CN210459324U - Novel reinforcing device for single-pile vertical compression-resistant static load test pile head - Google Patents
Novel reinforcing device for single-pile vertical compression-resistant static load test pile head Download PDFInfo
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- CN210459324U CN210459324U CN201920857493.9U CN201920857493U CN210459324U CN 210459324 U CN210459324 U CN 210459324U CN 201920857493 U CN201920857493 U CN 201920857493U CN 210459324 U CN210459324 U CN 210459324U
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- 238000012360 testing method Methods 0.000 title claims abstract description 54
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- 238000007906 compression Methods 0.000 title claims abstract description 25
- 230000003014 reinforcing effect Effects 0.000 title claims abstract description 25
- 230000003068 static effect Effects 0.000 title claims abstract description 25
- 229910000831 Steel Inorganic materials 0.000 claims abstract description 54
- 239000010959 steel Substances 0.000 claims abstract description 54
- 230000002787 reinforcement Effects 0.000 claims abstract description 21
- 229910001294 Reinforcing steel Inorganic materials 0.000 claims description 6
- 238000010276 construction Methods 0.000 abstract description 3
- 239000000463 material Substances 0.000 abstract description 3
- 238000002360 preparation method Methods 0.000 abstract description 3
- 238000003466 welding Methods 0.000 description 7
- 238000004519 manufacturing process Methods 0.000 description 6
- 238000013461 design Methods 0.000 description 4
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- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 2
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- 239000004566 building material Substances 0.000 description 1
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Abstract
The utility model provides a novel reinforcing device for a single-pile vertical compression-resistant static load test pile head, which comprises a concrete pile cap, wherein the concrete pile cap is arranged on the pile head of a test pile, and the concrete pile cap and the pile head are fixedly connected in an integrated manner; and a steel reinforcement framework is embedded in the concrete pile cap. The cross-sectional diameter of concrete pile cap is greater than the diameter of experimental stake to make its pile head that can be than former experimental stake bear bigger pressure, and be difficult for crushing, safer, more accurate, more guaranteed test the vertical resistance to compression bearing capacity of large-tonnage single pile, can on-the-spot material collection and construction on the spot during preparation, the commonality is more extensive.
Description
[ technical field ] A method for producing a semiconductor device
The utility model relates to a vertical resistance to compression static load test technical field of single pile, a novel reinforcement of vertical resistance to compression static load test pile head of single pile very much.
[ background of the invention ]
The pile foundation has the advantages of high vertical bearing capacity, good integrity, small foundation settlement, strong anti-overturning capacity and the like, and is a main foundation type of a high-rise building. With the continuous expansion of urban construction scale in China, more and more high-rise buildings and super high-rise buildings are built, and some projects are limited by conditions such as geology and the like, the design value of the single pile bearing capacity of the pile foundation is larger and larger. The on-site vertical compression-resistant static load test of the single pile is the most direct and effective method for determining the vertical compression-resistant bearing capacity of the single pile, so that the vertical bearing capacity of a pile foundation needs to be ensured, and the joint of the pile top and a jack of the static load test also needs to meet the concentrated compression capacity. The pile top of the pile foundation may often have a slightly small concrete strength and an uneven plane due to a construction process, a manual pile-piling and the like, and the pile head of the pile foundation bursts due to insufficient compressive strength or stress concentration of the concrete in the static load test process, so that the normal test of the pile foundation is influenced. With the increasing design value of the bearing capacity of a single pile of a pile foundation, the pile head reinforcement treatment of the pile foundation is widely applied to various practical projects, most of the prior pile heads can only meet the vertical compression static load test of the single pile with the common smaller tonnage, and the pile head reinforcement treatment of the single pile with the large tonnage can not meet the requirements of the vertical compression static load test of the single pile.
[ Utility model ] content
For overcoming the defect that existing equipment exists, the utility model provides a novel reinforcement of vertical resistance to compression static load test pile head of single pile device, the structure is simple relatively, and the commonality is high, and the vertical resistance to compression static load test of single pile of the large tonnage of being convenient for develop for test data accuracy more, thereby guarantee the security of building.
The utility model discloses a realize like this: a novel reinforcing device for a single-pile vertical compression-resistant static load test pile head comprises a concrete pile cap, wherein the concrete pile cap is arranged on the pile head of a test pile, and the concrete pile cap and the pile head are fixedly connected in an integrated manner; a steel reinforcement framework is pre-embedded in the concrete pile cap; the steel bar framework comprises a plurality of first stirrups, a plurality of steel bar meshes, a plurality of longitudinal bars, a plurality of inserting bars, a plurality of transverse steel bars, a spiral stirrup and an inner hole template;
the length of each transverse steel bar is greater than the diameter of an inner hole of the pile head of the test pile; the diameter of the inner hole template is equal to that of the inner hole; the height of the spiral stirrup is smaller than the length of each dowel; the spiral stirrup is fixedly sleeved outside the plurality of the inserting bars, and the plurality of the inserting bars are uniformly distributed in the circumference; the bottom ends of the plurality of the dowel bars are vertically and fixedly connected to the inner hole template; the inner hole template is inserted into the inner hole, and the top end of each dowel bar protrudes out of the top surface of the pile head; each transverse steel bar is fixedly connected with two dowel bars and erected on the top surface of the pile head;
the diameter of each first stirrup is larger than the outer diameter of the pile head; each first stirrup is fixedly sleeved outside each longitudinal bar, the plurality of first stirrups are distributed at equal intervals from top to bottom along the top end of each longitudinal bar, the plurality of longitudinal bars are uniformly distributed in the circumference and positioned outside the test pile, and the top end of each longitudinal bar and the top end of each dowel bar are positioned at the same height;
the plurality of reinforcing mesh sheets are arranged in the upper area of the top surface of the pile head at equal intervals from top to bottom, each reinforcing mesh sheet is fixedly connected with the plurality of longitudinal ribs, and the reinforcing mesh sheet at the topmost end is fixedly connected with at least the tops of the two inserting ribs.
Further, the diameter of the concrete pile cap is larger than or equal to D +200mm, wherein D is the outer diameter of the test pile, and the unit is mm.
Furthermore, the strength grade of concrete in the inner hole of the concrete pile cap is greater than or equal to C40, and the strength grade of concrete in the rest part is greater than or equal to C45.
Further, the number of the steel bar net pieces is 3-5, HRB400 steel bars are adopted, the diameter is 8mm, the length and the width of grids of the steel bar net pieces are 80mm respectively, and the distance between every two adjacent steel bar net pieces is 80 mm.
Furthermore, the first stirrups are circular, the diameter is 8mm, HRB400 steel bars are adopted, and the distance between every two adjacent first stirrups is 100 mm.
Further, the concrete strength of the concrete pile cap at the inner hole part is C40; the inserted bars are HRB400 steel bars with the diameter of 18mm, and the number of the inserted bars is six; the diameter of the spiral stirrup is 8mm, and the distance between the spiral stirrups is 150 mm.
The utility model has the advantages that: the utility model provides a novel reinforcing device for a single-pile vertical compression-resistant static load test pile head, which comprises a concrete pile cap, wherein the concrete pile cap is arranged on the pile head of a test pile, and the concrete pile cap and the pile head are fixedly connected in an integrated manner; and a steel reinforcement framework is embedded in the concrete pile cap. The concrete pile cap replaces the pile head of the original test pile to serve as the newly tested pile head, the section diameter of the concrete pile cap is larger than the diameter of the test pile, so that the concrete pile cap can bear larger pressure than the pile head of the original test pile, is not easy to crush, can test the vertical compression-resistant bearing capacity of the large-tonnage single pile more safely, accurately and assuredly, can obtain materials and construct on site during manufacturing, and has wider universality.
[ description of the drawings ]
The invention will be further described with reference to the following examples with reference to the accompanying drawings.
Fig. 1 is a cross-sectional view of a reinforcement device according to the present invention.
Fig. 2 is a schematic structural view of fig. 1 without the first stirrup and the reinforcing mesh.
Fig. 3 is a sectional view taken along line a-a in fig. 2.
Fig. 4 is a partial view of fig. 2 taken along direction B.
Fig. 5 is a cross-sectional view taken along line C-C of fig. 1.
Fig. 6 is a cross-sectional view taken along line D-D in fig. 1.
In the figure: 100. the reinforcing device comprises a reinforcing device 1, a concrete pile cap 11, a steel reinforcement framework 111, a first stirrup 112, a steel reinforcement mesh sheet 1121, a grid 113, a longitudinal reinforcement 114, a dowel bar 115, a transverse reinforcement bar 116, a spiral stirrup 117, an inner hole template 200, a test pile 201, a pile head 202 and an inner hole,
d1, the diameter of the concrete pile cap, D, the outer diameter of the test pile,
l1, the distance between two adjacent reinforcing mesh sheets,
l2, the distance between two adjacent first stirrups 111,
l3, the pitch of the helical stirrups,
l4, wall thickness,
h1, static test design elevation, H2, pile head top elevation, H3, inner hole template and concrete pile cap bottom height difference, H4, and the top of dowel bar is apart from the top of concrete pile cap.
[ detailed description ] embodiments
Referring to fig. 1 to 6, the utility model provides a novel reinforcing device 100 for a single-pile vertical compression-resistant static load test pile head, which comprises a concrete pile cap 1, wherein the concrete pile cap 1 is arranged on a pile head 201 of a test pile 200, and the concrete pile cap 1 and the pile head 201 are fixedly connected in an integrated manner; a steel reinforcement framework 11 is embedded in the concrete pile cap 1; the steel bar framework 11 comprises a plurality of first stirrups 111, a plurality of steel bar meshes 112, a plurality of longitudinal bars 113, a plurality of inserting bars 114, a plurality of transverse steel bars 115, a spiral stirrup 116 and an inner hole template 117;
the length of each transverse reinforcing steel bar 115 is larger than the diameter of an inner hole 202 of the pile head 201 of the test pile 200; the diameter of the inner bore template 117 is equal to the diameter of the inner bore 202; the height of the helical stirrup 116 is less than the length of each of the dowels 114, and the helical stirrup 116 is located within the inner bore 202; the helical stirrups 116 are fixedly sleeved outside the plurality of the dowels 114, and in a specific implementation, the helical stirrups 116 are fixed by welding, for example, and the dowels 114 are uniformly distributed circumferentially; the bottom ends of the plurality of the dowel bars 114 are vertically and fixedly connected to the inner hole template 117; the inner hole template 117 is inserted into the inner hole 202, the inner hole template 117 is used as a bottom template when the inner hole 202 is poured with concrete, and the top end of each dowel bar 114 protrudes out of the top surface of the pile head 201; each transverse reinforcing bar 115 is fixedly connected with two corresponding steel dowels 114 and is erected on the top surface of the pile head 201, so that the spiral stirrups 116, the steel dowels 114 and the inner hole template 117 are hoisted in the inner hole 202 through the transverse reinforcing bars 115.
The diameter of each first stirrup 111 is larger than the outer diameter of the pile head 201; each first stirrup 111 is fixedly sleeved outside each longitudinal rib 113, the plurality of first stirrups 111 are distributed at equal intervals from top to bottom along the top end of each longitudinal rib 113, the plurality of longitudinal ribs 113 are uniformly arranged in a circle and are positioned outside the test pile 200, and the top end of each longitudinal rib 113 and the top end of each dowel 114 are positioned at the same height;
a plurality of the mesh reinforcement 112 pieces are arranged in the upper area of the top surface of the pile head 201 at equal intervals from top to bottom, each mesh reinforcement 112 is fixedly connected with a plurality of the longitudinal ribs 113, and the topmost mesh reinforcement 112 is fixedly connected with at least the tops of two of the dowel bars 114.
By concrete pile cap 1 replaces pile head 201 of original experimental stake 200 as the pile head of new experiment, because the cross-sectional diameter of concrete pile cap 1 is greater than the diameter of experimental stake 200 to make it can bear bigger pressure than pile head 201 of original experimental stake 200, and be difficult for crushing, safer, more accurate, more guaranteed tests the vertical resistance to compression bearing capacity of large-tonnage single pile, and because each part of framework of steel reinforcement 11 all is common building material, can draw materials on the spot and construct during the preparation, the commonality is more extensive. And simultaneously will concrete pile cap 1 and experimental stake 200 are through the preparation concrete that pours during concrete pile cap 1 makes both formula as an organic whole for in follow-up single vertical resistance to compression static load test concrete pile cap 1 compares in split type, and the load of bearing is bigger, and more firm.
In the implementation, a preferred embodiment is as follows: the diameter D1 of the concrete pile cap 1 is larger than or equal to D +200mm, wherein D is the outer diameter of the test pile and is in mm, so that the diameter of the concrete pile cap 1 is determined by the outer diameter of the test pile 200.
The strength grade of the concrete in the inner hole 202 of the concrete pile cap 1 is not less than C40, and the strength grade of the concrete in the rest part is not less than C45. That is, the concrete strength grade of the inner hole 202 part to be poured can be lower than the grade of the concrete of the rest part of the concrete pile cap 1, and certainly, in the actual manufacturing process, the same grade can be adopted, and the concrete strength grade with higher strength requirement of the rest part can be adopted, so that the inner hole 202 part has higher strength and is safer, and the manufacturing cost is more expensive compared with the former one.
The number of the steel mesh sheets 112 is 3 to 5, the diameter of the steel mesh sheets is 8mm by adopting HRB400 steel bars, namely three-level steel or three-level deformed steel bars, the length and the width of the meshes 1121 of the steel mesh sheets 112 are respectively 80mm, and the distance L1 between two adjacent steel mesh sheets 112 is 80 mm.
The first stirrups 111 are circular, the diameter of the first stirrups is 8mm, the HRB400 steel bars are adopted, and the distance L2 between every two adjacent first stirrups 111 is 100 mm.
The concrete strength of the concrete pile cap 1 at the inner hole 202 part is C40; the inserted bars 114 are HRB400 steel bars with the diameter of 18mm, and the number of the inserted bars 114 is six; the diameter of the spiral stirrup 116 is 8mm, the distance L3 is 150mm, and the thread pitch is L3.
Example (b):
the number of the steel mesh pieces 112 is 3, the HRB400 steel bars, i.e., the three-level steel or the three-level deformed steel bars, are adopted, the diameter of each steel mesh piece is 8mm, the length and the width of each mesh 1121 of each steel mesh piece 112 are 80mm, and the distance L1 between every two adjacent steel mesh pieces 112 is 80 mm.
The first stirrups 111 are circular, the diameter of the first stirrups is 8mm, the HRB400 steel bars are adopted, and the distance L2 between every two adjacent first stirrups 111 is 100 mm.
The concrete strength of the concrete pile cap 1 at the inner hole 202 part is C40; the inserted bars 114 are HRB400 steel bars with the diameter of 18mm, and the number of the inserted bars 114 is six; the diameter of the spiral stirrup 116 is 8mm, and the spacing L3 is 150 mm.
The manufacturing method of the concrete pile cap 1 adopts a field manufacturing mode: the static load test design elevation H1 is 500 mm; the top surface elevation H2 of the pile head 201 is 800 mm; the height difference H3 between the inner hole template 117 and the bottom surface of the concrete pile cap 1 is 500 mm; the height H4 between the top end of the dowel bar 114 and the top surface of the concrete pile cap 1 is 50 mm; the diameter D1 of the concrete pile cap 1 is D +200 mm; two transverse steel bars 115 are adopted, and HRB400 steel bars with the diameter of 22mm are adopted; the diameter of the inner hole template 117 is equal to the outer diameter D of the test pile, and the thickness of the inner hole template is 3 mm;
step 2, welding two transverse steel bars 115 as shown in fig. 4;
step 3, welding the bottom ends of the dowel bars 114 of step 6 on the inner hole template 117;
step 6, welding the first stirrups 111 at the upper ends and the lower ends of the 6 longitudinal ribs 113, wherein the two ends are respectively flush, then welding the first stirrups in the middle at equal intervals of 100mm, and fully arranging the first stirrups side by side, wherein if the interval between the last first stirrup 111 and the adjacent first stirrup 111 is not 100mm, the last first stirrup 111 does not have a relation;
step 7, hoisting the manufactured steel reinforcement framework 11 to the pile head 201, inserting the inner hole template 117 into the inner hole 202, and building the top surface of the pile head 201 through two transverse steel reinforcements 115;
step 6, erecting a template on the outer side of the test pile 200 according to the top surface elevation H2 of the pile head 201 and the diameter D1 of the concrete pile cap 1; the height from the top end of the dowel bar 114 to the top end of the formwork is equal to 50mm from H4;
and 7, uniformly pouring concrete of C50 grade, and after the age of the concrete is reached, removing the formwork to test. For example, the outer diameter D of the test pile 200 is 500mm, the wall thickness L4 is 125mm, the maximum test load under static load is 4500kN, and the concrete strength is calculated: 4500000N/(3.14 mm 500mm/4) ═ 22.93MPa <23.1MPa, and the concrete strength grade is C50.
Of course, the longitudinal rib 113 and the first stirrup 111, and the dowel 114 and the spiral stirrup 116 may be tied and fixed by iron wires.
To illustrate this point, the filling of the concrete cross-section of the concrete pile cap 1 shown in fig. 1 and 2 is only indicated by the filling in the inner hole 202, and the rest is omitted for convenience of illustration.
Although specific embodiments of the present invention have been described, it will be understood by those skilled in the art that the specific embodiments described are illustrative only and are not limiting upon the scope of the invention, and that equivalent modifications and variations can be made by those skilled in the art without departing from the spirit of the invention, which is to be limited only by the claims appended hereto.
Claims (6)
1. The utility model provides a novel reinforcement of vertical resistance to compression static test pile head of single pile device which characterized in that: the device comprises a concrete pile cap, wherein the concrete pile cap is arranged on a pile head of a test pile and is fixedly connected with the pile head in an integrated manner; a steel reinforcement framework is pre-embedded in the concrete pile cap; the steel bar framework comprises a plurality of first stirrups, a plurality of steel bar meshes, a plurality of longitudinal bars, a plurality of inserting bars, a plurality of transverse steel bars, a spiral stirrup and an inner hole template;
the length of each transverse steel bar is greater than the diameter of an inner hole of the pile head of the test pile; the diameter of the inner hole template is equal to that of the inner hole; the height of the spiral stirrup is smaller than the length of each dowel; the spiral stirrup is fixedly sleeved outside the plurality of the inserting bars, and the plurality of the inserting bars are uniformly distributed in the circumference; the bottom ends of the plurality of the dowel bars are vertically and fixedly connected to the inner hole template; the inner hole template is inserted into the inner hole, and the top end of each dowel bar protrudes out of the top surface of the pile head; each transverse steel bar is fixedly connected with two dowel bars and erected on the top surface of the pile head;
the diameter of each first stirrup is larger than the outer diameter of the pile head; each first stirrup is fixedly sleeved outside each longitudinal bar, the plurality of first stirrups are distributed at equal intervals from top to bottom along the top end of each longitudinal bar, the plurality of longitudinal bars are uniformly distributed in the circumference and positioned outside the test pile, and the top end of each longitudinal bar and the top end of each dowel bar are positioned at the same height;
the plurality of reinforcing mesh sheets are arranged in the upper area of the top surface of the pile head at equal intervals from top to bottom, each reinforcing mesh sheet is fixedly connected with the plurality of longitudinal ribs, and the reinforcing mesh sheet at the topmost end is fixedly connected with at least the tops of the two inserting ribs.
2. The novel reinforcing device for the single-pile vertical compression-resistant static load test pile head as claimed in claim 1, is characterized in that: the diameter of the concrete pile cap is larger than or equal to D +200mm, wherein D is the outer diameter of the test pile, and the unit is mm.
3. The novel reinforcing device for the single-pile vertical compression-resistant static load test pile head as claimed in claim 1, is characterized in that: the strength grade of concrete in the inner hole in the concrete pile cap is more than or equal to C40, and the strength grade of concrete in the rest part is more than or equal to C45.
4. The novel reinforcing device for the single-pile vertical compression-resistant static load test pile head as claimed in claim 1, is characterized in that: the number of the reinforcing steel bar net pieces is 3-5, HRB400 reinforcing steel bars are adopted, the diameter is 8mm, the length and the width of grids of the reinforcing steel bar net pieces are 80mm respectively, and the distance between every two adjacent reinforcing steel bar net pieces is 80 mm.
5. The novel reinforcing device for the single-pile vertical compression-resistant static load test pile head as claimed in claim 1, is characterized in that: the first stirrups are circular, the diameter is 8mm, the HRB400 steel bars are adopted, and the distance between every two adjacent first stirrups is 100 mm.
6. The novel reinforcing device for the single-pile vertical compression-resistant static load test pile head as claimed in claim 1, is characterized in that: the concrete strength of the concrete pile cap positioned in the inner hole part is C40; the inserted bars are HRB400 steel bars with the diameter of 18mm, and the number of the inserted bars is six; the diameter of the spiral stirrup is 8mm, and the distance between the spiral stirrups is 150 mm.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201920857493.9U CN210459324U (en) | 2019-06-06 | 2019-06-06 | Novel reinforcing device for single-pile vertical compression-resistant static load test pile head |
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| CN201920857493.9U CN210459324U (en) | 2019-06-06 | 2019-06-06 | Novel reinforcing device for single-pile vertical compression-resistant static load test pile head |
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| CN210459324U true CN210459324U (en) | 2020-05-05 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111663575A (en) * | 2020-06-23 | 2020-09-15 | 中国五冶集团有限公司 | Construction method for post-forming waterproof construction of pile head |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111663575A (en) * | 2020-06-23 | 2020-09-15 | 中国五冶集团有限公司 | Construction method for post-forming waterproof construction of pile head |
| CN111663575B (en) * | 2020-06-23 | 2021-09-21 | 中国五冶集团有限公司 | Construction method for post-forming waterproof construction of pile head |
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