CN112832288A

CN112832288A - Anti-floating structure of sloping field building basement and construction method thereof

Info

Publication number: CN112832288A
Application number: CN202110009031.3A
Authority: CN
Inventors: 苏文章; 黄伟鹏; 江伟
Original assignee: Xiamen Zhongjian Northeast Designing Institute Co ltd
Current assignee: Xiamen Zhongjian Northeast Designing Institute Co ltd
Priority date: 2021-01-05
Filing date: 2021-01-05
Publication date: 2021-05-25

Abstract

The utility model relates to an anti structure of floating of hillside fields building basement relates to geotechnical engineering anti field of floating technology, and it includes the foundation ditch, basement body and hydrophobic pipeline structure, hydrophobic pipeline structure sets up in the below of basement body bottom plate, hydrophobic pipeline structure is linked together with municipal rainwater well, hydrophobic pipeline structure comprises a plurality of bridge type strainer. This application has the effect that reduces the whole cost of anti structure engineering that floats of sloping ground building basement.

Description

Anti-floating structure of sloping field building basement and construction method thereof

Technical Field

The application relates to the field of geotechnical engineering anti-floating technology, in particular to a basement anti-floating structure.

Background

The slope building basement has the advantages that one side of the slope building basement is high, the other side of the slope building basement is low, the height difference of the ground shape is large, multiple leveling elevations exist in the middle of the basement, the common basement anti-floating design idea is based on 'anti', namely the anti-floating design water level is provided according to an investigation report, and the water buoyancy is balanced by the aid of the earth covering weight on the top plate of the basement and the self weight of the basement. When the weight is less than the water buoyancy, anti-floating measures such as anti-floating piles or anti-floating anchor rods are adopted.

In the related technology, for example, the anti-floating anchoring structure and the anti-floating anchoring construction method for the basement bottom plate disclosed in the Chinese patent with the application publication number of CN111894045A, grouting bodies are installed in a foundation in the construction process; then the bearing pier is arranged above the grouting body; then, connecting the prestressed tendon between the first anchorage device and the second anchorage device, and tensioning the prestressed tendon to ensure that the prestressed tendon keeps a preset tension force; and finally, laying a bottom plate layer above the bearing pier, so that the connecting ribs are buried in the bottom plate layer, and thus completing the construction operation of the anti-floating anchoring structure of the basement bottom plate.

Also discloses an anchoring structure and a construction method after the basement is inclined, floated, reset and leveled as disclosed in the Chinese patent with the publication number of CN 108560611B. The anchor structure is "do" type anchor structure, and the anchor structure includes the anchor stake, the concrete bottom plate, the bed course, grout is full of layer and upper seal, anchor stake upper end and concrete bottom plate fixed connection, the concrete bottom plate lower extreme is equipped with the bed course, be equipped with grout filling layer between bed course and the concrete bottom plate, the concrete bottom plate up end is equipped with upper seal, be equipped with three anchor stake reinforcing bars in the anchor stake, three anchor stake reinforcing bar upper ends run through the concrete bottom plate and stretch into upper seal, be equipped with the anchor slab in the upper seal, the anchor slab cover is on three anchor stake reinforcing bars.

In view of the above-mentioned related technologies, the inventor believes that, the anti-floating setting is performed on the basement body by using the anti-floating anchor, the anti-floating strength of the anti-floating anchor needs to correspond to the anti-floating water level, and the water level value for the anti-floating design of the basement cannot be accurately determined according to the anti-floating water level provided by the survey report, even if the anti-floating water level value of each region can be partitioned by the survey report, the anti-floating water level of each region is suddenly changed and does not accord with the actual situation, so that in the conventional construction, the anchoring setting is generally performed by using the highest anti-floating water level value as the standard, the cost of the anchoring structure is in direct proportion to the anti-floating water level, and the overall construction cost is too high, and therefore needs to be improved.

Disclosure of Invention

In order to solve the problem that the overall construction cost of the anti-floating structure project of the sloping field building basement is too high, the application provides an anti-floating structure of the sloping field building basement and a construction method thereof.

First aspect, the application provides a sloping field building basement anti-floating structure adopts following technical scheme:

the utility model provides an anti structure of floating of sloping field building basement, includes the foundation ditch, basement body and hydrophobic pipeline structure, hydrophobic pipeline structure sets up in the below of basement body bottom plate, hydrophobic pipeline structure is linked together with municipal rainwater well, hydrophobic pipeline structure comprises a plurality of bridge type strainer pipes.

Through adopting above-mentioned technical scheme, set up the drain line that is linked together with municipal rainwater through the below at the basement body for the basement body is when receiving water level buoyancy, and the basement can utilize gravity drainage to cause groundwater to municipal rainwater well to excrete from overflowing instinctively, falls groundwater to basement local bottom position once, thereby solves the anti problem of floating of basement body.

Optionally, a blind ditch is arranged in the bottom of the foundation pit, the drain pipeline structure is buried in the blind ditch, and a filter material is backfilled in the blind ditch.

Through adopting above-mentioned technical scheme, utilize the filler that sets up in the french drain to play the effect of purifying and filtering the soil property, avoid the soil property in the foundation ditch bottom to discharge through hydrophobic pipeline structure along with groundwater together, simultaneously, utilize the french drain can also play the effect that prevents hydrophobic pipeline structure direct pressurized.

Optionally, the hydrophobic pipeline structure is wrapped by a first non-woven fabric, and the filter material is wrapped by a second non-woven fabric.

Through adopting above-mentioned technical scheme, utilize first non-woven fabrics can avoid in the direct infiltration drain line of dust in the filter material, avoid soil erosion and water loss, utilize the second non-woven fabrics can avoid in the direct infiltration filter material of soil property in can.

Optionally, the drainage pipeline structure includes horizontal drainage pipeline and horizontal vertical drainage pipeline, horizontal drainage pipeline and horizontal vertical drainage pipeline are the setting of upper and lower position relation, horizontal drainage pipeline sets up in the week side of basement body bottom, horizontal vertical drainage pipeline sets up in the bottom of basement body.

Through adopting above-mentioned technical scheme, divide into the horizontal longitudinal drainage pipeline and the horizontal drainage pipeline that are upper and lower position relation through the pipeline structure that drains for this system can carry out quick drainage to the water level of co-altitude not, and when being in rainy season, can accelerate drainage efficiency.

Optionally, be provided with the rib on the outer wall of basement body bottom, rib ring basement body outer wall contour sets up the round, the rib stretches into in the filter material.

Through adopting above-mentioned technical scheme, utilize the rib to make the bottom of basement body can receive the filter material suppression, further increase the bearing of basement body, can improve the anti ability of floating of basement body simultaneously.

Optionally, the volume of foundation ditch is greater than the volume of basement body, backfill in the foundation ditch has the stickness soil that covers basement body top and foundation ditch bottom.

Through adopting above-mentioned technical scheme, utilize stickness soil can prevent that surface water from directly oozing into the foundation ditch in, play the effect of isolated surface water, can play the effect that increases basement body bearing simultaneously.

Optionally, the basement body is provided with the bed course, the area of bed course is greater than the enclosed area of rib, each side of bed course all stretches out outside each side of rib.

Through adopting above-mentioned technical scheme, utilize the bed course can play the effect of keeping apart basement body and foundation ditch bottom, when avoiding concrete placement shaping basement body, the concrete infiltration of flow state is in the foundation ditch.

Optionally, the bottom of the basement body is provided with a bearing platform integrally formed with the basement body, the outer wall of the bearing platform is coated by the cushion layer, and the lower end of the bearing platform extends out of the filter material.

Through adopting above-mentioned technical scheme, utilize the cushion cap can increase the whole weight of basement body for the bearing of basement body is bigger, further increases the anti ability of floating of basement body.

In a second aspect, the present application provides a construction method of an anti-floating structure, which adopts the following technical scheme:

a construction method for the anti-floating construction as described above, comprising the steps of:

s1, excavating a foundation pit, and cleaning and leveling sundries at the bottom of the foundation pit;

s2, digging a blind ditch in the bottom of the foundation pit, and paving a second non-woven fabric in the blind ditch;

s3, installing a drain pipeline structure in the blind ditch, backfilling a filter material after the surface of the drain pipeline structure is required to be wrapped by the first non-woven fabric and installing, and covering the surface of the filter material with the second non-woven fabric again;

s4, forming the basement body, then backfilling cohesive soil covering the basement body in the foundation pit, and tamping the cohesive soil after backfilling.

By adopting the technical scheme, the arrangement of the drainage pipeline structure can be completed through the matching among the steps S1, S2 and S3, and the matching between the basement body and the conveying pipeline structure can be completed through the step S4.

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

the underground water is led to a municipal rainwater well by gravity drainage to drain and overflow, and is lowered to the bottom of the basement body, so that the anti-floating problem of the basement body is solved;

the water head pressure load born by the bottom of the basement body is also much smaller, the bottom thickness and the bottom plate reinforcing bars of the basement body are smaller, and the consumption of reinforcing steel bars and concrete at the bottom of the basement body can be greatly reduced;

natural drainage is utilized, and later-period equipment maintenance and investment are not needed, so that the method is a green building technology.

Drawings

Fig. 1 is a schematic elevation structure view of an anti-floating structure of a basement of a sloping field building according to an embodiment of the application;

fig. 2 is a side view structure schematic diagram of a sloping field building basement anti-floating structure of the embodiment of this application.

Reference numerals: 1. a foundation pit; 2. a basement body; 21. a reinforcing portion; 22. a bearing platform; 23. a cushion layer; 3. a drain pipe structure; 31. a horizontal longitudinal drainage line; 32. a horizontal transverse drain pipe; 33. a first nonwoven fabric; 4. cohesive soil; 5. blind ditches; 51. a first trench; 52. a second trench; 6. filtering the material; 61. a second nonwoven fabric.

Detailed Description

The present application is described in further detail below with reference to figures 1-2.

The embodiment of the application discloses anti structure of floating of sloping field building basement. Referring to fig. 1 and 2, the slope bottom building basement anti-floating structure comprises a foundation pit 1, a basement body 2 and a drainage pipeline structure 3, wherein the basement body 2 and the drainage pipeline structure 3 are both arranged in the foundation pit 1, and the drainage pipeline structure 3 is arranged at the bottom of the basement body 2; wherein, foundation ditch 1's volume is greater than the basement, backfills in foundation ditch 1 to have the stickness soil 4 that covers 2 tops of basement body and 1 bottoms of foundation ditch.

Referring to fig. 1 and 2, a blind ditch 5 is arranged in the bottom of a foundation pit 1, the blind ditch 5 comprises a first groove 51 and a second groove 52, the first groove 51 is provided with a plurality of grooves side by side, each first groove 51 is arranged below a basement body 2, the second groove 52 is provided with two grooves, and the two second grooves 52 are respectively arranged on two opposite sides of the basement; the drain pipeline structure 3 comprises horizontal longitudinal drain pipelines 31 and horizontal transverse drain pipelines 32, the horizontal longitudinal drain pipelines 31 are provided with a plurality of channels and are respectively embedded in the first grooves 51, the horizontal longitudinal drain pipelines 31 are respectively communicated with municipal rainwater wells, the horizontal transverse drain pipelines 32 are provided with a plurality of channels and are respectively embedded in the second grooves 52, and the horizontal transverse drain pipelines 32 are respectively communicated with the municipal rainwater wells.

Referring to fig. 1 and 2, the horizontal transverse drainage pipe 32 and the horizontal longitudinal drainage pipe 31 are both composed of a plurality of bridge type filter pipes, and the horizontal transverse drainage pipe 32 and the horizontal longitudinal drainage pipe 31 are both wrapped with a first nonwoven fabric 33; wherein, all pack the filter material 6 in first slot 51 and second slot 52, filter material 6 adopts the gravel, all is provided with the second non-woven fabrics 61 of parcel filter material 6 in each way first slot 51 and second slot 52.

After the drainage pipeline structure 3 is laid, each horizontal longitudinal drainage pipeline 31 is arranged on the periphery of the bottom of the basement body 2, and each horizontal transverse drainage pipeline 32 is arranged on the bottom of the basement body 2.

Referring to fig. 1 and 2, a reinforcing part 21 is arranged on the outer wall of the bottom of the basement body 2, the reinforcing part 21 is arranged around the periphery of the outer wall of the basement body 2, a bearing platform 22 integrally formed with the basement body 2 is further arranged on the lower surface of the basement body 2, the bearing platform 22 is provided with a plurality of channels, and the bearing platforms 22 are arranged in an array along the length direction and the width direction of the basement body 2; after the backfill of the cohesive soil 4 is finished, the lower ends of the bearing platforms 22 penetrate through the blind ditches 5 and are installed in the bottom of the foundation pit 1, and the reinforcing part 21 arranged at the bottom of the basement body 2 extends into the filter material 6.

Referring to fig. 1 and 2, the basement body 2 is provided with a cushion layer 23, the area of the cushion layer 23 is larger than the enclosing area of the reinforcing part 21, each side of the cushion layer 23 extends out of each side of the reinforcing part 21, the cushion layer 23 is formed by laying high-strength materials, and the cushion layer 23 can be used as a bottom die so that concrete cannot seep into the bottom of the foundation pit 1 when the basement body 2 is formed by pouring concrete.

Wherein, it should be noted that, should be equipped with the vacuum pump communicated with horizontal longitudinal drain 31 in the municipal rainwater well, when needing to accelerate the drainage, can utilize the water pump to evacuate and drain; in order to ensure the vacuumizing effect, the side wall of the foundation pit 1 is covered with a sealing material layer, and a sealing geotextile covering the second non-woven fabric 61 is further arranged between the cohesive soil 4 and the surface of the foundation pit 1.

The implementation principle of the anti structure of floating of sloping field building basement of the embodiment of this application does:

arranging a drainage blind ditch 5 between the outer wall of the basement and the excavation surface of the foundation pit 1, and backfilling a filter material 6, wherein the water diversion point is positioned at the highest point of the field; the latticed drainage blind ditches 5 are longitudinally and transversely distributed below the basement body 2 and are communicated with the drainage blind ditches 5 on the periphery of the basement body 2 in an intersecting manner; after the two drainage channels are arranged, the gravity drainage is utilized to lead the underground water to the municipal rainwater well to drain automatically, and the underground water is dropped to the bottom of the basement body 2, so that the anti-floating problem of the basement body 2 is solved. The flood peak pressure load that basement body 2 bore has also been little a lot, and the thickness and the bottom plate arrangement of reinforcement of basement body 2 bottom are all less, but 2 basement body's of the significantly reduced reinforcing bar and concrete volume need not later stage equipment maintenance and input owing to utilize gravity natural drainage, are a green building technology.

The embodiment of the application also discloses a construction method for the anti-floating structure, which comprises the following steps:

s1, excavating the foundation pit 1, and cleaning and leveling sundries at the bottom of the foundation pit 1;

s2, digging a blind ditch 5 in the bottom of the foundation pit 1, and paving a second non-woven fabric 61 in the blind ditch 5;

s3, installing the drain pipeline structure 3 in the blind ditch 5, backfilling the filter material 6 after the installation of the drain pipeline structure 3 needs to be wrapped by the first non-woven fabric 33, and covering the surface of the filter material 6 with the second non-woven fabric 61 again;

s4, forming the basement body 2, then backfilling cohesive soil 4 covering the basement body 2 in the foundation pit 1, and tamping the cohesive soil 4 after backfilling.

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

Claims

1. The utility model provides a slope building basement anti structure that floats which characterized in that: including foundation ditch (1), basement body (2) and hydrophobic pipeline structure (3), hydrophobic pipeline structure (3) set up in the below of basement body (2) bottom plate, hydrophobic pipeline structure (3) are linked together with municipal rainwater well, hydrophobic pipeline structure (3) comprise a plurality of bridge type strainer.

2. The anti-floating structure of the basement of the sloping field building as claimed in claim 1, wherein: be provided with blind ditch (5) in the bottom of foundation ditch (1), drain pipe structure (3) are buried underground in blind ditch (5), backfill has filter material (6) in blind ditch (5).

3. The anti-floating structure of the basement of the sloping field building as claimed in claim 1, wherein: the hydrophobic pipeline structure (3) is wrapped by a first non-woven fabric (33), and the filter material (6) is wrapped by a second non-woven fabric (61).

4. The anti-floating structure of the basement of the sloping field building as claimed in claim 1, wherein: hydrophobic pipeline structure (3) include horizontal drain pipe (32) way and horizontal vertical drainage pipe way (31), horizontal drain pipe (32) way and horizontal vertical drainage pipe way (31) are the setting of upper and lower position relation, horizontal drain pipe (32) way sets up in the week side of basement body (2) bottom, horizontal vertical drainage pipe way (31) set up in the bottom of basement body (2).

5. The anti-floating structure of the basement of the sloping field building as claimed in claim 1, wherein: be provided with rib (21) on basement body (2) bottom outer wall, rib (21) encircle basement body (2) outer wall contour and set up the round, rib (21) stretch into in filter material (6).

6. The anti-floating structure of the basement of the sloping field building as claimed in claim 1, wherein: the volume of foundation ditch (1) is greater than the volume of basement body (2), backfill in foundation ditch (1) has stickness soil (4) that cover basement body (2) top and foundation ditch (1) bottom.

7. The anti-floating structure of the basement of the sloping field building as claimed in claim 1, wherein: basement body (2) are provided with bed course (23), the area of bed course (23) is greater than the area that closes of reinforcement (21), each side of bed course (23) all stretches out outside each side of reinforcement (21).

8. The anti-floating structure of the basement of the sloping field building as claimed in claim 1, wherein: the basement filter material is characterized in that a bearing platform (22) integrally formed with the basement body (2) is arranged at the bottom of the basement body (2), the outer wall of the bearing platform (22) is coated by a cushion layer (23), and the lower end of the bearing platform (22) extends out of the filter material (6).

9. A construction method for an anti-floating construction according to any of claims 1-9, characterized by the steps of:

s1, excavating the foundation pit (1), and cleaning and leveling sundries at the bottom of the foundation pit (1);

s2, digging a blind ditch (5) in the bottom of the foundation pit (1), and paving a second non-woven fabric (61) in the blind ditch (5);

s3, installing a hydrophobic pipeline structure (3) in the blind ditch (5), backfilling a filter material (6) after the surface of the hydrophobic pipeline structure (3) is required to be wrapped by a first non-woven fabric (33) and installed, and covering the surface of the filter material (6) with a second non-woven fabric (61);

s4, forming the basement body (2), then backfilling cohesive soil (4) covering the basement body (2) in the foundation pit (1), and tamping the cohesive soil (4) after backfilling.