Fall slope slide-resistant pile crown beam connecting structure and construction method
By designing a low-span cap beam extension and an inclined beam connecting the high-span anti-slide piles in the drop slope, the problem of the inability to connect the piles in the high-span and low-span areas was solved, thus improving the stability and strength of the overall structure.
Patent Information
- Application Number
- CN202411462827.4
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2024-10-19
- Publication Date
- 2025-01-07
AI Technical Summary
In slopes with elevation differences, the anti-slide piles in the high-span and low-span areas cannot be connected by a capping beam, affecting the overall stability of the structure.
Design a connection structure including a low-span cap beam and a high-span cap beam. The high-span anti-slide pile is connected by the extension of the low-span cap beam, and an inclined beam is set between the high-span cap beam and the low-span cap beam. The connection strength and stability are improved by using pre-embedded reinforcing bars and the inclined beam.
The system achieves overall connection between the piles in the high-span and low-span zones, improving the stability and strength of the structure. In particular, the design of pre-embedded reinforcing bars and inclined beams enhances the reliability of the connection.
Smart Images
Figure CN119266250A_ABST
Abstract
Description
Technical Field
[0001] The invention relates to a crown beam connection structure and a construction method. Background Art
[0002] Anti-slide piles are piles that penetrate the landslide body and penetrate into the sliding bed. They are used to support the sliding force of the sliding body and stabilize the slope. They are suitable for shallow and medium-thick landslides and are a major measure for anti-slide treatment. Due to the variability and discontinuity of the rock and soil around the piles, as well as the engineering characteristics of landslides dominated by plane strain, the sliding force of the slope that each pile needs to balance is different between different sections. This inevitably leads to different degrees of deformation differences between the piles in engineering practice. Therefore, it is necessary to connect the tops of multiple anti-slide piles with crown beams to make multiple anti-slide piles form an integral structure.
[0003] In actual construction, steep terrain changes are often encountered, resulting in a significant drop between adjacent anti-slip piles, dividing the section into a high-span area and a low-span area. The problem with the existing technology is that the anti-slip piles in the high-span area and the anti-slip piles in the low-span area cannot be connected as one through the crown beam, affecting the stability of the overall structure. Summary of the invention
[0004] Aiming at the problem that the anti-slide piles in the high-span area and the low-span area cannot be connected as a whole through a crown beam due to a drop slope, the present invention provides an anti-slide pile crown beam connection structure and a construction method.
[0005] The technical solution of the present invention:
[0006] A drop slope anti-sliding pile crown beam connection structure comprises a low-span crown beam 1 and a high-span crown beam 2 with a drop. The low-span crown beam 1 has an extension section 10, and the extension section 10 is connected to the anti-sliding pile below the high-span crown beam 2.
[0007] The ends of the high-span crown beam 2 are connected to the low-span crown beam 1 through the inclined beam 3 .
[0008] The main reinforcement of the extension section 10 is embedded in the anti-sliding piles, and the main reinforcement of the inclined beam 3 connects the main reinforcement of the high-span crown beam 2 and the low-span crown beam 1.
[0009] The extension section 10 connects two anti-sliding piles below the high-span crown beam 2 .
[0010] A construction method for a drop slope anti-slide pile cap beam comprises the following steps:
[0011] A. Construction of low-span anti-slide piles;
[0012] B. Construct low-span crown beams and connect the tops of multiple low-span anti-slide piles with crown beams;
[0013] C. Rotary drilling of pile holes for high-span anti-slide piles;
[0014] D. Drill transverse holes from the main reinforcement position of the low-span crown beam to the direction of the high-span anti-slide piles;
[0015] E. Lower the steel cage into the high-span pile hole;
[0016] F. Insert transverse dowel bars into the transverse holes and connect the dowel bars to the main bars exposed at the end of the low span crown beam;
[0017] G. Cast high-span anti-slide piles and high-span cap beams;
[0018] H. Excavate the high-span area and dig out the horizontal reinforcement;
[0019] I. Set up the formwork for the low-span crown beam extension section and cast the low-span crown beam extension section.
[0020] Cast inclined beams connect the high-span crown beam and the low-span crown beam.
[0021] When constructing the low-span crown beam in step B, reserve upward inclined reinforcement on the main reinforcement. After the low-span crown beam and the high-span crown beam are cast, use steel bars to connect the low-span crown beam inclined reinforcement and the high-span crown beam main reinforcement, build a formwork and cast an inclined beam to connect the high-span crown beam and the low-span crown beam.
[0022] In step D, the transverse hole needs to penetrate the two high-span anti-sliding pile holes.
[0023] The lower end of the inclined beam is located above the second low-span anti-slide pile.
[0024] The excavation sequence of the soil around the anti-slide piles is as follows: after the high-span crown beam, low-span crown beam and inclined beam are cast, the soil in the high-span area is excavated to the height of the low-span crown beam and the pile wall slab construction is carried out. After the extension section of the low-span crown beam is cast, the soil in the lower half of the low-span area and the high-span area is excavated and the pile wall slab construction is carried out.
[0025] Beneficial effects of the present invention:
[0026] 1. The high-span anti-slip piles are connected through the extension section of the low-span crown beam, so that the piles in the high-span area and the low-span area are connected as a whole to improve stability.
[0027] 2. A construction method of transverse drilling and pre-embedded dowel bars is specially designed so that the main reinforcement of the extension section of the secondary construction can be pre-embedded into the anti-slip piles to improve the structural strength and stability. If the main reinforcement of the extension section cannot be pre-embedded, the strength of the entire connection structure will be greatly reduced.
[0028] 3. An inclined beam is designed to connect the high-span crown beam and the low-span crown beam to further improve the structural stability. BRIEF DESCRIPTION OF THE DRAWINGS
[0029] Figure 1 Anti-sliding pile crown-beam connection structure for drop slope.
[0030] Figure 2 Schematic diagram of the three-dimensional connection structure of the anti-sliding pile crown beam on the drop slope.
[0031] Figure 3 It is a schematic diagram showing the rotary excavation of low-span pile holes on the original high-low span landform.
[0032] Figure 4 This is a schematic diagram of the lowering of the steel cage and pouring of concrete for low-span anti-slide piles.
[0033] Figure 5 This is a construction diagram of a low-span crown beam.
[0034] Figure 6 It is a schematic diagram of rotary drilling of high-span pile holes in high-span areas.
[0035] Figure 7 It is a schematic diagram of horizontal drilling.
[0036] Figure 8 It is a schematic diagram of the three-dimensional structure of horizontal drilling.
[0037] Fig. 9 It is a schematic diagram of transverse inserted reinforcement.
[0038] Fig.10 It is a schematic diagram of high-span crown beam forming.
[0039] Fig.11 This is a schematic diagram of inclined beam construction.
[0040] Fig.12 Schematic diagram of excavation in the high span area until the transverse dowel bars are dug out.
[0041] Fig.13 It is a schematic diagram of the forming of the extended section of the low-span crown beam.
[0042] Fig.14 It is a schematic diagram of low-span area excavation and subsequent construction. DETAILED DESCRIPTION
[0043] Embodiment 1: The anti-sliding pile crown beam connection structure of the drop slope includes a low-span crown beam 1 and a high-span crown beam 2 with a drop. The low-span crown beam 1 has an extension section 10, and the extension section 10 is used to connect the anti-sliding pile below the high-span crown beam 2. In order to improve the strength of the connection, the main reinforcement of the extension section 10 needs to be pre-buried in the anti-sliding pile. The specific construction method is as follows:
[0044] A. Construct low-span anti-slide piles, including rotary drilling of pile holes, steel cage below and pouring of concrete. A certain length of longitudinal reinforcement needs to be reserved on the top of the steel cage.
[0045] B. Construct low-span crown beams and connect the tops of multiple low-span anti-slip piles with crown beams. First, set up the formwork and connect the main reinforcement of the low-span crown beams with the steel bars reserved at the tops of the low-span anti-slip piles. Then, pour concrete to form the crown beam structure. A portion of the exposed main reinforcement needs to be reserved at the end of the crown beam close to the high-span area.
[0046] C. Rotary drilling of pile holes for high-span anti-slide piles.
[0047] D. Drill holes transversely from the main reinforcement of the low-span crown beam toward the high-span anti-sliding piles using a drilling machine or other equipment; in this embodiment, the transverse holes need to pass through two pile holes, and one or more pile holes can also be selected according to actual conditions.
[0048] E. Lower the steel cage into the high-span pile hole.
[0049] F. Insert transverse dowel bars into the transverse holes and connect them to the main bars exposed at the end of the low-span crown beam. If the dowel bars cannot be inserted into the opposite through holes due to bending, the dowel bars can be guided manually from the top of the pile hole of the high-span anti-slip pile using tools such as hooks and locks.
[0050] G. Cast high-span anti-slide piles and high-span cap beams.
[0051] H. Excavate the high-span area and dig out the transverse dowel bars.
[0052] I. Set up the formwork for the low-span crown beam extension section and cast the low-span crown beam extension section.
[0053] Embodiment 2:
[0054] A drop slope anti-sliding pile crown beam connection structure includes a low-span crown beam 1 and a high-span crown beam 2 with a drop, the low-span crown beam 1 has an extension section 10, and the extension section 10 is connected to the anti-sliding pile below the high-span crown beam 2. The end of the high-span crown beam 2 is connected to the low-span crown beam 1 through an inclined beam 3. In order to improve the strength, the main reinforcement of the extension section 10 needs to be buried in the anti-sliding pile, and the two ends of the main reinforcement of the inclined beam 3 need to be connected to the main reinforcement of the high-span crown beam 2 and the low-span crown beam 1. Furthermore, the extension section 10 needs to be connected to the two anti-sliding piles below the high-span crown beam 2 to improve stability.
[0055] The specific construction method includes the following steps:
[0056] A. Construction of low-span anti-slide piles; including rotary excavation of pile holes, steel cage below and pouring of concrete. A certain length of steel bars needs to be reserved on the top of the steel cage. For the specific construction process, see Figure 2-Figure 3 .
[0057] B. Construct low-span cap beams and connect the tops of multiple low-span anti-slide piles with cap beams; Figure 4First, set up the formwork and connect the main reinforcement of the low-span crown beam and the reserved reinforcement on the top of the low-span anti-slip pile, and then pour concrete to form the crown beam structure. A part of the exposed main reinforcement needs to be reserved at the end of the crown beam. At the same time, the reserved diagonal reinforcement of the diagonal beam should be tied to the main reinforcement. The binding position is above the second low-span anti-slip pile from right to left. The binding position can also be adjusted as needed.
[0058] C. Rotary excavation of the pile hole for high-span anti-sliding piles. The effect after excavation is shown in Figure 5 .
[0059] D. Drill transverse holes from the main reinforcement of the low-span crown beam to the high-span anti-sliding pile using a drilling machine or other equipment; the transverse holes need to penetrate at least two piles. For specific drilling locations, see Figure 6 and Figure 7 .
[0060] E. Lower the steel cage into the high-span pile hole.
[0061] F. Insert transverse dowels into the transverse holes and connect the dowels to the main bars exposed at the end of the low-span crown beam. If the dowels cannot be inserted into the opposite through-holes due to bending, tools can be used to guide the dowels from the top of the pile hole of the high-span anti-slip pile. The effect is shown in Figure 8 .
[0062] G. Cast high-span anti-sliding piles and high-span crown beams. The structure after forming is as follows Fig. 9 , it is necessary to expose a part of the main reinforcement at the end, then build the formwork support system of the inclined beam, install the formwork, overlap the low span reserved inclined reinforcement and the high span reserved main reinforcement at both ends of the main reinforcement of the inclined beam, and cast the inclined beam into shape. Fig.10 .
[0063] H. Excavate the high span area and dig out the horizontal reinforcement. Fig.11 .
[0064] I. Set up the template of the low-span crown beam extension section and cast the low-span crown beam extension section. The structure after forming is as follows Fig.12 .
[0065] J. Complete subsequent earth excavation and pile-board wall construction.
Claims
1. A drop slope anti-sliding pile crown beam connection structure, comprising a low-span crown beam (1) and a high-span crown beam (2) with a drop, characterized in that: The low-span crown beam (1) has an extension section (10), and the extension section (10) is connected to the anti-sliding pile below the high-span crown beam (2).
2. The drop slope anti-slide pile crown beam connection structure according to claim 1, characterized in that: The end of the high-span crown beam (2) is connected to the low-span crown beam (1) via an inclined beam (3).
3. The drop slope anti-slide pile crown beam connection structure according to claim 2, characterized in that: The main reinforcement of the extension section (10) is embedded in the anti-sliding piles, and the main reinforcement of the inclined beam (3) is connected to the main reinforcement of the high-span crown beam (2) and the low-span crown beam (1).
4. The drop slope anti-slide pile crown beam connection structure according to claim 3, characterized in that: The extension section (10) connects two anti-sliding piles below the high-span crown beam (2).
5. A construction method for anti-sliding pile crown beams on drop slopes, characterized in that The following steps are involved: A. Construction of low-span anti-slide piles; B. Construct low-span crown beams and connect the tops of multiple low-span anti-slide piles with crown beams; C. Rotary drilling of pile holes for high-span anti-slide piles; D. Drill transverse holes from the main reinforcement position of the low-span crown beam to the direction of the high-span anti-slide piles; E. Lower the steel cage into the high-span pile hole; F. Insert transverse dowel bars into the transverse holes and connect the dowel bars to the main bars exposed at the end of the low-span crown beam. The transverse dowel bars are the main bars of the extended crown beam. G. Cast high-span anti-slide piles and high-span cap beams; H. Excavate the high-span area and construct the pile-sheet wall in the high-span area, and dig out the transverse dowel bars in the extension section; I. Set up the formwork for the low-span crown beam extension section, tie the steel bars, and cast the low-span crown beam extension section.
6. The construction method of the anti-sliding pile cap beam of the drop slope according to claim 5 is characterized by: Cast inclined beams connect the high-span crown beam and the low-span crown beam.
7. The construction method of the anti-sliding pile cap beam of the drop slope according to claim 6 is characterized by: When constructing the low-span crown beam in step B, reserve upward inclined reinforcement on the main reinforcement. After the low-span crown beam and the high-span crown beam are cast, use steel bars to connect the low-span crown beam inclined reinforcement and the high-span crown beam main reinforcement, build a formwork and cast an inclined beam to connect the high-span crown beam and the low-span crown beam.
8. The construction method of the anti-sliding pile cap beam of the drop slope according to any one of claims 6-7, characterized in that: In step D, the transverse hole needs to penetrate at least two high-span anti-sliding pile holes.
9. The construction method of the anti-sliding pile cap beam of the drop slope according to claim 8, characterized in that: The lower end of the inclined beam is located above the second low-span anti-slide pile.
10. The construction method of the anti-sliding pile cap beam of the drop slope according to claim 8, characterized in that The excavation sequence of the soil around the anti-slide piles is as follows: after the high-span crown beam, low-span crown beam and inclined beam are cast, the soil in the high-span area is excavated to the height of the low-span crown beam and the pile wall slab construction is carried out. After the extension section of the low-span crown beam is cast, the soil in the lower half of the low-span area and the high-span area is excavated and the pile wall slab construction is carried out.