Permanent and temporary combined channel retaining wall
By designing a channel retaining wall that combines permanent and temporary structures, and utilizing precast sheet piles and composite structures, the problem of low comprehensive utilization of the support structure was solved, achieving efficient resource utilization and rapid, low-impact construction.
Patent Information
- Application Number
- CN202520207897.9
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-02-10
- Publication Date
- 2026-02-17
- Estimated Expiration
- 2035-02-10
AI Technical Summary
The existing support structures are not fully utilized in urban construction, resulting in resource waste and significant construction impact.
Design a channel retaining wall that combines permanent and temporary structures. Utilize precast sheet piles to replace cast-in-place structures, and combine them with slope protection, capping beams, channel bottom support structures, and plain concrete cushion layers to achieve the function of a permanent retaining wall while reducing excavation and land occupation and accelerating construction speed.
This enables the permanent use of the support structure, reduces project investment and the impact of construction on surrounding buildings, maintains the ecological environment, and improves construction efficiency and economy.
Smart Images
Figure CN223922113U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The utility model relates to city water conservancy projects, concretely is a permanent and temporary combined channel retaining wall. BACKGROUND
[0002] The construction sequence of cities is different, which leads to situations such as new channel construction around the built road or built building, channel reinforcement around the built road or built building, etc. The common channel construction sequence is: construction support structure - earthwork excavation - construction of permanent retaining wall structure - earthwork backfill - removal of support structure. The support structure only bears the role of temporary protection during construction, and after the project is completed, it is generally removed or abandoned, and the comprehensive utilization degree is not high. SUMMARY
[0003] In view of the problem that the existing support structure has low comprehensive utilization degree, the utility model provides a permanent and temporary combined channel retaining wall.
[0004] The utility model relates to a permanent and temporary combined channel retaining wall, which is arranged between a road and a water channel, and characterized in that the channel retaining wall comprises a slope protection, a crown beam, a sheet pile, a channel bottom support structure and a plain concrete cushion layer, wherein:
[0005] The slope protection comprises a slope section and a platform section, and the platform section is located on the water side;
[0006] The crown beam is arranged on the water side of the slope protection, the sheet pile is arranged below the crown beam, the bottom of the sheet pile is deep into the foundation, and the crown beam is fixedly connected with the sheet pile;
[0007] The channel bottom support structure and the plain concrete cushion layer are arranged in sequence downward at the bottom of the water channel, and the channel bottom support structure, the plain concrete cushion layer and the sheet pile are fixedly connected.
[0008] Specifically, the slope ratio of the slope section in the slope protection is 1:1.5 at least, and the slope protection adopts any one of grass protection, three-dimensional geotechnical net grass protection, ecological bag protection or concrete block protection, which meets the requirement of slope soil surface layer stability and restores the damaged natural ecological environment.
[0009] Specifically, the width of the platform section is 1.2m-2m, and the elevation is selected to be 50cm higher than the normal water level of the water channel, the platform section is exposed as a walking path in the dry season, the walking path is submerged in the flood season, the water passing area is increased, and the design flood discharge capacity of the river is ensured.
[0010] Specifically, the crown beam is made of cast-in-place reinforced concrete, the sheet pile is made of prefabricated prestressed reinforced concrete, and the crown beam is integrally connected with the sheet pile after being poured above the sheet pile. The sheet pile needs to bear large horizontal load and bending moment during support, and needs to have good transverse and torsional stiffness, so the crown beam needs to be arranged to increase the stiffness of the sheet pile, and the stability, durability and safety of the sheet pile are enhanced.
[0011] Specifically, the channel bottom support structure is in a grid shape, comprising waist beams on two sides, secondary beams parallel to the waist beams and support beams perpendicular to the waist beams, the waist beams are integrated with the sheet piles, the waist beams, the support beams and the secondary beams are made of reinforced concrete, and stones are laid between the waist beams, the support beams and the secondary beams. Compared with a traditional full-bottom pouring mode, the channel bottom support structure adopted by the utility model not only reduces the amount of reinforced concrete and lowers the engineering cost, but also maintains the connection between water in the channel and underground water, meets the growth needs of organisms and plants, is more economical and ecological, the bottom of the channel bottom support structure is provided with a plain concrete cushion layer, the plain concrete cushion layer disperses and buffers loads transmitted by the upper structure, helps to reduce foundation deformation, and the plain concrete cushion layer is constructed first, and then the channel bottom support structure is constructed, so that the construction quality of the channel bottom support structure can be ensured.
[0012] Furthermore, if the foundation is weak, cement mixing piles are arranged below the plain concrete cushion layer to improve the foundation bearing capacity.
[0013] It should be noted that the channel retaining wall of the utility model is applicable to sites mainly composed of cohesive soil, silt, sandy soil, local silt and silt soil, and is applicable to sites with miscellaneous fill layers, gravel soil layers or strongly weathered rocks, and the applicability should be determined through field tests.
[0014] The channel retaining wall of the utility model uses the temporary support structure used in the foundation pit support design as the permanent retaining wall of the channel, and uses prefabricated sheet piles to replace the cast-in-place mode of the existing support structure, so that the effect of retaining soil is achieved, and excavation land occupation, construction range and construction speed are reduced. Compared with other schemes, the channel retaining wall construction can reduce engineering investment and the influence of engineering on surrounding buildings. BRIEF DESCRIPTION OF DRAWINGS
[0015] Figure 1 It is a structural schematic view of the utility model.
[0016] Figure 2 It is a plan layout view of the channel bottom support structure.
[0017] Figure 3 It is a typical section view of the crown beam and the sheet pile.
[0018] Among them, the slope protection 1, the crown beam 2, the sheet pile 3, the channel bottom support structure 4 and the plain concrete cushion layer 5. DETAILED DESCRIPTION
[0019] Embodiment 1: A permanent and temporary combined channel retaining wall is arranged between a road and a water channel, and the channel retaining wall comprises a slope protection, a crown beam, a sheet pile, a channel bottom support structure and a plain concrete cushion layer, wherein:
[0020] The slope protection is composed of slope section and platform section, and the platform section is located on the water side; the slope ratio of the slope section is 1:1.5 at least, and the slope protection is planted with grass by using three-dimensional geotechnical net; the platform section is planted with small leaf Ficus microcarpa hedge on the water side to replace the railings to separate the road, the sidewalk and the channel, and to play a safe protection role and to form a good landscape effect; the platform section is paved with turf on the road side and extends to the sidewalk;
[0021] A crown beam is arranged on the water side of the slope protection, a sheet pile is arranged below the crown beam, the bottom of the sheet pile is deep into the foundation, and the crown beam is fixedly connected with the sheet pile; the sheet pile is a prefabricated C80 prestressed reinforced concrete structure, and a type II hollow flat sheet pile is used in the case; the crown beam is a cast-in-situ C40 reinforced expansive concrete structure and is located on the top of the sheet pile, and the originally dispersed sheet piles are connected into a whole after pouring; a rectangular planting groove is reserved on the top of the crown beam, the planting groove is slightly lower than the walking trail side by 50 mm on the water side to facilitate the plant hanging; a Marcgravia involucrate is planted in the planting groove; in order to better connect the crown beam and the sheet pile into a whole, 1000 mm of concrete is poured into the hollow part of the sheet pile downward during pouring of the crown beam, and a 5 mm thick circular steel plate is arranged at the bottom as a supporting plate; considering that the sheet pile needs to be provided with a steel pipe cross brace as a supporting structure, 350 mm long concrete is poured downward on the water side of the crown beam in the case, a steel plate is arranged on the surface at intervals, and the steel plate is welded with the steel bars anchored in the concrete.
[0022] A channel bottom support structure and a plain concrete cushion are arranged on the bottom of the channel in sequence, the channel bottom support structure is in a grid shape and includes waist beams on both sides, secondary beams parallel to the waist beams and support beams perpendicular to the waist beams, the waist beams are connected with the sheet piles into a whole, the waist beams, the support beams and the secondary beams are C35 cast-in-situ reinforced concrete structures, and block stones are arranged between the waist beams, the support beams and the secondary beams; a 10 cm thick C20 plain concrete cushion is arranged on the bottom of the beams; if the foundation is weak, a 1.5 m thick block stone replacement method is selected to improve the foundation bearing capacity.
Claims
1. A permanent-temporary combined channel retaining wall provided between a road and a water channel, characterized in that The channel retaining wall comprises a slope protection, a crown beam, sheet piles, a channel bottom support structure and a plain concrete cushion, wherein: The slope protection comprises a slope section and a platform section, and the platform section is located on the water side; The crown beam is arranged on the water side of the slope protection, and the sheet piles are arranged below the crown beam, with the bottom of the sheet piles extending into the foundation, and the crown beam is fixedly connected with the sheet piles; The channel bottom support structure and the plain concrete cushion are arranged in sequence on the bottom of the channel, and the channel bottom support structure and the plain concrete cushion are fixedly connected with the sheet piles.
2. A permanent temporary combined channel retaining wall as claimed in claim 1, wherein The slope ratio of the slope section of the slope protection is not less than 1:1.5, and the slope protection is any one of a grass protection, a three-dimensional geotechnical net cushion grass protection, an ecological bag protection or a concrete block protection.
3. A permanent temporary combined channel retaining wall as claimed in claim 1, wherein The width of the platform section is 1.2m-2m, and the elevation is 50cm higher than the normal water level of the channel.
4. A permanent temporary combined channel retaining wall as claimed in claim 1, wherein The crown beam is cast-in-situ reinforced concrete, and the sheet piles are precast prestressed reinforced concrete, and the crown beam is integrally connected with the sheet piles after being cast above the sheet piles.
5. A permanent temporary combined channel retaining wall as claimed in claim 1, wherein The channel bottom support structure is in a grid shape, comprising waist beams on both sides, secondary beams parallel to the waist beams and support beams perpendicular to the waist beams, the waist beams are integrally connected with the sheet piles, the waist beams, the support beams and the secondary beams are cast from reinforced concrete, and block stones are laid between the waist beams, the support beams and the secondary beams.
6. A permanent temporary combined channel retaining wall as claimed in claim 1, wherein Cement mixing piles are arranged below the plain concrete cushion to improve the bearing capacity of the foundation.