WO2014194629A1

WO2014194629A1 - Prestressed high-strength concrete tubular pile, end plate, concrete material, and method for producing tubular pile

Info

Publication number: WO2014194629A1
Application number: PCT/CN2013/089160
Authority: WO
Inventors: 吴建生
Original assignee: Wu Jiansheng
Priority date: 2013-06-04
Filing date: 2013-12-12
Publication date: 2014-12-11
Also published as: CN103276727A

Abstract

A prestressed high-strength concrete tubular pile comprises a tubular pile body (1) consisting of a rebar-weaved cage and a concrete material. A proportion of an outer diameter of a cross section of the tubular pile body (1) to a wall thickness is 40:10-13. A vertical bearing capacity of a pile body is improved in a case in which a volume of the tubular pile is not increased. The present invention also provides an end plate applicable to the tubular pile, a concrete material composition of the tubular pile, and a method for producing the tubular pile.

Description

Prestressed high-strength concrete pipe pile, end plate and concrete material and pipe pile production method

[0001] The present invention belongs to the technical field of construction, and relates to the technical field related to pipe piles, in particular, pipe piles, end plates matched with pipe piles, dip material compositions applied to the pipe piles, and production of the pipe piles method.

Background technique

[0002] Prestressed high-strength concrete pipe piles are characterized by short manufacturing period, reliable quality, convenient management, industrial production, industrial production and low cost. It is widely used in various building engineering foundations. However, in the existing piled high-strength concrete pipe piles, when hitting the hard interlayer in the geological pile, the piles often appear due to the low vertical bearing capacity of the pile body. Or do not wear a geological hard interlayer, and stop the pile end on the hard interlayer, resulting in pile foundation defects. This is a technical deficiency of the existing prestressed high strength concrete pipe piles.

Summary of the invention

[0003] An object of the present invention is to provide a prestressed high-strength concrete pipe pile having a high ultimate bearing capacity of a pile body, good bending and folding resistance, and capable of penetrating a geological hard interlayer.

[0004] Another object is to provide an end plate of a prestressed high strength concrete pipe pile that can be matched and adapted to a prestressed high strength concrete pipe pile.

Still another object is to provide a dip composition for use in the prestressed high strength concrete pipe pile.

Still another object is to provide a method of producing the prestressed high strength concrete pipe pile.

[0007] The various technical objects of the present invention are achieved one by one according to the following technical solutions: A prestressed high strength concrete pipe pile, comprising a pipe pile body composed of a steel cage and a dip material, characterized in that: the pipe pile The ratio of the outer diameter of the cross section of the body to the wall thickness is 40: 10-13.

[0008] The ratio of the cross-sectional outer diameter to the wall thickness of the pipe pile body is 40:11.

[0009] The dip consists of cement, medium sand, grinding to 4000-4200 purpose frosting powder, crushed stone, superplasticizer and water; the content of each component is calculated per cubic meter of dip, wherein:

Cement 340-400Kg,

Medium sand 670- 730Kg,

Grinding to 4000-4200 mesh frosting powder 120Kg,

Crushed stone 1200—1280Kg,

Water 141-161Kg,

Superplasticizer 9.6- l lKg.

[0010] The content of each component is calculated per cubic meter of material, wherein: cement 340Kg, medium sand 730Kg, 4000- 4200 mesh frosting powder 120Kg, crushed stone 1220Kg, water 141Kg, high efficiency water reducing agent 9.6Kg.

[0011] The optimum degree of the abrasive to be ground to 4000-4200 mesh is 4200 mesh.

[0012] A prestressed high-strength fistula pile end plate, comprising an end plate, wherein the end plate is provided with an inner hole of the end plate, and the end plate is further provided with a main reinforcement hole and a steel hole, wherein the end is: The ratio of the outer diameter of the cross section of the plate to the wall thickness is 40:10-13.

[0013] The ratio of the outer diameter of the cross-section of the end plate to the wall thickness is 40:11.

[0014] A prestressed high-strength concrete pipe pile dip material composition, including cement, medium sand, grinding to 4000-4200 purpose frosted powder, crushed stone, superplasticizer and water; Calculation of cubic rice materials, including: cement 340-400Kg, medium sand 670-730Kg, grinding to 4000-4200 mesh frosting powder 120Kg, crushed stone 1200-1280Kg, water 141-161Kg, high-efficiency water reducing agent 9.6-llKg.

[0015] The content of each component is calculated per cubic meter of material, wherein: cement 340Kg, medium sand 730Kg, grinding to 4000-4200 mesh frosting powder 120Kg, crushed stone 1220Kg, water 141Kg, high efficiency water reducing agent 9.6Kg.

[0016] A method for producing a prestressed high strength concrete pipe pile, comprising the following steps:

Step A: According to the outer diameter and length of the prestressed high-strength concrete pipe pile, the coiled steel bars are cut, and then the steel cage is clamped, and the ratio of the outer diameter of the cross-section of the pipe pile body to the wall thickness is 40:10-13 , the most preferred ratio is 40: 11;

Step B: blending according to the ratio of the content of the components described in claim 3 or claim 4, and stirring into a slump of 2 to 4 cm;

Step C: placing the steel cage obtained in step A into a molding die, and fabricating the material obtained in step B in a molding die, and then clamping the mold;

Step D: prestressing the steel bars in the pipe pile, then performing the centrifugal forming of the pipe piles, and demoulding after forming; Step E: performing high temperature steaming of the pipe piles after the demoulding in step D, and then performing inspection For the finished product.

[0017] Compared with the prior art, the present invention can achieve the following beneficial effects:

1. The prestressed high-strength concrete pipe pile increases the vertical ultimate bearing capacity of the pile body without increasing the volume, with the outer diameter as

For example, a 400mm pipe pile can be tested to achieve a vertical ultimate bearing capacity of 5000K.

[0018] 2. Compared with the existing pipe piles with the same performance, the production cost is greatly reduced.

[0019] 3. Compared with the existing pipe piles of the same performance, since the volume is constant, the storage space can be saved.

[0020] 4. 砼 Strength level C85.

DRAWINGS

[0021] The present invention will be further described in detail below with reference to the accompanying drawings.

1 is a schematic cross-sectional view of a prestressed high strength concrete pipe pile of the present invention.

2 is a schematic cross-sectional view of an end plate of a prestressed high strength concrete pipe pile of the present invention. [0024] In the figure, 1. pipe pile body, 2. pipe pile wall thickness, 3. end plate, 4. main rib anchor hole, 5. steel hole.

detailed description

[0025] The technical solution of the present invention includes the following categories:

Firstly, a pre-stressed high-strength concrete pipe pile with high vertical bearing capacity, good bending and folding resistance, and capable of penetrating the geological hard interlayer is provided.

[0026] Secondly, an end plate of a prestressed high strength concrete pipe pile capable of cooperating with and adapting to a prestressed high strength concrete pipe pile is provided.

[0027] Third, a tanning composition applied to the prestressed high strength concrete pipe pile is provided.

[0028] Fourth, a method for producing the prestressed high strength concrete pipe pile is provided.

[0029] The various technical objects of the present invention are achieved one by one according to the following technical solutions: A prestressed high-strength concrete pipe pile, comprising a pipe pile body 1 composed of a steel cage and a dip material, a cross section of the pipe pile body 1 The ratio of the outer diameter to the wall thickness 2 is 40:10-13. The optimum pipe pile body 1 has a ratio of the outer diameter of the cross section to the wall thickness 2 of 40:11.

[0030] The dip material includes cement, medium sand, grinding to 4000-4200 purpose frosting powder, crushed stone, superplasticizer and water; the content of each component is calculated per cubic meter of material, wherein: cement 340-400Kg , Zhongsha 670-730Kg, grinding to 4000-4200 purpose frosting powder 120Kg, crushed stone 1200-1280Kg, water 141-161Kg, high-efficiency water reducing agent 9.6-llKg.

[0031] The content of each component is calculated per cubic meter of buckwheat. The optimum ratio is 340Kg of cement, 730Kg of medium sand, 120Kg of 400-4200 mesh frosting powder, 1220Kg of crushed stone, 141Kg of water, and 9.6Kg of superplasticizer.

[0032] The ratio of the above five embodiments can be matched to the dip of the present invention.

[0033] The sanding powder is ground to 4000-4200 mesh for selection with an optimum precision of 4200 mesh.

[0034] As shown in FIG. 1 and FIG. 2, the prestressed high-strength fistula pile end plate comprises an end plate 3, wherein the end plate is provided with an inner hole of the end plate, and the end plate is further provided with a main reinforcement hole 4 and a steel bar. The ratio of the outer diameter of the end plate to the wall thickness of the end plate is 40:10 - 13 <

[0035] The ratio of the outer diameter of the cross-section of the end plate to the wall thickness is 40:11.

[0036] A prestressed high-strength concrete pipe pile material composition, including cement, medium sand, grinding to 4000-4200 purpose grinding Sand powder, crushed stone, superplasticizer and water; the content of each component is calculated per cubic meter of material, of which: 340-400Kg of cement, 670-730Kg of medium sand, 120Kg of frosted powder ground to 4000-4200 mesh, Crushed stone 1200 - 1280Kg, water 141 - 161Kg, high efficiency water reducing agent 9.6 - l lKg.

[0037] The content of each component is calculated per cubic meter of material, wherein: cement 340Kg, medium sand 730Kg, grinding to 4000-4200 mesh frosting powder 120Kg, crushed stone 1220Kg, water 141Kg, high efficiency water reducing agent 9.6Kg.

[0038] A method for producing a prestressed high strength concrete pipe pile, comprising the following steps:

Step A: According to the outer diameter and length of the prestressed high-strength concrete pipe pile, the coiled steel bars are cut, and then the steel cage is clamped, and the ratio of the outer diameter of the cross-section of the pipe pile body to the wall thickness is 40: 10-13 , the most preferred ratio is 40: 11;

[0039] Two examples of applying the technical solutions of the present invention are provided below, and the technical objects and technical effects that can be achieved according to the technical solution of the present invention can also be viewed in the field.

[0040] Example A.

[0041] I. Project Overview: Puning Huirun Real Estate Co., Ltd. plans to build Huishang·Wenzhu North Road Commercial and Residential Building, located at the southeast side of the intersection of Huancheng North Road and Wenzhu North Road in Puning City. 22653.33m2. The project consists of several 26-32 high-rise residential buildings and 3-5 floors of supporting structures, frame-shear-frame structure, and a basement in the whole district.

[0042] II. Evaluation of foundation rock soil layer: According to the exposure data of the borehole, the first miscellaneous, prime filling, loose, containing gravel and a small amount of domestic garbage, is the bad soil layer of the site; the second layer of cultivated topsoil, mainly by soft Plastic ~ plastic clay composition, poor engineering mechanics; 3rd layer of silt, high compressibility, uneven subsidence in case of strong earthquake, engineering mechanical properties are very poor; 4th layer of clay, silty clay, soft plastic ~ plastic 5, coarse sand, medium density, layer thickness 0.80~8.20m, large thickness variation, slightly better engineering mechanics; 6th layer clay, silty clay, plastic, engineering mechanics slightly better; 7 layers of sand, coarse sand, ash ~ gray white, gray yellow, yellow brown, saturated, medium dense ~ dense, mainly medium and coarse sand, containing mud. The top of the layer has a depth of 20.80~21.00m, and the bottom of the layer has a depth of 22.60~28.76m, and the layer thickness is 1.40~7.76m. The standard penetration test was performed 88 times. After the correction, the number of shots was N=16.9~32.3, and the average value was 23.9. The distribution is relatively stable, the thickness varies greatly, and the engineering mechanical properties are better; the 8th layer clay, silty clay, plastic, engineering mechanical properties; the 9th layer of sand, coarse sand, medium density ~ dense, layer thickness 1.10~7.10 m, large thickness variation, good engineering mechanics; 10th layer clay, silty clay, plastic, engineering force The general nature of the study; the (11) layer of gravel, sandy cohesive soil (cohesive soil), plastic ~ hard plastic, distribution is relatively stable, engineering mechanical properties are slightly better, but easy to soften and disintegrate with water; (1) fully weathered granite The lamprophyre is a very soft rock with unstable distribution and good engineering mechanics. The (13) layer of strongly weathered granite is soft rock with large thickness variation, good engineering mechanics, but deep burial; 14) The weathered granite in the layer is a hard rock with good engineering mechanical properties and is a hard base for the site.

[0043] III. Design requirements: The design unit carries out the basic design according to the relevant data, and adopts the PHC pipe pile foundation. The specific requirements are as follows: Φ400 pipe pile end is supported in the coarse sand layer of the 9th layer, and the pile length is counted from the natural ground. About 37 to 42 meters, enter the holding layer 0.5 to 1 meter. The pile sinking method is a static pile. The vertical bearing capacity characteristic value of single pile: Φ400 is 1200KN, and the wall thickness of pipe pile is 95mm.

[0044] IV. Construction Process and Measures: The construction unit adopts a ZJY800 static pressure pile machine to carry out normal construction according to site conditions and design requirements. Since the geological data shows that the 5th and 7th layers are uneven sand interlayers, they cannot be used as pile bearing layers, so the design requires that the pile ends be supported in the coarse sand layer in the 9th layer. In this way, the pipe pile construction must pass through the sand interlayer of the 5th and 7th layers, and the maximum thickness of the sand interlayer of the 5th and 7th layers reaches 8.2 meters, which is very difficult for the construction of the static pressure pile. Therefore, we carried out the test piles according to the usual conditions. As a result, the pile pile force of the pile pile entering the sand layer of the seventh layer has reached 4000KN and there is no way to pass through the interlayer. At this time, the pile driving force has greatly exceeded the ultimate bearing capacity of the pile body, and the pile will continue to be piled up.

[0045] The technical solution provided by the invention is adopted, that is, a prestressed high strength concrete pipe pile. The product has its own ultimate vertical bearing capacity (4400K), good bending and folding resistance, and is an ideal choice for geological foundations with hard interlayers. Therefore, we used the pipe pile of the present invention for pressure test, and the result smoothly passed through the sand interlayers of the 5th and 7th layers, and the maximum pile force reached 5200K during the process of crossing the sand interlayer. There was no explosive pile during the construction process.

[0046] V. Summary: Through trial use, the prestressed high-strength concrete pipe pile of the present invention is really good, because it has the characteristics of high ultimate bearing capacity, good bending resistance and bending resistance, it can be used not only To solve the problem of thick sand interlayer, it can also solve many complicated geological layers (easy to produce additional bending moments and horizontal shearing forces). It is the gospel of the pile foundation.

[0047] Example B.

[0048] I. Project Overview: The "Lin Chulong Factory Building" project proposed by Mr. Lin Chulong is located at 324 Xiashan Road, National Highway, Chaonan District, Shantou City.

[0049] 2. Foundation rock soil evaluation: According to the hole exposure data, the first layer is filled with soil, loose ~ slightly compacted, poor engineering mechanics; the second layer of silty clay, uneven distribution, small thickness, engineering Poor mechanical properties; 3rd layer of silt and 5th layer of silty soil, flow plasticity, high compressibility, engineering mechanical properties are extremely poor; 4th layer consists of cohesive soil and sandy soil, uneven distribution, each sand layer is The lens body is staggered, the thickness changes greatly, the density difference is obvious, the engineering mechanical properties are poor~ general; the 6th layer is coarse sand, medium dense~ dense, unevenly distributed, large thickness variation, and the thickness of the local layer is larger. , good engineering mechanics; 7th layer of clay, silty clay, plastic, uneven distribution, large local thickness, general engineering mechanical properties; The 8th layer of gravel cohesive soil, plasticized ~ hard plastic, uneven distribution, large thickness change, the strength of the foundation soil is gradually enhanced, the engineering mechanical properties are generally better ~ the 9th layer of strongly weathered granite, hard, uneven distribution, Large thickness changes, good engineering mechanics; 10th layer of weathered granite, hard, thick, and good engineering mechanics.

[0050] III. Design requirements: The design unit carries out the basic design according to the relevant data, and adopts the PHC pipe pile foundation. The specific requirements are as follows: Φ400 pipe pile end is supported by the 8th layer gravel cohesive soil, and the pile length is calculated from the natural ground. 38~46 meters, enter the holding layer 0.5~1 meters. The pile sinking method is a static pile. The characteristic value of vertical bearing capacity of single pile is Φ400 is 1000KN, and the wall thickness of pipe pile is 95mm.

[0051] IV. Construction Process and Measures: The construction unit adopts a ZJY800 static pressure pile machine to carry out normal construction according to site conditions and design requirements. Since the geological data shows that the sixth layer is uneven sand and coarse sand interlayer, it cannot be used as a pile bearing layer. Therefore, the design requires that the pile end be supported by the eighth layer of gravel clay. This requires that the pipe pile construction must pass through the sand layer of the sixth layer, and the maximum thickness of the sand layer of the sixth layer reaches 5.4 meters, so that the requirements for the pile force must be very high. Therefore, we carried out the test piles according to the usual conditions. As a result, when the piles entered the sand interlayer of the sixth layer, the pile driving force had reached 3800 KN and there was no way to pass through the interlayer. Therefore, we use the pipe pile of the present invention for pressure test, and smoothly pass through the sixth layer of the sand interlayer during the process of crossing the sand interlayer, usually under the pressure of 4200-5000KN. There were no abnormalities during the construction process. Due to the use of the pipe pile of the present invention, we successfully completed the construction task.

Claims

Claim

A prestressed high-strength concrete pipe pile, comprising a pipe pile body composed of a steel cage and a shovel, characterized in that: the ratio of the outer diameter of the cross-section of the pipe pile body to the wall thickness is 40: 10-13 .

2. The prestressed high strength concrete pipe pile according to claim 1, wherein: the ratio of the outer diameter of the cross section of the pipe pile body to the wall thickness is 40:11.

3. The prestressed high strength concrete pipe pile according to claim 1 or 2, wherein: the material comprises cement, medium sand, sanding powder of 4000-4200 mesh, crushed stone, superplasticizer and water. The content of each component is calculated per cubic meter of feed, wherein:

Cement 340-400Kg,

Medium sand 670- 730Kg,

Grinding to 4000-4200 mesh frosting powder 120Kg,

Crushed stone 1200—1280Kg,

Water 141-161Kg,

Superplasticizer 9.6- l lKg.

4. The prestressed high strength concrete pipe pile according to claim 3, wherein: the content of each component is calculated per cubic meter of material, wherein: 340 Kg of cement, 730 Kg of sand, grinding to 4000-4200 Powder 120Kg, crushed stone 1220Kg, water 141Kg, high-efficiency water reducing agent 9.6Kg.

5. The prestressed high strength concrete pipe pile according to claim 4, wherein: the sanding powder having a grinding degree of 4000-4200 is optimally 4200 mesh.

6. A prestressed high strength concrete pipe pile end plate, comprising an end plate, wherein the end plate is provided with an inner hole of the end plate, and the end plate further comprises a main reinforcement hole and a steel hole, wherein the end plate The ratio of the outer diameter of the cross section to the wall thickness is 40: 10-13.

7. The prestressed high strength concrete pipe pile end plate according to claim 6, wherein: the ratio of the outer diameter of the end plate to the wall thickness is 40:11.

8. A pre-stressed high-strength concrete pipe pile dip material composition, including cement, medium sand, grinding to 4000 4200 purpose sanding powder, crushed stone, superplasticizer and water; the content of each component is per cubic meter Dip calculation, including: cement 340-400Kg, medium sand 670-730Kg, grinding to 4000-4200 purpose frosting powder 120Kg, crushed stone 1200-1280Kg, water 141 161Kg, high-efficiency water reducing agent 9.6- l lKg.

9. The pre-stressed high strength concrete pipe pile material composition according to claim 8, wherein: the content of each component is calculated per cubic meter of material, wherein: 340 Kg of cement, 730 Kg of medium sand, ground to 4000-4200 Purpose Scrub powder 120Kg, crushed stone 1220Kg, water 141Kg, high-efficiency water reducing agent 9.6Kg.

10. A method for producing a prestressed high strength concrete pipe pile, comprising the following steps:

Claims