CN113106987A - Construction method for spraying and filling foundation pit fertilizer groove by wet spraying method - Google Patents
Construction method for spraying and filling foundation pit fertilizer groove by wet spraying method Download PDFInfo
- Publication number
- CN113106987A CN113106987A CN202110383400.5A CN202110383400A CN113106987A CN 113106987 A CN113106987 A CN 113106987A CN 202110383400 A CN202110383400 A CN 202110383400A CN 113106987 A CN113106987 A CN 113106987A
- Authority
- CN
- China
- Prior art keywords
- soil
- cement
- spraying
- foundation pit
- crushing
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Images
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
Landscapes
- Engineering & Computer Science (AREA)
- Mining & Mineral Resources (AREA)
- Life Sciences & Earth Sciences (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Paleontology (AREA)
- Civil Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Structural Engineering (AREA)
- Consolidation Of Soil By Introduction Of Solidifying Substances Into Soil (AREA)
Abstract
A construction method for spraying and filling a foundation pit fertilizer groove by a wet spraying method is characterized by comprising the following steps: (1) the small-sized crushing stirrer is used for crushing the field soil blocks and uniformly stirring the soil and the cement to form cement soil, and a little water is sprayed in the stirring process to inhibit dust; (2) injecting cement soil into the fertilizer tank by using a cement soil injection machine, wherein the proportion of water added in the injection process is 40-50% of the total amount of the cement soil, and injecting cement soil slurry capable of flowing; the water pressure is 0.5-1.0 MPa. The invention can ensure safe backfilling without damaging the existing supporting system and buildings; the on-site soil pile is used as a backfill material, is directly used after being crushed, does not need to be transported and consumed externally, saves the manufacturing cost by 50-60 percent compared with low-grade concrete or mortar, and reduces the transportation cost and the consumption cost of the externally transported waste soil. The construction period is short, and the operation is convenient. Has obvious economic benefit, social benefit and environmental protection benefit.
Description
Technical Field
The invention relates to a construction method for spraying and filling a foundation pit fertilizer groove by a wet spraying method, which is mainly used for backfilling the foundation pit fertilizer groove of a building, and also can be used for backfilling underground pipe galleries, house cores or cavities and the like.
Background
At present, most of the backfill designs of the foundation pit fertilizer groove of the building adopt plain soil backfill and layered tamping, or 2:8 lime soil or 3:7 lime soil backfill and step tamping, which is difficult to realize in the construction process in fact, even if the backfill can be implemented, the operation is poor, even if the backfill can be implemented, a plurality of construction units can save labor and materials, especially, the backfill in winter is not easy to find, so that frozen soil blocks and the like are filled into the fertilizer groove for saving trouble, and the frozen soil blocks and the like are automatically melted when the foundation pit is warm in spring in the next year, so that the foundation pit is sunk. If the wide fertilizer tank is backfilled by concrete or mortar, the cost is increased, the waste is serious, and the wide fertilizer tank is not accepted by most investors.
Moreover, the backfilling of the fertilizer groove is not compact, the anchor rod is removed blindly, so that the foundation pit collapses, the adjacent pipeline such as a tap water pipe or a gas pipeline is broken, and the result is 'water-overflowing golden hill' or 'dense smoke rolling luxurious sky'; there are also cases of damage such as severe cracking and tilting of adjacent structures.
Because the fertilizer tank or the pipe ditch is not densely backfilled, the vehicle is damaged and the people are killed due to long-term water seepage and immersion and sinking of the fertilizer tank or the pipe ditch, which also causes the sinking of the adjacent road. Such cases have occurred in many cities.
In addition, the prior art adopts a self-compacting cement soil slurry formula and a process, and the basic formula (1 m per square meter) of the self-compacting cement soil slurry formula3In (b) the materials used were: 100-400 kg of cement, 500-900 kg of good soil (soil capable of reacting with cement), 200-400 kg of stone chips or stone powder, 50-100 kg of fly ash and 1-3% of an accelerator or an early strength agent.
The cement can be ordinary portland cement, slag portland cement, or fly ash portland cement, composite cement and the like; the good soil can be silt, cohesive soil or sandy soil, sandy gravel and the like, and is soil capable of reacting with cement; the stone chips are byproducts of stone separation and are used for adjusting the pumpability, specific gravity and strength of the cement-soil mixture; if the sand-gravel soil is adopted on site, stone chips, fly ash and the like can not be added in the soil through tests, and the formula and the working procedures are simplified. The fly ash has the function of low-grade cement, and the pumpability of the mixture is improved; the accelerator has the functions of promoting the mixture to be quickly solidified and improving the early strength of the mixture. If necessary, early strength agent is added to raise its early strength and shorten coagulation time. If necessary, high-grade cement can be used, so that an accelerator and an early strength agent are omitted, and the formula and the working procedures are simplified.
The slurry can be delivered to the site by a concrete tank truck after being stirred by entrusting a special concrete stirring station, and can be directly poured or poured by adopting a chute, a ground pump or an automobile pump and the like according to the situation.
More than once, the soil is stirred on site, the soil is taken out on site, a forced stirrer capable of automatically metering is adopted for stirring, and the soil is conveyed by a ground pump for pouring.
The method has the same work efficiency as concrete mortar pouring, but is one third or even half cheaper than the concrete mortar.
However, the above process also has insurmountable disadvantages, such as that the stirring distance of the stirring station is far away from the field, which is inconvenient for traffic, high in transportation cost and not good for quality guarantee; the multi-purpose great equipment of present agitated vessel of on-the-spot stirring occupies the place greatly, and the scene can not satisfy sometimes, and second needs to set up special great dustproof canopy, takes trouble and time-consuming, also has the requirement to soil property in addition, and sometimes the soil that the scene was dug falls down and can not be used.
Disclosure of Invention
The invention provides a construction method for spraying and filling a foundation pit fertilizer groove by a wet spraying method, which solves the problem of environmental protection in order to solve the problem in the prior art.
The technical scheme of the invention is as follows: a construction method for spraying and filling a foundation pit fertilizer groove by a wet spraying method is characterized by comprising the following steps:
(1) the small-sized crushing stirrer is used for crushing the field soil blocks and uniformly stirring the soil and the cement to form cement soil, and a little water is sprayed in the stirring process to inhibit dust;
(2) and (3) injecting the cement soil into the fertilizer tank by using a cement soil injection machine, wherein the proportion of water added in the injection process is 40-50% of the total amount of the cement soil, the water pressure is 0.5-1.0 MPa, and flowable cement soil slurry is injected.
The small-sized crushing and stirring machine is a small-sized portable crushing and stirring machine, and the particle size of crushed on-site soil blocks is not more than 15 mm; controlling the volume ratio of cement to soil to be 1: 6-1: 8, the field detection of the water content meets the requirements of 'holding into a ball by hand, falling into the ground and blooming', can meet the requirements of environmental protection and dust suppression, and can be smoothly sprayed out.
The strength of the cement-soil slurry after being coagulated for 28 days is 0.4-1.0 MPa; permeability coefficient 1.0 x 10-6cm/s, and meets the requirements of strength, sedimentation prevention, seepage prevention and the like.
The invention has the advantages that:
(1) the site specificity requirement is met: many places are nervous, and the unable walking of foundation ditch limit tank car, forklift or soil-pulling vehicle, many times cross operation in addition, and the groove is being filled with fertilizer to the below, and the top is still under the building structure construction, and a large amount of materials such as template, reinforcing bar are piled up on the foundation ditch limit for the vehicle can't walk. Even vehicles with thick vegetation can not walk. In this case, the filling of the fertilizer trough by this method is advantageous because the pipe can be easily laid over long distances.
(2) Local materials are used, and the ingredients are simpler: the process is simple, only soil and cement are mixed, and large soil blocks can be used after being simply crushed, so that the process is simple in material preparation, simple in process, convenient to construct, economical and applicable.
(3) Equipment miniaturization and environmental protection: no matter the crushing and stirring machine or the air compressor and the injection machine are all small-sized equipment, the transportation in narrow places is very convenient, and more importantly, the equipment and facilities such as simple dustproof sheds are environment-friendly and are also recognized by environmental protection departments. Mature equipment, mature technology, mature skilled operation workers, even if the operation workers are damaged, the maintenance and the replacement are convenient, and the environment-friendly and efficient effects are achieved.
(4) The filling device is particularly suitable for filling a recessed space below the overhanging part of the structure, finally forms viscous but flowable cement soil slurry, fills the fertilizer tank, and meets the requirements of strength, sedimentation prevention, seepage prevention and the like. The strength of the cement-soil coagulation body can reach 0.4-1.0 MPa; the permeability coefficient reaches 1.0 x 10-6 cm/s.
Drawings
FIG. 1 is a process flow diagram of the present invention.
Detailed Description
Referring to fig. 1, the construction method for filling the foundation pit fertilizer groove by the wet spraying method comprises the steps of utilizing a small-sized crushing stirrer to crush field soil blocks while stirring the soil and cement uniformly, spraying a little water in the stirring process to inhibit dust emission, providing power by an air compressor, spraying the cement soil to the fertilizer groove position by a cement soil spraying machine, and controlling the water quantity and the water pressure to enable the cement soil to fill the fertilizer groove. The fertilizer groove is very suitable when being narrow. Especially, the concave space below the cantilever structure has incomparable advantages. Finally, viscous but flowable cement soil slurry is formed, and the fertilizer tank is filled to meet the requirements of strength, sedimentation prevention, seepage prevention and the like.
A small and portable grinding and mixing machine is selected, and the grain diameter after grinding is not more than 15 mm. Controlling the volume ratio of cement to soil to be 1: 6-1: 8, field detection of water content, namely 'holding the mixture by hand to form a cluster, falling to the ground and flowering'. Can meet the requirements of environmental protection and dust suppression and can be smoothly sprayed out.
The cement is generally prepared by 32.5 grades, can be packaged or bulked, and can be preferably used for environmental protection. The product is qualified after delivery and retesting.
The invention can ensure safe backfilling, can not damage the existing supporting system and buildings, has the most obvious advantages that a large soil pile is piled on site, can be used as a backfilling material, soil is taken on site, and is directly utilized after being crushed without external transportation and absorption, the cost is saved by 50-60% compared with that of low-grade concrete or mortar, the method can save the direct cost of 250-300 ten thousand yuan when calculated according to theoretical amount and used for 10000m fertilization. And the labor for transportation and waste soil transportation is reduced by about 10000m, and the transportation cost and consumption are saved by 60 ten thousand yuan. The total amount can be saved by 320-360 ten thousand yuan. The construction period is shortest and the operation is most convenient. Therefore, the economic benefit, the social benefit and the environmental protection benefit are obvious.
Claims (3)
1. A construction method for spraying and filling a foundation pit fertilizer groove by a wet spraying method is characterized by comprising the following steps:
(1) the small-sized crushing stirrer is used for crushing the field soil blocks and uniformly stirring the soil and the cement to form cement soil, and a little water is sprayed in the stirring process to inhibit dust;
(2) and (3) injecting the cement soil into the fertilizer tank by using a cement soil injection machine, wherein the proportion of water added in the injection process is 40-50% of the total amount of the cement soil, the water pressure is 0.5-1.0 MPa, and flowable cement soil slurry is injected.
2. The construction method for spraying and filling the foundation pit fertilizer groove by the wet spraying method according to claim 1, wherein the small-sized crushing and stirring machine is a small-sized portable crushing and stirring machine, and the particle size of the crushed on-site soil blocks is not more than 15 mm; controlling the volume ratio of cement to soil to be 1: 6-1: 8, the field detection of the water content meets the requirements of 'holding into a ball by hand, falling into the ground and blooming', can meet the requirements of environmental protection and dust suppression, and can be smoothly sprayed out.
3. The construction method for filling the foundation pit with the fertilizer groove by the wet spraying method according to claim 1, wherein the strength of the cement-soil slurry after being solidified for 28 days is 0.4-1.0 MPa; permeability coefficient 1.0 x 10-6cm/s, and meets the requirements of strength, sedimentation prevention, seepage prevention and the like.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110383400.5A CN113106987A (en) | 2021-04-09 | 2021-04-09 | Construction method for spraying and filling foundation pit fertilizer groove by wet spraying method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110383400.5A CN113106987A (en) | 2021-04-09 | 2021-04-09 | Construction method for spraying and filling foundation pit fertilizer groove by wet spraying method |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN113106987A true CN113106987A (en) | 2021-07-13 |
Family
ID=76715075
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202110383400.5A Pending CN113106987A (en) | 2021-04-09 | 2021-04-09 | Construction method for spraying and filling foundation pit fertilizer groove by wet spraying method |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN113106987A (en) |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101633574A (en) * | 2009-05-31 | 2010-01-27 | 山西晋城无烟煤矿业集团有限责任公司 | Mining high durability light sprayed concrete |
| CN101857409A (en) * | 2010-05-28 | 2010-10-13 | 北京工业大学 | Flowing backfill and preparation and construction method thereof |
| CN112159160A (en) * | 2020-09-12 | 2021-01-01 | 北京综建科技有限公司 | Energy-saving environment-friendly backfill material and construction process thereof |
-
2021
- 2021-04-09 CN CN202110383400.5A patent/CN113106987A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101633574A (en) * | 2009-05-31 | 2010-01-27 | 山西晋城无烟煤矿业集团有限责任公司 | Mining high durability light sprayed concrete |
| CN101857409A (en) * | 2010-05-28 | 2010-10-13 | 北京工业大学 | Flowing backfill and preparation and construction method thereof |
| CN112159160A (en) * | 2020-09-12 | 2021-01-01 | 北京综建科技有限公司 | Energy-saving environment-friendly backfill material and construction process thereof |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN1165667C (en) | Method of filling hole by using aggregate | |
| CN102757206A (en) | Mine fracture grouting material and usage method thereof | |
| CN102557561A (en) | High-performance sand-soil consolidation material, as well as preparation method and using method thereof | |
| AU2020103401A4 (en) | Self-compacting Liquid Cement for Backfilling Trench | |
| CN105000845A (en) | Light foamed soil for abutment back backfilling and construction method | |
| CN107739177A (en) | Utilize the road pipe trench quickly stuffing material and its construction technology of building waste production | |
| CN107572956A (en) | A kind of premixing fluidised form solidified earth | |
| CN109940755A (en) | A kind of sorting and preparation method of filling material | |
| KR20070005645A (en) | Concrete composition, process for producing the same, method of regulating viscosity, and method of constructing cast-in-place concrete pile from the concrete composition | |
| CN109384439B (en) | High-strength quick-hardening type sprayed concrete and soft rock tunnel surrounding rock sealing and reinforcing method | |
| CN102101788A (en) | Red mud-based fluid swelling filling material | |
| CN112159160A (en) | Energy-saving environment-friendly backfill material and construction process thereof | |
| CN101684409A (en) | Soil chemical stabilizer formula and application | |
| CN100448790C (en) | Constructional material curing agent and its application in constructional material | |
| CN102101790A (en) | Tailing-based fluid swelling filling material | |
| CN111676987A (en) | Construction method for backfilling construction of construction fertilizer tank by vibrating, slurry-flushing and ramming method | |
| CN106939165A (en) | A kind of soil body curing agent and its preparation method and its gunnite method | |
| CN104762957A (en) | Construction method for spiral hole forming ram-expanded CFG pile | |
| CN102617078A (en) | Harbor construction sea reclaimed material utilizing silt and preparation method thereof | |
| CN112794682A (en) | Premixed fluid solidified soil doped with high-silicon type iron tailings and preparation method thereof | |
| CN109485320A (en) | The operating method of wet sprayed concrete technique for light section mine working | |
| CN112679156A (en) | A gelatinization gravel stone concrete for temporary protection engineering of bank side slope | |
| CN108191365A (en) | A kind of method using ardealite material cementing fill metal mine | |
| CN107082604A (en) | A kind of coarse aggregate phosphorus ore cemented filling material defeated applied to big times of spool | |
| CN113106987A (en) | Construction method for spraying and filling foundation pit fertilizer groove by wet spraying method |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| RJ01 | Rejection of invention patent application after publication | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20210713 |