CN112681301A - Method for quickly treating exposed anchor pulling bar of concrete structure - Google Patents
Method for quickly treating exposed anchor pulling bar of concrete structure Download PDFInfo
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- CN112681301A CN112681301A CN202011394608.9A CN202011394608A CN112681301A CN 112681301 A CN112681301 A CN 112681301A CN 202011394608 A CN202011394608 A CN 202011394608A CN 112681301 A CN112681301 A CN 112681301A
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- 239000004567 concrete Substances 0.000 title claims abstract description 94
- 238000000034 method Methods 0.000 title claims abstract description 28
- 238000005553 drilling Methods 0.000 claims abstract description 75
- 239000000463 material Substances 0.000 claims abstract description 13
- 238000004381 surface treatment Methods 0.000 claims description 8
- 238000004140 cleaning Methods 0.000 claims description 2
- 238000005507 spraying Methods 0.000 claims description 2
- 230000009286 beneficial effect Effects 0.000 abstract description 2
- 238000004904 shortening Methods 0.000 abstract 1
- 230000002787 reinforcement Effects 0.000 description 8
- 230000003014 reinforcing effect Effects 0.000 description 4
- 210000002435 tendon Anatomy 0.000 description 4
- 229910001294 Reinforcing steel Inorganic materials 0.000 description 3
- 238000009415 formwork Methods 0.000 description 3
- 229910000831 Steel Inorganic materials 0.000 description 2
- 239000010410 layer Substances 0.000 description 2
- 239000010959 steel Substances 0.000 description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 2
- VEXZGXHMUGYJMC-UHFFFAOYSA-M Chloride anion Chemical compound [Cl-] VEXZGXHMUGYJMC-UHFFFAOYSA-M 0.000 description 1
- 206010024796 Logorrhoea Diseases 0.000 description 1
- 239000010426 asphalt Substances 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 238000006073 displacement reaction Methods 0.000 description 1
- 238000001035 drying Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000002360 preparation method Methods 0.000 description 1
- 239000011241 protective layer Substances 0.000 description 1
- 230000036632 reaction speed Effects 0.000 description 1
- 239000011150 reinforced concrete Substances 0.000 description 1
- 239000011435 rock Substances 0.000 description 1
- 239000007921 spray Substances 0.000 description 1
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Abstract
The invention discloses a method for quickly processing a concrete structure outcrop anchor pulling bar, which comprises the following steps: step 1, determining drilling parameters; step 2, drilling holes on the surface of the concrete structure (1) according to the drilling parameters to form an annular cutting seam (2); step 3, taking out the concrete core in the annular joint-cutting seam (2), and forming a concave hole (3) in the surface of the concrete structure (1); step 4, cutting off the anchor pulling ribs (5) in the concave holes (3); and 5, filling backfill materials (4) into the concave hole (3). The method for quickly treating the concrete structure anchor pulling bar with the exposed head is beneficial to improving the treatment efficiency and treatment quality of the concrete structure anchor pulling bar, reducing the treatment cost, shortening the treatment period and obtaining good comprehensive benefits.
Description
Technical Field
The invention relates to a method for quickly treating an exposed anchor bar of a concrete structure.
Background
In the concrete structure construction of some tunnels, the formwork needs to use anchor pulling bars to fix the position, strengthen the strength of the formwork and control the displacement of the formwork during pouring; however, one end of the anchor pulling bar of the concrete structure is usually fixed on the surrounding rock, and the anchor pulling bar cannot be directly pulled out like a template anchor pulling bar of a pier or a shear wall, but needs to be cut; if not, one section of the anchor pulling bar is exposed in the air after the concrete is hardened, which is also a future water passing space, and the other section of the anchor pulling bar is buried in the concrete, even the lining reinforcing steel bar is in direct contact.
One section that exposes concrete surface draws anchor bar (reinforcing bar), if not processing, can influence the tunnel ability of overflowing on the one hand, on the other hand can be the material passageway that takes place the reinforcing bar and corrode well, in case the reinforcing bar takes place serious corrosion in the concrete, volume expansion can crowd the concrete around the garrulous reinforcing bar, and the concrete bond strength loses, and reinforced concrete structure will become invalid, will produce serious harm to lining cutting structure and even tunnel safety.
The traditional treatment method of the concrete structure outcrop anchor pulling bar is to cut off the concrete surface directly, and the method is suitable for the working conditions of low drying and chloride ion concentration and low structural importance, and the application environment is greatly limited.
Disclosure of Invention
In order to treat the anchor pulling reinforcing steel bars exposed on the surface of the concrete structure, the invention provides a method for quickly treating the anchor pulling reinforcing steel bars exposed on the surface of the concrete structure.
The technical scheme adopted by the invention for solving the technical problems is as follows: a method for quickly processing a concrete structure outcrop anchor pulling bar comprises the following steps:
and 5, filling backfill materials into the concave holes.
In step 1, the drilling parameters comprise drilling depth, drilling diameter, drilling position and included angle between the drilling central line and the surface of the concrete structure.
The drilling depth is 3-20 times of the diameter of the anchor pulling bar, the drilling diameter is 3-20 times of the diameter of the anchor pulling bar, the drilling position is that the included angle between the central line of the drilled hole and the axis of the anchor pulling bar is 0-10 degrees, and the drilled hole has no intersection with the main bar and the anchor pulling bar in the concrete structure.
In step 2, the drilling hole adopts a concrete core drilling machine.
The concrete core drilling machine is a handheld concrete core drilling machine, a drilling core drilling machine with a fixer or a wheel type concrete core drilling machine.
In step 2, the drilling hole gradually reaches the target depth by adopting a graded drilling mode.
The method also comprises the following steps before the step 1 or the step 2:
the outcrop part of the external pulling anchor bar of the concrete structure is cut off.
3.1, crushing the concrete core in the annular joint seam into concrete blocks;
and 3.2, taking out the concrete blocks in the annular cutting seams.
The method also comprises the following steps between the step 4 and the step 5:
and carrying out surface treatment on the inner surface of the concave hole and the end part of the truncated anchor pulling bar.
The surface treatment comprises the steps of firstly cleaning the inner surface of the concave hole and the outer surface of the end part of the anchor pulling bar, and secondly spraying a bonding material on the inner surface of the concave hole and the outer surface of the end part of the anchor pulling bar.
The invention has the beneficial effects that: the treatment efficiency and the treatment quality of the anchor bar pulling part of the concrete structure are improved, the treatment cost is reduced, the treatment period is shortened, and good comprehensive benefits are obtained.
Drawings
The accompanying drawings, which are incorporated in and constitute a part of this application, illustrate embodiments of the invention and, together with the description, serve to explain the invention and not to limit the invention.
Fig. 1 is a schematic view of an outcropping anchor bar of a concrete structure.
Figure 2 is a schematic illustration of drilling a hole in the surface of a concrete structure.
FIG. 3 is a schematic illustration of the annular slit after removal of the concrete core.
Fig. 4 is a schematic view of a tie-down bar in a truncated recess.
FIG. 5 is a schematic illustration of backfill completion.
Fig. 6 is a schematic view along the direction a in fig. 5.
Fig. 7 is a flow chart of a method for rapidly treating the outcrop anchor bars of the concrete structure.
1. A concrete structure; 2. cutting a seam in an annular shape; 3. concave holes; 4. backfilling; 5. pulling anchor bars; 6. and (7) bonding the layers.
Detailed Description
It should be noted that the embodiments and features of the embodiments in the present application may be combined with each other without conflict. The present invention will be described in detail below with reference to the embodiments with reference to the attached drawings.
A method for quickly processing a concrete structure outcrop anchor pulling bar comprises the following steps:
and 5, filling backfill 4 into the concave hole 3, as shown in the figures 1 to 7.
In step 1, the drilling parameters comprise drilling depth, drilling diameter, drilling position and included angle between the drilling central line and the surface of the concrete structure 1.
The drilling depth is 3-20 times of the diameter of the anchor pulling bar 5, and preferably the drilling depth is 8 times of the diameter of the anchor pulling bar 5. The drilling depth is less than the thickness of the concrete protective layer, and the drilling depth is generally not more than 4 times the diameter of the drilled hole, and preferably less than 3 times the diameter of the drilled hole.
The diameter of the drilled hole is 3-20 times of the diameter of the anchor pulling bar 5, and preferably the diameter of the drilled hole is 5-10 times of the diameter of the anchor pulling bar 5.
The drilling position should ensure that the exposed point of the anchor pulling bar 5 is in the circle of the drilled hole, the circle center of the anchor pulling bar 5 is coincided with the circle center of the drilled hole, the included angle between the central line of the drilled hole (namely the concave hole 3) and the axis of the anchor pulling bar 5 is 0-10 degrees, and preferably, the central line of the drilled hole (namely the concave hole 3) is coincided with the axis of the anchor pulling bar 5.
The drilling position needs to meet the condition that the drilled hole has no intersection with the main reinforcement and the anchor pulling reinforcement 5 in the concrete structure 1. I.e. the main tendons and tie-anchor tendons 5 in the concrete structure 1 are not drilled during the drilling process, so as to avoid damaging the main tendons and tie-anchor tendons 5 in the concrete structure 1.
In step 2, the drilling hole adopts a concrete core drilling machine. The concrete core drilling machine can be an existing handheld concrete core drilling machine, a drilling core drilling machine with a fixer or a wheel type concrete core drilling machine. The concrete core drilling machine needs to be installed before drilling, but the hand-held concrete core drilling machine does not need to be installed.
In the step 2, when the concrete core drilling machine drills to a specified depth, if the concrete core drilling machine cannot drill to the target depth due to the limitation of the length of the core taking device of the concrete core drilling machine, the drilling hole gradually reaches the target depth by adopting a grading drilling mode.
If the outcrop part of the anchor bars 5 outside the concrete structure 1 is too long to affect the drilling (for example, more than 3 times of the diameter of the anchor bars 5), the method further comprises the following steps before the step 1 or the step 2: the outcrop part of the external pulling anchor bar 5 of the concrete structure 1 is cut off.
3.1, crushing the concrete core in the annular joint cutting 2 into concrete blocks;
and 3.2, taking out the concrete block in the annular cutting seam 2.
In step 4, when the anchor pulling bar 5 in the concave hole 3 is cut off, the cut-off length of the anchor pulling bar 5 should meet the requirements of hydraulics and durability of the steel bar, for example, the length of the anchor pulling bar 5 in the concave hole 3 can be kept 1cm to 3cm finally.
The method also comprises the following steps between the step 4 and the step 5: the inner surface of the concave hole 3 and the end part of the truncated anchor pulling bar are subjected to surface treatment. The surface treatment should be performed according to the properties of the backfill 4 to ensure effective connection of the backfill 4 to the concrete structure.
The surface treatment is to firstly clean the inner surface of the concave hole 3 and the outer surface of the end part of the anchor pulling bar 5 to ensure that the inner surface of the concave hole 3 and the outer surface of the end part of the anchor pulling bar 5 are clean, secondly, the inner surface of the concave hole 3 and the outer surface of the end part of the anchor pulling bar 5 are sprayed with bonding materials to form a bonding layer 6, and the bonding materials can be asphalt.
The spray bonding material can also adopt Chinese patent document CN 106904928A, published on 2017, 6 and 30, and discloses a reaction speed controllable water-based capillary crystalline waterproof material, and a preparation method and application thereof.
In step 5, the backfill material 4 can be concrete, for example, the backfill material 4 can be concrete of the same material as the concrete structure 1. In step 5, the cavity 3 is filled with the backfill 4, and then cured for a set period of time, such as 14 days, until the strength of the backfill 4 is required.
If the space in the concave hole 3 allows reinforcement, reinforcement can be carried out in the concave hole 3 before the step 5, and the reinforced reinforcement is connected to the cut anchor pulling bar 5 to strengthen the strength of the backfill area. Namely, when the space in the concave hole 3 can be reinforced, the method can further comprise the following step before the step 5, the reinforcement is distributed in the concave hole 3, and the distributed steel bar and the cut anchor pulling bar 5 are connected and fixed. The reinforcement in the recess hole 3 is carried out after the surface treatment of the inner surface of the recess hole 3 and the end of the cut anchor pulling bar. The reinforcement must not expose the surface of the backfill 4.
The method for rapidly treating the outcrop anchor rod of the concrete structure should be carried out after the concrete structure 1 is hardened to a certain strength, for example, the designed strength is reached, for example, after 14 days of age.
The above description is only exemplary of the invention and should not be taken as limiting the scope of the invention, so that the invention is intended to cover all modifications and equivalents of the embodiments described herein. In addition, the technical features and the technical schemes, and the technical schemes can be freely combined and used.
Claims (10)
1. A method for quickly treating a concrete structure outcrop anchor bar is characterized by comprising the following steps:
step 1, determining drilling parameters;
step 2, drilling holes on the surface of the concrete structure (1) according to the drilling parameters to form an annular cutting seam (2);
step 3, taking out the concrete core in the annular joint-cutting seam (2), and forming a concave hole (3) in the surface of the concrete structure (1);
step 4, cutting off the anchor pulling ribs (5) in the concave holes (3);
and 5, filling backfill materials (4) into the concave hole (3).
2. The method for rapidly processing the outcrop anchor rod of the concrete structure according to the claim 1, wherein in the step 1, the drilling parameters comprise drilling depth, drilling diameter, drilling position and included angle of the drilling central line and the surface of the concrete structure (1).
3. The method for rapidly processing the outcrop anchor pulling bar of the concrete structure according to the claim 2, wherein the drilling depth is 3-20 times of the diameter of the anchor pulling bar (5), the drilling diameter is 3-20 times of the diameter of the anchor pulling bar (5), the drilling position is that the included angle between the central line of the drilled hole and the axis of the anchor pulling bar (5) is 0-10 degrees, and the drilled hole has no intersection with the main bar and the anchor pulling bar (5) in the concrete structure (1).
4. The method for rapidly processing the outcrop anchor rod of the concrete structure according to claim 1, wherein in the step 2, a concrete core drilling machine is adopted for the drilling.
5. The method for rapidly processing the outcrop anchor pulling bar of the concrete structure according to claim 4, wherein the concrete core drilling machine is a hand-held concrete core drilling machine, a drilling core drilling machine with a fixer or a wheel type concrete core drilling machine.
6. The method for rapidly processing the outcrop anchor rod of the concrete structure according to claim 1, wherein in the step 2, the drilling hole is gradually drilled to a target depth by adopting a graded drilling mode.
7. The method for rapidly processing the outcrop anchor rod of the concrete structure according to claim 1, which is characterized by further comprising the following steps before step 1 or step 2:
the exposed part of the external pulling anchor bar (5) of the concrete structure (1) is cut off.
8. The method for rapidly processing the outcrop anchor pulling bar of the concrete structure according to claim 1, wherein the step 3 comprises the following steps:
3.1, crushing the concrete core in the annular joint seam (2) into concrete blocks;
and 3.2, taking out the concrete blocks in the annular cutting seams (2).
9. The method for rapidly processing the outcrop anchor rod of the concrete structure according to claim 1, which further comprises the following steps between the step 4 and the step 5:
and (3) performing surface treatment on the inner surface of the concave hole (3) and the end part of the truncated anchor pulling rib (5).
10. The method for rapidly processing the outcrop anchor pulling bar of the concrete structure according to claim 9, wherein the surface treatment comprises firstly cleaning the inner surface of the concave hole (3) and the outer surface of the end part of the anchor pulling bar (5), and secondly spraying a bonding material on the inner surface of the concave hole (3) and the outer surface of the end part of the anchor pulling bar (5).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011394608.9A CN112681301A (en) | 2020-12-03 | 2020-12-03 | Method for quickly treating exposed anchor pulling bar of concrete structure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011394608.9A CN112681301A (en) | 2020-12-03 | 2020-12-03 | Method for quickly treating exposed anchor pulling bar of concrete structure |
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| Publication Number | Publication Date |
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| CN112681301A true CN112681301A (en) | 2021-04-20 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202011394608.9A Pending CN112681301A (en) | 2020-12-03 | 2020-12-03 | Method for quickly treating exposed anchor pulling bar of concrete structure |
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Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN206636223U (en) * | 2017-03-21 | 2017-11-14 | 中国建筑第六工程局有限公司 | A kind of processing structure of form tie |
| CN110984149A (en) * | 2019-12-02 | 2020-04-10 | 中建八局轨道交通建设有限公司 | Construction method for pile body pretreatment in shield pile grinding process |
-
2020
- 2020-12-03 CN CN202011394608.9A patent/CN112681301A/en active Pending
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN206636223U (en) * | 2017-03-21 | 2017-11-14 | 中国建筑第六工程局有限公司 | A kind of processing structure of form tie |
| CN110984149A (en) * | 2019-12-02 | 2020-04-10 | 中建八局轨道交通建设有限公司 | Construction method for pile body pretreatment in shield pile grinding process |
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Application publication date: 20210420 |