A retaining structure and its construction method

Abstract

Embodiments of the present invention provide a retaining structure and a construction method thereof, relating to the technical field of retaining structures. The retaining structure includes retaining piles, a first precast concrete slab and a second precast concrete slab which are oppositely arranged, and a capping beam concrete layer is arranged between the first precast concrete slab and the second precast concrete slab. Both the first precast concrete slab and the second precast concrete slab are installed on the top of the retaining piles. Among them, the capping beam concrete layer, the first precast concrete slab and the second precast concrete slab jointly form a capping beam, and the retaining piles are connected to the capping beam concrete layer of the capping beam. By arranging the first precast concrete slab and the second precast concrete slab on the retaining piles, the method of making the capping beam by on-site formwork support and then pouring concrete is replaced, and there is no need to demolish the first precast concrete slab and the second precast concrete slab, reducing the construction difficulty of the capping beam, improving the operation efficiency, reducing the cost and reducing the potential safety hazards.

Description

Technical Field

[0001] The present invention relates to the technical field of retaining structures, and more specifically, to a retaining structure and a construction method thereof. Background Art

[0002] In a sheet pile retaining structure, to ensure the coordination of the structure's stress and deformation, a continuous concrete beam, namely a capping beam or a crown beam, needs to be cast at its top to connect the retaining members into a whole.

[0003] In the prior art, the application of a capping beam or a crown beam basically adopts on-site formwork support and then concrete casting. When the dry construction conditions are available, the formwork support difficulty is relatively small. If it is a wading project, there is water on both sides or one side of the retaining piles, without a natural bottom formwork, and the support of the side formwork is also relatively difficult, which brings great difficulties to the construction of the capping beam or the crown beam. At the same time, a relatively complex formwork support system needs to be set up, the construction operation is difficult, the efficiency is low, the comprehensive cost is high, and there are certain safety hazards. Summary of the Invention

[0004] The present invention provides a retaining structure and a construction method thereof, which can reduce the construction difficulty of the capping beam, improve the operation efficiency, reduce the cost, and reduce the safety hazards.

[0005] The embodiments of the present invention can be implemented as follows:

[0006] In a first aspect, the present invention provides a retaining structure, including:

[0007] Retaining piles; and

[0008] First and second precast concrete slabs arranged oppositely, and a capping beam concrete layer is provided between the first precast concrete slab and the second precast concrete slab, and both the first precast concrete slab and the second precast concrete slab are installed on the top of the retaining piles;

[0009] Wherein, the capping beam concrete layer, the first precast concrete slab and the second precast concrete slab jointly form a capping beam;

[0010] The retaining piles are connected to the capping beam concrete layer of the capping beam.

[0011] In an alternative embodiment, a plurality of longitudinal construction bars are provided in the capping beam concrete layer, the first precast concrete slab is connected with a first stirrup, the second precast concrete slab is connected with a second stirrup, and one end of the first stirrup away from the first precast concrete slab is fixedly connected to one end of the second stirrup away from the second precast concrete slab; the longitudinal construction bar is connected to the adjacent first stirrup or the second stirrup.

[0012] In an alternative embodiment, the cross-section of the first precast concrete slab is L-shaped, and the cross-section of the second precast concrete slab is L-shaped.

[0013] In an alternative embodiment, the first precast concrete slab and the second precast concrete slab are made of fiber concrete or concrete with a strength grade above C40.

[0014] In an alternative embodiment, the first precast concrete slab has a first surface and a second surface facing away from each other. The first surface is a smooth surface or a textured surface, and the second surface is a roughened surface, which is used to contact the capping beam concrete layer.

[0015] Moreover, the second precast concrete slab has a third surface and a fourth surface facing away from each other. The third surface is a smooth surface or a textured surface, and the fourth surface is a roughened surface, which is used to contact the capping beam concrete layer.

[0016] In an alternative embodiment, the first precast concrete slab includes a plurality of first plate bodies spliced in sequence. The splicing surfaces of at least two adjacent first plate bodies are inclined surfaces, so that the adjacent first plate bodies are spliced at an angle. The second precast concrete slab includes a plurality of second plate bodies spliced in sequence. The splicing surfaces of at least two adjacent second plate bodies are inclined surfaces, so that the adjacent second plate bodies are spliced at an angle.

[0017] In an alternative embodiment, the first precast concrete slab includes a plurality of third plate bodies spliced in sequence. The splicing surfaces of adjacent third plate bodies have a socket and spigot structure. The second precast concrete slab includes a plurality of fourth plate bodies spliced in sequence. The splicing surfaces of adjacent fourth plate bodies have a socket and spigot structure.

[0018] In an alternative embodiment, a first connecting sleeve, a second connecting sleeve, a first sleeve longitudinal limiting steel bar, and a second sleeve longitudinal limiting steel bar are arranged in the retaining pile. One end of the first sleeve longitudinal limiting steel bar is connected to the end plate of the retaining pile, and the other end is connected to the first connecting sleeve. One end of the second sleeve longitudinal limiting steel bar is connected to the end plate of the retaining pile, and the other end is connected to the second connecting sleeve. The first connecting sleeve and the second connecting sleeve are arranged along the radial direction of the retaining pile.

[0019] In an alternative embodiment, the retaining pile is connected with anchor bars or a steel reinforcement cage is arranged in the retaining pile, and the anchor bars or the steel reinforcement cage extend into the capping beam concrete layer.

[0020] In a second aspect, the present invention provides a construction method for a retaining structure, which applies the retaining structure described in the foregoing embodiments. The construction method includes:

[0021] Install a support structure on the retaining pile;

[0022] Connect the anchor reinforcement to the retaining pile or place the steel reinforcement cage in the retaining pile and pour concrete.

[0023] Capping beam fabrication: Use the first precast concrete slab and the second precast concrete slab as the side forms of the capping beam. Lift the side forms of the capping beam to the support structure, configure the longitudinal structural reinforcement, and pour concrete between the first precast concrete slab and the second precast concrete slab to form the capping beam concrete layer.

[0024] Remove the support structure after reaching the form removal strength.

[0025] In an alternative embodiment, the step of installing the support structure on the retaining pile includes:

[0026] Fix both the first support and the second support to the retaining pile.

[0027] Set the bottom form on both the first support and the second support simultaneously.

[0028] Wherein, the support structure includes a bottom form, a first support, and a second support.

[0029] In an alternative embodiment, the step of installing the support structure on the retaining pile further includes:

[0030] Fix the first stop block at the end of the first support and the second stop block at the end of the second support.

[0031] Wherein, the support structure further includes a first stop block and a second stop block. The first stop block is used to limit the bottom form and the first precast concrete slab, and the second stop block is used to limit the bottom form and the second precast concrete slab.

[0032] In an alternative embodiment, the step of installing the support structure on the retaining pile further includes:

[0033] At the positions of the first connecting sleeve and the second connecting sleeve of the retaining pile, there are a first steel plate and a second steel plate. The first steel plate and the second steel plate are respectively connected to the first support and the second support. Pass the first fixing member through the first waist-shaped hole of the first steel plate and connect it to the first connecting sleeve to fasten the first support and the retaining pile.

[0034] Pass the second fixing member through the second waist-shaped hole of the second steel plate and connect it to the second connecting sleeve to fasten the second support and the retaining pile.

[0035] In an alternative embodiment, the capping beam fabrication step includes pre-connecting the first stirrups of the first precast concrete slab and the second stirrups of the second precast concrete slab together, lifting the connected first precast concrete slab and the second precast concrete slab above the retaining pile, then configuring the longitudinal structural reinforcement, and finally pouring concrete to form the capping beam.

[0036] In an alternative embodiment, in the step of fabricating the capping beam, after the first precast concrete slab and the second precast concrete slab are hoisted into place, the through bolts sequentially pass through the first cushion wood board, the first precast concrete slab, the second precast concrete slab, and the second cushion wood board; wherein both the first precast concrete slab and the second precast concrete slab are L-shaped.

[0037] In a third aspect, the present invention provides a construction method for a retaining structure, applying the retaining structure described in the foregoing embodiments, the construction method comprising:

[0038] Connecting anchor bars to the retaining piles or placing steel cages in the retaining piles and pouring concrete;

[0039] The through bolts sequentially pass through the first cushion block, the first precast concrete slab, the supporting beam, the second precast concrete slab, and the second cushion block; the first stirrup of the first precast concrete slab and the second stirrup of the second precast concrete slab are connected together, and the connected first precast concrete slab and the second precast concrete slab are hoisted above the retaining piles;

[0040] Meanwhile, install the bottom formwork, the first fixing clip and the second fixing clip. Among them, connect the first fixing clip to the first precast concrete slab, make the lower side of the first fixing clip abut against the retaining pile, the bottom formwork is clamped between the first precast concrete slab and the lower end of the first fixing clip, and the side of the bottom formwork abuts against the retaining pile; connect the second fixing clip to the second precast concrete slab, make the lower side of the second fixing clip abut against the retaining pile, and the bottom formwork is clamped between the second precast concrete slab and the lower end of the second fixing clip;

[0041] Install longitudinal structural bars and pour capping beam concrete;

[0042] After reaching the formwork removal strength, remove the support structure;

[0043] Wherein, the support structure includes a bottom formwork, through bolts, a first fixing clip and a second fixing clip, wherein the first fixing clip and the second fixing clip are of a C-shaped structure or an F-shaped structure.

[0044] The beneficial effects of the retaining structure and its construction method of the embodiments of the present invention include, for example:

[0045] The present invention provides a retaining structure. The retaining structure includes a retaining pile, a first precast concrete slab and a second precast concrete slab which are oppositely arranged, and a capping beam concrete layer is provided between the first precast concrete slab and the second precast concrete slab. Both the first precast concrete slab and the second precast concrete slab are installed at the top of the retaining pile. Among them, the capping beam concrete layer, the first precast concrete slab and the second precast concrete slab jointly form a capping beam, and the retaining pile is connected to the capping beam concrete layer of the capping beam. By arranging the first precast concrete slab and the second precast concrete slab on the retaining pile, the method of using on-site formwork and then pouring concrete to make the capping beam is replaced, and it is not necessary to demolish the first precast concrete slab and the second precast concrete slab, reducing the construction difficulty of the capping beam, improving the operation efficiency, reducing the cost and reducing the safety hazards.

[0046] The present invention provides a construction method for a retaining structure, which applies the above-mentioned retaining structure. The construction method includes: installing a support structure on the retaining pile; connecting anchor bars on the retaining pile or placing a steel cage in the retaining pile and pouring concrete; capping beam fabrication: using the first precast concrete slab and the second precast concrete slab as the side formwork of the capping beam, hoisting the side formwork of the capping beam to the support structure, configuring longitudinal structural bars, and pouring concrete between the first precast concrete slab and the second precast concrete slab to form a capping beam concrete layer; demolishing the support structure after reaching the formwork removal strength. The construction method of this retaining structure does not need to demolish the first precast concrete slab and the second precast concrete slab, reducing the construction difficulty of the capping beam, improving the operation efficiency, reducing the cost and reducing the safety hazards.

[0047] The present invention provides a construction method for a retaining structure. Applying the above-mentioned retaining structure, the construction method includes: connecting anchor bars to the retaining piles or placing steel reinforcement cages in the retaining piles and pouring concrete; passing through bolts successively through the first cushion blocks, the first precast concrete slabs, the support beams, the second precast concrete slabs, and the second cushion blocks; connecting the first stirrups of the first precast concrete slab and the second stirrups of the second precast concrete slab together, and hoisting the connected first precast concrete slab and the second precast concrete slab above the retaining piles; simultaneously installing the bottom formwork, the first fixing clamp, and the second fixing clamp. Among them, connecting the first fixing clamp to the first precast concrete slab, making the lower side of the first fixing clamp abut against the retaining pile, the bottom formwork is clamped between the first precast concrete slab and the lower end of the first fixing clamp, and the side of the bottom formwork abuts against the retaining pile; connecting the second fixing clamp to the second precast concrete slab, making the lower side of the second fixing clamp abut against the retaining pile, and the bottom formwork is clamped between the second precast concrete slab and the lower end of the second fixing clamp; installing longitudinal structural bars and pouring the concrete of the beam cap; removing the support structure after reaching the formwork removal strength; among them, the support structure includes the bottom formwork, the through bolts, the first fixing clamp, and the second fixing clamp, and among them, the first fixing clamp and the second fixing clamp are in a C-shaped structure or an F-shaped structure. This construction method for the retaining structure does not require removing the first precast concrete slab and the second precast concrete slab, reduces the construction difficulty of the capping beam, improves the operation efficiency, reduces the cost, and reduces the potential safety hazards. BRIEF DESCRIPTION OF THE DRAWINGS

[0048] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the following will briefly introduce the drawings required to be used in the embodiments. It should be understood that the following drawings only show some embodiments of the present invention, and therefore should not be regarded as a limitation of the scope. For those of ordinary skill in the art, without creative efforts, other relevant drawings can also be obtained based on these drawings.

[0049] Figure 1 The first sectional view of the retaining structure provided in the first embodiment of the present invention;

[0050] Figure 2 is Figure 1 the top view of;

[0051] Figure 3 The sectional view of the first precast concrete slab provided in the first embodiment of the present invention;

[0052] Figure 4 The second sectional view of the retaining structure provided in the first embodiment of the present invention;

[0053] Figure 5 The schematic diagram of the first kidney-shaped hole of the first steel plate provided in the first embodiment of the present invention;

[0054] Figure 6Cross-sectional view of the first connecting sleeve provided in Embodiment 1 of the present invention;

[0055] Figure 7 Schematic diagram of the first sleeve lateral limiting steel bar provided in Embodiment 1 of the present invention;

[0056] Figure 8 Schematic diagram of the first plate body provided in Embodiment 1 of the present invention;

[0057] Figure 9 Schematic diagram of the third plate body provided in Embodiment 1 of the present invention;

[0058] Figure 10 Schematic diagram of the retaining pile provided with a reserved hole in Embodiment 1 of the present invention;

[0059] Figure 11 For Figure 10 Top view;

[0060] Figure 12 Cross-sectional view of the retaining structure provided in Embodiment 2 of the present invention;

[0061] Figure 13 For Figure 12 Top view;

[0062] Figure 14 Schematic diagram of the first precast concrete slab provided in Embodiment 2 of the present invention;

[0063] Figure 15 Cross-sectional view of the retaining structure provided in Embodiment 3 of the present invention;

[0064] Figure 16 For Figure 15 Top view.

[0065] Icons: 100 - Support piles; 110 - Bearing plates; 121 - Inserted steel bars; 122 - Spiral stirrups; 101 - Reserved holes; 102 - Installation grooves; 200 - First precast concrete slab; 210 - First slab body; 211 - Inclined surface; 220 - Third slab body; 221 - Socket; 201 - First stirrup; 202 - First surface; 203 - Second surface; 204 - Reserved holes in precast slab; 300 - Second precast concrete slab; 301 - Second stirrup; 302 - Third surface; 303 - Fourth surface; 400 - Capping beam concrete layer; 500 - First cushion wood board; 600 - Second cushion wood board; 700 - Bracket structure; 710 - Bottom formwork; 720 - First bracket; 730 - Second bracket; 740 - First stop block; 750 - Second stop block; 760 - First connecting sleeve; 761 - Connecting hole; 770 - Second connecting sleeve; 780 - First longitudinal limiting steel bar of sleeve; 790 - Second longitudinal limiting steel bar of sleeve; 701 - First fixing piece; 702 - Second fixing piece; 703 - First transverse limiting steel bar of sleeve; 800 - First fixing clamp; 900 - Second fixing clamp; 10 - Longitudinal construction steel bars; 20 - Through bolts; 30 - First wooden square; 40 - Second wooden square; 50 - Capping beam reinforcement cage; 51 - Capping beam stirrups; 52 - Longitudinal construction steel bar strips; 53 - Longitudinal stressed steel bars; 61 - First wooden square cushion block; 62 - First backing plate; 63 - Second backing plate; 64 - Second wooden square cushion block; 65 - Support beam; 66 - Fixed rod; 70 - Gasket; 80 - Longitudinal main steel bars; 90 - Third stirrup; 1000 - First steel plate; 1001 - First kidney-shaped hole; 2000 - Second steel plate. Detailed implementation manners

[0066] To make the objectives, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are some, but not all, of the embodiments of the present invention. Usually, the components of the embodiments of the present invention described and illustrated in the accompanying drawings here can be arranged and designed in various different configurations.

[0067] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the claimed present invention, but merely represents selected embodiments of the present invention. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts fall within the scope of protection of the present invention.

[0068] It should be noted that: Similar reference numerals and letters denote similar items in the following drawings. Therefore, once an item is defined in one drawing, it does not need to be further defined and explained in subsequent drawings.

[0069] In the description of the present invention, it should be noted that if terms such as "upper", "lower", "inner", "outer", etc. are used to indicate the orientation or positional relationship, it is based on the orientation or positional relationship shown in the drawings, or the orientation or positional relationship in which the invention product is usually placed during use. This is 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. Therefore, it should not be construed as a limitation to the present invention.

[0070] In addition, if terms such as "first", "second", etc. are only used for distinguishing descriptions, they cannot be understood as indicating or implying relative importance.

[0071] It should be noted that, without conflict, the features in the embodiments of the present invention can be combined with each other.

[0072] As mentioned in the background art, in the sheet pile retaining structure, in order to ensure the coordination of the structure's force and deformation, it is necessary to pour a continuous concrete beam at its top, that is, the capping beam or top beam, to connect the retaining members into a whole.

[0073] In the prior art, the application of the capping beam (i.e., top beam) basically adopts on-site formwork support and then pours concrete. When the dry construction conditions are available, the formwork support difficulty is relatively small. If it is a wading project, there is water on both sides or one side of the retaining pile, there is no natural bottom formwork, and the support of the side formwork is also relatively difficult, which brings great difficulty to the construction of the capping beam. At the same time, it is necessary to set up a relatively complex formwork support system, with large construction operation difficulty, low efficiency, high comprehensive cost, and there are certain potential safety hazards.

[0074] In view of this, please refer to Figures 1-16 , the retaining structure and its construction method provided in the embodiments of the present invention can solve this problem, and the following will describe it in detail.

[0075] Embodiment 1

[0076] Please first refer to Figure 1 and Figure 2 , the present invention provides a retaining structure, which includes a retaining pile 100 and relatively arranged first precast concrete slabs 200 and second precast concrete slabs 300, and a capping beam concrete layer 400 is provided between the first precast concrete slab 200 and the second precast concrete slab 300. Both the first precast concrete slab 200 and the second precast concrete slab 300 are installed on the top of the retaining pile 100; wherein, the capping beam concrete layer 400, the first precast concrete slab 200 and the second precast concrete slab 300 together form the capping beam.

[0077] By setting the first precast concrete slab 200 and the second precast concrete slab 300 on the retaining pile 100, it replaces the method of using in-situ formwork and then pouring concrete to make the capping beam, and there is no need to demolish the first precast concrete slab 200 and the second precast concrete slab 300, reducing the construction difficulty of the capping beam, improving the operation efficiency, reducing the cost, and reducing the safety hazards.

[0078] In this embodiment, the retaining pile 100 can be understood as a precast slab pile.

[0079] Please refer to Figure 3 and in combination with Figure 1 , specifically, in this embodiment, both the first precast concrete slab 200 and the second precast concrete slab 300 are precast and formed concrete composite slabs. The first precast concrete slab 200 has a first surface 202 and a second surface 203 facing away from each other. The first surface 202 is a smooth surface or a textured surface, and the second surface 203 is a roughened surface. The second surface 203 is used to contact the capping beam concrete layer 400.

[0080] And the second precast concrete slab 300 has a third surface 302 and a fourth surface 303 facing away from each other. The third surface 302 is a smooth surface or a textured surface, and the fourth surface 303 is a roughened surface. The fourth surface 303 is used to contact the capping beam concrete layer 400.

[0081] Both the first surface 202 and the third surface 302 can be smooth surfaces, and the textured surface here can be understood as a stone-like texture or a brick-like texture, making the appearance of the capping beam of the retaining structure flat and beautiful, and the texture can be set according to requirements to meet the landscape requirements.

[0082] Among them, with Figure 1 the relative positions therein for description, Figure 1 the up-down, left-right, front-back directions shown in Figure 1 can be understood as the relative positions in

[0083] or the relevant positional relationships when the product is placed conventionally. Figure 1 Among them, the first precast concrete slab 200 and the second precast concrete slab 300 are arranged on the left and right sides of the capping beam concrete layer 400. The widths of the first precast concrete slab 200 and the second precast concrete slab 300 are equal to the length of the capping beam concrete layer 400 in the up-down direction. Here, the widths of the first precast concrete slab 200 and the second precast concrete slab 300 can be understood as

[0084] Please refer to Figure 9, meanwhile, the first precast concrete slab 200 includes a plurality of third slab bodies 220 spliced in sequence, and the splicing surfaces of adjacent third slab bodies 220 are of socket and spigot 221 structure. The second precast concrete slab 300 includes a plurality of fourth slab bodies spliced in sequence, and the splicing surfaces of adjacent fourth slab bodies are also of socket and spigot 221 structure to facilitate splicing.

[0085] That is to say, in this embodiment, the first precast concrete slab 200 and the second precast concrete slab 300 can be understood as the side formwork of the capping beam.

[0086] Of course, there are curved parts in the extending direction of some revetments. To facilitate the first precast concrete slab 200 and the second precast concrete slab 300 to be bent accordingly, please refer to Figure 8 , in other embodiments, the first precast concrete slab 200 includes a plurality of first slab bodies 210 spliced in sequence, and the splicing surfaces of at least two adjacent first slab bodies 210 are inclined surfaces 211. For example, the splicing surfaces of two adjacent first slab bodies 210 are inclined surfaces 211, or the splicing surfaces of three adjacent first slab bodies 210 are inclined surfaces 211, so that adjacent first slab bodies 210 are spliced at an angle, and thus partial regions of the first precast concrete slab 200 can be bent.

[0087] Meanwhile, the second precast concrete slab 300 includes a plurality of second slab bodies spliced in sequence, and the splicing surfaces of at least two adjacent second slab bodies are inclined surfaces 211. For example, the splicing surfaces of two adjacent second slab bodies are inclined surfaces 211, or the splicing surfaces of three adjacent second slab bodies are inclined surfaces 211, so that adjacent second slab bodies are spliced at an angle, and thus partial regions of the second precast concrete slab 300 can be bent.

[0088] Specifically, the corresponding region of the first precast concrete slab 200 located at the curved part of the revetment is bent. Meanwhile, partial regions of the second precast concrete slab 300 opposite to the bent region of the first precast concrete slab 200 are also bent, and their bending directions are the same. Therefore, the capping beam concrete layer 400 can also be bent. It can be seen that the capping beam of the retaining structure provided in this embodiment has good versatility and can be applied to revetments with curved regions.

[0089] Please refer to again Figure 3 , to facilitate the connection of the first precast concrete slab 200 and the second precast concrete slab 300 to form a relatively stable structure, the first precast concrete slab 200 is connected with a first stirrup 201, and the second precast concrete slab 300 is connected with a second stirrup 301. One end of the first stirrup 201 far from the first precast concrete slab 200 and one end of the second stirrup 301 far from the second precast concrete slab 300 are fixedly connected by welding.

[0090] In addition, longitudinal main reinforcements 80 and third stirrups 90 are provided in both the first precast concrete slab 200 and the second precast concrete slab 300. The longitudinal main reinforcements 80 and the third stirrups 90 are connected. The third stirrups are straight steel bars. Among them, the third stirrups 90 in the first precast concrete slab 200 and the first stirrups 201 are distributed at intervals. The first stirrups 201 are also connected to the longitudinal main reinforcements 80 in the first precast concrete slab 200. The third stirrups 90 in the second precast concrete slab 300 and the second stirrups 301 are distributed at intervals. The second stirrups 301 are also connected to the longitudinal main reinforcements 80 in the second precast concrete slab 300. In this embodiment, both the first stirrups 201 and the second stirrups 301 are U-shaped structures.

[0091] That is to say, the first stirrups 201 and the second stirrups 301 extend from the roughened surface of the first precast concrete slab 200 and the roughened surface of the second precast concrete slab 300 respectively.

[0092] At the same time, a plurality of longitudinal construction reinforcements 10 are provided in the capping beam concrete layer 400. The longitudinal construction reinforcements 10 are connected to the adjacent first stirrups 201 or second stirrups 301. That is to say, the longitudinal construction reinforcements 10 are connected to the first stirrups 201 or the second stirrups 301 of the adjacent longitudinal construction reinforcements 10.

[0093] Specifically, in this embodiment, some of the longitudinal construction reinforcements 10 are connected to the first stirrups 201, and the rest of the longitudinal construction reinforcements 10 are connected to the second stirrups 301.

[0094] In this embodiment, a construction method for the retaining structure is also provided, which can realize the construction of the retaining structure. Specifically, the construction method includes: the support structure can be first installed on the retaining pile 100, and then the first precast concrete slab 200 and the second precast concrete slab 300 are arranged on the support structure. After that, concrete is poured between the first precast concrete slab 200 and the second precast concrete slab 300 to form the capping beam concrete layer 400. After reaching the form removal strength, the support structure is disassembled.

[0095] Among them, the support structure 700 includes a bottom form 710, a first support 720, a second support 730, a first stop block 740, and a second stop block 750.

[0096] Specifically, the steps of installing the support structure on the retaining pile include: fixing both the first support 720 and the second support 730 on the retaining pile 100, setting the bottom form on both the first support 720 and the second support 730 at the same time. At the same time, fixing the first stop block 740 at the end of the first support 720, and fixing the second stop block 750 at the end of the second support 730. Among them, the first stop block 740 is used to limit the bottom form and the first precast concrete slab, and the second stop block 750 is used to limit the bottom form and the second precast concrete slab.

[0097] The steps of setting the first precast concrete slab 200 and the second precast concrete slab 300 on the support structure include: connecting the first precast concrete slab 200 and the second precast concrete slab 300 together to form a side form for the capping beam; hoisting the side form for the capping beam onto the support structure, that is, hoisting the side form for the capping beam onto the bottom form 710.

[0098] In addition, a first connecting sleeve 760, a second connecting sleeve 770, a first longitudinal limiting steel bar 780 for the sleeve, and a second longitudinal limiting steel bar 790 for the sleeve are provided in the retaining pile.

[0099] One end of the first longitudinal limiting steel bar 780 for the sleeve is connected to the end plate of the retaining pile, and the other end is connected to the first connecting sleeve 760. One end of the second longitudinal limiting steel bar 790 for the sleeve is connected to the end plate of the retaining pile, and the other end is connected to the second connecting sleeve 770. The first connecting sleeve 760 and the second connecting sleeve 770 are arranged along the radial direction of the retaining pile.

[0100] The steps of installing the support structure on the retaining pile further include:

[0101] At the positions of the first connecting sleeve 760 and the second connecting sleeve 770 on the retaining pile 100, a first steel plate 1000 and a second steel plate 2000 are provided. The first steel plate 1000 and the second steel plate 2000 are respectively connected to the first support 720 and the second support 730. A first fixing member passes through the first waist-shaped hole 1001 of the first steel plate 1000 and is connected to the first connecting sleeve 760 to fasten the first support 720 and the retaining pile. A second fixing member passes through the second waist-shaped hole of the second steel plate 2000 and is connected to the second connecting sleeve 770 to fasten the second support 730 and the retaining pile 100.

[0102] Please refer to Figure 5 , that is to say, the first steel plate 1000 and the second steel plate 2000 are respectively provided with a first waist-shaped hole 1001 and a second waist-shaped hole. The setting of the first waist-shaped hole 1001 and the second waist-shaped hole improves the error tolerance rate, can eliminate the driving error of the precast sheet pile, and meets the elevation leveling requirements.

[0103] It can be seen that the support structure 700 can realize the supporting effect on the first precast concrete slab 200 and the second precast concrete slab 300.

[0104] Specifically, both the first support 720 and the second support 730 are steel plates, and both the first stop block 740 and the second stop block 750 are made of section steel. Among them, in order to facilitate fixing the first support 720 and the second support 730 on both sides of the retaining pile 100, both sides of the retaining pile 100 here can be understood as the soil-facing side and the water-facing side of the retaining pile 100.

[0105] Both the first fixing member 701 and the second fixing member 702 are bolts, and the first connecting sleeve 760 and the second connecting sleeve 770 are arranged on the retaining pile 100.

[0106] In addition, please refer to Figure 4 , in other embodiments, in order to facilitate the disassembly of the first fixing member 701 and the second fixing member 702, the first fixing member 701 and the second fixing member 702 can be selected as longer bolts. In this way, the first fixing member 701 can directly penetrate the first bracket 720 in the left-right direction, and the second fixing member 702 can directly penetrate the second bracket 730 in the left-right direction, which is convenient for subsequent removal of the first fixing member 701 and the second fixing member 702 outside the first bracket 720 and the second bracket 730.

[0107] Please refer to Figure 6 and Figure 7 and in combination with Figure 1 , it should be noted that in order to facilitate the connection between the first sleeve longitudinal limiting steel bar 780 and the first connecting sleeve 760, and the connection between the second sleeve longitudinal limiting steel bar 790 and the second connecting sleeve 770.

[0108] Connection holes 761 are provided on both the first connecting sleeve 760 and the second connecting sleeve 770. One end of the first sleeve longitudinal limiting steel bar 780 penetrates the connection hole 761 of the first connecting sleeve 760 and is welded and fixed to the first connecting sleeve 760, and the other end of the first sleeve longitudinal limiting steel bar 780 is threadedly connected or welded and fixed to the end plate of the retaining pile 100. At the same time, one end of the second sleeve longitudinal limiting steel bar 790 penetrates the connection hole 761 of the second connecting sleeve 770 and is welded and fixed to the second connecting sleeve 770, and the other end of the second sleeve longitudinal limiting steel bar 790 is threadedly connected or welded and fixed to the end plate of the retaining pile 100.

[0109] In addition, in order to further limit the first connecting sleeve 760 and the second connecting sleeve 770, a first sleeve transverse limiting steel bar 703 is welded and fixed on the first connecting sleeve 760, and the first sleeve transverse limiting steel bar 703 is fixed to the steel reinforcement cage of the retaining pile 100. A second sleeve transverse limiting steel bar is welded and fixed on the second connecting sleeve 770, and the second sleeve transverse limiting steel bar is fixed to the steel reinforcement cage of the retaining pile 100.

[0110] After the first connecting sleeve 760 and the second connecting sleeve 770 are fixed, the retaining pile 100 is manufactured according to the production process of the precast pile.

[0111] Please refer to Figure 10 and Figure 11, of course, in other embodiments, the retaining pile 100 may also not have the first connecting sleeve 760 and the second connecting sleeve 770. By respectively arranging a reserved hole 101 on both sides of the retaining pile 100, and arranging the first wooden square 30 and the second wooden square 40 on both sides of the retaining pile 100, a screw rod sequentially penetrates through the first support 720 and the first wooden square 30 on the left side, the two reserved holes 101 of the retaining pile 100, and the second wooden square 40 and the second support 730 on the right side, and then nuts are tightened at both ends of the screw rod to fix the first support 720 and the second support 730 at the upper end of the retaining pile 100.

[0112] In addition, it should be noted that, in this embodiment, in order to facilitate the connection between the retaining pile 100 and the capping beam concrete layer 400 of the capping beam, the retaining pile 100 is connected with anchor bars or a steel reinforcement cage is arranged inside the retaining pile, and the anchor bars or the steel reinforcement cage extend into the capping beam concrete layer 400.

[0113] Specifically, the retaining pile 100 is a hollow pile, the retaining pile 100 is provided with an installation groove 102, concrete is poured in the installation groove 102, a supporting plate 110 is arranged in the installation groove 102, the supporting plate 110 is connected with a steel reinforcement cage, a part of the structure of the steel reinforcement cage is located in the installation groove 102, and the rest of the structure of the steel reinforcement cage extends into the capping beam concrete layer 400.

[0114] It should be noted that the steel reinforcement cage is composed of inserted bars 121 and spiral stirrups 122. After the supporting plate 110 and the steel reinforcement cage are installed in the installation groove 102 of the retaining pile 100, concrete is poured into the installation groove 102.

[0115] Of course, in other embodiments, the retaining pile 100 may also be a non-hollow pile. The end plate of this retaining pile 100 is welded and fixed to the anchor reinforcement, and at the same time, the anchor reinforcement extends into the concrete layer of the capping beam.

[0116] Specifically, the construction method steps of the retaining structure include, first, a support structure 700 needs to be installed on the retaining pile 100, that is, the first support 720 and the second support 730 are fixed on the retaining pile 100 through the first fixing member 701 and the second fixing member 702. Then, a bottom form 710 is laid on the first support 720 and the second support 730. At the same time, the gap between the bottom form 710 and the pile body of the retaining pile 100 can be filled with materials such as concrete and foam rubber first.

[0117] Meanwhile, anchor bars are connected to the retaining pile 100, or a steel reinforcement cage is placed inside the retaining pile 100 and concrete is poured into the installation groove 102.

[0118] Specifically, a supporting plate 110 is installed in the installation groove 102 of the retaining pile 100, a steel reinforcement cage is placed, and then concrete is poured into the installation groove 102.

[0119] Meanwhile, the capping beam can be fabricated: Using the first precast concrete slab and the second precast concrete slab as the side formwork of the capping beam, hoist the side formwork of the capping beam to the support structure, configure longitudinal structural reinforcement, and pour concrete between the first precast concrete slab and the second precast concrete slab to form the capping beam concrete layer.

[0120] Specifically, first connect the first stirrups of the first precast concrete slab and the second stirrups of the second precast concrete slab together, hoist the connected first precast concrete slab and the second precast concrete slab above the retaining piles, then configure longitudinal structural reinforcement, and finally pour concrete to form the capping beam.

[0121] That is to say, connect the first precast concrete slab 200 and the second precast concrete slab 300 together to form the side formwork of the capping beam, apply release agent on the surface of the bottom formwork 710 that contacts the concrete, and hoist the side formwork of the capping beam into position.

[0122] Meanwhile, tie the longitudinal structural reinforcement 10, the first stirrups 201, and the second stirrups 301 with binding wire. Before pouring, it is also necessary to check and seal the gaps between the adjacent plates (the third plate and the fourth plate mentioned above) of the first precast concrete slab 200 and the second precast concrete slab 300, pour the concrete of the capping beam, finish the top surface, and form the capping beam concrete layer 400. Finally, after reaching the form removal strength, remove the first fixing member 701 and the second fixing member 702, remove the first support 720 and the second support 730, and at the same time, also remove the bottom formwork 710, thus completing the construction of the capping beam. Since there is no need to remove the first precast concrete slab 200 and the second precast concrete slab 300, the construction difficulty of the capping beam is reduced, the operation efficiency is improved, the cost is reduced, and the safety hazard is reduced.

[0123] It should be noted that the thickness of the first precast concrete slab 200 and the second precast concrete slab 300 also needs to meet the requirements of form removal and hoisting.

[0124] Embodiment 2

[0125] Please refer to Figures 12-14 , in this application, a retaining structure is also provided. Different from the first precast concrete slab 200 and the second precast concrete slab 300 in Embodiment 1, in this embodiment, the cross-section of the first precast concrete slab 200 is L-shaped, and the cross-section of the second precast concrete slab 300 is also L-shaped.

[0126] There are no connecting steel bars in the first precast concrete slab 200 and the second precast concrete slab 300, and the thicknesses of the first precast concrete slab 200 and the second precast concrete slab 300 are thinner than those of the first precast concrete slab 200 and the second precast concrete slab 300 in the first embodiment. Fiber concrete or concrete with a strength grade above C40 can be used for production.

[0127] It should be noted that for matters not mentioned in this embodiment, reference can be made to the first embodiment.

[0128] The first precast concrete slab 200 includes a first concrete slab and a second concrete slab connected vertically. Among them, the second concrete slab is used to abut against the bottom formwork 710 (such as plywood). In this way, the stability of the second precast concrete slab 300 and the first precast concrete slab 200 during installation is better. The first concrete slab extends upward from the connection between the first concrete slab and the second concrete slab, and the second concrete slab extends to the right from the connection between the first concrete slab and the second concrete slab. The structures of the second precast concrete slab 300 and the first precast concrete slab 200 are the same.

[0129] Specifically, the construction method steps of the retaining structure include: First, install the first bracket 720 and the second bracket 730 of the bracket structure 700. At the same time, arrange the bottom formwork 710, install the support plate 110 in the installation groove 102 of the retaining pile 100, place the steel reinforcement cage, and then carry out the concrete pouring in the installation groove 102. After the concrete has finally set, place the capping beam steel reinforcement cage 50 on the second precast concrete slab 300 and the first precast concrete slab 200. The capping beam steel reinforcement cage 50 is composed of capping beam stirrups 51, longitudinal structural reinforcement bars 52, and longitudinal stressed bars 53.

[0130] Among them, the bracket structure 700 in this embodiment is the same as the bracket structure 700 provided in the first embodiment, and reference can be made to the installation method of the above-mentioned bracket structure 700.

[0131] Among them, the capping beam manufacturing steps include: After the first precast concrete slab and the second precast concrete slab are hoisted and positioned, the through bolts sequentially pass through the first wooden pad, the first precast concrete slab, the second precast concrete slab, and the second wooden pad. Both the first precast concrete slab and the second precast concrete slab are L-shaped.

[0132] Specifically, the first wooden pad 500 and the second wooden pad 600 are respectively arranged on the left side of the first precast concrete slab and the right side of the second precast concrete slab 300. The number of through bolts 20 is multiple. Some of the through bolts 20 sequentially penetrate the first wooden pad 500, the precast slab reserved hole 204 of the first precast concrete slab 200, the capping beam concrete layer 400, the precast slab reserved hole 204 of the second precast concrete slab 300, and the through bolt 20, and then are fastened at both ends of the through bolt 20 with nuts.

[0133] Another part of the through bolt 20 is higher. This other part of the through bolt 20 sequentially penetrates through the first cushion wood board 500, the first precast concrete slab 200, the second precast concrete slab 300, and the through bolt 20, and then is fastened at both ends of the through bolt 20 by nuts.

[0134] It should be noted that gaskets 70 are provided between the nuts and the first cushion wood board 500, and gaskets 70 are also provided between the nuts and the second cushion wood board 600.

[0135] Specifically, the second precast concrete slab 300 and the first precast concrete slab 200 are hoisted in place, and the first precast concrete slab 200, the second precast concrete slab 300, the first cushion wood board 500, and the second cushion wood board 600 are fastened by through nuts. Among them, part of the through bolts 20 will pass through the reserved holes 101 of the first precast concrete slab 200 and the reserved holes 101 of the second precast concrete slab 300, and the nuts on both sides are tightened.

[0136] It should be noted that in order to avoid opening holes in the first cushion wood board 500 and the second cushion wood board 600, both the first cushion wood board 500 and the second cushion wood board 600 can be composed of multiple wood blocks arranged in sequence. The through bolt 20 can pass through the space between adjacent wood blocks. When the nuts are tightened, to prevent over-tightening from causing the second precast concrete slab 300 and the first precast concrete slab 200 to tilt and deform, steel bar supports can be arranged inside the capping beam, that is, place steel bars and support them between the first cushion wood board 500 and the second cushion wood board 600. Finally, the concrete of the capping beam main body is poured, the top surface is finished. After reaching the form removal strength, first remove the through bolts 20, and then remove the first support 720, the second support 730, and the bottom form 710 to complete the construction of the capping beam.

[0137] Embodiment 3

[0138] Please refer to Figure 15 and Figure 16 In this application, a retaining structure is also provided. The structures of the first precast concrete slab 200 and the second precast concrete slab 300 are the same as those in Embodiment 1, and the first precast concrete slab 200 and the second precast concrete slab 300 are also connected by stirrups (the first stirrup and the second stirrup mentioned above).

[0139] In addition, the retaining structure includes a first wooden square cushion block 61, a first backing plate 62, a second backing plate 63, a second wooden square cushion block 64, and a support beam 65. The fixing rod 66 sequentially passes through the first backing plate 62, the first wooden square cushion block 61, the first precast concrete slab 200, the support beam 65, the second precast concrete slab 300, the second wooden square cushion block 64, and the second backing plate 63. The fixing rod 66 is the through bolt 20, and then nuts are screwed on both ends of the through bolt 20.

[0140] It should be noted that for the parts not mentioned in this embodiment, reference may be made to Embodiment 1 and Embodiment 2.

[0141] For some retaining piles 100, when the pile tops of the retaining piles 100 are relatively flat after pile driving, the support structure 700 in Embodiment 1 or Embodiment 2 may not be provided.

[0142] Therefore, in this embodiment, a construction method of a retaining structure is further provided, and the construction method includes:

[0143] Connecting anchor bars to the retaining piles or placing steel cages in the retaining piles and pouring concrete.

[0144] The through bolts (i.e., fixing rods 66) sequentially pass through the first cushion block, the first precast concrete slab, the support beam, the second precast concrete slab, and the second cushion block; the first stirrup of the first precast concrete slab and the second stirrup of the second precast concrete slab are connected together, and the connected first precast concrete slab and second precast concrete slab are hoisted above the retaining pile.

[0145] Wherein, the first cushion block includes a first wooden square cushion block 61 and a first backing plate 62, and the second cushion block includes a second backing plate 63 and a second wooden square cushion block 64.

[0146] That is to say, the fixing rod 66 sequentially passes through the first backing plate 62, the first wooden square cushion block 61, the first precast concrete slab, the support beam, the second precast concrete slab, the second wooden square cushion block 64, and the second backing plate 63.

[0147] Meanwhile, the bottom formwork 710, the first fixing clip 800 and the second fixing clip 900 are installed. Among them, the first fixing clip 800 is connected to the first precast concrete slab 200, the lower side of the first fixing clip 800 abuts against the retaining pile 100, the bottom formwork 710 is clamped between the first precast concrete slab 200 and the lower end of the first fixing clip 800, and the side of the bottom formwork 710 abuts against the retaining pile 100; the second fixing clip 900 is connected to the second precast concrete slab 300, the lower side of the second fixing clip 900 abuts against the retaining pile 100, and the bottom formwork 710 is clamped between the second precast concrete slab 300 and the lower end of the second fixing clip 900.

[0148] Install longitudinal construction bars, pour the concrete of the beam cap, and remove the formwork after reaching the formwork removal strength.

[0149] Wherein, the support structure includes a bottom formwork, through bolts, a first fixing clip and a second fixing clip, and among them, the first fixing clip and the second fixing clip are in a C-shaped structure or an F-shaped structure.

[0150] Specifically, both the first fixing clip 800 and the second fixing clip 900 are in an inverted F shape. The bottom die 710 can be arranged on the first fixing clip 800 and the second fixing clip 900, carried by the first fixing clip 800 and the second fixing clip 900, and then the bottom die 710 carries the first precast concrete slab 200 and the second precast concrete slab 300.

[0151] That is to say, after the concrete pouring of the installation groove 102 of the retaining pile 100, the installation of the supporting plate 110 and the installation of the steel reinforcement cage are completed, the first precast concrete slab 200 and the second precast concrete slab 300 are arranged at intervals, the reserved holes 101 of the supporting beam 65 are aligned with the reserved holes 101 of the first precast concrete slab 200 and the second precast concrete slab 300. After the fixing rod 66 passes through the supporting beam 65, the first precast concrete slab 200 and the second precast concrete slab 300, the first wooden block 61, the first backing plate 62, the second backing plate 63, and the second wooden block 64 are continued to be put on, and bolts are tightened at both ends of the fixing rod 66.

[0152] Then, the stirrups of the first precast concrete slab 200 and the second precast concrete slab 300 are welded one by one to form an integral body as the formwork for the cast-in-place capping beam. Among them, the longitudinal structural bars 10 at the bottom pass through the reserved holes 101 of the supporting beam 65. The whole is hoisted to the top of the retaining pile 100. After proper leveling, the first fixing clip 800 and the second fixing clip 900 are installed. The bottom die 710 is clamped with the first precast concrete slab 200 and the second precast concrete slab 300 through the first fixing clip 800 and the second fixing clip 900. Then, the upper longitudinal structural bars 10 are installed, and concrete is poured. Finally, the first fixing clip 800 and the second fixing clip 900, the through bolts, and the bottom die 710 are removed to complete the construction of the capping beam.

[0153] To sum up, the retaining structure includes the retaining pile 100 and the first precast concrete slab 200 and the second precast concrete slab 300 arranged at intervals. And a capping beam concrete layer 400 is provided between the first precast concrete slab 200 and the second precast concrete slab 300. Both the first precast concrete slab 200 and the second precast concrete slab 300 are installed at the top of the retaining pile 100.

[0154] Among them, the capping beam concrete layer 400, the first precast concrete slab 200, and the second precast concrete slab 300 jointly form the capping beam. And the retaining pile 100 is connected to the capping beam concrete layer 400 of the capping beam. By setting the first precast concrete slab 200 and the second precast concrete slab 300 on the retaining pile 100, the method of using on-site formwork and then pouring concrete to make the capping beam is replaced, and there is no need to remove the first precast concrete slab 200 and the second precast concrete slab 300, reducing the construction difficulty of the capping beam, improving the operation efficiency, reducing the cost, and reducing the potential safety hazards.

[0155] It can be seen that in this embodiment, the retaining structure provided uses precast concrete slabs as the formwork for casting the capping beam, that is, the precast concrete slabs are used as formwork during construction and become part of the capping beam after the cast-in-place concrete is completed.

[0156] Using precast concrete slabs instead of the formwork on the side of the cast-in-place capping beam simplifies formwork installation and eliminates the need for supports, enabling the cast-in-place capping beam to be formwork-free, with a flat and beautiful appearance. Moreover, textures can be set according to customized requirements to meet the landscape requirements. Additionally, the precast slab-type side formwork is lighter in self-weight, simpler in formwork, more versatile, and can adapt to the turns of the revetment compared to the integrally precast capping beam structure.

[0157] In addition, a support structure 700 is provided with kidney-shaped holes, which has a high error tolerance, can eliminate the driving error of the precast sheet piles, and meet the requirements of elevation leveling. The precast concrete slab is placed on the bottom formwork 710, which can not only fix the position of the bottom formwork 710 but also facilitate the adjustment of the bottom formwork 710 to fit the pile body of the retaining pile 100.

[0158] In addition, for example, the first stirrup 201 and the second stirrup 301 in Embodiment 1 extend out of the roughened surface and are welded and fixed, which realizes the connection and fixation of the first precast concrete slab 200 and the second precast concrete slab 300, can replace the tensioning device, and no longer requires the setting of the through bolts 20.

[0159] The first connecting sleeve 760 and the second connecting sleeve 770 are embedded in the retaining pile 100. Through the transverse limiting steel bars of the sleeve and the longitudinal limiting steel bars of the sleeve, it can be ensured that the positions of the first connecting sleeve 760 and the second connecting sleeve 770 do not deviate during the production process. At the same time, the length of the fixed longitudinal limiting steel bars of the sleeve can also ensure the positions of the first connecting sleeve 760 and the second connecting sleeve 770 from the end plate, simplifying the positioning difficulty of workers during production.

[0160] The above is only the specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any changes or substitutions that can be easily thought of by those skilled in the art within the technical scope disclosed by the present invention should be covered by the protection scope of the present invention. Therefore, the protection scope of the present invention should be subject to the protection scope of the claims.

Claims

1. A retaining structure, characterized in that, Comprising: Supporting piles; And The first precast concrete slab and the second precast concrete slab which are oppositely arranged, and a capping beam concrete layer is provided between the first precast concrete slab and the second precast concrete slab, and both the first precast concrete slab and the second precast concrete slab are installed on the top of the supporting piles; Wherein, the capping beam concrete layer, the first precast concrete slab and the second precast concrete slab jointly form a capping beam; The supporting piles are connected to the capping beam concrete layer of the capping beam; The supporting piles are provided with a first connecting sleeve, a second connecting sleeve, a first sleeve longitudinal limiting steel bar and a second sleeve longitudinal limiting steel bar. One end of the first sleeve longitudinal limiting steel bar is connected to the end plate of the supporting pile, and the other end is connected to the first connecting sleeve. One end of the second sleeve longitudinal limiting steel bar is connected to the end plate of the supporting pile, and the other end is connected to the second connecting sleeve. The first connecting sleeve and the second connecting sleeve are arranged along the radial direction of the supporting pile; Using the first precast concrete slab and the second precast concrete slab as the side formwork of the capping beam, and hoisting the side formwork of the capping beam to the support structure; The support structure includes a bottom formwork, a first support and a second support. A first steel plate and a second steel plate are provided at the positions of the first connecting sleeve and the second connecting sleeve of the supporting pile, and the first steel plate and the second steel plate are respectively connected to the first support and the second support.

2. The retaining structure according to claim 1, wherein, The capping beam concrete layer is provided with a plurality of longitudinal structural steel bars. The first precast concrete slab is connected with a first stirrup, and the second precast concrete slab is connected with a second stirrup. One end of the first stirrup away from the first precast concrete slab and one end of the second stirrup away from the second precast concrete slab are fixedly connected; the longitudinal structural steel bar is connected to the adjacent first stirrup or the second stirrup.

3. The retaining structure according to claim 1, characterized in that, The cross section of the first precast concrete slab is L-shaped, and the cross section of the second precast concrete slab is L-shaped.

4. The retaining structure according to claim 1, characterized in that, The first precast concrete slab and the second precast concrete slab are made of fiber concrete or concrete with a strength grade above C40.

5. The retaining structure according to claim 1, characterized in that, The first precast concrete slab has a first surface and a second surface which are opposite to each other. The first surface is a smooth surface or a textured surface, and the second surface is a roughened surface, and the second surface is used for contacting the capping beam concrete layer; Moreover, the second precast concrete slab has a third surface and a fourth surface which are opposite to each other. The third surface is a smooth surface or a textured surface, and the fourth surface is a roughened surface, and the fourth surface is used for contacting the capping beam concrete layer.

6. The retaining structure according to claim 1, characterized in that, The first precast concrete slab includes a plurality of first plate bodies spliced in sequence. The splicing surfaces of at least two adjacent first plate bodies are inclined surfaces, so that the adjacent first plate bodies are spliced at an angle; the second precast concrete slab includes a plurality of second plate bodies spliced in sequence. The splicing surfaces of at least two adjacent second plate bodies are inclined surfaces, so that the adjacent second plate bodies are spliced at an angle.

7. The retaining structure according to claim 1, characterized in that, The first precast concrete slab includes a plurality of third plate bodies spliced in sequence. The splicing surfaces of the adjacent third plate bodies are in a socket and spigot structure. The second precast concrete slab includes a plurality of fourth plate bodies spliced in sequence. The splicing surfaces of the adjacent fourth plate bodies are in a socket and spigot structure.

8. The retaining structure according to claim 1, wherein The retaining pile is connected with anchor bars or a steel reinforcement cage is arranged inside the retaining pile, and the anchor bars or the steel reinforcement cage extend into the concrete layer of the capping beam.

9. A construction method of a retaining structure, characterized in that, Applying the retaining structure according to claim 1, the construction method includes: Installing a support structure on the retaining pile; Connecting anchor reinforcement bars to the retaining pile or placing a steel reinforcement cage inside the retaining pile and pouring concrete; Fabricating the capping beam: Using the first precast concrete slab and the second precast concrete slab as the side formwork of the capping beam, hoisting the side formwork of the capping beam to the support structure, configuring longitudinal structural bars, and pouring concrete between the first precast concrete slab and the second precast concrete slab to form the concrete layer of the capping beam; removing the support structure after reaching the formwork removal strength; The support structure includes a bottom formwork, a first support, and a second support. The step of installing the support structure on the retaining pile includes: Fixing both the first support and the second support on the retaining pile; Simultaneously arranging the bottom formwork on the first support and the second support; At the positions of the first connecting sleeve and the second connecting sleeve of the retaining pile, there are a first steel plate and a second steel plate. The first steel plate and the second steel plate are respectively connected to the first support and the second support. Pass the first fixing member through the first waist-shaped hole of the first steel plate and connect it to the first connecting sleeve to fasten the first support and the retaining pile; Pass the second fixing member through the second waist-shaped hole of the second steel plate and connect it to the second connecting sleeve to fasten the second support and the retaining pile.

10. The construction method of the retaining structure according to claim 9, characterized in that, The step of installing the support structure on the retaining pile further includes: Fixing a first stop block at the end of the first support and a second stop block at the end of the second support; Wherein, the support structure further includes a first stop block and a second stop block. The first stop block is used to limit the bottom formwork and the first precast concrete slab, and the second stop block is used to limit the bottom formwork and the second precast concrete slab.

11. The construction method of the retaining structure according to claim 9, characterized in that, The step of fabricating the capping beam includes pre-connecting the first stirrups of the first precast concrete slab and the second stirrups of the second precast concrete slab together, hoisting the connected first precast concrete slab and the second precast concrete slab above the retaining pile, then configuring longitudinal structural bars, and finally pouring concrete to form the capping beam.

12. The construction method of the retaining structure according to claim 9, characterized in that, In the step of fabricating the capping beam, after the first precast concrete slab and the second precast concrete slab are hoisted in place, the through bolts sequentially pass through the first cushion wood board, the first precast concrete slab, the second precast concrete slab, and the second cushion wood board; wherein both the first precast concrete slab and the second precast concrete slab are L-shaped.

13. A construction method of a retaining structure, applying a retaining structure, the retaining structure includes: Retaining piles; And The first precast concrete slab and the second precast concrete slab arranged oppositely, and there is a concrete layer of the capping beam between the first precast concrete slab and the second precast concrete slab. The first precast concrete slab and the second precast concrete slab are both installed on the top of the retaining pile; Wherein, the concrete layer of the capping beam, the first precast concrete slab and the second precast concrete slab jointly form the capping beam; The retaining pile is connected to the concrete layer of the capping beam of the capping beam; Characterized in that the construction method includes: Connecting anchor reinforcement bars to the retaining pile or placing a steel reinforcement cage inside the retaining pile and pouring concrete; The through bolts sequentially pass through the first cushion block, the first precast concrete slab, the support beam, the second precast concrete slab, and the second cushion block; the first stirrup of the first precast concrete slab and the second stirrup of the second precast concrete slab are connected together, and the connected first precast concrete slab and the second precast concrete slab are hoisted above the retaining pile; Meanwhile, the bottom formwork, the first fixing clamp and the second fixing clamp are installed. Among them, the first fixing clamp is connected to the first precast concrete slab, so that the lower side of the first fixing clamp abuts against the retaining pile, and the bottom formwork is clamped between the first precast concrete slab and the lower end of the first fixing clamp, and the side of the bottom formwork abuts against the retaining pile; the second fixing clamp is connected to the second precast concrete slab, so that the lower side of the second fixing clamp abuts against the retaining pile, and the bottom formwork is clamped between the second precast concrete slab and the lower end of the second fixing clamp; The longitudinal structural steel bars are installed, and the concrete of the beam cap is poured; After reaching the form removal strength, the support structure is removed; Among them, the support structure includes a bottom formwork, through bolts, a first fixing clamp and a second fixing clamp. Among them, the first fixing clamp and the second fixing clamp are in a C-shaped structure or an F-shaped structure.

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