Sealing plate mechanism for advanced sealing of post-cast strips of basement exterior walls and post-cast strips of raft slabs

Abstract

The invention discloses a blocking plate mechanism for pre-sealing a post-cast strip of a basement outer wall and a raft slab post-cast strip, belonging to the field of general building structures, and solving the problem of pre-sealing a post-cast strip on the outer wall of a shared basement shear wall at the intersection of a basement below a high-rise main building and a basement below a low-rise podium building; a prefabricated reinforced concrete unit plate (5) is abutted between the outer facade of a left outer wall body (2) of the basement and the outer facade of a right outer wall body (3) of the basement, and a pair of steel pipes (8) are abutted between the inner facade of the left outer wall body (2) of the basement and the inner facade of the right outer wall body (3) of the basement; the open end of a U-shaped screw (7) passes through a pair of U-shaped screws, passes through a through hole (11), a steel bar gap in a post-cast strip (4) of the basement outer wall and a pair of steel pipes (8) in a direction from outside to inside, and is then connected with a butterfly clamp (9) and a nut (10); the structure is simple and easy to implement.

Description

Technical Field

[0001] The invention relates to a basement shear wall post-cast strip, in particular to a blocking plate mechanism for sealing the outer opening of the basement shear wall post-cast strip in advance, belonging to the field of general building construction. Background Art

[0002] Some complex buildings are composed of a high-rise main building and a low-rise podium building. The basement of the high-rise main building and the basement of the low-rise podium building are interconnected and share the outer wall of the basement shear wall, which is also called a retaining wall. Backfill soil is arranged on the outside of the retaining wall. In the foundation construction of such a building, the following situations may sometimes be encountered: on the outer wall of the basement shear wall at the intersection of the high-rise main building and the low-rise podium building, a settlement post-cast strip of the basement shear wall is designed. It is responsible for absorbing the uneven settlement caused by the weight difference between the high-rise main building and the low-rise podium building, and at the same time, it is responsible for absorbing the thermal expansion and contraction deformation of the basement outer wall concrete caused by temperature changes, so as to prevent cracks in the wall concrete. For the settlement post-cast strip on the basement shear wall, it is usually installed after the main structure is constructed. After the construction is completed, the temperature shrinkage of the concrete is basically completed, and the settlement of the main structure is stable, the settlement post-casting strip is sealed with secondary concrete pouring; however, during on-site construction, since the basements are all located in deep foundation pits, the settlement post-casting strips on the outer walls of the basement retaining walls are in the soil on the side of the foundation pit. In order to prevent rainwater in the foundation pit from entering the basement of the main structure through the post-casting strips, the usual practice is to close the outer opening of the basement settlement post-casting strip in advance and carry out backfilling operations; timely backfilling of the foundation pit outside the outer wall of the main structure can, on the one hand, eliminate the hidden dangers of landslides and collapses on the slopes of the deep foundation pit, and on the other hand, prevent rainwater from entering the basement space. At the same time, after the backfilling is completed, the construction working surface around the foundation pit is also increased, which facilitates the construction of the main structure above.

[0003] For the advanced closure of the opening outside the post-cast strip of the basement settlement, the existing technology mostly adopts the structural form of building a retaining wall, that is, a retaining wall is built on the outside of the post-cast strip of the basement settlement, so that the inner wall facades at both ends of the retaining wall are close to the outer facades of the basement concrete wall on both sides of the post-cast strip, so as to achieve the closure of the opening outside the post-cast strip, and then, plastering, waterproofing layer, extruded polystyrene board waterproofing protective layer are applied on the outside of the closed masonry wall, and finally, backfilling is performed to complete the blocking of the outside of the post-cast strip of the basement; but this construction method has the disadvantages of The following problems are solved: (1) The construction of retaining walls is time-consuming and labor-intensive, and the wall strength is limited; (2) Since a flexible extruded polystyrene waterproof protective layer is provided on the outside of the masonry wall, there is no reliable external support measure at the connection between the masonry wall and the cast basement shear wall. Especially in the later concrete sealing pouring of the settlement post-casting strip, the retaining wall masonry wall is easily expanded due to the vibration and squeezing of the concrete by the vibrator rod, resulting in cracks in the waterproof layer on the outside of the retaining wall, which pre-buries the hidden danger of water leakage in the basement; the existing technology also uses prefabricated reinforced concrete structural panels , the method of closing the outer opening of the settlement post-cast strip on the outer wall of the basement. The specific process is: pre-embedded connecting steel bars are placed on the prefabricated reinforced concrete structural plate, and the structural plate is attached to the outer facade of the basement shear wall on both sides of the post-cast strip from the outside to the inside. The reserved tie steel bars on the structural plate are then welded together with the horizontal main bars of the post-cast strip. Finally, backfilling is performed. This method has the following problems: (1) Due to the influence of the temperature change of the concrete of the poured wall, the horizontal steel bars in the post-cast strip are in the process of expansion and contraction, and the sealing of the outer opening of the post-cast strip is not smooth. The precast reinforced concrete structural plate is a rigid sealing plate, and the pre-embedded connecting steel bars on the precast reinforced concrete structural plate are also rigid. The horizontal steel bars in the post-casting strip that is undergoing expansion and contraction are welded together with the pre-embedded steel bars in the rigid precast reinforced concrete structural plate, and a tensile force is generated, which will directly affect the free expansion and contraction of the concrete walls on both sides of the post-casting strip. (2) The welding operation between the pre-embedded steel bars on the precast reinforced concrete structural plate and the main bars of the shear wall at the post-casting strip will also cause damage to the horizontal main bars in the post-casting strip, affecting the molding quality of the post-casting strip after the secondary concrete pouring. Summary of the invention

[0004] The present invention provides a blocking plate mechanism for pre-sealing the post-cast strips of the basement outer wall and the raft slab post-cast strips, which solves the technical problem of pre-reliably sealing the settlement post-cast strips on the outer wall of the shared basement shear wall at the intersection of the basement of a high-rise main building and the basement of a low-rise podium building.

[0005] The present invention solves the above technical problems through the following technical solutions:

[0006] The overall concept of the present invention is: in order to close the outer opening of the settlement post-casting strip of the outer wall of the basement and the upper port and side opening of the raft post-casting strip, an integrated blocking plate mechanism is manufactured for these openings, so that the integrated blocking plate mechanism and the outer facade of the basement wall on both sides of the settlement post-casting strip, the top surface of the raft post-casting strip and the outer facade of the raft post-casting strip are movably fitted together, forming a closed connection relationship in which the blocking plate mechanism and the concrete walls on both sides of the post-casting strip can slide relatively, so that the concrete walls on both sides of the settlement post-casting strip can freely settle and expand and contract under the clamping of the integrated blocking plate mechanism, so that the function of the post-casting strip is fully exerted, and the advanced sealing of the outer port of the post-casting strip is realized, and at the same time, it is ensured that when the post-casting strip concrete is poured for the second time in the later stage, The tensile strength of the integrated blocking plate and the closed inner formwork of the post-cast strip ensures that the mold expansion phenomenon will not occur during the secondary pouring of concrete, which will lead to the damage of the unified outer waterproof layer. The technical solution of the present invention achieves three goals at one stroke; the specific solution is: the integrated blocking plate is composed of a number of prefabricated reinforced concrete unit plates spliced ​​together, and a pair of through holes are arranged on the plate surface of each prefabricated reinforced concrete unit plate, and a U-shaped screw is arranged in the pair of through holes. On the inner facade of the basement wall on both sides of the settlement post-cast strip, a pair of horizontal steel pipes are movably connected, and the open end of the U-shaped screw first passes through the pair of through holes on the plate surface of the prefabricated reinforced concrete unit plate from the outside to the inside, and then moves through the gap where the steel bars are arranged in the post-cast strip, and finally After passing through two horizontal steel pipes, it is connected with the butterfly clamp and the fixing nut, and the prefabricated reinforced concrete unit plate is pulled and connected to the outer facades of the two basement walls outside the settlement post-casting strip through the pulling connection of the U-shaped screw, so as to realize the closure of the outer opening of the settlement post-casting strip of the basement outer wall; this connection mode in which the closing plate mechanism and the steel bars and walls in the settlement post-casting strip are independently movable and connected to each other realizes the independent tension and tightening of the closing plate mechanism, and realizes the free expansion and contraction and settlement of the cast-in-place concrete basement walls and raft slabs on both sides of the settlement post-casting strip without being restricted by the tension closing plate mechanism; a horizontal long strip groove is set on the top surface of the lower prefabricated reinforced concrete unit plate, and a horizontal long strip convex is set on the lower bottom surface of the upper prefabricated reinforced concrete unit plate The upper and lower prefabricated reinforced concrete unit panels are spliced ​​into a blocking plate through the cooperation of the horizontal long strip grooves and the horizontal long strip protrusions. When uneven settlement occurs on both sides of the post-casting strip, the blocking plate will be tilted to one side. The cooperation of the horizontal long strip grooves and the horizontal long strip protrusions can well prevent the upper prefabricated reinforced concrete unit panel from sliding to one side; a steel plate is embedded in the lower end of the outer facade of the lowest prefabricated reinforced concrete unit panel, and an L-shaped blocking steel plate is arranged on the raft post-casting strip on the outer side of the wall. The inner side end of the L-shaped blocking steel plate is welded to the embedded steel plate on the outer facade of the lowest prefabricated reinforced concrete unit panel, thereby forming an integrated and movable overall closure of the raft post-casting strip on the outer side of the wall post-casting strip;The structure and construction method of the present invention not only take into account the expansion and contraction function of the post-casting belt with temperature, but also solve the problem of deformation and movement of the plugging plate caused by uneven settlement of the post-casting belt, and also facilitate the cleaning of garbage in the settled post-casting belt space in the later stage, and simplify the support of the closed template when blocking the post-casting belt in the later stage. ;

[0007] A blocking plate mechanism for pre-sealing a basement exterior wall post-casting strip and a raft slab post-casting strip comprises a prefabricated reinforced concrete unit plate, a U-shaped screw, a steel pipe, a raft slab post-casting strip and a basement exterior wall post-casting strip, a concrete left raft slab is arranged on the left side of the raft slab post-casting strip, a concrete right raft slab is arranged on the right side of the raft slab post-casting strip, a basement exterior wall body is arranged on the concrete left raft slab, a basement exterior wall post-casting strip is arranged between the basement exterior wall body and the basement exterior wall body, the basement exterior wall post-casting strip and the raft slab post-casting strip are arranged correspondingly from top to bottom, a prefabricated reinforced concrete unit plate is abutted between the outer facade of the basement exterior wall body and the outer facade of the basement exterior wall body, and a prefabricated reinforced concrete unit plate is arranged between the outer facade of the basement exterior wall body and the outer facade of the basement exterior wall body. A pair of U-shaped screws are arranged on the plate surface to pass through through holes, and a pair of steel pipes are connected between the inner facade of the left outer wall of the basement and the inner facade of the right outer wall of the basement. The open end of the U-shaped screw passes through the pair of U-shaped screws in the direction from outside to inside, passes through the through holes, the steel bar gaps in the wall of the basement outer wall post-casting strip and a pair of steel pipes, and is then connected with the butterfly clip and the nut. The U-shaped screw tightens the prefabricated reinforced concrete unit plate and the pair of steel pipes together to close the outer opening of the basement outer wall post-casting strip; an embedded steel plate is arranged at the lower end of the outer facade of the prefabricated reinforced concrete unit plate, and an L-shaped steel plate is welded and connected to the embedded steel plate. The L-shaped steel plate is movably arranged on the raft slab post-casting strip outside the basement outer wall post-casting strip to close the raft slab post-casting strip outside the basement outer wall post-casting strip.

[0008] A horizontal long strip protrusion is arranged on the top surface of the prefabricated reinforced concrete unit plate, and a horizontal long strip groove is arranged on the lower bottom surface of the prefabricated reinforced concrete unit plate. The upper and lower prefabricated reinforced concrete unit plates are vertically stacked together by the horizontal long strip protrusion and the horizontal long strip groove to close the outer opening of the post-cast strip of the basement outer wall.

[0009] The concrete frame of the high-rise main building is arranged on the left outer wall of the basement, and the concrete frame of the low-rise podium is arranged on the right outer wall of the basement. The raft slab post-cast joint is both a temperature post-cast joint and a settlement post-cast joint.

[0010] A method for pre-sealing and pouring a basement outer wall post-casting strip and a raft slab post-casting strip, wherein the basement below the high-rise main building and the basement below the low-rise podium are interconnected and share a basement shear wall outer wall, and a basement shear wall post-casting strip and a raft slab post-casting strip are arranged on the basement shear wall outer wall at the intersection of the high-rise main building and the low-rise podium, comprising the following steps:

[0011] The first step is to prefabricate reinforced concrete unit panels according to the width of the post-cast strip of the basement shear wall, and to set a pair of U-shaped screws through through holes on the panel surface of the prefabricated reinforced concrete unit panels, to set a horizontal long strip protrusion on the top surface of the prefabricated reinforced concrete unit panels, to set a horizontal long strip groove on the bottom surface of the prefabricated reinforced concrete unit panels, and to set an embedded steel plate at the lower end of the outer facade of the prefabricated reinforced concrete unit panels;

[0012] Step 2: Make a U-shaped screw according to the spacing of a pair of U-shaped screws passing through the through holes, and make an L-shaped steel plate according to the width and height of the raft slab post-casting strip outside the basement shear wall post-casting strip;

[0013] Step 3: After the shear wall of the basement shared by the main building and the podium is poured, a reinforced concrete unit plate is movably connected between the outer facade of the left exterior wall of the basement and the outer facade of the right exterior wall of the basement, and a pair of steel pipes are movably connected between the inner facade of the left exterior wall of the basement and the inner facade of the right exterior wall of the basement. The open end of the U-shaped screw is passed through the pair of U-shaped screws on the reinforced concrete unit plate from the outside to the inside, through the through holes, the wall steel bar gaps in the basement exterior wall post-casting zone, and a pair of steel pipes, and then connected with the butterfly clamp and the nut. By tightening the nut, the U-shaped screw pulls the reinforced concrete unit plate and the pair of steel pipes together, thereby closing the outer opening of the basement exterior wall post-casting zone;

[0014] The fourth step is to weld and connect the L-shaped steel plate to the embedded steel plate, so that the L-shaped steel plate can be movably set on the raft slab post-casting strip outside the basement outer wall post-casting strip, and the upper port and outer side port of the raft slab post-casting strip are closed.

[0015] Step 5: An extruded polystyrene board is arranged on the outer facade of the reinforced concrete unit slab, and then plastering is performed on the outer facade of the extruded polystyrene board, the outer facade of the left outer wall of the basement, and the outer facade of the right outer wall of the basement, and a waterproof protective layer is applied to form a unified waterproof protective layer on the outer facade of the outer wall of the basement;

[0016] Step 6: Backfill the foundation pit outside the pre-closed basement exterior wall post-casting zone, and then pour the main concrete frame of the main building and the main frame of the podium building;

[0017] Step 7: When the settlement of the main building and the podium is stable, first remove the butterfly clip and nut from the open end of the U-shaped screw, and then remove the steel pipe;

[0018] Step 8: Shave the leaking slurry on both sides of the inner wall in the back-cast strip of the basement outer wall, and clean up the construction waste in the back-cast strip of the basement outer wall;

[0019] Step 9: Make an inner wooden formwork to close the inner opening of the post-cast strip of the basement outer wall. According to the position of the inner end of the U-shaped screw, drill a hole in the inner wooden formwork for the inner end of the U-shaped screw to pass through;

[0020] Step 10: Place the inner wooden formwork against the inner opening of the post-cast strip of the basement outer wall, pass the inner end of the U-shaped screw through the hole drilled in step 9, set wooden slats and steel pipes on the inner wooden formwork, and then connect the butterfly clip and nut to the inner end of the U-shaped screw to fasten the inner wooden formwork;

[0021] Step 11: Carry out secondary concrete pouring and sealing of the basement shear wall post-casting strip and raft slab post-casting strip;

[0022] Step 12: After the concrete of the basement shear wall post-casting joint and the raft slab post-casting joint has finally set, remove the inner wooden formwork and cut off the exposed inner end of the U-shaped screw.

[0023] The present invention overcomes the defect that when the post-cast strip of the masonry retaining wall is closed, the secondary pouring of concrete is prone to bulging, thereby destroying the outer waterproof layer of the retaining wall, and solves the problem that when the precast concrete slab is temporarily closed, the existing pulling and fixing method of the precast concrete slab will hinder the full function of the settlement post-cast strip; the advanced sealing of the settlement post-cast strip and the later secondary pouring permanent sealing work are unified, the quality of each construction link is improved, the construction time is effectively saved, and the precast concrete baffle is arranged in a trapezoidal shape, so that one slab can be used for multiple purposes. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 It is a schematic diagram of the structure of the present invention;

[0025] Figure 2 It is a structural schematic diagram of a reinforced concrete unit slab 5 of the present invention;

[0026] Figure 3 It is a schematic structural diagram of the embedded steel plate 14 on the reinforced concrete unit slab 5 of the present invention. DETAILED DESCRIPTION

[0027] The present invention is described in detail below in conjunction with the accompanying drawings:

[0028] A blocking plate mechanism for pre-sealing a basement exterior wall post-casting strip and a raft post-casting strip, comprising a prefabricated reinforced concrete unit plate 5, a U-shaped screw 7, a steel pipe 8, a raft post-casting strip 1 and a basement exterior wall post-casting strip 4, a concrete left raft 15 is arranged on the left side of the raft post-casting strip 1, a concrete right raft 16 is arranged on the right side of the raft post-casting strip 1, a basement left exterior wall 2 is arranged on the concrete left raft 15, a basement right exterior wall 3 is arranged on the concrete right raft 16, and a basement left exterior wall 2 and a basement right exterior wall 3 are connected. A basement exterior wall post-cast strip 4 is arranged between the side exterior wall bodies 3, and the basement exterior wall post-cast strip 4 and the raft slab post-cast strip 1 are arranged correspondingly up and down. A prefabricated reinforced concrete unit plate 5 is connected between the outer facade of the left exterior wall body 2 of the basement and the outer facade of the right exterior wall body 3 of the basement. A pair of U-shaped screws passing through through holes 11 are arranged on the plate surface of the prefabricated reinforced concrete unit plate 5, and a pair of steel pipes 8 are connected between the inner facade of the left exterior wall body 2 of the basement and the inner facade of the right exterior wall body 3 of the basement. The opening of the U-shaped screw 7 The opening end is passed through a pair of U-shaped screws in the direction from outside to inside, through the through hole 11, the steel bar gap in the wall of the basement outer wall post-casting strip 4 and a pair of steel pipes 8, and then connected with the butterfly clamp 9 and the nut 10. The butterfly clamp 9 is clamped between the pair of steel pipes 8. The U-shaped screw tightens the prefabricated reinforced concrete unit plate 5 and the pair of steel pipes 8 together. The reinforced concrete unit plate 5, the U-shaped screw 7, the steel pipe 8, the butterfly clamp 9 and the nut 10 form an independent plugging and tightening mechanism, which realizes the sealing of the outer opening of the basement outer wall post-casting strip 4. At the same time, it will not hinder the expansion and contraction and downward settlement of the cast-in-place concrete shear exterior wall arranged between the reinforced concrete unit plate 5 and a pair of steel pipes 8 in the backcast strip; a pre-buried steel plate 14 is arranged at the lower end of the outer facade of the prefabricated reinforced concrete unit plate 5, and an L-shaped steel plate 6 is welded and connected to the pre-buried steel plate 14. The L-shaped steel plate 6 is movably arranged on the raft slab backcast strip 1 outside the basement exterior wall backcast strip 4, and the raft slab backcast strip 1 outside the basement exterior wall backcast strip 4 is closed, so that the raft slabs on both sides of the raft slab backcast strip 1 can be freely expanded and contracted in the L-shaped steel plate 6.

[0029] A horizontal long strip protrusion 12 is arranged on the top surface of the prefabricated reinforced concrete unit plate 5, and a horizontal long strip groove 13 is arranged on the lower bottom surface of the prefabricated reinforced concrete unit plate 5. The upper and lower prefabricated reinforced concrete unit plates 5 are vertically superimposed and embedded together through the cooperation of the horizontal long strip protrusion 12 and the horizontal long strip groove 13 to close the outer opening of the back-cast strip 4 of the basement outer wall. The sealing plate can be composed of multiple reinforced concrete unit plates 5 stacked vertically up and down. The horizontal long strip protrusion 12 and the horizontal long strip groove 13 cooperate to make the two vertically superimposed reinforced concrete unit plates 5 tighter, and when uneven settlement occurs, it can also prevent the upper sealing unit plate from slipping; two pairs of U-shaped screws can be arranged on each reinforced concrete unit plate 5 to pass through the through holes 11, and two rows of steel pipes 8 are correspondingly arranged. Through the pulling of the two groups of U-shaped screws 7, the expansion mold of the reinforced concrete unit plate 5 is prevented from damaging the outer waterproof layer during the secondary pouring of concrete in the later stage.

[0030] The concrete frame of the high-rise main building is arranged on the left outer wall 2 of the basement, and the concrete frame of the low-rise podium is arranged on the right outer wall 3 of the basement. Due to the huge difference in the bearing weight of the outer walls on both sides, the raft slab post-cast joint 1 and the basement outer wall post-cast joint 4 are both settlement post-cast joints and temperature post-cast joints, and the settlement amount is the primary consideration on site.

[0031] A method for pre-sealing and pouring a basement exterior wall post-casting strip and a raft slab post-casting strip, wherein the basement below the high-rise main building and the basement below the low-rise podium are interconnected and share a basement shear wall exterior wall, and a basement shear wall post-casting strip 4 and a raft slab post-casting strip 1 are arranged on the basement shear wall exterior wall at the intersection of the high-rise main building and the low-rise podium, comprising the following steps:

[0032] The first step is to prefabricate reinforced concrete unit panels 5 according to the width of the post-cast strip 4 of the basement shear wall. The width of the prefabricated reinforced concrete unit panels 5 is greater than the width of the post-cast strip 4 of the basement shear wall. A pair of U-shaped screws are provided on the panel surface of the prefabricated reinforced concrete unit panels 5 through through holes 11. A horizontal long strip protrusion 12 is provided on the top surface of the prefabricated reinforced concrete unit panels 5. A horizontal long strip groove 13 is provided on the lower bottom surface of the prefabricated reinforced concrete unit panels 5. An embedded steel plate 14 is provided at the lower end of the outer facade of the prefabricated reinforced concrete unit panels 5. The above technical features are all embedded and formed at one time when the reinforced concrete unit panels 5 are prefabricated.

[0033] The second step is to make a U-shaped screw 7 according to the spacing of a pair of U-shaped screws passing through the through hole 11, and to make an L-shaped steel plate 6 according to the width and height of the raft slab post-casting strip 1 outside the basement shear wall post-casting strip 4, wherein the width of the L-shaped steel plate 6 is greater than the width of the raft slab post-casting strip 1, and the height of the L-shaped steel plate 6 is equal to the height of the raft slab post-casting strip 1;

[0034] Step 3: After the shear wall of the basement shared by the main building and the podium is cast, the reinforced concrete unit plate 5 is movably connected between the outer facade of the left side outer wall 2 of the basement and the outer facade of the right side outer wall 3 of the basement, and a pair of steel pipes 8 are movably connected between the inner facade of the left side outer wall 2 of the basement and the inner facade of the right side outer wall 3 of the basement. The open end of the U-shaped screw 7 is passed through the pair of U-shaped screws on the reinforced concrete unit plate 5 from the outside to the inside, through the through hole 11, the wall steel bar gap in the basement outer wall post-casting belt 4 and the pair of steel pipes 8, and then connected with the butterfly clamp 9 and the nut 10. By tightening the nut 10, the U-shaped screw pulls the reinforced concrete unit plate 5 and the pair of steel pipes 8 together, thereby closing the outer opening of the basement outer wall post-casting belt 4;

[0035] The fourth step is to weld and connect the L-shaped steel plate 6 to the embedded steel plate 14, so that the L-shaped steel plate 6 is movably arranged on the raft slab post-casting strip 1 outside the basement outer wall post-casting strip 4, and the upper end and the outer end of the raft slab post-casting strip 1 are closed; plastering is performed on the L-shaped steel plate 6 and the outer facade of the reinforced concrete unit plate 5, a waterproof layer is applied, and an extruded polystyrene board waterproof protective layer is arranged.

[0036] Step 5: An extruded polystyrene board is arranged on the outer facade of the reinforced concrete unit slab 5, and then plastering is performed on the outer facade of the extruded polystyrene board, the outer facade of the left outer wall 2 of the basement, and the outer facade of the right outer wall 3 of the basement, and a waterproof protective layer is applied to form a unified waterproof protective layer on the outer facade of the outer wall of the basement;

[0037] Step 6: Backfill the foundation pit outside the pre-enclosed basement outer wall post-casting zone 4, and then cast the main building concrete frame and the podium main frame concrete;

[0038] Step 7: When the settlement of the main building and the podium building is stable, first remove the butterfly clamp 9 and the nut 10 from the open end of the U-shaped screw 7, and then remove the steel pipe 8;

[0039] Step 8: Shaving the leaked slurry on both sides of the inner wall in the basement outer wall post-casting belt 4, and cleaning up the construction waste in the basement outer wall post-casting belt 4;

[0040] Step 9: Make an inner wooden template to close the inner opening of the post-cast strip 4 of the basement outer wall, and drill a hole through which the inner end of the U-shaped screw 7 passes in the inner wooden template according to the position of the inner end of the U-shaped screw 7;

[0041] The tenth step is to place the inner wooden formwork against the inner opening of the post-casting strip 4 of the basement outer wall, so that the inner end of the U-shaped screw 7 passes through the hole drilled in the ninth step, and wooden slats and steel pipes 8 are arranged on the inner wooden formwork, and then the butterfly clip 9 and the nut 10 are connected to the inner end of the U-shaped screw 7 to achieve the fastening of the inner wooden formwork; the U-shaped screw 7 now plays the role of pulling and fixing the inner wooden formwork;

[0042] Step 11: The basement shear wall post-casting strip 4 and the raft slab post-casting strip 1 are sealed with secondary concrete pouring; the U-shaped screw 7 is reused to play the role of pulling and fixing the inner formwork;

[0043] Step 12: After the concrete of the basement shear wall post-casting strip 4 and the raft slab post-casting strip 1 is finally set, the inner wooden formwork is removed and the inner end of the exposed U-shaped screw 7 is cut off.

[0044] A horizontal long strip protrusion 12 is arranged on the top surface of the prefabricated reinforced concrete unit plate 5, and a horizontal long strip groove 13 is arranged on the lower bottom surface of the prefabricated reinforced concrete unit plate 5. The upper and lower prefabricated reinforced concrete unit plates 5 are vertically stacked together by cooperating with the horizontal long strip protrusion 12 and the horizontal long strip groove 13 to close the outer opening of the post-cast strip 4 of the basement outer wall.

[0045] The integrated blocking plate mechanism composed of the prefabricated reinforced concrete unit plate 5, L-shaped steel plate 6 and U-shaped screw 7 of the present invention plays two roles at the same time. The first role is: it blocks the post-casting zone space during the construction of the entire building main frame, so that the backfill soil outside the foundation pit cannot enter the space. At this time, the horizontal pulling force after the U-shaped screw 7 is connected with the steel pipe 8, butterfly clamp 9 and nut 10 does not need to be too large, and it only needs to play the role of pulling and receiving the reinforced concrete unit plate 5. In this process, the cast-in-place left side exterior wall 2 of the basement and the right side exterior wall 3 of the basement can be connected between the reinforced concrete unit plate 5 and the The steel pipes 8 can freely expand and contract and fully settle; the second function is: when the entire building is poured and fully settled, the reinforced concrete unit plate 5, L-shaped steel plate 6, U-shaped screw 7 and inner wooden formwork form a secondary concrete pouring formwork system closed by the post-casting belt. At this time, the horizontal pulling force after the connection of the U-shaped screw 7 and the steel pipe 8, butterfly clip 9 and nut 10 should be increased to overcome the impact force of the secondary concrete pouring and vibration, to ensure that the reinforced concrete unit plate 5 is closely connected with the left outer wall 2 and the right outer wall 3 of the basement without cracks, to ensure the safety of the waterproof layer buried in the soil.

Claims

1. A sealing plate mechanism for pre-sealing a basement exterior wall post-casting strip and a raft slab post-casting strip, comprising a prefabricated reinforced concrete unit plate (5), a U-shaped screw rod (7), a steel pipe (8), a raft slab post-casting strip (1) and a basement exterior wall post-casting strip (4); a concrete left raft slab (15) is arranged on the left side of the raft slab post-casting strip (1); a concrete right raft slab (16) is arranged on the right side of the raft slab post-casting strip (1); a basement exterior wall body (2) is arranged on the concrete left raft slab (15); a basement exterior wall body (3) is arranged on the concrete right raft slab (16); a basement exterior wall post-casting strip (4) is arranged between the basement exterior wall body (2) and the basement exterior wall body (3); the basement exterior wall post-casting strip (4) and the raft slab post-casting strip (1) are arranged in correspondence with each other from top to bottom, characterized in that: A prefabricated reinforced concrete unit plate (5) is connected between the outer facade of the left side outer wall (2) of the basement and the outer facade of the right side outer wall (3) of the basement. A pair of U-shaped screws are provided on the plate surface of the prefabricated reinforced concrete unit plate (5) to pass through through holes (11). A pair of steel pipes (8) are connected between the inner facade of the left side outer wall (2) of the basement and the inner facade of the right side outer wall (3) of the basement. The open end of the U-shaped screw (7) passes through the through holes (11) in sequence from the outside to the inside. A pair of U-shaped screws on the reinforced concrete unit plate (5) pass through the through hole (11), the steel bar gap in the wall of the basement outer wall post-cast strip (4) and a pair of steel pipes (8), and are connected together with a butterfly clamp (9) and a nut (10); an embedded steel plate (14) is arranged at the lower end of the outer facade of the prefabricated reinforced concrete unit plate (5), an L-shaped steel plate (6) is welded and connected to the embedded steel plate (14), and the L-shaped steel plate (6) is movably arranged on the raft slab post-cast strip (1) outside the basement outer wall post-cast strip (4).

2. The sealing plate mechanism for pre-sealing the post-cast strip of the basement exterior wall and the post-cast strip of the raft slab according to claim 1 is characterized in that: A horizontal long strip protrusion (12) is provided on the top surface of the reinforced concrete unit plate (5), and a horizontal long strip groove (13) is provided on the bottom surface of the reinforced concrete unit plate (5). The upper and lower prefabricated reinforced concrete unit plates (5) are vertically stacked together by engaging the horizontal long strip protrusion (12) and the horizontal long strip groove (13).

3. A sealing plate mechanism for pre-sealing the post-cast strip of the basement exterior wall and the post-cast strip of the raft slab according to claim 1 or 2, characterized in that: A concrete frame of a high-rise main building is arranged on the left side outer wall (2) of the basement, and a concrete frame of a low-rise podium building is arranged on the right side outer wall (3) of the basement.

Images