CN112853946A - Grouting sleeve, grouting sleeve connected assembled pier and construction method thereof - Google Patents
Grouting sleeve, grouting sleeve connected assembled pier and construction method thereof Download PDFInfo
- Publication number
- CN112853946A CN112853946A CN202110290255.6A CN202110290255A CN112853946A CN 112853946 A CN112853946 A CN 112853946A CN 202110290255 A CN202110290255 A CN 202110290255A CN 112853946 A CN112853946 A CN 112853946A
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- grouting
- sleeve
- bearing platform
- pier stud
- grout
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- 238000010276 construction Methods 0.000 title claims abstract description 16
- 239000011440 grout Substances 0.000 claims abstract description 52
- 239000000463 material Substances 0.000 claims abstract description 46
- 229910000831 Steel Inorganic materials 0.000 claims abstract description 18
- 239000010959 steel Substances 0.000 claims abstract description 18
- 238000004519 manufacturing process Methods 0.000 claims description 18
- 230000002787 reinforcement Effects 0.000 claims description 17
- 239000004567 concrete Substances 0.000 claims description 15
- 238000009417 prefabrication Methods 0.000 claims description 8
- 239000004570 mortar (masonry) Substances 0.000 claims description 6
- 238000011065 in-situ storage Methods 0.000 claims description 3
- 238000012360 testing method Methods 0.000 claims description 3
- 125000006850 spacer group Chemical group 0.000 claims 3
- 239000010410 layer Substances 0.000 description 10
- 239000002184 metal Substances 0.000 description 8
- 229910001294 Reinforcing steel Inorganic materials 0.000 description 5
- 238000005516 engineering process Methods 0.000 description 3
- 230000003014 reinforcing effect Effects 0.000 description 3
- 230000000694 effects Effects 0.000 description 2
- 238000001125 extrusion Methods 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 238000003912 environmental pollution Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 239000011241 protective layer Substances 0.000 description 1
- 239000011150 reinforced concrete Substances 0.000 description 1
- 238000011160 research Methods 0.000 description 1
Images
Classifications
-
- 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
-
- 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
- E01D19/005—Piers, trestles, bearings, expansion joints or parapets specially adapted for portable or sectional bridges
-
- 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 grouting sleeve, an assembled pier connected with the grouting sleeve and a construction method of the assembled pier, wherein the assembled pier comprises a cylinder body, gaskets and a grouting material layer, wherein the cylinder body is internally provided with a grouting cavity, the gaskets are respectively arranged at two ends of the cylinder body, and the grouting material layer is filled in the grouting cavity of the cylinder body; the upper part of the cylinder body is provided with a grout outlet communicated with the grouting cavity, the lower part of the cylinder body is provided with a grout inlet communicated with the grouting cavity, a connecting steel bar is anchored in the grouting material layer, and the end part of the connecting steel bar penetrates through the gasket and extends to the outside of the cylinder body; its reliable structure, construction convenience is swift, and the effectual grout material that prevents follows the sleeve roll-off has strengthened the adhesion stress of grout material and sleeve inner wall.
Description
Technical Field
The invention relates to the technical field of prefabricated and assembled concrete structures, in particular to a grouting sleeve, an assembled pier connected with the grouting sleeve and a construction method of the assembled pier.
Background
With the continuous progress of modern industrial technology, engineering construction is developing towards a green and sustainable trend. The concrete structure prefabrication and assembly technology is used as a product under the background of the era, has the characteristics of controllable production quality standard, high industrialization degree, short field operation time, low environmental pollution and the like, simultaneously shortens traffic delay and road closure caused by urban building or bridge construction, and can provide better service for the public. The technology adopts an industrialized prefabrication factory to replace the traditional cast-in-place, and prefabricated parts are assembled into a complete structure through various connecting components, so that the connecting joints among the structures are the key for ensuring the structure to work as a whole.
Grout sleeve is a attach fitting commonly used in the prefabricated reinforced concrete structure, and its theory of operation is: the stress reinforcing steel bars in the two structures are inserted into the sleeve from the two ends of the sleeve respectively, grouting material is poured into the sleeve, and the grouting material wraps the reinforcing steel bars to form bonding force, so that force is effectively transmitted between the reinforcing steel bars of the two members. In order to ensure the connection strength of the grouting sleeve, the length of the steel bar embedded into the grouting material is required to exceed 8d (d represents the diameter of the steel bar) by the technical specification of grouting connection application of the steel bar sleeve (JGJ355-2015) in China, so that the sufficient bonding strength between the grouting material and the steel bar is ensured.
However, engineering experience and experimental research show that the bonding failure mode of the grouting sleeve is mainly bonding failure between grouting material and the inner wall of the sleeve, namely, the grouting material and the reinforcing steel bars slide out of the sleeve together, and the connection strength of the grouting sleeve is reduced due to the design defects of the existing grouting sleeve on the structural details; meanwhile, construction errors are inevitable in actual engineering, and the phenomenon of eccentricity of the steel bars often occurs in the assembly of the prefabricated parts, namely the steel bars are not positioned on the central shaft of the sleeve, so that the thickness of the concrete protective layer of the steel bars is reduced to be even zero, and the connection strength is reduced.
Disclosure of Invention
In order to solve the technical problems, the invention provides a grouting sleeve, an assembled pier connected with the grouting sleeve and a construction method of the assembled pier.
The technical scheme for solving the technical problems is as follows: a grouting sleeve comprises a cylinder body, gaskets and a grouting material layer, wherein the cylinder body is internally provided with a grouting cavity;
the upper portion of barrel is provided with the grout outlet with the grout chamber intercommunication, and the lower part of barrel is provided with the grout inlet with the grout chamber intercommunication, and the anchor has the connecting reinforcement in the grout material layer, and the tip of connecting reinforcement runs through the gasket and extends to the barrel outside.
Further, the outer wall of the barrel is provided with a plurality of uniformly distributed rings, the outer wall of the barrel is extruded to form a groove structure through the rings, and the inner wall of the barrel is extruded to form a protruding structure.
Furthermore, the gasket is of a hollow circular ring structure, and the outer diameter of the gasket is matched with the inner diameter of the cylinder body.
Furthermore, the gaskets are two, and a space is reserved between the two gaskets.
Furthermore, the outer wall of the connecting reinforcing steel bar is provided with a raised thread.
Further, the grouting material is concrete mortar formed by mixing fine aggregate.
The invention also provides an assembled pier connected by the grouting sleeve, which comprises the grouting sleeve, a pier stud and a bearing platform, wherein the pier stud is arranged at the upper end of the bearing platform, the grouting sleeve is embedded at the inner bottom end of the pier stud, a pier stud longitudinal rib is arranged in the pier stud, and the lower end of the pier stud longitudinal rib is anchored in a grouting material layer in the grouting sleeve;
a bearing platform longitudinal rib is arranged in the bearing platform, and the upper end of the bearing platform longitudinal rib penetrates through the top surface of the bearing platform and is anchored in the grouting material layer of the grouting sleeve; grout sleeve's grout inlet and grout outlet are connected with rubber hose respectively, and rubber hose's tip runs through the pier stud and extends to the pier stud outside.
The invention also provides a construction method of the assembled pier connected by the grouting sleeve, which comprises the following steps:
s1, prefabricating the pier stud, comprising the following steps:
s1.1: manufacturing pier column templates in a prefabrication factory, and manufacturing a bottom template first, so that the position of the grouting sleeve is conveniently positioned; fixing the grouting sleeve at the corresponding position of the bottom die, binding and installing pier column stirrups, inserting pier column longitudinal reinforcements into the grouting sleeve, and binding and positioning the pier column longitudinal reinforcements on the stirrups;
s1.2, manufacturing the other part of the template, connecting one end of the rubber hose with a grout inlet of the grouting sleeve, placing one end of the rubber hose outside the template, and connecting a grout outlet with the rubber hose in the same way.
S1.3: and pouring concrete, curing for 28 days and waiting for the member to be molded.
S2: the method for manufacturing the prefabricated bearing platform comprises the following steps:
s2.1: and (4) manufacturing a bearing platform template in a prefabrication factory, directly finishing the erection of the whole structural template, and not arranging a template on the top.
S2.2: and manufacturing a bearing platform reinforcement cage, placing the bearing platform reinforcement cage in a template for positioning, inserting the bearing platform longitudinal ribs, and exposing the reserved length at the top of the bearing platform for inserting into a grouting sleeve at the bottom of the pier stud.
S3.3: and pouring concrete, vibrating, leveling the surface, maintaining for 28 days and waiting for the member to be molded.
S3, field assembly: and (3) transporting the prefabricated pier stud and the bearing platform to a construction site or a test site, firstly installing and fixing the bearing platform, hoisting the pier stud to ensure that the steel bars exposed in the bearing platform are inserted into the grouting sleeve at the bottom of the pier stud in an aligning manner, and carrying out plastering treatment on the contact surface of the pier stud and the bearing platform.
S4, grouting: the grouting material is prepared by utilizing a concrete mortar machine, the grouting machine is used for grouting from a grout inlet through a rubber hose, and the grouting mode is grouting until the grouting material overflows from a grout outlet through the rubber hose. The rubber hose is folded and tied tightly to prevent the grouting material in the sleeve from flowing, and redundant rubber hose can be cut off after the grouting material in the sleeve is initially solidified.
S5, maintaining the components: and maintaining the assembled and grouted component in situ until the component is molded.
The invention has the following beneficial effects: the grouting sleeve, the assembled pier connected with the grouting sleeve and the construction method of the assembled pier are reliable in structure and convenient and rapid to construct, and the grouting sleeve and the grouting material form a mechanical engagement effect through the circular ring formed by extrusion on the wall of the grouting sleeve and the bulge of the inner wall, so that the bonding force between the grouting material and the inner wall of the sleeve is enhanced. In addition, the metal gasket has been welded to grout sleeve tip, can effectively prevent the axial slip of grout material in the sleeve, eliminates the grout material and the too big bonding failure phenomenon that leads to of sleeve inner wall relative slip, reinforcing grout sleeve's joint strength. In addition, the metal gaskets are hollow circular rings, the diameter of the inner circular ring is equal to that of the connecting steel bars, the connecting steel bars are allowed to pass through, two metal gaskets are arranged at each end of each metal gasket, and the steel bars can be guaranteed to be parallel to the axis of the sleeve after passing through the central circular holes of the two gaskets simultaneously, so that the eccentric phenomenon cannot occur.
Drawings
FIG. 1 is a schematic view of a grouting sleeve according to the present invention;
FIG. 2 is a schematic view of a bridge pier structure according to the present invention;
FIG. 3 is a schematic view of the structure of the platform of the present invention;
FIG. 4 is a schematic view of the pier-cap connection of the present invention;
fig. 5 is a top view of the pier stud of the present invention;
the reference numerals shown in fig. 1 to 5 are respectively expressed as: 1-barrel, 2-gasket, 3-grouting layer, 4-grout outlet, 5-grout inlet, 6-connecting steel bar, 7-ring, 8-pier column, 9-bearing platform, 10-pier column longitudinal bar, 11-bearing platform longitudinal bar and 12-rubber hose.
Detailed Description
The principles and features of this invention are described below in conjunction with the following drawings, which are set forth by way of illustration only and are not intended to limit the scope of the invention.
As shown in fig. 1, the grouting sleeve comprises a cylinder body 1 with a grouting cavity therein, gaskets 2 respectively arranged at two ends of the cylinder body 1, and a grouting material layer 3 filled in the grouting cavity of the cylinder body 1. Gasket 2 is metal gasket 2, and grout sleeve tip has welded metal gasket 2, can effectively prevent the axial slip of grout material in the sleeve, eliminates the grout material and the too big bonding inefficacy phenomenon that leads to of sleeve inner wall relative slip, reinforcing grout telescopic joint strength. The grouting material is concrete mortar formed by mixing fine aggregate. The outer wall of connecting reinforcement 6 is provided with protruding screw thread, increases the bonding strength between grout material layer 3, improves overall structure intensity.
The upper portion of barrel 1 is provided with the grout outlet 4 with the grout chamber intercommunication, and the lower part of barrel 1 is provided with the grout inlet 5 with the grout chamber intercommunication, and the inherent connecting reinforcement 6 of anchor in grout material layer 3, the tip of connecting reinforcement 6 run through gasket 2 and extend to the barrel 1 outside.
The outer wall of the barrel body 1 is provided with a plurality of uniformly distributed rings 7, the outer wall of the barrel body 1 is extruded to form a groove structure through the rings 7, and the inner wall of the barrel body 1 is extruded to form a protruding structure. The wall of the grouting sleeve is provided with a circular ring 7 formed by extrusion, the inner wall of the grouting sleeve is convex, and a mechanical occlusion effect is formed between the grouting sleeve and the grouting material, so that the bonding force between the grouting material and the inner wall of the sleeve is enhanced.
Further, the gasket 2 is a hollow circular ring 7-shaped structure, and the outer diameter of the gasket 2 is matched with the inner diameter of the cylinder 1. Metal gasket 2 is hollow ring 7 shape, and 7 diameters of interior ring are equal with connecting reinforcement 6, allow connecting reinforcement 6 to pass, and each end respectively sets up two metal gasket 2, and two intervals are 10mm, and the reinforcing bar passes behind two 2 center round holes of gasket simultaneously, can guarantee to be parallel with the sleeve axle center, can't take place eccentric phenomenon.
As shown in fig. 2 to 5, the invention further provides an assembled pier connected by a grouting sleeve, which comprises the grouting sleeve, a pier column 8 and a bearing platform 9, wherein the pier column 8 is arranged at the upper end of the bearing platform 9, the grouting sleeve is embedded at the bottom end of the interior of the pier column 8, a pier column longitudinal rib 10 is arranged in the pier column 8, and the lower end of the pier column longitudinal rib 10 is anchored in the grouting material layer 3 in the grouting sleeve;
a bearing platform longitudinal rib 11 is arranged in the bearing platform 9, and the upper end of the bearing platform longitudinal rib 11 penetrates through the top surface of the bearing platform 9 and is anchored in the grouting material layer 3 of the grouting sleeve; grout outlet 4 and the grout inlet 5 of grout sleeve are connected with rubber hose 12 respectively, and the tip of rubber hose 12 runs through pier 8 and extends to the pier 8 outside.
The invention also provides a construction method of the assembled pier connected by the grouting sleeve, which comprises the following steps:
s1, prefabricating the pier column 8, comprising the following steps:
s1.1: manufacturing a pier column 8 template in a prefabrication factory, and manufacturing a bottom template firstly, so that the position of the grouting sleeve is conveniently positioned; fixing the grouting sleeve at the corresponding position of the bottom die, binding and installing a pier stud 8 stirrup, inserting a pier stud longitudinal rib 10 into the grouting sleeve, and binding and positioning the pier stud longitudinal rib on the stirrup;
s1.2, manufacturing the rest of the template, connecting one end of a rubber hose 12 with a grout outlet 4 of the grouting sleeve, placing one end of the rubber hose outside the template, and connecting a grout inlet 5 with the rubber hose 12 in the same way.
S1.3: and pouring concrete, curing for 28 days and waiting for the member to be molded.
S2: the method for manufacturing the prefabricated bearing platform 9 comprises the following steps:
s2.1: and (3) manufacturing a bearing platform 9 template in a prefabrication factory, directly finishing the erection of the whole structural template, and not arranging a template on the top.
S2.2: and manufacturing a bearing platform 9 reinforcement cage, placing the bearing platform in a template for positioning, inserting the bearing platform longitudinal ribs 11, and exposing the reserved length at the top of the bearing platform 9 for inserting into the grouting sleeve at the bottom of the pier stud 8.
S3.3: and pouring concrete, vibrating, leveling the surface, maintaining for 28 days and waiting for the member to be molded.
S3, field assembly: the prefabricated pier stud 8 and the bearing platform 9 are transported to a construction site or a test site, the bearing platform 9 is installed and fixed firstly, the pier stud 8 is hoisted, so that the steel bars exposed in the bearing platform 9 are inserted into the grouting sleeve at the bottom of the pier stud 8 in an aligning manner, and the contact surface between the pier stud 8 and the bearing platform 9 is subjected to grouting treatment.
S4, grouting: the grouting material is prepared by a concrete mortar machine, and is grouted from the grout inlet 5 through the rubber hose 12 by the grouting machine in a grouting mode until the grouting material overflows from the grout outlet 4 through the rubber hose 12. The rubber hose 12 is folded and tied tightly to prevent the grouting material in the sleeve from flowing, and the redundant rubber hose 12 can be cut off after the grouting material in the sleeve is initially set.
S5, maintaining the components: and maintaining the assembled and grouted component in situ until the component is molded.
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, improvements and the like that fall within the spirit and principle of the present invention are intended to be included therein.
Claims (8)
1. A grouting sleeve is characterized by comprising a cylinder body (1) with a grouting cavity inside, gaskets (2) respectively arranged at two ends of the cylinder body (1) and a grouting material layer (3) filled in the grouting cavity of the cylinder body (1);
the upper portion of barrel (1) be provided with grout outlet (4) that the grout chamber communicates, the lower part of barrel (1) be provided with grout inlet (5) that the grout chamber communicates, the inherent connecting reinforcement (6) of anchor in grout bed (3), the tip of connecting reinforcement (6) runs through gasket (2) and extend to the barrel (1) outside.
2. A grouting sleeve as claimed in claim 1, characterised in that the outer wall of the barrel (1) is provided with a plurality of evenly distributed rings (7), and the outer wall of the barrel (1) is pressed into a groove structure by the rings (7) and the inner wall of the barrel (1) is pressed into a protrusion structure.
3. A grouting sleeve as claimed in claim 1, characterised in that the spacer (2) is of hollow circular ring (7) configuration and that the outer diameter of the spacer (2) is adapted to the inner diameter of the barrel (1).
4. A grouting sleeve as claimed in any one of claims 1 to 3, characterised in that the spacers (2) are in two pieces, and that there is a space between the two pieces (2).
5. A grouting sleeve as claimed in claim 4, characterised in that the outer wall of the connecting reinforcement (6) is provided with a raised thread.
6. The grouting sleeve of claim 5, wherein the grouting material is concrete mortar formed by mixing fine aggregates.
7. An assembled pier connected by a grouting sleeve, which is characterized by comprising the grouting sleeve, a pier stud (8) and a bearing platform (9) as claimed in any one of claims 1 to 6, wherein the pier stud (8) is arranged at the upper end of the bearing platform (9), the grouting sleeve is embedded at the inner bottom end of the pier stud (8), a pier stud longitudinal rib (10) is arranged in the pier stud (8), and the lower end of the pier stud longitudinal rib (10) is anchored in a grouting material layer (3) in the grouting sleeve;
a bearing platform longitudinal rib (11) is arranged in the bearing platform (9), and the upper end of the bearing platform longitudinal rib (11) penetrates through the top surface of the bearing platform (9) and is anchored in a grouting material layer (3) of the grouting sleeve; grout sleeve's grout outlet (4) and grout inlet (5) are connected with rubber hose (12) respectively, just the tip of rubber hose (12) runs through pier stud (8) and extend to pier stud (8) outside.
8. A construction method of an assembled pier connected by grouting sleeves is characterized by comprising the following steps:
s1, prefabricating the pier stud (8), comprising the following steps:
s1.1: manufacturing a pier column (8) template in a prefabrication factory, and manufacturing a bottom template firstly, so that the position of the grouting sleeve is conveniently positioned; fixing the grouting sleeve at the corresponding position of the bottom die, binding and installing a pier stud (8) stirrup, inserting a pier stud longitudinal rib (10) into the grouting sleeve, and binding the pier stud longitudinal rib on the stirrup for positioning;
s1.2, manufacturing the other part of the template, connecting one end of a rubber hose (12) with a grout outlet (4) of a grouting sleeve, placing one end of the rubber hose outside the template, and connecting a grout inlet (5) with the rubber hose (12) in the same way;
s1.3: pouring concrete, curing for 28 days and waiting for the member to be molded;
s2: manufacturing a prefabricated bearing platform (9), comprising the following steps:
s2.1: a bearing platform (9) template is manufactured in a prefabrication factory, the whole structure template is directly erected, and no template is arranged at the top;
s2.2: manufacturing a steel reinforcement cage of the bearing platform (9), placing the steel reinforcement cage in a template for positioning, inserting the longitudinal ribs (11) of the bearing platform, exposing the reserved length at the top of the bearing platform (9) and inserting the reserved length into a grouting sleeve at the bottom of the pier stud (8);
s3.3: pouring concrete, vibrating, leveling the surface, maintaining for 28 days and waiting for the member to be molded;
s3, field assembly: transporting the prefabricated pier stud (8) and the bearing platform (9) to a construction site or a test site, firstly installing and fixing the bearing platform (9), hoisting the pier stud (8) to enable the exposed steel bars in the bearing platform (9) to be inserted into a grouting sleeve at the bottom of the pier stud (8) in an aligning manner, and carrying out plastering treatment on the contact surface of the pier stud (8) and the bearing platform (9);
s4, grouting: preparing grouting material by using a concrete mortar machine, grouting from a grout inlet (5) through a rubber hose (12) by using the grouting machine in a grouting mode, and enabling the grouting material to overflow from a grout outlet (4) through the rubber hose (12); the rubber hose (12) is folded and tightly bound to prevent the grouting material in the sleeve from flowing, and the redundant rubber hose (12) can be cut off after the grouting material in the sleeve is initially set;
s5, maintaining the components: and maintaining the assembled and grouted component in situ until the component is molded.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110290255.6A CN112853946A (en) | 2021-03-18 | 2021-03-18 | Grouting sleeve, grouting sleeve connected assembled pier and construction method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110290255.6A CN112853946A (en) | 2021-03-18 | 2021-03-18 | Grouting sleeve, grouting sleeve connected assembled pier and construction method thereof |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN112853946A true CN112853946A (en) | 2021-05-28 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202110290255.6A Pending CN112853946A (en) | 2021-03-18 | 2021-03-18 | Grouting sleeve, grouting sleeve connected assembled pier and construction method thereof |
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| Country | Link |
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| CN (1) | CN112853946A (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113356012A (en) * | 2021-06-25 | 2021-09-07 | 青海省交通建设管理有限公司 | Assembly type bridge structure in tunnel and construction method thereof |
| CN113445545A (en) * | 2021-06-29 | 2021-09-28 | 同济大学建筑设计研究院(集团)有限公司 | Underwater steel structure connection point evacuation grouting protection structure and protection construction method |
| CN113668361A (en) * | 2021-06-04 | 2021-11-19 | 武汉理工大学 | Fabricated concrete double-layer gate-type pier structure and construction method |
| CN114411531A (en) * | 2022-01-26 | 2022-04-29 | 贵州路桥集团有限公司 | Anti-seismic device and anti-seismic structure for bridge |
| CN114892537A (en) * | 2022-07-14 | 2022-08-12 | 中国建筑第六工程局有限公司 | Pier connection construction equipment is assembled in prefabrication under water |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN113668361A (en) * | 2021-06-04 | 2021-11-19 | 武汉理工大学 | Fabricated concrete double-layer gate-type pier structure and construction method |
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| CN114892537A (en) * | 2022-07-14 | 2022-08-12 | 中国建筑第六工程局有限公司 | Pier connection construction equipment is assembled in prefabrication under water |
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Application publication date: 20210528 |
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