Basement outer wall post-cast strip waterproof additional structure and construction method thereof

Abstract

The invention provides a basement exterior wall post-cast strip waterproof additional structure and a construction method thereof.The basement exterior wall post-cast strip waterproof additional structure comprises an outer side formwork arranged at a post-cast strip, the outer side formwork comprises a formwork unit and an n-shaped clamp, and the formwork unit comprises a first oblique-crossing check block, a second oblique-crossing check block and a third oblique-crossing check block which are sequentially connected side by side; the first oblique-crossing check block and the second oblique-crossing check block are in sliding connection in the vertical direction through a sliding groove and sliding block mechanism, the second oblique-crossing check block and the third oblique-crossing check block are in sliding connection in the vertical direction through a sliding groove and sliding block mechanism, the multiple formwork units are arranged in an up-down aligned and stacked mode, and the distance between the two vertical side walls of each n-shaped clamp is consistent with the length of the corresponding formwork unit. The n-shaped clamp is installed at the joint of every two vertically-adjacent formwork units, and the formwork units are fixed to the basement outer wall through the transverse unfolding pieces on the two sides of the n-shaped clamp. The method can effectively shorten the backfilling waiting time of the basement outer wall fertilizer groove, facilitates the relevant professional construction operation of the subsequent process, and reduces the project construction period cost.

Description

Technical Field

[0001] This invention belongs to the field of building construction technology, and in particular relates to a waterproof additional structure for post-pouring strips on basement exterior walls and its construction method. Background Technology

[0002] Post-cast strips on the exterior walls of underground parking garages are divided into temperature-controlled post-cast strips and settlement-controlled post-cast strips. Temperature-controlled post-cast strips are generally poured 45 days after the concrete on both sides is poured, while settlement-controlled post-cast strips are generally poured after the main structure is capped and the settlement on both sides of the structure has stabilized. Backfilling of the garage trench can only proceed after these strips have cured. Furthermore, because traditional formwork for the exterior walls of post-cast strips lacks a waterproof reinforcement layer, water seepage and leakage are highly likely to occur. Therefore, reducing the waiting time for backfilling and minimizing the probability of water seepage and leakage at the post-cast strip locations have become key challenges in the construction of basement exterior wall post-cast strips. Summary of the Invention

[0003] To solve the above-mentioned technical problems, the present invention provides a waterproof additional structure for the post-pouring strip of the basement exterior wall and its construction method. It can effectively reduce the waiting time for backfilling the trench, facilitate subsequent construction operations, and increase the waterproof sealing of the post-pouring strip location. It has the advantages of strong practicality and good waterproof effect.

[0004] The technical solution adopted by this invention to solve its technical problem is:

[0005] A waterproof additional structure for a post-pouring strip on a basement exterior wall includes an outer template installed at the post-pouring strip. The outer template includes template units and U-shaped clips. Each template unit includes a first oblique stop block, a second oblique stop block, and a third oblique stop block connected in parallel. The first oblique stop block and the second oblique stop block, as well as the second oblique stop block and the third oblique stop block, are vertically slidably connected via a sliding groove and slider mechanism. Multiple template units are stacked vertically aligned. The distance between the two vertical sidewalls of the U-shaped clip is the same as the length of the template unit. The U-shaped clip is installed at the joint between two adjacent template units and the template unit is fixed to the basement exterior wall by the horizontal expansion pieces on both sides of the clip.

[0006] Optionally, the slide block mechanism includes a matching dovetail slide and a dovetail slider.

[0007] Optionally, the connection between the first oblique block and the second oblique block, and the connection between the second oblique block and the third oblique block, are coated with flexible waterproof coating.

[0008] Optionally, the structure also includes a steel reinforcement clamp on the side of the uppermost template unit facing the basement exterior wall, the steel reinforcement clamp being engaged with the horizontal steel reinforcement of the exterior wall through a groove thereon.

[0009] Optionally, the structure also includes several U-shaped clips, which are fixed to the concrete pad at the post-cast strip of the outer wall with their openings facing upwards, and the bottom of the lowest template unit is clipped into the U-shaped clip.

[0010] Optionally, a rubber waterstop is provided at the bottom of the lowest template unit.

[0011] Optionally, flexible waterproof coating is applied to the joints between the first, second, and third oblique blocks and the Z-shaped and U-shaped clips, and waterproof sealant is applied from bottom to top at the inside corners between the first and third oblique blocks and the outer walls on both sides of the post-pouring strip.

[0012] Optionally, the first, second, and third oblique blocks are all made of cast concrete.

[0013] Optionally, the second oblique stop block is provided with a number of tie bolts to fix the reinforcing bars at intervals.

[0014] Accordingly, the present invention also provides a construction method for a waterproof additional structure for a post-cast strip on the exterior wall of a basement, comprising the following steps:

[0015] S1. Mark the installation position of the outer formwork at the post-pouring strip of the outer wall, embed the U-shaped clip in the concrete pad at the post-pouring strip of the outer wall, and make the opening of the U-shaped clip extend out of the concrete pad and be located at the installation position of the outer formwork.

[0016] S2. Clean the surface slag on both sides of the waterstop steel plate at the post-cast strip of the exterior wall, roughen and clean to expose the coarse aggregate of the concrete, and evenly lay rubber waterstop at the outer formwork installation position on the concrete cushion.

[0017] S3. Apply flexible waterproof coating to the connection between the first and second oblique blocks and the connection between the second and third oblique blocks. Connect the first, second, and third oblique blocks side by side to form a template unit. Place the bottom template unit on the rubber waterstop and secure it in the U-shaped clip. Then, stack the next template unit on top of the bottom template unit. Install the Z-shaped clip at the joint between the two template units and fix the two template units to the basement exterior wall using the horizontal expansion pieces on both sides. Repeat this process until all template units are installed.

[0018] The beneficial effects of the present invention are as follows: By designing the structure of the template unit, the first skew block and the second skew block, as well as the second skew block and the third skew block, are connected through a chute-slider mechanism. There is no rigid connection between the three skew blocks of the template unit, and the skew blocks can slide vertically relative to each other. At the same time, two adjacent upper and lower template units are fixed to the basement exterior wall through the U-shaped cards installed at their joints. In this way, a closed structure can be formed on the outside of the exterior wall post-cast strip before pouring, and the earthwork backfilling operation can be carried out in advance. Even if uneven settlement occurs on both sides of the exterior wall post-cast strip later, the present invention can still maintain the strength and stability of the device itself through the U-shaped cards and the skew blocks, without forming large-scale running and loosening, without falling off, and without affecting the overall structure. Even under the lateral pressure of the backfill soil, it can still maintain its integrity and waterproof sealing performance. After installing the device at the exterior wall post-cast strip, the backfilling operation of the side ditches around the basement can be carried out in advance, facilitating subsequent construction, reducing the construction period cost, and reducing the input of materials, equipment and manpower. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] The present invention will be further described below in conjunction with the drawings and embodiments. In the drawings:

[0020] Figure 1 is a cross-sectional view of the position of the exterior wall post-cast strip provided by an embodiment of the present invention;

[0021] Figure 2 is an elevation view of the position of the exterior wall post-cast strip provided by an embodiment of the present invention;

[0022] Figure 3 is a longitudinal sectional view of the position of the exterior wall post-cast strip provided by an embodiment of the present invention;

[0023] Figure 4 is a schematic structural view of the template unit in an embodiment of the present invention;

[0024] Figure 5 is a schematic structural view of the first skew block in an embodiment of the present invention;

[0025] Figure 6 is a schematic structural view of the second skew block in an embodiment of the present invention;

[0026] Figure 7 is a schematic structural view of the third skew block in an embodiment of the present invention;

[0027] Figure 8 is a schematic structural view of the U-shaped card in an embodiment of the present invention;

[0028] Figure 9 is a schematic structural view of the U-shaped clip in an embodiment of the present invention;

[0029] Figure 10This is a schematic diagram of the pre-embedding of the U-shaped card in an embodiment of the present invention.

[0030] In the diagram: 1-Vertical reinforcement of the exterior wall; 2-Horizontal reinforcement of the exterior wall; 3-Waterstop steel plate; 4-First oblique stop block; 5-Second oblique stop block; 6-Third oblique stop block; 7-Expansion waterstop strip; 8-Flexible waterproof coating; 9-Reinforcement bars fixed by tie bolts; 10-Fixing nail; 11-Z-shaped clip; 12-Waterproof sealant; 13-U-shaped clip; 14-Rubber waterstop strip; 15-Reinforcement bar clip; 16-Concrete pad at the post-cast strip of the exterior wall. Detailed Implementation

[0031] To make the objectives, technical solutions, and advantages of this invention clearer, the technical solutions of the embodiments of this invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of this invention. Based on the embodiments of this invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this invention.

[0032] In the description of this invention, it should be noted that the terms "center," "longitudinal," "lateral," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this invention. In addition, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0033] In the description of this invention, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal communication between two components. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances. Furthermore, in the description of this invention, unless otherwise stated, "a plurality of" or "several" means two or more.

[0034] like Figures 1-10As shown, the present invention provides a waterproof additional structure for the post-pouring strip of a basement exterior wall, including an outer template set at the post-pouring strip. The outer template includes template units and U-shaped clips 11. The template unit includes a first oblique block 4, a second oblique block 5, and a third oblique block 6 connected side by side in sequence. The first oblique block 4 and the second oblique block 5, and the second oblique block 5 and the third oblique block 6 are vertically slidably connected by a sliding groove slider mechanism. Multiple template units are stacked vertically aligned. The distance between the two vertical sidewalls of the U-shaped clip 11 is the same as the length of the template unit. The U-shaped clip 11 is installed at the joint of two adjacent template units and the template unit is fixed to the basement exterior wall by the horizontal expansion pieces on both sides of it.

[0035] like Figure 1 , Figure 2 , Figure 8 As shown, the Z-shaped clip is made of Z-shaped galvanized steel and includes a bottom wall, vertical side walls on both sides of the bottom wall, and horizontal tabs on each vertical side wall. The groove formed by the bottom wall and the vertical side walls can accommodate the template unit. The horizontal tabs on both sides can be fixed to the basement exterior wall by fixing nails 10. The bottom of the lowest template unit can also be fixed to the basement exterior wall by the Z-shaped clip.

[0036] In one embodiment, such as Figures 4-7 As shown, the first oblique block 4, the second oblique block 5, and the third oblique block 6 are all made of concrete and have the characteristics of high compressive strength and good toughness. They can not only resist the pressure of the surrounding soil, but also serve as the external formwork structure for the post-cast strip of the exterior wall.

[0037] In one embodiment, such as Figure 4 As shown, several tie bolt fixing steel bars 9 are spaced apart within the second oblique block 5. During the subsequent pouring of the external wall post-cast concrete, these pre-reserved tie bolt fixing steel bars can be used as fixing points for the tie bolts, ensuring the quality of the formwork and avoiding defects such as misalignment and honeycomb surface in the external wall post-cast strip caused by insecure tie bolt fixing points. The tie bolt fixing steel bars can also be pre-embedded in the first, second, and / or third oblique blocks. Considering that the second oblique block is located in the middle, the effect is better; therefore, two tie bolt fixing steel bars can be pre-embedded in the middle position of the second oblique block.

[0038] In one embodiment, such as Figure 4As shown, the slide-slider mechanism includes a matching dovetail slide and a dovetail slider, which prevents the second oblique stop from falling off the first and third oblique stops, ensuring a stable connection. Specifically, the dovetail slide is vertically positioned on the sides of the first and third oblique stops, and the dovetail slider is vertically positioned on the side of the second oblique stop. When the first, second, and third oblique stops are connected as a whole, they form a cuboid template unit.

[0039] To facilitate the positioning and splicing of the upper and lower template units, such as Figures 5-7 As shown, the upper and lower ends of the first oblique stop block, the second oblique stop block and the third oblique stop block are provided with matching notches.

[0040] In one embodiment, such as Figure 1 As shown, the connection between the first oblique block 4 and the second oblique block 5, and the connection between the second oblique block 5 and the third oblique block 6, are all coated with flexible waterproof coating 8 to form a waterproof layer with good waterproof performance, which can prevent groundwater from entering the basement from the post-pouring strip.

[0041] In one embodiment, such as Figure 3 , Figure 4 As shown, the structure also includes a steel bar clip 15 set on the side of the topmost template unit facing the basement exterior wall. The steel bar clip 15 is clamped onto the horizontal steel bar 2 of the exterior wall through the groove set thereon, forming a fixed positioning whole. It can keep the vertical and horizontal connection of the outer template firm even after uneven settlement occurs on both sides of the post-pouring strip, so as not to cause large-scale dragging and loosening, resulting in detachment and affecting the overall structure.

[0042] In one embodiment, such as Figure 2 , Figure 3 , Figure 9 , Figure 10 As shown, the structure also includes several U-shaped clips 13. The U-shaped clips 13 are fixed to the concrete pad 16 at the post-cast strip of the outer wall with their openings facing upwards. The bottom of the lowest template unit is clipped into the U-shaped clip 13. The U-shaped clips are pre-embedded in the pad layer and can be used to position and fix the outer template. In this embodiment, the U-shaped clips are made of U-shaped galvanized steel clips, and there are two of them.

[0043] In one embodiment, such as Figure 2 , Figure 3 , Figure 10 As shown, a rubber waterstop 14 is installed at the bottom of the lowest template unit for further waterproofing.

[0044] In one embodiment, such as Figure 1As shown, the joints of the first oblique block 4, the second oblique block 5, and the third oblique block 6 with the Z-shaped clip 11 and the U-shaped clip 13 are coated with flexible waterproof coating 8. Waterproof sealant 12 is applied from bottom to top at the inside corners between the first oblique block 4, the third oblique block 6 and the outer walls on both sides of the post-pouring strip, forming multiple waterproof layers, which can have better waterproof performance and can prevent groundwater from entering the basement from the post-pouring strip.

[0045] like Figures 1-10 As shown, the present invention also provides a construction method for a waterproof additional structure for a post-cast strip on the exterior wall of a basement, comprising the following steps:

[0046] S1. Mark the installation position of the outer formwork at the post-pouring strip of the outer wall, embed the U-shaped clip 13 in the concrete pad 16 at the post-pouring strip of the outer wall, and make the opening of the U-shaped clip 13 extend out of the concrete pad and be located at the installation position of the outer formwork.

[0047] S2. Clean the surface slag on both sides of the concrete surface of the waterstop steel plate 3 at the post-pouring strip position of the exterior wall, roughen and clean to expose the coarse aggregate of the concrete, and evenly lay the rubber waterstop 14 at the outer formwork installation position on the concrete cushion layer.

[0048] S3. Apply flexible waterproof coating 8 to the connection between the first oblique block 4 and the second oblique block 5, and the connection between the second oblique block 5 and the third oblique block 6. Connect the first oblique block 4, the second oblique block 5 and the third oblique block 6 side by side to form a template unit. Place the bottom template unit on the rubber waterstop 14 and lock it in the U-shaped clip 13. Then stack the next template unit on the bottom template unit. Install the Z-shaped clip 11 at the joint of the two template units and fix the two template units to the basement exterior wall through the horizontal expansion pieces on both sides. Repeat this process until all template units are installed.

[0049] This invention can be installed after the formwork is removed from the exterior wall and before the pouring of the post-pouring strip, forming a closed structure on the outside of the post-pouring strip area of ​​the exterior wall, so that the earthwork backfilling operation can be carried out in advance and the waiting time for backfilling the trench can be shortened; at the same time, through the rubber waterstop, flexible waterproof coating, waterproof sealant and other materials, a multi-layer waterproof structure is formed, which can effectively prevent external groundwater from entering the room through the post-pouring strip, and achieve a good waterproof effect.

[0050] like Figures 1-3 As shown, the construction method for the waterproof additional structure of the post-cast strip of the basement exterior wall provided by the present invention may include the following detailed steps in its specific implementation:

[0051] Step 1: According to the design, make the template, pour the first oblique block 4, the second oblique block 5 and the third oblique block 6, and pre-embed tie bolts to fix the steel bars 9 at uniform intervals;

[0052] Step 2: Determine the marking and positioning, and embed the U-shaped clip 13 in the concrete pad 16 at the post-pouring strip of the outer wall;

[0053] Step 3: During the pouring of the external wall at the post-pouring strip, formwork strips are embedded on both sides of the external wall. After the external wall formwork is removed, the formwork strips are removed and expansion waterstop strips 7 are installed.

[0054] Part Four: Measurement and Positioning. Mark the installation position and affected area of ​​the formwork unit at the post-pouring strip location of the exterior wall. Clean the surface of the concrete on both sides of the waterstop steel plate 3 at the post-pouring strip location of the exterior wall, roughen and clean to expose the coarse aggregate of the concrete, and prevent inadequate treatment of the post-pouring strip joint later.

[0055] Step 5: Evenly lay rubber waterstop 14 in the bottom area of ​​the template unit;

[0056] Step 6: Install the outer template. Before installation, evenly apply flexible waterproof coating 8 to the grooves of the first oblique block 4, the second oblique block 5 and the third oblique block and the joint gap between the upper and lower layers. Install the Z-shaped clips 11 at the joint of the upper and lower template units. Install two fixing nails 10 on each side of the Z-shaped clips. Repeat this process until the template unit at the top plate is installed, and the installation of the outer template is completed.

[0057] Step 7: The topmost template unit uses steel bar clips 15 to hold the horizontal steel bar 2 of the outer wall, forming a fixed whole, and multiple vertical steel bars 1 of the outer wall are set vertically.

[0058] Step 8: Apply flexible waterproof coating 8 a second time at the joints of the first oblique block 4, the second oblique block 5, the third oblique block 6 and the Z-shaped and U-shaped clips, and apply waterproof sealant 12 from bottom to top at the inside corners of the outer walls on both sides of the first oblique block 4, the second oblique block 5, the third oblique block 6 and the post-pouring strip.

[0059] Step 9: According to the waterproof design requirements in the drawings, lay the waterproof layer and waterproof protective layer at the post-pouring strip. Before waterproofing construction, apply waterproof mortar to the inside and outside corners and joints for waterproofing reinforcement.

[0060] Step 10: After the construction of the basement waterproofing layer and waterproofing protective layer is completed, backfill the soil around the basement trench. During the operation, pay attention to the protection of the finished products and strictly prohibit mechanical equipment from bumping the waterproofing protective layer and the additional structure of the post-pouring strip.

[0061] Step 11: Earthwork backfilling should be carried out in layers and steps according to the specifications and plan requirements, with each layer being rolled and compacted, and the compaction degree not less than the design value;

[0062] Step 12: Before pouring concrete for the post-pouring strip, any water seepage caused by building settlement or other reasons can be sealed on the inside of the post-pouring strip to prevent outdoor water from entering the garage and ensure a dry indoor environment.

[0063] Step 13: After meeting the design requirements of the drawings, formwork is erected on the inner side of the post-cast strip of the exterior wall, water-stop bolts and tie bolts are fixed to the reinforcing steel bars 9, micro-expansion impermeable concrete is poured, and it is cured until the design strength is reached. The construction of the post-cast strip of the exterior wall is then completed.

[0064] This invention applies to the period between installation completion and the pouring of the post-cast strip concrete. By sequentially splicing grooved concrete oblique blocks from bottom to top, with a grooved base to hold the first-floor oblique block and inclined teeth on the top oblique block to engage the top slab reinforcement, it effectively protects the outer side of the post-cast strip of the exterior wall. This allows for earlier backfilling of the exterior wall area, reducing construction time. Simultaneously, the waterproof mortar, waterproof sealant, and expansion sealing strips on the outer side effectively prevent groundwater from entering the interior through the post-cast strip, providing excellent waterproofing. The construction materials used in this invention are common, the construction process is simple and convenient, and it allows for earlier backfilling, shortening the construction period and improving project economic efficiency. If seepage or leakage occurs between the three oblique blocks or between the oblique blocks and the exterior wall, it can be sealed from the inside of the basement. The construction is simple and convenient, provides good water-stopping effect, and does not affect external construction work.

[0065] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, and not to limit them. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of the present invention, and should all fall within the protection scope of the appended claims of the present invention.

Claims

1. An additional structure for waterproofing a post-cast strip of an exterior wall of a basement, characterized by, The outer formwork includes an outer formwork arranged at the post-pouring belt, the outer formwork includes a formwork unit and a L-shaped card (11), the formwork unit includes a first diagonal block (4), a second diagonal block (5) and a third diagonal block (6) connected side by side in sequence, the first diagonal block (4) and the second diagonal block (5) and the second diagonal block (5) and the third diagonal block (6) are connected through a sliding groove and sliding block mechanism in the vertical direction, a plurality of formwork units are arranged in alignment from top to bottom, the distance between the two vertical side walls of the L-shaped card (11) is consistent with the length of the formwork unit, the L-shaped card (11) is installed at the joint of the upper and lower adjacent two formwork units, and the formwork unit is fixed on the basement outer wall through the horizontal expansion sheet on the two sides.

2. The waterproofing additional structure for basement exterior wall post-cast strip according to claim 1, characterized in that, The sliding groove and sliding block mechanism includes a dovetail sliding groove and a dovetail sliding block.

3. The waterproofing additional structure for basement exterior wall post-cast strip according to claim 1, characterized in that, The connection between the first diagonal block (4) and the second diagonal block (5) and the connection between the second diagonal block (5) and the third diagonal block (6) are coated with flexible waterproof paint (8).

4. The waterproofing additional structure for basement exterior wall post-cast strip according to claim 1, characterized in that, The structure further includes a steel bar clamping block (15) arranged on one side of the uppermost formwork unit towards the basement outer wall, and the steel bar clamping block (15) is clamped on the outer wall horizontal steel bar (2) through the groove arranged thereon.

5. The waterproofing additional structure for basement exterior wall post-cast strip according to claim 1, characterized in that, The structure further includes a plurality of U-shaped cards (13), the U-shaped card (13) is upwardly fixed on the concrete cushion (16) at the post-pouring belt of the outer wall, and the bottom of the lowermost formwork unit is clamped in the U-shaped card (13).

6. The waterproofing additional structure for basement exterior wall post-cast strip according to claim 5, characterized in that, The bottom of the lowermost formwork unit is provided with a rubber waterstop (14).

7. The waterproofing additional structure for basement exterior wall post-cast strip according to claim 5, characterized in that, The joint between the first diagonal block (4), the second diagonal block (5) and the third diagonal block (6) and the L-shaped card (11) and the U-shaped card (13) is coated with flexible waterproof paint (8), and the inner corner position between the first diagonal block (4), the third diagonal block (6) and the outer wall on both sides of the post-pouring belt is coated with waterproof oil paste (12) from bottom to top.

8. The waterproofing additional structure for basement exterior wall post-cast strip according to claim 1, characterized in that, The first diagonal block (4), the second diagonal block (5) and the third diagonal block (6) are made of concrete pouring.

9. The waterproofing additional structure of basement exterior wall post-cast strip according to claim 8, characterized in that, A plurality of tension bolt fixing steel bars (9) are arranged in the second diagonal block (5) at intervals.

10. A construction method of the basement exterior wall post-cast strip waterproof additional structure according to any one of claims 1-9, characterized in that, The method comprises the following steps: S1, mark the installation position of the outer formwork at the position of the outer wall post-pouring belt, pre-bury the U-shaped card (13) in the concrete cushion (16) at the post-pouring belt of the outer wall, and make the U-shaped card (13) open upwardly and protrude out of the concrete cushion and be located at the installation position of the outer formwork; S2, clean the concrete surface dregs on both sides of the water stop steel plate (3) at the post-pouring belt position, chisel and wash the concrete coarse aggregate, and evenly lay the rubber waterstop (14) on the concrete cushion at the installation position of the outer formwork; S3, at the connection of the first oblique block (4) and the second oblique block (5), the connection of the second oblique block (5) and the third oblique block (6), brush flexible waterproof paint (8), the first oblique block (4), the second oblique block (5) and the third oblique block (6) are connected in turn to form a template unit, the lowermost one template unit is placed on the rubber waterstop (14) and is clamped in the U-shaped card (13), then the next template unit is stacked on the lowermost one template unit, the several card (11) is installed at the joint of the two template units, and the two template units are fixed on the basement outer wall through the lateral expansion sheets on both sides, and the operation is repeated until all the template units are installed.

Images