CN111794119A - Temporary support system and hoisting method for basket type steel box tied arch - Google Patents

Abstract

The application relates to a temporary support system and a hoisting method for a tied arch of a basket-type steel box, wherein the tied arch of the basket-type steel box consists of a large arch rib section and main arch sections positioned at two ends of the large arch rib section; the arch rib large section is formed by splicing a first arch rib section, a second arch rib section and a vault closure section; the temporary support system is used for temporarily supporting the basket type steel box tie rod arch in the construction processes of assembling, transporting, hoisting and the like of the basket type steel box tie rod arch, and comprises the following components: a rib support including a horizontal support bar and a vertical support unit. The temporary supporting system and the hoisting method can effectively control the deformation of the large-segment arch rib in the processes of splicing, transportation and integral one-time hoisting, improve the closure precision and the assembly efficiency, save the construction time, and have remarkable social benefit and economic benefit.

Description

Temporary support system and hoisting method for basket type steel box tied arch

Technical Field

The invention relates to the technical field of bridge construction, in particular to a lifting basket type temporary support system for a steel box tied arch and a lifting method.

Background

At present, the method for installing the tie rod arch of the steel box at home and abroad comprises the following steps: hoisting a cable without a bracket; hoisting the cable with few brackets; hoisting the whole arch rib or few supports by a floating crane; hoisting a suspension bridge type cable; constructing a swivel; assembling on a bracket; the jack is obliquely pulled, buckled, hung and spliced, and the like. The construction equipment comprises a cable crane tower frame, a cable crane main rope, a hoisting rope, a traction rope, a buckling rope and the like, the requirement on the construction equipment is high, a support needs to be erected in the hoisting process, the geological condition under the bridge is required to be good, the foundation bearing capacity is high, and the river course closure is required during the period from erection of the support to detachment of the support; the rotating device and the traction device for rotating construction are time-consuming and labor-consuming, the reasonable cable buckling force is difficult to determine, and the rotating stage structure is easy to be unstable integrally; the buckling tower of the inclined pull buckling hanging assembly method has complex stress, the buckling cable adopts a steel wire rope, and the defects of difficult control of inelastic deformation, long construction period of the buckling tower, more nodes and difficult control of installation quality exist.

The problems can be solved by adopting the whole arch rib hoisting method, but the requirements on hoisting equipment and water navigation capability are higher, the line shape of a single arch rib during the hoisting process is difficult to accurately control, and the arch rib has the risk of distortion and deformation which cannot be repaired.

Disclosure of Invention

The embodiment of the invention provides a temporary support system and a hoisting method for a basket type steel box tied arch, which effectively control the deformation of a large-section arch rib in the processes of splicing, transportation and integral one-time hoisting through the temporary support system, improve the closure precision and the assembly efficiency, save the construction time and have remarkable social and economic benefits.

In a first aspect, a temporary support system for a tied arch of a basket-type steel box is provided, which is used for temporarily supporting the tied arch of the basket-type steel box in the construction processes of assembling, transporting, hoisting and the like, and comprises:

the arch rib support comprises a horizontal support rod and a vertical support unit;

the lifting basket type steel box tie rod arch is composed of a large arch rib section and main arch sections positioned at two ends of the large arch rib section; the arch rib large section is formed by splicing a vault closure section, a first arch rib section and a second arch rib section which are respectively arranged at two ends of the vault closure section;

the horizontal support rod is arranged horizontally, and the lower end of the vertical support unit is fixed on the horizontal support rod and is arranged vertically to the horizontal support rod;

in a use state, two ends of the horizontal supporting rod are respectively connected with the first arch rib section and the second arch rib section, and the upper end of the vertical supporting unit is connected with the arch crown closure section.

In some embodiments, the first rib section is structurally identical to the second rib section;

the vertical supporting unit comprises a first supporting unit and a second supporting unit which have the same structure;

the first supporting unit and the second supporting unit respectively form a triangular structure with the horizontal supporting rod and are symmetrically distributed on two sides of the central point of the horizontal supporting rod;

in the using state, the vertex of the triangular structure is connected with the vault closure section.

In some embodiments, the temporary brace system for a tied arch of a basket-type steel box further comprises a first support fixing column and a second support fixing column which are identical in structure; in the use state:

the top end of the first supporting and fixing column is fixed at the joint of the first arch rib section and the vault folding section;

the top end of the second supporting and fixing column is fixed at the joint of the second arch rib section and the vault closure section;

the bottom ends of the first supporting and fixing column and the second supporting and fixing column are fixed on the transport ship.

In some embodiments, the first supporting and fixing column comprises a first upright and a second upright arranged in a vertical manner; in the use state:

the bottom ends of the first upright post and the second upright post are fixed on a transport ship;

the top ends of the first upright post and the second upright post are symmetrically arranged at two sides of the joint of the first arch rib section and the arch crown closure section;

the first upright post is fixed with the first arch rib section, and the second upright post is fixed with the vault closure section.

In some embodiments, a connection means is provided between the first and second uprights 402;

the connecting device comprises a plurality of support rods connected between the first upright and the second upright.

In a second aspect, a method for hoisting a tied arch of a basket-type steel box is provided, the method being based on the above temporary support system for tied arches of a basket-type steel box, and the method includes:

manufacturing an arch rib support, a first support fixing column and a second support fixing column;

assembling a large arch rib segment on the arch rib support;

transporting the large arch rib section with the arch rib support to a hoisting place;

integrally hoisting the large arch rib segment with the arch rib support;

and removing the arch rib support.

In some embodiments, before integrally hoisting the large segment of the arch rib with the arch rib support, the method further comprises:

installing a first main arch support and a second main arch support;

hoisting the main arch segment;

the first and second main arch supports are used to temporarily support the main arch segments.

In some embodiments, the large arch rib segment is composed of a first arch rib segment, a second arch rib segment and a vault closure segment;

in the process of assembling a large segment of a rib on the rib support:

monitoring and feeding back hoisting data information of the large arch rib segment;

carrying out simulated hoisting alignment analysis on the large arch rib sections;

and adjusting the splicing of the first arch rib section, the second arch rib section and the vault closure section according to the hoisting data information and/or the simulated hoisting alignment analysis.

In some embodiments, before transporting the large section of the arch rib with the arch rib support, mounting a first supporting and fixing column and a second supporting and fixing column on the large section of the arch rib with the arch rib support;

and after the large arch rib section with the arch rib support reaches a hoisting place, the connection between the large arch rib section with the arch rib support and the first support fixing column and the second support fixing column is released.

In some embodiments, the hoist data information comprises:

the corner point space coordinates of the butt joint surface of the large arch rib segment and the main arch segment;

temperature conditions during the hoisting process.

The technical scheme provided by the invention has the beneficial effects that:

the embodiment of the invention provides a temporary support system and a hoisting method for a basket type steel box tied arch, which are used for controlling large deformation in the vertical direction, the longitudinal direction and the transverse direction in the construction process of the basket type steel box tied arch, improving closure precision and assembly efficiency in the hoisting construction process of the basket type steel box tied arch, saving construction time and having remarkable social benefit and economic benefit.

Drawings

In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings needed to be used in the description of the embodiments will be briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings based on these drawings without creative efforts.

FIG. 1 is a schematic structural view of a support assembly for lifting a basket-type steel box tie-bar arch according to an embodiment of the present invention;

FIG. 2 is a schematic structural diagram of a support assembly of the basket-type steel box in tie-bar arch assembly according to the embodiment of the present invention;

FIG. 3 is a schematic view of a first supporting and fixing column of the temporary support system for the steel case tie bar of the basket type according to the embodiment of the present invention;

FIG. 4 is a schematic structural view of a support assembly of the main arch structure according to an embodiment of the present invention;

FIG. 5 is a schematic view of a support structure of a three-way jack in a construction process of a basket-type steel box tie-rod arch according to an embodiment of the present invention;

FIG. 6 is a schematic structural view of a support assembly of the present invention during transportation of a steel-box tied arch;

FIG. 7 is a schematic structural diagram of a basket-type steel box tie arch according to an embodiment of the present invention during hoisting;

FIG. 8 is a schematic structural diagram of a basket-type steel box tie arch construction according to an embodiment of the present invention after completion of step ST 1;

FIG. 9 is a schematic structural diagram of a basket-type steel box tie arch construction according to an embodiment of the present invention after completion of step ST 2;

FIG. 10 is a schematic structural diagram of a basket-type steel box tie arch construction of the present invention after completion of step ST 3;

FIG. 11 is a schematic structural view of a basket-type steel box tie arch construction in the process of step ST4 according to an embodiment of the present invention;

FIG. 12 is a schematic structural view of a basket-type steel box tie arch construction step ST5 according to an embodiment of the present invention;

FIG. 13 is a schematic structural view of a basket-type steel box tie arch construction in the process of step ST6 according to an embodiment of the present invention;

FIG. 14 is a schematic structural diagram of a basket-type steel box tie arch construction of the present invention after completion of step ST 7;

FIG. 15 is a schematic structural diagram of a basket-type steel box tie arch construction of the present invention after completion of step ST 8;

FIG. 16 is a schematic structural diagram of a basket-type steel box tie arch construction of the present invention after completion of step ST 9;

FIG. 17 is a schematic structural diagram of a basket-type steel box tie arch construction of the present invention after completion of step ST 10;

FIG. 18 is a schematic structural diagram of a basket-type steel box tie arch construction of the present invention after completion of step ST 11;

FIG. 19 is a schematic structural diagram of a basket-type steel box tie arch construction of the present invention after completion of step ST 12;

description of reference numerals:

1. a large segment of an arch rib; 101. a vault closure section; 102. a first rib segment; 103. a second rib segment; 2. supporting the arch rib; 201. a horizontal support bar; 202. a first supporting unit; 202a, a tilt support rod; 202b, vertical support bars; 203. a second supporting unit; 3. a lifting rope; 4. a first supporting and fixing column; 401. a first upright post; 401a, a first connecting plate; 402. a second upright post; 402a, a second connecting plate; 403. a transverse stay bar; 404. a diagonal brace; 5. the second supporting and fixing column; 6. vertically supporting; 7. a first main arch support; 8. a second main arch support; 9. connecting and supporting; 901. an inclined connecting rod; 902. a horizontal connecting rod; 10. a jacking device; 1001. a three-way jack; 1002. a lifting seat; 11. a carrier vessel; 12. a bridge pier; 13. a main arch segment; 14. transition piers; 15. an arch foot pre-embedding section; 16. anti-collision piers; 18. an arch support; 19. an edge arch; 20. floating; 21. a temporary tie bar; 22. a boom; 23. a main beam section; 24. a bridge deck crane.

Detailed Description

In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all, embodiments of the present invention. All other embodiments, which can be obtained by a person skilled in the art without any inventive step based on the embodiments of the present invention, are within the scope of the present invention.

The embodiment of the invention provides a temporary support system for a tied arch of a basket type steel box, which can control large deformation generated in the vertical direction, the longitudinal direction and the transverse direction in the construction process of the tied arch of the basket type steel box, improve the closure precision and the assembly efficiency of the tied arch of the basket type steel box, save the construction time and have remarkable social benefit and economic benefit.

As shown in fig. 2 and 13, the rib segment 1 is provided in an arch shape and divided into three segments. The arch rib large section 1 is formed by splicing a vault closure section 101, a first arch rib section 102 and a second arch rib section 103 which are respectively arranged at two ends of the vault closure section 101. When temporary support is needed, a rib support 2 is connected to the rib large section 1, and the rib support 2 comprises a horizontal support rod 201 and a vertical support unit. The large arch rib section 1 is supported by the arch rib support 2, so that the large arch rib section 1 is prevented from being deformed too much due to large stress deviation when the large arch rib section 1 is welded or hoisted.

As shown in fig. 2, the horizontal support rod 201 is horizontally disposed, and the lower end of the vertical support unit is fixed to the horizontal support rod 201 and vertically disposed therewith; in the use state, two ends of the horizontal support rod 201 are respectively connected with the first arch rib section 102 and the second arch rib section 103, and the upper end of the vertical support unit is connected with the vault closure section 101.

As shown in fig. 13, the basket type steel box tie arch is formed by splicing a large arch rib segment 1 and main arch segments 13 positioned at two ends of the large arch rib segment 1.

As an embodiment of the present invention, as shown in fig. 6 and 13, the first rib segment 102 and the second rib segment 103 have the same structure and are symmetrically disposed at both ends of the dome closure segment 101. The first arch rib section 102 and the second arch rib section 103 are symmetrically arranged on two sides of the vault closure section 101, so that the arch rib support 2 can symmetrically support the arch rib large section 1.

As shown in fig. 6, the vertical support unit includes a first support unit 202 and a second support unit 203 having the same structure. The first supporting unit 202 and the second supporting unit 203 form a triangular structure with the horizontal supporting rod 201, and are symmetrically distributed on two sides of the central point of the horizontal supporting rod 201. In the use position, the apex of the triangular structure is connected to the dome closure 101. The vertical supporting units provide further supporting limit for the arch top closure segment 101, the first arch rib segment 102 and the second arch rib segment 103, and can further reduce the deviation of the arch rib large segment 1 during welding or hoisting.

As a preferred embodiment of the present invention, as shown in fig. 1, the first supporting unit 202 includes two inclined supporting rods 202a and a vertical supporting rod 202b, the vertical supporting rod 202b is disposed perpendicular to the horizontal supporting rod 201, and the two inclined supporting rods 202a are disposed symmetrically along the vertical supporting rod 202 b.

As shown in fig. 1, the vertical support bar 202b of the first support unit 202 is disposed at the connection of the first rib section 102 and the dome closure section 101, and the upper ends of the two inclined support bars 202a are connected to the vertical support bar 202 b.

The arrangement structure of the first supporting unit 202 ensures the supporting and limiting reliability of the arch rib support 2, and further reduces the deviation between the large arch rib section 1 and the first arch rib section 102 during welding or hoisting.

As a preferred embodiment of the present invention, as shown in fig. 2, the temporary supporting system further includes a first supporting and fixing column 4 and a second supporting and fixing column 5 which have the same structure. In the use state: the top end of the first supporting and fixing column 4 is fixed at the joint of the first arch rib section 102 and the vault closure section 101, the top end of the second supporting and fixing column 5 is fixed at the joint of the second arch rib section 103 and the vault closure section 101, and the bottom ends of the first supporting and fixing column 4 and the second supporting and fixing column 5 are fixed on the transport ship 11. Preferably, the temporary support system further comprises a plurality of vertical ground supports 6, and the upper ends of the vertical ground supports 6 are fixed to the horizontal support rods 201 and the lower ends are fixed to the carrier 11 in the use state to play a role of auxiliary support.

After the arch crown closure section 101, the first arch rib section 102, the second arch rib section 103 and other arch rib sections of the large arch rib section 1 are installed on the outer side of a channel of a construction site, when the large arch rib section 1 is integrally hung on a transport ship 11, the stability of the large arch rib section 1 fixed on the transport ship 11 is ensured through the arranged first supporting and fixing column 4 and the second supporting and fixing column 5, and the large arch rib section 1 is prevented from being lifted to the transport ship 11 or being deformed in the transport process of the transport ship 11.

As an embodiment of the present invention, as shown in fig. 3, the first supporting and fixing column 4 includes a first upright column 401 and a second upright column 402 arranged in a vertical shape. In the use state: the bottom ends of the first upright column 401 and the second upright column 402 are fixed on the transport ship 11, the top ends of the first upright column 401 and the second upright column 402 are symmetrically arranged at two sides of the joint of the first rib section 102 and the vault closure section 101, the first upright column 401 is fixed with the first rib section 102, and the second upright column 402 is fixed with the vault closure section 101.

This setting has further guaranteed that braced system supports spacing reliability to the big festival section 1 of arch rib, avoids the big festival section 1 of arch rib to transport and assemble, great displacement deviation appears in the hoist and mount in-process, and the big festival section 1 of arch rib transports to the erection site back through transport ship 11, when the big festival section 1 of hoist arch rib is installed, remains the arch rib and supports 2 for the big festival section 1 of arch rib breaks away from with first support fixed column 4, second support fixed column 5.

As a preferred embodiment of the present invention, as shown in fig. 3, a first connecting plate 401a is provided at the lower end of the first upright column 401, and a second connecting plate 402a is provided at the lower end of the second upright column 402, and the first connecting plate 401a and the second connecting plate 402a are used for the fixed connection of the first support fixing column 4.

The first support fixing column 4 is fixed to the carrier ship 11 by providing bolt coupling holes in the first and second coupling plates 401a and 402a and then coupling bolts.

As a preferred embodiment of the present invention, as shown in fig. 3, the elevation of the upper end of the second upright column 402 is higher than the elevation of the upper end of the first upright column 401, and the jacking devices 10 are disposed at the upper ends of the first upright column 401 and the second upright column 402.

This arrangement facilitates the support adjustment of the first support fixing column 4 to the arch rib large section 1, and can be adjusted and limited by the jacking device 10.

As a preferred embodiment of the present invention, as shown in fig. 3, a brace device is disposed between the first upright 401 and the second upright 402, and the brace device is used for supporting and connecting the first upright 401 and the second upright 402. The integrity and the stability of the supporting and limiting of the first supporting and fixing column 4 to the arch rib large section 1 are ensured.

As a preferred embodiment of the present invention, as shown in fig. 3, the brace apparatus includes two or more brace bars 403 and 404, the brace bars 403 and 404 are disposed at intervals, the two brace bars 404 on both sides of the brace bar 403 are symmetrically disposed along a transverse center line of the brace bar 403, and the brace bar 403 is disposed perpendicular to the first vertical column 401 and the second vertical column 402.

This setting has guaranteed stability and the reliability of being connected between second stand 402 and the first stand 401 of first support fixed column 4, has further improved first support fixed column 4 and has supported spacing wholeness to the big section 1 of arch rib.

As a preferred embodiment of the present invention, as shown in fig. 5, the jacking device 10 includes a three-way jack 1001, a lifting seat 1002 is provided at an upper end of the three-way jack 1001, and an upper contact surface of the lifting seat 1002 is disposed obliquely. This setting sets up the last contact surface that promotes seat 1002 into the inclined plane, and the reliability and the precision that the jacking device 10 adjusted the support to the big festival section 1 of arch rib of being convenient for to set up the gasket on the last contact surface that promotes seat 1002, stability when further guaranteeing jacking device 10 and adjusting.

As a preferred embodiment of the present invention, as shown in fig. 4 and 13, main arch segments 13 are provided at both ends of a large arch rib segment 1, one end of each main arch segment 13 is connected to a bridge pier 12, the other end of each main arch segment 13 is connected to the large arch rib segment 1, a first main arch support 7 and a second main arch support 8 are provided below the main arch segment 13, a connection support 9 is provided between the first main arch support 7 and the second main arch support 8, and the lower ends of the first main arch support 7 and the second main arch support 8 are fixedly connected to a river bed.

Preferably, as shown in fig. 4, the jacking devices 10 are respectively arranged at the upper ends of the first main arch support 7 and the second main arch support 8, the first main arch support 7 is formed by connecting two equal-height steel pipe columns, the top ends of the two steel pipe columns are provided with connecting cross beams, and the jacking devices 10 are detachably fixed on the connecting cross beams to complete the supporting and limiting of the first main arch support 7 on the main arch section 13.

Preferably, as shown in fig. 4, the second main arch support 8 is provided at a position where the main arch section 13 is coupled to the rib large section 1, and the support structure of the second main arch support 8 is the same as or similar to that of the first support fixing post 4. This arrangement facilitates versatility and reliability of the support system in supporting and adjusting the main arch segments 13.

Preferably, as shown in fig. 4, the connecting support 9 includes an inclined connecting rod 901 and a horizontal connecting rod 902, the horizontal connecting rod 902 is horizontally disposed, and two or more inclined connecting rods 901 and two or more horizontal connecting rods 902 are disposed. This arrangement further ensures the stability of the connection of the first and second main arch brackets 7 and 8, so that the first and second main arch brackets 7 and 8 can support and adjust the integrity of the main arch section 13.

As a preferred embodiment of the present invention, as shown in fig. 7, the basket type steel box tie arch comprises two arch rib large sections 1, wherein the two arch rib large sections 1 are both provided with arch rib supports 2, the horizontal support rods 201 on the two arch rib large sections 1 are on the same horizontal plane, and the two horizontal support rods 201 are fixedly connected through a connecting rod. When the lifting basket type steel box tied arch is hoisted, the arch rib support 2 is fixed on the arch rib large section 1, the hoisting installation of the lifting basket type steel box tied arch is completed through the four lifting ropes 3, and after the arch rib large section 1 and the main arch section 13 are connected and positioned, the arch rib support 2, the first main arch support 7 and the second main arch support 8 are detached.

According to the embodiment of the invention, the support system of the tied arch of the basket type steel box during assembling, transporting and hoisting is completed by arranging the arch rib support 2, the first support fixing column 4, the second support fixing column 5, the first main arch support 7 and the second main arch support 8, so that the condition that the tied arch of the basket type steel box generates larger deformation in the vertical direction, the longitudinal direction and the transverse direction in the construction process, the folding and the assembling of the tied arch of the basket type steel box are influenced, the assembling efficiency is improved, the construction time is saved, the assembling precision is ensured, and remarkable social benefits and economic benefits are achieved.

The embodiment of the invention also provides a lifting basket type steel box tied arch hoisting method, the steel box tied arch is divided into sections reasonably, the arch rib and the wind bracing which correspond to the channel position are taken as a large section, the whole large section is processed, pre-spliced and pre-arched, the large section is installed at one time through a large floating crane, the construction progress is accelerated by reasonably arranging the prefabrication and splicing procedures, and the construction period is shortened; and the assembly times and the welding amount on site are effectively reduced, and the large-scale floating crane and the transport ship are hoisted in place at one time, so that the occupation of a channel in a construction site can be obviously reduced, the influence on the surrounding environment is reduced, and the welding quality is ensured.

By adopting the large-segment integral hoisting technology, the installation of the arch rib segments and the wind braces can be industrialized, the construction of butt welding seams on site is platformized, dangerous high-altitude operations such as hoisting, cable buckling positioning and high-altitude welding of a cable crane are avoided, and the construction risk is reduced. The temporary facilities such as the main tower and the buckling tower of the cable crane can be reduced, the use of temporary sites is reduced, and the cable crane has obvious advantages particularly for the construction of urban bridges with tense sites.

Meanwhile, in the integral hoisting process of the large-segment arch rib, the number of corner points needing to be matched is large, the requirement on the installation precision of the butt joint surface of each arch rib segment is high, the length of the large-segment arch rib of the tied arch of the steel box is long, the self weight is large, and the large-segment arch rib is easy to deform in the processes of splicing, transportation and integral one-time hoisting, so that the precision requirement of in-place folding is difficult to meet. In order to effectively reduce deformation of the large steel box tied arch section in the construction process and improve closure accuracy, the lifting basket type steel box tied arch lifting method provided by the embodiment of the invention can adjust the large section arch rib according to monitoring information in the assembling and lifting process by using temporary support for the large section arch rib of the steel box tied arch so as to meet the lifting and closure requirements.

As an embodiment of the present invention, as shown in fig. 8, step ST1 includes: the construction of the pier foundation 12, the transition pier 14, the anti-collision pier 16 and the bearing platform is carried out, firstly, the pier 12 comprises an arch rib embedded part, an arch rib embedded section 15 is installed on the arch rib embedded part, arch abutment concrete is poured, prestressed reinforcement is tensioned, then, the pier body of the transition pier 14 is constructed, and concrete in an arch rib embedded part box is preferably poured. One end of the tied arch is provided with a pier 12, a transition pier 14 and an anti-collision pier 16 at one time, and the pier 12, the transition pier 14 and the anti-collision pier are symmetrically arranged in two sets along the central perpendicular line of the length direction of the tied arch installation area.

As an embodiment of the present invention, as shown in fig. 9, step ST2 includes: and erecting an edge arch support 18, a first main arch support 7 and a second main arch support 8, and finishing the processing and manufacturing of edge arch ribs, crossbars, upright columns, cross beams and bridge deck longitudinal beams in a processing plant.

As an embodiment of the present invention, as shown in fig. 10, step ST3 includes: and (3) installing the side arches 19, the side arch ribs, the cross braces, the upright columns, the cross beams and the bridge deck system steel longitudinal beams, simultaneously or sequentially constructing and installing the side arches 19, the side arch ribs, the cross braces, the upright columns, the cross beams and the bridge deck system steel longitudinal beams at two ends of the tie bar arch, and pouring side arch tie bar anchor box concrete after the installation is finished.

As an embodiment of the present invention, as shown in fig. 11, step ST4 includes: transporting the main arch section 13 to an installation position by using a transport ship 11 or barge, then hoisting and installing the main arch section 13 by using a floating crane 20 arranged on a channel, connecting one end of the main arch section 13 with an arch springing embedded section 15, and supporting the other end of the main arch section 13 on a jacking device 10 arranged on a second main arch support 8; jacking devices 10 arranged on the first main arch support 7 and the first main arch support 7 support and adjust the middle part of the main arch section 13, and three-way jacks 1001 on the jacking devices 10 are used for accurately positioning arch ribs.

As an embodiment of the present invention, as shown in fig. 12, step ST5 includes: after the main arch section 13 is installed and adjusted in place, the middle upright posts and a plurality of bridge deck system steel beams are continuously installed, the installation length of the side arch 19 is prolonged, the side arch 19 is installed on the steel beams close to the end part of the main arch section 13, the side arch 19 is provided with a temporary tie bar 21, and two ends of the temporary tie bar 21 are respectively connected to other arch rib structures at two ends of the arch rib large section 1; 4 temporary tie rods 21 are arranged, and the cable force of the temporary tie rods is adjusted.

As an embodiment of the present invention, as shown in fig. 13, step ST6 includes: the arch rib large section 1 comprises a first arch rib section 102, a second arch rib section 103 and a vault closure section 101, the first arch rib section 102 and the second arch rib section 103 are symmetrically arranged on two sides of the vault closure section 101, the first arch rib section 102, the second arch rib section 103, the vault closure section 101 and wind supports on the arch rib large section 1 are welded on the ground, the welded arch rib large section 1 is fixedly supported on a transport ship 11 to be transported to an installation site through a first supporting and fixing column 4, a second supporting and fixing column 5 and an arch rib support 2, the transport ship 11 or a barge transports to an installation position, then hoisting and installation of the arch rib large section 1 are completed through a floating crane 20, and two ends of the arch rib large section 1 are fixedly connected with the end part of a main arch section 13 supported by the top end of a second main arch support 8 respectively.

Step ST6 further includes a preparatory work ST60, the preparatory work ST60 being performed in synchronization with one or more steps of ST1, ST2, ST3, ST4, ST5, the preparatory work ST60 including the steps of:

ST60 a: designing and dividing the arch rib large section 1;

ST60 b: manufacturing an arch rib large section 1, an arch rib support 2, a first support fixing column 4 and a second support fixing column 5;

ST60 c: assembling a large arch rib segment 1 on an arch rib support 2;

ST60 d: fixing the arch rib support 2 with the arch rib large section 1;

ST60 e: the large arch rib section 1 with the arch rib support 2 is fixed on a first support fixing column 4 and a second support fixing column 5 and transported to a hoisting site.

In ST60a, when the arch rib large segment 1 is divided, the width and the use requirement of the actual navigation channel on site are combined, and the division length of the large segment is greater than or equal to the width of the navigation channel under the condition that the influence on the navigation channel is reduced as much as possible and the hoisting equipment and the site conditions are allowed. Meanwhile, the field butt welding seams of the arch rib are reduced as much as possible, the transportation traffic capacity and the floating crane equipment performance of the channel are fully considered, the large section division is carried out by combining the equipment transportation and hoisting capacity, the arch rib large section 1 is divided into a first arch rib section 102, a second arch rib section 103 and a vault closure section 101, and the construction quality is convenient to control.

In ST60b, the method for manufacturing the arch rib large segment 1 includes the following steps:

ST60 b-1: according to the segment length confirmed by a design unit, with reference to the pre-camber of the arch rib large segment 1 calculated by construction monitoring, rib block decomposition is carried out on the arch rib large segment 1, the arch rib large segment 1 is divided into a first arch rib segment 102, a second arch rib segment 103 and a vault closure segment 101, and the first arch rib segment 102 and the second arch rib segment 103 are symmetrically arranged on two sides of the vault closure segment 101;

ST60 b-2: according to the structural characteristics of the large arch rib segment 1, firstly, the single-side arch rib segments except the closure segment are respectively assembled into arch rib blocks on a special assembly jig horizontally, after the detection is qualified, the arch rib connecting welding seams are welded, and after the finishing is qualified, the large arch rib segment 1 is assembled.

As an embodiment of the invention, the arch rib large section 1 is manufactured by adopting sectional processing of a factory, and is pre-spliced twice on a moulding bed, wherein one time is horizontal splicing and one time is vertical splicing.

When assembling the arch rib large segment 1 in ST60 c: the hoisting data information of the large segment 1 of the arch rib is measured, and the method comprises the following steps: and (3) actually butting the space coordinates of the corner points of the surfaces, feeding the coordinates back to a factory, finally adjusting the large arch rib segment 1, and determining a matching surface and a cutting surface.

In ST60d, the length of the arch rib large segment 1 is large, so that the deformation is large in the floating crane hoisting process, and the accuracy requirement of in-position folding cannot be met. Therefore, by installing the arch rib support 2, the rigidity of the large arch rib segment 1 can be enhanced, the deformation of the large arch rib segment 1 in the transportation and hoisting processes can be controlled, and the deformation of the large arch rib segment 1 in the vertical direction, the longitudinal direction and the transverse direction can be limited.

In ST60e, during transportation of the large arch rib segment 1, deformation of the large arch rib segment 1 during transportation is further reduced by providing the first and second support and fixation columns 4 and 5 on the large arch rib segment 1 for the fixed connection of the large arch rib segment 1 to the transport ship 11.

After the transportation vessel 11 transports the arch rib large section 1 to the installation site, the hoisting step ST61 of the arch rib large section 1 is performed, and ST61 includes the following steps:

ST61a, anchoring the floating crane 20 and the transport ship 11 in place according to the field condition, installing a lifting appliance, removing the connecting equipment of the arch rib large section 1 and the transport ship 11, and separating the first supporting and fixing column 4 and the second supporting and fixing column 5 from the arch rib large section 1;

ST61b, lifting the arch rib large section 1, evacuating the transport ship 11, moving the floating crane 20 to the position right above the design position of the arch rib large section 1 by self, moving the transport ship 11 to the shore and stabilizing the hull of the transport ship 11;

ST61c, slowly lowering the large arch rib segment 1 by the floating crane 20 at a constant speed, and adjusting the position of the floating crane 20 by using a cable and an anchor rope to ensure that the distance between the two ends of the large arch rib segment 1 and the butt joint surface of the installed main arch segment 13 is kept consistent;

ST61d, arranging a guide device on a support of the butt joint platform, controlling the falling speed after the floating crane 20 is placed to a guide position at a constant speed, adjusting the direction according to the on-site command requirement, ensuring that 4 sections of the large arch rib section 1 enter the guide device, and continuing to place the large arch rib section 1;

ST61e, utilizing the characteristic of a basket type steel box tie rod arch installation matching surface ' inverted V ' -shaped ', putting the main jacking stroke of a three-way jack 1001 to the maximum position, ensuring that when an arch rib large section 1 falls on the top surface of a lifting seat 1002 of the three-way jack 1001, the height is about 10cm higher than the designed elevation, ensuring that a fixed gap (related to the angle of an arch axis) is reserved between the arch rib large section 1 and the two ends of a butt joint surface, adjusting the longitudinal and transverse positions of the arch rib large section 1, enabling the actual gap value of a matching end to be consistent with the theoretical value, measuring the gap value of a cutting end, and immediately cutting and matching if an error exists;

ST61f, after the cutting and matching is finished, the backing plates of the cushion blocks at the two sides of the three-way jacks 1001 are drawn out, a gap of 2cm is kept, 4 three-way jacks 1001 on four second main arch brackets 8 are stressed and uniformly directed, scales are marked on the positions of the three-way jacks 1001, and meanwhile, the arch rib large sections 1 are synchronously and uniformly lowered to fall to the designed positions;

ST61g, slowly releasing the hanging weight of the lifting hook of the floating crane 20, observing the sedimentation conditions of the second main arch support 8 and the first main arch support 7 by a measuring group, observing oil pump data by an operator, and lifting the three-way jack 1001 in time if a small amount of sedimentation or oil pump numerical value falling of the supports is found, so as to ensure that the elevation of a large section is controlled at a design position; after the settlement is observed to be stable, welding a temporary fixing horse board, and loosening a hook of the floating crane 20;

ST61 h. carrying out the folding welding in the time period of stable temperature change at night.

The folding process in the integral hoisting of the large arch rib section 1 needs a plurality of matched angular points, and meanwhile, the adjustment is difficult after the large arch rib section 1 forms a space stable structure. Therefore, when the arch rib large section 1 is hoisted integrally, the following steps can be preferably carried out:

the accuracy of the installation of each rib segment, particularly the accuracy of the interface with the large segment 1 of the rib, is strictly controlled.

Secondly, during the pre-assembling, assembling and adjusting processes of the large arch rib sections 1, the whole-process measurement and monitoring are carried out on the relevant simulation hoisting alignment, and the accurate data of the arch rib axis, elevation and the like of each section are ensured.

And thirdly, accurately carrying out simulated hoisting alignment analysis to ensure that the deviation between the large section 1 of the arch rib and each space angular point of the installed arch rib meets the standard requirement.

Fourthly, the large arch rib section 1 is long in length and heavy in self weight, and the hoisting deformation control of the large arch rib section 1 is the key for the success of the process. The rib support 2 must have sufficient rigidity, in particular longitudinal (lengthwise) and transverse constraints. The smaller the deformation is, the smaller the cutting and matching difficulty of the steel box arch rib is, and the higher the closure precision is. Meanwhile, the smaller the deformation, the higher the rigidity of the arch rib support 2 is required, and the more the material consumption is. Therefore, the cost is comprehensively considered, and the longitudinal deformation is controlled to be +/-20 mm, and the transverse deformation is controlled to be +/-10 mm.

As a preferred embodiment of the present invention, in the process of step ST6, in order to improve the hoisting efficiency, adjust the assembly of the arch rib large segment 1 in time, and monitor and feed back the hoisting data information of the arch rib large segment 1 in the whole process, the specific steps include:

a: the spatial coordinates of the corner points of the abutting surfaces of the main arch segment 13 and the large arch rib segment 1 are monitored for 72 hours continuously. The observation time is divided into morning, noon and evening, the temperature condition during measurement is strictly recorded, the measured angular point space coordinate information and the temperature information are reported together for construction monitoring and rechecking, and the information is fed back to a processing field;

b: according to the angular point space coordinate information obtained by actual measurement on a hoisting site, the large arch rib segment 1 is tracked, measured and monitored in a processing plant, and the method is specifically divided into three segments:

the first stage is as follows: in the vertical splicing process, the arch rib large section 1 is measured, tracked and monitored, and the error between the line type and the design line type after splicing is ensured to be controllable. The main measurement positions are arch top elevation, arch axis, large segment length, vector-span ratio and the space coordinates of the corner points of the butt joint surface of the large segment 1 of the arch rib and the main arch segment 13 (steel box arch rib distortion). In order to facilitate adjustment of the arch rib large section 1, when the arch rib support 2 is installed on the arch rib large section 1, one end of the horizontal support rod 201 and one end of the vertical support rod are fixedly connected, and the other end of the horizontal support rod is temporarily connected.

And a second stage: after the data of the spatial coordinates of the corner points of the on-site butt joint surface are fed back, the data are compared with the corresponding positions of the large segments 1 of the arch ribs in the factory; carrying out simulated hoisting alignment analysis (analyzing by simulating longitudinal and transverse torsion and translation which can be carried out in the hoisting process of the large arch rib section 1) to obtain a fine adjustment scheme of the large arch rib section 1; adjusting the arch rib of the large arch rib section 1 by using a three-way jack 1001, and continuously measuring, tracking and observing until the spatial coordinate of the angular point reaches a theoretical value, and locking the arch rib support 2; and measuring the angular point space coordinates of the butt joint surface on the rechecked arch rib large section 1, taking one end with high matching degree with the data measured on site as a matching end, directly cutting and matching the end to a theoretical value in a factory, and taking the other end as a cutting and matching end.

And a third stage: after the arch rib large section 1 is lifted to the transport ship 11, carrying out the last observation in a factory, and if the deviation is found or the deformation is generated in the lifting process, adjusting in time; after the data is checked correctly, the arch rib large section 1 is locked and fixed with the transport ship 11.

After step ST6 is completed, the rib large segment 1 and the main arch segments 13 at both ends thereof are welded and both side arch segments are constructed simultaneously. When welding is carried out, a total station is used for monitoring, and when welding deformation is found to be out of tolerance, corrective measures are taken immediately.

As an embodiment of the present invention, as shown in fig. 14, step ST7 includes: after the large arch rib section 1 is integrally hoisted and welded and fixed, the arch rib support 2 on the large arch rib section 1 is removed.

As an embodiment of the present invention, as shown in fig. 15, step ST8 includes: the bridge deck system segments (steel longitudinal beams and transverse beams) manufactured by sections in a processing plant are transported to an installation site through a transport ship 11 or an iron barge, a main beam segment 23 is installed by using a floating crane 20, the bridge deck segments are installed from a fulcrum to a midspan direction section by section, suspension rods 22 are arranged on the arch rib large segments 1 and the main beam segment 23, and the bridge deck linear type and the internal force of the bridge deck longitudinal beams are controlled by using the tensile force of the suspension rods 22.

As an embodiment of the present invention, as shown in fig. 16, step ST9 includes: and after the bridge deck system longitudinal beam is hoisted and folded, the temporary tie bar 21 is removed, the permanent tie bar lock is installed, and the line type and the suspender cable force of the bridge deck longitudinal beam are adjusted by adjusting the tie bar cable.

As an embodiment of the present invention, as shown in fig. 17, step ST10 includes: the side arch support 18, the first main arch support 7 and the second main arch support 8 are removed.

As an embodiment of the present invention, as shown in fig. 18, step ST11 includes: a bridge deck crane 24 is arranged on the bridge deck steel beam, the bridge deck crane 24 is provided with a concrete bridge deck from the midspan to the pivot, and the displacement of the arch support is controlled within plus or minus 10mm by adjusting the cable force of the tie rods. Specifically, the bridge deck linear type and the internal force of a main longitudinal beam are controlled by adjusting the cable force of the suspender, the wet joint of the bridge deck is poured, the sequence is the same as the installation sequence of the concrete bridge deck, the cable force of the tie rod is adjusted to 3412KN, and the arch abutment moves 1.3mm to the shore.

As an embodiment of the present invention, as shown in fig. 19, the public step ST12 includes: and installing other auxiliary devices for paving the bridge deck, and adjusting the cable force to control the displacement of the arch support, thereby forming the bridge. For example, as an embodiment of the present invention, the rope force 3442KN is adjusted to control the abutment displacement by 5 mm.

The lifting basket type steel box tied arch hoisting method provided by the invention brings the following economic benefits:

1) temporary facilities such as a main tower, a buckling tower and a buckling cable anchor are not required to be invested, and materials and land are saved.

2) Effectively reduces the time occupied by the navigation channel and greatly saves the expenses of navigation channel warning and the like.

3) The site construction is changed into factory construction, the equipment use efficiency is improved, the personnel cost is obviously reduced, and the high-altitude operation risk is effectively reduced. The original flow process is changed, the operation is carried out in parallel, the construction period is greatly reduced, and the labor cost and the mechanical cost are saved.

In the description of the present invention, it should be noted that the terms "upper", "lower", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, which are merely for convenience in describing the present invention and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed in a specific orientation, and operate, and thus, should not be construed as limiting the present invention. Unless expressly stated or limited otherwise, the terms "mounted," "connected," and "connected" are intended to be inclusive and mean, for example, that they may be fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.

It is to be noted that, in the present invention, relational terms such as "first" and "second", and the like, are used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising an … …" does not exclude the presence of other identical elements in a process, method, article, or apparatus that comprises the element.

The foregoing are merely exemplary embodiments of the present invention, which enable those skilled in the art to understand or practice the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the invention. Thus, the present invention is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims (10)

1. A temporary support system for a tied arch of a basket type steel box is used for temporarily supporting the tied arch of the basket type steel box in the construction processes of assembling, transporting, hoisting and the like of the tied arch of the basket type steel box, and comprises:

a rib support (2); the arch rib support (2) comprises a horizontal support rod (201) and a vertical support unit;

the basket type steel box tie rod arch is composed of an arch rib large section (1) and main arch sections (13) positioned at two ends of the arch rib large section (1); wherein the content of the first and second substances,

the arch rib large section (1) is formed by splicing a vault closure section (101), a first arch rib section (102) and a second arch rib section (103) which are respectively arranged at two ends of the vault closure section (101);

the horizontal supporting rod (201) is arranged horizontally, and the lower end of the vertical supporting unit is fixed on the horizontal supporting rod (201) and is arranged vertically to the horizontal supporting rod;

in a use state, two ends of the horizontal support rod (201) are respectively connected with the first arch rib section (102) and the second arch rib section (103), and the upper end of the vertical support unit is connected with the vault closure section (101).

2. A temporary support system for the tied arches of a basket-type steel box according to claim 1,

the first rib segment (102) and the second rib segment (103) are identical in structure;

the vertical supporting unit comprises a first supporting unit (202) and a second supporting unit (203) which have the same structure;

the first supporting unit (202) and the second supporting unit (203) respectively form a triangular structure with the horizontal supporting rod (201), and are symmetrically distributed on two sides of the central point of the horizontal supporting rod (201);

in the use state, the vertex of the triangular structure is connected with the vault closure section (101).

3. A basket type steel box tie bar arch temporary support system as claimed in claim 2,

the device comprises a first supporting and fixing column (4) and a second supporting and fixing column (5) which have the same structure; in the use state:

the top end of the first supporting and fixing column (4) is fixed at the joint of the first arch rib section (102) and the vault closure section (101);

the top end of the second supporting and fixing column (5) is fixed at the joint of the second arch rib section (103) and the vault closure section (101);

the bottom ends of the first supporting and fixing column (4) and the second supporting and fixing column (5) are fixed on a transport ship (11).

4. A temporary support system for the tied arches of a basket-type steel box according to claim 3,

the first supporting and fixing column (4) comprises a first upright column (401) and a second upright column (402) which are vertically arranged; in the use state:

the bottom ends of the first upright column (401) and the second upright column (402) are fixed on a transport ship (11);

the top ends of the first upright post (401) and the second upright post (402) are symmetrically arranged at two sides of the joint of the first arch rib section (102) and the arch closure section (101);

the first upright (401) is fixed with the first arch rib section (102), and the second upright (402) is fixed with the vault closure section (101).

5. A temporary support system for the tied arches of a basket-type steel box according to claim 4,

a connecting device is arranged between the first upright post (401) and the second upright post (402);

the connecting means comprises a plurality of struts connected between the first upright (401) and the second upright (402).

6. A method for hoisting tied arches of basket-type steel box, which is based on the temporary supporting system of tied arches of basket-type steel box as claimed in any one of claims 1 to 5, and is characterized in that it comprises:

manufacturing an arch rib support (2), a first support fixing column (4) and a second support fixing column (5);

assembling a large arch rib section (1) on the arch rib support (2);

transporting the large arch rib segment (1) with the arch rib support (2) to a hoisting place;

integrally hoisting the large arch rib segment (1) with the arch rib support (2);

and (3) dismantling the arch rib support (2).

7. The method for hoisting the tied arch of the basket type steel box according to claim 6,

before integrally hoisting the large arch rib segment (1) with the arch rib support (2), the method further comprises the following steps:

installing a first main arch bracket (7) and a second main arch bracket (8);

hoisting the main arch segment (13);

the first main arch support (7) and the second main arch support (8) are used for temporarily supporting the main arch section (13).

8. The method for hoisting the tied arch of the basket type steel box according to claim 6,

the large arch rib segment (1) consists of a first arch rib segment (102), a second arch rib segment (103) and a vault closure segment (101);

in the process of assembling the large arch rib section (1) on the arch rib support (2):

monitoring and feeding back hoisting data information of the large arch rib segment (1);

carrying out simulated hoisting alignment analysis on the arch rib large section (1);

and adjusting the splicing of the first arch rib section (102), the second arch rib section (103) and the vault closure section (101) according to the hoisting data information and/or the simulated hoisting alignment analysis.

9. The method for hoisting the tied arch of the basket type steel box according to claim 6,

before the large arch rib section (1) with the arch rib support (2) is transported, a first supporting and fixing column (4) and a second supporting and fixing column (5) are installed on the large arch rib section (1) with the arch rib support (2);

after the large arch rib section (1) with the arch rib support (2) reaches the hoisting place, the connection between the large arch rib section (1) with the arch rib support (2) and the first support fixing column (4) and the second support fixing column (5) is released.

10. The method for hoisting the tied arch of the basket type steel box according to claim 8,

the hoisting data information comprises:

the corner point space coordinates of the butt joint surface of the large arch rib segment (1) and the main arch segment (13);

temperature conditions during the hoisting process.

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