CN109083023B - Continuous rigid frame bridge adopting stiffened framework and construction method thereof - Google Patents

Continuous rigid frame bridge adopting stiffened framework and construction method thereof Download PDF

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CN109083023B
CN109083023B CN201811036967.XA CN201811036967A CN109083023B CN 109083023 B CN109083023 B CN 109083023B CN 201811036967 A CN201811036967 A CN 201811036967A CN 109083023 B CN109083023 B CN 109083023B
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beam body
web member
framework
sections
section
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CN109083023A (en
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孙测世
周水兴
郑铁
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Chongqing Jiaotong University
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Chongqing Jiaotong University
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    • EFIXED CONSTRUCTIONS
    • E01CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
    • E01DCONSTRUCTION OF BRIDGES, ELEVATED ROADWAYS OR VIADUCTS; ASSEMBLY OF BRIDGES
    • E01D21/00Methods or apparatus specially adapted for erecting or assembling bridges
    • E01D21/10Cantilevered erection
    • EFIXED CONSTRUCTIONS
    • E01CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
    • E01DCONSTRUCTION OF BRIDGES, ELEVATED ROADWAYS OR VIADUCTS; ASSEMBLY OF BRIDGES
    • E01D19/00Structural or constructional details of bridges

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Abstract

The invention provides a continuous rigid frame bridge adopting a rigid framework and a construction method thereof, wherein the continuous rigid frame bridge comprises a pier top and a beam body connected to two sides of the pier top, the pier top and the beam body are both of reinforced concrete structures, the pier top rigid framework is embedded in the pier top, the beam body rigid framework is embedded in the beam body, and the beam body rigid framework and the pier top rigid framework are fixedly connected to form an integral structure; when the beam body is manufactured, the beam body stiff skeleton is used as a supporting structure to carry out hanging basket pouring operation; the beneficial technical effects of the invention are as follows: the scheme can effectively improve the construction efficiency and reduce the operation risk and the construction cost.

Description

Continuous rigid frame bridge adopting stiffened framework and construction method thereof
Technical Field
The invention relates to a bridge construction technology, in particular to a continuous rigid frame bridge adopting a stiff framework and a construction method thereof.
Background
In the prior art, when a continuous rigid frame bridge is built, a beam body is usually cast in a cantilever manner section by adopting a rear fulcrum hanging basket mode. Because the bearing capacity of the rear fulcrum hanging basket and the template system is limited, the length of a single pouring section cannot be too long, usually only 3-4 meters, and the closure section is usually only 2 meters; the beam body is required to be divided into a plurality of pouring sections for pouring due to the limitation of the length of a single pouring section, so that the construction period is long; in addition, when the cradle is moved from one station to another station, the basket is in overturning risk during the movement process only by the left-hand catch device because the anchoring cables of the rear pivot are loosened. Because the number of the pouring sections is large, the hanging basket needs to be moved for multiple times correspondingly, the operation is troublesome, the construction cost is high, and the operation risk is improved along with the increase of the moving times.
Disclosure of Invention
Aiming at the problems in the background art, the invention provides a construction method of a continuous rigid frame bridge adopting a rigid framework, wherein the continuous rigid frame bridge comprises a pier top and a beam body connected to two sides of the pier top, the pier top and the beam body are both of reinforced concrete structures, the pier top rigid framework is embedded in the pier top, and the pier top rigid framework and a reinforcement cage in the pier top are arranged in a staggered manner; a beam body stiff skeleton is embedded in the beam body, the inner end of the beam body stiff skeleton is fixedly connected with the pier top stiff skeleton to form an integral structure, the outer end of the beam body stiff skeleton extends to the closure section of the beam body, and the beam body stiff skeleton and a reinforcement cage in the beam body are arranged in a staggered mode; the single beam body stiff skeleton consists of a plurality of skeleton sections, and the plurality of skeleton sections are arranged along the beam body in the axial direction;
the single framework section consists of two sets of support structures, and each set of support structure consists of an upper chord member, a lower chord member, an inner web member, an outer web member, an inclined web member, a first main inclined strut and a second main inclined strut; the inner web member and the outer web member are vertically arranged, and the inner web member is closer to the pier top than the outer web member; one end of the upper chord is connected with the upper end of the inner web member, and the other end of the upper chord is connected with the upper end of the outer web member; one end of the lower chord is connected with the lower end of the inner web member, and the other end of the lower chord is connected with the lower end of the outer web member; the joint of the upper chord and the inner web member forms an upper inner contact point, the joint of the upper chord and the outer web member forms an upper outer contact point, the joint of the lower chord and the inner web member forms a lower inner contact point, and the joint of the lower chord and the outer web member forms a lower outer contact point; one end of the diagonal web member is connected with the upper inner contact point, and the other end of the diagonal web member is connected with the lower outer contact point; one end of the first main inclined strut is connected with the middle part of the upper chord member, and the other end of the first main inclined strut is connected with the middle part of the inner web member; one end of the second main inclined strut is connected with the upper external connection point, and the other end of the second main inclined strut is connected with the lower internal connection point; (ii) a The axial direction of the upper chord is parallel to the axial direction of the beam body; the crossing part of the diagonal web member and the first main diagonal brace is welded and fixed, and the crossing part of the diagonal web member and the second main diagonal brace is welded and fixed;
two sets of support structures governed by a single framework section are transversely distributed along a beam body, upper chords of the two sets of support structures are welded and fixed through a plurality of upper transverse connecting plates, and lower chords of the two sets of support structures are welded and fixed through a plurality of lower transverse connecting plates;
respectively marking three framework sections which are sequentially connected as a framework section I, a framework section II and a framework section III, and setting the framework section I to be closest to the pier top, wherein the inner web rod of the framework section II is the outer web rod of the framework section I, and the outer web rod of the framework section II is the inner web rod of the framework section III;
the two beam body stiff skeleton structures are symmetrical;
the single upper chord member consists of two section steels which are transversely distributed along the beam body, the sections of the section steels are T-shaped, and the top surfaces of the two section steels are welded and fixed through a plurality of steel plates;
the single outer web member consists of two first steel strips, the two first steel strips are transversely distributed along the beam body, the large plane of each first steel strip is parallel to the plane of the web plate of the beam body, and the two first steel strips are welded and fixed through a plurality of steel plates;
the single inner web member consists of two second steel strips, the two second steel strips are transversely distributed along the beam body, the large plane of each second steel strip is parallel to the plane of the web plate of the beam body, and the two second steel strips are welded and fixed through a plurality of steel plates;
the single inclined web member consists of two third steel strips, the two third steel strips are transversely distributed along the beam body, the large plane of each third steel strip is parallel to the plane of the web plate of the beam body, and the two third steel strips are welded and fixed through a plurality of steel plates;
the single first main inclined strut consists of two fourth steel strips, the two fourth steel strips are transversely distributed along the beam body, the large plane of each fourth steel strip is parallel to the plane of the web plate of the beam body, and the two fourth steel strips are welded and fixed through a plurality of steel plates;
the single second main inclined strut consists of two fifth steel plates which are transversely distributed along the beam body, the large plane of each fifth steel plate is parallel to the plane of the web plate of the beam body, and the two fifth steel plates are welded and fixed through a plurality of steel plates;
the single lower chord is a wide-mouth U-shaped section steel;
the innovation lies in that: the construction method comprises the steps of pier top manufacturing and beam body manufacturing, wherein after the pier top manufacturing is finished, the beam body manufacturing is carried out;
the pier top manufacturing comprises the following steps:
after the pier column is manufactured, a pier top stiff framework and a pier top steel reinforcement cage are built on the pier column, then a pier top template is manufactured, and then the pier top is poured;
the beam body manufacturing comprises the following steps:
for a single beam body, dividing the single beam body into a No. 1 section, a No. 2 section and a No. 3 section from inside to outside, wherein the plurality of sections correspond to the plurality of framework sections one by one; after the pier top is manufactured, synchronously building framework sections corresponding to the two No. 1 sections on two sides of the pier top, then laying rails on upper chords of the framework sections corresponding to the two No. 1 sections, then building a hanging basket system on the rails corresponding to the two No. 1 sections, then building a beam body reinforcement cage and a template corresponding to the No. 1 section by using the hanging basket system, and then synchronously pouring the two No. 1 sections; then, synchronously building framework sections corresponding to the two No. 2 sections, then laying rails on upper chords of the framework sections corresponding to the two No. 2 sections, respectively moving the two hanging basket systems to the rails corresponding to the two No. 2 sections and stopping, then building a beam body reinforcement cage and a template corresponding to the No. 2 section by using the hanging basket systems, and then synchronously pouring the two No. 2 sections; then, synchronously building framework sections corresponding to the two 3-number sections, then laying tracks on upper chords of the framework sections corresponding to the two 3-number sections, respectively moving the two hanging basket systems to the tracks corresponding to the two 3-number sections and stopping, then building beam body reinforcement cages and templates corresponding to the 3-number sections by using the hanging basket systems, then synchronously pouring the two 3-number sections, then synchronously building framework sections corresponding to the two n-number sections, then laying tracks on the upper chords of the framework sections corresponding to the two n-number sections, respectively moving the two hanging basket systems to the tracks corresponding to the two n-number sections and stopping, then building the beam body cages and templates corresponding to the n-number sections by using the hanging basket systems, and then synchronously pouring the two n-number sections;
the hanging basket system comprises a walking mechanism and a template system; the walking mechanism comprises a supporting frame and four walking wheels; the walking wheels are arranged at the bottom of the support frame, the four walking wheels are distributed in a rectangular shape, the two walking wheels on the left side are in contact with the track on the upper chord on the left side of the framework section, the two walking wheels on the right side are in contact with the track on the upper chord on the right side of the framework section, and the support frame can axially move along the track through the walking wheels; the plane where the four walking wheels are located forms a supporting surface, and the projection of the gravity center of the cradle system on the supporting surface is located in the middle of the area surrounded by the four walking wheels; the template system is hoisted on the support frame through a plurality of hoisting rods; the framework section and the beam body reinforcement cage are positioned in an inner cavity of the template system; the distance between the upper ends of the first main inclined strut and the second main inclined strut is B, and the size of B can be adjusted (the axial length of the framework sections corresponding to different sections is different, so that the distance between the upper ends of the first main inclined strut and the upper ends of the second main inclined strut can be changed, and therefore the size of B is changed along with the size change of A, and the size adjustment of B can be realized by adjusting the relative position of the walking wheels and the supporting frame in specific implementation); in the single-set supporting structure, the distance between the upper end of the first main inclined strut and the upper end of the second main inclined strut is marked as A, and B is equal to A; when the cradle system is parked, the position of the walking wheel at the front end of the support frame corresponds to the upper end of the second main inclined strut, and the position of the walking wheel at the rear end of the support frame corresponds to the upper end of the first main inclined strut.
The principle of the invention is as follows: among the prior art so adopt the back fulcrum to hang basket construction mode and pour the roof beam body of continuous rigid frame bridge, mainly consider the structural feature of the roof beam body: the beam body of the continuous rigid frame bridge is usually a reinforced concrete structure, and before the cast sections are formed, the beam body has no bearing capacity, and only a template system and a rear fulcrum hanging basket can be used for transferring the weight of newly cast concrete to the cast sections and bearing the weight of the newly cast concrete by the cast sections, so that the rear fulcrum hanging basket can only be anchored and supported on the cast sections; the heavier the concrete that single festival section need be pour is, and the bearing capacity and the antidumping requirement to template and string basket are just higher, and in order to reduce the degree of difficulty, the concrete festival section length of pouring at every turn among the prior art is only 3 ~ 4m usually, to the continuous rigid frame bridge of super large-span, just need many sections, construction cycle is longer.
If the length of the concrete pouring section is to be increased, the stress condition of the hanging basket must be changed, a new supporting structure is required to be provided for the hanging basket in the construction process, and therefore the inventor analyzes other existing bridges. The inventor finds that the stiff framework can be used as a supporting structure of a hanging basket before casting sections for forming by using the stiff framework as a bearing structure by referring to the construction method of the stiff framework of the existing concrete arch bridge; when pouring, the stiff framework can be directly poured into the beam body without dismantling, and the operation is convenient, so that the inventor carries out deep research on the application problem of the stiff framework on the continuous rigid frame bridge.
When a new pouring section is manufactured, a stiff framework can be built at the outer end of the formed section, and then the hanging basket is placed on the exposed stiff framework. 2 diagonal braces are arranged in the stiff skeleton, the supporting points of the hanging baskets are exactly in one-to-one correspondence with the diagonal braces, the pressure of the hanging baskets on the stiff skeleton is transmitted to the formed casting segment in the form of axial force through the diagonal braces, the force transmission mode is simpler and more reasonable, and thus the structure of the hanging baskets can be greatly simplified, the weight is greatly reduced, and the construction operation and the movement are convenient; in addition, the gravity center of the hanging basket is always in the middle of the supporting plane, the hanging basket has no overturning moment, the overturning risk can be thoroughly solved, and the 'overturning prevention' anchoring is not needed; in addition, the stiff framework has larger bearing capacity, so that the length of the casting segment can be increased, and the number of the segments can be reduced. The method is simple and convenient to operate, and the construction efficiency and safety can be improved well.
It should be clear to those skilled in the art that, for a complete continuous rigid frame bridge, in addition to the beam body, a corresponding closure section and a side span cast-in-place section should be manufactured, and by using the scheme of the present invention to manufacture the closure section, the length of the closure section can be correspondingly increased.
Based on the scheme, the invention also provides a continuous rigid frame bridge adopting the stiff skeleton, which comprises a pier top and a beam body connected to two sides of the pier top, wherein the pier top and the beam body are both of reinforced concrete structures, and the innovation of the continuous rigid frame bridge is as follows: a pier top stiff skeleton is embedded in the pier top, and the pier top stiff skeleton and a reinforcement cage in the pier top are arranged in a staggered mode; a beam body stiff skeleton is embedded in the beam body, the inner end of the beam body stiff skeleton is fixedly connected with the pier top stiff skeleton to form an integral structure, the outer end of the beam body stiff skeleton extends to the closure section of the beam body, and the beam body stiff skeleton and a reinforcement cage in the beam body are arranged in a staggered mode; the single beam body stiff skeleton consists of a plurality of skeleton sections, and the plurality of skeleton sections are arranged along the beam body in the axial direction;
the single framework section consists of two sets of support structures, and each set of support structure consists of an upper chord member, a lower chord member, an inner web member, an outer web member, an inclined web member, a first main inclined strut and a second main inclined strut; the inner web member and the outer web member are vertically arranged, and the inner web member is closer to the pier top than the outer web member; one end of the upper chord is connected with the upper end of the inner web member, and the other end of the upper chord is connected with the upper end of the outer web member; one end of the lower chord is connected with the lower end of the inner web member, and the other end of the lower chord is connected with the lower end of the outer web member; the joint of the upper chord and the inner web member forms an upper inner contact point, the joint of the upper chord and the outer web member forms an upper outer contact point, the joint of the lower chord and the inner web member forms a lower inner contact point, and the joint of the lower chord and the outer web member forms a lower outer contact point; one end of the diagonal web member is connected with the upper inner contact point, and the other end of the diagonal web member is connected with the lower outer contact point; one end of the first main inclined strut is connected with the middle part of the upper chord member, and the other end of the first main inclined strut is connected with the middle part of the inner web member; one end of the second main inclined strut is connected with the upper external connection point, and the other end of the second main inclined strut is connected with the lower internal connection point; the axial direction of the upper chord is parallel to the axial direction of the beam body; the crossing part of the diagonal web member and the first main diagonal brace is welded and fixed, and the crossing part of the diagonal web member and the second main diagonal brace is welded and fixed;
two sets of support structures governed by a single framework section are transversely distributed along a beam body, upper chords of the two sets of support structures are welded and fixed through a plurality of upper transverse connecting plates, and lower chords of the two sets of support structures are welded and fixed through a plurality of lower transverse connecting plates;
respectively marking three framework sections which are sequentially connected as a framework section I, a framework section II and a framework section III, and setting the framework section I to be closest to the pier top, wherein the inner web rod of the framework section II is the outer web rod of the framework section I, and the outer web rod of the framework section II is the inner web rod of the framework section III;
the two beam body stiff skeleton structures are symmetrical;
the single upper chord member consists of two section steels which are transversely distributed along the beam body, the sections of the section steels are T-shaped, and the top surfaces of the two section steels are welded and fixed through a plurality of steel plates;
the single outer web member consists of two first steel strips, the two first steel strips are transversely distributed along the beam body, the large plane of each first steel strip is parallel to the plane of the web plate of the beam body, and the two first steel strips are welded and fixed through a plurality of steel plates;
the single inner web member consists of two second steel strips, the two second steel strips are transversely distributed along the beam body, the large plane of each second steel strip is parallel to the plane of the web plate of the beam body, and the two second steel strips are welded and fixed through a plurality of steel plates;
the single inclined web member consists of two third steel strips, the two third steel strips are transversely distributed along the beam body, the large plane of each third steel strip is parallel to the plane of the web plate of the beam body, and the two third steel strips are welded and fixed through a plurality of steel plates;
the single first main inclined strut consists of two fourth steel strips, the two fourth steel strips are transversely distributed along the beam body, the large plane of each fourth steel strip is parallel to the plane of the web plate of the beam body, and the two fourth steel strips are welded and fixed through a plurality of steel plates;
the single second main inclined strut consists of two fifth steel plates which are transversely distributed along the beam body, the large plane of each fifth steel plate is parallel to the plane of the web plate of the beam body, and the two fifth steel plates are welded and fixed through a plurality of steel plates;
the single lower chord is a wide-mouth U-shaped section steel.
Based on the prior art, corresponding prestressed tendons are generally required to be arranged on a continuous rigid frame bridge, so as to avoid interference between a stiff framework and the prestressed tendons, an inner web member, an outer web member, an inclined web member, a first main inclined strut and a second main inclined strut on the stiff framework are all formed by two steel plates, the two steel plates are welded through a plurality of steel plates, the corresponding prestressed tendons can be arranged between the steel plates and extend through gaps between the (welded) steel plates, and therefore interference between the stiff framework and the prestressed tendons can be avoided.
The beneficial technical effects of the invention are as follows: the scheme can effectively improve the construction efficiency and reduce the operation risk and the construction cost.
Drawings
FIG. 1 is a schematic structural diagram of a continuous rigid frame bridge framework of the present invention;
FIG. 2 is a schematic view of a beam body stiff skeleton;
FIG. 3 is a schematic view of a single support structure;
FIG. 4 is a schematic view of the construction method of the present invention;
FIG. 5 is a schematic cross-sectional view of a beam body stiff skeleton;
the names corresponding to each mark in the figure are respectively: the steel formwork comprises an upper chord 1, a lower chord 2, an inner web member 3, an outer web member 4, an inclined web member 5, a first main inclined strut 6, a second main inclined strut 7, a walking mechanism 8, a suspender 9, a construction platform 10 in a formwork system, section steel 11 and wide-mouth U-shaped section steel 12.
Detailed Description
The utility model provides an adopt continuous rigid frame bridge of strength nature skeleton, includes the mound top and connects the roof beam body in mound top both sides, and mound top and roof beam body are reinforced concrete structure, and its innovation lies in: a pier top stiff skeleton is embedded in the pier top, and the pier top stiff skeleton and a reinforcement cage in the pier top are arranged in a staggered mode; a beam body stiff skeleton is embedded in the beam body, the inner end of the beam body stiff skeleton is fixedly connected with the pier top stiff skeleton to form an integral structure, the outer end of the beam body stiff skeleton extends to the closure section of the beam body, and the beam body stiff skeleton and a reinforcement cage in the beam body are arranged in a staggered mode; the single beam body stiff skeleton consists of a plurality of skeleton sections, and the plurality of skeleton sections are arranged along the beam body in the axial direction;
the single framework section consists of two sets of support structures, and each set of support structure consists of an upper chord member, a lower chord member, an inner web member, an outer web member, an inclined web member, a first main inclined strut and a second main inclined strut; the inner web member and the outer web member are vertically arranged, and the inner web member is closer to the pier top than the outer web member; one end of the upper chord is connected with the upper end of the inner web member, and the other end of the upper chord is connected with the upper end of the outer web member; one end of the lower chord is connected with the lower end of the inner web member, and the other end of the lower chord is connected with the lower end of the outer web member; the joint of the upper chord and the inner web member forms an upper inner contact point, the joint of the upper chord and the outer web member forms an upper outer contact point, the joint of the lower chord and the inner web member forms a lower inner contact point, and the joint of the lower chord and the outer web member forms a lower outer contact point; one end of the diagonal web member is connected with the upper inner contact point, and the other end of the diagonal web member is connected with the lower outer contact point; one end of the first main inclined strut is connected with the middle part of the upper chord member, and the other end of the first main inclined strut is connected with the middle part of the inner web member; one end of the second main inclined strut is connected with the upper external connection point, and the other end of the second main inclined strut is connected with the lower internal connection point; the axial direction of the upper chord is parallel to the axial direction of the beam body; the crossing part of the diagonal web member and the first main diagonal brace is welded and fixed, and the crossing part of the diagonal web member and the second main diagonal brace is welded and fixed;
two sets of support structures governed by a single framework section are transversely distributed along a beam body, upper chords of the two sets of support structures are welded and fixed through a plurality of upper transverse connecting plates, and lower chords of the two sets of support structures are welded and fixed through a plurality of lower transverse connecting plates;
respectively marking three framework sections which are sequentially connected as a framework section I, a framework section II and a framework section III, and setting the framework section I to be closest to the pier top, wherein the inner web rod of the framework section II is the outer web rod of the framework section I, and the outer web rod of the framework section II is the inner web rod of the framework section III;
the two beam body stiff skeleton structures are symmetrical;
the single upper chord member consists of two section steels which are transversely distributed along the beam body, the sections of the section steels are T-shaped, and the top surfaces of the two section steels are welded and fixed through a plurality of steel plates;
the single outer web member consists of two first steel strips, the two first steel strips are transversely distributed along the beam body, the large plane of each first steel strip is parallel to the plane of the web plate of the beam body, and the two first steel strips are welded and fixed through a plurality of steel plates;
the single inner web member consists of two second steel strips, the two second steel strips are transversely distributed along the beam body, the large plane of each second steel strip is parallel to the plane of the web plate of the beam body, and the two second steel strips are welded and fixed through a plurality of steel plates;
the single inclined web member consists of two third steel strips, the two third steel strips are transversely distributed along the beam body, the large plane of each third steel strip is parallel to the plane of the web plate of the beam body, and the two third steel strips are welded and fixed through a plurality of steel plates;
the single first main inclined strut consists of two fourth steel strips, the two fourth steel strips are transversely distributed along the beam body, the large plane of each fourth steel strip is parallel to the plane of the web plate of the beam body, and the two fourth steel strips are welded and fixed through a plurality of steel plates;
the single second main inclined strut consists of two fifth steel plates which are transversely distributed along the beam body, the large plane of each fifth steel plate is parallel to the plane of the web plate of the beam body, and the two fifth steel plates are welded and fixed through a plurality of steel plates;
the single lower chord is a wide-mouth U-shaped section steel.
A construction method of a continuous rigid frame bridge adopting a rigid framework comprises a pier top and a beam body connected to two sides of the pier top, wherein the pier top and the beam body are both of a reinforced concrete structure, the pier top rigid framework is embedded in the pier top, and the pier top rigid framework and a reinforcement cage in the pier top are arranged in a staggered mode; a beam body stiff skeleton is embedded in the beam body, the inner end of the beam body stiff skeleton is fixedly connected with the pier top stiff skeleton to form an integral structure, the outer end of the beam body stiff skeleton extends to the closure section of the beam body, and the beam body stiff skeleton and a reinforcement cage in the beam body are arranged in a staggered mode; the single beam body stiff skeleton consists of a plurality of skeleton sections, and the plurality of skeleton sections are arranged along the beam body in the axial direction;
the single framework section consists of two sets of support structures, and each set of support structure consists of an upper chord member, a lower chord member, an inner web member, an outer web member, an inclined web member, a first main inclined strut and a second main inclined strut; the inner web member and the outer web member are vertically arranged, and the inner web member is closer to the pier top than the outer web member; one end of the upper chord is connected with the upper end of the inner web member, and the other end of the upper chord is connected with the upper end of the outer web member; one end of the lower chord is connected with the lower end of the inner web member, and the other end of the lower chord is connected with the lower end of the outer web member; the joint of the upper chord and the inner web member forms an upper inner contact point, the joint of the upper chord and the outer web member forms an upper outer contact point, the joint of the lower chord and the inner web member forms a lower inner contact point, and the joint of the lower chord and the outer web member forms a lower outer contact point; one end of the diagonal web member is connected with the upper inner contact point, and the other end of the diagonal web member is connected with the lower outer contact point; one end of the first main inclined strut is connected with the middle part of the upper chord member, and the other end of the first main inclined strut is connected with the middle part of the inner web member; one end of the second main inclined strut is connected with the upper external connection point, and the other end of the second main inclined strut is connected with the lower internal connection point; (ii) a The axial direction of the upper chord is parallel to the axial direction of the beam body; the crossing part of the diagonal web member and the first main diagonal brace is welded and fixed, and the crossing part of the diagonal web member and the second main diagonal brace is welded and fixed;
two sets of support structures governed by a single framework section are transversely distributed along a beam body, upper chords of the two sets of support structures are welded and fixed through a plurality of upper transverse connecting plates, and lower chords of the two sets of support structures are welded and fixed through a plurality of lower transverse connecting plates;
respectively marking three framework sections which are sequentially connected as a framework section I, a framework section II and a framework section III, and setting the framework section I to be closest to the pier top, wherein the inner web rod of the framework section II is the outer web rod of the framework section I, and the outer web rod of the framework section II is the inner web rod of the framework section III;
the two beam body stiff skeleton structures are symmetrical;
the single upper chord member consists of two section steels which are transversely distributed along the beam body, the sections of the section steels are T-shaped, and the top surfaces of the two section steels are welded and fixed through a plurality of steel plates;
the single outer web member consists of two first steel strips, the two first steel strips are transversely distributed along the beam body, the large plane of each first steel strip is parallel to the plane of the web plate of the beam body, and the two first steel strips are welded and fixed through a plurality of steel plates;
the single inner web member consists of two second steel strips, the two second steel strips are transversely distributed along the beam body, the large plane of each second steel strip is parallel to the plane of the web plate of the beam body, and the two second steel strips are welded and fixed through a plurality of steel plates;
the single inclined web member consists of two third steel strips, the two third steel strips are transversely distributed along the beam body, the large plane of each third steel strip is parallel to the plane of the web plate of the beam body, and the two third steel strips are welded and fixed through a plurality of steel plates;
the single first main inclined strut consists of two fourth steel strips, the two fourth steel strips are transversely distributed along the beam body, the large plane of each fourth steel strip is parallel to the plane of the web plate of the beam body, and the two fourth steel strips are welded and fixed through a plurality of steel plates;
the single second main inclined strut consists of two fifth steel plates which are transversely distributed along the beam body, the large plane of each fifth steel plate is parallel to the plane of the web plate of the beam body, and the two fifth steel plates are welded and fixed through a plurality of steel plates;
the single lower chord is a wide-mouth U-shaped section steel;
the innovation lies in that: the construction method comprises the steps of pier top manufacturing and beam body manufacturing, wherein after the pier top manufacturing is finished, the beam body manufacturing is carried out;
the pier top manufacturing comprises the following steps:
after the pier column is manufactured, a pier top stiff framework and a pier top steel reinforcement cage are built on the pier column, then a pier top template is manufactured, and then the pier top is poured;
the beam body manufacturing comprises the following steps:
for a single beam body, dividing the single beam body into a No. 1 section, a No. 2 section and a No. 3 section from inside to outside, wherein the plurality of sections correspond to the plurality of framework sections one by one; after the pier top is manufactured, synchronously building framework sections corresponding to the two No. 1 sections on two sides of the pier top, then laying rails on upper chords of the framework sections corresponding to the two No. 1 sections, then building a hanging basket system on the rails corresponding to the two No. 1 sections, then building a beam body reinforcement cage and a template corresponding to the No. 1 section by using the hanging basket system, and then synchronously pouring the two No. 1 sections; then, synchronously building framework sections corresponding to the two No. 2 sections, then laying rails on upper chords of the framework sections corresponding to the two No. 2 sections, respectively moving the two hanging basket systems to the rails corresponding to the two No. 2 sections and stopping, then building a beam body reinforcement cage and a template corresponding to the No. 2 section by using the hanging basket systems, and then synchronously pouring the two No. 2 sections; then, synchronously building framework sections corresponding to the two 3-number sections, then laying tracks on upper chords of the framework sections corresponding to the two 3-number sections, respectively moving the two hanging basket systems to the tracks corresponding to the two 3-number sections and stopping, then building beam body reinforcement cages and templates corresponding to the 3-number sections by using the hanging basket systems, then synchronously pouring the two 3-number sections, then synchronously building framework sections corresponding to the two n-number sections, then laying tracks on the upper chords of the framework sections corresponding to the two n-number sections, respectively moving the two hanging basket systems to the tracks corresponding to the two n-number sections and stopping, then building the beam body cages and templates corresponding to the n-number sections by using the hanging basket systems, and then synchronously pouring the two n-number sections;
the hanging basket system comprises a walking mechanism and a template system; the walking mechanism comprises a supporting frame and four walking wheels; the walking wheels are arranged at the bottom of the support frame, the four walking wheels are distributed in a rectangular shape, the two walking wheels on the left side are in contact with the track on the upper chord on the left side of the framework section, the two walking wheels on the right side are in contact with the track on the upper chord on the right side of the framework section, and the support frame can axially move along the track through the walking wheels; the plane where the four walking wheels are located forms a supporting surface, and the projection of the gravity center of the cradle system on the supporting surface is located in the middle of the area surrounded by the four walking wheels; the template system is hoisted on the support frame through a plurality of hoisting rods; the framework section and the beam body reinforcement cage are positioned in an inner cavity of the template system; the distance between the walking wheels at the front end of the support frame and the walking wheels at the rear end of the support frame in the axial direction of the framework section is marked as B, and the size of B can be adjusted; in the single-set supporting structure, the distance between the upper end of the first main inclined strut and the upper end of the second main inclined strut is marked as A, and B is equal to A; when the cradle system is parked, the position of the walking wheel at the front end of the support frame corresponds to the upper end of the second main inclined strut, and the position of the walking wheel at the rear end of the support frame corresponds to the upper end of the first main inclined strut.

Claims (2)

1. The utility model provides an adopt continuous rigid frame bridge of strength nature skeleton, includes the mound top and connects the roof beam body in mound top both sides, and mound top and roof beam body are reinforced concrete structure, its characterized in that: a pier top stiff skeleton is embedded in the pier top, and the pier top stiff skeleton and a reinforcement cage in the pier top are arranged in a staggered mode; a beam body stiff skeleton is embedded in the beam body, the inner end of the beam body stiff skeleton is fixedly connected with the pier top stiff skeleton to form an integral structure, the outer end of the beam body stiff skeleton extends to the closure section of the beam body, and the beam body stiff skeleton and a reinforcement cage in the beam body are arranged in a staggered mode; the single beam body stiff skeleton consists of a plurality of skeleton sections, and the plurality of skeleton sections are arranged along the beam body in the axial direction;
the single framework section consists of two sets of support structures, and each set of support structure consists of an upper chord member, a lower chord member, an inner web member, an outer web member, an inclined web member, a first main inclined strut and a second main inclined strut; the inner web member and the outer web member are vertically arranged, and the inner web member is closer to the pier top than the outer web member; one end of the upper chord is connected with the upper end of the inner web member, and the other end of the upper chord is connected with the upper end of the outer web member; one end of the lower chord is connected with the lower end of the inner web member, and the other end of the lower chord is connected with the lower end of the outer web member; the joint of the upper chord and the inner web member forms an upper inner contact point, the joint of the upper chord and the outer web member forms an upper outer contact point, the joint of the lower chord and the inner web member forms a lower inner contact point, and the joint of the lower chord and the outer web member forms a lower outer contact point; one end of the diagonal web member is connected with the upper inner contact point, and the other end of the diagonal web member is connected with the lower outer contact point; one end of the first main inclined strut is connected with the middle part of the upper chord member, and the other end of the first main inclined strut is connected with the middle part of the inner web member; one end of the second main inclined strut is connected with the upper external connection point, and the other end of the second main inclined strut is connected with the lower internal connection point; the axial direction of the upper chord is parallel to the axial direction of the beam body; the crossing part of the diagonal web member and the first main diagonal brace is welded and fixed, and the crossing part of the diagonal web member and the second main diagonal brace is welded and fixed;
two sets of support structures governed by a single framework section are transversely distributed along a beam body, upper chords of the two sets of support structures are welded and fixed through a plurality of upper transverse connecting plates, and lower chords of the two sets of support structures are welded and fixed through a plurality of lower transverse connecting plates;
respectively marking three framework sections which are sequentially connected as a framework section I, a framework section II and a framework section III, and setting the framework section I to be closest to the pier top, wherein the inner web rod of the framework section II is the outer web rod of the framework section I, and the outer web rod of the framework section II is the inner web rod of the framework section III;
the two beam body stiff skeleton structures are symmetrical;
the single upper chord member consists of two section steels which are transversely distributed along the beam body, the sections of the section steels are T-shaped, and the top surfaces of the two section steels are welded and fixed through a plurality of steel plates;
the single outer web member consists of two first steel strips, the two first steel strips are transversely distributed along the beam body, the large plane of each first steel strip is parallel to the plane of the web plate of the beam body, and the two first steel strips are welded and fixed through a plurality of steel plates;
the single inner web member consists of two second steel strips, the two second steel strips are transversely distributed along the beam body, the large plane of each second steel strip is parallel to the plane of the web plate of the beam body, and the two second steel strips are welded and fixed through a plurality of steel plates;
the single inclined web member consists of two third steel strips, the two third steel strips are transversely distributed along the beam body, the large plane of each third steel strip is parallel to the plane of the web plate of the beam body, and the two third steel strips are welded and fixed through a plurality of steel plates;
the single first main inclined strut consists of two fourth steel strips, the two fourth steel strips are transversely distributed along the beam body, the large plane of each fourth steel strip is parallel to the plane of the web plate of the beam body, and the two fourth steel strips are welded and fixed through a plurality of steel plates;
the single second main inclined strut consists of two fifth steel plates which are transversely distributed along the beam body, the large plane of each fifth steel plate is parallel to the plane of the web plate of the beam body, and the two fifth steel plates are welded and fixed through a plurality of steel plates;
the single lower chord is a wide-mouth U-shaped section steel.
2. A construction method of a continuous rigid frame bridge adopting a rigid framework comprises a pier top and a beam body connected to two sides of the pier top, wherein the pier top and the beam body are both of a reinforced concrete structure, the pier top rigid framework is embedded in the pier top, and the pier top rigid framework and a reinforcement cage in the pier top are arranged in a staggered mode; a beam body stiff skeleton is embedded in the beam body, the inner end of the beam body stiff skeleton is fixedly connected with the pier top stiff skeleton to form an integral structure, the outer end of the beam body stiff skeleton extends to the closure section of the beam body, and the beam body stiff skeleton and a reinforcement cage in the beam body are arranged in a staggered mode; the single beam body stiff skeleton consists of a plurality of skeleton sections, and the plurality of skeleton sections are arranged along the beam body in the axial direction;
the single framework section consists of two sets of support structures, and each set of support structure consists of an upper chord member, a lower chord member, an inner web member, an outer web member, an inclined web member, a first main inclined strut and a second main inclined strut; the inner web member and the outer web member are vertically arranged, and the inner web member is closer to the pier top than the outer web member; one end of the upper chord is connected with the upper end of the inner web member, and the other end of the upper chord is connected with the upper end of the outer web member; one end of the lower chord is connected with the lower end of the inner web member, and the other end of the lower chord is connected with the lower end of the outer web member; the joint of the upper chord and the inner web member forms an upper inner contact point, the joint of the upper chord and the outer web member forms an upper outer contact point, the joint of the lower chord and the inner web member forms a lower inner contact point, and the joint of the lower chord and the outer web member forms a lower outer contact point; one end of the diagonal web member is connected with the upper inner contact point, and the other end of the diagonal web member is connected with the lower outer contact point; one end of the first main inclined strut is connected with the middle part of the upper chord member, and the other end of the first main inclined strut is connected with the middle part of the inner web member; one end of the second main inclined strut is connected with the upper external connection point, and the other end of the second main inclined strut is connected with the lower internal connection point; the axial direction of the upper chord is parallel to the axial direction of the beam body; the crossing part of the diagonal web member and the first main diagonal brace is welded and fixed, and the crossing part of the diagonal web member and the second main diagonal brace is welded and fixed;
two sets of support structures governed by a single framework section are transversely distributed along a beam body, upper chords of the two sets of support structures are welded and fixed through a plurality of upper transverse connecting plates, and lower chords of the two sets of support structures are welded and fixed through a plurality of lower transverse connecting plates;
respectively marking three framework sections which are sequentially connected as a framework section I, a framework section II and a framework section III, and setting the framework section I to be closest to the pier top, wherein the inner web rod of the framework section II is the outer web rod of the framework section I, and the outer web rod of the framework section II is the inner web rod of the framework section III;
the two beam body stiff skeleton structures are symmetrical;
the single upper chord member consists of two section steels which are transversely distributed along the beam body, the sections of the section steels are T-shaped, and the top surfaces of the two section steels are welded and fixed through a plurality of steel plates;
the single outer web member consists of two first steel strips, the two first steel strips are transversely distributed along the beam body, the large plane of each first steel strip is parallel to the plane of the web plate of the beam body, and the two first steel strips are welded and fixed through a plurality of steel plates;
the single inner web member consists of two second steel strips, the two second steel strips are transversely distributed along the beam body, the large plane of each second steel strip is parallel to the plane of the web plate of the beam body, and the two second steel strips are welded and fixed through a plurality of steel plates;
the single inclined web member consists of two third steel strips, the two third steel strips are transversely distributed along the beam body, the large plane of each third steel strip is parallel to the plane of the web plate of the beam body, and the two third steel strips are welded and fixed through a plurality of steel plates;
the single first main inclined strut consists of two fourth steel strips, the two fourth steel strips are transversely distributed along the beam body, the large plane of each fourth steel strip is parallel to the plane of the web plate of the beam body, and the two fourth steel strips are welded and fixed through a plurality of steel plates;
the single second main inclined strut consists of two fifth steel plates which are transversely distributed along the beam body, the large plane of each fifth steel plate is parallel to the plane of the web plate of the beam body, and the two fifth steel plates are welded and fixed through a plurality of steel plates;
the single lower chord is a wide-mouth U-shaped section steel;
the method is characterized in that: the construction method comprises the steps of pier top manufacturing and beam body manufacturing, wherein after the pier top manufacturing is finished, the beam body manufacturing is carried out;
the pier top manufacturing comprises the following steps:
after the pier column is manufactured, a pier top stiff framework and a pier top steel reinforcement cage are built on the pier column, then a pier top template is manufactured, and then the pier top is poured;
the beam body manufacturing comprises the following steps:
for a single beam body, dividing the single beam body into a No. 1 section, a No. 2 section and a No. 3 section from inside to outside, wherein the plurality of sections correspond to the plurality of framework sections one by one; after the pier top is manufactured, synchronously building framework sections corresponding to the two No. 1 sections on two sides of the pier top, then laying rails on upper chords of the framework sections corresponding to the two No. 1 sections, then building a hanging basket system on the rails corresponding to the two No. 1 sections, then building a beam body reinforcement cage and a template corresponding to the No. 1 section by using the hanging basket system, and then synchronously pouring the two No. 1 sections; then, synchronously building framework sections corresponding to the two No. 2 sections, then laying rails on upper chords of the framework sections corresponding to the two No. 2 sections, respectively moving the two hanging basket systems to the rails corresponding to the two No. 2 sections and stopping, then building a beam body reinforcement cage and a template corresponding to the No. 2 section by using the hanging basket systems, and then synchronously pouring the two No. 2 sections; then, synchronously building framework sections corresponding to the two 3-number sections, then laying tracks on upper chords of the framework sections corresponding to the two 3-number sections, respectively moving the two hanging basket systems to the tracks corresponding to the two 3-number sections and stopping, then building beam body reinforcement cages and templates corresponding to the 3-number sections by using the hanging basket systems, then synchronously pouring the two 3-number sections, then synchronously building framework sections corresponding to the two n-number sections, then laying tracks on the upper chords of the framework sections corresponding to the two n-number sections, respectively moving the two hanging basket systems to the tracks corresponding to the two n-number sections and stopping, then building the beam body cages and templates corresponding to the n-number sections by using the hanging basket systems, and then synchronously pouring the two n-number sections;
the hanging basket system comprises a walking mechanism and a template system; the walking mechanism comprises a supporting frame and four walking wheels; the walking wheels are arranged at the bottom of the support frame, the four walking wheels are distributed in a rectangular shape, the two walking wheels on the left side are in contact with the track on the upper chord on the left side of the framework section, the two walking wheels on the right side are in contact with the track on the upper chord on the right side of the framework section, and the support frame can axially move along the track through the walking wheels; the plane where the four walking wheels are located forms a supporting surface, and the projection of the gravity center of the cradle system on the supporting surface is located in the middle of the area surrounded by the four walking wheels; the template system is hoisted on the support frame through a plurality of hoisting rods; the framework section and the beam body reinforcement cage are positioned in an inner cavity of the template system; the distance between the walking wheels at the front end of the support frame and the walking wheels at the rear end of the support frame in the axial direction of the framework section is marked as B, and the size of B can be adjusted; in the single-set supporting structure, the distance between the upper end of the first main inclined strut and the upper end of the second main inclined strut is marked as A, and B is equal to A; when the cradle system is parked, the position of the walking wheel at the front end of the support frame corresponds to the upper end of the second main inclined strut, and the position of the walking wheel at the rear end of the support frame corresponds to the upper end of the first main inclined strut.
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