CN110820720A - Water-blocking and drainage-resisting anti-floating construction structure and method - Google Patents
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- 238000010276 construction Methods 0.000 title claims abstract description 66
- 238000007667 floating Methods 0.000 title claims abstract description 27
- 238000000034 method Methods 0.000 title claims abstract description 11
- 239000010410 layer Substances 0.000 claims abstract description 132
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 72
- 239000002689 soil Substances 0.000 claims abstract description 49
- 239000004575 stone Substances 0.000 claims abstract description 41
- 239000003337 fertilizer Substances 0.000 claims abstract description 38
- 239000011241 protective layer Substances 0.000 claims abstract description 24
- 239000012530 fluid Substances 0.000 claims abstract description 17
- 239000004746 geotextile Substances 0.000 claims description 8
- 238000001914 filtration Methods 0.000 abstract description 13
- 239000003673 groundwater Substances 0.000 abstract description 6
- 238000007711 solidification Methods 0.000 abstract description 5
- 230000008023 solidification Effects 0.000 abstract description 5
- 230000006837 decompression Effects 0.000 abstract description 4
- 230000000694 effects Effects 0.000 abstract description 4
- 230000009467 reduction Effects 0.000 abstract description 4
- 230000008569 process Effects 0.000 description 5
- 230000007547 defect Effects 0.000 description 3
- 238000001035 drying Methods 0.000 description 3
- 239000011435 rock Substances 0.000 description 3
- 238000005056 compaction Methods 0.000 description 2
- 239000012535 impurity Substances 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 239000012466 permeate Substances 0.000 description 2
- 238000005096 rolling process Methods 0.000 description 2
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 1
- 239000000654 additive Substances 0.000 description 1
- PNEYBMLMFCGWSK-UHFFFAOYSA-N aluminium oxide Inorganic materials [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 description 1
- 238000004873 anchoring Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000009435 building construction Methods 0.000 description 1
- BRPQOXSCLDDYGP-UHFFFAOYSA-N calcium oxide Chemical compound [O-2].[Ca+2] BRPQOXSCLDDYGP-UHFFFAOYSA-N 0.000 description 1
- ODINCKMPIJJUCX-UHFFFAOYSA-N calcium oxide Inorganic materials [Ca]=O ODINCKMPIJJUCX-UHFFFAOYSA-N 0.000 description 1
- 239000000292 calcium oxide Substances 0.000 description 1
- 239000003795 chemical substances by application Substances 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000003631 expected effect Effects 0.000 description 1
- 239000004744 fabric Substances 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
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- 238000003908 quality control method Methods 0.000 description 1
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- 238000011160 research Methods 0.000 description 1
- 229910052814 silicon oxide Inorganic materials 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D3/00—Improving or preserving soil or rock, e.g. preserving permafrost soil
- E02D3/02—Improving by compacting
- E02D3/10—Improving by compacting by watering, draining, de-aerating or blasting, e.g. by installing sand or wick drains
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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
- E02D31/10—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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- General Life Sciences & Earth Sciences (AREA)
- Mining & Mineral Resources (AREA)
- Civil Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Environmental & Geological Engineering (AREA)
- Hydrology & Water Resources (AREA)
- Agronomy & Crop Science (AREA)
- Soil Sciences (AREA)
- Underground Structures, Protecting, Testing And Restoring Foundations (AREA)
Abstract
The invention relates to the technical field of constructional engineering, in particular to a water-blocking and draining anti-floating construction structure; the adopted technical scheme is as follows: a water-drainage-resistant anti-floating construction structure comprises a plain concrete layer, wherein the plain concrete layer is laid at the bottom of a fertilizer tank; a protective layer, a graded crushed stone layer and a fluid state solidified soil layer are sequentially paved on the plain concrete layer; and a water filtering pipe is embedded in the graded broken stone layer and provided with a plurality of water inlet holes, and the water filtering pipe is used for leading water in the fertilizer tank out of the fertilizer tank. The invention can cut off the connection between the water seepage on the earth surface and the underground water so as to prevent the water pressure of the underground water from increasing. Simultaneously, lay the level and join in marriage the metalling between protective layer and flow state solidification layer to bury the strainer in the level and join in marriage the metalling underground, discharge after filtering the groundwater that oozes and upwelling in order to be subsurface, thereby release the underground foundation buoyancy of building, the buoyancy of great reduction underground foundation plays the effect of anti superficial decompression. The method has the characteristics of low construction cost and short construction period.
Description
Technical Field
The invention relates to the technical field of constructional engineering, in particular to a water-blocking and draining anti-floating construction structure and a method.
Background
The construction quality of the foundation is greatly influenced by the backfill construction of the construction project. According to related researches, the ground collapse caused by the defect of backfill construction quality in the construction of building construction project accounts for about 90 percent of the ground collapse. The condition that the quality control of backfill soil is not tight generally exists in the backfill soil construction of the building engineering, so that the water content, the dry density and the like in a soil layer after the backfill soil construction do not meet the standards, and rubber soil is easily formed after filling. In addition, in project backfill construction operation, due to the fact that a matched tamping mode is lacked or effective equipment cannot be used for tamping in a large number of narrow areas, surface leveling and tamping are carried out after one-time loose filling during construction, so that backfill does not meet related design requirements after the project backfill construction operation is completed, great difficulty is brought to subsequent leveling and modification, the problems are not solved well, and a large amount of manual tamping and long technical intermittence time are consumed.
In addition, partial projects are often hidden troubles for structural quality and safety due to overlarge buoyancy because of abundant underground water. Aiming at the problems, the construction mode adopted in large quantity is anti-floating anchor rod construction, the anti-floating anchor rod is required to be anchored in a hard rock body and is not suitable for soft rock and soil body, and the damage is usually the damage of the anchored rock body; because the local anchor rods are dense, the anchor rod construction is inconvenient; the reinforcing bars of the bottom plate and the beam plate of the basement are large. Therefore, the anti-floating anchor rod has the defects of complex construction process, high construction cost input, long construction period and the like, and the construction process cannot achieve the expected effect in construction projects with short construction periods.
Disclosure of Invention
Aiming at the technical problems of complex backfilling construction process, high investment, long engineering period and large underground water buoyancy borne by a building in the existing constructional engineering project, the invention provides the water-blocking and water-draining anti-floating construction structure and the construction method, which can reduce the anti-seepage and anti-floating pressure of the basement water-resisting plate and have the characteristics of simple construction, short construction period, low manufacturing cost, small anti-floating pressure and high safety coefficient of the engineering structure.
The invention is realized by the following technical scheme:
a water-drainage-resistant anti-floating construction structure comprises a plain concrete layer, wherein the plain concrete layer is laid at the bottom of a fertilizer tank; a protective layer, a graded crushed stone layer and a fluid state solidified soil layer are sequentially paved on the plain concrete layer; and a water filtering pipe is embedded in the graded broken stone layer and provided with a plurality of water inlet holes, and the water filtering pipe is used for leading water in the fertilizer tank out of the fertilizer tank.
The invention cuts off the connection between the water seepage on the earth surface and the underground water through the plain concrete layer, the protective layer and the fluid state solidified soil layer so as to prevent the water pressure of the underground water from increasing. Simultaneously, lay the level and join in marriage the metalling between protective layer and flow state solidification layer to bury the strainer in the level and join in marriage the metalling underground, discharge after filtering the groundwater that oozes and upwelling in order to be subsurface, thereby release the underground foundation buoyancy of building, the buoyancy of great reduction underground foundation plays the effect of anti superficial decompression.
As a specific embodiment of the graded crushed stone layer, the graded crushed stone layer comprises a first-stage crushed stone layer and a second-stage crushed stone layer, and the strainer is positioned between the first-stage crushed stone layer and the second-stage crushed stone layer. On the one hand, the construction of burying underground of strainer is convenient for, on the other hand can ensure that the upper and lower both sides of strainer all have sufficient gradation rubble to the impurity filtering of the water in the structure will permeate.
As a specific embodiment of the protective layer, the protective layer comprises a concrete layer, and a waterproof layer is laid on the concrete layer.
Furthermore, a geotextile layer is laid between the graded gravel layer and the flow state solidified soil layer to prevent the groundwater from surging to the flow state solidified soil layer and prevent the flow state solidified soil from entering the graded gravel layer.
As a specific embodiment of the filter pipe, the aperture ratio of the filter pipe is more than 16%, and the filter pipe is ensured to have enough structural strength and water passing capacity.
Furthermore, the side wall of the foundation outer wall of the fertilizer groove is provided with a waterproof layer so as to prevent water in the fertilizer groove from permeating into the underground foundation of the building from the foundation outer wall.
Preferably, the side wall of the side slope of the fertilizer groove is provided with a waterproof layer so as to prevent water around the underground foundation of the building from entering the fertilizer groove.
The invention also provides a water-blocking and draining anti-floating construction method, which is used for building the water-blocking and draining anti-floating construction structure and comprises the following steps:
waterproof layers are arranged at the bottom and two sides of the fertilizer tank, and plain concrete is poured at the bottom of the fertilizer tank construction area;
sequentially paving concrete and a waterproof layer on the plain concrete to build a protective layer;
laying a graded crushed stone layer on the protective layer, and laying a water filter pipe on the graded crushed stone layer, so that the water outlet end of the water filter pipe extends out of the base outer wall of the fertilizer tank;
and laying fluid solidified soil after laying the geotechnical cloth layer on the graded broken stone layer.
Compared with the prior art, the invention has the following advantages and beneficial effects:
1. the method comprises the following steps of sequentially paving a plain concrete layer, a protective layer, a graded crushed stone layer and a fluid-state solidified soil layer from the bottom of a fertilizer groove; a strainer with a plurality of water inlets is embedded in the graded broken stone layer, and the strainer is provided with a plurality of water inlets. The connection between the water seepage on the earth surface and the underground water is cut off through the plain concrete layer, the protective layer and the fluid state solidified soil layer, so that the increase of the water pressure of the underground water is prevented. Simultaneously, lay the level and join in marriage the metalling between protective layer and flow state solidification layer to bury the strainer in the level and join in marriage the metalling underground, discharge after filtering the groundwater that oozes and upwelling in order to be subsurface, thereby release the underground foundation buoyancy of building, the buoyancy of great reduction underground foundation plays the effect of anti superficial decompression.
2. The fertilizer groove is backfilled with the fluid solidified soil, the fluid solidified soil can be quickly solidified, and after the fluid solidified soil is solidified and hardened, the volume of the fertilizer groove is relatively stable, the drying shrinkage is small, the water stability is good, and the like, so that the backfilled soil is prevented from sinking and the water content is not sufficient. The compaction is not in place and the like. Therefore, the invention also improves the working efficiency, reduces the construction cost and shortens the construction period. Meanwhile, the fluid-state solidified soil can fill all gaps in a narrow space and a special-shaped structure space, large-scale tamping and rolling equipment is not needed in construction, and damage to the waterproof layer in the construction process is effectively reduced.
Drawings
The accompanying drawings, which are included to provide a further understanding of the embodiments of the invention and are incorporated in and constitute a part of this application, illustrate embodiment(s) of the invention and together with the description serve to explain the principles of the invention. In the drawings:
FIG. 1 is a schematic structural diagram of the present invention.
Names of various parts in the drawings:
1-plain concrete layer, 10-fertilizer groove, 11-basic outer wall, 2-protective layer, 3-graded crushed stone layer, 31-first-grade crushed stone layer, 32-second-grade crushed stone layer, 4-flow-state solidified soil layer, 5-water filter pipe, 6-geotextile layer, 8-terrace and 9-permanent water collecting pit.
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 below with reference to examples and accompanying drawings, and the exemplary embodiments and descriptions thereof are only used for explaining the present invention and are not meant to limit the present invention.
Examples
The utility model provides a hinder drainage anti construction structures that floats, includes plain concrete layer 1, plain concrete layer 1 lays in the bottom of fertile groove 10 groove. Plain concrete layer 1 is gone up and has been laid protective layer 2, graded rubble layer 3, flow state solidification soil layer 4 in proper order, and what know is, still laid terrace 8 above flow state solidification soil layer 4. And a strainer 5 is embedded in the graded crushed stone layer 3, the strainer 5 is provided with a plurality of water inlets, and the strainer 5 is used for leading water in the fertilizer tank 10 out of the fertilizer tank 10.
The invention cuts off the connection between the water seepage on the earth surface and the underground water through the plain concrete layer 1, the protective layer 2 and the fluid state solidified soil layer 4 so as to prevent the water pressure of the underground water from increasing. Simultaneously, lay graded rubble layer 3 between protective layer 2 and flow state solidified layer 4 to bury strainer 5 underground in graded rubble layer 3, discharge to building underground foundation (be the basement usually) in through strainer 5 after filtering the groundwater that oozes and upwelling in the subsurface, thereby release building underground foundation buoyancy, great reduction building underground foundation's buoyancy plays the effect of anti superficial decompression.
The anti-floating anchor rod adopted in the prior art has high requirement on geological conditions and is complex to construct; meanwhile, the buoyancy problem of underground water is not fundamentally solved, the underground foundation of the building is fixed through the anti-floating anchor rods, the anti-floating anchor rods bear higher pressure all the time, and if the buoyancy of the underground water is further increased, the risk of incapability of anchoring exists; and the bolt is in tension at all times, there is a risk of tensile failure.
It should be noted that the fluidized solidified soil is used as a novel backfill material. The working performance of the soil backfilling agent is better than that of the traditional backfilling soil, and the strength can be adjusted between 0.5MPa and 10MPa according to actual needs so as to meet the requirements of foundation backfill, foundation pit backfill and fertilizer groove backfill strength. The strength of the solidified soil is increased relatively quickly, and the solidified soil can be put on the ground for construction in the next step after pouring is completed for 12-24 hours, so that the construction period is greatly shortened. When the solidified soil is mixed, additives (main components are calcium oxide, activated alumina and silicon oxide) can be added according to soil quality and design requirements, the strength increase speed is controlled, and the strength and the fluidity are changed by adjusting the mixing proportion. After the fluid solidified soil is solidified and hardened, the volume of the fluid solidified soil has the characteristics of relative stability, small drying shrinkage, good water stability and the like, and compared with the natural backfilled soil, the fluid solidified soil also has impermeability after being solidified and hardened.
Therefore, the fertilizer tank 10 is backfilled with the fluid solidified soil, the fluid solidified soil can be quickly solidified, and after the fluid solidified soil is solidified and hardened, the volume has the characteristics of relative stability, small drying shrinkage, good water stability and the like, so that the defects of subsidence, insufficient water content, insufficient compaction and the like of the backfilled soil are overcome. The working efficiency is improved, the construction cost is reduced, and the construction period is shortened. Meanwhile, the fluid-state solidified soil can fill all gaps in a narrow space and a special-shaped structure space, large-scale tamping and rolling equipment is not needed in construction, and damage to the waterproof layer in the construction process is effectively reduced.
As a specific embodiment of the graded crushed stone layer 3, the graded crushed stone layer 3 includes a first graded crushed stone layer 31 and a second graded crushed stone layer 32, and the strainer 5 is located between the first graded crushed stone layer 31 and the second graded crushed stone layer 32. On the one hand, the construction of burying underground of strainer 5 is convenient for, on the other hand can ensure that the upper and lower both sides of strainer 5 all have sufficient gradation rubble to the impurity filtering of the water that will permeate in the structure.
Wherein, the rubble layer is joined in marriage to first order 31, second level 32 all adopt 20 ~ 30 mm's level to join in marriage the rubble and lay and form, and the second level is joined in marriage the rubble layer 32 and is located first order and joins in marriage the rubble layer 31 top, and second level joins in marriage rubble layer 32 thickness and is greater than 80cm, and first order is joined in marriage rubble layer 31 thickness and is greater than 30 cm.
As a specific embodiment of the protective layer 2, the protective layer 2 comprises a concrete layer on which a waterproof layer is laid. It will be appreciated that a concrete layer is laid over the plain concrete layer 1 to prevent the plain concrete layer 1 from being fractured, and a waterproof layer to prevent water on the ground surface from penetrating into the ground water.
Furthermore, a geotextile layer 6 is laid between the graded gravel layer 3 and the flow state solidified soil layer 4. In the embodiment, the geotextile layer 6 is formed by laying two layers of 400 g/square meter of non-woven geotextile to prevent underground water from flowing to the fluid state solidified soil layer 4. Meanwhile, the flow-state solidified soil 4 can be prevented from entering the graded gravel layer 3 during construction, and the water filtering capacity of the graded gravel layer 3 is reduced.
As a specific embodiment of the strainer 5, the opening rate of the strainer 5 is more than 16%, and the strainer is ensured to have enough structural strength and water passing capacity. In this embodiment, DN150PVC is used as the water filtering main pipe, and the aperture of the water inlet is larger than 10mm and smaller than 20cm, so as to ensure that the water in the graded crushed stone layer 3 can flow into the water filtering pipe 5 by itself.
The inlet openings are uniformly distributed on the side wall of the strainer 5, one end of the strainer 5 is sealed to prevent broken stones from entering the strainer 5, the other end of the strainer 5 extends into the underground foundation of the building, and in order to collect water discharged by the strainer 5, a permanent water collecting pit 9 (formed by integrally building the water collecting pit 9 and the underground foundation of the building) is arranged in the underground foundation of the building and is used for collection, so that centralized treatment is facilitated.
Further, a waterproof layer is arranged on the side wall of the foundation outer wall 11 of the fertilizer groove 10 to prevent water in the fertilizer groove 10 from permeating into the underground foundation of the building from the foundation outer wall. The waterproof coiled material of preferred adoption autohension is laid to the laying of waterproof layer and dropping in the construction, influence normal construction.
Preferably, the side wall of the slope of the fertilizer groove 10 is provided with a waterproof layer to prevent water around the underground foundation of the building from entering the fertilizer groove 10.
The construction method of the water-blocking, draining and anti-floating construction structure comprises the following steps:
s1, paving a waterproof layer on the surface of the foundation of the underground foundation, namely paving the waterproof layer on the surface of the side slope and the surface of the foundation, and after the underground foundation is built to form a fertilizer tank, uniformly arranging waterproof layers on two side walls of the fertilizer tank.
And S2, determining a fertilizer tank backfilling construction area, and pouring a plain concrete layer at the bottom of the construction area.
S3, after the plain concrete layer is solidified, pouring a concrete layer on the plain concrete layer; and paving a waterproof layer after the concrete is solidified to form a protective layer.
S4, paving 20-30 mm graded broken stones with the thickness larger than 30cm above the protective layer, and laying the strainer after leveling.
S5, continuously paving 20-30 mm graded broken stones, and continuously paving the broken stones after the water filter pipes are completely covered by the broken stones until the thickness of the graded broken stones is larger than 110 cm.
And S6, laying two layers of geotextiles above the graded gravel layer.
And S7, backfilling and pouring the fluid-state solidified soil layer by layer according to the backfilling depth of the fertilizer tank.
And S8, paving the terrace after the fluid-state solidified soil is solidified.
The above-mentioned embodiments are intended to illustrate the objects, technical solutions and advantages of the present invention in further detail, and it should be understood that the above-mentioned embodiments are merely exemplary embodiments of the present invention, and are not intended to limit the scope of the present invention, and any modifications, equivalent substitutions, improvements and the like made within the spirit and principle of the present invention should be included in the scope of the present invention.
Claims (10)
1. The utility model provides a hinder drainage anti construction structures that floats which characterized in that: the concrete fertilizer comprises a plain concrete layer (1), wherein the plain concrete layer (1) is laid at the bottom of a fertilizer tank (10);
a protective layer (2), a graded gravel layer (3) and a flow state solidified soil layer (4) are sequentially paved on the plain concrete layer (1);
the water filter pipe (5) is buried in the graded crushed stone layer (3), the water filter pipe (5) is provided with a plurality of water inlet holes, and the water filter pipe (5) is used for leading water in the fertilizer tank (10) out of the fertilizer tank (10).
2. The water-blocking, draining and anti-floating construction structure according to claim 1, wherein: the graded crushed stone layer (3) comprises a first graded crushed stone layer (31) and a second graded crushed stone layer (32), and the water filter pipe (5) is positioned between the first graded crushed stone layer (31) and the second graded crushed stone layer (32).
3. The water-blocking, draining and anti-floating construction structure according to claim 1, wherein: the protective layer (2) comprises a concrete layer, and a waterproof layer is laid on the concrete layer.
4. The water-blocking, draining and anti-floating construction structure according to claim 1, wherein: and a geotextile layer (6) is laid between the graded gravel layer (3) and the flow state solidified soil layer (4).
5. The water-blocking, draining and anti-floating construction structure according to claim 1, wherein: the opening rate of the water filter pipe (5) is more than 16 percent.
6. The water-blocking, draining and anti-floating construction structure according to claim 1, wherein: and a waterproof layer is arranged on the side wall of the foundation outer wall (11) of the fertilizer groove (10).
7. The water-blocking, draining and anti-floating construction structure according to claim 1, wherein: and a waterproof layer is arranged on the side wall of the side slope of the fertilizer groove (10).
8. A water-blocking, draining and anti-floating construction method is used for building the water-blocking, draining and anti-floating construction structure according to any one of claims 1 to 7, and is characterized by comprising the following steps:
pouring plain concrete at the bottom of the fertilizer tank construction area;
building a protective layer on the plain concrete;
laying a graded crushed stone layer on the protective layer, and laying a water filter pipe on the graded crushed stone layer, so that the water outlet end of the water filter pipe extends out of the base outer wall of the fertilizer tank;
and paving fluid solidified soil on the graded crushed stone layer.
9. The method of claim 8, wherein a waterproof layer is disposed on the bottom and both sides of the fertilizer tank before the plain concrete is poured.
10. The water-blocking, draining and anti-floating construction method according to claim 8 or 9, wherein a geotextile layer is laid on the graded gravel layer before the fluid-state fixing soil is laid.
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| CN112962681A (en) * | 2021-02-09 | 2021-06-15 | 青岛腾远设计事务所有限公司 | Construction method and construction structure for safe use of old basement |
| CN113175005A (en) * | 2021-04-29 | 2021-07-27 | 山东金城建设有限公司 | Anti-floating design and construction method for waterproof bottom plate of underground garage in rainstorm period |
| CN113175005B (en) * | 2021-04-29 | 2022-05-20 | 山东金城建设有限公司 | Anti-floating design and construction method for waterproof bottom plate of underground garage in rainstorm period |
| CN114294473A (en) * | 2022-01-27 | 2022-04-08 | 上海隧道工程有限公司 | Anti-floating construction method for pipe burying of fluid soil trench |
| CN114294473B (en) * | 2022-01-27 | 2024-05-10 | 上海隧道工程有限公司 | Anti-floating construction method for buried pipe of fluid soil ditch |
| CN114960693A (en) * | 2022-06-15 | 2022-08-30 | 北控水务(中国)投资有限公司 | Installation method of underground structure and fertilizer tank structure |
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