CN211898520U - Large-tonnage crawler crane combined type foundation - Google Patents
Large-tonnage crawler crane combined type foundation Download PDFInfo
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- CN211898520U CN211898520U CN202020132197.5U CN202020132197U CN211898520U CN 211898520 U CN211898520 U CN 211898520U CN 202020132197 U CN202020132197 U CN 202020132197U CN 211898520 U CN211898520 U CN 211898520U
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Abstract
The utility model relates to a large-tonnage crawler crane combined type basis, include: drilling cast-in-place piles, concrete cushions and rafts; the operation activity area of the large-tonnage crawler crane is close to the railway business line. The utility model has the advantages that: the utility model adopts the combined pile-raft foundation of the cast-in-situ bored pile and the section steel to reinforce the operation activity area of the large-tonnage crawler crane, can improve the bearing capacity of the foundation to the maximum extent, reduce the settlement of the foundation and reduce the adverse effect on the railway business line, and simultaneously adopts the section steel positioning system to realize the accurate positioning of the section steel; the utility model widens the platform, adopts the assembled retaining wall for protection, expands the effective working surface for the operation of a large-tonnage crawler crane, and ensures the stability and the safety of a construction site; the assembled retaining wall is prefabricated by a factory and assembled in a splicing mode on site, and meanwhile, the assembled retaining wall is easy to disassemble and can be recycled for multiple times, and the assembled retaining wall has the advantages of simplicity, high efficiency and environmental friendliness.
Description
Technical Field
The utility model belongs to the building engineering field, concretely relates to large-tonnage crawler crane combined type basis.
Background
In recent years, with the rapid development of national railways, the passing amount of trains is larger and larger, the original station can not receive a plurality of trains for stopping at the same time, and the number of stations can not meet the requirement. In order to solve the problem, stations in the whole country expand original stations, and meanwhile, normal operation of station yards is guaranteed. The pedestrian overpass for crossing a plurality of railway business lines downwards usually selects a large span because of large railway traffic flow, complex surrounding environment and few selectable pier stud positions, and simultaneously, in order to ensure the normal operation of railway trains, the allowed construction time for crossing the business lines is short, and the integral hoisting mode is usually adopted.
The steel truss overpass has the advantages of large span, high section and large weight, the self weight of the crane comprises large counter weight behind the crane when hoisting, the requirement on the bearing capacity of the foundation of a large-tonnage crawler crane action activity area is higher, and the influence of settlement on a railway business line is particularly required to be noticed. In view of this, to overcome the defects in the conventional crawler crane foundation construction process, a large-tonnage crawler crane composite foundation is urgently needed, so that the foundation settlement of the large-tonnage crawler crane action activity area is reduced as much as possible on the premise of ensuring the working safety of the crawler crane, the construction safety and reliability are ensured, and the efficiency and the quality of the large-tonnage crawler crane composite foundation construction are improved.
SUMMERY OF THE UTILITY MODEL
The utility model aims at overcoming not enough among the prior art, providing a large-tonnage crawler crane combined type basis to reduce the ground as far as possible and subside, ensure the safe and reliable of construction, improve the efficiency and the quality of large-tonnage crawler crane combined type basis construction.
The large-tonnage crawler crane combined foundation comprises a cast-in-situ bored pile, a concrete cushion and a raft; the operation activity area of the large-tonnage crawler crane is close to a railway business line, and a bored pile is arranged in the operation activity area of the large-tonnage crawler crane; the pile top of the cast-in-situ bored pile penetrates through the concrete cushion and enters the raft; the cast-in-situ bored pile is a combined pile of reinforced concrete and profile steel, a reinforcement cage is arranged in the cast-in-situ bored pile, the reinforcement cage comprises a main reinforcement, a stiffening hoop and a stirrup, and the reinforcement cage is provided with a stirrup encryption area in the pile top area of the cast-in-situ bored pile; the section steel is welded H-shaped steel.
Preferably, the method comprises the following steps: the section steel is positioned by a section steel positioning system formed by combining a steel casing and a steel plate, and the section steel positioning system is fixed at an orifice of the cast-in-situ bored pile; a plurality of cylinder protection lug plates are welded at the top and the bottom of the steel cylinder, holes are reserved at corresponding positions of the steel plate, and the steel cylinder and the steel plate are fixedly positioned through high-strength bolts; the steel plate of steel casing top and bottom all reserves the shaped steel hole that matches with the shaped steel size, and the position in two shaped steel holes aligns, and shaped steel passes the shaped steel hole and inserts in the drilling bored concrete pile.
Preferably, the method comprises the following steps: the prefabricated retaining wall is composed of a prefabricated column, a shallow-buried strip foundation and an inclined strut, wherein a sandwich profiled steel plate is arranged in the prefabricated column, extends out of the bottom of the prefabricated column for a certain distance and is inserted into a reserved groove of the shallow-buried strip foundation; the sandwich profiled steel sheet is welded with a positioning lug plate at the bottom of the prefabricated column and is fixed through an expansion bolt pre-buried in the shallow strip foundation; the prefabricated column is also provided with a connecting lug plate and is connected with the top of the inclined strut through a high-strength bolt, and the bottom of the inclined strut is hinged on the fixed support.
Preferably, the method comprises the following steps: the concrete cushion layer is made of plain concrete, and the thickness of the concrete cushion layer is 100-150 mm; the raft plate is of a reinforced concrete structure, the thickness of the raft plate is 600-700 mm, and the thickness of a concrete protective layer of a reinforced bar is not less than 50 mm; the thickness of the raft plate entering the cast-in-situ bored pile is not less than 100 mm.
The utility model has the advantages that:
(1) the utility model discloses a combined type pile raft basis of bored concrete pile and shaped steel combination consolidates large-tonnage crawler crane operation activity area, and the bearing capacity of improvement ground that can furthest reduces the ground and subsides, reduces the harmful effects to the railway business line, adopts shaped steel positioning system simultaneously, can realize the accurate location of shaped steel.
(2) The utility model widens the platform, adopts the assembled retaining wall for protection, expands the effective working surface for the operation of a large-tonnage crawler crane, and ensures the stability and the safety of a construction site; the assembled retaining wall is prefabricated by a factory and assembled in a splicing mode on site, and meanwhile, the assembled retaining wall is easy to disassemble and can be recycled for multiple times, and the assembled retaining wall has the advantages of simplicity, high efficiency and environmental friendliness.
Drawings
FIG. 1 is a layout view of a composite foundation of a large-tonnage crawler crane of the present invention;
FIG. 2 is a schematic view of a bored pile-raft composite foundation;
FIG. 3 is a greatly enlarged view of section A-A in FIG. 2;
FIG. 4 is a schematic view of a section steel positioning system;
fig. 5 is a schematic view of an assembled retaining wall protection structure.
Description of reference numerals: the method comprises the following steps of 1-railway business line, 2-large-tonnage crawler crane operation activity area, 3-drilling cast-in-place pile, 4-existing slope, 5-concrete cushion, 6-raft, 7-main rib, 8-stiffening hoop, 9-stirrup, 10-stirrup encryption area, 11-steel reinforcement cage, 12-section steel, 13-steel casing, 14-steel plate, 15-section steel hole, 16-casing lug plate, 17-high-strength bolt, 18-prefabricated column, 19-sandwich profiled steel plate, 20-shallow buried strip foundation, 21-positioning lug plate, 22-expansion bolt, 23-connecting lug plate, 24-diagonal brace, 25-fixed support and 26-soil body.
Detailed Description
The present invention will be further described with reference to the following examples. The following description of the embodiments is merely provided to aid in understanding the invention. It should be noted that, for those skilled in the art, without departing from the principle of the present invention, the present invention can be further modified and modified, and such modifications and modifications also fall within the protection scope of the appended claims.
As shown in fig. 1-5, in the large-tonnage crawler crane combined foundation, a large-tonnage crawler crane operation activity area 2 is close to a railway business line 1, a bored pile-raft foundation is adopted to reinforce the foundation of the large-tonnage crawler crane operation activity area 2, meanwhile, an existing side slope 4 is removed, a platform is widened, and the widened platform is protected by an assembled retaining wall;
the large-tonnage crawler crane combined type foundation comprises a cast-in-situ bored pile 3, a concrete cushion 5 and a raft 6; the concrete cushion layer 5 is made of C15 plain concrete, and the thickness is 100-150 mm; the raft 6 is of a reinforced concrete structure, the thickness of the raft is 600-700 mm, and the thickness of a concrete protective layer of a reinforcing steel bar is not less than 50 mm; the pile top of the cast-in-situ bored pile 3 penetrates through the concrete cushion 5, and the thickness of the cast-in-situ bored pile entering the raft 6 is not less than 100 mm;
the cast-in-situ bored pile 3 is a combined pile of reinforced concrete and section steel 12, wherein the concrete is C30 concrete, the reinforcement cage 11 comprises a main reinforcement 7, a stiffening hoop 8 and a stirrup 9, and a stirrup encryption area 10 is arranged in the pile top area of the cast-in-situ bored pile 3 so as to improve the bearing capacity of the cast-in-situ bored pile 3; the section steel 12 is welded H-shaped steel.
Further, the section steel 12 is positioned through a section steel positioning system formed by combining a steel casing 13 and a steel plate 14, and the section steel positioning system is fixed at the orifice of the cast-in-situ bored pile 3 and ensures the level of the cast-in-situ bored pile; a plurality of pile casing ear plates 16 are welded at the top and the bottom of the steel pile casing 13, holes are reserved at corresponding positions of the steel plate 14, and the steel plate is fixed and positioned through high-strength bolts 17; the steel plate 14 of the steel casing 13 top and bottom all reserves the shaped steel hole 15 that matches with shaped steel 12 size, and ensures that the position of two shaped steel holes 15 is accurate aligns, inserts shaped steel 12 in bored concrete pile 3 through the hoist and mount.
Furthermore, the large-tonnage crawler crane combined foundation also comprises an assembled retaining wall, wherein the assembled retaining wall consists of a prefabricated column 18, a shallow-buried strip foundation 20 and an inclined strut 24, a sandwich profiled steel plate 19 is arranged in the prefabricated column 18, and the sandwich profiled steel plate 19 extends out of the bottom of the prefabricated column 18 for a certain distance and is inserted into a reserved groove of the shallow-buried strip foundation 20; the sandwich profiled steel sheet 19 is welded with a positioning ear plate 21 at the bottom of the prefabricated column 18 and is fixed by an expansion bolt 22 pre-buried in a shallow strip foundation 20; the prefabricated column 18 is further provided with a connecting lug plate 23 which is connected with the top of an inclined strut 24 through a high-strength bolt 17, and the bottom of the inclined strut 24 is hinged on a fixed support 25, so that the prefabricated column 18 is reliably supported.
Claims (4)
1. The utility model provides a large-tonnage crawler crane combined type basis which characterized in that: comprises a cast-in-situ bored pile (3), a concrete cushion (5) and a raft (6); the large-tonnage crawler crane operation activity area (2) is close to the railway business line (1), and a cast-in-situ bored pile (3) is arranged in the large-tonnage crawler crane operation activity area (2); the pile top of the cast-in-situ bored pile (3) penetrates through the concrete cushion (5) and enters the raft (6); the cast-in-situ bored pile (3) is a combined pile of reinforced concrete and section steel (12), a reinforcement cage (11) is arranged in the cast-in-situ bored pile (3), the reinforcement cage (11) comprises a main reinforcement (7), a stiffening hoop (8) and a stirrup (9), and a stirrup encryption area (10) is arranged in the pile top area of the cast-in-situ bored pile (3) of the reinforcement cage (11); the section steel (12) adopts welded H-shaped steel.
2. The large-tonnage crawler crane compound foundation of claim 1, wherein: the section steel (12) is positioned through a section steel positioning system formed by combining a steel casing (13) and a steel plate (14), and the section steel positioning system is fixed at an orifice of the cast-in-situ bored pile (3); a plurality of pile casing lug plates (16) are welded at the top and the bottom of the steel pile casing (13), holes are reserved at corresponding positions of the steel plate (14), and the steel pile casing (13) and the steel plate (14) are fixedly positioned through high-strength bolts (17); the steel plates (14) at the top and the bottom of the steel casing (13) are reserved with steel section holes (15) matched with the sizes of the steel sections (12), the positions of the two steel section holes (15) are aligned, and the steel sections (12) penetrate through the steel section holes (15) and are inserted into the cast-in-situ bored pile (3).
3. The large-tonnage crawler crane compound foundation of claim 1, wherein: the prefabricated retaining wall is composed of prefabricated columns (18), a shallow buried strip foundation (20) and inclined struts (24), wherein sandwich profiled steel plates (19) are arranged in the prefabricated columns (18), and the sandwich profiled steel plates (19) extend out of the bottoms of the prefabricated columns (18) for a certain distance and are inserted into reserved grooves of the shallow buried strip foundation (20); the sandwich profiled steel sheet (19) is welded with a positioning ear plate (21) at the bottom of the prefabricated column (18) and is fixed through an expansion bolt (22) pre-buried in a shallow strip foundation (20); the prefabricated column (18) is also provided with a connecting lug plate (23) and is connected with the top of an inclined strut (24) through a high-strength bolt (17), and the bottom of the inclined strut (24) is hinged on a fixed support (25).
4. The large-tonnage crawler crane compound foundation of claim 1, wherein: the concrete cushion layer (5) is made of plain concrete, and the thickness of the concrete cushion layer is 100-150 mm; the raft (6) is of a reinforced concrete structure, the thickness of the raft is 600-700 mm, and the thickness of a concrete protective layer of a reinforcing steel bar is not less than 50 mm; the thickness of the cast-in-situ bored pile (3) entering the raft (6) is not less than 100 mm.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202020132197.5U CN211898520U (en) | 2020-01-20 | 2020-01-20 | Large-tonnage crawler crane combined type foundation |
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| CN202020132197.5U CN211898520U (en) | 2020-01-20 | 2020-01-20 | Large-tonnage crawler crane combined type foundation |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113431082A (en) * | 2021-05-27 | 2021-09-24 | 中电建铁路建设投资集团有限公司 | Fast-assembly retaining wall structure and construction method thereof |
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- 2020-01-20 CN CN202020132197.5U patent/CN211898520U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113431082A (en) * | 2021-05-27 | 2021-09-24 | 中电建铁路建设投资集团有限公司 | Fast-assembly retaining wall structure and construction method thereof |
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