阅读说明：本技术 一种暗挖地铁车站侧墙防水逆作缝的施工方法 (Construction method for waterproof reverse seam of side wall of underground excavated subway station ) 是由 李贺 李炳阳 张仲宇 张兴昕 陈建华 许飞飞 王海涛 杨文芳 于 2019-09-19 设计创作，主要内容包括：本发明提供了一种暗挖地铁车站侧墙防水逆作缝的施工方法,涉及地铁隧道施工技术领域,解决了现有技术中存在的侧墙与中板连接的逆作缝处防水效果较差,容易渗水的技术问题。该施工方法包括浇筑底板和带有阶梯结构的中板、在阶梯结构表面涂布嵌缝胶并固定注浆管、施作侧墙模板、浇筑侧墙、向逆作缝内灌注混凝土、拆除侧墙模板六个步骤。由于阶梯结构的存在以及逆作缝中填充有嵌缝胶和并灌注有混凝土,提高了逆作缝的防水效果。本发明用于提供一种能有效防止地下水通过逆作缝渗入地铁车站内的防水逆作缝施工方法。(The invention provides a construction method for a waterproof reverse seam of a side wall of an underground excavated subway station, relates to the technical field of subway tunnel construction, and solves the technical problems that in the prior art, the waterproof effect of the reverse seam where the side wall is connected with a middle plate is poor, and water seepage is easy. The construction method comprises the six steps of pouring a bottom plate and a middle plate with a step structure, coating caulking glue on the surface of the step structure, fixing a grouting pipe, constructing a side wall template, pouring a side wall, pouring concrete into a reverse construction joint, and dismantling the side wall template. Because the stepped structure exists and the reverse joint is filled with caulking glue and concrete, the waterproof effect of the reverse joint is improved. The waterproof reverse-acting seam construction method is used for effectively preventing underground water from permeating into a subway station through the reverse-acting seam.)

1. A construction method for secretly digging a waterproof reverse seam of a side wall of a subway station is characterized by comprising the following steps:

step A: pouring a middle plate and a bottom plate, wherein the lower edge chamfer part of the middle plate extends downwards, the joint part of the middle plate and the side wall is poured into a step structure, and the step positioned on the inner side is higher than the step positioned on the outer side;

and B: coating caulking glue on the surface of the stepped structure, and fixing a grouting pipe on the surface of the caulking glue;

and C: constructing a side wall template, wherein the side wall template is positioned between the middle plate and the bottom plate, a side wall pouring cavity is formed between the side wall template and an excavation surface, and a pumping concrete feeding port and a manual feeding port are formed in the side wall template;

step D: pouring concrete into the side wall pouring cavity from the pumping concrete feeding port and the manual feeding port until the stepped structure is formed to form a side wall, and forming a reverse seam at the joint of the side wall and the stepped structure;

step E: pouring concrete into the reverse construction joint through the grouting pipe;

step F: and (4) removing the side wall template, chiseling and polishing redundant concrete generated in the construction process.

2. The construction method of the underground excavation subway station side wall waterproof reverse seam as claimed in claim 1, wherein step B comprises the following steps:

step B1: performing chiseling treatment on the surface of the stepped structure to remove floating slurry and impurities;

step B2: coating caulking glue on the surface of the treated concrete along the direction of the full length of the reverse joint;

step B3: and after the caulking compound is formed, installing a grouting pipe on the surface of the caulking compound.

3. The construction method for the waterproof reverse seam of the side wall of the underground excavated subway station as claimed in claim 1, wherein step D comprises the following steps:

step D1: pouring concrete into the side wall pouring cavity from the pumping concrete feeding port;

step D2: when the height of the poured concrete reaches the position height of the pumping concrete feeding port, inserting a vibrating rod into the concrete from the pumping concrete feeding port for vibrating;

step D3: closing the pumping concrete feeding port after the vibration is finished;

step D4: pouring concrete into the side wall pouring cavity from the manual feeding port;

step D5: when the poured concrete is close to the lower surface of the stepped structure of the middle plate, a vibrating rod is extended into the concrete from the manual feeding port to vibrate;

step D6: and continuously pouring concrete into the side wall pouring cavity from the manual feeding port until the side wall pouring cavity is full of concrete.

4. The construction method of the underground excavation subway station side wall waterproof reverse seam as claimed in claim 1, wherein step F comprises the following steps:

step F1: after the concrete is finally set for 24 hours, removing the side wall template in the area around the artificial feeding port;

step F2: chiseling off redundant concrete around the reverse construction joint, and polishing the surface of the concrete;

step F3: removing the side wall templates at other parts;

step F4: and chiseling redundant concrete generated in the pouring process, and polishing the surface of the concrete.

5. The construction method of the underground excavation subway station side wall waterproof reverse seam as claimed in claim 1, wherein the side wall formwork comprises a formwork back rib and a shaping module; wherein the content of the first and second substances,

the mould comprises at least three mould back ribs arranged along the through length direction of a reverse seam, a sizing module is fixedly connected between every two adjacent mould back ribs, each sizing module is provided with one manual feeding port and one pumping concrete feeding port, and the pumping concrete feeding port is positioned below the manual feeding port.

6. The construction method for the waterproof reverse seam of the side wall of the underground excavated subway station as claimed in claim 5, wherein the shaped modules comprise a first shaped steel die and at least two second shaped steel dies; wherein the content of the first and second substances,

the first shaping steel die and the at least two second shaping steel dies are arranged along the height direction of the side wall; an artificial feeding port is formed in the first shaping steel die and is in a funnel shape; the second shaping steel die is arranged below the first shaping steel die, and one second shaping steel die is provided with a pumping concrete feeding port.

7. The construction method of the underground excavation subway station side wall waterproof reverse seam as claimed in claim 6, wherein after the installation of the side wall formwork is completed, a gap exists between the inner wall surface of the artificial feeding port and the edge of the stepped structure, the top of the artificial feeding port is higher than the stepped structure, and at least the outer surface of the second sizing steel die is flush with the inner surface of the middle plate.

8. The construction method of the underground excavation subway station side wall waterproof reverse seam as claimed in claim 1, wherein the grouting pipe is arranged along the full length direction of the reverse seam, and the grouting pipe is fixed on the center line of the ladder structure in the width direction through a fastener.

9. The construction method of the underground excavation subway station side wall waterproof reverse seam as claimed in claim 8, wherein the number of the fasteners is at least two, and the fasteners are arranged along the full length direction of the reverse seam; the distance between two adjacent fasteners is 20-60 cm.

10. The construction method of the waterproof reverse seam of the side wall of the underground excavated subway station as claimed in claim 1, wherein the thickness of the seam-filling glue after molding is 8 cm-10 cm.

Technical Field

The invention relates to the technical field of subway tunnel construction methods, in particular to a construction method for secretly digging a waterproof reverse seam of a side wall of a subway station.

Background

With the development of urban traffic, subways become an indispensable part of the urban traffic, various rail traffic lines of the subways are arranged in a staggered mode to cover every corner of a city, and rail traffic transfer stations undoubtedly become hubs of the various traffic lines. The hole-pile method is an important construction method for underground excavation of a subway station at present, and in the Chinese invention patent with the application publication number of CN 108005664A, the construction process of the underground double-layer underground excavation subway station is disclosed as follows: after preliminary bracing of the arch part is completed, downwards excavating to the position of a station middle plate, sequentially constructing a middle plate structure, a negative first-layer side wall and a second arch part lining, then downwards excavating to a designed elevation, constructing a bottom plate and pouring a negative second-layer structure side wall, and thus a longitudinally through reverse seam exists at the connecting part of the negative second-layer side wall and the poured middle plate.

The applicant finds that in the existing construction process of the side wall of the subway station by adopting a hidden excavated pile method, due to the fact that the side wall is poured from bottom to top, trace sinking may be generated under the action of gravity, gaps at the reverse construction seams are enlarged, and the waterproof effect is poor.

Disclosure of Invention

The invention aims to provide a construction method for a waterproof reverse joint of a side wall of an underground excavated subway station, and the construction method is used for solving the technical problems that the waterproof effect of the reverse joint where the side wall is connected with a middle plate is poor and water seepage is easy in the prior art. The technical effects that can be produced by the preferred technical scheme in the technical schemes of the invention are described in detail in the following.

In order to achieve the purpose, the invention provides the following technical scheme:

the invention provides a construction method for a waterproof reverse seam of a side wall of an underground excavated subway station, which comprises the following steps:

step A: pouring a middle plate and a bottom plate, wherein the lower edge chamfer part of the middle plate extends downwards, the joint part of the middle plate and the side wall is poured into a step structure, and the step positioned on the inner side is higher than the step positioned on the outer side;

and B: coating caulking glue on the surface of the stepped structure, and fixing a grouting pipe on the surface of the caulking glue;

and C: installing a side wall template, wherein the side wall template is positioned between the middle plate and the bottom plate, a side wall pouring cavity is formed between the side wall template and an excavation surface, and a pumping concrete feeding port and a manual feeding port are formed in the side wall template;

step D: pouring concrete into the side wall pouring cavity from the pumping concrete feeding port and the manual feeding port until the stepped structure is formed to form a side wall, and forming a reverse seam at the joint of the side wall and the stepped structure;

step E: pouring concrete into the reverse construction joint through the grouting pipe;

step F: and (4) removing the side wall template, chiseling and polishing redundant concrete generated in the construction process.

In a preferred or alternative embodiment, step B comprises the steps of:

step B1: performing chiseling treatment on the surface of the stepped structure to remove floating slurry and impurities;

step B2: coating caulking glue on the surface of the treated concrete along the direction of the full length of the reverse joint;

step B3: and after the caulking compound is formed, installing a grouting pipe on the surface of the caulking compound.

In a preferred or alternative embodiment, step D comprises the steps of:

step D1: pouring concrete into the side wall pouring cavity from the pumping concrete feeding port;

step D2: when the height of the poured concrete reaches the position height of the pumping concrete feeding port, inserting a vibrating rod into the concrete from the pumping concrete feeding port for vibrating;

step D3: closing the pumping concrete feeding port after the vibration is finished;

step D4: pouring concrete into the side wall pouring cavity from the manual feeding port;

step D5: when the poured concrete is close to the lower surface of the stepped structure of the middle plate, a vibrating rod is extended into the concrete from the manual feeding port to vibrate;

step D6: and continuously pouring concrete into the side wall pouring cavity from the manual feeding port until the side wall pouring cavity is full of concrete.

In a preferred or alternative embodiment, step F comprises the steps of:

step F1: after the concrete is finally set for 24 hours, removing the side wall template in the area around the artificial feeding port;

step F2: chiseling off redundant concrete around the reverse construction joint, and polishing the surface of the concrete;

step F3: removing the side wall templates at other parts;

step F4: and chiseling redundant concrete generated in the pouring process, and polishing the surface of the concrete.

In a preferred or optional embodiment, the side wall template comprises a template back rib and a shaping module; wherein the content of the first and second substances,

the mould comprises at least three mould back ribs arranged along the through length direction of a reverse seam, a sizing module is fixedly connected between every two adjacent mould back ribs, each sizing module is provided with one manual feeding port and one pumping concrete feeding port, and the pumping concrete feeding port is positioned below the manual feeding port.

In a preferred or alternative embodiment, the sizing module comprises a first sizing steel die and at least two second sizing steel dies; wherein the content of the first and second substances,

the first shaping steel die and the at least two second shaping steel dies are arranged along the height direction of the side wall; an artificial feeding port is formed in the first shaping steel die and is in a funnel shape; the second shaping steel die is arranged below the first shaping steel die, and one second shaping steel die is provided with a pumping concrete feeding port.

In a preferred or optional embodiment, after the installation of the side wall formwork is completed, a gap exists between the inner wall surface of the artificial feeding port and the edge of the stepped structure, the top of the artificial feeding port is higher than the stepped structure, and at least the outer surface of the second sizing steel die is flush with the inner surface of the middle plate.

In a preferred or alternative embodiment, the grouting pipe is arranged along the full length direction of the reverse seam, and the grouting pipe is fixed on the middle line of the stepped structure in the width direction through a fastener.

In a preferred or alternative embodiment, the number of the fasteners is at least two, and the fasteners are arranged along the full length direction of the reverse acting seam; the distance between two adjacent fasteners is 20-60 cm.

In a preferred or alternative embodiment, the thickness of the caulking compound after molding is 8 cm-10 cm.

Based on the technical scheme, the embodiment of the invention can at least produce the following technical effects:

the construction method of the waterproof reverse joint of the side wall of the underground excavated subway station, provided by the invention, comprises the steps of processing the joint part of the middle plate and the side wall into a step structure, coating caulking glue on the outer surface of the step structure on the middle plate, and pouring concrete into the formed reverse joint through the grouting pipe after the side wall is poured; because the formed reverse seam is in a step shape, and the step positioned on the inner side is higher than the step positioned on the outer side, the wall surface of the step positioned on the inner side effectively prevents the groundwater on the outer side from permeating into the inner side through the reverse seam; in addition, as the caulking glue is coated in the reverse-acting seam and the concrete is poured, the underground water at the outer side is further prevented from permeating into the inner side through the reverse-acting seam.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the drawings without creative efforts.

FIG. 1 is a schematic view of a waterproof reverse seam structure of a side wall of an underground excavated subway station provided in an embodiment of the present invention;

fig. 2 is a schematic structural diagram of a sidewall template provided in an embodiment of the present invention;

FIG. 3 is a schematic cross-sectional view of the first shaped steel form shown in FIG. 3;

fig. 4 is a schematic view of a fixing structure of the grout pipe shown in fig. 1.

In the figure, 1, middle plate; 2. a base plate; 3. caulking glue; 4. a grouting pipe; 41. a fastener; 411. a clamping part; 412. a fixed part; 5. a side wall template; 51. a template back rib; 52. a shaping module; 521. a manual feeding port; 522. pumping a concrete feeding port; 523. a first shaping steel die; 524. a second sizing steel die; 525. a feeding port cover; 6. excavating a surface; 7. a side wall; 8. inversely sewing; 9. and (5) pouring a cavity on the side wall.

Detailed Description

In order to make the objects, technical solutions and advantages of the present invention more apparent, the technical solutions of the present invention will be described in detail below. It is to be understood that the described embodiments are merely exemplary of the invention, and not restrictive of the full scope of the invention. All other embodiments, which can be derived by a person skilled in the art from the examples given herein without any inventive step, are within the scope of the present invention.

The invention provides a construction method for preventing a side wall of a subsurface excavated subway station from water-proof reverse-acting seams, which can prevent underground water from permeating into the subway station.

The technical solution provided by the present invention is explained in more detail with reference to fig. 1 to 4.

As shown in fig. 1 to 4, the construction method for the waterproof reverse seam of the side wall of the underground excavated subway station provided by the embodiment of the present invention includes the following steps:

step A: pouring the middle plate 1 and the bottom plate 2, wherein the lower edge chamfer part of the middle plate 1 extends downwards, the joint part of the middle plate and the side wall 7 is poured into a step structure, and the step positioned on the inner side is higher than the step positioned on the outer side;

and B: coating caulking glue 3 on the surface of the stepped structure, and fixing a grouting pipe 4 on the surface of the caulking glue 3;

and C: installing a side wall template 5, wherein the side wall template 5 is positioned between the middle plate 1 and the bottom plate 2, a side wall pouring cavity 9 is formed between the side wall template 5 and the excavation surface 6, and a pumping concrete feeding port 522 and a manual feeding port 521 are arranged on the side wall template 5;

step D: pouring concrete into the side wall pouring cavity from a pumping concrete feeding port 522 and a manual feeding port 521 to the step structure to form a side wall 7, and forming a reverse seam 8 at the joint of the side wall 7 and the step structure;

step E: concrete is poured into the reverse construction joint 8 through the grouting pipe 4;

step F: and (5) dismantling the side wall template 5, chiseling and polishing redundant concrete generated in the construction process.

Specifically, the middle plate 1 is formed by casting in the construction process, i.e., a mold at the lower part of the middle plate 1 is set to be in a step shape in the casting process, so that the lower part of the cast middle plate 1 is in the step shape. In addition, step E is typically repeated two to three times at intervals to make the grouting more compact.

The invention provides a construction method of a waterproof reverse joint of a side wall of an underground excavated subway station.A joint part of a middle plate 1 and the side wall 7 is processed into a step shape, caulking glue 3 is coated on the outer surface of a step structure on the middle plate 1, and concrete is poured into a reverse joint 8 formed through a grouting pipe 4 after the pouring of the side wall 7 is finished; because the formed reverse acting seam 8 is in a step shape, the step positioned at the inner side is higher than the step positioned at the outer side, and the underground water cannot flow upwards along the reverse acting seam 8 due to the self gravity of the underground water, the wall surface of the step positioned at the inner side effectively prevents the underground water at the outer side from permeating into the inner side through the reverse acting seam 8; in addition, because the caulking compound 3 is coated in the reverse joint 8 and the concrete is poured, the underground water on the outer side is further prevented from permeating into the inner side through the reverse joint 8.

As a preferred or alternative embodiment, it is characterized in that step B comprises the following steps:

step B1: performing chiseling treatment on the surface of the stepped structure to remove floating slurry and impurities;

step B2: coating caulking glue 3 on the surface of the treated concrete along the direction of the whole length of the reverse construction joint 8;

step B3: after the caulking compound 3 is formed, a grouting pipe 4 is arranged on the surface of the caulking compound 3.

Specifically, as shown in fig. 1, the caulking compound 3 is coated on the lower surface and the side surface of the whole stepped structure, the scabbling treatment is carried out on the surface of the stepped structure, a fresh and smooth concrete surface is exposed, the caulking compound 3 can be attached to the surface of the stepped structure more closely, and the waterproof effect is better.

As a preferred or alternative embodiment, step D comprises the steps of:

step D1: pouring concrete into a gap between the side wall template 5 and the excavation surface 6 from the pumping concrete feeding port 522;

step D2: when the height of the poured concrete reaches the height of the pumping concrete feeding port 522, inserting a vibrating rod into the concrete from the pumping concrete feeding port 522 for vibrating;

step D3: closing the pumping concrete feeding port 522 after the vibrating is finished;

step D4: pouring concrete into the side wall pouring cavity 9 from the manual feeding port 521;

step D5: when the poured concrete is close to the lower surface of the step structure of the middle plate 1, a vibrating rod is extended into the concrete from the manual feeding port 521 for vibrating;

step D6: concrete is continuously poured into the side wall pouring cavity 9 from the manual feeding port 521 until the side wall pouring cavity 9 is filled.

Specifically, the vibrating rod is stretched into the concrete for vibrating, so that air bubbles generated in the process of pouring the concrete can be discharged, and the phenomena of honeycomb pitted surface and the like of the concrete are eliminated; and the concrete can be compacted and combined more effectively by multiple times of vibration. The manual feeding port 521 is mainly used for pouring the part near the stepped structure, and the pumping concrete feeding port 522 is mainly used for pouring the main body of the side wall 7.

Specifically, since the shaping module 52 has a certain height, if concrete is poured inwards only through the manual feed opening 521, impact force is easily generated on the side wall template 5 in the process that the concrete falls from the high position, so that the side wall template 5 is deformed, and the construction effect is affected, the concrete can be filled to a certain height through the pumping concrete feed opening 522, and then the concrete is poured through the manual feed opening 521; a pumping concrete feeding port 522 is arranged below, concrete can be poured into the pumping concrete feeding port 522 through a pipeline by a concrete pump or a pump truck, and the construction efficiency is high; in addition, in order to further improve the construction efficiency, the pouring can also be carried out through the manual feeding port 521 and the pumping concrete feeding port 522 at the same time.

As a preferred or alternative embodiment, step F comprises the steps of:

step F1: after the concrete is finally set for 24 hours, removing the side wall template 5 in the area around the artificial feeding port 521;

step F2: chiseling off the redundant concrete around the reverse working seam 8, and polishing the surface of the concrete;

step F3: removing the side wall templates 5 at other parts;

step F4: and chiseling redundant concrete generated in the pouring process, and polishing the surface of the concrete.

Specifically, in general, the time interval between the step F2 and the step F3 is about 3 to 7 days, so as to ensure that the concrete of the side wall 7 is basically solidified, and the edge of the concrete cannot be damaged by removing the side wall formwork 5.

In a preferred or alternative embodiment, the side wall formwork 5 includes a formwork back rib 51 and a shaping module 52; wherein the content of the first and second substances,

at least three template back ribs 51 are arranged along the direction of the whole length of the reverse seam 8, a shaping module 52 is fixedly connected between every two adjacent template back ribs 51, each shaping module 52 is provided with an artificial feeding port 521 and a pumping concrete feeding port 522, and the pumping concrete feeding port 522 is positioned below the artificial feeding port 521.

As a preferred or alternative embodiment, the sizing module 52 includes a first sizing die 523 and at least two second sizing dies 524; wherein the content of the first and second substances,

the first shaping steel die 523 and the at least two second shaping steel dies 524 are arranged along the height direction of the side wall 7; an artificial feeding port 521 is arranged on the first shaping steel die 523, and the artificial feeding port 521 is in a funnel shape; the second shaping steel dies 524 are disposed below the first shaping steel die 523, and one of the second shaping steel dies 524 is provided with a pumping concrete feeding port 522.

As a preferred or alternative embodiment, after the installation of the side wall formwork 5 is completed, a gap exists between the inner wall surface of the artificial feeding port 521 and the edge of the stepped structure, the top of the artificial feeding port 521 is higher than the stepped structure, and the outer surface of at least the second shaped steel die 524 is flush with the inner surface of the middle plate 1.

Specifically, as shown in fig. 2-3, artificial feeding port 521 is the rectangular triangular prism shape of horizontal putting, the uncovered setting of its two right angle faces, one of them right angle face level sets up, be used for pouring the concrete, wherein stupefied and first design steel form 523 fixed connection in another right angle face limit, and there is the clearance its bottom and stair structure side, it makes the concrete flow into in the stair structure through this clearance to pour, first design steel form 523 also is uncovered setting in meeting the department with another right angle face, so can increase the flow area of concrete, improve the efficiency of construction, on the other hand can improve the volume that artificial feeding port 521 bore concrete, make its interior concrete increase to the pressure increase of stair structure department, it is better to fill the effect. In the construction process, concrete is manually poured into the manual feeding port 521 in batches according to actual conditions, so that the stepped structure can be filled with the concrete from low to high in sequence. In addition, removed in step F1 is a first shaped steel form 523, and removed in step F3 is a second shaped steel form 524.

In addition, the pumping concrete inlet 522 is a through hole arranged on the second shaped steel die 524, the second shaped steel die 524 is hinged with an inlet cover 525, the inlet cover 525 is arranged in the area near the pumping concrete inlet 522, and the inlet cover 525 and the pumping concrete inlet 522 can be covered on the pumping concrete inlet 522 in a matching way so as to close the pumping concrete inlet 522; the feeding port cover 525 is hinged with the second shaping steel die 524 through a hinge.

Specifically, as shown in fig. 1, after the installation of the side wall formwork 5 is completed, the artificial feeding port 521 is located in the outer side area of the stepped structure, the top of the artificial feeding port 521 is higher than the stepped structure, concrete can flow into the stepped structure through a gap between the inner wall surface of the artificial feeding port 521 and the inner wall surface of the middle plate 1, and the concrete is continuously poured until the artificial feeding port 521 is filled with the concrete, and the concrete filled in the screenshot structure can be compacted under the action of gravity of the concrete in the artificial feeding port 521; the outer surface of the second shaping steel die 524 is flush with the inner surface of the middle plate 1, so that the wall surface of the side wall 7 after pouring is flush with the wall surface of the middle plate 1, and the constructed wall is smoother. In addition, the side wall formwork 5 can be fixed by diagonal pulling through the steel bars, and the fixing mode is the same as that of the formwork in the prior art, and is not repeated herein.

In a preferred or alternative embodiment, the grouting pipe 4 is arranged along the entire length of the reverse seam 8, and the grouting pipe 4 is fixed to the center line of the stepped structure in the width direction by a fastener 41. The poured concrete can be filled in the reverse acting seam 8 more uniformly.

As a preferred or alternative embodiment, the number of fastening elements 41 is at least two, arranged along the entire length of the reverse seam 8; the distance between two adjacent fasteners 41 is 20 cm-60 cm.

Specifically, the fastener 41 includes a clamping portion 411 and a fixing portion 412, the clamping portion 411 is sleeved outside the grouting pipe 4, the fixing portion 412 is disposed on two sides of the clamping portion 411, a mounting hole is disposed on the fixing portion 412, and a screw is screwed into the middle plate 1 after passing through the mounting hole to fix the grouting pipe 4 on the lower surface of the stepped structure. The distance between two adjacent fasteners 41 is preferably 40 mm-50 mm, and sometimes the distance can be encrypted to 20 mm-30 mm according to actual conditions, so that the fixation is firmer, and the grouting pipe 4 is prevented from falling off by the individual fasteners 41 in the pouring process of the side wall 7 so as to influence the grouting effect.

In a preferred or alternative embodiment, the caulk 3 has a thickness dimension of 8cm to 10cm after molding.

Specifically, the caulking compound 3 is uniformly and continuously applied, so that the phenomenon of layer formation or falling off is avoided, and the waterproof effect is not influenced.

Any embodiment disclosed herein above is meant to disclose, unless otherwise indicated, all numerical ranges disclosed as being preferred, and any person skilled in the art would understand that: the preferred ranges are merely those values which are obvious or representative of the technical effect which can be achieved. Since the numerical values are too numerous to be exhaustive, some of the numerical values are disclosed in the present invention to illustrate the technical solutions of the present invention, and the above-mentioned numerical values should not be construed as limiting the scope of the present invention.

If the terms "first," "second," etc. are used herein to define parts, those skilled in the art will recognize that: the terms "first" and "second" are used merely to distinguish one element from another in a descriptive sense and are not intended to have a special meaning unless otherwise stated.

Meanwhile, if the invention as described above discloses or relates to parts or structural members fixedly connected to each other, the fixedly connected parts can be understood as follows, unless otherwise stated: a detachable fixed connection (for example using bolts or screws) is also understood as: non-detachable fixed connection (such as riveting and welding), of course, the mutual fixed connection can also be an integral structure (for example, the mutual fixed connection is manufactured by casting and integral forming instead (except that the integral forming process can not be adopted obviously).

In addition, terms used in any technical solutions disclosed in the present invention to indicate positional relationships or shapes include approximate, similar or approximate states or shapes unless otherwise stated. Any part provided by the invention can be assembled by a plurality of independent components or can be manufactured by an integral forming process.

Finally, it should be noted that: the above examples are only intended to illustrate the technical solution of the present invention and not to limit it; although the present invention has been described in detail with reference to preferred embodiments, those skilled in the art will understand that: modifications to the specific embodiments of the invention or equivalent substitutions for parts of the technical features may be made; without departing from the spirit of the present invention, it is intended to cover all aspects of the invention as defined by the appended claims.