Construction method of assembled integral wall for rail transit building

Abstract

The invention belongs to the field of underground building construction, and particularly relates to a construction method of an assembled integral wall for a rail transit building, which comprises the following steps: step 1, two pieces of dense rib mandrels are fixedly connected through bolts, and the fixed dense rib mandrels are wall skeletons; secondly, according to construction requirements, construction is conducted on the connecting points of the wall bodies, and the wall body framework manufactured in the first step is subjected to connecting joint construction through a reinforcing device; thirdly, after construction of the connecting joints of all the walls is completed, all the wall frameworks are connected and formed, and steel wire meshes are erected on the outer vertical faces of the wall frameworks; 4, according to the drawing requirement, a hole allowing a pipeline to pass through is formed in the wall face; and fifthly, mortar spraying and building are conducted on the steel wire mesh through a movable spraying and building machine, and then the wall face is trowelled through a slicking machine. The connecting joint plays a role in restraining the ends, and the construction technology of transmission constructional columns and ring beams is replaced.

Description

Technical Field

[0001] The present invention relates to the field of underground building construction, and in particular to a method for constructing an assembled integral wall for a rail transit building. Background Art With the acceleration of urbanization and the rapid development of rail transit, rail transit stations, as important hubs of urban transportation, are increasingly valued for their interior space environment comfort, safety, and energy-saving and environmental protection performance. As an important component of the station's interior space, the performance of the partition wall system directly affects the overall environmental quality of the station. Traditional partition wall materials have complex construction processes and long construction cycles, making them difficult to adapt to the rapid development needs of rail transit construction. In addition, they have limited sound insulation effects, are susceptible to moisture and damage, and have high subsequent maintenance costs, which increases the operational burden. Existing technologies usually use traditional full-scale and structural columns for wall construction. When constructing traditional structural columns, if openings need to be made, the openings are greatly limited due to the structure of the structural columns.

[0002] Therefore, in order to solve the above-mentioned problems, a method for constructing an assembled integral wall for rail transit buildings is proposed. Summary of the Invention

[0003] The present invention is aimed at the above-mentioned problems and specifically designs an assembled integral wall construction method for rail transit buildings. The connection nodes of the present application play an end constraint role, replacing the construction process of transmission structural columns and ring beams, improving the integrity of the partition wall system, and replacing the traditional ring beam structural column construction process with a dense rib structure, simplifying the construction steps and greatly shortening the construction period.

[0004] To achieve the above-mentioned object, the present invention provides a method for constructing an assembled integral wall for a rail transit building, comprising the following steps: Step 1: Fixing and connecting two dense-ribbed core molds by bolts, wherein the fixed dense-ribbed core molds serve as a wall skeleton; Step 2: According to the construction requirements, the connection points between the walls are constructed, and the wall skeletons made in the above steps are connected to the nodes through the reinforcement device; Step 3: After the connection nodes of each wall are constructed, all the wall frames are connected and formed, and the wire mesh is erected on the outer facade of the wall frame; Step 4: According to the drawing requirements, open holes on the wall for pipelines to pass through; Step 5: Use a mobile spraying machine to spray mortar on the wire mesh, and then use a scraper to smooth the wall surface.

[0005] Through the above method, the dense-rib core mold is prefabricated, and the two dense-rib core molds are fixed by screws after being fitted together, forming several cavities in the middle. Through the above method, the skeleton structure inside the wall is formed, and the skeleton is arranged into a wall according to the design requirements of the drawing. At the connection position of the wall skeleton, different connection forms are fixed using different construction methods.

[0006] Furthermore, in step 2, the connection nodes at the corners of the wall are divided into: L-shaped connection nodes, T-shaped connection nodes and cross-shaped connection nodes.

[0007] Furthermore, the construction method of the L-shaped connection node is: when the ends of the two wall frames are connected, the two reinforcement devices are respectively fixed on the outer side and the inner side of the corners of the two wall frames.

[0008] Furthermore, the construction method of the T-shaped connection node is: when the two wall frames are connected, the end of one wall frame is connected to the side of the other wall frame, and the two wall frames are fixed at the two corners of the connection point by the reinforcement device.

[0009] Furthermore, the cross-shaped connection node is constructed in such a manner that two sides of one wall frame are connected to another wall frame, and the wall frames are fixedly connected at the corners of the connection points thereof by the reinforcement device.

[0010] This method is used to connect adjacent prefabricated wall panel units, ensuring the integrity and stability of the wall. The connection nodes are bolted and grout-connected, with corner reinforcements installed to provide end restraints. Seismic design is also implemented to meet the seismic performance requirements of rail transit buildings. Mortar is poured and compacted into the cavity at the connection node, the reinforcement, and the wall formed by the multi-ribbed core formwork.

[0011] Furthermore, the reinforcement device includes a fixing plate and screws, and the fixing plate is a long plate-shaped structure with two sides, and the two sides are respectively connected to the adjacent wall frames through the screws.

[0012] Furthermore, in the step 4, a hole reinforcement piece is installed on the frame of the hole.

[0013] Furthermore, in step 4, when the distance between the upper edge of the opening and the bottom of the structural beam or the bottom of the slab is greater than or equal to 400 mm, corner reinforcement pieces are obliquely provided at the corners of the opening.

[0014] Furthermore, in step 4, when the distance between the upper edge of the opening and the bottom of the structural beam or the bottom of the slab is greater than or equal to 500 mm, a hanger bar needs to be provided above the opening.

[0015] Furthermore, both sides of the hole need to be filled, and the filling width on both sides is not less than 100 mm. When there is less than one cavity, the adjacent cavity needs to be filled.

[0016] In summary, the method for constructing an assembled integral wall for a rail transit building of the present invention has the following advantages and beneficial technical effects: 1. The present invention has a fast construction speed: the prefabricated wall panel units are prefabricated in the factory, with controllable quality, which can effectively avoid the common quality problems in traditional cast-in-place concrete wall construction. On-site installation and cast-in-place concrete construction are only required, which can greatly shorten the construction period. 2. The multi-rib core mold of the present invention is prefabricated in the factory, which can reduce on-site construction noise, dust and construction waste, and is in line with the development concept of green buildings; 3. The wall skeleton structure manufactured by the dense-rib core mold of the present invention can conveniently open holes at any position, overcoming the limitation of opening holes caused by the structure of the structural column in the traditional technology. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] The above and / or additional aspects and advantages of the present invention will become apparent and readily understood from the following description of the embodiments with reference to the accompanying drawings, in which: Figure 1 This is a schematic diagram of an L-shaped connection node in a method for constructing an assembled integral wall for a rail transit building according to the present invention; Figure 2 This is a schematic diagram of a T-shaped connection node in a method for constructing an assembled integral wall for a rail transit building according to the present invention; Figure 3 This is a schematic diagram of a cross-shaped connection node in a method for constructing an assembled integral wall for a rail transit building according to the present invention; Figure 4 This is a schematic diagram of the opening structure in a method for constructing an assembled integral wall for a rail transit building according to the present invention; Figure 5 This invention Figure 4 A vertical cross-sectional view of Figure 6 This invention Figure 4 A horizontal cross-sectional view in FIG. Figure 7 It is a structural schematic diagram of the hole reinforcement member of the present invention; Figure 8 It is a schematic diagram of the installation structure of the hanger bar of the present invention.

[0018] The reference numerals in the accompanying drawings are: 1-Dense-rib core mold; 2-Wire mesh; 3-Reinforcement device; 31-Fixed plate; 32-Screw; 4-Opening; 5-Wall skeleton; 6-Opening reinforcement; 7-Corner reinforcement; 8-Hanging rod. DETAILED DESCRIPTION

[0019] In order to make the purpose, technical solutions and advantages of the implementation of the present invention clearer, the technical solutions in the embodiments of the present invention will be described in more detail below in conjunction with the drawings in the embodiments of the present invention. In the drawings, the same or similar reference numerals throughout represent the same or similar elements or elements with the same or similar functions; the embodiments described are part of the embodiments of the present invention, not all of the embodiments; the embodiments and directional terms described below with reference to the drawings are exemplary and intended to be used to explain the present invention, and cannot be understood as limitations on the present invention; based on the embodiments in the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention. The parts and equipment all adopt conventional models in the prior art, and the circuit connections adopt conventional connection methods in the prior art, which will not be described in detail here. The contents not described in detail in this specification belong to the prior art known to professional and technical personnel in this field. The embodiments of the present invention are described in detail below in conjunction with the drawings: Example 1 The steps include: Step 1: Use bolts to fix the two dense rib core molds 1 together. The two dense rib core molds 1 fit together to form a skeleton structure with a cavity. Then, they are connected and fixed by fastening screws. After being fixed, the two dense rib core molds 1 form a wall skeleton 5. Step 2: The wall is composed of a wall frame 5 assembled and then sprayed with mortar. According to the requirements of the construction drawings, the wall connection points are constructed, and the wall frame 5 produced in the above steps is connected to the node through the reinforcement device 3; Step 3: After the connection nodes of each wall are constructed, all the wall frames 5 are connected and formed, and the wire mesh 3 is set up on the outer facade of the wall frame 5; Step 4: According to the drawing requirements, open a hole 4 on the wall for the pipeline to pass through; Step 5: Use a mobile spraying machine to spray mortar onto the wire mesh 3, then use a scraper to smooth the wall surface. At the connection node, the cavity formed by the reinforcement device 3 and the multi-ribbed core mold 1, as well as the cavity formed by the multi-ribbed core mold 1 itself at the connection node, need to be filled with mortar and poured.

[0020] like Figure 1 As shown, in step 2, the connection nodes at the corners of the wall are divided into: L-shaped connection nodes, T-shaped connection nodes and cross-shaped connection nodes.

[0021] like Figure 1 As shown, the construction method of the L-shaped connection node is: when connecting the ends of the two wall frames 5, the two reinforcement devices 3 are fixed to the outer side and the inner side of the corners of the two wall frames 5 respectively.

[0022] like Figure 1 and Figure 2 As shown, the reinforcement device 3 includes a fixing plate 31 and screws 32. The fixing plate 31 is a long plate with two sides. The angles of the two sides of the reinforcement plate 31 vary according to the connection angles of the different wall frames 5. They are customized in advance based on the angles of the wall corners in the construction design drawings. The two sides are connected to the adjacent wall frames 5 via screws 32. The length of the reinforcement plate 31 needs to be sufficient to extend to the sides of the two wall frames 5 and to achieve substantial fixation via the screws 32.

[0023] like Figure 4 、 Figure 5 、 Figure 6 So and Figure 7 In step 4, the hole reinforcement member 6 is installed on the frame of the hole 4. The hole reinforcement member 6 has a structure of four semi-enclosed frame structures, which are clamped on the frame of the hole 4 and fixed with screws at the connection points.

[0024] like Figure 4 、 Figure 5 and Figure 6 As shown, when the distance between the upper edge of the opening 4 and the bottom of the structural beam or the bottom of the slab is greater than or equal to 400 mm, a corner reinforcement piece 7 is obliquely provided at the corner of the opening 4. The corner reinforcement piece 7 is a wire mesh structure.

[0025] like Figure 4 、 Figure 5 、 Figure 6 and Figure 8 As shown, in step 4, when the distance between the top edge of the opening 4 and the bottom of the structural beam or slab is greater than or equal to 500 mm, a hanger bar 8 is installed above the opening 4. One end of the hanger bar 8 is connected to the top structural beam, and the other end is connected to the opening reinforcement 6 via bolts. The spacing between the hanger bars 8 is no less than 0.6 m.

[0026] The two sides of the hole 4 need to be filled, and the filling width on both sides is not less than 100mm. When there is less than one cavity, the adjacent cavity needs to be filled. The top of the hole 4 also needs to be filled with mortar, and the filling height is not less than 100mm.

[0027] Example 2 The difference between this embodiment and the above embodiment is that the specific form of the connection node to be handled during construction is different.

[0028] like Figure 2As shown, the construction method of the T-shaped connection node is: when two wall frames 5 are connected, the end of one wall frame 5 is connected to the side of the other wall frame 5, and the two wall frames 5 are fixed at the two corners of the connection point through the reinforcement device 3.

[0029] Example 3 The difference between this embodiment and the above embodiment is that the specific form of the connection node to be handled during construction is different.

[0030] like Figure 3 As shown, the construction method of the cross-shaped connection node is: another wall frame 5 is connected to both sides of a wall frame 5, and the wall frames 5 are fixedly connected at the corners of the connection points with each other through the reinforcement device 3.

[0031] Finally, it should be noted that the above embodiments are intended only to illustrate the technical solutions of the present invention and are not intended to limit the present invention. Although the present invention has been described in detail with reference to the above embodiments, those skilled in the art will appreciate that modifications may be made to the technical solutions described in the above embodiments, or that some of the technical features may be replaced with equivalents; such modifications or replacements do not deviate from the spirit and scope of the technical solutions of the various embodiments of the present invention.

Claims

1. A method for constructing an assembled integral wall for a rail transit building, characterized in that: The steps include: Step 1: two pieces of dense-rib core molds (1) are fixedly connected by bolts, and the fixed dense-rib core molds (1) become a wall skeleton (5); Step 2: According to the construction requirements, the connection points between the walls are constructed, and the wall skeleton (5) produced in the above steps is connected to the nodes through the reinforcement device (3); Step 3: After the connection nodes of each wall are constructed, all the wall frames (5) are connected and formed, and the wire mesh (3) is erected on the outer facade of the wall frame (5); Step 4: According to the drawing requirements, open a hole (4) on the wall for the pipeline to pass through; Step 5: Use a mobile spraying machine to spray mortar on the steel mesh (3), and then use a scraper to smooth the wall surface.

2. A method for constructing an assembled integral wall for a rail transit building according to claim 1, characterized in that: In step 2, the connection nodes at the corners of the wall include: L-shaped connection nodes, T-shaped connection nodes and cross-shaped connection nodes.

3. The method for constructing an assembled integral wall for a rail transit building according to claim 2, characterized in that: The construction method of the L-shaped connection node is as follows: when connecting the ends of the two wall frames (5), the two reinforcement devices (3) are respectively fixed on the outer side and the inner side of the corners of the two wall frames (5).

4. The method for constructing an assembled integral wall for a rail transit building according to claim 2, wherein: The construction method of the T-shaped connection node is as follows: when the two wall frames (5) are connected, the end of one wall frame (5) is connected to the side of the other wall frame (5), and the two wall frames (5) are fixed at the two corners of the connection point by the reinforcement device (3).

5. The method for constructing an assembled integral wall for a rail transit building according to claim 2, characterized in that: The construction method of the cross-shaped connection node is as follows: two sides of one wall frame (5) are connected to another wall frame (5), and the wall frames (5) are fixedly connected at the corners of the mutual connection points through the reinforcement device (3).

6. The method for constructing an assembled integral wall for a rail transit building according to claim 1, characterized in that: The reinforcing device (3) comprises a fixing plate (31) and screws (32); the fixing plate (31) is a long plate-shaped structure with two sides, and the two sides are respectively connected to the adjacent wall frames (5) via the screws (32).

7. The method for constructing an assembled integral wall for a rail transit building according to claim 1, characterized in that: In step 4, a hole reinforcement member (6) is installed on the frame of the hole (4).

8. The method for constructing an assembled integral wall for a rail transit building according to claim 1, characterized in that: In step 4, when the distance between the upper edge of the opening (4) and the bottom of the structural beam or the bottom of the slab is greater than or equal to 400 mm, a corner reinforcement piece (7) is obliquely provided at the corner of the opening (4).

9. The method for constructing an assembled integral wall for a rail transit building according to claim 1, characterized in that: In step 4, when the distance between the upper edge of the opening (4) and the bottom of the structural beam or the bottom of the slab is greater than or equal to 500 mm, a hanger bar (8) needs to be provided above the opening (4).

10. The method for constructing an assembled integral wall for a rail transit building according to claim 1, characterized in that: Both sides of the hole (4) need to be filled, and the filling width of both sides is not less than 100 mm. When there is less than one cavity, the adjacent cavity needs to be filled.

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