A special-shaped block post-cast light retaining wall support structure and its construction method

Abstract

The present invention discloses a special-shaped block post-cast light retaining wall support structure and a construction method thereof, comprising a standard special-shaped block, an end block, a steel bar skeleton, and an internal concrete core; the cross section of the standard special-shaped block is π-shaped, comprising a block panel, a reinforcing rib, a longitudinal steel bar groove, and a transverse steel bar groove; the end block is used for the end or corner of a closed box-type wall structure; the steel bar skeleton comprises longitudinal steel bars, transverse steel bars, and vertical steel bars; the standard special-shaped blocks and the end blocks are laid upward layer by layer according to the cross-sectional form of the retaining wall and the principle of staggered overlap up and down to form a closed box-type wall structure, and then poured in layers to form an internal concrete core. The present invention overcomes the drawbacks of the prior art that the vertical steel bars need to be inserted later and are easy to be cut off on a large scale, effectively ensures the bearing capacity of the wall, and does not require grouting. The retaining wall support structure of the present invention is simple, convenient to construct, and has an outstanding cost-effectiveness, and has a high level of innovation and engineering promotion and application value.

Description

Technical Field

[0001] The invention belongs to the field of roadbed engineering support structures, and in particular relates to a special-shaped block post-cast light retaining wall support structure and a construction method thereof. Background Art

[0002] Retaining walls refer to retaining structures that support roadbed fill, natural slopes, waterway and harbor revetments, landscape walls, and hillside soil. They mainly prevent fill or soil from deforming and becoming unstable. Among them, gravity retaining walls and light retaining walls are the most commonly used retaining wall structures in my country. Traditional light retaining walls mainly include cantilever and buttress structures, and mainly use cast-in-place concrete construction technology. Since the wall casting project requires repeated formwork erection and dismantling operations, large-scale formwork turnover is required, and the workload of on-site coordination is large.

[0003] Reinforced concrete block structure is a new type of structure that has been developed and widely used in recent years. It is widely used in the fields of construction, municipal roads, park landscape, etc. Under the condition of selecting reasonable reinforcement and concrete masonry materials, the reinforced concrete block structure has almost the same working performance as the cast-in-place structure. Most traditional concrete blocks are closed-end type. After the wall is built, it is necessary to insert vertical force-bearing steel bars, which makes it easy for the vertical force-bearing steel bars to be cut off on a large scale at the same cross-section position, seriously affecting the overall working performance of the wall structure. In addition, after the concrete block retaining wall is built, it is generally necessary to pour holes, but because the holes of the concrete blocks are relatively small, it is relatively difficult to vibrate the poured concrete. In addition, the horizontal steel bars of the traditional reinforced concrete block retaining wall are generally arranged in the mortar joints. The anchoring effect of the horizontal steel bars is mainly determined by the masonry bonding materials of the masonry structure, which is obviously not conducive to giving full play to the mechanical properties of the horizontal steel bars, and the arrangement of horizontal force-bearing steel bars in the mortar joints will further reduce the masonry performance of the concrete blocks. Summary of the invention

[0004] The purpose of the present invention is to overcome the deficiencies of the prior art and to provide a special-shaped block post-cast light retaining wall support structure with simple structure, convenient construction and reliable force bearing and a construction method thereof.

[0005] The technical purpose of the present invention is achieved through the following technical solutions.

[0006] A special-shaped block post-cast light retaining wall support structure comprises a standard special-shaped block, an end block, a steel skeleton and an internal concrete core.

[0007] The cross section of the standard special-shaped block is π-shaped, including an integrally cast block panel, two symmetrically vertically arranged reinforcing ribs on the same side of the block panel, and the upper surface of the block panel and the upper surface of the reinforcing rib are on the same horizontal plane, and the lower surface of the block panel and the lower surface of the reinforcing rib are also on the same horizontal plane; the reinforcing rib is sunken at the connection with the block panel to form a longitudinally penetrating steel bar groove, and the longitudinal steel bar groove is arranged in the horizontal direction; the upper surface of the reinforcing rib is provided with a transverse steel bar groove, and the extension line of the transverse steel bar groove is perpendicular to and intersects with the connection surface of the corresponding reinforcing rib and the block panel. Preferably, the groove depth of the longitudinal steel bar groove is not less than twice the groove depth of the transverse steel bar groove.

[0008] The steel bar skeleton comprises longitudinal steel bars, transverse steel bars and vertical steel bars.

[0009] On the basis of the anchoring of the cast-in-place foundation, the standard special-shaped blocks and the end blocks are arranged in the form of the retaining wall cross-section to form a closed space, and are built upward layer by layer according to the following overall principles to form a closed box-type wall structure: the upper and lower layers of standard special-shaped blocks are staggered and overlapped, each layer is composed of two opposite rows of standard special-shaped blocks, the two oppositely arranged standard special-shaped blocks in each layer are staggered with each other and their reinforcing ribs are aligned facing each other, and the reinforcing ribs on the upper and lower layers of standard special-shaped blocks are aligned with each other; the ends or corners of each layer of standard special-shaped blocks are closed by the end blocks to ensure the closedness of the closed box-type wall structure.

[0010] During the masonry process, a steel bar skeleton is arranged inside the closed box-type wall structure, wherein the longitudinal steel bars are arranged in the longitudinal steel bar grooves of a plurality of standard special-shaped blocks masonry on the same side, the transverse steel bars are arranged in the transverse steel bar grooves of two opposite reinforcing ribs, and the vertical steel bars are pre-arranged in the gap between two adjacent reinforcing ribs and vertically penetrate the entire closed box-type wall structure and are connected to the concrete foundation steel bars in the cast-in-place foundation anchor. The closed box-type wall structure can be a cantilever retaining wall structure or a buttress retaining wall structure. After the closed box-type wall structure is completed, the curing age is not less than 7 days, and then the internal concrete core is formed by layered pouring from bottom to top in the closed box-type wall structure by post-pouring.

[0011] In one embodiment of the present invention, the end block is a functional auxiliary block formed by removing a reinforcing rib on the basis of a standard special-shaped block, or adding an end panel perpendicular to the block panel in the vertical direction on the basis of half of a standard special-shaped block, and the steel skeleton also includes a longitudinal steel bar arranged in a transverse steel bar groove on the reinforcing rib of the opposite end block.

[0012] In one embodiment of the present invention, the standard special-shaped block further includes two transverse reinforcement anchor holes, which are respectively arranged between the block panel and the reinforcing rib in the vertical direction; the transverse reinforcement is an inverted U-shape, and the two ends of the transverse reinforcement are respectively inserted into the corresponding transverse reinforcement anchor holes of the standard special-shaped block. The transverse reinforcement anchor hole is a circular hole structure, and the hole depth is not less than 100 mm.

[0013] In one embodiment of the present invention, the vertical steel bar is fixed at a middle position between two adjacent reinforcing ribs by a temporary fixing buckle.

[0014] The construction method of the special-shaped block post-cast light retaining wall support structure of the present invention comprises the following steps:

[0015] Step 1: Tie up the concrete foundation steel bars and the vertical steel bars in the steel skeleton, and pour the foundation concrete;

[0016] Step 2: According to the cross-section type of the cantilever or buttress retaining wall, lay the bottom standard special-shaped blocks and end blocks to form a closed rectangular structure on the plane, and lay the longitudinal and transverse steel bars at the corresponding positions according to the strength requirements;

[0017] Step 3: Repeat step 2, and build the closed box-shaped wall structure by staggered masonry upwards in sequence, and construct the closed box-shaped wall structure to the designed height; when the cross-section type of the retaining wall is buttress type, the buttress board of the buttress type retaining wall needs to be vertically sloped;

[0018] Step 4: Maintain the closed box wall structure to the design age and pour the internal concrete core in layers.

[0019] The present invention has the following beneficial effects:

[0020] (1) The special-shaped block post-cast lightweight retaining wall support structure of the present invention does not require the use of concrete formwork during the construction process, reducing the amount of concrete formwork to zero, significantly reducing the workload of on-site coordination;

[0021] (2) The vertical steel bars in the present invention are located in the open space and can be pre-buried, thereby avoiding the vertical steel bar insertion operation in the construction of traditional reinforced concrete block retaining walls and the occurrence of large-scale truncation of vertical steel bars during this operation, ensuring the upper and lower connectivity of the stressed steel bars, and being able to give full play to the load-bearing performance of the vertical steel bars;

[0022] (3) The special-shaped blocks of the present invention are open structures, and the horizontally arranged steel bars are located in the steel bar grooves reserved in the special-shaped blocks, which ensures the interaction between the horizontal force-bearing steel bars and the concrete special-shaped blocks. At the same time, the light retaining wall support structure of the present invention satisfies the staggered masonry of the concrete blocks, thereby enhancing the anchoring connection between the blocks, the force-bearing steel bars, and the post-cast concrete;

[0023] (4) The present invention adopts special-shaped standard blocks to form a closed box-shaped wall structure, and the concrete core formed by the post-cast concrete is a continuous structure, with better casting and vibration performance. The integrity of the completed special-shaped block post-cast light retaining wall support structure is close to that of a cast-in-place structure;

[0024] (5) The supporting structure of the present invention has a simple structure and is easy to construct. It has good overall performance, great engineering application prospects, and outstanding cost performance. It is the key optimization and improvement direction of the retaining structure of the earth-fill roadbed retaining wall. It has broad application space and promotion and application value in the construction of transportation projects such as railways, highways, and municipal roads. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1a It is a schematic diagram of the three-dimensional structure of the standard special-shaped block in the present invention;

[0026] Figure 1b is a top view of a standard special-shaped block in the present invention;

[0027] Figure 1c It is a side view of the standard special-shaped block in the present invention;

[0028] Figure 2a It is a schematic diagram of the top view of the structure of the end block formed by removing a reinforcing rib on the basis of the standard special-shaped block in the present invention;

[0029] Figure 2b It is a schematic diagram of the top view of the structure of an end block formed by adding an end panel on the basis of half of a standard special-shaped block in the present invention;

[0030] Figure 3a It is a three-dimensional structural schematic diagram of the special-shaped block post-cast cantilever light retaining wall support structure of the present invention;

[0031] Figure 3b It is a schematic diagram of the horizontal cross-section structure of the special-shaped block post-cast cantilever light retaining wall support structure of the present invention;

[0032] Figure 3c It is a schematic diagram of the longitudinal section structure of the special-shaped block post-cast cantilever light retaining wall support structure of the present invention;

[0033] Figure 4 It is a three-dimensional structural schematic diagram of the special-shaped block post-cast buttress light retaining wall supporting structure of the present invention.

[0034] Reference numerals:

[0035] 1-standard special-shaped block; 1(a)-block panel; 1(b)-reinforcement rib; 1(c)-longitudinal steel bar groove; 1(d)-transverse steel bar groove; 1(e)-transverse steel bar anchor hole; 2-end block; 2(a)-end panel; 3-closed box-type wall structure; 4-steel skeleton; 4(a)-longitudinal steel bar; 4(b)-transverse steel bar; 4(c)-vertical steel bar; 5-concrete core. DETAILED DESCRIPTION

[0036] The technical solution of the present invention is described in detail below with reference to the accompanying drawings and specific embodiments.

[0037] like Figures 1a to 4 As shown, a special-shaped block post-cast light retaining wall support structure of the present invention includes a standard special-shaped block 1, an end block 2, a steel skeleton 4 and an internal concrete core 5.

[0038] The cross section of the standard special-shaped block 1 is π-shaped, including an integrally cast block panel 1(a), two symmetrically vertically arranged reinforcing ribs 1(b) on the same side of the block panel 1(a), and the upper surface of the block panel 1(a) and the upper surface of the reinforcing rib 1(b) are on the same horizontal plane, and the lower surface of the block panel 1(a) and the lower surface of the reinforcing rib 1(b) are also on the same horizontal plane; the reinforcing rib 1(b) is sunken at the connection with the block panel 1(a) to form a longitudinally penetrating steel bar groove 1(c), and the longitudinal steel bar groove 1(c) is horizontally extending. The reinforcing rib 1(b) is provided with a transverse steel bar groove 1(d) on its upper surface, and the extension line of the transverse steel bar groove 1(d) is perpendicular to and intersects with the connection surface between the corresponding reinforcing rib 1(b) and the block panel 1(a); a transverse steel bar anchor hole 1(e) is provided between the block panel 1(a) and the reinforcing rib 1(b) along the vertical direction, and the extension line of the transverse steel bar anchor hole 1(e) is perpendicular to and intersects with the extension line of the corresponding transverse steel bar groove 1(d); wherein the groove depth of the longitudinal steel bar groove 1(c) is not less than 2 times the groove depth of the transverse steel bar groove 1(d); the transverse steel bar anchor hole 1(e) is a circular hole structure, and the hole depth is not less than 100mm.

[0039] The end block 2 is a functional auxiliary block formed by removing a reinforcing rib 1 (b) from a standard special-shaped block 1, or adding an end panel 2 (a) perpendicular to the block panel 1 (a) in the vertical direction on the basis of half of the standard special-shaped block 1, and is used to close the end or corner of the box-type wall structure 3 to ensure the closedness of the closed box-type wall structure 3.

[0040] The steel bar skeleton 4 includes longitudinal steel bars 4 (a), transverse steel bars 4 (b) and vertical steel bars 4 (c).

[0041] On the basis of the cast-in-place foundation anchoring, the standard special-shaped blocks 1 and the end blocks 2 are arranged in the form of the retaining wall cross-section to form a closed space, and are built upward layer by layer according to the following overall principle to form a closed box-shaped wall structure 3: the upper and lower layers of standard special-shaped blocks 1 are staggered and overlapped, and each layer is composed of two opposite rows of standard special-shaped blocks 1, and the two oppositely arranged standard special-shaped blocks 1 in each layer are staggered and their reinforcing ribs 1(b) are aligned facing each other, and the reinforcing ribs 1(b) on the upper and lower layers of standard special-shaped blocks 1 are aligned with each other, and the ends or corners of each layer of standard special-shaped blocks 1 are closed by the end blocks 2; during the building process, a steel skeleton 4 is arranged inside the closed box-shaped wall structure 3, wherein: two longitudinal steel bars 4(a) are arranged in the longitudinal steel bar grooves 1(c) of multiple standard special-shaped blocks 1 built on the same side, and another longitudinal steel bar 4(a) is arranged on the reinforcing rib 1 of the opposite end block 2. (b); the transverse reinforcement 4(b) is an inverted U-shape, arranged in the transverse reinforcement groove 1(d) of the two opposite reinforcing ribs 1(b) on the left and right, and the two ends are respectively inserted into the transverse reinforcement anchor holes 1(e) of the corresponding standard special-shaped blocks 1; the vertical reinforcement 4(c) is pre-arranged, fixed in the middle position between the two adjacent reinforcing ribs 1(b) by a temporary fixing buckle, and vertically runs through the entire closed box-type wall structure 3, and is connected to the concrete foundation reinforcement in the cast-in-place foundation anchor. The closed box-type wall structure 3 can be a cantilever retaining wall structure or a buttress retaining wall structure. After the closed box-type wall structure 3 is built, the curing age is not less than 7 days, and then the internal concrete core 5 is formed by layered pouring from bottom to top in the closed box-type wall structure 3 by post-pouring.

[0042] The construction method of the special-shaped block post-cast light retaining wall support structure of the present invention comprises the following steps:

[0043] Step 1: Tie the concrete foundation steel bars and the vertical steel bars 4 (c) in the steel skeleton 4, and pour the foundation concrete;

[0044] Step 2: According to the cantilever or buttress retaining wall section type, lay the bottom standard special-shaped blocks 1 and the end blocks 2 to form a closed rectangular structure on the plane, and lay the longitudinal steel bars 4 (a) and transverse steel bars 4 (b) at the corresponding positions according to the strength requirements;

[0045] Step 3: Repeat step 2, and build up layer by layer according to the following overall principle to form a closed box-shaped wall structure 3, and construct the closed box-shaped wall structure 3 to the designed height: the upper and lower layers of standard special-shaped blocks 1 are staggered and overlapped, each layer is composed of two opposite rows of standard special-shaped blocks 1, the two oppositely arranged standard special-shaped blocks 1 in each layer are staggered with each other and their reinforcing ribs 1 (b) are aligned facing each other, the reinforcing ribs 1 (b) on the upper and lower layers of standard special-shaped blocks 1 are aligned with each other, and the ends or corners of each layer of standard special-shaped blocks 1 are closed by the end blocks 2; when the cross-section type of the retaining wall is a buttress type, the buttress plates of the buttress retaining wall need to be vertically sloped;

[0046] Step 4: Maintain the closed box wall structure to the design age and pour the concrete core in layers.

[0047] Design, production and implementation process of the special-shaped block post-cast light retaining wall support structure of the present invention:

[0048] like Figure 1a , 1b As shown in 1c, the design and production of the standard special-shaped block 1 is formed by casting fine stone concrete. First, the template structure of the standard special-shaped block is designed and completed. The template structure can be a steel mold coated with a release agent; secondly, fine stone concrete is cast in the designed and completed standard special-shaped block template structure, and after vibration compaction, it is demolded after curing for 2 to 3 days, and then cured for no less than 28 days until the block reaches the design strength; finally, the cast standard special-shaped block is an open π-shaped block, and the block body should include five parts: block panel 1 (a), reinforcing rib 1 (b), longitudinal steel bar groove 1 (c), transverse steel bar groove 1 (d) and transverse steel bar anchor hole 1 (e). Among them, the groove depth of the longitudinal steel bar groove 1 (c) should not be less than twice the groove depth of the transverse steel bar groove 1 (d), and the transverse steel bar anchor hole 1 (e) is a circular hole structure with a hole depth of no less than 100 mm. In addition, by modifying the standard special-shaped block mold, such as Figure 2a and 2b As shown, the end block 2 can be cast and formed, and can be built together with the standard heterogeneous block 1 to ensure the plane closure of the closed box-type wall structure.

[0049] like Figure 3a , 3bAs shown in 3c, the design and production of the post-cast cantilever light retaining wall with special-shaped blocks, first of all, should level the site, vibrate and compact the retaining wall foundation, tie the concrete foundation steel bars and the vertical steel bars 4(c) in the steel skeleton, pour the foundation concrete, and maintain the foundation concrete for not less than 7 days; then, lay the first layer of masonry blocks of the cantilever retaining wall, and lay the protective closed box-type wall structure 3 according to the following overall principles: the upper and lower layers of standard special-shaped blocks 1 are staggered and overlapped, and each layer is composed of two opposite rows of standard special-shaped blocks 1, and the two oppositely arranged standard special-shaped blocks 1 in each layer are staggered with each other and their reinforcing ribs 1(b) are aligned with each other, and the reinforcing ribs 1(b) on the upper and lower layers of standard special-shaped blocks 1 are aligned with each other, and each layer The ends or corners of the standard special-shaped blocks 1 are closed by the end blocks 2; during the masonry process, the embedded vertical steel bars 4(c) are fixed to the middle position of the adjacent reinforcing ribs 1(b) by means of temporary fixing buckles, and the longitudinal steel bars 4(a) are laid in the longitudinal steel bar grooves 1(c) and the transverse steel bars 4(b) are laid in the transverse steel bar grooves 1(d) according to the design requirements, and the two ends of the transverse steel bars 4(b) are inserted into the transverse steel bar anchor holes 1(e) to form an integral steel bar skeleton 4; then, the above process is repeated, and the masonry is staggered upward to the designed height in sequence, and the wall is maintained for a period of not less than 7 days. Finally, the internal concrete core 5 is poured in layers in the closed box-type wall structure 3, and after vibrating and compacting, it is maintained to the designed age.

[0050] like Figure 4 As shown, the design and production of the special-shaped block post-cast buttress light retaining wall, the masonry of the closed box-shaped wall structure 3, the erection of the steel skeleton 4, and the pouring of the internal concrete core 5 are the same as the above-mentioned special-shaped block post-cast cantilever light retaining wall, only the design and production of the buttress wall is added. In the design and production of the buttress wall, the overlap of the blocks between the buttress wall and the wall panel must be processed to ensure the effective transition and overlap of the buttress wall of the buttress retaining wall and the special-shaped block masonry of the wall panel; in addition, the buttress wall in the special-shaped block post-cast buttress light retaining wall is stepped along the wall height direction.

[0051] In summary, the construction method of the special-shaped block post-cast light retaining wall support structure of the present invention has completed a lot of innovations in the block structure form, the pouring method of the hole concrete, the steel bar anchoring method, etc. compared with the traditional retaining wall. It can ensure the vertical continuity of the vertical steel bars without large-scale interruption and overlap. The post-cast concrete core is a continuous structure with better pouring and vibration performance. The integrity of the completed special-shaped block post-cast light retaining wall support structure is close to that of the cast-in-place structure. As a form of retaining wall support structure for roadbed engineering, this new structure has a simpler structure, more convenient construction, huge engineering application prospects, and outstanding cost performance. It is the key optimization and improvement direction of the retaining wall support structure of fill roadbed, meets the actual needs of various types of transportation engineering construction in my country, and has a high level of innovation and engineering promotion and application value.

[0052] The above is a detailed description of the specific embodiments of the present invention, but the contents are only preferred embodiments of the present invention and cannot be considered to limit the scope of implementation of the present invention. All equivalent changes and improvements made according to the scope of application of the present invention should still fall within the scope of the patent coverage of the present invention.

Claims

1. A special-shaped block post-cast light retaining wall support structure, characterized in that: It comprises a standard special-shaped block (1), an end block (2), a steel skeleton (4) and an internal concrete core (5); The cross section of the standard special-shaped block (1) is π-shaped, comprising an integrally cast block panel (1(a)), two symmetrically vertically arranged reinforcing ribs (1(b)), and the upper surface of the block panel (1(a)) and the upper surface of the reinforcing rib (1(b)) are on the same horizontal plane, and the lower surface of the block panel (1(a)) and the lower surface of the reinforcing rib (1(b)) are also on the same horizontal plane; the reinforcing rib (1(b)) is sunken at the connection with the block panel (1(a)) to form a longitudinally penetrating steel bar groove (1(c)), and the longitudinal steel bar groove (1(c)) is arranged in the horizontal direction; the upper surface of the reinforcing rib (1(b)) is provided with a transverse steel bar groove (1(d)), and the extension line of the transverse steel bar groove (1(d)) is perpendicular to and intersects with the connection surface between the corresponding reinforcing rib (1(b)) and the block panel (1(a)); The steel reinforcement skeleton (4) comprises longitudinal steel bars (4(a)), transverse steel bars (4(b)) and vertical steel bars (4(c)); On the basis of the cast-in-place foundation anchoring, the standard special-shaped blocks (1) and the end blocks (2) are arranged in the form of a retaining wall cross-section to form a closed space, and are built upward layer by layer according to the following overall principle to form a closed box-shaped wall structure (3): the upper and lower layers of standard special-shaped blocks (1) are staggered and overlapped, each layer is composed of two opposite rows of standard special-shaped blocks (1), the two oppositely arranged standard special-shaped blocks (1) in each layer are staggered and their reinforcing ribs (1(b)) are aligned facing each other, the reinforcing ribs (1(b)) on the upper and lower layers of standard special-shaped blocks (1) are aligned with each other, and the ends or corners of each layer of standard special-shaped blocks (1) are closed by the end blocks (2); During the masonry process, a steel skeleton (4) is arranged inside the closed box-shaped wall structure (3), wherein the longitudinal steel bars (4(a)) are arranged in the longitudinal steel bar grooves (1(c)) of the standard special-shaped blocks (1) masonry on the same side, the transverse steel bars (4(b)) are arranged in the transverse steel bar grooves (1(d)) of two left and right opposite reinforcing ribs (1(b)), and the vertical steel bars (4(c)) are pre-arranged in the gap between two adjacent reinforcing ribs (1(b)) and vertically penetrate the entire closed box-shaped wall structure (3) and are connected to the concrete foundation steel bars in the cast-in-place foundation anchor. After the masonry is completed, the closed box-shaped wall structure (3) is maintained to the designed age, and then the internal concrete core (5) is formed by layered pouring from bottom to top in the closed box-shaped wall structure (3) by post-casting.

2. The special-shaped block post-cast light retaining wall support structure according to claim 1 is characterized in that: The end block (2) is a functional auxiliary block formed by removing a reinforcing rib (1(b)) from a standard special-shaped block (1), or by adding an end panel (2(a)) perpendicular to the block panel (1(a)) in the vertical direction on the basis of half of the standard special-shaped block (1). The steel skeleton (4) also includes a longitudinal steel bar (4(a)) arranged in a transverse steel bar groove (1(d)) on the reinforcing rib (1(b)) of the opposite end block (2).

3. The special-shaped block post-cast light retaining wall support structure according to claim 1 is characterized in that: The standard special-shaped block (1) also includes two transverse steel bar anchor holes (1(e)), which are respectively arranged between the block panel (1(a)) and the reinforcing rib (1(b)) in the vertical direction; the transverse steel bar (4(b)) is an inverted U-shape, and the two ends of the transverse steel bar (4(b)) are respectively inserted into the corresponding transverse steel bar anchor holes (1(e)) of the standard special-shaped block (1).

4. The special-shaped block post-cast light retaining wall support structure according to claim 3 is characterized in that: The transverse reinforcement anchor hole (1(e)) is a circular hole structure, and the hole depth is not less than 100 mm.

5. The special-shaped block post-cast light retaining wall support structure according to claim 1 is characterized in that: The groove depth of the longitudinal steel bar groove (1(c)) is not less than twice the groove depth of the transverse steel bar groove (1(d)).

6. The special-shaped block post-cast light retaining wall support structure according to claim 1 is characterized in that: The vertical steel bar (4(c)) is fixed at the middle position between two adjacent reinforcing ribs (1(b)) by means of a temporary fixing buckle.

7. The special-shaped block post-cast light retaining wall support structure according to claim 1 is characterized in that: The closed box-shaped wall structure (3) is a cantilever retaining wall structure or a buttress retaining wall structure.

8. The special-shaped block post-cast light retaining wall support structure according to claim 1 is characterized in that: After the closed box-type wall structure (3) is completed, the curing period is not less than 7 days.

9. The construction method of the special-shaped block post-cast light retaining wall support structure according to any one of claims 1 to 8, characterized in that: The following steps are involved: Step 1: Tie the concrete foundation steel bars and the vertical steel bars (4(c)) in the steel frame (4), and pour the foundation concrete; Step 2: According to the cantilever or buttress retaining wall section type, lay the bottom standard special-shaped blocks (1) and the end blocks (2) to form a closed rectangular structure on the plane, and lay the longitudinal steel bars (4 (a)) and transverse steel bars (4 (b)) at the corresponding positions according to the strength requirements; Step 3: Repeat step 2, and sequentially build the closed box-shaped wall structure (3) with staggered joints upwards, and construct the closed box-shaped wall structure (3) to the designed height; Step 4: Maintain the closed box wall structure (3) to the designed age, and pour the internal concrete core (5) in layers.

10. The construction method of the special-shaped block post-cast light retaining wall support structure according to claim 9, characterized in that: In step 3, when the cross-section type of the retaining wall is buttress type, the buttress panels of the buttress retaining wall need to be vertically sloped.

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