CN113832862B - Construction method of assembled steel trestle - Google Patents
Construction method of assembled steel trestle Download PDFInfo
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- CN113832862B CN113832862B CN202111200078.4A CN202111200078A CN113832862B CN 113832862 B CN113832862 B CN 113832862B CN 202111200078 A CN202111200078 A CN 202111200078A CN 113832862 B CN113832862 B CN 113832862B
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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
- E01D21/10—Cantilevered erection
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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
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D5/00—Bulkheads, piles, or other structural elements specially adapted to foundation engineering
- E02D5/22—Piles
- E02D5/24—Prefabricated piles
- E02D5/28—Prefabricated piles made of steel or other metals
- E02D5/285—Prefabricated piles made of steel or other metals tubular, e.g. prefabricated from sheet pile elements
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Abstract
The invention discloses a construction method of an assembled steel trestle, which is used for completing the installation and construction of a Bailey piece assembling frame with a first span of a preset length, wherein an upper positioning frame is arranged on the upper surface of a preset position of the Bailey piece assembling frame, and a lower positioning frame is arranged at a corresponding position on the lower surface of the Bailey piece assembling frame and is connected with the upper positioning frame; inserting and driving the steel pipe piles by using the upper positioning frame and the lower positioning frame, sinking the lower positioning frame to the bottom and fixing, mounting a counterweight on the upper part of the lower positioning frame, and mounting a support frame between the adjacent steel pipe piles; cutting off steel pipe piles with preset sizes, installing cap beams on each group of steel pipe piles in the length direction of the steel trestle, installing carrying pole beams on the cap beams in the width direction of the steel trestle, removing the upper positioning frame, fixing the bailey piece assembling frame, and paving transverse distribution beams and bridge deck steel plates on the bailey piece assembling frame; and the bailey piece assembling frame with the preset length is connected along the next span arrangement direction. The invention can effectively and quickly strengthen the integrity and stability of the bottom support system during the construction of the steel trestle.
Description
Technical Field
The invention belongs to the technical field of water transport engineering construction, and particularly relates to a construction method of an assembled steel trestle.
Background
At present the construction of aquatic municipal administration bridge, need installation steel trestle and operation platform in order to satisfy the construction demand, adopt floating crane on water or heavy machinery to adopt the fishing method construction more, steel trestle basis need have certain bearing layer just can guarantee that the basis is stable. If the steel trestle without the bearing stratum bare rock foundation is installed, a water ship needs to be adopted for hole leading, the construction operation difficulty is high, the construction period is long, the water ship is particularly needed to be matched for construction, potential safety hazards exist when operating personnel and ships operate under the condition of rapid water flow, the operation personnel and the ships are easily influenced by stormy waves and water depth, and the construction precision is difficult to guarantee.
The existing construction method of the steel trestle comprises two groups of supporting beams which are longitudinally arranged along the trestle, at least one cross beam which is transversely fixed on the top surfaces of the two groups of supporting beams along the trestle, at least two pairs of guide frames, a pair of height-adjustable supporting legs which are arranged on the bottom surfaces of the supporting beams, and a pair of guide frames which are oppositely arranged on the two groups of supporting beams. The guide frame comprises a pair of guide plates which are horizontally arranged and vertically arranged, each guide plate is provided with a guide hole which is vertically communicated, the guide plate positioned above the pair of guide plates is fixed on the pair of first cross rods, and the guide plate positioned below the pair of guide plates is fixed on the pair of second cross beams. In the construction process of the steel trestle, after the steel pipe piles are driven, pile caps are removed by a crane, and then the piles are dismantled according to the reverse order of installation of the guide frame. According to the method, when the steel pipe pile is used for constructing the steel trestle under the conditions of large water flow, deep river water and particularly under the environment of no bearing stratum and taking bare rock as a foundation, the bottom of the steel pipe pile cannot be quickly and stably supported, certain safety risks exist, the steel pipe pile bottom support is constructed subsequently, the process is complex, and the construction time of operators in deep water is long, and certain safety risks exist.
Disclosure of Invention
In order to solve the problems in the prior art and meet the requirements of corresponding environments, the invention mainly provides a construction method of an assembly type steel trestle, which can effectively and quickly improve the integrity and stability of the bottom of a steel pipe pile.
In order to achieve the purpose, the construction method of the assembly type steel trestle provided by the invention comprises the following steps:
the method comprises the following steps: the installation construction and fixation of the bridge abutment and the Bailey piece assembling frame which firstly spans the first preset length at the bridge abutment are completed, the upper surface of the Bailey piece assembling frame at the preset position is detachably and fixedly provided with an upper positioning frame, the lower surface of the Bailey piece assembling frame and the position corresponding to the upper positioning frame are detachably and fixedly provided with a lower positioning frame, and the upper positioning frame and the lower positioning frame are detachably and fixedly connected by using a fastener;
step two: inserting the steel pipe piles into the positioning holes correspondingly formed in the upper positioning frame and the lower positioning frame, vibrating and sinking the steel pipe piles to a preset position, sinking the lower positioning frame to the bottom and fixing, installing a counterweight with preset weight on the upper surface of the lower positioning frame, and installing a support frame between the adjacent steel pipe piles;
step three: cutting off steel pipe piles of a first preset size on the water surface, fixedly mounting cap beams of a second preset size on each group of steel pipe piles in the length direction of the steel trestle, fixedly mounting shoulder pole beams of a third preset size on the cap beams in the width direction of the steel trestle, removing an upper locating frame, dismantling a bailey piece assembly frame of a preset length at a bridge abutment, carrying out fixed construction on the rest bailey piece assembly frame, and laying a transverse distribution beam and a bridge deck steel plate on the bailey piece assembly frame to complete construction of a corresponding span section;
step four: connecting a Bailey piece assembling frame with a third preset length along the arrangement direction of the next span to carry out construction of the next span, detachably and fixedly mounting an upper positioning frame on the upper surface of the preset position of the Bailey piece assembling frame, and detachably and fixedly mounting a lower positioning frame on the lower surface of the position, corresponding to the upper positioning frame, of the Bailey piece assembling frame;
step five: and repeating the second step to the fourth step until the planned installation of the length of the steel trestle is finished.
Preferably, the support is a scissor support.
Preferably, the sizes of the welding feet of the upper positioning frame and the lower positioning frame are both larger than or equal to 8mm.
It is from top to bottom visible, at the in-process of steel trestle installation, the steel-pipe pile location is inserted and is beaten the back that finishes, lower locating rack sinks to smooth riverbed surface and fixed, install scissors formula support frame between the adjacent steel-pipe pile, the homoenergetic is quick effectual connects the steel-pipe pile in the locating rack into a whole, promote the stability between the adjacent steel-pipe pile in the locating rack, compare in the installation that carries out support piece under water, effectively reduce the time of operation personnel under water work and avoid the safe risk that under water the operating time overlength exists. After the positioning frame sinks, the specific weight of the counterweight is determined according to the specific flow velocity of water flow, so that the stability of the bottom of the steel pipe pile is greatly improved, and the safety in the construction process is ensured.
Preferably, when the river bed is uneven, the second step further comprises: and (3) vibrating and sinking the steel pipe pile to a preset position, leveling the riverbed by adopting a sand bag, sinking the lower positioning frame to the bottom and fixing.
The further scheme is that when the bottom of the riverbed is bedrock, the second step further comprises the following steps: inserting the steel pipe pile into the positioning holes correspondingly formed in the upper positioning frame and the lower positioning frame, vibrating the steel pipe pile to the surface of the bedrock, pouring sand into the steel pipe pile to a first preset height, and sinking the lower positioning frame to the bottom and fixing the lower positioning frame.
Therefore, when the bottom of the river bed is the bedrock, the steel pipe pile cannot sink through vibration and is self-stable, and the steel pipe pile is vibrated into the surface of the bedrock at the bottom of the river bed, and then sand is filled into the pipe to reach the first preset height. The dead weight of the steel pipe pile is increased, and the stability of the steel pipe pile in the construction process is improved.
Further proposal is that when constructing to the span with the riverbed depth more than or equal to 10m, the second step also comprises: after the lower positioning frame is sunk to the bottom and fixed, a counterweight is installed on the lower positioning frame of the corresponding span section to be leveled, a steel sleeve box with a fourth preset size is sleeved on the outer side of a group of steel pipe piles in the width direction of the steel trestle, the steel sleeve box is arranged on the counterweight, concrete is poured into the steel sleeve box, sand is poured into the steel pipe piles to a second preset height higher than the top of the steel sleeve box, and a support frame is installed between the adjacent steel pipe piles.
Optionally, when the construction is carried out to a span with a riverbed depth of more than or equal to 10m, the second step further comprises: and after the lower positioning frame is sunk to the bottom and fixed, the weight of the counterweight piece mounted on the lower positioning frame is more than or equal to 20 tons, sand is poured into the steel pipe piles to a third preset height higher than the top of the counterweight piece, and a support frame is mounted between every two adjacent steel pipe piles.
It is thus clear that through irritate sand in the steel-pipe pile to predetermineeing height, weight on the weight of installing the steel jacket case and pouring concrete or increase weight and increase the dead weight, strengthened the ability that the steel-pipe pile resisted the flood impact force in flood period, also promoted the stability of steel-pipe pile simultaneously.
Preferably, the upper positioning frame is consistent with the lower positioning frame in structure, and when the upper positioning frame and the lower positioning frame are installed, the projection of the upper positioning frame in the vertical direction is overlapped with the lower positioning frame.
The further scheme is that more than one first positioning part is arranged on the upper positioning frame, more than one second positioning part is arranged on the lower positioning frame, each first positioning part corresponds to one second positioning part, and each first positioning part and each second positioning part respectively comprise more than two positioning holes which are symmetrical along the center line of the width direction of the steel trestle.
It can be seen from above that, go up the locating rack and make things convenient for batch production and construction with lower locating rack structure is the same, goes up the projection and the lower locating rack of the vertical direction of locating rack and overlaps, has guaranteed that the projection of the centre of a circle of locating hole inscription circle on the locating rack overlaps with the centre of a circle of locating hole inscription circle on the lower locating rack, and the demand of accurate positioning when satisfying the steel-pipe pile construction. The number of the positioning holes in the positioning frame can be set in a group of two by two according to construction requirements, and the bottoms of the steel pipe piles in corresponding number are connected into an integral structure.
The further scheme is that the Bailey sheet assembling frame is fixedly installed at the top of the shoulder pole beam, a movable limiting card is arranged on the shoulder pole beam, the Bailey sheet assembling frame comprises Bailey sheets, and the Bailey sheets are fixedly installed in the movable limiting card.
Therefore, the Bailey piece assembling frame and the shoulder pole beam are combined into a whole by arranging the movable limiting card to be matched with the Bailey piece, and the stability is improved.
In conclusion, the invention can quickly and effectively support and fix the bottom of the steel pipe pile in the steel pipe pile construction process, improve the stability of the foundation at the bottom of the steel pipe pile, improve the safety in the construction process, reduce the underwater construction time of operators and effectively increase the capability of resisting the water flow scouring force.
Drawings
Fig. 1 is a structural schematic diagram of a construction state of an embodiment of a construction method of an assembly type steel trestle of the invention.
Fig. 2 is a schematic structural diagram of a construction state two of the embodiment of the construction method of the assembly type steel trestle of the invention.
Fig. 3 is a schematic construction state diagram showing three structures in an embodiment of the construction method of the assembled steel trestle according to the invention.
Fig. 4 is a four-structure schematic diagram of a construction state of an embodiment of a construction method of an assembly type steel trestle of the invention.
Fig. 5 is a schematic overall structure diagram of an embodiment of a construction method of the assembly type steel trestle of the invention.
Fig. 6 is a schematic structural diagram of a positioning frame in an embodiment of a construction method of the assembly type steel trestle of the invention.
Fig. 7 is a plan layout view of a steel pipe pile, a steel jacket box, a cap beam and a shoulder pole beam according to an embodiment of the construction method of the fabricated steel trestle of the present invention.
Fig. 8 is an elevation view of a steel trestle according to an embodiment of a construction method of an assembly type steel trestle of the present invention.
Fig. 9 is an enlarged view of fig. 8 at a.
Detailed Description
In addition, the construction method can be applied to the construction of the steel trestle in various other scenes. The present embodiment is described by taking an example of application to a bridge constructed on a Tuo river. The bottom of a riverbed of a riverbank in the Tuojiang trestle construction is surveyed to form bedrock, the riverbed is covered with cobbles with uneven thickness, and the deepest part of the river is 13m, and the shallowest part of the river is 7m.
The construction method of the assembled steel trestle in the embodiment comprises the following steps:
referring to fig. 1 and 6, the present embodiment first performs step one: the method comprises the steps of leveling a field, lofting measurement, constructing a bridge head joint, performing installation construction of a Bailey piece assembling frame 1 with a first preset length on a bridge abutment 5, fixing a pressure load part 2 at one end, far away from a river bank, of the Bailey piece assembling frame 1, fixedly installing an upper positioning frame 3 on the upper surface of a preset position of the Bailey piece assembling frame 1 in a detachable mode, fixedly installing a lower positioning frame 4 with a structure identical to that of the upper positioning frame 3 on the lower surface of the Bailey piece assembling frame 1 and in a detachable mode on the position corresponding to the upper positioning frame 3, positioning and fixing the upper positioning frame 3 and the lower positioning frame 4 by adopting four pieces of finish-rolled threaded steel (not shown in the figure) with diameters of 25mm and nuts, ensuring that the projection of the upper positioning frame 3 in the vertical direction is overlapped with the lower positioning frame 4, and ensuring that the circle center of a circle inscribed in a positioning hole 16 of the upper positioning frame 3 is overlapped with the circle center of a circle inscribed in the positioning hole 16 of the lower positioning frame 4 in the vertical direction.
Referring to fig. 5 to 8, in this embodiment, each two of the bailey pieces 1 with the first preset length include bailey pieces 6, each two of the bailey pieces 6 are connected by a flower stand 20, three groups are installed in the width direction of the steel trestle 18, the bailey piece assembling frame 1 spanning the first preset length includes 8 bailey pieces 6 with the same structure in the length direction of the steel trestle 18, and the center part of the bailey piece assembling frame 1 with the first preset length is located at the center of the bridge abutment 5. Go up locating rack 3 and lower locating rack 4 and all adopt I25b I-steel welding to form, the interval of all one-to-one correspondence on last locating rack 3 and the lower locating rack 4 is provided with 4 locating holes 16, the shape of locating hole 16 is triangle-shaped, the area of the cross section of steel-pipe pile 7 slightly is less than the area of the inscribed circle of triangle-shaped locating hole 16, two adjacent locating holes 16 on the steel trestle 18 length direction are symmetrical along the central line of steel trestle 18 length direction, two adjacent locating holes 16 on the steel trestle 18 width direction are symmetrical each other along the central line of steel trestle 18 width direction. Optionally, the structures of the upper positioning frame 3 and the lower positioning frame 4 are welded according to the requirement of the layout number of each group of steel pipe piles 7, and the sizes of the welding feet on the upper positioning frame 3 and the lower positioning frame 4 are larger than or equal to 8mm.
Referring to fig. 2, 7 and 8, then, step two is performed: inserting a group of steel pipe piles 7 into four positioning holes 16 correspondingly arranged on the upper positioning frame 3 and the lower positioning frame 4, reserving diagonal draw bars (not shown in the figure) connected by high-strength bolts with the diameter of 3cm on the pipe wall of the preassembly position of the scissor type supporting frame 14 when the steel pipe piles 7 sink, vibrating the steel pipe piles 7 to the surface, not shown in the figure, of a bedrock, filling sand into the steel pipe piles 7 to the position at the top elevation of cobbles, and then sinking the lower positioning frame 4 to the bottom and welding and fixing. Optionally, when encountering a river section with an uneven riverbed, the second step further comprises: leveling is performed by using a first sand bag (not shown in the figure), and then the lower 4 positioning frames are sunk and welded and fixed. And a second sand bag 8 with a certain weight is arranged on the upper surface of the lower positioning frame 4, and the specific weight is set according to water flow and depth.
Referring to fig. 8, in this embodiment, when constructing a span with a bed depth of 10m or more, the second step further includes: after the lower locating rack 4 is sunk to the bottom and is welded and fixed, the lower locating rack 4 of the corresponding span is leveled by a sand bag 8, a steel sleeve box 13 with a fourth preset size is sleeved outside two steel pipe piles 7 in the width direction of the steel trestle, the steel sleeve box 13 is arranged on the sand bag 8, concrete is poured into the steel sleeve box 13, sand is poured into the steel pipe piles 7 to the position slightly higher than the top of the steel sleeve box 13, and the specific height is determined according to design requirements.
Optionally, when the construction is carried out to a span with a riverbed depth of more than or equal to 10m, the second step comprises the following steps: and (3) increasing the weight of the second sand bag 8 to be more than or equal to 20 tons, wherein the specific weight is increased along with the deepening of the depth, and then pouring sand into the steel pipe pile 7 to a position slightly higher than the top of the sand bag 8, wherein the specific height is determined according to design requirements.
And then 16a channel steel is adopted to be connected between the adjacent steel pipe piles 7 at the water depth of 4m in a staggered mode to form a scissor type supporting frame 14. Optionally, a support frame in an existing form may be installed between adjacent steel pipe piles 7 for support, and details are not repeated herein.
In this embodiment, the steel pipe piles 7 having an outer diameter of 529mm and a wall thickness of 10mm are grouped into four groups in the length direction and the width direction of the trestle, and the length of the steel pipe piles 7 is taken into consideration according to the actual depth of the river bed on site, and can be lengthened appropriately. The concrete structure of each steel pouring jacket 13 after construction is 1.5m multiplied by 6.0m multiplied by 1.5m, and the square amount of each foundation concrete is 13.5m 3 Total 13.5 × 4=54m 3 。
Referring to fig. 3 and 8, next, step three is performed: cutting off a steel pipe pile 7 with a first preset size on the water surface, forming a through groove (not shown in the figure) with the width of 18cm and the depth of 40cm on the top of a column along the width direction of a steel trestle 18, fixedly mounting a single I45b I-steel with a second preset size as a cap beam 11 in the through grooves on two steel pipe piles 7 along the length direction of the steel trestle 18, fixedly mounting two I45b I-steels with a third preset size as a shoulder beam 12 on the cap beam 11 at intervals along the width direction of the steel trestle 18, removing an upper positioning frame 3, removing a load 2, detaching a bailey piece assembling frame 1 with four bailey pieces 6 at one end of a bridge platform far away from a river bank, fixedly constructing the left bailey assembling frame 1 with four bailey pieces 6, laying transverse distribution beams 17 at equal intervals of 40cm on the bailey assembling frame 1, laying a steel plate (not shown in the figure) with the diameter of 1cm on the distribution beams 17, and welding round steel (not shown in the figure) as an anti-skid measure. The guardrails 19 on the two sides of the bridge floor are made of circular steel pipes with the diameter of 5cm, the height of the circular steel pipes is 1.2m, the circular steel pipes are welded with bridge floor steel plates, the distance between the circular steel pipes is 2m, and a safety net (not shown in the figure) is hung in the middle of the circular steel pipes to protect the safety of pedestrians. After completion, the conical slope filling and the like between the abutment 5 and the steel trestle 18 are performed, which is prior art and will not be described herein again.
Referring to fig. 8 and 9, in this embodiment, a movable limiting card 15 is disposed on the carrying pole beam 12, and one end of the bailey piece 6 is clamped in the movable limiting card 15, so that the carrying pole beam 12 and the bailey piece 6 are integrated into a whole, and the stability of the steel trestle is enhanced.
Referring to fig. 4, then, step four is performed: the Bailey piece assembling frame 1 which is connected with the second preset length along the next span is constructed for the next span, the positioning frame 3 is fixedly installed on the upper surface of the Bailey piece assembling frame 1 at the preset position, and the lower positioning frame 4 is fixedly installed on the lower surface of the Bailey piece assembling frame 1 at the corresponding position of the upper positioning frame 4.
The Bailey pieces assembled frame 1 with the second preset length in the embodiment comprises 4 Bailey pieces 6 with the same structure which are sequentially connected along the length direction of the steel trestle 18.
Finally, executing the step five: and repeating the second step to the fourth step until the planned installation of the length of the steel trestle 18 is completed.
When the water depth is greater than or equal to 10m, the mechanical calculation of the concrete foundation is performed, and the structure of the steel trestle 18 in the embodiment is the same as that of the existing fabricated steel trestle, so that the mechanical calculation of the steel pipe pile and other stressed rods can meet the construction requirements, and the detailed description is omitted, and only the stability of the underwater concrete and steel pipe pile combination is checked.
The calculation of the hydrodynamic pressure is considered according to general Specification for design of highway bridges and culverts (JTG D-60 2011),
in the formula: f w -standard value of running water pressure (kN); gamma-gravity density of water (kN/m) 3 ) The gravity density of water is 10kN/m 3 Calculating; v-design flow velocity (m/s), V =3m/s when calculated from flow; a-bridge pier water-blocking area (m) 2 ) Calculating to the position of a general flushing line according to 10 m; g-acceleration of gravity, g =9.81 (m/s) 2 ) (ii) a K-basic form factor, square K =1.5, rectangle K =1.3;
foundation F w ＝1.3×1.5×10×10×9÷(2×9.81)＝89.4KN
Steel pipe F w ＝1.3×0.529×10×10×9÷(2×9.81)＝31.5KN
According to the condition, the dynamic friction force factor of the concrete foundation of the steel pouring jacket and the bedrock piece is calculated according to mu =0.607, and the density of the concrete of the steel pouring jacket is 2400kg/m 3 The friction force F = mu G =0.607 x 1.5 x 6 x 2400 x 10 ÷ 1000=196.668KN between the concrete foundation of the steel pouring jacket and the bedrock is calculated, so that the friction force is far greater than the flowing water scouring force, the bearing steel pipe piles are in strong longitudinal and transverse connection, and the bearing steel pipe piles are embedded into the riverbed completely, and the structural stability meets the requirement.
It should be noted that the above is only a preferred embodiment of the present invention, but the design concept of the present invention is not limited thereto, and any insubstantial modifications made by using the design concept also fall within the protection scope of the present invention.
Claims (10)
1. A construction method of an assembled steel trestle comprises the following steps:
the method comprises the following steps: the installation construction and the fixation of the Bailey assembling frame which firstly spans a first preset length at the abutment are completed, an upper positioning frame is detachably and fixedly installed on the upper surface of a preset position of the Bailey assembling frame, a lower positioning frame is detachably and fixedly installed on the lower surface of the Bailey assembling frame and the position corresponding to the upper positioning frame, and the upper positioning frame and the lower positioning frame are detachably and fixedly connected by using a fastener;
the method is characterized in that:
step two: inserting steel pipe piles into positioning holes correspondingly formed in the upper positioning frame and the lower positioning frame, vibrating and sinking the steel pipe piles to a preset position, sinking the lower positioning frame to the bottom and fixing, mounting a counterweight with preset weight on the upper surface of the lower positioning frame, and mounting a support frame between the adjacent steel pipe piles;
step three: cutting off the steel pipe piles with a first preset size on the water surface, fixedly mounting a cap beam with a second preset size on each group of steel pipe piles in the length direction of the steel trestle, fixedly mounting a shoulder pole beam with a third preset size on the cap beam in the width direction of the steel trestle, removing the upper positioning frame, dismantling the Bailey piece assembling frame with the second preset length on the bridge abutment, performing fixed construction on the rest Bailey piece assembling frame, and laying a transverse distribution beam and a bridge deck steel plate on the Bailey piece assembling frame to complete construction of a corresponding span section;
step four: connecting the Bailey piece assembling frames with a third preset length along the arrangement direction of the next span to carry out construction of the next span, detachably and fixedly mounting upper positioning frames on the upper surfaces of the preset positions of the Bailey piece assembling frames, and detachably and fixedly mounting lower positioning frames on the lower surfaces of the preset positions of the Bailey piece assembling frames and the upper positioning frames;
step five: and repeating the second step to the fourth step until the planned installation of the length of the steel trestle is finished.
2. The construction method of the assembled steel trestle according to claim 1, characterized in that:
when the river bed is uneven, the second step further comprises the following steps: and vibrating and sinking the steel pipe pile to a preset position, leveling a river bed by using a sand bag, and sinking the lower positioning frame to the bottom and fixing.
3. The construction method of the fabricated steel trestle according to claim 1 or 2, characterized in that:
when the bottom of the riverbed is bedrock, the second step further comprises the following steps: inserting the steel pipe pile into the positioning holes correspondingly formed in the upper positioning frame and the lower positioning frame, vibrating the steel pipe pile to the surface of the bedrock, filling sand into the steel pipe pile to a first preset height, and sinking the lower positioning frame to the bottom and fixing.
4. The construction method of the assembly type steel trestle according to claim 1 or 2, characterized in that:
when constructing to the span with the riverbed depth more than or equal to 10m, the second step further comprises the following steps: and sinking the lower positioning frame to the bottom and fixing the lower positioning frame, leveling the counterweight on the lower positioning frame corresponding to the span, sleeving a steel sleeve box with a fourth preset size on the outer side of the steel pipe pile along the width direction of the steel trestle, pouring concrete into the steel sleeve box, pouring sand into the steel pipe pile to a second preset height higher than the top of the steel sleeve box, and installing a support frame between the steel pipe piles.
5. The construction method of the fabricated steel trestle according to claim 1 or 2, characterized in that:
when the construction is carried out to a span with the riverbed depth being more than or equal to 10m, the second step further comprises the following steps: and after the lower positioning frame is sunk to the bottom and fixed, the weight of the counterweight on the lower positioning frame is more than or equal to 20 tons, sand is poured into the steel pipe piles to a third preset height higher than the top of the counterweight, and a support frame is arranged between every two adjacent steel pipe piles.
6. The construction method of the assembly type steel trestle according to claim 1 or 2, characterized in that:
the upper positioning frame is consistent with the lower positioning frame in structure, and when the upper positioning frame and the lower positioning frame are installed, the projection of the upper positioning frame in the vertical direction is overlapped with the lower positioning frame.
7. The construction method of the assembly type steel trestle according to claim 1 or 2, characterized in that:
the steel trestle bridge positioning structure is characterized in that more than one first positioning part is arranged on the upper positioning frame, more than one second positioning part is arranged on the lower positioning frame, each first positioning part corresponds to one second positioning part, and each first positioning part and each second positioning part respectively comprise more than two positioning holes symmetrically arranged along the center line of the width direction of the steel trestle.
8. The construction method of the fabricated steel trestle according to claim 1 or 2, characterized in that:
the Bailey sheet assembling frame is fixedly arranged at the top of the shoulder pole beam, a movable limiting card is arranged on the shoulder pole beam, the Bailey sheet assembling frame comprises Bailey sheets, and the Bailey sheets are fixedly arranged in the movable limiting card.
9. The construction method of the assembly type steel trestle according to claim 1 or 2, characterized in that:
the support frame is a scissors type support frame.
10. The construction method of the fabricated steel trestle according to claim 1 or 2, characterized in that:
and the sizes of the welding feet on the upper positioning frame and the lower positioning frame are both more than or equal to 8mm.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111200078.4A CN113832862B (en) | 2021-10-14 | 2021-10-14 | Construction method of assembled steel trestle |
| DE202022102234.8U DE202022102234U1 (en) | 2021-10-14 | 2022-04-26 | Precast steel trestle bridge |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111200078.4A CN113832862B (en) | 2021-10-14 | 2021-10-14 | Construction method of assembled steel trestle |
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| Publication Number | Publication Date |
|---|---|
| CN113832862A CN113832862A (en) | 2021-12-24 |
| CN113832862B true CN113832862B (en) | 2023-04-11 |
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Citations (6)
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| CN106284089A (en) * | 2016-08-31 | 2017-01-04 | 中铁大桥局集团有限公司 | A kind of steel trestle rapid constructing method |
| CN106351242A (en) * | 2016-08-31 | 2017-01-25 | 中交第二航务工程局有限公司 | Deepwater high-flow-rate exposed high-strength steep rock sea area steel trestle and construction method thereof |
| CN108824432A (en) * | 2018-07-25 | 2018-11-16 | 中铁五局集团贵州工程有限公司 | Bailey beam trestle steel pipe pile cantilevered adjustable positioning frame in water |
| CN212175782U (en) * | 2020-01-14 | 2020-12-18 | 中建五局土木工程有限公司 | Steel trestle steel pipe pile construction guide frame |
| KR102231581B1 (en) * | 2020-08-18 | 2021-03-24 | 유민상 | Construction method for medium and large rotational penetration pile |
| CN113403965A (en) * | 2021-06-23 | 2021-09-17 | 中建三局基础设施建设投资有限公司 | Positioning guide frame for steel trestle steel pipe pile construction and construction method |
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- 2021-10-14 CN CN202111200078.4A patent/CN113832862B/en active Active
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106284089A (en) * | 2016-08-31 | 2017-01-04 | 中铁大桥局集团有限公司 | A kind of steel trestle rapid constructing method |
| CN106351242A (en) * | 2016-08-31 | 2017-01-25 | 中交第二航务工程局有限公司 | Deepwater high-flow-rate exposed high-strength steep rock sea area steel trestle and construction method thereof |
| CN108824432A (en) * | 2018-07-25 | 2018-11-16 | 中铁五局集团贵州工程有限公司 | Bailey beam trestle steel pipe pile cantilevered adjustable positioning frame in water |
| CN212175782U (en) * | 2020-01-14 | 2020-12-18 | 中建五局土木工程有限公司 | Steel trestle steel pipe pile construction guide frame |
| KR102231581B1 (en) * | 2020-08-18 | 2021-03-24 | 유민상 | Construction method for medium and large rotational penetration pile |
| CN113403965A (en) * | 2021-06-23 | 2021-09-17 | 中建三局基础设施建设投资有限公司 | Positioning guide frame for steel trestle steel pipe pile construction and construction method |
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| CN113832862A (en) | 2021-12-24 |
| DE202022102234U1 (en) | 2022-07-01 |
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