CN112267369A - Non-span upright post steel trestle structure, pushing installation device and construction method - Google Patents
Non-span upright post steel trestle structure, pushing installation device and construction method Download PDFInfo
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- CN112267369A CN112267369A CN202011121971.3A CN202011121971A CN112267369A CN 112267369 A CN112267369 A CN 112267369A CN 202011121971 A CN202011121971 A CN 202011121971A CN 112267369 A CN112267369 A CN 112267369A
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- E—FIXED CONSTRUCTIONS
- E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
- E01D—CONSTRUCTION OF BRIDGES, ELEVATED ROADWAYS OR VIADUCTS; ASSEMBLY OF BRIDGES
- E01D15/00—Movable or portable bridges; Floating bridges
- E01D15/12—Portable or sectional bridges
- E01D15/133—Portable or sectional bridges built-up from readily separable standardised sections or elements, e.g. Bailey bridges
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- E—FIXED CONSTRUCTIONS
- E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
- E01D—CONSTRUCTION OF BRIDGES, ELEVATED ROADWAYS OR VIADUCTS; ASSEMBLY OF BRIDGES
- E01D19/00—Structural or constructional details of bridges
- E01D19/005—Piers, trestles, bearings, expansion joints or parapets specially adapted for portable or sectional bridges
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- E—FIXED CONSTRUCTIONS
- E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
- E01D—CONSTRUCTION OF BRIDGES, ELEVATED ROADWAYS OR VIADUCTS; ASSEMBLY OF BRIDGES
- E01D21/00—Methods or apparatus specially adapted for erecting or assembling bridges
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- E—FIXED CONSTRUCTIONS
- E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
- E01D—CONSTRUCTION OF BRIDGES, ELEVATED ROADWAYS OR VIADUCTS; ASSEMBLY OF BRIDGES
- E01D21/00—Methods or apparatus specially adapted for erecting or assembling bridges
- E01D21/06—Methods or apparatus specially adapted for erecting or assembling bridges by translational movement of the bridge or bridge sections
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Abstract
The invention provides a non-midspan upright post steel trestle structure, a pushing installation device and a construction method, wherein the pushing installation device is utilized to perform pushing to complete construction of a steel trestle, the steel trestle structure is convenient and quick, the construction difficulty is reduced, the steel trestle structure is suitable for a thin riverway planting soil layer and a pebble environment at the bottom of a river, the steel trestle structure comprises a trestle abutment, a trestle support, a bearing beam, a longitudinal beam, a distribution beam and a bridge deck, the trestle support comprises two groups of trapezoidal steel pipe supports, each steel pipe support comprises two inclined rods, a main upright rod, an auxiliary upright rod, an upper horizontal rod and a lower horizontal rod, the bearing beam is arranged above the upper horizontal rod along the transverse bridge direction, the longitudinal beam is arranged above the bearing beam along the longitudinal direction, two ends of the longitudinal beam are arranged on the trestle, the ends of the longitudinal beam are limited and fixed through a back wall, a plurality of distribution beams are arranged above the, Establish through welded connection between main pole setting, supplementary pole setting, horizon bar, the horizontal pole, connect through the bracket between main pole setting and the spandrel girder.
Description
Technical Field
The invention relates to the technical field of bridge trestle construction, in particular to a non-span upright post steel trestle structure, a pushing installation device and a construction method.
Background
In the actual construction process of the steel trestle, a plurality of unpredictable problems exist, such as large change of geological layers of a river channel, hard soil at the bottom of a partial section of the river, and the penetration depth of a pipe pile foundation must meet the design requirements; or when a riverway planting soil layer is thin and pebbles exist at the bottom of a river, if the lower structure is supported by the steel pipe piles, the steel pipe piles are shallow in soil, so that the bench piles are needed, the construction cost is high, uncontrollable factors are more, the construction period is long, the rapid construction cannot be realized, and the requirements of economy, applicability and environmental protection and conservation are not met.
Disclosure of Invention
The invention provides a non-span center column steel trestle structure, a pushing installation device and a construction method, which are quick and convenient to construct, low in cost, stable and reliable.
The technical scheme of the invention is as follows: a non-span middle upright post steel trestle structure comprises a trestle abutment, a trestle support, a bearing beam, a longitudinal beam, a distribution beam and a bridge deck, wherein the trestle abutment comprises an enlarged foundation embedded below the ground, a body and a back wall which are sequentially arranged on the enlarged foundation, the trestle support comprises two groups of trapezoidal steel pipe supports, each steel pipe support comprises two inclined rods, a main vertical rod, an auxiliary vertical rod and a horizontal rod, each horizontal rod comprises an upper horizontal rod and a lower horizontal rod, the length of the upper horizontal rod is shorter than that of the lower horizontal rod, one end of each inclined rod is fixed on the trestle body, the other end of each inclined rod is connected with the upper horizontal rod, two ends of each lower horizontal rod are anchored in the trestle body, the main vertical rod is arranged between the upper horizontal rod and the lower horizontal rod, the auxiliary vertical rod is arranged between the inclined rods and the lower horizontal rod, the bearing beam is arranged above the upper horizontal rod along the transverse direction, the longitudinal beam is arranged above the bearing beam, both ends set up on the platform body, and the end is spacing fixed through the back wall, longeron top is along horizontal bridge to setting up a plurality of distribution roof beams, the distribution roof beam top sets up the decking.
Furthermore, the bridge deck is divided into a traffic flow channel and a pedestrian channel, the pedestrian channel is arranged on two sides of the traffic flow channel, and guard rails are arranged between the traffic flow channel and the pedestrian channel and on the outermost side of the bridge deck.
Furthermore, the longitudinal beams comprise 3 groups of parallel Bailey beams, flower stands used as transverse connection and connecting systems among the Bailey beams, and the Bailey beams are arranged in parallel along the longitudinal bridge direction.
And furthermore, cross rods are arranged between the steel pipe supports and are connected with the two groups of steel pipe supports to be in transverse connection.
Further, the number of the cross bars is 6.
Further, establish through welded connection between down tube, main pole setting, assistance pole setting, horizon bar, the horizontal pole, connect through the bracket between main pole setting and the spandrel girder, the bracket is made by the steel plate, and the symmetry sets up in the tie point both sides.
Furthermore, a stop block is arranged on the expansion foundation, a gap is reserved between the stop block and the platform body, and the inclined rod is fixed and positioned through the stop block.
Further, the bottom of the distribution beam is fixedly connected with the upper part of the longitudinal beam through a riding bolt.
On the other hand, the invention provides a non-span center upright post steel trestle jacking installation device which comprises a hand hoist, a walking track, a jacking mechanism, a limiting mechanism and a back pressure bailey beam mechanism, wherein the walking track comprises a walking track I arranged on a platform body and a road surface and a walking track II arranged above a bearing beam, the walking track I comprises an I-steel I arranged along a longitudinal bridge direction and a plurality of rolling steel pipes arranged along a transverse bridge direction, the rolling steel pipes and the I-steel I are vertically arranged, the walking track II comprises an I-steel II arranged along the longitudinal bridge direction and a sliding plate arranged on the I-steel II, the sliding plate is formed by reversely buckling channel steel, the limiting mechanism comprises a limiting mechanism I arranged on the second backward section on the inner side of the back pressure bailey beam, a limiting mechanism II pre-embedded on the platform body and a limiting mechanism III arranged on two sides of the sliding plate, the hand hoist is arranged on the limiting mechanism II and connected with the bailey beam through a steel wire rope, the jacking mechanism comprises a jack I arranged on the platform body, a jack II arranged on the bearing beam and a jacking plate arranged above the jack I and the jack II, the back pressure Bailey beam mechanism is a U-shaped frame, the back pressure Bailey beam mechanism is arranged on the Bailey beam in a back buckling mode, and the bottom of the back pressure Bailey beam mechanism is fixed with the platform body.
Furthermore, the limiting mechanism I and the limiting mechanism II are both made of channel steel, and the limiting mechanism III is made of steel bars.
Further, a layer of butter is smeared between the I-steel II and the sliding plate to reduce sliding friction.
In another aspect, the invention provides a construction method of a non-span center column steel trestle, which comprises the following steps:
s1: constructing a trestle abutment, wherein the trestle abutment is divided into an enlarged foundation, an abutment body and a back wall, the enlarged foundation, the abutment body and the back wall are poured in a grading manner, the enlarged foundation is embedded below the original surface, the abutment body and the back wall are sequentially poured above the enlarged foundation, and a stop block is arranged on the abutment body;
s2: the trestle support construction method comprises the following steps that a trestle support is constructed, each trestle support is formed by combining two trapezoidal steel pipe supports, each steel pipe support comprises two inclined rods, an upper horizontal rod, a lower horizontal rod, two main vertical rods and two auxiliary vertical rods, the two steel pipe supports are transversely connected through a transverse rod, the inclined rods are fixedly connected with a platform body, the steel pipe supports are firstly spliced on the land during construction, the assembled steel pipe supports are hoisted to the design position of a stop block 11 of the platform body, and then transverse connection welding of the transverse rods is carried out;
s3: constructing a main upright stanchion top load-bearing beam, after the transverse connection is finished, performing position lofting on a load-bearing beam and brackets on the main upright stanchion, wherein the brackets are distributed on two sides of the main upright stanchion along the length direction of the load-bearing beam and are composed of two steel plates with the distance of 5 cm;
s4: the longitudinal beam is installed and consists of 3 groups of Bailey beams, all the sections of Bailey beams are connected through flower stands, all the groups of Bailey beams are connected through connecting systems, the Bailey beam is arranged above the bearing beam, the Bailey beam is constructed through the pushing and mounting device, the pushing and mounting device is mounted at a corresponding position, when the first-stage pushing is close to the side span of one side of the hand hoist, the maximum length of the cantilevered Bailey beam is 15 meters, the Bailey beam with the length of 18 meters is adopted for back pressure, a limiting mechanism I is arranged at the position of the penultimate section at the inner side of the back pressure Bailey beam to prevent the Bailey beam from being separated from the walking track I, when the second-stage pushing is far away from the side span at one side of the hand hoist, the longest length of the cantilever bailey beam is 15 meters, 24 meters bailey beam is adopted for back pressure, in the third stage, after the bailey beam is pushed in place, dismounting the pushing mounting device step by step, and then mounting and fixing the Bailey beam of the next section of the steel trestle;
s5: the distributing beam and the bridge deck are installed, the distributing beam is hoisted above the Bailey beam by a crane, a riding bolt is arranged at the bottom of the distributing beam and is connected with the upper chords of the two rows of Bailey beams on the outermost side through the riding bolt, after the distributing beam is installed, the bridge deck is fully paved along the longitudinal direction of the trestle and is welded with the lap joint position of the distributing beam, after the bridge deck is paved, the crane moves forwards to install the distributing beam and the bridge deck in the next area, and the area where the bridge deck is installed is closely followed by the installation work of the guard railing.
Further, in step S1, shear-resistant steel bars are vertically embedded in the contact sections of the enlarged foundation and the platform body, and the platform body and the back wall, the steel bars are arranged in the transverse bridge direction and the longitudinal bridge direction and anchored in the upper and lower layers of concrete, and when the platform body is poured in different times, the shear-resistant steel bars are also arranged on the two pouring sections.
Furthermore, the step S2 includes local reinforcement of the steel tube, and C20 concrete is poured into the end portion of the diagonal rod and the connecting portion of the main vertical rod and the upper horizontal rod to protect the steel tube from being damaged.
Further, the dismounting of the pushing and mounting device in the step S4 includes firstly, using a jack ii on a bearing beam on one side far away from the hand hoist to jack the bailey beam away from the walking track ii, comprehensively checking whether the bailey beam and the jack ii are all normal, secondly, using a jack i on the platform body to separate the back pressure bailey beam from the rolling steel pipe, dismounting the hand hoist after confirming safety, thirdly, lowering the jack i and the jack ii simultaneously, paying attention to observing states of the bailey beam and the jack in the process until the bailey beam falls on the platform body and the bearing beam safely, fourthly, rechecking a plane position of the bailey beam, dismounting the back pressure bailey beam mechanism after confirming no fault, fifthly, using channel steel to fix the bailey beam on the bearing beam, and analogizing the method to finish mounting and fixing all the bailey beams of the steel trestle bridge.
The invention has the advantages that: according to the invention, through the construction of the steel trestle without the cross-center upright post, the steel pipe support is used as the support frame on the basis of meeting the requirements of bearing and stability, the cost and the construction operation difficulty are reduced, the construction period is shortened, and an efficient and rapid mode is provided for the construction of the steel trestle.
Drawings
FIG. 1 is a schematic cross-sectional view of a steel trestle structure without a cross-center column according to the present invention;
FIG. 2 is a schematic longitudinal section of a steel trestle structure without a cross-center column according to the present invention;
FIG. 3 is a top view of a steel trestle structure without a cross-center column according to the present invention;
FIG. 4 is a schematic diagram of a Bailey beam construction stage in the construction method of the non-span middle column steel trestle;
FIG. 5 is a schematic diagram of a Bailey beam construction stage II in the construction method of the non-span middle upright post steel trestle;
FIG. 6 is a schematic diagram of a Bailey beam construction stage in the construction method of the non-span middle column steel trestle;
FIG. 7 is a schematic cross-sectional view A-A of a non-span center column steel trestle construction method of the invention;
FIG. 8 is a schematic cross-sectional view B-B in the construction method of the non-span center column steel trestle of the invention;
FIG. 9 is a schematic cross-sectional view of C-C in a construction method of a non-span center column steel trestle of the invention;
FIG. 10 is a schematic cross-sectional view of a cross-free column steel trestle in a construction method of the invention;
FIG. 11 is a schematic cross-sectional view of an E-E section in a construction method of a non-span center column steel trestle of the invention;
FIG. 12 is a schematic view of a U-shaped clip of a non-span center column steel trestle structure according to the present invention.
Detailed Description
The present invention will now be described more fully hereinafter with reference to the accompanying drawings, in which a person skilled in the art can, without any creative effort, fully implement the present invention.
As shown in fig. 1-12, a non-span middle column steel trestle structure comprises a trestle abutment, a trestle support 1, a bearing beam 4, a longitudinal beam 5, a distribution beam 6 and a bridge deck 7, wherein the trestle abutment comprises an enlarged foundation 9 embedded below the ground, a trestle body 10 and a back wall 12 which are sequentially arranged on the enlarged foundation 9, the trestle support 1 comprises two groups of trapezoidal steel pipe supports, each steel pipe support comprises two inclined rods 1-1, a main upright rod 1-4, an auxiliary upright rod 1-3 and a horizontal rod, each horizontal rod comprises an upper horizontal rod 1-5 and a lower horizontal rod 1-2, the length of the upper horizontal rod 1-5 is shorter than that of the lower horizontal rod 1-2, one end of each inclined rod 1-1 is fixed on the trestle body 10, the other end of each inclined rod is connected with the upper horizontal rod 1-5, and two ends of the lower anchoring horizontal rod 1-2 are arranged in the trestle body 10, the main upright rods 1-4 are arranged between the upper horizontal rods 1-5 and the lower horizontal rods 1-2, the auxiliary upright rods 1-3 are arranged between the inclined rods 1-1 and the lower horizontal rods 1-2, the bearing beam 4 is arranged above the upper horizontal rods 1-5 in the transverse bridge direction, the longitudinal beam 5 is longitudinally arranged above the bearing beam 4, two ends of the longitudinal beam are arranged on the platform body 10, the end heads of the longitudinal beam are fixed in a limiting manner through back walls 12, a plurality of distributing beams 6 are arranged above the longitudinal beam 5 in the transverse bridge direction, and bridge decks 7 are arranged above the distributing beams 6.
Further, the bridge deck 7 is divided into a traffic flow channel 13 and a pedestrian channel 14, the pedestrian channel 14 is arranged on two sides of the traffic flow channel 13, and guard rails 8 are arranged between the traffic flow channel 13 and the pedestrian channel 14 and on the outermost side of the bridge deck 7.
Further, the longitudinal beams 5 comprise 3 groups of parallel Bailey beams, flower stands used as transverse connection and connecting systems among the Bailey beams, and the Bailey beams are arranged in parallel along the longitudinal bridge direction.
Further, a cross rod 2 is arranged between the steel pipe supports, and the cross rod 2 is connected with the two groups of steel pipe supports to be in transverse connection.
Further, the number of the cross bars 2 is 6.
Furthermore, welded connections are arranged among the inclined rods 1-1, the main vertical rods 1-4, the auxiliary vertical rods 1-3, the horizontal rods and the cross rods 6, the main vertical rods 1-4 and the bearing beams 4 are connected through the brackets 3, the brackets 3 are made of thick steel plates and are symmetrically arranged on two sides of the connecting points.
Furthermore, a stop block 11 is arranged on the enlarged foundation 9, a gap is reserved between the stop block 11 and the platform body 10, and the inclined rod 1-1 is fixed and positioned through the stop block 11.
Further, the bottom of the distribution beam 6 is fixedly connected with the upper part of the longitudinal beam 5 through a riding bolt 25.
On the other hand, the invention provides a non-span center upright post steel trestle jacking installation device, which comprises a hand hoist, a walking track, a jacking mechanism, a limiting mechanism and a back pressure bailey beam mechanism, wherein the walking track comprises a walking track I arranged on a platform body and a road surface and a walking track II arranged above a bearing beam 4, the walking track I comprises I-shaped steel I17 arranged along a longitudinal bridge direction and a plurality of rolling steel pipes 16 arranged along a transverse bridge direction, the rolling steel pipes 16 and the I-shaped steel I17 are vertically arranged, the walking track II comprises I-shaped steel II 19 arranged along the longitudinal bridge direction and a sliding plate 20 arranged on the I-shaped steel II 19, the sliding plate 20 is formed by reversely buckling channel steel, the limiting mechanism comprises a limiting mechanism I15 arranged on the second section from the back to the inner side of the back pressure bailey beam, a limiting mechanism II 18 pre-embedded on the platform body and limiting mechanisms III arranged on two sides of the sliding plate 20, hand block sets up and is connected through wire rope 23 and bailey roof beam on stop gear II 18, climbing mechanism is including setting up jack I21 on platform body 10, setting up jack II 24 on spandrel girder 4, setting up at jack I21 and jack II 24 top jacking board 22, backpressure bailey roof beam mechanism is U type frame, and the left-hand thread sets up on bailey roof beam, and the bottom is fixed with the platform body.
Furthermore, the limiting mechanism I15 and the limiting mechanism II 18 are both made of channel steel, and the limiting mechanism III is made of steel bars.
Further, a layer of grease is smeared between the I-steel II 19 and the sliding plate 20 to reduce sliding friction.
In another aspect, the invention provides a construction method of a non-span center column steel trestle, which comprises the following steps:
s1: constructing a trestle abutment, wherein the trestle abutment is divided into an enlarged foundation 9, a body 10 and a back wall 12, the enlarged foundation 9, the body 10 and the back wall 12 are poured in a grading manner, the enlarged foundation 9 is embedded below the original ground, the body 10 and the back wall 12 are sequentially poured above the enlarged foundation, and a stop block 11 is arranged on the body 10;
s2: the trestle support 1 is constructed, the trestle support 1 is formed by combining two trapezoidal steel pipe supports, each steel pipe support comprises two inclined rods 1-1, an upper horizontal rod 1-5, a lower horizontal rod 1-2, two main vertical rods 1-4 and two auxiliary vertical rods 1-3, the two steel pipe supports are made of steel pipes and are in transverse connection with each other through 6 transverse rods 2, the inclined rods 1-1 and the platform body 10 are solidified, during construction, the steel pipe supports are firstly spliced on land, then the assembled steel pipe supports are hoisted to the design position of a stop block 11 of the platform body 10, and then the transverse connection welding of the transverse rods 2 is carried out;
s3: constructing a main upright stanchion 1-4 top load-bearing beam 4, after the transverse connection is finished, performing position lofting on a load-bearing beam 4 and a bracket 3 on the main upright stanchion 1-4, wherein the bracket is distributed on two sides of the main upright stanchion 1-4 along the length direction of the load-bearing beam 4 and consists of two steel plates with the distance of 5 cm;
s4: the longitudinal beam 5 is installed, the longitudinal beam 5 is composed of 3 groups of Bailey beams, all sections of Bailey beams are connected through flower stands, all groups of Bailey beams are connected through connecting systems, the connecting systems are made of angle steel, the Bailey beams are installed above the bearing beams 4 and are constructed through the pushing installation devices, the pushing installation devices are installed at corresponding positions, when the pushing of the first stage is close to the side span of one side of the hand hoist, the maximum overhanging Bailey beam is 15 meters, the Bailey beam is adopted for back pressure, a limiting mechanism I15 is placed at the position which is the penultimate part of the inner side of the back pressure Bailey beam, the Bailey beam is prevented from being separated from the walking track I, when the pushing of the second stage is far away from the side span of one side of the hand hoist, the maximum overhanging Bailey beam is 15 meters, the Bailey beam is adopted for back pressure of 24 meters, and when the Bailey beam is pushed in place at the third stage, the pushing installation devices are dismantled step by step, and then, Fixing;
s5: the distributing beam 6 and the bridge deck 7 are installed, the distributing beam 6 is hoisted above the Bailey beam by a crane, a riding bolt 25 is arranged at the bottom of the distributing beam, the distributing beam is connected with two rows of upper chords of the Bailey beam on the outermost side by the riding bolt 25, after the distributing beam 6 is installed, the bridge deck 7 is fully paved along the longitudinal direction of the trestle and welded with the lapping position of the distributing beam 6, after the bridge deck 7 is paved, the crane moves forward to carry out the installation of the distributing beam 6 and the bridge deck 7 in the next area, and the area where the bridge deck 7 is installed is closely followed by the installation work of the guard railing 8.
Further, in step S1, shear reinforcement bars are vertically embedded in the contact cross section between the enlarged foundation 9 and the platform body 10, and between the platform body 10 and the back wall 12, the reinforcement bars are arranged in the transverse and longitudinal bridge directions and anchored in the upper and lower layers of concrete, and when the platform body 10 is poured in different times, the shear reinforcement bars are also arranged on the two pouring cross sections.
Furthermore, the step S2 also includes local reinforcement of the steel pipe, and C20 concrete is poured at the end part of the diagonal rod 1-1 and the connecting part of the main vertical rod 1-4 and the upper horizontal rod 1-5 to protect the steel pipe from being damaged.
Further, the dismounting of the pushing installation device in the step S4 includes firstly, using a jack ii 24 on a bearing beam on one side far away from the hand hoist to lift the bailey beam away from the traveling track ii, comprehensively checking whether the bailey beam and the jack ii 24 are all normal, secondly, using a jack i 21 on the platform body 10 to lift the back pressure bailey beam away from the rolling steel pipe 16, dismounting the hand hoist after confirming safety, thirdly, lowering the jack i 21 and the jack ii 24 simultaneously, paying attention to observing states of the bailey beam and the jacking mechanism in the process until the bailey beam falls onto the platform body 10 and the bearing beam 4 safely, fourthly, rechecking a plane position of the bailey beam, dismounting the back pressure bailey beam mechanism after confirming no fault, fifthly, fixing the bailey beam on the bearing beam 4 by using channel steel to perform channel back pressure, and so on the mounting and fixing of all the bailey beams of the steel trestle.
While the preferred embodiments of the invention have been described, it is to be understood that the invention is not limited to the precise embodiments described, and that equipment and structures not described in detail are understood to be practiced as commonly known in the art; any simple modification, equivalent change and modification of the above embodiments according to the technical essence of the present invention by those skilled in the art can be made without departing from the technical scope of the present invention, and still fall within the protection scope of the technical solution of the present invention.
Claims (10)
1. A non-span middle upright post steel trestle structure is characterized by comprising a trestle abutment, trestle supports, a bearing beam, longitudinal beams, a distribution beam and a bridge deck, wherein the trestle abutment comprises an enlarged foundation embedded below the ground, a body and a back wall which are sequentially arranged on the enlarged foundation, the trestle supports comprise two groups of trapezoidal steel pipe supports, cross rods are arranged between the steel pipe supports, the cross rods are connected with the two groups of steel pipe supports as transverse connection, the steel pipe supports comprise two inclined rods, a main vertical rod, an auxiliary vertical rod and a horizontal rod, the horizontal rod comprises an upper horizontal rod and a lower horizontal rod, the length of the upper horizontal rod is shorter than that of the lower horizontal rod, one end of each inclined rod is fixed on the trestle body, the other end of each inclined rod is connected with the upper horizontal rod, two ends of the lower horizontal rod are anchored in the trestle body, the main vertical rod is arranged between the upper horizontal rod and the lower horizontal rod, the auxiliary vertical rod is arranged between the inclined rod, the utility model discloses a bridge structure, including spandrel girder, longeron, quarter beam, main pole setting, supplementary pole setting, horizon bar, horizontal pole, bracket, corbel, the bearing beam sets up in the upper horizontal pole top along the cross bridge to the direction setting, the longeron sets up in the top of spandrel girder along vertical setting, and both ends setting is on the platform body, and the end passes through the spacing fixed of back of the body wall, the longeron top is along the cross bridge to setting up a plurality of distribution roof beams, the distribution roof beam top sets up the decking, establish through welded connection between down tube, main pole setting, the assistance pole setting, horizon bar, the horizontal pole.
2. The midspan column-free steel trestle structure according to claim 1, wherein the bridge deck is divided into a traffic flow channel and a pedestrian channel, the pedestrian channel is arranged on two sides of the traffic flow channel, and guard rails are arranged between the traffic flow channel and the pedestrian channel and on the outermost side of the bridge deck.
3. The midspan column-free steel trestle structure according to claim 2, wherein the longitudinal beams comprise 3 groups of Bailey beams arranged in parallel, flower stands used as transverse connection, and connecting systems between the Bailey beams in each group, and the Bailey beams are arranged in parallel along the longitudinal bridge direction.
4. The midspan column-free steel trestle structure according to claim 3, wherein a stopper is arranged on the enlarged foundation, a gap is reserved between the stopper and the platform body, and the inclined rod is fixed and positioned through the stopper.
5. The midspan column-free steel trestle structure according to claim 4, wherein the bottom of the distribution beam is fixedly connected with the upper part of the longitudinal beam through a saddle bolt.
6. A non-span center upright post steel trestle incremental launching installation device is characterized by comprising a hand hoist, a walking track, an incremental launching mechanism, a limiting mechanism and a back pressure bailey beam mechanism, wherein the walking track comprises a walking track I arranged on a platform body and a road surface and a walking track II arranged above a bearing beam, the walking track I comprises an I-steel I arranged along a longitudinal bridge direction and a plurality of rolling steel pipes arranged along a transverse bridge direction, the rolling steel pipes and the I-steel I are vertically arranged, the walking track II comprises an I-steel II arranged along the longitudinal bridge direction and a sliding plate arranged on the I-steel II, the sliding plate is formed by reversely buckling channel steel, the limiting mechanism comprises a limiting mechanism I arranged on the second section backwards on the inner side of the back pressure bailey beam, a limiting mechanism II pre-buried on the platform body and limiting mechanisms III arranged on two sides of the sliding plate, the hand hoist is arranged on the limiting mechanism II and connected with the bailey beam through a steel wire rope, the jacking mechanism comprises a jack I arranged on the platform body, a jack II arranged on the bearing beam and a jacking plate arranged above the jack I and the jack II, the back pressure Bailey beam mechanism is a U-shaped frame, the back pressure Bailey beam mechanism is arranged on the Bailey beam in a back buckling mode, and the bottom of the back pressure Bailey beam mechanism is fixed with the platform body.
7. A construction method of a non-span center column steel trestle is characterized by comprising the following steps:
s1: constructing a trestle abutment, wherein the trestle abutment is divided into an enlarged foundation, an abutment body and a back wall, the enlarged foundation, the abutment body and the back wall are poured in a grading manner, the enlarged foundation is embedded below the original surface, the abutment body and the back wall are sequentially poured above the enlarged foundation, and a stop block is arranged on the abutment body;
s2: the trestle support construction method comprises the following steps that a trestle support is constructed, each trestle support is formed by combining two trapezoidal steel pipe supports, each steel pipe support comprises two inclined rods, an upper horizontal rod, a lower horizontal rod, two main vertical rods and two auxiliary vertical rods, the two steel pipe supports are transversely connected through a transverse rod, the inclined rods are fixedly connected with a platform body, the steel pipe supports are firstly spliced on the land during construction, the assembled steel pipe supports are hoisted to the design position of a stop block 11 of the platform body, and then transverse connection welding of the transverse rods is carried out;
s3: constructing a main upright stanchion top load-bearing beam, after the transverse connection is finished, performing position lofting on a load-bearing beam and brackets on the main upright stanchion, wherein the brackets are distributed on two sides of the main upright stanchion along the length direction of the load-bearing beam and are composed of two steel plates with the distance of 5 cm;
s4: the longitudinal beam is installed and consists of 3 groups of Bailey beams, all the sections of Bailey beams are connected through flower stands, all the groups of Bailey beams are connected through connecting systems, the Bailey beam is arranged above the bearing beam, the Bailey beam is constructed through the pushing and mounting device, the pushing and mounting device is mounted at a corresponding position, when the first-stage pushing is close to the side span of one side of the hand hoist, the maximum length of the cantilevered Bailey beam is 15 meters, the Bailey beam with the length of 18 meters is adopted for back pressure, a limiting mechanism I is arranged at the position of the penultimate section at the inner side of the back pressure Bailey beam to prevent the Bailey beam from being separated from the walking track I, when the second-stage pushing is far away from the side span at one side of the hand hoist, the longest length of the cantilever bailey beam is 15 meters, 24 meters bailey beam is adopted for back pressure, in the third stage, after the bailey beam is pushed in place, dismounting the pushing mounting device step by step, and then mounting and fixing the Bailey beam of the next section of the steel trestle;
s5: the distributing beam and the bridge deck are installed, the distributing beam is hoisted above the Bailey beam by a crane, a riding bolt is arranged at the bottom of the distributing beam and is connected with the upper chords of the two rows of Bailey beams on the outermost side through the riding bolt, after the distributing beam is installed, the bridge deck is fully paved along the longitudinal direction of the trestle and is welded with the lap joint position of the distributing beam, after the bridge deck is paved, the crane moves forwards to install the distributing beam and the bridge deck in the next area, and the area where the bridge deck is installed is closely followed by the installation work of the guard railing.
8. The method of claim 7, wherein in step S1, shear-resistant steel bars are embedded vertically in the contact sections between the enlarged foundation and the platform body, and between the platform body and the back wall, the steel bars are arranged in the transverse and longitudinal bridge directions and anchored in the upper and lower layers of concrete, and when the platform body is poured in different times, the shear-resistant steel bars are also arranged in the two pouring sections.
9. The method of claim 7, wherein the step S2 further comprises reinforcing the steel tubes partially, and pouring C20 concrete at the ends of the diagonal rods and the connecting portions between the main vertical rods and the upper horizontal rods to protect the steel tubes from being damaged.
10. The construction method of a steel trestle without a midspan upright post as claimed in claim 7, wherein the step S4 of removing the pushing installation device comprises the steps of firstly, using a jack II on a bearing beam far away from a hand hoist to push the Bailey beam away from a walking track II, comprehensively checking whether the Bailey beam and the jack II are all normal, secondly, using a jack I on a platform body to push the Bailey beam away from a rolling steel pipe, dismantling the hand hoist after the Bailey beam is confirmed to be safe, thirdly, lowering the jack I and the jack II simultaneously, observing the state of the Bailey beam and the jack during the process until the Bailey beam falls onto the platform body and the bearing beam safely, fourthly, rechecking the plane position of the Bailey beam, dismantling the Bailey beam mechanism after the Bailey beam is confirmed to be correct, fifthly, fixing the Bailey beam on the bearing beam by using channel steel backpressure, and analogizing the installation of the Bailey beams of the steel trestle bridge according to the method, And (5) fixing.
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN113699892A (en) * | 2021-08-27 | 2021-11-26 | 江苏山水环境建设集团股份有限公司 | Construction method of non-column light steel beam landscape trestle |
| CN113699894A (en) * | 2021-09-27 | 2021-11-26 | 中国能源建设集团安徽电力建设第一工程有限公司 | Construction method of complicated navigation water area widening and height changing steel box girder support system |
| CN114319079A (en) * | 2022-01-14 | 2022-04-12 | 江苏沪宁钢机股份有限公司 | Upper and lower double-layer steel bridge girder falling structure of highway bridge and railway bridge and girder falling method thereof |
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- 2020-10-20 CN CN202011121971.3A patent/CN112267369A/en active Pending
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113699892A (en) * | 2021-08-27 | 2021-11-26 | 江苏山水环境建设集团股份有限公司 | Construction method of non-column light steel beam landscape trestle |
| CN113699894A (en) * | 2021-09-27 | 2021-11-26 | 中国能源建设集团安徽电力建设第一工程有限公司 | Construction method of complicated navigation water area widening and height changing steel box girder support system |
| CN114319079A (en) * | 2022-01-14 | 2022-04-12 | 江苏沪宁钢机股份有限公司 | Upper and lower double-layer steel bridge girder falling structure of highway bridge and railway bridge and girder falling method thereof |
| CN114319079B (en) * | 2022-01-14 | 2023-08-01 | 江苏沪宁钢机股份有限公司 | Double-deck steel bridge girder falling structure and girder falling method for highway bridge and railway bridge |
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