CN111005307A - Rapid-masonry reinforced concrete pier stud and construction method thereof - Google Patents
Rapid-masonry reinforced concrete pier stud and construction method thereof Download PDFInfo
- Publication number
- CN111005307A CN111005307A CN201911300552.3A CN201911300552A CN111005307A CN 111005307 A CN111005307 A CN 111005307A CN 201911300552 A CN201911300552 A CN 201911300552A CN 111005307 A CN111005307 A CN 111005307A
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- pier stud
- reinforced concrete
- prefabricated
- concrete pier
- core part
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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
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D27/00—Foundations as substructures
- E02D27/32—Foundations for special purposes
- E02D27/42—Foundations for poles, masts or chimneys
-
- 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
- E01D2101/28—Concrete reinforced prestressed
- E01D2101/285—Composite prestressed concrete-metal
Abstract
The invention discloses a rapid reinforced concrete pier stud and a construction method thereof, wherein pier stud blocks for constructing the reinforced concrete pier stud are divided into different shapes and smaller sizes according to design requirements, prefabricated pier stud blocks are connected into a whole by applying tensile force to prestressed tendons, the outer side of the core part of the reinforced concrete pier stud is coated with a steel wire mesh and is externally coated with cement mortar or concrete is filled between the core part and an externally embedded steel pipe, the integrity of the reinforced concrete pier stud is improved, and the bearing capacity and the durability of the reinforced concrete pier are improved simultaneously.
Description
Technical Field
The invention relates to the technical field of bridge engineering, in particular to a rapid-masonry reinforced concrete pier stud and a construction method thereof.
Background
The pier column is a bearing part for bearing an upper structure in civil engineering, and is an important component in the engineering of bridges, overpasses, ramp bridges, overpasses and the like. Traditional pier stud is mainly through the mode of concrete cast in situ, but this kind of mode need set up the scaffold frame on site, dress template and tear the template open, has that work load is big, influence existing traffic and environment in the construction area, construction cycle length, complicated environment area construction difficulty and the big scheduling problem of construction quality guarantee degree of difficulty.
In order to solve the problems, the construction of the bridge pier column is carried out in a prefabrication and assembly mode in the prior art, and the technology is carried out in a factory production and field assembly construction mode. In order to meet the requirements of the current specifications, most of the assembly and connection of the prefabricated segmental pier columns at the current stage adopt an equal cast-in-place mode, and the splicing joint of the segmental pier columns also basically adopts a wet connection mode, but the connection mode of the reinforcing steel bars on site is difficult to align; in order to reduce the number of the abutted seams, the size and the weight of the prefabricated segments are large, and the prefabricated segments are difficult to transport and hoist. The special design of the hoisting equipment which is convenient to hoist, transport and install is needed for the pier body of the large-size prefabricated segment, the efficiency is low, and the construction is difficult. The other mode is that the prefabricated pier shaft of many sections of adopting dry joint, and this kind of mode can solve the problem that ordinary reinforcing bar on-the-spot counterpoint is connected difficultly, but this type prefabricated pier stud compares with traditional cast-in-place pier stud, and the wholeness is poor, and anti side bearing capacity under the earthquake effect is low, the displacement is big, and section piece joint also becomes the weak link of durability easily.
Disclosure of Invention
In order to overcome the defects of the prior art, the invention provides a rapid-masonry reinforced concrete pier stud and a construction method thereof, and aims to solve the problems that the weight and the size of a prefabricated segmental pier stud are large, steel bars are difficult to align and connect, the integrity is poor, the side bearing capacity is low, and a seam is easy to become a weak link in durability.
In order to achieve the purpose, the invention provides a rapid masonry reinforced concrete pier stud, which comprises a pier stud foundation, prestressed tendons, a reinforced concrete pier stud core part and an outer packaging structure, wherein the reinforced concrete pier stud core part consists of a plurality of vertical pier stud sections arranged from bottom to top along the axis of a pier body, at least part of the vertical pier stud sections consist of a plurality of prefabricated pier stud blocks arranged horizontally, and the prefabricated pier stud blocks on the vertical pier stud sections adjacent to each other from top to bottom are constructed in a staggered manner; one end of the prestressed tendon is anchored in the pier stud foundation, and the other end of the prestressed tendon passes through each prefabricated pier stud block and is anchored at the top of the core part of the reinforced concrete pier stud; the outer side of the core part of the reinforced concrete pier stud is coated with an outer wrapping structure.
As a further improved technical scheme, the outer packaging structure comprises a steel wire mesh or a steel bar mesh or a fiber material mesh which is coated outside the core part of the reinforced concrete pier stud, and cement mortar which is smeared outside the steel wire mesh or the steel bar mesh or the fiber material mesh; or the outer packing structure comprises a steel pipe or a fiber composite material pipe nested at the periphery of the core part of the reinforced concrete pier column and concrete poured into a cavity formed between the core part of the reinforced concrete pier column and the steel pipe or the fiber composite material pipe.
As a preferred scheme, the vertical pier column segment arranged at the top of the reinforced concrete pier column core part is an integrally prefabricated vertical pier column segment, and the vertical pier column segment arranged at the middle of the reinforced concrete pier column core part is a vertical pier column segment assembled by the prefabricated pier column blocks.
As a further improved technical scheme, a prestressed tendon pore channel is reserved on a prefabricated pier stud block body on the middle vertical pier stud segment, and a position for anchoring the prestressed tendon is reserved on the top vertical pier stud segment.
As a further improved technical scheme, the prefabricated pier stud block is provided with construction steel bars according to requirements.
As a further improved technical scheme, shear keys are arranged at horizontal abutted seams between prefabricated pier stud blocks and/or at horizontal abutted seams of pier stud foundations. The shear key can be a steel bar or profile steel and the like, and the shear key is used for resisting the shear force at the horizontal abutted seam on one hand and is used for installing and positioning each prefabricated pier block on the other hand.
Preferably, the prestressed tendons are made of steel strands, prestressed twisted steel bars or fiber composite material tendons.
As a preferred scheme, part of the prestressed tendons are set to be steel bars with low yield points as energy-consuming steel bars according to earthquake-proof requirements.
As a further improved technical scheme, the cross sections of the vertical pier column segments are combined into a square or rectangular or circular or equilateral polygon according to the shape of the prefabricated pier column block, and the combined cross section is of a solid structure or a hollow structure.
A construction method for quickly building reinforced concrete pier stud comprises the following steps:
firstly, constructing a pier stud foundation, and reserving prestressed tendons on the pier stud foundation according to design requirements;
secondly, building prefabricated pier stud blocks of adjacent vertical pier stud segments in a staggered manner from bottom to top along the axis of the reinforced concrete pier stud, and enabling the prestressed tendons to penetrate through reserved channels on the prefabricated pier stud blocks respectively;
anchoring the prestressed tendons to the vertical pier stud segment at the top when the vertical pier stud segment at the top is built, and stretching the prestressed tendons to form a core part of the reinforced concrete pier stud;
fourthly, winding a steel wire mesh or a steel bar mesh or a fiber material mesh on the periphery of the core part of the reinforced concrete pier stud; or arranging a steel pipe or a fiber composite material pipe at the periphery of the pier stud;
fifthly, plastering cement mortar on the surface of the pier column externally wound with the steel wire mesh or the steel bar mesh or the fiber material mesh; or pouring concrete in an annular cavity formed between the steel pipe or the fiber composite material pipe and the core part of the reinforced concrete pier column to form the reinforced concrete pier column.
The invention has the following beneficial effects:
(1) the prefabricated pier stud block for building the reinforced concrete pier stud can be divided into different shapes and smaller sizes according to transportation conditions, hoisting capacity and design requirements, the prefabricated pier stud block with the smaller size is more convenient to transport, build and install, and the requirements on transportation equipment, transportation routes and hoisting equipment are correspondingly reduced;
(2) the pier stud blocks are prefabricated in a factory, so that batch production can be realized, and the production efficiency and the product quality are improved;
(3) during on-site construction, the construction process is similar to the traditional masonry structure construction process, and workers can easily master and ensure the construction quality;
(4) the prefabricated pier column blocks are connected into a whole by applying tension to the prestressed tendons, so that the prefabricated pier column blocks bear the load of an upper bridge structure, the follow-up work can be further promoted, and the construction progress is accelerated;
(5) the reinforced concrete pier stud core part is externally coated with a steel wire mesh or a steel bar mesh or a fiber material mesh, cement mortar is smeared outside the mesh, or a steel pipe or a fiber composite material pipe is nested outside the reinforced concrete pier stud core part, and concrete is poured into a cavity formed between the reinforced concrete pier stud core part and the steel pipe or the fiber composite material pipe, so that the integrity of the reinforced concrete pier stud can be improved, the bearing capacity of the reinforced concrete pier stud is improved, and if the reinforced concrete pier stud core part needs to be repaired after an earthquake, the bottom is only required to be externally coated with cement mortar or the steel pipe or the fiber composite material pipe filled with concrete is partially replaced;
(6) when the steel pipe or the fiber composite material pipe is adopted, the steel pipe or the fiber composite material pipe can also be used as a template, so that the procedures of steel bar binding, template erecting and the like required by the traditional wet connection are avoided, the wet operation range is reduced, and the site construction is more convenient;
(7) the post-tensioning prestress technology can realize the connection of the prefabricated pier stud blocks, can also realize the control of the residual deformation of the spliced pier stud after the earthquake, and improves the restorable functionality of the structure;
(8) the core part of the reinforced concrete pier stud is coated with the steel wire mesh and coated with cement mortar or embedded with the steel pipe filled with concrete, so that the prestressed tendons are in a closed environment, and the durability of the prestressed tendons can be improved.
Drawings
Fig. 1 is a schematic structural view of a reinforced concrete pier stud which is quickly built according to an embodiment of the present invention;
FIG. 2 is a cross-sectional view taken at A-A of FIG. 1;
FIG. 3 is a cross-sectional view taken at B-B of FIG. 1;
FIG. 4 is a cross-sectional view taken at C-C of FIG. 1;
fig. 5 is a schematic structural view of a reinforced concrete pier stud which is quickly built according to a second embodiment of the invention;
FIG. 6 is a cross-sectional view taken at D-D of FIG. 5;
FIG. 7 is a cross-sectional view taken at E-E of FIG. 5;
FIG. 8 is a cross-sectional view at F-F of FIG. 5;
fig. 9 is a schematic structural view of a reinforced concrete pier stud which is quickly built according to a third embodiment of the invention;
FIG. 10 is a cross-sectional view taken at G-G of FIG. 9;
FIG. 11 is a cross-sectional view taken at H-H in FIG. 9;
fig. 12 is a cross-sectional view taken at J-J in fig. 9.
In the figure: 1. pier stud foundation, 2, prestressing tendons, 31, prefabricated pier stud block I, 32, prefabricated pier stud block II, 33, prefabricated pier stud block III, 34, prefabricated pier stud block IV, 35, prefabricated pier stud block V, 4, prestressing tendons pore, 51, horizontal joint, 52, vertical joint, 6, steel wire net, 7, cement mortar, 8, concrete, 9, steel pipe.
Detailed Description
The technical solution of the present invention is explained in detail with reference to the accompanying drawings and specific embodiments.
Example one
As shown in fig. 1 to 4, a reinforced concrete pier stud capable of being quickly built comprises a pier stud foundation 1, a reinforced concrete pier stud core part, prestressed tendons 2, a steel wire mesh 6 and cement mortar 7; the reinforced concrete pier stud core part consists of a bottom vertical pier stud segment, a plurality of middle vertical pier stud segments and a top vertical pier stud segment which are sequentially arranged along the axis of the pier body from bottom to top; vertical pier stud segment in bottom and middle vertical pier stud segment comprise a plurality of prefabricated pier stud blocks that the level was arranged, and wherein vertical pier stud segment in bottom comprises prefabricated pier stud block 31 and prefabricated pier stud block four 34, and middle vertical pier stud segment comprises prefabricated pier stud block two 32 and prefabricated pier stud block three 33, and vertical pier stud segment in top is five 35 of prefabricated pier stud block, five 35 of prefabricated pier stud block are whole prefabricated vertical pier stud segments.
The precast pier stud block 31, the precast pier stud block two 32, the precast pier stud block three 33 and the precast pier stud block four 34 are reserved with a prestressed tendon hole passage 4, the plane sizes of the precast pier stud block one 31, the precast pier stud block two 32, the precast pier stud block three 33 and the precast pier stud block four 34 are the same as the prestressed tendon hole passage 4 in positioning, and the precast pier stud blocks on the vertical pier stud sections adjacent to each other up and down are alternately built to the precast pier stud block five 35 at the top during construction.
Reserving a position for anchoring a prestressed tendon at the top of the prefabricated pier stud block five 35 at the top, wherein one end of the prestressed tendon 2 is anchored in the pier stud foundation 1, and the other end of the prestressed tendon 2 penetrates through a prestressed tendon pore passage 4 on each prefabricated pier stud block and is anchored on the prefabricated pier stud block five 35 at the top to form a reinforced concrete pier stud core part; the steel wire mesh 6 is coated on the outer side of the core part of the reinforced concrete pier stud, and the cement mortar 7 is smeared outside the steel wire mesh 6. In other embodiments, the steel wire mesh 6 may be a steel mesh or a fiber material mesh.
The prestressed tendons 2 can adopt steel strands or prestressed thread steel bars or fiber composite material tendons, and prestress is applied by stretching the prestressed tendons 2 penetrating through the prefabricated pier stud blocks during construction, so that the core part of the reinforced concrete pier stud and the pier stud foundation 1 are connected into a whole, and the construction progress is accelerated. And when the prestressed tendons are subjected to the action of an earthquake, the prestressed tendons 2 can also provide self-resetting capability to control the residual deformation of the pier stud.
According to the design requirement, a low-yield-point steel bar can be arranged at the position of part of the prestressed tendon pore passage 4, and the low-yield-point steel bar and the prestressed tendon form a mixed reinforcement so as to provide lateral rigidity, bearing capacity and energy consumption capacity for the pier column.
Horizontal contact surface between the prefabricated pier stud block from top to bottom and/or with the horizontal contact surface of pier stud basis forms horizontal piece 51, and horizontal piece 51 department is provided with the shear key. The shear key can be a steel bar or profile steel and the like, and the shear key is used for resisting the shear force at the horizontal abutted seam on one hand and is used for installing and positioning each prefabricated pier block on the other hand.
Vertical abutted seams 52 are formed on the longitudinal contact surfaces between the prefabricated pier stud blocks in the same horizontal plane.
The prefabricated pier column block body can be internally provided with construction steel bars according to requirements so as to enhance the bearing capacity of the prefabricated pier column block.
The cross sections of the vertical pier stud segments are combined into a square according to the shape of the prefabricated pier stud blocks.
A construction method for quickly building reinforced concrete pier stud comprises the following steps:
firstly, manufacturing prefabricated pier stud blocks in a factory, and transporting the prefabricated pier stud blocks to a construction site for building;
secondly, constructing a pier stud foundation and reserving a prestressed tendon 2 on the pier stud foundation according to design requirements as shown in figure 1;
thirdly, as shown in fig. 1 and 2, building a bottom vertical pier stud segment consisting of a prefabricated pier stud block I31 and a prefabricated pier stud block IV 34 along the axis of the reinforced concrete pier stud, wherein the prestressed tendons 2 penetrate through the prestressed tendon pore passages 4 on the prefabricated pier stud block I31 and the prefabricated pier stud block IV 34 during building;
fourthly, as shown in fig. 1 and 3, constructing vertical pier stud segments in the middle by alternately constructing prefabricated pier stud blocks two 32 and prefabricated pier stud blocks three 33, and enabling the prestressed tendons 2 to penetrate through the prefabricated pier stud blocks two 32 of the reserved hole channels and the prestressed tendon hole channels 4 of the prefabricated pier stud blocks three 33;
fifthly, alternately building the middle vertical pier stud segment until finally building the top vertical pier stud segment formed by the top prefabricated pier stud block body five 35, anchoring the prestressed tendon 2 to the top prefabricated pier stud block body five 35, and forming the core part of the reinforced concrete pier stud by tensioning the prestressed tendon 2;
and sixthly, winding a steel wire mesh 6 or a reinforcing mesh or a fiber material mesh on the periphery of the core part of the reinforced concrete pier stud, and smearing cement mortar 7 on the outer surface of the reinforced concrete pier stud to form the reinforced concrete pier stud.
Example two
As shown in fig. 5 to 8, the difference between the rapid-masonry reinforced concrete pier stud provided by the embodiment and the first embodiment is that the cross sections of the vertical pier stud segments are combined into a rectangle according to the shape of the prefabricated pier stud blocks, so as to meet the requirements of engineering projects. The rest of the structure is the same as the first embodiment.
The construction method for quickly building the reinforced concrete pier stud provided by the embodiment is different from the construction method in the first embodiment in that the prefabricated pier stud blocks of the vertical pier stud segment are constructed in a staggered joint mode through the combination of the prefabricated pier stud blocks in construction, so that the diversity of the section forms of the reinforced concrete pier stud can be realized.
EXAMPLE III
As shown in fig. 9 to 12, the reinforced concrete pier stud for rapid masonry provided by the present embodiment is different from the first embodiment in that a steel pipe 9 is embedded at the periphery of a core portion of the reinforced concrete pier stud, and concrete 8 is poured into a cavity formed between the core portion of the reinforced concrete pier stud and the steel pipe 9. Alternatively, the steel pipe 9 may also be a fiber composite pipe. The rest of the structure is the same as the first embodiment.
The construction method for quickly building the reinforced concrete pier stud provided by the embodiment is different from the first embodiment in that, as shown in fig. 10 to 12, in the sixth step, a steel pipe 9 or a fiber composite material pipe is arranged at the periphery of the core part of the reinforced concrete pier stud, and concrete 8 is poured in an annular cavity formed between the steel pipe 9 or the fiber composite material pipe and the core part of the reinforced concrete pier stud to form the reinforced concrete pier stud.
Claims (10)
1. A reinforced concrete pier stud is built quickly, and the reinforced concrete pier stud is characterized by comprising a pier stud foundation, prestressed tendons, a reinforced concrete pier stud core part and an outer packaging structure, wherein the reinforced concrete pier stud core part consists of a plurality of vertical pier stud sections arranged from bottom to top along the axis of a pier body, at least part of the vertical pier stud sections consist of a plurality of prefabricated pier stud blocks arranged horizontally, and the prefabricated pier stud blocks on the vertical pier stud sections adjacent to each other from top to bottom are built in a staggered mode; one end of the prestressed tendon is anchored in the pier stud foundation, and the other end of the prestressed tendon passes through each prefabricated pier stud block and is anchored at the top of the core part of the reinforced concrete pier stud; the outer side of the core part of the reinforced concrete pier stud is coated with an outer wrapping structure.
2. The quick-masonry reinforced concrete pier stud according to claim 1, wherein the outer covering structure comprises a steel wire mesh or a steel mesh or a fiber material mesh coated outside the core part of the reinforced concrete pier stud, and cement mortar smeared outside the steel wire mesh or the steel mesh or the fiber material mesh; or the outer packing structure comprises a steel pipe or a fiber composite material pipe nested at the periphery of the core part of the reinforced concrete pier column and concrete poured into a cavity formed between the core part of the reinforced concrete pier column and the steel pipe or the fiber composite material pipe.
3. The fast-masonry reinforced concrete pier stud according to claim 2, wherein the vertical pier stud segment arranged at the top of the reinforced concrete pier stud core part is an integral prefabricated vertical pier stud segment, and the vertical pier stud segment arranged at the middle of the reinforced concrete pier stud core part is a vertical pier stud segment assembled by the prefabricated pier stud blocks.
4. The quick-masonry reinforced concrete pier stud according to claim 3, wherein a prestressed tendon duct is reserved on the prefabricated pier stud block on the middle vertical pier stud segment, and a position for anchoring the prestressed tendon is reserved on the top vertical pier stud segment.
5. The quick masonry reinforced concrete pier stud according to claim 4, wherein the prefabricated pier stud blocks are provided with construction rebar as required.
6. The fast-masonry reinforced concrete pier stud according to claim 5, wherein a shear key is provided at a horizontal abutted seam between the prefabricated pier stud blocks and/or at a horizontal abutted seam with the pier stud foundation.
7. The quick-masonry reinforced concrete pier stud according to claim 6, wherein the prestressed tendons are made of steel strands, prestressed threaded steel bars or fiber composite material tendons.
8. The fast-masonry reinforced concrete pier stud according to claim 7, wherein part of the prestressed tendons are arranged as reinforcing steel bars with low yield points as energy dissipation reinforcing steel bars according to earthquake-resistant requirements.
9. The quick masonry reinforced concrete pier stud according to any one of claims 1 to 8, wherein the cross sections of the vertical pier stud segments are combined into a square or rectangle or circle or equilateral polygon according to the shape of the prefabricated pier stud block, and the combined cross section is a solid structure or a hollow structure.
10. A construction method for quickly building reinforced concrete pier stud is characterized by comprising the following steps:
firstly, constructing a pier stud foundation, and reserving prestressed tendons on the pier stud foundation according to design requirements;
secondly, building prefabricated pier stud blocks of adjacent vertical pier stud segments in a staggered manner from bottom to top along the axis of the reinforced concrete pier stud, and enabling the prestressed tendons to penetrate through reserved channels on the prefabricated pier stud blocks respectively;
anchoring the prestressed tendons to the vertical pier stud segment at the top when the vertical pier stud segment at the top is built, and stretching the prestressed tendons to form a core part of the reinforced concrete pier stud;
fourthly, winding a steel wire mesh or a steel bar mesh or a fiber material mesh on the periphery of the core part of the reinforced concrete pier stud; or arranging a steel pipe or a fiber composite material pipe at the periphery of the pier stud;
fifthly, plastering cement mortar on the surface of the pier column externally wound with the steel wire mesh or the steel bar mesh or the fiber material mesh; or pouring concrete in an annular cavity formed between the steel pipe or the fiber composite material pipe and the core part of the reinforced concrete pier column to form the reinforced concrete pier column.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201911300552.3A CN111005307A (en) | 2019-12-17 | 2019-12-17 | Rapid-masonry reinforced concrete pier stud and construction method thereof |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201911300552.3A CN111005307A (en) | 2019-12-17 | 2019-12-17 | Rapid-masonry reinforced concrete pier stud and construction method thereof |
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| CN201911300552.3A Pending CN111005307A (en) | 2019-12-17 | 2019-12-17 | Rapid-masonry reinforced concrete pier stud and construction method thereof |
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Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4473985A (en) * | 1982-04-30 | 1984-10-02 | Terence Hunt | Building block |
| CN104321493A (en) * | 2012-03-30 | 2015-01-28 | 范登贝姆普特专利公司 | Building block, and insert to be applied in such a building block |
| CN106192728A (en) * | 2015-03-13 | 2016-12-07 | 宋裕祺 | Precast segment, stacking structure thereof and energy dissipation column |
| CN110042741A (en) * | 2019-03-12 | 2019-07-23 | 中国矿业大学 | A kind of casing constraint Precast Concrete Segmental Bridges pier stud and its construction method |
-
2019
- 2019-12-17 CN CN201911300552.3A patent/CN111005307A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4473985A (en) * | 1982-04-30 | 1984-10-02 | Terence Hunt | Building block |
| CN104321493A (en) * | 2012-03-30 | 2015-01-28 | 范登贝姆普特专利公司 | Building block, and insert to be applied in such a building block |
| CN106192728A (en) * | 2015-03-13 | 2016-12-07 | 宋裕祺 | Precast segment, stacking structure thereof and energy dissipation column |
| CN110042741A (en) * | 2019-03-12 | 2019-07-23 | 中国矿业大学 | A kind of casing constraint Precast Concrete Segmental Bridges pier stud and its construction method |
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Application publication date: 20200414 |
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