CN111379308B

CN111379308B - Building basement top roof drainage french drain structure

Info

Publication number: CN111379308B
Application number: CN202010218450.3A
Authority: CN
Inventors: 王志宏; 杨衡; 徐露露
Original assignee: Guangdong Modern Architectural Design And Consulting Co ltd
Current assignee: Guangdong Modern Architectural Design And Consulting Co ltd
Priority date: 2020-03-25
Filing date: 2020-03-25
Publication date: 2021-01-08
Anticipated expiration: 2040-03-25
Also published as: CN111379308A

Abstract

The invention relates to the technical field of top drainage structures of a basement, in particular to a top plate drainage blind ditch structure of a building basement, which comprises a top plate, wherein a waterproof layer is arranged on the top plate, a plurality of drainage blind ditches are arranged on the waterproof layer at intervals, a gravel layer is arranged in front of the drainage blind ditches, a planting soil layer is arranged on the upper side of the gravel layer, each drainage blind ditch comprises two vertically arranged baffles and a concrete cover plate arranged on the upper side, drainage through holes opposite to the gravel layer are formed in the baffles, and a drainage assembly is arranged in each drainage blind ditch. The invention has the following effects: the gap required by drainage exists before the gravel, so that the supporting strength can be kept while the drainage function is kept, the drainage gap can be kept when the soil is returned, and a better rainwater drainage effect can be kept.

Description

Building basement top roof drainage french drain structure

Technical Field

The invention relates to the technical field of drainage structures at the top of a ground warehouse, in particular to a drainage blind ditch structure for a top plate at the top of a building ground warehouse.

Background

Along with the development of society, people's standard of living constantly improves, and the domestic car increases rapidly, and for solving the difficult problem of parkking, underground garage generally establishes, simultaneously, in order to improve people's living environment, mostly adopt the planting roof of horizontal plane and plant the plant above the underground garage, and under the condition that the rainfall is many, underground garage monomer roof area is big, the rainwater drainage on the planting roof is not smooth, still can infiltrate down to the ground storehouse after the rainwater persists.

Therefore, the drainage problem that the roof was planted on the plane was solved to the mode that the builder often adopted to look for the slope in the architectural structure design, overcome the rotten root of plant's phenomenon, the chinese utility model patent of the publication number CN205171643U of granting discloses a basement roof drainage system, including the green vegetable layer that sets gradually, plant the soil layer, the filter layer, hold the drainage blanket, hinder the root layer, roof basic unit, hinder and be equipped with one between root layer and the roof basic unit and look for slope layer and a screed-coat, the screed-coat is around looking for the slope layer outer lane and being in the edge of roof basic unit, roof basic unit's surface is equipped with a plurality of catch ditches, roof basic unit's side is equipped with the outer delivery port that arranges with the screed-coat intercommunication, outer row of delivery port and catch ditch. According to the drainage system, the plurality of water collecting ditches are arranged on the surface of the top plate base layer, rainwater permeates and flows into the water collecting ditches and is guided to the drainage water outlet through the water collecting ditches, and the drainage system is environment-friendly, durable and clean.

The above prior art solutions have the following drawbacks: because the area of holistic underground garage top surface is super large, the drain bar is generally with material simple, when backfilling planting soil construction, can't give effective protection, is squashed crushingly very easily, and in case the backfill soil is whole stifled dead with the drainage clearance on the drain bar, will lose drainage space, leads to ground storehouse top ponding.

Disclosure of Invention

Aiming at the defects in the prior art, the invention aims to provide a drainage blind ditch structure of a top plate of a building basement, which can guide rainwater into the drainage blind ditch through a gravel layer and can keep a good rainwater drainage effect.

The technical purpose of the invention is realized by the following technical scheme: the utility model provides a building basement top roof drainage french drain structure, includes the roof, be equipped with the waterproof layer on the roof, the interval is provided with a plurality of drainage french drains on the waterproof layer, and is a plurality of be provided with the metalling before the drainage french drain, the metalling upside is equipped with the planting soil layer, the drainage french drain includes two baffles of vertical setting and sets up the concrete apron at the upside, set up the drainage through-hole relative with the metalling on the baffle, be provided with down water component in the drainage french drain.

Through adopting above-mentioned technical scheme, when the rainwater flowed down from planting the soil layer, will flow to the metalling in, the rainwater will flow through the clearance between the rubble this moment, will enter into the drainage french drain through the drainage through hole, collect the rainwater in the drainage french drain and will discharge through lower water component, because the support intensity of rubble is far greater than the drain bar, and there is the required clearance of drainage before the rubble, so can be when keeping the function of drainage, also can keep support intensity, also can keep the existence in drainage clearance when returning the soil, can keep better rainwater drainage effect.

The present invention in a preferred example may be further configured to: the gravel layer is internally provided with a blind pipe with holes, the blind pipe with the holes is vertical to the length direction of the drainage blind ditch, one end of the blind pipe with the holes is inserted into the drainage through hole, and the aperture of the blind pipe with the holes is smaller than the particle size of the gravel layer.

Through adopting above-mentioned technical scheme, because be hollow structure in the foraminiferous blind pipe, the rainwater will be followed between the rubble through the hole admission pipe on the blind pipe in to aperture on the foraminiferous blind pipe is less than the diameter of rubble, and the rubble can not be along with in the rainwater admission pipe, and can be with the water in the roof of large tracts of land more fast admission pipe in, and can accelerate the drainage.

The present invention in a preferred example may be further configured to: the blind pipe comprises a blind pipe body and is characterized in that a concrete protective layer is arranged on the lower side of the blind pipe body, the upper side of the concrete protective layer is arc-shaped and matched with the blind pipe body, and holes on the lower side of the blind pipe body are plugged.

Through adopting above-mentioned technical scheme, foraminiferous blind pipe downside will be wrapped up by the concrete protective layer for its hole shutoff makes foraminiferous blind pipe downside have one section space that can store water then, is convenient for its drainage.

The present invention in a preferred example may be further configured to: the thickness of the gravel layer is larger than the diameter of the drainage through hole and lower than the height of the concrete cover plate.

Through adopting above-mentioned technical scheme, the rubble layer can keep the function of drainage, only needs to be bigger just than the drainage through-hole, does not need too much rubble layer, can make to have the planting soil layer of sufficient thickness to play better supporting role.

The present invention in a preferred example may be further configured to: the lower water component comprises a rainwater pipe arranged in the top plate in a penetrating mode, a rainwater port arranged at the top of the rainwater pipe and located in the drainage blind ditch, and a drainage pipe connected to the lower end of the rainwater pipe in a detachable mode, and the rainwater port is arranged in a lifting mode.

Through adopting above-mentioned technical scheme, the rainwater in the drainage french drain will loop through downspout and drain pipe discharge through the inlet for stom water, and because the rainwater drainage in the metalling is very fast, probably leads to the moisture in the planting soil layer not enough, and the plant has the possibility of dying, can dismantle the drain pipe and highly adjust the inlet for stom water to make the rainwater in the drainage french drain highly improve or reduce, be fit for the rainwater condition in different seasons.

The present invention in a preferred example may be further configured to: the inner wall at the top of the rainwater pipe is provided with a corrugated expansion pipe, the upper end of the corrugated expansion pipe is fixedly connected with the rainwater inlet, the lower water outlet of the rainwater inlet is fixedly connected with an adjusting pipe penetrating through the corrugated expansion pipe, and the lower end of the adjusting pipe is clamped with the inner wall of the rainwater pipe.

Through adopting above-mentioned technical scheme, through making the regulating pipe up-and-down motion in the downspout to cooperate with the rainwater pipe inner wall joint, thereby drive the inlet for stom water slip, flexible pipe of ripple can keep sealed along with the motion of downspout this moment, thereby play the effect of regulation.

The present invention in a preferred example may be further configured to: can dismantle in the rainwater pipe and be connected with fender mud spare, fender mud spare includes connecting portion and the hydrophobic portion of being connected with the rainwater pipe, fender mud spare wholly is thin wall hollow structure, and its downside is the opening setting, connecting portion are cylindricly, hydrophobic portion an organic whole sets up at the connecting portion upside, just the big or small top-down of diameter of hydrophobic portion increases gradually, a plurality of hydrophobic holes have been seted up on hydrophobic portion upper portion.

The rainwater falls from the top, and after permeating planting soil layer, when flowing to the drainage french drain, will be mingled with not few earth, and because the water that the top drainage was collected needs recycle, the rainwater that is mingled with earth is unable direct utilization. Through adopting above-mentioned technical scheme, when the rainwater was downflow through the inlet for stom water, will flow earlier to hydrophobic portion on, the rainwater continues the downflow through hydrophobic hole, and when mud, will deposit in the bottom of hydrophobic portion, and hydrophobic hole of hydrophobic portion upper end can continue the drainage, when earth is too much, can take off fender mud spare, clears up it, reduces the volume that earth was together retrieved.

The present invention in a preferred example may be further configured to: be provided with in the downspout and be used for contradicting the spacing bulge loop of connecting portion upside, just be located on the downspout inner wall spacing bulge loop downside is equipped with the joint bulge loop, the internal diameter of spacing bulge loop is less than the external diameter of connecting portion, the internal diameter of joint bulge loop equals the external diameter of connecting portion, it is connected with the jack catch that is used for contradicting on the joint bulge loop to slide on the connecting portion, be provided with on the connecting portion and be used for ordering about the driving piece of jack catch motion.

Through adopting above-mentioned technical scheme, when the installation keeps off the mud piece, contradict connecting portion at spacing bulge loop downside to joint bulge loop and the contact of connecting portion outer wall, accessible driving piece make the jack catch slide the back, support tightly at joint bulge loop upside, thereby make to keep off the mud piece and can be injectd between spacing bulge loop and joint bulge loop.

The present invention in a preferred example may be further configured to: offer the groove that slides that supplies the jack catch to slide on the inner wall of connecting portion, the direction of offering in groove that slides sets up downwards to one side, the jack catch is close to the one end of joint bulge loop and sets up for the button head, and this end embedding to connecting portion back, the surface of connecting portion flushes, the driving piece is the driving tube with connecting portion inner wall threaded connection.

Through adopting above-mentioned technical scheme, after the driving tube rotates, will contradict on the surface of jack catch, because the jack catch slope sets up, the driving tube will conflict rather than, thereby make the jack catch slide to one side down, then support tightly at joint bulge loop upside, form fixed effect, and when needs take off, make the driving tube rotate to the downstream, with connecting portion downstream back, the button head one end and the joint bulge loop contact back of jack catch, the jack catch will retract, thereby be convenient for keep off mud spare and take out.

The present invention in a preferred example may be further configured to: the limiting convex ring is characterized in that a guide part is arranged on the lower side of the limiting convex ring, the diameter of the guide part is gradually reduced from bottom to top, and the edge with the minimum diameter of the guide part is the same as the outer diameter of the connecting part.

Through adopting above-mentioned technical scheme, when fender mud spare inlays, the upper end of connecting portion will be contradicted on guide portion, will make after lasting the top, fender mud spare is located the downspout central point and puts, and can guarantee that the jack catch is when stretching out, can comparatively stably fix fender mud spare.

In summary, the invention includes at least one of the following beneficial technical effects:

1. the originally used drainage plate is cancelled, the gravel layer is arranged on the lower side of the planting soil layer, the support effect of the gravel layer is utilized, the drainage gap between the gravels can be kept, the downward seeped rainwater can flow into the drainage blind ditch, and the rainwater flows downwards through the drainage assembly, so that the better rainwater drainage effect can be kept;

2. the perforated blind pipe is added in the crushed stone layer, so that rainwater on the top of the bottom can be quickly guided into the drainage blind ditch, and the drainage speed is accelerated;

3. the height of the rainwater inlet can be changed through the adjusting pipe, the corrugated expansion pipe can move along with the rainwater inlet, and when the height of the rainwater inlet is changed, the height of rainwater in the drainage blind ditch can be controlled, so that the water content in the planting soil layer is controlled;

4. can dismantle at the downspout and be connected with behind the fender mud spare, will make the earth that mix with in the infiltration down store up on hydrophobic portion to reduce earth along with the direct exhaust possibility of rainwater, improve the purity after the rainwater is retrieved.

Drawings

FIG. 1 is a schematic structural view of the present invention;

FIG. 2 is an exploded schematic view after hiding the planting soil layer for showing the perforated blind pipe;

FIG. 3 is a partial cross-sectional view showing the launch assembly;

fig. 4 is a sectional view of the rain water pipe for showing an internal structure;

FIG. 5 is a schematic diagram of a latch;

FIG. 6 is a cross-sectional view of the fender;

fig. 7 is a schematic view showing the connection relationship between the claws and the connecting portion.

Reference numerals: 100. a top plate; 110. a waterproof layer; 111. fine stone concrete; 120. a drainage blind ditch; 121. a crushed stone layer; 122. planting a soil layer; 123. a baffle plate; 124. a concrete cover plate; 125. a drain through hole; 126. a blind pipe with a hole; 127. a concrete protective layer; 128. protecting the non-woven fabric; 130. a launching assembly; 131. a rain pipe; 132. a gutter inlet; 133. a drain pipe; 134. a threaded pipe; 135. a corrugated expansion pipe; 136. an adjusting tube; 140. a limit snap ring; 141. a clamping block; 142. a chute; 143. clamping a plate; 144. a deflector rod; 145. a slideway; 146. a spring; 150. a mud guard; 151. a connecting portion; 152. a hydrophobic portion; 153. a hydrophobic pore; 154. a limit convex ring; 155. a guide section; 156. clamping the convex ring; 160. a claw; 161. a sliding groove; 162. a drive tube; 163. a protrusion; 164. and (4) a groove.

Detailed Description

The present invention will be described in further detail with reference to the accompanying drawings.

The utility model provides a building basement top roof drainage french drain structure, refers to figure 1, includes roof 100, is equipped with waterproof layer 110 on the roof 100, and waterproof layer 110 is 1.5mm thick non-curing rubber pitch waterproof coating, still can lay the one deck non-woven fabrics on the waterproof layer 110 earlier, then pours 40mm thick pea gravel concretes 111. A plurality of blind drainage ditches 120 are arranged at intervals, and a gravel layer 121 is arranged in front of the blind drainage ditches 120.

Referring to fig. 2 and 3, a planting soil layer 122 is laid on the upper side of the gravel layer 121, and the planting soil layer 122 covers the gravel layer 121 and the blind drainage ditch 120. The drain blind ditch 120 comprises two baffle plates 123 arranged vertically and a concrete cover plate 124 arranged on the upper side, wherein the concrete cover plate 124 is connected with the baffle plates 123 through cement. And the baffle 123 is provided with a drainage through hole 125 opposite to the rubble layer 121, and a drainage blind ditch 120 is internally provided with a drainage assembly 130. Under the premise that the gravel layer 121 can keep the function of drainage, the gravel layer 121 only needs to be larger than the drainage through holes 125, excessive gravel layers 121 are not needed, and the sufficiently thick planting soil layer 122 can play a better supporting role, so that the thickness of the gravel layer 121 is larger than the diameter of the drainage through holes 125 and is lower than the height of the concrete cover plate 124.

In order to quickly discharge water at the top of the reservoir, a perforated blind pipe 126 is laid in the gravel layer 121, the aperture size of the perforated blind pipe 126 is 10mm, and the particle size of the gravel in the gravel layer 121 is 40-60mm, so that the gravel cannot enter the perforated blind pipe 126. Meanwhile, in order to reduce the mud inlet amount, a layer of protective non-woven fabric 128 can be wrapped outside the perforated blind pipe 126. And the size of the drainage through hole 125 on the baffle 123 is matched with that of the perforated blind pipe 126, one end of the perforated blind pipe 126 is embedded into the drainage through hole 125, so that rainwater absorbed in the gravel layer 121 is guided into the drainage blind ditch 120 through the perforated blind pipe 126. In addition, in order to protect the perforated blind pipe 126, a concrete protective layer 127 is poured on the lower side of the perforated blind pipe 126, the upper side of the concrete protective layer 127 is in a circular arc shape matched with the perforated blind pipe 126, a hole in the lower side of the perforated blind pipe 126 can be plugged, and a certain water storage space can be formed in the lower side of the perforated blind pipe 126.

Referring to fig. 4, the sewage assembly 130 includes a rainwater pipe 131 penetrating the top plate 100, a rainwater port 132 disposed at the top of the rainwater pipe 131 and located in the drainage blind ditch 120, and a drainage pipe 133 detachably connected to the lower end of the rainwater pipe 131, wherein the drainage pipe 133 and the rainwater pipe 131 are connected by a threaded pipe 134, and a certain sealing measure is provided, so that the rainwater pipe 131 can be opened after the threaded pipe 134 is detached. The gutter inlet 132 is provided to be elevated in order to adjust a drainage water level in the drain blind ditch 120. The rain pipe 131 is put in when the roof panel 100 is poured, and a corrugated expansion pipe 135 is arranged on the inner wall of the top of the rain pipe 131, one end of the corrugated expansion pipe 135 is fixedly connected with the inner wall of the rain pipe 131, and the other end is fixedly connected with the rain opening 132. Meanwhile, the gutter inlet of the gutter inlet 132 is fixedly connected with an adjusting pipe 136 passing through the bellows 135.

Referring to fig. 4 and 5, the lower end of the adjusting pipe 136 is clamped with the inner wall of the rainwater pipe 131, the inner wall of the rainwater pipe 131 is provided with a plurality of limiting snap rings 140, two clamping blocks 141 are symmetrically arranged on the circumferential side wall of the lower end of the adjusting pipe 136, a sliding groove 142 is formed in each clamping block 141, a clamping plate 143 embedded between the two limiting snap rings 140 slides in each sliding groove 142, a spring 146 is arranged in front of each clamping plate 143 and each sliding groove 142, a shift lever 144 is arranged on the lower side of each clamping block 141, and a sliding way 145 for the shift lever 144 to slide is formed in each clamping. In the use, order about cardboard 143 through driving lever 144 and slide to make cardboard 143 break away from between the spacing snap ring 140, thereby can make the adjusting pipe 136 slide from top to bottom, will drive the flexible pipe 135 of ripple and stretch, imbed cardboard 143 again to between the spacing snap ring 140 in addition, thereby adjust the height of inlet for stom water 132.

Referring to fig. 5 and 6, in order to receive soil in the process of launching water, a mud guard 150 is detachably connected to the rainwater pipe 131, the mud guard 150 includes a connecting portion 151 connected to the rainwater pipe 131 and a water drainage portion 152, and the mud guard 150 is integrally formed in a thin-walled hollow structure and has an opening at a lower side thereof. Connecting portion 151 is cylindricly, and integrative the setting in connecting portion 151 upside of hydrophobic portion 152, and the diameter size top-down of hydrophobic portion 152 crescent, and a plurality of hydrophobic holes 153 have been seted up on hydrophobic portion 152 upper portion. The recovered rainwater will flow to the drainage part 152 and be discharged through the drainage hole 153, and when soil is mixed, the drainage hole 153 at the lower part will be blocked and retained, but the drainage hole 153 at the upper part can continuously discharge the water.

Referring to fig. 6 and 7, in order to remove the mud guard 150, a limit protrusion ring 154 abutting against an upper side of the connection part 151 is provided in the rainwater pipe 131, an inner diameter of the limit protrusion ring 154 is smaller than an outer diameter of the connection part 151, a guide part 155 is provided at a lower side of the limit protrusion ring 154, a diameter of the guide part 155 is gradually reduced from bottom to top, and a rim of a minimum diameter of the guide part 155 is identical to the outer diameter of the connection part 151. A clamping convex ring 156 is arranged on the inner wall of the rain pipe 131 and positioned at the lower side of the limiting convex ring 154, the inner diameter of the clamping convex ring 156 is equal to the outer diameter of the connecting part 151,

the connecting portion 151 is slidably connected with a claw 160 abutting against the clamping convex ring 156, and a driving member for driving the claw 160 to move is arranged on the connecting portion 151. Offer the groove 161 that slides that supplies jack catch 160 to slide on the inner wall of connecting portion 151, the orientation of seting up of groove 161 sets up downwards to one side, and jack catch 160 is close to the one end of joint bulge loop 156 and sets up for the button head, and this end embedding to connecting portion 151 back, and the surface of connecting portion 151 flushes, and the driving piece is the driving tube 162 with connecting portion 151 inner wall threaded connection. In order to make the claw 160 slide out when not moving, two ends of the claw 160 are provided with protrusions 163, the protrusions 163 are located on the side wall of the claw 160, the inner wall of the sliding groove 161 and the two ends are provided with grooves 164 corresponding to the protrusions 163, when the claw 160 slides, the protrusions 163 on the two ends do not contact with the driving pipe 162 and the clamping convex ring 156, and one end of the driving pipe 162 will abut against one end of the claw 160 located in the connecting part 151.

The implementation principle of the embodiment is as follows: when rainwater flows downwards from the planting soil layer 122, the rainwater flows into the gravel layer 121, the rainwater flows through gaps among the gravel and flows into the drainage blind ditch 120 through holes in the perforated blind pipes 126, the rainwater on the upper side of the ground reservoir is quickly guided into the drainage blind ditch 120 under the action of the perforated blind pipes 126, the rainwater collected in the drainage blind ditch 120 is discharged through the rainwater port 132, the supporting strength of the gravel is far greater than that of the drainage plate, and the gap required for drainage exists before the gravel, so that the supporting strength can be kept while the drainage function is kept, the existence of the drainage gap can be kept when soil returns, and a good rainwater drainage effect can be kept.

Because the setting of metalling 121, the rainwater will be discharged through inlet for stom water 132 sooner, lead to the planting soil layer 122 on upper strata to lack moisture in the less season of rainwater, the position of cardboard 143 is adjusted to the accessible, thereby make the upper and lower position of adjusting tube 136 change, inlet for stom water 132 will move in vertical direction, back is increaseed to inlet for stom water 132, can remain some can supply to plant the absorptive moisture of soil layer 122 in drainage blind ditch 120, operating personnel is when adjusting the position of adjusting tube 136, the accessible people hand is gone to break driving lever 144 off with the fingers and thumb, also can block the back with two driving levers 144 through the preparation instrument, make both be close to each other, be convenient for adjust.

In order to block the soil brought out by the rainwater, the soil is firstly accumulated on the water-repellent part 152, and the lower side of the water-repellent part 152 is blocked and the upper side of the water-repellent part can drain water through other water-repellent holes 153. When the downspout 131 is opened, the driving pipe 162 can be rotated, so that the driving pipe is not collided on the claw any more, and when the mud guard 150 moves downwards at the moment, the lower end of the claw 160 is collided on the clamping convex ring, so that the mud guard 150 can be taken out and cleaned in the connecting part 151 in a complete embedding manner, and the mud guard can also be arranged at the bottom end of the downspout 131 for the convenience of disassembly and assembly.

When the installation is needed, the mud guard 150 is inserted into the rain pipe 131, the upper end of the connecting part 151 will abut against the guiding part 155, and will gradually move to the concentric position of the rain pipe 131 under the guiding of the inclined plane, and the joint of the clamping convex ring 156 and the outer wall of the connecting part 151 will not be affected. Then, the driving tube 162 is rotated to make one end of the driving tube abut against the claw 160, so as to drive the claw 160 to move downwards in an inclined manner, thereby abutting and clamping the convex ring 156 to form a fixing effect.

The embodiments of the present invention are preferred embodiments of the present invention, and the scope of the present invention is not limited by these embodiments, so: all equivalent changes made according to the structure, shape and principle of the invention are covered by the protection scope of the invention.

Claims

1. The utility model provides a building basement top roof drainage french drain structure, includes roof (100), be equipped with waterproof layer (110) on roof (100), its characterized in that: a plurality of drainage blind ditches (120) are arranged on the waterproof layer (110) at intervals, a gravel layer (121) is arranged among the drainage blind ditches (120), a planting soil layer (122) is arranged on the upper side of the gravel layer (121), each drainage blind ditch (120) comprises two vertically arranged baffles (123) and a concrete cover plate (124) arranged on the upper side, drainage through holes (125) opposite to the gravel layer (121) are formed in the baffles (123), and a drainage assembly (130) is arranged in each drainage blind ditch (120);

the sewer component (130) comprises a rainwater pipe (131) arranged in the top plate (100) in a penetrating mode, a rainwater port (132) arranged at the top of the rainwater pipe (131) and located in the drainage blind ditch (120), and a drainage pipe (133) detachably connected to the lower end of the rainwater pipe (131), wherein the rainwater port (132) can be arranged in a lifting mode;

the rainwater pipe (131) is detachably connected with a mud guard (150), the mud guard (150) comprises a connecting part (151) and a water drainage part (152) which are connected with the rainwater pipe (131), the mud guard (150) is integrally of a thin-wall hollow structure, the lower side of the mud guard is provided with an opening, the connecting part (151) is cylindrical, the water drainage part (152) is integrally arranged on the upper side of the connecting part (151), the diameter of the water drainage part (152) is gradually increased from top to bottom, and the upper part of the water drainage part (152) is provided with a plurality of water drainage holes (153);

be provided with in downspout (131) and be used for contradicting spacing bulge loop (154) of connecting portion (151) upside, just be located on downspout (131) inner wall spacing bulge loop (154) downside is equipped with joint bulge loop (156), the internal diameter of spacing bulge loop (154) is less than the external diameter of connecting portion (151), the internal diameter of joint bulge loop (156) equals the external diameter of connecting portion (151), it is connected with jack catch (160) that are used for contradicting on joint bulge loop (156) to slide on connecting portion (151), be provided with on connecting portion (151) and be used for ordering about the driving piece of jack catch (160) motion.

2. The top plate drainage blind ditch structure of the building basement according to claim 1, characterized in that: the gravel layer (121) is internally provided with a blind pipe (126) with holes, the blind pipe (126) with holes is vertical to the length direction of the drainage blind ditch (120), one end of the blind pipe (126) with holes is inserted into the drainage through hole (125), and the aperture of the blind pipe with holes (126) is smaller than the particle size of the gravel layer (121).

3. The top plate drainage blind ditch structure of the building basement according to claim 2, characterized in that: a concrete protective layer (127) is arranged on the lower side of the blind pipe with the hole (126), the upper side of the concrete protective layer (127) is in a circular arc shape matched with the blind pipe with the hole (126), and the hole on the lower side of the blind pipe with the hole (126) is plugged.

4. The top roof drainage blind ditch structure of the building basement according to claim 1 or 3, characterized in that: the thickness of the gravel layer (121) is larger than the diameter of the drainage through hole (125) and lower than the height of the concrete cover plate (124).

5. The top plate drainage blind ditch structure of the building basement according to claim 4, characterized in that: the inner wall at the top of the rainwater pipe (131) is provided with a corrugated expansion pipe (135), the upper end of the corrugated expansion pipe (135) is fixedly connected with the rainwater port (132), the lower water port of the rainwater port (132) is fixedly connected with an adjusting pipe (136) penetrating through the corrugated expansion pipe (135), and the lower end of the adjusting pipe (136) is connected with the inner wall of the rainwater pipe (131) in a clamping manner.

6. The top plate drainage blind ditch structure of the building basement according to claim 1, characterized in that: offer on the inner wall of connecting portion (151) and supply slot (161) that slides of jack catch (160), the direction of seting up of slot (161) that slides sets up downwards to one side, jack catch (160) are close to the one end of joint bulge loop (156) and are the button head setting, and this end embedding to connecting portion (151) back, the surface of connecting portion (151) flushes, the driving piece is for driving tube (162) with connecting portion (151) inner wall threaded connection.

7. The top plate drainage blind ditch structure of the building basement according to claim 6, characterized in that: the lower side of the limit convex ring (154) is provided with a guide part (155), the diameter of the guide part (155) is gradually reduced from bottom to top, and the edge with the minimum diameter of the guide part (155) is the same as the outer diameter of the connecting part (151).