Permanent and temporary combined retaining wall

Abstract

The utility model discloses a permanent and temporary combined retaining wall which comprises a retaining wall body structure, a foundation pit support structure and a foundation treatment structure. The retaining wall main body structure is used for forming an overall frame of the concrete retaining wall and comprises a concrete bottom plate, a concrete vertical wall, a concrete rib plate, a drainage pipe and an inverted filter bag. The foundation pit support structure is a construction temporary structure for stabilizing a foundation pit and comprises an underground diaphragm wall, cement mixing piles, steel pipe piles, top beams, steel enclosing purlins, concrete supports, steel supports and drainage ditches. The foundation treatment structure is used for improving the foundation bearing capacity of a supporting main body structure and comprises cement pile reinforcement and a pile foundation structure. The temporary foundation pit excavation range is small, the influence on the periphery is small, the retaining wall main body structure and the underground diaphragm wall jointly bear the horizontal load effect after being permanently and temporarily combined, the structural integrity is good, resources can be reasonably and effectively utilized, resource waste is avoided, and economic benefits are remarkable.

Description

Technical Field

[0001] This utility model relates to retaining wall structures in water conservancy projects, specifically to a retaining wall structure suitable for combining permanent retaining walls and temporary enclosure walls in water diversion and supply projects. Background Technology

[0002] Retaining walls are structures that support the roadbed fill or hillside soil and prevent the fill or soil from deforming and becoming unstable. In water conservancy projects, retaining walls are set up on the water-facing side to prevent water flow from scouring and eroding the roadbed. They are also an effective measure to reduce the compression of the riverbed or the occupation of reservoir capacity.

[0003] In water conservancy and drainage projects, an intake forebay is usually arranged upstream of the pumping station or sluice gate. The main functions of the intake forebay are to stabilize water pressure, balance water volume, distribute flow evenly, block sewage, and settle and remove silt. Its size is mainly determined by a combination of factors such as topographic and geological conditions, project layout requirements, land use scope, and improvement of water flow pattern, to ensure that the volume of the water in the forebay meets the relevant specifications.

[0004] When constructing the retaining wall of the forebay, the foundation pit is typically constructed using methods such as slope excavation, pile support, or diaphragm wall support. Slope excavation usually occupies a large area and involves a large volume of excavated soil. In areas with high land area requirements, pile or diaphragm wall retaining structures are typically used. Vertical excavation of the foundation pit can effectively save construction area and requires less excavated soil. However, the temporary retaining structure becomes useless after the retaining wall is completed, resulting in some waste of resources. Utility Model Content

[0005] The purpose of this utility model is to propose a combined permanent and temporary retaining wall. On the one hand, the temporary retaining structure of the retaining wall adopts underground continuous wall support, which can reduce the construction area and earthwork excavation, and has less impact on the surrounding environment. On the other hand, the underground continuous wall is pre-reserved with steel sleeves, which are effectively connected with the steel reinforcement of the retaining wall structure. After the combination, the retaining wall and the underground continuous wall jointly bear the horizontal load, which has good integrity and can effectively utilize resources and reduce waste.

[0006] The technical solution adopted in this utility model is:

[0007] A combined permanent and temporary retaining wall includes a main retaining wall structure, a foundation pit retaining structure, and a foundation treatment structure. The main retaining wall structure forms the overall frame of the concrete retaining wall. The foundation pit retaining structure is used to withstand the water and soil pressures generated during the excavation and unloading of the foundation pit of the main retaining wall structure, and transmits this pressure to the foundation treatment structure. It is a temporary construction structure for stabilizing the foundation pit. The foundation treatment structure is located below the main retaining wall structure and is used to improve the bearing capacity and deformation properties of the foundation supporting the main retaining wall structure.

[0008] Furthermore, the main structure of the retaining wall includes a concrete base slab, concrete vertical walls, concrete ribs, drainage pipes, and a filter bag. The concrete base slab is the part in direct contact with the foundation, used to bear the entire weight of the upper structure of the retaining wall and other vertical loads, and to transfer them to the foundation. It is made of reinforced concrete. The concrete vertical walls are located on the upper side of the concrete base slab and are vertically connected to it. They are integrally cast in concrete and are slightly thinner than the concrete base slab, used to support the soil. The concrete ribs connect the concrete base slab and the concrete vertical walls, serving as stiffeners to improve the stress conditions of the concrete base slab and the concrete vertical walls. The drainage pipes are located inside the concrete vertical walls and are arranged in a staggered pattern to drain water from the soil and reduce water pressure. The filter bag is located at the end of the drainage pipe on the side adjacent to the soil and wraps around the drainage pipe to prevent soil from being carried away during drainage, thereby preventing soil erosion.

[0009] Furthermore, the foundation pit retaining structure includes a diaphragm wall, cement mixing piles, steel pipe piles, a capping beam, steel walers, concrete supports, steel supports, and drainage ditches. The diaphragm wall is located on one side of the main retaining wall structure and is in direct contact with the soil. It is a reinforced concrete structure and serves as a water interception, seepage prevention, load-bearing, and soil retaining structure. The cement mixing piles are located on both sides of the diaphragm wall. Cement is sprayed into the soil as a curing agent and thoroughly mixed to harden the soft soil, thereby increasing the foundation strength and improving the stability of the trench wall during the trenching process of the diaphragm wall. The steel pipe piles are located on the other side of the main retaining wall structure and are also in direct contact with the soil as components for water interception, seepage prevention, and soil retaining. They are removed after the main retaining wall structure is completed. The capping beam is located at the top of the diaphragm wall and steel pipe piles, and is tightly connected to the diaphragm wall and steel pipe piles. It serves to transfer loads and enhance overall stability. The steel waler is located at the waist of the diaphragm wall and steel pipe piles, and serves to fix the internal support and transfer loads. The concrete support is located between the capping beam of the diaphragm wall and steel pipe piles, and is used to control the deformation at the top of the diaphragm wall and steel pipe piles. It is removed after the main structure of the retaining wall is completed. The steel support is located between the steel waler of the diaphragm wall and steel pipe piles, and is used to control the deformation at the waist of the diaphragm wall and steel pipe piles. It is removed after the main structure of the retaining wall is completed. The drainage ditch is located on both sides of the foundation pit elevation, and is used to cut off and drain surface water to prevent water from entering the foundation pit.

[0010] Furthermore, the foundation treatment structure is located below the concrete base slab and is used to improve the bearing capacity and deformation of the foundation supporting the main structure of the retaining wall. It includes cement piles and pile foundation structures. The cement piles are located below the concrete base slab and are in direct contact with it. Cement is sprayed into the soil as a curing agent and thoroughly mixed to harden the soft soil and improve the foundation strength. The pile foundation structure is located below the concrete base slab and is used to support the main structure of the retaining wall and bear the upper vertical and horizontal loads. It is constructed of reinforced concrete.

[0011] Furthermore, the retaining wall main structure and the underground continuous wall are connected by a connecting component, which includes a pre-set reinforcing bar and a reinforcing bar sleeve. The pre-set reinforcing bar is located inside the underground continuous wall, with one end firmly welded to the reinforcing bar of the underground continuous wall and the other end installed with a reinforcing bar sleeve. The reinforcing bar sleeve is a connector used to connect reinforcing bars and has an internal thread corresponding to the threaded thread, effectively connecting the reinforcing bars of the underground continuous wall with the reinforcing bars of the concrete base slab and the reinforcing bars of the concrete ribs.

[0012] Furthermore, a protective apron is provided on the water-facing side of the main structure of the retaining wall. The top elevation of the protective apron is the same as the front toe elevation of the main structure of the retaining wall, which is a hardened anti-scour structure of the bottom of the pool before water inflow.

[0013] Furthermore, a handrail is installed on the upper part of the concrete wall to ensure the safety of personnel passage.

[0014] Furthermore, backfill soil is filled between the concrete vertical wall and the underground continuous wall.

[0015] Furthermore, the top of the backfill soil is planted with green vegetation to improve the overall ecological environment.

[0016] The beneficial effects of this utility model are:

[0017] 1. Small excavation area and minimal impact on the surrounding environment. The temporary retaining structure during retaining wall construction uses diaphragm walls and steel pipe piles for support, which can reduce the construction area and earthwork excavation, and has a smaller impact on the surrounding environment;

[0018] 2. Good structural integrity. During the construction of the diaphragm wall, pre-installed steel sleeves effectively connect with the steel reinforcement of the main retaining wall structure. Combined, the retaining wall and the diaphragm wall share the horizontal load, resulting in good structural integrity.

[0019] 3. Effective resource utilization, reduced waste, and good economic benefits. The combination of temporary and permanent structures for foundation pit support ensures the effective use of temporary structures and avoids abandonment. Furthermore, the steel pipe piles and steel supports used in foundation pit support can be dismantled and reused, enabling rational and effective resource utilization, avoiding waste, and resulting in significant economic benefits. Attached Figure Description

[0020] Figure 1 This is a cross-sectional view of an embodiment of the present invention;

[0021] Figure 2 This is a cross-sectional view of the foundation pit support according to an embodiment of this utility model;

[0022] Figure 3 yes Figure 2 Section A-A;

[0023] Figure 4yes Figure 2 B-B section view;

[0024] Figure 5 yes Figure 1 C-C section view;

[0025] Figure 6 This is a detailed drawing of the connecting component according to an embodiment of the present utility model.

[0026] In the diagram: 1-Main structure of retaining wall; 11-Concrete base slab; 12-Concrete vertical wall; 13-Concrete rib plate; 14-Drainage pipe; 15-Filter bag; 2-Foundation pit retaining structure; 21-Diaphragm wall; 22-Cement mixing pile; 23-Steel pipe pile; 24-Cap beam; 25-Steel waler; 26-Concrete support; 27-Steel support; 28-Drainage ditch; 3-Foundation treatment structure; 31-Reinforced cement pile; 32-Concrete cast-in-place pile; 4-Connecting component; 41-Diaphragm wall reinforcement; 42-Concrete base slab reinforcement; 43-Concrete rib plate reinforcement; 44-Pre-set reinforcement; 45-Reinforcement sleeve; 5-Protective wall; 6-Handrail; 7-Backfill soil; 8-Greening and grass planting. Detailed Implementation

[0027] The present invention will now be described in further detail with reference to the accompanying drawings.

[0028] like Figures 1-6 As shown, this utility model discloses a permanent and temporary combined retaining wall, including a retaining wall main structure 1, a foundation pit retaining structure 2, a foundation treatment structure 3, connecting components 4, a retaining wall 5, handrails 6, backfill soil 7, and greening and grass planting 8.

[0029] The main structure 1 of the retaining wall forms the overall frame of the concrete retaining wall, including a concrete base slab 11, concrete vertical walls 12, concrete ribs 13, drainage pipes 14, and filter bags 15. The concrete base slab 11 is the part in direct contact with the foundation, bearing the entire weight of the upper structure of the retaining wall and other vertical loads, and transferring them to the foundation; it is a reinforced concrete structure. The concrete vertical walls 12 are located above the concrete base slab 11, perpendicularly connected to it, and slightly thinner than the base slab 11; they support the soil and are also reinforced concrete. The concrete ribs 13 connect the concrete base slab 11 and the concrete vertical walls 12, providing stiffness to improve the stress conditions between them. The drainage pipes 14 are located inside the concrete vertical walls 12, arranged in a staggered pattern, to drain moisture from the soil and reduce water pressure. The filter bags 15 are located at the ends of the drainage pipes 14 on the soil-facing side and wrap around them, preventing soil from being carried away during drainage and thus preventing soil erosion.

[0030] The foundation pit retaining structure 2 is used to bear the water pressure and soil pressure generated by the excavation and unloading of the foundation pit of the main retaining wall structure 1, and to transfer this pressure to the foundation treatment structure 3. It is a temporary construction structure for stabilizing the foundation pit, including underground continuous wall 21, cement mixing pile 22, steel pipe pile 23, capping beam 24, steel waler 25, concrete support 26, steel support 27, and drainage ditch 28. The diaphragm wall 21 is located on one side of the main retaining wall structure 1. It is a structure in direct contact with the soil, forming a continuous reinforced concrete wall underground, serving as a water-cutting, seepage-prevention, load-bearing, and retaining structure. Cement mixing piles 22 are located on both sides of the diaphragm wall 21. Cement is sprayed into the soil as a curing agent and thoroughly mixed to harden the soft soil, thereby increasing the foundation strength and improving the stability of the trench wall during the trenching process of the diaphragm wall 21. Steel pipe piles 23 are located on the other side of the main retaining wall structure 1. They are also in direct contact with the soil and serve as components for water-cutting, seepage prevention, and retaining. They are removed after the main retaining wall structure 1 is completed. The capping beam 24 is located at the top of the diaphragm wall 21 and the steel pipe piles 23, and is tightly connected to the diaphragm wall 21 and the steel pipe piles 23. The retaining wall 21 and the steel pipe pile 23 are connected to the steel waler 25, which is used to transfer loads and enhance overall stability. The steel waler 25 is located at the waist of the diaphragm wall 21 and the steel pipe pile 23, and plays the role of fixing internal support and transferring loads. The concrete support 26 is located between the cap beam 24 of the diaphragm wall 21 and the steel pipe pile 23, and is used to control the deformation of the top of the diaphragm wall 21 and the steel pipe pile 23. It is removed after the main structure of the retaining wall 1 is completed. The steel support 27 is located between the steel waler 25 of the diaphragm wall 21 and the steel pipe pile 23, and is used to control the deformation of the waist of the diaphragm wall 21 and the steel pipe pile 23. It is removed after the main structure of the retaining wall 1 is completed. The drainage ditch 28 is located on both sides of the foundation pit elevation, and is used to cut off and drain surface water to prevent water from entering the foundation pit.

[0031] The foundation treatment structure 3 is located below the concrete base slab 11 and is an engineering technique used to improve the bearing capacity and deformation properties of the foundation supporting the main structure 1 of the retaining wall. It includes reinforced cement piles 31 and cast-in-place concrete piles 32. The cement pile reinforcement 31 is located below the concrete base slab 11 and is in direct contact with the concrete base slab 11. It involves spraying cement as a curing agent into the soil and mixing it thoroughly to harden the soft soil and improve the foundation strength. The pile foundation structure 32 is located below the concrete base slab 11 and is used to support the main structure 1 of the retaining wall and bear the upper vertical and horizontal loads. It is generally a reinforced concrete structure.

[0032] The connecting component 4 is used to connect the main structure 1 of the retaining wall and the diaphragm wall 21, and includes a pre-installed reinforcing bar 44 and a reinforcing bar sleeve 45. The pre-installed reinforcing bar 44 is located inside the diaphragm wall 21, with one end firmly welded to the diaphragm wall reinforcing bar 41, and the other end is fitted with a reinforcing bar sleeve 45; the reinforcing bar sleeve 45 is a connector with an internal thread corresponding to the threaded thread, used to effectively connect the diaphragm wall reinforcing bar 41 with the concrete base slab reinforcing bar 42 and the concrete rib slab reinforcing bar 43.

[0033] Protective tank 5 is located on the water-facing side of the main structure 1 of the retaining wall. Its top elevation is the same as the front toe elevation of the main structure 1 of the retaining wall. It is a hardened anti-scour structure for the bottom of the inlet pool.

[0034] The handrail 6 is installed on the upper part of the concrete wall 12 as a safety facility to ensure the passage of people.

[0035] Backfill soil 7 is the soil that is returned and compacted after the main structure 1 of the retaining wall is completed, and it is located between the concrete vertical wall 12 and the underground continuous wall 21.

[0036] The greening and grass planting 8 is located on top of the backfill soil 7, and the overall ecological environment is improved by planting plants.

[0037] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A permanent-temporary combined retaining wall, characterized in that: It includes a retaining wall main structure, a foundation pit retaining structure, and a foundation treatment structure. The retaining wall main structure forms the overall frame of the concrete retaining wall. The foundation pit retaining structure is used to bear the water pressure and soil pressure generated by the excavation and unloading of the foundation pit of the retaining wall main structure, and transmits this pressure to the foundation treatment structure. It is a temporary construction structure for stabilizing the foundation pit. The foundation treatment structure is used to improve the bearing capacity and deformation properties of the foundation supporting the retaining wall main structure, and is located on the lower side of the retaining wall main structure.

2. The permanent-temporary combined retaining wall according to claim 1, characterized in that: The main structure of the retaining wall includes a concrete base slab, concrete vertical walls, concrete ribs, drainage pipes, and a filter bag; the concrete base slab is the part that is in direct contact with the foundation and is made of reinforced concrete; the concrete vertical walls are located on the upper side of the concrete base slab and are vertically connected to the concrete base slab, and are also made of reinforced concrete; the concrete ribs connect the concrete base slab and the concrete vertical walls. The drainage pipes are located inside the concrete vertical wall and are arranged in a quincunx pattern; the filter bag is located at the end of the drainage pipe on the soil side and wraps around the drainage pipe; The foundation pit retaining structure includes a diaphragm wall, cement mixing piles, steel pipe piles, a capping beam, steel walers, concrete supports, steel supports, and drainage ditches. The diaphragm wall is located on one side of the main retaining wall structure and is in direct contact with the soil, and is made of reinforced concrete. Cement mixing piles are located on both sides of the diaphragm wall. The steel pipe piles are located on the other side of the main retaining wall structure and are in direct contact with the soil; they are removed after the main retaining wall structure is completed. The capping beam is located at the top of the diaphragm wall and the steel pipe piles, connecting them. The steel walers are located at the waist of the diaphragm wall and the steel pipe piles. The concrete supports are located between the capping beam of the diaphragm wall and the steel pipe piles and are removed after the main retaining wall structure is completed. The steel supports are located between the diaphragm wall and the steel walers of the steel pipe piles and are removed after the main retaining wall structure is completed. The drainage ditch is located on both sides of the foundation pit elevation. The foundation treatment structure includes cement piles and pile foundation structure; the cement piles are located on the underside of the concrete base slab and are in direct contact with the concrete base slab; the pile foundation structure is located on the underside of the concrete base slab and is made of reinforced concrete.

3. The permanent-temporary combined retaining wall according to claim 2, characterized in that: The retaining wall main structure and the underground continuous wall are connected by a connecting component, which includes a pre-set reinforcing bar and a reinforcing bar sleeve. The pre-set reinforcing bar is located inside the underground continuous wall. One end of the pre-set reinforcing bar is firmly welded to the reinforcing bar of the underground continuous wall, and the other end is fitted with a reinforcing bar sleeve. The reinforcing bar sleeve is a connector used to connect reinforcing bars and has an internal thread corresponding to the threaded thread, connecting the reinforcing bars of the underground continuous wall with the reinforcing bars of the concrete base slab and the reinforcing bars of the concrete ribs.

4. The permanent-temporary combined retaining wall according to claim 1, 2, or 3, characterized in that: The main structure of the retaining wall is equipped with a protective apron on the water-facing side. The top elevation of the protective apron is the same as the front toe elevation of the main structure of the retaining wall, which is a hardened anti-scour structure of the bottom of the inlet pool.

5. The permanent-temporary combined retaining wall according to claim 2, characterized in that: The upper part of the concrete wall is equipped with a handrail.

6. The permanent-temporary combined retaining wall according to claim 2, characterized in that: The space between the concrete vertical wall and the underground continuous wall is filled with backfill soil.

7. The permanent-temporary combined retaining wall according to claim 6, characterized in that: The top of the backfill soil is planted with green grass.

Images