CN111335165A - Construction method for sealing anchor and auxiliary anchor sealing structure thereof - Google Patents
Construction method for sealing anchor and auxiliary anchor sealing structure thereof Download PDFInfo
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- CN111335165A CN111335165A CN202010143721.3A CN202010143721A CN111335165A CN 111335165 A CN111335165 A CN 111335165A CN 202010143721 A CN202010143721 A CN 202010143721A CN 111335165 A CN111335165 A CN 111335165A
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- hole
- web
- web plate
- grouting
- notch
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- E—FIXED CONSTRUCTIONS
- E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
- E01D—CONSTRUCTION OF BRIDGES, ELEVATED ROADWAYS OR VIADUCTS; ASSEMBLY OF BRIDGES
- E01D21/00—Methods or apparatus specially adapted for erecting or assembling bridges
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- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04G—SCAFFOLDING; FORMS; SHUTTERING; BUILDING IMPLEMENTS OR AIDS, OR THEIR USE; HANDLING BUILDING MATERIALS ON THE SITE; REPAIRING, BREAKING-UP OR OTHER WORK ON EXISTING BUILDINGS
- E04G21/00—Preparing, conveying, or working-up building materials or building elements in situ; Other devices or measures for constructional work
- E04G21/12—Mounting of reinforcing inserts; Prestressing
- E04G21/121—Construction of stressing jacks
Abstract
The invention is suitable for the technical field of bridge construction, and provides an anchor sealing construction method and an auxiliary anchor sealing structure thereof. The invention provides a construction method of an anchor seal, which comprises the following steps: a prestressed duct and a notch are arranged in a web plate, and a steel strand penetrating through the prestressed duct is arranged in the web plate; grouting holes and exhaust holes which are arranged at intervals are formed in the web plate; pre-stressed tension is carried out on the steel beam and the steel beam is anchored on an anchorage device, and vacuum-assisted grouting is adopted to perform grouting in the pre-stressed duct; concrete is poured into the groove to seal and protect the anchorage device. Compared with the traditional mode of pouring concrete from bottom to top, the construction method provided by the invention has the advantages that the construction is simple, the concrete pouring in the groove is more compact, and the construction quality is guaranteed.
Description
Technical Field
The invention belongs to the technical field of bridge construction, and particularly relates to an anchor sealing construction method and an auxiliary anchor sealing structure thereof.
Background
As one kind of bridge engineering center sill, the box girder includes two parts, web and bottom board, which are basically vertical and have hollow inside and flanges on two sides. In the construction process of the cast-in-place prestressed concrete continuous box girder bridge, after anchoring of tensioning of the prestressed steel bundles in the web plate is completed, anchor sealing operation is required, namely grouting is started in a pore channel where the prestressed steel bundles are located after tensioning of the steel bundles is completed, after the concrete reaches a certain strength, the steel bundles located on the outer side of the box girder web plate are trimmed, reinforcing steel bars are bound at the position of an anchor, a template is installed, and the anchor is wrapped in the concrete.
When the prestressed steel beam is anchored on the bottom surface of the web plate, the traditional anchor sealing method is to directly seal the anchor from the bottom surface by pouring concrete into the notch where the anchor of the prestressed steel beam is located from bottom to top, and the method has the following problems: on the one hand, the construction is more difficult, and on the other hand, because the mode of up pouring concrete is down adopted, the inslot concrete is not closely knit easily, and the problem that construction quality is difficult to guarantee.
Disclosure of Invention
In view of this, the embodiment of the present invention provides an anchor sealing construction method, so as to solve the technical problem how to make concrete pouring dense when the anchor sealing construction is performed on the bottom surface of a web plate of a box girder bridge.
In order to solve the above problems, the technical solution of the embodiment of the present invention is implemented as follows:
the embodiment of the invention provides a construction method for sealing an anchor, which comprises the following steps: the method comprises the following steps that a prestressed duct is formed in a web plate, the prestressed duct penetrates through the web plate along the length direction of the web plate, one end of the web plate in the length direction is provided with a notch communicated with the prestressed duct, a steel strand penetrates through the prestressed duct, one end of the steel strand is fixed with one end of the web plate, opposite to the notch, and the other end of the steel strand penetrates through the notch and extends out of the web plate; arranging a grouting hole, arranging the grouting hole in the web plate from the outer side surface of the web plate, and communicating the grouting hole with the notch; arranging an exhaust hole, arranging the exhaust hole in the web from the outer side surface of the web, wherein the exhaust hole is communicated with the notch, and the exhaust hole and the grouting hole are arranged at intervals; pre-stressed tensioning and anchoring are carried out on the steel bundles, and vacuum-assisted grouting is adopted to carry out grouting on the pre-stressed duct; and pouring concrete, pouring concrete from the outer side surface of the web plate to the grouting hole, and sealing and protecting the anchorage device in the notch.
Further, the construction method further comprises the following steps: the one end at the notch of the web plate is provided with an anchorage device fixedly connected with the web plate, the anchorage device partially extends into the prestressed pore passage, the anchorage device is provided with an anchorage device through hole, the anchorage device through hole is communicated with the prestressed pore passage, and the steel strand penetrates through the anchorage device through hole and extends out of the web plate.
Further, the exhaust hole opening device further comprises: the outer side face comprises a plurality of side faces, the side face of the web plate where the inlet of the grouting hole is located is provided with the exhaust hole, and the outlet of the exhaust hole and the inlet of the grouting hole are located on the same side face.
Further, the exhaust hole opening device further comprises: the exhaust hole is formed above the grouting hole.
Further, the construction method further comprises the following steps: and removing the part of the steel bundle extending out of the web after the prestressed tensioning before the notch is closed.
Further, the construction method further comprises the following steps: and pouring concrete from the grouting holes in a concrete pumping mode.
Further, the construction method further comprises the following steps: the pumping pressure grade of the pumping concrete is low pressure.
Meanwhile, the embodiment of the invention also provides an auxiliary anchor sealing structure, which comprises the following components: the web plate is internally provided with a prestressed duct, the prestressed duct penetrates through the web plate along the length direction of the web plate, and one end of the web plate in the length direction is provided with a notch communicated with the prestressed duct; the anchorage device is arranged at one end where the notch of the web plate is located and is fixedly connected with the web plate, the anchorage device partially extends into the prestressed pore channel, an anchorage device through hole is formed in the anchorage device, and the anchorage device through hole is communicated with the prestressed pore channel; the steel strand penetrates through the prestressed duct, one end of the steel strand is fixed with one end, opposite to the notch, of the web, and the other end of the steel strand penetrates through the anchor through hole of the anchor and extends out of the web; the outer side surface of the web plate is provided with grouting holes and exhaust holes which are arranged at intervals in the web plate, and the grouting holes and the exhaust holes are communicated with the notch.
Further, the outlet of the exhaust hole is positioned above the inlet of the grouting hole.
Further, the lateral surface includes a plurality of sides, the entry of grout hole with the export of exhaust hole is located the same of web the side.
The construction method for sealing the anchor provided by the embodiment of the invention comprises the following steps: a prestressed duct and a notch are arranged in a web plate, and a steel strand penetrating through the prestressed duct is arranged in the web plate; grouting holes and exhaust holes which are arranged at intervals are formed in the web plate; pre-stress tensioning and anchoring are carried out on the steel bundles, and vacuum-assisted grouting is adopted to carry out grouting on the pre-stress pipeline; and pouring concrete into the grouting hole to seal and protect the anchor in the notch. Compared with the traditional mode of pouring concrete from bottom to top, the construction method provided by the invention has the advantages that the construction is simple, the concrete in the groove is poured more compactly, and the construction quality is guaranteed.
Drawings
In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings needed to be used in the embodiments will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art that other drawings can be obtained based on these drawings without creative efforts.
Fig. 1 is a schematic flow chart of a construction method for sealing an anchor according to an embodiment of the present invention;
FIG. 2 is a schematic flow chart of another anchor sealing construction method according to an embodiment of the present invention;
FIG. 3 is another schematic flow chart of step S103 in FIG. 1;
FIG. 4 is another schematic flow chart of step S105 in FIG. 1;
FIG. 5 is another schematic flow chart of step S105 in FIG. 1;
FIG. 6 is a schematic structural diagram of an auxiliary anchor sealing structure according to an embodiment of the present invention;
FIG. 7 is a cross-sectional view taken at A-A in FIG. 6;
FIG. 8 is a cross-sectional view taken at B-B of FIG. 6;
fig. 9 is a schematic perspective view of an auxiliary anchor sealing structure according to an embodiment of the present invention;
description of reference numerals:
10-a box girder; 11-a web; 111-prestressed ducts; 112-notches; 12-steel strand; 13-grouting holes; 14-a vent hole; 15-an anchorage device; 151-anchor through holes.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is described in further detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.
The individual features described in the embodiments can be combined in any suitable manner without departing from the scope, for example different embodiments and aspects can be formed by combining different features. In order to avoid unnecessary repetition, various possible combinations of the specific features of the invention will not be described further.
In a specific embodiment, the anchor sealing method and the auxiliary anchor sealing structure thereof provided by the invention can be applied to the construction process of various bridge constructions such as railway, highway and municipal bridge engineering, and the following description takes the anchor sealing construction of the cast-in-place prestressed concrete continuous box girder bridge as an example.
As shown in fig. 1, a construction method for sealing an anchor according to an embodiment of the present invention includes the following steps:
s101, a web 11 is arranged, a prestress pore channel 111 is formed in the web 11, the prestress pore channel 111 penetrates through the web 11 along the length direction of the web 11, one end of the length direction of the web 11 is provided with a notch 112 communicated with the prestress pore channel 111, a steel bundle 12 penetrates through the prestress pore channel 111, one end of the steel bundle 12 is fixed with one end of the web 11 opposite to the notch 112, and the other end of the steel bundle 12 penetrates through the notch 112 and extends out of the web 11.
Specifically, as shown in fig. 6 and 9, the box girder 10 is a cast-in-place prestressed concrete box girder, and the box girder 10 includes a web 11 and a bottom plate substantially perpendicular to the web 11, wherein the number of the web 11 may be plural, including but not limited to a middle web and a side web, etc. The prestressed duct 111 is provided in the web 11, and along the length direction of the web 11, the prestressed duct 111 extends from one end surface of the web 11 to the other end surface of the web 11, and the extending direction thereof may be parallel to the plane intersecting the web 11 and the bottom plate, or may form a certain included angle with the plane intersecting the web 11 and the bottom plate. The notch 112 is opened at one end of the web 11 in the length direction and is communicated with the prestressed duct 111, the cross section of the notch 112 may be round, rectangular or trapezoidal, the depth of the notch 112 may be adjusted according to the actual engineering requirements, the steel bundle 12 penetrates the prestressed duct 111, that is, one end of the steel bundle 12 is fixedly embedded in one end of the web 11 opposite to the notch 112, and it should be noted that, the end of the web 11 opposite to the slot 112 refers to the end of the web 11 far from the slot 112 along the extending direction of the prestressed duct 111, and the other end of the steel strand 12 extends to the outside of the web 11 through the slot 112, where the steel strand 12 may be a steel strand woven by parallel steel wires, the specific specification can be determined according to the actual engineering requirements, such as a steel bundle woven by using 20 steel wires with the diameter of 5mm, and the like.
Step S102, forming a grouting hole 13, forming the grouting hole 13 in the web plate 11 from the outer side surface of the web plate 11, and communicating the grouting hole 13 with the notch 112.
After the construction of the web plate 11 of the box girder 10, i.e., the prestressed duct 111 and the notch 112 are formed on the web plate 11 and the steel bundle 12 is arranged, the grouting hole 13 may be formed on the web plate 11.
Specifically, as shown in fig. 7 and 9, the opening position of the inlet of the grouting hole 13 is located on the outer side surface of the web 11, and the opening position is higher than the notch 112 in the height direction of the web 11, so that the grouting hole 13 is communicated with the notch 112, thereby realizing the pouring of concrete from top to bottom. The aperture of the grouting hole 13 can be any value between 15cm and 35cm, such as 15cm, 25cm and 35cm, so that the grouting of concrete can be ensured, the overall strength of the box girder 10 cannot be reduced too much, and stable support is provided for the subsequent bridge construction.
Step S103, arranging an exhaust hole 14, arranging the exhaust hole 14 in the web plate 11 from the outer side surface of the web plate 11, wherein the exhaust hole 14 is communicated with the notch 112, and the exhaust hole 14 and the grouting hole 13 are arranged at intervals.
The exhaust holes 14 may be formed after the grouting holes 13 are formed, or the exhaust holes 14 may be formed after the web 11 of the box girder 10 is formed.
Specifically, as shown in fig. 7 and 9, the opening position of the outlet of the exhaust hole 14 is located on the outer side surface of the web 11, and the opening position may be located on the left side, the right side or above the inlet of the grouting hole 13, and the opening position are spaced apart from each other by a certain distance, during the actual concrete pouring process, if the outlet of the exhaust hole 14 begins to overflow the concrete, it is indicated that the concrete has filled the notch 112, and the concrete pouring work is substantially completed. The outlet position of the exhaust hole 14 and the inlet position of the grouting hole 13 may be located on the same side of the same web 11, or may be located on two different sides of the same web 11, and the aperture of the exhaust hole 14 may be any value between 3cm and 15cm, such as 5cm, 10cm, and 15cm, so that the exhaust of the gas or concrete in the notch 112 may be ensured, the overall strength of the box girder 10 may not be reduced too much, and a stable support may be provided for the construction of the following bridge.
And S104, performing prestress tensioning on the steel bundle 12, anchoring the steel bundle on the anchorage device 15, and grouting the prestress pore passage 111 by adopting vacuum-assisted grouting.
Specifically, as shown in fig. 6, the steel bundle 12 may be prestressed and tensioned by using a tensioning device such as a jack to gradually increase the tensioning force, the actual elongation of the steel bundle 12 is checked immediately after tensioning is completed, if the deviation from the theoretical elongation value is within the predetermined range and there is no slipping phenomenon, the load should be maintained for 2 minutes after the steel bundle is determined to be qualified, so as to further enhance the anchoring effect, the steel bundle 12 is anchored on the anchorage device 15, and the box girder is filled with slurry by using a vacuum slurry pressing method to the prestressed duct 111, so as to increase the overall strength of the box girder and protect the steel bundle from corrosion.
And S105, pouring concrete from the outer side surface of the web plate 11 to the grouting hole 13, and sealing and protecting the anchorage device 15 in the notch 112.
Wherein, within 48 hours after the steel bundle 12 is prestressed, tensioned and anchored, the prestressed duct 111 needs to be vacuum-assisted grouting to reduce the corrosion of the steel bundle 12.
Specifically, as shown in fig. 7 and 9, before concrete pouring, to ensure that the inside of the grouting hole 13 and the inside of the notch 112 are clean and dry, the grouting hole 13 and the notch 112 may be flushed with high-pressure water, the inside of the hole is dried by high-pressure air without oil, then concrete is poured from the entrance of the grouting hole 13 on the outer side of the web 11, and after the concrete is solidified, the anchorage 15 inside the notch 112 is sealed and protected.
According to the construction method, the web plate is arranged, the prestressed duct and the notch communicated with the prestressed duct are formed in the web plate, and the steel strand penetrating through the prestressed duct is arranged in the web plate; grouting holes and exhaust holes which are arranged at intervals are formed in the web plate from the outer side surface of the web plate; pre-stress tensioning is carried out on the steel beam; and pouring concrete into the grouting holes from the outer side surface of the web plate to seal and protect the anchorage devices in the notches. Compared with the traditional mode of pouring concrete from bottom to top, the construction method provided by the invention has the advantages that the construction is simple, the concrete in the groove is poured more compactly, and the construction quality is guaranteed.
Optionally, in some embodiments, as shown in fig. 2, the construction method further includes:
an anchorage device 15 fixedly connected with the web 11 is arranged at one end of the notch 112 of the web 11, part of the anchorage device 15 extends into the prestressed duct 111, an anchorage device through hole 151 is formed in the anchorage device 15, the anchorage device through hole 151 is communicated with the prestressed duct 111, and the steel strand 12 passes through the anchorage device through hole 151 and extends out of the web 11.
Specifically, as shown in fig. 6 and 9, the anchorage device 15 is disposed at one end of the web 11 where the slot 112 is located, that is, one end of the prestressed duct 111 close to the slot 112, while a part of the anchorage device 15 is located in the prestressed duct 111, a part of the anchorage device 15 located in the prestressed duct 111 is fixedly connected with the web 11 through concrete, a part of the anchorage device 15 located outside the prestressed duct 111 is provided with anchorage device through holes 151, the number of the anchorage device through holes 151 may be multiple, so that multiple steel bundles 12 pass therethrough, while the steel bundles 12 extend to the outside of the web 11 through the anchorage device through holes 151, and the length of the steel bundle 12 located outside the web 11 should generally be not less than 30cm, so as to pre-stress the steel bundle 12, which may be adjusted according to actual conditions. By arranging the anchorage device 15 on the web plate 11, the anchorage device 15 further fastens the steel bundle 12 passing through the anchorage device, and the overall strength of the box girder is improved.
Optionally, in some embodiments, as shown in fig. 3, based on fig. 1, step S103 in fig. 1 further includes:
step S103A, the outer side surface includes a plurality of side surfaces, and the side surface of the web 11 where the inlet of the grouting hole 13 is located is provided with the exhaust hole 14, so that the outlet of the exhaust hole 14 and the inlet of the grouting hole 13 are located on the same side surface.
Specifically, as shown in fig. 6 and 9, the outer side surface of the web 11 at least includes two side surfaces, namely a left side surface and a right side surface, and the outlet provided with the exhaust hole 14 and the inlet provided with the grouting hole 13 are on the same side surface of the web 11, that is, when the inlet provided with the grouting hole 13 is provided on the left side surface of the web 11, the outlet of the exhaust hole 14 is also arranged on the left side surface of the web 11 at an interval. The inlet of the grout hole 13 and the outlet of the air discharge hole 14 are provided on the same side of the web 11, and they can be observed simultaneously when concrete is poured, so that the progress of pouring concrete can be grasped.
Optionally, in some embodiments, based on fig. 1, step S103 in fig. 1 further includes:
the exhaust hole 14 is opened above the grout hole 13.
Specifically, as shown in fig. 6 and 9, the exhaust holes 14 are located above the grouting holes 13, that is, in the height direction of the web 11, the exhaust holes 14 are integrally higher than the grouting holes 13 and spaced at a certain distance, so that when concrete is poured in the anchor sealing process, it is ensured that the concrete can be tightly filled in the notches 112, and no hole defect is generated.
Optionally, in some embodiments, as shown in fig. 4, based on fig. 1, step S105 in fig. 1 further includes:
step S105A, before the slot 112 is closed, removing the part of the steel bundle 12 extending out of the web 11 after the pre-stress tensioning.
Specifically, as shown in fig. 9, before the notch 112 is sealed by using concrete and after the strength of the concrete reaches a certain requirement, a grinding wheel saw or a toothless saw may be used to cut the portion of the steel beam 12 extending out of the web 11, so as to ensure the surface tidiness of the web 11 and improve the ornamental performance of the box girder 10.
Optionally, in some embodiments, as shown in fig. 5, based on fig. 1, step S105 in fig. 1 further includes:
step S105B, pouring concrete from the grouting hole 13 by adopting a concrete pumping mode, wherein the pumping pressure grade of the concrete to be pumped is low pressure.
Specifically, as shown in fig. 6, a grouting nozzle and a pressure stabilizing valve may be installed at an inlet of the grouting hole 13, and then a piston-type grouting pump or a screw-type grouting pump is connected to pour concrete into the grouting hole 13, where the pressure level of the pumping pressure is low. Compared with the pouring mode of using a spade and a tamping bar, the pouring time can be effectively shortened by adopting the mode of pumping concrete, and the anchor sealing construction efficiency is improved.
Meanwhile, as shown in fig. 6, an embodiment of the present invention further provides an auxiliary anchor sealing structure, where the auxiliary anchor sealing structure includes: a web 11, a steel bundle 12 and an anchor 15. Wherein the steel bundle 12 is arranged in the web plate 11 and passes through the anchorage device 15, and a grouting hole 13 and an exhaust hole 14 are arranged on the web plate 11.
The web 11 is internally provided with a prestressed duct 111, the prestressed duct 111 penetrates through the web 11 along the length direction of the web 11, and one end of the web 11 in the length direction is provided with a notch 112 communicated with the prestressed duct 111.
Specifically, as shown in fig. 6 and 9, the box girder 10 is a cast-in-place prestressed concrete box girder, and the box girder 10 includes a web 11 and a bottom plate substantially perpendicular to the web 11, wherein the web 11 may be a middle web or a side web of the box girder 10. The prestressed duct 111 is provided in the web 11, and along the length direction of the web 11, the prestressed duct 111 extends from one end surface of the web 11 to the other end surface of the web 11, and the extending direction thereof may be parallel to a plane intersecting the web 11 and the bottom plate, or may form a certain included angle with the plane intersecting the web 11 and the bottom plate, and further, a plurality of prestressed ducts 111 may be provided in the web 11 at the same time. The notch 112 is opened at one end of the web 11 in the length direction and is communicated with the prestressed duct 111, the cross section of the notch 112 may be round, rectangular or trapezoidal, and the depth of the notch 112 may be adjusted according to the actual engineering requirements. By arranging the prestressed duct 111 and the notch 112 communicated with the prestressed duct in the web 11, prestress is applied to the steel bundle 12 at the notch 112 in the subsequent construction process conveniently, and convenience of construction conditions is improved.
The anchorage device 15 is arranged at one end of the web 11 where the notch 112 is located and is fixedly connected with the web 11, the anchorage device 15 partially extends into the prestressed duct 111, the anchorage device 15 is provided with an anchorage device through hole 151, and the anchorage device through hole 151 is communicated with the prestressed duct 111.
Specifically, as shown in fig. 6 and 9, the anchorage device 15 is disposed at one end of the web 11 where the slot 112 is located, that is, one end of the prestressed duct 111 close to the slot 112, while a part of the anchorage device 15 is located in the prestressed duct 111, a part of the anchorage device 15 located in the prestressed duct 111 is fixedly connected with the web 11 through concrete, a part of the anchorage device 15 located outside the prestressed duct 111 is provided with anchorage device through holes 151, the number of the anchorage device through holes 151 may be multiple, so that multiple steel bundles 12 pass therethrough, while the steel bundles 12 extend to the outside of the web 11 through the anchorage device through holes 151, and the length of the steel bundle 12 located outside the web 11 should generally be not less than 30cm, so as to pre-stress the steel bundle 12, which may be adjusted according to actual conditions. By arranging the anchorage device on the web plate, the anchorage device further fastens the steel bundle penetrating through the anchorage device, and the overall strength of the box girder is improved.
The steel strand 12 penetrates through the prestressed duct 111, one end of the steel strand 12 is fixed to an end of the web 11 opposite to the notch 112, and the other end of the steel strand 12 passes through the anchor through hole 151 of the anchor 15 and extends out of the web 11.
Specifically, as shown in fig. 6 and 9, the steel bundle 12 penetrates through the prestressed duct 111, that is, one end of the steel bundle 12 is fixedly embedded at one end of the web 11 opposite to the notch 112, it should be noted that, the end of the web 11 opposite to the notch 112 here refers to one end of the web 11 away from the notch 112 in the extending direction of the prestressed duct 111, and the other end of the steel bundle 12 extends to the outside of the web 11 through the notch 112, where the steel bundle 12 may be a steel bundle woven by parallel steel wires, and the specific specification thereof may be determined according to the actual engineering requirements, for example, a steel bundle woven by 20 steel wires with a diameter of 5mm, and the like.
The grouting holes 13 and the exhaust holes 14 are arranged in the web 11 at intervals from the outer side surface of the web 11 to the inside of the web 11, and are communicated with the notches 112.
Specifically, as shown in fig. 8 and 9, the opening position of the inlet of the grouting hole 13 is located on the outer side surface of the web 11, and in the height direction of the web 11, the opening position is higher than the notch 112, and the opening position of the outlet of the grouting hole 13 is located on the hole wall surface of the web 11, so that the grouting hole 13 is communicated with the notch 112, thereby realizing the pouring of concrete from top to bottom. The aperture of the grouting hole 13 may be any value between 15cm and 35cm, such as 15cm, 25cm, and 35 cm.
The outlet of the exhaust hole 14 is arranged on the outer side surface of the web 11, the outlet of the exhaust hole can be arranged on the left side, the right side or the upper side of the inlet of the grouting hole 13 at a certain distance, the inlet of the exhaust hole 14 is arranged on the hole wall surface of the web 11, the outlet of the exhaust hole 14 and the inlet of the grouting hole 13 can be arranged on the same side surface of the same web 11 or on two different side surfaces of the same web 11, and the aperture of the exhaust hole 14 can be any numerical value between 3cm and 15cm, such as 5cm, 10cm and 15 cm.
By arranging the grouting holes 13 and the exhaust holes 14 on the web plate 11 at intervals, concrete can be poured from the grouting holes 13 when the anchor is sealed, the condition that the poured concrete is judged by observing the outlets of the exhaust holes 14, and the anchorage device 15 after prestressed tension anchoring is protected in a sealing mode.
Alternatively, as shown in fig. 9, the outlet of the exhaust hole 14 is located above the inlet of the grouting hole 13; the outer side surface comprises a plurality of side surfaces, and the inlet of the grouting hole 13 and the outlet of the exhaust hole 14 are positioned on the same side surface of the web plate 11. Specifically, the outlet of the exhaust hole 14 is above the inlet of the grouting hole 13, which means that the exhaust hole 14 is located on the upper side of the grouting hole 13 in the height direction of the web 11 and is spaced at a certain distance. The outer side surface of the web plate 11 at least comprises a left side surface and a right side surface, and the outlet provided with the exhaust hole 14 and the inlet of the grouting hole 13 are arranged on the same side surface of the web plate 11, namely when the inlet of the grouting hole 13 is arranged on the left side surface of the web plate 11, the outlets of the exhaust holes 14 are also arranged on the left side surface of the web plate 11 at intervals. The inlet of the grout hole 13 is disposed below the outlet of the air discharge hole 14 and on the same side of the web, and they can be observed simultaneously when concrete is poured, so that the progress of pouring concrete can be grasped.
The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents and improvements made within the spirit and principle of the present invention are intended to be included within the scope of the present invention.
Claims (10)
1. A construction method for sealing an anchor is characterized by comprising the following steps:
the method comprises the following steps that a prestressed duct is formed in a web plate, the prestressed duct penetrates through the web plate along the length direction of the web plate, one end of the web plate in the length direction is provided with a notch communicated with the prestressed duct, a steel strand penetrates through the prestressed duct, one end of the steel strand is fixed with one end of the web plate, opposite to the notch, and the other end of the steel strand penetrates through the notch and extends out of the web plate;
arranging a grouting hole, arranging the grouting hole in the web plate from the outer side surface of the web plate, and communicating the grouting hole with the notch;
arranging an exhaust hole, arranging the exhaust hole in the web from the outer side surface of the web, wherein the exhaust hole is communicated with the notch, and the exhaust hole and the grouting hole are arranged at intervals;
pre-stressed tensioning is carried out on the steel beam, the steel beam is anchored on the anchorage device, and vacuum-assisted grouting is adopted to carry out grouting on the pre-stressed duct;
and pouring concrete, pouring concrete from the outer side surface of the web plate to the grouting hole, and sealing the anchorage device in the notch.
2. The construction method according to claim 1, further comprising:
the one end at the notch of the web plate is provided with an anchorage device fixedly connected with the web plate, the anchorage device partially extends into the prestressed pore passage, the anchorage device is provided with an anchorage device through hole, the anchorage device through hole is communicated with the prestressed pore passage, and the steel strand penetrates through the anchorage device through hole and extends out of the web plate.
3. The construction method according to claim 1, wherein the forming of the exhaust hole further comprises:
the outer side face comprises a plurality of side faces, the side face of the web plate where the inlet of the grouting hole is located is provided with the exhaust hole, and the outlet of the exhaust hole and the inlet of the grouting hole are located on the same side face.
4. The construction method according to claim 1, wherein the forming of the exhaust hole further comprises: the exhaust hole is formed above the grouting hole.
5. The construction method according to claim 1, further comprising:
and removing the part of the steel bundle extending out of the web after the prestressed tensioning before the notch is closed.
6. The construction method according to claim 1, further comprising: and pouring concrete from the grouting holes in a concrete pumping mode.
7. The construction method according to claim 6, further comprising:
the pumping pressure grade of the pumping concrete is low pressure.
8. An auxiliary anchor sealing structure, comprising:
the web plate is internally provided with a prestressed duct, the prestressed duct penetrates through the web plate along the length direction of the web plate, and one end of the web plate in the length direction is provided with a notch communicated with the prestressed duct;
the anchorage device is arranged at one end where the notch of the web plate is located and is fixedly connected with the web plate, the anchorage device partially extends into the prestressed pore channel, an anchorage device through hole is formed in the anchorage device, and the anchorage device through hole is communicated with the prestressed pore channel;
the steel strand penetrates through the prestressed duct, one end of the steel strand is fixed with one end, opposite to the notch, of the web, and the other end of the steel strand penetrates through the anchor through hole of the anchor and extends out of the web;
the outer side surface of the web plate is provided with grouting holes and exhaust holes which are arranged at intervals in the web plate, and the grouting holes and the exhaust holes are communicated with the notch.
9. An auxiliary seal anchor construction as claimed in claim 8 wherein the outlet of the vent hole is located above the inlet of the grout hole.
10. An auxiliary seal anchor configuration as claimed in claim 8 or 9, wherein said outer side includes a plurality of sides, the inlet of said grout hole being located on the same said side of said web as the outlet of said vent hole.
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