CN211333866U - High-speed railway beam-making pedestal suitable for unfavorable geology - Google Patents

Abstract

The utility model discloses a high-speed railway system roof beam pedestal suitable for unfavorable geology belongs to civil engineering technical field, and system roof beam pedestal includes the tubular pile basis more than two rows, and every calandria pile basis includes the tubular pile that a plurality of intervals set up, all erects the honeycomb beam assembly who arranges side by side on every calandria pile basis, and multirow honeycomb beam assembly passes through the connecting piece and links to each other with the tubular pile, links to each other through the transverse connection roof beam between two liang of adjacent honeycomb beam assemblies. The utility model can be widely applied to geology with various adverse conditions, has good integrity, large structural rigidity and small dead weight, and can effectively control foundation settlement; the mechanical construction degree is high, and the construction quality is easy to control; the honeycomb beam assembly can be repeatedly utilized, the problem of field secondary tillage in the later period is solved, the environmental pollution is reduced, green construction is realized, and the investment and the labor investment of large-scale equipment in the earlier period are reduced; the method has the advantages of no need of digging a foundation pit on site, no pouring of concrete, neat site, low cost, short construction period and early completion and production.

Description

High-speed railway beam pedestal suitable for bad geology

technical field

The utility model belongs to the technical field of civil engineering, in particular to a high-speed railway beam-making pedestal suitable for poor geology.

Background technique

The high-speed railway prefabricated box girder has high requirements on the strength and rigidity of the girder pedestal due to its heavy weight and strict apparent deformation requirements. For conventional high-speed railway beam-making pedestals, three or four reinforced concrete strip beams or frame beams are set on the pile foundation caps or enlarged foundations, prefabricated box girder steel formwork is installed on the concrete beams, reinforced cages are bound, and concrete box beams are poured. This conventional production method has a long construction period and consumes a lot of steel bars and concrete, which greatly affects the field construction speed of the prefabricated beam field. After the prefabrication of the box girder is completed, the site must be returned to the farmland, and the girder pedestal will be dismantled.

At present, the prefabricated I-beam steel structure has been used to replace the conventional beam-making pedestal structure, and the I-beam and steel supports are used to replace the strip beam foundation. This method is improved compared with the conventional method, but requires a large number of prefabricated parts, and in Stability calculations are more complicated.

Utility model content

The purpose of this utility model is to provide a high-speed railway beam-making pedestal suitable for poor geology, aiming to solve the problems of the above-mentioned prior art concrete beam-making pedestal with long construction period and many consumables, high cost of dismantling after completion, and large waste of resources. The steel structure beam pedestal requires a large number of prefabricated parts, and the stability calculation is relatively complex technical problems.

In order to solve the above-mentioned technical problems, the technical scheme adopted by the present utility model is:

A high-speed railway beam-making pedestal suitable for poor geology is characterized in that: it includes more than two rows of pipe pile foundations, each row of pipe pile foundations includes a plurality of pipe piles arranged at intervals, and honeycomb beam assemblies are erected on each row of pipe pile foundations , and multiple rows of honeycomb beam assemblies are arranged side by side and are connected with the pipe piles through connecting pieces; two adjacent honeycomb beam assemblies are connected by a plurality of horizontal connecting beams arranged at intervals.

Preferably, the honeycomb beam assembly includes end honeycomb beams at both ends and a plurality of standard section honeycomb beams connected in sequence in the middle, the junction of the end honeycomb beams and the standard section honeycomb beams, and the junction of adjacent standard section honeycomb beams The end parts of the honeycomb beams and the ends of the standard section honeycomb beams are fixedly connected to the pipe piles through connecting pieces.

Preferably, the end honeycomb beam includes an upper flange plate, a lower flange plate and two web plates, the two web plates are arranged side by side between the upper flange plate and the lower flange plate, and the middle part of the two web plates Polygonal holes are arranged in parallel horizontally; the standard section honeycomb beam is I-shaped, and the standard section honeycomb beam includes an upper flange plate, a lower flange plate and a The middle of the web is horizontally juxtaposed with polygonal holes.

Preferably, ribs are arranged vertically at intervals between the end honeycomb beams and the outer sides of the webs of the standard section honeycomb beams; connecting parts are reserved between the ribs arranged at the ends of the end honeycomb beams and their ends, and the transverse Both ends of the connecting beam are matched with the connecting part and the adjacent rib plates.

Preferably, the two sides of the longitudinal junction between the end honeycomb beams, the standard section honeycomb beams and the adjacent standard section honeycomb beams are connected by splicing plates.

Preferably, the transverse connecting beams include two rows of I-beams, and the two rows of I-beams are arranged side by side between adjacent end honeycomb beams and between adjacent standard section honeycomb beams. The honeycomb beam and the standard section honeycomb beam are perpendicular to each other.

Preferably, the pipe piles are PHC pipe piles, the PHC pipe piles are formed in separate parts, the PHC pipe piles include a pile body and a pile cap for connecting with a connector, and the pile body includes a lower section pile and an upper section pile. Section piles, the junction of the lower section piles and the upper section piles is 1±0.1 meters from the ground; the lower section piles and the upper section piles are welded and fixed by a pad iron; the pile caps are arranged on the piles of the upper section piles top of the head.

Preferably, the pile cap is cast-in-place reinforced concrete; the connecting piece includes a steel backing plate, a bolt and a nut matched therewith, the steel backing plate is pre-buried in the pile cap, and the bolt pre-penetrates the steel backing The plate is welded and fixed with it, and the exposed ends of the bolts are connected with the honeycomb beam assembly and are screwed and fixed with the nut.

The beneficial effects of adopting the above technical scheme are: compared with the prior art, the utility model has the advantages of simple structure and convenient and quick operation; it can be widely used in a variety of unfavorable geological conditions, and is suitable for geological conditions with large fluctuations in the bearing layer. The conditions can also be well applied; good integrity, high structural rigidity, and low self-weight can effectively control the foundation settlement and ensure the production quality of box girder; high degree of mechanized construction, easy to control construction quality; honeycomb beam components can be reused, avoiding the need for The demolition work fundamentally solves the problem of re-cultivation of the site in the later stage, reduces environmental pollution, and realizes green construction without building a concrete mixing plant in the early stage of construction, reducing the investment of large-scale equipment and manual investment in the early stage; the site does not need to excavate foundation pits , No concrete is poured, the site is clean, the cost is low, the construction period is short, and the construction is completed and put into production ahead of schedule, which will generate huge economic and social value.

Description of drawings

1 is a front view of a high-speed railway beam-making pedestal suitable for poor geology provided by an embodiment of the present utility model;

Fig. 2 is the top view of Fig. 1;

Fig. 3 is the left side view of Fig. 1;

Fig. 4 is the front view of the end honeycomb beam in Fig. 1;

Fig. 5 is the sectional view of the end honeycomb beam in Fig. 4;

Fig. 6 is the front view of the standard section honeycomb beam in Fig. 1;

Fig. 7 is the sectional view of the standard section honeycomb beam in Fig. 6;

Fig. 8 is the structural representation of the connector in Fig. 1;

In the figure: 1-end honeycomb beam; 2-standard section honeycomb beam; 3-pipe pile; 4-connector; 5-transverse connecting beam; 6-upper flange plate; 7-lower flange plate; 8-web plate; 9-polygonal hole; 10-connection; 11-rib; 12-steel backing plate; 13-bolt; 14-nut.

Detailed ways

The technical solutions in the embodiments of the present utility model will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all the implementations. example. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative work fall within the protection scope of the present invention.

As shown in Figure 1-3, a high-speed railway beam-making pedestal suitable for poor geology includes more than two rows of pipe pile foundations, each row of pipe pile foundations includes a plurality of pipe piles 3 arranged at intervals, and each row of pipe pile foundations Honeycomb beam assemblies are erected on both sides, and multiple rows of honeycomb beam assemblies are arranged side by side and are connected to the pipe piles 3 through connectors 4 ; two adjacent honeycomb beam assemblies are connected by transverse connecting beams 5 . Wherein, the honeycomb beam assembly includes end honeycomb beams 1 at both ends and a plurality of standard section honeycomb beams 2 connected in sequence in the middle. The junctions of the beams 2 are all set on the pipe piles 3 , and the ends of the end honeycomb beams 1 and the standard section honeycomb beams 2 are fixedly connected to the pipe piles 3 through the connecting piece 4 .

In a specific embodiment of the present invention, as shown in FIGS. 4-7 , the end honeycomb beam 1 includes an upper flange plate 6 , a lower flange plate 7 and two webs 8 . The two webs 8 Arranged side by side between the upper flange plate 6 and the lower flange plate 7, the middle of the two webs 8 are horizontally juxtaposed with polygonal holes 9; the standard section honeycomb beam 2 is I-shaped, and the standard section honeycomb The beam 2 includes an upper flange plate 6 , a lower flange plate 7 and a web 8 arranged between the upper flange plate 6 and the lower flange plate 7 , and a polygonal hole 9 is arranged horizontally in the middle of the web 8 .

The above technical solution is further optimized. As shown in Figures 4 and 6, the end honeycomb beam 1 and the outer side of the web 8 of the standard section honeycomb beam 2 are vertically provided with rib plates 11, and between two adjacent rib plates 11 Two polygonal holes 9 are arranged on the web 8, and the rib 11 is arranged between the adjacent two polygonal holes 9 on the web 8; the rib 11 provided at the end of the end honeycomb beam 1 and its end A connecting part 10 is reserved between the two ends of the horizontal connecting beam 5, and the two ends of the horizontal connecting beam 5 are matched with the connecting part 10 and the adjacent rib plate 11, that is, the two ends of the horizontal connecting beam 5 are connected with the connecting part 10 and its adjacent rib plate at the same time. fixed. In addition, an adjustment steel plate can be set on the top of the upper flange plate, and the adjustment steel plate and the upper flange plate are connected by bolts. Debug time.

In order to ensure the overall stability of the honeycomb beam assembly, both sides of the longitudinal junction between the end honeycomb beam 1 and the standard section honeycomb beam 2 and between the adjacent standard section honeycomb beams 2 are connected by splicing plates.

In a specific embodiment of the present invention, as shown in FIGS. 2 and 3 , the transverse connecting beam 5 includes two rows of I-beams, and the two rows of I-beams are arranged side by side between the adjacent end honeycomb beams 1 And between the adjacent standard section honeycomb beams 2, the I-beam is perpendicular to the end honeycomb beams 1 and the standard section honeycomb beams 2.

In a specific embodiment of the present invention, the pipe pile 3 is a PHC pipe pile (prestressed high-strength concrete pipe pile), the PHC pipe pile is formed in a split type, and the PHC pipe pile includes a pile body and a For the pile cap connected to the connector, the pile body includes a lower section pile and an upper section pile, and the junction of the lower section pile and the upper section pile is about 1 meter away from the ground (floating up and down by 0.1 meters); The pile and the upper section pile are welded and fixed by a pad iron; the pile cap is arranged on the top of the pile head of the upper section pile. Among them, the PHC pipe pile foundation with a diameter of 0.4m and a pile length of 20m is used at both ends, and the PHC pipe pile foundation with a diameter of 0.4m and a pile length of 15m is used in the middle section. According to the construction progress requirements and various comparisons, the pipe pile construction adopts the static pressure method. .

Wherein, the pile cap is cast-in-place reinforced concrete; as shown in Figures 1 and 8 , the connector 4 includes a steel backing plate 12, a bolt 13 and a nut 14 matched therewith, and the steel backing plate 12 is pre-buried In the pile cap, the bolts 13 penetrate the steel backing plate 12 in advance and are fixed by welding, and the exposed ends of the bolts 13 penetrate the lower flange plate 7 of the honeycomb beam assembly and are threadedly connected to the nut 14 .

Since PHC pipe piles are hollow cylindrical pretensioned prestressed reinforced concrete precast piles, they were mostly used in soft soil foundation projects in coastal areas in the past. To meet the needs of use, the use of PHC pipe piles (high-strength prestressed concrete pipe piles) as the foundation for making beams and pedestals is a new soft foundation treatment method in recent years, and is widely used in large-scale domestic railway projects, and the construction technology is gradually improved. . In the future, bridge construction should pay more attention to technological innovation, to implement the concept of green environmental protection in bridge engineering, and to pay more attention to the refined design and construction of bridges.

The above-mentioned construction method for the high-speed railway beam pedestal suitable for poor geology includes the following steps:

(1) Leveling the site: To meet the requirements of measurement, lay-out and construction, according to the general layout plan of the prefabricated beam yard, carry out construction measurement and mark the 3 pile positions of the pipe pile, and then carry out the construction pile position.

According to the geological survey data of Liangchang, the strata in the Liangchang area are divided into several engineering geological layers: cultivated soil, silty clay, fine sand and weathered mudstone from top to bottom. Clean up the site in the preset area, determine the position of the pile foundation for construction measurement and make a mark, and then place the pile at the construction pile position. The deviation of the pile position shall not be greater than 10mm.

(2) Pipe piles in place: the piling equipment enters the site, and after installation and debugging, move the machine to the pile position, and transport the qualified pipe piles to the pile driving point; hammer (or static pressure) pile driving, press The design requires pile connection and pile delivery.

The specific pile sinking steps are as follows:

(1) After the piling equipment enters the site for installation and debugging, move it to the position where it needs to be driven, start the platform outrigger cylinder of the piling equipment, and adjust the level;

(2) Lift the lower section pile so that the tip of the pile is vertically aligned with the center of the pile position, slowly lower it into the soil, number it according to the principle of first inside, then outside, first in the middle and then both sides, and press the pile in the order of numbering. To control the pressure application speed, record the pressure value of the pressure gauge every two meters of soil in detail;

(3) Stop pressing the pile when the pile head of the lower section pile is about one meter away from the ground, and the crane lifts the upper section pile and starts to align the piles; The gap between them should be tightly welded with iron gaskets, and symmetrical welding should be adopted during welding to reduce the bending of the joints caused by the deformation of the welding seam;

(4) After the static pressure pile driving is completed, the pile pressing shall be terminated, and the pile quality inspection shall be carried out according to the quality acceptance standard of the finished pile.

(3) Pile cap pouring of pipe piles: pour reinforced concrete pile caps after the pile inspection, pre-embed the steel backing plate 12 of the connector in the pile cap according to the design requirements of the drawings, and weld the steel backing plate 12 of the bolt 13 to the pipe pile The pile heads of 3 are all welded together; the steel backing plate is a 480mm×480mm steel plate, and a total of 4 bolts with a diameter of 20mm are arranged.

(4) Installation of honeycomb beam components: After the maintenance of the three pedestals of the pipe piles is completed, the honeycomb beam components are assembled. Place the end honeycomb beam 1 and a plurality of standard section honeycomb beams 2 according to the drawings, and the ends of the end honeycomb beam 1 and the standard section honeycomb beam 2 are connected and fixed with the pipe pile 3 through the connector 4; the adjacent two rows of honeycomb beam components They are connected and fixed by transverse connecting beams 5. In the embodiment shown in Figure 2, there are three rows of honeycomb beam assemblies, and the length of each longitudinal row of honeycomb beam assemblies is end honeycomb beam + n standard section honeycomb beam + end honeycomb beam=4.25m+n*5m+4.25m .

Among them, the end honeycomb beam 1 and the standard section honeycomb beam 2 are connected with the pipe pile foundation by bolts 13, and the longitudinal direction between the end honeycomb beam 1 and the standard section honeycomb beam 2 and between two adjacent standard section honeycomb beams 2 Through the butt connection of double-sided splicing plates, the transverse connecting beam 5 is connected and fixed by two upper and lower I-beams to maintain stability.

The advantages of the utility model different from the prior art are:

(1) Compared with the same diameter immersed cast-in-place piles, bored cast-in-place piles and artificial digging piles, the factory prefabricated PHC pipe piles have high bearing capacity design values and reliable quality, and can be widely used in silty clay, seasonal frozen piles, etc. Soil, collapsible loess and other unfavorable geological conditions can also be well applied to the geological conditions with large fluctuations in the bearing layer and including weak intermediate layers. Therefore, the use of PHC pipe piles instead of traditional pile foundations has the advantages of convenient transportation and hoisting, quick pile connection, high degree of mechanized construction, simple operation and easy control of construction quality.

(2) The beam-making pedestal formed by the assembly of the PHC pipe pile and the honeycomb beam assembly has good integrity and high structural rigidity, which can effectively control the foundation settlement and ensure the production quality of the beam-making pedestal. The reuse of honeycomb beam components avoids the dismantling of the pedestal foundation, fundamentally solves the technical problem of site restoration in the later stage, reduces environmental pollution, and realizes green construction.

(3) Adjusting steel plates can be directly placed on the top of the upper flange plate of the honeycomb beam assembly to adjust the reverse camber of the honeycomb beam assembly, which ensures the debugging accuracy and shortens the debugging time.

(4) The beam-making pedestal formed by the assembly of PHC pipe piles and honeycomb beam components does not require excavation of foundation pits, no concrete pouring, no maintenance period, clean site, fast construction speed, low cost, short construction period, and completed and put into production ahead of schedule. It will produce huge economic and social value.

(5) The beam-making pedestal assembled with PHC pipe piles and honeycomb beam components can not build a concrete mixing station in the early stage of construction, which reduces the construction and production pressure of the concrete mixing station in the early stage, and reduces the investment of large-scale equipment and labor in the early stage. Easy to manage.

To sum up, the beam-making pedestal provided by the present utility model has the following advantages and positive effects:

The beam-making pedestal can be widely used in silt clay, seasonal frozen soil, collapsible loess and other unfavorable geological conditions. The beam-making pedestal assembled from the pipe pile and the honeycomb beam assembly has good integrity, high structural rigidity and low self-weight, which can effectively control the foundation settlement and ensure the production quality of the box beam; prefabricated PHC pipe piles and customized end honeycomb beams and standard The section of honeycomb beam is convenient for transportation and hoisting, quick to connect piles, high degree of mechanized construction, simple operation, and easy to control construction quality; the reuse of honeycomb beam components avoids the dismantling of the pedestal foundation, and fundamentally solves the technology of re-cultivation in the later stage. It reduces environmental pollution and realizes green construction; the adjustment steel plate is placed on the top of the upper flange plate of the honeycomb beam assembly, which can shorten the pre-camber debugging time; the polygonal hole in the middle of the honeycomb beam of the standard section allows the staff to enter the bottom of the box beam , It is convenient and quick to operate, and the hole size can be customized according to requirements. In addition, it is not necessary to build a concrete mixing plant in the early stage of construction, which reduces the construction and production pressure of the concrete mixing plant in the early stage, reduces the input of large-scale equipment and labor in the early stage, and facilitates management; there is no need to excavate foundation pits, pour concrete, and Maintenance cycle, clean site, fast construction speed, low cost, short construction period, and early completion and production will generate huge economic and social value.

In the above description, many specific details are set forth in order to fully understand the present utility model, but the present utility model can also be implemented in other ways different from those described herein, and those skilled in the art can do so without departing from the connotation of the present utility model. Therefore, the present invention is not limited by the specific embodiments disclosed above.

Claims (8)

1. The utility model provides a high-speed railway system beam pedestal suitable for unfavorable geology which characterized in that: the device comprises more than two rows of pipe pile foundations, wherein each row of pipe pile foundations comprises a plurality of pipe piles arranged at intervals, a honeycomb beam assembly is erected on each row of pipe pile foundations, and a plurality of rows of honeycomb beam assemblies are arranged in parallel and connected with the pipe piles through connecting pieces; every two adjacent honeycomb beam assemblies are connected through a plurality of transverse connecting beams arranged at intervals.

2. A high speed railway beam forming pedestal adapted for use in unfavorable geology as set forth in claim 1, wherein: the utility model discloses a tubular pile, including the tip honeycomb roof beam at both ends and the middle a plurality of standard section honeycomb roof beams that link to each other in proper order of honeycomb roof beam subassembly, tip honeycomb roof beam all sets up on the tubular pile with juncture of standard section honeycomb roof beam, juncture of adjacent standard section honeycomb roof beam, tip honeycomb roof beam all links to each other with the tubular pile is fixed through the connecting piece with the tip of standard section honeycomb roof beam.

3. A high speed railway beam forming pedestal adapted for use in unfavorable geology as set forth in claim 2, wherein: the end honeycomb beam comprises an upper flange plate, a lower flange plate and two webs, the two webs are arranged between the upper flange plate and the lower flange plate in parallel, and polygonal holes are horizontally arranged in parallel in the middles of the two webs; the standard section honeycomb beam is I-shaped, the standard section honeycomb beam comprises an upper flange plate, a lower flange plate and a web plate arranged between the upper flange plate and the lower flange plate, and polygonal holes are horizontally arranged in the middle of the web plate in parallel.

4. A high speed railway beam forming pedestal adapted for use in unfavorable geology as set forth in claim 3, wherein: ribbed plates are vertically arranged on the outer sides of the webs of the end honeycomb beam and the standard section honeycomb beam at intervals; and a connecting part is reserved between the rib plate arranged at the end part of the end honeycomb beam and the tail end of the end honeycomb beam, and two ends of the transverse connecting beam are matched with the connecting part and the adjacent rib plate.

5. A high speed railway beam forming pedestal adapted for use in unfavorable geology as set forth in claim 2, wherein: and the two sides of the longitudinal junction between the end honeycomb beam and the standard section honeycomb beam and between the end honeycomb beam and the adjacent standard section honeycomb beam are connected through splice plates.

6. A high speed railway beam forming pedestal adapted for use in unfavorable geology as set forth in claim 2, wherein: the transverse connecting beam comprises two rows of I-shaped steel, the two rows of I-shaped steel are arranged between adjacent end honeycomb beams and between adjacent standard section honeycomb beams in parallel up and down, and the I-shaped steel is perpendicular to the end honeycomb beams and the standard section honeycomb beams.

7. A high speed railway girder fabrication bench adapted for use in unfavorable geology according to any one of claims 1 to 6, wherein: the pipe pile is a PHC pipe pile, the PHC pipe pile is formed in a split mode, the PHC pipe pile comprises a pile body and a pile cap used for being connected with a connecting piece, the pile body comprises a lower pile section and an upper pile section, and the distance between the junction of the lower pile section and the upper pile section and the ground is 1 +/-0.1 m; the lower pile section and the upper pile section are welded and fixed through sizing blocks; the pile cap is arranged at the top of the pile head of the upper section of pile.

8. A high speed railway beam forming pedestal adapted for use in unfavorable geology as set forth in claim 7, wherein: the pile cap is cast-in-place reinforced concrete; the connecting piece includes steel backing plate, bolt and complex nut with it, the steel backing plate is pre-buried in the pile cap, the bolt runs through the steel backing plate in advance and welded fastening with it, the end that exposes of bolt links to each other with the honeycomb roof beam subassembly, and is fixed with nut threaded connection.

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