Steel trestle for spur dike pile foundation construction

Abstract

The utility model relates to the technical field of building construction, in particular to a steel trestle for spur dike pile foundation construction. The steel trestle comprises a lower structure, an upper structure and ancillary facilities. The lower structure comprises a plurality of steel pipe piles erected in the direction of the steel trestle and a bearing beam, and bracket plates used for stabilizing and fixing are arranged at the joints of the bearing beam and the steel pipe piles. The upper structure is arranged on the bearing beam and comprises a plurality of bailey beams, and the bailey beams and the bearing beam are connected in a limiting mode through limiters arranged at the connecting positions. An inclined strut structure is arranged between every two adjacent bailey beams, and a distribution beam is arranged at the tops of the multiple bailey beams; the subsidiary facilities are arranged on the distribution beams and comprise shaped bridge deck slabs forming a bridge deck and guardrails used for protection. Compared with a traditional filling earth rock cofferdam, the earth rock requirement is reduced, and land and mineral resources are saved; compared with traditional steel platforms such as steel pipes, profile steel and steel plates, all the structures of the steel trestle are standard units, construction is convenient and fast, and operation is easy.

Description

Technical Field

[0001] The utility model relates to the technical field of building construction, in particular to a steel trestle for groin pile foundation construction. Background Art

[0002] With the continuous development of water conservancy projects, people's requirements for the advancement, safety, reliability and economy of water conservancy construction technology are constantly increasing. Traditional construction methods can no longer meet the requirements of modern construction and corresponding energy-saving standards.

[0003] Traditional spur dike construction in tidal areas often uses large earth-rock cofferdams to create dryland conditions. In a society with increasingly stringent requirements for land resources and environmental protection, earth-rock construction consumes significant land resources, often generates dust pollution during construction, and soil erosion causes water pollution. The post-construction recycling value of the earth and rock is low, and construction costs are high. During spur dike construction, monitoring of cofferdam seepage deformation and underwater slope stability is often overlooked, posing a significant safety hazard.

[0004] Therefore, traditional cofferdam construction can no longer meet the needs of modern construction. Combining the structural characteristics of the spur dike and making full use of the changing patterns of tides in tidal areas, the key is to adopt a more economical, reasonable, safe, reliable and convenient construction platform.

[0005] Therefore, based on the construction characteristics of spur dam pile foundation, it is necessary to comprehensively consider the above construction background and corresponding technical issues, and provide a reliable spur dam construction solution to meet the economic reliability and construction convenience. Summary of the Invention

[0006] In view of the above problems, the present invention provides a steel trestle for spur dam pile foundation construction to solve the problem of large engineering workload and difficulty in recovery in the current traditional construction using cofferdams.

[0007] The technical solutions of the present invention are as follows:

[0008] A steel trestle for spur dam pile foundation construction, the steel trestle comprising a substructure, a superstructure and auxiliary facilities;

[0009] The lower structure includes a plurality of steel pipe piles erected along the direction of the steel trestle, a load-bearing beam is provided on the top of the steel pipe piles, a bracket plate for stable fixation is provided at the connection between the load-bearing beam and the steel pipe piles, a scissor brace for stable connection is provided between adjacent steel pipe piles, and a structural connecting plate is provided at the connection between the scissor brace and the steel pipe piles;

[0010] The upper structure is arranged on the load-bearing beam, including a plurality of Bailey beams arranged on the load-bearing beam, and the Bailey beams and the load-bearing beams are connected to each other by limiters arranged at the connection; a diagonal bracing structure is arranged between adjacent Bailey beams, and a distribution beam is arranged on the top of the plurality of Bailey beams;

[0011] The auxiliary facilities are arranged on the distribution beam, including a shaped bridge deck forming the bridge deck and a guardrail for protection.

[0012] Further preferably, in the lower structure, the steel pipe piles are made of 630*10mm spiral welded pipes, the load-bearing beams are formed by double-jointed 45a welding, the scissors braces are made of [14 channel steel, and the corbel plates and structural connecting plates are cut from 10mm thick Q235B steel plates.

[0013] Further preferably, in the upper structure, the Bailey beam is formed by assembling 321 type Bailey plates and 900 type brackets / 1500 type brackets through pins, the limiter is formed by welding [8 channel steel, the diagonal brace is formed by processing [8 channel steel, and the distribution beam is made of 25a I-beam with a spacing of 750mm.

[0014] Further preferably, in the ancillary facilities, the shaped bridge deck is arranged as a skeleton with longitudinal ribs as the longitudinal direction and transverse ribs as the transverse direction. A 10 mm thick patterned steel plate is arranged on the top of the skeleton. The skeleton is also provided with a fixed connecting plate for fixing it to the distribution beam. End plates are provided at the ends of the skeleton. The longitudinal ribs are made of I-12 I-steel, which are welded with the 10 mm thick patterned steel plate, transverse ribs, fixed connecting plates and end plates to form a standard size.

[0015] Further preferably, in the ancillary facilities, the guardrail consists of columns and cross bars, the columns are formed by welding I-12 I-beams and steel plate bases, the steel plate bases are formed by rolling 10mm steel plates and 4 fastening bolts are arranged on the base, and 4 matching cross bar holes are reserved at the corresponding positions of the webs of the columns.

[0016] Further preferably, the distribution beam and the Bailey beam are fixed by U-bolts and a pressure plate.

[0017] Further preferably, the shaped bridge deck and the distribution beam are fixed by using S-bolts and shoulder beams via the bridge deck fixing connecting plates.

[0018] Further preferably, in the ancillary facilities, positioning holes are provided on the shaped bridge deck and positioning hole stiffening plates are provided in conjunction therewith.

[0019] Compared with the prior art, the present invention has the following beneficial effects:

[0020] Compared with traditional earth-rock cofferdams, this method reduces earthwork demand and saves land and mineral resources. It fully utilizes the high turnover and recycling rate of steel materials to significantly reduce construction costs. It also reduces water pollution during cofferdam construction and removal, and reduces dust during earthwork operations, protecting the environment. Internal leakage and underwater slope instability in earth-rock cofferdams are difficult to observe, but the use of steel trestle construction allows for intuitive understanding of tidal changes and scouring conditions within the construction area. The exposed upper structure of the steel trestle makes it easy to observe and monitor its deformation and stability, thereby improving the safety of the construction process.

[0021] Compared with traditional steel platforms such as steel pipes, steel sections, and steel plates, the steel trestle of this utility model has various structures as standard units, which are convenient to construct and simple to operate. It is connected by a large number of bolts and pins, which greatly reduces the workload of welding, reduces the number of workers, and reduces costs. The various structures are connected by bolts, which greatly reduces the workload when dismantling the structure, reduces material waste caused by cutting, and improves the turnover utilization rate of materials. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 It is a cross-sectional view of a steel trestle used for spur dam pile foundation construction according to the present invention.

[0023] Figure 2 This is a detailed drawing of the standardized bridge deck of the steel trestle used for the construction of the spur dam pile foundation of the utility model.

[0024] Figure 3 The utility model is a cross section of a shaped bridge deck of a steel trestle for spur dam pile foundation construction.

[0025] Figure 4 The utility model is a structural schematic diagram of a steel trestle end plate for use in spur dam pile foundation construction.

[0026] Figure 5 The utility model is a structural schematic diagram of some components of a steel trestle for spur dam pile foundation construction.

[0027] In the figure: 1 steel pipe pile, 2 load-bearing beam, 3 scissors brace, 4 corbel plate, 5 structural connecting plate, 6 Bailey beam, 7 limiter, 8 diagonal brace, 9 distribution beam, 10 fixed bridge deck, 11 guardrail, 12 longitudinal rib, 13 patterned steel, 14 transverse rib, 15 fixed connecting plate, 16 positioning hole stiffener, 17 end plate, 18 U-bolt, 19 pressure plate, 20 S-bolt, 21 shoulder pole beam. DETAILED DESCRIPTION

[0028] In order to make the objectives, technical solutions and advantages of the present invention more clearly understood, the present invention is further described in detail below in conjunction with examples and drawings. The exemplary embodiments of the present invention and their descriptions are only used to explain the present invention and are not intended to limit the present invention.

[0029] Example:

[0030] This case study uses the Shangyu District Seawall Safety Project in Shaoxing City as an example. Located in the north of Shangyu District, the project is situated on the south bank of Jianshan Bay on the Qiantang River, on the right bank of the Cao'e River estuary, and north of Jiuliu Hill. It forms a first-line seawall along the Qiantang River, connecting the Yuecheng District section to the west and the Yuyao section to the east. The total length of the seawall constructed for the Shangyu District Seawall Safety Project is 13.58 km, consisting of 37 new spur dikes and two pantou dikes. All spur dikes utilize pile foundations. Based on the structural characteristics of the spur dikes, a steel trestle was designed for their pile foundation construction to reduce construction costs, protect the environment, and improve safety.

[0031] The steel trestle used in the spur dam pile foundation construction of the above project is as follows: Figure 1-Figure 5 As shown, it includes the substructure, superstructure and ancillary facilities.

[0032] The substructure comprises several steel pipe piles 1 erected along the length of the steel trestle. A load-bearing beam 2 is provided on top of the steel pipe piles 1. Corbels 4 are provided at the connection between the load-bearing beam 2 and the steel pipe piles 1 for stabilization. Braces 3 are provided between adjacent steel pipe piles 1 for stabilization. Structural connecting plates 5 are provided at the connection between the braces 3 and the steel pipe piles 1. The steel pipe piles 1 are constructed of 630*10mm spiral welded pipes. The load-bearing beam 2 is formed by double-jointed 45a welding. The braces 3 are machined from

[14] channel steel. The corbels 4 and structural connecting plates 5 are cut from 10mm thick Q235B steel plates.

[0033] Regarding the superstructure, it is mounted on the load-bearing beam 2 and includes several Bailey beams 6 mounted on the load-bearing beam 2. The Bailey beams 6 are connected to the load-bearing beam 2 by limiters 7 at the joints. Diagonal braces 8 are installed between adjacent Bailey beams 6. Distribution beams 9 are installed on top of several Bailey beams 6 and secured to the Bailey beams 6 by U-bolts 18 and pressure plates 19. In the superstructure, the Bailey beams 6 are formed by pinning together 321-type Bailey plates and 900-type brackets / 1500-type brackets. The limiters 7 are welded from [8-inch channel steel.] The diagonal braces 8 are machined from [8-inch channel steel.] The distribution beams 9 are I-25a I-beams, spaced 750mm apart.

[0034] Regarding the ancillary facilities, they are installed on the distribution beam 9 and include a shaped bridge deck 10 that forms the bridge surface and a guardrail 11 for protection. Among the ancillary facilities, the shaped bridge deck 10 is formed with longitudinal ribs 12 in the longitudinal direction, using 12 I-beams, and transverse ribs 14 arranged in a staggered manner in the transverse direction to form a skeleton. A 10mm thick patterned steel plate 13 is installed on top of the skeleton. The skeleton is also provided with a fixed connecting plate 15 for fixing it to the distribution beam 9. End plates 17 are provided at the ends of the skeleton. The 12 I-beams, 10mm thick patterned steel plates 13, transverse ribs 14, fixed connecting plates 15, and end plates 17 are formed into standard sizes by welding.

[0035] The guardrail 11 consists of columns and crossbars. The columns are welded from I-beams (I-12) and steel bases. The steel bases are rolled from 10mm steel sheets and secured with four fastening bolts. Four matching crossbar holes are reserved in the webs of the columns. The shaped bridge deck 10 is provided with locating holes and complemented by locating hole stiffeners 16. The shaped bridge deck 10 is secured to the distribution beam 9 using splayed bolts 20 and a shoulder beam 21 via the deck fixing connector 15.

[0036] The steel trestle was erected using the "fishing method," advancing construction one span at a time. Crawler cranes and vibratory hammers were used to sink steel pipe piles 1, controlling the depth of penetration and the elevation of the pile tops. After a row of steel pipe piles 1 was sunk, scissor braces 3 were welded. Duplex 45a load-bearing beams 2 were welded on land, hoisted into place by crawlers, and securely welded to the pile tops. Bailey beams 6 were assembled on land using 321-type Bailey plates and 900-type brackets. After a single beam was assembled, a crawler crane hoisted it precisely into position. Bailey beams 6 were secured with diagonal braces 8 between each other and secured at the support points of the load-bearing beams 2 with limiters 7. After a span of Bailey beams 6 was installed, the upper distribution beams 9 were hoisted. The distribution beams 9 were spaced 750 cm apart and secured to the Bailey plates using U-bolts 18 and pressure plates 19. After the distribution beam 9 is installed, the upper shaped bridge deck 10 is hoisted, and the bridge deck is positioned according to the predetermined position. It is fixed to the distribution beam 9 with S-bolts 20 and shoulder beams 21 through the bridge deck fixing connecting plates 15. While the construction is advancing span by span, the guardrails 11 on both sides are installed synchronously. The steel plate base of the guardrail 11 column is passed through the I-steel of the protruding part of the distribution beam 9. The front and rear positions are adjusted to ensure that the reserved holes of the front and rear column cross bars are in a line. The fixing bolts are tightened, the cross bars are passed through, and the installation of the guardrail 11 is completed. The elevation and plane position of each structure are controlled well during the entire steel trestle erection project. After the pile foundation construction is completed, the installation is carried out in the reverse order.

[0037] It is obvious to those skilled in the art that certain modifications, combinations and variations can be made based on the above teachings.

Claims

1. A steel trestle for spur dam pile foundation construction, characterized in that: The steel trestle includes a substructure, a superstructure and auxiliary facilities; The lower structure comprises a plurality of steel pipe piles (1) erected along the direction of the steel trestle, a load-bearing beam is provided on the top of the steel pipe piles, a bracket plate for stable fixation is provided at the connection between the load-bearing beam and the steel pipe piles, a scissors brace for stable connection is provided between adjacent steel pipe piles, and a connecting plate is provided at the connection between the scissors brace and the steel pipe piles; The upper structure is arranged on the load-bearing beam, and includes a plurality of Bailey beams (6) arranged on the load-bearing beam, and the Bailey beams (6) and the load-bearing beam are connected to each other by a limiter (7) arranged at the connection; a diagonal bracing structure is arranged between adjacent Bailey beams (6), and a distribution beam (9) is arranged on the top of the plurality of Bailey beams (6); The auxiliary facilities are arranged on the distribution beam (9), and include a shaped bridge deck (10) forming a bridge deck and a guardrail (11) for protection.

2. A steel trestle for spur dam pile foundation construction according to claim 1, characterized in that: In the lower structure, the steel pipe pile (1) is made of 630*10mm spiral welded pipe, the load-bearing beam (2) is formed by double-jointed 45a welding, the scissors support (3) is made of [14 channel steel, and the corbel plate (4) and the connecting plate (5) are cut and formed by 10mm thick Q235B steel plate.

3. The steel trestle for spur dike pile foundation construction according to claim 1, characterized in that: In the upper structure, the Bailey beam (6) is formed by assembling a 321 type Bailey plate and a 900 type bracket / 1500 type bracket through pins, the limiter (7) is formed by welding [8 channel steel, the diagonal brace (8) is formed by processing [8 channel steel, and the distribution beam (9) is formed by 25a I-beam with a spacing of 750mm.

4. The steel trestle for spur dike pile foundation construction according to claim 1, characterized in that: In the auxiliary facilities, the shaped bridge deck (10) is arranged as a skeleton with 12 I-beams (12) as the longitudinal direction and transverse ribs (14) as the transverse direction. A 10 mm thick patterned steel plate (13) is arranged on the top of the skeleton. A fixed connecting plate for fixing it to the distribution beam is also provided on the skeleton. An end plate (17) is provided at the end of the skeleton. The 12 I-beams (12), the 10 mm thick patterned steel plate (13), the transverse ribs (14), the fixed connecting plate (15), and the end plate (17) are formed by welding.

5. The steel trestle for spur dam pile foundation construction according to claim 1, characterized in that: Among the ancillary facilities, the guardrail consists of columns and cross bars. The columns are formed by welding I-12 I-steel and steel plate base. The steel plate base is formed by rolling 10mm steel plate and 4 fastening bolts are set on the base. 4 matching cross bar holes are reserved at the corresponding positions of the web of the I-12 I-steel of the column.

6. The steel trestle for spur dike pile foundation construction according to claim 1, characterized in that: The distribution beam and the Bailey beam are fixed by U-bolts (18) and pressure plates (19).

7. The steel trestle for spur dike pile foundation construction according to claim 1, characterized in that: The shaped bridge deck and the distribution beam are fixed by using eight-shaped bolts (20) and the shoulder beam (21) through the bridge deck fixing connecting plate (15).

8. The steel trestle for spur dike pile foundation construction according to claim 1, characterized in that: In the auxiliary facilities, the shaped bridge deck (10) is provided with positioning holes and is matched with a positioning hole stiffening plate (16).

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