Basement exterior wall post-cast strip construction technology

Abstract

The invention relates to the field of building construction, in particular to a basement exterior wall post-cast strip construction technology which comprises a post-cast strip located on a basement exterior wall and comprises the steps that S1, a first sealing plate is arranged on the post-cast strip; s2, construction is conducted on the first sealing plate, and construction comprises waterproof construction, heat preservation construction and waterproof wall construction; s3, earthwork backfilling is conducted after construction is completed; s4, a second sealing plate is arranged on the face, away from the first sealing plate, of the post-cast strip; according to the construction method, the first sealing plate is arranged, so that waterproof construction, heat preservation construction, waterproof wall construction and earthwork backfilling operation are preposed, and construction operation can still be conducted under the condition that the post-cast strip does not need to be poured in advance; the situation that in traditional operation, the next step of construction operation can be carried out after the post-cast strip is formed and disassembled is avoided, the construction efficiency is improved, and the construction period is shortened.

Description

Technical Field

[0001] The present invention relates to the field of building construction, and particularly to a construction process for post-cast strips of basement exterior walls. Background Art

[0002] In deep foundation pit projects using retaining piles and steel bracing systems, the basement structure is usually constructed in a bottom-up sequence. For a two-story basement, in the conventional process, after the foundation slab, the negative second floor, and the negative first floor structures are successively constructed, the above-ground structure construction continues until the main structure is capped, and after the earthwork backfilling outside the side wall is completed, the steel bracing can be removed.

[0003] Since the steel bracing plays a key horizontal support role during the foundation pit excavation and cannot be removed before the structure is closed and backfilled, its retention time runs through the entire process of underground structure construction and even above-ground structure construction. This construction sequence results in the steel bracing occupying the foundation pit space for a long time, seriously restricting the overall progress of the structure construction. Summary of the Invention

[0004] The purpose of the present invention is to overcome the deficiency in the prior art that when building a basement by using a traditional method with retaining piles and steel bracing, earthwork backfilling can only be carried out after the post-cast strip is poured, and the formwork of the post-cast strip can only be removed when it reaches the condition of being demoldable, resulting in delays in the entire construction period, and to provide a construction process for post-cast strips of basement exterior walls.

[0005] In a first aspect, the present invention provides a construction process for post-cast strips of basement exterior walls, including post-cast strips located on the basement exterior walls, and the construction process includes:

[0006] S1. Set a first sealing plate in the post-cast strip;

[0007] S2. Carry out construction on the first sealing plate, where the construction includes waterproof construction, thermal insulation construction, and waterproof wall construction;

[0008] S3. Carry out earthwork backfilling after the construction is completed;

[0009] S4. Set a second sealing plate on the side of the post-cast strip away from the first sealing plate;

[0010] S5. Fill the post-cast strip with concrete.

[0011] The present invention provides a construction process for the post-cast strip of the basement exterior wall. By first setting a first sealing plate at the post-cast strip to seal one side of the post-cast strip, and successively completing waterproof construction, thermal insulation construction, and waterproof wall construction on the basis of the first sealing plate, then carrying out earth backfilling, and setting a second sealing plate for construction on the other side of the post-cast strip after the earth backfilling, the entire post-cast strip forms a cavity through the first sealing plate and the second sealing plate, and then concrete is poured into the cavity. Compared with the traditional construction method of using a retaining shape and steel supports to build the basement, where earth backfilling can only be carried out after the post-cast strip is poured, and the formwork of the post-cast strip can only be removed when it reaches the condition of being demoldable, in the present invention, the first sealing plate is used in advance to seal one side of the post-cast strip, and relevant construction and earth backfilling are completed, so that it no longer depends on the strength development of the post-cast strip concrete and formwork removal as the precondition for backfilling operations. By setting the first sealing plate, waterproof construction, thermal insulation construction, waterproof wall construction, and earth backfilling operations are advanced. Without the need to pour the post-cast strip in advance, construction operations can still be carried out, avoiding the need to wait for the post-cast strip to be formed and demolded in traditional operations before the next construction operation can be carried out, improving the construction efficiency and shortening the construction period.

[0012] Preferably, in S1, before setting the first sealing plate at the post-cast strip, the post-cast strip is pre-treated;

[0013] The pre-treatment of the post-cast strip includes:

[0014] Cleaning the garbage and draining the accumulated water in the post-cast strip;

[0015] Repairing the surface of the post-cast strip;

[0016] Roughening the surface of the post-cast strip.

[0017] Preferably, the steps of S1 include:

[0018] Determine the size of the post-cast strip and prefabricate the first sealing plate according to the size of the post-cast strip;

[0019] Prefabricate a support member, place the support member horizontally, with one end of the support member abutted against the basement retaining structure and the other end abutted against the side of the first sealing plate away from the post-cast strip, and temporarily support the first sealing plate through the support member;

[0020] Weld the first sealing plate and the steel bars in the post-cast strip;

[0021] After welding is completed, remove the support member.

[0022] Preferably, the support member includes a wooden square and a jack. The jack is threadedly connected to one end of the wooden square. One end of the wooden square with the jack is abutted against the first sealing plate, and the other end of the wooden square away from the jack is abutted against the basement enclosure structure.

[0023] Preferably, in the step S2, the waterproof construction includes:

[0024] A coating is provided on the first sealing plate;

[0025] Then a waterproof coiled material is provided on the coating;

[0026] Quality inspection is carried out on the waterproof construction, and after passing, thermal insulation construction is carried out.

[0027] Preferably, in the step S2, the thermal insulation construction is specifically laying thermal insulation boards.

[0028] Preferably, in the step S2, the protective wall construction is carried out using waterproof protective bricks, and the verticality of the protective wall is less than or equal to 5 mm, and the gap between two adjacent waterproof protective bricks is 8 mm - 12 mm.

[0029] Preferably, in the step S3, the earth backfilling adopts a layered backfilling method, with each layer thickness less than 300 mm and a plate vibrator is used to compact each layer of earth.

[0030] Preferably, in the step S4, specifically including: setting a second sealing plate on the side of the post-cast strip away from the first sealing plate

[0031] The second sealing plate is prefabricated according to the size of the side of the post-cast strip away from the first sealing plate;

[0032] A tie rod is provided at one end of the second sealing plate facing the post-cast strip, and the second sealing plate is welded to the steel bars in the post-cast strip through the tie rod.

[0033] Preferably, in the step S5, before pouring concrete into the post-cast strip, the concrete is proportioned. The concrete is composed of cement, fly ash, expansion agent, water, sand, gravel and polycarboxylate-based water reducer.

[0034] Preferably, in the concrete poured into the post-cast strip, the proportion of each substance is as follows: cement accounts for 11.7%, fly ash accounts for 3.9%, expansion agent accounts for 1.64%, water accounts for 6.55%, sand accounts for 29.24%, gravel accounts for 46.78%, and polycarboxylate-based water reducer accounts for 0.2%. Among them, the diameter of the gravel is 5 mm - 20 mm.

[0035] Compared with the prior art, the beneficial effects of the present invention:

[0036] 1. The present invention provides a construction process for the post-cast strip of the basement exterior wall. By first setting a first sealing plate at the post-cast strip to seal one side of the post-cast strip, and successively completing waterproof construction, thermal insulation construction, and waterproof wall construction on the basis of the first sealing plate, then carrying out earthwork backfilling, and setting a second sealing plate for the construction on the other side of the post-cast strip after the earthwork backfilling. The first sealing plate and the second sealing plate form a cavity for the entire post-cast strip, and then concrete is poured into the cavity. Compared with the traditional construction method of using a surrounding shape with steel supports to build the basement, where earthwork backfilling can only be carried out after the post-cast strip is poured, and the formwork of the post-cast strip can only be removed when it reaches the condition of being demoldable. In the present invention, the first sealing plate is used in advance to seal one side of the post-cast strip, and relevant construction and earthwork backfilling are completed, thus no longer relying on the strength development of the post-cast strip concrete and formwork removal as the precondition for backfilling operations. By setting the first sealing plate, waterproof construction, thermal insulation construction, waterproof wall construction, and earthwork backfilling operations are advanced. Without the need to pour the post-cast strip in advance, construction operations can still be carried out, avoiding the need to wait for the post-cast strip to be formed and demolded in traditional operations before the next construction operation can be carried out, improving construction efficiency and shortening the construction period. BRIEF DESCRIPTION OF THE DRAWINGS

[0037] Figure 1 is a flow chart of the construction process for the post-cast strip of the basement exterior wall in the present invention;

[0038] Figure 2 is a position relationship diagram of the post-cast strip and the basement exterior wall in the present invention;

[0039] Figure 3 is a connection relationship diagram of the first sealing plate and the basement enclosure structure in the present invention;

[0040] Figure 4 is a connection diagram of the first sealing plate and the post-cast strip in the present invention;

[0041] Figure 5 is a schematic structural diagram of the post-cast strip after waterproof construction in the present invention;

[0042] Figure 6 is a schematic structural diagram of the post-cast strip after thermal insulation construction in the present invention;

[0043] Figure 7 is a schematic structural diagram of the post-cast strip after constructing the protective wall in the present invention.

[0044] Markings in the figure: 1 - post-cast strip; 2 - first sealing plate; 21 - connecting bars; 3 - second sealing plate; 31 - tie rods; 4 - support members; 41 - wooden planks; 42 - jacks; 5 - coating; 6 - waterproof coiled material; 7 - thermal insulation board; 8 - protective wall. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0045] The present invention will be further described in detail below in conjunction with specific embodiments. However, this should not be construed as limiting the scope of the above-mentioned subject matter of the present invention to the following embodiments. Any technology implemented based on the content of the present invention belongs to the scope of the present invention.

[0046] Unless otherwise specified, in the description of the specific embodiments of the present invention, the terms indicating the orientation or positional relationship such as "upper", "lower", "left", "right", "center", "inner", "outer", etc. are all expressions based on the orientation or positional relationship shown in the drawings, or the orientation or positional relationship when the invention product / device / equipment is normally used and placed. These terms of orientation or positional relationship are only for the convenience of describing the solution of the present invention or simplifying the description in the specific embodiments, so as to facilitate technicians to quickly understand the solution, rather than indicating or implying that a specific device / component / element must have a specific orientation or be constructed and operated in a specific positional relationship. Therefore, it should not be construed as a limitation to the present invention.

[0047] In addition, when terms such as "horizontal", "vertical", "hanging", "parallel" appear, it does not mean that the corresponding device / component / element is required to be absolutely horizontal or vertical or hanging or parallel, but it can be slightly inclined or have a deviation. For example, "horizontal" only means that its direction is more horizontal relative to "vertical", and does not mean that the structure must be completely horizontal, but it can be slightly inclined. Or, it can be simply understood that the corresponding device / component / element is arranged in the directions of "horizontal", "vertical", "hanging", "parallel", etc., and can have an error / deviation of ±10% relative to the corresponding direction setting, more preferably within ±8%, more preferably within ±6%, more preferably within ±5%, more preferably within ±4%. As long as the corresponding device / component / element is within the error / deviation range, it can still play its role in the solution of the present invention.

[0048] In addition, when expressions such as "first", "second", "third", etc. appear in the terms, they are only used to distinguish the description of the same or similar components, and should not be construed as emphasizing or implying the relative importance of specific components.

[0049] In addition, in the description of the embodiments of the present invention, "several", "multiple", "a number of" represent at least 2. It can be any situation such as 2, 3, 4, 5, 6, 7, 8, 9, etc., and even can be a situation of more than 9.

[0050] In addition, in the description of the technical solution of the present invention, unless otherwise clearly specified / defined / restricted, the terms "set", "installed", "connected", "linked", "provided with", "laid", "arranged" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection. It can be connection means commonly used in the art such as welding, riveting, bolting, and threaded connection. Such a connection can be a mechanical connection, an electrical connection, or a communication connection; it can be directly connected, or indirectly connected through an intermediate medium, and can be the communication inside two components.

[0051] Example 1

[0052] A construction process for the post-cast strip 1 of the basement exterior wall specifically includes:

[0053] First step: Set a first sealing plate 2 at one end of the post-cast strip 1 facing the water-facing surface of the basement exterior wall, and seal this surface of the post-cast strip 1 through the first sealing plate 2;

[0054] Second step: Perform waterproof construction, thermal insulation construction, and protection wall 8 construction in sequence on the side of the first sealing plate 2 away from the post-cast strip 1;

[0055] Third step: After the waterproof construction, thermal insulation construction, and protection wall 8 construction are completed, start the earth backfilling. This earth backfilling is carried out manually to avoid extrusion of the first sealing plate 2;

[0056] Fourth step: Set a second sealing plate 3 at one end of the post-cast strip 1 away from the water-facing surface of the basement exterior wall, and cooperate the second sealing plate 3 with the first sealing plate 2 to make the entire post-cast strip 1 form a cavity, which is convenient for subsequent concrete pouring of the post-cast strip 1;

[0057] Fifth step: Configure the concrete, and perform concrete pouring after the configuration is completed.

[0058] In this application, the first sealing plate 2 is set on the side of the basement exterior wall facing the basement enclosure structure.

[0059] In one or several embodiments, before setting the first sealing plate 2 on the post-cast strip 1, pre-treat the post-cast strip 1;

[0060] The pre-treatment of the post-cast strip 1 includes:

[0061] Clean the garbage and drain the accumulated water in the post-cast strip 1;

[0062] Perform surface repair on the post-cast strip 1;

[0063] Perform roughening treatment on the post-cast strip 1;

[0064] Further, clean the garbage and drain the accumulated water in the post-cast strip 1, including removing sundries (such as wood chips, steel bar heads, concrete fragments, etc.) within the scope of the post-cast strip 1 and draining the accumulated water in the post-cast strip 1. Subsequently, use a high-pressure water gun to wash the base layer of the post-cast strip 1 to ensure that there is no oil stain, floating slurry and loose particles in the post-cast strip 1;

[0065] Further, perform surface repair on the post-cast strip 1, including detecting whether there are cracks and honeycomb surfaces at the edge of the post-cast strip 1. If there are cracks and honeycomb surfaces, repair them. This step ensures that the post-cast strip 1 is dry and free of oil stains, and ensures that the flatness deviation of the surface is less than or equal to 5 mm;

[0066] Further, the chiseling treatment of the post-cast strip 1 is specifically as follows: use an electric chiseling machine or a manual chisel to chisel the concrete joint surface between the post-cast strip 1 and the basement exterior wall. The chiseling depth is 3-5 mm. Subsequently, clean the debris generated by chiseling and blow the dust clean with compressed air to ensure that the chiseled surface is uniformly rough and there is no smooth area, and the dust residue in the post-cast strip 1 is less than or equal to 1 mm.

[0067] In one or several embodiments, the specific steps of setting the first sealing plate 2 at one end of the post-cast strip 1 facing the water-facing surface of the basement exterior wall include;

[0068] Determine the size of the post-cast strip 1 and prefabricate the first sealing plate 2 according to the size of the post-cast strip 1;

[0069] Prefabricate the support member 4, place the support member 4 horizontally, and one end of the support member 4 abuts against the basement enclosure structure, and the other end abuts against the side of the first sealing plate 2 away from the post-cast strip 1, and temporarily support the first sealing plate 2 through the support member 4;

[0070] Weld the first sealing plate 2 and the steel bars in the post-cast strip 1;

[0071] After welding, remove the support member 4;

[0072] Further, when prefabricating the first sealing plate 2, polish the edge of the first sealing plate 2 smoothly;

[0073] Further, the first sealing plate 2 and the steel bars in the post-cast strip 1 are connected by connecting bars 21. Both ends of the connecting bars 21 are bent. One bent end of the connecting bar 21 is welded to the first sealing plate 2, and the other bent end is welded to the steel bars in the post-cast strip 1;

[0074] Preferably, the connecting bars 21, the first sealing plate 2 and the steel bars in the post-cast strip 1 are all connected by welding electrodes. The welding electrodes are E50 series welding electrodes, the weld height ≥ 3 mm. The connecting bars 21 are made of HRB400E 10 steel bars. One end is bent by 10 cm and fully welded to the first sealing plate 2, and the other end is bent by 10 cm and welded and fixed to the steel bars in the post-cast strip 1. Among them, the connecting bars 21 are arranged at intervals of 400 cm vertically and 3 are arranged horizontally for welding to ensure the installation stability of the first sealing plate 2. After welding, the welding slag is removed, and antirust paint (red lead paint or zinc-rich epoxy primer) is applied. Check the weld quality, and use penetrant testing or hammering method to detect no missed welding or slag inclusion.

[0075] In one or several embodiments, the support member 4 includes a wooden square 41 and a jack 42. The jack 42 is threadedly connected to one end of the wooden square 41. One end of the wooden square 41 with the jack 42 is abutted against the first sealing plate 2, and the other end of the wooden square 41 away from the jack 42 is abutted against the basement retaining structure.

[0076] In one or several embodiments, the waterproof construction includes: setting a coating 5 on the first sealing plate 2, and then setting a waterproof coiled material 6 on the coating 5. After the waterproof construction is quality-tested and qualified, the thermal insulation construction is carried out. Specifically, first, epoxy resin is coated on the outer surface of the first sealing plate 2 to increase the adhesion of the subsequent waterproof layer connection. Then, the coating 5 is laid. The coating 5 is a polymer cement waterproof coating. After the coating is dried, the waterproof coiled material 6 is laid. The waterproof coiled material 6 is a high-molecular TPO self-adhesive waterproof coiled material 6.

[0077] In one or several embodiments, the thermal insulation construction is specifically laying a thermal insulation board 7, specifically using an XPS extruded board as the thermal insulation board 7.

[0078] In one or several embodiments, the protective wall 8 is constructed using waterproof protective bricks, and the verticality of the protective wall 8 is less than or equal to 5 mm, and the gap between two adjacent waterproof protective bricks is 8 mm - 12 mm.

[0079] In one or several embodiments, the earthwork backfilling adopts a layered backfilling method, with each layer thickness less than 300 mm and a plate vibrator is used to compact each layer of earthwork.

[0080] In one or several embodiments, setting a second sealing plate 3 on the side of the post-cast strip 1 away from the first sealing plate 2 specifically includes:

[0081] Pre-fabricating the second sealing plate 3 according to the size of the side of the post-cast strip 1 away from the first sealing plate 2;

[0082] A tie rod 31 is provided at one end of the second sealing plate 3 facing the post-cast strip 1, and the second sealing plate 3 is welded to the steel bars in the post-cast strip 1 through the tie rod 31.

[0083] In one or several embodiments, before the concrete is poured into the post-cast strip 1, the concrete is proportioned, and the concrete is composed of cement, fly ash, expansion agent, water, sand, gravel and polycarboxylate superplasticizer;

[0084] Further, in the concrete poured into the post-cast strip 1, the proportion of each substance is as follows: the proportion of cement is 11.7%, the proportion of fly ash is 3.9%, the proportion of expansion agent is 1.64%, the proportion of water is 6.55%, the proportion of sand is 29.24%, the proportion of gravel is 46.78%, and the proportion of polycarboxylate superplasticizer is 0.2%. Among them, the diameter of the gravel is 5 mm - 20 mm.

[0085] This application Figure 5 The blank space between the first sealing plate 2, the coating 5 and the waterproof coiled material 6 in this application is the adhesive layer.

[0086] The above are only the preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent replacements, and improvements made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A construction process for post-cast strips on basement exterior walls, characterized in that: It includes a post-cast strip (1) located on the exterior wall of the basement, and the construction process includes: S1. Set a first sealing plate (2) in the post-cast strip (1); S2. Conduct construction on the first sealing plate (2), where the construction includes waterproof construction, thermal insulation construction, and a construction protection wall (8); S3. Backfill the soil after the construction is completed; S4. Set a second sealing plate (3) on the side of the post-cast strip (1) away from the first sealing plate (2); S5. Fill the post-cast strip (1) with concrete.

2. The construction process of the post-cast strip for the basement exterior wall according to claim 1, characterized in that, In S1, before setting the first sealing plate (2) in the post-cast strip (1), pre-treat the post-cast strip (1); The pre-treatment of the post-cast strip (1) includes: Clean the garbage and drain the accumulated water in the post-cast strip (1); Repair the surface of the post-cast strip (1); Roughen the surface of the post-cast strip (1).

3. The construction process of the post-cast strip for the basement exterior wall according to claim 1, characterized in that, The S1 step includes: Determine the size of the post-cast strip (1) and prefabricate the first sealing plate (2) according to the size of the post-cast strip (1); Prefabricate a support member (4), place the support member (4) horizontally, with one end of the support member (4) abutted against the basement enclosure structure and the other end abutted against the side of the first sealing plate (2) away from the post-cast strip (1), and temporarily support the first sealing plate (2) through the support member (4); Weld the first sealing plate (2) to the steel bars in the post-cast strip (1); After the welding is completed, remove the support member (4).

4. A construction process for post-cast strip of basement exterior wall according to claim 3, characterized in that, The support member (4) includes a wooden square (41) and a jack (42). Connect the jack (42) to one end of the wooden square (41) by threading, abut the end of the wooden square (41) with the jack (42) against the first sealing plate (2), and abut the end of the wooden square (41) away from the jack (42) against the basement enclosure structure.

5. The construction process of the post-cast strip for the basement exterior wall according to claim 1 is characterized in that, In the S2 step, the waterproof construction includes: Set a coating (5) on the first sealing plate (2); Then set a waterproof coiled material (6) on the coating (5); Conduct quality inspection on the waterproof construction, and conduct thermal insulation construction after passing the inspection.

6. The construction process of the post-cast strip for the basement exterior wall according to claim 1 is characterized in that, In the S2 step, the thermal insulation construction is specifically laying a thermal insulation board (7).

7. A construction process for the post-cast strip of the basement exterior wall according to claim 1, characterized in that, In the S2 step, the protection wall (8) is constructed with waterproof protection bricks, and the verticality of the protection wall (8) is less than or equal to 5 mm, and the gap between two adjacent waterproof protection bricks is 8 mm - 12 mm.

8. The construction process of the post-cast strip for the basement exterior wall according to claim 1, characterized in that, In the S3 step, the soil backfilling adopts a layered backfilling method, with each layer thickness less than 300 mm, and a plate vibrator is used to compact each layer of soil.

9. A construction process for post-cast strip of basement exterior wall according to claim 1, characterized in that, In the S4 step, setting the second sealing plate (3) on the side of the post-cast strip (1) away from the first sealing plate (2) specifically includes: Prefabricate the second sealing plate (3) according to the size of the side of the post-cast strip (1) away from the first sealing plate (2); A tie rod (31) is provided at one end of the second sealing plate (3) facing the post-cast strip (1), and the second sealing plate (3) is welded to the steel bars in the post-cast strip (1) through the tie rod (31).

10. A construction process for the post-cast strip of the basement exterior wall according to any one of claims 1-9, characterized in that In the step S5, before pouring concrete into the post-cast strip (1), the concrete is proportioned, and the concrete is composed of cement, fly ash, expansion agent, water, sand, gravel and polycarboxylate superplasticizer.

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