CN114592423B - Wet joint connection construction method for prefabricated pier column and bearing platform - Google Patents
Wet joint connection construction method for prefabricated pier column and bearing platform Download PDFInfo
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- CN114592423B CN114592423B CN202210348305.6A CN202210348305A CN114592423B CN 114592423 B CN114592423 B CN 114592423B CN 202210348305 A CN202210348305 A CN 202210348305A CN 114592423 B CN114592423 B CN 114592423B
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- 238000010276 construction Methods 0.000 title claims abstract description 36
- 239000002002 slurry Substances 0.000 claims abstract description 22
- 238000000034 method Methods 0.000 claims abstract description 17
- 229910000831 Steel Inorganic materials 0.000 claims description 20
- 239000010959 steel Substances 0.000 claims description 20
- 239000011374 ultra-high-performance concrete Substances 0.000 claims description 8
- 238000003466 welding Methods 0.000 claims description 6
- 238000005266 casting Methods 0.000 claims description 5
- 239000000463 material Substances 0.000 claims description 5
- 238000013461 design Methods 0.000 abstract description 2
- 239000011150 reinforced concrete Substances 0.000 description 6
- 238000009434 installation Methods 0.000 description 5
- 238000004873 anchoring Methods 0.000 description 4
- 239000002184 metal Substances 0.000 description 4
- 229910001294 Reinforcing steel Inorganic materials 0.000 description 3
- 239000004567 concrete Substances 0.000 description 2
- 238000009415 formwork Methods 0.000 description 2
- 238000011065 in-situ storage Methods 0.000 description 2
- 238000010008 shearing Methods 0.000 description 2
- 125000006850 spacer group Chemical group 0.000 description 2
- 238000004458 analytical method Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000004364 calculation method Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000003780 insertion Methods 0.000 description 1
- 230000037431 insertion Effects 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 230000013011 mating Effects 0.000 description 1
- 238000003908 quality control method Methods 0.000 description 1
- 239000002689 soil Substances 0.000 description 1
- 239000004575 stone Substances 0.000 description 1
Classifications
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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
- E01D19/00—Structural or constructional details of bridges
- E01D19/02—Piers; Abutments ; Protecting same against drifting ice
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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
- E01D19/00—Structural or constructional details of bridges
- E01D19/06—Arrangement, construction or bridging of expansion joints
- E01D19/067—Flat continuous joints cast in situ
-
- 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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- Engineering & Computer Science (AREA)
- Architecture (AREA)
- Civil Engineering (AREA)
- Structural Engineering (AREA)
- Bridges Or Land Bridges (AREA)
Abstract
The invention discloses a wet joint connection structure of a prefabricated pier column and a bearing platform and a construction method, and aims to reduce the precision requirement of the wet joint connection of the prefabricated pier column and the bearing platform, ensure the connection strength of the wet joint and simplify the construction process. The technical scheme adopted by the invention is as follows: the wet joint connection structure of the prefabricated pier stud and the bearing platform comprises the bearing platform and the prefabricated pier stud, wherein a sinking platform is arranged in the middle of the top surface of the bearing platform, and anchor bolt holes are reserved at the bottom of the sinking platform; and embedding an anchor bolt at the bottom of the prefabricated pier stud, placing the bottom of the prefabricated pier stud in a sinking platform, inserting the anchor bolt in an anchor bolt hole, and pouring slurry in a gap between the sinking platform and the anchor bolt hole to form a post-pouring body. The construction method for connecting the wet joints of the prefabricated pier column and the bearing platform comprises the steps of firstly supporting a mould of the bearing platform, pouring and maintaining, then hoisting the prefabricated pier column into a sinking platform of the bearing platform, inserting anchor bolts into anchor bolt holes, adjusting the centrality and the verticality, and finally pouring gaps between the sinking platform and the anchor bolt holes by adopting slurry. The invention is used for bridge design and construction.
Description
Technical Field
The invention relates to the technical field of bridge engineering, in particular to a wet joint connection structure of a prefabricated pier stud and a bearing platform and a construction method of the wet joint connection structure.
Background
In recent years, bridge assembly construction has become a major trend in green construction of bridges. At present, the connection mode of the prefabricated pier column and the bearing platform mainly comprises grouting sleeve connection, prestress connection, socket connection and wet joint connection. The grouting sleeve connection is mainly characterized by short field construction period and small workload, but has higher requirements on construction precision, and the compactness of sleeve grouting is difficult to ensure, thus being unfavorable for construction quality control. The prestress connection is mature in technology, design and calculation analysis and widely applied, but is complex in process, long in period and high in manufacturing cost. The socket connection has the advantages of simple working procedure and small workload, but has the defects of insufficient shearing capacity of the structural form and still needs to be researched on the overall stability. The mechanical property of wet joint connection is similar to that of cast-in-place concrete, the principle is simple, the application is wider, but the traditional wet joint connection needs to be connected with reinforcing steel bars and a formwork is erected, the construction period is long, and the workload is large.
The patent with publication number of CN 113235401A discloses a prefabricated pier column and bearing platform connection structure with an adjustable wet joint mode and a construction method, a post-cast section is arranged below the ground and at the root of the pier column, a temporary support system and a verticality adjusting system are additionally arranged, a prefabricated pier column main rib is welded with a bearing platform pre-buried connection reinforcing steel bar, and a post-cast pier head is poured by fine stone concrete or UHPC and is located below the ground. Compared with the traditional wet joint connection, the scheme has the advantages that the working procedure is simplified, the installation accuracy of the prefabricated pier stud can be better controlled, the temporary support is needed to be additionally arranged, the post-cast pier stud is exposed out of the top surface of the bearing platform, the vertical mould is additionally arranged, and before the temporary support is removed, the post-cast pier stud is constructed, the weight of the prefabricated pier stud is born only by the pier stud reinforcing steel bars, and the overall strength, the rigidity and the stability are required to be practically checked.
Disclosure of Invention
The invention firstly provides a wet joint connection structure of a prefabricated pier column and a bearing platform, and aims to reduce the precision requirement of the wet joint connection of the prefabricated pier column and the bearing platform, ensure the connection strength of the wet joint and simplify the construction process.
The technical scheme adopted by the invention for achieving the purpose is as follows: the wet joint connection structure of the prefabricated pier stud and the bearing platform comprises the bearing platform and the prefabricated pier stud, wherein the bearing platform is cast-in-situ reinforced concrete, a sinking platform is arranged in the middle of the top surface of the bearing platform, the size of the sinking platform on a horizontal section is larger than that of the bottom of the prefabricated pier stud on the horizontal section, and at least three anchor bolt holes which are vertically arranged are reserved at the bottom of the sinking platform; the bottom of prefabricated pier stud is embedded with anchor bolts, the anchor bolts are vertically arranged, the number of the anchor bolts is equal to that of the anchor bolt holes and the positions of the anchor bolts correspond to that of the anchor bolt holes, the bottom of the prefabricated pier stud is placed in the sinking platform, the anchor bolts are inserted into the anchor bolt holes, and the gaps between the sinking platform and the anchor bolt holes are post-cast bodies formed by casting slurry.
Further is: the bottom of the sinking platform is provided with a base plate and/or the bottom of the prefabricated pier column is provided with a bottom plate, wherein the base plate is provided with a through hole or a notch at a position corresponding to the anchor bolt hole, and the shape of the bottom plate is consistent with that of the bottom of the prefabricated pier column.
Further, it is: the bottom plate and each anchor bolt are of an integral structure.
Specific: the bottom plate and the backing plate are both steel plates, and at least one welding point is arranged at the edge of the bottom plate and the backing plate. For example, the bottom plate and the backing plate are Q355 steel plates with a thickness of 30mm.
Specific: the distance between the edge of the sinking platform and the outer wall of the prefabricated pier stud is 100-150 mm.
Further is: and a grading gasket for leveling the prefabricated pier column is further arranged between the top of the bearing platform and the bottom of the prefabricated pier column.
Specific: the sinking platform is in a straight prism shape or a cylindrical shape, and anchor bolt holes are uniformly distributed in the sinking platform. For example, the sinking platform is in a cuboid shape, four corners of the sinking platform are respectively provided with an anchor bolt hole, and the depth of the sinking platform is 150mm.
Specific: the slurry for forming the post-cast body is high-strength shrinkage-free grouting material or UHPC.
Specific: the anchor bolt is of diameterIs a round steel bolt.
The invention also provides a construction method for connecting the wet joints of the prefabricated pier column and the bearing platform, and the method is also used for reducing the precision requirement of the wet joint connection of the prefabricated pier column and the bearing platform, ensuring the connection strength of the wet joint and simplifying the construction process. The construction method for connecting the wet joints of the prefabricated pier column and the bearing platform comprises the following steps:
s1, supporting a mould of a bearing platform, pouring and maintaining; the middle part of the top surface of the bearing platform is provided with a sinking platform, the size of the sinking platform on the horizontal section is larger than that of the bottom of the prefabricated pier column on the horizontal section, and at least three anchor bolt holes which are vertically arranged are reserved at the bottom of the sinking platform.
Further is: and a backing plate is arranged at the bottom of the sinking platform by adopting a slurry-sitting method, and through holes or gaps are formed in the positions, corresponding to the anchor bolt holes, of the backing plate. For example, the backing plate is a Q355 steel plate with a thickness of 30mm.
Specific: the sinking platform is in a straight prism shape or a cylindrical shape, and anchor bolt holes are uniformly distributed in the sinking platform. For example, the sinking platform is in a cuboid shape, four corners of the sinking platform are respectively provided with an anchor bolt hole, and the depth of the sinking platform is 150mm.
S2, hoisting the prefabricated pier column into a sinking platform of a bearing platform, inserting anchor bolts into corresponding anchor bolt holes, and adjusting the centrality and verticality of the prefabricated pier column to meet the requirements in the hoisting process; wherein, the bottom pre-buried crab-bolt of prefabricated pier stud, the quantity of crab-bolt and anchor bolt hole equals and the position corresponds.
Specific: after the prefabricated pier column is placed in the center of the sinking platform, the distance between the edge of the sinking platform and the outer wall of the prefabricated pier column is 100-150 mm.
Further is: the bottom of prefabricated pier stud sets up the bottom plate, and the shape of bottom plate is unanimous with the shape of prefabricated pier stud bottom. For example, the bottom plate is a Q355 steel plate with a thickness of 30mm.
Further, it is: the bottom plate and each anchor bolt are of an integral structure. For example, the anchor is of diameterThe round steel bolts of the (4) are characterized in that the bottom plate and the anchor bolts are made of steel, and the bottom plate and the anchor bolts are welded and fixed.
Further is: in the step S2, the perpendicularity of the prefabricated pier stud is adjusted by adopting the grading gasket.
Further is: and (2) after the step (S2), welding and fixing the bottom plate at the bottom of the prefabricated pier column and the backing plate at the top of the sinking platform before the step (S3).
S3, pouring the gap between the sinking platform and the anchor bolt hole by adopting slurry, pouring the gap to the elevation of the top surface of the bearing platform, and pouring the slurry to form a post-pouring body.
Specific: the slurry is high-strength shrinkage-free grouting material or UHPC.
The beneficial effects of the invention are as follows: the wet joint connection structure of the prefabricated pier column and the bearing platform and the construction method have the advantages of simple installation, low connection precision requirement, large construction tolerance error, no need of formwork supporting on a construction site, high construction speed, simple structure, low cost and strong joint shearing resistance, and the construction position is hidden without affecting the whole appearance, so that the purposes of short construction period, low cost and easy guarantee of safety quality are achieved.
Drawings
FIG. 1 is a schematic plan view of a deck of the wet joint connection of prefabricated piers and deck of the present invention.
FIG. 2 is a graph of the abutment of FIG. 1 in a mating relationship with a preformed abutment at section A-A.
Reference numerals: bearing platform 1, sinking platform 11, anchor bolt hole 12, backing plate 13, prefabricated pier stud 2, crab-bolt 21, bottom plate 22, post-cast body 3.
Detailed Description
The invention is further described below with reference to the accompanying drawings.
Referring to fig. 1 and 2, the wet joint connection structure of the prefabricated pier column and the bearing platform comprises a bearing platform 1 and a prefabricated pier column 2, wherein the bearing platform 1 is of a reinforced concrete structure and is obtained by casting in situ. The top surface of the bearing platform 1 is provided with a sinking platform 11, the sinking platform 11 is used for placing the prefabricated pier column 2 and is connected through a wet joint, so that the size of the sinking platform 11 on the horizontal section is larger than that of the bottom of the prefabricated pier column 2 on the horizontal section, and the bottom of the prefabricated pier column 2 can be placed into the sinking platform 11. The sinking platform 11 is positioned in the middle of the top surface of the bearing platform 1, so that the stress balance is ensured, and the eccentric phenomenon is avoided. The sinking table 11 has a rectangular prism or a cylindrical shape, for example, referring to fig. 1, and the sinking table 11 has a rectangular parallelepiped shape. At least three anchor holes 12 are reserved at the bottom of the sinking platform 11, and the anchor holes 12 are used for inserting anchor bolts 21 at the bottom of the prefabricated pier stud 2. The anchor eye 12 is preferably cylindrical in shape, but may also be in the shape of a right prism. The anchor holes 12 should be distributed as evenly as possible in the countersunk platform 11 to ensure a uniform stress between the platform 1 and the prefabricated pier 2. For example, referring to fig. 1, four corners of the sinking table 11 are respectively provided with an anchor hole 12.
The prefabricated pier stud 2 is manufactured in a factory, and is also a reinforced concrete structure. The bottom of the prefabricated pier stud 2 is embedded with anchor bolts 21, the anchor bolts 21 are used for being inserted into anchor bolt holes 12 of the bearing platform 1, and the anchor bolts 21 are equal in number and corresponding in position to the anchor bolt holes 12. The anchor bolts 21 are vertically arranged, namely, after the prefabricated pier stud 2 is installed, the axes of the anchor bolts 21 are vertical. The upper section of the anchor bolt 21 is embedded in the prefabricated pier stud 2, and the embedding depth of the upper section of the anchor bolt 21 meets the anchoring length requirement specified by the specification; the lower section of the anchor bolt 21 is inserted into the anchor bolt hole 12 to play a role in anchoring, and the depth of the lower section of the anchor bolt 21 embedded into the anchor bolt hole 12 also meets the requirement of the anchoring length specified by the specification. The anchors 21 being steel, e.g. of diameterIs a round steel bolt. The bottom of the prefabricated pier stud 2 is placed in a sinking platform 11, an anchor bolt 21 is inserted into an anchor bolt hole 12, the bottom of the sinking platform 11 directly bears the weight of the prefabricated pier stud 2, and a gap between the sinking platform 11 and the anchor bolt hole 12 is a post-pouring body 3 formed by pouring slurry. For example, the gap between the sinking platform 11 and the anchor bolt hole 12 is poured by high-strength shrinkage-free grouting material or ultra-high performance concrete UHPC, and the grouting material finally forms the post-cast body 3.
The sinking platform 11 on the top surface of the bearing platform 1 can directly bear the weight of the prefabricated pier column 2, and more preferably, the bottom of the sinking platform 11 is provided with a base plate 13, and the base plate 13 directly bears the weight of the prefabricated pier column 2. The pad 13 can avoid damage to the top of the bearing platform 1 during the installation of the prefabricated pier stud 2. The edge of the backing plate 13 preferably coincides with the edge of the sinking platform 11 to enlarge the bearing area of the backing plate 13 and to fully protect the reinforced concrete in the sinking platform 11. The backing plate 13 is preferably a metal plate and can be arranged at the bottom of the sinking platform 11 by a slurry-sitting method. For example, the backing plate 13 is a Q355 steel plate, and has a thickness of 30mm. The backing plate 13 is provided with through holes or notches at positions corresponding to the anchor holes 12 so as to avoid affecting the insertion of the anchors 21 into the anchor holes 12. For example, referring to fig. 1, four corners of the pad 13 are respectively provided with rectangular notches, and the pad 13 is cross-shaped.
Reinforced concrete at bottom of prefabricated pier column 2The soil can be directly placed on the sinking platform 11, and more preferably, the bottom plate 22 is arranged at the bottom of the prefabricated pier stud 2, the shape of the bottom plate 22 is consistent with that of the bottom of the prefabricated pier stud 2, and the prefabricated pier stud 2 is placed on the sinking platform 11 through the bottom plate 22. The bottom plate 22 prevents damage during installation of the bottom of the prefabricated pier stud 2. The shape of the bottom plate 22 preferably conforms to the shape of the bottom of the prefabricated pier stud 2 so that the bottom plate 22 completely covers the bottom of the prefabricated pier stud 2. The base 22 is preferably a metal plate, for example, the base 22 is a Q355 steel plate, having a thickness of 30mm. The bottom plate 22 is preferably of unitary construction with each anchor bolt 21. For example, the anchor bolts 21 are of diameterThe bottom plate 22 is provided with a through hole, and the anchor bolt 21 penetrates through the through hole and is welded and fixed.
After the prefabricated pier stud 2 is aligned, that is, after the centrality and verticality of the prefabricated pier stud 2 meet the requirements, the bearing platform 1 and the prefabricated pier stud 2 are preferably fixed relatively, and then slurry is poured into the gap between the sinking platform 11 and the anchor bolt hole 12. In the case that the base plate 13 is provided at the bottom of the sinking table 11 and the base plate 22 is provided at the bottom of the prefabricated pier column 2, after the prefabricated pier column 2 is aligned, at least one welding point is provided at the edges of the base plate 22 and the base plate 13, and the base plate 22 and the base plate 13 are welded and fixed. The weld formed between the bottom plate 22 and the backing plate 13 is discontinuous, so that the gap between the bottom plate 22 and the backing plate 13 can be filled with slurry, and the slurry is prevented from entering the gap between the bottom plate 22 and the backing plate 13 by the continuous weld. In order to facilitate the welding operation and avoid the influence of too small gaps on the pouring quality of the slurry, the distance between the edge of the sinking platform 11 and the outer wall of the prefabricated pier column 2 is 100-150 mm. The depth of the counter 11 determines the depth of the wet joint connection, for example the counter 11 is 150mm.
In order to ensure that the perpendicularity of the prefabricated pier stud 2 meets the requirement, a grading gasket for leveling the prefabricated pier stud 2 can be arranged between the top of the bearing platform 1 and the bottom of the prefabricated pier stud 2. The gaps between the bearing platform 1 and the prefabricated pier stud 2 due to the arrangement of the grading gaskets are finally filled with slurry, and a post-cast body 3 is formed. The graded spacer is preferably disposed between the base 22 and the backing 13.
The invention also provides a construction method for connecting the wet joints of the prefabricated pier column and the bearing platform, and the method is also used for reducing the precision requirement of the wet joint connection of the prefabricated pier column 2 and the bearing platform 1, ensuring the connection strength of the wet joint and simplifying the construction process. The final structure obtained by the construction method for connecting the wet joints of the prefabricated pier column and the bearing platform is the wet joint connecting structure of the prefabricated pier column and the bearing platform.
Referring to fig. 1 and 2, the construction method for connecting the wet joint of the prefabricated pier column and the bearing platform comprises the following steps:
s1, supporting the mould of the bearing platform 1, pouring and maintaining.
The middle part of cushion cap 1 top surface sets up heavy platform 11, and the size of heavy platform 11 on horizontal cross section is greater than the size of prefabricated pier stud 2's bottom on horizontal cross section to guarantee that the bottom of prefabricated pier stud 2 can put into heavy platform 11. The sinking table 11 is in a shape of a straight prism or a cylinder. Regarding the size of the sinking table 11, consider the following: after the prefabricated pier column 2 is placed in the center of the sinking platform 11, a certain distance is kept between the edge of the sinking platform 11 and the outer wall of the prefabricated pier column 2, so that pouring construction of the post-pouring body 3 is facilitated, the position of the prefabricated pier column 2 is also facilitated to be adjusted, and for example, the distance between the edge of the sinking platform 11 and the outer wall of the prefabricated pier column 2 is 100-150 mm. The depth of the sinking platform 11 is the difference between the elevation of the top surface of the bearing platform 1 and the elevation of the bottom of the prefabricated pier 2, for example, the depth of the sinking platform 11 is 150mm.
At least three anchor holes 12 are reserved at the bottom of the sinking platform 11, and the anchor holes 12 are used for inserting anchor bolts 21 at the bottom of the prefabricated pier stud 2. The depth of the anchor hole 12 is deep enough that the depth of the embedded anchor hole 12 at the lower section of the anchor bolt 21 meets the anchoring length requirement specified by the specification. The anchor eye 12 may be a straight prism or cylindrical, generally cylindrical. The anchor bolt holes 12 are uniformly distributed in the sinking platform 11, so that the stress between the bearing platform 1 and the prefabricated pier stud 2 is optimized. For example, referring to fig. 1 and 2, the sinking table 11 has a rectangular parallelepiped shape, and four corners of the sinking table 11 are respectively provided with an anchor hole 12.
In order to avoid damage to the top of the platform 1 during installation of the prefabricated pier stud 2, a pad 13 may be installed at the bottom of the sinking platform 11, for example, the pad 13 is installed at the bottom of the sinking platform 11 by using a slurry sitting method. The backing plate 13 is a metal plate, so that the strength requirement is ensured. The top surface of the pad 13 should be as flat as possible to facilitate alignment of the prefabricated pier stud 2. The pad 13 is provided with a through hole or a notch at a position corresponding to the anchor hole 12, and the aperture of the through hole is not smaller than the aperture of the anchor hole 12 to sufficiently expose the anchor hole 12. For example, referring to fig. 1, the backing plate 13 is a Q355 steel plate with a thickness of 30mm, four corners of the backing plate 13 are respectively provided with rectangular notches, the four notches respectively correspond to the four anchor bolt holes 12, and the backing plate 13 is in a cross shape.
S2, hoisting the prefabricated pier stud 2 into the sinking platform 11 of the bearing platform 1, inserting the anchor bolts 21 into the corresponding anchor bolt holes 12, and adjusting the centrality and the verticality of the prefabricated pier stud 2 to meet the requirements in the hoisting process.
The bottom of the prefabricated pier stud 2 is embedded with anchor bolts 21, and the number of the anchor bolts 21 is equal to that of the anchor bolt holes 12 and the positions of the anchor bolts are corresponding to those of the anchor bolt holes 12. The exposed length of the anchor bolt 21 is not greater than the depth of the anchor bolt hole 12. The anchor bolts 21 are preferably steel, e.g. the anchor bolts 21 are of diameterIs a round steel bolt. The reinforced concrete at the bottom of the prefabricated pier column 2 can be directly placed in the sinking table 11, and more preferable scheme is that a bottom plate 22 is arranged at the bottom of the prefabricated pier column 2, the shape of the bottom plate 22 is consistent with that of the bottom of the prefabricated pier column 2, and the whole end face of the bottom of the prefabricated pier column 2 is protected. The base 22 is a metal plate, preferably steel, that ensures the strength requirements. The lower surface of the base plate 22 is as flat as possible to facilitate alignment of the prefabricated pier stud 2. For example, the bottom plate 22 is a Q355 steel plate, and has a thickness of 30mm. The base plate 22 and each anchor bolt 21 are preferably of unitary construction and are secured to the bottom of the prefabricated pier stud 2. For example, the bottom plate 22 and the anchor bolts 21 are made of steel, the bottom plate 22 is provided with through holes, and the anchor bolts 21 penetrate through the through holes and are welded and fixed.
When the centrality and the verticality of the prefabricated pier stud 2 are adjusted, the verticality of the prefabricated pier stud 2 can be adjusted by adopting a grading gasket. The graded spacer is preferably placed between the backing plate 13 and the bottom plate 22. In order to further reduce the difficulty of adjusting the position of the prefabricated pier stud 2, a positioning pile with a big top and a small bottom can be arranged on the bottom surface of the prefabricated pier stud 2 or the bottom surface of the bottom plate 22, the positioning pile is made of steel, and a positioning groove with a big top and a small bottom is arranged on the sinking platform 11 or the bottom plate 22, and the positioning pile and the positioning groove are mutually matched.
After the centrality and verticality of the prefabricated pier stud 2 are adjusted to meet the requirements, the bearing platform 1 and the prefabricated pier stud 2 are preferably fixed relatively, and then step S3 is performed. For example, the bottom plate 22 at the bottom of the prefabricated pier stud 2 and the backing plate 13 at the top of the sinking platform 11 are welded and fixed. Butt weld grooves are respectively arranged at the corresponding positions of the bottom plate 22 and the backing plate 13 in advance, and after the bottom plate 22 and the backing plate 13 are welded, intermittent weld seams are formed.
S3, pouring the gap between the sinking platform 11 and the anchor bolt hole 12 by adopting slurry, pouring the gap to the elevation of the top surface of the bearing platform 1, and pouring the slurry to form a post-pouring body 3.
The sinking platform 11 and the anchor bolt hole 12 are communicated with each other, the wet joint structure is positioned below the top surface of the bearing platform 1, and the forming is concise and attractive. And the slurry pouring does not need to independently support a template, and the high-strength shrinkage-free grouting slurry or the ultra-high-performance concrete UHPC is adopted to pour to the elevation of the top surface of the bearing platform.
Claims (5)
1. The construction method for connecting the wet joints of the prefabricated pier column and the bearing platform is characterized by comprising the following steps:
s1, supporting a mould of a bearing platform (1), pouring and maintaining; the method comprises the steps that a sinking table (11) is arranged in the middle of the top surface of a bearing table (1), the size of the sinking table (11) on a horizontal section is larger than that of the bottom of a prefabricated pier column (2), at least three anchor bolt holes (12) which are vertically arranged are reserved at the bottom of the sinking table (11), a backing plate (13) is arranged at the bottom of the sinking table (11) by adopting a slurry-sitting method, and through holes or gaps are formed in positions of the backing plate (13) corresponding to the anchor bolt holes (12);
s2, hoisting the prefabricated pier column (2) into a sinking table (11) of the bearing platform (1), inserting anchor bolts (21) into corresponding anchor bolt holes (12), and adjusting the centrality and verticality of the prefabricated pier column (2) to meet the requirements in the hoisting process; the bottom of the prefabricated pier column (2) is provided with embedded anchor bolts (21), the number of the anchor bolts (21) is equal to that of anchor bolt holes (12) and the positions of the anchor bolts are corresponding to that of the anchor bolt holes, the bottom of the prefabricated pier column (2) is provided with a bottom plate (22), the shape of the bottom plate (22) is consistent with that of the bottom of the prefabricated pier column (2), the bottom plate (22) and each anchor bolt (21) are of an integral structure, a grading gasket used for leveling the prefabricated pier column (2) is arranged between the top of the bearing platform (1) and the bottom of the prefabricated pier column (2), and the perpendicularity of the prefabricated pier column (2) is adjusted by adopting the grading gasket;
s3, welding and fixing a bottom plate (22) at the bottom of the prefabricated pier column (2) and a backing plate (13) at the top of the sinking platform (11), wherein welding seams formed between the bottom plate (22) and the backing plate (13) are discontinuous, casting is carried out on gaps between the sinking platform (11) and the anchor bolt holes (12) by adopting slurry, casting is carried out on the elevation of the top surface of the bearing platform (1), casting slurry forms a post-cast body (3), and gaps between the bearing platform (1) and the prefabricated pier column (2) due to arrangement of grading gaskets are filled with slurry.
2. The construction method for connecting the wet joint of the prefabricated pier column and the bearing platform according to claim 1, which is characterized by comprising the following steps: in the step S1, the sinking platform (11) is in a shape of a straight prism or a cylinder, and the anchor bolt holes (12) are uniformly distributed in the sinking platform (11).
3. The construction method for connecting the wet joint of the prefabricated pier column and the bearing platform according to claim 1, which is characterized by comprising the following steps: in the step S2, after the prefabricated pier column (2) is placed in the center of the sinking platform (11), the distance between the edge of the sinking platform (11) and the outer wall of the prefabricated pier column (2) is 100-150 mm.
4. The construction method for connecting the wet joint of the prefabricated pier column and the bearing platform according to claim 1, which is characterized by comprising the following steps: in step S3, the slurry is a high-strength shrinkage-free grouting material or UHPC.
5. The construction method for connecting the wet joint of the prefabricated pier column and the bearing platform according to any one of claims 1 to 4, which is characterized in that: the anchor bolt (21) is a round steel bolt with the diameter phi of 80-100 mm, the bottom plate (22) and the anchor bolt (21) are made of steel, and the bottom plate (22) and the anchor bolt (21) are welded and fixed.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210348305.6A CN114592423B (en) | 2022-04-01 | 2022-04-01 | Wet joint connection construction method for prefabricated pier column and bearing platform |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210348305.6A CN114592423B (en) | 2022-04-01 | 2022-04-01 | Wet joint connection construction method for prefabricated pier column and bearing platform |
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| CN114592423A CN114592423A (en) | 2022-06-07 |
| CN114592423B true CN114592423B (en) | 2024-01-30 |
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Citations (16)
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