CN115522561B - Construction method for foundation soil mold of tower crane of building engineering - Google Patents
Construction method for foundation soil mold of tower crane of building engineering Download PDFInfo
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- CN115522561B CN115522561B CN202211257350.7A CN202211257350A CN115522561B CN 115522561 B CN115522561 B CN 115522561B CN 202211257350 A CN202211257350 A CN 202211257350A CN 115522561 B CN115522561 B CN 115522561B
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- 239000002689 soil Substances 0.000 title claims abstract description 75
- 238000010276 construction Methods 0.000 title claims abstract description 64
- 239000004570 mortar (masonry) Substances 0.000 claims abstract description 29
- 238000000034 method Methods 0.000 claims abstract description 28
- 239000011083 cement mortar Substances 0.000 claims abstract description 16
- 239000002023 wood Substances 0.000 claims abstract description 12
- 239000011248 coating agent Substances 0.000 claims abstract description 10
- 239000003795 chemical substances by application Substances 0.000 claims abstract description 9
- 229910000831 Steel Inorganic materials 0.000 claims abstract description 8
- 239000010959 steel Substances 0.000 claims abstract description 8
- 238000000576 coating method Methods 0.000 claims abstract description 7
- 238000009412 basement excavation Methods 0.000 claims description 25
- 239000010410 layer Substances 0.000 claims description 17
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 12
- 230000008569 process Effects 0.000 claims description 11
- 239000004568 cement Substances 0.000 claims description 9
- 230000001680 brushing effect Effects 0.000 claims description 8
- 239000002344 surface layer Substances 0.000 claims description 8
- 238000009966 trimming Methods 0.000 claims description 8
- 239000011449 brick Substances 0.000 claims description 6
- 238000007790 scraping Methods 0.000 claims description 6
- 238000003490 calendering Methods 0.000 claims description 5
- 239000003673 groundwater Substances 0.000 claims description 5
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims description 4
- 238000007667 floating Methods 0.000 claims description 4
- 238000003892 spreading Methods 0.000 claims description 4
- 230000007480 spreading Effects 0.000 claims description 4
- 239000002699 waste material Substances 0.000 claims description 4
- 238000004140 cleaning Methods 0.000 claims description 3
- 238000007689 inspection Methods 0.000 claims description 3
- 238000002360 preparation method Methods 0.000 claims description 3
- 239000000428 dust Substances 0.000 claims description 2
- 229910052742 iron Inorganic materials 0.000 claims description 2
- 239000004576 sand Substances 0.000 claims description 2
- 239000000758 substrate Substances 0.000 claims description 2
- 239000004567 concrete Substances 0.000 abstract description 31
- 238000000465 moulding Methods 0.000 abstract description 4
- 239000011469 building brick Substances 0.000 abstract description 2
- 238000009434 installation Methods 0.000 description 7
- 239000000463 material Substances 0.000 description 4
- 238000009933 burial Methods 0.000 description 3
- 238000009415 formwork Methods 0.000 description 3
- 229910001294 Reinforcing steel Inorganic materials 0.000 description 2
- 238000009435 building construction Methods 0.000 description 2
- 238000005266 casting Methods 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 239000002184 metal Substances 0.000 description 2
- 229910052751 metal Inorganic materials 0.000 description 2
- 239000011241 protective layer Substances 0.000 description 2
- 235000008733 Citrus aurantifolia Nutrition 0.000 description 1
- 235000011941 Tilia x europaea Nutrition 0.000 description 1
- 230000004888 barrier function Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000004927 clay Substances 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 239000004744 fabric Substances 0.000 description 1
- 238000007710 freezing Methods 0.000 description 1
- 238000011065 in-situ storage Methods 0.000 description 1
- 239000004571 lime Substances 0.000 description 1
- 230000008520 organization Effects 0.000 description 1
- 238000005204 segregation Methods 0.000 description 1
- 238000004904 shortening Methods 0.000 description 1
- 239000002002 slurry Substances 0.000 description 1
- 238000003466 welding Methods 0.000 description 1
Classifications
-
- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D27/00—Foundations as substructures
- E02D27/32—Foundations for special purposes
- E02D27/42—Foundations for poles, masts or chimneys
-
- 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
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- Life Sciences & Earth Sciences (AREA)
- General Life Sciences & Earth Sciences (AREA)
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- Civil Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Structural Engineering (AREA)
- Foundations (AREA)
Abstract
The invention discloses a construction method of a foundation soil model of a tower crane of a building engineering, which comprises the following steps: (1) excavating and forming a foundation trench; (2) compacting the soil base; (3) checking the elevation of the basal plane and the size of the basal groove; (4) a foundation trench perimeter guard; (5) A plurality of mortar strips are provided on each vertical surface of the foundation trench to control the elevation of the soil mold base surface, cement mortar is paved on each vertical surface of the foundation trench, and the cement mortar surface is trowelled and polished after the mortar is collected; (6) checking and accepting the flatness of the soil mould; and (7) coating a release agent on the cement mortar surface to obtain the soil mold. Compared with the traditional construction method, the construction scheme of the invention effectively reduces disturbance to original soil, simultaneously omits working procedures such as supporting, removing wood forms (or steel forms) or building brick moulding bed, and the like, reduces disturbance to the concrete foundation of the tower crane, thereby ensuring the bearing capacity of the foundation and the concrete strength, improving the construction quality, further ensuring the bearing capacity of the foundation of the tower crane to meet the requirements, ensuring the operation safety of the tower crane and saving the cost.
Description
Technical Field
The invention relates to a construction method of a foundation soil formwork of a tower crane of a building engineering, and belongs to the field of building construction.
Background
In the construction process of the foundation of the site tower crane, some sites are relatively narrow, the excavation range is limited, and excessive earthwork is not piled up; or for some reasons, the on-site circulating materials are not timely in arrival, so that the special engineering construction of the tower crane construction is slowed down, in-situ concrete is often required in the building construction, and the templates are fixed by additional supporting devices, because the templates and the supporting devices of the templates are key factors for influencing the concrete forming.
In the prior art, in the construction of concrete, the construction method of pouring concrete after arranging a template and dismantling and backfilling earthwork after the concrete is solidified is generally adopted, and the construction method has the problems of complex molding and template fixing, long concrete hardening period, troublesome mold removal and backfilling, large investment of manpower and material resources and the like.
In view of the characteristics of short construction period and heavy task of part of engineering projects, the construction of the tower crane organization is continuously erected in the early-stage approach, the field is small, and the early-stage tower crane template cannot be advanced in time. If the traditional tower crane foundation construction method is adopted, larger-range earthwork excavation and waste soil piling and discarding are required to be carried out on tower crane positioning points, the construction method is required to wait for the entering of a template and installation after processing, and the construction method is also required to wait for the back of the concrete reaching the design strength and then form stripping and backfilling are required, so that the construction period requirement cannot be met.
Disclosure of Invention
The invention aims to provide a soil model construction method for a tower crane foundation of a building engineering, which is a pouring construction method for concrete of the tower crane foundation by a soil model method.
According to the invention, the tower crane foundation construction is carried out by adopting the soil formwork construction method, the soil layer is taken as a template, the soil layer is directly excavated into the concrete foundation shape, the soil layer excavation area is reduced, the disturbance to original soil is reduced, and the earthwork excavation workload is reduced, so that the foundation bearing capacity is ensured, the procedures of supporting and disassembling a bracket, manufacturing and installing a template, removing the formwork, backfilling and the like are omitted, the construction period of the tower crane foundation is shortened, the construction period requirement is met, and meanwhile, the construction cost is reduced. Compared with the traditional construction method, the soil model construction method of the tower crane foundation has the advantages of shortening the construction period, saving the cost and the like, and has strong applicability to different sites and geological conditions.
The invention provides a construction method of a foundation soil model of a tower crane of a building engineering, which comprises the following steps:
(1) And (3) foundation trench excavation and forming:
the structure of the base groove is regular ten hexagons and consists of regular concave-convex structures, the middle of the base groove is regular octagons, the outer part of the base groove is cross-shaped, four rectangular bumps are arranged on the outer sides of four sides of the octagon interval, namely 8 inner angles of the four rectangular bumps are right angles, 8 inner angles are formed at the joint of the inner regular octagons and the outer rectangular bumps, and the angle is 225 degrees;
(2) Compacting a soil base: the compactness of the tower crane foundation design is achieved;
(3) Checking the elevation of a basal plane and the size of a basal groove:
determining the size of a foundation trench according to the using specification of tower crane manufacturers, stress calculation and engineering land survey reports, wherein the height range of the foundation trench is 1.0m-2.0m, and the width is 2.0m-5m; the size requirement of the design drawing of the foundation of the corresponding tower crane is met; leveling each basal plane of the basal groove;
(4) Base groove perimeter protection:
after the earthwork excavation of the tower crane foundation is completed and the acceptance of the foundation trench is completed, ordinary sintered bricks are adopted to build water retaining walls around the upper part of the foundation trench;
(5) A plurality of mortar strips are provided on each vertical surface of the foundation trench to control the elevation of the soil mold base surface, cement mortar is paved on each vertical surface of the foundation trench, and the cement mortar surface is trowelled and polished after the mortar is collected;
(6) Checking and accepting the flatness of the soil mould;
(7) And coating a release agent on the cement mortar surface to obtain the soil mold.
Further, the preparation work before foundation trench excavation is as follows:
(1) Digging to the designed bottom elevation of a tower crane foundation trench according to a corresponding tower crane foundation design drawing, tamping a tower crane foundation according to the bearing capacity of the foundation, the soft characteristic and uniformity of soil, and then applying a soil mold after the designed bearing capacity requirement of the tower crane foundation is met;
(2) Trimming each base surface of the base groove; and checking whether the elevation and the flatness of the substrate meet the requirements.
Further, the operation method of the foundation trench excavation forming in the step (1) comprises the following steps: digging soil from the natural terrace elevation to the bottom of the designed foundation cushion layer by 20cm mechanically, and then manually digging the soil to the bottom of the designed foundation cushion layer;
the finished trimming slope is matched with the bottom cleaning, and the soil at each corner is manually matched with the trimming slope to be dug in place once; in the process of excavation, the center line and the geometric dimension of a foundation pit are checked; at the position 0.2 m away from the designed elevation of the pit bottom, a horizontal line is cut, small wood is nailed out, then temporary soil is dug away manually, and finally foundation pit bottom floating soil is removed;
four sides of the slope are adopted, and the slope releasing coefficient is 1:0.05, the distance between the toe of the waste soil pile and the groove side is not less than 2 meters, and the height is not more than 1.5 meters.
Further, the operation method of the protection of the periphery of the foundation tank in the step (4) is as follows: the 3-skin 120mm wide lime-sand brick retaining wall is paved around the upper part of the foundation trench to prevent ground water or sundries from falling into the foundation trench.
Further, the operation method of the step (5) is as follows: a plurality of mortar strips are provided on each vertical face of the foundation trench to control the elevation of the soil mold base surface, so that the mortar surfaces of the vertical faces are on the same plane, cement mortar with the thickness of 20mm and the thickness of 1:2.5 is paved in the middle of each mortar strip, a horizontal plate with the length of 3 meters is required to be used for scraping, and the mortar is calendered after the mortar is absorbed.
The secondary slurry lifting and calendaring are needed before the initial setting of the surface mortar of the soil mould so as to ensure the smooth and flat surface, and the release agent is uniformly coated before the reinforcing steel bar of the tower crane foundation is installed, so that the soil mould is easy to separate when the surrounding earthwork of the tower crane foundation is excavated.
Further, the operation method for brushing the release agent comprises the following steps: after the soil mold is inspected to be qualified, coating a release agent when the strength of the mortar reaches the M2.5-level strength requirement; the coating agent is uniformly coated when coated.
The invention has the beneficial effects that:
(1) According to the invention, a concrete foundation template construction method is used for reference, in the construction process of a tower crane foundation with a small construction site and limited excavation range, the site geology condition is combined with a concrete engineering construction process, the site geology is reasonably utilized, a soil layer is taken as a template, the soil layer is directly excavated into a concrete foundation shape, the excavation area of the soil layer is reduced, the disturbance to original soil is reduced, the demolding process is omitted, the disturbance to the tower crane concrete foundation is reduced, the foundation bearing capacity and the concrete strength are ensured, the construction quality is improved, the tower crane foundation bearing capacity meets the requirements, and the operation safety of the tower crane is ensured.
(2) Compared with the traditional construction method, the soil mold construction scheme omits procedures of supporting, disassembling wood molds (or steel molds) or building brick moulding bed and the like, thereby saving the construction period and the corresponding template material cost and the work cost, and further saving the cost.
Drawings
FIG. 1 is a schematic perspective view of a base tank according to the present invention.
Fig. 2 is a front view of fig. 1.
Fig. 3 is a top view of fig. 2.
Detailed Description
The present invention is further illustrated by, but not limited to, the following examples.
Example 1
The soil mold construction method of the tower crane foundation is adopted for construction in tower crane foundation construction in urban construction projects of Qin county KunBei city carving park of Tou-sign engineering agency company, and is suitable for construction of the tower crane foundation. The construction stage of the engineering is provided with 1 tower crane, the model of the tower crane is QTZ63 (5013), the design form of the tower crane foundation is cross, and the construction period of the engineering is the construction period in winter, so that the concrete of the tower crane foundation is prevented from being frozen, and a soil mold construction method is adopted, so that the anti-freezing protection area of the concrete is reduced.
The water level burial depth of the engineering groundwater is 8.20-9.00 m, the annual amplitude is +/-1.5 m, and the water level burial depth of 3-5 calendar history is about 6.70 m; the highest historical water level burial depth is about 5.20 m. The anti-floating water level is considered as the highest historical water level (79.7 m relative elevation). The ground water level of the field is deeper, the water lowering and draining treatment is not needed, the average elevation of the landform of the field is about-2.0, a large amount of soil is lacking in the field, the soil is needed to be purchased from the outside, and the excavation depth is 3.1m. The excavation depth of the foundation of the building to be built is 1.1m. The tower crane foundation and the building foundation are at the same elevation.
The concrete construction process is as follows:
1. site preparation
(1) Before earth excavation, the construction site is subjected to detailed survey, and the barriers on the ground and underground are cleared.
(2) And (3) performing excavation after the lime scattering line is qualified according to the drawing and the related tower crane foundation position control diagram, and setting an axis positioning control pile, wherein the working surface of the earth excavation line with the diameter of 500mm is additionally provided with a slope releasing coefficient of 1:0.05.
2. Foundation trench excavation forming
The soil is dug from the natural terrace elevation to the bottom of the design foundation cushion layer by 20cm mechanically, and then dug to the bottom of the design foundation cushion layer manually.
As shown in fig. 1 to 3, the structure of the base groove is regular decagonal, and is composed of regular concave-convex structures, the middle of the base groove is regular octagon, the outer is cross-shaped, four rectangular bumps are arranged on the outer sides of four sides of the octagon interval, that is, 8 inner angles of the four rectangular bumps are right angles, 8 inner angles are formed at the joint of the inner regular octagon and the outer rectangular bumps, and the angle is 225 °. In this embodiment, the height of the base groove is 1.5m, and the width is 2.2 m to 2.5 m.
The finished trimming slope is matched with the bottom cleaning, and the soil at each corner is manually matched with the trimming slope to be dug in place once. In the process of excavation, the center line and the geometric dimension of the foundation pit are checked, and the found problems are corrected in time. And (3) at the position 0.2 m away from the designed elevation of the pit bottom, a horizontal line is cut, small wood is nailed out, then temporary soil is dug away manually, and finally foundation pit bottom floating soil is removed.
Four sides of the slope are adopted, and the slope releasing coefficient is 1:0.05, the distance between the toe of the waste soil pile and the groove side is not less than 2 meters, and the height is not more than 1.5 meters.
3. Compacting soil base
According to the design specification of the tower crane foundation, the foundation bearing capacity requirement is more than or equal to 150KPa, the soil quality of the tower crane foundation position is good, the stratum is 3-2 layers of powdery clay according to the position of a geological survey report, and the foundation bearing capacity is 180KPa. In order to verify the bearing capacity of the foundation, the project department carries out rough detection by using an XHS-180 light feeler gauge, and the 30cm hammer of the softest part is hit for 28 times, so that 204KPa can be reached, and the bearing capacity of the foundation meets the requirement.
4. Pit leveling and groove inspection
Before the construction of the bearing platform of the tower crane and after the excavation of the foundation pit, the groove inspection is carried out according to the regulations of the current acceptance Specification for construction quality of foundation engineering of building, GB50202-2018, and the elevation, length, width and flatness of the pit bottom are inspected, namely the elevation of a base plane and the size of a foundation groove are inspected (the size requirement of a corresponding design drawing of the foundation of the tower crane is met).
5. Waterproof retaining wall masonry
After the earthwork excavation and foundation trench acceptance of the tower crane foundation are completed, ordinary sintered bricks are adopted to build water retaining walls around the upper part of the foundation trench, so that ground water, soil blocks and the like are prevented from falling into a foundation pit, the thickness of the water retaining walls is 240mm, and the building height is 200mm.
6. Cement mortar is laid on each vertical face of the foundation trench
(1) Firstly, dust on a base layer is cleaned off, and a steel wire brush and a chisel are used for brushing.
(2) And measuring the elevation of the surface layer downwards according to the horizontal line on the base groove, and bouncing on the side wall of the base groove.
(3) Uniformly sprinkling water on the side wall of the base groove by using a sprinkling can; and determining the plastering thickness of the surface layer according to the level line of the surface layer level sprung on the side wall of the foundation trench, and then pulling the level line to start plastering ash cakes (5 mm multiplied by 5 mm), wherein the horizontal-vertical distance is 1.5-2.0 m, and the upper plane of the ash cakes is the surface layer level of the ground.
(4) Before the cement mortar is paved, a layer of cement paste is coated, the water-cement ratio is 0.4-0.5, the coating area is not excessively large, and the cement paste is paved along with the brushing.
(5) Spreading cement mortar immediately after brushing cement paste, spreading the mortar uniformly among ash cakes, and then scraping the mortar with a wood scraping bar according to the height of the ash cakes; and meanwhile, the utilized ash cakes are knocked off and filled with mortar.
(6) After being combed by a wood trowel, the wood trowel is combed by an iron trowel for three times, so that trowel calendering is ensured.
7. Coating release agent
And after the compressive strength of the mortar reaches 2.5MPa, uniformly brushing a coating agent on the mortar surface around the foundation pit by adopting an oil brush.
8. Tower crane foundation steel bar installation
When binding the steel bars, the thickness of the protective layer is ensured to be 100mm.
9. Tower crane foundation bolt installation
Because the embedded foundation bolts of the tower crane directly determine the installation quality of the tower crane, the installation of the embedded parts is very important, and during the installation, the relative positions of the embedded opposite leg bolts need to be accurate to ensure the installation of the foundation sections; the embedded foundation bolt must be provided by the original manufacturer and cannot be processed by the user.
The foundation bolts are threaded on the underframe, nuts are screwed on, and each foundation bolt traverses a reinforcing steel bar with the length of phi 20 mm; measuring levelness of the chassis by taking the upper plane of the chassis as a reference, wherein the error of the levelness is less than or equal to 1mm; fixing the anchor bolts with the steel bars by using thin lead wires, and preventing the anchor bolts from tilting when pouring concrete; meanwhile, the heads of the bolts exposed on the ground are bound by plastic cloth, so that cement is prevented from splashing; because the foundation bolt is a special material, the anchor bolt is forbidden to be fixed by a welding method.
10. Lightning protection grounding
In order to avoid lightning strike, the main body structure of the tower crane, the motor base, the metal shells of all electrical equipment and the metal protection pipes of the wires should be reliably grounded, and the grounding resistance should be not more than 4Ω. When multiple repeated grounding is adopted, the grounding resistance is not more than 10Ω.
11. Tower crane foundation concrete construction
Before concrete is poured, concealed acceptance of the steel bars and the embedded parts is carried out, and records are made. The concrete is commercial concrete, and the basic concrete is directly pumped into the mould by an automobile pump. The slump of the on-site commodity concrete is ensured, the poured concrete is prevented from layering segregation, and the free falling height of the concrete is not more than 2 meters when the concrete is discharged from the hopper funnel. Before casting, arranging the positions of the pump trucks according to the plane, and casting the concrete on the bearing platform foundation once and continuously. And curing in time after concrete pouring.
Compared with the traditional method, the tower crane foundation constructed by the soil mold construction method of the tower crane foundation has the advantages of simple process, convenient operation, small occupied construction site, excellent formed section size, excellent protective layer thickness, perpendicularity, flatness and other structural appearance quality, and meanwhile omits the wood mold manufacturing, mounting and dismantling processes or the brick molding bed building process, saves engineering cost and shortens construction period time.
Claims (7)
1. The construction method of the foundation soil mould of the tower crane of the building engineering is characterized by comprising the following steps:
(1) And (3) foundation trench excavation and forming:
the structure of the base groove is regular ten hexagons and consists of regular concave-convex structures, the middle of the base groove is regular octagons, the outer part of the base groove is cross-shaped, four rectangular bumps are arranged on the outer sides of four sides of the octagon interval, namely 8 inner angles of the four rectangular bumps are right angles, 8 inner angles are formed at the joint of the inner regular octagons and the outer rectangular bumps, and the angle is 225 degrees;
the operation method for excavating and forming the foundation trench comprises the following steps: digging soil from the natural terrace elevation to the bottom of the designed foundation cushion layer by 20cm mechanically, and then manually digging the soil to the bottom of the designed foundation cushion layer; the finished trimming slope is matched with the bottom cleaning, and the soil at each corner is manually matched with the trimming slope to be dug in place once; in the process of excavation, the center line and the geometric dimension of a foundation pit are checked; at the position 0.2 m away from the designed elevation of the pit bottom, a horizontal line is cut, small wood is nailed out, then temporary soil is dug away manually, and finally foundation pit bottom floating soil is removed; four sides of the slope are adopted, and the slope releasing coefficient is 1:0.05, the slope is put, the distance between the waste soil pile slope foot and the groove edge is not less than 2 meters, and the height is not more than 1.5 meters;
(2) Compacting a soil base: the compactness of the tower crane foundation design is achieved;
(3) Checking the elevation of a basal plane and the size of a basal groove:
the height of the base groove ranges from 1.0m to 2.0m, and the width of the base groove ranges from 2.0m to 5.0m; the size requirement of the design drawing of the foundation of the corresponding tower crane is met; leveling each basal plane of the basal groove;
(4) Base groove perimeter protection:
after the earthwork excavation of the tower crane foundation is completed and the acceptance of the foundation trench is completed, building water retaining walls around the upper part of the foundation trench by adopting sintered bricks; the operation method of the protection of the periphery of the foundation tank in the step (4) is as follows: the periphery of the upper part of the foundation trench is paved with sand brick retaining walls so as to prevent ground water or sundries from falling into the foundation trench, the thickness of the retaining walls is 240mm, and the masonry height is 200mm;
(5) A plurality of mortar strips are provided on each vertical surface of the foundation trench to control the elevation of the soil mold base surface, cement mortar is paved on each vertical surface of the foundation trench, and the cement mortar surface is trowelled and polished after the mortar is collected;
(6) Checking and accepting the flatness of the soil mould;
(7) And coating a release agent on the cement mortar surface to obtain the soil mold.
2. The construction method of the foundation soil model of the tower crane of the building engineering according to claim 1, which is characterized in that: the preparation work before foundation trench excavation is as follows:
(1) Digging to the designed bottom elevation of a tower crane foundation trench according to a corresponding tower crane foundation design drawing, tamping a tower crane foundation according to the bearing capacity of the foundation, the soft characteristic and uniformity of soil, and then applying a soil mold after the designed bearing capacity requirement of the tower crane foundation is met;
(2) Trimming each base surface of the base groove; and checking whether the elevation and the flatness of the substrate meet the requirements.
3. The construction method of the foundation soil model of the tower crane of the building engineering according to claim 1, which is characterized in that: the operation method of compacting the soil base in the step (2) comprises the following steps: according to the design specification of the tower crane foundation, the foundation bearing capacity is more than or equal to 150kPa.
4. The construction method of the foundation soil model of the tower crane of the building engineering according to claim 1, which is characterized in that: the operation method of the step (3) comprises the following steps: before the construction of the bearing platform of the tower crane and after the excavation of the foundation pit, the groove inspection is carried out according to the regulations of the current acceptance Specification for construction quality of foundation engineering of building, GB50202-2018, and the elevation, length, width and flatness of the pit bottom, namely the elevation of a base surface and the size of the foundation groove, are inspected.
5. The construction method of the foundation soil model of the tower crane of the building engineering according to claim 1, which is characterized in that: the operation method of the step (5) comprises the following steps: a plurality of mortar strips are provided on each vertical face of the foundation trench to control the elevation of the soil mold base surface, so that the mortar surfaces of the vertical faces are on the same plane, cement mortar with the thickness of 20mm and the thickness of 1:2.5 is paved in the middle of each mortar strip, a horizontal plate with the length of 3 meters is required to be used for scraping, and the mortar is calendered after the mortar is absorbed.
6. The construction method of the foundation soil model of the tower crane for the building engineering according to claim 5, which is characterized by comprising the following steps: the operation method for paving mortar comprises the following steps:
(1) firstly, dust on a base layer is cleaned off, and a steel wire brush and a chisel are used for brushing;
(2) measuring elevation of the surface layer downwards according to a horizontal line on the base groove, and bouncing on the side wall of the base groove;
(3) uniformly sprinkling water on the side wall of the base groove by using a sprinkling can; determining the plastering thickness of the surface layer according to the level line of the surface layer level sprung on the side wall of the foundation trench, and then pulling the level line to start plastering ash cakes by 5mm multiplied by 5mm, wherein the horizontal-vertical distance is 1.5-2.0 m, and the upper plane of the ash cakes is the surface layer level of the ground;
(4) before cement mortar is paved, a layer of cement paste is coated, the water-cement ratio is 0.4-0.5, and the cement paste is paved along with the pavement mortar;
(5) spreading cement mortar immediately after brushing cement paste, spreading the mortar uniformly among ash cakes, and then scraping the mortar with a wood scraping bar according to the height of the ash cakes; knocking off the utilized ash cakes and filling up with mortar;
(6) after being combed by a wood trowel, the wood trowel is combed by an iron trowel for three times, so that trowel calendering is ensured.
7. The construction method of the foundation soil model of the tower crane of the building engineering according to claim 1, which is characterized in that: the operation method for brushing the release agent comprises the following steps: after the soil mold is inspected to be qualified, coating a release agent when the strength of the mortar reaches the M2.5-level strength requirement; the coating agent is uniformly coated when coated.
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| JPH09144024A (en) * | 1995-11-21 | 1997-06-03 | Koa:Kk | Method of formless foundation excavation construction of concrete |
| CN102505709A (en) * | 2011-11-03 | 2012-06-20 | 浙江天力建设集团有限公司 | Concrete-formwork-precast foundation construction method |
| JP2016186166A (en) * | 2015-03-27 | 2016-10-27 | Ｊｆｅ建材株式会社 | Concrete mold panel, concrete mold panel unit, concrete building frame structure, and concrete mold construction method |
| CN109252676A (en) * | 2018-11-02 | 2019-01-22 | 广东省水利水电第三工程局有限公司 | A kind of production technology and its safe construction method of basement cushion cap |
| CN111851523A (en) * | 2020-08-05 | 2020-10-30 | 谢珏庭 | Settlement deviation prevention method for foundation pit construction |
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| CA2916228C (en) * | 2015-12-23 | 2019-02-26 | 649119 N.B. Inc. | Pre-cast concrete foundation of modular construction for telecommunication or wind turbine tower |
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| JPH09144024A (en) * | 1995-11-21 | 1997-06-03 | Koa:Kk | Method of formless foundation excavation construction of concrete |
| CN102505709A (en) * | 2011-11-03 | 2012-06-20 | 浙江天力建设集团有限公司 | Concrete-formwork-precast foundation construction method |
| JP2016186166A (en) * | 2015-03-27 | 2016-10-27 | Ｊｆｅ建材株式会社 | Concrete mold panel, concrete mold panel unit, concrete building frame structure, and concrete mold construction method |
| CN109252676A (en) * | 2018-11-02 | 2019-01-22 | 广东省水利水电第三工程局有限公司 | A kind of production technology and its safe construction method of basement cushion cap |
| CN111851523A (en) * | 2020-08-05 | 2020-10-30 | 谢珏庭 | Settlement deviation prevention method for foundation pit construction |
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