CN113585292A - Construction process for preventing underground structure from floating when earth is backfilled - Google Patents
Construction process for preventing underground structure from floating when earth is backfilled Download PDFInfo
- Publication number
- CN113585292A CN113585292A CN202110981644.3A CN202110981644A CN113585292A CN 113585292 A CN113585292 A CN 113585292A CN 202110981644 A CN202110981644 A CN 202110981644A CN 113585292 A CN113585292 A CN 113585292A
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- earthwork
- foundation pit
- water
- corrugated pipe
- pipe
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- 238000010276 construction Methods 0.000 title claims abstract description 35
- 238000000034 method Methods 0.000 title claims abstract description 14
- 238000007667 floating Methods 0.000 title claims abstract description 7
- 230000008569 process Effects 0.000 title claims abstract description 6
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 85
- 238000001914 filtration Methods 0.000 claims abstract description 36
- 239000003337 fertilizer Substances 0.000 claims abstract description 31
- 239000010410 layer Substances 0.000 claims abstract description 19
- 239000011241 protective layer Substances 0.000 claims abstract description 10
- 239000011150 reinforced concrete Substances 0.000 claims description 28
- 239000002689 soil Substances 0.000 claims description 15
- 238000009434 installation Methods 0.000 claims description 14
- 230000008520 organization Effects 0.000 claims description 12
- 239000004567 concrete Substances 0.000 claims description 11
- 229910000831 Steel Inorganic materials 0.000 claims description 4
- 238000009412 basement excavation Methods 0.000 claims description 4
- 238000004140 cleaning Methods 0.000 claims description 4
- 238000005516 engineering process Methods 0.000 claims description 4
- 239000010959 steel Substances 0.000 claims description 4
- 238000007796 conventional method Methods 0.000 claims description 3
- 238000007689 inspection Methods 0.000 claims description 3
- 239000004576 sand Substances 0.000 claims description 3
- 239000004575 stone Substances 0.000 claims description 3
- 238000000926 separation method Methods 0.000 abstract description 3
- 238000007599 discharging Methods 0.000 abstract description 2
- 238000013461 design Methods 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 239000003673 groundwater Substances 0.000 description 2
- 238000001556 precipitation Methods 0.000 description 2
- 238000009435 building construction Methods 0.000 description 1
- 238000000151 deposition Methods 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 239000000428 dust Substances 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000002265 prevention Effects 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 238000005086 pumping Methods 0.000 description 1
- 238000004078 waterproofing Methods 0.000 description 1
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Classifications
-
- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D17/00—Excavations; Bordering of excavations; Making embankments
- E02D17/06—Foundation trenches ditches or narrow shafts
- E02D17/12—Back-filling of foundation trenches or ditches
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D35/00—Filtering devices having features not specifically covered by groups B01D24/00 - B01D33/00, or for applications not specifically covered by groups B01D24/00 - B01D33/00; Auxiliary devices for filtration; Filter housing constructions
- B01D35/02—Filters adapted for location in special places, e.g. pipe-lines, pumps, stop-cocks
-
- 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
- E02D31/10—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 soil pressure or hydraulic pressure
- E02D31/12—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 soil pressure or hydraulic pressure against upward hydraulic pressure
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- Engineering & Computer Science (AREA)
- Mining & Mineral Resources (AREA)
- Life Sciences & Earth Sciences (AREA)
- Structural Engineering (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Paleontology (AREA)
- Civil Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Hydrology & Water Resources (AREA)
- Environmental & Geological Engineering (AREA)
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Underground Structures, Protecting, Testing And Restoring Foundations (AREA)
Abstract
The invention discloses a construction process for preventing a subsurface structure from floating upwards during earth backfilling, which is a construction method for discharging underground water permeating into a backfilled fertilizer tank out of a water filtering facility and a water collecting well at the bottom of the fertilizer tank in a mode of embedding firstly and then running, namely completing foundation pit earth, a cushion layer, a leveling layer, a waterproof and protective layer, an underground structure column wall beam plate and a column wall outer waterproof and waterproof protective layer in sequence, and when the underground structure reaches the earth backfilling condition. The method for backfilling the earthwork of the foundation pit fertilizer groove by arranging the water filtering facility solves the problems of difficult separation of land use and traffic in a construction site and discharge of underground water, thereby ensuring that the basement does not float upwards under extreme conditions.
Description
Technical Field
The invention relates to the field of earthwork backfilling, in particular to a construction process which comprises the steps of pre-paving a gravel layer, a water filtering facility, a water collecting well and the like in a fertilizer tank, and then collecting and discharging underground water level permeating into the fertilizer tank through a water filtering device and the water collecting well.
Background
With the development of building construction technology, the technology of underground space is more and more mature, and underground buildings are also larger and larger. Designers often use the weight of the building structure and various counterweights to balance the buoyancy of the underground structure, which is a preferred method of earthing the roof of the underground structure, to achieve the best overall efficiency. The top cover of the underground structure adopts a mode of soil covering, so that the method is economical, and the beautifying and greening work of a production community is utilized.
In the construction stage of the tissue engineering, once the construction of the underground structure is finished, the earth backfill of the foundation pit fertilizer groove is organized so as to solve the difficulties of land occupation and the like of a construction site; after the construction of the above-ground building is completed, earth backfilling is carried out on the top of the underground structure so as to meet the construction requirement of the underground pipe network. As the foundation pit fertilizer groove earthwork is backfilled, the designed earthwork backfilling working condition is not reached, and after underground water is infiltrated into the backfilled foundation pit fertilizer groove, buoyancy can be generated to cause the floating accident of the basement. The problem of land utilization of a construction site is solved through backfilling of the foundation pit fertilizer groove earthwork, and accumulated water permeating into the foundation pit fertilizer groove earthwork is pumped and drained in time, so that the problem cannot be avoided.
On the construction site, the underground structure construction is completed, and the backfill of the fertilizer groove earthwork is often organized in time when the backfill of the fertilizer groove earthwork is met. Because the underground structure beam slab is usually used as a construction site material for stacking, traffic roads, processing areas and the like, and has the objective requirement of dust control, the earthwork backfilling on the top cover of the underground structure is carried out later, the working condition of the designed backfilling is usually a mode of 'foundation pit fertilizer groove earthwork backfilling + underground structure top cover earthwork backfilling', and the anti-floating requirement of the designed underground structure cannot be met only by the fertilizer groove earthwork backfilling; therefore, a construction method which is convenient and practical and can reduce the underground water level in the earthwork of the foundation pit fertilizer groove in time is urgently needed in a construction site.
Patent application publication No. CN 211773801U discloses such a device in a filter tube well for construction of foundation ditch well casing precipitation, set up the filter tube well, and set up the precipitation well in the foundation ditch both sides, form a semi-enclosed structure in the inside of depositing the water pipeline, it can not cause the sedimentary grit of filter tube to take place to swash the in-process when extracting groundwater at it, the grit in the groundwater can not appear and is inhaled and cause the problem of impact damage to high-speed rotatory impeller, but the structure is complicated, use in general earthwork is backfilled, be difficult to improve the efficiency of construction, can not reach convenient, practical effect.
Disclosure of Invention
The invention aims to provide a construction method which is convenient and practical and can reduce the underground water level in the earthwork of a foundation pit fertilizer groove in time.
The technical scheme adopted by the invention is as follows:
the utility model provides a construction technology of lower structure come-up when preventing earthwork backfill which characterized in that: the method comprises the following steps:
step 1: organizing the excavation of the earthwork of the foundation pit according to a conventional method to form a foundation pit bottom elevation line, a foundation pit side slope line and an undisturbed soil elevation line; after the foundation of the foundation pit passes inspection and acceptance, sequentially completing a plain concrete cushion layer, a leveling waterproof protective layer, a reinforced concrete raft plate and a reinforced concrete guide wall vertical to the reinforced concrete raft plate, wherein the guide wall is connected with a water stop steel plate embedded in the raft surface, a reinforced concrete column wall is connected above the guide wall, and a reinforced concrete beam plate is transversely arranged on the reinforced concrete column wall;
step 2: immediately organizing a column wall outer waterproof protective layer on the outer side of the reinforced concrete column wall after the reinforced concrete column wall and beam slab structure of the underground structure is qualified;
and step 3: draining accumulated water in a foundation pit fertilizer tank, cleaning sundries, judging whether earthwork at the bottom of the fertilizer tank is disturbed, and if the earthwork is disturbed, replacing and filling the soil by adopting plain concrete, sand, stone and the like; then paving a gravel water filtering layer and a water filtering facility;
and 4, step 4: a corrugated pipe water collecting well consisting of a corrugated pipe and a plain concrete cushion layer lying below the corrugated pipe is designed every 25 meters or so for the strainer pipe; in order to prevent sundries and the like from falling into the corrugated pipe water collecting well, a water collecting well cover is sleeved at the upper opening of the corrugated pipe;
and 5: backfilling the foundation pit fertilizer groove earthwork of the installation part of the water filtering pipe to the top elevation plane of the underground structure according to the conventional organization;
step 6: backfilling foundation pit soil in a corrugated pipe water collecting well installation position to an underground structure top elevation plane according to the conventional organization, protecting the pipe wall of the corrugated pipe, and preventing sundries from falling into the corrugated pipe water collecting well;
and 7: backfilling earthwork at the installation position of the water filtering facility to a designed elevation plane according to a conventional organization;
and 8: backfilling earthwork at the installation position of the corrugated pipe water collecting well to a designed elevation plane according to a conventional organization, and finally organizing the corrugated pipe water collecting well to be buried.
The water filtering facility comprises a filter pipe, a filter screen coated outside the filter pipe and filter pipe wall holes, and the filter pipe wall holes are uniformly and densely distributed on the filter pipe.
The invention has the advantages that: the method for backfilling the earthwork of the foundation pit fertilizer groove by arranging the water filtering facility solves the problems of difficult separation of land use and traffic in a construction site and discharge of underground water, thereby ensuring that the basement does not float upwards under extreme conditions.
Drawings
The present invention will be described in further detail with reference to the accompanying drawings and specific embodiments.
FIG. 1 is a schematic view of the present invention for completing excavation of foundation pit earth and construction of underground structure;
FIG. 2 is a schematic view of the construction of the present invention to achieve waterproofing of the outer side of the wall column of the underground structure and the protection layer thereof;
FIG. 3 is a schematic view of the installation of the gravel layer and water filtration means of the present invention;
FIG. 4 is a schematic view of the completed installation of the sump according to the present invention;
FIG. 5 is a schematic diagram of the earth backfill of a fertilizer trough above a water filtration facility according to the present invention;
FIG. 6 is a schematic diagram of the earth backfill of a part of the fertilizer grooves of the sump according to the present invention;
FIG. 7 is a schematic view of the construction of the present invention for water filtration facility with earthwork backfilling layer by layer to design conditions;
FIG. 8 is a schematic view of the present invention illustrating a portion of the sump is backfilled with earthwork in layers to a design condition;
FIG. 9 is a schematic view of a strainer, a wall bore and an outer screen of the strainer of the present invention;
fig. 10 is a schematic view of a wall aperture of a water filtration tube of the present invention.
Wherein: 1. marking a high line at the bottom of the foundation pit; 2. a foundation pit side slope line; 3. marking a height line on undisturbed soil; 4. a plain concrete cushion; 5. leveling the waterproof protective layer; 6. reinforced concrete raft plates; 7. a reinforced concrete guide wall; 8. a reinforced concrete column wall; 9. a reinforced concrete beam slab; 10. a water stop steel plate; 11. waterproof protective layer outside the column wall; 12. a water filtration facility; 12-1, a filter pipe; 12-2, wrapping a filter screen outside the filter pipe; 12-3, filtering pipe wall holes; 13. gravel water filtering layer; 14. a water-collecting underground concrete cushion; 15. a bellows sump; 16. a water collecting well cover plate.
Detailed Description
As shown in fig. 1 to 10, a construction process for preventing a substructure from floating upward when earth is backfilled includes the steps of:
step 1: organizing foundation pit earthwork excavation according to a conventional method to form a foundation pit bottom elevation line 1, a foundation pit side slope line 2 and an undisturbed soil elevation line 3; after the foundation of the foundation pit passes inspection and acceptance, sequentially completing a plain concrete cushion layer 4, a leveling waterproof protective layer 5, a reinforced concrete raft 6, a reinforced concrete guide wall 7 vertical to the reinforced concrete raft 6, the guide wall being connected with a water stop steel plate 10 embedded in the raft surface, a reinforced concrete column wall 8 connected above the guide wall, and a reinforced concrete beam plate 9 transversely arranged on the reinforced concrete column wall 8;
step 2: immediately organizing a column wall outer waterproof protective layer 11 on the outer side of the reinforced concrete column wall after the reinforced concrete column wall and beam slab structure of the underground structure is qualified;
and step 3: draining accumulated water in a foundation pit fertilizer tank, cleaning sundries, judging whether earthwork at the bottom of the fertilizer tank is disturbed, and if the earthwork is disturbed, replacing and filling the soil by adopting plain concrete, sand, stone and the like; paving a gravel water filtering layer 13 and a water filtering facility 12, wherein the water filtering facility 12 comprises a strainer 12-1, a strainer 12-2 wrapped outside the strainer and strainer wall holes 12-3, and the strainer wall holes 12-3 are uniformly and densely distributed on the strainer 12-1;
and 4, step 4: a corrugated pipe water collecting well 15 which is composed of a corrugated pipe and a plain concrete cushion layer lying below the corrugated pipe is designed every 25 meters on the strainer 12-1; in order to prevent sundries and the like from falling into the corrugated pipe water collecting well 15, a water collecting well cover 16 is sleeved at the upper opening of the corrugated pipe;
and 5: backfilling the earthwork of the foundation pit fertilizer groove at the installation part of the water filtering pipe 12-1 to the top elevation plane of the underground structure according to the conventional organization, and facilitating the planning and use of construction land on a construction site;
step 6: backfilling foundation pit soil in the installation position of the corrugated pipe water collecting well 15 to the top elevation plane of the underground structure according to the conventional organization, protecting the pipe wall of the corrugated pipe, preventing sundries from falling into the corrugated pipe water collecting well 15, and facilitating planning and use of construction land on a construction site;
and 7: backfilling earthwork at the installation position of the water filtering facility 12 to a designed elevation plane according to a conventional organization, so as to facilitate use in a construction site;
and 8: and backfilling earthwork at the installation position of the corrugated pipe water collecting well 15 to a designed elevation plane according to the conventional organization, and finally organizing the corrugated pipe water collecting well 15 to be buried, so that the corrugated pipe water collecting well is convenient to use on a construction site.
Before earthwork backfilling, a gravel water filtering layer and a water filtering facility are paved besides cleaning sundries in a fertilizer groove and pumping accumulated water, wherein the water filtering facility comprises a water filtering pipe, a filter screen coated outside the water filtering pipe and wall holes of the water filtering pipe, and a water collecting well is designed at intervals along the direction of the water filtering pipe.
When the earthwork above the filter pipe is backfilled, the filter pipe must be subjected to damage prevention operation, and the strength must be controlled in real time of earthwork tamping to prevent damage to the filter pipe and a water collecting well.
After the filter pipes are installed and the water collecting well is installed in place, virtual pure soil is paved for about 250 mm, and the pure soil is tamped according to requirements; then virtually paving pure soil for about 250 mm, and compacting according to requirements; and backfilling until the upper part of the water filtering pipe is more than 600 mm, and then, backfilling the soil in the fertilizer groove according to the traditional mode. Note that: when the earthwork around the water collecting well is backfilled, the tamping operation must be paid attention to prevent the water collecting well from being damaged or causing the water collecting well to incline.
The method for backfilling the earthwork of the foundation pit fertilizer groove by arranging the water filtering facility solves the problems of difficult separation of land use and traffic in a construction site and discharge of underground water, thereby ensuring that the basement does not float upwards under extreme conditions.
The above-mentioned embodiments are merely illustrative of the preferred embodiments of the present invention, and do not limit the scope of the present invention, and various modifications and improvements made to the technical solution of the present invention by those skilled in the art without departing from the spirit of the present invention should be included in the protection scope defined by the claims of the present invention.
Claims (2)
1. The utility model provides a construction technology of lower structure come-up when preventing earthwork backfill which characterized in that: the method comprises the following steps:
step 1: organizing the excavation of the earthwork of the foundation pit according to a conventional method to form a foundation pit bottom elevation line, a foundation pit side slope line and an undisturbed soil elevation line; after the foundation of the foundation pit passes inspection and acceptance, sequentially completing a plain concrete cushion layer, a leveling waterproof protective layer, a reinforced concrete raft plate and a reinforced concrete guide wall vertical to the reinforced concrete raft plate, wherein the guide wall is connected with a water stop steel plate embedded in the raft surface, a reinforced concrete column wall is connected above the guide wall, and a reinforced concrete beam plate is transversely arranged on the reinforced concrete column wall;
step 2: immediately organizing a column wall outer waterproof protective layer on the outer side of the reinforced concrete column wall after the reinforced concrete column wall and beam slab structure of the underground structure is qualified;
and step 3: draining accumulated water in a foundation pit fertilizer tank, cleaning sundries, judging whether earthwork at the bottom of the fertilizer tank is disturbed, and if the earthwork is disturbed, replacing and filling the soil by adopting plain concrete, sand, stone and the like; then paving a gravel water filtering layer and a water filtering facility;
and 4, step 4: a corrugated pipe water collecting well consisting of a corrugated pipe and a plain concrete cushion layer lying below the corrugated pipe is designed every 25 meters or so for the strainer pipe; in order to prevent sundries and the like from falling into the corrugated pipe water collecting well, a water collecting well cover is sleeved at the upper opening of the corrugated pipe;
and 5: backfilling the foundation pit fertilizer groove earthwork of the installation part of the water filtering pipe to the top elevation plane of the underground structure according to the conventional organization;
step 6: backfilling foundation pit soil in a corrugated pipe water collecting well installation position to an underground structure top elevation plane according to the conventional organization, protecting the pipe wall of the corrugated pipe, and preventing sundries from falling into the corrugated pipe water collecting well;
and 7: backfilling earthwork at the installation position of the water filtering facility to a designed elevation plane according to a conventional organization;
and 8: backfilling earthwork at the installation position of the corrugated pipe water collecting well to a designed elevation plane according to a conventional organization, and finally organizing the corrugated pipe water collecting well to be buried.
2. The construction process for preventing the underground structure from floating up when earth is backfilled according to claim 1, which is characterized in that: the water filtering facility comprises a filter pipe, a filter screen coated outside the filter pipe and filter pipe wall holes, and the filter pipe wall holes are uniformly and densely distributed on the filter pipe.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110981644.3A CN113585292A (en) | 2021-08-25 | 2021-08-25 | Construction process for preventing underground structure from floating when earth is backfilled |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110981644.3A CN113585292A (en) | 2021-08-25 | 2021-08-25 | Construction process for preventing underground structure from floating when earth is backfilled |
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| CN113585292A true CN113585292A (en) | 2021-11-02 |
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| CN202110981644.3A Pending CN113585292A (en) | 2021-08-25 | 2021-08-25 | Construction process for preventing underground structure from floating when earth is backfilled |
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Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR101612521B1 (en) * | 2015-10-12 | 2016-04-14 | 우경기술주식회사 | Method for constructing underground structures restraining transformation and using external wall |
| CN207017319U (en) * | 2017-08-02 | 2018-02-16 | 成都市建筑设计研究院 | A kind of waterproof construction of waterproof or weak permeable place building foundation pit |
| CN108625402A (en) * | 2017-03-24 | 2018-10-09 | 中国二十冶集团有限公司 | Foundation pit fertilizer slot ponding processing method |
| CN110004935A (en) * | 2019-04-22 | 2019-07-12 | 上海建工一建集团有限公司 | A kind of locally deep pit drain measure trench system and construction method |
| CN110886327A (en) * | 2019-11-07 | 2020-03-17 | 广州市设计院 | Basement structure decompression anti-floating system based on slope area and construction method thereof |
| CN112127390A (en) * | 2020-09-03 | 2020-12-25 | 江苏南通三建集团股份有限公司 | Construction process for simply plugging outer wall reserved sleeve in underground structural area |
-
2021
- 2021-08-25 CN CN202110981644.3A patent/CN113585292A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR101612521B1 (en) * | 2015-10-12 | 2016-04-14 | 우경기술주식회사 | Method for constructing underground structures restraining transformation and using external wall |
| CN108625402A (en) * | 2017-03-24 | 2018-10-09 | 中国二十冶集团有限公司 | Foundation pit fertilizer slot ponding processing method |
| CN207017319U (en) * | 2017-08-02 | 2018-02-16 | 成都市建筑设计研究院 | A kind of waterproof construction of waterproof or weak permeable place building foundation pit |
| CN110004935A (en) * | 2019-04-22 | 2019-07-12 | 上海建工一建集团有限公司 | A kind of locally deep pit drain measure trench system and construction method |
| CN110886327A (en) * | 2019-11-07 | 2020-03-17 | 广州市设计院 | Basement structure decompression anti-floating system based on slope area and construction method thereof |
| CN112127390A (en) * | 2020-09-03 | 2020-12-25 | 江苏南通三建集团股份有限公司 | Construction process for simply plugging outer wall reserved sleeve in underground structural area |
Non-Patent Citations (1)
| Title |
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| 张林强: "地下室土方提前回填与抗浮技术探讨", 《福建建材》 * |
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Application publication date: 20211102 |
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