An assembled laminated support system with mortise and tenon joints and a construction method thereof

Abstract

The application discloses a kind of assembly stacked beam type retaining system with mortise and tenon joint and its construction method, including main building and retaining wall, precast stacked beam is installed between main building and retaining wall;Precast stacked beam includes a precast beam A with base, several precast beams B and a precast beam C, several precast beams B are sequentially installed on precast beam A by mortise and tenon connection, precast beam C is installed on the topmost precast beam B by mortise and tenon connection, precast beam A, precast beam B and precast beam C both ends are respectively hinged with main building and retaining wall, the application makes full use of main building, retaining wall as two supports, and converts soil water thrust into horizontal stress direction, avoids the problem that vertical independent cantilever retaining wall is easy to lose stability with large internal force, and by setting precast beam A with base, precast stacked beam self-weight is supported, foundation is independent, and the mutual influence of main building and retaining wall settlement and sliding is avoided.

Description

Technical Field

[0001] This invention relates to the field of structural building technology, specifically to an assembled stacked beam support system with mortise and tenon joints and its construction method. Background Technology

[0002] In the design of retaining walls for basements of buildings, the design of the retaining end structures is a major challenge, involving the retaining wall, the main building, the retaining components at both ends, and their respective foundations. Three common design schemes are: independent cantilever retaining walls (…). Figure 1 As shown), its disadvantages are: the retaining wall has a huge bending moment at the bottom, requiring a large wall thickness, and is prone to instability. It often requires a pile foundation plus a pile cap as a foundation to meet stability design requirements. The applicable retaining height is limited and the cost is high; foundation-integrated retaining wall ( Figure 2 As shown), its disadvantages are: it needs to be designed in conjunction with the main building foundation, which can easily cause settlement and slippage to affect each other, and it is especially unsuitable for high-rise buildings, soft soil, and other similar conditions; both ends are rigidly connected to retaining plates ( Figure 3 As shown in the figure, its disadvantages are as follows: by transferring soil thrust through fixed connections with the main building and retaining wall, the internal forces generated by the fixed connections at both ends have a significant additional effect on the main building and retaining wall, resulting in huge tensile stress and easy damage. Cracks are prone to occur at the junction of the main building and retaining wall ends, leading to difficulties in waterproofing. Therefore, there is an urgent need for a support system that is unaffected by the settlement of the main building and retaining wall and can provide good waterproofing. Summary of the Invention

[0003] The purpose of this invention is to provide an assembled stacked beam support system with mortise and tenon joints and its construction method to solve the above-mentioned technical problems.

[0004] To achieve the above objectives, the present invention provides the following technical solution: an assembled stacked beam retaining system with mortise and tenon joints, comprising a main building and a retaining wall, wherein a prefabricated stacked beam is installed between the main building and the retaining wall;

[0005] The precast stacked beams include a precast beam A with a base, several precast beams B, and a precast beam C. The precast beam A is installed on the ground between the main building and the retaining wall via the base. Several precast beams B are sequentially installed above the precast beam A by means of mortise and tenon joints. The precast beam C is installed above the topmost precast beam B by means of mortise and tenon joints. The two ends of the precast beams A, B, and C are hinged to the main building and the retaining wall, respectively.

[0006] Preferably, the precast stacked beam further includes a capping beam, which is installed above the precast beam C by on-site casting.

[0007] Preferably, the upper surface of the prefabricated beam A and the prefabricated beam B is provided with a U-shaped tenon joint groove, and the lower surface of the prefabricated beam B and the prefabricated beam C is provided with a U-shaped tenon joint that matches the U-shaped tenon joint groove.

[0008] Preferably, the joint part between the prefabricated beam A and the prefabricated beam B and the joint part between the prefabricated beam B and the prefabricated beam C are provided with a layer of rubber-based synthetic polymer coiled material, and the remaining contact positions between the prefabricated beam A and the prefabricated beam B except the joint part and the remaining contact positions between the prefabricated beam B and the prefabricated beam C except the joint part are poured with waterproof mortar.

[0009] Preferably, the connection part of the prefabricated beam A, the prefabricated beam B and the prefabricated beam C with the main building is provided with a waterproof rubber pad.

[0010] Preferably, the connection part of the prefabricated beam A, the prefabricated beam B and the prefabricated beam C with the main building is poured with waterproof mortar.

[0011] Preferably, the soil-water contact surface of the connection part between the prefabricated beam A and the prefabricated beam B and the soil-water contact surface of the connection part between the prefabricated beam B and the prefabricated beam C are coated with a rubber waterproof layer; the soil-water contact surface of the prefabricated beam is coated with a lubricant, and the lubricant is located outside the rubber waterproof layer.

[0012] Preferably, the prefabricated beam A is installed by means of waterproof mortar plus bolt connection with a water-stopping steel sheet.

[0013] A construction method of an assembled laminated beam type support system with mortise and tenon joints, the construction method comprising the following steps:

[0014] S1, installing the prefabricated beam A with a base on the ground between the main building and the retaining wall by means of waterproof mortar plus bolt connection with a water-stopping steel sheet, and hingedly connecting the two ends of the prefabricated beam A with the main building and the retaining wall respectively;

[0015] S2, arranging two layers of rubber-based high molecular coiled material at the U-shaped tenon joint groove of the prefabricated beam A, then aligning and connecting the U-shaped tenon joint of the first prefabricated beam B with the U-shaped tenon joint groove of the prefabricated beam A, hingedly connecting the two ends of the first prefabricated beam B with the main building and the retaining wall respectively, and finally pouring waterproof mortar at other positions between the first prefabricated beam B and the prefabricated beam A except the joint part, to complete the installation of the first prefabricated beam B;

[0016] S3, arranging two layers of rubber-based high molecular coiled material at the U-shaped tenon joint groove of the first prefabricated beam B, then aligning and connecting the U-shaped tenon joint of the second prefabricated beam B with the U-shaped tenon joint groove of the prefabricated beam A, hingedly connecting the two ends of the second prefabricated beam B with the main building and the retaining wall respectively, and finally pouring waterproof mortar at other positions between the second prefabricated beam B and the prefabricated beam A except the joint part, to complete the installation of the second prefabricated beam B;

[0017] S4, repeating step S3 to complete the installation of the last precast beam B;

[0018] S5, two layers of rubber polymer roll materials are arranged at the U-shaped tenon joint groove of the last precast beam B, then the U-shaped tenon joint of the precast beam C is aligned with the U-shaped tenon joint groove of the last precast beam B and connected, and the two ends of the precast beam C are respectively hinged with the main building and the retaining wall, finally waterproof mortar is poured between the precast beam C and the last precast beam B except the joint part, and the installation of the precast beam C is completed;

[0019] S6, the upper surface of the precast beam C is roughened, and a cap beam is poured to form a precast laminated beam;

[0020] S7, the soil-water contact surface at the connection between the precast beam A and the precast beam B, and the soil-water contact surface at the connection between the precast beam B and the precast beam C are coated with a rubber waterproof layer 2-3 times, and the rubber waterproof layer exceeds the connection by more than 300mm upward and downward;

[0021] S8, a lubricant is applied to the soil-water contact surface of the precast laminated beam, and the construction is completed.

[0022] Compared with the prior art, the beneficial effects of the present application are:

[0023] The present application makes full use of the main building and the retaining wall as two supports to convert the soil-water thrust into a horizontal stress direction, avoiding the problem of large internal force and easy instability of the vertical independent cantilever retaining wall; by applying the friction-reducing waterproof coating, the vertical frictional resistance is minimized, the vertical action of the soil thrust is greatly reduced, and the precast beam A with a base is arranged to bear the self-weight of the precast laminated beam, realizing independent foundation and avoiding the mutual influence of the settlement and sliding of the main building and the retaining wall; and by hinging the two end supports of the precast laminated beam, the constraint is released to release the huge pulling stress on the main building and the retaining wall caused by the two end fixed connections; the mortise and tenon connection of the laminated beam plays a self-waterproof function, and finally the friction-reducing waterproof coating is applied to the soil-water contact surface to enhance the waterproof and friction-reducing functions. BRIEF DESCRIPTION OF DRAWINGS

[0024] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the following will briefly introduce the drawings needed to be used in the embodiment description. Obviously, the drawings in the following description are only some embodiments of the present application, and other drawings can also be obtained by those skilled in the art without creative labor.

[0025] Figure 1 It is a structural schematic diagram of an independent cantilever retaining wall in the prior art;

[0026] Figure 2 It is a structural schematic diagram of a foundation combined retaining wall in the prior art;

[0027] Figure 3 Fig. 1 is a structural schematic diagram of a two-end rigid connection retaining plate in the prior art;

[0028] Figure 4 Fig. 2 is a structural schematic diagram of the present application;

[0029] Figure 5 Fig. 3 is a structural schematic diagram of a prefabricated stack beam in the present application;

[0030] Figure 6 Fig. 4 is a structural schematic diagram of a stack beam in the present application; Figure 5 Fig. 5 is a structural schematic diagram of a stack beam in the present application;

[0031] Figure 7 Fig. 6 is a structural schematic diagram of a stack beam in the present application; Figure 6 Fig. 7 is a structural schematic diagram of a stack beam in the present application;

[0032] Figure 8 Fig. 8 is a top view of a connecting structure of two ends of a prefabricated beam in the present application;

[0033] Figure 9 Fig. 9 is a schematic diagram of a construction method of the present application.

[0034] In the drawings, the components represented by the respective reference numerals are listed as follows:

[0035] 1, main building; 2, retaining wall; 3, prefabricated stack beam; 31, prefabricated beam A; 32, prefabricated beam B; 33, prefabricated beam C; 34, coping beam; 35, U-shaped tenon joint groove; 36, U-shaped tenon joint; 37, waterproof rubber pad. DETAILED DESCRIPTION

[0036] The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only some of the embodiments of the present application, but not all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative labor fall within the scope of protection of the present application.

[0037] Please refer to Figures 1-8 The present application provides a technical solution:

[0038] A prefabricated stack beam type supporting system with a mortise and tenon joint, comprising a main building 1 and a retaining wall 2, and a prefabricated stack beam 3 installed between the main building 1 and the retaining wall 2;

[0039] The prefabricated stack beam 3 comprises a prefabricated beam A31 with a base, a plurality of prefabricated beams B32 and a prefabricated beam C33, the prefabricated beam A31 is installed on the ground between the main building 1 and the retaining wall 2 through the base, the plurality of prefabricated beams B32 are installed above the prefabricated beam A31 in turn through the mortise and tenon joint mode, the prefabricated beam C33 is installed above the topmost prefabricated beam B32 through the mortise and tenon joint mode, and the two ends of the prefabricated beam A31, the prefabricated beam B32 and the prefabricated beam C33 are respectively hinged with the main building 1 and the retaining wall 2.

[0040] Specifically, the prefabricated stack beam 3 further comprises a top pressing beam 34, which is installed above the prefabricated beam C33 through the cast-in-place mode.

[0041] Specifically, the upper surfaces of the prefabricated beam A31 and the prefabricated beam B32 are both provided with U-shaped tenon joint grooves 35, and the lower surfaces of the prefabricated beam B32 and the prefabricated beam C33 are both provided with U-shaped tenon joints 36 matched with the U-shaped tenon joint grooves 35.

[0042] Specifically, the joint parts between the prefabricated beam A31 and the prefabricated beam B32 and the joint parts between the prefabricated beam B32 and the prefabricated beam C33 are both provided with two layers of rubber-based synthetic polymer coiled materials, and the remaining contact positions between the prefabricated beam A31 and the prefabricated beam B32 except the joint parts and the remaining contact positions between the prefabricated beam B32 and the prefabricated beam C33 except the joint parts are both cast with waterproof mortar.

[0043] Specifically, the connection parts of the prefabricated beam A31, the prefabricated beam B32 and the prefabricated beam C33 with the main building 1 are all provided with waterproof rubber pads 37.

[0044] As known from the above description, the waterproof rubber pads arranged at the connection parts between the prefabricated beams and the main building can release the influence of internal force on the main building.

[0045] Specifically, the connection parts of the prefabricated beam A31, the prefabricated beam B32 and the prefabricated beam C33 with the main building 1 are all cast with waterproof mortar.

[0046] As known from the above description, the cast waterproof mortar between the prefabricated beams and the retaining wall can achieve the waterproof effect.

[0047] Specifically, the soil-water contact surfaces of the connection parts between the prefabricated beam A31 and the prefabricated beam B32 and the soil-water contact surfaces of the connection parts between the prefabricated beam B32 and the prefabricated beam C33 are both coated with rubber waterproof layers; the soil-water contact surface of the prefabricated stack beam 3 is smeared with lubricant, and the lubricant is located outside the rubber waterproof layer.

[0048] Specifically, the prefabricated beam A31 is installed through the waterproof mortar plus bolt connection with the water-stopping steel sheet.

[0049] As known from the above description, the base of the prefabricated beam A adopts the waterproof mortar to achieve the construction effect of waterproofing and leveling.

[0050] Please refer to Figure 9 The present application provides another technical solution:

[0051] A construction method of an assembled and stacked beam type retaining system with mortise and tenon joints, the construction method comprising the following steps:

[0052] S1, install the prefabricated beam A31 with a base on the ground between the main building 1 and the retaining wall 2 by means of waterproof mortar and bolt connection with a water-stopping steel sheet, and hinge the two ends of the prefabricated beam A31 to the main building 1 and the retaining wall 2 respectively;

[0053] S2, set two layers of rubber-based high polymer coiled material at the U-shaped tenon joint groove 35 of the prefabricated beam A31, then align and connect the U-shaped tenon joint 36 of the first prefabricated beam B32 to the U-shaped tenon joint groove 35 of the prefabricated beam A31, hinge the two ends of the first prefabricated beam B32 to the main building 1 and the retaining wall 2 respectively, and finally pour waterproof mortar between the first prefabricated beam B32 and the prefabricated beam A31 except at the joint part, to complete the installation of the first prefabricated beam B32;

[0054] S3, set two layers of rubber-based high polymer coiled material at the U-shaped tenon joint groove 35 of the first prefabricated beam B32, then align and connect the U-shaped tenon joint 36 of the second prefabricated beam B32 to the U-shaped tenon joint groove 35 of the prefabricated beam A31, hinge the two ends of the second prefabricated beam B32 to the main building 1 and the retaining wall 2 respectively, and finally pour waterproof mortar between the second prefabricated beam B32 and the prefabricated beam A31 except at the joint part, to complete the installation of the second prefabricated beam B32;

[0055] S4, repeat step S3 to complete the installation of the last prefabricated beam B32;

[0056] S5, set two layers of rubber-based high polymer coiled material at the U-shaped tenon joint groove 35 of the last prefabricated beam B32, then align and connect the U-shaped tenon joint 36 of the prefabricated beam C33 to the U-shaped tenon joint groove 35 of the last prefabricated beam B31, hinge the two ends of the prefabricated beam C33 to the main building 1 and the retaining wall 2 respectively, and finally pour waterproof mortar between the prefabricated beam C33 and the last prefabricated beam B32 except at the joint part, to complete the installation of the prefabricated beam C33;

[0057] S6, chisel the upper surface of the prefabricated beam C33, and pour the coping beam 34 to form the prefabricated stacked beam 3;

[0058] S7, the soil-water contact surface at the connection between the prefabricated beam A31 and the prefabricated beam B32, and the soil-water contact surface at the connection between the prefabricated beam B32 and the prefabricated beam C33 are coated with a rubber waterproof layer 2-3 times, and the rubber waterproof layer exceeds the connection by more than 300mm upward and downward;

[0059] S8, smearing lubricant on the soil-water contact surface of the prefabricated stack beam 3, and completing the construction.

[0060] Please refer to Figures 1-9 An embodiment of the present application is as follows (this embodiment takes four prefabricated beams B as an example)

[0061] S1, installing the prefabricated beam A31 with a base on the ground between the main building 1 and the retaining wall 2 by means of waterproof mortar and bolt connection with a water stop steel sheet, and hingedly connecting one end of the prefabricated beam A31 by means of waterproof rubber pad 37 and bolt connection, and first pouring waterproof mortar at the other end of the prefabricated beam A31, and then hingedly connecting the other end by means of bolt connection;

[0062] S2, arranging two layers of rubber-based high polymer coiled material at the U-shaped tenon joint groove 35 of the prefabricated beam A31, then aligning and connecting the U-shaped tenon joint 36 of the first prefabricated beam B32 with the U-shaped tenon joint groove 35 of the prefabricated beam A31, and hingedly connecting the two ends of the first prefabricated beam B32 with the main building 1 and the retaining wall 2 respectively (for reference, the connection of the two ends of the prefabricated beam A31 with the main building 1 and the retaining wall 2 in step S1), and finally pouring waterproof mortar between the first prefabricated beam B32 and the prefabricated beam A31 except at the joint part, to complete the installation of the first prefabricated beam B32;

[0063] S3, arranging two layers of rubber-based high polymer coiled material at the U-shaped tenon joint groove 35 of the first prefabricated beam B32, then aligning and connecting the U-shaped tenon joint 36 of the second prefabricated beam B32 with the U-shaped tenon joint groove 35 of the prefabricated beam A31, and hingedly connecting the two ends of the second prefabricated beam B32 with the main building 1 and the retaining wall 2 respectively (for reference, the connection of the two ends of the prefabricated beam A31 with the main building 1 and the retaining wall 2 in step S1), and finally pouring waterproof mortar between the second prefabricated beam B32 and the prefabricated beam A31 except at the joint part, to complete the installation of the second prefabricated beam B32;

[0064] S4, repeating step S3 to complete the installation of the fourth prefabricated beam B32;

[0065] S5, arranging two layers of rubber-based high polymer coiled material at the U-shaped tenon joint groove 35 of the last prefabricated beam B32, then aligning and connecting the U-shaped tenon joint 36 of the prefabricated beam C33 with the U-shaped tenon joint groove 35 of the last prefabricated beam B31, and hingedly connecting the two ends of the prefabricated beam C33 with the main building 1 and the retaining wall 2 respectively (for reference, the connection of the two ends of the prefabricated beam A31 with the main building 1 and the retaining wall 2 in step S1), and finally pouring waterproof mortar between the prefabricated beam C33 and the last prefabricated beam B32 except at the joint part, to complete the installation of the prefabricated beam C33;

[0066] S6, roughening the upper surface of the prefabricated beam C33, pouring the coping beam 34, and forming the prefabricated stack beam 3;

[0067] S7, the soil-water contact surface at the joint between the precast beam A 31 and the precast beam B 32, and the soil-water contact surface at the joint between the precast beam B 32 and the precast beam C 33 are coated with a rubber waterproof layer 2-3 times, and the upper and lower rubber waterproof layers exceed the joint by more than 300 mm;

[0068] S8, the soil-water contact surface of the precast beam 3 is coated with a lubricant, and the construction is completed.

[0069] The application makes full use of the main building and the retaining wall as two supports, converts the soil-water thrust into a horizontal stress direction, avoids the problem of large internal force and easy instability of the vertical independent cantilever retaining wall, minimizes the vertical frictional resistance by coating the friction-reducing waterproof coating, greatly reduces the vertical action of the soil thrust, realizes independent foundation by setting the precast beam A with a base to bear the weight of the precast beam, avoids the mutual influence of the settlement and sliding of the main building and the retaining wall, releases the constraints by the hinged supports at the two ends of the precast beam, releases the huge pulling stress generated by the two end fixed connections on the main building and the retaining wall, the mortise and tenon connection of the composite beam plays a self-waterproof function, and finally the friction-reducing waterproof coating is applied to the soil-water contact surface, which enhances the waterproof and friction-reducing functions.

[0070] In the description of the application, it should be understood that the terms "coaxial", "bottom", "one end", "top", "middle", "the other end", "upper", "one side", "top", "inner", "front", "central", "both ends" and the like indicate the orientation or positional relationship based on the drawings, and are only for the convenience of describing the application and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation on the application.

[0071] In the application, unless otherwise explicitly specified and limited, the terms "mounting", "setting", "connection", "fixing", "screw connection" and the like should be understood broadly, for example, can be fixed connection, can also be detachable connection, or integrated; can be mechanical connection, can also be electrical connection; can be directly connected, can also be indirectly connected through an intermediate medium, can be the communication between two elements or the interaction relationship between two elements, unless otherwise explicitly limited, the above-mentioned terms in the application can be understood according to the specific meaning of the above-mentioned terms in the application by the person skilled in the art according to the specific situation.

[0072] Although the embodiments of the application have been shown and described, it will be understood by those skilled in the art that modifications can be made to the embodiments without departing from the principles and spirit of the application, and the scope of the application is defined by the appended claims and their equivalents.

Claims

1. An assembled counterfort system with mortise and tenon joints, comprising a main building (1) and a retaining wall (2), characterized in that: The prefabricated stacked beam (3) is arranged between the main building (1) and the retaining wall (2). The prefabricated stacked beam (3) comprises a prefabricated beam A (31) with a base, a plurality of prefabricated beams B (32) and a prefabricated beam C (33), the prefabricated beam A (31) is arranged on the ground between the main building (1) and the retaining wall (2) through the base, the plurality of prefabricated beams B (32) are sequentially arranged above the prefabricated beam A (31) through the mortise and tenon connection mode, the prefabricated beam C (33) is arranged above the topmost prefabricated beam B (32) through the mortise and tenon connection mode, and the two ends of the prefabricated beam A (31), the prefabricated beam B (32) and the prefabricated beam C (33) are respectively hinged to the main building (1) and the retaining wall (2). The prefabricated stacked beam (3) further comprises a top pressing beam (34), which is arranged above the prefabricated beam C (33) through the cast-in-place mode. The upper surfaces of the prefabricated beam A (31) and the prefabricated beam B (32) are provided with U-shaped tenon grooves (35), and the lower surfaces of the prefabricated beam B (32) and the prefabricated beam C (33) are provided with U-shaped tenon joints (36) matched with the U-shaped tenon grooves (35).

2. An assembled laminated bracing system with mortise and tenon joints as claimed in claim 1, wherein: Two layers of rubber-based synthetic polymer coiled materials are arranged at the joint parts between the prefabricated beam A (31) and the prefabricated beam B (32) and the joint parts between the prefabricated beam B (32) and the prefabricated beam C (33), and waterproof mortar is cast at the remaining contact positions between the prefabricated beam A (31) and the prefabricated beam B (32) and the remaining contact positions between the prefabricated beam B (32) and the prefabricated beam C (33) except the joint parts.

3. The assembled laminated bracing system with mortise and tenon joints of claim 1, wherein: Waterproof rubber pads (37) are arranged at the connection parts of the prefabricated beam A (31), the prefabricated beam B (32) and the prefabricated beam C (33) and the main building (1).

4. The panelized assembly of a shoring system with dovetail joints according to claim 1, wherein: Waterproof mortar is cast at the connection parts of the prefabricated beam A (31), the prefabricated beam B (32) and the prefabricated beam C (33) and the main building (1).

5. The panelized assembly of a mortise and tenon jointed retaining system of claim 1, wherein: The soil-water contact surfaces of the connection parts between the prefabricated beam A (31) and the prefabricated beam B (32) and the connection parts between the prefabricated beam B (32) and the prefabricated beam C (33) are coated with a rubber waterproof layer, the soil-water contact surface of the prefabricated stacked beam (3) is coated with a lubricant, and the lubricant is located outside the rubber waterproof layer.

6. The panelized assembly of a mortise and tenon jointed retaining system of claim 1, wherein: The prefabricated beam A (31) is installed through the waterproof mortar plus bolt connection with the water-stopping steel sheet.

7. A method of constructing an assembled timbering system with dovetail joints according to any one of claims 1 to 6, characterized in that: The construction method comprises the following steps: S1, the prefabricated beam A (31) with the base is installed on the ground between the main building (1) and the retaining wall (2) through the waterproof mortar plus bolt connection with the water-stopping steel sheet, and the two ends of the prefabricated beam A (31) are hinged to the main building (1) and the retaining wall (2). S2, two layers of rubber polymer coiled material are arranged at the U-shaped tenon groove (35) of the prefabricated beam A (31), then the U-shaped tenon joint (36) of the first prefabricated beam B (32) is aligned with the U-shaped tenon groove (35) of the prefabricated beam A (31) and connected, the two ends of the first prefabricated beam B (32) are respectively hinged with the main building (1) and the retaining wall (2), and finally waterproof mortar is poured between the first prefabricated beam B (32) and the prefabricated beam A (31) except the joint part, and the installation of the first prefabricated beam B (32) is completed; S3, two layers of rubber polymer coiled material are arranged at the U-shaped tenon groove (35) of the first prefabricated beam B (32), then the U-shaped tenon joint (36) of the second prefabricated beam B (32) is aligned with the U-shaped tenon groove (35) of the prefabricated beam A (31) and connected, the two ends of the second prefabricated beam B (32) are respectively hinged with the main building (1) and the retaining wall (2), and finally waterproof mortar is poured between the second prefabricated beam B (32) and the prefabricated beam A (31) except the joint part, and the installation of the second prefabricated beam B (32) is completed; S4, the step S3 is repeated to complete the installation of the last prefabricated beam B (32); S5, two layers of rubber polymer coiled material are arranged at the U-shaped tenon groove (35) of the last prefabricated beam B (32), then the U-shaped tenon joint (36) of the prefabricated beam C (33) is aligned with the U-shaped tenon groove (35) of the last prefabricated beam B (31) and connected, the two ends of the prefabricated beam C (33) are respectively hinged with the main building (1) and the retaining wall (2), and finally waterproof mortar is poured between the prefabricated beam C (33) and the last prefabricated beam B (32) except the joint part, and the installation of the prefabricated beam C (33) is completed; S6, the upper surface of the prefabricated beam C (33) is chiseled, and the coping beam (34) is poured to form the prefabricated stacked beam (3); S7, the soil-water contact surface at the connection between the prefabricated beam A (31) and the prefabricated beam B (32), and the soil-water contact surface at the connection between the prefabricated beam B (32) and the prefabricated beam C (33) are coated with a rubber waterproof layer 2-3 times, and the rubber waterproof layer exceeds the connection by more than 300mm upward and downward; S8, a lubricant is applied to the soil-water contact surface of the prefabricated stacked beam (3), and the construction is completed.

Images