Combined pile structure for implanting small-diameter steel pipe into shallow-coverage large boulder lead hole
By using Bailey beam cantilever end steel pipe pile guide frames and small-diameter I-beam steel pipe pile anchoring structures in the construction of steel trestle bridges, the construction difficulties of steel pipe piles under shallow overburden boulder geological conditions were solved, and the verticality of the steel pipe piles was guaranteed and the construction efficiency was improved.
Patent Information
- Application Number
- CN202520627528.5
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-04-03
- Publication Date
- 2026-01-23
- Estimated Expiration
- 2035-04-03
AI Technical Summary
In the construction of steel pipe piles for steel trestle bridges, it is difficult to lay out the pile positions, and the processing of the pile heads and the welding of the steel sections require the construction platform. In addition, when there are large boulders or rock layers in the shallow overburden geology, traditional construction methods such as hammering and vibration sinking are difficult to implement.
A shallow-cover, large-diameter boulders were used to implant small-diameter steel pipe composite piles. The structure included a Bailey beam cantilever end steel pipe pile guide frame, drilling rig pilot holes, and a small-diameter I-beam steel pipe pile anchoring structure. A single row of steel pipe piles was driven in using a crawler crane and vibratory hammer, and anchoring concrete was poured in the drilling rig pilot holes to form a stable structure.
This effectively ensured the verticality and installation efficiency of the steel pipe piles, improved the stability of the steel trestle bridge, and reduced the construction difficulty.
Smart Images
Figure CN223824151U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of pile foundation engineering technology, and in particular to a composite pile structure for shallowly covered large boulders with small-diameter steel pipes inserted through a pre-hole. Background Technology
[0002] Common problems encountered in the construction of steel pipe piles for steel trestle bridges include difficulties in pile location layout, the need to set up construction platforms for steel pipe pile head processing and steel section welding, and the difficulty in ensuring the coordinates and verticality of the pile body. In shallow overburden geological conditions with large boulders or rock layers, traditional steel pipe pile driving techniques, such as hammer driving and vibratory hammer driving, are difficult to implement. Existing steel pipe pile construction methods cannot be directly implemented using vibratory hammer driving under specific geological conditions, such as when setting up trestle bridge steel pipe piles in shallow overburden riverbeds, necessitating the development of new anchoring methods. Using a combination of small-diameter steel pipe piles inserted through pilot holes into large boulders in shallow overburden is a relatively effective measure to solve this problem. Utility Model Content
[0003] The purpose of this invention is to overcome the shortcomings of the existing technology and provide a shallow-covered large boulder pilot hole implantation small-diameter steel pipe composite pile structure.
[0004] This shallow-covered large boulder pre-hole implantation small-diameter steel pipe composite pile structure includes: a steel trestle bridge; the bottom of the steel trestle bridge is equipped with Bailey beams, the ends of which are supported by double rows of steel pipe piles, and the middle is supported by a single row of steel pipe piles;
[0005] A Bailey beam cantilever end is set above a shallowly covered large boulder, and a steel pipe pile guide frame is set on the cantilever end of the Bailey beam for driving a single row of steel pipe piles at the shallowly covered large boulder.
[0006] Several drilling rig pilot holes are set up in the single row of steel pipe piles at the shallowly covered large boulders, and small-diameter I-beam steel pipe piles are installed in the drilling rig pilot holes.
[0007] Preferably, the double rows of steel pipe piles are connected by inter-column supports, and the tops of the double rows of steel pipe piles are connected by connecting beams. Limiting channel steel is connected to the connecting beams, and a transverse load-bearing beam is installed inside the upper limit channel steel of the double rows of steel pipe piles. Limiting channel steel is set on the single row of steel pipe piles, and a transverse load-bearing beam is installed inside the upper limit channel steel of the single row of steel pipe piles. Bailey beams are installed on the transverse load-bearing beams, and a first distribution beam is installed at the bottom of the Bailey beams. The Bailey beam units are connected by reinforcing vertical bars, and a second distribution beam is installed on the Bailey beams. Precast bridge panels are hoisted onto the second distribution beams, and guardrails and kick plates are installed on both sides of the precast bridge panels.
[0008] As a preferred embodiment, the hoisting steel pipe pile guide frame includes a steel pipe pile guide frame construction platform and a steel pipe pile guide frame guide steel pipe. A single row of steel pipe piles is driven into the steel pipe pile guide frame guide steel pipe by a crawler crane and a vibratory hammer. The single rows of steel pipe piles are connected by scissor bracing and parallel bracing.
[0009] As a preferred option, the steel pipe pile guide frame construction platform is equipped with safety guardrails around it, and guide steel pipes are installed at the steel pipe pile holes on the platform.
[0010] As a preferred option, several drilling rig pilot holes are symmetrically arranged within a single row of steel pipe piles at shallowly covered large boulders.
[0011] As a preferred option, a grouting pipe is inserted into the small-diameter I-beam steel pipe pile to pour anchoring concrete into the drilling rig pilot hole. The anchoring concrete is poured to a certain height inside the single-row steel pipe pile. The single-row steel pipe pile, the shallowly covered large boulder, the small-diameter I-beam steel pipe pile, and the anchoring concrete form a stable structure.
[0012] The beneficial effects of this utility model are:
[0013] 1) This utility model proposes a steel pipe pile guide frame. The construction platform of the steel pipe pile guide frame is equipped with a safety guardrail around the steel pipe pile guide frame. The guide steel pipe of the steel pipe pile guide frame is installed at the hole position of the steel pipe pile on the construction platform, which effectively ensures the verticality of the steel pipe pile installation and improves the installation efficiency.
[0014] 2) This utility model adopts a steel pipe pile anchoring structure with small diameter I-beam steel pipe piles inside the shallow-covered large boulders, forming a stable structure composed of a single row of steel pipe piles, shallow-covered large boulders, small diameter I-beam steel pipe piles, and anchoring concrete, which effectively ensures the stability of the steel trestle bridge and reduces the difficulty of driving steel pipe piles. Attached Figure Description
[0015] Figure 1 This is a schematic diagram of a steel pipe pile vibration sinking structure on a shallowly covered large isolated rock;
[0016] Figure 2 This is a schematic diagram of the steel pipe pile guide frame structure;
[0017] Figure 3 This is a schematic diagram of the drilling rig pilot hole structure for steel pipe piles on shallowly covered large boulders;
[0018] Figure 4 yes Figure 3 Schematic diagram of the AA section structure;
[0019] Figure 5 This is a schematic diagram of the anchorage structure of a small-diameter I-beam steel pipe pile inside a steel pipe pile on a shallowly covered large isolated rock.
[0020] Figure 6 yes Figure 5 Schematic diagram of the BB section structure;
[0021] Figure 7 yes Figure 5 Schematic diagram of the CC section structure.
[0022] In the diagram: 1-Double-row steel pipe piles, 2-Inter-column support, 3-Connecting crossbeam, 4-Limiting channel steel, 5-Transverse load-bearing beam, 6-Single-row steel pipe piles, 7-Bailey beam, 8-First distribution beam, 9-Reinforcing vertical bar, 10-Second distribution beam, 11-Precast bridge deck, 12-Kickboard, 13-Guardrail, 14-Cantilever end of Bailey beam, 15-Steel pipe pile guide frame, 16-Vibratory hammer, 17-Shallow-covered large boulder, 18-Safety railing of steel pipe pile guide frame, 19-Construction platform of steel pipe pile guide frame, 20-Guide steel pipe of steel pipe pile guide frame, 21-Drilling rig pilot hole, 22-Small-diameter I-beam steel pipe pile, 23-Grouting pipe, 24-Anchoring concrete. Detailed Implementation
[0023] The present invention will be further described below with reference to embodiments. The description of the embodiments below is only for the purpose of helping to understand the present invention. It should be noted that, for those skilled in the art, several modifications can be made to the present invention without departing from the principle of the present invention, and these improvements and modifications also fall within the protection scope of the claims of the present invention.
[0024] As one embodiment, this shallow-covered large boulder pilot hole implantation small-diameter steel pipe composite pile structure involves a steel trestle structure, a steel pipe pile vibration sinking structure on shallow-covered large boulder 17, a drilling pilot hole 21 structure inside the steel pipe pile on shallow-covered large boulder 17, and a small-diameter I-beam steel pipe pile 22 anchoring structure inside the steel pipe pile on shallow-covered large boulder 17.
[0025] The bottom of the steel trestle bridge is equipped with Bailey beams 7, which are supported at the ends by double rows of steel pipe piles 1 and in the middle by single rows of steel pipe piles 6.
[0026] A Bailey beam 7 is provided with a cantilever end 14 above a shallowly covered large boulder 17, and a steel pipe pile guide frame 15 is provided on the cantilever end 14 of the Bailey beam for driving a single row of steel pipe piles 6 at the shallowly covered large boulder 17.
[0027] Several drilling rig pilot holes 21 are provided in the single row of steel pipe piles 6 at the shallowly covered large boulders 17, and small-diameter I-beam steel pipe piles 22 are installed in the drilling rig pilot holes 21.
[0028] The steel trestle structure includes: double rows of steel pipe piles 1 at both ends and a single row of steel pipe piles 6 in the middle. The double rows of steel pipe piles 1 are connected by inter-column supports 2. The tops of the double rows of steel pipe piles 1 are connected by connecting beams 3. Limiting channel steel 4 is connected to the connecting beams 3. A transverse load-bearing beam 5 is installed inside the limiting channel steel 4 of the double rows of steel pipe piles 1. Limiting channel steel 4 is connected to the single row of steel pipe piles 6. A transverse load-bearing beam 5 is installed inside the limiting channel steel 4 of the single row of steel pipe piles 6. Bailey beams 7 are installed on the transverse load-bearing beams 5. A first distribution beam 8 is installed at the bottom of the Bailey beams 7. The units of the Bailey beams 7 are connected by reinforcing vertical bars 9. A second distribution beam 10 is installed on the Bailey beams 7. A precast bridge panel 11 is hoisted onto the second distribution beam 10. Guardrails 13 and kick plates 12 are installed on both sides of the precast bridge panel 11.
[0029] like Figure 1 As shown, the vibratory sinking structure of steel pipe piles on shallowly covered large boulders 17 is designed for the construction of a single row of steel pipe piles 6 in the middle of the steel trestle bridge. When encountering shallowly covered large boulders 17 during the construction of the single row of steel pipe piles 6, a steel pipe pile guide frame 15 is hoisted on the cantilever end 14 of the Bailey beam. Then, the single row of steel pipe piles 6 is hoisted into the guide steel pipe 20 of the steel pipe pile guide frame. The single row of steel pipe piles 6 is driven into the ground until it cannot be penetrated further by crawler crane and vibratory hammer 16. Then, the scissor bracing and parallel connection between the single row of steel pipe piles 6 are carried out.
[0030] like Figure 2 As shown, the steel pipe pile guide frame 15 and the steel pipe pile guide frame construction platform 19 are equipped with steel pipe pile guide frame safety guardrails 18, and steel pipe pile guide frame guide steel pipes 20 are installed at the steel pipe pile hole positions on the steel pipe pile guide frame construction platform 19.
[0031] The aforementioned structure of drilling rig pilot holes 21 inside the steel pipe piles on the shallowly covered large boulder 17 involves drilling pilot holes 21 inside the steel pipe piles 6 to a certain depth outside the single row of steel pipe piles 6 after the single row of steel pipe piles 6 is vibrated and sunk and connected by shear bracing and parallel connection. 4 drilling pilot holes 21 are symmetrically arranged in each single row of steel pipe piles 6.
[0032] like Figure 4 and Figure 6 , Figure 7 As shown, the anchoring structure of the small-diameter I-beam steel pipe pile 22 inside the steel pipe pile on the shallowly covered large boulder 17 involves installing the small-diameter I-beam steel pipe pile 22 inside the drilling rig pilot hole 21 of the single-row steel pipe pile 6. After the small-diameter I-beam steel pipe pile 22 is installed, a grouting pipe 23 is inserted, and anchoring concrete 24 is poured into the drilling rig pilot hole 21 through the grouting pipe 23. The anchoring concrete 24 is poured to a certain height inside the single-row steel pipe pile 6, forming a stable structure composed of the single-row steel pipe pile 6, the shallowly covered large boulder 17, the small-diameter I-beam steel pipe pile 22, and the anchoring concrete 24.
Claims
1. A composite pile structure for shallow-covered large boulders with pre-drilled holes for implanting small-diameter steel pipes, characterized in that, include: Steel trestle bridge; the bottom of the steel trestle bridge is equipped with Bailey beams, the ends of which are supported by double rows of steel pipe piles, and the middle is supported by a single row of steel pipe piles. A Bailey beam cantilever end is set above a shallowly covered large boulder, and a steel pipe pile guide frame is set on the cantilever end of the Bailey beam for driving a single row of steel pipe piles at the shallowly covered large boulder. Several drilling rig pilot holes are set up in the single row of steel pipe piles at the shallowly covered large boulders, and small-diameter I-beam steel pipe piles are installed in the drilling rig pilot holes.
2. The shallow-covered large boulder pilot hole implantation small-diameter steel pipe composite pile structure according to claim 1, characterized in that, The double-row steel pipe piles are connected by inter-column supports. The tops of the double-row steel pipe piles are connected by connecting beams. Limiting channel steel is connected to the connecting beams. A transverse load-bearing beam is installed inside the upper limit channel steel of the double-row steel pipe piles. A limiting channel steel is set on the single-row steel pipe piles. A transverse load-bearing beam is installed inside the upper limit channel steel of the single-row steel pipe piles. Bailey beams are installed on the transverse load-bearing beams. A first distribution beam is installed at the bottom of the Bailey beams. The Bailey beam units are connected by reinforcing vertical bars. A second distribution beam is installed on the Bailey beams. Precast bridge panels are hoisted onto the second distribution beams. Guardrails and kick plates are installed on both sides of the precast bridge panels.
3. The shallow-covered large boulder pilot hole implantation small-diameter steel pipe composite pile structure according to claim 1, characterized in that, The steel pipe pile hoisting guide frame includes a steel pipe pile guide frame construction platform and a steel pipe guide frame guide steel pipe. A single row of steel pipe piles is driven into the steel pipe guide frame guide steel pipe by a crawler crane and a vibratory hammer. The single rows of steel pipe piles are connected by scissor bracing and parallel bracing.
4. The shallow-covered large boulder pilot hole implantation small-diameter steel pipe composite pile structure according to claim 3, characterized in that, The steel pipe pile guide frame construction platform is equipped with safety railings around it, and guide steel pipes are installed at the steel pipe pile hole positions on the platform.
5. The shallow-covered large boulder pilot hole implantation small-diameter steel pipe composite pile structure according to claim 1, characterized in that, Several drill holes are symmetrically arranged inside a single row of steel pipe piles at the shallowly covered large boulders.
6. The shallow-covered large boulder pilot hole implantation small-diameter steel pipe composite pile structure according to claim 1, characterized in that, Small-diameter I-beam steel pipe piles have grouting pipes inserted inside for pouring anchoring concrete into the drilling rig pilot hole. The anchoring concrete is poured to a certain height inside the single row of steel pipe piles. The single row of steel pipe piles, shallowly covered large boulders, small-diameter I-beam steel pipe piles, and anchoring concrete form a stable structure.