CN113338351A - Anticorrosive durable device of prestressing force - Google Patents
Anticorrosive durable device of prestressing force Download PDFInfo
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- CN113338351A CN113338351A CN202110783593.3A CN202110783593A CN113338351A CN 113338351 A CN113338351 A CN 113338351A CN 202110783593 A CN202110783593 A CN 202110783593A CN 113338351 A CN113338351 A CN 113338351A
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- prestressed
- prestressed steel
- steel strand
- fixing piece
- grouting
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- 229910000831 Steel Inorganic materials 0.000 claims abstract description 131
- 239000010959 steel Substances 0.000 claims abstract description 131
- 238000005260 corrosion Methods 0.000 claims abstract description 24
- 238000005553 drilling Methods 0.000 claims abstract description 17
- 230000007797 corrosion Effects 0.000 claims abstract description 14
- 238000003780 insertion Methods 0.000 claims abstract description 4
- 230000037431 insertion Effects 0.000 claims abstract description 4
- 230000001681 protective effect Effects 0.000 claims description 40
- 238000007789 sealing Methods 0.000 claims description 19
- 238000007569 slipcasting Methods 0.000 claims description 19
- 239000011440 grout Substances 0.000 claims description 16
- 210000003205 muscle Anatomy 0.000 claims description 16
- 238000004873 anchoring Methods 0.000 claims description 10
- 230000000149 penetrating effect Effects 0.000 claims description 3
- 238000005266 casting Methods 0.000 abstract description 4
- 238000000034 method Methods 0.000 description 21
- 238000007667 floating Methods 0.000 description 5
- 235000017166 Bambusa arundinacea Nutrition 0.000 description 4
- 235000017491 Bambusa tulda Nutrition 0.000 description 4
- 241001330002 Bambuseae Species 0.000 description 4
- 235000015334 Phyllostachys viridis Nutrition 0.000 description 4
- 239000011425 bamboo Substances 0.000 description 4
- 238000010276 construction Methods 0.000 description 4
- 239000007788 liquid Substances 0.000 description 4
- 239000002131 composite material Substances 0.000 description 2
- 230000002035 prolonged effect Effects 0.000 description 2
- 230000002441 reversible effect Effects 0.000 description 2
- 238000007493 shaping process Methods 0.000 description 2
- 239000010802 sludge Substances 0.000 description 2
- 239000002689 soil Substances 0.000 description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 2
- 229910001294 Reinforcing steel Inorganic materials 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 239000006185 dispersion Substances 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000003673 groundwater Substances 0.000 description 1
- 238000002347 injection Methods 0.000 description 1
- 239000007924 injection Substances 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 230000002787 reinforcement Effects 0.000 description 1
- 239000011435 rock Substances 0.000 description 1
- 239000010865 sewage Substances 0.000 description 1
- 239000000243 solution Substances 0.000 description 1
- 238000003466 welding Methods 0.000 description 1
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D31/00—Protective arrangements for foundations or foundation structures; Ground foundation measures for protecting the soil or the subsoil water, e.g. preventing or counteracting oil pollution
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D31/00—Protective arrangements for foundations or foundation structures; Ground foundation measures for protecting the soil or the subsoil water, e.g. preventing or counteracting oil pollution
- E02D31/06—Protective arrangements for foundations or foundation structures; Ground foundation measures for protecting the soil or the subsoil water, e.g. preventing or counteracting oil pollution against corrosion by soil or water
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D31/00—Protective arrangements for foundations or foundation structures; Ground foundation measures for protecting the soil or the subsoil water, e.g. preventing or counteracting oil pollution
- E02D31/10—Protective arrangements for foundations or foundation structures; Ground foundation measures for protecting the soil or the subsoil water, e.g. preventing or counteracting oil pollution against soil pressure or hydraulic pressure
- E02D31/12—Protective arrangements for foundations or foundation structures; Ground foundation measures for protecting the soil or the subsoil water, e.g. preventing or counteracting oil pollution against soil pressure or hydraulic pressure against upward hydraulic pressure
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D5/00—Bulkheads, piles, or other structural elements specially adapted to foundation engineering
- E02D5/74—Means for anchoring structural elements or bulkheads
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- Engineering & Computer Science (AREA)
- Life Sciences & Earth Sciences (AREA)
- Structural Engineering (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Mining & Mineral Resources (AREA)
- Paleontology (AREA)
- Civil Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Environmental & Geological Engineering (AREA)
- Hydrology & Water Resources (AREA)
- Piles And Underground Anchors (AREA)
Abstract
The invention belongs to the technical field of geotechnical engineering, and particularly relates to a prestress anti-corrosion durable device, which comprises: pre-stressed steel strands; the outer sleeve is used for wrapping the prestressed steel strand; the grouting pipe is positioned in the middle of the prestressed steel strand; positioning the bracket; the fixing device is provided with a first fixing piece and a second fixing piece, wherein the first fixing piece is used for tensioning and locking the upper end of the prestressed steel strand, the second fixing piece is used for tensioning and locking the lower end of the prestressed steel strand, and the second fixing piece is provided with a bearing body for improving the bearing strength; grouting, namely grouting the anchor rod borehole through a grouting pipe, and casting the inner side and the outer side of the prestressed steel strand into an integral cylindrical column; and the guiding device is used for protecting the second fixing piece and guiding when the second fixing piece is embedded into the anchor rod drilling hole. The guiding device can facilitate the quick insertion of the prestressed steel strand and the grouting pipe into the ground, and can protect the second fixing piece so as to avoid the corrosion of the second fixing piece.
Description
Technical Field
The invention belongs to the technical field of geotechnical engineering, and particularly relates to a prestress corrosion-resistant durable device.
Background
The anchor rod is a structure commonly used in geotechnical engineering, is a tension member anchored in the ground and a system thereof, and is used for transmitting the load of an external structure into the ground so as to keep the external structure stable.
The invention discloses a Chinese patent with publication number CN104805837B, which discloses a pipe seam grouting composite anchor rod body, wherein after the pipe seam grouting composite anchor rod body is supported for one time, secondary rock and soil grouting reinforcement is carried out in the later period and is also used as a grouting pipe or a grouting pipe anchor rod, and a new grouting hole is not required to be newly drilled, and a new grouting pipe or a new grouting pipe anchor rod is not required to be processed and installed, so that the purposes of reducing construction links, simple process and reducing workload are achieved, however, the lower end of the anchor rod is easily corroded after a long time because stratum water and soil are corrosive to the anchor rod body.
Disclosure of Invention
The invention aims to solve the technical problems, and provides a prestress anti-corrosion durable device which has higher pulling resistance and floating resistance after being applied to the ground, can improve the overall strength of the construction ground, and further improves the endurance life due to higher corrosion resistance.
The purpose of the invention is realized as follows: a prestressed corrosion-resistant durable device comprising:
the prestressed steel strands are vertically arranged, and more than two prestressed steel strands are distributed in the circumferential direction;
the grouting pipe is vertically arranged and is positioned in the middle of the prestressed steel strand;
the positioning supports are distributed at equal intervals in the vertical direction and are used for fixing the prestressed steel strands and the grouting pipes;
the fixing device is provided with a first fixing piece and a second fixing piece, wherein the first fixing piece performs tensioning locking on the upper end of the prestressed steel strand, and the second fixing piece performs tensioning locking on the lower end of the prestressed steel strand;
after the prestressed steel strands and the grouting pipes are inserted into the anchor rod drill holes, grouting is performed into the anchor rod drill holes through the grouting pipes, so that the inner sides and the outer sides of the prestressed steel strands are cast into an integral cylindrical column body;
it is characterized by also comprising:
and the guide device is sleeved on the second fixing piece and used for protecting the second fixing piece and guiding when the second fixing piece is embedded into the anchor rod drill hole.
In this application, for avoiding prestressing steel strand wires at the in-process that inserts underground, the second mounting is direct and underground water or some other liquid contacts that have corrosivity, for this reason, be provided with guider, this guider not only can make things convenient for prestressing steel strand wires and slip casting pipe quick the underground of inserting, but also can protect the second mounting, in order to avoid the second mounting by the corruption back, cause prestressing steel strand wires to break away from the second mounting, lead to the anti floating of whole device, the resistance to plucking ability weakens.
Further, the second fixing member includes:
the pressure-bearing steel plate is horizontally arranged;
an anchoring device;
the lower ends of the prestressed steel strands and the grouting pipes penetrate through the pressure-bearing steel plate, and the penetrating parts of the prestressed steel strands are fixed by the anchoring devices.
Wherein, still include: the bearing body is arranged on the pressure-bearing steel plate and used for improving the bearing strength of the pressure-bearing steel plate.
The second fixing piece is used for tensioning and locking the lower end of the prestressed steel strand, and for improving the connection strength, the lower end of the prestressed steel strand penetrates through the pressure-bearing steel plate to be arranged, the extending end of the prestressed steel strand is locked through the anchoring device, and a bearing body is further arranged for improving the bearing strength and the pulling resistance strength of the pressure-bearing steel plate.
Further, the guide device includes:
the protective sleeve is sleeved on the second fixing piece;
the guide cone is arranged at the lower end of the protective sleeve;
wherein, the external diameter of the guide cone cylinder is gradually reduced from top to bottom.
This application divide into protective sleeve and direction awl section of thick bamboo with guider, and wherein, protective sleeve plays the effect to the protection of second mounting, and the direction awl section of thick bamboo is then used for the direction, through its conical structure, makes things convenient for prestressing force steel strand wires, slip casting pipe to imbed in the drilling.
Further, the apparatus further comprises:
the number of the outer sleeves is consistent with that of the prestressed steel strands, and the outer sleeves are wrapped on the prestressed steel strands respectively;
the lower extreme of outer tube is fixed in on the second mounting, just the lower extreme of outer tube still overlaps and is equipped with the anticorrosive cover of heat transfer card.
In this application, the in-process in inserting the stock drilling is being installed, for avoiding the liquid direct action in the stock drilling on the prestressing force steel strand wires, be provided with the outer tube for this reason, wherein the whole sealed parcel prestressing force steel strand wires of outer tube to avoided having the object of corrosivity and its contact, and then can ensure that prestressing force steel strand wires are not corroded, prolonged the life of whole device greatly.
Because the lower end of the outer sleeve extends to the second fixing piece, a certain gap is formed at the joint of the outer sleeve and the second fixing piece, a hot sticking anti-corrosion sleeve is arranged for the purpose, and the sealing performance between the outer sleeve and the second fixing piece is improved through the hot sticking anti-corrosion sleeve.
Further, the apparatus further comprises:
the protective sleeve is vertically arranged, each outer sleeve and each grouting pipe are positioned in the protective sleeve, and the outer wall of the grouting body is formed on the inner wall of the protective sleeve;
the upper end of the protective sleeve is positioned below the first fixing piece, and the lower end of the protective sleeve extends downwards to the lower side of the guide device.
In this application, the device is inserting the in-process in the stock drilling, for avoiding the not complete discharge of silt in the stock drilling, leads to silt to adhere to on the outer sleeve pipe to and after the pouring, lead to the intensity reduction of slip casting body, be provided with protective case for this reason, protect through protective case.
Further, the apparatus further comprises:
and the cushion layer is arranged on the ground.
The bottom plate is arranged on the cushion layer;
after the outer sleeve, the prestressed steel strand and the grouting pipe are embedded into the anchor rod drill hole, the upper parts of the outer sleeve, the prestressed steel strand and the grouting pipe extend out of the cushion layer and the bottom plate through the insertion groove and the tensioning hole groove, and the extending parts of the outer sleeve and the prestressed steel strand are locked by the first fixing piece;
the slip casting body comprises:
a first slurry-injecting body is filled in the first slurry-injecting body,
and a second slip;
the guide device and the bottom plate are divided by the lower end of the bottom plate and are respectively cast, a first grouting body is arranged from the guide device to the lower end of the bottom plate, and a second grouting body is arranged from the lower end of the bottom plate to the upper end of the bottom plate; the outer wall shaping of first slip casting is in on the protective sheath inner wall, the outer wall shaping of second slip casting is in on the trompil inslot inner wall of bottom plate.
In order to improve the anti-pulling and anti-floating capacity of the whole device, a bottom plate is further arranged, and the contact area between the device and the ground is increased through the bottom plate; in the case of the grout, for improving the overall strength of the construction ground, the grout is divided into a first grout and a second grout for the convenience of providing a bottom plate, and the first and second grouts are separately cast.
Further, the apparatus further comprises:
the anti-pulling piece is used for improving the anti-pulling force of the grouting body;
resistance to plucking piece includes first spiral muscle and second spiral muscle, first spiral muscle and second spiral muscle all encircle the outer tube sets up, after the pouring, first spiral muscle is located the internal downside of first slip casting, second spiral muscle is located the internal upside of second slip casting.
After setting up first spiral muscle and second spiral muscle, not only can improve the joint strength between the prestressing force steel strand wires, but also can improve the bulk strength of first slip casting body and second slip casting body, and then reach the purpose that improves the resistance to plucking intensity of whole device.
Further, the first fixing member includes:
an anchor backing plate is arranged on the base plate,
the pre-stressed anchor device is provided with a pre-stressed anchor,
and a sealing cover;
the upper ends of the outer sleeve, the prestressed steel strand and the grouting pipe extend out of the bottom plate and penetrate through the anchor backing plate, the prestressed anchor tool locks the extending ends of the outer sleeve and the prestressed steel strand, the sealing cover covers the prestressed anchor tool, and the extending parts of the grouting pipe, the outer sleeve and the prestressed steel strand are covered and sealed.
The upper end of the prestressed steel strand is fixed through the matching of the anchor backing plate and the prestressed anchorage device, and of course, the upper end of the prestressed steel strand is provided with an extending end head so as to avoid long-time exposure and rusting, and a sealing cover is arranged for protecting the prestressed steel strand through the sealing cover.
The invention has the beneficial effects that:
1. the guide device is arranged, the guide device not only can facilitate the prestressed steel strand and the grouting pipe to be rapidly inserted into the ground, but also can protect the second fixing piece, so that the phenomenon that the prestressed steel strand is separated from the second fixing piece after the second fixing piece is corroded is avoided, and the anti-floating and anti-pulling capacity of the whole device is weakened.
2. In the process of inserting the anchor rod into the anchor rod drilling hole, in order to prevent liquid in the anchor rod drilling hole from directly acting on the prestressed steel strand, the outer sleeve is arranged, and the prestressed steel strand is protected by the outer sleeve so as to prevent corrosive objects from contacting the prestressed steel strand; because the lower end of the outer sleeve extends to the second fixing piece, a certain gap is formed at the joint of the outer sleeve and the second fixing piece, a hot sticking anti-corrosion sleeve is arranged for the purpose, and the sealing performance between the outer sleeve and the second fixing piece is improved through the hot sticking anti-corrosion sleeve.
3. In the process of inserting the anchor rod into the anchor rod drilling hole, in order to prevent the sludge in the anchor rod drilling hole from being incompletely discharged to cause the sludge to be attached to the outer sleeve and to cause the strength of the grouting body to be reduced after pouring, the protective sleeve is arranged and used for protection.
4. The upper end of the prestressed steel strand is provided with an extending end, so that the prestressed steel strand is prevented from being exposed outside for a long time and being rusted, and is protected by the sealing cover.
Drawings
FIG. 1 is a schematic structural diagram of an embodiment of the present invention;
FIG. 2 is an enlarged view at A in FIG. 1;
FIG. 3 is a schematic structural view of a second fastener in an embodiment of the invention;
the reference numbers in the figures are: 1. a grouting pipe; 2. pre-stressed steel strands; 3. positioning the bracket; 4. a fixing device; 41. a first fixing member; 411. an anchor backing plate; 412. a pre-stressed anchor; 413. a sealing cover; 42. a second fixing member; 421. a pressure-bearing steel plate; 422. an anchoring device; 423. a carrier; 5. grouting; 51. a first slip casting; 52. a second slip casting; 6. a guide device; 61. a protective sleeve; 62. a guiding cone; 7. an outer sleeve; 71. hot attaching an anti-corrosion sleeve; 8. protecting the sleeve; 9. a cushion layer; 10. a base plate; 20. an anti-pulling element; 201. a first spiral rib; 202. a second spiral rib.
Detailed Description
The technical solutions in the embodiments of the present application will be described clearly below with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are some embodiments of the present application, but not all embodiments. All other embodiments that can be derived by one of ordinary skill in the art from the embodiments given herein are intended to be within the scope of the present disclosure.
In the description of the present invention, it is to be noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of exemplary embodiments according to the present application. For convenience of description, the dimensions of the various features shown in the drawings are not necessarily drawn to scale. Techniques, methods, and apparatus known to those of ordinary skill in the relevant art may not be discussed in detail but are intended to be part of the specification where appropriate. In all examples shown and discussed herein, any particular value should be construed as merely illustrative, and not limiting. Thus, other examples of the exemplary embodiments may have different values. It should be noted that: like reference numbers and letters refer to like items in the following figures, and thus, once an item is defined in one figure, further discussion thereof is not required in subsequent figures.
It should be noted that the terms "first," "second," and the like in the description and in the claims of the present application are used for distinguishing between similar elements and not necessarily for describing a particular sequential or chronological order. It will be appreciated that the data so used may be interchanged under appropriate circumstances such that embodiments of the application may be practiced in sequences other than those illustrated or described herein, and that the terms "first," "second," and the like are generally used herein in a generic sense and do not limit the number of terms, e.g., the first term can be one or more than one. In addition, "and/or" in the specification and claims means at least one of connected objects, a character "/" generally means that a preceding and succeeding related objects are in an "or" relationship.
It should be noted that in the description of the present application, the orientation or positional relationship indicated by the terms such as "front, back, up, down, left, right", "lateral, vertical, horizontal" and "top, bottom" and the like are generally based on the orientation or positional relationship shown in the drawings for convenience of description and simplicity of description only, and in the case of not making a reverse description, these orientation terms do not indicate and imply that the device or element being referred to must have a specific orientation or be constructed and operated in a specific orientation, and therefore, should not be construed as limiting the scope of the present application; the terms "inner and outer" refer to the inner and outer relative to the profile of the respective component itself.
It should be noted that, in the present application, 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, an element defined by the phrase "comprising an … …" does not exclude the presence of other like elements in a process, method, article, or apparatus that comprises the element. Further, it should be noted that the scope of the methods and apparatus of the embodiments of the present application is not limited to performing the functions in the order illustrated or discussed, but may include performing the functions in a substantially simultaneous manner or in a reverse order based on the functions involved, e.g., the methods described may be performed in an order different than that described, and various steps may be added, omitted, or combined. In addition, features described with reference to certain examples may be combined in other examples.
As shown in fig. 1, the present embodiment provides a prestressed corrosion-resistant durable device, including:
the prestressed steel strands 1 are vertically arranged, and more than two prestressed steel strands are distributed in the circumferential direction;
the grouting pipe 2 is vertically arranged and is positioned in the middle of the prestressed steel strand 1;
the positioning supports 3 are provided with a plurality of positioning supports which are distributed at equal intervals along the vertical direction and are used for fixing the grouting pipes 2 and the prestressed steel strands 1;
the fixing device 4 is provided with a first fixing piece 41 and a second fixing piece 42, wherein the first fixing piece 41 performs tensioning locking on the upper end of the prestressed steel strand 1, and the second fixing piece 42 performs tensioning locking on the lower end of the prestressed steel strand 1;
after the prestressed steel strands 1 and the grouting pipes 2 are inserted into the anchor rod drill holes, grouting is performed into the anchor rod drill holes through the grouting pipes 2, so that the inner sides and the outer sides of the prestressed steel strands 1 are cast into an integral cylindrical column;
wherein, still include:
and the guide device 6 is sleeved on the second fixing piece 42 and used for protecting the second fixing piece 42 and guiding when the second fixing piece is embedded into the anchor rod drill hole.
In this embodiment, the prestressed steel strand 1 is a slow-bonding prestressed steel strand 1, which has two or more (2, 3, 4 or more), for convenience of display, the prestressed steel strands 1 in the drawing are 2, which are distributed around the grouting pipe 2, and are fixedly supported by the positioning bracket 3, and then the lower end of the prestressed steel strand 1 is fixed by the second fixing member 42; when the number of the prestressed steel strands 1 is 2-3, the prestressed steel strands are distributed in the circumferential direction, and the lower ends of the prestressed steel strands 1 extend to the bottom of the grouting body 5; when the number of the prestressed steel strands is 4, 6 or more than two, the prestressed steel strands 1 are distributed in a unit manner, namely two prestressed steel strands are one unit, wherein in each unit, the lower end of one prestressed steel strand is led to the bottom of the grouting body 5, the lower end of the other prestressed steel strand only needs to extend to the middle lower part of the grouting body, and therefore multi-section bearing is achieved through unit distribution, and the purpose of pressure dispersion is achieved.
In order to avoid the process that prestressing steel strand wires 1 are inserting underground, second mounting 42 is direct and some have corrosive silt contact with groundwater or other, for this reason, be provided with guider 6, this guider 6 not only can make things convenient for prestressing steel strand wires 1 and slip casting pipe 2 quick inserting underground, but also can protect second mounting 42, in order to avoid second mounting 42 to be corroded the back, cause prestressing steel strand wires 1 to break away from second mounting 42, lead to whole device anti superficial, resistance to plucking can weaken.
As shown in fig. 1 and fig. 3, in this embodiment, the method further includes:
the number of the outer sleeves 7 is consistent with that of the prestressed steel strands 1, and the outer sleeves are respectively wrapped on the prestressed steel strands 1;
the lower end of the outer sleeve 7 is fixed on the second fixing member 42, and the lower end of the outer sleeve 7 is further sleeved with a thermal patch anti-corrosion sleeve 71.
In this embodiment, the device is inserting the in-process in the stock drilling, for avoiding on the liquid direct action in the stock drilling is prestressed steel strand 1, is provided with outer tube 7 for this reason, wherein outer tube 7 whole sealing package prestressed steel strand 1 to avoided having corrosive object and its contact, and then can ensure that prestressed steel strand is not corroded, prolonged the life of whole device greatly.
Because the lower end of the outer sleeve 7 extends to the second fixing member 42, the joint between the two has a certain gap, and a heat sealing anti-corrosion sleeve 71 is arranged for this purpose, and the sealing performance between the two is improved by the heat sealing anti-corrosion sleeve 71.
As shown in fig. 1, the present embodiment further includes:
the protective sleeve 8 is vertically arranged, each outer sleeve 7 and each grouting pipe 2 are positioned in the protective sleeve 8, and the outer wall of the grouting body 5 is formed on the inner wall of the protective sleeve 8;
the upper end of the protective sleeve 8 is located below the first fixture 41 and the lower end extends down below the guide 6.
In this embodiment, the device is at the in-process that inserts in the stock drilling, for avoiding the not complete discharge of silt in the stock drilling, results in silt to adhere to on outer tube 7 to and after the pouring, result in the intensity reduction of slip casting body 5, be provided with protective sleeve 8 for this reason, protect through protective sleeve 8, protective sleeve 8's lower extreme needs seal, in order to avoid the interior silt of stock drilling and sewage to enter into protective sleeve 8.
As shown in fig. 1, in this embodiment, the present invention further includes a cushion layer 9 disposed on the ground; a bottom plate 10 disposed on the cushion layer 9;
after the outer sleeve 7, the prestressed steel strand 1 and the grouting pipe 2 are embedded into the anchor rod drill hole, the upper parts of the outer sleeve 7, the prestressed steel strand 1 and the grouting pipe extend out of the cushion layer 9 and the bottom plate 10 through the insertion groove and the tensioning hole groove, and the extending parts of the outer sleeve 7 and the prestressed steel strand 1 are locked by the first fixing piece 41;
the grout 5 includes:
the first slurry-injection body 51 is formed,
and a second slip 52;
the two parts are divided by the lower end of the bottom plate 10 and are respectively cast, a first grouting body 51 is arranged from the guide device 6 to the lower end part of the bottom plate 10, and a second grouting body 52 is arranged from the lower end of the bottom plate 10 to the upper end part of the bottom plate 10; the outer wall of the first grout 51 is formed on the inner wall of the protective sleeve 8, and the outer wall of the second grout 52 is formed on the inner wall of the open-hole groove of the bottom plate 10.
In order to improve the anti-pulling and anti-floating capacity of the whole device, a cushion layer 9 and a bottom plate 10 are further arranged, the bottom plate 10 is formed by casting, reinforcing steel bars are distributed inside the bottom plate 10, and the contact area between the device and the ground is increased through the bottom plate 10.
The grout 5 is used to improve the overall strength of the construction ground, and for the convenience of laying the base plate 10, the grout 5 is divided into a first grout 51 and a second grout 52, and the two grouts are separately poured.
As shown in fig. 1, in the present embodiment, the first fixing member 41 includes:
the anchor pad 411 is provided with a plurality of anchor pads,
the pre-stressed anchor 412 is set in a pre-stressed state,
and a sealing cover 413;
after the upper ends of the outer sleeve 7, the prestressed steel strand 1 and the grouting pipe 2 extend out of the bottom plate 10 and penetrate through the anchor backing plate 411, the prestressed anchor 412 locks the extending ends of the outer sleeve 7 and the prestressed steel strand 1, the sealing cover 413 covers the prestressed anchor 412, and covers and seals the extending parts of the grouting pipe 2, the outer sleeve 7 and the prestressed steel strand 1.
The upper end of the prestressed steel strand 1 is fixed by the matching of the anchor backing plate 411 and the prestressed anchorage device 412, and certainly, because the upper end of the prestressed steel strand 1 is provided with an extending end, in order to avoid rusting caused by long-time exposure, a sealing cover 413 is arranged for protecting the prestressed steel strand by the sealing cover 413; in order to facilitate installation, the prestressed anchorage 412 of the sealing cover 413 can be assembled in a threaded manner.
As shown in fig. 1 and 3, in the present embodiment, the second fixing member 42 includes:
a pressure-bearing steel plate 421 horizontally arranged;
an anchoring device 422;
the lower ends of the prestressed steel strand 1 and the grouting pipe 2 penetrate through the pressure-bearing steel plate 421, and the penetrating part of the prestressed steel strand 1 is fixed by the anchoring device 422.
Wherein, still include: and a supporting body 423 disposed on the pressure-bearing steel plate 421 for improving the supporting strength of the pressure-bearing steel plate 421.
The second fixing member 42 is used for tensioning and locking the lower end of the prestressed steel strand 1, and for improving the connection strength, the lower end of the prestressed steel strand 1 is arranged to penetrate through the pressure-bearing steel plate 421, and the extending end of the prestressed steel strand 1 is locked by the anchoring device 422, and of course, for improving the bearing strength and the pulling strength of the pressure-bearing steel plate 421, a bearing body 423 is further provided. The supporting body 423 can be cast into a columnar structure by a casting method, or a pressure-bearing steel plate 421 is additionally arranged, the two pressure-bearing steel plates 421 are arranged up and down, and then the two pressure-bearing steel plates 421 are connected by a connecting bolt.
As shown in fig. 1, in the present embodiment, the guide 6 includes:
a protective sleeve 61 sleeved on the second fixing member 42;
the guide cone 62 is arranged at the lower end of the protective sleeve 61;
wherein, the outer diameter of the guiding cone 62 is gradually reduced from top to bottom.
Through dividing guider 6 into protective sleeve 61 and direction awl section of thick bamboo 62, wherein, protective sleeve 61 cover is established on anchor 422, protects anchor 422, and direction awl section of thick bamboo 62 is then used for the direction, through its conical structure, makes things convenient for in prestressing force steel strand 1, the slip casting pipe 2 imbeds the drilling.
As shown in fig. 3, for the convenience of assembly, one protective sleeve 61 may be provided to fit over three anchors 422, the upper end surface of the guiding cone 62 is directly connected to the lower end surface of the protective sleeve 61, and the grouting pipe 2 extends downward and penetrates through the protective sleeve 61 and the guiding cone 62.
Or, the number of the protective sleeves 61 may be three, and the protective sleeves are respectively sleeved on each of the anchoring devices 422, the guide cone 62 may be connected to the pressure-bearing steel plate 421 through vertical and circumferentially distributed connecting ribs, and the guide device 6 may be assembled by welding to the lower end surface of the pressure-bearing steel plate 421, or by casting.
Example 2:
as shown in fig. 1, the present embodiment discloses a prestressed corrosion-resistant durable device, which includes the following technical features:
a pullout resistance member 20 for improving pullout resistance of the grout 5;
the anti-pulling part 20 comprises a first spiral rib 201 and a second spiral rib 202, the first spiral rib 201 and the second spiral rib 202 are arranged around the outer sleeve 7, after pouring, the first spiral rib 201 is located on the lower side of the first grout 51, and the second spiral rib 202 is located on the upper side of the second grout 52.
After setting up first spiral muscle 201 and second spiral muscle 202, not only can improve the joint strength between the prestressing steel strand 1, but also can improve the bulk strength of first slip casting 51 and second slip casting 52, and then reach the purpose that improves the resistance to plucking intensity of whole device.
While the embodiments of the present application have been described in connection with the drawings, the embodiments and features of the embodiments of the present application can be combined with each other without conflict, and the present application is not limited to the above-mentioned embodiments, which are only illustrative and not restrictive, and those skilled in the art can make many forms without departing from the spirit and scope of the present application and the claims.
Claims (8)
1. A prestressed corrosion-resistant durable device comprising:
the prestressed steel strands (1) are vertically arranged, and more than two prestressed steel strands are distributed in the circumferential direction;
the grouting pipe (2) is vertically arranged and is positioned in the middle of the prestressed steel strand (1);
the positioning supports (3) are arranged in a plurality and are distributed at equal intervals in the vertical direction and used for fixing the prestressed steel strands (1) and the grouting pipes (2);
the fixing device (4) is provided with a first fixing piece (41) and a second fixing piece (42), wherein the first fixing piece (41) performs tensioning locking on the upper end of the prestressed steel strand (1), and the second fixing piece (42) performs tensioning locking on the lower end of the prestressed steel strand (1);
the grouting body (5) is used for grouting the anchor rod drill hole through the grouting pipe (2) after the prestressed steel strand (1) and the grouting pipe (2) are inserted into the anchor rod drill hole, and the inner side and the outer side of the prestressed steel strand (1) are cast into an integral cylindrical column body;
it is characterized by also comprising:
and the guide device (6) is sleeved on the second fixing piece (42) and is used for protecting the second fixing piece (42) and guiding when the second fixing piece is embedded into the anchor rod drilling hole.
2. A prestressed corrosion-resistant durable device according to claim 1, wherein said second fixing member (42) comprises:
a pressure-bearing steel plate (421) horizontally arranged;
an anchoring device (422);
the lower ends of the prestressed steel strand (1) and the grouting pipe (2) penetrate through the pressure-bearing steel plate (421), the penetrating part of the prestressed steel strand (1) is fixed by the anchoring device (422),
wherein, still include: and the bearing body (423) is arranged on the pressure-bearing steel plate (421) and is used for improving the bearing strength of the pressure-bearing steel plate (421).
3. A prestressed corrosion-resistant durable device according to claim 2, characterized in that said guide means (6) comprise:
the protective sleeve (61) is sleeved on the second fixing piece (42);
the guide cone (62) is arranged at the lower end of the protective sleeve (61);
wherein, the outside diameter of the guide cone cylinder (62) is gradually reduced from top to bottom.
4. A prestressed corrosion-resistant durable device as claimed in any one of claims 1-3, further comprising:
the number of the outer sleeves (7) is consistent with that of the prestressed steel strands (1), and the outer sleeves are respectively wrapped on the prestressed steel strands (1);
the lower extreme of outer tube (7) is fixed in on second mounting (42), just the lower extreme of outer tube (7) still overlaps and is equipped with hot card anticorrosive cover (71).
5. The prestressed corrosion-resistant durable device according to claim 4, further comprising:
the protective sleeves (8) are vertically arranged, the outer sleeves (7) and the grouting pipes (2) are positioned in the protective sleeves (8), and the outer walls of the grouting bodies (5) are formed on the inner walls of the protective sleeves (8);
the upper end of the protective sleeve (8) is positioned below the first fixing piece (41), and the lower end of the protective sleeve extends downwards to the position below the guide device (6).
6. The prestressed corrosion-resistant durable device according to claim 5, further comprising:
a cushion layer (9) arranged on the ground;
a bottom plate (10) arranged on the cushion layer (9);
after the outer sleeve (7), the prestressed steel strand (1) and the grouting pipe (2) are embedded into the anchor rod drill hole, the upper parts of the outer sleeve (7), the prestressed steel strand (1) and the grouting pipe extend out of the cushion layer (9) and the bottom plate (10) through the insertion groove and the tensioning hole groove, and the extending parts of the outer sleeve (7) and the prestressed steel strand (1) are locked by the first fixing piece (41);
the grout (5) comprises:
a first slip body (51) formed by a first slip body,
and a second slip body (52);
the two parts are divided by the lower end of a bottom plate (10) and are respectively cast, a first grouting body (51) is arranged from the guide device (6) to the lower end part of the bottom plate (10), and a second grouting body (52) is arranged from the lower end of the bottom plate (10) to the upper end part of the bottom plate (10); the outer wall of the first grouting body (51) is formed on the inner wall of the protective sleeve (8), and the outer wall of the second grouting body (52) is formed on the inner wall of the tensioning hole groove of the bottom plate (10).
7. The prestressed corrosion-resistant durable device according to claim 6, further comprising:
a pull-out resistance member (20) for increasing the pull-out resistance of the grout (5);
resistance to plucking piece (20) include first spiral muscle (201) and second spiral muscle (202), first spiral muscle (201) and second spiral muscle (202) all encircle outer tube (7) set up, after the pouring, first spiral muscle (201) are located the downside in first slip casting body (51), second spiral muscle (202) are located the upside in second slip casting body (52).
8. The prestressed corrosion-resistant durable device according to claim 7, wherein said first fixing member (41) comprises:
an anchor backing plate (411),
a pre-stressed anchor (412),
and a sealing cover (413);
after the upper ends of the outer sleeve (7), the prestressed steel strand (1) and the grouting pipe (2) extend out of the bottom plate (9) and penetrate through the anchor backing plate (411), the extending ends of the outer sleeve (7) and the prestressed steel strand (1) are locked by the prestressed anchor (412), the sealing cover (413) covers the prestressed anchor (412), and the extending parts of the outer sleeve (7), the prestressed steel strand (1) and the grouting pipe (2) are covered and sealed.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110783593.3A CN113338351A (en) | 2021-07-12 | 2021-07-12 | Anticorrosive durable device of prestressing force |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110783593.3A CN113338351A (en) | 2021-07-12 | 2021-07-12 | Anticorrosive durable device of prestressing force |
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| CN113338351A true CN113338351A (en) | 2021-09-03 |
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| CN202110783593.3A Pending CN113338351A (en) | 2021-07-12 | 2021-07-12 | Anticorrosive durable device of prestressing force |
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Cited By (1)
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| CN113605931A (en) * | 2021-09-07 | 2021-11-05 | 浙江大学 | Soil layer interface urban tunnel crossing reinforcement structure and construction method thereof |
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