CN102777032B - Installation method of prefabricated toilet - Google Patents

Abstract

The invention discloses a method for installing a prefabricated toilet, which comprises the following steps: d: levelling a floor (25), laying a structural floor slab (26) on the edges of the floor (25); e: paving a layer of cement mortar (27) on the floor (25), and then paving and tightly attaching the prefabricated toilet on the cement mortar (27); f: starting from a transverse reinforcing steel bar (18) extending from a bottom plate unit (11) of the prefabricated toilet, building a bottom reinforcing mesh (42) which is tightly connected with the transverse reinforcing steel bar (18) on a structural floor plate (26), and then casting concrete on the bottom reinforcing mesh (42) to firmly integrate the bottom plate unit (11) of the prefabricated toilet and the structural floor plate (26); g: at least one wall unit (12) of the prefabricated toilet is connected with the wall unit of the vertical adjacent floor. The installation method of the invention can save space, so that the indoor space of the prefabricated toilet is relatively wide, and the structure is firm and stable.

Description

Installation method of prefabricated toilet

This application is a divisional application of the Chinese invention patent application with the application number "201110064450.3", the application date is March 17, 2011, and the title is "prefabricated toilet and its construction and installation method".

technical field

The invention relates to a building installation method, in particular to a prefabricated toilet installation method, and the invention can be widely applied to various high-rise buildings.

Background technique

The bathroom is an indispensable part of residential buildings. At present, the following two methods are generally used to build the bathroom:

One is to directly cast the concrete frame on the construction site and build the toilet block by block. This is the most traditional and commonly used toilet construction method. This traditional toilet construction method has a long construction period and high construction costs. Moreover, due to the use of building materials The non-standard quality standard of the bathroom cannot be well guaranteed.

The second is to prefabricate the complete toilet in the factory, and then transport it to the construction site for installation. For example, the Chinese invention patent application whose application number is 01116978 discloses a construction and installation method of a self-contained bathroom unit that can be installed in a multi-storey building. Transported to the construction site for use, the bathroom wall is poured with facility pipes, vacancies for lighting control boxes, openings for windows and drainage pipes, when installing the bathroom unit, it is only necessary to place the bathroom as a whole in the pre-delineated Grouted floors, next to structural walls, then fill in joints with grout. Although this method of prefabricated bathrooms can shorten the construction period and ensure uniform quality standards for the bathrooms, it still has the following defects: the prefabricated bathrooms are directly placed on the floor slabs, and are prone to displacement only through simple concave-convex coordination positioning. In addition, all the walls, floors and ceilings of this prefabricated toilet occupy a certain width and height space, resulting in the space of the prefabricated toilet being significantly smaller than that of the traditional cast-in-place toilet.

Contents of the invention

The technical problem to be solved by the present invention is to provide a method for installing a prefabricated toilet that can save space and have a firm and stable structure.

The present invention adopts the following technical solutions to solve the above-mentioned technical problems:

A method for installing a prefabricated toilet, the prefabricated toilet includes a floor unit fixedly connected to each other, four wall units and a ceiling unit, the floor unit, the wall unit and the ceiling unit are constructed of reinforced concrete, the installation The method includes the following steps:

Step D: Leveling the floor for installation of the prefabricated toilet, laying a structural floor panel on the edge of said floor;

Step E: laying a layer of cement mortar on the floor, and then laying the prefabricated toilet on the cement mortar, and making it closely adhere to the cement mortar;

Step F: starting from the transverse steel bars extending from the floor unit of the prefabricated toilet, building a bottom steel mesh closely connected with the transverse steel bars on the structural floor slab, and then casting concrete meeting the requirements on the bottom steel mesh, Thus, the floor unit of the prefabricated toilet is firmly integrated with the structural floor panel;

Step G: connecting at least one wall unit of the prefabricated toilet with the wall units of the vertically adjacent floors.

The step D specifically includes the following steps:

Step D1: Delineating a floor for placing prefabricated toilets, leveling and cleaning said floor;

Step D2: arranging a horizontally corrected cushion or support block on the floor;

Step D3: Build a frame, and lay a structural floor slab adjacent to the floor on the frame.

The following step is also included between the steps E and F: locking the prefabricated toilet and the vertically adjacent floors together by temporarily fixing nuts and fixing frames, so as to temporarily fix the prefabricated toilet.

When the wall unit is a fully prefabricated structural wall, the fully prefabricated structural wall includes a connecting hole extending into the wall from the lower edge of the wall and a grouting hole arranged on the wall, the connecting hole and the grouting hole communicate with each other and form a There is a grouting channel, and the connecting hole of the fully prefabricated structural wall is docked with the connecting hole of the structural wall of the adjacent floor; the step G specifically includes the following steps:

inserting internal steel bars into the grouting channel of the fully prefabricated structural wall;

Cement mortar is poured into the grouting channel through the grouting hole of the fully prefabricated structural wall, so that the fully prefabricated structural wall is integrated with the structural wall of the adjacent floor.

When the wall unit is a semi-prefabricated structural wall, the thickness of the semi-prefabricated structural wall is smaller than the overall thickness of the building structural wall, and the outer side of the semi-prefabricated structural wall has a rough outer surface with alternate convex and concave, and the step G specifically includes Follow the steps below:

Bind steel bars on the outside of the semi-prefabricated structural wall and make it overlap and fix with the prefabricated exposed steel bars on the top of the next layer of structural wall to form the external wall reinforcement mesh, and then install the cast-in-place formwork on the outside of the external wall reinforcement mesh , injecting qualified concrete into the external wall reinforcement mesh between the cast-in-place template and the semi-prefabricated structural wall to form a cast-in-place structural wall, and the cast-in-place structural wall and the semi-prefabricated structural wall are firmly combined to form a complete structure exterior walls.

Compared with the prior art, the present invention has the following beneficial technical effects: 1) The wall unit of the prefabricated toilet is used as a building structural wall or a part of the building structural wall, and the floor unit and the ceiling unit are used as a part of the structural floor panel, thereby It can reduce the occupancy of the prefabricated toilet wall to the internal space of the toilet, so that the indoor space of the toilet is relatively open; 2) The horizontal reinforcement on the edge of the floor unit of the toilet is connected with the reinforcement of the structural floor panel located on its outer edge, and concrete is poured on it , the base plate unit and the structural floor plate can be connected as a whole, thereby ensuring that the quality of the toilet bottom unit is stable, tightly combined, and difficult to shift.

Description of drawings

Fig. 1 is the overall structural representation of the prefabricated toilet of the present invention;

Fig. 2 is the schematic diagram of building the bottom unit and the outline of the lower part of the prefabricated toilet in the construction method of the prefabricated toilet of the present invention;

Fig. 3 is the schematic diagram of the grouting passage inside the manufacturing wall of the construction method of the prefabricated toilet of the present invention;

Fig. 4 is the connection schematic diagram of horizontal steel bar and vertical steel bar of the construction method of prefabricated toilet of the present invention;

Fig. 5 is the schematic diagram of casting concrete, forming the bottom unit and the lower part of the prefabricated toilet in the construction method of the prefabricated toilet of the present invention;

Fig. 6 is the schematic diagram of the demolition steel form of the construction method of prefabricated toilet of the present invention;

Fig. 7 is a schematic diagram of lifting the lower half of the prefabricated toilet in the construction method of the prefabricated toilet of the present invention;

Fig. 8 is a schematic diagram of building the upper part of the prefabricated toilet and the ceiling unit frame of the construction method of the prefabricated toilet according to the present invention;

Fig. 9 is a schematic diagram of the installation of the upper inner mold of the construction method of the prefabricated toilet of the present invention;

Fig. 10 is a schematic diagram of the connection method of the horizontal reinforcing bars and the vertical reinforcing bars of the construction method of the prefabricated toilet of the present invention;

Fig. 11 is the schematic diagram of installing the upper outer mold of the construction method of the prefabricated toilet of the present invention;

Fig. 12 is the schematic diagram of casting concrete, forming the upper half of the prefabricated toilet and the ceiling unit of the construction method of the prefabricated toilet of the present invention;

Fig. 13 is the schematic diagram of dismounting the upper inner and outer steel molds of the construction method of the prefabricated toilet of the present invention;

Fig. 14 is a schematic diagram of installing a squatting toilet or sitting toilet in the construction method of the prefabricated toilet of the present invention;

Fig. 15 is a schematic diagram of the connection structure of the semi-prefabricated structural wall of the prefabricated toilet of the present invention;

Fig. 16 is a schematic diagram of the structure and position of the connecting structure of the semi-prefabricated structural wall of the prefabricated toilet of the present invention and the exposed steel bar 39;

Fig. 17 is a schematic diagram of the present invention lifting the prefabricated toilet by the hanger 40;

Fig. 18 is a schematic diagram of delineating the installation location (floor) and arranging support blocks of the installation method of the prefabricated toilet of the present invention;

Fig. 19 is a schematic diagram of the erection bracket of the installation method of the prefabricated toilet of the present invention;

Fig. 20 is a schematic diagram of the laying structure floor panel of the installation method of the prefabricated toilet of the present invention;

Fig. 21 is a schematic diagram of pouring cement mortar onto the structural floor panel of the installation method of the prefabricated toilet of the present invention;

Fig. 22 is a schematic diagram of lifting the prefabricated toilet according to the installation method of the prefabricated toilet of the present invention;

Figure 23 is a schematic diagram of the connection of the bottom unit transverse reinforcement 18 of the installation method of the prefabricated toilet of the present invention;

Fig. 24 is the schematic diagram of forming the bottom reinforcing mesh 42 of the installation method of the prefabricated toilet of the present invention;

Fig. 25 is a schematic diagram of casting concrete and integrating the bottom unit and the structural floor panel in the installation method of the prefabricated toilet of the present invention;

Fig. 26 is a schematic diagram of the positional relationship of the grouting hole 1212 of the fully prefabricated structural wall of the prefabricated toilet of the present invention;

Fig. 27 is a schematic diagram of the connection method of the prefabricated structural wall of the installation method of the prefabricated toilet of the present invention;

Fig. 28 is the schematic diagram of the installation method of the prefabricated toilet of the present invention forming the external wall reinforcement mesh 43 on the outside of the semi-prefabricated structural wall;

Fig. 29 is a schematic diagram of building a cast-in-place formwork and a cast-in-place external wall reinforcing mesh 43 in the installation method of the prefabricated toilet of the present invention;

Fig. 30 is a schematic diagram of casting concrete on the outside of the semi-prefabricated structural wall to form a part of the cast-in-situ structural outer wall in the installation method of the prefabricated toilet of the present invention.

Detailed ways

In order to make the object, technical solution and advantages of the present invention clearer, the present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described here are only used to explain the present invention, not to limit the present invention.

As shown in Fig. 1, Fig. 23 and Fig. 29, the prefabricated toilet of the present invention includes a floor unit 11, four wall units 12 and a ceiling unit 13 which are fixedly connected to each other, and the floor unit 11, four wall units 12 and The ceiling unit 13 is made of reinforced concrete, the wall unit 12 is provided with a window, and water supply and drainage pipes, wiring pipes and lighting control boxes are pre-buried in it, and the base unit 11 is installed with a squatting toilet or sitting toilet 37 , the lower parts of the base unit 11 and the four wall units 12 are coated with a waterproof layer. The above-mentioned technical features of the prefabricated toilet are basically the same as the prior art, and the prefabricated toilet of the present invention is different from the prior art in that at least one of the four wall units 12 is used as a building structural wall or A part of the structural wall of the building, when the wall unit is used as the structural wall of the building, the present invention calls it a fully prefabricated structural wall 121 (see Figure 27), and when the wall unit is used as a part of the structural wall of the building, the present invention calls it semi-prefabricated The structural wall 122, the semi-prefabricated structural wall 122 must be combined with part of the cast-in-place structural wall to form a complete structural wall (see Figure 29). Both the fully prefabricated structural wall 121 and the semi-prefabricated structural wall 122 are provided with a connecting structure fixedly connected to the adjacent structural wall. Does the prefabricated bathroom use fully prefabricated structural walls or semi-prefabricated structural walls? And which walls need to be set as structural walls? Those skilled in the art can fully determine it according to the load situation of the building wall.

At least one of the base unit 11 and the ceiling unit 13 is used as a part of the structural floor. In the embodiment of the present invention, the base unit 11 of the toilet is used as a part of the structural floor. At least one edge of the floor unit 11 is provided with a transverse reinforcement 18 (refer to FIG. 23 ). The transverse reinforcement extends horizontally for a certain length and overlaps and fixes with the reinforcement of the adjacent structural floor slab. That is to say, the embodiment of the present invention connects the transverse steel bar 18 on the edge of the bottom plate unit 11 of the toilet with the steel bar of the structural floor panel located at its outer edge, and pours concrete on it, so that the bottom plate unit 11 and the structure The floor panels are connected as a whole, thereby ensuring that the quality of the bottom unit 11 of the bathroom is stable, tightly combined, and difficult to shift.

As shown in Figure 27, the connecting structure of the full prefabricated structural wall 121 includes a connecting hole 1211 extending into the interior of the wall from the lower edge of the wall and a grouting hole 1212 arranged on the wall, the connecting hole 1211 and the grouting hole 1212 communicate with each other and form a grouting channel 1214 . The connecting hole 1211 is docked with the connecting hole of the structural wall of the adjacent floor, the internal steel bar 38 is inserted in the grouting channel 1214 and the butted connecting hole, and the grouting channel 1214 and the grouting channel 1214 are connected to the grouting channel 1212 through the grouting hole 1212. The butt connecting holes are filled with cement mortar, and the fully prefabricated structural wall 121 is integrated with the structural walls of adjacent floors.

As shown in Figure 15, the outer side of described semi-prefabricated structural wall 122 has the rough outer surface with alternating concave and convex, and its thickness is smaller than the overall thickness of building structural wall; 122 connecting structure is integrated with the cast-in-place structural wall located on its outer side to form a complete structural wall. As shown in Figure 16, Figure 29 and Figure 30, the semi-prefabricated structural wall 122 and the cast-in-place structural wall located on its outer side are integrated to form a complete structural wall, and the cast-in-place structural wall contains external wall reinforcement mesh 43, the outer wall reinforcement mesh 43 is connected with the exposed reinforcement bars 39 of the building structure wall on the next floor.

As shown in Fig. 4 and Fig. 12, the upper surfaces of the floor unit 11 and the ceiling unit 13 are respectively provided with a first steel hook 141 and a second hook 142 which are convenient for hoisting, and the second hook is hidden in the The bottom plate unit 11 and the wall of the ceiling unit 13 are inside, and are fixedly connected with the transverse steel bar 18 .

The construction method of the prefabricated toilet of the present invention is illustrated below by taking the use of a fully prefabricated structural wall as an example. The construction method is shown in Figures 2 to 16 and includes the following steps:

1) Build the bottom unit 11 and the lower part of the four wall units 12 of the prefabricated toilet by the bottom steel form 16 and the upright steel form 17 (Fig. 2);

2) Place a cavity pipe 31 that interferes with the bottom steel mold 16 in one of the vertical steel molds 17, for making a grouting channel 1214 extending from the lower edge of the wall into the interior of the wall (Fig. 3);

3) Fasten the horizontal steel bar 18 and the vertical steel bar 19 and fix them in the bottom steel mold 16 and the vertical steel mold 17 respectively, and then pre-embed the first steel hook 141 and the water supply and drainage pipe 15 in the bottom Steel mold 16 and described upright steel mold 17, make described first steel suspension hook 14 be firmly connected with described transverse reinforcing bar 18 simultaneously, as shown in Figure 4;

4) Pour concrete that meets the requirements into the inner space surrounded by the bottom steel mold 16 and the upright steel mold 17, as shown in Figure 5;

5) After the concrete reaches a certain strength, remove the vertical steel mold 17 and the cavity pipe 31, thereby forming the bottom unit 11 of the prefabricated toilet and the lower part 51 of the prefabricated toilet (Fig. 6);

6) Lift the bottom unit 11 and the lower part 51 of the prefabricated toilet completed in the above steps to another construction site, and carry out the construction of the upper part 52 of the prefabricated toilet and the ceiling unit 13, as shown in Figure 7; The construction site carries out the construction of the upper part 52 of the prefabricated bathroom and the ceiling unit 13, so step 6) is an unnecessary step;

7) Connect the structural steel bar 32 forming the outline of the upper part of the wall unit and the ceiling unit 13 with the vertically exposed steel bar at the top of the lower part 51 of the prefabricated toilet to form a complete frame of the four wall units 12 and the ceiling unit 13, As shown in Figure 8;

8) Arrange an upper inner aluminum formwork 20 ( FIG. 9 ) on the inner side of the frame of the four wall units 12 and ceiling unit 13; the upper inner formwork 20 can be an aluminum formwork, a steel formwork or a wood formwork;

9) Bind and weave the transverse reinforcing bars 21 and vertical reinforcing bars 22 on the outer edge of the upper inner aluminum mold 20, the transverse reinforcing bars 21 and the vertical reinforcing bars 22 are respectively connected with the structural reinforcing bars 32 to form a reinforcing mesh , as shown in Figure 10;

10) Arrange the upper outer formwork 23 (which can be aluminum formwork, steel formwork or wood formwork) on the outside of the frame of the four wall units 12 and the ceiling unit 13, and keep the second fixed steel formwork 23 by adjusting the lever 35 vertical, and make the steel mesh firmly clamped between the upper inner aluminum mold 21 and the upper outer mold 23, as shown in Figure 11;

11) Install the cold water pipe 33, the hot water pipe 34 and the lighting control box 36 at appropriate positions on the frame of the four wall units 12, and pre-embed the second steel hook 142 in the upper inner aluminum mold 20 The outer edge is connected with the structural steel bar 32, and then the concrete meeting the requirements is poured into the inner space surrounded by the first fixed steel mold 20 and the second fixed steel mold 23 (Fig. 12);

12) After the concrete reaches a certain strength, remove the upper inner aluminum mold 20 and the upper outer mold 23, thereby completing the construction of the upper part 52 of the prefabricated bathroom, as shown in Figure 13;

13) Apply waterproof paint to the bottom unit 11 and four wall units 12 below a predetermined height to form a waterproof layer, then install a squatting toilet or sitting toilet 37 and paste tiles 41, as shown in Figure 14.

Through the above steps, the prefabricated toilet of the present invention can be completed, and the obtained four wall units are all prefabricated structural walls. The construction method of the semi-prefabricated structural wall is basically similar to that of the fully prefabricated structural wall. The difference is that the cavity pipe 31 does not need to be installed or removed during the construction of the semi-prefabricated structural wall, that is, the grouting channel 1214 does not need to be constructed. The wall unit of the semi-prefabricated structural wall can be made into a rough surface with alternating concavities and convexities (as shown in Figure 15).

In the embodiment of the present invention, in order to facilitate the lifting and transportation of the completed prefabricated toilet, a second steel hook 142 is provided on the ceiling unit 13 of the prefabricated toilet. The hanger 40 buckles the second steel hook 142 (as shown in FIG. 17 ), and the prefabricated toilet can be hoisted to a designated location for installation. In addition, the present invention can also set two temporary fixing nuts 24 on the outer surface of one of the four wall units 12 for temporarily connecting the wall units on the adjacent floors when installing the prefabricated toilet. This temporary fixing nut 24 and its locking structure can be removed after the toilet and the building structure wall of the next floor are tightly connected.

The installation method of the prefabricated toilet of the present invention is introduced below, and the installation method is shown in Figure 18 to Figure 25, including the following steps:

1) Designate a floor 25 for installing and placing prefabricated toilets, level and clean the floor 25 (Fig. 18);

2) Arrange a horizontally corrected cushion or support block 28 on the floor 25 (Fig. 19);

3) Build a support 29, and lay a structural floor panel 26 adjacent to the floor 25 on the support 29, as shown in Figure 20;

4) As shown in Figure 21, lay a layer of cement mortar 27 on the floor 25;

5) Hoist the prefabricated toilet by a hanger 40, make it flat on the cement mortar 27, and fit closely with the cement mortar 27, as shown in Figure 22;

6) Lock the prefabricated toilet and the adjacent floor together through the temporary fixing nut 24 and the fixing frame 30, as shown in Figures 23 and 24;

7) Please refer to Figures 23 and 24 again, starting from the horizontal reinforcement 18 extending from the prefabricated bathroom floor unit 11, build a bottom reinforcement mesh 42 on the structural floor panel 26 to closely connect with the horizontal reinforcement 18;

8) Cast concrete that meets the requirements on the bottom steel mesh 42, so that the floor unit 11 of the prefabricated toilet and the structural floor panel 26 are firmly integrated, as shown in FIG. 25 .

The above steps have realized the installation and fixing of the floor unit 11 of the prefabricated toilet of the present invention. Taking the fully prefabricated structural wall 121 and the semi-prefabricated structural wall 122 as examples below, the installation method of the wall unit of the prefabricated toilet of the present invention is introduced.

When the wall unit is a fully prefabricated structural wall 121, the installation method is: insert the internal steel bar 38 in the grouting channel 1214 of the fully prefabricated structural wall 121, and pass through the grouting hole 1212 of the fully prefabricated structural wall 121 (as shown in Figure 26 and Fig. 27) Pour cement mortar into the grouting channel 1214, so that the fully prefabricated structural wall 121 is integrated with the structural wall of the adjacent floor.

When the wall unit is a semi-prefabricated structural wall 122, the installation method is shown in Figure 28 to Figure 30:

As shown in Figure 28, starting from the exposed steel bar 39 on the top of the building structural wall on the next floor of the semi-prefabricated structural wall 122, the steel bar is overlapped on the outside of the semi-prefabricated structural wall 122 and overlapped with the exposed steel bar 39 Fix to form the outer wall reinforcement mesh 43;

Install the cast-in-place plate 1223 on the outside of the external wall steel mesh 43, as shown in Figure 29;

Inject qualified concrete into the clamped and fixed outer wall reinforcement mesh 43 to form a cast-in-place structural wall, and the cast-in-place structural wall and the semi-prefabricated structural wall 122 are firmly combined to form a complete structural outer wall, as shown in Figure 30 shown;

Finally, after the complete structural exterior wall is formed, the cast-in-place formwork 1223 serving as a temporary clamping and fixing function needs to be dismantled, and the temporary fixing nut 24 and the fixing frame 30 need to be dismantled.

The above descriptions are only preferred embodiments of the present invention, and are not intended to limit the present invention. For those skilled in the art, the present invention may have various modifications and changes. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included within the protection scope of the present invention.

Claims (3)

1. An installation method for a prefabricated toilet, the prefabricated toilet includes a base unit (11), four wall units (12) and a ceiling unit (13) fixedly connected to each other, the base unit (11), wall The unit (12) and the ceiling unit (13) are constructed of reinforced concrete, characterized in that said installation method comprises the following steps: Step D: leveling the floor (25) for installing the prefabricated toilet, laying a structural floor panel (26) on the edge of the floor (25); Step E: laying a layer of cement mortar (27) on the floor (25), and then laying the prefabricated toilet on the cement mortar (27), and making it close to the cement mortar (27) fit; Step F: Starting from the horizontal reinforcement (18) extending from the floor unit (11) of the prefabricated toilet, a bottom reinforcement mesh (42) tightly connected to the horizontal reinforcement (18) is built on the structural floor panel (26) ), and then cast concrete that meets the requirements on the bottom steel mesh (42), so that the floor unit (11) of the prefabricated toilet is firmly integrated with the structural floor panel (26); Step G: connecting at least one wall unit (12) of the prefabricated toilet with the wall unit of the vertical adjacent floor; When the wall unit is a fully prefabricated structural wall (121), the fully prefabricated structural wall (121) includes connecting holes (1211) extending from the lower edge of the wall into the interior of the wall and grouting holes (1212) arranged on the wall , the connecting hole (1211) and the grouting hole (1212) communicate with each other and form a grouting channel (1214), the connecting hole (1211) of the full prefabricated structural wall (121) is docked with the connecting hole of the structural wall of the adjacent floor ; The step G specifically includes the following steps: Inserting internal steel bars (38) into the grouting channel (1214) of the full prefabricated structural wall (121); pouring cement mortar into the grouting channel (1214) through the grouting hole (1212) of the full prefabricated structural wall (121), so that the full prefabricated structural wall (121) is integrated with the structural wall of the adjacent floor; When the wall unit is a semi-prefabricated structural wall (122), the thickness of the semi-prefabricated structural wall (122) is smaller than the overall thickness of the building structural wall, and the outer side of the semi-prefabricated structural wall (122) has rough The outer surface, the step G specifically includes the following steps: Steel bars are bound on the outside of the semi-prefabricated structural wall (122) and are overlapped and fixed with the prefabricated exposed steel bars (39) on the top of the next layer of structural wall to form the outer wall reinforcement mesh (43), and then A cast-in-place formwork (1223) is installed on the outside of the exterior wall reinforcement mesh (43), and concrete that meets the requirements is injected into the exterior wall reinforcement mesh (43) between the cast-in-place formwork (1223) and the semi-prefabricated structural wall (122) to A cast-in-place structural wall is formed, and the cast-in-place structural wall is firmly combined with the semi-prefabricated structural wall (122) to form a complete structural outer wall. 2. the installation method of prefabricated toilet according to claim 1, is characterized in that, described step D specifically comprises the following steps: Step D1: Delineating a floor (25) for placing prefabricated toilets, leveling and cleaning the floor (25); Step D2: arranging a horizontally corrected cushion or support block (28) on the floor (25); Step D3: Build a frame (29), and lay a structural floor panel (26) adjacent to the floor (25) on the frame (29). 3. The installation method of prefabricated toilet according to claim 1, characterized in that, between the steps E and F, the following steps are also included: The prefabricated toilet and the vertically adjacent floors are locked together by temporary fixing nuts (24) and fixing frames (30), so as to temporarily fix the prefabricated toilet.