CN210658340U - Prefabricated dado - Google Patents
Prefabricated dado Download PDFInfo
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- CN210658340U CN210658340U CN201921320407.7U CN201921320407U CN210658340U CN 210658340 U CN210658340 U CN 210658340U CN 201921320407 U CN201921320407 U CN 201921320407U CN 210658340 U CN210658340 U CN 210658340U
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Abstract
The utility model discloses a prefabricated dado, which comprises a body, the cross-section of body is the rectangle, the body contains the prefabricated dado festival section of a plurality of, all prefabricated dado festival section stacks the setting in succession, adjacent two be equipped with attach fitting between the prefabricated dado festival section, adopt this device as the dado structure for the shaping rectangular hole can effectively avoid collapsing the hole when digging the hole, effectively guarantees the shaping size and the pore-forming quality of rectangular hole, reduces cast-in-place formwork, ligature reinforcing bar, pours and maintenance concrete cycle, improves the efficiency of construction, shortens construction period, improves the construction safety nature.
Description
Technical Field
The utility model relates to a dado construction technical field, in particular to prefabricated dado.
Background
With the development of social economy, large-diameter piles and ultra-large-diameter piles frequently appear in engineering, and the traditional construction process faces great challenges. The cross section of a pile foundation is generally divided into a round pile and a rectangular pile, the existing round pile is mainly constructed by matching mechanical hole forming with a mud retaining wall, full-mechanical construction is realized, if rotary drilling and impact drilling are adopted, the diameter of the pile is usually only 2.5m, the cross section size of the rectangular pile (such as an anti-slide pile) is large, usually 3m 4m or even larger, in the prior art, hole forming is mainly realized by manual operation, a cast-in-place concrete retaining wall is adopted for supporting and preventing hole collapse, the risk of manual hole digging is high, the retaining wall needs to be cast in place by a vertical mold, the construction period is long, and the engineering efficiency is greatly reduced.
SUMMERY OF THE UTILITY MODEL
The utility model aims to overcome among the prior art rectangular hole cross-sectional dimension great, can't pass through mechanical pore-forming, and adopt the manual work to dig the hole risk height, inefficiency, long period, shaping quality difference etc. above-mentioned not enough, provide a prefabricated dado.
In order to achieve the above object, the present invention provides the following technical solutions:
the prefabricated dado comprises a body, the cross section of the body is rectangular, the body comprises a plurality of prefabricated dado segments, all the prefabricated dado segments are continuously stacked, and a connecting joint is arranged between every two adjacent prefabricated dado segments.
Adopt a prefabricated dado, as the dado structure to needs fashioned rectangular hole, can effectively avoid collapsing the hole when digging the hole, effectively guarantee the shaping size and the pore-forming quality of rectangular hole, reduce cast-in-place formwork, ligature reinforcing bar, pour and maintenance concrete cycle, improve the efficiency of construction, shorten construction period, improve the construction safety.
Preferably, the bottom of the body is provided with a cutting edge.
Further preferably, the bottom surface of the cutting edge is a plane, the width of the bottom surface of the cutting edge is smaller than that of the top surface of the cutting edge, the inner wall of the cutting edge is a straight surface, and the outer wall of the cutting edge is an inclined surface.
Further preferably, the included angle between the inclined plane of the blade foot and the axial direction of the body is 15-55 degrees.
Preferably, attach fitting is including the last joint portion that is located the top and the lower clutch portion that is located the below, it contains a plurality of shear force key and a plurality of reinforcing bar to go up joint portion, lower clutch portion contains a plurality of recess and locates to correspond the built-in fitting in the recess, go up joint portion and lower clutch portion adaptation connection.
And pouring adhesive into the grooves, and inserting the shear keys and the steel bars of the segments to be installed into the corresponding grooves for butting adjacent segments.
Preferably, the body is a reinforced concrete member.
Preferably, the wall thickness of the body is 20 cm-50 cm.
Preferably, each of said prefabricated wall sections has a length of 1m-2 m.
Preferably, each of said prefabricated wall sections is of the same size.
A pile hole excavation method comprises the following steps:
a. construction lofting and pile hole location;
b. guiding holes to the designed elevation depth by adopting machinery, and clearing and transporting the earthwork of the guiding holes;
c. sinking the prefabricated retaining wall, positioning the prefabricated retaining wall segments of the first section, pressing the upper openings of the prefabricated retaining wall segments of the first section to a position of 10-50 cm from the natural ground, excavating the earth in the prefabricated retaining wall and clearing;
d. after the prefabricated retaining wall segment of the next section is connected to the top end of the prefabricated retaining wall segment of the previous section, pressing the upper opening of the prefabricated retaining wall segment of the next section to a position which is 10cm-50cm from the natural ground, excavating the earth in the prefabricated retaining wall and clearing the earth;
e. repeating the step d until the prefabricated retaining wall segment of the last section is connected to the top end of the prefabricated retaining wall segment of the penultimate section, pressing the upper opening of the prefabricated retaining wall segment of the last section to the natural ground, excavating the earth in the prefabricated retaining wall and clearing the earth to finish the excavation of the pile hole;
the prefabricated guard wall comprises a plurality of prefabricated guard wall sections, the cross section of the prefabricated guard wall is rectangular, and the cross section size of the lead hole in the step b is smaller than that of the prefabricated guard wall.
By adopting the pile hole excavating method, in order to excavate the rectangular hole, firstly, the mechanical hole guiding construction is carried out in the excavating area of the rectangular hole, the section size of the hole guiding is smaller than that of the prefabricated dado, namely smaller than that of the rectangular hole, after the internal hole is opened, the corner soil body in the range of the rectangular hole is disturbed, the internal stress is released, the subsequent excavating difficulty is greatly reduced, and the prefabricated dado segment is firstly settled and then excavated, the earthwork in the prefabricated dado is adopted, the excavating safety is further ensured, meanwhile, along with the continuous increase of the gravity of the prefabricated dado, the settling process of the prefabricated dado is easier, the construction efficiency is improved, the rectangular hole can be effectively excavated by adopting the method, the construction safety is improved, the manual participation is reduced, the construction difficulty is reduced, and the hole forming requirement of the large-size rectangular hole is met, meanwhile, the prefabricated retaining wall structure is effectively installed, the hole collapse risk is avoided, hole digging and retaining wall digging can be completed synchronously, the construction period is shortened, energy is saved, environment is protected, potential quality hazards of the retaining wall are effectively avoided, and the method is particularly suitable for the construction of the slide-resistant pile in high-cold high-altitude areas such as a Sichuan hidden line.
Preferably, in the step b, the hole forming center is located at the center of the prefabricated protective wall, and a slurry protective wall is used for hole guiding.
Preferably, in step c, the prefabricated retaining wall segments are settled by static pressure.
Preferably, when two adjacent prefabricated dado segments are connected, firstly, the grooves on the top surfaces of the installed prefabricated dado segments are filled with the bonding material, and then the shear keys and the reinforcing steel bars on the bottom surfaces of the prefabricated dado segments to be installed are inserted into the corresponding grooves.
The adjacent sections are convenient and stable to connect, convenient to position, good in shearing resistance effect and capable of avoiding corrosion.
To sum up, compare with prior art, the beneficial effects of the utility model are that:
1. adopt a prefabricated dado, can effectively avoid collapsing the hole when digging the hole, effectively guarantee the shaping size and the pore-forming quality of rectangular hole, reduce cast-in-place formwork, ligature reinforcing bar, pour and maintenance concrete cycle, improve the efficiency of construction, shorten construction period, improve the construction safety.
2. Adopt a stake hole excavation method, adopt this method can effectively excavate the rectangular hole, improve the construction safety, reduce artifical the participation, reduce the construction degree of difficulty, satisfy the pore-forming demand of large-size rectangular hole, effectively install prefabricated dado structure simultaneously, avoid appearing the hole risk of collapsing, dig hole and dado and can accomplish in step, be favorable to reduction of erection time, energy-concerving and environment-protective, effectively avoid the dado quality hidden danger to appear, the high cold high altitude area's of specially adapted *** line cling compound slide pile construction.
Description of the drawings:
fig. 1 is a schematic view of a pile hole excavation method according to the present invention;
FIG. 2 is a schematic structural view of a prefabricated wall according to example 1;
FIG. 3 is a schematic structural view of a prefabricated retaining wall segment of the first section of example 1;
FIG. 4 is a schematic illustration of the construction of a prefabricated retaining wall segment of the intermediate section of example 1;
fig. 5 is a schematic structural view of the last segment of the prefabricated retaining wall segment in example 1.
The labels in the figure are: 1-prefabricated dado segment, 2-groove and 3-blade foot.
Detailed Description
The present invention will be described in further detail with reference to the accompanying drawings and specific embodiments. However, it should not be understood that the scope of the above-mentioned subject matter is limited to the following embodiments, and all the technologies realized based on the present invention are within the scope of the present invention.
Example 1
A prefabricated dado, which comprises a body, the cross-section of body is the rectangle, the body contains prefabricated dado festival section 1 of a plurality of, all prefabricated dado festival section 1 stacks the setting in succession, adjacent two be equipped with attach fitting between the prefabricated dado festival section 1, prefabricated dado is reinforced concrete member, every prefabricated dado festival section 1's length is 1m-2m, the wall thickness of prefabricated dado is 20 cm-50cm, all prefabricated dado festival section 1's size is all the same, as shown in fig. 2.
Adjacent two be equipped with attach fitting between prefabricated dado section 1, attach fitting includes the last joint portion that is located the top when connecting and the lower clutch portion that is located the below, go up joint portion and lower clutch portion adaptation connection, it contains a plurality of shear force key and a plurality of reinforcing bar to go up joint portion, lower clutch portion contains a plurality of recess 2 and locates and corresponds built-in fitting (such as grout sleeve) in the recess 2, specifically, as shown in figure 3, the first section the top surface of prefabricated dado section 1 has a plurality of recess 2, the first section four terminal surfaces of prefabricated dado section 1 bottom set up the sword foot 3 of round steel in succession, reduced the resistance when prefabricated dado is transferred effectively, reduce construction cost, guarantee construction quality, preferentially, the bottom surface of sword foot 3 is the plane, the width of sword foot 3 bottom surface is less than the width of its top surface, the inner wall of the cutting edge 3 is a straight surface and is flush with the inner wall of the prefabricated protective wall, the outer wall of the cutting edge 3 is an inclined surface, and an included angle between the inclined surface of the cutting edge 3 and the axial direction of the body is 15-55 degrees, such as 30 degrees; as shown in fig. 4, longitudinal ribs and pre-embedded shear keys extend from each end surface of the bottom of the prefabricated retaining wall segment 1 of the middle section, grooves 2 are arranged at corresponding positions of the top surface of the prefabricated retaining wall segment 1 of the middle section, when two adjacent prefabricated retaining wall segments 1 are connected, firstly, a bonding material, such as cement-based grouting material, is poured into the grooves 2 of the top surface of the prefabricated retaining wall segment 1 to be installed, then, the shear keys and the steel ribs on the bottom surface of the prefabricated retaining wall segment 1 to be installed are inserted into the corresponding grooves 2, the connection between the adjacent segments is convenient and stable, the positioning is convenient, the shear resistance effect is good, the corrosion is avoided, and the structure of the prefabricated retaining wall segment 1 of the last section is similar to that of the middle section as shown in fig. 5.
The hole collapse can be effectively avoided when the hole is dug, the forming size and the hole forming quality of the rectangular hole are effectively guaranteed, the periods of cast-in-place formwork erecting, reinforcing steel bar binding, concrete pouring and concrete maintenance are reduced, the construction efficiency is improved, the construction period is shortened, and the construction safety is improved.
The concrete construction method for excavating the rectangular hole by adopting the prefabricated retaining wall in an auxiliary mode comprises the following steps:
a. construction lofting and pile hole location;
b. guiding holes to the designed elevation depth by adopting machinery, and clearing and transporting the earthwork of the guiding holes;
c. sinking the prefabricated retaining wall, positioning the prefabricated retaining wall segment 1 of the first section, pressing the upper opening of the prefabricated retaining wall segment 1 of the first section to a position of 10-50 cm from the natural ground, excavating earthwork in the prefabricated retaining wall and clearing the earthwork;
d. after the prefabricated retaining wall section 1 of the next section is connected to the top end of the prefabricated retaining wall section 1 of the previous section, pressing the upper opening of the prefabricated retaining wall section 1 of the next section to a position of 10cm-50cm from the natural ground, excavating the earth in the prefabricated retaining wall and clearing;
e. repeating the step d until the prefabricated retaining wall section 1 of the last section is connected to the top end of the prefabricated retaining wall section 1 of the penultimate section, pressing the upper opening of the prefabricated retaining wall section 1 of the last section to the natural ground, excavating the earth in the prefabricated retaining wall and clearing the earth to finish the excavation of the pile hole;
firstly, pile hole positions are determined, hole guiding construction is carried out in an excavation area of a rectangular hole by adopting machinery, for example, a circular hole is formed by rotary drilling, the section size of the circular hole is smaller than that of the rectangular hole, preferably, the hole forming center of the circular hole is positioned at the center of the prefabricated protective wall, a slurry protective wall can be adopted during hole guiding, after internal hole forming, the prefabricated protective wall begins to sink as shown in figure 1, for example, a static pressure method is adopted, the prefabricated protective wall segment 1 of the first section is firstly positioned, then the upper opening of the prefabricated protective wall segment 1 of the first section is pressed to a position 10cm-50cm higher than the natural ground, for example, 50cm higher than the natural ground, then earth in the prefabricated protective wall segment 1 of the first section is excavated and transported, because the hole is formed inside, the soil body at the corner in the range of the rectangular hole is disturbed, the internal stress is released, and the subsequent excavation difficulty is greatly reduced, and the prefabricated dado segment 1 is settled firstly and then earthwork in a corresponding area is excavated, the excavation safety is further ensured, then grouting is carried out in the groove 2 of the prefabricated dado segment 1 of the first section, the shear key and the reinforcing steel bar of the prefabricated dado segment 1 of the second section are correspondingly inserted into the groove 2 for butt joint, then the upper opening of the prefabricated dado segment 1 of the second section is pressed to a position of 10cm-50cm from the natural ground, then earthwork in the prefabricated dado is excavated and cleared, then the prefabricated dado segment 1 of the third section is connected, pile pressing is carried out, earthwork in the corresponding settlement depth of the prefabricated dado is excavated and cleared, namely, the pile pressing excavation clearing step is repeated, along with the continuous increase of the gravity of the prefabricated dado, the settlement process of the prefabricated dado is easier, the construction efficiency is improved, and the prefabricated dado segment 1 of the last section is connected to the top end of the prefabricated dado segment 1 of the penultimate section, and pressing the upper opening of the last prefabricated protecting wall segment 1 to the natural ground, finally excavating the earthwork in the prefabricated protecting wall and clearing the earthwork to finish the excavation of the pile hole.
By adopting the method, the rectangular hole can be effectively excavated, the forming size and the hole forming quality of the rectangular hole are ensured, the construction safety is improved, the manual participation is reduced, the construction difficulty is reduced, the hole forming requirement of the large-size rectangular hole is met, meanwhile, the prefabricated protective wall structure is effectively installed, the hole collapse risk is avoided, the excavation and the protective wall can be synchronously completed, the periods of cast-in-place formwork erecting, reinforcing steel bar binding and concrete pouring and maintenance are reduced, the construction period is favorably shortened, the energy is saved, the environment is protected, the quality hidden trouble of the protective wall is effectively avoided, and the method is particularly suitable for the slide-resistant pile construction in high-cold high altitude.
The above description is only exemplary of the present invention and should not be taken as limiting the scope of the present invention, as any modifications, equivalents, improvements and the like made within the spirit and principles of the present invention are intended to be included within the scope of the present invention.
Claims (7)
1. The prefabricated protecting wall is characterized by comprising a body, the cross section of the body is rectangular, the body comprises a plurality of prefabricated protecting wall sections (1), all the prefabricated protecting wall sections (1) are continuously stacked, a connecting joint is arranged between every two adjacent prefabricated protecting wall sections (1), a cutting edge (3) is arranged at the bottom of the body, the bottom surface of the cutting edge (3) is a plane, the width of the bottom surface of the cutting edge (3) is smaller than that of the top surface of the cutting edge (3), the inner wall of the cutting edge (3) is a straight surface, and the outer wall of the cutting edge (3) is an inclined surface.
2. Prefabricated retaining wall according to claim 1, characterized in that the angle between the bevel of the blade foot (3) and the axial direction of the body is 15 ° -55 °.
3. The prefabricated dado of claim 1, characterized in that, the attach fitting includes an upper fitting portion located above and a lower fitting portion located below, the upper fitting portion includes a plurality of shear keys and a plurality of reinforcing bars, the lower fitting portion includes a plurality of grooves (2) and embedded parts disposed in the corresponding grooves (2), the upper fitting portion and the lower fitting portion are connected in an adaptive manner.
4. A prefabricated dado according to any of claims 1-3, wherein said body is a reinforced concrete element.
5. A prefabricated retaining wall according to any one of claims 1 to 3, wherein the wall thickness of the body is from 20 cm to 50 cm.
6. Prefabricated retaining wall according to any of claims 1-3, characterized in that each of said prefabricated retaining wall segments (1) has a length of 1m-2 m.
7. Prefabricated retaining wall according to any of claims 1-3, characterized in that the dimensions of each of the prefabricated retaining wall segments (1) are identical.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921320407.7U CN210658340U (en) | 2019-08-14 | 2019-08-14 | Prefabricated dado |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921320407.7U CN210658340U (en) | 2019-08-14 | 2019-08-14 | Prefabricated dado |
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| CN210658340U true CN210658340U (en) | 2020-06-02 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201921320407.7U Active CN210658340U (en) | 2019-08-14 | 2019-08-14 | Prefabricated dado |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112095621A (en) * | 2020-09-18 | 2020-12-18 | 上海市基础工程集团有限公司 | Foundation pit supporting structure for narrow space and construction method thereof |
| CN113802578A (en) * | 2021-09-07 | 2021-12-17 | 中建三局集团有限公司 | Quickly-installed rectangular pile hole assembled type protective wall and installation method thereof |
-
2019
- 2019-08-14 CN CN201921320407.7U patent/CN210658340U/en active Active
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112095621A (en) * | 2020-09-18 | 2020-12-18 | 上海市基础工程集团有限公司 | Foundation pit supporting structure for narrow space and construction method thereof |
| CN113802578A (en) * | 2021-09-07 | 2021-12-17 | 中建三局集团有限公司 | Quickly-installed rectangular pile hole assembled type protective wall and installation method thereof |
| CN113802578B (en) * | 2021-09-07 | 2022-11-01 | 中建三局集团有限公司 | Quickly-installed rectangular pile hole assembled type protection wall and installation method thereof |
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