CN217651776U - Anti-floating anchor rod - Google Patents
Anti-floating anchor rod Download PDFInfo
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- CN217651776U CN217651776U CN202221076457.7U CN202221076457U CN217651776U CN 217651776 U CN217651776 U CN 217651776U CN 202221076457 U CN202221076457 U CN 202221076457U CN 217651776 U CN217651776 U CN 217651776U
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- anchor
- anchor rod
- pressure grouting
- floating
- grouting body
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- 239000000463 material Substances 0.000 claims abstract description 8
- 230000007704 transition Effects 0.000 claims description 11
- 239000007787 solid Substances 0.000 claims description 10
- 235000017166 Bambusa arundinacea Nutrition 0.000 claims description 4
- 235000017491 Bambusa tulda Nutrition 0.000 claims description 4
- 241001330002 Bambuseae Species 0.000 claims description 4
- 235000015334 Phyllostachys viridis Nutrition 0.000 claims description 4
- 239000011425 bamboo Substances 0.000 claims description 4
- 238000007569 slipcasting Methods 0.000 claims description 2
- 239000003673 groundwater Substances 0.000 abstract 1
- 210000003205 muscle Anatomy 0.000 abstract 1
- 239000011440 grout Substances 0.000 description 12
- 238000004873 anchoring Methods 0.000 description 10
- 238000010276 construction Methods 0.000 description 9
- 230000009471 action Effects 0.000 description 7
- 230000008901 benefit Effects 0.000 description 4
- 238000005260 corrosion Methods 0.000 description 4
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- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 4
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- 238000007906 compression Methods 0.000 description 3
- 238000000034 method Methods 0.000 description 3
- 230000008569 process Effects 0.000 description 3
- 239000002002 slurry Substances 0.000 description 3
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 2
- 229910001294 Reinforcing steel Inorganic materials 0.000 description 2
- 229910000831 Steel Inorganic materials 0.000 description 2
- 229910052799 carbon Inorganic materials 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 230000007774 longterm Effects 0.000 description 2
- 230000009467 reduction Effects 0.000 description 2
- 239000011435 rock Substances 0.000 description 2
- 239000002689 soil Substances 0.000 description 2
- 239000010959 steel Substances 0.000 description 2
- 238000012360 testing method Methods 0.000 description 2
- 238000013142 basic testing Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 150000001875 compounds Chemical class 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 239000002657 fibrous material Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000006386 neutralization reaction Methods 0.000 description 1
- 230000000149 penetrating effect Effects 0.000 description 1
- 238000011056 performance test Methods 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
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- Piles And Underground Anchors (AREA)
Abstract
The utility model relates to a building underground structure anti technical field that floats specifically indicates an anti stock that floats. The high-pressure grouting device comprises a high-pressure grouting body and an anchor plate, wherein the high-pressure grouting body is connected with the anchor plate, a plurality of anchor bars are arranged inside the high-pressure grouting body, the anchor bars are all connected with the anchor plate, and a grouting pipe is further arranged inside the high-pressure grouting body. The diameter of the anchor rod of the utility model can be greatly increased on the premise of using less grouting material, and the anti-buoyancy of the anchor rod can be greatly increased by checking according to actual use, so that the anti-buoyancy is greatly increased; the high-pressure grouting body in the anchor rod structure is changed from a tensioned state to a pressed state, and no crack is generated; the anchor rod structure is under the condition that prestressing force is not used, and groundwater can not get into the body of rod, has avoided the corruption of inside anchor muscle.
Description
Technical Field
The utility model relates to a building underground structure anti technical field that floats specifically indicates an anti stock that floats.
Background
The anti-floating anchor rod is a basement anti-floating rod piece system structure, and resists the whole floating of the basement structure through the anchoring force of the anchor rod body and the rock-soil body.
The anti-floating anchor rod is used as a tension member penetrating into the stratum, one end of the anti-floating anchor rod is connected with an engineering structure, and the other end of the anti-floating anchor rod penetrates into the stratum. Because the vertical stress characteristic of the anchor rod does not have the sliding surface of the slope anchor rod (no anchoring force exists in the sliding surface), the whole anchor rod can be effectively anchored with rock-soil bodies, and therefore the anti-floating anchor rod is not provided with a free section in the normal condition and is a full-bonding anchor rod. Because the bonding strength of the rod body reinforcing steel bar and the anchoring body is far greater than that of the anchoring body and the rock stratum, the part of the bonding section of the rod body reinforcing steel bar and the anchoring body of the full-bonding type anchor rod, which is greater than the designed tension value of the anti-floating anchor rod, is generally used as safety reserve, and is not fully utilized. Meanwhile, the tensile stress in the anchoring body of the common tension type full-bonding steel bar anti-floating anchor rod is higher, and the crack cannot be controlled.
Taking the Sichuan area as an example, the anti-floating anchor rods in the Sichuan area are generally solid anchor rods with the diameter of 150mm, and the anti-floating force of a single anchor rod is low, so that the use amount of the anchor rods is increased easily, and the cost investment is large; and according to the national standard JGJ476-2019 construction engineering anti-floating technical standard, a new requirement is provided for controlling the cracks of the anchor rod, and because the slurry of the rod body of the traditional anchor rod is pulled, the requirement cannot be met frequently, and prestress needs to be increased, but the construction of the prestressed anchor rod is complex, the cost is obviously increased, and the anchor rod is a pain point in the industry and the market.
In view of the above, a need exists for a bolt that can greatly increase the buoyancy resistance with less grout.
Disclosure of Invention
An object of the utility model is to provide an anti-floating anchor for increase anti buoyancy by a wide margin under the condition of less grout body.
The utility model discloses a following technical scheme realizes:
an anti-floating anchor rod which is characterized in that: the high-pressure grouting structure comprises a high-pressure grouting body and an anchor plate, wherein the high-pressure grouting body is connected with the anchor plate, a plurality of anchor bars are arranged inside the high-pressure grouting body, the anchor bars are all connected with the anchor plate, and a grouting pipe is further arranged inside the high-pressure grouting body. In the prior art, anti-floating anchor rods in Sichuan areas are generally solid anchor rods with the diameter of 150mm, and the anti-floating force of a single anchor rod is low, so that the use amount of the anchor rods is increased easily, and the cost investment is large; and according to the national standard JGJ476-2019 construction engineering anti-floating technical standard, a new requirement is required for controlling the cracks of the anchor rod, and because slurry of the traditional anchor rod body is pulled, the requirement cannot be met frequently, and prestress needs to be increased, but the construction of the prestressed anchor rod is complex, the cost is obviously increased, and the anchor rod is a pain point in the industry and the market. In view of the above problems, the applicant proposes an anti-floating anchor rod, specifically, the anchor rod is provided with a high-pressure grouting body and an anchor plate, the anchor plate and an anchor bar are integrally formed, and a grouting pipe is further arranged inside the high-pressure grouting body. The diameter of the anchor rod based on the structure can be greatly increased on the premise of using less grouting material, and the anti-buoyancy force of the anchor rod can be greatly increased by checking according to actual use, so that the anti-buoyancy force is greatly increased.
Further, the high-pressure grout body comprises a filling section, a transition section and a solid section which are arranged from top to bottom. In order to meet the control requirement of the anchor rod crack, prestress needs to be increased, but the traditional anchor rod cannot meet the requirement, if a prestressed anchor rod with large prestress is adopted, the construction process is complex, the cost is obviously increased, and the prestressed anchor rod also becomes a pain point in the industry and the market. In view of this, the applicant sets the high-pressure grouting body into three parts from top to bottom, and changes the stress condition of the traditional anchor rod through the transition section, and changes the original tension into compression, thereby avoiding the generation of cracks to a great extent. The cross-sectional shape of the transition section is preferably inverted conical.
Further, the filling section is filled with a light material. It should be noted that the filling section and the transition section inside the high-pressure grouting body adopt a light filling mode, so that underground water cannot enter the anchor rod body under the condition of not using prestress, and corrosion of anchor bars is avoided.
Furthermore, the filling section is filled with bamboo joints.
Preferably, the number of the anchor bars is 4-10, and the anchor bars are distributed in a circumferential array by taking the axis of the high-pressure grouting body as a reference. It should be noted that the number of the anchor bars is only one of the preferable choices of the present invention. And under the certain prerequisite of high pressure grout body diameter, the quantity and the diameter of dowel are the negative correlation, the quantity increase of dowel promptly, the diameter of dowel needs corresponding reduction, from the atress and the prestressing force direction analysis of dowel, the utility model discloses the efficiency that can realize obviously is superior to the conventional selection among the prior art, has gained better technological effect. It should be further noted that the bearing capacity resultant force action point of the anchoring system and the upper anti-floating load action point need to be coincident, so that the anchor bars are distributed in a circumferential array by taking the axis of the high-pressure grouting body as a reference, and the optimal number of the anchor bars is 4-10 through long-term actual tests.
Compared with the prior art, the utility model, following advantage and beneficial effect have:
1. the diameter of the anchor rod of the utility model can be greatly increased on the premise of using less grouting material, and the anti-floating force of the anchor rod can be greatly increased by checking according to actual use, so that the anti-floating force is greatly increased;
2. the high-pressure grouting body in the anchor rod structure of the utility model is changed from a tension state to a compression state, and no crack is generated;
3. the anchor rod structure of the utility model has the advantages that under the condition of not using prestress, underground water can not enter the rod body, thereby avoiding the corrosion of the inner anchor bars;
4. the utility model discloses use the bamboo joint in filling the section to realize solid carbon process, finally make an effort towards the direction of carbon neutralization.
Drawings
The accompanying drawings, which are included to provide a further understanding of the embodiments of the invention and are incorporated in and constitute a part of this application, illustrate embodiment(s) of the invention and together with the description serve to explain the principles of the invention. In the drawings:
FIG. 1 is a schematic view of the structure of embodiment 1;
FIG. 2 is a schematic view of the structure of the anchor plate and the anchor bars;
FIG. 3 is a schematic structural view of embodiment 3;
FIG. 4 is a cross-sectional view of a high pressure grout body.
Reference numbers and corresponding part names in the figures:
1-high pressure grouting body, 11-filling section, 12-transition section, 13-solid section, 2-anchor plate, 3-anchor bar and 4-grouting pipe.
Detailed Description
To make the objects, technical solutions and advantages of the present invention more apparent, the present invention is further described in detail below with reference to the following examples and drawings, and the exemplary embodiments and descriptions thereof of the present invention are only used for explaining the present invention, and are not intended as limitations of the present invention. It should be noted that the present invention is already in practical development and use stage.
Example 1:
as shown in fig. 1-2, the anti-floating anchor rod comprises a high-pressure grouting body 1 and an anchor plate 2, wherein the high-pressure grouting body 1 is connected with the anchor plate 2, a plurality of anchor ribs 3 are arranged inside the high-pressure grouting body 1, the anchor ribs 3 are all connected with the anchor plate 2, and a grouting pipe 4 is further arranged inside the high-pressure grouting body 1. The high-pressure grouting body 1 comprises a filling section 11, a transition section 12 and a solid section 13 which are arranged from top to bottom. The filling section 11 is filled with a light material. The number of the anchor bars 3 is 4-10, and the anchor bars 3 are distributed in a circumferential array by taking the axis of the high-pressure grouting body 1 as a reference.
In the prior art, anti-floating anchor rods in Sichuan areas are generally solid anchor rods with the diameter of 150mm, and the anti-floating force of a single anchor rod is low, so that the use amount of the anchor rods is increased easily, and the cost investment is large; and according to the national standard JGJ476-2019 construction engineering anti-floating technical standard, a new requirement is required for controlling the cracks of the anchor rod, and because slurry of the traditional anchor rod body is pulled, the requirement cannot be met frequently, and prestress needs to be increased, but the construction of the prestressed anchor rod is complex, the cost is obviously increased, and the anchor rod is a pain point in the industry and the market. In view of the above problems, the applicant proposes an anti-floating anchor rod, specifically, by arranging the anchor rod as two parts of a high-pressure grouting body 1 and an anchor plate 2, and connecting the anchor plate 2 with an anchor bar 3, a grouting pipe 4 is further arranged inside the high-pressure grouting body 1. The diameter of the anchor rod based on the structure can be greatly increased on the premise of using less grouting material, and the anti-buoyancy force of the anchor rod can be greatly increased by checking according to actual use, so that the anti-buoyancy force is greatly increased. The anchor bars 3 include, but are not limited to, steel bars, and preferably also fiber materials.
It should be noted that, in order to meet the requirement of controlling the cracks of the anchor rod, the prestress needs to be added, but the traditional anchor rod cannot meet the requirement, if the prestressed anchor rod with large prestress is adopted, the construction process is complex, the cost is obviously increased, and the prestressed anchor rod also becomes a pain point in the industry and the market. In view of this, the applicant sets the high-pressure grout 1 into three parts from top to bottom, and changes the stress condition of the traditional anchor rod through the transition section 12, and the original tension is changed into compression, so that the generation of cracks is avoided to the greatest extent. The cross-sectional shape of the transition section 12 is preferably inverted conical. It should be further noted that the filling section 11 and the transition section 12 inside the high-pressure grouting body 1 are filled in a light weight manner, so that underground water cannot enter the anchor rod body under the condition of no prestress, and corrosion of the anchor bar 3 is avoided.
Example 2:
the utility model provides an anti-floating anchor rod, includes high-pressure grout body 1 and anchor slab 2, high-pressure grout body 1 with anchor slab 2 is connected, the inside of high-pressure grout body 1 is provided with a plurality of anchor bars 3, and is a plurality of anchor bar 3 all with anchor slab 2 connects, the inside of high-pressure grout body 1 still is provided with slip casting pipe 4. The high-pressure grouting body 1 comprises a filling section 11, a transition section 12 and a solid section 13 which are arranged from top to bottom. And bamboo joints are filled in the filling section 11. The number of the anchor bars 3 is 4-10, and the anchor bars 3 are distributed in a circumferential array by taking the axis of the high-pressure grouting body 1 as a reference.
Example 3;
as shown in fig. 3 to 4, the anti-floating anchor rod comprises a high-pressure grouting body 1 and an anchor plate 2, wherein the high-pressure grouting body 1 is connected with the anchor plate 2, a plurality of anchor ribs 3 are arranged inside the high-pressure grouting body 1, the anchor ribs 3 are all connected with the anchor plate 2, and a grouting pipe 4 is further arranged inside the high-pressure grouting body 1. The high-pressure grouting body 1 comprises a filling section 11, a transition section 12 and a solid section 13 which are arranged from top to bottom. The number of the anchor bars 3 is 4-10, and the anchor bars 3 are distributed in a circumferential array by taking the axis of the high-pressure grouting body 1 as a reference.
It should be noted that the number of anchor bars 3 is only one of the preferred options of the present invention. And under the certain prerequisite of high pressure grout body 1 diameter, the quantity and the diameter of dowel 3 are the negative correlation, and the quantity of dowel 3 increases promptly, and the diameter of dowel 3 needs corresponding reduction, from the atress and the prestressing force direction analysis of dowel 3, the utility model discloses the efficiency that can realize is obviously superior to the conventional selection among the prior art, has gained better technological effect. It should be further noted that the bearing capacity resultant force action point of the anchoring system and the upper anti-floating load action point need to be coincident, so that the anchor bars 3 are distributed in a circumferential array by taking the axis of the high-pressure grouting body 1 as a reference, and the optimal number of the anchor bars 3 is 4-10 through long-term actual tests.
More specifically, the anchor body bearing capacity resultant force action point needs to coincide with upper portion anti floating load action point, and stock anchor body length should be confirmed by the performance test, can calculate according to the following formula when tentatively designing:
in the formula (I), the compound is shown in the specification,
l is the anchor length (m);
n is a standard load value (KN) borne by the anchor rod under the action basic combination condition;
k is the anti-pulling safety coefficient of the anchoring body, and is preferably 2.0;
f is a standard value of the bonding strength between the anchoring body and the rock stratum and is determined by basic tests;
d is the anchor diameter (mm);
ℇ is the empirical coefficient, taken as 0.8.
Based on the above formula, in the case that the diameter cannot be increased, the anti-floating bearing capacity is limited, so that the length or the number of the anchor rods is increased, namely, the situation is not in accordance with the construction expectation. After the anchor rod structure with the structure is adopted, the diameter of the anchor rod body can be greatly increased on the premise of less grouting material, the anti-buoyancy force of the anchor rod can be greatly increased according to a calculation formula, and the anti-buoyancy force is greatly increased; furthermore, by using the structure, the grout body is changed into pressed form from original tension, so that cracks are avoided, further, under the condition that prestress is not used, underground water cannot enter the rod body, and corrosion of the rib body is avoided.
The above-mentioned embodiments, further detailed description of the objects, technical solutions and advantages of the present invention, it should be understood that the above description is only the embodiments of the present invention, and is not intended to limit the scope of the present invention, and any modifications, equivalent substitutions, improvements, etc. made within the spirit and principle of the present invention should be included in the scope of the present invention.
Claims (5)
1. An anti-floating anchor rod which is characterized in that: including high-pressure grouting body (1) and anchor slab (2), high-pressure grouting body (1) with anchor slab (2) are connected, the inside of high-pressure grouting body (1) is provided with a plurality of anchor bars (3), and is a plurality of anchor bar (3) all with anchor slab (2) are connected, the inside of high-pressure grouting body (1) still is provided with slip casting pipe (4).
2. An anti-floating anchor according to claim 1, wherein: the high-pressure grouting body (1) comprises a filling section (11), a transition section (12) and a solid section (13) which are arranged from top to bottom.
3. An anti-floating anchor according to claim 2, wherein: the filling section (11) is filled with a light material.
4. An anti-floating anchor according to claim 3, wherein: bamboo joints are filled in the filling section (11).
5. An anti-floating anchor according to any one of claims 1~4, in which: the number of the anchor bars (3) is 4-10, and the anchor bars (3) are distributed in a circumferential array by taking the axis of the high-pressure grouting body (1) as a reference.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202221076457.7U CN217651776U (en) | 2022-05-07 | 2022-05-07 | Anti-floating anchor rod |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202221076457.7U CN217651776U (en) | 2022-05-07 | 2022-05-07 | Anti-floating anchor rod |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN217651776U true CN217651776U (en) | 2022-10-25 |
Family
ID=83663414
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202221076457.7U Active CN217651776U (en) | 2022-05-07 | 2022-05-07 | Anti-floating anchor rod |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN217651776U (en) |
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2022
- 2022-05-07 CN CN202221076457.7U patent/CN217651776U/en active Active
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Effective date of registration: 20231208 Address after: No. 19 Zhuoyue Road, Longxing Town, Liangjiang New Area, Yubei District, Chongqing, 400000 (cluster registration) Patentee after: Chongqing Xiaoyao Technology Co.,Ltd. Address before: No. 105, 1st Floor, Unit 3, Building 3, No. 69, Zhengtongshun Street, Qingyang District, Chengdu, Sichuan 610000 Patentee before: Wang Longquan |