CN219161909U

CN219161909U - Controllable low-strength soil-based fluidity backfill material anti-segregation performance testing device

Info

Publication number: CN219161909U
Application number: CN202320050839.0U
Authority: CN
Inventors: 李朝晖; 李鑫; 张立娟; 施娇婕; 轩俊杰
Original assignee: Northwest Minzu University
Current assignee: Northwest Minzu University
Priority date: 2023-01-09
Filing date: 2023-01-09
Publication date: 2023-06-09
Anticipated expiration: 2033-01-09

Abstract

The utility model discloses a controllable low-strength soil-based fluidity backfill material segregation resistance performance testing device which comprises a bottom plate and a bench scale bearing box, wherein an aggregate sleeve screen is arranged at the top of the bottom plate, four support posts are arranged at the top of the bottom plate, a water pipe is arranged above the bench scale bearing box, the bench scale bearing box is attached to the tops of the four support posts, a partition plate is arranged at the top of the bench scale bearing box, a plurality of cylinder bodies are arranged above the bottom plate, partition plates are attached to the inner sides of the cylinder bodies, and the inner sides of adjacent cylinder bodies are fixedly connected through sample moving fastening bolts, sample loading fastening bolts, bolts and partition plate sleeve fastening bolts. The utility model relates to the technical field of building materials, and aims to effectively monitor the segregation resistance of a controllable low-strength soil-based flowable backfill material through the cooperation among a cylinder body, a partition plate and a sample loading fastening bolt, so that the aggregate distribution characteristics can be evaluated, the segregation degree can be judged, and a basis is provided for adjusting the mix proportion design and evaluating the construction quality.

Description

Controllable low-strength soil-based fluidity backfill material anti-segregation performance testing device

Technical Field

The utility model relates to the technical field of building materials, in particular to a controllable low-strength soil-based fluidity backfill material segregation resistance testing device.

Background

The controllable low-strength soil-based flowable backfill material is a novel backfill material for the current civil engineering backfill engineering river basin, and is generally prepared from excavated dregs, cement, fly ash, sand aggregate and an additive according to a certain mixing ratio. The backfill material can be widely used in backfill engineering of roads, pipelines, foundation pits and the like, particularly in backfill of narrow spaces, can automatically level with controllable strength without vibrating, can adopt industrial solid waste derived aggregate, and has wide aggregate inclusion. In practical construction and laboratory mix proportion design, the segregation state and bleeding property of the material are required to be judged, and the content of each component is further regulated, so that the strength, permeability and construction quality of the hard-set mixture are evaluated and predicted, and therefore, a controllable low-strength soil-based fluidity backfill material segregation resistance testing device is required to be developed.

When the soil-based flowable backfill material is placed in the material containing cylinder for 2 hours or 20 minutes before initial setting, samples in the upper, middle and lower three-layer cylinders are separated by the separating plate, and fastening bolts are installed to translate each cylinder and the samples to the height-adjustable weighing bearing table. After weighing, the sample is poured into the uppermost layer of the bone material sleeve sieve for water washing screening analysis. And judging the distribution characteristics of the aggregate of the soil-based flowable backfill material through screening analysis, so as to judge the segregation resistance of the soil-based flowable backfill material.

However, at present, no corresponding standard and method are available for testing the segregation resistance of the material, and the segregation resistance test of the concrete has a plurality of defects, such as large difference of aggregate particle size, great difference of fluidity requirements, strength requirement difference and the like, which cause the lack of pertinence of test results, and can not guide the mix proportion design and performance evaluation well.

Disclosure of Invention

Aiming at the defects of the prior art, the utility model provides a controllable low-strength soil-based fluidity backfill material anti-segregation performance testing device, which solves the problems that the anti-segregation performance of the material is tested by corresponding specifications and methods at present, and the design of the mixing ratio and the performance evaluation cannot be guided well.

In order to achieve the above purpose, the present utility model is realized by the following technical scheme: the utility model provides a controllable low strength soil base fluidity backfill material anti-segregation capability test device, includes bottom plate and bench scale carrier box, aggregate sleeve sieve is installed at the top of bottom plate, four pillars are installed at the top of bottom plate, the top of bench scale carrier box is provided with the water pipe, four the laminating of the top of pillar has the bench scale carrier box, the baffle is installed at the top of bench scale carrier box, the top of bottom plate is provided with a plurality of barrels, and is a plurality of the inboard laminating of barrel has the division board, adjacent the inboard of barrel is through moving appearance fastening bolt, dress appearance fastening bolt, bolt and baffle sleeve fastening bolt fixed connection.

Preferably, a handle is arranged below the isolation plate.

Preferably, the four corners of the bottom of the table scale bearing box are fixedly connected with rod bodies movably connected with top grooves of the supporting columns, the outer walls of the four supporting columns are fixedly connected with plate bodies, the inner threads of the plate bodies are connected with screw rods, and the upper parts of the outer walls of the screw rods are rotatably connected with the bottom of the table scale bearing box through bearings.

Preferably, a handle is arranged at the bottom of the screw rod.

Preferably, scales are machined on the outer side of the rod body.

Advantageous effects

The utility model provides a controllable low-strength soil-based flowable backfill material segregation resistance testing device. The beneficial effects are as follows: according to the device for testing the segregation resistance of the controllable low-strength soil-based mobile backfill material, the segregation resistance of the controllable low-strength soil-based mobile backfill material is effectively monitored through the cooperation among the cylinder, the isolation plate and the sample loading fastening bolts, the aggregate distribution characteristics can be evaluated, the segregation degree is judged, and a basis is provided for adjusting the mix proportion design and evaluating the construction quality.

Drawings

FIG. 1 is a schematic diagram of the structure of the present utility model;

FIG. 2 is a schematic view of the structure of the scale carrying case, scale and plate of the table of FIG. 1;

FIG. 3 is a schematic view of the structure of the cylinder, the separator and the sample-loading fastening bolts in FIG. 1;

FIG. 4 is a schematic view of the structure of the barrel, bolts and spacer sleeve fastening bolts of FIG. 1;

fig. 5 is a schematic view of the structure of the separator and the handle.

In the figure: 1. the device comprises a bottom plate, 2, a handle, 3, an aggregate screen, 4, a pillar, 5, a partition plate, 6, a water pipe, 7, a bench scale bearing box, 8, a rod body, 9, scales, 10, a plate body, 11, a screw, 12, a cylinder body, 13, a partition plate, 14, a sample loading fastening bolt, 15, a sample moving fastening bolt, 16, a handle, 17, a bolt, 18 and a partition plate sleeve fastening bolt.

Detailed Description

The following description of the embodiments of the present utility model will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present utility model, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without making any inventive effort, are intended to be within the scope of the utility model.

At present, no corresponding standard and method are available for testing the segregation resistance of the material, and the segregation resistance test of concrete has a plurality of defects, such as large difference of aggregate particle size, great difference of fluidity requirements, strength requirement difference and the like, which cause the lack of pertinence of test results, and can not guide the mix proportion design and performance evaluation well.

In view of the above, the device for testing the segregation resistance of the controllable low-strength soil-based flowable backfill material is provided, the segregation resistance of the controllable low-strength soil-based flowable backfill material is effectively monitored through the cooperation among the cylinder body, the isolation plate and the sample loading fastening bolts, the aggregate distribution characteristics can be evaluated, the segregation degree is judged, and the basis is provided for adjusting the mix proportion design and evaluating the construction quality.

The components in the present case are sequentially connected by a person skilled in the art, and specific connection and operation sequence should be referred to the following working principle, and the detailed connection means thereof are known in the art, and the following working principle and process are mainly described.

Embodiment one: as can be seen from fig. 1-5, a controllable low-strength soil-based fluidity backfill material segregation resistance testing device comprises a bottom plate 1 and a bench scale bearing box 7, wherein a collecting sleeve screen 3 is installed at the top of the bottom plate 1, four support posts 4 are installed at the top of the bottom plate 1, a water pipe 6 is arranged above the bench scale bearing box 7, the bench scale bearing box 7 is attached to the top of the four support posts 4, a partition plate 5 is installed at the top of the bench scale bearing box 7, a plurality of cylinders 12 are arranged above the bottom plate 1, a partition plate 13 is attached to the inner sides of the cylinders 12, the inner sides of adjacent cylinders 12 are fixedly connected through sample moving fastening bolts 15, sample loading fastening bolts 14, bolts 17 and partition plate sleeve fastening bolts 18, the upper and lower partition plates 13 can rotate 360 degrees, and the material loading cylinders 12 can be completely opened for loading when rotating for 90 degrees. The split cylinder 12 is formed of three cylinders of the same diameter and height, with the upper and middle cylinders having no bottom and the lower cylinder having a bottom;

in particular, it is worth mentioning that the partition 13 can be rotated to either completely open the mouth or completely close the bottom of the tub. The bolts can fix the upper, middle and lower cylinder bodies 12 and connect the fixed cylinder bodies 12 and the isolation plate 13, and only one bolt 17 can be installed to serve as a rotating shaft of the isolation plate 13;

further, a handle 16 is arranged below the isolation plate 13;

in particular, the handle 16 is convenient for the user to pull the isolation board 13 for moving;

further, rod bodies 8 movably connected with top grooves of the support columns 4 are fixedly connected to four corners of the bottom of the table scale carrying box 7, the rod bodies 8 can move in the top grooves of the support columns 4, the outer walls of the four support columns 4 are fixedly connected with plate bodies 10, screw rods 11 are connected with inner threads of the plate bodies 10, the upper parts of the outer walls of the screw rods 11 are rotatably connected with the bottom of the table scale carrying box 7 through bearings, and the screw rods 11 can rotate through the bearings;

in the specific implementation process, it is worth particularly pointing out that a user can realize the up-and-down motion of the table scale carrying case 7 by rotating the screw 11, so as to realize the lifting adjustment of the table scale carrying case 7, and the height adjustment range is 75 mm-150 mm;

further, a handle 2 is arranged at the bottom of the screw 11;

in particular, it should be pointed out that the handle 2 allows the user to rotate the screw 11;

further, the outer side of the rod body 8 is provided with a scale 9;

in the specific implementation process, it is worth particularly pointing out that the scale 9 on the rod body 8 can facilitate the user to observe the specific adjustment distance;

specifically, when the segregation resistance testing device for the controllable low-strength soil-based mobile backfill material is used, the segregation resistance of the controllable low-strength soil-based mobile backfill material is effectively monitored through the cooperation among the cylinder 12, the partition plate 13 and the sample loading fastening bolt 14, the aggregate distribution characteristic can be evaluated, the segregation degree is judged, the basis is provided for adjusting the mixing proportion design and evaluating the construction quality, the bolt 1 is only installed before loading, then the partition plate is rotated for 90 degrees to completely open the cylinder mouth, the sample loading fastening bolt 14 is fastened again, the following sleeve operation is the same as that of the upper cylinder, the controllable low-strength soil-based mobile backfill material prepared during construction or in a laboratory is loaded into the material loading cylinder, the sample loading fastening bolt 14 is detached after being placed for 20 minutes before initial setting or 2 hours after sample loading, the sample loading fastening bolt 14 is pushed down, the handle 16 is pushed to rotate the partition plate 13 to completely shield the cylinder 12, and then the sample loading fastening bolt 14 and the partition plate sleeve fastening bolt 18 are installed, removing bolts 17, moving the bearing table, adjusting the height to be flush with the bottom surface of the upper cylinder, horizontally moving the upper cylinder to the bearing table, pushing the upper cylinder to a weighing platform scale area for weighing, removing the platform scale, moving an aggregate sleeve screen to the bearing table, pouring all materials in the upper cylinder into the uppermost screen, flushing the adhesive materials on the cylinder wall into the screen, performing screening analysis by a water washing method, operating the middle cylinder and the lower cylinder samples by the same operation method, rotating a separation plate to separate samples in the upper, middle and lower three-layer cylinders into upper, middle and lower three sections respectively after loading until a specified time, separating the material containing cylinder, fixing the separation plate and the material containing cylinder by bolts, translating the separation plate and the material containing cylinder to the height-adjustable bearing platform scale, performing water washing screening analysis after weighing the samples by the platform scale bearing box 7, judging distribution characteristics of the soil base fluidity backfilling materials by screening analysis, thereby judging the segregation resistance of the soil-based flowable backfill material.

It is noted that relational terms such as first and second, and the like are used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Moreover, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation. The term "comprising" an element defined by the term "comprising" does not exclude the presence of other identical elements in a process, method, article or apparatus that comprises the element.

In the present utility model, unless explicitly specified and limited otherwise, the terms "mounted," "configured," "connected," "secured," "screwed," and the like are to be construed broadly and may be, for example, fixedly connected, detachably connected, or integrally formed; can be mechanically or electrically connected; either directly or indirectly through intermediaries, or in communication with each other or in interaction with each other, unless explicitly defined otherwise, the meaning of the terms described above in this application will be understood by those of ordinary skill in the art in view of the specific circumstances.

Although embodiments of the present utility model have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made therein without departing from the principles and spirit of the utility model, the scope of which is defined in the appended claims and their equivalents.

Claims

1. The utility model provides a controllable low strength soil base mobility backfill material anti-segregation capability test device, includes bottom plate (1) and bench scale carrier box (7), its characterized in that: aggregate sleeve sieve (3) are installed at the top of bottom plate (1), four pillar (4) are installed at the top of bottom plate (1), the top of bench scale loading bin (7) is provided with water pipe (6), four the laminating of the top of pillar (4) has bench scale loading bin (7), baffle (5) are installed at the top of bench scale loading bin (7), the top of bottom plate (1) is provided with a plurality of barrels (12), and is a plurality of the inboard laminating of barrel (12) has division board (13), adjacent the inboard of barrel (12) is through moving appearance fastening bolt (15), installation appearance fastening bolt (14), bolt (17) and baffle sleeve fastening bolt (18) fixed connection.

2. The controllable low-strength soil-based flowable backfill material segregation resistance testing device of claim 1, wherein: a handle (16) is arranged below the isolation plate (13).

3. The controllable low-strength soil-based flowable backfill material segregation resistance testing device of claim 1, wherein: the four outer walls of the support columns (4) are fixedly connected with plate bodies (10), screw rods (11) are connected with inner threads of the plate bodies (10), and the upper parts of the outer walls of the screw rods (11) are connected with the bottom of the table scale bearing box (7) in a rotating mode through bearings.

4. A controllable low-strength soil-based flowable backfill material segregation resistance testing device as claimed in claim 3, wherein: the bottom of the screw rod (11) is provided with a handle (2).

5. A controllable low-strength soil-based flowable backfill material segregation resistance testing device as claimed in claim 3, wherein: the outer side of the rod body (8) is provided with scales (9).