CN118686219A - A rigid tied arch bridge cable hoisting tower foundation structure and construction method thereof - Google Patents
A rigid tied arch bridge cable hoisting tower foundation structure and construction method thereof Download PDFInfo
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- CN118686219A CN118686219A CN202410952161.4A CN202410952161A CN118686219A CN 118686219 A CN118686219 A CN 118686219A CN 202410952161 A CN202410952161 A CN 202410952161A CN 118686219 A CN118686219 A CN 118686219A
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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
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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
- E01D19/16—Suspension cables; Cable clamps for suspension cables ; Pre- or post-stressed cables
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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
- E02D27/10—Deep foundations
- E02D27/12—Pile foundations
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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
- E02D27/50—Anchored foundations
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Abstract
The invention discloses a rigid tied arch bridge cable hoisting tower foundation structure and a construction method thereof, wherein the construction method comprises the following steps: step one, calculating stress of a tower foundation structure, designing the size of the tower foundation structure, and integrally designing foundation concrete of a left tower foundation and a right tower foundation; step two, excavating a foundation pit according to a design form; pouring a pier, and embedding a column positioning steel plate; step four, installing pre-buried upright posts on the upright post positioning steel plates, and welding a positioning framework on the pre-buried upright posts; binding foundation steel bars, reserving balance rope reserved pore channels in the middle of the foundation concrete, and integrally pouring the foundation concrete; and step six, after the foundation concrete is maintained qualified, installing corresponding upright posts, cross joints, diagonal braces and node plates on the pre-buried upright posts and the reserved pore canals of the balance cables. The technology carries out fusion design on the tower foundation and the balance cable anchoring structure, and combines the balance cable anchoring function while meeting the requirement of the tower foundation.
Description
Technical Field
The invention relates to the technical field of arch bridge construction, in particular to a rigid tied arch bridge cable hoisting tower foundation structure and a construction method thereof.
Background
The arch bridge is a bridge which takes an arch as a main bearing member of the structure in a vertical plane, and the steel tube concrete arch bridge has large crossing capacity, strong terrain adaptability and good economy; the simple rigid thin-rod steel tube concrete arch bridge has low geological requirement, less concrete consumption of arch seats and pier stud structures, and smaller span compared with a thrust arch under the same condition, so that the simple rigid thin-rod steel tube concrete arch bridge has lower manufacturing cost and is widely applied in China.
The cable hoisting method is a commonly used bracket-free construction method of arch bridges, and is a method for hoisting prefabricated components into bridges through a cable system. The cable hoisting system comprises the following basic components: main rope, working rope, tower and anchoring device. The working principle of cable hoisting is that towers are erected at two ends of a bridge, cables are connected between the two towers, a slidable pulley is arranged on the cables, the cables are used for bearing hoisting weights and serving as running rails of the pulley, and a hoisting device and a traction device on the cable pulley hoist, transport and install components, so that material transportation and construction of an arch bridge are finally completed, and the defects of long construction period, labor and time consumption of arch bridge construction by a bracket method are avoided.
The tower is used as an important fulcrum and a foundation of a rope hoisting method, and plays a vital role in the stability of the whole rope system. The tower is used as an important fulcrum and a foundation of a rope hoisting method, and plays a vital role in the stability of the whole rope system. The body of the tower adopts steel pole piece to overlap joint to assemble usually, and the body of the tower adopts gate-type or A type structure usually, adopts the node connecting piece to connect between the steel pole piece, and the node connecting piece is atress critical position, and the node connecting piece passes through welding, staple bolt or bolt then is connected with each member on the body of the tower stand.
When the construction of the simple support system rigid thin rod arch bridge adopts a bracket-free construction process, a balance rope is required to be arranged in the main arch rib hoisting process to offset the unbalanced horizontal force of the structure, and after the traditional tower foundation construction is completed, the anchoring structure of the balance rope is required to be rearranged for construction, so that hundreds of thousands of yuan of construction cost is required, and labor and construction period are consumed.
Disclosure of Invention
The invention aims to provide a rigid tied arch bridge cable hoisting tower foundation structure and a construction method thereof, the technology carries out fusion design on the tower foundation and the balance cable anchoring structure, and combines the balance cable anchoring function while meeting the requirement of the tower foundation.
The invention is realized by adopting the following technical scheme:
A rigid tied arch bridge cable hoisting tower foundation structure comprises the following construction steps: step one, calculating stress of a tower foundation structure, designing the size of the tower foundation structure, and integrally designing foundation concrete of a left tower foundation and a right tower foundation.
And step two, excavating a foundation pit according to the design form.
And thirdly, pouring the abutment, and embedding the upright post positioning steel plate.
And fourthly, installing an embedded upright post on the upright post positioning steel plate, and welding a positioning framework on the embedded upright post.
Binding foundation steel bars, reserving balance rope reserved pore channels in the middle of the foundation concrete, and integrally pouring the foundation concrete.
And step six, after the foundation concrete is maintained qualified, installing corresponding upright posts, cross joints, diagonal braces and node plates on the pre-buried upright posts and the reserved pore canals of the balance cables.
The tower foundation adopts pile foundation, enlarges the basis or enlarges basis and adds pile foundation combination form, and tower foundation structure includes left side tower foundation and right side tower foundation, left side tower foundation and right side tower foundation all include pier and basic concrete, the pier setting in basic concrete, the pre-buried stand positioning steel sheet that has on the pier, vertical being connected with pre-buried stand on the stand positioning steel sheet, pre-buried stand's lower extreme is pre-buried in basic concrete, the effect of pier includes stand accurate location and stand bottom atress control. The upper ends of the embedded upright posts are connected with upright posts in sequence through node plates, a transverse link and an inclined strut are connected between the upright posts adjacent to the same side, and foundation concrete of the left tower foundation and foundation concrete of the right tower foundation are formed by connecting and pouring reinforced concrete to form integral foundation concrete. A balance rope anchoring structure is arranged in foundation concrete between the left tower foundation and the right tower foundation, and the balance rope anchoring structure is arranged in the middle of the foundation, so that a space can be reserved for arch bridge hoisting construction. The balance cable anchoring structure comprises a balance cable reserved pore canal, the balance cable passes through the balance cable reserved pore canal and is anchored on the foundation concrete by an anchorage device, and the rear side of the foundation concrete is connected with tensioning equipment for adjusting the cable force of the balance cable; the upright posts are correspondingly additionally arranged on the foundation concrete of the balance cable anchoring structure, a transverse link and an inclined strut are also connected between the adjacent upright posts on the same side, and the upright posts are also connected with node plates with corresponding heights of the left tower foundation and the right tower foundation through the transverse link. The weight upright post and the cross joint are newly added on the foundation concrete of the balance cable anchoring structure, so that the overall stress of the foundation structure is reasonable, and the stress concentration of the foundation is avoided; the weight of the balance cable anchoring structure is pressed by fully utilizing the gravity of the tower and the downward resultant force of the lifting and the inclined pulling buckling of the tower structure, and the consumption of structural concrete can be effectively reduced on the premise of ensuring safety.
Further preferred is: and shear nails for reinforcing connection with the foundation concrete are arranged on the embedded upright posts in the foundation concrete.
Further preferred is: the setting height of the balance rope anchoring structure is higher than the foundation concrete of the left tower foundation and the right tower foundation. The balance cable anchoring structure is arranged in the foundation concrete between the left tower foundation and the right tower foundation and above the ground, so that the balance cable anchoring operation is convenient, and the influence of the balance cable on other construction operations such as main arch rib hoisting and the like is reduced.
Further preferred is: and positioning frameworks are respectively connected between the embedded upright posts of the left tower foundation and the right tower foundation. The positioning framework adopts an angle steel form, is convenient to connect, and saves materials.
The foundation structure of the cable lifting tower of the rigid tied arch bridge and the construction method thereof have the advantages that the balance cable anchoring structure and the foundation of the tower are designed in a fusion mode, the weight of the balance cable anchoring structure is pressed by fully utilizing the gravity of the tower and the downward resultant force of the lifting and the inclined pulling buckling of the tower structure, the consumption of structural concrete can be effectively reduced on the premise of ensuring safety, the construction process is reduced, the construction period is saved, and the foundation structure has good economy; the downward resultant force such as tower gravity, cable-stayed buckle hanging force, main cable force and the like is used as the weight of the balance cable anchoring structure, so that the stability of the multifunctional foundation is greatly improved; and the arrangement positions of the balance cables are optimized, the balance cables are tensioned and anchored in the middle of the foundation of the tower, and the influence of the balance cables on hoisting construction of other structures of the arch bridge is reduced. Meanwhile, compared with other arrangement schemes, the balance cable is more concentrated in arrangement, and the control and adjustment of the balance cable force in construction are facilitated.
Drawings
FIG. 1 is a schematic perspective view of a tower foundation structure;
FIG. 2 is a schematic front view of a tower foundation structure;
FIG. 3 is a schematic top view in partial cross-section of the base concrete of FIG. 2;
FIG. 4 is a side view schematic of FIG. 2;
The names corresponding to the serial numbers in the figures are:
1. A pier; 11. positioning a steel plate by a stand column; 2. pre-burying upright posts; 21. shear nails; 3. positioning a framework; 4. a column; 5. a transverse connection is carried out; 6. diagonal bracing; 7. a gusset plate; 8. a balanced cable anchoring structure; 81. a balancing rope; 82. the balance cable is reserved with a pore canal; 83. an anchor; 84. stretching equipment; 9. and (3) foundation concrete.
Detailed Description
The following description of the embodiments of the present invention will be made more apparent and fully by reference to the accompanying drawings, in which some, but not all embodiments of the invention are shown.
Examples
A tower foundation structure is formed by pile foundation, enlarged foundation or enlarged foundation and pile foundation combination, the tower foundation structure comprises a left tower foundation and a right tower foundation, the left tower foundation and the right tower foundation comprise a pier 1 and foundation concrete 9, the pier 1 is arranged in the foundation concrete 9, a column positioning steel plate 11 is embedded in the pier 1, an embedded column 2 is vertically connected to the column positioning steel plate 11, the lower end of the embedded column 2 is embedded in the foundation concrete 9, and the pier 1 comprises column accurate positioning and column bottom stress control. The upper ends of the embedded upright posts 2 are sequentially connected with upright posts 4 in an lengthening way through a gusset plate 7, a cross joint 5 and an inclined strut 6 are connected between the upright posts 4 adjacent to the same side, and foundation concrete 9 of the left tower foundation and the right tower foundation is formed by connecting and pouring reinforced concrete to form integral foundation concrete, and the left tower foundation and the right tower foundation are integrally designed and used as an integral body, so that the stability of the foundation can be improved. The balance cable anchoring structure 8 is arranged in the foundation concrete 9 between the left tower foundation and the right tower foundation, and the balance cable anchoring structure 8 is arranged in the middle of the foundation, so that a space can be reserved for arch bridge hoisting construction. The balance cable anchoring structure 8 comprises a balance cable reserved pore 82, wherein the balance cable 81 passes through the balance cable reserved pore 82 and is anchored on the foundation concrete 9 by an anchorage 83, and a tensioning device 84 for adjusting the cable force of the balance cable 81 is connected to the rear side of the foundation concrete 9; the upright posts 4 are correspondingly additionally arranged on the foundation concrete 9 of the balance cable anchoring structure 8, a cross joint 5 and an inclined strut 6 are also connected between the upright posts 4 adjacent to the same side, and the upright posts 4 are also connected with the node plates 7 with corresponding heights of the left tower foundation and the right tower foundation through the cross joint 5. The weight upright posts and the cross joints are newly added on the foundation concrete 9 of the balance cable anchoring structure 8, so that the overall stress of the foundation structure is reasonable, and the stress concentration of the foundation is avoided; the weight of the balance cable anchoring structure is pressed by fully utilizing the gravity of the tower and the downward resultant force of the lifting and the inclined pulling buckling of the tower structure, and the consumption of structural concrete can be effectively reduced on the premise of ensuring safety.
The embedded upright post 2 in the foundation concrete 9 is provided with a shear pin 21 for reinforcing connection with the foundation concrete 9.
The balance cable anchoring structure 8 is arranged at a height higher than the foundation concrete 9 of the left tower foundation and the right tower foundation. The balance cable anchoring structure 8 is arranged in the foundation concrete 9 between the left tower foundation and the right tower foundation and above the ground, so that the balance cable anchoring operation is convenient, and the influence of the balance cable on other construction operations such as main arch rib hoisting and the like is reduced.
And positioning frameworks 3 are respectively connected between the embedded upright posts 2 of the left tower foundation and the right tower foundation. The positioning framework 3 adopts an angle steel form, is convenient to connect, and saves materials.
The construction steps of the foundation structure of the rigid tied arch bridge cable hoisting tower are as follows: step one, calculating stress of a tower foundation structure, designing the size of the tower foundation structure, and integrally designing foundation concrete of a left tower foundation and a right tower foundation;
step two, excavating a foundation pit according to a design form;
pouring the abutment 1, and embedding an upright post positioning steel plate 11;
step four, installing an embedded upright post 2 on an upright post positioning steel plate 11, and welding a positioning framework 3 on the embedded upright post 2;
Binding foundation steel bars, reserving balance cable reserved pore canals 82 in the middle of the foundation concrete 9, and integrally pouring the foundation concrete 9;
and step six, after the foundation concrete 9 is maintained qualified, installing corresponding upright posts 4, cross members 5, diagonal braces 6 and gusset plates 7 on the pre-buried upright posts 2 and the balance cable reserved holes 82.
When the size form of the tower foundation structure is designed, the bearing capacity, the internal force and the structural stability of the multifunctional foundation are required to be calculated, wherein in the calculation of the stability of the tower foundation structure, the anti-sliding, anti-overturning and anti-stretching calculation are required to be performed; taking an enlarged foundation as an example, when in calculation and analysis, the influence of the self weight of the foundation, soil pressure, friction force, tower self weight, main cable force and cable-stayed buckling cable force on the foundation is considered, and the least favorable working condition can be selected for analysis in the calculation process, and the foundation size is optimized; the tower foundation structure has high pressure, so that the foundation concrete volume can be greatly reduced; the foundation is enlarged, the geological requirement is higher, the drainage is paid attention to in the foundation pit slope-releasing excavation process, and broken stones need to be replaced in the foundation under the poor geological environment; the abutment 1 is shaped mainly for convenient formwork erection and can be round or square. Pre-embedding a column positioning steel plate 11 on the top of a pier during pouring, wherein the column positioning steel plate 11 mainly has the functions of accurately positioning and avoiding stress concentration; the foundation concrete pouring belongs to mass concrete pouring, and in order to avoid concrete cracks, a layered pouring construction process can be adopted.
When the size form of the tower foundation structure is designed, multifunctional foundation base counter force calculation, foundation bearing capacity checking calculation, foundation base plate bending resistance calculation, foundation base plate positive and negative bending resistance rib selection, foundation base plate shearing resistance checking calculation, foundation base plate impact resistance cutting checking calculation, partial pressure checking calculation and foundation structure stability calculation are required, wherein in the tower foundation structure stability calculation, sliding resistance, overturning resistance and pulling resistance calculation are required.
Considering the influence of the dead weight of the tower, the cable force of the main cable, the cable buckling force, the wind load and the like on the tower column bases, simulating the stress state of the tower in the cable hoisting construction stage through finite element software, and extracting the axial force N, the longitudinal bridge bending moment Mx and the transverse bridge bending moment My born by each tower column base under the worst condition. Meanwhile, in the arch bridge cable hoisting construction, the horizontal thrust of the arch foot needs to be controlled and regulated by the cable force of the balance cable, and the calculation of the tower foundation needs to consider the resultant force of the balance cable pulled by the balance cable anchoring structure. When the size form of the tower foundation structure is designed, the multifunctional foundation base counter force calculation, foundation bearing capacity checking calculation, foundation slab bending resistance rib selection, foundation slab shearing resistance checking calculation, foundation slab impact resistance cutting checking calculation, partial pressure checking calculation and foundation structure stability calculation are required to be carried out, wherein in the tower foundation structure stability calculation, the anti-sliding, anti-overturning and anti-pulling calculation is required to be carried out;
Assuming that the substrate counter force is distributed in a straight line, no tensile stress occurs on the substrate, and the calculation formula of the average substrate pressure under the standard load is as follows:
The formula of calculating the maximum pressure of the substrate is as follows:
the formula for calculating the minimum pressure of the substrate is as follows:
Wherein:
the load of the column of the embedded section of the tower foundation is converted into the equivalent load at the centroid of the bottom surface of the foundation:
Wherein:
The tower foundation needs to carry out foundation bearing capacity checking calculation, the bearing capacity checking calculation pressure is combined with load effect standard, and the foundation bearing capacity checking calculation meets the following formula, namely the foundation bearing capacity checking calculation passes:
Wherein:
And selecting sections at the junctions of all the upright posts and the tower foundation to calculate bending moment. The calculated cross section is divided into two types: and calculating the sections perpendicular to the x axis and the y axis, and respectively selecting the maximum bending moment value as bending resistance reinforcing bars to calculate the bending moment. Selecting a section perpendicular to the coordinate axis at the joint of the upright post and the foundation slab, and cutting off a bending moment value of the calculated section of the isolator. Considering the cut portion as a cantilever beam that receives a base reaction force and a concentrated load (load transmitted by the column), a bending moment at the cross section can be obtained. And reinforcing the foundation slab according to the obtained bending moment value, wherein the minimum reinforcing rate of the reinforced bars for expanding the foundation is not less than 0.15%.
In tower foundation shear test calculation, the following calculation formula should be satisfied:
Wherein:
In the punching checking calculation of tower foundation resistance, punching checking calculation is respectively carried out on all four side surfaces of the joint of the upright post and the foundation slab according to the checking calculation of the single-side section of the destroyed cone:
Wherein:
in tower foundation partial pressure checking, the following calculation formula should be satisfied:
Wherein:
For tower foundation structure stability calculation, the tower gravity G, the tower weight anti-overturning moment M g and the tower balance cable force resultant force are known And the tower balance cable force overturning moment arm b, the balance cable horizontal included angle alpha and the tower base friction force f are required to be calculated by anti-sliding and anti-overturning and anti-pulling safety coefficients.
The expression of passive earth pressure intensity P p at any point at depth z is:
Wherein gamma is the rock-soil weight, K p is the passive soil pressure coefficient, which is the internal friction angle of the rock soil.
The resultant of the passive earth pressure forces in cross section is (safety considerations, taken at the high H/3 of the tower foundation):
The resultant force action position passes through the gravity center of the trapezoid area, and the total passive soil pressure P Total (S) ：
Soil body anti-overturning moment M 0:
Tower foundation horizontal resistance p=f+p Total (S) , total balance cable horizontal cable force Anti-slip safety factor K 1＝P/ FH＞[K1 ] =2.0; anti-overturning moment M=M g+M0, horizontal tension resultant force overturning momentAnti-capsizing safety coefficient K 2＝M/ Mt=2.72 ＞[K2 ] =2.0; vertical cable force of total balance cableThe pull-out safety coefficient is K 3＝G/FV＞[K3 ] =2.0.
When the calculation result shows that the anti-sliding safety coefficient, the anti-overturning safety coefficient and the anti-pulling safety coefficient are all larger than 2, the stability of the tower foundation meets the requirement.
The above description is not intended to limit the invention to the particular embodiments disclosed, but to limit the invention to the particular embodiments disclosed, as many variations, modifications, additions and substitutions are possible, without departing from the scope of the invention as disclosed in the accompanying claims.
Claims (5)
1. The utility model provides a rigidity tie rod arch bridge cable hoist and mount pylon foundation structure, includes left side frame tower foundation and right side frame tower foundation, left side frame tower foundation and right side frame tower foundation all include pier (1) and basis concrete (9), pier (1) set up in basis concrete (9), pre-buried on pier (1) have stand location steel sheet (11), vertical on stand location steel sheet (11) be connected with pre-buried stand (2), pre-buried stand (2) lower extreme is pre-buried in basis concrete (9), pre-buried stand (2) upper end is connected with stand (4) through gusset (7) extension in proper order, be connected with cross-section (5) and bracing (6) between adjacent stand (4) of same side, its characterized in that: the left tower foundation and the right tower foundation are formed by pouring reinforced concrete into a whole foundation concrete, a balance cable anchoring structure (8) is arranged in the foundation concrete (9) between the left tower foundation and the right tower foundation, the balance cable anchoring structure (8) comprises a balance cable reserved pore channel (82), a balance cable (81) penetrates through the balance cable reserved pore channel (82) and is anchored on the foundation concrete (9) by an anchor (83), and tensioning equipment (84) for adjusting the cable force of the balance cable (81) is connected to the rear side of the foundation concrete (9); and upright posts (4) are correspondingly additionally arranged on foundation concrete (9) of the balance cable anchoring structure (8), a cross joint (5) and inclined struts (6) are also connected between the adjacent upright posts (4) on the same side, and the upright posts (4) are also connected with node plates (7) with corresponding heights of the left tower foundation and the right tower foundation through the cross joint (5).
2. A rigid tied-arch bridge cable-hoisting tower foundation structure according to claim 1, wherein: the shear nails (21) used for reinforcing connection with the foundation concrete (9) are arranged on the embedded upright posts (2) in the foundation concrete (9).
3. A rigid tied-arch bridge cable-hoisting tower foundation structure according to claim 1, wherein: the setting height of the balance cable anchoring structure (8) is higher than the foundation concrete (9) of the left-width tower foundation and the right-width tower foundation.
4. A rigid tied-arch bridge cable-hoisting tower foundation structure according to claim 1, wherein: and positioning frameworks (3) are respectively connected between the embedded upright posts (2) of the left tower foundation and the right tower foundation.
5. A rigid tied-arch bridge cable-hoisting tower foundation structure according to claim 1, wherein: the construction method of the rigid tied arch bridge cable hoisting tower foundation structure comprises the following steps:
step one, calculating stress of a tower foundation structure, designing the size of the tower foundation structure, and integrally designing foundation concrete of a left tower foundation and a right tower foundation;
step two, excavating a foundation pit according to a design form;
pouring the abutment (1), and embedding an upright post positioning steel plate (11);
step four, installing an embedded upright post (2) on an upright post positioning steel plate (11), and welding a positioning framework (3) on the embedded upright post (2);
Binding foundation steel bars, reserving balance cable reserved pore channels (82) in the middle of the foundation concrete (9), and integrally pouring the foundation concrete (9);
step six, after the foundation concrete (9) is maintained qualified, installing corresponding upright posts (4), cross joints (5), diagonal braces (6) and node plates (7) on the pre-buried upright posts (2) and the balance rope reserved pore channels (82).
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN119939951A (en) * | 2025-02-24 | 2025-05-06 | 中国建筑第六工程局有限公司 | A calculation method for the force of a primary tensioned inclined cable based on the influence matrix method |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN119939951A (en) * | 2025-02-24 | 2025-05-06 | 中国建筑第六工程局有限公司 | A calculation method for the force of a primary tensioned inclined cable based on the influence matrix method |
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Effective date of registration: 20260129 Address after: No.530001, xingyong Road, Nanning, Guangxi Zhuang Autonomous Region Applicant after: GUANGXI ROAD CONSTRUCTION ENGINEERING GROUP Co.,Ltd. Country or region after: China Applicant after: Guangxi Beitou Traffic Maintenance Technology Group Co.,Ltd. Address before: No.530001, xingyong Road, Nanning, Guangxi Zhuang Autonomous Region Applicant before: GUANGXI ROAD CONSTRUCTION ENGINEERING GROUP Co.,Ltd. Country or region before: China |