Retaining wall for terrace-type building slope and construction method thereof

Abstract

The present invention relates to the technical field of mountain development construction, and discloses a retaining wall for terrace-type building slope and a construction method thereof, comprising: a pile foundation, a cap, a vertical plate, a short beam and a load-relief plate; the cap is arranged on the top of the pile foundation, the bottom end of the vertical plate is arranged on the cap and its top extends upward, the short beam is arranged flush with the floor plate, and one end of the short beam is connected to the front side of the vertical plate, the other end of the short beam is abutted against the floor plate, the load-relief plate is arranged flush with the short beam, one end of the load-relief plate is connected to the rear side of the vertical plate, and the other end of the load-relief plate extends toward the rear; there is a soil-filling cavity between the rear side of the vertical plate and the upper platform building, and the soil-filling cavity is filled with backfill soil. The present invention can give full play to the advantageous role of the main structure of the building, ensure the horizontal anti-slip stability of the retaining wall, and save engineering costs.

Description

Technical Field

[0001] The invention relates to the technical field of mountain development and construction, and in particular to a retaining wall used for terrace-type building slopes and a construction method thereof. Background Art

[0002] With the acceleration of urbanization, mountain development and construction are becoming more and more common. In mountain building design, the collaboration between architecture, structure, and geotechnical disciplines is both close and complex. The rationality of the slope form is particularly important, which is directly related to the safety and social and economic benefits of the building. In most cases, mountain building design faces the challenge of complex terrain. In order to reduce the amount of excavation and filling engineering and obtain space that meets functional requirements, mountain building design usually does not stick to the traditional north-south layout, but mainly chooses to arrange it parallel to the contour lines. Therefore, in the direction perpendicular to the contour lines, a series of terrace-like landforms will be formed, see Figure 1 In this case, how to deal with the height difference between the upper and lower building platforms and what form of retaining wall to use become the key factors that determine whether the use function of mountain buildings can be realized and whether the safety of buildings can be guaranteed.

[0003] According to the relevant provisions of the Technical Specifications for Building Slope Engineering (GB50330-2012), the commonly used retaining wall forms for the height difference between building terraces include the slope method, gravity retaining wall, cantilever retaining wall, buttress retaining wall, column-slab retaining wall and anchor (rod) cable. However, these support forms are insufficient for terrace-type building slope engineering. For example, the slope method will lead to a large amount of excavation, thus affecting the building layout; gravity retaining wall, cantilever retaining wall and buttress retaining wall have a large structural footprint (the width of the retaining wall is usually 0.6 to 0.8 times the height of the retaining wall), which not only affects the building layout, but also their construction requires a process of excavation first and then filling. Only after completion can the construction of the upper terrace building be carried out, resulting in cumbersome construction procedures and possible delays in the project schedule. Although the column-slab retaining wall is relatively stable, the project cost is high and the construction is difficult (mostly involving large-section square or round piles). In addition, the soil in front of the wall can only be excavated and the construction of the lower terrace buildings can be carried out after completion. There are also problems of cumbersome construction procedures and delays in construction period. The use of anchor (rod) cables may affect the foundation layout of the upper terrace buildings.

[0004] The design principles of these retaining wall forms are usually based on the independent calculation of slope support and building structure, that is, the slope stability calculation only considers the retaining effect of the retaining wall itself, while ignoring the possible beneficial effects of the main building structure. This design idea does not fully consider the compact layout characteristics of terraced buildings, nor does it effectively integrate geotechnical and structural disciplines, thus failing to maximize the mechanical properties of slope support and building structure.

[0005] Therefore, it is very necessary to invent a retaining wall and a construction method thereof suitable for terrace type building slopes. Summary of the invention

[0006] The purpose of the invention is to design a retaining wall suitable for terrace-type building slopes and a construction method thereof.

[0007] In order to achieve the above-mentioned object, the present invention provides a retaining wall for the slope of a terraced building, wherein the terraced building comprises a lower terraced building and an upper terraced building spaced apart from each other, the lower terraced building comprises a floor slab, the retaining wall is arranged between the lower terraced building and the upper terraced building, and the retaining wall comprises: a pile foundation, a cap, a vertical plate, a short beam and a load-relief plate;

[0008] The pedestal is arranged on the top of the pile foundation, the bottom end of the vertical plate is arranged on the pedestal and the top end thereof extends upward, the short beam is arranged flush with the floor plate, and one end of the short beam is connected to the front side surface of the vertical plate, and the other end of the short beam abuts against the floor plate, the unloading plate is arranged flush with the short beam, one end of the unloading plate is connected to the rear side surface of the vertical plate, and the other end of the unloading plate extends toward the rear; there is a fill cavity between the rear side surface of the vertical plate and the upper platform building, and the fill cavity is filled with backfill soil.

[0009] Furthermore, the vertical plate includes a first vertical sub-plate and a second vertical sub-plate which are connected in sequence from top to bottom, the bottom end of the second vertical sub-plate is connected to the base, the short beam and the unloading plate are both arranged at the top end of the second vertical sub-plate, the second vertical sub-plate is provided with a drainage hole which passes through in the front-to-back direction, and the drainage hole is arranged to be inclined downward from the back to the front, the lower platform building, the short beam, the second vertical sub-plate and part of the base are enclosed and defined to form a dark channel cavity, and the drainage hole is communicated with the dark channel cavity.

[0010] Further, the height of the first vertical board is H1m, the size of the top end of the first vertical board in the front-to-back direction is L1m, and the size of the bottom end of the first vertical board in the front-to-back direction is L2m;

[0011] The height of the second vertical sub-board is H2m, the second vertical sub-board is arranged with equal width in the upper and lower parts, and the maximum dimension thereof in the front-back direction is L3m;

[0012] Among them, H1≤6, L1≥2, L2≥5, H2≤6, L3≥5.

[0013] Furthermore, the maximum dimension of the short beam in the up-down direction is H3m, and the maximum dimension of the short beam in the front-back direction is L4m, wherein H3≥3, and L4≥1.5.

[0014] Furthermore, the retaining wall is provided with a plurality of the short beams, and the short beams are sequentially spaced apart along the front-to-back direction, and the spacing distance between two adjacent short beams is less than or equal to 3m.

[0015] Furthermore, the maximum dimension of the unloading plate in the front-to-back direction is L5m, the upper plate surface of the unloading plate is at the same elevation as the upper beam surface of the short beam, the dimension of the front end of the unloading plate in the up-down direction is H4m, and the dimension of the rear end of the unloading plate in the up-down direction is H5m; wherein 0.6L1≤L5≤0.8L1, H4≥5, H5≥3.

[0016] Furthermore, a plurality of drainage holes are provided on the second vertical sub-plate, and the drainage holes are sequentially spaced apart in the front-to-back direction, and the spacing distance between two adjacent drainage holes is less than or equal to 3 m.

[0017] The present invention also provides a construction method for a retaining wall for a terrace-type building slope, which comprises the following steps:

[0018] S1 excavates the mountain to the predetermined bottom elevation of the retaining wall cap and levels the excavation section;

[0019] S2 constructs the pile foundation of the retaining wall and carries out the foundation construction of the upper and lower terrace buildings at the same time;

[0020] S3 constructs the retaining wall's cap, vertical slab, short beam and unloading slab, and simultaneously constructs the upper and lower terrace building frames, making the short beam press against the lower terrace building's floor slab during the short beam construction;

[0021] S4 backfills the earth filling cavity on the side of the retaining wall facing the upper terrace building;

[0022] S5 will level the outdoor ground of the upper and lower terraced buildings and improve the greening repair work.

[0023] Furthermore, S3 also includes: when constructing the retaining wall, digging drainage holes that penetrate along the front-to-back direction on the vertical plates of the retaining wall, and making the drainage holes tilt downward from the back to the front.

[0024] Furthermore, in S4, the backfill soil compaction coefficient of the backfill soil cavity is greater than or equal to 0.9.

[0025] Compared with the prior art, the retaining wall for terraced building slope and the construction method thereof according to the embodiment of the present invention have the following beneficial effects:

[0026] The retaining wall for the slope of a terraced building and the construction method thereof of the embodiment of the present invention organically combine the main structure of the terraced building with the slope retaining structure, and use short beams to fit closely with the floor slab of the lower terraced building to balance the horizontal earth pressure generated behind the retaining wall, so as to ensure the horizontal anti-slip stability of the retaining wall; use the vertical force of the unloading plate to produce a resisting bending moment on the pile foundation to reduce the eccentric effect of the earth pressure behind the retaining wall on the pile foundation, so as to ensure that the pile foundation can meet the vertical bearing capacity requirements; use the cap and the pile foundation to transfer the deadweight of the retaining wall and the weight of the soil above the unloading plate, and disperse them to the deep foundation, so as to further enhance the structural stability. The present invention gives full play to the advantageous role of the main structure of the building, and the retaining wall design does not need to consider the requirements of anti-slip, etc., which can save engineering costs and improve construction efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1 It is a schematic diagram of the layout of terraced buildings on the mountain slope;

[0028] Figure 2 It is a schematic structural diagram of a retaining wall for a terraced building slope according to an embodiment of the present invention;

[0029] Figure 3 It is a construction schematic diagram of S1 in the construction method of the retaining wall of the terraced building slope according to the embodiment of the present invention;

[0030] Figure 4 It is a construction schematic diagram of S2 in the construction method of the retaining wall of the terraced building slope according to an embodiment of the present invention;

[0031] Figure 5 It is a construction schematic diagram of S3 in the construction method of the retaining wall of the terraced building slope according to the embodiment of the present invention;

[0032] Figure 6 It is a construction schematic diagram of S4 in the construction method of the retaining wall of the terraced building slope according to an embodiment of the present invention;

[0033] Figure 7 The present invention is a simplified mechanical diagram of a retaining wall for a terraced building slope according to an embodiment of the present invention.

[0034] In the figure, 1, mountain; 2, lower terrace building; 21, floor slab; 3, upper terrace building; 31, outdoor ground; 4, retaining wall; 41, pile foundation; 42, pedestal; 43, vertical board; 431, first vertical sub-board; 432, second vertical sub-board; 44, short beam; 45, unloading plate; 46, drainage hole; 5, fill cavity; 6, culvert cavity. DETAILED DESCRIPTION

[0035] The specific implementation of the present invention is further described in detail below in conjunction with the accompanying drawings and examples. The following examples are used to illustrate the present invention, but are not intended to limit the scope of the present invention.

[0036] In the description of the present invention, it should be understood that the terms "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside" and "outside" used in the present invention to indicate the orientation or position relationship are based on the orientation or position relationship shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention.

[0037] In the description of the present invention, it should be understood that the terms "connected", "connected", "fixed" and the like used in the present invention 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 a welding connection; it can be directly connected or indirectly connected through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise clearly defined. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0038] The present invention uses the terms "first", "second", etc. to describe various information, but these information should not be limited to these terms, and these terms are only used to distinguish the same type of information from each other. For example, without departing from the scope of the present invention, "first" information may also be referred to as "second" information, and similarly, "second" information may also be referred to as "first" information.

[0039] The slope of the mountain 1 described in the present invention is inclined upward from the front to the back, and the upper terrace building 3 is located above the lower terrace building 2.

[0040] See attached Figure 2 A retaining wall 4 for a terraced building slope according to a preferred embodiment of the present invention, wherein the terraced building comprises a lower terraced building 2 and an upper terraced building 3 spaced apart from each other, the lower terraced building 2 comprises a floor plate 21, the retaining wall 4 is arranged between the lower terraced building 2 and the upper terraced building 3, and the retaining wall 4 comprises: a pile foundation 41, a cap 42, a vertical plate 43, a short beam 44 and a load-relief plate 45;

[0041] The pile cap 42 is provided at the top of the pile foundation 41. The bottom end of the vertical plate 43 is provided on the pile cap 42 and its top end extends upward. The short beam 44 is arranged flush with the floor slab 21. One end of the short beam 44 is connected to the front side of the vertical plate 43, and the other end of the short beam 44 abuts against the floor slab 21. The unloading plate 45 is arranged flush with the short beam 44. One end of the unloading plate 45 is connected to the rear side of the vertical plate 43, and the other end of the unloading plate 45 extends backward; there is a backfill cavity 5 between the rear side of the vertical plate 43 and the upper bench building 3, and the backfill cavity 5 is filled with backfill soil.

[0042] The retaining wall 4 is integrally made of reinforced concrete structure. Specifically: the short beam 44 and the floor slab 21 of the lower bench building 2 structure are designed at the same elevation and are closely attached to balance the horizontal earth pressure generated behind the retaining wall 4, which can ensure the horizontal anti-slip stability of the retaining wall 4; at the same time, the vertical force of the unloading plate 45 is used to generate a resisting moment on the pile foundation 41 to reduce the eccentric effect of the earth pressure behind the retaining wall 4 on the pile foundation 41 and ensure that the pile foundation 41 can meet the vertical bearing capacity requirements; the self-weight of the retaining wall 4 and the weight of the soil above the unloading plate 45 are transmitted to the pile foundation 41 through the pile cap 42 and are dispersed deep into the foundation to further enhance the structural stability.

[0043] Among them, the pile cap 42, as a conversion member, needs to meet the requirements of structural reinforcement and dimensions. For various parameters of the pile foundation 41, such as pile diameter, pile length, spacing, and reinforcement, etc., the relevant provisions of the "Technical Code for Building Pile Foundations" JGJ94 - 2008 shall be followed. The above are all conventional technical means in this field and will not be elaborated too much here.

[0044] In the application of the technical solution of the present application, the maximum dimension of the pile cap 42 in the front - rear direction is usually less than the sum of the maximum dimensions of the short beam 44 and the unloading plate 45 in the front - rear direction. Therefore, the retaining wall 4 of the present application is usually in a "plus" shape.

[0045] The drainage system is also an integral part of the building slope engineering. The retaining structure and the drainage system of the common retaining wall 4 are two independent parts. The drainage system includes drainage ditches, flood drainage channels, etc., which will bring a series of disadvantages such as occupying the building usable area and affecting the landscape effect.

[0046] In some improved schemes of the present application, the vertical plate 43 includes a first vertical sub-plate 431 and a second vertical sub-plate 432 which are connected in sequence from top to bottom, the bottom end of the second vertical sub-plate 432 is connected to the base 42, the short beam 44 and the unloading plate 45 are both arranged at the top of the second vertical sub-plate 432, the second vertical sub-plate 432 is provided with a drainage hole 46 which passes through in the front-to-back direction, and the drainage hole 46 is arranged to be inclined downward from the back to the front, the lower terrace building 2, the short beam 44, the second vertical sub-plate 432 and part of the base 42 enclose and define a dark channel cavity 6, and the drainage hole 46 is communicated with the dark channel cavity 6.

[0047] The natural cavity formed between the second vertical plate 432 and the lower terrace building 2 is set as a drainage culvert cavity 6 to form an open drainage culvert, which is convenient for obstacle removal and maintenance. At the same time, the groundwater behind the retaining wall 4 can be introduced into the culvert through the drainage hole 46 to reduce water and soil pressure and ensure the safety of the retaining wall 4.

[0048] In some improved schemes of the present application, the height of the first vertical sub-board 431 is H1m, the size of the top end of the first vertical sub-board 431 in the front-to-back direction is L1m, and the size of the bottom end of the first vertical sub-board 431 in the front-to-back direction is L2m; the height of the second vertical sub-board 432 is H2m, the second vertical sub-board 432 is set with equal width at the top and bottom and its maximum size in the front-to-back direction is L3m; wherein, H1≤6, L1≥2, L2≥5, H2≤6, L3≥5.

[0049] The thickness of the first vertical sub-plate 431 is its dimension in the front-to-back direction, and the thickness of the first vertical sub-plate 431 can be set in a non-equal width; the thickness of the second vertical sub-plate 432 is its dimension in the front-to-back direction, and the thickness of the second vertical sub-plate 432 is set in an equal width. The minimum thickness of the first vertical sub-plate 431 and the second vertical sub-plate 432 is set to ensure structural stability. When the retaining wall 4 is suitable for slope engineering of terraced buildings below 10m, the first vertical sub-plate 431 and the second vertical sub-plate 432 should not be too high. The first vertical sub-plate 431 is designed to be flush with the outdoor ground 31 of the upper terraced building 3, and the height of the second vertical sub-plate 432 is adapted to the height position of the short beam 44.

[0050] In some improved solutions of the present application, the maximum dimension of the short beam 44 in the vertical direction is H3m, and the maximum dimension of the short beam 44 in the front-rear direction is L4m, where H3≥3, and L4≥1.5. Specifically, the upper beam surface of the short beam 44 and the upper surface of the floor plate 21 are designed to be at the same elevation, and the beam thickness H3 is greater than 3m, and the beam length L4 is less than 1.5m to ensure its structural strength.

[0051] In some improved solutions of the present application, the retaining wall 4 is provided with a plurality of short beams 44, each of which is arranged in sequence along the front-to-back direction, and the interval between two adjacent short beams 44 is less than or equal to 3m. The plurality of short beams 44 can disperse and balance the horizontal earth pressure generated behind the retaining wall 4, and avoid excessive load on a single short beam 44.

[0052] In some improved solutions of the present application, the maximum dimension of the unloading plate 45 in the front-to-back direction is L5m, the upper plate surface of the unloading plate 45 is at the same elevation as the upper beam surface of the short beam 44, the dimension of the front end of the unloading plate 45 in the up-down direction is H4m, and the dimension of the rear end of the unloading plate 45 in the up-down direction is H5m; wherein 0.6L1≤L5≤0.8L1, H4≥5, H5≥3. That is, the upper plate surface of the unloading plate 45 is also designed to be at the same elevation as the upper surface of the floor plate 21, the length L5 of the unloading plate 45 is designed to be related to the height L1 of the first vertical sub-plate 431, the dimension of the unloading plate 45 in the up-down direction is its plate thickness, and the plate thickness of the unloading plate 45 can be set in a non-uniform width, and the plate thickness H5 of the cantilever end should not be less than 3m, and the plate thickness H4 of the root should not be less than 5m, so as to ensure the structural strength.

[0053] In some improved solutions of the present application, a plurality of drainage holes 46 are provided on the second vertical sub-plate 432, and the drainage holes 46 are arranged in sequence along the front-to-back direction, and the interval between two adjacent drainage holes 46 is less than or equal to 3m. The drainage holes 46 are closely spaced to facilitate the drainage of groundwater, wherein the drainage holes 46 can be arranged at a height of 500m on the table surface of the support platform 42.

[0054] The present invention also provides a construction method for a retaining wall 4 for a terrace-type building slope, which comprises the following steps:

[0055] S1: Excavate the mountain 1 to the predetermined bottom elevation of the retaining wall 4 cap 42, and level the excavation section. Figure 3 ;

[0056] S2 constructs the pile foundation 41 of the retaining wall 4, and at the same time carries out the foundation construction of the upper and lower platform buildings 2. The foundation construction of the upper and lower platform buildings includes the pile foundation 41 and the shallow foundation. Figure 4 ;

[0057] S3 constructs the cap 42, vertical plate 43, short beam 44 and unloading plate 45 of the retaining wall 4, and at the same time, constructs the frames of the upper and lower terrace buildings 2. When the short beam 44 is constructed, the short beam 44 is pressed against the floor plate 21 of the lower terrace building 2. See attached Figure 5 ;

[0058] S4 The first vertical plate 431 is designed to be flush with the outdoor ground 31 of the upper terrace building 3. After S3 is completed, the earth-filled cavity 5 on the side of the retaining wall 4 facing the upper terrace building 3 is backfilled until the earth-filled cavity 5 is flush with the vertical plate 43 and the outdoor ground 31 of the upper terrace building. Figure 6 .

[0059] S5: leveling the outdoor ground 31 of the upper and lower terraced buildings 2 and completing the greening and repair work.

[0060] The retaining wall 4 of the present application is superior to the commonly used gravity retaining wall 4 or buttress retaining wall 4 and other retaining wall 4 types, and the retaining wall 4 and the upper and lower terrace buildings 2 can be constructed simultaneously, which can improve the construction efficiency and greatly shorten the construction period.

[0061] In some improved schemes of the present application, the S3 also includes: when the retaining wall 4 is constructed, a drainage hole 46 is excavated on the vertical plate 43 of the retaining wall 4 so as to penetrate the vertical plate 43 in the front-to-back direction, and the drainage hole 46 is tilted downward from the back to the front, and a culvert is formed between the retaining wall 4 and the lower terrace building 2. The drainage hole 46 is provided to facilitate the drainage of the groundwater behind the retaining wall 4 into the culvert through the drainage hole 46.

[0062] In some improved solutions of the present application, in said S4, the backfill compaction coefficient of the backfill cavity 5 is greater than or equal to 0.9. That is, the volume of the backfill after compaction is reduced by at most 10% relative to the volume of its original loose state, so as to ensure the stability and bearing capacity of the backfill, enable it to resist external forces, and reduce settlement and deformation.

[0063] The calculation and verification of the retaining wall 4 support structure design in the technical solution of this application mainly include the following three aspects:

[0064] 1. Verification of the structural stability of retaining wall 4:

[0065] See attached Figure 7 The horizontal force is mainly composed of the reaction force F (unit: kN / m) provided by the main structure of the lower platform building 2, the active earth pressure E behind the first vertical sub-plate 431, and the a1 (unit: kN / m) and the active earth pressure E behind the second vertical plate 432 a2 (unit: kN / m). To ensure the stability of retaining wall 4, F ≥ E a1 +E a2 Since the volume of the lower terrace building 2 is large enough, the reaction force provided by its main structure is usually much greater than the earth pressure, so the horizontal stability of the retaining wall 4 structure generally does not require further verification.

[0066] 2. Calculation of vertical bearing capacity of pile foundation 41:

[0067] The vertical bearing capacity calculation of the pile foundation 41 needs to consider the deadweight G2 (unit kN / m) of the retaining wall 4, the weight G1 (unit kN / m) of the soil above the unloading plate 45, the bending moment M1 (unit kN*m) generated by G1, and the active earth pressure E behind the vertical plate 43. a1 +E a2 The generated overturning moment M2 (unit: kN*m). Under the combined effect of gravity and bending moment, the pile foundation 41 will be subjected to an eccentric vertical force N max (Unit: kN). To ensure safety, the vertical bearing capacity of the pile foundation 41 must meet N max ≤1.2R a , and the axial vertical force N should not be greater than R a , where R a The single pile bearing capacity characteristic value (unit: kN) represents the pile foundation 41. As a conversion component, the cap 42 does not need to be subjected to complex mechanical calculations, but only needs to meet the structural reinforcement requirements and ensure that its reinforcement ratio, steel bar lap and anchorage comply with the relevant provisions of the current national standard "Concrete Structure Design Code" GB50010.

[0068] 3. Calculation of compression, bending, shear and local compression bearing capacity of structural members such as vertical plate 43, short beam 44, unloading plate 45 and cap 42:

[0069] In the calculation of the retaining wall 4 components, the intersection of the vertical plate 43, the short beam 44 and the unloading plate 45 is regarded as a consolidation point. The first vertical plate 431, the short beam 44 and the unloading plate 45 are regarded as cantilever structures, and the deadweight of the component structure, the weight of the soil above the unloading plate 45 G1 and the active earth pressure E behind the first vertical plate 431 are required. a1 The second vertical sub-plate 432 is regarded as a simply supported beam hinged at both ends. The active earth pressure E behind the second vertical sub-plate 432 a2 Mechanical calculations are performed under the action of and reinforcement design is carried out accordingly. All reinforcement designs shall comply with the relevant provisions of the current national standard "Concrete Structure Design Code" GB50010.

[0070] In summary, the embodiment of the present invention provides a retaining wall 4 for terraced building slope and a construction method thereof, which has the following advantages:

[0071] 1. The main structure of the terraced building is organically combined with the slope retaining structure to maximize the use of the favorable factors of the main structure of the building, so that the main structure of the building on the lower terrace can effectively balance the earth pressure generated behind the retaining wall 4, ensuring the safety and reliability of the project and achieving the economic rationality of the project cost.

[0072] 2. The construction of the retaining wall 4 requires less site, which reduces the floor space during construction and reduces the construction difficulty. At the same time, the retaining wall 4 and the buildings on the upper and lower terraces can be constructed simultaneously, which simplifies the construction process, significantly shortens the construction period, and improves work efficiency.

[0073] 3. The drainage culvert of the retaining wall 4 is exquisitely designed, without occupying the usable area of ​​the building, and can maintain the good landscape effect of the terraced building. The groundwater behind the retaining wall 4 can be smoothly introduced into the culvert through the drainage hole 46, effectively reducing the water and soil pressure and ensuring the safety and stability of the retaining wall 4. In addition, the culvert adopts an open design, making obstacle removal and maintenance work more convenient.

[0074] The present invention is mainly applicable to slope projects of terraced buildings below 10 m. For slope projects of other heights or non-terraced buildings, those skilled in the art can make conventional replacements or adjustments based on actual conditions, and these replacement or adjustment schemes also fall within the scope of protection of this application.

[0075] The above is only a preferred embodiment of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and substitutions can be made without departing from the technical principles of the present invention. These improvements and substitutions should also be regarded as the scope of protection of the present invention.

Claims

1. A retaining wall for a terraced building slope, the terraced building comprising a lower terraced building and an upper terraced building spaced apart from each other, the lower terraced building comprising a floor slab, characterized in that: The retaining wall is arranged between the lower terrace building and the upper terrace building, and the retaining wall comprises: a pile foundation, a cap, a vertical plate, a short beam and a load-relief plate; The pedestal is arranged on the top of the pile foundation, the bottom end of the vertical plate is arranged on the pedestal and the top end thereof extends upward, the short beam is arranged flush with the floor plate, and one end of the short beam is connected to the front side surface of the vertical plate, and the other end of the short beam abuts against the floor plate, the unloading plate is arranged flush with the short beam, one end of the unloading plate is connected to the rear side surface of the vertical plate, and the other end of the unloading plate extends toward the rear; there is a fill cavity between the rear side surface of the vertical plate and the upper platform building, and the fill cavity is filled with backfill soil.

2. The retaining wall for terraced building slope according to claim 1, characterized in that: The vertical plate includes a first vertical sub-plate and a second vertical sub-plate which are connected in sequence from top to bottom. The bottom end of the second vertical sub-plate is connected to the base. The short beam and the unloading plate are both arranged on the top of the second vertical sub-plate. A drainage hole which passes through in the front-to-back direction is opened on the second vertical sub-plate, and the drainage hole is inclined downward from the back to the front. The lower platform building, the short beam, the second vertical sub-plate and part of the base are enclosed to form a dark channel cavity, and the drainage hole is communicated with the dark channel cavity.

3. The retaining wall for terraced building slope according to claim 2, characterized in that: The height of the first vertical board is H1m, the size of the top end of the first vertical board in the front-to-back direction is L1m, and the size of the bottom end of the first vertical board in the front-to-back direction is L2m; The height of the second vertical sub-board is H2m, the second vertical sub-board is arranged with equal width in the upper and lower parts, and the maximum dimension thereof in the front-back direction is L3m; Among them, H1≤6, L1≥2, L2≥5, H2≤6, L3≥5.

4. The retaining wall for terraced building slope according to claim 2, characterized in that: The maximum dimension of the short beam in the up-down direction is H3m, and the maximum dimension of the short beam in the front-back direction is L4m, wherein H3≥3, and L4≥1.

5.

5. The retaining wall for terraced building slope according to claim 4, characterized in that: The retaining wall is provided with a plurality of the short beams, and the short beams are sequentially spaced apart in the front-to-back direction, and the spacing distance between two adjacent short beams is less than or equal to 3m.

6. The retaining wall for terraced building slope according to claim 3, characterized in that: The maximum dimension of the unloading plate in the front-to-back direction is L5m, the upper plate surface of the unloading plate is at the same elevation as the upper beam surface of the short beam, the dimension of the front end of the unloading plate in the up-down direction is H4m, and the dimension of the rear end of the unloading plate in the up-down direction is H5m; wherein 0.6L1≤L5≤0.8L1, H4≥5, H5≥3.

7. The retaining wall for terraced building slope according to claim 2, characterized in that: The second vertical sub-plate is provided with a plurality of drainage holes, each of which is spaced in sequence along the front-to-back direction, and the spacing distance between two adjacent drainage holes is less than or equal to 3m.

8. A construction method for a retaining wall of a terraced building slope, used for a retaining wall of a terraced building slope as claimed in any one of claims 1 to 7, characterized in that: The following steps are involved: S1 excavates the mountain to the predetermined bottom elevation of the retaining wall cap and levels the excavation section; S2 constructs the pile foundation of the retaining wall and carries out the foundation construction of the upper and lower terrace buildings at the same time; S3 constructs the retaining wall's cap, vertical slab, short beam and unloading slab, and simultaneously constructs the upper and lower terrace building frames, making the short beam press against the lower terrace building's floor slab during the short beam construction; S4 backfills the earth filling cavity on the side of the retaining wall facing the upper terrace building; S5 will level the outdoor ground of the upper and lower terraced buildings and improve the greening repair work.

9. The method for constructing a retaining wall for a terraced building slope as claimed in claim 8, characterized in that: The step S3 also includes: during the construction of the retaining wall, a drainage hole is excavated on the vertical plate of the retaining wall so as to penetrate in the front-to-back direction, and the drainage hole is tilted downward from the back to the front.

10. The construction method of the retaining wall for terrace-type building slope according to claim 8, characterized in that: In S4, the backfill soil compaction coefficient of the backfill soil cavity is greater than or equal to 0.9.

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