A closed structure of post-cast strip for settlement of basement exterior wall and its construction method

Abstract

The invention relates to the field of building technology, and discloses a basement settlement post-casting strip structure and a construction method thereof. In an example of the invention, a steel plate welded with vertical steel bars is connected with the longitudinal bars and horizontal bars of the basement settlement post-casting strip to close the open part of the basement outer wall post-casting strip, a waterproofing coil is laid on the settlement post-casting strip steel plate, a first polyurethane sealant, a second polyurethane sealant, a first water-stopping rubber strip and a second water-stopping rubber strip, and then earth is backfilled on the waterproofing coil, and compacted in layers, so that the post-casting strip structure of the invention stops water in advance, and the invention can close the settlement post-casting strip part in advance. After the steel plate welding is completed, a waterproofing layer can be posted, a protective layer can be laid, and time-consuming processes such as brick wall masonry, base treatment, and plastering are omitted, and subsequent processes can be carried out in advance. Earth is backfilled on the outdoor side of the first basement outer wall and the second basement outer wall, and compacted in layers. After reaching a specified time, the post-casting strip is poured.

Description

Technical Field

[0001] The invention relates to the technical field of construction, in particular to a basement settlement post-cast strip structure and a construction method thereof. Background Art

[0002] At present, post-cast strips for basement settlement are a common practice in building structure construction. Post-cast strips are used to eliminate the adverse effects of structural settlement and concrete shrinkage stress. In existing construction, due to the limitation of construction period, the early backfilling technology is basically adopted, that is, after the basement exterior wall is demolished, the prefabricated concrete post-cast strip cover is directly used, or brick wall is used for masonry, and then the exterior wall waterproof structure is separately made.

[0003] The post-casting strip of the basement settlement adopts a prefabricated concrete post-casting strip cover, which increases the amount of steel bars and concrete, and also increases the amount of work that constitutes the solid concrete. The relatively high cost and long construction period. The brick wall waterproofing construction needs to wait until the masonry reaches a certain strength and the surface layer is dry before it can be carried out. The construction period is long, the work efficiency is low, and the waterproof layer is easy to crack. The traditional post-casting strip advance water-stop structure is rigidly connected to the outer wall. The backfill soil settlement and the shrinkage settlement of the structure itself are easy to cause structural cracking and cracking of the waterproof membrane layer, destroying the waterproof structure of the outer wall, and causing quality risks of underground waterproofing projects. Summary of the invention

[0004] The technical problem to be solved by the present invention is that the basement settlement post-cast strip adopts a prefabricated concrete post-cast strip cover plate, which increases the amount of steel bars and concrete, and also increases the amount of work to form the solid concrete, which is relatively costly and has a long construction period. The brick wall waterproofing construction needs to wait until the masonry reaches a certain strength and the plastering layer is dry before it can be carried out. The construction period is long, the work efficiency is low, and the waterproof layer is easy to crack. The traditional post-cast strip advance water-stopping structure is rigidly connected to the outer wall. The backfill soil settlement and the structure's own shrinkage settlement are likely to cause structural cracking and waterproof membrane layer cracking, destroying the outer wall waterproofing structure and causing quality risks for underground waterproofing projects.

[0005] In order to solve the above technical problems, the present invention provides a settlement post-cast strip closing structure, the settlement post-cast strip closing structure has a first direction and a second direction perpendicular to each other, and includes: a first basement outer wall, a second basement outer wall, a steel plate, steel bars, transverse steel bars of the post-cast strip, longitudinal steel bars of the post-cast strip, a first water stop rubber strip, a second water stop rubber strip, a first polyurethane sealant, a second polyurethane sealant, a waterproof membrane and an extruded board; a settlement post-cast strip is arranged between the first basement outer wall and the second basement outer wall, the transverse steel bars of the post-cast strip are arranged in the settlement post-cast strip along the first direction, and the longitudinal steel bars of the post-cast strip are arranged in the settlement post-cast strip along the second direction; the steel plate is covered at the post-cast strip position, and is overlapped with the first basement outer wall and the second basement outer wall respectively; the steel bars are vertically welded and arranged on the steel plate, and the steel bars are Extending into the post-cast strip, the steel bars are respectively welded to the transverse steel bars and the longitudinal steel bars of the post-cast strip, and the steel plate is fixed to the post-cast strip by steel bar welding; the steel plate has a first side and a second side respectively overlapping the first basement outer wall and the second basement outer wall; the first waterstop strip is located between the first basement outer wall and the first side, and the second waterstop strip is located between the second basement outer wall and the second side; the first polyurethane sealant is laid on the outside of the first waterstop strip, and the second polyurethane sealant is laid on the outside of the second waterstop strip; the waterproof membrane is laid on the first basement outer wall, the second basement outer wall, the first polyurethane sealant, the second polyurethane sealant, the first waterstop strip, the steel plate and the second waterstop strip; the extruded board is laid on the waterproof membrane.

[0006] Optionally, the steel bars are fully welded to each other on four sides.

[0007] Optionally, the transverse steel bars of the post-cast strip and the longitudinal steel bars of the post-cast strip are cross-intersected; the steel bars are arranged at the cross-intersection; and the steel bars are spot-welded to the transverse steel bars of the post-cast strip and the longitudinal steel bars of the post-cast strip, respectively.

[0008] Optionally, the waterproof membrane is a self-adhesive polymer modified asphalt polyester waterproof membrane.

[0009] Optionally, the thickness of the waterproof membrane is 2 mm.

[0010] Optionally, a first reserved cavity and a second reserved cavity are provided between the waterproof membrane and the steel plate; the first reserved cavity is located above the first polyurethane sealant; and the second reserved cavity is located above the second polyurethane sealant.

[0011] Optionally, it also includes: a first extruded board, a second extruded board and a third extruded board; the first reserved cavity and the second reserved cavity extend respectively along the first direction to separate the waterproof membrane into a first area, a second area and a third area; the first area, the second area and the third area are spaced apart along the second direction; the first extruded board is laid in the first area, the second extruded board is laid in the second area, and the third extruded board is laid in the third area.

[0012] Optionally, the thickness of the first extruded board, the second extruded board and the third extruded board is 30 mm.

[0013] A construction method for the closed structure of the post-cast strip of the basement outer wall as described above comprises the following steps:

[0014] A settlement post-cast strip is provided between the outer wall of the first basement and the outer wall of the second basement;

[0015] Arranging a post-cast strip transverse reinforcement extending in a first direction and a post-cast strip longitudinal reinforcement extending in a second direction in the settlement post-cast strip;

[0016] A first waterproof adhesive strip is pasted on the bottom surface of the first side of the steel plate, and a second waterproof adhesive strip is pasted on the bottom surface of the second side of the steel plate, wherein the waterproof adhesive strip is located between the outer side of the basement and the steel plate;

[0017] Weld the steel bars to the transverse steel bars and the longitudinal steel bars of the post-casting strip respectively;

[0018] The first side and the second side of the steel plate are welded to the transverse steel bars of the post-casting strip extending in the first direction and the longitudinal steel bars of the post-casting strip extending in the second direction by steel bars, so as to fix the settlement post-casting strip between the first basement outer wall and the second basement outer wall;

[0019] Laying the first polyurethane sealant on the first waterproof strip, and laying the second polyurethane sealant on the second waterproof strip;

[0020] The waterproof membrane is folded and laid at the junction of the first basement outer wall, the first polyurethane sealant and the first side steel plate and at the junction of the second basement outer wall, the second polyurethane sealant and the second side steel plate.

[0021] Lay extruded board on the waterproof membrane as a protective layer;

[0022] Backfill soil on one side of the extruded board and compact it layer by layer.

[0023] Optionally, the step of welding the steel bars to the transverse steel bars and the longitudinal steel bars of the post-casting strip respectively specifically includes:

[0024] Insert the steel bars into the nodes formed by the cross intersection between the transverse steel bars of the post-casting strip and the longitudinal steel bars of the post-casting strip, tie the steel bars to the transverse steel bars of the post-casting strip and the longitudinal steel bars of the post-casting strip with steel wires, and spot weld the steel bars to the transverse steel bars of the post-casting strip and the longitudinal steel bars of the post-casting strip.

[0025] Compared with the prior art, the basement settlement post-casting belt enclosed structure and waterproof reservation construction method of the embodiment of the present invention have the following beneficial effects:

[0026] The embodiment of the present invention firstly sets a first waterproof strip on the bottom surface of the first side of the steel plate, sets a second waterproof strip on the bottom surface of the second side of the steel plate, and welds the steel plate to the transverse steel bars and the longitudinal steel bars of the post-casting strip through steel bars, so that the steel plate is fixedly connected to the first basement outer wall and the second basement outer wall through the steel bars, the transverse axis and the longitudinal axis, respectively, and the first polyurethane sealant is laid on the first waterproof strip and the first basement outer wall, and the second polyurethane sealant is laid on the second waterproof strip and the second basement outer wall, so as to improve the sealing between the first waterproof strip and the first basement outer wall and the sealing between the second waterproof strip and the second basement outer wall. The first waterproof strip and the second waterproof strip are respectively pressed against the first basement outer wall and the second basement outer wall through the steel plate, so as to improve the sealing of the steel plates against the first basement outer wall and the second basement outer wall at one time. Secondly, the present application also lays the waterproof membrane on the exterior wall, the first polyurethane sealant, the second polyurethane sealant, the first waterstop strip and the second waterstop strip, and folds and reserves the laying of the waterproof membrane at the junction of the first basement exterior wall, the first polyurethane sealant, the first side steel plate and the second basement exterior wall, the second polyurethane sealant, and the second side steel plate, and pastes the extruded board on the waterproof membrane as a protective layer, and then backfills the earth and compacts it layer by layer, so that the closed structure of the post-cast strip of the present application has a multiple waterproof structure, so that the present invention can close the post-cast strip in advance, and the waterproof layer can be posted after the steel plate welding is completed, and the protective layer can be laid, omitting the time-consuming processes such as brick wall masonry, base treatment, and plastering, and the subsequent processes can be carried out in advance, and the earth is backfilled on the exterior walls of the first basement and the second basement, and the layers are compacted, and the post-cast strip is poured at the specified time. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1 is a side view of an embodiment of the present invention;

[0028] Figure 2 yes Figure 1 A is an enlarged schematic diagram;

[0029] Figure 3 yes Figure 1 A magnified schematic diagram of B;

[0030] Figure 4It is a flow chart of a post-cast strip enclosing structure and a waterproof pre-reservation construction method thereof in an embodiment of the present invention.

[0031] In the figure, 1. first basement exterior wall; 2. second basement exterior wall; 3. steel plate; 4. steel bar; 5. first waterstop strip; 6. second waterstop strip; 7. first polyurethane sealant; 8. second polyurethane sealant; 9. waterproof membrane; 10. post-cast strip; 11. transverse steel bar of post-cast strip; 12. longitudinal steel bar of post-cast strip; 15. first extruded board; 16. second extruded board; 17. third extruded board; 18. first reserved cavity; 19. second reserved cavity. DETAILED DESCRIPTION

[0032] The specific implementation of the present invention is further described in detail below in conjunction with the accompanying drawings and examples. The following examples are used to illustrate the present invention, but are not intended to limit the scope of the present invention.

[0033] First, it should be noted that the top, bottom, upward, downward and other directions mentioned in this article are defined relative to the directions in the respective drawings, and they are relative concepts, and therefore can be changed according to different positions and different practical states. Therefore, these or other directions should not be understood as restrictive terms.

[0034] It should be noted that the term "comprising" does not exclude other elements or steps and "a" or "an" does not exclude a plurality.

[0035] In addition, it should be pointed out that any single technical feature described or implied in the embodiments of this document, or any single technical feature shown or implied in the accompanying drawings, can still be combined between these technical features (or their equivalents) to obtain other embodiments of the present application that are not directly mentioned in this document.

[0036] It should also be understood that the terms "first", "second", etc. are used herein to describe various information, but such information should not be limited to these terms, which are only used to distinguish the same type of information from each other. For example, without departing from the scope of this application, "first" information may also be referred to as "second" information, and similarly, "second" information may also be referred to as "first" information.

[0037] It should be noted that in different drawings, the same reference numerals denote the same or substantially the same components.

[0038] like Figure 1-Figure 4As shown, a post-cast strip 10 structure of a preferred embodiment of the present invention has a first direction and a second direction perpendicular to each other. The post-cast strip 10 structure includes: a first basement exterior wall 1, a second basement exterior wall 2, a steel plate 3, steel bars 4, a post-cast strip transverse steel bars 11, a post-cast strip longitudinal steel bars 12, a first water stop rubber strip 5, a second water stop rubber strip 6, a first polyurethane sealant 7, a second polyurethane sealant 8 and a waterproof roll 9. A post-cast strip 10 is arranged between the first basement exterior wall 1 and the second basement exterior wall 2, and a post-cast strip transverse steel bars 11 extending along the first direction and a post-cast strip longitudinal steel bars 12 extending along the second direction are arranged in the post-cast strip 10. Both sides of the steel plate 3 are covered on the first basement exterior wall 1 and the second basement exterior wall 2. The steel bars 4 are arranged on the steel plate 3, and a plurality of the steel bars 4 extend into the post-cast strip 10, and the steel bars 4 are welded to the post-cast strip transverse steel bars 11 and the post-cast strip longitudinal steel bars 12, respectively. The steel plate 3 has a first side and a second side that overlap the first basement exterior wall 1 and the second basement exterior wall 2, respectively. The first waterproofing strip 5 is attached to the bottom surface of the first side of the steel plate, and is located between the first side of the steel plate 3 and the first basement exterior wall 1, and the second waterproofing strip 6 is attached to the bottom surface of the second side of the steel plate, and is located between the second side of the steel plate 3 and the second basement exterior wall 2. The first polyurethane sealant 7 is laid on the first waterproofing strip 5 and the first basement exterior wall 1, and the second polyurethane sealant 8 is laid on the second waterproofing strip 6 and the second basement exterior wall 2. The waterproofing membrane 9 is laid on the first basement exterior wall 1, the second basement exterior wall 2, the first polyurethane sealant 7, the second polyurethane sealant 8, the first waterproofing strip 5, the second waterproofing strip 6 and the steel plate 3, and the extruded board is laid on the waterproofing membrane.

[0039] The first direction extends in the horizontal direction, and the second direction extends in the vertical direction, so that the longitudinal steel bars 12 of the post-cast strip and the transverse steel bars 11 of the post-cast strip cross each other.

[0040] Based on the above structure, the present application first sets a first waterproof strip 5 on the bottom surface of the first side of the steel plate 3, and sets a second waterproof strip 6 on the bottom surface of the second side of the steel plate 3. The first waterproof strip 5 is adhered to the bottom surface of the first side of the steel plate, and is located between the first side of the steel plate 3 and the first basement outer wall 1. The second waterproof strip 6 is adhered to the bottom surface of the second side of the steel plate, and is located between the second side of the steel plate 3 and the second basement outer wall 2. The first polyurethane sealant 7 is laid on the first waterproof strip 5 and the first basement outer wall 1, and the second polyurethane sealant 8 is laid on the second waterproof strip 6 and the second basement outer wall 2, so as to improve the sealing between the first waterproof strip 5 and the first basement outer wall 1 and the sealing between the second waterproof strip 6 and the second basement outer wall 2. The steel bars 4 are welded to the transverse steel bars 11 and the longitudinal steel bars 12 of the post-cast strip respectively, so that the steel plates 3 are fixedly connected to the first basement outer wall 1 and the second basement outer wall 2 respectively through the steel bars 4, the transverse steel bars 11 and the longitudinal steel bars 12 of the post-cast strip, so that the steel plates 3 are pressed tightly to the first basement outer wall 1 and the second basement outer wall 2 respectively through the first water stop strip 5 and the second water stop strip 6, so as to improve the sealing performance of the steel plates 3 to the first basement outer wall 1 and the second basement outer wall 2 respectively. Secondly, the present application also lays the waterproof membrane 9 on the first basement exterior wall 1, the second basement exterior wall 2, the first polyurethane sealant 7, the second polyurethane sealant 8, the first waterstop strip 5 and the second waterstop strip 6, and arranges an extruded board on the top of the waterproof membrane 9, and then backfills the earth on the extruded board and compacts it layer by layer, so that the post-cast strip 10 structure of the present application has a multiple waterproof structure. The present invention can close the post-cast strip 10 in advance, and the waterproof membrane 9 can be posted after the welding of the steel plate 3 is completed, omitting the time-consuming processes such as brick wall masonry, base treatment, and plastering. The subsequent processes can be carried out in advance, and the soil is backfilled in layers on the extruded boards of the first basement exterior wall 1 and the second basement exterior wall 2, and the post-cast strip 10 is poured at the specified time.

[0041] Among them, polyurethane sealant has excellent wear resistance; low temperature flexibility; a wide range of adjustable performance; high mechanical strength; good adhesion; good elasticity, excellent recovery, and is suitable for dynamic joints; good weather resistance, with a service life of up to 15 to 20 years; excellent oil resistance; resistance to biological aging; and a moderate price.

[0042] Furthermore, the steel bars 4 are fully welded to the steel plate 3 on four sides. The full welding can completely fuse the steel bars 4 and the steel plate 3 during the welding process to form a seamless connection, so that the steel plate 3 and the steel bars 4 have better strength and air tightness after welding.

[0043] Furthermore, the post-casting strip transverse reinforcement 11 and the post-casting strip longitudinal reinforcement 12 are cross-intersected to form a node. The reinforcement 4 is arranged at the node, and the reinforcement 4 is spot-welded to the post-casting strip transverse reinforcement 11 and the post-casting strip longitudinal reinforcement 12, respectively, so that the reinforcement 4 can be welded to the post-casting strip longitudinal reinforcement 12 and the post-casting strip transverse reinforcement 11, respectively.

[0044] In a possible embodiment, the waterproof membrane 9 is a self-adhesive polymer modified asphalt polyester waterproof membrane 9 to form an integral waterproof layer.

[0045] Furthermore, the thickness of the waterproof coiled material 9 is 2 mm.

[0046] In a possible embodiment, a first reserved cavity 18 and a second reserved cavity 19 are provided between the waterproof membrane 9 and the steel plate 3. The first reserved cavity 18 is located above the first polyurethane sealant 7, and the second reserved cavity 19 is located above the second polyurethane sealant 8. The first reserved cavity 18 and the second reserved cavity 19 are used to prevent the waterproof membrane 9 from being torn and damaged during the settling of the steel plate 3.

[0047] In order to further improve the sealing performance between the steel plate 3 and the first basement outer wall 1 and the second basement outer wall 2, the extruded plate includes: a first extruded plate 15, a second extruded plate 16 and a third extruded plate 17. The first reserved cavity 18 and the second reserved cavity 19 extend respectively along the first direction to separate the waterproofing membrane 9 into a first area, a second area and a third area; the first area, the second area and the third area are arranged at intervals along the second direction; the first extruded plate 15 is laid in the first area, the second extruded plate 16 is laid in the second area, and the third extruded plate 17 is laid in the third area. The first extruded plate 15, the second extruded plate 16 and the third extruded plate 17 can, on the one hand, play the effect of pressing the waterproofing membrane 9 on the first basement outer wall 1, the steel plate and the second basement outer wall 2, and at the same time, can again press the first polyurethane sealant 7 on the first basement outer wall 1 and the first water stop strip 5, and press the second polyurethane sealant 8 on the second basement outer wall 2 and the second water stop strip 6.

[0048] Specifically, the first reserved cavity 18 is located between the first extruded plate 15 and the second extruded plate 16, and the second reserved cavity 19 is located between the second extruded plate 16 and the third extruded plate 17, so that the first extruded plate 15, the second extruded plate 16 and the third extruded plate 17 can always fit the waterproof membrane 9 during the sedimentation process of the steel plate 3.

[0049] Furthermore, the thickness of the first extruded board 15, the second extruded board 16 and the third extruded board 17 is 30 mm.

[0050] The present invention also provides a construction method of the post-cast strip structure as described above, which comprises the following steps:

[0051] A post-cast strip 10 is provided between the first basement outer wall 1 and the second basement outer wall 2 .

[0052] The post-cast strip 10 is provided with a post-cast strip transverse reinforcement 11 extending along a first direction and a post-cast strip longitudinal reinforcement 12 extending along a second direction.

[0053] A first waterproof rubber strip 5 is disposed on the bottom surface of the first side of the steel plate 3 , and a second waterproof rubber strip 6 is disposed on the bottom surface of the second side of the steel plate 3 .

[0054] The first waterproof strip 5 is located between the first side of the steel plate 3 and the first basement outer wall 1 , and the second waterproof strip 6 is located between the second side of the steel plate 3 and the second basement outer wall 2 .

[0055] The first polyurethane sealant 7 is laid on the first waterproof adhesive strip 5 , and the second polyurethane sealant 8 is laid on the second waterproof adhesive strip 6 .

[0056] The steel bars 4 are welded to the post-casting zone transverse steel bars 11 and the post-casting zone longitudinal steel bars 12 respectively.

[0057] The waterproof coiled material 9 is laid on the exterior wall, the first polyurethane sealant 7 , the second polyurethane sealant 8 , the first water stop rubber strip 5 , the second water stop rubber strip 6 and the steel plate 3 .

[0058] The extruded board is pasted on the waterproof membrane 9.

[0059] Backfill soil on one side of the extruded board and compact it layer by layer.

[0060] In summary, the embodiment of the present invention provides a post-cast strip 10 structure and a construction method thereof, wherein the waterproofing membrane 9 is laid on the exterior wall, the first polyurethane sealant 7, the second polyurethane sealant 8, the first water stop rubber strip 5, the second water stop rubber strip 6 and the steel plate 3, and the first waterproofing membrane 13 and the second waterproofing membrane 14 are folded and laid at the junction of the first basement exterior wall, the first polyurethane sealant and the first side steel plate and the second basement exterior wall, the second polyurethane sealant and the second side steel plate, and then the first extruded board 15 is pasted on the waterproofing membrane 9. , the second extruded board 16 and the third extruded board 17, backfill the earth, and compact it layer by layer, so that the post-cast strip 10 structure of the present application has a multiple waterproof structure, so that the present invention can close the post-cast strip 10 in advance, and the waterproof layer can be pasted after the welding of the steel plate 3 is completed, and the time-consuming processes such as brick wall masonry, base treatment, and plastering are omitted. The subsequent processes can be carried out in advance, and the first extruded board 15, the second extruded board 16 and the third extruded board 17 of the first basement exterior wall 1 and the second basement exterior wall 2 are backfilled with earth in layers, and the post-cast strip 10 is poured at the specified time.

[0061] The above is only a preferred embodiment of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and substitutions can be made without departing from the technical principles of the present invention. These improvements and substitutions should also be regarded as the scope of protection of the present invention.

Claims

1. A closed structure of a post-cast strip for a basement exterior wall, wherein the closed structure has a first direction and a second direction perpendicular to each other, and is characterized in that: include: The first basement exterior wall, the second basement exterior wall, a steel plate, steel bars, transverse steel bars of a post-cast strip, longitudinal steel bars of a post-cast strip, a first water stop rubber strip, a second water stop rubber strip, a first polyurethane sealant, a second polyurethane sealant, a waterproof membrane and an extruded board; a settlement post-cast strip is arranged between the first basement exterior wall and the second basement exterior wall, the transverse steel bars of the post-cast strip are arranged in the settlement post-cast strip along the first direction, and the longitudinal steel bars of the post-cast strip are arranged in the settlement post-cast strip along the second direction; the steel plate is covered at the post-cast strip position, and overlaps with the first basement exterior wall and the second basement exterior wall respectively; the steel bars are vertically welded on the steel plate, the steel bars extend into the post-cast strip, and the steel bars are respectively connected to the transverse steel bars and the post-cast strip The longitudinal steel bars of the pouring strip are welded, and the steel plate is fixed to the post-pouring strip by steel bar welding; the steel plate has a first side and a second side respectively overlapped with the first basement outer wall and the second basement outer wall; the first water-stopping strip is located between the first basement outer wall and the first side, and the second water-stopping strip is located between the second basement outer wall and the second side; the first polyurethane sealant is laid on the outside of the first water-stopping strip, and the second polyurethane sealant is laid on the outside of the second water-stopping strip; the waterproof membrane is laid on the first basement outer wall, the second basement outer wall, the first polyurethane sealant, the second polyurethane sealant, the first water-stopping strip, the steel plate and the second water-stopping strip; the extruded board is laid on the waterproof membrane; The first polyurethane sealant is laid on the first waterproof strip and the first basement outer wall to improve the sealing between the first waterproof strip and the first basement outer wall and the sealing between the first waterproof strip and the steel plate, and the second polyurethane sealant is laid on the second waterproof strip and the second basement outer wall to improve the sealing between the second waterproof strip and the second basement outer wall and the sealing between the second waterproof strip and the steel plate; A first reserved cavity and a second reserved cavity are provided between the waterproof coiled material and the steel plate; The first reserved cavity is located above the first polyurethane sealant; The second reserved cavity is located above the second polyurethane sealant; The extruded plate comprises: a first extruded plate, a second extruded plate and a third extruded plate; The first reserved cavity and the second reserved cavity extend respectively along the first direction to separate the waterproof membrane into a first area, a second area and a third area; the first area, the second area and the third area are spaced apart along the second direction; the first extruded board is laid in the first area, the second extruded board is laid in the second area, and the third extruded board is laid in the third area.

2. The basement exterior wall settlement post-cast strip enclosed structure according to claim 1 is characterized in that: The steel bars are fully welded to the steel plates on four sides.

3. The basement exterior wall settlement post-cast strip enclosed structure according to claim 1, characterized in that: A cross is formed between the transverse steel bars of the post-cast strip and the longitudinal steel bars of the post-cast strip; the steel bars are arranged at the cross; and the steel bars are spot-welded to the transverse steel bars of the post-cast strip and the longitudinal steel bars of the post-cast strip, respectively.

4. The basement exterior wall settlement post-cast strip enclosed structure according to claim 1, characterized in that: The waterproofing membrane is a self-adhesive polymer modified asphalt polyester waterproofing membrane.

5. The basement exterior wall settlement post-cast strip enclosed structure according to claim 1, characterized in that: The thickness of the waterproof coiled material is 2 mm.

6. The basement exterior wall settlement post-cast strip enclosed structure according to claim 1, characterized in that: The thickness of the first extruded board, the second extruded board and the third extruded board is 30 mm.

7. A construction method for a closed structure of a post-casting strip of a basement exterior wall as claimed in any one of claims 1 to 6, characterized in that: The following steps are involved: A post-settlement cast-in-place strip is provided between the outer wall of the first basement and the outer wall of the second basement; A post-cast strip transverse reinforcement extending in a first direction and a post-cast strip longitudinal reinforcement extending in a second direction are arranged in the post-cast strip; Fully weld the steel bars all around and vertically weld them to the steel plate; A first waterproof adhesive strip is pasted on the bottom surface of the first side of the steel plate, and a second waterproof adhesive strip is pasted on the bottom surface of the second side of the steel plate, wherein the waterproof adhesive strip is located between the outer side of the basement and the steel plate; The first side and the second side of the steel plate are welded to the transverse steel bars of the post-casting strip extending in the first direction and the longitudinal steel bars of the post-casting strip extending in the second direction by steel bars, so as to fix the settlement post-casting strip between the first basement outer wall and the second basement outer wall; Laying the first polyurethane sealant on the first waterproof strip, and laying the second polyurethane sealant on the second waterproof strip; Laying the waterproofing membrane on the exterior wall, the first polyurethane sealant, the second polyurethane sealant, and the exterior wall of the first basement and the exterior wall of the second basement; The waterproofing membrane is folded and laid at the junction of the first basement outer wall, the first polyurethane sealant, and the first side steel plate, and at the junction of the second basement outer wall, the second polyurethane sealant, and the second side steel plate; Lay extruded board on the waterproof membrane as a protective layer; Backfill soil on one side of the extruded board and compact it layer by layer.

8. The construction method of the closed structure of the post-casting strip of the basement outer wall according to claim 7 is characterized in that: The step of welding the steel bars to the transverse steel bars and the longitudinal steel bars of the post-casting strip respectively specifically includes: Insert the steel bars into the nodes formed by the cross-intersection of the transverse steel bars and the longitudinal steel bars of the post-cast strip, tie the steel bars to the transverse axis and the longitudinal axis respectively with steel wire, and connect the steel bars to the transverse axis and the longitudinal axis respectively by spot welding.

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