Non-excavation type slope supporting structure for protecting existing building
By using non-excavated reinforced concrete retaining wall and steel pipe ground anchor reinforcement technology on the building slope, the problem of traditional slope support for building damage and excavation requirements is solved, and the situation without changing the original building is achieved It provides stable slope support to enhance anti-population and lateral shift capabilities.
Patent Information
- Application Number
- CN202421000022.3
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-05-09
- Publication Date
- 2024-12-27
- Estimated Expiration
- 2034-05-09
AI Technical Summary
Traditional gravity retaining wall slope support structures are prone to damage existing buildings during construction of tight sites, and require excavation, which cannot adapt to the current tight construction conditions and technological development trends.
The non-excavated reinforced concrete retaining wall structure is adopted, and the grouting body is reinforced by burying the ground anchor of the steel flower pipe and the foundation. Combining the vertical step-shaped reinforced concrete retaining wall and plain concrete backfilling, a stable slope support system is formed to enhance resistance. Caps and resistance to lateral shift.
Without excavating the original slope, effective slope support is provided, deformation is controlled, existing buildings are protected, and the original buildings are not required to be renovated, and it has good anti-capsulse and lateral movement capabilities.
Smart Images
Figure CN222252164U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of building slope support engineering, in particular to a trenchless slope support structure for protecting existing buildings. Background Art
[0002] Since the beginning of the 21st century, my country's urbanization process has accelerated, the building density has increased, the construction site conditions in high-intensity development areas have become increasingly tight, and construction activities near existing buildings have become more frequent. Therefore, the protection of foundations, slopes and other structures near existing buildings has become an important proposition facing current construction activities.
[0003] Traditional gravity retaining wall slope support structures require a certain amount of excavation and backfill to enhance anti-overturning and anti-lateral displacement capabilities in order to better exert slope support capabilities. However, due to the stringent construction requirements and the risk of causing certain damage to the existing building slopes, it is no longer suitable for the current tight site construction conditions and technology development trends. Utility Model Content
[0004] The utility model aims to provide a trenchless slope support structure for protecting existing buildings to solve the technical problems in the background technology.
[0005] The utility model provides a trenchless slope supporting structure for protecting existing buildings, comprising a reinforced concrete retaining wall in the shape of a vertical step, the bottom wall toe of the reinforced concrete retaining wall is buried in the foundation, a steel flower pipe ground anchor is arranged at the bottom of the reinforced concrete retaining wall, the top of which is embedded and cast in the reinforced concrete retaining wall and buried in the foundation, a foundation reinforcement grouting body is cast on the outside of the steel flower pipe ground anchor, and plain concrete is backfilled between the reinforced concrete retaining wall and the original slope.
[0006] Furthermore, the reinforced concrete retaining wall is narrow at the top and wide at the bottom, and the top of the reinforced concrete retaining wall is higher than the original slope ground line.
[0007] Furthermore, the top of the reinforced concrete retaining wall is 0.5m higher than the original slope ground line, and the bottom wall toe of the reinforced concrete retaining wall is buried at a position greater than 0.2m below the new slope foot ground line.
[0008] Furthermore, the reinforced concrete retaining wall has a height of 2.5m-4m, a width of 0.5m-1m, and a wall toe width of 0.4m-0.8m.
[0009] Furthermore, the steel pipe anchors are arranged in a plum blossom shape.
[0010] Furthermore, the steel flower pipe anchors are arranged in two rows from front to back with a longitudinal spacing of 1 m.
[0011] Furthermore, the steel flower pipe ground anchor is made of a hot-rolled seamless steel pipe with a diameter of 42mm, a length of 3m, and a wall thickness of 3.5mm. The bottom is conical, and four rows of grouting holes with a diameter of 6mm are opened around the pipe wall.
[0012] Furthermore, a steel stirrup frame is welded to the top anchor head of the steel tube ground anchor, the top anchor head of the steel tube ground anchor is embedded in the reinforced concrete retaining wall, and the steel stirrup frame is welded to the retaining wall steel bars in the reinforced concrete retaining wall.
[0013] Furthermore, the diameter of the foundation reinforcement grouting body is 0.4m, and the grouting material of the foundation reinforcement grouting body is cement-water glass double liquid slurry casting.
[0014] Furthermore, expansion joints and drainage holes are arranged on the reinforced concrete retaining wall, and asphalt hemp tendons are filled in the expansion joints; the drainage holes are arranged to be inclined outward, and the drainage hole at the bottom is 0.2m higher than the ground line of the new slope foot.
[0015] The utility model forms a stable slope support system by installing steel pipe anchors and timely implementing foundation reinforcement grouting. When pouring reinforced concrete retaining walls, the steel pipe anchors are effectively embedded and then plain concrete is backfilled to form a stable slope support system. The reinforced concrete retaining wall can be built without excavating the original slope or foundation. The reinforced concrete retaining wall has good anti-overturning and anti-lateral displacement capabilities, and effective slope support can be formed without modifying the original building slope, controlling deformation, and playing a good reinforcement and protection role. BRIEF DESCRIPTION OF THE DRAWINGS
[0016] In order to more clearly illustrate the specific implementation methods of the utility model or the technical solutions in the prior art, the drawings required for use in the specific implementation methods or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are some implementation methods of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.
[0017] Figure 1 This is a structural side view of Example 1 of the utility model;
[0018] Figure 2 This is a structural front view of Example 1 of the utility model;
[0019] Figure 3 This is a steel bar structure diagram of a reinforced concrete retaining wall according to Example 1 of the present utility model;
[0020] Figure 4 This is a structural diagram of the steel flower pipe anchor of the utility model;
[0021] Figure 5 This is a structural diagram of a reinforced concrete retaining wall according to Embodiment 2 of the present utility model;
[0022] Description of reference numerals:
[0023] In the figure: 1-reinforced concrete retaining wall, 11-retaining wall steel bar, 12-extension joint, 13-drain hole, 2-steel flower pipe anchor, 21-steel stirrup frame, 22-grouting hole, 3-foundation reinforcement grouting body, 4-plain concrete, 5-original slope, 51-original slope ground line, 6-new slope foot ground line, 7-existing building, 8-anchor rod, 81-cross plate, 9-drainage trough; DETAILED DESCRIPTION
[0024] The technical solution of the utility model will be clearly and completely described below in conjunction with the embodiments. Obviously, the described embodiments are part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.
[0025] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise" and the like indicating directions or positional relationships are based on the directions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and therefore should not be understood as a limitation on the present invention.
[0026] In addition, the terms "first" and "second" are used for descriptive purposes only and cannot be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Therefore, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features. In the description of the present utility model, "multiple" means two or more, unless otherwise clearly and specifically defined. In addition, the terms "installed", "connected", and "connected" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal connection of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present utility model can be understood according to specific circumstances.
[0027] Example 1
[0028] like Figure 1-Figure 4 As shown:
[0029] A trenchless slope support structure for protecting existing buildings comprises a reinforced concrete retaining wall 1 in the shape of a vertical step, the bottom wall toe of the reinforced concrete retaining wall 1 is buried in the foundation, a steel pipe anchor 2 is arranged at the bottom of the reinforced concrete retaining wall 1 and the top is embedded and cast in the reinforced concrete retaining wall 1, the steel pipe anchor 2 is buried in the foundation and a foundation reinforcement grouting body 3 is cast on the outside, and plain concrete 4 is backfilled between the reinforced concrete retaining wall 1 and the original slope 5.
[0030] The reinforced concrete retaining wall 1 is narrow at the top and wide at the bottom. The reinforced concrete retaining wall 1 is made of a steel cage made of retaining wall steel bars 11 and poured concrete.
[0031] The top of the reinforced concrete retaining wall 1 is higher than the original slope ground line 51 , and the top of the reinforced concrete retaining wall 1 is 0.5 m higher than the original slope ground line 51 .
[0032] The bottom wall toe of the reinforced concrete retaining wall 1 is buried at a position greater than 0.2m below the ground line 6 of the new slope foot.
[0033] The height of reinforced concrete retaining wall 1 is 2.5m-4m, the width is 0.5m-1m, the toe width is 0.4m-0.8m, and its structure must comply with the requirements of the "04J008 Retaining Wall" atlas.
[0034] The reinforced concrete retaining wall 1 should be constructed in sections, blocks and slots. Before construction, the structural form, deformation, foundation burial depth and other current conditions of the original slope 5 retaining wall should be investigated and analyzed, and the original slope 5 retaining wall and the foundation behind the wall should be effectively protected. If necessary, temporary support measures should be set up, and monitoring should be strengthened to ensure the safety of existing buildings 7 and personnel.
[0035] The steel pipe anchors 2 are arranged in a plum blossom shape.
[0036] The steel pipe anchors 2 are arranged in two rows from front to back, with a longitudinal spacing of 1 m.
[0037] The steel flower pipe anchor 2 is made of a hot-rolled seamless steel pipe with a diameter of 42 mm, a length of 3 m, and a wall thickness of 3.5 mm. The bottom is conical, and four rows of grouting holes 22 with a diameter of 6 mm are opened around the pipe wall.
[0038] A steel bar stirrup frame 21 is welded to the top anchor head of the steel flower pipe anchor 2, and the steel bar stirrup frame 21 is made of steel bars and stirrups with a diameter of 6 mm.
[0039] The anchor head of the top 0.4 m of the steel pipe anchor 2 is embedded in the reinforced concrete retaining wall 1 , and the steel stirrup frame 21 is welded to the retaining wall steel bars 11 in the reinforced concrete retaining wall 1 .
[0040] The diameter of the foundation reinforcement grouting body 3 is 0.4 m, and the foundation reinforcement grouting body 3 is cast by cement-water-glass double liquid slurry.
[0041] Grouting is injected into the foundation through the grouting hole 22 by the steel tube anchor 2 to reinforce the foundation, and at the same time, the pull-out resistance of the steel tube anchor 2 is improved, thereby increasing the overall side sliding resistance of the slope support structure.
[0042] The reinforced concrete retaining wall 1 is provided with a deformation joint 12, which is filled with asphalt hemp tendons, elastic polyester foam or other waterproof elastic materials, with a filling depth of not less than 0.2m. The deformation joint 12 is opened longitudinally, and the interval between adjacent deformation joints 12 is 10m.
[0043] The drainage holes 13 are tilted outwards, the hole diameter of the drainage holes 13 is 100 mm, the distance between adjacent drainage holes 13 is 2-3 m, and they are arranged in a plum blossom shape, and the outward slope of the drainage holes 13 is 5%.
[0044] The height of the drainage hole 13 located at the bottom is 0.2 m higher than the height of the new slope foot ground line 6 .
[0045] Construction process:
[0046] Construct two rows of steel pipe anchors 2 in sequence by skipping holes, and set foundation reinforcement grouting. After the grouting body solidifies, the foundation reinforcement grouting body 3 is formed; construct the reinforced concrete retaining wall 1 by skipping chambers, firmly weld the steel pipe anchor 2 to the lower retaining wall steel bars 11 of the reinforced concrete retaining wall 1, and then pour concrete. When the retaining wall concrete reaches the specified strength, finally backfill with plain concrete 4 to form an integral slope support structure.
[0047] Example 2
[0048] like Figure 5 As shown, an anchor rod 8 is installed on the back of the reinforced concrete retaining wall 1. The anchor rod 8 is obliquely embedded in the plain concrete 4. The anchor rod 8 provides tension for the reinforced concrete retaining wall 1 to prevent the reinforced concrete retaining wall 1 from lateral overturning and improve the overall stability of the reinforced concrete retaining wall 1.
[0049] When installing the anchor rod 8 , the plain concrete 4 can be poured in sections or blocks, so as to facilitate adjustment of the installation position of the anchor rod 8 .
[0050] A horizontally mounted cross plate 81 is provided on the anchor rod 8, and the cross plate 81 is also arranged in the plain concrete 4, so as to further improve the anchoring ability of the anchor rod 8 and the lateral friction force of the anchor rod 8. At the same time, the cross plate 81 increases the contact area between the anchor rod 8 and the plain concrete 4, thereby stably supporting the reinforced concrete retaining wall 1 and enhancing the stability of the reinforced concrete retaining wall 1.
[0051] A drainage ditch 9 is opened at the position of the new slope foot ground line 6 near the reinforced concrete retaining wall 1. A grille is movably installed on the top of the drainage ditch 9. The drainage ditch 9 collects and diverts rainwater. The drainage ditch 9 can reduce the erosion of rainwater on the new slope foot ground line 6 and avoid affecting the anti-overturning ability of the reinforced concrete retaining wall 1.
[0052] The utility model forms a stable slope support system by installing steel pipe anchors and timely implementing foundation reinforcement grouting. When pouring reinforced concrete retaining walls, the steel pipe anchors are effectively embedded and then plain concrete is backfilled to form a stable slope support system. The reinforced concrete retaining wall can be built without excavating the original slope or foundation. The reinforced concrete retaining wall has good anti-overturning and anti-lateral displacement capabilities, and effective slope support can be formed without modifying the original building slope.
[0053] Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of the utility model, rather than to limit it. Although the utility model has been described in detail with reference to the aforementioned embodiments, ordinary technicians in this field should understand that they can still modify the technical solutions recorded in the aforementioned embodiments, or replace some or all of the technical features therein with equivalents. However, these modifications or replacements do not make the essence of the corresponding technical solution deviate from the scope of the technical solution of the embodiments of the utility model.
Claims
1. A trenchless slope support structure for protecting existing buildings, characterized in that: The invention comprises a reinforced concrete retaining wall (1) in the shape of a vertical step, wherein the bottom wall toe of the reinforced concrete retaining wall (1) is buried in the foundation, a steel pipe ground anchor (2) is arranged at the bottom of the reinforced concrete retaining wall (1) and the top is embedded and cast in the reinforced concrete retaining wall (1) and buried in the foundation, a foundation reinforcement grouting body (3) is cast outside the steel pipe ground anchor (2), and plain concrete (4) is backfilled between the reinforced concrete retaining wall (1) and the original slope (5).
2. The trenchless slope support structure for protecting existing buildings according to claim 1 is characterized in that: The reinforced concrete retaining wall (1) is narrow at the top and wide at the bottom, and the top of the reinforced concrete retaining wall (1) is higher than the original slope ground line (51).
3. The trenchless slope support structure for protecting existing buildings according to claim 2 is characterized in that: The top of the reinforced concrete retaining wall (1) is 0.5m higher than the original slope ground line (51), and the bottom wall toe of the reinforced concrete retaining wall (1) is buried at a position greater than 0.2m below the new slope foot ground line (6).
4. The trenchless slope support structure for protecting existing buildings according to claim 1 is characterized in that: The reinforced concrete retaining wall (1) has a height of 2.5m-4m, a width of 0.5m-1m, and a wall toe width of 0.4m-0.8m.
5. The trenchless slope support structure for protecting existing buildings according to claim 1 is characterized in that: The steel flower pipe anchors (2) are arranged in a plum blossom shape.
6. The trenchless slope support structure for protecting existing buildings according to claim 5 is characterized in that: The steel pipe anchors (2) are arranged in two rows from front to back, with a longitudinal spacing of 1 m.
7. The trenchless slope support structure for protecting existing buildings according to claim 1 is characterized in that: The steel flower pipe anchor (2) is made of a hot-rolled seamless steel pipe with a diameter of 42 mm, a length of 3 m and a wall thickness of 3.5 mm. The bottom is conical and four rows of grouting holes (22) with a diameter of 6 mm are opened around the pipe wall.
8. The trenchless slope support structure for protecting existing buildings according to claim 1 is characterized in that: A steel bar stirrup frame (21) is welded to the top anchor head of the steel tube ground anchor (2), the top anchor head of the steel tube ground anchor (2) is embedded in the reinforced concrete retaining wall (1), and the steel bar stirrup frame (21) is welded to the retaining wall steel bars (11) in the reinforced concrete retaining wall (1).
9. The trenchless slope support structure for protecting existing buildings according to claim 1 is characterized in that: The diameter of the foundation reinforcement grouting body (3) is 0.4 m, and the grouting material of the foundation reinforcement grouting body (3) is cement-water glass double liquid slurry.
10. The trenchless slope support structure for protecting existing buildings according to claim 1 is characterized in that: The reinforced concrete retaining wall (1) is provided with a deformation joint (12) and a drainage hole (13), and the deformation joint (12) is filled with asphalt hemp tendons; the drainage hole (13) is arranged to be inclined outward, and the drainage hole (13) located at the bottom is 0.2m higher than the ground line (6) of the new slope foot.