CN114351728A - Solidified soil stirring field and construction method for backfilling solidified soil in narrow high backfilling area - Google Patents
Solidified soil stirring field and construction method for backfilling solidified soil in narrow high backfilling area Download PDFInfo
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- CN114351728A CN114351728A CN202111571413.1A CN202111571413A CN114351728A CN 114351728 A CN114351728 A CN 114351728A CN 202111571413 A CN202111571413 A CN 202111571413A CN 114351728 A CN114351728 A CN 114351728A
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- 239000002689 soil Substances 0.000 title claims abstract description 169
- 238000010276 construction Methods 0.000 title claims abstract description 77
- 238000003756 stirring Methods 0.000 title claims abstract description 23
- 238000002156 mixing Methods 0.000 claims abstract description 51
- 239000002994 raw material Substances 0.000 claims abstract description 35
- 239000000463 material Substances 0.000 claims abstract description 17
- 238000003860 storage Methods 0.000 claims abstract description 14
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 17
- 239000003795 chemical substances by application Substances 0.000 claims description 16
- 239000012530 fluid Substances 0.000 claims description 16
- 238000012360 testing method Methods 0.000 claims description 12
- 238000002360 preparation method Methods 0.000 claims description 10
- 239000002002 slurry Substances 0.000 claims description 8
- 238000012545 processing Methods 0.000 claims description 5
- 238000005070 sampling Methods 0.000 claims description 5
- 238000004519 manufacturing process Methods 0.000 claims description 4
- 239000004746 geotextile Substances 0.000 claims description 3
- 238000012544 monitoring process Methods 0.000 claims description 3
- 239000002245 particle Substances 0.000 claims description 3
- 239000002985 plastic film Substances 0.000 claims description 3
- 229920006255 plastic film Polymers 0.000 claims description 3
- 238000004321 preservation Methods 0.000 claims description 3
- 238000005086 pumping Methods 0.000 claims description 3
- 239000004576 sand Substances 0.000 claims description 3
- 238000007790 scraping Methods 0.000 claims description 3
- 239000010802 sludge Substances 0.000 claims description 3
- 239000002352 surface water Substances 0.000 claims description 3
- 238000009749 continuous casting Methods 0.000 claims description 2
- 239000003516 soil conditioner Substances 0.000 claims 1
- 238000000034 method Methods 0.000 abstract description 11
- 238000005056 compaction Methods 0.000 abstract description 2
- 238000007711 solidification Methods 0.000 description 8
- 230000008023 solidification Effects 0.000 description 8
- 230000000694 effects Effects 0.000 description 4
- 238000012423 maintenance Methods 0.000 description 4
- 238000009412 basement excavation Methods 0.000 description 3
- 238000012546 transfer Methods 0.000 description 3
- 208000034189 Sclerosis Diseases 0.000 description 2
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- 238000009826 distribution Methods 0.000 description 2
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- 239000011148 porous material Substances 0.000 description 1
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Abstract
The invention relates to a solidified soil stirring field and a construction method for backfilling solidified soil in a narrow high backfilling area, wherein the solidified soil stirring field is arranged at a flat part near a construction field, the periphery of the solidified soil stirring field is provided with side slopes processed by slope releasing, the bottom surface of the solidified soil stirring field is provided with a concrete hardened layer with a high middle part and a low periphery and a drainage system, and the stirring field is internally provided with a material storage area, a raw material conveying area, a mixing area and a solidified soil conveying area. The compaction is not needed, the tamping procedure is omitted, the construction efficiency is improved, and the construction cost is reduced.
Description
Technical Field
The invention relates to the technical field of building construction, in particular to a solidified soil stirring field and a solidified soil backfilling construction method in a narrow high backfilling area.
Background
With the development of the construction industry, in order to solve the problem of shortage of urban land utilization, underground space construction projects are more and more extensive, and for underground projects such as basements and underground shopping malls, large earth excavation amount exists, high cost is often spent for carrying out transfer treatment, even the condition of random stacking exists, the project construction cost is increased, and meanwhile, the ecological environment is damaged.
Meanwhile, the external walls of basements, underground shopping malls and the like need to be backfilled after the main body is constructed, the traditional process mostly adopts plain soil or lime soil for construction by layers by using small tamping equipment, the construction difficulty is higher, the backfilling period is longer, and the backfilling quality is difficult to control, so that most projects only adopt plain concrete for backfilling to ensure the backfilling quality, the construction cost is higher by adopting the plain concrete for backfilling, and the higher strength brings problems to later-stage maintenance; and the outer wall range of basement, underground market etc. is big, and backfill width is narrow, and the backfill depth is high, because the construction space is not enough, can not adopt manual work or mechanical tamping, can not ensure the closely knit degree and the backfill intensity of backfilling, leads to having the potential safety hazard, and the later stage is maintained the difficulty simultaneously.
Disclosure of Invention
In order to solve the technical problems, the invention provides a solidified soil stirring field and a construction method for backfilling solidified soil in a narrow high backfilling area, which realize the on-site processing of the soil excavated from a foundation pit in the solidified soil stirring field to prepare fluid solidified soil, and backfilling the fluid solidified soil into the narrow high backfilling area, thereby saving a large amount of transportation cost, protecting the ecological environment, simultaneously solving the problems of narrow backfilling area, high backfilling depth and incapability of construction by personnel and machinery in backfilling construction, having a waterproof effect after the solidified soil is solidified, solving the hidden danger of outer wall leakage, simultaneously ensuring that the solidified soil has quite high strength, does not need to be compacted, saving the tamping process, improving the construction efficiency and reducing the construction cost.
In order to achieve the purpose, the invention adopts the technical scheme that: a solidified soil mixing field is arranged at a flat position near a construction field, side slopes processed through slope releasing are arranged on the periphery of the mixing field, a concrete hardening layer with a high middle part and a low periphery and a drainage system are arranged on the bottom surface of the mixing field, and a material storage area, a raw material conveying area, a mixing area and a solidified soil conveying area are arranged in the mixing field.
By adopting the technical scheme, the stirring field is built near the construction field, a large amount of transfer cost is saved, the ecological environment is protected, the fluid state solidified soil can be prepared on the stirring field on site, the soil transportation from the outside of the field is avoided, the cost is saved, and the environment is protected.
Preferably, the concrete hardened layer is formed by processing C20 concrete, and the thickness of the concrete hardened layer is 10cm-20 cm.
Through adopting this technical scheme, realized the sclerosis on stirring field ground, guaranteed equipment fixing's stability, avoided the road muddy of rainy day simultaneously, the concrete sclerosis layer is middle high low all around is favorable to the drainage simultaneously.
Preferably, the drainage system comprises an open drain, a collector well and a pump for pumping water out of the collector well.
By adopting the technical scheme, the problem of drainage of the stirring field is solved, and the scheme is simple and easy to realize.
A backfill construction method for solidified soil in a narrow high backfill region is characterized by comprising the following steps:
s1: selecting sites near a construction site and constructing a solidified soil mixing field, wherein the sites are selected in areas with flat terrain and convenient traffic, if the sites are slope regions, the sites need to be repaired and leveled, then the solidified soil mixing field is constructed, slope arrangement treatment needs to be carried out on the periphery of the mixing field, a concrete hardened layer needs to be arranged on the bottom surface of the mixing field, and a drainage system needs to be arranged in the mixing field;
s2: conveying the soil dug by the foundation pit to a material storage area for later use, and conveying other raw materials required for preparing solidified soil to the material storage area for later use;
s3: determining the proportion of the solidified soil and preparing required raw materials in a material storage area;
s4: raw materials enter a mixing area through a raw material conveying area to carry out on-site preparation of fluidized solidified soil;
s5: conveying the mixed fluid-state solidified soil to a construction site through a solidified soil conveying area;
s6: backfilling fluidized solidified soil in layers;
s7: construction sampling;
s8: and maintaining the filling body.
Through adopting this technical scheme, the construction of flow state solidified soil backfill narrow high backfill region has been realized, the difficult problem that backfill region is narrow in the backfill construction, backfill degree of depth is high, personnel's machinery can't be under construction has been solved, and solidified soil still has water-proof effects after the solidification, the hidden danger of outer wall seepage has been solved, solidified soil still has fairly high intensity simultaneously, needn't the compaction, the process of ramming has been saved, construction efficiency has been improved, construction cost is reduced, in addition, can not produce the raise dust for the flow state when solidified soil is pour, and is more environment-friendly, and the recycle of excavation soil of foundation ditch has been realized, economic benefits is outstanding.
Preferably, the grade release processing in S1 has the following criteria:
s1a, digging the soil with the depth within 1m without considering slope putting;
s1b, digging the soil with the depth of 1.01-2.00 m, and releasing the slope according to the ratio of 1: 0.5;
s1c, digging the soil to the depth of 2.01-4.00 m, and releasing the slope according to the ratio of 1: 0.7;
s1d, digging the soil to a depth of 4.01-5.00 m, and placing the slope according to a ratio of 1: 1;
and S1e, digging the soil with the depth larger than 5m, and carrying out slope releasing according to the slope calculated by the soil stability theory.
By adopting the technical scheme, the soil wall is prevented from collapsing, and the construction safety is ensured.
Preferably, the solidified soil in S3 is prepared by mixing and stirring a curing agent, raw soil and water, wherein the raw soil is 100 parts, the curing agent is 9-12 parts, and the water is 28-34 parts.
By adopting the technical scheme, the fluid solidified soil with excellent flowing property can be prepared, the strength of the solidified soil in the process from fluid solidification to solid solidification is rapidly increased, the solidification time is short, the strength for next construction can be achieved within 12 hours, the characteristic can ensure continuous implementation of layered backfilling, the reasonable distribution of the construction time is facilitated, and the construction efficiency is high.
Preferably, the preparation process of the fluid solidified soil in S4 is as follows:
s4a, preparing raw material soil, using local materials, selecting soil excavated from the foundation pit as the raw material soil, and crushing when the raw material soil has larger particles, wherein the maximum diameter is not more than 5 cm; when the raw material soil is sludge, a certain amount of sand needs to be added;
s4b, mixing a curing agent and water according to a mixing ratio to synthesize slurry;
and S4c, adding the curing agent slurry and the raw material soil into a mixing area for fully stirring to complete the preparation of the fluid state curing soil.
By adopting the technical scheme, the soil excavated from the foundation pit is recycled to be prepared into the solidified soil, so that the transport cost of the excavated soil is saved, the expenses for transporting and purchasing the soil from the outside are saved, the energy is saved, and the ecological environment is protected.
The curing agent and the water are mixed into slurry according to the mixing proportion, then the curing agent slurry and the raw material soil are put into a mixing area for fully mixing, the curing agent can be uniformly and fully mixed in a seed folding mode, the due performance of the curing agent can be better exerted, and meanwhile, the proportion can be adjusted to adapt to the specific conditions of different construction sites and better meet the construction requirements.
Preferably, the step of backfilling the fluid solidified soil in the S6 layer by layer comprises the following steps:
s6a, performing backfill pouring according to a layered and block dividing mode, wherein the initial setting time of solidified soil is 6 hours, the final setting time is 12 hours, and the upper layer pouring operation is performed after the final setting of the lower layer;
s6b, reasonably distributing construction machinery and personnel during pouring on the elevation control line on the groove wall of the backfill region, monitoring the elevation control line on the groove wall of the backfill region at any time, and ensuring that the pouring of each layer is carried out basically horizontally until the elevation control line is reached, wherein the top surface after pouring needs manual auxiliary scraping;
and S6c, continuously and quickly completing backfilling, wherein in construction, surface water is prevented from flowing into a backfilling area, rain-proof drainage measures are required, and accumulated water and soft soil are removed and the solidified soil is filled when the solidified soil is backfilled or not initially set, such as the solidified soil is soaked by rain.
By adopting the technical scheme, the mode of layered backfilling is adopted, the problem that pores are formed in the interior due to the fact that too thick air is not easy to discharge is avoided, heat generated in the pouring process is favorably dissipated, the problem of temperature cracks caused by the fact that the difference between the inside temperature and the outside temperature is increased is avoided, the working face required by backfilling of the fluidized solidified soil is small, multiple sections of layered backfilling can be simultaneously constructed, the construction speed is high, the process links are few, and the construction period is short.
Preferably, the construction sampling standard in S7 is:
continuously casting for less than 400m3At a rate of every 200m3Preparing a group of test pieces;
continuously casting for more than 400m3At a rate of every 400m3Preparing a group of test pieces;
the test block is prepared according to the same preparation method of the concrete test block, the size of the test block is 70.7mm multiplied by 70.7mm, the 28-day strength of the solidified soil is not less than 0.6MPa, and the slump is 220 +/-20 mm.
By adopting the technical scheme, the excellent comprehensive performance of the slump in the aspects of workability, strength improvement, aggregate balance and the like is realized.
Preferably, the curing of the filling body in the step S8 is performed immediately after the top layer is poured, and the surface of the filling body is covered with a plastic film or geotextile for moisture preservation and curing, wherein the curing time is not less than 7 days.
By adopting the technical scheme, the construction quality of the solidified soil backfill is ensured.
In summary, the invention has the following beneficial technical effects:
1. the stirring field is built near the construction field, so that a large amount of transfer cost is saved, the ecological environment is protected, the fluidized solidified soil can be prepared on the site in the stirring field, the soil is prevented from being transported from the outside of the field, the cost is saved, and the ecological environment is protected.
2. By adopting the construction method for backfilling the solidified soil in the narrow high backfilling area, the construction of backfilling the fluid-state solidified soil in the narrow high backfilling area is realized, the problems of narrow backfilling area, high backfilling depth and incapability of constructing personnel and machinery in backfilling construction are solved, the solidified soil has a waterproof effect after solidification, the hidden danger of leakage of an outer wall is solved, meanwhile, the solidified soil also has quite high strength and is not required to be compacted, the tamping process is omitted, the construction efficiency is improved, the construction cost is reduced, in addition, no dust can be raised for the fluid state when the solidified soil is poured, the method is more environment-friendly, the reutilization of excavation soil of a foundation pit is realized, and the economic benefit is outstanding.
3. Through the preparation method of the solidified soil in the technical scheme, the fluid solidified soil with excellent flowing property can be prepared, the strength of the solidified soil in the process from fluid solidification to solid solidification is rapidly increased, the solidification time is short, the strength for next construction can be achieved by the last person in 12 hours, the characteristic can ensure continuous implementation of layered backfilling, the reasonable distribution of the construction time is facilitated, and the construction efficiency is high.
4. Through adopting the mode of layering backfill, avoided pouring too thick air and be difficult for discharging and form the problem in hole in inside, be favorable to will pouring the in-process and produce the heat and spill, avoid forming the cracked problem of temperature because of inside and outside difference in temperature increases, and flow state solidified soil backfill required working face is less, but the multistage simultaneous construction of layering backfill, construction speed is fast, and the technology link is few, and the time limit for a project is short.
Drawings
FIG. 1 is a schematic view of a solidified soil stirring field;
FIG. 2 is a flow chart of a construction method for backfilling solidified soil in a narrow high backfill area.
Description of reference numerals: 1-side slope; 2-a concrete hardened layer; 3-a drainage system; 4-a material storage area; 5-a feedstock delivery zone; 6-a mixing zone; 7-solidified soil conveying area.
Detailed Description
The present invention will be described in further detail with reference to the accompanying drawings.
Example 1
The embodiment discloses a solidified soil mixing field and a construction method for backfilling solidified soil in a narrow high backfill region, and the construction method comprises a solidified soil mixing field as shown in figure 1, and is characterized in that the solidified soil mixing field is arranged at a flat part near a construction field, side slopes 1 subjected to slope releasing treatment are arranged on the periphery of the solidified soil mixing field, a concrete hardened layer 2 with a high middle part and a low periphery and a drainage system 3 are arranged on the bottom surface of the solidified soil mixing field, and a material storage region 4, a raw material conveying region 5, a mixing region 6 and a solidified soil conveying region 7 are arranged in the mixing field.
The concrete hardened layer 2 is formed by processing C20 concrete, and the thickness of the concrete hardened layer 2 is 10cm-20 cm.
The drainage system 3 comprises a drainage open channel, a water collecting well and a water pump for pumping water out of the water collecting well.
A backfill construction method for solidified soil in a narrow high backfill region is characterized by comprising the following steps:
s1: selecting sites near a construction site and constructing a solidified soil mixing field, wherein the sites are selected in areas with flat terrain and convenient traffic, if the sites are slope regions, the sites need to be repaired and leveled, then the solidified soil mixing field is constructed, slope releasing treatment is carried out on the periphery of the mixing field, a concrete hardening layer 2 is arranged on the bottom surface of the mixing field, and a drainage system 3 is arranged in the mixing field;
the slope-releasing treatment standard is as follows:
s1a, digging the soil with the depth within 1m without considering slope putting;
s1b, digging the soil with the depth of 1.01-2.00 m, and releasing the slope according to the ratio of 1: 0.5;
s1c, digging the soil to the depth of 2.01-4.00 m, and releasing the slope according to the ratio of 1: 0.7;
s1d, digging the soil to a depth of 4.01-5.00 m, and placing the slope according to a ratio of 1: 1;
s1e, digging the soil to a depth larger than 5m, and carrying out slope releasing according to the slope calculated by the soil stability theory;
s2: conveying the soil dug by the foundation pit to a material storage area 4 for later use, and conveying other raw materials required for manufacturing solidified soil to the material storage area 4 for later use;
s3: determining the proportion of the solidified soil and preparing the required raw materials in the material storage area 4;
the solidified soil is formed by mixing and stirring a curing agent, raw material soil and water, wherein the raw material soil comprises 100 parts of the raw material soil, 9-12 parts of the curing agent and 28-34 parts of the water;
s4: raw materials enter a mixing area 6 through a raw material conveying area 5 to carry out on-site preparation of fluid solidified soil:
s4a, preparing raw material soil, using local materials, selecting soil excavated from the foundation pit as the raw material soil, and crushing when the raw material soil has larger particles, wherein the maximum diameter is not more than 5 cm; when the raw material soil is sludge, a certain amount of sand needs to be added;
s4b, mixing a curing agent and water according to a mixing ratio to synthesize slurry;
s4c, adding the curing agent slurry and the raw material soil into the mixing area 6 for fully stirring to complete the preparation of the fluid state curing soil;
s5: conveying the mixed fluid-state solidified soil to a construction site through a solidified soil conveying area 7;
s6: layered backfilling of fluidized solidified soil:
s6a, performing backfill pouring according to a layered and block dividing mode, wherein the initial setting time of solidified soil is 6 hours, the final setting time is 12 hours, and the upper layer pouring operation is performed after the final setting of the lower layer;
s6b, reasonably distributing construction machinery and personnel during pouring on the elevation control line on the groove wall of the backfill region, monitoring the elevation control line on the groove wall of the backfill region at any time, and ensuring that the pouring of each layer is carried out basically horizontally until the elevation control line is reached, wherein the top surface after pouring needs manual auxiliary scraping;
s6c, continuously and quickly completing backfilling, wherein in construction, surface water is prevented from flowing into a backfilling area, rain-proof drainage measures are required, solidified soil which is just backfilled or not initially set is removed, and the solidified soil is filled if the solidified soil is soaked by rain;
s7: construction sampling:
s7a. continuous casting of less than 400m3At a rate of every 200m3Preparing a group of test pieces;
s7b. continuously pouring more than 400m3At a rate of every 400m3Preparing a group of test pieces;
s7c, manufacturing a test block, wherein the size of the test block is 70.7mm multiplied by 70.7mm, the strength of the solidified soil is not less than 0.6MPa in 28 days, and the slump is 220 +/-20 mm;
s8: and (3) maintaining the filling body, wherein the maintenance is performed immediately after the top layer is poured, and the surface of the filling body is covered with a plastic film or geotextile for moisture preservation and maintenance, and the maintenance time is not less than 7 days.
The above description is only a preferred embodiment of the present invention, and is not intended to limit the present invention in other forms, and any person skilled in the art may apply the above-mentioned technical details to other fields by using the equivalent embodiments with equivalent changes or modifications, but any simple modification and equivalent changes made to the above embodiments according to the technical spirit of the present invention may still fall within the protection scope of the technical solution of the present invention.
Claims (10)
1. The solidified soil mixing field is characterized in that a flat part near a construction site is arranged, side slopes (1) processed through slope relief are arranged on the periphery of the flat part, a middle high concrete hardened layer (2) and a drainage system (3) which are low in the periphery are arranged on the bottom surface of the flat part, and a material storage area (4), a raw material conveying area (5), a mixing area (6) and a solidified soil conveying area (7) are arranged in the mixing field.
2. The concrete mixing plant according to claim 1, wherein the concrete hardened layer (2) is formed by processing C20 concrete, and the thickness of the concrete hardened layer (2) is 10cm-20 cm.
3. A soil conditioner according to claim 1, wherein said drainage system (3) comprises open drain, collector wells and pumps for pumping water from the collector wells.
4. A backfill construction method for solidified soil in a narrow high backfill region is characterized by comprising the following steps:
s1: selecting sites near a construction site and constructing a solidified soil mixing field, wherein the sites are selected in areas with flat terrain and convenient traffic, if the sites are slope regions, the sites need to be repaired and leveled, then the solidified soil mixing field is constructed, slope-releasing treatment is carried out on the periphery of the mixing field, a concrete hardening layer (2) is arranged on the bottom surface of the mixing field, and a drainage system (3) is arranged in the mixing field;
s2: conveying the soil dug by the foundation pit to a material storage area (4) for standby, and conveying other raw materials required for manufacturing solidified soil to the material storage area (4) for standby;
s3: determining the proportion of the solidified soil and preparing the required raw materials in the material storage area (4);
s4: raw materials enter a mixing region (6) through a raw material conveying region (5) to carry out on-site preparation of fluid solidified soil;
s5: conveying the mixed fluid-state solidified soil to a construction site through a solidified soil conveying area (7);
s6: backfilling fluidized solidified soil in layers;
s7: construction sampling;
s8: and maintaining the filling body.
5. The backfill construction method for the solidified soil in the narrow high backfill area according to the claim 4, wherein the standard of the slope releasing treatment in the S1 is as follows:
s1a, digging the soil with the depth within 1m without considering slope putting;
s1b, digging the soil with the depth of 1.01-2.00 m, and releasing the slope according to the ratio of 1: 0.5;
s1c, digging the soil to the depth of 2.01-4.00 m, and releasing the slope according to the ratio of 1: 0.7;
s1d, digging the soil to a depth of 4.01-5.00 m, and placing the slope according to a ratio of 1: 1;
and S1e, digging the soil with the depth larger than 5m, and carrying out slope releasing according to the slope calculated by the soil stability theory.
6. The backfill construction method for the solidified soil in the narrow high backfill region according to claim 4, wherein the solidified soil in the S3 is formed by mixing and stirring 100 parts of solidified agent, 9-12 parts of solidified agent and 28-34 parts of water.
7. The backfill construction method for the solidified soil in the narrow high backfill region according to claim 4, wherein the preparation process of the fluid solidified soil in the S4 is as follows:
s4a, preparing raw material soil, using local materials, selecting soil excavated from the foundation pit as the raw material soil, and crushing when the raw material soil has larger particles, wherein the maximum diameter is not more than 5 cm; when the raw material soil is sludge, a certain amount of sand needs to be added;
s4b, mixing a curing agent and water according to a mixing ratio to synthesize slurry;
and S4c, adding the curing agent slurry and the raw material soil into the mixing area (6) for fully stirring to complete the preparation of the fluid state curing soil.
8. The backfill construction method for the solidified soil in the narrow high backfill region according to the claim 4, wherein the step of backfilling the fluidized solidified soil in the S6 in layers is as follows:
s6a, performing backfill pouring according to a layered and block dividing mode, wherein the initial setting time of solidified soil is 6 hours, the final setting time is 12 hours, and the upper layer pouring operation is performed after the final setting of the lower layer;
s6b, reasonably distributing construction machinery and personnel during pouring on the elevation control line on the groove wall of the backfill region, monitoring the elevation control line on the groove wall of the backfill region at any time, and ensuring that the pouring of each layer is carried out basically horizontally until the elevation control line is reached, wherein the top surface after pouring needs manual auxiliary scraping;
and S6c, continuously and quickly completing backfilling, wherein in construction, surface water is prevented from flowing into a backfilling area, rain-proof drainage measures are required, and accumulated water and soft soil are removed and the solidified soil is filled when the solidified soil is backfilled or not initially set, such as the solidified soil is soaked by rain.
9. The backfill construction method for the solidified soil in the narrow high backfill area according to the claim 4, wherein the construction sampling standard in the S7 is as follows:
s7a. continuous casting of less than 400m3At a rate of every 200m3Prepare oneAssembling test pieces;
s7b. continuously pouring more than 400m3At a rate of every 400m3Preparing a group of test pieces;
s7c, manufacturing the test block, wherein the size is 70.7mm multiplied by 70.7mm, the strength of the solidified soil is not less than 0.6MPa in 28 days, and the slump is 220 +/-20 mm.
10. The backfill construction method for the solidified soil in the narrow high backfill region according to claim 4, wherein the curing of the filling body in the step S8 is performed immediately after the top layer is poured, a plastic film or a geotextile is covered on the surface of the filling body for moisture preservation and curing, and the curing time is not less than 7 days.
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116177971A (en) * | 2023-01-04 | 2023-05-30 | 中国十九冶集团有限公司 | Preparation method of fluidized solidified soil and foundation trench backfilling construction method |
| CN116657581A (en) * | 2023-05-31 | 2023-08-29 | 中国建筑第二工程局有限公司 | Fluid-state solidified soil filling and backfilling method |
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| CN111593641A (en) * | 2020-03-12 | 2020-08-28 | 镇江路机重工科技有限公司 | Plant mixing treatment method and equipment for solidified soil |
| CN113585290A (en) * | 2021-07-29 | 2021-11-02 | 中建八局南方建设有限公司 | Deep foundation pit narrow fertilizer groove backfill construction method based on premixed fluidized solidified soil |
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| CN108797618A (en) * | 2018-06-21 | 2018-11-13 | 中国十七冶集团有限公司 | One kind being used for Urban Underground pipe gallery drainage of foundation pit structure and its construction method |
| CN111593641A (en) * | 2020-03-12 | 2020-08-28 | 镇江路机重工科技有限公司 | Plant mixing treatment method and equipment for solidified soil |
| CN113585290A (en) * | 2021-07-29 | 2021-11-02 | 中建八局南方建设有限公司 | Deep foundation pit narrow fertilizer groove backfill construction method based on premixed fluidized solidified soil |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN116177971A (en) * | 2023-01-04 | 2023-05-30 | 中国十九冶集团有限公司 | Preparation method of fluidized solidified soil and foundation trench backfilling construction method |
| CN116657581A (en) * | 2023-05-31 | 2023-08-29 | 中国建筑第二工程局有限公司 | Fluid-state solidified soil filling and backfilling method |
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