CN216791896U - In-situ load grouping test device in hydropower engineering tunnel - Google Patents

Abstract

A hydroelectric engineering in-hole in-situ load grouping test device comprises a force transmission column, a counterforce cross beam, a top plate and at least two groups of pressure-bearing devices; wherein, roof fixed connection passes the stand top, passes stand bottom fixed connection reaction crossbeam, and reaction crossbeam fixed connection pressure-bearing device sets up hydraulic means in the pressure-bearing device. The two sides of the force transmission column are uniformly and vertically provided with oblique supporting structures for strengthening the strength of the force transmission column, at least three hydraulic jacks are arranged between each pair of bearing plates and the bottom plate, and the periphery of each hydraulic jack is tightly and circularly provided with a protection device. The testing device greatly shortens the in-situ load testing time, reduces a large amount of manpower and financial resources, can quickly obtain accurate dam material mechanical parameters, improves the stability of the hydraulic device and the transmission stand column, and ensures the whole safe operation of the in-situ load device.

Description

In-situ load grouping test device in hydropower engineering tunnel

Technical Field

The invention relates to the technical field of in-situ load test devices, in particular to a grouped test device for in-situ load in a hydropower engineering tunnel.

Background

In hydroelectric engineering, the mechanical parameters of dam building materials are important indexes for measuring the deformation and the permeation stability of a dam body. At present, an in-situ load test is the best means for determining dam material rock-soil body engineering characteristics, and the ground stress, the deformation modulus and the shear strength of dam material rock-soil bodies and the residual stress of weak interlayer or structural surfaces in the rock-soil bodies are determined through the in-situ load test. The test method has small disturbance to factors such as dam material structure, density, humidity and the like, and the test result has higher reliability, so the in-situ load test is the most common method for measuring mechanical parameters of the dam material. .

In the in-situ load test, thousands of tons of vertical pressure need to be loaded on a test dam material, the in-situ load test can be placed in a hole of hydroelectric engineering, and the reaction force provided by the top in the hole is utilized for the test. Conventional in situ load testing devices have only one set of load plates with one or two hydraulic devices used in conjunction with the set of load plates to apply pressure to the top of the hole. During testing, the test dam material is subjected to layered filling and rolling according to the field requirements, and then an in-situ load test is carried out to obtain a group of test data; in order to ensure the accuracy of data, each layer of dam material needs to be tested after being subjected to multiple filling and rolling treatments, so that multiple groups of data are obtained, and accurate test results can be obtained after the obtained multiple groups of data are processed and analyzed; however, a large amount of manpower and time are needed in the multiple filling and rolling processes, and the efficiency is low; one or two groups of hydraulic devices positioned between the upper load plate and the lower load plate are not stable enough in the operation process, and are easy to incline, so that the accuracy of a measuring result is influenced, and potential safety hazards exist; the force transmission column is not provided with a supporting structure, so that lateral instability is easy to occur after being pressed, and test accidents are caused.

Disclosure of Invention

The invention aims to solve the technical problem of providing a hydropower engineering in-situ load testing device, which not only can quickly obtain accurate dam material mechanical parameters, but also greatly shortens the testing time, reduces a large amount of manpower and financial resources, improves the stability of a hydraulic device and a transmission upright post, and ensures the integral safe operation of the in-situ load testing device.

In order to solve the technical problems, the technical scheme provided by the invention is to provide a hydropower engineering in-hole in-situ load grouping test device, which comprises a force transmission column, a counter-force beam, a top plate and at least two groups of pressure-bearing devices, wherein the force transmission column is connected with the counter-force beam through a connecting rod; wherein, roof fixed connection passes the stand top, passes stand bottom fixed connection reaction crossbeam, and reaction crossbeam fixed connection pressure-bearing device sets up hydraulic means in the pressure-bearing device.

Preferably, the oblique supporting structures are uniformly and vertically arranged on two sides of the force transmission column to reinforce the strength of the force transmission column.

The pressure-bearing device comprises a pressure-bearing plate, a bottom plate and a hydraulic device, wherein the center of the pressure-bearing plate is opposite to the center of the bottom plate, and the hydraulic device is arranged between the pressure-bearing plate and the bottom plate.

The periphery of the hydraulic device is tightly surrounded with a protective device, preferably a corrugated steel web.

Preferably, the hydraulic device is not less than three hydraulic jacks.

Preferably, the pressure-bearing means are evenly distributed over the lower part of the counter beam.

Preferably, the joint of the force transmission column and the reaction beam is reinforced by stiffening ribs, and a plurality of groups of stiffening ribs are symmetrically arranged on two sides of the reaction beam.

Preferably, the pressure bearing plate is internally reinforced by stiffening ribs.

According to the in-situ load grouping test device in the hydropower engineering tunnel, multiple groups of pressure-bearing devices are arranged, and the rolled dam materials can be subjected to grouping test at one time, so that the times of filling and rolling are reduced exponentially, the test time is shortened, and the test efficiency is improved; the oblique supporting structures are arranged on the two sides of the force transmission column, so that the force transmission column is prevented from being laterally unstable under pressure, and test accidents are avoided; the middle of each pair of bearing plates and the bottom plate is provided with at least three hydraulic devices, and the periphery of each hydraulic device is tightly surrounded by a protection device, so that the stability of the hydraulic devices in the operation process is ensured, the inclination is not easy to cause, the accuracy of the measurement result is ensured, and the integral safe operation of the test device is also ensured.

Drawings

Fig. 1 is a schematic front view of the present invention.

Fig. 2 is a side view of the present invention.

Fig. 3 is a schematic structural view of a pressure bearing plate.

Fig. 4 is a schematic view of the assembly of the hydraulic device with the protective device.

Fig. 5 is a schematic structural view of the corrugated steel web protector.

Detailed Description

With respect to the above technical solutions, preferred embodiments are described in detail with reference to fig. 1 to 5.

The in-situ load grouping test device in the hydropower engineering hole comprises a top plate 1, a force transmission column 2, a counter-force cross beam 3 and two groups of pressure-bearing devices, wherein a group of hydraulic devices are arranged between each pair of pressure-bearing plates 4 and a bottom plate 5. Each group of pressure-bearing devices comprises a pressure-bearing plate 4 and a bottom plate 5, and each group of hydraulic devices comprises three hydraulic jacks 6.

The top end of the device is a top plate 1, and then the transmission upright post 2, the counter-force beam 3, the two bearing plates 4, the two groups of hydraulic devices and the bottom end of the device are two bottom plates 5 in turn.

Even, the vertically is provided with two slant bearing structure 8 in the both sides of dowel steel 2, and slant bearing structure 8 plays the reinforcing effect to dowel steel 2 to prevented dowel steel 2 from taking place the side direction unstability after receiving pressure, avoided experimental accident.

The transmission upright post 2 is connected with the top plate 1, the transmission upright post 2 is connected with the reaction beam 3, and the two inclined support structures 8 are connected with the transmission upright post 2 through welding; reinforcing the joint of the force transmission column 2 and the reaction cross beam 3 by adopting a plurality of groups of stiffening ribs 21; a plurality of sets of stiffening ribs 31 are symmetrically welded to both sides of the reaction beam 3, thereby increasing the endurance strength of the reaction beam 3.

The bearing plate 4 is of an I-shaped structure, and a plurality of groups of stiffening ribs 41 are adopted for reinforcement treatment inside the I-shaped structure; four corners of the top of the bearing plate 4 are provided with mounting through holes 42, the bearing plate is connected with the counter-force beam 3 through the mounting through holes 42 by bolts, and the number of the bolts needs to meet the strength requirement; the upper surface of the bearing plate 4 is planar, thereby ensuring that the top of the bearing plate 4 is in full contact with the counter-force beam 3.

The bottom plate 5 is of a flat plate structure, and the bottom surface of the bottom plate is a plane, so that the bottom of the bottom plate 5 is ensured to be in complete contact with the test dam material.

The two bearing plates 4 are uniformly distributed on the lower part of the counter-force beam 3, and the central parts of the bearing plates 4 and the bottom plate 5 are opposite to ensure that the two groups of bearing devices are stressed consistently, so that the whole test device is more stable in operation.

Three hydraulic jacks 6 are arranged between each pair of bearing plates 4 and the bottom plate 5, and the three hydraulic jacks 6 are more stable and not easy to incline relative to one or two hydraulic jacks of a conventional in-situ load test device, so that the accuracy of a measuring result is ensured. A protective device 7 is tightly surrounded on the periphery of the three hydraulic jacks 6. The protection device 7 is an annular through hole structure formed by winding a rectangular hard metal thin plate, the hydraulic jack 6 is wrapped by the protection device 7 in a surrounding mode, and the hydraulic jack is fastened and fixed outside by a metal wire. The protection device 7 is preferably a corrugated steel web 71. The protection device 7 is tightly wound around the periphery of the three hydraulic jacks 6, so that the stability of the hydraulic device in the operation process is ensured, the inclination is not easy to cause, and the integral safe operation of the test device is ensured.

The bottom of the bearing plate 4 and the top of the bottom plate 5 are provided with grooves, and the bottoms of the grooves are planes. The top of the hydraulic jack 6 is positioned in the groove at the bottom of the bearing plate 4, the base of the hydraulic jack 6 is placed in the groove at the top of the bottom plate 5, and the plane structure at the bottom of the groove ensures that the top of the hydraulic jack 6 is in complete contact with the bearing plate 4 and the base of the hydraulic jack 6 is in complete contact with the bottom plate 5.

The top plate 1, the force transmission column 2, the counter-force beam 3, the two inclined support structures 8, the two bearing plates 4 and the two bottom plates 5 are all made of steel.

When the device is used, test dam materials are filled and rolled in layers in a hole according to test requirements, then the device is placed on the processed test dam materials, and the two bottom plates 5 compact respective areas to be tested respectively. Upward force is applied to the bearing plate 4 through the transmission of the hydraulic jack 6, so that the counter-force beam 3, the transmission upright post 2 and the top plate 1 are pushed to move upwards, the top plate 1 directly applies pressure to the hole top, the counter-force of the hole top is transmitted downwards to the bottom plate 5, and the bottom plate 5 applies pressure required by the test dam material. The hydraulic jack 6 is connected with a hydraulic sensor, and the pressure borne by the test dam material is adjusted through the hydraulic sensor. The bottom plate 5 is connected with a position sensor, and corresponding physical data of the dam material are measured through the position sensor. Because the device is provided with two groups of pressure-bearing devices, and two bottom plates 5 respectively correspond to a region to be measured, the device can simultaneously measure two groups of data each time, thereby exponentially reducing the times of filling and rolling and shortening the test time.

In actual use, the number of the pressure-bearing devices is not limited to two groups, three or more groups can be arranged according to actual conditions, the times of filling and rolling can be reduced, and the efficiency is improved; the number of the hydraulic jacks 6 is not limited to three, and the number can be more according to the pressure required by the test.

By arranging a plurality of groups of pressure-bearing devices (namely a plurality of pairs of pressure-bearing plates and bottom plates), the in-situ load grouping test device in the hydropower engineering tunnel can perform grouping test on rolled dam materials at one time, thereby exponentially reducing the times of filling and rolling, shortening the test time and improving the test efficiency; the oblique supporting structures are arranged on the two sides of the force transmission column, so that the force transmission column is prevented from being laterally unstable under pressure, and test accidents are avoided; the middle of each pair of bearing plates and the bottom plate is provided with at least three hydraulic devices, and the periphery of each hydraulic device is tightly surrounded by a protection device, so that the stability of the hydraulic devices in the operation process is ensured, the inclination is not easy to cause, the accuracy of the measurement result is ensured, and the integral safe operation of the test device is also ensured.

Claims (10)

1. A hydroelectric engineering in-hole in-situ load grouping test device is characterized by comprising a force transmission column, a counter-force beam, a top plate and at least two groups of pressure-bearing devices; wherein, roof fixed connection passes the stand top, passes stand bottom fixed connection reaction crossbeam, and reaction crossbeam fixed connection pressure-bearing device sets up hydraulic means in the pressure-bearing device.

2. The in-situ load grouping test device in a hydroelectric engineering tunnel according to claim 1, wherein an oblique support structure for reinforcing the strength of the force transfer column is uniformly and vertically arranged on two sides of the force transfer column.

3. A hydroelectric engineering tunnel internal in-situ load grouping test device as claimed in claim 2, wherein an oblique support structure is arranged on each side of the force transfer column.

4. A hydroelectric engineering in-hole in-situ load grouping test device as claimed in any one of claims 1 to 3 wherein the pressure bearing device comprises pressure bearing plates with opposite centers, a bottom plate and a hydraulic device arranged between the pressure bearing plates and the bottom plate.

5. The in-situ load grouping test device in a hydroelectric engineering hole according to claim 4, wherein a protection device is tightly surrounded on the periphery of the hydraulic device.

6. The in-situ load grouping test device in a hydroelectric engineering hole according to claim 5, wherein the protection device is a corrugated steel web.

7. A hydroelectric engineering in-hole in-situ load grouping test device as claimed in any of claims 5 to 6, wherein the hydraulic device is not less than three hydraulic jacks.

8. A hydroelectric project in-hole in-situ load grouping test device as claimed in claim 7, wherein the pressure bearing devices are evenly distributed on the lower part of the counter-force beam.

9. The hydroelectric engineering in-hole in-situ load grouping test device of claim 7, wherein the joints of the force transfer columns and the reaction beams are reinforced by stiffening ribs, and the two sides of the reaction beams are symmetrically provided with a plurality of groups of stiffening ribs for reinforcement.

10. The in-hole in-situ load grouping test device for the hydroelectric engineering according to claim 7, wherein the pressure bearing plate is internally reinforced by stiffening ribs.

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