Arched waterproof structure of exterior wall post-cast strip and reverse waterproof construction method at post-cast strip

Abstract

The present invention discloses an arched waterproof structure of an external wall post-cast strip and a reverse waterproof construction method at the post-cast strip. The arched waterproof structure of the external wall post-cast strip includes an external retaining wall and backfill earthwork, the external retaining wall is provided with a post-cast strip, the backfill earthwork is provided with an arched brick wall, a waterproof component is provided between the external retaining wall and the backfill earthwork, and the waterproof component reserves a waterproof joint to be overlapped in the arched brick wall. The reverse waterproof construction method at the post-cast strip includes the arched waterproof structure of the external wall post-cast strip, and also includes the following steps: popping out a waterproof joint and building an arched brick wall; explaining the waterproof engineering of the external retaining wall before construction; reserving a waterproof joint; controlling the quality and correcting the deviation when building the arched brick wall; constructing an additional waterproof layer on both sides of the post-cast strip; backfilling the earthwork on the outside of the external retaining wall to form a backfill earthwork area; pouring the post-cast strip after the main body is capped and the settlement value is stabilized; overlapping and sealing the reserved waterproof joint. The arched waterproof structure of the exterior wall post-cast strip and the reverse waterproofing construction method at the post-cast strip have the beneficial effects of good construction quality and good safety and stability of the wall.

Description

Technical Field

[0001] The invention relates to the technical field of building construction, and in particular to an arched waterproof structure of an external wall post-cast strip and a reverse waterproof construction method at the post-cast strip. Background Art

[0002] Retaining wall refers to a structure that supports the roadbed fill or hillside soil and prevents the fill or soil from deforming and becoming unstable. In the cross section of the retaining wall, the part that is in direct contact with the supported soil is called the wall back, and the part opposite to the wall back and facing the air is called the wall surface. In order to prevent the basement retaining wall from generating harmful cracks due to changes in ambient temperature, uneven shrinkage or uneven settlement, post-cast strips need to be left at appropriate locations on the retaining wall.

[0003] According to the existing post-casting strip construction plan, the post-casting strip closure construction period is long and there are many safety and quality risks. Generally, the construction site is narrow and there are many interspersed processes. During the project promotion process, especially in the early stage of construction, commercial concrete tank trucks, heavy trucks, various types of construction cranes and other construction machinery have high requirements for the site force. In addition, during the rainy season construction, the precipitation is large. Generally, most of the foundation is silty clay that softens when it encounters water, and the foundation slope is prone to danger.

[0004] Therefore, a technology is needed to ensure the quality of the waterproofing project of the external retaining wall before backfilling and to avoid damage to the waterproof layer due to uneven settlement in the later stage. Summary of the invention

[0005] The technical problem to be solved by the present invention is that the existing post-cast strip construction time is long and the safety hazard is relatively large. The purpose is to provide an arched waterproof structure of an exterior wall post-cast strip and a reverse waterproof construction method at the post-cast strip. The corresponding technical means are adopted and are suitable for waterproof construction treatment before backfilling of earth at the junction of all basement outer retaining walls and post-cast strips, and the beneficial effects of good construction quality and good safety and stability of the wall are achieved.

[0006] The present invention is achieved through the following technical solutions:

[0007] In the first aspect, the present invention provides an arched waterproof structure with a post-cast strip on an exterior wall, which includes an exterior retaining wall and backfill earth, wherein the exterior retaining wall is provided with a post-cast strip, and the backfill earth is provided with an arched brick wall, wherein the outer arch surface of the arched brick wall is connected to the backfill earth, and the opening of the arched brick wall is aligned and matched with the post-cast strip, and a waterproof component is provided between the exterior retaining wall and the backfill earth, wherein the waterproof component reserves a waterproof joint to be overlapped in the arched brick wall.

[0008] Furthermore, in the present invention, the arched brick wall is provided with a ladder made of waste reinforcement.

[0009] Furthermore, in the present invention, an additional waterproof layer is provided on the side of the post-cast strip and the outer retaining wall, and the additional waterproof layer is located on the side close to the arched brick wall.

[0010] Furthermore, in the present invention, water-stop steel plates are provided inside the above-mentioned post-cast strip and the outer retaining wall, and the water-stop steel plates are installed toward the water-facing surface.

[0011] In a second aspect, the present invention further provides a reverse construction method for waterproofing at a post-cast strip, which includes an arched waterproof structure of a post-cast strip of an exterior wall, and further includes the following steps:

[0012] Pop out waterproof joints and build arched brick walls to form arc construction control lines;

[0013] Briefing on the waterproofing of the external retaining wall before construction;

[0014] Reserve waterproof joints according to the specified size at the post-cast strip;

[0015] Before laying the arched brick wall, the bricklaying construction should be explained, and the quality should be controlled and corrected when laying the arched brick wall;

[0016] Construct additional waterproof layers on both sides of the post-cast strip and conduct hidden inspection of the additional waterproof layers;

[0017] Backfill the earthwork outside the outer retaining wall to form a backfill area. During the backfill process, the tamping stratification and density are controlled.

[0018] After the main body is capped and the settlement value is stabilized, pour the post-casting strip;

[0019] Overlap and seal the reserved waterproof joints.

[0020] Furthermore, in the present invention, the arched brick wall is built before backfilling the earth at the junction of the outer retaining wall and the post-cast strip of the above-mentioned basement, and the waterproof joint is reserved in the arched brick wall. After the main body is capped and the settlement plate is stable, an additional waterproof layer is constructed, and finally the waterproof joint is overlapped.

[0021] Furthermore, in the present invention, the overlap length of the waterproof joint is at least reserved for 200 mm.

[0022] Furthermore, in the present invention, the arched brick wall is built with solid shale bricks.

[0023] Furthermore, in the present invention, the mortar joint of the above-mentioned arched brick wall is no larger than 10 mm.

[0024] Furthermore, in the present invention, the additional waterproof layer is the same in length on each side of the outer retaining wall and the post-cast strip.

[0025] Compared with the prior art, the present invention has the following advantages and beneficial effects:

[0026] 1. The arched brick walls are built with shale solid bricks on both sides of the post-cast belt, which improves the compressive performance. The arched waterproof structure of the post-cast belt of the exterior wall is more stable and of better quality;

[0027] 2. Reserve waterproof joints in the arched brick wall, and construct the waterproof joints after the main body is capped and poured to form a closed waterproof system;

[0028] 3. The arched brick wall makes full use of the compressive properties of brick materials, which can effectively resist the lateral soil pressure caused by mechanical tamping during the backfilling process, and is safer. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] In order to more clearly illustrate the technical solutions of the exemplary embodiments of the present invention, the following briefly introduces the drawings required for use in the embodiments. It should be understood that the following drawings only illustrate certain embodiments of the present invention and should not be regarded as limiting the scope. For those of ordinary skill in the art, other relevant drawings can be obtained based on these drawings without creative work. In the drawings:

[0030] Figure 1 It is a schematic diagram of the arched waterproof structure of the exterior wall post-cast strip according to an embodiment of the present invention.

[0031] Markings and corresponding parts names in the attached drawings: 1-external retaining wall, 2-backfill earth, 3-post-cast strip, 4-arched brick wall, 401-ladder, 5-waterproof parts, 501-waterproof joints, 6-additional waterproof layer, 7-waterstop steel plate. DETAILED DESCRIPTION

[0032] In order to make the purpose, technical scheme and advantages of the present invention clearer, the present invention is further described in detail below in conjunction with the embodiments and drawings. The schematic implementation mode of the present invention and its description are only used to explain the present invention and are not intended to limit the present invention. The following detailed description of the embodiments of the present invention provided in the drawings is not intended to limit the scope of the claimed invention, but merely represents selected embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in the field without creative work are within the scope of protection of the present invention.

[0033] It should be noted that similar numbers and letters represent similar items in the following figures. Therefore, once an item is defined in one figure, it does not need to be further defined and explained in subsequent figures. In the description of the embodiments of the present invention, it should also be noted that unless otherwise clearly specified and limited, the terms "setting", "installation" and "connection" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, and it can be the internal connection of two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to the specific circumstances.

[0034] Example 1

[0035] Combination Figure 1 As shown, embodiment 1 of the present invention takes into comprehensive consideration multiple aspects such as stress, anti-seepage effect, construction efficiency and construction cost, and proposes an arched waterproof structure of an exterior wall post-cast strip, and the specific structure is described as follows.

[0036] The arched waterproof structure of the external wall post-cast strip of the present embodiment 1 mainly includes four parts: the external retaining wall 1, the backfill earthwork 2, the post-cast strip 3 and the arched brick wall 4. The external retaining wall 1 is a reinforced concrete wall, which has the advantages of mature technology, stable and reliable use, such as Figure 1 As shown, a post-cast strip 3 is provided in the middle portion of the outer retaining wall 1 .

[0037] Further, combined with Figure 1 As shown, an arched brick wall 4 is arranged at the lower side of the post-cast strip 3, and both ends of the arched brick wall 4 are connected to the bottom surface of the outer retaining wall 1, and the U-shaped openings of the post-cast strip 3 and the arched brick wall 4 are aligned. The outer arch surface of the arched brick wall 4 and the outer side surfaces of the remaining outer retaining walls 1 are both provided with backfill earth 2, and the arched brick wall 4 can resist the lateral earth pressure of the backfill earth 2.

[0038] In some implementations of this embodiment, Figure 1 As shown, a waterproof member 5 is provided between the outer retaining wall 1 and the backfill earthwork 2. The waterproof member 5 is made of a large-surface waterproof roll material, which has the advantages of low cost and good waterproofing. The waterproof member 5 is disconnected in the arched brick wall 4, leaving a waterproof joint 501 that can be overlapped later.

[0039] Further, such as Figure 1As shown, both sides of the post-cast strip 3 are external retaining walls 1, so in order to enhance the waterproof performance, water-stop steel plates 7 are installed on both sides of the post-cast strip 3, half of the water-stop steel plates 7 are located in the external retaining wall 1, and the other half are located in the post-cast strip 3. The water-stop steel plates 7 are installed facing the water surface, which has a good waterproof effect. In addition, an additional waterproof layer 6 is installed on the outer side of the post-cast strip 3 and the external retaining wall 1, and the additional waterproof layer 6 is located at the opening position of the arched brick wall 4. The additional waterproof layer 6 covers the connection gap between the post-cast strip 3 and the external retaining wall 1, further improving the waterproof effect.

[0040] In some implementations of this embodiment, Figure 1 As shown, waste steel bars are used to make a U shape, and then the U-shaped waste steel bars are evenly installed from top to bottom inside the arched brick wall 4 to form a ladder 401. It is convenient for construction workers to enter the arched brick wall 4 or climb out of the arched brick wall 4, and the construction is more convenient.

[0041] Example 2

[0042] This embodiment provides a reverse construction method for waterproofing the post-cast joint, which adopts the arched waterproof structure of the post-cast joint of the exterior wall in Embodiment 1.

[0043] The general method is as follows: pop up the waterproof joint 501, build the arched brick wall 4 to form an arc construction control line; give instructions before the waterproofing construction of the outer retaining wall 1; reserve waterproof joints 501 at the post-cast strip 3 according to the specified size; give instructions before building the arched brick wall 4, control the quality when building the arched brick wall 4, and correct the deviation; construct an additional waterproof layer 6 on both sides of the post-cast strip 3; conduct a hidden acceptance of the waterproof construction and the additional waterproof layer 6 at the post-cast strip 3 before backfilling; backfill the outer side of the outer retaining wall 1 to form a backfill earthwork 2 area, and control the quality of the tamping stratification and density during the backfilling process; cast the post-cast strip 3 after the main body is capped and the settlement value is stabilized; overlap and seal the reserved waterproof joints 501.

[0044] The reverse construction method of waterproofing at the post-casting strip adopts the reverse construction method. Before the arched brick wall 4 in the post-casting strip 3 area is built, the waterproof construction unit is first given a construction explanation, emphasizing that waterproof joints 501 are reserved at 330mm on both sides of the post-casting strip 3, and the overlap of waterproof joints 501 is reserved by no less than 200mm. The arched brick wall 4 should be built from 330mm on both sides of the post-casting strip 3, that is, the opening width of the arched brick wall 4 is 800+330+330=1460mm. When building the arched brick wall 4, the quality is controlled and the deviation is corrected to ensure that the verticality and curvature of the arched brick wall 4 meet the requirements.

[0045] The waterproof part 5 uses a 1.5mm thick polymer modified asphalt waterproofing membrane, and the waterproof joint 501 of the waterproofing membrane is 80-100mm long. Considering that the post-casting strip 3 area is a weak link in waterproofing, the reliability of the subsequent waterproof joint 501 is ensured, and the waterproof overlap length is required to be at least 200mm. The post-casting strip 3 and the 330mm width on both sides of the post-casting strip 3 are reserved for the empty laying of the waterproof part 5 membrane. After the subsequent main structure is completed and the settlement value is stabilized, the post-casting strip 3 concrete is poured and the waterproofing of this area is constructed.

[0046] The average earth backfill height of the basement outer retaining wall 1 is 5.4m. Since the earth backfill height of the outer retaining wall 1 is relatively large, the quality requirements of the arched brick wall 4 are relatively high. Therefore, the arched brick wall 4 is built with shale solid bricks, the thickness of the arched brick wall 4 is 240mm, and the wall mortar joint of the arched brick wall 4 needs to be controlled within 10mm. The structure of the arched brick wall 4 fully utilizes the "compression resistance" performance of bricks and has good force bearing capacity.

[0047] After the main body pouring is completed and the settlement value is stabilized, clean the post-casting strip 3 before pouring it, and use higher-grade P8 concrete with expansion fibers to pour it according to the concrete construction plan. During the process, maintenance should be carried out according to the requirements of the plan, and the curing time shall not be less than 14 days.

[0048] Before the reserved waterproof joint 501 roll is constructed, the waterproof additional layer 6 is installed on both sides of the post-cast strip 3. The waterproof additional layer 6 uses waterproof roll material. The waterproof additional layer 6 is 500mm wide and extends 250mm on each side of the outer retaining wall 1 and the post-cast strip 3.

[0049] After the construction of the additional waterproof layer 6 is completed and self-inspected, the large surface waterproof membrane (waterproof joint 501) reserved for the outermost layer shall be reported to the supervisor for hidden acceptance of the additional waterproof layer 6. After the acceptance is qualified, the outermost reserved waterproof joint 501 shall be closed, and the overlap length of the waterproof joint 501 at this location shall be at least 200mm.

[0050] In summary, the arched waterproof structure of the post-cast strip of the exterior wall provided by the present invention comprises an exterior retaining wall 1 and backfill earthwork 2, wherein the exterior retaining wall 1 is provided with a post-cast strip 3, and the backfill earthwork 2 is provided with an arched brick wall 4, wherein the outer arch surface of the arched brick wall 4 is connected to the backfill earthwork 2, and the opening of the arched brick wall 4 is aligned and adapted with the post-cast strip 3, and a waterproof member 5 is provided between the exterior retaining wall 1 and the backfill earthwork 2, wherein the waterproof member 5 has a waterproof joint 501 to be overlapped in the arched brick wall 4. The arched brick wall 4 is provided with a ladder 401 made of waste reinforcement. An additional waterproof layer 6 is provided on the side of the post-cast strip 3 and the exterior retaining wall 1, and the additional waterproof layer 6 is located on the side close to the arched brick wall 4. A water-stop steel plate 7 is provided inside the post-cast strip 3 and the exterior retaining wall 1. The present invention also provides a reverse waterproof construction method at the post-cast joint, which includes an arched waterproof structure of the post-cast joint of the exterior wall, and also includes the following steps: popping out a waterproof joint 501, laying an arched brick wall 4 to form an arc construction control line; briefing before the waterproofing project of the exterior retaining wall 1 is constructed; reserving a waterproof joint 501 at the post-cast joint 3 according to the specified size; conducting a bricklaying construction briefing before laying the arched brick wall 4, controlling the quality when laying the arched brick wall 4, and correcting the deviation; conducting a hidden acceptance of the waterproof construction and the post-placed waterproof membrane at the post-cast joint 3 before backfilling; backfilling the outer side of the exterior retaining wall 1 to form a backfill earthwork 2 area, and controlling the quality of the tamping stratification and density during the backfilling process; pouring the post-cast joint 3 after the main body is capped and the settlement value is stabilized; constructing an additional waterproof layer 6 on both sides of the post-cast joint 3; and overlapping and sealing the reserved waterproof joint 501. Before backfilling the earthwork at the junction of the outer retaining wall 1 and the post-cast strip 3 of the basement, an arched brick wall 4 is built, and a waterproof joint 501 is reserved in the arched brick wall 4. After the main body capping and settlement plate is stable, the additional waterproof layer 6 is constructed, and finally the waterproof joint 501 is overlapped. At least 200mm is reserved for the waterproof joint 501. The arched brick wall 4 is built with shale solid bricks. The wall mortar joint of the arched brick wall 4 is not greater than 10mm. The additional waterproof layer 6 is the same length as each side of the outer retaining wall 1 and the post-cast strip 3.

[0051] Therefore, in the present invention, the arched waterproof structure of the exterior wall post-casting strip and the reverse waterproof construction method at the post-casting strip, shale solid bricks are used to build the arched brick wall 4 on both sides of the post-casting strip 3, which improves the compressive resistance. The arched waterproof structure of the exterior wall post-casting strip is more stable as a whole and has better quality; a waterproof joint 501 is reserved in the arched brick wall 4, and the waterproof joint 501 is constructed after the main body is capped and the post-casting strip 3 is cast, forming a closed waterproof system; the arched brick wall 4 makes full use of the compressive resistance of the brick material, can well resist the side soil pressure of mechanical tamping during backfilling, and has better safety.

[0052] The specific implementation methods described above further illustrate the objectives, technical solutions and beneficial effects of the present invention in detail. It should be understood that the above description is only a specific implementation method of the present invention and is not intended to limit the scope of protection of the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. An arched waterproof structure of an exterior wall post-cast strip, characterized in that: The invention comprises an outer retaining wall (1) and a backfill (2), wherein the outer retaining wall (1) is provided with a post-cast strip (3), the backfill (2) is provided with an arched brick wall (4), the outer arch surface of the arched brick wall (4) is connected to the backfill (2), the opening of the arched brick wall (4) is aligned and matched with the post-cast strip (3), a waterproof member (5) is provided between the outer retaining wall (1) and the backfill (2), and the waterproof member (5) reserves a waterproof joint (501) to be overlapped in the arched brick wall (4).

2. The arched waterproof structure of the exterior wall post-cast strip according to claim 1 is characterized in that: The arched brick wall (4) is provided with a ladder (401) made of waste reinforcement.

3. The arched waterproof structure of the exterior wall post-cast strip according to claim 1 is characterized in that: The side surfaces of the post-cast strip (3) and the outer retaining wall (1) are provided with an additional waterproof layer (6), and the additional waterproof layer (6) is located on a side close to the arched brick wall (4).

4. The arched waterproof structure of the exterior wall post-cast strip according to claim 3 is characterized in that: Waterstop steel plates (7) are provided inside the post-cast strip (3) and the outer retaining wall (1), and the waterstop steel plates (7) are installed toward the water-facing surface.

5. A waterproof reverse construction method for post-casting strips, characterized in that: The method comprises the arched waterproof structure of the exterior wall post-cast strip as claimed in any one of claims 1 to 4, and further comprises the following steps: Pop out the waterproof joint (501), build an arched brick wall (4) to form an arc construction control line; Briefing on the waterproofing of the external retaining wall (1) before construction; A waterproof joint (501) is reserved at the post-casting strip (3) according to the specified size; Before laying the arched brick wall (4), the bricklaying construction is explained, and the quality is controlled and the deviation is corrected when laying the arched brick wall (4); An additional waterproof layer (6) is constructed on both sides of the post-cast strip (3), and a concealed inspection is performed on the additional waterproof layer (6); Backfilling the outer side of the outer retaining wall (1) to form a backfill area (2), and during the backfilling process, the tamping stratification and density are controlled. After the main body is capped and the settlement value is stabilized, the post-casting strip (3) is cast; The reserved waterproof joint (501) is overlapped and sealed.

6. The waterproof reverse construction method at the post-cast zone according to claim 5 is characterized in that: The arched brick wall (4) is built before backfilling the earthwork at the junction of the outer retaining wall (1) and the post-cast strip (3) of the basement, and the waterproof joint (501) is reserved in the arched brick wall (4). After the main body capping and settlement plate are stabilized, the additional waterproof layer (6) is constructed, and finally the waterproof joint (501) is overlapped.

7. The waterproof reverse construction method at the post-cast zone according to claim 6 is characterized in that: The overlapping length of the waterproof joint (501) is at least reserved for 200 mm.

8. The waterproof reverse construction method at the post-cast zone according to claim 5 is characterized in that: The arched brick wall (4) is built with solid shale bricks.

9. The waterproof reverse construction method at the post-cast zone according to claim 8 is characterized in that: The wall mortar joint of the arched brick wall (4) is no larger than 10 mm.

10. The waterproof reverse construction method at the post-cast zone according to claim 5, characterized in that: The additional waterproof layer (6) has the same length on each side of the outer retaining wall (1) and the post-cast strip (3).

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