CN114045880A

CN114045880A - Basement post-cast strip treatment process

Info

Publication number: CN114045880A
Application number: CN202111523760.7A
Authority: CN
Inventors: 茹瑞春; 马奇立; 林王剑; 王明锋; 陶浙峰; 斯迪龙; 杨小军; 石焰秋; 寿超; 王莹; 申江会; 韩敏
Original assignee: Hangzhou Dongsheng Construction Engineering Co ltd; Hangzhou Zhongzhou Construction Engineering Group Co ltd
Current assignee: Hangzhou Dongsheng Construction Engineering Co ltd; Hangzhou Zhongzhou Construction Engineering Group Co ltd
Priority date: 2021-12-14
Filing date: 2021-12-14
Publication date: 2022-02-15
Anticipated expiration: 2041-12-14
Also published as: CN114045880B

Abstract

The invention provides a basement post-cast strip process which comprises a post-cast strip reserving stage measure, a post-cast strip sealing stage measure and a terrace pouring stage organized drainage measure. According to the invention, the L-shaped PVC pipe is reserved, the water stopping sleeve is sleeved on the L-shaped PVC pipe and is communicated with the nearby water collecting well, the floor drain cover is covered, and meanwhile, the circular arc is formed when the surface of the floor drain is poured and collected in the post-pouring belt, so that the floor drain can automatically drain, the cleaning is convenient, the efficiency is improved, and the labor input is reduced. In addition, a gravel layer and non-woven fabrics are laid on the groove part of the post-pouring belt, a reinforced concrete protective layer is poured on the gravel layer, and straw ropes are longitudinally and transversely laid and led to a drainage ditch before terrace pouring, so that a drainage system is formed, and the dryness of the ground is ensured. Meanwhile, the water stop sleeve used in the process is simple in structure, is convenient to install with a reserved pipeline, and improves the installation efficiency; the stability and the skid resistance of the position of the metal sleeve are improved by arranging the metal sleeve.

Description

Basement post-cast strip treatment process

Technical Field

The invention belongs to the technical field of building construction, and particularly relates to a basement post-cast strip process.

Background

The basement post-cast strip is a concrete strip which is reserved in structures such as beams, plates (including foundation bottom plates) and walls and has a certain width and is poured after a certain time in order to adapt to the influences of factors such as environmental temperature change, concrete shrinkage and uneven settlement of the structure.

It is common that the bottom board wallboard penetrates through the whole basement and has long retention time. The post-cast strip is often a weak link in the actual construction process, and more common diseases are easy to appear: a large amount of accumulated water exists in the pouring zone after the basement foundation is left for a long time, water-stopping steel plates, reinforcing steel bars and other iron parts are soaked in water for a long time and rusted, the sewage and concrete surface form moss and other attachments which cannot be cleaned, the basement area is too large, organized drainage cannot be achieved, the manual drainage workload is huge, and especially after the post-pouring zone is closed, the structural layer generates common potential hazards such as secondary leakage due to the change and disturbance of external factors. For example, chinese patent CN201910393868.5 discloses a basement post-cast strip anti-seepage construction method, the structure includes a water-absorbing expansion layer, a water stop strip, a concrete cushion layer, a reinforced concrete layer, a water-absorbing layer and the like, which are arranged on the post-cast strip, and can play a good role in infiltration, and the concrete cushion layer is more beneficial to the pouring and forming of the subsequent concrete. But the problems that metal components are soaked in water and rusted, attachments on concrete are difficult to clean and basement drainage is difficult due to water accumulation in the retention period of the post-cast strip are not solved.

For example, chinese patent CN201810328521.8 discloses a construction process of a basement post-cast strip, which comprises fixing a steel plate on a wall of the basement post-cast strip, waterproofing the whole basement wall, backfilling earthwork in the basement post-cast strip, and pouring concrete in the basement post-cast strip and curing the concrete after the backfilling. The patent also does not deal with the problem of draining water accumulated during the retention period of the post-cast strip of the basement.

The water stop sleeve is needed in the anti-leakage construction of the post-cast strip of the basement, and the structure is diversified. The mode that the floor was worn to the installation when floor was mostly adopted to the vertical pipeline of current PVC, exists in the work progress and uses pipe fitting and interface more, the expense is higher, cause the condition such as a plurality of hidden danger points of leaking. In the current practical application, because the building warp and the house sinks the problem, lead to the interior stagnant water sleeve pipe of wall often very easily to damage, because it is the plastic construction mostly, more easily by the wall extrusion damage.

Therefore, how to provide a process can effectively solve the problem of cleaning caused by accumulated water in the retention period of the later poured band of the basement, eliminate the hidden danger of water seepage caused by the fact that metal components are soaked in water and rusted, solve the problem that attachments generated on concrete due to the reasons of sewage and the like are difficult to clean, and simultaneously design a stable and self-protective water stop sleeve, which is a technical problem to be solved urgently by technical personnel in the field.

Disclosure of Invention

In view of the above, the present invention aims to provide a basement post-cast strip process, which adopts a series of measures to avoid the problems of long-term water accumulation of the basement post-cast strip, water soaking and rusting of metal members, difficulty in cleaning attachments generated on concrete, and the like.

In order to achieve the above purpose, the present application provides the following technical solutions:

a basement post-cast strip process comprises post-cast strip reservation stage measures, wherein the post-cast strip reservation stage measures comprise the following measures:

measure 101: when the earthwork is excavated, an L-shaped PVC pipe is pre-buried at the reserved position of the post-cast strip and is communicated with a nearby water collecting well;

step 102: enlarging a concrete pouring finish surface of the basement floor and a protective layer of a post-pouring strip steel bar;

step 103: and after the post-pouring belt cushion layer is finished, covering the post-pouring belt cushion layer by using a floor drain cover.

Preferably, the basement post-cast strip process further comprises a post-cast strip sealing stage measure and a terrace pouring stage organized drainage measure.

Preferably, the post-cast strip closing stage measures comprise the following measures:

measure 201: before the concrete of the post-cast strip is poured, sleeving a water stop sleeve on the originally reserved L-shaped PVC pipe, connecting a PVC straight pipe, and covering a floor drain on an upper opening cover;

measure 202: when the post-cast strip is cast and collected, the post-cast strip is made into a circular arc shape, the middle position of the post-cast strip is lowered, and a slope is found to the position of the floor drain.

Preferably, the organized drainage measure in the terrace pouring stage comprises the following measures:

action 301: laying the groove part of the post-cast strip by adopting a gravel layer, and laying non-woven fabrics on the gravel layer;

step 302: pouring a reinforced concrete protective layer on the non-woven fabric broken stone cushion layer, if water seeps out to flow to the pre-buried pipe through the floor drain, then flowing into the water collecting well, and pumping out the basement through an automatic water pump in the water collecting well;

measure 303: before the basement garage terrace is poured, the straw ropes are firstly adopted to be longitudinally and transversely laid and led to the drainage ditch.

Preferably, the water stop sleeve comprises a housing and a metal sleeve.

Preferably, the shell comprises a threaded pipe, a central pipe and a switching pipe in sequence from top to bottom, and the inner diameters of the three pipes are the same; the metal sleeve comprises a metal pipe and metal wings, and the metal wings are fixed in the middle of the metal pipe in a welding mode.

Preferably, the threaded pipe, the central pipe and the adapter pipe are all made of PVC materials.

Preferably, the inner wall of the metal pipe is coated with a sealing glue and sleeved on the central pipe.

Preferably, the surface of the threaded pipe is provided with threads, and the threaded pipe is tightly connected with the PVC straight pipe in the post-cast strip sealing stage.

Preferably, the outer part of the lower end of the adapter tube is provided with 4 positioning holes at equal intervals along the circumferential direction; the top of the L-shaped PVC pipe reserved in the post-cast strip sealing stage is provided with 4 positioning holes corresponding to the adapter pipe, and the positioning holes of the two pipes are in one-to-one correspondence tight connection through screws.

Compared with the prior art, the invention has the following beneficial effects:

1. according to the basement post-cast strip process, in the post-cast strip reserving stage, the floor drain can be drained automatically through the cooperation of the PVC pipe, the water collecting well and the temporary water pump, the floor drain is convenient to clean, the efficiency is improved, and meanwhile the labor input can be reduced. In addition, the steel plate can prevent the water stop steel plate, the steel bar iron member and the like from being corroded by bubble water to form a rust layer to influence occlusion when pouring concrete, so that the water seepage risk is prevented.

2. According to the basement post-cast strip process, the post-cast strip is made into the arc shape when being poured and collected, so that a drainage ditch is formed, the basement is guaranteed to be dry, and the phenomenon that mud is formed by falling ash such as water, mortar and paint on the floor is avoided.

3. According to the basement post-pouring belt process provided by the invention, the gravel layer, the non-woven fabric and the reinforced concrete protective layer are overlaid and laid, so that the hidden dangers of secondary cracking, water seepage and the like of the structural layer of the basement caused by disturbance of external factors such as foundation disturbance, temperature difference, secondary decoration and the like can be effectively eliminated, and meanwhile, the drainage system automatically formed after the straw ropes laid longitudinally and transversely before the floor is poured are decayed ensures the dryness of the ground.

4. The water stop sleeve used in the basement post-cast strip process is simple in structure, convenient to install with a reserved pipeline and capable of improving installation efficiency. Meanwhile, the water stop sleeve protects the inner shell by arranging the metal sleeve, and the sealant is arranged between the metal sleeve and the shell, so that the tightness connection relation between the metal sleeve and the shell is enhanced, and the problem that the water stop sleeve is damaged due to extrusion caused by factors such as foundation sinking and the like is solved. The annular metal wings are arranged on the metal sleeve, so that the stability and the anti-skidding function of the position of the water stop sleeve in the post-pouring strip concrete pouring are improved, and the falling of the water stop sleeve due to the influence of factors such as external force is relieved.

Drawings

In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings needed to be used in the description of the embodiments or the prior art will be briefly introduced below, and it is obvious that the drawings in the following description are some embodiments of the present application, and it is obvious for those skilled in the art to obtain other drawings based on these drawings without creative efforts. Throughout the drawings, like elements or portions are generally identified by like reference numerals. In the drawings, elements or portions are not necessarily drawn to scale.

FIG. 1 is a schematic view of measures for a post-cast strip reservation stage in a basement post-cast strip process provided by the invention;

FIG. 2 is a schematic view of measures taken at a post-cast strip closing stage in a basement post-cast strip process provided by the invention;

FIG. 3 is a schematic view of a post-cast strip during the closing of the post-cast strip in the post-cast strip closing process of a basement;

FIG. 4 is a schematic view of an organized drainage measure at a terrace casting stage in a basement post-cast strip process according to the present invention;

FIG. 5 is a plan view of a basement at a terrace casting stage in a basement post-cast strip process according to the present invention;

FIG. 6 is a sectional view of the basement in plan view 1-1 at the floor pouring stage in the basement post-cast strip process according to the present invention;

FIG. 7 is a schematic structural view of a water stop sleeve used in the process;

FIG. 8 is a schematic structural view of a housing in a water stop sleeve used in the process;

FIG. 9 is a schematic structural view of a metal sleeve in a water stop sleeve used in the process;

in the figure: 1. an L-shaped PVC pipe; 2. a water collecting well; 3. a basement floor; 4. post-pouring steel bars; 5. a protective layer; 6. a floor drain cover; 7. a water stop sleeve; 701. a threaded pipe; 702. a central tube; 703. a transfer tube; 704. a metal tube; 705. a metal wing; 706. positioning holes; 8. a crushed stone layer; 9. non-woven fabrics; 10. an automatic water pump; 11. a straw rope; 12. a drainage ditch; 13. a rubber waterstop; 14. post-pouring micro-expansion concrete; 15. a steel plate waterstop; 16. a water stop sheet; 17. covering a post-pouring belt; 18. and (4) mortar.

Detailed Description

In order to make the objects, technical solutions and advantages of the embodiments of the present application clearer, the technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are some embodiments of the present application, but not all embodiments. In the following description, specific details such as specific configurations and components are provided only to help the embodiments of the present application be fully understood. Accordingly, it will be apparent to those skilled in the art that various changes and modifications may be made to the embodiments described herein without departing from the scope and spirit of the present application. In addition, descriptions of well-known functions and constructions are omitted in the embodiments for clarity and conciseness.

It should be appreciated that reference throughout this specification to "one embodiment" or "the embodiment" means that a particular feature, structure or characteristic described in connection with the embodiment is included in at least one embodiment of the present application. Thus, the appearances of the phrase "one embodiment" or "the present embodiment" in various places throughout this specification are not necessarily all referring to the same embodiment. Furthermore, the particular features, structures, or characteristics may be combined in any suitable manner in one or more embodiments.

Further, the present application may repeat reference numerals and/or letters in the various examples. This repetition is for the purpose of simplicity and clarity and does not in itself dictate a relationship between the various embodiments and/or configurations discussed.

The term "and/or" herein is merely an association describing an associated object, meaning that three relationships may exist, e.g., a and/or B, may mean: a exists alone, B exists alone, and A and B exist at the same time, and the term "/and" is used herein to describe another association object relationship, which means that two relationships may exist, for example, A/and B, may mean: a alone, and both a and B alone, and further, the character "/" in this document generally means that the former and latter associated objects are in an "or" relationship.

The term "at least one" herein is merely an association relationship describing an associated object, and means that there may be three relationships, for example, at least one of a and B, may mean: a exists alone, A and B exist simultaneously, and B exists alone.

It is further noted that, herein, relational terms such as first and second, and the like may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion.

Example 1

This embodiment introduces a post-cast strip reservation stage measure in the basement post-cast strip technology.

Referring to fig. 1, fig. 1 is a schematic view illustrating measures of a post-cast strip reservation stage in a basement post-cast strip process.

The measures of the post-cast strip reservation stage comprise the following measures:

measure 101: when the earthwork is excavated, an L-shaped PVC pipe 1 with the thickness of 75-100mm is pre-buried at the reserved position of a post-cast strip and is led to a nearby water collecting well 2;

step 102: the concrete pouring finish surface of the basement bottom plate 3 and the protective layer 5 with the post-cast steel bars 4 are enlarged as much as possible, and the protective layer 5 is more than 5 cm;

step 103: after the post-cast strip cushion layer is finished, the post-cast strip cushion layer is covered by a floor drain cover 6 and is higher than the cushion layer surface by more than 2cm, so that the pipe is prevented from being blocked by sundries such as slurry, and if the post-cast strip is provided with water, the water flows into the L-shaped PVC pipe 1 through the floor drain to the water collecting well 2, and then a temporary water pump is adopted for pumping and draining.

Further, a rubber water stop belt 13 is arranged at the center of the basement bottom plate 3 at the position of the post-pouring belt width, and polyvinyl chloride cement or hemp pitch is used for filling joints.

Further, a steel plate water stop belt 15 is arranged at the joint of the post-pouring micro-expansion concrete 14 and the basement bottom plate 3.

Further, a water stop sheet 16 is arranged at the joint of the L-shaped PVC pipe 1 and the water collecting well 2.

Furthermore, mortar 18 is arranged on two sides of the post-cast strip cover 17 for water retaining.

Further, the post-cast strip is left on for a period generally from the beginning of the foundation to one month after completion of the main body.

The technical scheme of this embodiment can realize the floor drain through above-mentioned measure and independently drain, and the clearance of being convenient for can also reduce artifical input when raising the efficiency. In addition, can also prevent bubble water corrosion such as stagnant water steel sheet, reinforcing bar iron member to the prevention infiltration risk.

Example 2

Based on the above embodiment 1, this embodiment introduces a post-cast strip sealing stage measure in the basement post-cast strip process.

Referring to fig. 2, fig. 2 is a schematic view illustrating a post-cast strip sealing step in a basement post-cast strip process according to the present invention; referring to fig. 3, fig. 3 is a schematic view of a late poured band during a closing stage of the late poured band in the late poured band process of the basement according to the present invention;

the post-cast strip sealing stage measures comprise the following measures:

measure 201: before the concrete of the post-cast strip is poured, sleeving a water stop sleeve 7 on the originally reserved L-shaped PVC pipe 1, connecting a PVC straight pipe, and covering a floor drain cover 6 on an upper opening cover;

measure 202: when the post-cast strip is poured and collected, the post-cast strip is made into a circular arc shape, the middle position of the post-cast strip is lowered as far as possible, and a slope is found to the position of the floor drain.

Further, the period from the post-cast strip sealing stage to the terrace pouring stage is from the post-cast strip sealing stage.

The technical scheme of this embodiment is based on embodiment 1 forms the escape canal through above-mentioned measure, has guaranteed the drying of basement, avoids appearing the terrace and receives the phenomenon that water, mortar paint etc. fall to the ground ash and form mud.

Example 3

Based on the

above embodiments

1 and 2, this embodiment introduces an organized drainage measure in the floor pouring stage in the basement post-cast strip process.

Referring to fig. 4, fig. 4 is a schematic view illustrating an organized drainage measure at a terrace pouring stage in a basement post-cast strip process according to the present invention; referring to fig. 5, fig. 5 is a plan view of a basement at a floor pouring stage in a basement post-pouring zone process according to the present invention; referring to fig. 6, fig. 6 is a sectional view of a basement in a floor pouring stage in a basement post-cast strip process, which is shown in fig. 1-1;

the organized drainage measures in the terrace pouring stage comprise the following measures:

action 301: the groove part of the post-pouring belt is paved by adopting a gravel layer 8, and then non-woven fabrics 9 are paved on the gravel layer 8;

step 302: pouring a reinforced concrete protective layer 5 on the non-woven fabric 9, if water seeps out and flows to the pre-buried pipe through the floor drain, then the water flows into the water collecting well 2, and the water is pumped out of the basement through an automatic water pump 10 in the water collecting well 2;

measure 303: before the terrace of the basement garage is poured, the straw ropes 11 of 1-1.5cm are firstly longitudinally and transversely paved and led to the drainage ditch 12, and after the straw ropes 11 are rotted, a drainage system is automatically formed, so that the dryness of the ground is ensured.

Furthermore, the period of organized drainage in the terrace pouring stage is after the basement terrace is poured.

The technical scheme of this embodiment is based on

embodiment

1 and 2 effectively get rid of the basement receive external factors disturbance such as foundation disturbance, difference in temperature, secondary fitment and the hidden danger such as structural layer secondary fracture, infiltration that leads to through above-mentioned measure, simultaneously, drainage system's formation has still guaranteed the drying on ground.

Example 4

Based on the above embodiment 2, the present embodiment introduces a composition structure and a connection relationship of the water stop sleeve 7.

Referring to fig. 7, fig. 7 is a schematic structural view of a water stop sleeve used in the present process; referring to fig. 8, fig. 8 is a schematic structural view of a housing in a water stop sleeve used in the present process; referring to fig. 9, fig. 9 is a schematic structural view of a metal sleeve in a water stop sleeve used in the present process.

The water-stopping sleeve 7 used in the process comprises a shell and a metal sleeve. The shell comprises a threaded pipe 701, a central pipe 702 and an adapter pipe 703, the inner diameters of the three pipes are the same, and the shell is I-shaped; the metal sleeve comprises a metal pipe 704 and metal wings 705, wherein the metal wings 705 are in the shape of a hollow disc, and the diameter of the inner circle of the metal wings is the same as that of the metal pipe 704.

The inner wall of the metal pipe 704 is coated with a sealing glue and sleeved on the central pipe 702, and the metal wings 705 are fixed in the middle of the metal pipe 704 in a welding mode and used for improving the stability of the water-stop sleeve after the post-pouring strip concrete is poured, so that the functions of further stability and skid resistance are achieved.

Furthermore, the surface of the threaded pipe 701 is provided with threads, and the threaded pipe is tightly connected with the PVC straight pipe in the post-cast strip sealing stage. Meanwhile, the sealing strip is sleeved at the joint of the outer walls of the two pipes, so that the water leakage phenomenon is further avoided.

Furthermore, positioning holes 706 are circumferentially and equidistantly arranged on the outer portion of the lower end of the adapter tube 703, and the number of the positioning holes is 4; the top of the L-shaped PVC pipe reserved in the post-cast strip sealing stage is provided with 4 positioning holes 706 corresponding to the adapter pipe 703, the positioning holes 706 of the two pipes are in one-to-one correspondence tight connection through screws, and meanwhile, a sealing ring is further arranged at the joint of the two pipes to avoid water leakage.

Further, the threaded pipe 701, the central pipe 702 and the adapter pipe 703 are all made of PVC materials, and a shell formed by the three pipes is manufactured by die sinking and injection molding in a factory.

The water stop sleeve that this embodiment provided has shell and metal sleeve to constitute, and its simple structure is convenient for install with the pipeline of reserving, improves the installation effectiveness. Meanwhile, the water stop sleeve protects the inner shell by arranging the metal sleeve, and the sealant is arranged between the metal sleeve and the shell, so that the tightness connection relation between the metal sleeve and the shell is enhanced, and the problem that the water stop sleeve is damaged due to extrusion caused by factors such as foundation sinking and the like is solved. The annular metal wings are arranged on the metal sleeve, so that the stability and the anti-skidding function of the position of the water stop sleeve in the post-pouring strip concrete pouring are improved, and the falling of the water stop sleeve due to the influence of factors such as external force is relieved.

While the invention has been described with respect to a preferred embodiment, it will be understood by those skilled in the art that the foregoing and other changes, omissions and deviations in the form and detail thereof may be made without departing from the scope of this invention. Those skilled in the art can make various changes, modifications and equivalent arrangements, which are equivalent to the embodiments of the present invention, without departing from the spirit and scope of the present invention, and which may be made by utilizing the techniques disclosed above; meanwhile, any changes, modifications and variations of the above-described embodiments, which are equivalent to those of the technical spirit of the present invention, are within the scope of the technical solution of the present invention.

Claims

1. A basement post-cast strip process is characterized in that: the method comprises the steps of post-cast strip reservation stage measures, wherein the post-cast strip reservation stage measures comprise the following measures:

measure 101: when earth is excavated, an L-shaped PVC pipe (1) is pre-buried at the reserved position of a post-cast strip and is communicated with a nearby water collecting well (2);

step 102: enlarging a concrete pouring finish surface of the basement bottom plate (3) and a protective layer (5) of a post-cast strip steel bar (4);

step 103: after the post-pouring belt cushion layer is finished, the ground cover (6) is used for covering.

2. The basement post-cast strip process according to claim 1, wherein the post-cast strip process comprises the following steps: also comprises a post-cast strip sealing stage measure and a terrace pouring stage organized drainage measure.

3. The basement post-cast strip process according to claim 2, wherein the post-cast strip process comprises the following steps: the post-cast strip sealing stage measures comprise the following measures:

measure 201: before the concrete of the post-cast strip is poured, a water stop sleeve (7) is sleeved on the originally reserved L-shaped PVC pipe (1), a PVC straight pipe is connected, and a floor drain cover (6) is arranged on the upper opening cover;

4. The basement post-cast strip process according to claim 2, wherein the post-cast strip process comprises the following steps: the organized drainage measures in the terrace pouring stage comprise the following measures:

action 301: the groove part of the post-pouring belt is paved by adopting a gravel layer (8), and then non-woven fabrics (9) are paved on the gravel layer (8);

step 302: pouring a reinforced concrete protective layer on the non-woven fabric (9), if water seeps out and flows to the pre-buried L-shaped PVC pipe (1) through the floor drain, then the water flows into the water collecting well (2), and the water is pumped out of the basement through an automatic water pump (10) in the water collecting well (2);

measure 303: before the terrace of the basement garage is poured, the straw ropes (11) are firstly paved longitudinally and transversely and led to the drainage ditch (12).

5. The basement post-cast strip process according to claim 3, wherein the post-cast strip process comprises the following steps: the water stop sleeve (7) comprises a shell and a metal sleeve.

6. The basement post-cast strip process according to claim 5, wherein the post-cast strip process comprises the following steps: the shell comprises a threaded pipe (701), a central pipe (702) and an adapter pipe (703) from top to bottom in sequence, and the inner diameters of the three pipes are the same; the metal sleeve comprises a metal pipe (704) and metal wings (705), wherein the metal wings (705) are fixed in the middle of the metal pipe (704) in a welding mode.

7. The basement post-cast strip process according to claim 6, wherein the post-cast strip process comprises the following steps: the threaded pipe (701), the central pipe (702) and the adapter pipe (703) are all made of PVC materials.

8. The basement post-cast strip process according to claim 6, wherein the post-cast strip process comprises the following steps: the inner wall of the metal pipe (704) is coated with a sealing glue and sleeved on the central pipe (702).

9. The basement post-cast strip process according to claim 7, wherein the post-cast strip process comprises the following steps: the surface of the threaded pipe (701) is provided with threads, and the threaded pipe is tightly connected with the PVC straight pipe in the post-cast strip sealing stage.

10. The basement post-cast strip process according to claim 7, wherein the post-cast strip process comprises the following steps: positioning holes (706) are circumferentially and equidistantly formed in the outer portion of the lower end of the adapter tube (703), and 4 positioning holes are formed; the top end of the L-shaped PVC pipe reserved in the post-cast strip sealing stage is provided with 4 positioning holes (706) corresponding to the adapter pipe (703), and the positioning holes (706) of the two pipes are tightly connected in a one-to-one correspondence mode through screws.