Post-cast strip structure for inner wall and outer wall of narrow fat groove
By constructing retaining walls and post-cast strips on the exterior walls to seal the roof slab within the narrow trench, combined with an internal waterproof layer and a double-layer waterproof structure, the problems of early backfilling of the narrow trench and basement roof slab and leakage of the post-cast strips on the exterior walls were solved, improving construction progress and waterproofing performance.
Patent Information
- Application Number
- CN202520030103.6
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-01-07
- Publication Date
- 2026-01-23
- Estimated Expiration
- 2035-01-07
AI Technical Summary
The construction of the post-pouring strip between the narrow trench and the basement exterior wall restricts the early backfilling of the narrow trench and the basement roof slab, and the post-pouring strip of the exterior wall poses a risk of leakage, affecting the construction progress and quality.
The narrow trench is enclosed by retaining walls, post-cast strips on the exterior walls, and pouring pipes. An internal waterproof layer and a double-layer waterproof structure are used to backfill the narrow trench and the basement roof in advance. Waterproofing is carried out before the post-cast strips on the exterior walls are poured to ensure the quality of subsequent pouring and waterproofing performance.
This method enables the backfilling of narrow trenches and basement roof slabs to be completed before the external wall post-pouring strip is poured, improving construction progress and waterproofing performance, avoiding potential leakage risks, and ensuring the compactness and quality of the external wall post-pouring strip.
Smart Images
Figure CN223824225U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The utility model relates to building construction technical field especially relates to a narrow fat groove inside and outside wall post-pouring belt structure. BACKGROUND
[0002] In the field of building construction, the backfilling of narrow fat groove and garage roof slab influences the further development of subsequent construction process, and the early completion of the backfilling of narrow fat groove and basement roof slab is beneficial to accelerating the overall construction progress. However, due to the existence of the post-pouring belt between the narrow fat groove and the basement outer wall, it needs to be poured in the later period, and due to the different width of the narrow fat groove and the inconsistent waterproof method, the construction of the post-pouring belt is often at the key node, which limits the early backfilling construction of the narrow fat groove and the basement roof slab and affects the construction progress.
[0003] In addition, if the backfilling of the narrow fat groove and the basement roof slab is carried out in advance, the construction difficulty of the post-pouring belt is large, and the construction quality cannot be guaranteed, and after the post-pouring belt is poured, the waterproof coiled material needs to be externally attached, if the construction of the waterproof coiled material is not in place, it is easy to cause subsequent leakage hidden danger, repair difficulty, and waste a lot of management energy and manpower and material resources.
[0004] Therefore, it is necessary to provide a narrow fat groove inside and outside wall post-pouring belt structure, which can solve the problems of the post-pouring belt limiting the early backfilling construction of the narrow fat groove and the basement roof slab and the leakage hidden danger of the post-pouring belt in the prior art. SUMMARY
[0005] The utility model aims at providing a narrow fat groove inside and outside wall post-pouring belt structure, which can solve the problems of the post-pouring belt limiting the early backfilling construction of the narrow fat groove and the basement roof slab and the leakage hidden danger of the post-pouring belt in the prior art.
[0006] The utility model is realized as follows:
[0007] A narrow fat groove inside and outside wall post-pouring belt structure, including retaining wall, outer wall post-pouring belt closed roof, pouring pipe, first backfill material and second backfill material, retaining wall is constructed in narrow fat groove, the inside of retaining wall and basement outer wall meet, the outside of retaining wall and underground continuous wall meet, retaining wall is provided along the edge of outer wall post-pouring belt, retaining wall and the basement outer wall are enclosed to form post-pouring belt construction area, outer wall post-pouring belt closed roof is constructed on retaining wall and basement roof slab and is fixedly connected with underground continuous wall, so that outer wall post-pouring belt closed roof closes the top of post-pouring belt construction area, pouring pipe is arranged on post-pouring belt closed roof and is communicated with post-pouring belt construction area, and the upper end of pouring pipe is connected to concrete pump pipe, first backfill material is backfilled in the narrow fat groove on both sides of retaining wall, and first backfill material is backfilled to the lower side of basement roof slab, and second backfill material is backfilled on post-pouring belt closed roof and basement roof slab.
[0008] The first backfill material is backfilled in the narrow and thick grooves on both sides of the retaining wall layer by layer, and each layer of the first backfill material is backfilled below the basement floor of the corresponding layer, and the force transmission plate belt is constructed on the top surface of each layer of the first backfill material.
[0009] The top surface of the force transmission plate belt is flush with the top surface of the basement floor of the corresponding layer.
[0010] The inner wall of the retaining wall is constructed with a waterproof mortar layer, the inner wall of the waterproof mortar layer is constructed with a first waterproof layer, and the first waterproof layer is vertically constructed above the basement top plate.
[0011] The top surface of the basement top plate and the top surface of the backfilled top plate of the outer wall are horizontally attached with a second waterproof layer, and the second waterproof layer is overlapped with the first waterproof layer.
[0012] The second waterproof layer is turned up at the junction with the pouring pipe and wrapped on the outer wall of the pouring pipe to form a third waterproof layer.
[0013] The first waterproof layer, the second waterproof layer and the third waterproof layer are all composed of two layers of waterproof rolls to form a double-layer waterproof structure.
[0014] Compared with the prior art, the utility model has the following beneficial effects:
[0015] 1、The utility model discloses a retaining wall, an outer wall back pouring belt closed top plate and a pouring pipe are set up, a relatively closed space is formed in the narrow and thick groove by the retaining wall and the outer wall back pouring belt closed top plate, that is, the back pouring belt construction area, can realize the backfill construction of the narrow and thick groove and the basement top plate in advance under the condition that the outer wall back pouring belt is not poured, and the subsequent concrete pouring in the back pouring belt construction area is carried out through the pouring pipe, the outer wall back pouring belt is formed, and the construction progress can be accelerated while ensuring the pouring compactness of the outer wall back pouring belt.
[0016] 2、The utility model discloses a first waterproof layer, a second waterproof layer and a third waterproof layer of double-layer structure, the first waterproof layer is attached to the inner wall of the retaining wall, the traditional external waterproof is changed into internal waterproof, the waterproof construction of the outer wall back pouring belt is carried out in advance, the construction quality of the outer wall back pouring belt can be improved, the waterproof performance of the whole outer wall back pouring belt structure is further improved through the overlapping of the second waterproof layer and the turning up and wrapping of the third waterproof layer to the pouring pipe, and the leakage hidden danger of the outer wall back pouring belt is effectively avoided. DRAWINGS
[0017] Figure 1 It is the sectional structure drawing of the outer wall back pouring belt structure in the narrow and thick groove of the utility model,
[0018] Figure 2 It is Figure 1 the sectional view of A-A in the utility model,
[0019] Figure 3 This is a top view from direction B of the structure of the post-cast strip on the inner and outer walls of the narrow trough of this utility model.
[0020] In the diagram, 1 is the diaphragm wall, 2 is the retaining wall, 3 is the force transmission strip, 4 is the external wall post-pouring strip sealing the top slab, 41 is the construction area of the post-pouring strip, 51 is the first waterproof layer, 52 is the second waterproof layer, 53 is the third waterproof layer, 6 is the pouring pipe, 7 is the first backfill material, 8 is the second backfill material, 9 is the basement exterior wall, 10 is the basement floor slab, and 11 is the basement roof slab. Detailed Implementation
[0021] The present invention will be further described below with reference to the accompanying drawings and specific embodiments.
[0022] Please see the appendix Figure 1 To be continued Figure 3 A post-cast strip structure for the inner and outer walls of a narrow trench includes a retaining wall 2, a closed top slab 4 for the post-cast strip, a casting pipe 6, a first backfill material 7, and a second backfill material 8. The retaining wall 2 is constructed within the narrow trench, with its inner side connected to the outer wall 9 of the basement and its outer side connected to the underground continuous wall 1. The retaining wall 2 is set along the edge of the post-cast strip, enclosing the construction area 41 of the post-cast strip between the retaining wall 2 and the outer wall 9 of the basement. The closed top slab 4 for the post-cast strip is constructed on the retaining wall 2 and the basement top slab 11. It is fixedly connected to the underground continuous wall 1, so that the top plate 4 of the post-pouring strip seals the top of the post-pouring strip construction area 41. The pouring pipe 6 is installed through the top plate 4 of the post-pouring strip seals. The lower end of the pouring pipe 6 is connected to the construction area 41 of the post-pouring strip, and the upper end of the pouring pipe 6 is connected to the concrete pump pipe. The first backfill material 7 is backfilled in the narrow trenches on both sides of the retaining wall 2. The first backfill material 7 is backfilled upward to the bottom of the basement top plate 11. The second backfill material 8 is backfilled on the top plate 4 of the post-pouring strip seals and the basement top plate 11.
[0023] The space between the diaphragm wall 1 and the basement exterior wall 9 is a narrow trench. Within this narrow trench, a closed space, namely the post-cast strip construction area 41, is constructed using retaining walls 2. The sides of the post-cast strip construction area 41 are formed by retaining walls 2 made of solid concrete bricks, and the top is a reinforced concrete structural slab-made exterior wall post-cast strip sealing slab 4, which encloses the post-cast strip construction area 41, allowing for the early backfilling of the narrow trench using the first backfill material 7 and the second backfill material 8.
[0024] Meanwhile, the pre-reserved pouring pipe 6 on the top slab 4 of the external wall post-pouring strip facilitates the subsequent concrete pouring construction of the external wall post-pouring strip, so that the early backfilling operation does not affect the subsequent pouring construction of the external wall post-pouring strip. This enables the early backfilling construction of the narrow trench and the basement top slab without pouring the external wall post-pouring strip, which can speed up the construction progress while ensuring the quality of the external wall post-pouring strip concrete pouring.
[0025] Please see the appendix Figure 1 The first backfill material 7 is backfilled layer by layer into the narrow trenches on both sides of the retaining wall 2. Each layer of the first backfill material 7 is backfilled to the bottom of the corresponding basement floor slab 10, and a force transmission plate 3 is constructed on the top surface of each layer of the first backfill material 7.
[0026] Preferably, the first backfill material 7 can be A05 foamed concrete, and the force transmission plate 3 can be cast with plain concrete to ensure that the backfill is dense and the backfill strength meets the construction requirements.
[0027] Please see the appendix Figure 1 The top surface of the force transmission plate 3 is flush with the top surface of the basement floor slab 10 of the corresponding floor.
[0028] The backfill thickness of the first backfill material 7 and the force transmission plate 3 is consistent with the height of the corresponding floor, thereby ensuring that the backfill strength in the narrow trench outside each floor of the basement structure is consistent.
[0029] Please see the appendix Figure 1 A waterproof mortar layer (not shown in the figure) is constructed on the inner wall of the retaining wall 2, and a first waterproof layer 51 is constructed on the inner wall of the waterproof mortar layer. The first waterproof layer 51 is constructed vertically to the top of the basement roof slab 11.
[0030] The construction of the waterproof mortar layer serves to level the surface and create a waterproof base layer, facilitating the application of the first waterproof layer 51. By constructing the first waterproof layer 51 before the external wall pouring strip, the traditional external waterproofing (waterproof membrane wrapped around the pre-constructed external wall pouring strip) is changed to internal waterproofing (the first waterproof layer 51 is internally attached to the inner wall of the retaining wall 2). This advance waterproofing of the external wall pouring strip improves its waterproofing performance, thereby addressing the challenges of waterproofing at the external wall pouring strip and the potential for leakage.
[0031] Please see the appendix Figure 1 A second waterproof layer 52 is horizontally laid on the top surface of the basement roof slab 11 and the top surface of the roof slab 4 sealed by the post-cast strip of the exterior wall, and the second waterproof layer 52 overlaps with the first waterproof layer 51.
[0032] The second waterproof layer 52 serves as a waterproof structure on the basement roof slab 11. It is constructed using conventional techniques, with the second waterproof layer 52 overlapping the first waterproof layer 51 to ensure the overall waterproof performance of the basement exterior wall 9 and the post-cast strip.
[0033] Please see the appendix Figure 1 The second waterproof layer 52 is turned up at the junction with the casting pipe 6 and wrapped around the outer wall of the casting pipe 6 to form the third waterproof layer 53.
[0034] The gap between the pouring pipe 6 and the sealed top slab 4 of the external wall post-pouring strip is sealed by the third waterproof layer 53 to ensure waterproof performance.
[0035] The first waterproof layer 51, the second waterproof layer 52, and the third waterproof layer 53 are all composed of two layers of waterproof membrane, forming a double-layer waterproof structure, which further improves the overall waterproof performance and avoids the risk of leakage in the post-pouring strip of the exterior wall.
[0036] Please see the appendix Figure 1 To be continued Figure 3 The construction process of this utility model is as follows:
[0037] A retaining wall 2 is constructed within a narrow trench between a 1m thick diaphragm wall 1 and the basement exterior wall 9. The retaining wall 2 is formed using solid concrete bricks measuring 195*95*50mm. The retaining wall 2 is C-shaped and constructed along the edge of the post-cast strip of the exterior wall, thus creating a post-cast strip construction area 41 between the retaining wall 2 and the basement exterior wall 9. This post-cast strip construction area 41 is used for subsequent concrete pouring to form the post-cast strip of the exterior wall. The retaining wall 2 is constructed up to the top surface elevation of the basement roof slab 11.
[0038] After the retaining wall 2 is constructed, the inner wall of the retaining wall 2 (with the wall surface within the post-pouring strip construction area 41 as the inner wall and the wall surface within the narrow trench as the outer wall) is smoothed with plaster mortar to form a 10mm thick waterproof mortar layer, meeting the requirements for the SBS waterproof membrane substrate. Then, SBS modified bitumen waterproof membrane of polyester type II is vertically laid on the inner wall of the waterproof mortar layer to form the first waterproof layer 51.
[0039] The first waterproof layer 51 is 600mm higher than the finished surface of the basement roof slab 11. The first waterproof layer 51 consists of two layers of SBS modified bitumen waterproof membrane. The thickness of the first layer of SBS modified bitumen waterproof membrane is 3mm, and the thickness of the second layer of SBS modified bitumen waterproof membrane is 4mm.
[0040] A structural slab with a length of 2400mm, a width of 1600mm, a thickness of 300mm, a concrete grade of C40, and internal reinforcement of double-layer, bidirectional φ18@200mm is used as the closed top slab 4 for the post-cast strip of the exterior wall. This closed top slab 4 completely covers the retaining wall 2 at the top of the post-cast strip construction area 41 and is anchored to the underground continuous wall 1 via rebar anchoring. The closed top slab 4 can meet the backfill load requirements of the second backfill material 8.
[0041] A through hole is pre-reserved in the middle of the top slab 4 of the external wall post-cast strip for installing the pouring pipe 6. This facilitates subsequent concrete pouring of the post-cast strip construction area 41 through the pouring pipe 6, ensuring the compactness of the concrete and forming the external wall post-cast strip. The pouring pipe 6 can be a galvanized steel pipe with a diameter of 200mm. The upper end of the pouring pipe 6 is 3m above the surface of the top slab 4 of the external wall post-cast strip to prevent foreign objects from falling into the construction area 41 of the post-cast strip after the construction of the basement roof slab 11.
[0042] The first waterproof layer 51 changes the traditional construction method of first pouring the outer wall, then pouring the strip, and then wrapping the waterproof membrane to first sealing the waterproof layer and then pouring the outer wall strip, which can reduce the risk of leakage of the outer wall strip.
[0043] A second waterproof layer 52 is formed by laying a polyester-based Type II SBS modified bitumen waterproof membrane on the top surface of the basement roof slab 11 and the top surface of the sealed roof slab 4 of the exterior wall post-cast strip. The second waterproof layer 52 overlaps with the first waterproof layer 51 to ensure a closed loop of vertical and horizontal waterproofing. The overlap width is not less than 100mm, and the height of the rolled-up portion is not less than 250mm. The material and laying process of the second waterproof layer 52 are the same as those of the first waterproof layer 51, only the laying direction and laying position are different, which will not be described in detail here.
[0044] After sealing the construction area 41 of the post-cast strip on the top slab 4 of the external wall, the narrow trench and the basement top slab 11 can be backfilled in advance. Specifically, foamed concrete with a strength grade of A05 is used as the first backfill material 7 to ensure that the backfill in the narrow trench is dense and meets the strength requirements. The first backfill material 7 is backfilled to 200mm below the top surface elevation of the first basement floor slab 10. A 200mm thick layer of C20 plain concrete is poured on the first backfill material 7 to form a force transmission strip 3, so that the top surface of the force transmission strip 3 is flush with the top surface of the first basement floor slab 10. The backfilling operation of the first layer is repeated until the top surface of the force transmission strip 3 of the last layer is flush with the top surface of the basement top slab 11. Backfill material is used as the second backfill material 8 on the top layer of the force transmission plate strip 3, the basement roof slab 11 and the closed roof slab 4 of the external wall post-pouring strip, so as to complete the early backfilling construction of the narrow trench and the basement roof slab 11 without pouring the external wall post-pouring strip.
[0045] When pouring concrete for the post-cast strip of the exterior wall, the concrete pump pipe is connected to the pouring pipe 6, and the concrete slurry is poured into the construction area 41 of the post-cast strip through the pouring pipe 6, so that the concrete is poured densely in the construction area 41 of the post-cast strip to form the post-cast strip of the exterior wall, and the first waterproof layer 51 is wrapped around the post-cast strip of the exterior wall.
[0046] The above are merely preferred embodiments of the present utility model and are not intended to limit the scope of protection of the present utility model. Therefore, any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the scope of protection of the present utility model.
Claims
1. A post-cast strip structure for the inner and outer walls of a narrow, sloping trench, characterized in that: The structure includes a retaining wall (2), a closed top slab (4) for the post-cast strip of the outer wall, a pouring pipe (6), a first backfill material (7), and a second backfill material (8); the retaining wall (2) is constructed in a narrow trench, with its inner side connected to the outer wall of the basement (9) and its outer side connected to the underground continuous wall (1); the retaining wall (2) is set along the edge of the post-cast strip of the outer wall, so that the retaining wall (2) and the outer wall of the basement (9) enclose the construction area (41) of the post-cast strip; the closed top slab (4) for the post-cast strip of the outer wall is constructed on the retaining wall (2) and the top slab (11) of the basement and is connected to the underground continuous wall. The wall (1) is fixedly connected so that the top plate (4) of the post-cast strip of the outer wall closes the top of the construction area (41) of the post-cast strip. The pouring pipe (6) is installed through the top plate (4) of the post-cast strip. The lower end of the pouring pipe (6) is connected to the construction area (41) of the post-cast strip. The upper end of the pouring pipe (6) is connected to the concrete pump pipe. The first backfill material (7) is backfilled in the narrow trench on both sides of the retaining wall (2). The first backfill material (7) is backfilled upward to the bottom of the basement top plate (11). The second backfill material (8) is backfilled on the top plate (4) of the post-cast strip and the basement top plate (11).
2. The post-cast strip structure for the inner and outer walls of the narrow trench as described in claim 1, characterized in that: The first backfill material (7) is backfilled layer by layer in the narrow trenches on both sides of the retaining wall (2). Each layer of the first backfill material (7) is backfilled to the bottom of the corresponding basement floor slab (10), and a force transmission strip (3) is constructed on the top surface of each layer of the first backfill material (7).
3. The post-cast strip structure for the inner and outer walls of the narrow trench as described in claim 2, characterized in that: The top surface of the force transmission plate (3) is flush with the top surface of the basement floor slab (10) of the corresponding floor.
4. The post-cast strip structure for the inner and outer walls of the narrow trench according to claim 1 or 2, characterized in that: A waterproof mortar layer is constructed on the inner wall of the retaining wall (2), and a first waterproof layer (51) is constructed on the inner wall of the waterproof mortar layer. The first waterproof layer (51) is constructed vertically to the top of the basement roof slab (11).
5. The post-cast strip structure for the inner and outer walls of the narrow trench as described in claim 4, characterized in that: A second waterproof layer (52) is horizontally laid on the top surface of the basement roof slab (11) and the top surface of the roof slab (4) of the external wall post-cast strip, and the second waterproof layer (52) overlaps with the first waterproof layer (51).
6. The post-cast strip structure for the inner and outer walls of the narrow trench as described in claim 5, characterized in that: The second waterproof layer (52) is turned up at the junction with the casting pipe (6) and wrapped around the outer wall of the casting pipe (6) to form a third waterproof layer (53).
7. The post-cast strip structure for the inner and outer walls of the narrow trench as described in claim 6, characterized in that: The first waterproof layer (51), the second waterproof layer (52), and the third waterproof layer (53) are all composed of two layers of waterproof membrane, forming a double-layer waterproof structure.