CN114717928A

CN114717928A - Temporary construction trestle suitable for muddy area and construction method

Info

Publication number: CN114717928A
Application number: CN202210411625.1A
Authority: CN
Inventors: 刘耀东; 彭瑶杰; 李中流
Original assignee: Hubei University of Technology
Current assignee: Hubei University of Technology
Priority date: 2022-04-19
Filing date: 2022-04-19
Publication date: 2022-07-08

Abstract

The invention discloses a temporary construction trestle suitable for a muddy area and a construction method, wherein the temporary construction trestle comprises a bridge deck upper structure and a lower structure, and the lower structure comprises a connecting assembly, a buoyancy tank and a plurality of positioning assemblies; the connecting assembly is used for connecting the deck system upper structure and the buoyancy tank; the positioning assembly is formed by connecting a positioning pile and an uplift pile with a pointed end and a barb-shaped structure distributed on a pile body; the buoyancy tank is a closed tank structure which floats on the water surface when not injected with water and sinks after water injection; the buoyancy tank is provided with a water inlet hole, a water outlet hole and a channel for the positioning assembly to pass through; each positioning component penetrates through a corresponding channel on the buoyancy tank so as to be connected with the buoyancy tank; after water is injected, the buoyancy tank sinks, the positioning assembly is driven to sink, and the uplift pile is inserted into silt. The temporary construction trestle is suitable for muddy areas, and is simpler in construction process and lower in construction cost.

Description

Temporary construction trestle suitable for muddy area and construction method

Technical Field

The invention belongs to the technical field of building construction, and particularly relates to a temporary construction trestle suitable for a muddy area and a construction method.

Background

As the basic construction of China is developed more and more quickly, the bridge construction development is also accelerated continuously. In bridge construction, a construction trestle parallel to the axis of a main bridge is usually required to be constructed before main construction, and is used for personnel passing and transportation construction facilities and the like during construction. And the bridge construction in deep water silt matter district often faces the technical requirement of higher difficulty, and also can waste more manpower and materials according to traditional construction landing stage. At present, a sunken steel pipe pile is usually used as a lower structure of an overwater construction trestle, an assembled Bailey truss is adopted as an upper structure bearing beam, and a bridge deck is composed of a profile steel distribution beam, a steel plate bridge deck and other accessory facilities which are arranged on the Bailey truss. The trestle is built in a sludge area in a traditional mode, the lower structure is greatly influenced by sludge, long time and a lot of materials are consumed during building, difficulty is high, and engineering cost is high. It is desirable to design a temporary construction trestle suitable for use in silty areas.

Disclosure of Invention

The invention aims to provide a temporary construction trestle suitable for a muddy area and a construction method.

The technical scheme of the invention is as follows:

a temporary construction trestle suitable for muddy areas comprises a bridge deck system upper structure and a bridge deck system lower structure; the lower structure comprises a connecting assembly, a buoyancy tank and a plurality of positioning assemblies; wherein: the connecting assembly is used for connecting the deck system upper structure and the buoyancy tank; the positioning assembly is formed by connecting a positioning pile and an uplift pile with a pointed end and a barb-shaped structure distributed on a pile body;

the buoyancy tank is a closed tank structure which floats on the water surface when not injected with water and sinks after water injection; the buoyancy tank is provided with a water inlet hole, a water outlet hole and a channel for the positioning assembly to pass through; each positioning component penetrates through a corresponding channel on the buoyancy tank so as to be connected with the buoyancy tank; after water is injected, the buoyancy tank sinks, the positioning assembly is driven to sink, and the uplift pile is inserted into silt.

In the temporary construction trestle, the upper structure of the bridge deck system can be the existing upper structure of the bridge deck system, and the upper structure of the bridge deck system is not limited. In some embodiments, a bridge deck superstructure may be used as follows: the bridge deck system upper structure comprises a bridge deck structure and an upper structure; the bridge deck structure is laid on the upper cushion beam, and the plurality of Bailey beams are fixedly arranged between the upper cushion beam and the lower cushion beam in a transverse spaced mode.

In the temporary construction trestle of the invention, the connecting assembly is used for connecting the upper structure of the bridge deck system and the buoyancy tank. In some embodiments, the connecting assembly includes a plurality of pillars, and the upper and lower ends of the pillars are fixedly connected to the bottom end of the upper structure of the bridge deck and the top end of the buoyancy tank, respectively. In order to make the lower structure more stable, every two pier studs are connected by means of transverse connecting pieces.

In the temporary construction trestle, the positioning assembly is firmly inserted into the silt, so that the trestle is more stable, and the uplift pile with the tip and the inverted-thorn-shaped pile body is designed, so that the silt can be firmly inserted.

In some specific embodiments, the positioning pile and the uplift pile both adopt hollow circular steel tubes, and the bottom end of the positioning pile is sleeved in the top end of the uplift pile; the spud bottom still overlaps and is equipped with the rubber voussoir, and the rubber voussoir is located the junction of spud and uplift pile for it is inseparabler to make spud and uplift pile connect.

In some embodiments, the positioning pile is formed by connecting a plurality of positioning rods through a flange plate, and the length adjustment of the positioning pile can be realized by increasing or decreasing the number of the positioning rods.

In some specific embodiments, the buoyancy tank is further provided with an overhaul channel, and an overhaul ladder is arranged in the overhaul channel and is used for workers to overhaul the buoyancy tank.

In some embodiments, the top surface of the buoyancy tank is provided with a fixing mechanism for fixing the connecting component; the fixing mechanism is a hollow short cylinder, and the lower end of the fixing mechanism is fixed at the top end of the buoyancy tank; the bottom end of the connecting assembly is connected with the fixing mechanism in a sleeved mode, and the bottom end of the connecting assembly is fixedly connected with the fixing mechanism through the fixing piece.

In some embodiments, the interior of the buoyancy tank is divided into a plurality of independent chambers, each chamber is provided with a water inlet and a water outlet, and the chambers independently feed and discharge water without influencing each other, so that the failure rate can be reduced, and the workload during maintenance can be reduced.

In some specific embodiments, the periphery of the bottom end of the buoyancy tank is provided with the enclosure baffle, and the four corners of the buoyancy tank are respectively welded and reinforced by the stiffening plates.

The construction method of the temporary construction trestle suitable for the muddy area comprises the following steps:

prefabricating a positioning assembly and a buoyancy tank, and transporting the positioning assembly and the buoyancy tank to a designated position in water; connecting the uplift pile and the positioning pile to obtain a positioning assembly, and enabling the positioning assembly to penetrate through a corresponding channel on the buoyancy tank; injecting water into the buoyancy tank, and slowly sinking the buoyancy tank below the water surface; in the process of water injection and sinking of the buoyancy tank, the positioning rod is added according to the water depth; when the buoyancy tank sinks to a designated elevation, draining the buoyancy tank, and hoisting the connecting assembly at the top end of the buoyancy tank after water is drained completely, so as to complete the foundation of the temporary construction trestle; building a plurality of foundations by the same method, and splicing the foundations into trestle segments; and erecting a bridge deck system upper structure on the trestle segment.

Compared with the prior art, the invention has the following characteristics and beneficial effects:

at present, a temporary construction trestle is constructed in a silt region, steel pipe piles are mostly used as a substructure, the construction is complex, the cost is high, and the environmental pollution to surrounding water bodies is serious. According to the invention, through the combination of the buoyancy tank and the uplift pile, the problem that the steel pipe pile in the sludge area is difficult to pile is solved, a plurality of troubles in the construction process are avoided, and the construction is simplified; and fully consider the construction theory of green building, adopt assembled construction technology with interim construction trestle overall structure modularization to accelerated the construction progress, improved work efficiency, and recoverable.

The temporary construction trestle is an assembly type construction trestle, is easy to transport and install, and can be recycled after being disassembled. Due to the assembled characteristic, all the components are uniform in size, and the template is simpler to manufacture and process. Compared with the traditional overwater steel pipe pile construction trestle, the construction method has the advantages that longer piles are not needed in a muddy area, the construction period is shortened, the cost is lowered, the construction difficulty is reduced, and the pollution to the water body environment is less. The buoyancy tank is positioned on the sludge, so that the passage of a channel and the change of water level are not influenced; the water level is not influenced by the change of the water level, and the water level control device can completely adapt to the sudden change of the water level and is safe and reliable. Meanwhile, the baffle at the bottom end of the buoyancy tank is inserted into the sludge, so that the baffle cannot be influenced by water flow and can move around. The inside sealed cavity that is of buoyancy case cuts apart into little cavity with the cavity, and establishes the support chassis, ensures the stability and the rigidity of buoyancy case structure. The independent chambers can independently feed and discharge water, so that the buoyancy tank can smoothly feed and discharge water in the construction process and is not interfered with each other.

Drawings

FIG. 1 is a schematic structural diagram of a temporary construction trestle in an embodiment;

FIG. 2 is a plan view of a lower structure in the embodiment;

fig. 3 is a schematic structural view of the uplift pile in the embodiment;

FIG. 4 is a schematic structural diagram of a spud in an embodiment;

fig. 5 is a schematic view showing the connection of the spud and the uplift pile in the embodiment;

FIG. 6 is a schematic diagram showing a specific structure of a spud according to an embodiment;

FIG. 7 is a schematic view showing the detailed structure of the buoyancy tank according to the embodiment.

In the figure: 100-bridge deck system upper structure, 110-bridge deck structure, 120-upper pad beam, 130-Bailey beam and 140-lower pad beam; 200-connecting component, 210-pier stud, 210 a-first pier stud, 210 b-second pier stud, 210 c-third pier stud, 210 d-fourth pier stud and 220-transverse connecting component; 300-a buoyancy tank, 310-a water inlet, 320-a water outlet, 330-an inspection channel, 340-a fixing mechanism, 350-a bolt and 360-a first stiffening plate; 400-positioning component, 410-positioning pile, 411-positioning rod, 412-flange plate, 420-uplift pile, 430-rubber wedge block and 440-connecting piece; 500-baffle, 600-second stiffening plate.

Detailed Description

In order to make the objects, technical solutions and advantages of the present invention more apparent, embodiments of the present invention are further described below with reference to the accompanying drawings. It should be understood that the embodiments described herein are merely illustrative of the present invention and are not intended to limit the present invention.

Examples

Referring to fig. 1 to 7, the temporary construction trestle of the present embodiment mainly includes a bridge deck upper structure 100 and a lower structure, the bridge deck upper structure 100 includes a bridge deck structure 110 and an upper structure for bearing the bridge deck structure 110, the upper structure includes an upper pad beam 120, a beret beam 130 and a lower pad beam 140, the bridge deck structure 110 is laid on the upper pad beam 120, and a plurality of beret beams 130 are fixedly installed between the upper pad beam 120 and the lower pad beam 140 in a transversely spaced manner. In this embodiment, the beret beams are assembled in advance, each beret beam is formed by connecting and fixing a plurality of beret sheets in series through beret pins, the assembled beret beams are transported to a construction pier position and are fixedly installed at a preset position between an upper pad beam and a lower pad beam. The Bailey beam has the advantages of simple structure, convenient transportation, quick erection, large load capacity, easy maintenance and replacement and strong adaptability.

The substructure includes a connection assembly 200, a buoyancy tank 300, and a positioning assembly 400, the connection assembly 200 being used to connect the superstructure and the buoyancy tank, and the positioning assembly 400 being used to be inserted and fixed in the sludge. The connecting assembly 200 includes a plurality of piers 210, the upper and lower ends of the piers 210 are respectively fixed to the bottom end of the lower bolster 140 and the top end of the buoyancy tank 300, and the piers 210 are vertically fixed between the lower bolster 140 and the buoyancy tank 300. In this embodiment, the pier 210 is made of steel pipes, i-beam beams are fixed to the top ends of the steel pipes, and the lower bolster 140 is mounted to the top ends of the steel pipes through the i-beam beams. As a preferable embodiment of the present embodiment: the pillars 210 are connected to each other through the transverse connection member 220, and the transverse connection member 220 connects the pillars 210 to each other to form a whole, thereby improving the stability of the lower structure. As shown in fig. 2, in this embodiment, the connection assembly 200 includes 4 pillars, which are respectively marked as a first pillar 210a, a second pillar 210b, a third pillar 210c, and a fourth pillar 210d, the first pillar 210a, the second pillar 210b, the third pillar 210c, and the fourth pillar 210d enclose a rectangle, and a transverse connection member 220 is connected between every two pillars.

The positioning assembly 400 is formed by connecting a positioning pile 410 and an uplift pile 420. Transverse connectors 440 may be connected between spuds 410 for stability. The uplift pile 420 has a tip and a pile body with a barb-shaped structure, as shown in fig. 3, the tip is beneficial for the uplift pile 420 to be inserted into the sludge, and after the uplift pile 420 is inserted into the sludge, the barb-shaped structure distributed on the pile body can enable the uplift pile 420 to be tightly combined with the sludge, so that the insertion is more reliable. In the construction process, the compactness of the combination of the uplift pile 420 and the sludge can be further enhanced by impacting the uplift pile 420 without stopping vibration. As shown in fig. 5, spud 410 is attached to the top end of uplift pile 420. Spud 410 and uplift pile 420 all adopt hollow circular steel tube in this embodiment, spud 410 links to each other with the uplift pile 420 top in the cup joint mode, promptly: the bottom end of spud 410 is inserted into the top end of uplift pile 420. The outer diameter of the bottom end of the positioning pile 410 is slightly smaller than the outer diameter of the top end of the uplift pile 420, the outer diameter of the pile body of the positioning pile 410 is larger than the outer diameter of the uplift pile 420, the rubber wedge 430 is sleeved at the bottom end of the positioning pile 410, and the rubber wedge 430 is located at the joint of the positioning pile 410 and the uplift pile 420, so that the positioning pile 410 and the uplift pile 420 can be combined more tightly.

As a preferred scheme of this embodiment, the surfaces of the spud 410 and the uplift pile 420 are subjected to anti-corrosion treatment, so that the temporary construction trestle is not corroded in the whole construction process, the residual value of the spud 410 and the uplift pile 420 after the temporary construction trestle is removed can be improved, and the safety, the adaptability and the attractiveness of the temporary construction trestle after the anti-corrosion treatment are greatly improved. As another preferable aspect of the present embodiment: the spud 410 is formed by connecting a plurality of spuds 411 through a flange plate 412, as shown in fig. 6, the number of the spuds 411 can be increased or decreased as required to adapt to different water depths.

The buoyancy tank 300 is a closed tank structure that floats on the water surface when not filled with water and sinks after being filled with water, and in this embodiment, the buoyancy tank 300 is a rectangular closed tank structure and is made of steel. The buoyancy tank 300 is provided with a water inlet hole 310, a water outlet hole 320, and a channel for the positioning assembly to pass through, wherein the water inlet hole 310 is preferably located at a level higher than the water outlet hole 320. In this embodiment, 4 positioning assemblies are included, and only one positioning pile 410 is labeled at four corners of the buoyancy tank 300 in fig. 2. Four passages (not shown) are provided at four corners of the buoyancy tank 300 for the positioning members to pass through, and each positioning member passes through one passage to be connected to the buoyancy tank 300, and the positioning members can restrict the movement of the buoyancy tank 300. As the preferred scheme of this embodiment, still be equipped with maintenance passageway 330 in the middle of buoyancy tank 300, establish in the maintenance passageway 330 and supply the people to go up and down the maintenance ladder, make things convenient for the staff to overhaul buoyancy tank 300.

The top surface of the buoyancy tank 300 is further provided with a fixing mechanism 340, and the fixing mechanism 340 is in one-to-one correspondence with the pillars 210 and is used for fixing the bottom ends of the pillars 210. In this embodiment, the fixing mechanism 340 is a hollow short cylinder made of steel, and the lower end thereof is fixed to the top end of the buoyancy tank 300. The outer wall of the lower part of the fixing mechanism 340 is provided with threads, the top end of the buoyancy tank 300 is preset with matched threaded holes, the lower part of the fixing mechanism 340 is fixed in the corresponding threaded holes through the threads, and then the filler is used for filling the gap at the joint, so that the fixing mechanism 340 is tightly connected to the top end of the buoyancy tank 300. The bottom end of the pier 210 is connected to the fixing mechanism 340 in a sleeved manner, the outer diameter of the pier 210 should be slightly larger than the outer diameter of the fixing mechanism 340, when the pier 210 is connected, the bottom end of the pier 210 is sleeved outside the fixing mechanism 340, and then the pier 210 is fixed to the fixing mechanism 340 through a fixing member (e.g., a bolt 350). Preferably, a first stiffener plate 360 is welded at the connection of the fixing member and the fixing mechanism 340. The connection mode between the pier 210 and the buoyancy tank 300 provided in this embodiment can enhance the integrity and rigidity of the pier 210, reduce the height-to-fineness ratio of the pier, and improve the stability of the pier; the integral connection between the pier stud and the buoyancy tank can be further enhanced, and the integral stability is further improved.

One preferred scheme of the buoyancy tank in this embodiment is: with the inside a plurality of independent cavities of cutting apart of buoyancy case 300, inlet opening and apopore are established respectively to each cavity, and the inlet opening and the apopore of each cavity follow equally: the horizontal position of the water inlet hole is higher than that of the water outlet hole. The chambers are independently supplied with water or drained without influence. When a chamber is damaged, other chambers can still normally play a role; when the maintenance is carried out, the staff only need to carry out the maintenance alone to the damage cavity. The preferred scheme can reduce the failure rate and the workload during maintenance.

One specific implementation of the preferred scheme is as follows: a supporting framework and a partition plate are welded inside the buoyancy tank 300 to divide the inside of the buoyancy tank 300. This embodiment also facilitates increasing the overall stiffness of the buoyancy tank 300, making the buoyancy tank 300 more uniformly stressed.

As shown in fig. 2 and 7, the interior of the buoyancy tank 300 is divided into upper and lower layers, each layer is divided into 4 independent chambers, and the buoyancy tank 300 is divided into 8 independent chambers in the present embodiment. The inlet openings 310 of each chamber are located above the chamber and the outlet openings 320 are located below the chamber, as shown in fig. 7, which identifies the inlet and outlet positions of a single chamber. All business turn over water holes all are close to the maintenance passageway 330 setting in the middle part of buoyancy case 300 simultaneously, when the maintainer overhauls, are convenient for correspond the cavity through the inlet opening or the apopore business turn over of each cavity.

Preferably, steel enclosure plates 500 are arranged around the bottom end of the buoyancy tank 300, and the enclosure plates 500 and the lower portion of the buoyancy tank 300 are reinforced by second stiffening plates 600. The baffle plate 500 is welded at the bottom of the buoyancy tank 300, and four corners of the buoyancy tank 300 are respectively welded and reinforced by using stiffening plates. When the buoyancy tank 300 sinks, the apron 500 is inserted into the sludge, preventing the buoyancy tank 300 from moving around.

A construction process of the temporary construction trestle according to the embodiment will be provided below, although the construction process is not limited thereto.

The positioning assembly 400 and the buoyancy tank 300 are prefabricated, and the fixing mechanism 340 is pre-installed on the buoyancy tank 300. The positioning assembly 400 and the buoyancy tank 300 are transported to a designated position in the water, the uplift pile 420 and the positioning pile 410 are connected, and then the positioning pile 410 passes through a corresponding channel on the buoyancy tank 300. The buoyancy tank 300 is filled with water and the buoyancy tank 300 slowly sinks below the water surface. In the process of water injection and sinking of the buoyancy tank 300, the positioning rod 411 is increased according to the water depth to increase the length of the positioning pile 410. While the pier 210 is installed at the top end of the buoyancy tank 300.

After the buoyancy tank 300 is sunk to a designated elevation, the buoyancy tank 300 is drained, and at this time, the uplift pile 420 functions to be tightly combined with sludge. After the water is drained, the pier 210 is lifted continuously, and the pier 210 is connected with the fixing mechanism 340. After the pier columns 210 are installed, the transverse connecting piece 220 is installed between the pier columns 210, and then the temporary construction of the trestle foundation is completed. In the same way, additional foundations are built, and the foundations are spliced into trestle segments.

The bridge deck upper structure 100 is erected on the trestle segment, the Bailey beams 130 are assembled by combining 321-shaped Bailey pieces and 90-shaped support frames, and the Bailey beams 130 are transported to the construction pier columns 210. The worker determines the specific position of the bailey beam 130 on the upper and lower bolster

beams

120 and 140, installs the bailey beam 130 by using a crane in cooperation, and finally fixes the bailey beam 130 on the upper and lower bolster

beams

120 and 140 by using a U-shaped clamp. When the Bailey beam 130 is installed, an expansion joint with the width of 20cm is arranged every four spans. After the Bailey beams 130 are completely erected, tie beams which are transversely connected are arranged at preset intervals along the route direction, the tie beams are fixed by U-shaped bolts, the four groups of Bailey beams 130 are connected into a whole, and then the bridge deck structure 110 is paved.

Although the present invention has been described in detail with reference to specific embodiments thereof, it will be understood by those skilled in the art that various changes and modifications can be made therein without departing from the spirit and scope of the invention as defined in the appended claims.

Claims

1. The utility model provides a interim construction landing stage suitable for silt matter district, includes bridge floor system superstructure and substructure, characterized by:

the lower structure comprises a connecting assembly, a buoyancy tank and a plurality of positioning assemblies; wherein: the connecting assembly is used for connecting the deck system upper structure and the buoyancy tank; the positioning assembly is formed by connecting a positioning pile and an uplift pile with a pointed end and a barb-shaped structure distributed on a pile body;

2. A temporary construction trestle suitable for muddy areas as defined in claim 1, wherein:

the bridge deck superstructure comprises a bridge deck structure and a superstructure; the bridge deck structure is laid on the upper cushion beam, and the plurality of Bailey beams are fixedly arranged between the upper cushion beam and the lower cushion beam in a transverse spaced mode.

3. A temporary construction trestle suitable for muddy areas as defined in claim 1, wherein:

the connecting assembly comprises a plurality of pier columns, and the upper ends and the lower ends of the pier columns are fixedly connected with the bottom end of the upper structure of the bridge deck system and the top end of the buoyancy tank respectively.

4. A temporary construction trestle suitable for muddy areas as defined in claim 3, wherein:

the pier columns are connected pairwise through transverse connecting pieces.

5. A temporary construction trestle suitable for muddy areas as defined in claim 1, wherein:

the positioning pile and the uplift pile both adopt hollow circular steel tubes, and the bottom end of the positioning pile is sleeved into the top end of the uplift pile; the bottom end of the positioning pile is further sleeved with a rubber wedge block, and the rubber wedge block is located at the connecting position of the positioning pile and the uplift pile.

6. A temporary construction trestle suitable for muddy areas as defined in claim 1, wherein:

the buoyancy tank still is equipped with the access way, establish the maintenance ladder in the access way.

7. A temporary construction trestle suitable for muddy areas as defined in claim 1, wherein:

the top surface of the buoyancy tank is provided with a fixing mechanism for fixing the connecting assembly; the fixing mechanism is a hollow short cylinder, and the lower end of the fixing mechanism is fixed at the top end of the buoyancy tank.

8. A temporary construction trestle suitable for muddy areas as defined in claim 1, wherein:

the interior of the buoyancy tank is divided into a plurality of independent cavities, and each cavity is provided with a water inlet hole and a water outlet hole.

9. A temporary construction trestle suitable for muddy areas as defined in claim 1, wherein:

and the periphery of the bottom end of the buoyancy tank is provided with the enclosure baffle, and the four corners of the buoyancy tank are respectively welded and reinforced by the stiffening plates.

10. The method of constructing a temporary construction trestle suitable for use in a muddy area as set forth in claim 1, comprising: