CN110565774B

CN110565774B - Construction method of basement open drainage system with weak permeability soil

Info

Publication number: CN110565774B
Application number: CN201910781032.2A
Authority: CN
Inventors: 张勋来
Original assignee: China MCC17 Group Co Ltd
Current assignee: China MCC17 Group Co Ltd
Priority date: 2019-08-23
Filing date: 2019-08-23
Publication date: 2021-03-19
Anticipated expiration: 2039-08-23
Also published as: CN110565774A

Abstract

The invention discloses a construction method of a basement open drainage system with weak permeability soil, and belongs to the technical field of basement drainage construction. Reserving drainage channels on a base soil layer below the post-cast strip, paving base cushion layers on the base soil layer and the surfaces of the drainage channels, and finishing the bottom surfaces of the drainage channels to form a slope of 0.4-0.6% along the direction close to the concrete shear wall; paving a drain pipe on the bottom foundation pad layer of the drainage groove, filling a crushed stone material layer in the drainage groove and leveling; pouring a concrete shear wall, and building a semicircular protective well and a water collecting well which is positioned at the inner side and is communicated with a drainage pipe on the outer side of a post-pouring belt at the outer side of the concrete shear wall; a self-suction water level control pump is arranged in the water collecting well, and the water level in the water collecting well is always reduced to be below a bottom plate of the post-pouring belt; and pouring bottom plate concrete on two sides of the post-cast strip, and pouring and maintaining the concrete of the post-cast strip according to the construction specification after the concrete meets the requirement. Overcomes the persistent problem of seepage at the post-cast strip caused by seepage of underground water or erosion of surface water.

Description

Construction method of basement open drainage system with weak permeability soil

Technical Field

The invention belongs to the technical field of basement drainage construction, and particularly relates to a construction method of a basement open drainage system with weak permeability soil.

Background

At present, with the development of economy, residents live more and more intensively, so that the cell scale is larger and larger, high-rise buildings are increased, and one or more layers of basements (civil air defense projects or basements) are generally arranged to meet the requirements of use functions. People put forward higher requirements on the construction quality of the basement, the construction quality is good, and the use value of the basement is directly influenced.

Because most basements are arranged below the main building, the settlement post-cast strips are arranged along the periphery of the main building during design, and a certain number of contraction post-cast strips are arranged according to the size of the basements, and the post-cast strips can be plugged after the main structure is finished or within a certain time.

Because the post-cast strip is completely disconnected along the outer wall of the basement, a retaining wall is built along the post-cast strip of the outer wall to facilitate backfilling after the construction of the basement is finished, so that the problem is solved. The backfilled underground water and surface water directly stay in the post-cast zone of the basement, and a water pump is usually placed in the post-cast zone for drainage in a drainage method, so that the requirement of thorough drainage cannot be met.

Disclosure of Invention

The invention aims to solve the defects in the prior art, and provides a construction method of a basement clear drainage system with weak permeability soil.

In order to achieve the purpose, the invention adopts the following scheme:

a construction method of a basement open drainage system with weak permeability soil comprises the following steps:

step one, reserving drainage channels on a base soil layer below a post-cast strip, paving base cushion layers on the base soil layer and the surfaces of the drainage channels, and finishing the bottom surfaces of the drainage channels to form a slope of 0.4% -0.6% along the direction close to a concrete shear wall;

secondly, laying a drain pipe on the bottom foundation pad layer of the drainage groove, filling a crushed stone material layer in the drainage groove and leveling;

thirdly, pouring a concrete shear wall, building a semicircular protective well concrete shear wall on the outer side of a post-cast strip on the outer side of the concrete shear wall, excavating and building a water collecting well on the inner side of the semicircular protective well concrete shear wall, wherein the water collecting well is communicated with a drainage pipe;

step four, installing a self-suction water level control pump in the water collecting well, wherein the self-suction water level control pump is communicated with an outer drainage channel through a water pipe, and the water level in the water collecting well is always reduced to be below a post-pouring belt bottom plate;

and fifthly, pouring bottom plate concrete on two sides of the post-cast strip, pouring the concrete of the post-cast strip according to the construction specification after the concrete meets the requirement, and maintaining the concrete.

Furthermore, the width of the notch of the drainage ditch is 1-1.5 times larger than that of the post-cast strip.

Furthermore, the bottom surface and the side wall of the foundation soil layer positioned at the drainage ditch are embedded with fixed components, the fixing component comprises a shell, a fixing rod and a track piece are arranged in the shell, the fixing rod is connected with a rotating rod through a bearing, an extension spring is fixedly connected with the middle part of the rotating rod, one end of the extension spring, which is far away from the rotating rod, is fixedly connected with a bottom plate of the shell, one end of the rotating rod, which is far away from the fixed rod, is hinged with a driving rod, one end of the driving rod, which is far away from the rotating rod, is hinged with a hook part, one end of the hook piece, which is far away from the transmission rod, penetrates through the shell and extends to the outer side of the foundation mat layer, a sliding block is fixedly connected to the outer side of the hook piece, the sliding blocks are connected in the track pieces in a sliding mode, metal protective nets are fixed on the hook pieces, and the mesh number of the metal protective nets is smaller than the particle size of the gravel material layer.

Furthermore, the middle part of the top surface of the crushed stone layer is coated with a waterproof material with the thickness of 5-10 mm, and the width of the waterproof material is 30-50 mm larger than that of the post-cast strip.

Furthermore, a drain hole is formed in the pipe wall of the drain pipe, and the diameter of the drain hole is smaller than the particle size of the crushed stone layer.

Compared with the prior art, the invention can obtain the following technical effects:

1. the basement post-pouring strip is provided with a drainage groove, a gravel material layer, a drainage pipe and a foundation cushion layer, the foundation cushion layer is used for leveling a bottom plate concrete pouring base surface, the drainage groove is integrated into a slope of 0.4% -0.6%, accumulated water in the drainage groove can be conveniently drained, dirt can be conveniently drained timely, the base plate concrete pouring base surface is attached to the drainage groove, meanwhile, a waterproof material is coated on the top surface of the gravel material layer to block the communication between the post-pouring strip and the drainage groove, the waterproof effect of the post-pouring strip is further achieved, the fact that accumulated water does not exist in the post-pouring strip of the basement and the post-pouring strip steel bars are rustless is guaranteed, the plugging construction quality of the post-pouring strip is further guaranteed, and the.

2. The fixing component is arranged in the track piece, and comprises a shell, a fixing rod, a rotating rod, a transmission rod, a sliding block, a hook piece and an extension spring, wherein the extension spring is used for stretching the rotating rod to drive the transmission rod to rotate so as to enable the sliding block to slide downwards in the track piece to fix the metal protective net with the hook piece, so that the foundation cushion layer is prevented from entering a crushed stone material layer or running off, drainage in a drainage groove is facilitated, and meanwhile, a drainage hole of the drainage pipe is prevented from.

3. The method adopts measures of changing basement outer wall post-cast strip plugging and innovating drainage to prevent the post-cast strip from influencing the quality of the reinforcing steel bars of the post-cast strip and the construction quality of the post-cast strip due to long-term soaking of underground water or surface water, improves the construction efficiency, reduces the construction cost and the later maintenance cost, and overcomes the persistent symptoms of leakage at the post-cast strip due to underground water leakage or surface water erosion.

Drawings

FIG. 1 is a perspective view of the overall structure of the present invention;

FIG. 2 is a schematic view of the overall structure of the fixing member of the present invention;

fig. 3 is a plan view of the overall structure of the present invention.

In the figure: 1. a foundation soil layer; 2. a drainage gutter; 21. a fixing assembly; 211. a housing; 212. fixing the rod; 213. a rail member; 214. rotating the rod; 215. a transmission rod; 216. a hook member; 217. a slider; 218. a metal protective net; 219. an extension spring; 3. a base mat layer; 4. a concrete shear wall; 5. a drain pipe; 6. a crushed stone layer; 7. post-pouring a belt; 8. a semicircular protection well; 9. a water collecting well; 10. bottom plate concrete; 11. a water-resistant material; 12. and (4) an outer drainage channel.

Detailed Description

In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is further described in detail with reference to the following embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.

Example 1:

as shown in fig. 1 to 3, a construction method of a basement clear drainage system with weak permeability soil comprises the following steps:

firstly, reserving a drainage ditch 2 on a foundation soil layer 1 below a post-cast strip 7, then paving a foundation cushion layer 3 on the surfaces of the foundation soil layer 1 and the drainage ditch 2, arranging the bottom surface of the drainage ditch 2 to have a gradient of 0.5% along the direction close to a concrete shear wall 4, and slowly flowing water in the drainage ditch 2 along the direction close to the concrete shear wall 4 by utilizing the gradient, so as to be beneficial to draining water and preventing water accumulation;

secondly, laying a drain pipe 5 on the bottom foundation cushion layer 3 of the drainage groove 2, filling the crushed stone material layer 6 in the drainage groove 2 and leveling, and effectively and quickly draining water by using the drain pipe 5;

thirdly, pouring the concrete shear wall 4, building a semicircular protective well 8 on the outer side of a post-cast strip 7 on the outer side of the concrete shear wall 4, digging and building a water collecting well 9 on the inner side of the semicircular protective well 8 by utilizing the semicircular protective well 8, wherein the water collecting well 9 is communicated with a drain pipe 5, water in a drainage ditch 2 flows into the water collecting well 9 through the drain pipe 5 for centralized treatment, and the semicircular protective well 8 protects the post-cast strip 7 from external underground water flowing into the post-cast strip 7 to cause leakage;

fourthly, installing a self-suction water level control pump in the water collecting well 9, wherein the self-suction water level control pump is communicated with an outer drainage channel through a water pipe, and the water level in the water collecting well 9 is always lowered to be below the bottom plate of the post-pouring belt 7;

and step five, pouring the bottom plate concrete 10 on the two sides of the post-cast strip 7, and pouring and maintaining the concrete of the post-cast strip 7 according to the construction specification after the concrete meets the requirement.

In the present embodiment, it is further preferable that the width of the drainage groove 2 is 1 times larger than the width of the post-cast strip 7, which facilitates drainage under the post-cast strip 7.

In this embodiment, it is further preferable that the fixing assembly 21 is embedded in the bottom surface and the side wall of the foundation soil layer 1 at the drainage groove 2, the fixing assembly 21 includes a housing 211, a fixing rod 212 and a rail member 213 are disposed in the housing 211, a rotating rod 214 is connected to the fixing rod 212 through a bearing, an extension spring 219 is fixedly connected to the middle of the rotating rod 214, one end of the extension spring 219 away from the rotating rod 214 is fixedly connected to the bottom plate of the housing 211, one end of the rotating rod 214 away from the fixing rod 212 is hinged to a transmission rod 215, one end of the transmission rod 215 away from the rotating rod 214 is hinged to a hook member 216, one end of the hook member 216 away from the transmission rod 215 extends to the outside of the foundation mat 3 through the housing 211, a sliding block 217 is fixedly connected to the hook member 216 by welding, the sliding block 217 is slidably connected to the rail member 213. The tension spring 219 is used for applying acting force to the rotating rod 214 to drive the driving rod 215 to rotate, the sliding block 217 moves in the rail member 213 to drive the hook member 216 to move downwards so as to hook the metal protective net 218 to realize fixation, and water flow is prevented from carrying away the foundation bed layer 3 or carrying into the gravel layer 6 in the drainage process to influence the drainage effect.

In the further preferred scheme of this embodiment, the middle part of the top surface of the crushed stone material layer 6 is coated with a waterproof material 11 with a thickness of 8mm, the width of the waterproof material 11 is 40mm larger than that of the post-cast strip 7, and the waterproof material 11 is used for blocking the communication between the post-cast strip 7 and the drainage groove 2, so as to effectively realize the function of preventing water leakage.

In this embodiment, it is further preferable that the wall of the drainage pipe 5 is provided with a drainage hole, and the diameter of the drainage hole is smaller than the particle size of the crushed stone layer 6, so as to prevent the influence of blockage on the drainage effect.

It will be evident to those skilled in the art that the invention is not limited to the details of the foregoing illustrative embodiments, and that the present invention may be embodied in other specific forms without departing from the spirit or essential attributes thereof. The present embodiments are therefore to be considered in all respects as illustrative and not restrictive, the scope of the invention being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein.

Furthermore, it should be understood that although the present description refers to embodiments, not every embodiment may contain only a single embodiment, and such description is for clarity only, and those skilled in the art should integrate the description, and the embodiments may be combined as appropriate to form other embodiments understood by those skilled in the art.

Claims

1. A construction method of a basement open drainage system with weak permeability soil is characterized by comprising the following steps:

step one, reserving a drainage groove (2) on a foundation soil layer (1) below a post-cast strip (7), laying a foundation cushion layer (3) on the surface of the foundation soil layer (1) and the drainage groove (2), arranging the bottom surface of the drainage groove (2) into a slope of 0.4% -0.6% along the direction close to a concrete shear wall (4), pre-embedding a fixing component (21) on the bottom surface and the side wall of the foundation soil layer (1) at the drainage groove (2), wherein the fixing component (21) comprises a shell (211), a fixing rod (212) and a rail part (213) are arranged in the shell (211), the fixing rod (212) is connected with a rotating rod (214) through a bearing, the middle part of the rotating rod (214) is fixedly connected with an extension spring (219), and one end of the extension spring (219) far away from the rotating rod (214) is fixedly connected on the bottom plate of the shell (211), one end, far away from the fixing rod (212), of the rotating rod (214) is hinged to a transmission rod (215), one end, far away from the rotating rod (214), of the transmission rod (215) is hinged to a hook piece (216), one end, far away from the transmission rod (215), of the hook piece (216) penetrates through the shell (211) and extends to the outer side of the basic cushion layer (3), a sliding block (217) is fixedly connected to the outer side of the hook piece (216), the sliding block (217) is connected into the rail piece (213) in a sliding mode, a metal protective net (218) is fixed to the hook piece (216), and the mesh number of the metal protective net (218) is smaller than the particle size of the gravel layer (;

secondly, laying a drain pipe (5) on the bottom foundation cushion (3) of the drainage groove (2), filling a crushed stone material layer (6) in the drainage groove (2) and leveling;

thirdly, pouring the concrete shear wall (4), building a semicircular protective well (8) on the outer side of a post-cast strip (7) on the outer side of the concrete shear wall (4), excavating and building a water collecting well (9) on the inner side of the semicircular protective well (8), wherein the water collecting well (9) is communicated with a drain pipe (5);

fourthly, installing a self-suction water level control pump in the water collecting well (9), wherein the self-suction water level control pump is communicated with an outer drainage channel (12) through a water pipe, and the water level in the water collecting well (9) is always reduced below the bottom plate of the post-cast strip (7);

and fifthly, pouring bottom plate concrete (10) on two sides of the post-cast strip (7), and pouring and curing the concrete of the post-cast strip (7) according to construction specifications after the concrete meets the requirements.

2. The construction method of the basement clear drainage system with weak permeability soil according to claim 1, wherein the width of the drainage ditch (2) is 1-1.5 times larger than the width of the post-cast strip (7).

3. The construction method of the open drainage system of the basement with the weak permeability soil as claimed in claim 1, wherein the middle of the top surface of the gravel layer (6) is coated with a waterproof material (11) with a thickness of 5mm to 10mm, and the width of the waterproof material (11) is 30mm to 50mm larger than that of the post-cast strip (7).

4. The construction method of the open drainage system of the basement with weak permeability soil as claimed in claim 1, wherein the wall of the drainage pipe (5) is provided with a drainage hole, and the diameter of the drainage hole is smaller than the particle size of the gravel layer (6).