Basement exterior wall post-cast strip rapid sealing structure

Abstract

The utility model provides a basement outer wall post-cast strip rapid sealing structure which comprises a post-cast strip arranged between adjacent underground structure outer walls, a first steel bar between the adjacent underground structure outer walls penetrates through the post-cast strip, a prefabricated plate is arranged on the outer side of the post-cast strip, a second steel bar is arranged in the prefabricated plate, and a plurality of reinforcing steel bars are arranged in the second steel bar. The second reinforcing steel bars and the first reinforcing steel bars are connected through Z-shaped reinforcing steel bars, and a waterproof unit is arranged between the prefabricated slab and the underground structure outer wall. The precast slab is tightly connected with the underground structure outer wall through a plurality of Z-shaped steel bars, so that the condition that the forming quality of the post-cast strip is influenced by collapse or crack of the precast slab due to the influence of concrete pressure when the post-cast strip is cast is prevented; the prefabricated slab is easy and convenient to manufacture, convenient and fast to mount and dismount and easy to operate, construction efficiency is improved, and meanwhile field basement backfilling and follow-up main body construction organization are facilitated.

Description

Technical Field

[0001] The utility model belongs to the technical field of post-cast strip construction for exterior walls, and specifically relates to a rapid closing structure for post-cast strips of basement exterior walls. Background Art

[0002] Post-cast strips in basements are widely used in the field of construction engineering. The pouring time of post-cast strips is generally not less than 45 days, which severely restricts the backfilling time of the side wall foundation pits, bringing great difficulties to the safe and civilized construction of the construction site and the subsequent main structure construction. The traditional closing of basement post-cast strips is prone to water seepage and leakage, and it is easy to cause honeycombing on the concrete surface. It requires a large amount of labor, has a long construction time, and improper interspersed subsequent processes.

[0003] For example, a post-cast strip structure for basement exterior walls disclosed in a Chinese utility model patent with the authorization announcement number CN208934012U includes basement walls, a water stop plate, and a post-cast strip located on both sides of the post-cast strip area; a waterproof additional layer is provided on the outer side of the basement wall, corresponding to the post-cast strip area; one end of the waterproof additional layer is attached to the outer side surface of the basement wall on one side of the post-cast strip area, and the other end of the waterproof additional layer is attached to the outer side surface of the basement wall on the other side of the post-cast strip area; a retaining wall is built closely outside the waterproof additional layer; there are two water stop plates, which are respectively arranged vertically and longitudinally on both sides of the post-cast strip area; an inner partition net and an outer partition net are respectively attached to the side surfaces of the two basement walls close to the post-cast strip area, and the inner partition net and the outer partition net are respectively located inside and outside the water stop plate; the post-cast strip is poured between the two basement walls.

[0004] In the above-mentioned prior art, the problem of water seepage and leakage caused by the lag of earth backfilling at the traditional post-cast strip structure is avoided. However, when the post-cast strip is poured, the retaining wall is easily collapsed or cracked under the influence of concrete pressure, affecting the forming quality of the post-cast strip.

[0005] Therefore, how to effectively solve the problem that when the post-cast strip is poured, the retaining wall is easily collapsed or cracked under the influence of concrete pressure, affecting the forming quality of the post-cast strip is a technical problem to be solved urgently. Summary of the Utility Model

[0006] In view of the deficiencies in the above background art, the present utility model proposes a rapid closing structure for post-cast strips of basement exterior walls, which solves the problem that when the post-cast strip is poured, the retaining wall is easily collapsed or cracked under the influence of concrete pressure, affecting the forming quality of the post-cast strip.

[0007] The technical solution of this application is as follows:

[0008] A rapid closing structure for the post-cast strip of the basement exterior wall, including a post-cast strip arranged between adjacent basement structure exterior walls. The steel bar one between the adjacent basement structure exterior walls passes through the post-cast strip. A precast slab is arranged outside the post-cast strip. Steel bar two is arranged in the precast slab. The steel bar two is connected with the steel bar one through a Z-shaped steel bar. A waterproof unit is arranged between the precast slab and the basement structure exterior wall. The precast slab and the basement structure exterior wall are tightly connected by a number of Z-shaped steel bars, preventing the precast slab from collapsing or cracking under the influence of concrete pressure during the casting of the post-cast strip, which affects the forming quality of the post-cast strip. The production process of the precast slab is simple, the installation and demolition are convenient and fast, the operation is simple, improving the construction efficiency while facilitating the on-site backfilling of the basement and the subsequent main body construction organization.

[0009] Further, the Z-shaped steel bar includes an upper wing and a lower wing. The lower surface of the upper wing is connected with the steel bar two, and the upper surface of the lower wing is connected with the steel bar one, which is convenient and fast, the operation is simple, effectively connecting the basement structure exterior wall and the post-cast strip tightly, and facilitating demolition at the same time.

[0010] Further, a number of Z-shaped steel bars are arranged along both the width direction and the length direction of the precast slab, strengthening the stability and firmness of the connection between the basement structure exterior wall and the post-cast strip, and preventing the precast slab from shifting.

[0011] Further, the steel bar two is in a mesh shape, strengthening the supporting effect of the precast slab.

[0012] Further, the waterproof unit includes waterproof mortar structures arranged on both sides of the precast slab. The cross-section of the waterproof mortar structure is a right triangle, and the right-angle sides of the waterproof mortar structure are respectively attached to the precast slab and the basement structure exterior wall.

[0013] Further, waterproof layers are arranged on the outer surfaces of the precast slab, the basement structure exterior wall, and the waterproof mortar structure, which not only meets the waterproof requirements of the basement post-cast strip but also can greatly reduce the risk of water leakage.

[0014] Further, at least two layers of waterproof layers are arranged.

[0015] Further, a water stop is embedded in the basement structure exterior wall, and one end of the water stop extends out of the basement structure exterior wall.

[0016] Further, a lifting hook protruding from the outer surface of the precast slab is connected to the steel bar two, which is convenient for the installation, disassembly, and transportation of the precast slab.

[0017] Further, a roughened surface is arranged on the contact surface between the basement structure exterior wall and the precast slab, increasing the friction force and helping with the connection to the precast slab.

[0018] The specific beneficial effects of the present utility model include:

[0019] 1. The precast slab and the external wall of the underground structure are tightly connected by a number of Z-shaped steel bars, preventing the precast slab from collapsing or cracking under the influence of concrete pressure during the casting of the post-cast strip, and affecting the forming quality of the post-cast strip.

[0020] 2. The production process of the precast slab is simple, and the installation and demolition are convenient and fast, with simple operation, improving the construction efficiency while facilitating the backfilling of the basement on-site and the subsequent construction organization of the main body.

[0021] 3. The precast slab can be re-integrated from the leftover materials cut from the formwork of the main structure, and the production model of the precast slab can be realized without using new materials, making full use of the existing materials, reducing the generation of construction waste, meeting the requirements of green, energy-saving and low-carbon construction, and saving costs.

[0022] 4. At the stepped joint between the precast slab and the external wall of the underground structure, not only a waterproof mortar structural chamfer is set, but also no less than two layers of waterproof layers are synchronously added, which not only meets the waterproof requirements of the basement post-cast strip, but also greatly reduces the leakage risk. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] In order to more clearly illustrate the embodiments of the present utility model, the drawings required for the description of the embodiments will be briefly introduced below. Obviously, the drawings in the following description are only some embodiments of the present utility model, and those of ordinary skill in the art can obtain other drawings based on these drawings without creative efforts.

[0024] Figure 1 It is a schematic diagram of the usage state of the present utility model;

[0025] Figure 2 is Figure 1 the enlarged view of part A in

[0026] Figure 3 is Figure 1 the enlarged view of part B in

[0027] Figure 4 It is the side view of the precast slab in the present utility model;

[0028] Figure 5 It is the top view of the precast slab in the present utility model.

[0029] Description of the reference numerals in the drawings:

[0030] 1. External wall of the underground structure; 2. Post-cast strip; 3. Precast slab;

[0031] 4. Waterproof mortar structure; 5. Waterproof layer; 6. Z-shaped steel bar;

[0032] 7. Steel bar 1; 8. Water stop piece; 9. Steel bar 2;

[0033] 10. Hook. Detailed implementation manners

[0034] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0035] A rapid closing structure for the post-cast strip of the basement exterior wall, as Figure 1 shown, includes a post-cast strip 2 arranged between the basement structure exterior walls 1. A steel bar 1 is arranged in the post-cast strip 2. A precast slab 3 is arranged outside the post-cast strip 2. A steel bar 2 is arranged in the precast slab 3. The steel bar 2 and the steel bar 1 are connected by a Z-shaped steel bar 6. A waterproof unit is arranged between the precast slab 3 and the basement structure exterior wall 1. The precast slab 3 and the basement structure exterior wall 1 are tightly connected by a plurality of Z-shaped steel bars 6, preventing the precast slab 3 from collapsing or cracking under the influence of the concrete pressure during the pouring of the post-cast strip, affecting the forming quality of the post-cast strip 2. The production process of the precast slab 3 is simple, the installation and demolition are convenient and fast, the operation is simple, improving the construction efficiency, and facilitating the backfilling of the basement on site and the subsequent main construction organization.

[0036] Specifically, the precast slab 3 can be arranged at the top or side of the post-cast strip 2.

[0037] On the basis of the above implementation manner, as a preferred implementation manner, as Figure 2 shown, the Z-shaped steel bar 6 includes an upper wing and a lower wing. The lower surface of the upper wing is connected to the steel bar 2, and the upper surface of the lower wing is connected to the steel bar 1.

[0038] Specifically, the upper wing is tied and connected to the steel bar 2, the lower wing of the Z-shaped steel bar 6 is inserted into the steel bar 1, and then the lower wing is tied and connected to the steel bar 1. It is convenient and fast, the operation is simple, effectively connecting the basement structure exterior wall 1 and the post-cast strip 2 tightly, and at the same time facilitating demolition. The connection part of the lower wing and the steel bar 1 does not need to be demolished, only the connection between the upper wing and the steel bar 2 needs to be demolished. The Z-shaped steel bar 6 extending out of the post-cast strip 2 is connected to the basement structure in the subsequent construction, facilitating the later construction.

[0039] On the basis of the above - mentioned embodiments, as a preferred embodiment, a plurality of Z - shaped steel bars 6 are arranged along both the width direction and the length direction of the precast slab 3, and a Z - shaped steel bar 6 is arranged at an interval, which strengthens the stability and firmness of the connection between the underground structure outer wall 1 and the post - casting belt 2 and prevents the precast slab 3 from shifting.

[0040] On the basis of the above - mentioned embodiments, as a preferred embodiment, as Figure 5 shown, the second steel bar 9 is in a mesh shape, with horizontal and vertical steel bars intertwined, significantly improving the firmness of the precast slab 3.

[0041] Preferably, the second steel bar 9 is made of steel bars with a diameter of 14@150, and the mesh - shaped second steel bar 9 strengthens the supporting effect of the precast slab 3.

[0042] On the basis of the above - mentioned embodiments, as a preferred embodiment, as Figure 3 shown, the waterproof unit includes waterproof mortar structures 4 arranged on both sides of the precast slab 3. The cross - section of the waterproof mortar structure 4 is a right - angled triangle, and the right - angled sides of the waterproof mortar structure 4 are respectively attached to the precast slab 3 and the underground structure outer wall 1. The waterproof mortar structure 4 forms a chamfer, filling the stepped area formed between the precast slab 3 and the underground structure outer wall 1.

[0043] On the basis of the above - mentioned embodiments, as a preferred embodiment, a waterproof layer 5 is provided on the outer surfaces of the precast slab 3, the underground structure outer wall 1, and the waterproof mortar structure 4, which not only meets the waterproof requirements of the basement post - casting belt but also can greatly reduce the risk of water leakage.

[0044] On the basis of the above - mentioned embodiments, as a preferred embodiment, the waterproof layer 5 is provided with at least two layers.

[0045] On the basis of the above - mentioned embodiments, as a preferred embodiment, a water - stop member 8 is embedded in the underground structure outer wall 1, and one end of the water - stop member 8 extends out of the underground structure outer wall 1.

[0046] On the basis of the above - mentioned embodiments, as a preferred embodiment, as Figure 4 、 Figure 5 shown, a hook 10 protruding from the outer surface of the precast slab 3 is connected to the second steel bar 9, which facilitates the installation, disassembly, and transportation of the precast slab 3.

[0047] On the basis of the above - mentioned embodiments, as a preferred embodiment, the contact surface between the underground structure outer wall 1 and the precast slab 3 is provided with a roughened surface, which increases the friction force and helps with the connection to the precast slab 3.

[0048] The usage steps of the present utility model are as follows:

[0049] 1. Use the concrete tailings during the casting process of the main structure to fabricate the precast slab 3. To ensure that the precast slab 3 has sufficient strength during the later backfilling, single-layer bidirectional steel bars with a diameter of 14@150 are arranged inside, and at the same time, Z-shaped steel bars 6 that need to be connected to the steel bars -7 in the post-cast strip 2 are reserved.

[0050] 2. Before casting the underground structure outer wall 1, water stop members 8 are buried in the middle of the underground structure outer wall 1 on both sides of the post-cast strip 2 respectively.

[0051] 3. After the casting of the underground structure outer wall 1 is completed, roughening treatment is promptly carried out on the underground structure outer wall 1 on both sides of the post-cast strip 2.

[0052] 4. Lift the precast slab 3 by the lifting hook 10, hoist the precast slab 3 to the area of the post-cast strip 2, and insert and bind the lower wing of the reserved Z-shaped steel bar 6 with the steel bar -7 in the post-cast strip 2.

[0053] 5. Fill the waterproof mortar structure 4 at the stepped joint formed at the overlapping position between the precast slab 3 and the underground structure outer wall 1.

[0054] 6. Successively make a waterproof layer 5 with a lap width of 250 mm at the waterproof mortar structure 4, and two layers of the waterproof layer 5 are provided.

[0055] 7. Cast the post-cast strip 2, and the precast slab 3 and the post-cast strip 2 form an integral body, achieving the purpose of early backfilling and waterproofing of the basement.

[0056] The details not elaborated in the present utility model are all well-known conventional technical means in the art.

[0057] The above content shows and describes the basic principle, main features and beneficial effects of the present utility model. The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present utility model shall be included within the protection scope of the present utility model.

Claims

1. A rapid sealing structure for a post-cast strip of a basement exterior wall, characterized in that: The invention comprises a post-cast strip (2) arranged between adjacent underground structure outer walls (1), a steel bar (7) between adjacent underground structure outer walls (1) passes through the post-cast strip (2), a prefabricated plate (3) is arranged outside the post-cast strip (2), a steel bar (9) is arranged in the prefabricated plate (3), the steel bar (9) is connected to the steel bar (7) via a Z-shaped steel bar (6), and a waterproof unit is arranged between the prefabricated plate (3) and the underground structure outer wall (1).

2. The rapid sealing structure of the post-cast strip of the basement exterior wall according to claim 1 is characterized by: The Z-shaped steel bar (6) comprises an upper wing and a lower wing, the lower surface of the upper wing overlaps the second steel bar (9), and the upper surface of the lower wing overlaps the first steel bar (7).

3. The rapid sealing structure of the post-cast strip of the basement exterior wall according to claim 1 or 2 is characterized in that: A plurality of the Z-shaped steel bars (6) are arranged along the width direction and the length direction of the prefabricated plate (3).

4. The rapid sealing structure of the post-cast strip of the basement exterior wall according to claim 1 or 2, characterized in that: The second steel bar (9) is in a mesh shape.

5. The rapid sealing structure of the post-cast strip of the basement exterior wall according to claim 1 or 2, characterized in that: The waterproof unit comprises a waterproof mortar structure (4) arranged on both sides of the prefabricated panel (3); the cross section of the waterproof mortar structure (4) is a right-angled triangle; the right-angled sides of the waterproof mortar structure (4) are respectively in contact with the prefabricated panel (3) and the outer wall (1) of the underground structure.

6. The rapid sealing structure of the post-cast strip of the basement exterior wall according to claim 5 is characterized by: The outer surfaces of the prefabricated panels (3), the underground structure outer walls (1), and the waterproof mortar structure (4) are provided with waterproof layers (5).

7. The rapid sealing structure of the post-cast strip of the basement exterior wall according to claim 6 is characterized by: The waterproof layer (5) is provided with at least two layers.

8. The rapid sealing structure of the post-cast strip of the basement exterior wall according to any one of claims 1-2, 6-7, characterized in that: A water stop member (8) is pre-buried in the outer wall (1) of the underground structure, and one end of the water stop member (8) extends out of the outer wall (1) of the underground structure.

9. The rapid sealing structure of the post-cast strip of the basement exterior wall according to any one of claims 1-2, 6-7, characterized in that: The second steel bar (9) is connected to a hook (10) protruding from the outer surface of the prefabricated plate (3).

10. The rapid sealing structure of the post-cast strip of the basement exterior wall according to any one of claims 1-2, 6-7, characterized in that: The contact surface between the underground structure outer wall (1) and the prefabricated panel (3) is provided with a roughened surface.

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