CN210828420U - Grouting device suitable for grouting reinforced concrete drawing test - Google Patents
Grouting device suitable for grouting reinforced concrete drawing test Download PDFInfo
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- CN210828420U CN210828420U CN201920893396.5U CN201920893396U CN210828420U CN 210828420 U CN210828420 U CN 210828420U CN 201920893396 U CN201920893396 U CN 201920893396U CN 210828420 U CN210828420 U CN 210828420U
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Abstract
The utility model discloses a grouting device suitable for a grouting reinforced concrete drawing test, which comprises a cross-shaped support, a conical support and a grouting device, wherein the cross-shaped support comprises a cross rod and a vertical rod which runs through the cross rod, the vertical rod is of a hollow structure and is sleeved on the upper part of a reinforcing steel bar, and the cross rod is positioned at the top of the concrete and used for fixing the vertical rod; the conical support is arranged at the lower part of the steel bar, and the bottom surface of the conical support is contacted with the bottom surface of the concrete; and a grouting opening is formed in the side wall of the conical support and used for a grouting pipe of a grouting device to insert. The grouting device is simple and reliable in structure, the unbonded section is not interfered by grouting, the diameter of the grouting pipe can not be changed due to the change of the thickness of the annular crack, and the grouting device is convenient and fast.
Description
Technical Field
The utility model relates to a slip casting device suitable for slip casting reinforced concrete draws experiment, and specifically speaking uses the annular crack between reinforcing bar and concrete perforating hole to carry out the device of slip casting.
Background
Under the action of long-term wind load and the like of a wind turbine foundation, damage is accumulated locally between a foundation ring and foundation concrete, so that the anchoring failure of the concrete to the foundation ring is caused, a visible separation crack appears between the foundation ring and the concrete, a cavity appears in the concrete at a flange at the bottom of the foundation ring, the foundation rigidity is reduced, the tower frequency is reduced, and the normal operation of the wind turbine is possibly influenced. The pressure grouting is that the slurry capable of being solidified is injected into cracks or pores by utilizing air pressure or hydraulic pressure, the slurry drives air and moisture in the cracks or the pores in the modes of filling, permeating, compacting and the like, and then the positions of the cracks or the pores are filled, and the aims of strengthening and seepage prevention are achieved after the slurry is solidified.
For the research on the grouting reinforcement effect of the fan foundation, the influences of factors such as seam width, temperature and humidity need to be considered, and the field test is high in cost and difficult to develop. In order to solve the problems, a smooth steel bar is used for simulating a foundation ring, and after a gap is reserved between the smooth steel bar and a concrete block for grouting, a drawing test is carried out and the test result is analyzed. And current slip casting device is mostly to underground works, can't satisfy the research to basic ring and concrete and thick liquid interface bonding effect, can't solve to draw in the experiment the reinforcing bar location between two parties, set up the non-bonding section scheduling problem.
A common top-down grouting method for fan foundation grouting reinforcement engineering is characterized in that an unbonded section is required to be arranged in a grouting reinforcement drawing test, when the top-down grouting method is adopted, firstly, grout can pass through the unbonded section, the interface of the bonded section and the unbonded section cannot be controlled at a specified position, secondly, a test crack is annular, and when the crack width is in a millimeter level, a conventional grouting pipe cannot be inserted for grouting.
Based on the analysis, in order to overcome the defects of the existing grouting mode, the scheme is generated.
SUMMERY OF THE UTILITY MODEL
The utility model aims at providing a slip casting device suitable for slip casting reinforced concrete draws experiment, its simple structure is reliable, and unbonded section does not receive the slip casting to disturb, and the slip casting pipe diameter can not change convenient and fast because of annular crack thickness change.
In order to achieve the above purpose, the solution of the present invention is:
a grouting device suitable for a grouting reinforced concrete drawing test comprises a cross-shaped support, a conical support and a grouting device, wherein the cross-shaped support comprises a cross rod and a vertical rod penetrating through the cross rod, the vertical rod is of a hollow structure and penetrates through the upper part of a reinforcing steel bar, and the cross rod is positioned at the top of concrete and used for fixing the vertical rod; the conical support is arranged at the lower part of the steel bar, and the bottom surface of the conical support is contacted with the bottom surface of the concrete; and a grouting opening is formed in the side wall of the conical support and used for a grouting pipe of a grouting device to insert.
The length of the vertical rod and the steel bar is 5 times of the diameter of the steel bar.
The contact position of the conical support and the steel bar is provided with a rubber ring.
The gap between the conical support and the concrete is sealed by magnesium carbonate cement.
After the scheme is adopted, compared with the prior art, the utility model, its advantage lies in:
(1) compare in traditional slip casting device, the utility model discloses mainly consolidate the analogue test of effect to fan foundation slip casting, slip casting reinforced concrete draws the experiment promptly. The conical supports and the cross-shaped support can fix the reinforcing steel bars, so that the reinforcing steel bars are positioned in the center of the concrete, the test precision is improved, and grouting operation is facilitated;
(2) the utility model adopts the bottom-to-top grouting, the cross support seals the upper half part of the reinforcing steel bar, and the grout passes through the unbonded section when avoiding grouting, thereby being beneficial to accurately setting the unbonded section required by the drawing test, reducing the bubbles generated in the grouting process and improving the grouting quality;
(3) the utility model adopts the structure that the grouting opening is arranged on the side wall of the conical support, the diameter of the grouting pipe is not influenced by the seam width, and the grouting can be carried out on the millimeter-level annular crack, thereby simplifying the test equipment;
(4) the utility model discloses the installation is simple, easily effectively fixes labour saving and time saving.
Drawings
FIG. 1 is a cross-sectional view of a grouting device of the present invention;
fig. 2 and fig. 3 are schematic plan views of the grouting device of the present invention.
Detailed Description
The technical solution and the advantages of the present invention will be described in detail with reference to the accompanying drawings.
As shown in fig. 1 to 3, the utility model provides a slip casting device suitable for slip casting reinforced concrete draws experiment for realize keeping somewhere the seam slip casting between reinforcing bar 1 and concrete 3, including cross support 2, toper support 4, slip casting ware and rubber ring 6, wherein, reinforcing bar 1, concrete 3 are the test piece main part, and reinforcing bar 1 inserts concrete 3's perforating hole center, and leaves annular crack between reinforcing bar 1 and concrete 3 perforating hole.
The cross support 2 is sleeved on the upper part of the steel bar 1 in a penetrating manner and comprises a vertical bar for forming an unbonded section and a cross bar for fixing the vertical bar, wherein the vertical bar is of a hollow structure and is used for inserting the steel bar so as to play a positioning role, the vertical bar penetrates through the cross bar, and the coincidence length of the vertical bar and the steel bar (namely the length of the unbonded section) is 5 times of the diameter of the steel bar; through cooperating cross support 2 and reinforcing bar 1, play fixed reinforcing bar 1, set up the effect on unbonded section and sealed slip casting passageway top to take out after the slip casting is accomplished.
The conical support 4 is installed in 1 lower part of reinforcing bar, plays the effect of supporting the location, is fixed in 3 perforating hole centers of concrete with reinforcing bar 1, and the conical support 4 is provided with rubber circle 6 with 1 contact department of reinforcing bar, and the space between conical support 4 and the concrete 3 is then sealed with magnesium carbonate cement, plays the effect of closed slip casting environment.
The side wall of the conical support 4 is provided with a grouting opening for inserting a grouting pipe 5 of a grouting device, so that grouting from bottom to top is realized, and the grouting pipe opening does not exceed the liquid level of the grout in the grouting process, thereby reducing the generation of bubbles and improving the grouting quality.
In this embodiment, the side length of the cubic block presented by the concrete is 10 times of the diameter of the steel bar, the length of the unbonded section is 5 times of the diameter of the steel bar, the distance between the upper surface of the steel bar and the upper surface of the concrete cube is not less than 300mm, and the distance between the lower surface of the steel bar and the lower surface of the cubic block is not less than 50 mm.
Based on the utility model discloses a slip casting method, including following step:
and 5, curing until the slurry is cured, taking out the cross bracket 2 and removing surface residues.
Above embodiment only is for explaining the utility model discloses a technical thought can not be injectd with this the utility model discloses a protection scope, all according to the utility model provides a technical thought, any change of doing on technical scheme basis all falls into the utility model discloses within the protection scope.
Claims (4)
1. The utility model provides a slip casting device suitable for slip casting reinforced concrete draws experiment which characterized in that: the concrete grouting device comprises a cross support, a conical support and a grouting device, wherein the cross support comprises a cross rod and a vertical rod penetrating through the cross rod, the vertical rod is of a hollow structure and penetrates through the upper part of a steel bar, and the cross rod is positioned at the top of concrete and used for fixing the vertical rod; the conical support is arranged at the lower part of the steel bar, and the bottom surface of the conical support is contacted with the bottom surface of the concrete; and a grouting opening is formed in the side wall of the conical support and used for a grouting pipe of a grouting device to insert.
2. The grouting device suitable for the grouting reinforced concrete drawing test as claimed in claim 1, wherein: the length of the vertical rod and the steel bar is 5 times of the diameter of the steel bar.
3. The grouting device suitable for the grouting reinforced concrete drawing test as claimed in claim 1, wherein: and a rubber ring is arranged at the contact position of the conical support and the steel bar.
4. The grouting device suitable for the grouting reinforced concrete drawing test as claimed in claim 1, wherein: and a gap between the conical support and the concrete is sealed by magnesium carbonate cement.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920893396.5U CN210828420U (en) | 2019-06-14 | 2019-06-14 | Grouting device suitable for grouting reinforced concrete drawing test |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920893396.5U CN210828420U (en) | 2019-06-14 | 2019-06-14 | Grouting device suitable for grouting reinforced concrete drawing test |
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| Publication Number | Publication Date |
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| CN210828420U true CN210828420U (en) | 2020-06-23 |
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| CN201920893396.5U Active CN210828420U (en) | 2019-06-14 | 2019-06-14 | Grouting device suitable for grouting reinforced concrete drawing test |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110344602A (en) * | 2019-06-14 | 2019-10-18 | 河海大学 | Grouting device and grouting method suitable for slip casting armored concrete pull-out test |
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2019
- 2019-06-14 CN CN201920893396.5U patent/CN210828420U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110344602A (en) * | 2019-06-14 | 2019-10-18 | 河海大学 | Grouting device and grouting method suitable for slip casting armored concrete pull-out test |
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