Inverted L-shaped retaining structure
The inverted L-shaped retaining structure addresses the issue of high displacement and overturning in slope support by using anti-slip piles, retaining walls, and anchor rods to stabilize anti-slide piles, improving structural integrity and reducing the risk of damage.
Patent Information
- Application Number
- CN202420197143.5
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-01-26
- Publication Date
- 2024-12-10
- Estimated Expiration
- 2034-01-26
AI Technical Summary
Existing slope support structures, such as gravity retaining walls and cantilever anti-slide piles, face issues with high displacement and overturning due to increased earth pressure during extreme conditions, particularly heavy rainfall, leading to potential damage.
An inverted L-shaped retaining structure with anti-slip piles, a retaining wall, upper anchor rods, and toe plates, which offset earth pressure and resist moments to stabilize the anti-slide piles, using a cross beam and crown beam for enhanced structural integrity.
Reduces the risk of anti-slide pile overturning by balancing earth pressure and moments, enhancing structural reliability and stability under extreme conditions.
Smart Images
Figure CN222140109U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of slope support, in particular to an inverted L-shaped retaining structure. Background Art
[0002] The existing slope support structures are mainly supported by gravity retaining walls, cantilever anti-slide piles and anchor retaining walls; gravity retaining walls require the establishment of temporary excavation surfaces and have a large masonry volume, which is more suitable for situations with low support heights. When the support height is greater than 10m, cantilever anti-slide piles are usually used for slope support.
[0003] The problem with cantilever anti-sliding piles for slope support is that when the support height is high, the cantilever section of the anti-sliding pile is also high, and the displacement of the pile top is large. A gravity retaining wall is set on the top of the anti-sliding pile, and the gravity of the retaining wall can be used to balance the earth pressure against the clockwise moment generated by the anti-sliding pile. However, the problem with existing self-balancing retaining walls is that although the gravity retaining wall on the top of the upper pile plays a favorable role in the anti-sliding pile, the earth pressure of the gravity retaining wall is not reduced, and the resultant force of the earth pressure conversion of the gravity retaining wall will still act on the pile top. Under the influence of extreme factors such as heavy rainfall, the earth pressure behind the retaining wall increases, the anti-sliding piles tilt toward the empty side of the slope, and the anti-sliding piles are very likely to overturn and be damaged. Utility Model Content
[0004] In view of the deficiencies in the prior art, the utility model provides an inverted L-shaped retaining structure, which solves the problem that under the influence of extreme factors, the soil pressure behind the retaining wall of the existing self-balancing retaining wall becomes large, the anti-sliding piles tilt toward the air side of the slope, and the anti-sliding piles are very likely to overturn and be damaged.
[0005] According to an embodiment of the utility model, an inverted L-shaped retaining structure includes anti-slip piles, a retaining wall, an upper anchor rod and a toe plate; the retaining wall is arranged at the top of the slope, and the anti-slip piles are arranged at the bottom of the slope; a panel is fixed to the top of the anti-slip pile, and the panel and the anti-slip pile are in an inverted L shape; the retaining wall is arranged at an end of the panel away from the anti-slip pile, and the retaining wall presses the panel; the upper anchor rod anchors the retaining wall to the slope, and the toe plate is fixed to the bottom ground of the slope facing the air side, and the toe plate resists the anti-slip pile.
[0006] Compared with the prior art, the utility model has the following beneficial effects: the upper anchor rod offsets part of the earth pressure behind the retaining wall, reducing the resultant force transmitted to the top of the anti-sliding pile; the retaining wall presses the panel, and the counterclockwise moment generated by the deadweight of the retaining wall offsets part of the clockwise moment generated by the earth pressure at the bottom of the slope on the anti-sliding pile, thereby controlling the displacement of the top of the anti-sliding pile; the toe plate uses the foundation bearing capacity of the soil in front of the anti-sliding pile to resist the clockwise moment generated by the lateral load of part of the soil, thereby increasing the reliability of the structure and reducing the risk of the anti-sliding pile overturning to the air side; the problem that under the influence of extreme factors, the earth pressure behind the retaining wall of the existing self-balancing retaining wall increases, the anti-sliding pile tilts to the air side of the slope, and the anti-sliding pile is extremely prone to overturning and damage is solved.
[0007] Preferably, it also includes a cross beam and a crown beam; the cross beam is vertically fixed to the top of the anti-slip pile facing the slope, the end of the crown beam is fixed to the opposite side of the top of the adjacent anti-slip pile, and the edge of the panel is fixed to the cross beam and the crown beam.
[0008] The advantages of adopting the above technical solution are: the crown beam connects the anti-sliding piles together, and the overall connection is firm; the crown beam bears the horizontal squeezing force of the anti-sliding piles and strengthens the overall force characteristics of the anti-sliding piles, and the cross beam bears the gravity of the panel; the counterclockwise moment generated by the deadweight of the retaining wall is transmitted to the anti-sliding piles through the panel and the cross beam, offsetting the clockwise moment generated by the soil pressure at the bottom of the slope on the anti-sliding piles.
[0009] Preferably, it also includes a positioning anchor rod; a through hole is provided at the end of the crossbeam, and the positioning anchor rod is fixed in the through hole.
[0010] The above technical solution has the advantages of: the deformation of the anti-sliding pile top is resisted by the positioning anchor rod arranged at the end of the anti-sliding pile top cross beam, and the retaining wall and the positioning anchor rod can effectively control the displacement of the anti-sliding pile top.
[0011] Preferably, a retaining plate is provided on the top surface of the cap beam, and soil is filled in the retaining plate to cover the base of the retaining wall.
[0012] The advantages of adopting the above technical solution are: the backfill covers the base of the retaining wall and maintains the anti-slip stability of the retaining wall.
[0013] Preferably, it also includes a support plate; the end of the support plate is fixed to the opposite side of the top of the adjacent anti-slip pile, and the support plate is arranged under the crown beam; the support plate, panel and toe plate are cast with reinforced concrete, and the support plate steel frame is overlapped on the panel and toe plate steel frame.
[0014] The advantages of adopting the above technical solution are: the support plate can resist large lateral loads of the soil and has strong anti-deformation ability.
[0015] Preferably, the retaining wall is a gravity retaining wall.
[0016] The advantages of adopting the above technical solution are: the gravity retaining wall has a large deadweight, which well balances the overturning clockwise moment of the anti-slide pile. BRIEF DESCRIPTION OF THE DRAWINGS
[0017] Figure 1 This is a structural schematic diagram of an inverted L-shaped retaining structure according to an embodiment of the utility model;
[0018] Figure 2 It is a three-dimensional structural schematic diagram of an inverted L-shaped retaining structure according to an embodiment of the utility model. DETAILED DESCRIPTION
[0019] The technical solution of the present utility model is further described below in conjunction with the accompanying drawings and embodiments.
[0020] The figure marks in the drawings of the specification include: original ground 1, retaining wall 2, anti-sliding piles 3, beam 4, through hole 401, toe plate 5, fill 6, retaining plate 7, upper anchor rod 8, positioning anchor rod 9, panel 10, crown beam 11, support plate 12.
[0021] Example
[0022] like Figure 1-2 As shown, the embodiment of the utility model proposes an inverted L-shaped retaining structure, which includes anti-sliding piles 3, retaining walls 2, cross beams 4, crown beams 11, positioning anchor rods 9, upper anchor rods 8 and toe plates 5; the retaining wall 2 is a gravity retaining wall; the retaining wall 2 is arranged at the top of the slope, and the anti-sliding piles 3 are arranged at the bottom of the slope; the cross beam 4 is vertically fixed to the top of the anti-sliding pile 3 facing the slope, the end of the crown beam 11 is fixed to the side facing the top of the adjacent anti-sliding pile 3, the edge of the panel 10 is fixed to the cross beam 4 and the crown beam 11, and the panel 10 is fixed to the anti-sliding pile 3 It is in an inverted L shape; the toe plate 5 is fixed on the bottom ground of the side facing the air, and the toe plate 5 is against the anti-slip pile 3; the end of the support plate 12 is fixed on the opposite side of the top of the adjacent anti-slip pile 3, and the support plate 12 is arranged under the crown beam 11; the steel frame of the support plate 12 is overlapped on the steel frame of the panel 10 and the toe plate 5, and the crown beam 11, the cross beam 4, the panel 10, the toe plate 5 and the steel frame of the support plate 12 are cast together after the binding is completed; a through hole 401 is provided at the end of the cross beam 4, and the positioning anchor rod 9 is fixed in the through hole 401.
[0023] The calculation formula of the 9-axis force of the positioning anchor is: Na=
[0024] In the formula: γ is the bulk density of soil, unit: kN / m3; H is the total height of the support structure, unit: m; h is the height of the upper step of the retaining wall, unit: m; k is the soil side pressure coefficient; Bp is the calculated width of the pile body, unit: m; B is the pile spacing, unit: m; α is the anchor rod inclination angle, unit: degree.
[0025] The retaining wall 2 is arranged at one end of the panel 10 away from the anti-sliding pile 3. The retaining wall 2 presses the panel 10. The counterclockwise moment generated by the deadweight of the retaining wall 2 offsets the clockwise moment generated by the soil pressure at the bottom of the slope on the anti-sliding pile 3. The height of the upper step soil of the retaining wall 2 is taken into account in the selection calculation of the positioning anchor 9. The selected length of the positioning anchor is relatively small, which saves costs. A retaining plate 7 is arranged on the top surface of the crown beam 11. The retaining plate 7 is filled with soil 6. The fill 6 covers the root of the retaining wall 2. The upper anchor 8 holds the retaining wall 2 Anchored on the slope; the upper anchor rod 8 offsets part of the earth pressure behind the retaining wall 2, reducing the resultant force transmitted to the top of the anti-sliding pile 3; the toe plate 5 uses the foundation bearing capacity of the soil in front of the anti-sliding pile 3 to resist the clockwise moment generated by the lateral load of part of the soil, reducing the risk of the anti-sliding pile 3 overturning to the air side; the problem of the existing self-balancing retaining wall under the influence of extreme factors, the earth pressure behind the retaining wall 2 becomes large, the anti-sliding pile 3 tilts to the air side of the slope, and the anti-sliding pile 3 is very likely to overturn and be damaged.
[0026] The specific construction steps are:
[0027] 1. Excavate 1.5-3m from the original ground 1 to the top elevation of the anti-sliding pile 3. The excavation width is the width of the cross beam 4 at the top of the anti-sliding pile 3 and leave a construction working surface.
[0028] 2. Dig holes for the anti-sliding piles 3, tie the steel bars of the anti-sliding piles 3 in the holes, reserve the fixing steel bars for the top cross beam 4, the toe plate 5 and the supporting plate 12 of the anti-sliding piles 3, and cast the anti-sliding piles 3.
[0029] 3. After the anti-sliding pile 3 is cast to the pile top elevation, the steel skeletons of the cross beam 4, crown beam 11, panel 10, toe plate 5 and support plate 12 are tied, and effectively overlapped with the fixed steel bars reserved for the anti-sliding pile 3; the top and bottom edges of the steel skeleton of the support plate 12 are respectively tied to the steel bars of the panel 10 and toe plate 5; the cross beam 4, crown beam 11, panel 10, toe plate 5 and support plate 12 at the top of the pile are cast.
[0030] 4. After the strength of the pile top cross beam 4 reaches the requirement, a through hole 401 is drilled at the end of the cross beam 4, and the positioning anchor rod 9 is placed in the through hole 401, and the through hole 401 is grouted and sealed.
[0031] 5. Construct the retaining plate 7. After the retaining plate 7 reaches a certain strength, construct the gravity retaining wall 2, and then construct the upper anchor rod 8 on the retaining wall 2.
[0032] The above is only an embodiment of the utility model, and the common knowledge such as the known specific technical solutions and / or characteristics in the solution is not described in detail here. It should be pointed out that for those skilled in the art, without departing from the technical solution of the utility model, several deformations and improvements can be made, which should also be regarded as the protection scope of the utility model, and these will not affect the effect of the implementation of the utility model and the practicality of the patent. The scope of protection required by this application shall be based on the content of its claims, and the specific implementation methods and other records in the specification can be used to interpret the content of the claims.
Claims
1. An inverted L-shaped retaining structure, characterized in that: It includes anti-slip piles, retaining walls, upper anchor rods and toe plates; the retaining wall is arranged at the top of the slope, and the anti-slip piles are arranged at the bottom of the slope; a panel is fixed on the top of the anti-slip piles, and the panel and the anti-slip piles are in an inverted L shape; the retaining wall is arranged at the end of the panel away from the anti-slip piles, and the retaining wall presses the panel; the upper anchor rods anchor the retaining wall to the slope, and the toe plate is fixed to the bottom ground of the slope facing the air side, and the toe plate resists the anti-slip piles.
2. The inverted L-shaped retaining structure according to claim 1, characterized in that: It also includes a crossbeam and a crown beam; the crossbeam is vertically fixed on the top of the anti-sliding pile towards the slope, the end of the crown beam is fixed on the opposite side of the top of the adjacent anti-sliding pile, and the edge of the panel is fixed to the crossbeam and the crown beam.
3. The inverted L-shaped retaining structure according to claim 2, characterized in that: It also includes a positioning anchor rod; a through hole is arranged at the end of the crossbeam, and the positioning anchor rod is fixed in the through hole.
4. An inverted L-shaped retaining structure according to claim 2 or 3, characterized in that: A retaining plate is arranged on the top surface of the crown beam, and soil is filled in the retaining plate to cover the base of the retaining wall.
5. The inverted L-shaped retaining structure according to claim 4, characterized in that: It also includes a support plate; the end of the support plate is fixed on the opposite side of the top of the adjacent anti-sliding piles, and the support plate is arranged under the crown beam; the support plate, the panel and the toe plate are cast with reinforced concrete, and the support plate steel frame is overlapped on the panel and toe plate steel frame.
6. The inverted L-shaped retaining structure according to claim 1, characterized in that: The retaining wall is a gravity retaining wall.