate (1142) and two second semicircular base plates (1144) with a vertical spring fixing groove (115) in the middle, wherein the button (111) is provided with a protective cap (112) connected through a steel wire (113) and fixed on the upper circular base plate (1141); vertical springs (118) are fixed on two sides in the vertical spring fixing grooves (115); a transverse spring (116) is arranged in the transverse spring fixing groove (115), and a steel ball (117) is arranged at one end of the transverse spring (116); a steel ball hole (119) is formed in the support rod (11) corresponding to the steel ball (117); an upper steel ball hole (122) and a lower steel ball hole (123) are formed in the sliding rod (12) corresponding to the steel ball (117).

3. The three-dimensional soil pressure cell stress test matching device of claim 1, wherein: the sliding rod (12) is sleeved on the supporting rod (11).

4. The three-dimensional soil pressure cell stress test matching device of claim 1, wherein: the connecting rod (2) is provided with a plurality of sections and is spliced by threads.

5. The three-dimensional soil pressure cell stress test matching device of claim 1, wherein: the fixed base (31) is provided with a lower equal-division port (311) at intervals of 90 degrees, a lower equal-division port thread groove (312) is formed in the fixed base (31), and the lower equal-division port thread groove (312) is screwed and connected with an inner rod thread (212) at the bottom of the connecting inner rod (21); the inner wall of the sliding ring (32) is provided with a thread groove (322) which is screwed with the outer rod thread (222) at the bottom of the outer connecting rod (22), and the side wall of the sliding ring (32) is provided with an upper equal connector (321) at intervals of 90 degrees.

6. The three-dimensional soil pressure cell stress test matching device of claim 1, wherein: the number of the lower equal-dividing ports (311), the connecting arms (33) and the moving arms (34) of the fixed base (31) is changed according to different soil pressure box bases.

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