CN115305951B - Construction method for preventing backfill from settling and water accumulation under overhanging structure - Google Patents
Construction method for preventing backfill from settling and water accumulation under overhanging structure Download PDFInfo
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- CN115305951B CN115305951B CN202211243526.3A CN202211243526A CN115305951B CN 115305951 B CN115305951 B CN 115305951B CN 202211243526 A CN202211243526 A CN 202211243526A CN 115305951 B CN115305951 B CN 115305951B
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D29/00—Independent underground or underwater structures; Retaining walls
- E02D29/02—Retaining or protecting walls
- E02D29/025—Retaining or protecting walls made up of similar modular elements stacked without mortar
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D31/00—Protective arrangements for foundations or foundation structures; Ground foundation measures for protecting the soil or the subsoil water, e.g. preventing or counteracting oil pollution
- E02D31/02—Protective arrangements for foundations or foundation structures; Ground foundation measures for protecting the soil or the subsoil water, e.g. preventing or counteracting oil pollution against ground humidity or ground water
Abstract
The invention provides a backfill anti-settling and anti-water-accumulation construction method under an overhanging structure, and relates to the technical field of backfilling. The method comprises the following steps: and erecting the through-wall pipeline to a preset position. And constructing a first waterproof layer on the garage top plate and the outer wall of the structure, and respectively constructing a plane waterproof protective layer and a vertical surface heat insulation layer on the first waterproof layer. And constructing a slope finding layer on the garage top plate below the cantilever structure, wherein one end of the slope finding layer is tightly attached to the vertical surface heat insulation layer. And constructing a retaining wall and a counterfort at the position close to the other end of the slope finding layer under the end part of the cantilever structure, reserving a reserved hole at the bottom of the retaining wall, and constructing a reverse filter bag on the inner side of the retaining wall. And constructing a second waterproof layer and a waterproof protective layer on the outer wall of the retaining wall. The drainage blanket is under construction on the plane waterproof layer that is located the retaining wall outside, and the drainage blanket tip stretches into in the reservation entrance to a cave. And performing backfilling construction on the drainage layer. The method effectively solves the problems of backfill settlement and water accumulation under the cantilever structure, and improves the construction quality.
Description
Technical Field
The invention relates to the technical field of backfilling, in particular to a backfill anti-sedimentation and anti-ponding construction method under a cantilever structure.
Background
In the field of building engineering, particularly in housing construction projects such as houses and the like, basements are built around residential buildings in order to increase the number of parking spaces and meet the requirements of civil air defense facilities. Meanwhile, in order to meet the requirements of greening and the like in a community, a large amount of backfilling construction can be carried out on the garage top plate, and the living and leisure requirements of people are met. The height of the backfill soil is relatively high due to the requirement of the planting depth of trees and the like. During the backfill soil construction, the compaction degree requirement of the backfill soil can be met by adopting manual matching of a tamping machine, and the problems of garden damage and the like caused by subsequent settlement are reduced. Due to functional requirements, structures such as a first layer of balcony are cantilevered on a garage top plate, and backfill soil elevation can be tightly attached to the underside of the overhanging structures such as the first layer of balcony, so that the backfill soil on the lower portion of the structure can not reach the design compactness, subsequent ground collapse is easily caused, an embedded pipeline is displaced or even damaged, water is accumulated on the lower portion of the balcony, and the like.
Generally, when backfilling construction is carried out on a top plate and an outer wall part of a ground structure, a plane adopts a form of a waterproof layer, a protective layer and a hydrophobic plate, a vertical surface adopts a form of a waterproof layer, a heat preservation layer and a protective brick wall, some projects save cost, even cancel the protective brick wall, and the heat preservation layer replaces a part of protection functions, but if the backfilling sinks, the heat preservation layer is easy to fall off, so that the waterproof layer is damaged, and leakage is generated. Due to the existence of the overhanging structures such as the balcony and the like at the first layer, the actual backfilling height and the compaction degree at the lower part of the balcony are far lower than the designed backfilling height and the designed compaction degree, and the soil covering height is far lower than the designed backfilling height after settlement. Not only can cause the influence to the interior pipeline of backfilling, but also can influence the road, the drainage of scattered water and gardens, thereby influencing the construction quality.
Disclosure of Invention
In view of the above, the present invention provides a construction method for preventing backfill soil from settling and seeping under an overhanging structure, so as to solve the above problems.
Based on the aim, the invention provides a backfill anti-sedimentation anti-ponding construction method under an overhanging structure, wherein the overhanging structure is connected to the outer wall of the structure, and a garage top plate is arranged below the overhanging structure; the method comprises the following steps:
s1, erecting the through-wall pipeline to a preset position.
S2, constructing a first waterproof layer on the garage top plate and the outer wall of the structure, and constructing a plane waterproof protective layer and a vertical surface heat insulation layer on the first waterproof layer respectively.
And S3, constructing a slope finding layer on the garage top plate below the cantilever structure, wherein one end of the slope finding layer is tightly attached to the vertical surface heat insulation layer.
S4, constructing a retaining wall and a counterfort at the position close to the other end of the slope finding layer under the end part of the cantilever structure, reserving a reserved hole at the bottom of the retaining wall, and constructing an anti-filter bag on the inner side of the retaining wall.
And S5, constructing a second waterproof layer and a waterproof protective layer on the outer wall of the retaining wall.
S6, constructing a drainage layer on the plane waterproof protective layer positioned on the outer side of the retaining wall, wherein the end part of the drainage layer extends into the reserved hole.
And S7, performing backfill construction on the drainage layer.
Compared with the prior art, the invention has the beneficial effects that: the protection brick wall is changed into the retaining wall by moving outwards, so that the backfill soil construction at the lower part of the cantilever structure is avoided, the problem that the backfill soil below the cantilever structure is difficult to tamp is solved, and the subsidence of the backfill soil is prevented. Through increase between retaining wall and structure outer wall and look for the slope layer, stretch into the drainage blanket to retaining wall bottom reserve in the entrance to a cave and at measures such as the anti-package of straining of retaining wall bottom construction, prevent structure lower part ponding of encorbelmenting, avoid outside ponding to recharge. Therefore, the method effectively solves the problems of backfill settlement and water accumulation under the cantilever structure, prolongs the service life of the structure and the retaining wall, and improves the construction quality.
Further, the specific steps of S1 include: connecting one end of a suspender to the bottom of the cantilever structure, connecting a wall-through pipeline with the other end of the suspender, extending one end of the wall-through pipeline to the inner side of the outer wall of the structure, and extending the other end of the wall-through pipeline to the end part of the cantilever structure; through the jib increased the stability of wall pipeline, prevented the disturbance and destroyed.
Further, the specific step of S2 includes: laying a first waterproof layer closely to the garage top plate and the outer wall of the structure, and fixing the top end of the first waterproof layer on the outer wall of the structure; laying a plane waterproof protective layer on a first waterproof layer positioned on a garage top plate; and adhering a heat-insulating layer on the first waterproof layer positioned on the outer wall of the structural outer wall through adhesive mortar.
Further, S2 further includes: fully hanging a steel wire mesh on the outer wall of the heat insulation layer, fixing the top end of the steel wire mesh on the outer wall of the structure higher than the top end of the first waterproof layer, and covering the steel wire mesh with anti-crack mortar; the firmness of the heat-insulating layer is enhanced by adding the steel wire mesh and the anti-crack mortar.
Further, the specific step of S4 includes: when the building height of the retaining wall and the counterfort reaches one third of the whole building height, constructing a reverse filter bag along the slope-finding layer and the internal corner of the retaining wall; continuously building the retaining wall and the buttress until a 50mm gap is reserved between the top surface of the retaining wall and the overhanging structure; and after the retaining wall and the counterfort settle stably, plugging the gap by using dry and hard mortar.
Further, the concrete steps of constructing the reverse filter bag along the slope finding layer and the internal corner of the retaining wall comprise: paving a layer of coarse gravel or broken stone along the slope-finding layer and the internal corner of the retaining wall; laying a layer of gravel or stone chips on the coarse gravel or broken stone; and laying a layer of geotextile on the gravel or the stone chips, and fixing the edges of the geotextile on the retaining wall and the slope layer.
Further, the specific step of S5 includes: plastering mortar on the outer wall of the retaining wall to form a waterproof layer base layer; plugging the internal corner positions of the outer wall of the retaining wall and the wall-penetrating pipeline by using a self-adhesive waterproof coiled material, and constructing a second waterproof layer on the waterproof layer base layer and the self-adhesive waterproof coiled material; and constructing a waterproof protective layer on the second waterproof layer.
Further, S6 further includes: clay is adopted to seal the intersected internal corner of the retaining wall and the drainage layer; through increasing the clay back cover, avoid outside water to pass through retaining wall and connect the gap recharge.
Drawings
FIG. 1 is a schematic diagram of a conventional casing settlement method;
FIG. 2 is a schematic view of a backfill anti-settling and anti-water-accumulation construction method under the cantilever structure provided by the embodiment of the invention;
fig. 3 is a schematic view of an inverted filter bag of the backfill anti-settling and anti-water-accumulation construction method under the cantilever structure provided by the embodiment of the invention.
Labeled in the figure as: 1. a first waterproof layer; 2. a facade heat insulation layer; 3. steel wire mesh; 4. anti-crack mortar; 5. a planar waterproof protective layer; 6. finding a slope layer; 7. a boom; 8. a retaining wall; 9. a buttress; 10. performing reverse filtration; 11. coarse gravel or crushed stone; 12. gravel or stone chips; 13. geotextile; 14. a drainage layer; 15. steel nails; 16. fixing a pressing strip; 17. dry and hard mortar; 18. a waterproof layer base layer; 19. a second waterproof layer; 20. a waterproof protective layer; 21. self-adhesive waterproof coiled material; 22. a pipeline joint; 23. clay; 24. reserving a hole; 25. a through-wall pipeline; 26. covering soil; 27. a cantilever structure; 28. a garage roof; 29. actual backfill height; 30. and designing the backfill height.
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 specific embodiments below.
As shown in fig. 1 to 2, an overhanging structure 27 is connected to an outer wall of the structure, and a garage roof 28 is disposed below the overhanging structure 27. In the traditional backfill construction process, a waterproof layer, a heat insulation layer and a protective brick wall are sequentially constructed on the outer wall of the structure in a clinging mode, the waterproof layer, the waterproof protection layer 20 and the drainage layer 14 are sequentially constructed on the garage top plate 28, backfill construction is carried out above the drainage layer 14, and backfill soil is tamped by utilizing a tamping machine. However, due to the blocking of the cantilever structure 27, it is difficult to tamp the casing 26 below the cantilever structure 27, so that the casing 26 below the cantilever structure 27 cannot reach a preset compaction degree, and is easy to settle, and the actual backfill height 29 below the cantilever structure 27 is lower than the designed backfill height 30. In order to solve the above problems, the present invention provides a construction method for preventing backfill soil from settling and water accumulation under the cantilever structure 27, and the following describes the technical solution of the specific embodiment of the present application.
The invention provides a backfill anti-sedimentation and anti-waterlogging construction method under an overhanging structure 27, which is carried out according to the following steps:
s1, one end of the suspender 7 is connected to the bottom of the cantilever structure 27, and the wall-through pipeline 25 is connected with the other end of the suspender 7. One end of the wall-through pipe money extends into the inner side of the outer wall of the structure, the other end of the wall-through pipeline 25 extends out of the end part of the cantilever structure 27, and the wall-through pipeline 25 is erected to a preset position. The end of the through-wall pipeline 25 is connected with the external pipeline through the pipeline joint 22, and the through-wall pipeline 25 has no interface under the cantilever structure 27, so that leakage maintenance is avoided.
S2, paving a first waterproof layer 1 close to the garage top plate 28 and the outer wall of the structure, and generally selecting a waterproof roll material as the first waterproof layer 1. And the top end of the first waterproof layer 1 is fixed on the structural outer wall by adopting a closing-up fixing pressing strip 16. And laying a plane waterproof protective layer 5 on the first waterproof layer 1 positioned on the garage top plate 28. And adhering a heat-insulating layer on the first waterproof layer 1 positioned on the outer wall of the structural outer wall through adhesive mortar. Hang full wire net 3 on the heat preservation outer wall, fix the top of wire net 3 on the structure outer wall that is higher than 1 top of first waterproof layer through steel nail 15, one end length is reserved to the bottom of wire net 3, fixes when looking for slope layer 6 through follow-up construction. The steel wire mesh 3 is covered by the anti-crack mortar 4, and the steel wire mesh 3 is tightly pressed by the anti-crack mortar 4, so that the stability of the heat insulation layer is ensured.
S3, constructing a slope finding layer 6 on the garage top plate 28 below the cantilever structure 27, wherein one end of the slope finding layer 6 is tightly attached to the vertical surface heat preservation layer 2, and the bottom end of the steel wire mesh 3 is tightly pressed.
S4, constructing the retaining wall 8 and the buttress 9 at a position tightly attached to the other end of the slope finding layer 6 under the end part of the cantilever structure 27, wherein one end, close to the retaining wall 8, of the slope finding layer 6 is lower than one end, close to the outer wall of the structure, of the slope finding layer 6, so that drainage is facilitated. A plurality of reserved holes 24 are reserved at the bottom of the retaining wall 8 for draining water. When the building height of the retaining wall 8 and the counterfort 9 reaches one third of the whole building height, as shown in fig. 3, a layer of gravels or gravels 11 is laid along the internal corners of the slope layer 6 and the retaining wall 8, a layer of gravels or stone chips 12 is laid on the gravels or the gravels 11, a layer of geotextile 13 is laid on the gravels or the stone chips 12, and the edges of the geotextile 13 are fixed on the retaining wall 8 and the slope layer 6. After the construction of the reverse filter bag 10 is completed, the retaining wall 8 and the buttress wall 9 are continuously built until a 50mm gap is left between the top surface of the retaining wall 8 and the cantilever structure 27. After the retaining wall 8 and the buttress 9 settle and stabilize, the gap is blocked by using the dry and hard mortar 17.
And S5, plastering mortar on the outer wall of the retaining wall 8 to form a waterproof layer base layer 18, and filling the periphery of the through-wall pipeline 25 with the mortar to be compact. And (3) plugging the external wall of the retaining wall 8 and the internal corner position of the wall-through pipeline 25 by using the self-adhesive waterproof coiled material 21, and constructing a second waterproof layer 19 on the waterproof layer base layer 18 and the self-adhesive waterproof coiled material 21. The self-adhesive waterproof roll 21 is made of butyl waterproof pouring strips, and the second waterproof layer 19 is made of waterproof paint such as polyurethane. The waterproof protective layer 20 is formed on the second waterproof layer 19 by using plastering mortar, and if the area of the waterproof protective layer 20 is large, the mesh cloth can be pressed in when the waterproof protective layer 20 is formed, so that the waterproof protective layer 20 is prevented from cracking.
And S6, constructing a drainage layer 14 on the plane waterproof protective layer 5 positioned outside the retaining wall 8, preferably adopting the drainage layer 14 with siphon effect. The end part of the drainage layer 14 extends into the reserved hole 24, and clay 23 is adopted to seal the intersecting internal corner of the retaining wall 8 and the drainage layer 14.
And S7, backfilling on the drainage layer 14, and compacting the covering soil 26 by using a compaction machine to finish the backfilling construction.
The embodiments of the invention are intended to embrace all such alternatives, modifications and variances that fall within the broad scope of the appended claims. Therefore, any omissions, modifications, substitutions, improvements and the like that may be made without departing from the spirit and principles of the invention are intended to be included within the scope of the invention.
Claims (5)
1. A backfill anti-sedimentation and anti-water-accumulation construction method under an overhanging structure is characterized in that the overhanging structure is connected to the outer wall of the structure, and a garage top plate is arranged below the overhanging structure; the method is characterized by comprising the following steps:
s1, erecting a through-wall pipeline to a preset position;
s2, laying a first waterproof layer close to the garage top plate and the outer wall of the structure, and fixing the top end of the first waterproof layer on the outer wall of the structure; laying a plane waterproof protective layer on a first waterproof layer positioned on a garage top plate; adhering a heat-insulating layer on a first waterproof layer positioned on the outer wall of the structure through adhesive mortar;
s3, constructing a slope layer on the plane waterproof protective layer below the cantilever structure, wherein one end of the slope layer is tightly attached to the vertical surface heat insulation layer;
s4, constructing a retaining wall and a counterfort on the plane waterproof protective layer right below the end part of the cantilever structure, wherein the retaining wall and the counterfort are tightly attached to the other end of the slope finding layer, a reserved hole is reserved at the bottom of the retaining wall, and a reverse filter bag is constructed on the inner side of the retaining wall;
the method comprises the following specific steps: when the building height of the retaining wall and the counterfort reaches one third of the whole building height, constructing a reverse filter bag along the slope-finding layer and the internal corner of the retaining wall; continuously building the retaining wall and the buttress until a 50mm gap is reserved between the top surface of the retaining wall and the overhanging structure; after the retaining wall and the counterfort settle stably, plugging the gap by using dry and hard mortar;
wherein, the concrete step along the construction of looking for slope layer and retaining wall reentrant corner department and turning over the package of straining includes: paving a layer of coarse gravel or broken stone along the slope-finding layer and the internal corner of the retaining wall; laying a layer of gravel or stone chips on the coarse gravel or broken stone; laying a layer of geotextile on the gravel or the stone chips, wherein the edges of the geotextile are fixed on the retaining wall and the slope layer;
s5, constructing a second waterproof layer and a waterproof protective layer on the outer wall of the retaining wall;
s6, constructing a drainage layer on the plane waterproof protective layer positioned on the outer side of the retaining wall, wherein the end part of the drainage layer extends into the reserved hole;
and S7, performing backfill construction on the drainage layer.
2. The backfill anti-settling and anti-water-accumulation construction method under the cantilever structure according to claim 1, wherein the specific steps of S1 comprise: one end of the suspender is connected to the bottom of the cantilever structure, the wall-penetrating pipeline is connected with the other end of the suspender, one end of the wall-penetrating pipeline extends into the inner side of the outer wall of the structure, and the other end of the wall-penetrating pipeline extends out of the end part of the cantilever structure.
3. The backfill anti-settling and anti-water-accumulation construction method under the cantilever structure according to claim 1, wherein the S2 further comprises: and hanging a steel wire mesh on the outer wall of the heat insulation layer, fixing the top end of the steel wire mesh on the outer wall of the structure higher than the top end of the first waterproof layer, and covering the steel wire mesh with anti-crack mortar.
4. The backfill anti-settling anti-ponding construction method under the cantilever structure according to claim 1, wherein the specific steps of S5 comprise:
plastering mortar on the outer wall of the retaining wall to form a waterproof layer base layer;
plugging the internal corner positions of the outer wall of the retaining wall and the wall-penetrating pipeline by using a self-adhesive waterproof coiled material, and constructing a second waterproof layer on the waterproof layer base layer and the self-adhesive waterproof coiled material;
and constructing a waterproof protective layer on the second waterproof layer.
5. The backfill anti-settling and anti-water-accumulation construction method under the cantilever structure according to claim 1, wherein S6 further comprises: and sealing the crossed internal corner of the retaining wall and the drainage layer by adopting clay.
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| CN115305951B true CN115305951B (en) | 2023-01-10 |
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