Flexible waterproof sealing structure for underground directly buried cable or optical cable wall penetration and construction method

Abstract

The application provides a flexible sealing structure for underground directly buried cable or optical cable wall penetration and a construction method. The structure comprises a wall penetration protection pipe and a flexible sealing assembly arranged between the wall penetration protection pipe and the cable or optical cable. The flexible sealing assembly is arranged at least on the water side of the wall penetration protection pipe and comprises a long pipe clamp, a flexible sealing element arranged in the long pipe clamp and an end locking gland arranged at the end of the long pipe clamp. A threaded adjusting stop ring is arranged in the long pipe clamp, and the flexible sealing element is arranged between the threaded adjusting stop ring and the end locking gland. The flexible sealing element forms a static seal with the sealing surface of the wall penetration protection pipe and the cable or optical cable. The flexible sealing assembly with a pre-pressing and pre-tightening adjusting mechanism is arranged between the cable or optical cable and the wall penetration protection pipe, realizes the functions of radial bidirectional positioning and axial side bidirectional positioning, makes the sealing ring group in the sealing cavity be in three-way extrusion stress, forms a static sealing zero space between the wall penetration protection pipe and the cable or optical cable, and thus achieves the waterproof sealing effect.

Description

Technical Field

[0001] This invention belongs to the field of electrical engineering technology in industrial buildings, civil buildings, and municipal buildings, and relates to waterproof sealing technology when underground direct-buried cables and optical cables pass through the outer envelope wall. Specifically, it relates to a flexible waterproof sealing structure and construction method for underground direct-buried cables or optical cables passing through walls. Background Technology

[0002] Currently, in the electrical engineering of industrial buildings, civil buildings, and municipal engineering projects, when cables and optical cables are buried underground and pass through the external envelope walls of buildings and structures, they are usually installed using... Figures 1A to 1D The waterproof sealing structure shown achieves the waterproof sealing effect (see the national standard design and construction drawing collection "Laying of 110kV and Below Cables" 12D101-05, p102, p103, for laying schemes one, two, three, four, and five for direct-buried cables passing through walls and entering buildings; and "Laying of Underground Communication Cables" 05X101-2, p9, p10, for methods one, two, and three for introducing underground cables and optical cables into buildings, specifically into basements). These various waterproof sealing methods are summarized as follows: Figures 1A-1D The three basic implementation methods shown have the following limitations for on-site environments containing groundwater (including rainwater seeping into the ground), accompanied by settlement and expansion / contraction deformation of buildings and structures, as well as expansion / contraction deformation caused by the current heat of cables and optical fibers, and external working vibrations and torsion:

[0003] Figure 1A In the first embodiment shown, after the through-wall protection pipe 2 passes through the reserved through-wall hole 011 embedded in the wall 01, it is placed in the predetermined position and positioned with the required slope. Then, waterproof mortar is filled between the wall and the protection pipe to seal the gap between them. The gap between the cable or optical cable 1 and the through-wall protection pipe 2 also needs to be sealed. The construction method is to seal the gap between the pipe opening of the through-wall protection pipe 2 and the cable or optical cable 1 on the water-facing Z2 side (entry end) using "sealing the opening with hemp and pouring asphalt or other waterproof materials". That is, the gap between the through-wall protection pipe 2 and the cable or optical cable 1 is filled with hemp with a low density, and asphalt or other waterproof materials are poured and brushed at the opening.

[0004] This sealing method has the following drawbacks:

[0005] 1) Due to the small space of the reserved through-wall hole 011 in the wall 01, the area around the hole cannot be roughened, resulting in a leakage gap (cold front) between the sealed waterproof mortar layer 04 and the inner wall of the reserved through-wall hole 011. This leakage gap is defined as the first leakage channel LC1.

[0006] 2) Since the wall-penetrating protective pipe 2 is made of metal, the expansion coefficients of the wall 01 and the wall-penetrating protective pipe 2 are different, resulting in an expansion leakage gap between them. This expansion leakage gap is defined as the second leakage channel LC2.

[0007] 3) The strength grade of the waterproof mortar is lower than that of the original reinforced concrete structure wall, and no corresponding strength reinforcement measures have been taken, resulting in a short-plank effect in the overall wall structure; the water-facing Z2 end of the through-wall protection pipe 2 adopts a transitional extended structure, extending the through-wall protection pipe 2 to a width of more than 500mm beyond the water surface of the building's external structure. The purpose is to facilitate future maintenance and leak sealing without damaging the building's water surface and the insulation and waterproofing layer structure of the building's exterior facade. However, this causes additional destructive torque at the intersection of the wall 01 and the through-wall protection pipe 2, causing the sealing effect of the first leakage channel and the second leakage channel to fail prematurely, and even damaging the building structure wall at the intersection; 4) The sealing gap between the through-wall protection pipe 2 and the cable or optical cable 1 is the third leakage channel LC3. The through-wall protection pipe 2 at the water-facing Z2 and the cable or optical cable 1 are sealed with an oil-hemp sealing structure 03, that is, the space between the through-wall protection pipe 2 and the cable or optical cable 1 is filled with low-density oil-hemp, and asphalt or other waterproof materials are poured and brushed at the port. Among them, the hemp is placed in the axial open space inside the protective tube. The hemp only plays a unidirectional constraint and positioning role with rigid asphalt of too low strength grade. It cannot form a triaxial stress state of compression of the sealing material and thus play a static sealing role. When the protective tube or cable on the wall undergoes normal displacement and deformation, the rigid asphalt sealing material interacts with each other at the intersection of the sealing materials, and the resulting destructive structural gaps cause the sealing component to lose its function.

[0008] Figure 1B In the second embodiment shown, to seal the process cold joint (first leakage channel LC1) between the reserved through-wall hole 011 in the wall 01 and the waterproof mortar layer 04, a construction method is adopted in which the through-wall protection pipe 2 and the wall 01 are poured in one go. A wing ring plate 021 is welded to the outer wall of the through-wall protection pipe 2 and embedded in the wall 01 to form a waterstop plate. Similarly, a third leakage channel LC3 exists between the through-wall protection pipe 2 embedded in the reserved through-wall hole 011 in the wall 01 and the cable or optical cable 1. The waterproof sealing structure of the third leakage channel LC3 adopts the same... Figure 1A The embodiment shown uses the same oil-hemp sealing structure 03; however, the sealing and waterproofing method for the first leakage channel LC1 and the second leakage channel LC2 between the through-wall protective pipe 2 and the wall 01 adopts the form of a waterstop plate, that is, the wing ring plate 021 welded to the pipe body of the through-wall protective pipe 2 is pre-embedded in the wall 01 to form a waterstop plate. The improved structure still has the following shortcomings:

[0009] 1) Generally, metal through-wall protection pipe 2 and concrete are two different materials with different physical expansion coefficients, which will inevitably cause expansion and leakage gaps between them. Although the waterproof sealing effect of the waterstop plate is higher than that of the first implementation method, it is difficult to guarantee the waterproof sealing function under the condition of high groundwater level and high seepage pressure by relying on a single wing ring plate 021.

[0010] 2) The extended through-wall protection pipe 2 is pre-embedded in the wall 01 to form a cantilever load-bearing structure, which makes the wall 01 bear both bidirectional forces and large torsion. This will greatly increase the difficulty and construction cost of positioning, support, wall structure reinforcement, formwork support, concrete pouring and post-construction maintenance of the wall 01.

[0011] Figure 1C and Figure 1D In the third embodiment shown, the waterproof sealing structure of the first leakage channel LC1 and the second leakage channel LC2 between the through-wall sleeve 2 and the wall 01 is similar to... Figure 1B The second embodiment shown is the same; a flange-type sealing structure 02 is used to achieve waterproof sealing for the second leakage channel LC2 between the cable or optical cable 1 and the wall bushing 2. Specifically, an inner flange 021 is welded to the outside of the pipe opening of the wall bushing 2. Then, an oil-impregnated hemp rope 023 is wrapped around the cable or optical cable 1 and pushed towards the inner flange 021. Finally, an outer flange 022, fitted onto the cable or optical cable 1, is fastened to the inner flange with bolts, washers, and nuts. The oil-impregnated hemp rope is squeezed between the two flanges, sealing the pipe opening of the wall bushing 2. Although the improved sealing structure can generate axial compressive force to ensure a seal between the two flanges, the sealing material is not within a closed cavity, thus failing to generate radial compressive stress. Furthermore, there is a distance between the outer flange 022 and the pipe opening of the wall bushing 2, shifting the position of the second leakage channel LC2 backward by the distance of one flange. Even though the oil-impregnated hemp rope 023 expands when exposed to water, a sealed space cannot be formed (an open space exists longitudinally), making the waterproof sealing effect of this structure prone to failure. In addition, in this structure, the external wrapping of the cable or optical cable 1 with oil-impregnated hemp rope 023 is not fixed in form and the number of wrappings is not easy to quantify, which is not conducive to standardization. Summary of the Invention

[0012] To address one or more of the aforementioned problems, this invention provides a flexible waterproof sealing structure for underground direct-buried cable or optical cable wall-penetrating protective pipes.

[0013] The technical solution adopted in this invention is as follows:

[0014] A flexible sealing structure for underground direct-buried cables or optical cables passing through walls is provided for sealing underground direct-buried cables or optical cables passing through walls (01). The structure includes a wall-penetrating protective pipe (2) for housing the cable or optical cable and a flexible sealing assembly (3) at least disposed on the water-facing side of the wall-penetrating protective pipe (2). The flexible sealing assembly (3) includes:

[0015] The long pipe clamp (31) is threaded to the end of the through-wall protection pipe (2), and the end is provided with a threaded adjustment retaining ring (32);

[0016] An end locking cap (35) is threaded to the other end of a long pipe clamp (31); and

[0017] A flexible seal is located inside a long pipe clamp (31) between a threaded adjusting retaining ring (32) and an end locking cap (35). The flexible seal covers (e.g., a sealing ring assembly is fitted onto the cable or optical cable, or an asbestos rope or oil-impregnated jute rope is wrapped around the cable or optical cable) the cable or optical cable (1) and is located between the inner wall of the through-wall protection pipe (2) and the outer wall of the cable or optical cable (1).

[0018] In the above-mentioned flexible sealing structure for underground direct-buried cables or optical cables passing through walls, the flexible sealing element is composed of two half-joint sealing rings (33) and a sealing ring group (34) located between the two half-joint sealing rings (33), asbestos rope, or oil-impregnated jute rope. Each half-joint sealing ring (33) is a ring structure formed by the split connection of two semi-circular rings. Preferably, the half-joint lines L of the two half-joint sealing rings (33) fitted on the cable or optical cable (1) are perpendicular to each other.

[0019] In the above-mentioned flexible sealing structure for underground direct-buried cables or optical cables passing through walls, the sealing ring group (34) is sleeved on the cable or optical cable (1) and includes at least two sealing rings in extrusion contact, and the cross-section of the sealing ring is wedge-shaped or O-shaped.

[0020] In the above-mentioned flexible sealing structure for underground direct-buried cables or optical cables passing through walls, the inner diameter of the threaded adjustment retaining ring (32) is larger than the outer diameter of the cable or optical cable (1) through which the wall-penetrating protection pipe (2) passes, and the inner diameter of the half-joint sealing retaining ring (33) is consistent with the outer diameter of the cable or optical cable (1), and the outer diameter is smaller than the inner diameter of the long pipe clamp (31) and larger than the inner diameter of the threaded adjustment retaining ring (32).

[0021] In the above-mentioned flexible sealing structure for underground direct-buried cables or optical cables passing through walls, the end locking cap (35) includes a threaded part (351) and an end cap part (352). The threaded part (351) extends into the inside of the long pipe clamp (31) and is threadedly connected to the long pipe clamp (31). The end cap part (352) extends out of the end of the long pipe clamp (31).

[0022] In the above-mentioned flexible sealing structure for underground direct-buried cables or optical cables passing through walls, the inner hole of the threaded adjustment retaining ring (32) is a hexagonal hole, and the distance between opposite sides of the hexagonal hole is S = D + 10 mm, where D is the outer diameter of the largest specification cable or optical cable (1) that the wall-penetrating protection pipe (2) can pass through.

[0023] In the above-mentioned flexible sealing structure for underground direct-buried cables or optical cables passing through walls, at least three wing ring plates (21) are welded on the pipe body of the wall-penetrating protection pipe (2), and all wing ring plates (21) are embedded in the wall (01).

[0024] The present invention also provides a sealing structure for underground direct-buried cables or optical cables passing through walls. The sealing structure includes the flexible sealing structure for underground direct-buried cables or optical cables passing through walls as described in any of the above-mentioned claims and a reinforcing rib (013) provided in the wall (01). The reinforcing rib (013) is set at an angle to the conventional distribution rib (012) in the wall (01) around the reserved wall-penetrating hole (011). The reserved wall-penetrating hole (011) is located at the position of the pre-embedded wall-penetrating protective pipe (2) in the wall (01). Preferably, the angle between the conventional distribution rib (012) and the reinforcing rib (013) is 45°.

[0025] The present invention also provides a construction method for the above-mentioned flexible waterproof sealing structure for underground direct-buried cable or optical cable wall-penetrating protective pipe, comprising the following steps:

[0026] Step 1: Pre-embed the through-wall protection pipe (2) at the predetermined position of the wall (01) so that the wing ring plate (21) of the through-wall protection pipe (2) is completely embedded in the wall (01);

[0027] Step 2: Screw the long pipe clamp (31) with the built-in threaded adjustment retaining ring (32) onto the threaded end (22) of the through-wall protection pipe (2), and then pre-fit the sealing ring assembly (34) and the end locking cap (35) onto the cable or optical cable (1); install the two selected half-joint sealing retaining rings (33) on the cable or optical cable (1) so that the sealing ring assembly (24) is located between the two half-joint sealing retaining rings (33), and install the flexible seal formed by the two half-joint sealing retaining rings (33) and the sealing ring assembly (34) into place;

[0028] Step 3: Push the flexible seal into the long pipe clamp (31) in sequence until it contacts the threaded adjustment retaining ring (32). Then screw the threaded end of the end locking cap (35) into the long pipe clamp (31) so that the sealing ring group (34) in the sealing cavity forms sufficient pre-pressure and pre-tightening force, that is, the sealing ring group (34) is in a triaxial stress state to form a static seal.

[0029] In the above construction method, step one specifically includes:

[0030] 1) A reserved through-wall hole (011) is set at the position of the pre-embedded through-wall protection pipe (2) in the wall (01), and on the basis of the conventional distribution reinforcement (012) in the vertical and horizontal directions of the wall (01), reinforcement reinforcement (013) is arranged around the reserved through-wall hole (011) at an angle to the conventional distribution reinforcement (012) (preferably 45°).

[0031] 2) Tie or weld the wing ring plate (21) of the through-wall protective pipe (2) to the conventional distribution reinforcement (012) of the wall (01);

[0032] 3) Carry out formwork support and wall pouring, and pre-embed the through-wall protection pipe (2) in the wall (01).

[0033] By adopting the above technical solution, the present invention has the following characteristics and beneficial effects:

[0034] 1) This invention employs a flexible sealing assembly with a pre-compression and pre-tightening adjustment mechanism between the cable or optical cable and the wall-penetrating protective conduit. This flexible sealing assembly achieves both radial and axial bidirectional positioning. Radial positioning is achieved by the uniform sealing cavity formed by the wall-penetrating protective conduit and the periphery of the cable or optical cable, with the flexible seal within the completely enclosed cavity. Axial positioning is achieved by an axial bidirectional constraint device formed by a split retainer ring between the threaded retaining ring and the locking end cap. Through the pre-compression and pre-tightening of the threaded locking end cap, the sealing ring assembly within the sealing cavity is subjected to triaxial compressive stress, forming a static seal zero space on the third leakage channel LC3, thereby achieving a waterproof sealing effect. Meanwhile, the sealing component has sufficient mechanical strength and achieves the predetermined waterproof sealing effect under reasonable building settlement and cable stress deformation; the overall sealing structure is not lower than the overall wall strength, avoiding the short-plank effect of the original sealing structure. The sealing component is usually set on the water-facing (outdoor) Z2 side. Even if the water-facing sealing fails, there is no need to carry out earthwork excavation and repair work. This device can be directly installed on the back water-facing (indoor) Z1 side inside the building to achieve "redundancy technology". When sealing through-wall cables and optical cables in the extreme environment of seepage pressure in quicksand layer, the method of bidirectional simultaneous installation of sealing structure can be directly adopted.

[0035] 2) In this invention, the flexible seal is a combination of two half-joint sealing rings and a sealing ring group located between the two half-joint sealing rings. The friction between the flexible seal under triaxial stress and the outer wall of the cable plays a positioning role for the cable or optical cable at the entry point. After the cable or optical cable is installed in place, the split half-joint sealing ring is installed to avoid friction between the half-joint sealing ring and the cable or optical cable during the passage process, which would damage the outer insulation layer of the cable or optical cable and make the installation of the flexible seal more convenient.

[0036] 3) The flexible sealing component of this invention changes the open space of the original sealing gap. It uses the high strength performance of the two-part split sealing ring to make up for the low strength of the flexible sealing ring itself, ensuring that the overall sealing structure has the same strength as the building wall. At the same time, the assembly gap of the split sealing ring is used to block water flow and limit the flow, which is the function of pressure reducing orifice plate in water supply and drainage, thereby improving the overall sealing performance.

[0037] 4) For the first leakage channel LC1 between the through-wall protection pipe and the wall, at least three wing ring plates are provided on the pipe body. All wing ring plates are embedded in the wall, forming a "labyrinth structure" in mechanical sealing and playing a multiple "waterstop" effect in building sealing. At the same time, it improves the connection strength between the through-wall protection pipe and the wall, and reduces the construction difficulty and construction cost. For the stress concentration at the intersection of the long through-wall protection pipe and the wall, the present invention adopts a shorter through-wall protection pipe. The horizontal length of its two ends and the wall of the building structure only needs to meet the installation and operation space of the flexible sealing component and the normal operation space of the cable or optical cable when passing through the wall. Attached Figure Description

[0038] Figure 1A This is a structural schematic diagram of one of the existing waterproof sealing methods for underground direct-buried cables or optical cables passing through walls;

[0039] Figure 1B This is a schematic diagram of the second method for waterproof sealing when existing underground direct-buried cables or optical cables pass through walls;

[0040] Figure 1C This is a structural schematic diagram of the third method for waterproof sealing when existing underground direct-buried cables or optical cables pass through walls;

[0041] Figure 1D yes Figure 1C A magnified view of region K in the middle;

[0042] Figure 2A This is a schematic diagram of a first embodiment of the flexible waterproof sealing structure of the present invention;

[0043] Figure 2B This is a schematic diagram of the flexible sealing assembly;

[0044] Figure 2C This is a schematic diagram of the structure of the half-joint sealing ring;

[0045] Figure 2D This is an assembly diagram of the split seal ring;

[0046] Figure 2E This is a schematic diagram of one embodiment of a threaded adjusting retaining ring;

[0047] Figure 2F This is a schematic diagram of one embodiment of the end locking gland;

[0048] Figure 2G This is a schematic diagram of the wall structure reinforcement around the through-wall protection pipe of the present invention;

[0049] Figure 3 This is a schematic diagram of a second embodiment of the flexible waterproof sealing structure of the present invention.

[0050] The reference numerals in the figure are as follows:

[0051] 01-Wall structure, 011-Pre-reserved through-wall opening, 012-Standard distribution reinforcement, 013-Reinforcing reinforcement;

[0052] 02-Flange-type sealing structure, 021-Inner flange, 022-Outer flange, 023-Oil-impregnated hemp rope;

[0053] 03-Oil-hemp sealing structure; 04-Waterproof mortar layer;

[0054] LC1 - First leakage channel; LC2 - Second leakage channel; LC3 - Third leakage channel; H - Half gap; L - Half line;

[0055] 1-Electric cable or optical fiber;

[0056] 2- Through-wall protection pipe, 21- Wing ring plate, 22- Threaded end;

[0057] 3-Flexible sealing assembly, 31-Long pipe clamp, 32-Threaded adjusting retaining ring, 33-Half joint sealing retaining ring, 34-Sealing ring assembly, 35-End locking gland, 351-Threaded part, 352-End cover part;

[0058] Z1 - Backwater side (indoor), Z2 - Frontwater side (outdoor). Detailed Implementation

[0059] The following describes in detail the flexible waterproof sealing structure and construction method for underground direct-buried cables or optical cables passing through walls according to the present invention, with reference to the embodiments and accompanying drawings.

[0060] Figure 2A In the illustrated embodiment, the flexible waterproof sealing structure is used to seal underground direct-buried cables or optical cables 1 that pass through the wall 01. It includes a wall-penetrating protective pipe 2 and a flexible sealing component 3. The wall-penetrating protective pipe 2 is installed within a pre-reserved hole in the wall 01. The cable or optical cable 1 is sleeved inside the wall-penetrating protective pipe 2. The flexible sealing component 3 is at least located on the water-facing side Z2 of the wall-penetrating protective pipe 2 to seal the third leakage channel LC3 formed between the wall-penetrating protective pipe 2 and the cable or optical cable 1.

[0061] The existing structure of the through-wall protection pipe 2 is as follows: Figures 1A to 1CAs shown, the wall penetration protection pipe 2 is embedded in or passes through the reserved wall penetration hole 011 of the wall 01. Since there is a leakage channel LC1 between the wall penetration protection pipe 2 and the wall 01, in order to prevent water leakage from the leakage channel LC1, when embedding or passing through the wall penetration protection pipe 2, a waterproof mortar layer 04 is usually filled around the wall penetration protection pipe 2, or a wing ring plate 21 is welded on the pipe body of the wall penetration protection pipe 2. Since the wall penetration protection pipe 2 and the wall 01 (concrete) are different types of building materials with a large difference in thermal expansion coefficient, a leakage gap is generated between the wall penetration protection pipe 2 and the wall 01. The waterproof mortar layer 04 that interacts with the wall and the single wing ring plate 21 wrapped in the wall alone cannot guarantee the waterproof sealing effect when the groundwater level is high and the seepage pressure is high.

[0062] To prevent leakage from occurring in the gaps between the contacting parts, in this embodiment, at least three wing ring plates 21 are welded to the body of the through-wall protection pipe 2. All wing ring plates 21 are embedded in the wall 01, forming a "maze structure" in mechanical sealing, which is equivalent to the multi-layer "waterstop" effect in building sealing. Even if there is a gap between the wing ring plate 21 and the wall 01, if the leaking water wants to penetrate to the back water side (indoor) Z1 side (indoors of a general building), the leaking water needs to pass through each wing ring plate in sequence. Each time it passes through a wing ring plate, the leaking water needs to go through a 90° uphill process. This process rapidly reduces the seepage pressure, which plays a role in blocking and stopping water. The maze-like sealing structure formed by multiple wing ring plates consumes the seepage pressure of the leaking water in sequence, making it impossible for the leaking water to pass through the last line of defense and then penetrate into the interior of the building.

[0063] The conventional construction method for existing pre-embedded through-wall protective pipes 2 is to cut the reinforcing steel bars at the location of the pipe to form a pre-reserved through-wall hole 011. This method can cause a local reduction in the strength of the pre-reserved through-wall hole 011 in the wall 01, and may even cause the seismic parameters of the wall 01 to fail to meet the requirements. Therefore, this invention, based on factors such as the location of the pre-reserved through-wall hole 011, the size of the sleeve, and the degree of damage to the wall 01, adopts structural reinforcement measures to ensure that the pre-reserved through-wall hole 011 does not reduce the strength performance of the original wall. See [link to relevant documentation]. Figure 2E The specific reinforcement structure is as follows: based on the conventional distributed reinforcement bars 012 in the vertical and horizontal directions of the wall 01, the number of broken reinforcement bars is minimized, and reinforcing bars 013 are arranged at an angle to the conventional distributed reinforcement bars 012 around the reserved through-wall hole 011. Preferably, the angle between the conventional distributed reinforcement bars 012 and the reinforcing bars 013 is 45 degrees. This structure is used to compensate for the local strength of the wall 01.

[0064] When fabricating the aforementioned through-wall protection pipe 2, all flange plates 21 are fully welded to the pipe body of the through-wall protection pipe 2. The through-wall protection pipe 2 is pre-embedded in the wall 01 in conjunction with structural reinforcement work. The specific pre-embedding process of the through-wall protection pipe 2 is as follows: First, the flange plates 21 of the through-wall protection pipe 2 are welded and reinforced to the conventional distribution reinforcement 012 of the wall 01. Then, reinforcing reinforcement 013 is laid out, and the formwork is supported for pouring. Second, the wall 01 is poured. After the curing period is completed, the formwork is removed. The through-wall protection pipe 2 should generally extend 1m beyond the wall 01 on the water-facing (outdoor) Z2 side and should have an appropriate waterproof slope (inclined 5-10 degrees towards the water-facing side).

[0065] See Figure 2A In this embodiment, the flexible sealing component 3 is disposed at the end of the through-wall protection pipe 2. The flexible sealing component 3 is installed at least at the inlet end on the water-facing Z2 side of the through-wall protection pipe 2. If necessary, the flexible sealing component 3 can be installed at both the backwater Z1 side and the water-facing Z2 side of the through-wall protection pipe 2. Specifically, the end of the through-wall protection pipe 2 is provided with a threaded end 22, and the flexible sealing component 3 is threadedly connected to the threaded end 22 of the through-wall protection pipe 2.

[0066] See Figure 2BIn this embodiment, the flexible sealing assembly 3 includes a long pipe clamp 31, a flexible sealing element located inside the long pipe clamp 31, and an end locking cap 35 installed at the end of the long pipe clamp 31. The long pipe clamp 31 is a hollow tube with a threaded adjusting retaining ring 32 inside. The inner diameter of the threaded adjusting retaining ring 32 is larger than the outer diameter of the cable or optical cable 1, providing sufficient space for the cable or optical cable 1 to pass through the long pipe clamp 31 and preventing wear on the outer sheath of the cable or optical cable 1 during passage. The two ends of the long pipe clamp 31 are respectively... It is provided with an internal thread, one end of which is connected to the threaded end 22 of the through sleeve 2, and the other end is used to install the end locking cover 35; a flexible sealing element is provided between the threaded adjustment retaining ring 32 and the end locking cover 35, which is formed by two half-joint sealing retaining rings 33 and a sealing ring group 34. The sealing ring group 34 is located between the two half-joint sealing retaining rings 33. The inner diameter of the half-joint sealing retaining ring 33 is consistent with the outer diameter of the cable or optical cable 1, and the outer diameter is smaller than the inner diameter of the long pipe clamp 31 and larger than the inner diameter of the threaded adjustment retaining ring 32. The threaded adjusting retaining ring 32 and the end locking cap 35, together with the half-joint sealing retaining ring 33, form a sealed cavity with the inner wall of the through-wall protection pipe 2. The sealing ring assembly 34 is located within this sealed cavity. The end locking cap 35 presses the half-joint sealing retaining ring 33, thereby squeezing the sealing ring assembly 34 within the sealed cavity. This puts the sealing ring assembly 34 under triaxial stress, sealing the assembly gap within the cavity and forming a zero-space seal. The sealing ring assembly 34, under the combined action of the sealing surfaces of the through-wall protection pipe 2 and the cable or optical cable 1 (i.e., the inner wall of the through-wall protection pipe 2 and the outer wall of the cable or optical cable 1) and the double-sided half-joint sealing retaining rings, is in a state of contact stress, thus forming a static seal. The threaded adjusting retaining ring 32 and the end locking cap 35 have the function of axially positioning and constraining the half-joint sealing ring 32.

[0067] The external thread of the threaded adjusting retainer ring 32 mates with the internal thread of the long pipe clamp 31. The specification of the split sealing retainer ring 33 is selected according to the gap between the outer diameter of the cable or optical cable 1 and the inner diameter of the long pipe clamp 31. By adjusting the threaded adjusting retainer ring 32, the axial distance between the threaded adjusting retainer ring 32 and the end locking cover 35 is adjusted to match the split sealing retainer ring 33 of different specifications, so that the sealing ring group 34 located in the sealing cavity forms radial and axial compressive stress.

[0068] Preferred, such as Figure 2EAs shown, in this embodiment, the inner hole of the threaded adjusting retainer 32 is hexagonal. A hexagonal wrench can be used to adjust the position of the threaded adjusting retainer 32 within the long pipe clamp 31. The distance S between opposite sides of the hexagonal hole is determined based on the outer diameter D of the largest specification cable or optical cable 1 that the through-wall protection pipe 2 can pass through. Preferably, S = D + 10 mm, so that the same specification of threaded adjusting retainer 32 can be used for long pipe clamps 31 of the same specification. Here, the cable or optical cable 1 is a cable or optical cable of various specifications that are readily available on the market.

[0069] In principle, the inner diameter of the split sealing ring 33 is consistent with the outer diameter of the cable or optical cable 1 (without considering the reserved assembly gap), and the outer diameter is smaller than the inner diameter of the long pipe clamp 31 and larger than the inner diameter of the threaded adjustment ring 32. Considering that both the inner and outer diameters of the split sealing ring 33 must meet the dynamic assembly requirements, the reserved assembly gap should be matched with the specifications of the through-wall protection pipe 2 and the outer diameter of the cable or optical cable 1. For example, the inner diameter of the split sealing ring 33 is preferably 2mm-4mm larger than the outer diameter of the cable or optical cable 1, and the outer diameter of the split sealing ring 33 is preferably 2mm-4mm smaller than the inner diameter of the thread of the long pipe clamp 31. The split sealing ring 33 can be produced in a standardized and marketable manner.

[0070] like Figure 2F As shown, the end locking cap 35 includes a threaded portion 351 and an end cap portion 352. The threaded portion 351 extends into the interior of the long pipe clamp 31 and is threadedly connected to the long pipe clamp 31. The end cap portion 352 extends out of the long pipe clamp 31, and the outer diameter of the end cap portion 352 is larger than the outer diameter of the long pipe clamp 31. Preferably, the end cap portion 352 is hexagonal to facilitate the use of a wrench to lock and position the end locking cap 35 onto the long pipe clamp 31.

[0071] Preferably, the long pipe clamp 31 has a continuous internal thread inside, one end of which is connected to the threaded end 22 of the wall-penetrating protective pipe 2, and the other end is used to install the end locking cap 35. The inner diameter d of the end locking cap 35 is determined by the outer diameter D of the largest specification cable or optical cable 1 that the wall-penetrating protective pipe 2 can pass through, that is, d = D + 10 mm, so that the same specification of long pipe clamp 31 can use the same specification of end locking cap 35 (another purpose of the end locking cap 35 is to improve the strength between the wall-penetrating protective pipe 2 and the cable or optical cable 1, to ensure the same strength as the wall 01, and at the same time play a water-blocking role, reducing and improving the sealing effect of the flexible sealing component 3).

[0072] The sealing ring assembly 34 located within the sealed cavity can be a wedge-shaped rubber ring or an O-ring (i.e., the cross-section of the sealing ring is wedge-shaped or O-shaped), or it can be replaced with asbestos rope or oil-impregnated jute rope. Preferably, the sealing ring assembly 34 consists of multiple wedge-shaped rubber sealing rings, which have sufficient elasticity.

[0073] In another embodiment, see Figure 3 Flexible sealing components 3 are installed at both ends of the wall-penetrating protective pipe 2. The flexible sealing component 3 on the back water side Z1 of the wall-penetrating protective pipe 2 is a backup of the flexible sealing component 3 on the front water side Z2.

[0074] See Figure 2C The split sealing ring 33 is a circular structure formed by the combination of two semi-circular rings. Its inner diameter should be larger than the outer diameter of the cable, preferably 2mm-4mm larger, and its outer diameter should be smaller than the inner diameter of the threaded long pipe clamp 31, preferably 2mm-4mm smaller. To facilitate processing and reduce production costs, the split sealing ring 33 can be manufactured using an integral circular ring cutting process, i.e., using wire cutting to divide the integral circular ring into two parts. The resulting split line L (the seam formed at the joint of the two semi-circular rings of the split sealing ring 33) and the resulting split gap H (the gap formed at the joint of the two semi-circular rings of the split sealing ring 33) meet the predetermined requirements (when using non-metallic nylon materials, a cutting gap may exist).

[0075] When installing the flexible sealing assembly 3, first screw one end of the long pipe clamp 31, which has an internal threaded adjusting retaining ring 32, onto the threaded end 22 of the through-wall sleeve 2. Then, pre-fit the sealing ring assembly 34 and the end locking cap 35 onto the cable or optical cable 1. Since the sealing ring of the sealing ring assembly 34 has sufficient elasticity, the inner diameter of the end locking cap 35 is larger than the outer diameter of the cable or optical cable 1, which will not affect the laying of the cable or optical cable 1. After the cable or optical cable 1 is laid in place, select a half-joint sealing retaining ring 33 with an inner diameter of the corresponding specification according to the specifications of the cable or optical cable 1, and install the two half-joint sealing retaining rings 33 of the corresponding specification on the cable or optical cable 1, so that the sealing ring assembly 34 is located between the two half-joint sealing retaining rings 33. Preferably, the half-joint lines L of the two half-joint sealing retaining rings 33 are perpendicular to each other (see Figure 2D When the flexible seal formed by the two half-joint sealing rings 33 and the sealing ring group 34 is installed in place, it is pressed and pushed into the long pipe clamp 31 in sequence until it contacts the threaded adjusting ring 32. Then, the threaded end of the end locking cap 35 is screwed into the long pipe clamp 31, so that the sealing ring group 34 forms a pre-tightened and compressed triaxial stress state.

[0076] The flexible sealing component 3 described above can be installed without cutting the cable or optical cable 1 after it has been laid and installed in place. At the same time, the half-joint sealing ring 33 compresses the sealing ring group 34, causing the sealing ring group 34 to press the cable or optical cable 1, which plays a positioning role for the cable or optical cable 1. At the same time, it forms a uniform sealed cavity with the wall-penetrating protective pipe 2 and the periphery of the cable or optical cable 1. Under the bidirectional constraint and locking pressure of the threaded adjustment ring 32 and the end locking cap 35, the two half-joint sealing rings 33, respectively, allow the wedge-shaped rubber ring to flow reasonably in a predetermined direction within the completely closed cavity, so that the inner wall of the sealed cavity generates compressive stress, forming a zero-space flow seal, thereby achieving a waterproof sealing effect.

[0077] The above structure can not only be used to seal the pipe openings at the entrance and exit of the building structure through the outer wall, but can also be installed in the segmented electrical well with a ring network structure as a shut-off valve for the mutual flow of water between the shut-off pipe diameters (defined as the electrical well anti-backflow shut-off valve), which can solve the technical problem of water backflow caused by unreasonable slope of the outdoor electrical pipe network.

[0078] The application of the above-mentioned flexible waterproof sealing structure for underground direct-buried cables and optical cables passing through walls will be illustrated by taking a cement plant in East Asia as an example.

[0079] The cement plant is located in East Asia, with complex geological and hydrological conditions, high groundwater level, and high seepage pressure. A cross-linked polyethylene power cable with specification YJV-10KV / 3×95 is to be passed through the outer structural enclosure wall of the kiln head workshop, which is adjacent to the crushing workshop, and enter the cable trench inside the workshop to connect to multiple grate cooler equipment in the kiln head workshop. The wall thickness is 500mm, and the outer wall is a reinforced concrete structure.

[0080] The power cables of this cement plant have the following characteristics: the power cables will have significant temperature changes depending on the magnitude of the current; due to the heavy industrial plant adjacent to the ore crushing workshop, there is a large radial and longitudinal torsional deformation at the intersection of the wall-penetrating protective pipe 2 and the cable; the surrounding environment is harsh and the geological conditions are complex, and the buildings will experience severe settlement and vibration deformation.

[0081] The above characteristics dictate that the flexible sealing assembly 3 of this invention should be installed simultaneously at both ends of the through-wall protection pipe 2 (see [reference]). Figure 3 ).

[0082] Referring to the national standard GB12706-2008, the outer diameter D of the YJV-10KV / 3×95 cable is 62mm. The wall-penetrating protective pipe 2 is a galvanized steel pipe DN100. According to the standard "Waterproof Sleeves" 02S404, the outer diameter R1 of the wall-penetrating protective pipe 2 is 108mm, the wall thickness TH1 is 4.5mm, and the inner diameter R2 is 108mm - 2 × 4.5mm = 99mm. According to the standard dimensions of DN100 pipe clamps, the outer diameter R3 is 120mm, the wall thickness TH2 is 5mm, and the inner diameter R4 is 120mm - 2 × 5mm = 110mm.

[0083] Based on the above design, determine the specifications and dimensions of the threaded adjusting retaining ring 32, the half-joint sealing retaining ring 33, the long pipe clamp 31, and the end locking gland 35, where:

[0084] According to the provisions of "Laying of 110kV and Below Cables" 12D101-05 and "Laying of Underground Communication Cables" 05X101-2, the diameter of the wall-penetrating protective pipe 2 shall not be less than 1.5 times the outer diameter of the cable. When using a DN100 type wall-penetrating protective pipe 2, the maximum outer diameter of the cable passing through the wall-penetrating protective pipe 2 is Dmax = R2 / 1.5 = 99mm / 1.5 = 66mm, which meets the requirements.

[0085] The inner hole of the threaded adjusting retainer ring 32 is hexagonal, and the dimension across the sides S = maximum cable outer diameter Dmax + fit clearance between the cable and the inner diameter of the threaded adjusting retainer ring 32 = 66mm + 9mm = 75mm; the outer diameter of the threaded adjusting retainer ring 32 is a G4-inch pipe thread, the axial thickness is 10mm, and the material is Q235A (welding technical requirements refer to "Waterproof Sleeve" 02S404, this component is suitable for various cables passing through within the DN100 specification).

[0086] The outer diameter of the clamp sealing ring 33 = the inner diameter of the long pipe clamp 31 - the fitting clearance between the clamp sealing ring 33 and the long pipe clamp 31 = 110mm - 5mm = 105mm; the inner diameter of the clamp sealing ring 33 = the outer diameter of the cable + the fitting clearance between the clamp sealing ring 33 and the outer diameter of the cable = 62mm + 5mm = 67mm; the axial thickness = 10mm (metal material) or thickness = 15mm (nylon material). The material of the clamp sealing ring 33 can be carbon steel, cast copper, or nylon, with Q235 carbon steel being preferred. The clamp sealing ring 33 can be produced in a standardized, serialized, and market-oriented manner according to the configuration of the cable it traverses.

[0087] Design for the sealing cavity between the long pipe clamp 31 and the cable:

[0088] The radial clearance of the single-sided sealing cavity = (inner diameter of the long pipe clamp 31 - outer diameter of the cable) / 2 = (110mm - 62mm) / 2 = 24mm; the sealing ring group 34 is composed of two O-rings, the sealing ring wire diameter = radial clearance of the single-sided sealing cavity = 24mm, the sealing ring inner diameter = cable outer diameter = 62mm, so the sealing ring outer diameter = sealing ring inner diameter + 2 × sealing ring wire diameter = 62mm + 2 × 24mm = 110mm; the axial sealing length = 2 × sealing ring wire diameter = 2 × 24mm = 48mm (when using sealing materials such as asbestos rope or oil-impregnated jute rope, the axial sealing length shall not be less than the length of the wedge seal and the length of the O-ring seal for flexible waterproof sleeves specified in the "02S404 Waterproof Sleeve Atlas"); similarly, the sealing ring group 34 can be standardized, serialized and marketed according to the configuration of the cable passing through.

[0089] Design for end locking cap 35:

[0090] The inner diameter of the end locking cap 35 = the outer diameter of the maximum through cable + the through fit clearance = 66mm + 10mm = 76mm. The outer diameter of the end locking cap 35 is a G4-inch pipe thread, the axial length is 60mm, and the material is preferably Q235 carbon steel.

[0091] Design of long pipe clamp 31:

[0092] The long pipe clamp 31 is made of Q235 carbon steel DN100 tapered pipe with an effective thread engagement length of 27mm. The axial length of the long pipe clamp 31 = engagement length + guarantee clearance + axial thickness of threaded adjusting retaining ring 32 + axial thickness of 2 × half joint sealing retaining ring 33 + axial sealing length of sealing ring group 34 + locking distance = 27mm + 10mm + 10mm + 2 × 10mm + 48mm + 27mm = 142mm. Therefore, the axial length of the long pipe clamp 31 is taken as the standard size of 150mm.

[0093] Sealing design between through-wall protective pipe 2 and wall 01:

[0094] The through-wall protection pipe 2 adopts a three-winged ring plate 21 structure and is pre-embedded in the wall 01 (see "02S404 Waterproof Sleeve Design Atlas"); the outer diameter of the winged ring plate 21 is 210mm, the inner diameter of the winged ring plate 21 is the outer diameter of the through-wall protection pipe 2 + the fitting clearance = 108mm + 2mm = 110mm, and the thickness of the winged ring plate 21 is 10mm; the material used is Q235A, and the welding technology refers to "02S404 Waterproof Sleeve Atlas".

[0095] Since the surrounding construction site lacked external processing capabilities, on-site fabrication was adopted. The pipe body of the through-wall protective pipe 2 was made of standard DN200 ordinary steel pipe, and the flange plate 21 was welded to the pipe body of the through-wall protective pipe 2 using standard DN200 flange plates. Currently, wedge-shaped rubber rings and O-rings are not yet standardized or serialized in their corresponding specifications. At present, O-rings are fabricated on-site from O-rings, or asbestos ropes, oil-impregnated jute ropes, etc., are used as substitutes, with equally good results.

[0096] Specifically, the construction method of the above-mentioned flexible waterproof sealing structure includes the following steps:

[0097] Step 1: Pre-embed the through-wall protection pipe 2 at the predetermined position in the wall 01, so that the wing ring plate 21 of the through-wall protection pipe 2 is completely embedded in the wall 01.

[0098] Specifically including (see) Figure 2E ):

[0099] 1) Set a reserved through-wall hole 011 at the location of the pre-embedded through-wall protection pipe 2 in the wall 01, and on the basis of the conventional distribution reinforcement 012 in the vertical and horizontal directions of the wall 01, set up reinforcement 013 (preferably at an angle of 45°) around the reserved through-wall hole 011.

[0100] 2) Tie or weld the wing ring plate 21 of the through-wall protective pipe 2 to the structural steel bars (conventional distribution bars 012) of the wall 01;

[0101] 3) Carry out formwork support and wall pouring, and pre-embed the through-wall protection pipe 2 in the wall 01.

[0102] Step 2: Screw the long pipe clamp 31 with the built-in threaded adjustment retaining ring 32 onto the threaded end 22 of the through-wall protection pipe 2. Then, pre-fit the sealing ring assembly 34 and the end locking cap 35 onto the cable or optical cable 1. Install the two half-joint sealing retaining rings 33 of the selected appropriate specifications onto the cable or optical cable 1, so that the sealing ring assembly 34 is located between the two half-joint sealing retaining rings 33. Install the flexible seal formed by the two half-joint sealing retaining rings 33 and the sealing ring assembly 34 into place.

[0103] Step 3: The flexible seal formed by the two half-joint sealing rings 33 and the sealing ring group 34 is sequentially squeezed and pushed into the long pipe clamp 31 until it contacts the threaded adjusting ring 32. Then, the threaded end of the end locking cap 35 is screwed into the long pipe clamp 31, so that the sealing ring group 34 in the sealing cavity forms a sufficient pre-compression and pre-tightening force, that is, the sealing ring group 34 is in a triaxial stress state to form a static seal.

[0104] After installation, apply yellow grease to the threaded connections between the long pipe clamp 31 and the through-wall protective pipe 2, as well as the end locking cap 35 and the long pipe clamp 31, wrap with fiberglass cloth, and perform anti-corrosion treatment with emulsified asphalt. Use fine sand to backfill around the through-wall protective pipe 2 and the cable or optical cable 1, and cover the backfill with a protective board (see the "02S404 Waterproof Sleeve Design Atlas" for construction process).

[0105] Those skilled in the art should understand that these embodiments are only for illustrating the present invention and do not limit the scope of the present invention. All equivalent variations and modifications made to the present invention are within the scope of the present invention.

Claims

1. A flexible sealing structure for underground direct-buried cable or optical cable wall-penetration, for sealing underground direct-buried cable or optical cable penetrating through a wall (01), comprising a wall-penetration protection tube (2) for sleeving the cable or optical cable, characterized in that, Further comprising a flexible sealing assembly (3) arranged at least on the water-facing side of the through-wall protection tube (2), the flexible sealing assembly (3) comprising: a long tube clamp (31) threadedly connected to the through-wall protection tube (2) at its end, and provided with a threaded adjusting ring (32) inside the long tube clamp (31) to adjust the axial installation space, the inner hole of the threaded adjusting ring (32) being hexagonal, and the distance (S) between opposite sides being greater than the maximum outer diameter (D) of the cable or optical cable that the through-wall protection tube (2) can pass through; an end locking gland (35) comprising a threaded portion (351) and an end cover portion (352), the threaded portion (351) extending into the interior of the long tube clamp (31) and being threadedly connected to the long tube clamp (31), and the end cover portion (352) extending out of the end of the long tube clamp (31); and a flexible sealing member comprising two half-joint sealing rings (33) made of metal and at least two O-shaped sealing rings stacked to form a sealing ring group (34) between the two half-joint sealing rings (33), the inner diameter of the half-joint sealing ring (33) being consistent with the outer diameter of the cable or optical cable (1), the outer diameter being smaller than the inner diameter of the long tube clamp (31) and greater than the inner diameter of the threaded adjusting ring (32), and the half-joint lines L of the two half-joint sealing rings (33) being perpendicular to each other when the two half-joint sealing rings (33) are sleeved on the cable or optical cable (1); the threaded adjusting ring (32), the end locking gland (35) and the half-joint sealing ring (33) cooperate to form a sealed cavity between the inner wall of the long tube clamp (31), and the sealing ring group (34) is located in the sealed cavity; when the end locking gland (35) is screwed into the long tube clamp (31), the end cover portion (352) abuts against the end face of the long tube clamp (31), axially compresses the half-joint sealing ring (33), and further extrudes the sealing ring group (34), so that the O-shaped sealing ring is simultaneously subjected to axial compression and radial expansion, the radial expansion force is constrained in the sealed space formed by the two half-joint sealing rings (33) and the inner wall of the long tube clamp (31), and the sealing ring group (34) is in a three-way compression stress state, thereby forming static sealing with the inner wall of the long tube clamp (31) and the outer wall of the cable or optical cable (1), respectively.

2. The flexible sealing structure for wall penetration of a direct-buried electric or optical cable according to claim 1, characterized by, Each half-joint sealing ring (33) is a circular ring structure formed by two half-circular rings being butted together.

3. The flexible sealing structure for wall penetration of a direct-buried electric or optical cable according to claim 1 or 2, characterized in that, The distance S between opposite sides of the hexagonal hole of the threaded adjusting ring (32) is equal to D+10mm, where D is the outer diameter of the largest size cable or optical cable (1) that the through-wall protection tube (2) can pass through.

4. The flexible sealing structure for wall penetration of a direct-buried electric or optical cable according to claim 1 or 2, characterized by, At least three wing ring plates (21) are welded on the tube body of the through-wall protection tube (2), and all the wing ring plates (21) are embedded into the wall (01).

5. A sealing structure for a wall penetration of a direct-buried electric or optical cable, characterized by The flexible sealing structure for the underground directly buried cable or optical cable passing through the wall according to any one of claims 1 to 4 and a reinforcing rib (013) arranged in the wall (01) are provided, the reinforcing rib (013) is arranged at an angle with the conventional distribution rib (012) in the wall (01) around the reserved through-wall hole (011), and the reserved through-wall hole (011) is located at the position where the through-wall protection tube (2) is embedded in the wall (01).

6. The sealing structure for a wall passage of a direct-buried electric or optical cable according to claim 5, characterized by The angle between the conventional distribution rib (012) and the reinforcing rib (013) is 45°.

7. A construction method of the waterproof sealing structure of the underground directly buried cable or optical cable through the wall according to any one of claims 1 to 4, comprising the following steps: Step one, embed the through-wall protection pipe (2) in the predetermined position of the wall body (01), so that the wing ring plate (21) of the through-wall protection pipe (2) is completely embedded in the wall body (01); Step two, use a wrench to insert the hexagonal inner hole of the threaded adjusting check ring (32), rotate to adjust the initial position of the threaded adjusting check ring (32) in the long pipe clamp (31) to adapt to the outer diameter of the cable or optical cable (1); screw the long pipe clamp (31) with the threaded adjusting check ring (32) into the threaded end (22) of the through-wall protection pipe (2), and pre-thread the sealing ring group (34) and the end locking gland (35) on the cable or optical cable (1); install the selected two half joint sealing check rings (33) on the cable or optical cable (1), so that the sealing ring group (34) is located between the two half joint sealing check rings (33), and the flexible sealing member formed by the two half joint sealing check rings (33) and the sealing ring group (34) is installed in place; Step three, the flexible sealing member is sequentially pressed into the long pipe clamp (31) until it contacts the threaded adjusting check ring (32), and then the threaded end of the end locking gland (35) is screwed into the long pipe clamp (31) until the end cover part (352) abuts against the end face of the long pipe clamp (31), at this time the compression force transmitted by the half joint sealing check ring (33) makes the sealing ring group (34) be compressed, so that the sealing ring group (34) in the sealing cavity forms sufficient pre-compression pre-tightening force, that is, the sealing ring group (34) is in a three-way stress state to form a static seal.

8. The construction method according to claim 7, characterized in that, The step one specifically comprises: 1) Set a reserved through-wall hole (011) at the position of embedding the through-wall protection pipe (2) in the wall body (01), and arrange reinforcing ribs (013) around the reserved through-wall hole (011) at an angle with the conventional distribution ribs (012) on the basis of the vertical and horizontal conventional distribution ribs (012) of the wall body (01); 2) Bind or weld the wing ring plate (21) of the through-wall protection pipe (2) and the conventional distribution rib (012) of the wall body (01); 3) Perform formwork support and wall pouring to embed the through-wall protection pipe (2) in the wall body (01).

9. The construction method according to claim 8, characterized in that, The angle of the reinforcing rib (013) with the conventional distribution rib (012) is 45 o .

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