阅读说明：本技术 地下室底板的背水面防水结构及其施工方法 (Back water-proof structure of basement bottom plate and construction method thereof ) 是由 陈波 何平 黎金亮 钱德波 杭宏飞 程银行 王晓丽 于 2019-11-08 设计创作，主要内容包括：本发明涉及一种地下室底板的背水面防水结构的施工方法,包括如下步骤：施工地下室底板；提供疏水板,所述疏水板的下表面设有多个条形槽,将所述疏水板铺设于所述地下室底板之上,所述条形槽与所述地下室底板之间围合形成疏水空腔；以及于所述疏水板之上施工面层,从而完成了背水面防水结构的施工。本发明将地下室底板的防水设计到地下室底板的面层处,且改防水为疏水,将地下室底板之下涌上来的地下水通过疏水空腔进行疏导汇流,避免地下室上涌到地下室底板之上。本发明的施工方法,地下室底板可以直接浇筑,而无需等待防水卷材的施工,能够优化防水施工工序,减小施工难度,节约施工成本,降低防水工程施工危险性。(The invention relates to a construction method of a waterproof structure of a back water surface of a basement bottom plate, which comprises the following steps: constructing a basement bottom plate; providing a hydrophobic plate, wherein the lower surface of the hydrophobic plate is provided with a plurality of strip-shaped grooves, the hydrophobic plate is laid on the basement bottom plate, and a hydrophobic cavity is formed by the strip-shaped grooves and the basement bottom plate in a surrounding manner; and constructing a surface layer on the hydrophobic plate, thereby completing the construction of the waterproof structure of the back water surface. The basement bottom plate is designed to be waterproof on the surface layer of the basement bottom plate, the waterproof is changed into the hydrophobic, underground water which rushes up from the lower part of the basement bottom plate is dredged and converged through the hydrophobic cavity, and the basement is prevented from rushing up to the upper part of the basement bottom plate. According to the construction method, the basement bottom plate can be directly poured without waiting for the construction of the waterproof coiled material, the waterproof construction process can be optimized, the construction difficulty is reduced, the construction cost is saved, and the construction risk of the waterproof engineering is reduced.)

1. A construction method of a waterproof structure of a backwater surface of a basement bottom plate is characterized by comprising the following steps:

constructing a basement bottom plate;

providing a hydrophobic plate, wherein the lower surface of the hydrophobic plate is provided with a plurality of strip-shaped grooves, the hydrophobic plate is laid on the basement bottom plate, and a hydrophobic cavity is formed by the strip-shaped grooves and the basement bottom plate in a surrounding manner; and

and constructing a surface layer on the hydrophobic plate, thereby completing the construction of the waterproof structure of the back water surface.

2. The construction method of the waterproof structure of the backside surface of the basement according to claim 1, wherein after the basement bottom plate is constructed, the construction method further comprises:

and laying a waterproof layer on the basement bottom plate, and laying the hydrophobic plate on the waterproof layer when constructing the hydrophobic plate.

3. The construction method of the waterproof structure of the backside surface of the basement according to claim 1, wherein when the hydrophobic plate is constructed, the end of the hydrophobic cavity formed by the hydrophobic plate is tightly sealed by mortar;

and after the construction of the surface layer is finished, cutting off the dense mortar at the end part of the hydrophobic cavity to form a hydrophobic opening, and communicating the hydrophobic opening with a sump at the bottom plate of the basement.

4. The construction method of the waterproof structure of the backside surface of the basement according to claim 1, further comprising:

arranging a drainage blind ditch on the basement bottom plate, and communicating the drainage blind ditch with a water collecting pit at the basement bottom plate;

and a hydrophobic cavity formed by hydrophobic plates positioned at the periphery of the drainage underdrain is communicated with the drainage underdrain.

5. The construction method of the waterproof structure of the backside surface of the basement according to claim 1, further comprising:

cutting part of the surface layer to form a drainage open ditch on the surface layer, and communicating the drainage open ditch with a water collecting pit at the bottom plate of the basement;

when the open drain ditch is formed by cutting, the part of the hydrophobic plate positioned at the formed open drain ditch is also cut together, so that the hydrophobic cavity formed by the hydrophobic plate is communicated with the corresponding open drain ditch.

6. The utility model provides a surface of a back water waterproof construction of basement bottom plate, locates on the basement bottom plate, its characterized in that, surface of a back water waterproof construction includes:

the drainage plate is laid on the basement bottom plate, the lower surface of the drainage plate is provided with a plurality of strip-shaped grooves, and a drainage cavity is formed between each strip-shaped groove and the basement bottom plate in a surrounding manner; and

and pouring a surface layer formed on the hydrophobic plate.

7. The waterproof structure of the backside surface of the basement floor of claim 6, wherein a waterproof layer is further laid on the basement floor and between the hydrophobic plates.

8. The waterproof structure for the backside surface of the basement bottom plate as claimed in claim 6, wherein a water collecting pit is arranged at the basement bottom plate;

and a hydrophobic cavity formed by the hydrophobic plate is communicated with the water collecting pit.

9. The waterproof structure for the backside surface of the basement bottom plate as claimed in claim 6, wherein a water collecting pit is arranged at the basement bottom plate;

a drainage blind ditch communicated with the water collecting pit is arranged on the basement bottom plate;

and a hydrophobic cavity formed by hydrophobic plates positioned on the periphery of the drainage underdrain is communicated with the drainage underdrain.

10. The waterproof structure for the backside surface of the basement bottom plate as claimed in claim 6, wherein a water collecting pit is arranged at the basement bottom plate;

a drainage open channel is formed in the surface layer in a cutting mode, and the drainage open channel is communicated with the water collecting pit;

and the part of the hydrophobic plate positioned at the open drain ditch is cut so that the corresponding hydrophobic cavity is communicated with the open drain ditch.

Technical Field

The invention relates to the field of building waterproof construction engineering, in particular to a waterproof structure of a back water surface of a basement bottom plate and a construction method thereof.

Background

At present, waterproof engineering is taken as an indispensable part of various building engineering, and the quality of construction quality directly influences later-stage use of buildings. Generally, a flexible waterproof construction process on the upstream face is mainly adopted in the traditional construction process, waterproof coiled materials are paved after the bottom plate cushion layer construction is completed, then a waterproof protective layer is constructed, and then bottom plate structure concrete is constructed. Often in this kind of fast-paced work progress, the construction quality of waterproof engineering is difficult to obtain effectively to be guaranteed, and the time limit for a project can not satisfy relevant requirement, and the possibility of large tracts of land coiled material construction xylol poisoning can greatly increased simultaneously, and is great to other construction operation influences on every side.

Disclosure of Invention

The invention aims to overcome the defects of the prior art, provides a waterproof structure of a back water surface of a basement bottom plate and a construction method thereof, and solves the problems that the construction period cannot meet related requirements and the xylene poisoning risk of waterproof coiled material construction is high when waterproof coiled materials are fully paved under the prior bottom plate.

The technical scheme for realizing the purpose is as follows:

the invention provides a construction method of a waterproof structure of a back water surface of a basement bottom plate, which comprises the following steps:

constructing a basement bottom plate;

providing a hydrophobic plate, wherein the lower surface of the hydrophobic plate is provided with a plurality of strip-shaped grooves, the hydrophobic plate is laid on the basement bottom plate, and a hydrophobic cavity is formed by the strip-shaped grooves and the basement bottom plate in a surrounding manner; and

and constructing a surface layer on the hydrophobic plate, thereby completing the construction of the waterproof structure of the back water surface.

The basement bottom plate is designed to be waterproof on the surface layer of the basement bottom plate, the waterproof is changed into the hydrophobic, underground water which rushes up from the lower part of the basement bottom plate is dredged and converged through the hydrophobic cavity, and the basement is prevented from rushing up to the upper part of the basement bottom plate. According to the construction method, the basement bottom plate can be directly poured without waiting for the construction of the waterproof coiled material, after the basement bottom plate is poured, the construction of the hydrophobic plate and the surface layer on the basement bottom plate can be alternately carried out with other procedures (such as horizontal level construction), the waterproof construction procedure can be optimized, the construction difficulty is reduced, the construction cost is saved, and the construction risk of waterproof engineering is reduced.

The construction method of the waterproof structure on the back water surface of the basement is further improved in that after the basement bottom plate is constructed, the construction method further comprises the following steps:

and laying a waterproof layer on the basement bottom plate, and laying the hydrophobic plate on the waterproof layer when constructing the hydrophobic plate.

The construction method of the waterproof structure on the back surface of the basement is further improved in that when the hydrophobic plate is constructed, the end part of a hydrophobic cavity formed by the hydrophobic plate is tightly plugged by mortar;

and after the construction of the surface layer is finished, cutting off the dense mortar at the end part of the hydrophobic cavity to form a hydrophobic opening, and communicating the hydrophobic opening with a sump at the bottom plate of the basement.

The construction method of the waterproof structure on the back water surface of the basement is further improved in that the construction method further comprises the following steps:

arranging a drainage underdrain above the basement bottom plate, and communicating the drainage underdrain with a water collecting pit at the basement bottom plate;

and a hydrophobic cavity formed by hydrophobic plates positioned at the periphery of the drainage underdrain is communicated with the drainage underdrain.

The construction method of the waterproof structure on the back water surface of the basement is further improved in that the construction method further comprises the following steps:

cutting part of the surface layer to form a drainage open ditch on the surface layer, and communicating the drainage open ditch with a water collecting pit at the bottom plate of the basement;

when the open drain ditch is formed by cutting, the part of the hydrophobic plate positioned at the formed open drain ditch is also cut together, so that the hydrophobic cavity formed by the hydrophobic plate is communicated with the corresponding open drain ditch.

The invention also provides a backwater surface waterproof structure of the basement bottom plate, which is arranged on the basement bottom plate and comprises:

the drainage plate is laid on the basement bottom plate, the lower surface of the drainage plate is provided with a plurality of strip-shaped grooves, and a drainage cavity is formed between each strip-shaped groove and the basement bottom plate in a surrounding manner; and

and pouring a surface layer formed on the hydrophobic plate.

The waterproof structure of the back water surface of the basement bottom plate is further improved in that a waterproof layer is further paved between the basement bottom plate and the hydrophobic plate.

The waterproof structure of the back water surface of the basement bottom plate is further improved in that a water collecting pit is arranged at the basement bottom plate;

and a hydrophobic cavity formed by the hydrophobic plate is communicated with the water collecting pit.

The waterproof structure of the back water surface of the basement bottom plate is further improved in that a water collecting pit is arranged at the basement bottom plate;

a drainage blind ditch communicated with the water collecting pit is arranged on the basement bottom plate;

and a hydrophobic cavity formed by hydrophobic plates positioned on the periphery of the drainage underdrain is communicated with the drainage underdrain.

The waterproof structure of the back water surface of the basement bottom plate is further improved in that a water collecting pit is arranged at the basement bottom plate;

a drainage open channel is formed in the surface layer in a cutting mode, and the drainage open channel is communicated with the water collecting pit;

and the part of the hydrophobic plate positioned at the open drain ditch is cut so that the corresponding hydrophobic cavity is communicated with the open drain ditch.

Drawings

Fig. 1 is a sectional view of a waterproof structure of a backside surface of a basement bottom plate.

Fig. 2 to 4 are schematic structural diagrams illustrating the construction and decomposition steps of the hydrophobic plate and the surface layer in the waterproof structure of the back surface of the basement bottom plate.

Fig. 5 is a sectional view of the waterproof structure of the back surface of the basement bottom plate at the water collecting pit.

Fig. 6 is a cross-sectional view of the waterproof structure of the backside surface of the basement floor at the shear wall or frame column.

Fig. 7 is a cross-sectional view of the waterproof structure of the back surface of the basement bottom plate at the shear wall and forming a drainage open channel.

Fig. 8 is a sectional view of the waterproof structure of the back surface of the basement bottom plate at the open drain ditch.

Fig. 9 is a sectional view of the waterproof structure of the back surface of the basement bottom plate at the drainage underdrain.

Fig. 10 is a sectional view of the waterproof structure of the back surface of the basement bottom plate at the intercepting drain.

Detailed Description

The invention is further described with reference to the following figures and specific examples.

Referring to fig. 1, the invention provides a waterproof structure of a back surface of a basement bottom plate and a construction method thereof, the existing construction scheme of waterproof flexible materials of the back surface of the basement bottom plate is changed into the construction scheme of the waterproof flexible materials of the back surface rigid hydrophobic plate for carrying out hydrophobic function, and the waterproof layer is laid under the hydrophobic plate, so that a waterproof guarantee is added, a mode of combining waterproof and drainage is formed, and two waterproof lines can effectively ensure the waterproof quality of entity engineering. The construction method is not influenced by the surrounding construction environment, has strong general adaptability, can be inserted into the construction during the horizontal construction, effectively ensures the construction quality and saves the construction period of the project. The present invention relates to a waterproof structure of a basement bottom plate on a back water surface and a construction method thereof.

Referring to fig. 1, a cross-sectional view of the waterproof structure of the backside surface of the basement floor is shown. The waterproof structure of the back water surface of the basement bottom plate is explained with reference to fig. 1.

As shown in fig. 1, the waterproof structure of the basement bottom plate on the back surface of the basement bottom plate is arranged on the basement bottom plate 11, the waterproof structure of the back surface comprises a hydrophobic plate 21 and a surface layer 22, as shown in fig. 2 to 4, the lower surface of the hydrophobic plate 21 is provided with a plurality of strip-shaped grooves 211, a hydrophobic cavity 212 is formed between the strip-shaped grooves 211 and the basement bottom plate 11 in a surrounding manner, and the surface layer 22 is poured and formed on the hydrophobic plate 21.

Set up hydrophobic board 21 on basement bottom plate 11, and enclose between hydrophobic board 21 and the basement bottom plate 11 and close and form a plurality of hydrophobic cavity 212, utilize hydrophobic cavity 212 to dredge the groundwater that gushes on basement bottom plate 11 bottom, avoid on the groundwater gushes surface course 22, realize waterproof effect through the mode of drainage.

In one embodiment, a waterproof layer is laid on the basement floor 11 and between the hydrophobic plates 21. Utilize the waterproof layer to play waterproof function, increase a defence line, avoid surging the hydrophobic plate 21 department on the groundwater, if the waterproof inefficacy of waterproof layer, the groundwater of surging also can dredge the discharge through the hydrophobic cavity 212 that hydrophobic plate 21 department formed, set up twice defence lines, can effectively ensure waterproof quality.

Further, when the waterproof layer is laid, the height of the shear wall, the inner wall and the frame column is increased by 500mm, so that a fully-closed waterproof structure is formed on the upper surface of the basement bottom plate 11 to completely isolate upwelling of underground water.

Preferably, the waterproof layer is formed by coating a permeable crystalline waterproof material on the upper surface of the basement bottom plate 11, and the thickness of the waterproof layer is 1 mm.

In a specific embodiment, as shown in fig. 2, the cross section of the hydrophobic plate 21 is uneven, including the continuously arranged protrusions and grooves, the corresponding strip-shaped grooves are formed on the upper and lower surfaces of the hydrophobic plate 21 through the grooves, and the strip-shaped grooves on the upper and lower surfaces are arranged at intervals, in the example shown in fig. 2, the cross section of the strip-shaped groove 211 on the lower surface is trapezoidal, and the cross section of the strip-shaped groove on the upper surface is inverted trapezoidal. When two adjacent hydrophobic boards 21 splice mutually, insert the arch of a hydrophobic board 21 and locate in the recess that another hydrophobic board 21 corresponds, ensure the fastness of overlap joint department, with two projections and two corresponding groove looks lock on the lateral of hydrophobic board 21 to link together two hydrophobic boards 21. Preferably, the hydrophobic plate 21 is made of a plastic material, such as HDPE or PVC. The hydrophobic plate 21 formed in this way has certain rigidity and certain elasticity when in use, and when the pressure of upwelling groundwater is large, the hydrophobic plate 21 can be slightly deformed, so that the adjacent hydrophobic cavities 212 are communicated, and groundwater can be rapidly drained.

Further, as shown in fig. 3, after the hydrophobic plates 21 are laid and the adjacent hydrophobic plates 21 are connected, concrete is poured on the hydrophobic plates 21 to form the filling layer 24, the strip-shaped grooves on the upper surfaces of the hydrophobic plates 21 are filled with the poured concrete, and the stability of the hydrophobic plates 21 is improved by using the poured filling layer 24, so that the hydrophobic plates 21 do not move when the surface layer 22 is poured, and the quality of the hydrophobic cavities 212 formed by the hydrophobic plates 21 is improved. Preferably, the overall thickness of the hydrophobic plate 21 and the filling layer 24 is between 15mm and 20mm, and when the filling layer 24 is poured, a baffle is erected at the end of the hydrophobic plate 21, so that the filling layer 24 forms a certain thickness above the hydrophobic plate 21.

In one embodiment, as shown in fig. 5, a sump 111 is provided at the basement floor 11, and the hydrophobic cavity 212 formed by the hydrophobic plate 21 is communicated with the sump 111. In this way, the drainage plate 21 drains the inrush groundwater into the sump 111 through the drainage cavity 212, and then discharges the groundwater through the sump 111.

Specifically, when the hydrophobic plate 21 is laid, the opening of the hydrophobic cavity 212 on the hydrophobic plate 21 is arranged on the periphery of the sump 111, then mortar is used to close the opening at the end of the hydrophobic cavity 212 tightly, and after the surface layer 22 is constructed, the hydrophobic plate 21 with the cut part positioned on the periphery of the sump 111 is cut off to cut off the mortar for close sealing, so that the hydrophobic cavity 212 is communicated with the sump 111.

In one embodiment, as shown in fig. 6, after the end of the hydrophobic plate 21 around the shear wall 13 or the frame column is tightly sealed with mortar and the surface layer 22 is poured, a drainage open channel 113 is cut on the surface layer 22 as shown in fig. 7, the drainage open channel 113 is communicated with the sump 111, and water is transported into the sump 111 by the drainage open channel 113. When the open drain trench 113 is cut, a portion of the hydrophobic plate 21 located at the open drain trench 113 is cut so that the corresponding hydrophobic cavity 212 communicates with the open drain trench 113.

Referring to fig. 8, the open drain channel 113 is formed by cutting off a part of the surface layer 22, the open drain channel 113 disposed in the basement should be disposed along the root of the outer wall and the inner wall of the basement to avoid affecting the normal use of the bottom plate, the peripheral edge of the open drain channel 113 is communicated with the corresponding drain cavity 212, and when there is groundwater in the drain cavity 212, the groundwater can directly flow into the open drain channel 113, and then flow into the sump 111 through the open drain channel 113.

In one embodiment, as shown in fig. 9, a drainage ditch 112 is provided on the basement floor 11 and is communicated with the sump 111, the drainage ditch 112 is located under the surface layer 22 and is hidden in the structure, and the drainage cavity 212 formed by the drainage plate 21 around the drainage ditch 112 is communicated with the drainage ditch 112. The thus-flushed groundwater is drained into the drainage underdrain 112 via the drainage cavity 212, and then drained from the drainage underdrain 112 into the sump 111.

Specifically, the drainage underdrain 112 is formed by using channel steel, the end portions of two flange plates of the channel steel are cut into zigzag shapes, the zigzag openings are communicated with the drainage cavities 212 of the corresponding drainage plates 21, and then water in the drainage cavities 212 can enter the drainage underdrain 112. The end part of the hydrophobic plate 21 is attached to the flange plate of the corresponding channel steel, and then sealant is smeared at the top part where the end part of the hydrophobic plate 21 is butted with the flange plate, so that when the surface layer 22 is prevented from being poured subsequently, the concrete enters the butted part and blocks the hydrophobic cavity.

When the channel steel is laid, one end of the channel steel is communicated with the sump 111 to guide water into the sump 11, and the other end of the channel steel is blocked or communicated with the corresponding open drain 113.

As shown in fig. 10, the basement bottom plate 11 is provided with the intercepting drain 114, and the hydrophobic cavity 212 of the hydrophobic plate 21 at the intercepting drain 114 communicates with the intercepting drain 114 for discharging groundwater into the intercepting drain 114. Preferably, the intercepting drain 114 is formed in the basement bottom plate 11, and a waterproof layer is coated on the inner surface of the intercepting drain 114 to prevent the groundwater from returning upwards. Further, a grille rain grate is arranged on the top cover of the intercepting drain 114 and used for carrying water above the surface layer 22 into the intercepting drain 114. The catch basin 114 communicates with the sump 111, and discharges water into the sump 111.

Preferably, the surface layer 22 is made of 100mm thick C30 fine stone concrete which is smeared along with the island, a single-layer bidirectional reinforcing mesh phi [email protected] is arranged inside the surface layer, and a protective layer of carborundum and a curing agent is smeared on the surface of the surface layer 22.

The invention also provides a construction method of the waterproof structure of the back water surface of the basement bottom plate, and the construction method is explained below.

The construction method comprises the following steps:

as shown in fig. 1, a basement floor 11 is constructed;

as shown in fig. 2 to 4, a hydrophobic plate 21 is provided, a plurality of strip-shaped grooves 211 are formed in the lower surface of the hydrophobic plate 21, the hydrophobic plate 21 is laid on the basement floor 11, and a hydrophobic cavity 212 is formed between the strip-shaped grooves 211 and the basement floor 11;

and constructing a surface layer 22 on the hydrophobic plate 21, thereby completing the construction of the waterproof structure of the back water surface.

The basement bottom plate is designed to be waterproof on the surface layer of the basement bottom plate, the waterproof is changed into the hydrophobic, underground water which rushes up from the lower part of the basement bottom plate is dredged and converged through the hydrophobic cavity, and the basement is prevented from rushing up to the upper part of the basement bottom plate. According to the construction method, the basement bottom plate can be directly poured without waiting for the construction of the waterproof coiled material, after the basement bottom plate is poured, the construction of the hydrophobic plate and the surface layer on the basement bottom plate can be conducted alternately with other procedures, the waterproof construction procedure can be optimized, the construction difficulty is reduced, the construction cost is saved, and the construction risk of the waterproof project is reduced.

In a specific embodiment, after the construction of the basement bottom plate is completed, the method further comprises the following steps:

and laying a waterproof layer on the basement bottom plate, and laying the hydrophobic plate on the waterproof layer when constructing the hydrophobic plate. Utilize the waterproof layer to play waterproof function, increase a defence line, avoid surging the hydrophobic plate 21 department on the groundwater, if the waterproof inefficacy of waterproof layer, the groundwater of surging also can dredge the discharge through the hydrophobic cavity 212 that hydrophobic plate 21 department formed, set up twice defence lines, can effectively ensure waterproof quality.

Further, when the waterproof layer is laid, the height of the shear wall, the inner wall and the frame column is increased by 500mm, so that a fully-closed waterproof structure is formed on the upper surface of the basement bottom plate 11 to completely isolate upwelling of underground water. Preferably, the waterproof layer is formed by coating a permeable crystalline waterproof material on the upper surface of the basement bottom plate 11, and the thickness of the waterproof layer is 1 mm.

In one embodiment, as shown in fig. 2 and 3, adjacent hydrophobic sheets 21 are lap joined while laying the hydrophobic sheets 21. Specifically, the cross-section of hydrophobic board 21 is unevenness form, including the arch and the recess that set up in succession, is formed with corresponding bar groove through the recess at hydrophobic board 21's upper and lower surface, and the bar groove interval of upper and lower surface department sets up, and in the example shown in fig. 2, the cross-section of the bar groove 211 of lower surface is trapezoidal, and the cross-section of the bar groove of upper surface is the trapezoidal of falling. When two adjacent hydrophobic boards 21 splice mutually, insert the arch of a hydrophobic board 21 and locate in the recess that another hydrophobic board 21 corresponds, ensure the fastness of overlap joint department, with two projections and two corresponding groove looks lock on the lateral of hydrophobic board 21 to link together two hydrophobic boards 21. Preferably, the hydrophobic plate 21 is made of a plastic material, such as HDPE or PVC. The hydrophobic plate 21 formed in this way has certain rigidity and certain elasticity when in use, and when the pressure of upwelling groundwater is large, the hydrophobic plate 21 can be slightly deformed, so that the adjacent hydrophobic cavities 212 are communicated, and groundwater can be rapidly drained.

The filling layer 24 is formed by pouring concrete on the hydrophobic plate 21, and the stability of the hydrophobic plate 21 can be ensured by pressing the poured filling layer 24 against the hydrophobic plate 21.

In one embodiment, as shown in fig. 5, when the hydrophobic plate 21 is constructed, the end of the hydrophobic cavity formed by the hydrophobic plate 21 is sealed and compacted by mortar;

after the surface layer construction is finished, the dense mortar at the end part of the hydrophobic cavity is cut off to form a hydrophobic opening, and the hydrophobic opening is communicated with a water collecting pit 111 at the bottom plate of the basement.

In one embodiment, as shown in fig. 9, the method further includes:

arranging a drainage blind ditch 112 on the basement bottom plate 11, and communicating the drainage blind ditch 112 with a water collecting pit 111 at the basement bottom plate 11;

the hydrophobic cavity 121 formed by the hydrophobic plate 21 positioned at the periphery of the drainage underdrain 112 is communicated with the drainage underdrain 112.

In one embodiment, as shown in fig. 7 and 8, the method further includes:

cutting part of the surface layer 22 to form a drainage open ditch 113 on the surface layer 22, and communicating the drainage open ditch 113 with a sump 111 at the basement bottom plate 11;

when the open drain channels 113 are cut, the part of the hydrophobic plate 21 located at the formed open drain channels 113 is also cut so that the hydrophobic cavities 212 formed in the hydrophobic plate 21 communicate with the corresponding open drain channels 113.

The invention changes the waterproof flexible material construction scheme of the upstream surface into the rigid waterproof material scheme of the backside surface, and uses the seepage clean inner waterproof material to replace the waterproof construction outside the waterproof coiled material. Through the mode of preventing arranging and combining, increase the hydrophobic plate on the infiltration crystallization construction completion face for dredge rivers, form twice and prevent the line, effectively ensure entity engineering waterproof quality. The method is not influenced by the surrounding construction environment, has high universality, can be inserted into the construction during the horizontal construction, effectively ensures the construction quality and saves the construction period.

While the present invention has been described in detail and with reference to the embodiments thereof as illustrated in the accompanying drawings, it will be apparent to one skilled in the art that various changes and modifications can be made therein. Therefore, certain details of the embodiments are not to be interpreted as limiting, and the scope of the invention is to be determined by the appended claims.