CN115324024A - Construction method of engineering foundation by dynamic compaction method - Google Patents
Construction method of engineering foundation by dynamic compaction method Download PDFInfo
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- CN115324024A CN115324024A CN202210957467.XA CN202210957467A CN115324024A CN 115324024 A CN115324024 A CN 115324024A CN 202210957467 A CN202210957467 A CN 202210957467A CN 115324024 A CN115324024 A CN 115324024A
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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
- E02D3/046—Improving by compacting by tamping or vibrating, e.g. with auxiliary watering of the soil
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- Engineering & Computer Science (AREA)
- Life Sciences & Earth Sciences (AREA)
- Structural Engineering (AREA)
- Agronomy & Crop Science (AREA)
- Environmental & Geological Engineering (AREA)
- Soil Sciences (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Mining & Mineral Resources (AREA)
- Paleontology (AREA)
- Civil Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Investigation Of Foundation Soil And Reinforcement Of Foundation Soil By Compacting Or Drainage (AREA)
Abstract
The invention discloses a construction method of a dynamic compaction method of an engineering foundation, which comprises the following steps; firstly, full-time safety personnel carry out safety bottom-crossing and on-site inspection on a building construction site, acquire a construction drawing of the building site and carry out planning on a construction planning area on the ground according to the drawing; step two, cleaning the ground surface of the planned building construction field planning area; and step three, carrying out land leveling on the planned construction planning area of the building site, keeping the ground level in the area, and finishing the treatment before construction of the construction planning area of the building site. Compared with the prior art, the method has the advantages that: in the foundation construction method in building construction provided by the invention, the dynamic compaction construction in the hole is carried out, the protection of the rigid pile is not required to be considered, the construction restriction is less, and the construction is convenient; after the construction of the rigid pile is finished, the frictional resistance is in the positive direction, the upper load can be directly borne, and the bearing capacity is enhanced.
Description
Technical Field
The invention relates to the technical field of constructional engineering, in particular to a construction method of engineering foundation dynamic compaction.
Background
At present, in a composite foundation, most of load cannot be borne, a dynamic compaction method is a very common and practical foundation treatment method in airport road engineering and road engineering, and is also called a dynamic consolidation method, and the principle of the dynamic compaction method is that a heavy hammer of about 15 tons falls at a certain height, and the foundation is compacted by strong impact to realize compaction operation, so that the compactness of the foundation and the bearing capacity of the foundation are improved. The dynamic compaction method is suitable for cohesive soil, collapsible loess and sandy soil foundation of sand bag soil foundation in general.
Through the above analysis, the problems and defects of the prior art are as follows: the resource of carrying out foundation construction among the prior art occupies manyly, and extravagant serious, carries out the cost of foundation construction higher and the bearing capacity of foundation is relatively poor. And dust is easy to raise in the existing engineering foundation tamping process, and the control is difficult. The construction is relatively labor-consuming, and the safety is not high enough.
In order to solve the problems, a construction method of dynamic compaction of the engineering foundation is provided.
Disclosure of Invention
The invention aims to solve the technical problems and provide a construction method of the dynamic compaction of the engineering foundation, which has the advantages of less occupied resources for foundation construction, less waste, lower cost for foundation construction, stronger bearing capacity of the foundation, effective prevention of dust emission during construction, improved safety and reduced operators.
In order to solve the technical problems, the technical scheme provided by the invention is as follows:
the construction method of the dynamic compaction method of the engineering foundation comprises the following steps;
firstly, full-time safety personnel carry out safety bottom-crossing and on-site inspection on a building construction site, acquire a construction drawing of the building site and carry out planning on a construction planning area on the ground according to the drawing;
step two, cleaning the ground surface of the planned building construction field planning area;
thirdly, land leveling is carried out on the planned construction planning area of the building site, the ground level in the area is kept, and the treatment before construction of the planned construction area of the building site is completed;
determining the dynamic compaction hole depth according to a construction drawing of the building site to obtain a standard dynamic compaction depth, acquiring the height of the building site in the construction drawing of the building site, acquiring the soil bearing capacity of a construction planning area of the building site, and determining the dynamic compaction hole depth according to the acquired height of the building site and the soil bearing capacity;
fifthly, backfilling earthwork in a ramming area in a layering mode, leveling in time by using a bulldozer after dumping soil of a dump truck, enabling the thickness of each virtual layer to meet the requirement of layering thickness determined by trial ramming, spraying water with preset water quantity to the construction range of the foundation through a rocker arm high-pressure nozzle of pre-soaking rammer equipment to ensure that the foundation keeps preset water content, then dynamically ramming the foundation through the pre-soaking rammer equipment, and spraying the foundation to a ramming point in a fixed point through an atomizing spray gun of the pre-soaking rammer equipment in the dynamic ramming process to ensure that no raise dust exists;
and sixthly, arranging ramming points for the first time after the site is leveled, marking the position of each ramming point by lime points, numbering the ramming points, setting the deviation of the ramming points to +/-5 cm, determining the position of the point ramming, positioning a rear crane, aligning the center of a rammer to the position of the ramming points, measuring the elevation of the rammer, hoisting the rammer to a preset position, starting a unhooking device (tower rulers are welded on two sides of a hook device of a dragging device respectively), laying down a lifting hook after the rammer is unhooked freely, measuring the elevation of the top of the rammer, repeating the above operations in sequence until the compaction coefficient of the design requirement is reached, completing the first point ramming and meeting the design requirement, then performing point ramming construction for the second time, and performing point ramming for the same construction process as the first time, thereby realizing full-field ramming in the construction planning area of the construction site.
And cleaning the ground surface of the planned building construction planning area comprises removing building wastes or other non-soil impurities covered on the ground surface of the planned building construction area.
Humus soil, mucky soil, large stones and the like cannot exist in the backfilled soil, and if large soil blocks exist, the soil blocks are broken in time and backfilled.
The preset water content of the foundation is 10% -12%.
In the marking of the dynamic compaction points in the holes, the distance between any two adjacent dynamic compaction points in the holes is 3-5 m.
The ramming height of the heavy hammer is set to be 10-15 m, and the weight of the heavy hammer is more than 15 tons.
Compared with the prior art, the invention has the advantages that:
1. in the foundation construction method in building construction provided by the invention, the dynamic compaction construction in the hole is carried out, the protection of the rigid pile is not required to be considered, the construction restriction is less, and the construction is convenient; after the construction of the rigid pile is finished, the frictional resistance is positive, the upper load can be directly borne, and the bearing capacity is enhanced.
2. The foundation construction method in building construction has the advantages of simple construction process and high construction efficiency, can reduce the number of rigid piles under the condition of meeting the requirement of bearing capacity, and can realize the effects of reducing the use of resources and reducing the cost.
3. The invention can effectively avoid dust during construction.
4. In the invention, the two sides of the hook device are respectively welded with the tower rulers, thereby increasing the safety and reducing the number of operators.
Detailed Description
In the description of the present invention, it is to be understood that the terms "first", "second" and the like are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implying any number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of the present invention, "a plurality" means two or more unless otherwise specified. Furthermore, the term "comprises" and any variations thereof are intended to cover non-exclusive inclusions.
The present invention will be described in further detail with reference to the following embodiments and drawings.
The construction method of the dynamic compaction method of the engineering foundation comprises the following steps;
firstly, full-time safety personnel carry out safety bottom-crossing and on-site inspection on a building construction site, acquire a construction drawing of the building site and carry out planning on a construction planning area on the ground according to the drawing;
and step two, cleaning the ground surface of the planned area of the planned building construction site. The cleaning of the ground surface of the planned building construction planning area comprises the steps of removing building wastes or other non-soil impurities covered on the ground surface of the planned building construction planning area;
thirdly, land leveling is carried out on the planned construction planning area of the building site, the ground level in the area is kept, and the treatment before construction of the planned construction area of the building site is completed;
determining the depth of a dynamic compaction hole according to a construction drawing of the building site to obtain standard dynamic compaction depth, acquiring the height of the building site in the construction drawing of the building site, acquiring the soil bearing capacity of a construction planning area of the building site, and determining the depth of the dynamic compaction hole according to the acquired height of the building site and the soil bearing capacity;
and fifthly, backfilling earthwork in the ramming area in a layering mode, leveling in time by using a bulldozer after dumping soil of a dump truck, enabling the virtual paving thickness of each layer to meet the layering thickness requirement determined by trial ramming, spraying water with preset water quantity to the construction range of the foundation through a rocker arm high-pressure nozzle of the prefabricated pre-soaking rammer device to ensure that the foundation keeps the preset water content, then forcibly ramming the foundation through the pre-soaking rammer device, and spraying the foundation to a ramming point in a fixed point mode through an atomizing spray gun of the pre-soaking rammer device in the process of forcibly ramming so as to ensure that no raise dust exists. Humus soil, mucky soil, large stones and the like cannot be contained in the backfilled soil, and if large soil blocks exist, the backfilling is carried out in time. The preset water content of the foundation is 10% -12%;
and sixthly, arranging ramming points for the first time after the site is leveled, marking the position of each ramming point by lime points, numbering the ramming points, ensuring the deviation of the ramming points to be +/-5 cm, determining the position of the point ramming, positioning a rear crane, aligning the center of a rammer to the position of the ramming point, measuring the elevation of the rammer, hoisting the rammer to a preset position, starting a unhooking device (tower rulers are welded on two sides of a hook device of a dragging device respectively), laying down a lifting hook after the rammer is unhooked freely, measuring the elevation of the top of the rammer, repeating the above operations in sequence until the compaction coefficient of the design requirement is reached until the first point ramming is completed and the design requirement is met, then performing point ramming construction for the second time, and performing point ramming for the same construction process as the first time, thereby realizing full ramming of the whole site in a construction planning area of the construction site (the last two times are not more than 5 cm). In the marking of the dynamic compaction points in the holes, the distance between any two adjacent dynamic compaction points in the holes is 3-5 m. The ramming height of the heavy hammer is set to be 10-15 m, and the weight of the heavy hammer is more than 15 tons.
The invention and its embodiments have been described above without limitation. Without departing from the spirit of the invention, a person skilled in the art shall appreciate that embodiments similar to the above-described embodiments may be devised without inventing, and the invention shall fall within the scope of the claims.
Claims (6)
1. The dynamic compaction construction method of the engineering foundation is characterized by comprising the following steps: the construction method of the engineering foundation dynamic compaction comprises the following steps;
firstly, full-time safety personnel carry out safety bottom-crossing and on-site inspection on a building construction site, acquire a construction drawing of the building site and carry out planning on a construction planning area on the ground according to the drawing;
step two, cleaning the ground surface of the planned building construction field planning area;
thirdly, land leveling is carried out on the planned construction planning area of the building site, the ground level in the area is kept, and the pre-construction treatment of the construction planning area of the building site is completed;
determining the dynamic compaction hole depth according to a construction drawing of the building site to obtain a standard dynamic compaction depth, acquiring the height of the building site in the construction drawing of the building site, acquiring the soil bearing capacity of a construction planning area of the building site, and determining the dynamic compaction hole depth according to the acquired height of the building site and the soil bearing capacity;
fifthly, backfilling earthwork in a ramming area in a layering mode, leveling in time by using a bulldozer after dumping soil of a dump truck, enabling the virtual paving thickness of each layer to meet the layering thickness requirement determined by trial ramming, spraying water with preset water quantity to the construction range of the foundation through a rocker arm high-pressure nozzle of prefabricated pre-soaking rammer equipment to ensure that the foundation keeps preset water content, then dynamically ramming the foundation through the pre-soaking rammer equipment, and spraying the foundation at a fixed point to a ramming point through an atomizing spray gun of the pre-soaking rammer equipment in the dynamic ramming process to ensure that no raise dust exists;
step six, arranging first ramming points after the site is leveled, marking each ramming point position by lime points and numbering the ramming points, wherein the deviation of the ramming points is +/-5 cm, determining the point ramming position, positioning the crane, aligning the center of the rammer to the ramming point position, measuring the elevation of the rammer, lifting the rammer to a preset position, starting a unhooking device (tower rulers are welded on two sides of a hook device of a dragging device respectively), laying down a lifting hook after the rammer is unhooked freely, measuring the elevation of the top of the rammer, repeating the above operations in sequence until the compaction coefficient reaches the design requirement, completing the first ramming and meeting the design requirement, then performing second ramming construction, and performing the same point ramming in the construction process as the first ramming, thereby realizing full ramming of the whole site in the construction planning area of the building site.
2. The dynamic compaction construction method for engineering foundation according to claim 1, characterized in that: and cleaning the ground surface of the planned building construction planning area comprises removing building wastes or other non-soil impurities covered on the ground surface of the planned building construction area.
3. The dynamic compaction construction method for the engineering foundation according to claim 1, which is characterized in that: humus soil, mucky soil, large stones and the like cannot be contained in the backfilled soil, and if large soil blocks exist, the backfilling is carried out in time.
4. The dynamic compaction construction method for engineering foundation according to claim 1, characterized in that: the preset water content of the foundation is 10% -12%.
5. The dynamic compaction construction method for the engineering foundation according to claim 1, which is characterized in that: in the marking of the dynamic compaction points in the holes, the distance between any two adjacent dynamic compaction points in the holes is 3-5 m.
6. The dynamic compaction construction method for engineering foundation according to claim 1, characterized in that: the ramming height of the heavy hammer is set to be 10-15 m, and the weight of the heavy hammer is more than 15 tons.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210957467.XA CN115324024A (en) | 2022-08-10 | 2022-08-10 | Construction method of engineering foundation by dynamic compaction method |
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| CN202210957467.XA CN115324024A (en) | 2022-08-10 | 2022-08-10 | Construction method of engineering foundation by dynamic compaction method |
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| CN115324024A true CN115324024A (en) | 2022-11-11 |
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| CN202210957467.XA Pending CN115324024A (en) | 2022-08-10 | 2022-08-10 | Construction method of engineering foundation by dynamic compaction method |
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Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106049407A (en) * | 2016-06-25 | 2016-10-26 | 中国水利水电第四工程局有限公司 | Foundation dynamic compaction construction method |
| CN112921947A (en) * | 2021-03-23 | 2021-06-08 | 夏妙水 | Foundation construction method in house building construction |
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- 2022-08-10 CN CN202210957467.XA patent/CN115324024A/en active Pending
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106049407A (en) * | 2016-06-25 | 2016-10-26 | 中国水利水电第四工程局有限公司 | Foundation dynamic compaction construction method |
| CN112921947A (en) * | 2021-03-23 | 2021-06-08 | 夏妙水 | Foundation construction method in house building construction |
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