CN218323488U - Prefabricated assembled girt structure of regeneration block concrete - Google Patents

Prefabricated assembled girt structure of regeneration block concrete Download PDF

Info

Publication number
CN218323488U
CN218323488U CN202121270462.7U CN202121270462U CN218323488U CN 218323488 U CN218323488 U CN 218323488U CN 202121270462 U CN202121270462 U CN 202121270462U CN 218323488 U CN218323488 U CN 218323488U
Authority
CN
China
Prior art keywords
concrete
block
ring beam
segment
section
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Active
Application number
CN202121270462.7U
Other languages
Chinese (zh)
Inventor
周林仁
陈钰萌
陈兰
刘光荣
田甜
苗帅
单根德
王万方
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
South China University of Technology SCUT
China Construction Fourth Engineering Division Corp Ltd
Original Assignee
South China University of Technology SCUT
China Construction Fourth Engineering Division Corp Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by South China University of Technology SCUT, China Construction Fourth Engineering Division Corp Ltd filed Critical South China University of Technology SCUT
Priority to CN202121270462.7U priority Critical patent/CN218323488U/en
Application granted granted Critical
Publication of CN218323488U publication Critical patent/CN218323488U/en
Active legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Images

Classifications

    • YGENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02WCLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
    • Y02W30/00Technologies for solid waste management
    • Y02W30/50Reuse, recycling or recovery technologies
    • Y02W30/91Use of waste materials as fillers for mortars or concrete

Landscapes

  • Manufacturing Of Tubular Articles Or Embedded Moulded Articles (AREA)

Abstract

The utility model discloses a regenerated block concrete prefabricated assembled ring beam structure, which comprises a regenerated block concrete segment and a disassembly-free template segment; the recycled block concrete segment comprises a waste concrete block body, a longitudinal bar, a hoop bar in a ring beam and common concrete, the hoop bar and the longitudinal bar in the ring beam are bound into a reinforcement cage, the waste concrete block body is placed in the reinforcement cage, the common concrete covers the waste concrete block body and the reinforcement cage, and two ends of the longitudinal bar extend out of the end face of the recycled block concrete segment; exempt from to tear open template section down and include interconnect's bottom plate and curb plate, exempt from to tear open template section down and place between two adjacent regeneration block concrete sections, the terminal surface of bottom plate, curb plate and two adjacent at least regeneration block concrete sections encloses establishes and forms the open cavity in top, and the muscle is indulged in the cavity to two adjacent at least regeneration block concrete sections's indulging, and the muscle is indulged in the ordinary concrete filling cavity cladding, the length of exempting from to tear open template section down is less than the length of upper portion brick.

Description

Prefabricated assembled girt structure of regeneration block concrete
Technical Field
The utility model relates to an assembled collar tie beam technical field, in particular to prefabricated assembled collar tie beam structure of regeneration block concrete.
Background
The ring beam is a concrete beam type component which is arranged at the eaves opening, the window top, the floor, the crane beam top or the elevation of the foundation top surface of the house and is closed and reinforced according to the structure along the horizontal direction of the masonry wall. The novel masonry block can improve the space rigidity of a house, increase the integrity of a building, improve the shearing resistance and tensile strength of masonry blocks, and prevent the house from being damaged by uneven settlement of a foundation, earthquake or other large vibration loads.
Currently, the rings Liang Duowei used in the field are cast in place, but cast in place ring beams have various problems. Firstly, cast-in-place concrete is not easy to vibrate, so that honeycombs and pitted surfaces are easy to appear; secondly, the phenomena of steel bar binding and the phenomenon that the lap joint length does not meet the standard requirement easily exist in site construction, and the engineering quality is influenced; thirdly, the phenomena of dust emission and noise pollution exist in the wet operation of cast-in-place concrete, and the concept of environmental protection is not met; fourthly, the construction safety of concrete pouring through the same vertical plane cross operation is difficult to guarantee; in addition, the masonry of upper brickwork need wait for and just can go on after circle roof beam concrete has certain intensity, influences the efficiency of construction.
SUMMERY OF THE UTILITY MODEL
An object of the utility model is to overcome prior art not enough, provide a prefabricated assembled ring beam structure of regeneration block concrete, accomplish the back with each segmental prefabrication in mill, just carry out the on-the-spot and assemble and pour for installation time has saved the cost of labor.
The technical scheme of the utility model is that: a regenerated block concrete prefabricated assembled ring beam structure comprises a regenerated block concrete segment and a disassembly-free template segment;
the recycled block concrete segment comprises a waste concrete block body, a longitudinal bar, a hoop bar in a ring beam and common concrete, the hoop bar and the longitudinal bar in the ring beam are bound into a reinforcement cage, the waste concrete block body is placed in the reinforcement cage, the common concrete covers the waste concrete block body and the reinforcement cage, and two ends of the longitudinal bar extend out of the end face of the recycled block concrete segment;
exempt from to tear open the template section and include interconnect's bottom plate and curb plate, exempt from to tear open the template section and place between two adjacent regeneration block concrete sections, the terminal surface of bottom plate, curb plate and two adjacent at least regeneration block concrete sections encloses and establishes the open cavity in top, and the muscle is indulged in the cavity ligature to two adjacent at least regeneration block concrete sections, and the muscle is indulged in the ordinary concrete packing cavity cladding, the length of exempting from to tear open the template section is less than the length of upper portion brick.
Furthermore, indulge the muscle and include first horizontal segment, second horizontal segment and bending segment, the both ends of bending segment are connected with first horizontal segment and second horizontal segment respectively, and first horizontal segment is parallel with the second horizontal segment.
Furthermore, the waste concrete block is a block formed by crushing waste concrete with the strength grade of more than C30.
Further, the common concrete is natural aggregate concrete or recycled aggregate concrete with the strength grade of C20-C30.
Further, the size of the waste concrete block is 60-90 mm, and the substitution rate of the waste concrete block on common concrete is 20-30%.
Furthermore, the cross section of the regenerated block concrete segment is square, and the width of the cross section of the regenerated block concrete segment is the same as the thickness of a wall.
Furthermore, the length, the width and the height of the non-dismantling template segment are the same as the thickness of the wall.
Further, the length of the recycled block concrete segment is 360mm, 420mm, 530mm, 660mm, 720mm, or 830mm.
The manufacturing method of the regenerated block concrete segment comprises the steps of binding the longitudinal bars and the stirrups to form a reinforcement cage, placing the reinforcement cage in a template, placing the waste concrete blocks in the reinforcement cage according to the substitution rate of the waste blocks, pouring common concrete, maintaining and finally forming the regenerated block concrete segment.
According to the construction method of the prefabricated assembled ring beam structure of the regenerated block concrete, the mortar leveling layer is laid on the top of the wall body needing to be provided with the ring beam structure, the regenerated block concrete segments and the disassembly-free template segments are arranged on the mortar leveling layer, the longitudinal ribs extending out of the end faces of the regenerated block concrete segments are bound in the cavity, ordinary concrete is poured in the cavity after binding is completed, and connection of the ring beam structure is completed.
Compared with the prior art, the utility model, following beneficial effect has:
(1) Compare with the full cast-in-place collar tie way of tradition, because the utility model discloses accomplish the back with each segmental prefabrication in mill, just carry out the on-the-spot assembly and pour for installation time has saved the cost of labor.
(2) The method of traditional full cast-in-place gird needs to wait for carrying out building by laying bricks or stones of upper portion brickwork after the concrete has certain intensity. The utility model discloses a length of exempting from to tear open template segment section is less than the length of upper portion brick, and the upper portion brick is directly placed on two adjacent regeneration block concrete segments, and alright carry out building by laying bricks or stones of upper portion wall body after concrete placement accomplishes, need not to wait for the concrete and have certain intensity, can shorten construction cycle.
(3) The segments are prefabricated in factories, the construction effect is good, and the defects of honeycomb pitted surface and the like in cast-in-place are avoided.
(4) The utility model discloses the material uses abandonment block recycled concrete can consume a large amount of building rubbish, and is energy-concerving and environment-protective, simultaneously because the common size in ring beam cross-section is 240mm, so inside can use the diameter size to be 60 ~ 90mm abandonment block recycled concrete as the material, and the substitution rate can reach 20% ~ 30%, consumption building rubbish that can the at utmost, and is energy-concerving and environment-protective.
(5) The utility model discloses a cast in situ concrete regenerates the connection of steel reinforcement cage and abandonment concrete block in the block concrete segment section, and the overlap joint of reinforcing bar satisfies the requirement of anchor length, has guaranteed intensity, atress performance and the stability of structure.
(6) Prefabricated assembled gird structure adopts masonry mortar to bond with the lower part wall body, has concrete and masonry mortar to bond jointly with upper portion wall body, because most brickworks at first take place the mortar joint when the earthquake action and destroy and lead to the structure inefficacy, this prefabricated assembled gird structure that proposes compares than the cast-in-place gird of tradition, does not attenuate to some extent with the joint capability of upper and lower brickworks, and the performance is better.
Drawings
Fig. 1 is a schematic structural diagram of the recycled block concrete segment of the present invention.
Fig. 2 is the utility model discloses a steel reinforcement cage and the configuration drawing of abandonment concrete block.
Fig. 3 is a structural schematic diagram of a U-shaped non-dismantling template segment.
Fig. 4 is an assembly schematic diagram of the recycled block concrete segment and the U-shaped non-dismantling formwork segment.
Fig. 5 is a structural schematic diagram of an L-shaped non-dismantling template segment.
Fig. 6 is an assembly schematic diagram of the recycled block concrete segment and the L-shaped non-dismantling formwork segment.
Fig. 7 is a schematic structural diagram of a cubic non-removable template segment.
Fig. 8 is a schematic view of the assembly of the recycled block concrete segment and the cubic non-removable form segment.
Fig. 9 is a schematic connection diagram of the prefabricated ring beam and the constructional column made of the recycled block concrete.
Figure 10 is a displacement versus load curve for different ring beam configurations.
The concrete-free formwork comprises a regenerated block concrete segment 1, a waste concrete block 11, longitudinal ribs 12, ring beam inner stirrups 13, common concrete 14, a non-dismantling formwork segment 2, a bottom plate 21, side plates 22 and a constructional column 3.
Detailed Description
The present invention will be described in further detail with reference to examples, but the present invention is not limited thereto.
Example 1
As shown in fig. 1 and 3, the present embodiment provides a prefabricated ring beam structure of recycled block concrete, which includes a recycled block concrete segment 1 and a non-dismantling formwork segment 2;
as shown in fig. 1 and 2, the regenerated block concrete segment comprises a waste concrete block 11, longitudinal bars 12, hoops 13 in a ring beam and ordinary concrete 14, the hoops and the longitudinal bars in the ring beam are bound into a reinforcement cage, the waste concrete block is placed in the reinforcement cage, the ordinary concrete covers the waste concrete block and the reinforcement cage, and the two ends of the longitudinal bars extend out of the end face of the regenerated block concrete segment. The manufacturing method of the regenerated block concrete segment comprises the steps of binding the longitudinal bars and the stirrups to form a reinforcement cage, placing the reinforcement cage in a template, placing the waste concrete blocks in the reinforcement cage according to the substitution rate of the waste blocks, pouring common concrete, maintaining and finally forming the regenerated block concrete segment. Wherein, the substitution rate of the waste concrete block to the common concrete is 20-30%, and the size of the waste concrete block is 60-90 mm. The section of the regenerated block concrete segment is square, and the width of the section is the same as the thickness of a wall. In this embodiment, the cross-sectional dimension of the prefabricated ring beam device of the recycled block concrete is 240mm by 240mm, and the total connection length is 4.8m. The segment size of the regenerated concrete block is 240mm 660mm, the substitution rate of the waste concrete block to the common concrete is 25%, and the size of the waste concrete block is 75mm. The length of the longitudinal bars extending out of the end face of the concrete section of the regenerated block is 200mm, and the distance between the stirrups is 200mm.
As shown in FIG. 2, the longitudinal rib comprises a first horizontal segment, a second horizontal segment and a bending segment, wherein two ends of the bending segment are respectively connected with the first horizontal segment and the second horizontal segment, and the first horizontal segment is parallel to the second horizontal segment. The longitudinal bars of two adjacent regenerated block concrete segments are staggered, and binding is convenient.
The waste concrete block is a block formed by crushing waste concrete with the strength grade of more than C30, and the common concrete is natural aggregate concrete with the strength grade of C20-C30.
Exempt from to tear open the template section and include interconnect's bottom plate 21 and curb plate 22, exempt from to tear open the template section and place between two adjacent regeneration block concrete sections, the terminal surface of bottom plate, curb plate and two adjacent at least regeneration block concrete sections encloses and establishes the open cavity in formation top, the muscle of indulging of two adjacent at least regeneration block concrete sections is ligatured in the cavity, ordinary concrete filling cavity cladding indulges the muscle.
The length, the width and the height of the non-dismantling formwork sections are the same as the wall thickness, and the length of the non-dismantling formwork sections is smaller than that of the upper bricks. After the common concrete is poured, the upper brick can be built without waiting for the concrete to have certain strength, and the construction period can be shortened.
In order to accord with various building wall body sizes, make things convenient for the big prefabrication in batches of mill, the utility model discloses the regeneration block concrete segment size modulus of the prefabricated collar tie beam of six specifications has preferentially designed, is 360mm, 420mm, 530mm, 660mm, 720mm, 830mm respectively. Considering that the modulus of the house is 300 in bay and depth, the regenerated block concrete segment is matched with the disassembly-free template segment with the length, width, height and thickness the same as the wall thickness (generally 180, 240 or 370), and then the accurate matching with the wall body can be completed.
When the wall thickness is 180 and the length L of the wall body is odd times of 300, the prefabricated block sections with the modulus of 420mm and 720mm are spliced, so that the matching requirement (n) with the wall body can be met (n) 1 ×(420+180) +1×(720+180)=300×(2n 2 +1));
When the wall thickness is 180 and the length L of the wall body is 300 times of even number, the prefabricated block body sections with the modulus of 420mm are spliced, and the matching requirement (n) with the wall body can be met 1 ×(420+180)=300×2n 2 );
When the wall thickness is 240 and the length L of the wall body is odd times of 300, the modulus is 360mm and 660mThe prefabricated block segments of m are spliced to meet the matching requirement with the wall body (n) 1 ×(360+240) +n 2 ×(660+240)=300×(2n 3 +1));
When the wall thickness is 240 and the length L of the wall body is 300 even times, the prefabricated block body sections with the modulus of 360mm and 660mm are adopted for splicing, so that the matching requirement (n) with the wall body can be met (n) 1 ×(360+240) =300×2n 2 );
For a wall thickness of 370, the wall length L =300n 2 (L > 1500 mm), when n 2 3=0, which can meet the requirement of matching with wall by splicing prefabricated block segments with modulus of 530mm 1 × (530+370)=300n 2 );
For a wall thickness of 370, the wall length L =300n 2 (L > 1500 mm), when n 2 \3=1, which adopts prefabricated block segments with modulus of 530mm and 830mm for splicing and can meet the requirement of matching with a wall (n) 1 ×(530+370)+1×(830+370)=300n 2 );
For a wall thickness of 370, the wall length L =300n2 (L > 1500 mm), when n 2 3=2, which adopts prefabricated block segments with modulus of 530mm and 830mm to splice and can meet the requirement of matching with a wall (n) 1 ×(530+370)+2×(830+370)=300n 2 );
Referring to the specification requirements, the six section size modules can meet all requirements of building wall length meeting 300 modules for walls of 180, 240 and 370 thicknesses. If a design is present in which the building wall length does not conform to a 300 module design, the desired segment size can be customized to the factory.
According to the construction method of the prefabricated assembled ring beam structure of the regenerated block concrete, the mortar leveling layer is laid on the top of the wall body needing to be provided with the ring beam structure, the regenerated block concrete segments and the disassembly-free template segments are arranged on the mortar leveling layer, the longitudinal ribs extending out of the end faces of the regenerated block concrete segments are bound in the cavity, ordinary concrete is poured in the cavity after binding is completed, and connection of the ring beam structure is completed.
The regeneration block concrete segments on the straight wall are connected by the U-shaped non-dismantling template segments, and longitudinal bars extending out of the end faces of the regeneration concrete block segments on the two sides are bound in the cavity. And connecting the regenerated block concrete segments at the corners of the T-shaped wall by adopting L-shaped disassembly-free template segments, and binding longitudinal bars extending out of the end surfaces of the regenerated concrete block segments on the three sides in the cavity. And connecting the regenerated block concrete segments at the corners of the L-shaped wall by adopting cubic disassembly-free template segments, and binding longitudinal bars extending out of the end surfaces of the regenerated concrete block segments at two sides in the cavity.
In this embodiment, the U-shaped detachment-free template segment has an outer cross-sectional dimension of 240mm in length, 240mm in width, and 240mm in height, and a wall thickness of 20mm. The L-shaped non-dismantling template segment has the outer cross section with the length of 240mm, the width of 240mm and the height of 240mm and the wall thickness of 20mm. The external cross-sectional dimension of the cubic non-dismantling template segment is 240mm in length, 240mm in width and 240mm in height, and the wall thickness is 20mm.
FIG. 10 is a displacement-load curve of different ring beam structures, which is respectively 1 common concrete segment prefabricated ring beam (QL-PT-1), 2 recycled concrete segment prefabricated ring beams (QL-ZS-1, QL-ZS-2) and 1 cast-in-place ring beam (QL-XJ). And (4) obtaining a load-deflection curve and a load-strain curve of the test piece through a bending shear test. The result shows that the stress performance of the prefabricated ring beam of the regenerated block concrete is similar to that of a cast-in-place ring beam, the engineering requirements are met, and the prefabricated ring beam can be popularized and applied.
Example 2
As shown in fig. 9, for the connection between the cast-in-place constructional column 3 and the prefabricated ring beam, 4 steel bars extending out of the side of the constructional column by 200mm length are embedded in the connection between the constructional column and the ring beam before pouring. If the constructional column that sets up is prefabricated for the mill, then need pre-buried 4 reinforcing bars that stretch out for 200mm in the block that constructional column and girt are connected in the prefabrication stage. And (3) for the constructional column without embedding the steel bars in advance, planting the steel bars at the joint of the constructional column and the ring beam, and finally binding the steel bars extending out of the side surface of the constructional column and the longitudinal bars of the regenerated block concrete segment in the U-shaped disassembly-free template segment.
As described above, the present invention can be realized well, and the above embodiments are only preferred embodiments of the present invention, and are not intended to limit the scope of the present invention; all equivalent changes and modifications made according to the present invention are intended to be covered by the scope of the claims of the present invention.

Claims (8)

1. A regenerated block concrete prefabricated assembled ring beam structure is characterized by comprising a regenerated block concrete segment and a disassembly-free template segment;
the recycled block concrete segment comprises a waste concrete block body, a longitudinal bar, a hoop bar in a ring beam and common concrete, the hoop bar and the longitudinal bar in the ring beam are bound into a reinforcement cage, the waste concrete block body is placed in the reinforcement cage, the common concrete covers the waste concrete block body and the reinforcement cage, and two ends of the longitudinal bar extend out of the end face of the recycled block concrete segment;
exempt from to tear open the template section and include interconnect's bottom plate and curb plate, exempt from to tear open the template section and place between two adjacent regeneration block concrete sections, the terminal surface of bottom plate, curb plate and two adjacent at least regeneration block concrete sections encloses and establishes the open cavity in top, and the muscle is indulged in the cavity ligature to two adjacent at least regeneration block concrete sections, and the muscle is indulged in the ordinary concrete packing cavity cladding, the length of exempting from to tear open the template section is less than the length of upper portion brick.
2. The prefabricated assembled ring beam structure of recycled block concrete of claim 1, wherein the longitudinal bar comprises a first horizontal section, a second horizontal section and a bending section, two ends of the bending section are respectively connected with the first horizontal section and the second horizontal section, and the first horizontal section is parallel to the second horizontal section.
3. The precast concrete assembled ring beam structure of the recycled block of claim 1, wherein the waste concrete block is a block formed by crushing waste concrete with a strength grade of C30 or more.
4. The prefabricated ring beam structure of recycled block concrete according to claim 1, wherein the common concrete is natural aggregate concrete or recycled aggregate concrete with strength grade of C20-C30.
5. The prefabricated ring beam structure of recycled block concrete as claimed in claim 1, wherein the size of the waste concrete block is 60-90 mm, and the substitution rate of the waste concrete block for the common concrete is 20-30%.
6. The precast concrete assembled ring beam structure of claim 1, wherein the section of the precast concrete segment is square, and the width of the section is the same as the wall thickness.
7. The precast concrete assembled ring beam structure of claim 1, wherein the length, width and height of the demolition-free formwork section are all the same as the wall thickness.
8. The precast concrete assembled ring beam structure of claim 1, wherein the length of the precast concrete segment is 360mm, 420mm, 530mm, 660mm, 720mm, or 830mm.
CN202121270462.7U 2021-06-08 2021-06-08 Prefabricated assembled girt structure of regeneration block concrete Active CN218323488U (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN202121270462.7U CN218323488U (en) 2021-06-08 2021-06-08 Prefabricated assembled girt structure of regeneration block concrete

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN202121270462.7U CN218323488U (en) 2021-06-08 2021-06-08 Prefabricated assembled girt structure of regeneration block concrete

Publications (1)

Publication Number Publication Date
CN218323488U true CN218323488U (en) 2023-01-17

Family

ID=84830301

Family Applications (1)

Application Number Title Priority Date Filing Date
CN202121270462.7U Active CN218323488U (en) 2021-06-08 2021-06-08 Prefabricated assembled girt structure of regeneration block concrete

Country Status (1)

Country Link
CN (1) CN218323488U (en)

Similar Documents

Publication Publication Date Title
CN107165272B (en) Prestressed assembled concrete frame node connecting structure and construction method thereof
CN103397696B (en) Shatter-proof, prefabricated steel bar girder shear wall Temperature Variation In Buildings of Mixed Structures thing
CN103388357B (en) Shatter-proof, prefabricated steel tube shear Temperature Variation In Buildings of Mixed Structures thing
CN104499568A (en) Square steel pipe fabricated column-prefabricated superposed beam integrally-fabricated frame and construction method
CN203475598U (en) Shock-proof prefabricated building of steel bar truss shearing wall composite structure
CN102828468B (en) Construction method for controlling prefabricated crack of high-strength thin-walled box girder under high-temperature dry condition
CN106284846A (en) A kind of assembled steel reinforced concrete-constituted pile and utilize the system of this post, construction method
CN105298040B (en) A kind of lightweight assembled stair and its construction method
CN107700731A (en) A kind of precast assemble floor and construction method
CN110747754A (en) Shear-resisting reinforcing method for oblique section of wide hollow slab
CN110512727B (en) Fabricated building lotus root beam pre-embedded insulation board post-tensioning method anchoring node structure and construction method thereof
CN211113140U (en) Equal cast-in-place assembly type hollow pier system
CN110644662A (en) Prefabricated flat slab composite slab based on stress and splitting method thereof
CN113374171B (en) Recycled block concrete prefabricated assembled ring beam structure and construction method thereof
CN218323488U (en) Prefabricated assembled girt structure of regeneration block concrete
CN216475803U (en) Novel prefabricated floor slab structure applied to shear wall system
CN211286164U (en) Self-compaction regeneration block concrete superimposed shear wall
CN205382595U (en) Integral shear force wall of steel pipe concrete edge constraint coincide
CN211714180U (en) Assembled concrete frame structure
CN1186509C (en) Post-stretching prestressed concrete arch bar roof and its construction method
CN211735010U (en) Assembled earthing corrugated steel plate-prestressed concrete combination arched bridge
CN108716185B (en) Top plate grouting connection prefabricated reinforced concrete side anti-collision guardrail
CN203475599U (en) Shock-proof prefabricated building of steel tube shearing wall composite structure
KR101118508B1 (en) Construction method and structure of anchored slabstone on concrete
KR100717390B1 (en) Assembly precasted panel for excavation tunnel

Legal Events

Date Code Title Description
GR01 Patent grant
GR01 Patent grant