CN118422606A - Glass fiber sleeve and preparation and construction methods thereof - Google Patents
Glass fiber sleeve and preparation and construction methods thereof Download PDFInfo
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- CN118422606A CN118422606A CN202410679683.1A CN202410679683A CN118422606A CN 118422606 A CN118422606 A CN 118422606A CN 202410679683 A CN202410679683 A CN 202410679683A CN 118422606 A CN118422606 A CN 118422606A
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Abstract
The invention provides a glass fiber sleeve and a preparation and construction method thereof, wherein the glass fiber sleeve comprises a glass fiber plate and two self-locking anchors respectively anchored at two ends of the glass fiber plate, the glass fiber plate is used for bending around a cylinder to be reinforced and is connected through the two self-locking anchors to form a sleeve body, and a grouting annular cavity is formed between the inner wall of the sleeve body and the peripheral wall of the cylinder to be reinforced; the glass fiber board comprises at least two layers of glass fiber cloth and at least one layer of high Jiang Wangge cloth, and at least one layer of glass fiber cloth is adhered to two sides of each layer of high Jiang Wangge cloth; each layer of high Jiang Wangge cloth is applied with radial pretension, and the radial pretension is used for enabling the glass fiber board to generate centripetal bending stress when the sleeve body is formed around the cylinder to be reinforced. The glass fiber sleeve and the preparation and construction methods thereof can improve the bearing capacity and the reinforcement effect of the glass fiber sleeve reinforcement system and reduce the reinforcement construction difficulty of the glass fiber sleeve.
Description
Technical Field
The invention belongs to the technical field of glass fiber sleeve reinforcement, and particularly relates to a glass fiber sleeve and a preparation and construction method thereof.
Background
The reinforcing technology for reinforcing, repairing and protecting underwater pile foundation and pier column mainly consists of underwater epoxy grouting material and customized glass fiber sleeve, and can complete bridge pile repairing and reinforcing of concrete pile, steel pile, wood pile and other materials under the condition of underwater operation. Practice has proven that the underwater fiberglass sleeve reinforcement system is an economical, efficient and long-term maintenance solution.
At present, the glass fiber sleeve is used for reinforcing a building, and the glass fiber sleeve reinforcing system belongs to a passive reinforcing mode, and can only perform surrounding hoop reinforcement through a prefabricated glass fiber sleeve, and cannot actively provide pretightening force, so that the bearing capacity is low; secondly, for some columns to be reinforced such as pile foundations or pier columns with smaller cross section sizes, the difficulty of bending and laminating the glass fiber sleeve on the columns to be reinforced is extremely high, and even the glass fiber sleeve cannot form lamination with the columns to be reinforced, so that the reinforcing effect is affected.
Disclosure of Invention
The embodiment of the invention provides a glass fiber sleeve and a preparation and construction method thereof, and aims to improve the bearing capacity and the reinforcement effect of a glass fiber sleeve reinforcement system and reduce the reinforcement construction difficulty of the glass fiber sleeve.
In order to achieve the above purpose, the invention adopts the following technical scheme: in a first aspect, a glass fiber sleeve is provided, which comprises a glass fiber plate and two self-locking anchors respectively anchored at two ends of the glass fiber plate, wherein the glass fiber plate is used for bending around a cylinder to be reinforced and is connected through the two self-locking anchors to form a sleeve body, and a grouting annular cavity is formed between the inner wall of the sleeve body and the peripheral wall of the cylinder to be reinforced; the glass fiber board comprises at least two layers of glass fiber cloth and at least one layer of high Jiang Wangge cloth, and at least one layer of glass fiber cloth is adhered to two sides of each layer of high Jiang Wangge cloth; each layer of high Jiang Wangge cloth is applied with radial pretension, and the radial pretension is used for enabling the glass fiber board to generate centripetal bending stress when the sleeve body is formed around the cylinder to be reinforced.
With reference to the first aspect, in one possible implementation manner, the high-strength mesh fabric includes a plurality of warps, each warp is a high-strength wire with a warp pretension applied, and two ends of each warp are respectively connected with two self-locking anchors.
In some embodiments, two self-locking anchors are disposed back-to-back and both include an anchor portion and a connecting portion; the anchoring part is provided with a clamping groove which is suitable for the end part of the glass fiber plate to extend into and anchor, the two connecting parts are connected through a plurality of adjustable connecting pieces, and each warp is correspondingly connected with each adjustable connecting piece; the adjustable connecting piece is used for tensioning two self-locking anchors and also used for tensioning each warp.
The connecting parts are provided with a plurality of through holes and a plurality of threaded holes at intervals along the axial direction of the column to be reinforced, the through holes and the threaded holes are sequentially and crosswise distributed, and the threaded holes on one connecting part are respectively in one-to-one correspondence with the through holes on the other connecting part; each adjustable connecting piece passes through each through hole correspondingly and is in threaded connection with the corresponding threaded hole, and each warp is connected to one end, far away from the threaded hole, of the adjustable connecting piece correspondingly.
The adjustable connecting piece comprises a connecting sleeve and an adjusting column, wherein the adjusting column penetrates through the connecting sleeve and is in threaded connection fit with the connecting sleeve, and the connecting sleeve penetrates through the through hole and is in threaded connection fit with the corresponding threaded hole; wherein, warp is connected with the adjusting column.
In some embodiments, the anchoring portion is provided with a plurality of perforations along an axial direction of the column to be reinforced at intervals, each perforation corresponds to a position of each through hole and is communicated with the clamping groove, each perforation corresponds to a plurality of warps respectively, ends of each warp corresponding to the same perforation position are interwoven to form twisting heads, and each twisting head passes through each perforation correspondingly and is connected with the corresponding adjustable connecting piece.
The glass fiber sleeve provided by the invention has the beneficial effects that: compared with the prior art, the glass fiber sleeve has the advantages that the glass fiber plates formed by clamping the high-strength grid cloth by the multi-layer glass fiber cloth are respectively connected with the self-locking anchors at the two ends to form the sleeve body, the high-strength grid cloth with the elastic modulus far higher than that of the glass fiber cloth can be used for improving the overall bearing capacity, and the radial pretightening force applied by the high-strength grid cloth can be used for enabling the glass fiber plates to obtain radial bending stress when the glass fiber plates are bent, so that the difficulty of bending and encircling the glass fiber plates to the cylinder to be reinforced can be reduced, the reinforcing construction of the cylinder to be reinforced with smaller cross section size can be facilitated, the limiter arranged on the inner wall of the sleeve body can be abutted against the cylinder to be reinforced by utilizing the radial bending stress obtained by the sleeve body, the uniformity of the circumferential thickness of a grouting annular cavity is improved, the uniform grouting thickness is ensured, the occurrence of hollowness phenomenon is avoided, and the combination between the sleeve body and the slurry and the cylinder to be reinforced is more reliable and stable, and the compressive bearing capacity and the reinforcing effect of the cylinder to be reinforced are improved after the reinforcing is completed.
In a second aspect, an embodiment of the present invention further provides a glass fiber sleeve manufacturing method for manufacturing the glass fiber sleeve, including the following steps:
calculating to obtain the number of layers of the glass fiber cloth and the high-strength mesh cloth;
Tensioning anchors are respectively arranged at two ends of the warp direction of the single-layer high-strength grid cloth;
applying a tensioning force to the tensioning anchor to enable the high-strength grid cloth to obtain a warp pretension for tensioning;
respectively sticking at least one layer of glass fiber cloth on the two side surfaces of the high-strength grid cloth;
if the number of layers of the high-strength mesh cloth is one, heating, solidifying and cooling at room temperature the high-strength mesh cloth with the glass fiber cloth adhered to the two sides, and dismantling the tensioning anchorage device after cooling is finished to obtain a glass fiber plate;
If the number of layers of the high-strength mesh cloth is multiple, paving a second layer of high-strength mesh cloth provided with a tensioning anchor on the glass fiber cloth adhered to one side of the first layer of high-strength mesh cloth, applying tensioning force to the tensioning anchor to enable the second layer of high-strength mesh cloth to obtain warp pretension and tightly adhered to the glass fiber cloth, adhering at least one layer of glass fiber cloth to the exposed surface of the second layer of high-strength mesh cloth, and sequentially repeating until the number of layers of the glass fiber cloth and the high-strength mesh cloth is consistent with the calculated number of layers, heating, solidifying and cooling at room temperature, and dismantling the tensioning anchor after cooling is finished to obtain the glass fiber board;
The two ends of the glass fiber board are respectively anchored with the self-locking anchors and form the sleeve body after the two self-locking anchors are connected.
With reference to the second aspect, in one possible implementation manner, calculating the number of layers of the glass fiber cloth and the high-strength mesh cloth includes:
determining an axial pressure value which can be achieved after the column to be reinforced is reinforced;
according to the axial pressure value, the single-layer tensile resistance value of the glass fiber cloth and the single-layer tensile resistance value of the high-strength mesh cloth, calculating to obtain the number of layers of the glass fiber cloth and the number of layers of the high-strength mesh cloth; wherein the number of layers of the glass fiber cloth is more than that of the high-strength mesh cloth.
Illustratively, the tensioning anchor includes:
the seat board is provided with a plurality of first connecting holes in an array mode, and the top surface of the seat board comprises a first curved surface section and a first tooth section;
the pressing plate is covered on the seat plate, a plurality of second connecting holes are distributed on the pressing plate in an array mode, and the bottom surface of the pressing plate comprises a second curved surface section and a second tooth line section;
a plurality of fasteners respectively penetrating through the second connecting holes and being in threaded connection with the first connecting holes;
The pressing plate and the seat plate are matched and clamped to form high-strength mesh cloth, the first curved surface section and the second curved surface section are correspondingly embedded, and the first insection section and the second insection section are correspondingly embedded.
The glass fiber sleeve preparation method provided by the invention has the beneficial effects that: compared with the prior art, the glass fiber sleeve preparation method can obtain the glass fiber plate clamped with the high-strength grid cloth, the glass fiber plate is mutually connected through the self-locking anchors at the two ends of the glass fiber plate to form the sleeve body, the high-strength grid cloth with the elastic modulus far higher than that of the glass fiber cloth can be used for improving the overall bearing capacity, and the radial pre-tightening force applied by the high-strength grid cloth is used for enabling the glass fiber plate to obtain centripetal bending stress when being bent, so that the difficulty of bending and encircling the glass fiber plate to the cylinder to be reinforced can be reduced, the reinforcing construction of the cylinder to be reinforced with smaller cross section size can be facilitated, and the limiter arranged on the inner wall of the sleeve body can be abutted against the cylinder to be reinforced by utilizing the centripetal bending stress obtained by the sleeve body, so that the consistency of the circumferential thickness of a grouting annular cavity is improved, the grouting thickness is ensured to be uniform, the occurrence of hollowness phenomenon is avoided, the sleeve body is more reliably and stably combined with the slurry, and the cylinder to be reinforced, and the compressive bearing capacity and the reinforcing effect of the cylinder to be reinforced are improved after the reinforcing is completed.
In a third aspect, the embodiment of the present invention further provides a construction method for a glass fiber sleeve, where the glass fiber sleeve is used for reinforcing a column to be reinforced, and the method includes the following steps:
cutting a glass fiber board, respectively installing self-locking anchors at two ends of the glass fiber board to form an unfolded sleeve body, and leading out warp threads of the high-strength mesh cloth to be connected with an adjustable connecting piece of the self-locking anchors;
A sealing strip is arranged at the bottom of the unfolded sleeve body, and a limiter is arranged on the inner surface of the unfolded sleeve body;
the unfolded sleeve body surrounds the column body to be reinforced, two self-locking anchors are connected through each adjustable connecting piece, and centripetal bending stress of the sleeve body is increased through adjusting the adjustable connecting pieces, so that the limiters are abutted against the surface of the column body to be reinforced, and a grouting annular cavity is formed;
grouting slurry into the grouting annular cavity, and capping and maintaining after the slurry is solidified.
Compared with the prior art, the glass fiber sleeve construction method provided by the invention has the beneficial effects that the glass fiber sleeve is adopted, the radial pretension of the high-strength grid cloth is utilized to enable the glass fiber plate to generate centripetal bending stress when being bent, so that the bending operation difficulty of a cylinder to be reinforced with smaller cross section size is reduced, two self-locking anchors are connected by using an adjustable connecting piece to realize self-locking fixation, the construction difficulty is further reduced, simultaneously, all warp yarns of the high-strength grid cloth can be subjected to radial pretension adjustment by using the adjustable connecting piece, so that the limiters arranged in the sleeve body are abutted against the cylinder to be reinforced, the circumferential thickness consistency of a grouting annular cavity is improved, the grouting thickness is ensured to be uniform and consistent, the occurrence of hollowing phenomenon is avoided, the combination between the sleeve body and the slurry, the slurry and the cylinder to be reinforced is more reliable and stable, and the compression bearing capacity and the reinforcing effect of the cylinder to be reinforced are improved after the reinforcement is completed.
Drawings
FIG. 1 is a schematic side view of a glass fiber sleeve according to an embodiment of the present invention;
FIG. 2 is a schematic cross-sectional view taken along line A-A of FIG. 1;
FIG. 3 is a schematic view of a partial enlarged structure at B in FIG. 1;
FIG. 4 is a schematic view of a structure of a glass fiber board in a layer-by-layer separated state according to an embodiment of the present invention;
FIG. 5 is a schematic perspective view of a self-locking anchor according to an embodiment of the present invention;
FIG. 6 is a schematic perspective view of an adjustable connector according to an embodiment of the present invention;
FIG. 7 is a schematic view showing the distribution of pretension in warp direction of a glass fiber board in an expanded state according to an embodiment of the present invention;
FIG. 8 is a graph showing the distribution of centripetal bending stress generated by a glass fiber board in bending according to an embodiment of the present invention;
FIG. 9 is a schematic diagram of a tensioning anchor used in an embodiment of the present invention;
FIG. 10 is a schematic perspective view of a seat plate according to an embodiment of the present invention;
Fig. 11 is a schematic perspective view of a platen according to an embodiment of the present invention.
In the figure: 100. glass fiber board; 101. glass fiber cloth; 102. high-strength mesh cloth; 1020. twisting; 1021. warp threads; 200. self-locking anchorage devices; 201. an anchor portion; 2011. a clamping groove; 2012. perforating; 202. a connection part; 2021. a through hole; 2022. a threaded hole; 300. a sleeve body; 500. an adjustable connector; 501. connecting sleeves; 502. an adjusting column; 60. stretching an anchor; 601. a seat plate; 6011. a first connection hole; 6012. a first curved surface section; 6013. a first tooth segment; 602. a pressing plate; 6021. a second connection hole; 6022. a second curved surface section; 6023. and a second tooth segment.
Detailed Description
In order to make the technical problems, technical schemes and beneficial effects to be solved more clear, the invention is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are for purposes of illustration only and are not intended to limit the scope of the invention.
It will be understood that when an element is referred to as being "disposed on" another element, it can be directly on the other element or be indirectly on the other element. It is to be understood that the terms "warp," "weft," "upper," "lower," "front," "back," "top," "bottom," "inner," "outer," and the like indicate or are based on the orientation or positional relationship shown in the drawings, and are merely for convenience in describing the present application and simplifying the description, and do not indicate or imply that the devices or elements being referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as limiting the present application. The terms "first," "second," and the like, are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include one or more such feature. In the description of the present application, the meaning of "a plurality" or "a number" means two or more, unless specifically defined otherwise.
Referring to fig. 1 to 8, a glass fiber sleeve according to the present invention will be described. The glass fiber sleeve comprises a glass fiber plate 100 and two self-locking anchors 200 respectively anchored at two ends of the glass fiber plate 100, wherein the glass fiber plate 100 is used for bending around a cylinder to be reinforced and is connected through the two self-locking anchors 200 to form a sleeve body 300, and a grouting annular cavity is formed between the inner wall of the sleeve body 300 and the peripheral wall of the cylinder to be reinforced; the glass fiber board 100 comprises at least two layers of glass fiber cloth 101 and at least one layer of high Jiang Wangge cloth 102, wherein at least one layer of glass fiber cloth 101 is adhered to two sides of each layer of high Jiang Wangge cloth 102; wherein each layer of high Jiang Wangge cloth 102 is applied with a warp pretension for causing a centripetal bending stress of the glass fiber board 100 when the sleeve body 300 is formed around the column to be reinforced.
In this embodiment, the glass fiber cloth 101 may be a warp-weft bidirectional glass fiber cloth made of high-strength alkali-free glass fibers, the high-strength mesh cloth 102 may be a unidirectional high-strength metal fiber mesh cloth with warp-direction high-strength threads (specifically, high-strength metal wire bundles) and weft-direction high-strength metal fiber bundles, or a high-strength metal fiber mesh cloth formed by bonding warp-direction high-strength threads (specifically, high-strength metal wire bundles) and hot-melt glass fiber mesh cloth through a heating process, or a high-strength metal mesh cloth formed by braiding warp-weft bidirectional high-strength metal wire bundles, and the unidirectional high-strength metal fiber mesh cloth may be preferably adopted here in consideration of material cost, wherein the high-strength metal wire bundles may be subjected to corrosion-resistant treatments such as galvanization, copper plating, and the like.
In the embodiment, the glass fiber board 100 has glass fiber cloth 101 on two side surfaces, and at least one layer of glass fiber cloth 101 is arranged on two sides of each layer of high Jiang Wangge cloth 102 to form a laminated bonding structure; specifically, the total number of layers of the glass fiber cloth 101 and the high-strength mesh cloth 102 is at least three, and the glass fiber cloth 101 is at least one layer more than the high-strength mesh cloth 102, so that the glass fiber cloth 101 is used as the exposed surface of the glass fiber board 100 to play a role in protecting seawater, chemical reagent, acid and alkali corrosion resistance.
In this embodiment, the glass fiber cloth 101 and the high-strength mesh cloth 102 are connected by adopting an adhesive bonding and fixing mode, and the specific adhesive can be unsaturated polyester, vinyl resin or epoxy resin, and the glass fiber cloth 101 can be pre-soaked in the adhesive during bonding, so that the surface of the glass fiber cloth is ensured to be uniformly adhered with the adhesive.
In this embodiment, it is considered that the high-strength mesh cloth 102 needs to apply a warp pretension, so the warp dimension of the high-strength mesh cloth 102 should be larger than that of the glass fiber cloth 101, so that the tensioning anchor 60 is convenient to anchor and tension the end of the high-strength mesh cloth 102, and meanwhile, the warp 1021 of the high-strength mesh cloth 102 is convenient to be led out later and then tensioned later, so as to promote the centripetal bending stress of the sleeve body 300.
Referring to fig. 7 and 8, it is understood that, since the glass fiber board 100 generates a pre-tension in a warp direction based on the high strength mesh cloth 102 inside thereof, when the glass fiber board 100 is bent from a planar state to surround a column to be reinforced, the glass fiber board 100 generates a centripetal bending stress based on the pre-tension in a warp direction to self-curl, thereby greatly reducing construction difficulty, and particularly, for a column to be reinforced of a small cross-sectional size, the glass fiber board 100 can be self-curled to pinch the column to be reinforced.
Compared with the prior art, the glass fiber sleeve provided by the embodiment has the advantages that the glass fiber plate 100 formed by clamping the high-strength grid cloth 102 by utilizing the multi-layer glass fiber cloth 101 is respectively connected with the self-locking anchors 200 at two ends to form the sleeve body 300, the high-strength grid cloth 102 with the elastic modulus far higher than that of the glass fiber cloth 101 can be utilized to improve the overall bearing capacity, and the warp-wise pretightening force applied by the high-strength grid cloth 102 is utilized to enable the glass fiber plate 100 to obtain centripetal bending stress when being bent, so that the difficulty of bending and encircling the glass fiber plate 100 to a column to be reinforced can be reduced, the reinforcing construction of the column to be reinforced with smaller cross section size can be facilitated, and the limiter arranged on the inner wall of the sleeve body 300 can be abutted against the column to be reinforced by utilizing the centripetal bending stress obtained by the sleeve body 300, so that the consistency of the circumferential thickness of a grouting annular cavity is improved, the grouting thickness is ensured to be uniform, the occurrence of hollowness phenomenon is avoided, and the combination between the sleeve body 300 and the slurry and the column to be reinforced is more reliable and stable, so that the compressive bearing capacity and the reinforcing effect of the column to be reinforced after the reinforcing is finished are improved.
In some embodiments, referring to fig. 2 and 3, high strength scrim 102 comprises a plurality of warp yarns 1021; each warp 1021 is a high-strength wire with warp pretension applied, and two ends of each warp 1021 are respectively connected with two self-locking anchors 200.
Specifically, the high-strength mesh cloth 102 can be formed by connecting high-strength wires in the warp direction and fiber tows in the weft direction into a mesh shape in a warp and weft interweaving mode, wherein the high-strength wires are mainly used for bearing warp tensioning to obtain warp pretension, and the fiber tows in the weft only need to play a role in connection to ensure uniform gaps among the high-strength tows in the warp direction, so that cost can be reduced, meanwhile, only the high-strength tows in the warp direction need to be tensioned, the whole Zhang Lagao Jiang Wangge cloth 102 is not needed, on one hand, the tensioning difficulty can be reduced, on the other hand, the high-strength mesh cloth can be conveniently connected with the self-locking anchor 200, and the difficulty of further applying the warp pretension to the glass fiber plate 100 in later construction is reduced.
As an embodiment of the self-locking anchor 200, referring to fig. 2, 3 and 5, two self-locking anchors 200 are disposed back-to-back and each comprise an anchor portion 201 and a connecting portion 202; the anchoring portion 201 has a clamping groove 2011 adapted for the end of the glass fiber board 100 to extend into and be anchored, the two connecting portions 202 are connected by a plurality of adjustable connectors 500, and each warp 1021 is correspondingly connected with each adjustable connector 500; the adjustable connector 500 is used to tension two self-locking anchors 200 and also to tension each warp 1021.
The self-locking anchorage 200 forms an L-shaped structure based on the anchoring portion 201 and the connecting portion 202, the two self-locking anchorage 200 are arranged back to back, the two ends of the glass fiber board 100 are respectively connected by the anchoring portion 201 deviating from each other, then the two connecting portions 202 are connected by the adjustable connecting piece 500, the two connecting portions 202 are mutually abutted to bend the glass fiber board 100 into a cylinder shape, namely, the sleeve body 300 is formed, at the moment, if centripetal bending stress of the sleeve body 300 is insufficient, when a limiter arranged on the inner wall of the sleeve body 300 is fully abutted to a cylinder to be reinforced, each warp 1021 can be continuously tensioned through each adjustable connecting piece 500, so that the warp pretension inside the glass fiber board 100 is increased, the centripetal bending stress of the glass fiber board 100 in a bending state is increased until the limiter is fully abutted to the peripheral wall of the cylinder to be reinforced, and therefore, the consistency of the circumferential thickness of a grouting annular cavity is ensured, and the compressive bearing capacity and the reinforcing effect of the whole reinforcing system are improved.
The specific anchoring connection mode of the glass fiber board 100 and the anchoring portion 201 may be that the end portion of the glass fiber board 100 is coated with an adhesive such as epoxy resin adhesive and then penetrates into the clamping groove 2011, then a fixing piece such as self-tapping is screwed onto the anchoring portion 201, the self-tapping is utilized to penetrate through the end portion of the glass fiber board 100 extending into the clamping groove 2011, so that the anchoring reliability of the glass fiber board 100 in the clamping groove 2011 is ensured, and the anchor dropping phenomenon is avoided.
In some possible implementations, referring to fig. 3 and fig. 5, the connecting portions 202 are provided with a plurality of through holes 2021 and a plurality of threaded holes 2022 at intervals along the axial direction of the column to be reinforced, each through hole 2021 and each threaded hole 2022 are sequentially and crosswise distributed, and each threaded hole 2022 on one connecting portion 202 corresponds to each through hole 2021 on the other connecting portion 202 one by one; each adjustable connecting piece 500 passes through each through hole 2021 correspondingly and is in threaded connection with a corresponding threaded hole 2022, and each warp 1021 is connected to one end, away from the threaded hole 2022, of the adjustable connecting piece 500 correspondingly.
Considering that the warp 1021 distribution density of the high-strength mesh cloth 102 is relatively high, through arranging the threaded holes 2022 and the through holes 2021 which are mutually crossed and spaced on the two connecting parts 202 respectively, each adjustable connecting piece 500 can be sequentially crossed and screwed in the threaded holes 2022 of the two connecting parts 202, so that the two ends of the high-strength mesh cloth 102 can obtain uniform tensile force values, the problem of unbalanced stress at the two ends caused by pre-tightening of only one end of the high-strength mesh cloth 102 is avoided, meanwhile, the arrangement of the adjustable connecting pieces 500 can be facilitated, and the sufficient operation space of each adjustable connecting piece 500 is ensured, so that the operation difficulty is reduced.
The adjustable connecting piece 500 may be a component capable of performing axial telescopic adjustment, after the adjustable connecting piece 500 is alternately connected to the threaded holes 2022 on the two connecting portions 202, the sleeve body 300 can be closed to form self-locking fixation, and then the axial telescopic operation of each adjustable connecting piece 500 can be used for adjusting the warp pretension, so that the tight hoop effect of the sleeve body 300 and the column to be reinforced is achieved, and the compressive bearing capacity and the reinforcing effect of the structure are improved.
For example, referring to fig. 3 and 6, the adjustable connector 500 includes a connecting sleeve 501 and an adjusting post 502, where the adjusting post 502 is inserted through the connecting sleeve 501 and is screwed with the connecting sleeve 501, and the connecting sleeve 501 passes through the through hole 2021 and is screwed with the corresponding threaded hole 2022; wherein the warp 1021 is connected with the adjustment column 502.
The outer peripheral wall of the connecting sleeve 501 is provided with external threads, the inner peripheral wall is provided with internal threads, the connecting sleeve 501 is connected with a threaded hole 2022 through the external threads, the adjusting column 502 can be a screw, the adjusting column 502 penetrates into the connecting sleeve 501 to be in threaded fit with the internal threads, an anchor hole can be formed in the adjusting column 502, a wedge block and an adhesive can be matched to penetrate into the anchor hole to be anchored and fixed with the adjusting column 502 when the warp 1021 is connected, the connecting sleeve 501 penetrates through the through hole 2021 and then is connected with the corresponding threaded hole 2022, self-locking fixation of the sleeve body 300 can be achieved, meanwhile, the adjusting column 502 can be further tensioned by continuing to rotate so as to improve the abutting reliability of a limiter and a column to be reinforced, the problem of hollowness is avoided, and the consistency of the circumferential grouting thickness of the column to be reinforced is guaranteed.
It should be noted that, referring to fig. 3 and 5, the anchoring portion 201 has a plurality of through holes 2012 distributed at intervals along the axial direction of the column to be reinforced, each through hole 2012 corresponds to a position of each through hole 2021 and is communicated with the clamping slot 2011, each through hole 2012 corresponds to a plurality of warp threads 1021, ends of each warp thread 1021 corresponding to the same through hole 2012 are interwoven to form twisting heads 1020, and each twisting head 1020 passes through each through hole 2012 and is connected with the corresponding adjustable connector 500.
Because the warp 1021 interval of the high-strength mesh cloth 102 is smaller, especially for the glass fiber board 100 with the multi-layer high Jiang Wangge cloth 102, a plurality of warp 1021 are generally distributed at the same position capable of accommodating the adjustable connecting piece 500, and therefore, the mode of interweaving the ends of each warp 1021 corresponding to the same perforation 2012 into a twist is adopted, and then the twisting head 1020 penetrates out through the perforation 2012 to be connected with the adjustable connecting piece 500, so that the adjustable connecting piece 500 can be conveniently arranged, and the influence of the self-locking fixation of the sleeve body 300 and the adjustment of the warp pretension during later construction caused by the over-density of the adjustable connecting piece 500 can be avoided.
Based on the same inventive concept, as understood in conjunction with fig. 1 to 11, the embodiment of the present application further provides a glass fiber sleeve preparation method for preparing the glass fiber sleeve, including the following steps:
The number of layers of the glass cloth 101 and the high-strength mesh cloth 102 was calculated. The number of layers of the glass fiber cloth 101 and the high-strength mesh cloth 102 required can be obtained by calculating according to the compressive bearing capacity value required to be lifted by the column to be reinforced and the elastic modulus of the glass fiber cloth 101 and the high-strength mesh cloth 102, wherein the glass fiber cloth 101 is arranged on the surfaces of two sides of the glass fiber board 100 in order to ensure that the glass fiber sleeve has the performances of seawater resistance, chemical resistance, acid resistance and alkali corrosion resistance, and the number of layers of the glass fiber cloth 101 is necessarily at least one layer greater than that of the high-strength mesh cloth 102.
Tension anchors 60 are respectively mounted at the two ends of the single-layer high-strength gridding cloth 102 in the warp direction. The tensioning anchor 60 can be a structure that a wedge penetrates into a wedge-shaped groove to clamp the high-strength grid cloth 102, a structure that a curved surface is matched with the wedge-shaped groove to clamp the high-strength grid cloth 102, or a chemical anchor structure that the wedge-shaped groove is bonded and fixed through an adhesive.
Applying a tensioning force to tensioning anchor 60 tightens high tensile scrim 102 with a warp pretension. Two hydraulic traction devices can be adopted to respectively carry out reverse traction on the two tension anchors 60, or a fixed seat is adopted to fix the tension anchor 60 at one end of the high-strength mesh cloth 102, then a hydraulic traction device is matched to carry out tension loading on the tension anchor 60 at the other end of the high-strength mesh cloth 102, and the hydraulic traction device is a tension loading mechanism commonly used in the field and does not limit the specific structure.
At least one layer of glass fiber cloth 101 is respectively stuck to the two side surfaces of the high-strength mesh cloth 102. When the high-strength mesh cloth 102 is in a tightening state based on warp pretension, glue is coated on the surface of the high-strength mesh cloth 102 (the adhesive can be unsaturated polyester, vinyl resin or epoxy resin), or the glass fiber cloth 101 is immersed in glue solution in advance to form prepreg, and then the glass fiber cloth 101 is respectively stuck on the upper surface and the lower surface of the high-strength mesh cloth 102, and the tightening state can ensure that the glue solution can fully permeate the high-strength mesh cloth 102, so that the upper surface and the lower surface of the high-strength mesh cloth 102 can be uniformly coated with a layer of adhesive, and the bonding reliability and bonding force of the high-strength mesh cloth 102 and the glass fiber cloth 101 are improved. It should be noted that the glass fiber cloth 101 on both sides of the high-strength mesh cloth 102 may be one layer, but is not limited to one layer, and may be two or more layers, and thus, at least one glass fiber cloth 101 is provided between adjacent high-strength mesh cloths 102.
If the number of layers of the high-strength mesh cloth 102 is one, the high-strength mesh cloth 102 with the glass fiber cloth 101 adhered to the two sides is heated, solidified and cooled at room temperature, and the tensioning anchor 60 is removed after cooling is completed, so that the glass fiber board 100 is obtained. The glass fiber cloths 101 on the upper and lower surfaces of the high-strength mesh cloth 102 are respectively used as the two side plate surfaces of the glass fiber plate 100, so that the anti-corrosion effect can be improved, specifically, in order to improve the adhesion strength, the heating and curing temperature condition is 80-120 ℃, the air cooling is performed under the room temperature condition after the heating and curing of the adhesive, the air cooling is completed, the hardened glass fiber plate 100 is formed by the high-strength mesh cloth 102 clamped in the middle, and certain self-curling capability is provided.
If the number of layers of the high-strength mesh cloth 102 is multiple, a second layer of high-strength mesh cloth 102 provided with a tensioning anchor 60 is paved on the glass fiber cloth 101 adhered to one side of the first layer of high-strength Jiang Wangge cloth 102, tensioning force is applied to the tensioning anchor 60 to enable the second layer of high-strength mesh cloth 102 to obtain warp pretension and tightly adhere to the glass fiber cloth 101, at least one layer of glass fiber cloth 101 is adhered to the exposed surface of the second layer of high-strength mesh cloth 102, heating and solidifying are sequentially repeated until the number of layers of the glass fiber cloth 101 and the high-strength mesh cloth 102 is consistent with the calculated number of layers, cooling is carried out at room temperature, and the tensioning anchor 60 is removed after cooling is completed, so that the glass fiber board 100 is obtained. According to the situation that two layers or more than two layers of high Jiang Wangge cloth 102 are needed, lamination and adhesion are sequentially carried out according to the adhesion mode, and finally, the fact that glass fiber cloth 101 is arranged on two side plate surfaces of the glass fiber plate 100 and at least one layer of glass fiber cloth 101 is arranged between every two adjacent high-strength grid cloths 102 is guaranteed, and therefore the overall corrosion resistance and the connection strength between every two adjacent high-strength grid cloths 102 are improved.
The two ends of the glass fiber board 100 are respectively anchored with the self-locking anchors 200 and form the sleeve body 300 after the two self-locking anchors 200 are connected. It should be noted that this step may be performed at the construction site, or may be performed directly after the glass fiber board 100 is formed, and for convenience of transportation, it may be preferable to use a mode of transporting the glass fiber board 100 and forming the sleeve body 300 around the column to be reinforced after installing the self-locking anchors 200 at both ends at the construction site.
Compared with the prior art, the glass fiber sleeve preparation method provided by the invention has the advantages that the glass fiber plate 100 clamped with the high-strength grid cloth 102 can be obtained, the glass fiber plate 100 is connected with each other through the self-locking anchors 200 at the two ends of the glass fiber plate 100 to form the sleeve body 300, the high-strength grid cloth 102 with the elastic modulus far higher than that of the glass fiber cloth 101 can be utilized to improve the overall bearing capacity, and the radial pre-tightening force applied by the high-strength grid cloth 102 is utilized to enable the glass fiber plate 100 to obtain the centripetal bending stress when the glass fiber plate 100 is bent, so that the difficulty of bending and encircling the glass fiber plate 100 to the column to be reinforced can be reduced, the reinforcement construction of the column to be reinforced with smaller cross section size can be facilitated, and the limiter arranged on the inner wall of the sleeve body 300 can be abutted against the column to be reinforced by utilizing the centripetal bending stress obtained by the sleeve body 300, so that the circumferential thickness consistency of a grouting annular cavity is improved, the grouting thickness is ensured to be uniform, the occurrence of a blank phenomenon is avoided, the combination between the sleeve body 300 and the column to be reinforced, and the bearing capacity to be reinforced after the reinforcement is completed is improved.
In some embodiments, the calculating the number of layers of the fiberglass cloth 101 and the high-strength scrim 102 includes:
And determining an axial pressure value which can be achieved after the column to be reinforced is reinforced. The axial pressure value is understood to be the desired reinforcement force value, i.e. it is directly determined according to the required load capacity of the column to be reinforced after the reinforcement is completed, and is understood to be a known quantity.
According to the axial pressure value, the single-layer tensile resistance value of the glass fiber cloth 101 and the single-layer tensile resistance value of the high-strength mesh cloth 102, calculating to obtain the number of layers of the glass fiber cloth 101 and the number of layers of the high-strength mesh cloth 102; wherein the number of layers of the glass fiber cloth 101 is more than that of the high-strength mesh cloth 102.
The single-layer tensile resistance value and the elastic modulus of the glass fiber cloth 101 and the high-strength mesh cloth 102 can be obtained by test of a sample, also belong to known quantity, the single-layer tensile resistance value of the glass fiber cloth 101 is multiplied by the number of layers of the glass fiber cloth, and the single-layer tensile resistance value of the high-strength mesh cloth 102 is multiplied by the number of layers of the glass fiber cloth, so that the total tensile resistance value can be increased to the total tensile resistance value of a cylinder to be reinforced, the axial pressure value of the cylinder to be reinforced can be converted into the radial force of the cylinder to be reinforced for axial compression collision, and therefore, the total tensile resistance value and the axial pressure value are replaced as equivalent values or based on a mechanical principle, so that the number of layers is determined; in addition, because glass fiber cloth 101 is required to be adopted on both side surfaces of the glass fiber board 100 based on the protection requirements of seawater resistance, chemical resistance, acid resistance and alkali resistance, the number of layers of the glass fiber cloth 101 is more than at least one layer of the high-strength mesh cloth 102, and if the high-strength mesh cloth 102 is more than two layers, at least one layer of the glass fiber cloth 101 is arranged between the high-strength mesh cloths 102 of adjacent layers, and the number of layers of the glass fiber cloth 101 and the high-strength mesh cloth 102 can be obtained based on the above conditions.
Of course, it should be understood herein that the number of layers of the glass fiber cloth 101 and the number of layers of the high-strength mesh cloth 102 determined based on the above two conditions are not unique, and thus any result satisfying the above conditions may be selected.
For example, the following is precisely calculated by using the glass fiber cloth 101 as each layer of the glass fiber board 100 (i.e. the condition that the high-strength mesh cloth 102 is not mixed in, and the condition meets the requirement of the "GB50367-2013 concrete structure reinforcement design specification"):
firstly, determining effective constraint stress according to an axial pressure value, an original axle center compressive strength design value of a column to be reinforced, a tensile/compressive strength design value of a tensile/compressive reinforcing steel bar in the column to be reinforced and a cross-sectional area of the tensile/compressive reinforcing steel bar in the column to be reinforced;
Then, the number of layers of the glass fiber cloth 101 is calculated based on the effective constraint stress, the concrete strength influence coefficient, the effective constraint coefficient, the volume ratio of the sleeve body 300, the elastic modulus of the glass fiber cloth 101, and the effective tensile strain design value.
Specifically, the method comprises a first calculation formula: n is less than or equal to 0.9[ (f c0+4σl)Acor+f'y0A's0 ]
And a calculation formula II: sigma (sigma) l＝0.5βckcρfEfεfe
Wherein N is an axial pressure value which can be reached after the column to be reinforced is reinforced;
f c0 is the original axle center compressive strength design value of the column to be reinforced;
σ l is the effective constraint stress of the reinforcement system on the column to be reinforced;
a cor is the cross-sectional area of the column to be reinforced after the reinforcement is completed; wherein for a circular cross section For square and rectangular cross sections: a cor＝bh-(4-π)r2;
d is the diameter of the circular section;
B is the side length of the square section or the width of the rectangular section;
B is the height of the rectangular section;
r is the corner rounding radius of a square section or a rectangular section;
f' y0 is the design value of the tensile/compressive strength of the tensile/compressive reinforcement in the column to be reinforced;
A' s0 is the cross-sectional area of the tensile/compressive reinforcement in the column to be reinforced;
Beta c is the concrete strength influence coefficient adopted by the column to be reinforced; wherein, when the concrete strength grade is not greater than C50, β c =1.0; when the concrete strength grade is C80, β c =0.8; when the strength grade of the concrete is in the range from C50 to C80, beta c is determined according to a linear interpolation method;
k c is an effective constraint coefficient of the reinforcement system for circumferential beam surrounding of the column to be reinforced;
ρ f is the volume ratio of the reinforcing system, i.e. the sleeve body 300;
e f is the elastic modulus of the glass cloth 101;
epsilon fe is the effective tensile strain design value of the glass cloth 101; wherein, if the column to be reinforced is an important component of a building, 0.0035 is taken, and if the column to be reinforced is a general component of the building, 0.0045 is taken;
For k c, if the column to be reinforced is a circular section, taking 0.95; if the column to be reinforced is square or rectangular, determining according to a calculation formula III: Wherein ρ s is the reinforcement ratio of the longitudinal steel bar in the column to be reinforced.
For ρ f, if the column to be reinforced is a circular sectionIf the column to be reinforced is square or rectangularWhere n f is the number of layers of the glass fiber cloth 101, and t f is the thickness of the glass fiber cloth 101.
Since the above parameters are all body parameters (known parameters) of the column to be reinforced except E f、nf、tf, the values of the number of layers N f and t f of the glass fiber cloth 101 can be calculated based on the above-determined N value and the elastic modulus E f of the glass fiber cloth 101.
On the basis of the above, since the elastic modulus of the high-strength mesh cloth 102 is far greater than that of the glass fiber cloth 101 (taking a high-strength steel wire mesh cloth as an example, the elastic modulus is 190Gpa, and the glass fiber cloth 101 is 15-20 Gpa), that is, the tensile strength value of the single-layer high-strength mesh cloth 102 is equivalent to that of about ten layers of glass fiber cloth 101, so that the high-strength mesh cloth 102 can replace part of the glass fiber cloth 101 to obtain a reinforcing effect at least equivalent to that of all glass fiber cloth 101, in a specific alternative mode, theoretically, each layer of high Jiang Wangge cloth 102 can replace not more than ten layers of glass fiber cloth 101 (if the number of replacing layers is less than ten, the axial bearing capacity can be further improved on the basis of obtaining the axial pressure value meeting the requirement, and the reinforcing effect is improved), therefore, by arranging the high-strength mesh cloth 102 in the middle layer, not only can reduce the bending difficulty of the glass fiber plate 100 by using the warp pretension, and can make the glass fiber sleeve possess the active pretension based on the centripetal bending stress, but also can improve the compressive bearing capacity of the glass fiber sleeve.
Optionally, the tensioning anchor 60 in this embodiment has a structure that the tensioning anchor 60 includes a seat plate 601, a pressure plate 602, and a plurality of fasteners; a plurality of first connecting holes 6011 are distributed on the seat board 601 in an array manner, and the top surface of the seat board 601 comprises a first curved surface section 6012 and a first tooth line section 6013; the pressing plate 602 is covered on the seat plate 601, a plurality of second connecting holes 6021 are distributed on the pressing plate 602 in an array manner, and the bottom surface of the pressing plate 602 comprises a second curved surface section 6022 and a second tooth section 6023; each fastener passes through each second connecting hole 6021 and is screwed with each first connecting hole 6011; wherein, the pressing plate 602 and the seat plate 601 are matched to clamp the high-strength mesh fabric 102, the first curved surface section 6012 and the second curved surface section 6022 are correspondingly embedded, and the first insection section 6013 and the second insection section 6023 are correspondingly embedded.
The first curved surface segment 6012 and the second curved surface segment 6022 may be sine wave curved surfaces which are matched with each other and have gradually increased curvatures from front to back, the smaller curvature at the front end can avoid stress concentration of the high-strength mesh cloth 102 in the area penetrating out of the tensioning anchor 60, meanwhile, the acting force of the whole curved surface meshing area can be fully exerted, the clamping force balance of the whole clamping area on the high-strength mesh cloth 102 is improved, and in order to avoid shearing force generated by the high-strength mesh cloth 102 at the boundary of the extending position of the tensioning anchor 60, the front end edges of the pressing plate 602 and the seat plate 601 can be provided with chamfers; the first insection section 6013 and the second insection section 6023 are mutually meshed, so that the high-strength mesh cloth 102 can be thoroughly anchored, the anchor release risk is reduced, and specifically, the first insection section 6013 and the second insection section 6023 can adopt tooth-shaped structures with the depth of 2mm and the tooth tip angle of 60-120 degrees. The front end of the tension anchor 60 refers to the extending end of the high-strength mesh cloth 102, and the end of the two tension anchors 60 away from each other is the rear end of the two tension anchors.
The fastener may specifically be a bolt, and the bolt passes through the second connecting hole 6021 on the pressing plate 602 and then is screwed and fixed with the first connecting hole 6011 on the seat plate 601, so that a clamping force is formed between the pressing plate 602 and the seat plate 601 to anchor the end of the high-strength mesh cloth 102; the connection sequence of the fasteners can be in a mode of screwing the fasteners from front to back, and the fastening force applied by the fasteners from front to back is gradually increased, so that the anchoring force balance of the whole action area of the pressing plate 602 and the seat plate 601 to the high-strength mesh cloth 102 is improved.
Based on the same inventive concept, with reference to fig. 1 to 11, the embodiment of the application further provides a glass fiber sleeve construction method, which adopts the glass fiber sleeve to perform reinforcement construction on a cylinder to be reinforced, and comprises the following steps:
Cutting the glass fiber board 100, respectively installing the self-locking anchors 200 at two ends of the glass fiber board 100 to form an unfolded sleeve body 300, and leading out warp 1021 of the high-strength grid cloth 102 to be connected with the adjustable connecting piece 500 of the self-locking anchors 200. After the sleeve body 300 is prepared, the glass fiber board 100 is kept to be transported to a construction site, so that the transportation difficulty and the cost can be reduced, the self-locking anchor 200 and the glass fiber board 100 are assembled into a whole at the construction site, and at the moment, the two self-locking anchors 200 are not connected, so that the sleeve body 300 in an unfolded state is formed, and components such as a limiter and a sealing strip can be conveniently installed on the inner wall of the sleeve; warp 1021 of high-strength mesh fabric 102 is interwoven into a twisting head 1020 by a plurality of pieces and penetrates out of perforation 2012 on self-locking anchorage 200, and then the penetrated twisting head 1020 is anchored to adjustable connecting piece 500 on the corresponding position, so that the operation is simple and the construction operation is convenient.
A sealing strip is installed at the bottom of the unfolded sleeve body 300, and a stopper is installed at the inner surface of the unfolded sleeve body 300. The sleeve body 300 can be in an unfolding state when the sealing strip and the limiter are installed, so that the operation is convenient; specifically, the mounting mode of the sealing strip can be that holes are punched at intervals in the circumferential direction at a position five centimeters away from the lower end of the sleeve body 300, the hole distance is preferably 15-20 cm, and then the metal wire perforation 2012 is used for binding and fixing the sealing strip; the function of the limiter is to support the sleeve body 300 to ensure the uniformity of grouting annular gaps, so that the circumferential grouting thickness of the column to be reinforced is improved to be uniform, the limiter can be fixed with the inner surface of the sleeve body 300 in an adhering mode, and meanwhile, the adhesive used for adhering the limiter can be selected to be fast-setting in order to improve the construction efficiency.
The unfolded sleeve body 300 surrounds the column to be reinforced, two self-locking anchors 200 are connected through each adjustable connecting piece 500, and the centripetal bending stress of the sleeve body 300 is increased by adjusting the adjustable connecting pieces 500, so that the limiter abuts against the surface of the column to be reinforced, and a grouting annular cavity is formed. The warp pretension on each warp 1021 after bending the glass fiber board 100 can generate centripetal bending stress, so that the glass fiber board 100 surrounds the column to be reinforced to complete self-rolling, a final operator connects the two self-locking anchors 200 through each adjustable connecting piece 500, and adjusts each adjustable connecting piece 500 as required after connection is completed to increase the tensioning acting force of the warp 1021, so that each limiter can tightly press against the column to be reinforced (the adjusting mode of the adjustable connecting piece 500 is the same as that of the adjusting process, and the description is omitted), the warp pretension can be adjusted at any time in the construction process, active reinforcement of the column to be reinforced can be realized, the compressive bearing capacity and the reinforcing effect are improved, the sleeve body 300 is not required to be additionally provided with a fastening belt to increase the pretension in a hoop manner after construction is completed, and thus the construction steps can be simplified, and the construction period is shortened.
Grouting slurry into the grouting annular cavity, and capping and maintaining after the slurry is solidified. After construction is completed, a reinforcing system of sequentially laminating glass fiber cloth 101, high-strength grid cloth 102 and glass fiber cloth 101 is formed for the column to be reinforced, and the high-strength grid cloth 102 is subjected to tensioning treatment to have centripetal bending internal stress, so that the column to be reinforced can be better attached to the column to be reinforced, the hollowing phenomenon is avoided, and meanwhile, the axial compressive bearing capacity and the reinforcing effect can be improved by utilizing the radial pretension perpendicular to the axial direction of the column to be reinforced; the concrete grouting and capping maintenance processes in this embodiment are all of the prior art, and will not be described in detail herein.
Compared with the prior art, the glass fiber sleeve construction method provided by the invention has the advantages that the glass fiber sleeve is adopted for reinforcement construction, the radial pretension of the high-strength grid cloth 102 is utilized to enable the glass fiber plate 100 to generate centripetal bending stress when being bent, so that bending operation difficulty of a cylinder to be reinforced with smaller cross section size is reduced, simultaneously, the two self-locking anchors 200 are connected by the adjustable connecting piece 500 to realize self-locking fixation, the construction difficulty is further reduced, simultaneously, warp 1021 of the high-strength grid cloth 102 is also subjected to radial pretension adjustment by the adjustable connecting piece 500, so that the limiter arranged in the sleeve body 300 is enabled to abut against the cylinder to be reinforced, the consistency of the circumferential thickness of a grouting annular cavity is improved, the uniform grouting thickness is ensured, the occurrence of hollowness phenomenon is avoided, the combination between the sleeve body 300 and slurry, the slurry and the cylinder to be reinforced is more reliable and stable, and the compression bearing capacity and the reinforcement effect of the cylinder to be reinforced are improved.
The foregoing description of the preferred embodiments of the invention is not intended to be limiting, but rather is intended to cover all modifications, equivalents, and alternatives falling within the spirit and principles of the invention.
Claims (10)
1. The glass fiber sleeve is characterized by comprising a glass fiber plate and two self-locking anchors which are respectively anchored at two ends of the glass fiber plate, wherein the glass fiber plate is used for bending around a cylinder to be reinforced and is connected through the two self-locking anchors to form a sleeve body, and a grouting annular cavity is formed between the inner wall of the sleeve body and the peripheral wall of the cylinder to be reinforced; the glass fiber board comprises at least two layers of glass fiber cloth and at least one layer of high Jiang Wangge cloth, and at least one layer of glass fiber cloth is adhered to two sides of each layer of high-strength grid cloth;
Each layer of high-strength grid cloth is applied with a warp-direction pretension, and the warp-direction pretension is used for enabling the glass fiber board to generate centripetal bending stress when the sleeve body is formed around the cylinder to be reinforced.
2. The glass fiber sleeve according to claim 1, wherein the high-strength mesh cloth comprises a plurality of warps, each of the warps is a high-strength wire with the warp pretension applied, and two ends of each of the warps are respectively connected with two self-locking anchors.
3. The fiberglass sleeve of claim 2, wherein two of said self-locking anchors are disposed back-to-back and both comprise an anchor portion and a connecting portion; the anchoring part is provided with a clamping groove which is suitable for the end part of the glass fiber plate to extend into and anchor, the two connecting parts are connected through a plurality of adjustable connecting pieces, and each warp is correspondingly connected with each adjustable connecting piece; the adjustable connecting piece is used for tensioning the two self-locking anchors and tensioning each warp.
4. The glass fiber sleeve according to claim 3, wherein the connecting part is provided with a plurality of through holes and a plurality of threaded holes at intervals along the axial direction of the column to be reinforced, each through hole and each threaded hole are sequentially distributed in a crossing way, and each threaded hole on one connecting part corresponds to each through hole on the other connecting part one by one; each adjustable connecting piece passes through each through hole correspondingly and is in threaded connection with the corresponding threaded hole, and each warp thread is connected to one end, far away from the threaded hole, of the adjustable connecting piece correspondingly.
5. The glass fiber sleeve according to claim 4, wherein the adjustable connecting piece comprises a connecting sleeve and an adjusting column, the adjusting column penetrates through the connecting sleeve and is in threaded connection fit with the connecting sleeve, and the connecting sleeve penetrates through the through hole and is in threaded connection fit with the corresponding threaded hole; wherein, warp with adjust the post and be connected.
6. The glass fiber sleeve according to claim 4, wherein the anchoring portion is provided with a plurality of perforations at intervals along the axial direction of the column to be reinforced, each perforation corresponds to a position of each through hole and is communicated with the clamping groove, each perforation corresponds to a plurality of warps, ends of each warp corresponding to the same perforation position are interwoven to form twisting heads, and each twisting head passes through each perforation and is connected with the corresponding adjustable connecting piece.
7. A method for preparing a glass fiber sleeve, characterized in that it is used for preparing a glass fiber sleeve according to any one of claims 1 to 6, comprising the following steps:
calculating to obtain the number of layers of the glass fiber cloth and the high-strength mesh cloth;
tensioning anchors are respectively arranged at two ends of the warp direction of the single-layer high-strength grid cloth;
Applying a tensioning force to the tensioning anchor to make the high-strength grid cloth obtain a warp pretension for tensioning;
Respectively sticking at least one layer of glass fiber cloth on the two side surfaces of the high-strength grid cloth;
If the number of layers of the high-strength mesh cloth is one, heating, solidifying and cooling the high-strength mesh cloth with the glass fiber cloth adhered to the two sides at room temperature, and dismantling the stretching anchorage after cooling is finished to obtain the glass fiber board;
If the number of layers of the high-strength mesh cloth is multiple, paving a second layer of the high-strength mesh cloth provided with the tensioning anchor on the glass fiber cloth adhered to one side of a first layer of the high-strength mesh cloth, applying tensioning force to the tensioning anchor to enable the second layer of the high-strength mesh cloth to obtain warp pretension and tightly adhered to the glass fiber cloth, adhering at least one layer of the glass fiber cloth to the exposed surface of the second layer of the high-strength mesh cloth, and sequentially repeating until the number of layers of the glass fiber cloth and the high-strength mesh cloth is consistent with the calculated number of layers, heating, solidifying and cooling at room temperature, and dismantling the tensioning anchor after cooling is completed to obtain the glass fiber board;
and respectively anchoring the two ends of the glass fiber plate with self-locking anchors and forming the glass fiber sleeve after the two self-locking anchors are connected.
8. The method for manufacturing a glass fiber sleeve according to claim 7, wherein the calculating the number of layers of the glass fiber cloth and the high-strength mesh cloth comprises:
determining an axial pressure value which can be achieved after the column to be reinforced is reinforced;
According to the axial pressure value, the single-layer tensile resistance value of the glass fiber cloth and the single-layer tensile resistance value of the high-strength mesh cloth, calculating to obtain the number of layers of the glass fiber cloth and the number of layers of the high-strength mesh cloth; wherein the number of layers of the glass fiber cloth is more than that of the high-strength mesh cloth.
9. The method of making a fiberglass sleeve of claim 7, wherein said tensioning anchor comprises:
the seat board is provided with a plurality of first connecting holes in an array mode, and the top surface of the seat board comprises a first curved surface section and a first insection section;
the pressing plate is covered on the seat plate, a plurality of second connecting holes are distributed in the pressing plate array, and the bottom surface of the pressing plate comprises a second curved surface section and a second tooth line section;
a plurality of fasteners respectively penetrating through the second connecting holes and being screwed with the first connecting holes;
The pressing plate and the seat plate are matched and clamped to form the high-strength mesh cloth, the first curved surface section and the second curved surface section are correspondingly embedded, and the first insection section and the second insection section are correspondingly embedded.
10. The glass fiber sleeve construction method is characterized in that the glass fiber sleeve as claimed in any one of claims 1 to 6 is adopted to carry out reinforcement construction on the cylinder to be reinforced, and the method comprises the following steps:
cutting the glass fiber board, respectively installing the self-locking anchors at two ends of the glass fiber board to form the unfolded sleeve body, and leading out warp threads of the high-strength mesh cloth to be connected with an adjustable connecting piece of the self-locking anchors;
installing a sealing strip at the bottom of the unfolded sleeve body, and installing a limiter on the inner surface of the unfolded sleeve body;
The unfolded sleeve body surrounds the cylinder to be reinforced, two self-locking anchors are connected through each adjustable connecting piece, and centripetal bending stress of the sleeve body is increased by adjusting the adjustable connecting pieces, so that the limiters are abutted against the surface of the cylinder to be reinforced, and the grouting annular cavity is formed;
and pouring slurry into the grouting annular cavity, and performing capping construction and maintenance after the slurry is solidified.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202410679683.1A CN118422606A (en) | 2024-05-29 | 2024-05-29 | Glass fiber sleeve and preparation and construction methods thereof |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202410679683.1A CN118422606A (en) | 2024-05-29 | 2024-05-29 | Glass fiber sleeve and preparation and construction methods thereof |
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| CN118422606A true CN118422606A (en) | 2024-08-02 |
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| CN202410679683.1A Pending CN118422606A (en) | 2024-05-29 | 2024-05-29 | Glass fiber sleeve and preparation and construction methods thereof |
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| Country | Link |
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| CN (1) | CN118422606A (en) |
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- 2024-05-29 CN CN202410679683.1A patent/CN118422606A/en active Pending
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