CN211057735U - Structure for mounting stress-free meter of face plate rock-fill dam - Google Patents
Structure for mounting stress-free meter of face plate rock-fill dam Download PDFInfo
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- CN211057735U CN211057735U CN201921753838.2U CN201921753838U CN211057735U CN 211057735 U CN211057735 U CN 211057735U CN 201921753838 U CN201921753838 U CN 201921753838U CN 211057735 U CN211057735 U CN 211057735U
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Abstract
The utility model provides a structure for installing a stress-free meter of a face plate rock-fill dam, which comprises a concrete face plate and a concrete block arranged on one side of the concrete face plate; a sleeve of a non-stress meter is embedded in the concrete block; a strain gauge is arranged in the stress-free meter sleeve, and a panel steel bar is arranged in the concrete panel; and the strain gauge is connected with a cable, and the cable is pulled to the measuring station along the panel steel bar. The utility model discloses simple structure through newly-increased concrete piece under the concrete panel, can install no stressmeter under the not enough condition of concrete panel thickness, records its free volume and warp.
Description
Technical Field
The utility model relates to a structure that is used for panel rock-fill dam not to have stress meter to install belongs to dam safety monitoring technical field.
Background
In stress-strain monitoring of concrete panels of concrete dams of panel rock-fill dams, a stress-free meter is commonly used and consists of a strain meter and a stress-free meter sleeve, wherein the strain meter is not required to be installed in the stress-free meter sleeve, the stress-free meter sleeve is not required to be embedded in the concrete panels during monitoring, and free volume deformation of concrete in a zero-stress state is measured.
The sleeve without the stressometer is a conical double-layer sleeve generally, the diameter is phi 200-phi 500, the concrete face plate of the face plate rock-fill dam is thin, the sleeve cannot be buried in the face plate due to insufficient space, or the concrete layer outside the sleeve is too thin after the sleeve is buried in the face plate with thick lower part, so that the structure is not good, and the observation result is influenced.
In the prior art, chinese patent publication No. 209147942 discloses a stress-free meter based on optical fiber sensing, which utilizes the stress-free meter to obtain reliable concrete self-generated volume deformation data; an isolated non-stressometer device disclosed in chinese patent publication No. 204007585, which can effectively isolate external forces and keep the concrete in the cylinder free to deform so that the measured free volume deformation is more accurate; the testing device and the mounting method of the moisture-insulating stress-free meter in the large-volume low-heat concrete disclosed in the Chinese patent with the publication number of 110006329 are used for researching the free volume deformation characteristic of the large-volume low-heat concrete in the moisture-insulating environment; therefore, the above patents cannot solve the problem of how to measure the free volume deformation of the concrete in the zero stress state by installing a stress-free gauge when the thickness of the concrete panel is insufficient.
SUMMERY OF THE UTILITY MODEL
In order to solve the technical problem, the utility model provides a structure for panel rock-fill dam does not have the installation of stressmeter, this a structure for panel rock-fill dam does not have the installation of stressmeter can install no stressmeter under the not enough condition of concrete panel thickness, measures the free volume deformation of concrete under the zero stress state.
The utility model discloses a following technical scheme can realize.
The utility model provides a structure for mounting a stress-free meter of a face plate rock-fill dam, which comprises a concrete face plate and a concrete block arranged on one side of the concrete face plate; a sleeve of a non-stress meter is embedded in the concrete block; a strain gauge is arranged in the stress-free meter sleeve, and a panel steel bar is arranged in the concrete panel; and the strain gauge is connected with a cable, and the cable is pulled to the measuring station along the panel steel bar.
And a wood cover plate is arranged between the concrete block and the concrete panel.
The strain gauge is fixed in the stress-free gauge sleeve through a lead wire stay wire.
The strain gauge is centrally disposed within the unstressed sleeve.
The length of the wood cover plate is larger than the maximum length of the concrete block.
And the wood cover plate is provided with a through hole for leading out a cable.
The beneficial effects of the utility model reside in that: simple structure through newly-increased concrete piece under the concrete panel, can install no stressmeter under the not enough condition of concrete panel thickness, records its free volume deformation.
Drawings
Fig. 1 is a schematic structural diagram of the present invention;
in the figure: 1-concrete block, 2-stress-free meter sleeve, 3-strain gauge, 4-lead wire stay wire, 5-cable, 6-wood cover plate, 7-panel steel bar and 8-concrete panel.
Detailed Description
The technical solution of the present invention is further described below, but the scope of the claimed invention is not limited to the described.
As shown in fig. 1, a structure for stress-free meter installation of a face-plate rock-fill dam comprises a concrete face plate 8 and a concrete block 1 arranged on one side of the concrete face plate 8; a stress-free meter sleeve 2 is embedded in the concrete block 1; the strain gauge 3 is arranged in the stress-free gauge sleeve 2, and the panel steel bar 7 is arranged in the concrete panel 8; and the strain gauge 3 is connected with a cable 5, and the cable 5 is pulled to a measuring station along a panel steel bar 7.
And a wood cover plate 6 is arranged between the concrete block 1 and the concrete panel 8.
The strain gauge 3 is fixed in the stress-free gauge sleeve 2 through a lead wire stay wire 4.
The strain gauge 3 is centrally located within the strain free gauge sleeve 2.
The length of the wooden cover plate 6 is larger than the maximum length of the concrete block 1.
And the wood cover plate 6 is provided with a through hole for leading out the cable 5.
Examples
As mentioned above, the structure for mounting the stress-free meter of the panel rock-fill dam is characterized in that the concrete block 1 is positioned at the lower part of the concrete panel 8 and made of the same material as the concrete panel 8, the stress-free meter sleeve 2 is embedded in the concrete block 1, the strain gauge 3 is fixed in the stress-free meter sleeve 2 through the lead wire stay wire 4, the cable 5 is pulled to a measuring station along the panel steel bar 7, and the concrete block 1 and the concrete panel 8 are isolated by the wood cover plate 6.
By adding the concrete block 1, a stress-free meter can be installed under the condition that the thickness of the concrete panel 8 is insufficient, and the free volume deformation of the concrete panel can be measured.
Further, the strain gauge 3 is installed in the stress-free meter sleeve 2 and firmly bound by the lead wire stay wire 4, the strain gauge 3 is centered vertically and horizontally in the stress-free meter sleeve 2, and one end of the cable 5 is upwards installed in the middle of the stress-free meter sleeve 2.
Furthermore, after the stress-free meter is installed, concrete can be poured into and around the stress-free meter sleeve 2, the concrete is compacted through manual vibration, and the concrete is the concrete with the same label and the same proportion as the concrete panel 8.
Further, after the casting is completed, the wooden cover plate 6 is covered, and attention should be paid to leading out the cable 5 from the wooden cover plate, and then the concrete panel 8 is cast.
Claims (6)
1. The utility model provides a structure that is used for panel rock-fill dam to have a stressometer to install, includes concrete panel (8) and sets up concrete block (1) in concrete panel (8) one side, its characterized in that: a stress-free meter sleeve (2) is embedded in the concrete block (1); a strain gauge (3) is arranged in the stress-free gauge sleeve (2), and a panel steel bar (7) is arranged in the concrete panel (8); and the strain gauge (3) is connected with a cable (5), and the cable (5) is pulled to the measuring station along the panel steel bar (7).
2. The structure for stress-free gauge mounting of face-plate rock-fill dams of claim 1, wherein: and a wood cover plate (6) is arranged between the concrete block (1) and the concrete panel (8).
3. The structure for stress-free gauge mounting of face-plate rock-fill dams of claim 1, wherein: the strain gauge (3) is fixed in the stress-free gauge sleeve (2) through a lead wire stay wire (4).
4. The structure for stress-free gauge mounting of face-plate rock-fill dams of claim 1, wherein: the strain gauge (3) is centrally arranged in the strain-free gauge sleeve (2).
5. The structure for stress-free gauge mounting of face-plate rock-fill dams of claim 2, wherein: the length of the wood cover plate (6) is larger than the maximum length of the concrete block (1).
6. The structure for stress-free gauge mounting of face-plate rock-fill dams of claim 2, wherein: and the wood cover plate (6) is provided with a through hole for leading out the cable (5).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921753838.2U CN211057735U (en) | 2019-10-18 | 2019-10-18 | Structure for mounting stress-free meter of face plate rock-fill dam |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921753838.2U CN211057735U (en) | 2019-10-18 | 2019-10-18 | Structure for mounting stress-free meter of face plate rock-fill dam |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN211057735U true CN211057735U (en) | 2020-07-21 |
Family
ID=71587741
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201921753838.2U Active CN211057735U (en) | 2019-10-18 | 2019-10-18 | Structure for mounting stress-free meter of face plate rock-fill dam |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN211057735U (en) |
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2019
- 2019-10-18 CN CN201921753838.2U patent/CN211057735U/en active Active
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