CN211849561U

CN211849561U - Railway bridge open caisson protection foundation

Info

Publication number: CN211849561U
Application number: CN202020085434.7U
Authority: CN
Inventors: 周外平; 周恩海; 陈敏; 刘满意; 范红波; 张亚龙; 吴必涛
Original assignee: Individual
Current assignee: Individual
Priority date: 2020-01-15
Filing date: 2020-01-15
Publication date: 2020-11-03
Anticipated expiration: 2030-01-15

Abstract

The utility model belongs to the technical field of the railway bridge maintenance and protection maintenance technique and specifically relates to a railway bridge open caisson protection basis. This railway bridge open caisson protection basis includes soil layer, drilling bored concrete pile, protection open caisson, pier cushion cap and pier, the drilling bored concrete pile is squeezed into inside the soil layer, the pier cushion cap sets up tells the upper portion of drilling bored concrete pile, the pier sets up on the pier cushion cap, the protection open caisson cup joints the pier cushion cap with the outside of drilling bored concrete pile, the protection open caisson is regular hexagon, the bottom of protection open caisson is provided with interior oblique cutting edge angle, the height of protection open caisson is 7 meters, the bottom of protection open caisson is provided with C20 concrete back cover, the upper portion of protection open caisson is provided with C20 concrete back cover, the protection open caisson with it has the slag mixture layer to fill between the drilling bored concrete pile, the protection open caisson upper surface is located the below of pier cushion cap upper surface.

Description

Railway bridge open caisson protection foundation

Technical Field

The utility model belongs to the technical field of the railway bridge maintenance and protection maintenance technique and specifically relates to a railway bridge open caisson protection basis.

Background

Along with the increase of railway technology and railway mileage, simultaneously, when the railway passes through the river, must adopt the technique of bridge to realize the traffic, but current railway bridge all can appear the condition of the long-term maintenance after using for many years, and the use of bridge is dangerous when then, influences personnel's safety. In general, since the bridge pier portion of a bridge may be corroded, the reinforcing bars may be exposed, or the bridge pier portion may be inclined due to continuous rain wash, it is necessary to protect the bridge pier and the like.

SUMMERY OF THE UTILITY MODEL

The utility model aims at providing a simple structure, the principle is succinct, use extensively and can effectively protect the railway bridge open caisson protection basis on railway bridge basis.

The utility model provides a railway bridge open caisson protection basis, includes soil layer, drilling bored concrete pile, protection open caisson, pier cushion cap and pier, the drilling bored concrete pile is squeezed into inside the soil layer, the pier cushion cap sets up tells the upper portion of drilling bored concrete pile, the pier sets up on the pier cushion cap, the protection open caisson cup joints the pier cushion cap with the outside of drilling bored concrete pile, the protection open caisson is regular hexagon, the bottom of protection open caisson is provided with interior oblique cutting edge angle, the height of protection open caisson is 7 meters, the bottom of protection open caisson is provided with C20 concrete back cover, the upper portion of protection open caisson is provided with C20 concrete back cover, the protection open caisson with it has slag mixing layer to fill between the drilling bored concrete pile, the protection open caisson upper surface is located the below of pier cushion cap upper surface.

Preferably, the protection open caisson is of a reinforced concrete structure, and transverse steel bars, longitudinal steel bars and stirrups are arranged inside the protection open caisson.

Preferably, the soil layers comprise a coarse medium sand layer, a pebble soil layer, a strongly weathered gravel-containing layer and a strongly weathered gravel-containing layer, and the coarse medium sand layer, the pebble soil layer, the strongly weathered gravel-containing layer and the strongly weathered gravel-containing layer are arranged from top to bottom once.

Preferably, the lower part of each pier bearing platform is provided with four cast-in-place bored piles, and the diameter of each cast-in-place bored pile is 1 meter.

The utility model discloses the beneficial effect who brings is:

the utility model discloses in, through the formula of sinking protection of protection open caisson to fill in the open caisson and mix the sediment, realized the guard action to being in below the surface of water and receiving the washout face, formed one deck protection basis.

Drawings

The present invention will be described in further detail with reference to the accompanying drawings.

Fig. 1 is a sectional view of a protection foundation for a sinking well of a railroad bridge according to a preferred embodiment of the present invention.

Fig. 2 is a schematic structural diagram of a protection open caisson according to a preferred embodiment of the present invention.

Fig. 3 is a cross-sectional view of the protection open caisson provided by the preferred embodiment of the present invention.

The corresponding reference numbers for the component names in the figures are as follows:

1. a soil layer; 2. drilling a cast-in-place pile; 3. protecting the open caisson; 4. a pier bearing platform; 5. a bridge pier; 6. an inner beveled edge angle; 7. c20 concrete back cover; 8. c20 capping the concrete; 9. a slag mixing layer; 10. transverse reinforcing steel bars; 11. reinforcing steel bars; 12. hooping; 13. coarse medium sand layer; 14. a pebble soil layer; 15. a strongly weathered gravel-containing sandstone layer; 16. a stroke induced gravel-containing sandstone layer.

Detailed Description

The present invention will be described in detail with reference to the accompanying drawings and embodiments:

as an embodiment of the protection foundation for the open caisson of the railroad bridge of the present invention, as shown in fig. 1-3, the protection foundation comprises a soil layer 1, a cast-in-situ bored pile 2, a protection open caisson 3, a pier bearing platform 4 and a pier 5, wherein the cast-in-situ bored pile 2 is driven into the soil layer 1, the pier bearing platform 4 is arranged on the upper portion of the cast-in-situ bored pile 2, the pier 5 is arranged on the pier bearing platform 4, the protection open caisson 3 is sleeved on the pier bearing platform 4 and the outer side of the cast-in-situ bored pile 2, the protection open caisson is additionally arranged on the outer side of the pier bearing platform, the pier bearing platform and the cast-in-situ bored pile can be effectively protected from erosion and corrosion, the protection open caisson 3 is a regular hexagon, the bottom of the protection open caisson 3 is provided with an inner oblique cutting edge angle 6, the height of the protection open caisson 3 is 7 meters, the bottom of the protection open caisson 3 is provided with a C20, the upper portion of protection open caisson 3 is provided with C20 concrete capping 8, it has muddy sediment layer 9 to fill between protection open caisson 3 and the bored concrete pile 2, protection open caisson 3 upper surface is located the below of pier cushion cap 4 upper surface.

In this embodiment, the protection open caisson 3 is of a reinforced concrete structure, and is internally provided with transverse steel bars 10, longitudinal steel bars 11 and stirrups 12.

In this embodiment, the soil layer 1 includes a coarse and medium sand layer 13, a pebble soil layer 14, a strongly weathered gravel-containing layer 15, and a strongly weathered gravel-containing layer 16, the coarse and medium sand layer 13, the pebble soil layer 14, the strongly weathered gravel-containing layer 15, and the strongly weathered gravel-containing layer 16 are formed from top to bottom at one time, and the bottom end of the cast-in-situ bored pile is driven into the moderately weathered gravel-containing layer 16, so that the load bearing of the bored pile can be increased as much as possible, and the bored pile is more stable.

In this embodiment, the lower part of every pier cushion cap 4 is provided with four drilling bored concrete piles 2, the diameter of drilling bored concrete pile 2 is 1 meter, and the design here for the pier cushion cap is more firm, more firm.

The utility model discloses a preferred working method, it is not right the utility model discloses any restriction is made to the type, other basis the utility model discloses type technical essence carries out any modification and improvement and transform equivalent structure, all belongs to within the protection scope of type technical scheme the utility model discloses a system of the type is provided with a computer and is used for the computer to be connected with the computer.

The basic principles and the main features of the invention and the advantages of the invention have been shown and described above, it is obvious to a person skilled in the art that the invention is not limited to the details of the above-described exemplary embodiments.

The present invention can be embodied in other specific forms without departing from the spirit or essential characteristics thereof. The present embodiments are therefore to be considered in all respects as illustrative and not restrictive, the scope of the invention being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein.

Furthermore, it should be understood that although the present description refers to embodiments, not every embodiment may contain only a single embodiment, and such description is for clarity only, and those skilled in the art should integrate the description, and the embodiments may be combined as appropriate to form other embodiments understood by those skilled in the art.

Claims

1. The utility model provides a railway bridge open caisson protection basis, its characterized in that includes soil layer, drilling bored concrete pile, protection open caisson, pier cushion cap and pier, the drilling bored concrete pile is squeezed into inside the soil layer, the pier cushion cap sets up tells the upper portion of drilling bored concrete pile, the pier sets up on the pier cushion cap, the protection open caisson cup joints the pier cushion cap with the outside of drilling bored concrete pile, the protection open caisson is regular hexagon, the bottom of protection open caisson is provided with interior corner cut, the height of protection open caisson is 7 meters, the bottom of protection open caisson is provided with C20 concrete back cover, the upper portion of protection open caisson is provided with C20 concrete back cover, the protection open caisson with it has mixed slag layer to fill between the drilling bored concrete pile, the protection open caisson upper surface is located the below of pier cushion cap upper surface.

2. The foundation for protecting a railway bridge caisson according to claim 1, wherein the protection caisson is made of a reinforced concrete structure, and is internally provided with transverse steel bars, longitudinal steel bars and stirrups.

3. The railroad bridge open caisson protection foundation of claim 1, wherein the soil layers comprise coarse and medium sand layers, pebble soil layers, strongly weathered gravel-containing layers, and moderately weathered gravel-containing layers, from top to bottom in one go.

4. The open caisson protection foundation for railroad bridges as claimed in claim 1, wherein the lower part of each pier cap is provided with four cast-in-place bored piles having a diameter of 1 m.