Novel sealing structure for post-cast strip of basement exterior wall in narrow and small space

Abstract

The utility model relates to the technical field of civil engineering, in particular to a novel closed structure for a post-cast strip of a basement outer wall in a narrow space, which comprises an isosceles trapezoid precast slab, a basement outer wall arranged on one side of the isosceles trapezoid precast slab, an upper reinforcing bar arranged on one side of the basement outer wall, and a lower reinforcing bar arranged on one side of the upper reinforcing bar. Longitudinal steel bars are installed on one side of the lower-layer reinforcing bars, first fixing plates are arranged on the two sides of the longitudinal steel bars, second fixing plates are arranged on one sides of the first fixing plates, and third fixing plates are installed on one sides of the second fixing plates. The construction method has the beneficial effects that the novel sealing structure for the basement exterior wall post-cast strip in the narrow space is provided, and a basement exterior wall prefabricated cover plate advanced sealing non-dismantling system is developed, so that the basement exterior wall post-cast strip under a narrow working face is sealed in advance, and waterproofing of the basement exterior wall and synchronous construction of fertilizer groove backfilling and a main body structure are achieved; the construction period is shortened to a great extent, operation construction in a narrow environment is achieved, and the connection integrity with the post-cast strip is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of civil engineering, in particular to a novel closed structure of a post-cast strip of an outer wall of a basement in a narrow space. Background Art

[0002] With the rapid development of the construction industry, more and more high-rise and large buildings are springing up. According to the requirements of structural design and construction specifications, in order to prevent harmful cracks in large buildings due to uneven shrinkage or settlement of the reinforced concrete structure itself, it is necessary to leave concrete post-cast strips at the corresponding positions of the foundation slab, wall and beam. This results in the inability to carry out underground exterior wall waterproofing construction, fertilizer trough backfilling, etc. in time after the underground structure construction is completed. Continuous precipitation is required on site, which increases the cost of the project. At the same time, the long-term retention of the post-cast strips also poses certain safety hazards to the deep foundation pit.

[0003] In the prior art, the existing method for advanced water-stopping of the post-cast strip of the basement exterior wall is to prefabricate an L-shaped concrete slab on the outside of the post-cast strip, build the post-cast strip retaining wall, and add a water-stop strip on the inside.

[0004] However, in the above construction, not only are the construction technology and structure relatively complicated, but also the outer walls of the structures of most buildings are very narrow from the side walls of the foundation pit, and cannot provide an effective construction working surface. For this reason, the utility model proposes a new closed structure of the post-cast strip of the outer wall of a narrow space basement to solve the above problem. Utility Model Content

[0005] The utility model aims to provide a novel closed structure of a post-cast strip of an outer wall of a basement in a narrow space, so as to solve the problems raised in the above-mentioned background technology.

[0006] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a new closed structure of a post-cast strip of a basement exterior wall in a narrow space, comprising: an isosceles trapezoidal prefabricated plate, a basement exterior wall is arranged on one side of the isosceles trapezoidal prefabricated plate, an upper layer of reinforcement is installed on one side of the basement exterior wall, a lower layer of reinforcement is arranged on one side of the upper layer of reinforcement, and a longitudinal steel bar is installed on one side of the lower layer of reinforcement;

[0007] First fixing plates are arranged on both sides of the longitudinal steel bars, a second fixing plate is arranged on one side of the first fixing plate, and a third fixing plate is installed on one side of the second fixing plate.

[0008] Preferably, a positioning groove is provided on one side of the isosceles trapezoidal prefabricated plate, and one end of a pre-embedded tie bar is fixedly sleeved on the other side of the isosceles trapezoidal prefabricated plate.

[0009] Preferably, the other end of the embedded tie bar is fixedly connected to a steel bar ring, a hanging ring is provided on one side of the steel bar ring, and a waterproof membrane is fixedly connected to one side of the basement outer wall.

[0010] Preferably, the upper reinforcement layer, the lower reinforcement layer and the longitudinal steel bars are welded and fixed, and both sides of the upper reinforcement layer and the lower reinforcement layer are fixedly sleeved in the outer wall of the basement.

[0011] Preferably, a slot is provided on the upper surface of the isosceles trapezoidal prefabricated plate, one end of the lifting ring is fixedly inserted in the isosceles trapezoidal prefabricated plate, and a water-stop steel plate is installed on one side of the lifting ring.

[0012] Preferably, a slot is provided on one side of the first fixing plate and the third fixing plate, a supporting steel rod is movably connected in the slot, and a mounting hole is provided on the upper side of the slot.

[0013] Preferably, a fixing shell is provided in the fixing sleeve in the mounting hole, a fastening clip is fixedly clamped in the fixing shell, and a locking sleeve is threadedly connected to one end of the fixing shell.

[0014] Preferably, a nut is fixedly connected to one side of the locking sleeve, a limiting rod is provided inside the fastening clamp, the limiting rod passes through the first fixing plate, the second fixing plate, and the third fixing plate, and both ends of the limiting rod are threadedly connected to the nut, and the first fixing plate, the second fixing plate, the third fixing plate are slidably connected to the outer wall of the basement.

[0015] Compared with the prior art, the beneficial effects of the utility model are:

[0016] The utility model proposes a new type of closed structure for the post-cast strip of the outer wall of a basement in a narrow space, and develops an advance-closed and dismantling-free system for the prefabricated cover plate of the basement outer wall, so that the post-cast strip of the outer wall of the basement under a narrow working surface can be closed in advance, and the waterproofing of the outer wall of the basement and the backfilling of the fertilizer trough can be constructed simultaneously with the main structure, which greatly shortens the construction period and reduces the project cost. At the same time, the new closed structure is simple to process and manufacture on site, and is easy to install. The workload of the entire installation process is small, and construction in a narrow environment is realized, the quality of the prefabricated product is also guaranteed, the integrity of the connection with the post-cast strip is improved, and the risk of leakage at the post-cast strip of the outer wall of the basement is avoided. It has good reference and guiding value. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a front view schematic diagram of the overall structure of the utility model;

[0018] Figure 2 It is a schematic diagram of the back of the overall structure of the utility model;

[0019] Figure 3 It is a top view schematic diagram of the internal structure of the utility model;

[0020] Figure 4 For this utility model Figure 3 A schematic diagram of the structure enlargement in the middle;

[0021] Figure 5 It is a bottom view schematic diagram of the internal structure of the utility model.

[0022] In the figure: 1. Isosceles trapezoidal prefabricated slab; 2. Basement exterior wall; 3. Upper reinforcement; 4. Lower reinforcement; 5. Longitudinal reinforcement; 6. First fixing plate; 7. Second fixing plate; 8. Third fixing plate; 9. Positioning groove; 10. Embedded tie bars; 11. Rebar ring; 12. Lifting ring; 13. Slot; 14. Waterstop steel plate; 15. Waterproof membrane; 16. Slot; 17. Support steel rod; 18. Mounting hole; 19. Fixing shell; 20. Fastening clamp; 21. Locking sleeve; 22. Nut; 23. Limit rod. DETAILED DESCRIPTION

[0023] In order to make the purpose and technical solution of the utility model clearly and completely described, and the advantages more clearly understood, the embodiments of the utility model are further described in detail in conjunction with the accompanying drawings. It should be understood that the specific embodiments described here are part of the embodiments of the utility model, not all of the embodiments, and are only used to explain the embodiments of the utility model, and are not used to limit the embodiments of the utility model. All other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0024] In the description of the present utility model, it should be noted that the terms "center", "middle", "upper", "lower", "left", "right", "inner", "outer", "top", "bottom", "side", "vertical", "horizontal" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operate in a specific orientation, and therefore cannot be understood as a limitation on the present utility model. In addition, the terms "one", "first", "second", "third", "fourth", "fifth", and "sixth" are used for descriptive purposes only, and cannot be understood as indicating or implying relative importance.

[0025] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installation", "connection" and "connection" 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 a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0026] For the purpose of simplicity and illustration, the principles of the embodiments are mainly described by reference to examples. In the following description, many specific details are proposed to provide a thorough understanding of the embodiments. However, it is obvious that for those of ordinary skill in the art, these embodiments may not be limited to these specific details in practice. In some instances, known methods and structures are not described in detail to avoid making these embodiments unnecessarily difficult to understand. In addition, all embodiments can be used in combination with each other.

[0027] See also Figures 1 to 5 The utility model provides a technical solution: a new closed structure of a post-cast strip of a basement exterior wall in a narrow space, comprising: an isosceles trapezoidal prefabricated panel 1, a basement exterior wall 2 is arranged on one side of the isosceles trapezoidal prefabricated panel 1, an upper layer of reinforcement 3 is installed on one side of the basement exterior wall 2, a lower layer of reinforcement 4 is arranged on one side of the upper layer of reinforcement 3, a longitudinal steel bar 5 is installed on one side of the lower layer of reinforcement 4, a positioning groove 9 is opened on one side of the isosceles trapezoidal prefabricated panel 1, and a pre-embedded tie bar 10 is fixedly sleeved on the other side of the isosceles trapezoidal prefabricated panel 1 One end of the embedded tie bar 10 is fixedly connected to a steel ring 11, and a lifting ring 12 is provided on one side of the steel ring 11. A waterproof membrane 15 is fixedly connected to one side of the basement outer wall 2. The upper reinforcement 3 and the lower reinforcement 4 are welded and fixed to the longitudinal reinforcement 5. Both sides of the upper reinforcement 3 and the lower reinforcement 4 are fixedly sleeved in the basement outer wall 2. Slots 13 are provided on the upper surface of the isosceles trapezoidal prefabricated panel 1. One end of the lifting ring 12 is fixedly inserted in the isosceles trapezoidal prefabricated panel 1, and a waterstop steel plate 14 is installed on one side of the lifting ring 12.

[0028] According to the cross-sectional dimensions of the post-casting zone on site, the cross-sectional dimensions of the isosceles trapezoidal precast panel 1 are determined. A slot 13 is provided on the upper surface of the isosceles trapezoidal precast panel 1 to facilitate overlap with the basement exterior wall 2. A waterproof membrane 15 is laid on one side of the basement exterior wall 2. The thickness of the isosceles trapezoidal precast panel 1 is 200 mm and the height is 800 mm. The weight of a single isosceles trapezoidal precast panel is controlled at 365-375 kg, which is convenient for on-site lifting and installation. A positioning groove 9 is provided on one side of the isosceles trapezoidal precast panel 1. The positioning groove 9 is arranged in the middle of the top of the isosceles trapezoidal precast panel 1 to facilitate positioning by pulling a wire from top to bottom during installation, adjust its verticality and horizontal displacement deviation, and strengthen the tightness of the connection with the post-casting zone. According to the lateral pressure calculation of the backfill soil, HRB400 grade steel bars are selected. The upper reinforcement 3 and the lower reinforcement 4 are arranged according to Ф10@150. The thickness of the steel bar protective layer is set to 25 mm, and the thickness of the steel bar protective layer is increased. The overall shear strength of the isosceles trapezoidal prefabricated panel 1 is improved, and the stability of the overall structure is improved. Through wire positioning, embedded tie bars 10 are set at 1 / 3 of the distance from the top of the isosceles trapezoidal prefabricated panel 1, anchored into the isosceles trapezoidal prefabricated panel 1 with a bending length of 250mm, and 300mm is reserved for the outer length. Steel bar rings 11 are set at the ends of the embedded tie bars 10, which can effectively ensure the fixed connection between the steel bars, ensure that the isosceles trapezoidal prefabricated panel 1 is firmly fixed, and improve the overall stability. On the upper and lower sides of the middle of the isosceles trapezoidal prefabricated panel 1, lifting rings 12 are respectively embedded, and HPB300 grade Ф16 round steel is selected, which is anchored into the isosceles trapezoidal prefabricated panel 1 with a bending depth of 500mm, which improves the safety and stability of the lifting process, and saves the later cutting period and cost of the lifting ring 12. Within 100mm on both sides of the isosceles trapezoidal prefabricated panel 1, a waterstop steel plate 14 is respectively set to improve the waterproof performance of the connection between the prefabricated cover plate advanced closed non-dismantling structure and the post-casting belt.

[0029] A first fixing plate 6 is arranged on both sides of the longitudinal reinforcement 5, a second fixing plate 7 is arranged on one side of the first fixing plate 6, a third fixing plate 8 is installed on one side of the second fixing plate 7, a slot 16 is provided on one side of the first fixing plate 6 and the third fixing plate 8, a supporting steel rod 17 is movably connected in the slot 16, a mounting hole 18 is provided on the upper side of the slot 16, a fixing shell 19 is fixedly sleeved in the mounting hole 18, a fastening clip 20 is fixedly connected in the fixing shell 19, a locking sleeve 21 is threadedly connected at one end of the fixing shell 19, a nut 22 is fixedly connected at one side of the locking sleeve 21, a limiting rod 23 is sleeved in the fastening clip 20, the limiting rod 23 passes through the first fixing plate 6, the second fixing plate 7, and the third fixing plate 8, and both ends of the limiting rod 23 are threadedly connected to the nuts 22, and the first fixing plate 6, the second fixing plate 7, the third fixing plate 8 are slidably connected to the basement outer wall 2.

[0030] The first fixing plate 6, the second fixing plate 7, and the third fixing plate 8 are slidably inserted on one side of the basement outer wall 2 to abut against the basement outer wall 2, one side of the second fixing plate 7 is abutted against the first fixing plate 6, and the other side of the second fixing plate 7 is abutted against the third fixing plate 8, and then the limiting rod 23 is inserted between the first fixing plate 6, the second fixing plate 7, and the third fixing plate 8, and the locking sleeve 21 is twisted. There is a threaded fit between the locking sleeve 21 and the fixing shell 19, so that the locking sleeve 21 is continuously extended into the fixing shell 19, and the bifurcations of the fastening clip 20 are all with conical surfaces, and the conical surfaces are in contact with the locking sleeve 21. The inner conical surface of is continuously tightened to achieve the clamping of the limit rod 23. At the same time, the nut 22 fixedly installed on one side of the locking sleeve 21 is threadedly connected with the limit rod 23, and the limit rod 23 is further limited, so that the first fixing plate 6, the second fixing plate 7, and the third fixing plate 8 are tightly fitted, so that the first fixing plate 6, the second fixing plate 7, and the third fixing plate 8 clamp the upper reinforcement 3 and the lower reinforcement 4, thereby improving the stability of the entire device. Finally, the supporting steel rod 17 is placed in the slot 16 to ensure the stability between the first fixing plate 6, the second fixing plate 7, and the third fixing plate 8.

[0031] In actual use, the cross-sectional dimensions of the isosceles trapezoidal prefabricated panel 1 are determined according to the cross-sectional dimensions of the post-casting strip on site. A slot 13 is provided on the upper surface of the isosceles trapezoidal prefabricated panel 1, so as to facilitate the overlap with the basement outer wall 2. A waterproof membrane 15 is paved on one side of the basement outer wall 2. The waterproof membrane 15 is paved tightly without staggered seams. The thickness of the isosceles trapezoidal prefabricated panel 1 is 200 mm and the height is 800 mm. The weight of a single isosceles trapezoidal prefabricated panel is controlled at 365-375 kg, which is convenient for on-site lifting and installation. A positioning groove 9 is provided on one side of the isosceles trapezoidal prefabricated panel 1. The positioning groove 9 is arranged at the top middle position of the isosceles trapezoidal prefabricated panel 1, so as to facilitate the positioning by pulling the wire from top to bottom during the installation process, adjust its verticality and horizontal displacement deviation, and strengthen In order to ensure the tightness of the connection with the post-casting belt, HRB400 grade steel bars are selected according to the lateral pressure calculation of the backfill soil. The upper reinforcement 3 and the lower reinforcement 4 are arranged according to Ф10@150, and the thickness of the steel bar protection layer is set to 25mm. The overall shear strength of the isosceles trapezoidal precast panel 1 structure is increased, and the stability of the overall structure is improved. Through the positioning of the wire, a pre-embedded tie bar 10 is set at 1 / 3 of the distance from the top of the isosceles trapezoidal precast panel 1, and the anchor is 250mm in the bending length of the isosceles trapezoidal precast panel 1, and 300mm is reserved for the outer length. A steel bar ring 11 is set at the end of the pre-embedded tie bar 10, which can effectively ensure the fixed connection between the steel bars, ensure that the isosceles trapezoidal precast panel 1 is firmly fixed, and improve the overall stability. On the upper and lower sides of the middle of the isosceles trapezoidal precast panel 1, pre-embedded tie bars 10 are respectively provided. The lifting ring 12 is buried, and HPB300 grade Ф16 round steel is selected, which is anchored into the isosceles trapezoidal prefabricated panel 1 with a bending depth of 500mm, which improves the safety and stability of the lifting process, and saves the cutting period and cost of the lifting ring 12 in the later stage. A water-stop steel plate 14 is respectively arranged within 100mm on both sides of the isosceles trapezoidal prefabricated panel 1 to improve the waterproof performance of the connection part between the prefabricated cover plate advanced closed non-disassembly structure and the post-casting belt. The first fixed plate 6, the second fixed plate 7, and the third fixed plate 8 are slidably inserted on one side of the basement outer wall 2 and abutted against the basement outer wall 2, one side of the second fixed plate 7 is abutted against the first fixed plate 6, and the other side of the second fixed plate 7 is abutted against the third fixed plate 8, and then the limit rod 23 is inserted into the first fixed plate 6, the second fixed plate 7, and the third fixed plate 8. By twisting the locking sleeve 21 between the three fixing plates 8, there is a threaded match between the locking sleeve 21 and the fixing shell 19, so that the locking sleeve 21 is continuously extended into the fixing shell 19, and the forks of the fastening clamp 20 are all with conical surfaces, and the conical surfaces are continuously matched and tightened with the inner conical surface of the locking sleeve 21, so as to realize the clamping of the limit rod 23. At the same time, the nut 22 fixedly installed on one side of the locking sleeve 21 is threadedly connected with the limit rod 23, and the limit rod 23 is further limited, so that the first fixing plate 6, the second fixing plate 7, and the third fixing plate 8 are closely fitted, so that the first fixing plate 6, the second fixing plate 7, and the third fixing plate 8 clamp the upper reinforcement 3 and the lower reinforcement 4, thereby improving the stability of the entire device, and finally the supporting steel rod 17 is placed in the slot 16.Thus, the stability among the first fixing plate 6, the second fixing plate 7 and the third fixing plate 8 is ensured.

[0032] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A new type of closed structure for the post-cast strip of the outer wall of a small basement, comprising an isosceles trapezoidal prefabricated panel (1), characterized in that The isosceles trapezoidal prefabricated panel (1) is provided with a basement outer wall (2) on one side, the basement outer wall (2) is provided with an upper layer of reinforcement (3) on one side of the basement outer wall (2), a lower layer of reinforcement (4) is provided on one side of the upper layer of reinforcement (3), and a longitudinal steel bar (5) is provided on one side of the lower layer of reinforcement (4); First fixing plates (6) are arranged on both sides of the longitudinal steel bars (5), a second fixing plate (7) is arranged on one side of the first fixing plate (6), and a third fixing plate (8) is installed on one side of the second fixing plate (7).

2. According to claim 1, a novel closed structure for the post-cast strip of the outer wall of a narrow basement, characterized in that: A positioning groove (9) is provided on one side of the isosceles trapezoidal prefabricated plate (1), and one end of a pre-embedded tie bar (10) is fixedly sleeved on the other side of the isosceles trapezoidal prefabricated plate (1).

3. According to claim 2, a novel closed structure for post-cast strips on the exterior wall of a narrow basement, characterized in that: The other end of the embedded tie bar (10) is fixedly connected to a steel bar ring (11), one side of the steel bar ring (11) is provided with a hanging ring (12), and one side of the basement outer wall (2) is fixedly connected to a waterproof membrane (15).

4. According to claim 3, a novel closed structure for post-cast strips on the exterior wall of a narrow basement, characterized in that: The upper reinforcement (3) and the lower reinforcement (4) are welded and fixed to the longitudinal steel bars (5), and both sides of the upper reinforcement (3) and the lower reinforcement (4) are fixedly sleeved in the basement outer wall (2).

5. According to claim 4, a novel closed structure of the post-cast strip of the outer wall of a small space basement is characterized by: The upper surface of the isosceles trapezoidal prefabricated plate (1) is provided with a slot (13), one end of the lifting ring (12) is fixedly inserted into the isosceles trapezoidal prefabricated plate (1), and a water stop steel plate (14) is installed on one side of the lifting ring (12).

6. According to claim 5, a novel closed structure for the post-cast strip of the outer wall of a narrow basement, characterized in that: A clamping groove (16) is provided on one side of the first fixing plate (6) and the third fixing plate (8), a supporting steel rod (17) is movably clamped in the clamping groove (16), and a mounting hole (18) is provided on the upper side of the clamping groove (16).

7. The novel closed structure of the post-cast strip of the outer wall of a small basement according to claim 6 is characterized by: A fixing shell (19) is fixedly sleeved in the mounting hole (18), a fastening clip (20) is fixedly clamped in the fixing shell (19), and a locking sleeve (21) is threadedly connected to one end of the fixing shell (19).

8. The novel closed structure of the post-cast strip of the outer wall of a small basement according to claim 7 is characterized by: A nut (22) is fixedly connected to one side of the locking sleeve (21); a limiting rod (23) is sleeved inside the fastening clamp (20); the limiting rod (23) passes through the first fixing plate (6), the second fixing plate (7), and the third fixing plate (8); and both ends of the limiting rod (23) are threadedly connected to the nut (22); the first fixing plate (6), the second fixing plate (7), the third fixing plate (8) are slidably connected to the basement outer wall (2).

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