CN217561172U - Concrete lining segment bending test device - Google Patents

Abstract

The utility model relates to a concrete lining segment bending test device, which relates to the field of precast concrete testing, and comprises a pair of opposite reaction columns, wherein no less than two rows of bolt holes are regularly arranged on the reaction columns, and high-strength bearing bolts are adopted to anchor the reaction columns on a terrace through the bolt holes; one side of the reaction column opposite to the other side is provided with a first jack, a steel plate is arranged below each first jack, and each steel plate is provided with a movable support; the gantry is anchored between the two reaction columns; the portal frame further comprises a second jack, a strain gauge and a vertical force frame in sequence, in the vertical direction, one end of the second jack is connected with the portal frame, the other end of the second jack is connected with the strain gauge, and the other end of the strain gauge is further connected with the vertical frame. The utility model discloses and compare in the device that is used for testing concrete lining section of jurisdiction generally, this experimental apparatus cost is lower, has better economic benefits.

Description

Concrete lining section of jurisdiction test device that bends

Technical Field

The utility model relates to a precast concrete test field, concretely relates to concrete lining section of jurisdiction test device that bends.

Background

The device that is generally used for testing concrete lining section of jurisdiction provides the level by the counterforce wall and to the thrust that turns back, utilizes very heavy horizontal force of appling to the lining section of jurisdiction, provides vertical thrust through the portal frame simultaneously, utilizes jack to apply vertical force to the lining section of jurisdiction to carry out the bending experiment of lining section of jurisdiction. However, the reaction wall of the device cannot move, and the device cannot be used for testing lining segments with different sizes, for example, the lining segments have various sizes in subway tunnel construction, and specifications such as 6700mm/6000mm, 6000mm/5400mm, 8300mm/7500mm and the like in terms of outside/inside diameters.

SUMMERY OF THE UTILITY MODEL

The utility model provides a pair of concrete lining section of jurisdiction test device that bends anchors the concrete piece on the counter-force terrace through the pressure-bearing bolt that excels in to provide the precompression, utilize the frictional force on counter-force post and ground to act as the reaction force, this kind of mode can be along with the change with the prestressing force bolt anchor in the different zone realization counter-force column interval, thereby makes the experimental apparatus more nimble, is applicable to the concrete lining section of jurisdiction of multiple size. And compare in the device that is used for testing concrete lining section of jurisdiction generally, this experimental apparatus cost is lower, has better economic benefits.

The utility model discloses specifically including a pair of reaction post that sets up relatively, set up according to the law on the reaction post and be no less than two rows of bolt holes, adopt the pressure-bearing bolt that excels in to pass through the bolt hole will the reaction post anchor is on the terrace. Similarly, a portal frame is anchored on the terrace by a high-strength pressure-bearing bolt between the two reaction columns. The portal frame further comprises a vertical force frame, hydraulic jacks are installed at the design positions of the reaction column and the portal frame, and movable supports are arranged on the inner sides of the reaction column in pairs.

Furthermore, a rubber pad covers the top cover and the base of the first jack.

Furthermore, 4 rows of bolt holes are arranged on the reaction column, each row is 4, and the distance between the bolt holes is 500mm.

Furthermore, the counter-force post interval 500mm sets up the reinforcing bar in addition, and this setting can prevent that the counter-force post from taking place the fracture in the maintenance process to and at the uncertain factor of hoist and mount, transportation process, and guarantee to have sufficient safe deposit.

Furthermore, the vertical force frame is symmetrically provided with the gaskets, so that the load can be uniformly transmitted to the surface of the duct piece, and the distance of the vertical load is ensured to be unchanged.

The utility model discloses a setting can adjust the counter-force post of interval in a flexible way, can test the concrete lining section of jurisdiction of various sizes. The different test devices are avoided from being appointed aiming at the concrete prefabricated parts with different specifications. And the utility model discloses a movable support for the concrete lining section of jurisdiction can remove about because the relation of atress in the testing process, has avoided the not even or terrace of both sides atress and concrete lining section of jurisdiction's frictional force to influence the test result.

Drawings

The invention is further described with reference to the following figures and examples.

FIG. 1: utility model concrete lining section of jurisdiction test device schematic diagram that bends.

1-a reaction column; 2-bolt hole; 3-a steel plate; 4, a movable support; 5-a first rubber pad; 6-a first jack; 7-second rubber pad; 8, gantry; 9-a second jack; 10-a strain gauge; 11-vertical stands; 12-a gasket; 13-a duct piece;

Detailed Description

Referring to the drawings in detail, as shown in fig. 1, the experimental device includes a reaction column 1, a bolt hole 2, a steel plate 3, a movable support 4, a first rubber pad 5, a first jack 6, a second rubber pad 7, a gantry 8, a second jack 9, a strain gauge 10, a vertical stand 11, a gasket 12 and a duct piece 13.

The high-strength pressure-bearing bolt anchors a pair of oppositely arranged reaction columns 1 on a floor at intervals through bolt holes 2, the portal frame 8 is anchored in the middle of the two reaction columns through the high-strength pressure-bearing bolt, the first jack 6 is arranged at a design position, and as shown in the figure, the first rubber pad 5 covers the top cover and the base of the first jack 6. A steel plate 3 is arranged below each first jack 6, and a movable support 4 is arranged on each steel plate 3.

In the middle of two reaction columns 1, anchor portal frame 8 in the terrace with the pressure-bearing bolt that excels in, as shown in fig. 1, set up second jack 9 on the portal frame, strainometer 10 and vertical grudging post 11, vertical grudging post 11 below symmetry sets up gasket 12, can guarantee like this to transmit the section of jurisdiction surface evenly with the load to guarantee that vertical load's distance is unchangeable.

In the design process the bolt holes 2 of the reaction force post 1 may be arranged in at least 2 rows of 4 bolts each.

In the specific design and manufacture, the size of the reaction column 1 is selected to be 2m × 1m, the concrete grade C40 is reserved with 16 bolt holes of 4 × 4, and the distance between the bolt holes is 500mm. And reaction column 1 still sets up the reinforcing bar, and the reinforcing bar diameter adopts 18mm, and the interval 500mm, can prevent like this that the cracking from taking place in the reaction column maintenance process to and at the uncertain factor of hoist and mount, transportation, and guarantee to have sufficient safe deposit.

Reaction column 1 links to each other with the terrace through 16 pressure-bearing bolts that excel in, utilizes the frictional force between reaction column 1 and the terrace to provide the axial force for the section of jurisdiction, and frictional force calculates according to sliding friction, and every pressure-bearing bolt that excels in can exert 200kN pressure to the reaction column. The portal frame 8 used in the device is a steel structure support, is connected with the terrace through a high-strength bearing bolt, has the design bearing capacity far larger than the vertical pressure required by the test, can provide enough vertical pressure for the test, and can be considered according to a rigid structure. And a movable support 4 is additionally manufactured to support the duct piece 13, and the duct piece 13 can slide left and right in the loading process. The movable support is made of a Q235 common carbon structural solid steel plate with the thickness of 20mm, and the vertical force frame is mainly used for uniformly transmitting load to the surface of the segment and ensuring that the distance of the vertical load is unchanged. According to the actual size of the concrete segment and the loading load set in the test scheme, the vertical force frame is made of a Q235 common carbon structural solid steel plate with the thickness of 20 mm.

The jack uses 200t electric hydraulic jack, and electric jack is a jack-up hydraulic tool used with the supporting use of electric oil pump. It is widely used in construction engineering, shipbuilding, metallurgy, mining, petroleum, chemical engineering, railway engineering and other industries for well jacking, drawing, extruding and other operations. The jack can be used vertically and can also realize the functions in any directions such as horizontal and inclined. It has the advantages of small operating force, low labor intensity, flexible piston lifting and changing, high speed, simple structure, small volume, light weight and high safety. The electric jack can be divided into a hydraulic control one-way jack and a hydraulic control one-way jack without the hydraulic control one-way valve. After the ultrahigh pressure hydraulic control one-way valve is prepared, the piston can stay at any position, and the piston is a key component for realizing the functions of self-locking, positioning, pressure maintaining and the like. The jack is connected with the oil pump by a high-pressure hose provided with a quick-change connector. The assembly and disassembly are convenient, flexible and safe, and the operation can be carried out far away from the operation place, thereby being beneficial to ensuring the safety in dangerous operation. After the accessory device is arranged on the jack, the purpose of achieving high stroke by low height can be achieved, and the stroke application range is greatly enlarged. The oil pump is an ultrahigh pressure oil pump consisting of a three-phase asynchronous motor, a low pressure oil pump, a high pressure oil pump, an oil tank and the like, and an ultrahigh pressure oil pump consisting of an oil tank and the like, has the advantages of high pressure, compact structure, high efficiency, convenience in use and the like, and is provided with a reversing valve, a pressure gauge and a pressure regulating system.

The utility model discloses the installation step of device is:

the first step is as follows: the high-strength bearing bolt penetrates through the reserved bolt hole of the reaction column, and the reaction column is anchored on the reaction terrace by using the prestress wrench, so that enough friction force can be provided to serve as the reverse thrust.

The second step is that: and the portal frame is anchored on the counter-force terrace by using the high-strength bearing bolt.

The third step: rubber pads are covered on the top cover and the base of the hydraulic jack, and the jack is fixed on the reaction column and the portal frame.

The fourth step: and installing the movable support, and installing a gasket on the contact surface of the movable support and the pipe piece.

The fifth step: and a vertical force frame is arranged at the top cover of the vertical jack, so that the uniform stress of the duct piece is ensured.

And a sixth step: and hoisting the pipe piece, and starting a bending experiment of the lining pipe piece.

Claims (5)

1. The utility model provides a concrete lining section of jurisdiction test device that bends which characterized in that: the device comprises a pair of reaction columns which are oppositely arranged, wherein at least two rows of bolt holes are regularly arranged on the reaction columns, and the reaction columns are anchored on the terrace by adopting high-strength pressure-bearing bolts through the bolt holes; one side of the reaction column opposite to the reaction column is provided with a first jack, a steel plate is arranged below each first jack, and each steel plate is provided with a movable support;

the portal frame is anchored between the two reaction columns; the portal frame further comprises a second jack, a strain gauge and a vertical force frame in sequence, one end of the second jack is connected with the portal frame, the other end of the second jack is connected with the strain gauge, and the other end of the strain gauge is further connected with a vertical frame.

2. The concrete lining segment bending test device of claim 1, which is characterized in that: the top cover and the base of the first jack are covered with rubber pads.

3. A concrete lining segment bending test device according to claim 2, wherein: the bolt hole on the reaction column sets up 4 rows, and every row is 4, just interval between the bolt hole is 500mm.

4. The concrete lining segment bending test device of claim 3, wherein: reinforcing steel bars are further arranged at intervals of 500mm on the reaction force columns.

5. A concrete lining segment bending test device according to claim 3, wherein: the vertical force frame is symmetrically provided with gaskets.

Images