CN110685215A - Semi-assembled combined pier and construction method thereof - Google Patents
Semi-assembled combined pier and construction method thereof Download PDFInfo
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- CN110685215A CN110685215A CN201910897918.3A CN201910897918A CN110685215A CN 110685215 A CN110685215 A CN 110685215A CN 201910897918 A CN201910897918 A CN 201910897918A CN 110685215 A CN110685215 A CN 110685215A
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- 238000010276 construction Methods 0.000 title claims abstract description 23
- 229910000831 Steel Inorganic materials 0.000 claims abstract description 99
- 239000010959 steel Substances 0.000 claims abstract description 99
- 239000004570 mortar (masonry) Substances 0.000 claims abstract description 43
- 239000011374 ultra-high-performance concrete Substances 0.000 claims abstract description 21
- 229910001294 Reinforcing steel Inorganic materials 0.000 claims description 22
- 239000010410 layer Substances 0.000 claims description 10
- 239000004567 concrete Substances 0.000 claims description 9
- 239000012790 adhesive layer Substances 0.000 claims description 6
- 239000003292 glue Substances 0.000 claims description 6
- 239000011440 grout Substances 0.000 claims description 6
- 239000002131 composite material Substances 0.000 claims description 5
- 239000011248 coating agent Substances 0.000 claims description 4
- 238000000576 coating method Methods 0.000 claims description 4
- 238000000034 method Methods 0.000 claims description 3
- 230000003014 reinforcing effect Effects 0.000 claims description 3
- 230000007797 corrosion Effects 0.000 abstract description 4
- 238000005260 corrosion Methods 0.000 abstract description 4
- 239000011150 reinforced concrete Substances 0.000 description 3
- 230000009286 beneficial effect Effects 0.000 description 2
- 230000006835 compression Effects 0.000 description 2
- 238000007906 compression Methods 0.000 description 2
- 239000000853 adhesive Substances 0.000 description 1
- 230000001070 adhesive effect Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005265 energy consumption Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000011160 research Methods 0.000 description 1
- 230000035939 shock Effects 0.000 description 1
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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
- E01D21/00—Methods or apparatus specially adapted for erecting or assembling bridges
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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
- E01D2101/00—Material constitution of bridges
- E01D2101/20—Concrete, stone or stone-like material
- E01D2101/24—Concrete
- E01D2101/26—Concrete reinforced
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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
- E01D2101/00—Material constitution of bridges
- E01D2101/20—Concrete, stone or stone-like material
- E01D2101/24—Concrete
- E01D2101/26—Concrete reinforced
- E01D2101/268—Composite concrete-metal
Abstract
The invention belongs to the field of bridge engineering, and particularly relates to a semi-fabricated combined pier and a construction method thereof. The contact surfaces between the prefabricated pier segments are connected by adopting ultrahigh-performance mortar, and the corrosion resistance of the prefabricated pier segments is superior to that of mortar adopted by the traditional prefabricated spliced pier joints; the ultra-high performance concrete inside the hollow steel pipe of the pier penetrates through the whole pier structure, so that the combined pier has strong deformation capacity, good ductility and strong self-resetting capacity, and the residual deformation of the pier under the earthquake action can be reduced; the technical scheme has convenient and quick construction and higher construction safety.
Description
Technical Field
The invention belongs to the technical field of bridge engineering, and particularly relates to a semi-fabricated combined pier and a construction method thereof.
Background
With the vigorous development of bridge construction in China, the construction environment of bridges is more and more emphasized by various social circles, especially bridges constructed in cities. Compared with the traditional cast-in-place concrete bridge, the segmental assembled pier has the advantages of short construction period, capability of prefabricating components in a prefabricated yard, less interference from the surrounding outside and the like. The connection mode and the connection quality between the sections of the prefabricated assembled bridge pier directly influence the whole stress performance and the seismic performance of the bridge pier. Therefore, a reliable and simple segment connection mode is the key of the application of the prefabricated assembled pier. The existing prefabricated assembled pier segment connection mode is less, the specific implementation mode is more complicated, and the connection quality is difficult to ensure.
The connection mode between the prefabricated bridge pier sections includes a dry joint and a wet joint, wherein the dry joint generally adopts a flat joint, mortar or structural adhesive is used as a cementing material, the horizontal shear resistance is weak, the energy consumption capability of the prefabricated bridge pier is not as good as that of an integral cast-in-place bridge pier, and the residual deformation is large. The prefabricated pier sections connected by wet joints generally need to be provided with short columns to temporarily support the prefabricated pier columns of the upper sections, and the problems of low work efficiency, inconvenient construction and the like exist. A large number of horizontal pseudo-static test researches show that the traditional assembled pier has large residual deformation under the action of horizontal reciprocating load and can be difficult to repair under the action of large-scale earthquake.
For example, the invention patent with the publication number of CN107675610A discloses a structure and a method for connecting prefabricated spliced pier segments, wherein the problem of weak connection of the prefabricated pier segments is solved by applying ultra-high performance concrete UHPC between the prefabricated pier segments and utilizing the compression resistance and the tensile resistance of the ultra-high performance concrete UHPC. The prefabricated pier segments are connected by adopting the cast-in-place UHPC joint, and although the compression resistance and the tensile resistance of the joints of the prefabricated pier segments are enhanced by adopting the prefabricated spliced pier segments and the construction method, the structure is complex, the construction period is long, the stress and strain distribution of the joints is uneven, and the integral stress and the seismic resistance of the pier are poor.
Disclosure of Invention
The technical problem to be solved by the invention is as follows: the semi-fabricated combined pier and the construction method thereof have the advantages of strong shock resistance, convenience and quickness in construction and higher construction safety.
In order to solve the technical problems, the invention adopts the technical scheme that: a semi-fabricated combined bridge pier comprises a prefabricated bearing platform and a plurality of prefabricated bridge pier segments;
the prefabricated bearing platform is arranged on a foundation, a bearing platform hollow steel pipe is arranged in the center of the top of the prefabricated bearing platform, a plurality of preformed holes are formed in the side wall of the prefabricated hollow steel pipe, and a plurality of bearing platform prefabricated steel bars are uniformly arranged on the top surface of the prefabricated bearing platform around the prefabricated hollow steel pipe;
the prefabricated pier sections are cylindrical and vertically connected to the top surface of a prefabricated bearing platform, pier hollow steel pipes are arranged inside the prefabricated pier sections, lower connecting parts are arranged at the bottom ends of the pier hollow steel pipes, the lowest ends of the lower connecting parts are flush with the bottom surfaces of the prefabricated pier sections, the diameter of the lower connecting parts is larger than that of the pier hollow steel pipes and larger than that of the bearing platform hollow steel pipes, upper connecting parts are arranged at the top ends of the pier hollow steel pipes and extend out of the top surfaces of the prefabricated pier sections, the diameter of the upper connecting parts is larger than that of the bearing platform hollow steel pipes and smaller than that of the lower connecting parts, a plurality of reserved holes are formed in the side walls of the upper connecting parts, a plurality of reinforcing steel bar holes are uniformly formed in the prefabricated pier sections around the pier hollow steel pipes, the reinforcing steel bar holes correspond to prefabricated reinforcing steel bars of the prefabricated bearing platform one to one, and a grouting, a pier reserved steel bar is arranged in each steel bar hole, the lower end of the pier reserved steel bar extends into the grouting sleeve, and the upper end of the pier reserved steel bar extends out of the top surface of the prefabricated pier segment;
prefabricated cushion cap is equipped with the first glutinous layer that glues with the contact surface of prefabricated pier segment, it glues glutinous layer to be equipped with the second between prefabricated pier segment and the prefabricated pier segment, the prefabricated reinforcing bar of prefabricated cushion cap stretches into in the grout sleeve, grout sleeve is filled with the mortar, the hollow steel pipe intussuseption of pier is filled with the concrete.
Wherein, the first sticky layer and the second sticky layer are both ultra-high performance mortar.
And the mortar filled in the grouting sleeve is ultrahigh-performance mortar.
And the concrete filled in the hollow steel pipe of the pier is ultra-high performance concrete.
The grouting sleeve is provided with an upper grouting hole and a lower grouting hole, the upper grouting hole is close to the top of the grouting sleeve, and the lower grouting hole is close to the bottom of the grouting sleeve.
The invention has the beneficial effects that:
(1) the strength and the deformability of the pier hollow steel pipes inside the prefabricated pier segments are stronger than those of a traditional common reinforced concrete structure, so that the combined pier is not subjected to crushing damage of the whole section under the action of large earthquake;
(2) the joints of the prefabricated bearing platforms and the prefabricated pier segments adopt mortise and tenon structures (socket joint type), the joints adopt expanded steel pipes, so that the pipe walls of the internal steel pipes can be conveniently punched, the gaps between the internal steel pipes and the external steel pipes are filled with the ultrahigh-performance mortar, the adhesion between the pipes is enhanced, the sectional area of the high-strength ultrahigh-performance mortar at the joints is larger, and the horizontal shear resistance of the pier joints can be improved;
(3) the contact surfaces between the prefabricated pier segments are connected by adopting ultrahigh-performance mortar, and the corrosion resistance of the prefabricated pier segments is superior to that of mortar adopted by the traditional prefabricated spliced pier joints;
(4) the ultra-high performance concrete inside the hollow steel pipe of the pier penetrates through the whole pier structure, so that the combined pier has strong deformation capacity, good ductility and strong self-resetting capacity, and the residual deformation of the pier under the earthquake action can be reduced;
(5) the technical scheme has convenient and quick construction and higher construction safety.
Drawings
Fig. 1 is a schematic structural view of a semi-fabricated composite pier according to an embodiment of the present invention;
fig. 2 is a schematic structural view of a prefabricated cap of a semi-fabricated composite pier according to an embodiment of the present invention;
fig. 3 is a schematic structural view of a prefabricated pier segment of a semi-fabricated composite pier according to an embodiment of the present invention;
FIG. 4 is a view A-A of FIG. 1;
description of reference numerals:
1. prefabricating a bearing platform; 11. a bearing platform hollow steel pipe; 12. prefabricating steel bars on the bearing platform;
2. prefabricating pier sections; 21. hollow steel pipes for bridge piers; 211. an upper connecting portion; 212. a lower connecting portion; 22. grouting a sleeve; 221. an upper grouting hole; 222. a lower grouting hole; 23. reserving reinforcing steel bars for the bridge pier;
Detailed Description
In order to explain technical contents, achieved objects, and effects of the present invention in detail, the following description is made with reference to the accompanying drawings in combination with the embodiments.
Referring to fig. 1, 2, 3 and 4, the semi-fabricated combined pier of the present invention comprises a prefabricated platform 1 and a plurality of prefabricated pier segments 2;
the prefabricated bearing platform 1 is arranged on a foundation, a bearing platform hollow steel pipe 11 is arranged in the center of the top of the prefabricated bearing platform 1, a plurality of preformed holes are formed in the side wall of the prefabricated hollow steel pipe, and a plurality of bearing platform prefabricated steel bars 12 are uniformly arranged on the top surface of the prefabricated bearing platform 1 around the prefabricated hollow steel pipe;
the prefabricated pier sections 2 are cylindrical and vertically connected to the top surface of a prefabricated bearing platform, pier hollow steel pipes 21 are arranged inside the prefabricated pier sections 2, lower connecting parts 212 are arranged at the bottom ends of the pier hollow steel pipes 21, the lowest ends of the lower connecting parts 212 are flush with the bottom surfaces of the prefabricated pier sections 2, the diameters of the lower connecting parts 212 are larger than the diameters of the pier hollow steel pipes 21 and larger than the diameters of the bearing platform hollow steel pipes 11, upper connecting parts 211 are arranged at the top ends of the pier hollow steel pipes 21 and extend out of the top surfaces of the prefabricated pier sections 2, the diameters of the upper connecting parts 211 are larger than the diameters of the bearing platform hollow steel pipes 11 and smaller than the diameters of the lower connecting parts 212, a plurality of reserved holes are formed in the side walls of the upper connecting parts 211, a plurality of reinforcing steel bar holes are uniformly formed in the prefabricated pier sections 2 around the pier hollow steel pipes 21 and correspond to the prefabricated reinforcing steel bars of the prefabricated, the bottom of each reinforcing steel bar hole is communicated with a grouting sleeve 22, a pier reserved reinforcing steel bar 23 is arranged in each reinforcing steel bar hole, the lower end of the pier reserved reinforcing steel bar 23 extends into the grouting sleeve 22, and the upper end of the pier reserved reinforcing steel bar 23 extends out of the top surface of the prefabricated pier section 2;
prefabricated cushion cap 1 is equipped with the first glutinous layer that glues with the contact surface of prefabricated pier segment 2, it glues glutinous layer to be equipped with the second between prefabricated pier segment 2 and the prefabricated pier segment 2, the prefabricated reinforcing bar of prefabricated cushion cap 1 stretches into in grout sleeve 22, grout sleeve 22 is filled with the mortar, the intussuseption of pier hollow steel pipe 21 is filled with the concrete.
As can be seen from the above description, the beneficial effects of the present invention are:
(1) the strength and the deformability of the pier hollow steel pipes inside the prefabricated pier segments are higher than those of a traditional common reinforced concrete structure, and the combined pier is not prone to crushing damage of the whole section under the action of a large earthquake.
(2) Prefabricated cushion cap and prefabricated pier segment junction to and all adopt tenon fourth of the twelve earthly branches structure (socket joint formula) between the prefabricated pier segment, the steel pipe that enlarges is adopted to joint portion department, punches on the pipe wall of inside steel pipe of being convenient for, lets the clearance between the inside and outside steel pipe of ultrahigh performance mortar filling, strengthens the bonding of pipe and pipe, and the sectional area of the ultrahigh performance mortar of joint department high strength is great, can improve pier joint's level shear capacity.
(3) The contact surfaces between the prefabricated pier segments are connected by adopting ultrahigh-performance mortar, and the corrosion resistance of the prefabricated pier segments is superior to that of mortar adopted by the traditional prefabricated spliced pier joints.
(4) The ultra-high performance concrete inside the hollow steel pipe of the pier runs through the whole pier structure, so that the combined pier has strong deformability, good ductility and strong self-resetting capability, and the residual deformation of the pier under the earthquake action can be reduced.
(5) The technical scheme has convenient and quick construction and higher construction safety.
Furthermore, the first sticky layer and the second sticky layer are both ultrahigh-performance mortar.
Further, the mortar filled in the grouting sleeve 22 is ultra-high performance mortar.
Further, the concrete filled in the hollow pier steel tube 21 is ultra-high performance concrete.
Further, the grouting sleeve 22 is provided with an upper grouting hole 221 and a lower grouting hole 222, the upper grouting hole 221 is positioned near the top of the grouting sleeve 22, and the lower grouting hole 222 is positioned near the bottom of the grouting sleeve 22.
The construction method for splicing the combined pier by the upper half-assembly type combined pier comprises the following steps:
the method comprises the following steps: fixing the prefabricated bearing platform 1, coating ultrahigh-performance mortar on the top surface of the prefabricated bearing platform 1 around the hollow steel pipe 11 of the bearing platform, hoisting a section of prefabricated pier segment 2 to the position above the prefabricated bearing platform 1, inserting the hollow steel pipe 11 of the bearing platform of the prefabricated bearing platform 1 into the lower connecting part 212 of the hollow steel pipe 21 of the pier in the prefabricated pier segment 2, simultaneously extending the prefabricated steel bar 12 of the bearing platform on the prefabricated bearing platform 1 into the grouting sleeve 22, and fixing the prefabricated pier segment 2 on the prefabricated bearing platform 1;
step two: respectively injecting ultra-high performance mortar into the lower grouting holes 222 of the plurality of grouting sleeves 22 until the ultra-high performance mortar overflows the upper grouting holes 221; pouring ultra-high performance concrete into the pier hollow steel pipe 21 of the prefabricated pier segment 2 until the top end of the pier hollow steel pipe 21 is filled with the ultra-high performance concrete;
step three: coating ultrahigh-performance mortar on the top surfaces of the connected prefabricated pier segments 2, hoisting a new prefabricated pier segment 2 to the position above the top surfaces of the connected prefabricated pier segments 2, inserting the upper connecting part 211 on the connected prefabricated pier segment 2 into the lower connecting part 212 of the new prefabricated pier segment 2, and simultaneously extending the top ends of pier reserved steel bars 23 on the connected prefabricated pier segment 2 into the grouting sleeve 22 of the new prefabricated pier segment 2;
step four: respectively injecting ultrahigh-performance mortar into the lower grouting holes 222 of the new section of the prefabricated pier segment 2 until the ultrahigh-performance mortar overflows the upper grouting holes 221 of the new section of the prefabricated pier segment 2; pouring ultra-high performance concrete into the pier hollow steel pipe 21 of the new section of the prefabricated pier segment 2 until the ultra-high performance concrete is filled to the top end of the pier hollow steel pipe 21 of the new section of the prefabricated pier segment 2;
step five: and repeating the third step and the fourth step to complete the assembly of the whole combined pier.
The first embodiment is as follows:
a semi-fabricated combined bridge pier comprises a prefabricated bearing platform 1 and a plurality of prefabricated bridge pier segments 2;
the prefabricated bearing platform 1 is arranged on a foundation, a bearing platform hollow steel pipe 11 is arranged in the center of the top of the prefabricated bearing platform 1, a plurality of preformed holes are formed in the side wall of the prefabricated hollow steel pipe, and a plurality of bearing platform prefabricated steel bars 12 are uniformly arranged on the top surface of the prefabricated bearing platform 1 around the prefabricated hollow steel pipe;
the prefabricated pier sections 2 are cylindrical and vertically connected to the top surface of a prefabricated bearing platform, pier hollow steel pipes 21 are arranged inside the prefabricated pier sections 2, lower connecting parts 212 are arranged at the bottom ends of the pier hollow steel pipes 21, the lowest ends of the lower connecting parts 212 are flush with the bottom surfaces of the prefabricated pier sections 2, the diameters of the lower connecting parts 212 are larger than the diameters of the pier hollow steel pipes 21 and larger than the diameters of the bearing platform hollow steel pipes 11, upper connecting parts 211 are arranged at the top ends of the pier hollow steel pipes 21 and extend out of the top surfaces of the prefabricated pier sections 2, the diameters of the upper connecting parts 211 are larger than the diameters of the bearing platform hollow steel pipes 11 and smaller than the diameters of the lower connecting parts 212, a plurality of reserved holes are formed in the side walls of the upper connecting parts 211, a plurality of reinforcing steel bar holes are uniformly formed in the prefabricated pier sections 2 around the pier hollow steel pipes 21 and correspond to the prefabricated reinforcing steel bars of the prefabricated, the bottom of each reinforcing steel bar hole is communicated with a grouting sleeve 22, a pier reserved reinforcing steel bar 23 is arranged in each reinforcing steel bar hole, the lower end of the pier reserved reinforcing steel bar 23 extends into the grouting sleeve 22, and the upper end of the pier reserved reinforcing steel bar 23 extends out of the top surface of the prefabricated pier section 2;
a first adhesive layer is arranged on the contact surface of the prefabricated bearing platform 1 and the prefabricated pier segment 2, a second adhesive layer is arranged between the prefabricated pier segment 2 and the prefabricated pier segment 2, prefabricated steel bars of the prefabricated bearing platform 1 extend into the grouting sleeve 22, the grouting sleeve 22 is filled with mortar, and concrete is filled in the hollow pier steel tube 21;
the first adhesive layer and the second adhesive layer are both ultrahigh-performance mortar;
the mortar filled in the grouting sleeve 22 is ultrahigh-performance mortar;
the concrete filled in the hollow pier steel pipes 21 is ultra-high performance concrete;
the grouting sleeve 22 is provided with an upper grouting hole 221 and a lower grouting hole 222, the upper grouting hole 221 is positioned near the top of the grouting sleeve 22, and the lower grouting hole 222 is positioned near the bottom of the grouting sleeve 22.
In conclusion, the strength and the deformability of the pier hollow steel pipes in the prefabricated pier segments are stronger than those of the conventional common reinforced concrete structure, so that the combined pier is not subjected to crushing damage of the whole section under the action of large earthquake;
the joints of the prefabricated bearing platforms and the prefabricated pier segments adopt mortise and tenon structures (socket joint type), the joints adopt expanded steel pipes, so that the pipe walls of the internal steel pipes can be conveniently punched, the gaps between the internal steel pipes and the external steel pipes are filled with the ultrahigh-performance mortar, the adhesion between the pipes is enhanced, the sectional area of the high-strength ultrahigh-performance mortar at the joints is larger, and the horizontal shear resistance of the pier joints can be improved;
the contact surfaces between the prefabricated pier segments are connected by adopting ultrahigh-performance mortar, and the corrosion resistance of the prefabricated pier segments is superior to that of mortar adopted by the traditional prefabricated spliced pier joints;
the ultra-high performance concrete inside the hollow steel pipe of the pier penetrates through the whole pier structure, so that the combined pier has strong deformation capacity, good ductility and strong self-resetting capacity, and the residual deformation of the pier under the earthquake action can be reduced;
the technical scheme has convenient and quick construction and higher construction safety.
The above description is only an embodiment of the present invention, and not intended to limit the scope of the present invention, and all equivalent changes made by using the contents of the present specification and the drawings, or applied directly or indirectly to the related technical fields, are included in the scope of the present invention.
Claims (6)
1. A semi-fabricated combined bridge pier is characterized by comprising a prefabricated bearing platform and a plurality of prefabricated bridge pier segments;
the prefabricated bearing platform is arranged on a foundation, a bearing platform hollow steel pipe is arranged in the center of the top of the prefabricated bearing platform, a plurality of preformed holes are formed in the side wall of the prefabricated hollow steel pipe, and a plurality of bearing platform prefabricated steel bars are uniformly arranged on the top surface of the prefabricated bearing platform around the prefabricated hollow steel pipe;
the prefabricated pier sections are cylindrical and vertically connected to the top surface of a prefabricated bearing platform, pier hollow steel pipes are arranged inside the prefabricated pier sections, lower connecting parts are arranged at the bottom ends of the pier hollow steel pipes, the lowest ends of the lower connecting parts are flush with the bottom surfaces of the prefabricated pier sections, the diameter of the lower connecting parts is larger than that of the pier hollow steel pipes and larger than that of the bearing platform hollow steel pipes, upper connecting parts are arranged at the top ends of the pier hollow steel pipes and extend out of the top surfaces of the prefabricated pier sections, the diameter of the upper connecting parts is larger than that of the bearing platform hollow steel pipes and smaller than that of the lower connecting parts, a plurality of reserved holes are formed in the side walls of the upper connecting parts, a plurality of reinforcing steel bar holes are uniformly formed in the prefabricated pier sections around the pier hollow steel pipes, the reinforcing steel bar holes correspond to prefabricated reinforcing steel bars of the prefabricated bearing platform one to one, and a grouting, a pier reserved steel bar is arranged in each steel bar hole, the lower end of the pier reserved steel bar extends into the grouting sleeve, and the upper end of the pier reserved steel bar extends out of the top surface of the prefabricated pier segment;
prefabricated cushion cap is equipped with the first glutinous layer that glues with the contact surface of prefabricated pier segment, it glues glutinous layer to be equipped with the second between prefabricated pier segment and the prefabricated pier segment, the prefabricated reinforcing bar of prefabricated cushion cap stretches into in the grout sleeve, grout sleeve is filled with the mortar, the hollow steel pipe intussuseption of pier is filled with the concrete.
2. The semi-fabricated combined pier according to claim 1, wherein the first adhesive layer and the second adhesive layer are both ultra-high performance mortar.
3. The semi-fabricated composite pier according to claim 1, wherein the mortar filled in the grouting sleeve is ultra-high performance mortar.
4. The semi-fabricated combined pier according to claim 1, wherein the concrete filled in the hollow steel pier tube is ultra-high performance concrete.
5. The semi-fabricated composite pier according to claim 1, wherein the grouting sleeve is provided with an upper grouting hole and a lower grouting hole, the upper grouting hole is positioned close to the top of the grouting sleeve, and the lower grouting hole is positioned close to the bottom of the grouting sleeve.
6. The construction method for assembling the combined pier by using the semi-fabricated combined pier of any one of claims 1 to 5, which is characterized by comprising the following steps of:
the method comprises the following steps: fixing the prefabricated bearing platform, coating ultrahigh-performance mortar on the top surface of the prefabricated bearing platform around the hollow steel pipe of the bearing platform, hoisting a section of prefabricated pier segment above the prefabricated bearing platform, inserting the hollow steel pipe of the bearing platform of the prefabricated bearing platform into a lower connecting part of the hollow steel pipe of the pier in the prefabricated pier segment, simultaneously extending prefabricated reinforcing steel bars of the bearing platform on the prefabricated bearing platform into the grouting sleeve, and fixing the prefabricated pier segment on the prefabricated bearing platform;
step two: injecting ultrahigh-performance mortar into the lower grouting hole of the grouting sleeve until the ultrahigh-performance mortar overflows the upper grouting hole; pouring ultra-high performance concrete into the pier hollow steel pipes of the prefabricated pier sections until the top ends of the pier hollow steel pipes are filled with the ultra-high performance concrete;
step three: coating ultrahigh-performance mortar on the top surfaces of the connected prefabricated pier segments, hoisting a new prefabricated pier segment to the position above the top surfaces of the connected prefabricated pier segments, inserting an upper connecting part on the connected prefabricated pier segments into a lower connecting part of the new prefabricated pier segments, and simultaneously extending the top ends of pier reserved steel bars on the connected prefabricated pier segments into a grouting sleeve of the new prefabricated pier segments;
step four: injecting ultrahigh-performance mortar into the lower grouting hole of the new section of the prefabricated pier segment until the ultrahigh-performance mortar overflows the upper grouting hole of the new section of the prefabricated pier segment; pouring ultra-high performance concrete into the pier hollow steel pipe of the new section of the prefabricated pier segment until the ultra-high performance concrete is filled to the top end of the pier hollow steel pipe of the new section of the prefabricated pier segment;
step five: and repeating the third step and the fourth step to complete the assembly of the whole combined pier.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN201910897918.3A CN110685215A (en) | 2019-09-23 | 2019-09-23 | Semi-assembled combined pier and construction method thereof |
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| CN201910897918.3A CN110685215A (en) | 2019-09-23 | 2019-09-23 | Semi-assembled combined pier and construction method thereof |
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| CN110685215A true CN110685215A (en) | 2020-01-14 |
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| CN113668369A (en) * | 2021-09-13 | 2021-11-19 | 江南大学 | Socket type connection structure of prefabricated segment reinforced concrete pier and manufacturing method |
| CN113863126A (en) * | 2021-10-18 | 2021-12-31 | 杭州交通工程监理咨询有限公司 | Construction method of thin-wall hollow pier |
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|---|---|---|---|---|
| CN113668369A (en) * | 2021-09-13 | 2021-11-19 | 江南大学 | Socket type connection structure of prefabricated segment reinforced concrete pier and manufacturing method |
| CN113863126A (en) * | 2021-10-18 | 2021-12-31 | 杭州交通工程监理咨询有限公司 | Construction method of thin-wall hollow pier |
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