CN114032943A - Cold region fabricated concrete bearing platform and miniature pile combined foundation - Google Patents
Cold region fabricated concrete bearing platform and miniature pile combined foundation Download PDFInfo
- Publication number
- CN114032943A CN114032943A CN202111387577.9A CN202111387577A CN114032943A CN 114032943 A CN114032943 A CN 114032943A CN 202111387577 A CN202111387577 A CN 202111387577A CN 114032943 A CN114032943 A CN 114032943A
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- bearing platform
- steel
- connecting seat
- concrete
- column
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D27/00—Foundations as substructures
- E02D27/10—Deep foundations
- E02D27/12—Pile foundations
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D27/00—Foundations as substructures
- E02D27/10—Deep foundations
- E02D27/12—Pile foundations
- E02D27/14—Pile framings, i.e. piles assembled to form the substructure
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D5/00—Bulkheads, piles, or other structural elements specially adapted to foundation engineering
- E02D5/22—Piles
- E02D5/34—Concrete or concrete-like piles cast in position ; Apparatus for making same
- E02D5/38—Concrete or concrete-like piles cast in position ; Apparatus for making same making by use of mould-pipes or other moulds
Abstract
A cold region assembled concrete bearing platform and micro pile combined foundation belongs to the technical field of cold region foundation engineering and structural engineering. The assembled column member which is stacked up and clamped from top to bottom is provided with a hollow cavity for pouring self-compacting concrete and is connected with the bearing platform bottom plate through prestressed steel bars, a cross connecting seat connected with the bearing platform bottom plate is arranged on the outer side of the assembled column member, an assembly part splicing steel plate which is arranged in a surrounding mode is arranged outside the bearing platform bottom plate, a steel reinforcement cage is arranged in the assembly part splicing steel plate, the steel reinforcement cage is connected with the cross connecting seat, and the upper end of the steel reinforcement cage is provided with a bearing platform upper cover plate; the cross connecting seat is connected with the assembly part splicing steel plate through a connecting steel bar. The invention reduces the foundation treatment, the use of the large-diameter cast-in-place pile and the construction cost, avoids the problem of large-volume integral casting of concrete in deep muddy soil areas in cold regions, is not limited by the environmental temperature, the geological environment, the concrete hydration reaction and the construction site, improves the integral bearing capacity, rigidity, crack resistance and service performance of the concrete, and saves the cost and the use of materials.
Description
Technical Field
The invention relates to a cold region assembled concrete bearing platform and micro pile combined foundation, and belongs to the technical field of cold region foundation engineering and structural engineering.
Background
With the rapid development of the northeast city construction of China, the cooperative promotion of the town integration, the revivification of old industrial bases and the emergence of a large number of foundation pit projects, the foundation faces more complicated and changeable geological conditions, particularly the deep soft soil stratum represented mainly by Daqing city. Due to underground oil exploitation and underground water loss and rainwater backflow, large-area deep and thick soft soil areas, such as mucky soil, silt, soft cohesive soil and the like, appear in all corners of a city, soft soil has the characteristics of high natural water content, poor water permeability, high compressibility, low shear strength, obvious rheological property and the like, and along with the cooperative promotion of urbanization, the construction of urban foundation pit engineering and the basic model selection face a plurality of difficulties and challenges.
At present, a drainage consolidation and dynamic compaction replacement filling method is often adopted for foundation treatment in deep and soft soil areas, and a large-diameter cast-in-place pile is often adopted for construction in the aspect of a pile body. The deep mucky soil and the cold region low-temperature environment bring series problems to the construction quality of the pile body and the foundation, such as uneven settlement of the foundation, concrete pouring quality of the pile body, low bearing capacity, frozen and pulled foundation and the like. Once the crack is generated on the foundation, the crack growth is accelerated under the influence of water and low temperature in the soil body, so that the concrete foundation is damaged. In addition, the pile foundation belongs to concealed engineering, the pile foundation is not easy to perceive after cracks appear in the foundation or on the surface of the pile foundation, the subsequent repair difficulty is high, related problems need to be solved urgently, and the durability and the long-term service performance of the foundation engineering in cold regions are also seriously influenced and limited.
The assembled reinforced concrete structure becomes one of the important directions of the development of the building structure in China, is beneficial to the development of the industrialization of the building in China, improves the production efficiency, saves energy, develops green and environment-friendly buildings, and is beneficial to improving and ensuring the quality of the building engineering. Compared with a cast-in-place construction method, the assembly type construction method can save energy and materials, reduce field interference, has high concrete quality, can effectively solve the problem of construction quality of the reinforced concrete foundation, and improves the bearing capacity and the corrosion resistance of the foundation. Therefore, the fabricated reinforced concrete structure can be used to solve the above technical problems.
Disclosure of Invention
In order to solve the problems in the background art, the invention provides a cold region fabricated concrete bearing platform and micro pile combined foundation.
The invention adopts the following technical scheme: a cold region fabricated concrete bearing platform and micro pile combined foundation comprises a pile unit and a bearing platform unit; the pile unit comprises a bearing platform column and a miniature pile; the lower end of the bearing platform column is connected with the bearing platform unit, and the lower end of the bearing platform unit is provided with a plurality of micro piles.
Compared with the prior art, the invention has the beneficial effects that:
the invention can effectively solve the complex and changeable construction and technical problems in the foundation treatment and foundation engineering construction process in the special geological environment of the cold area, reduces the foundation treatment, the use of large-diameter cast-in-place piles and the engineering cost, avoids the problems of poor concrete quality, low bearing capacity, low material frost resistance and the like caused by large-volume integral casting of concrete in the deep muddy soil area of the cold area, can carry out splicing construction on the deep soft soil layer of the cold area in an integral assembly mode, is not limited by the conditions of environmental temperature, geological environment, concrete hydration reaction, construction site and the like, greatly improves the integral bearing capacity, rigidity, crack resistance and service performance of the concrete, and has the advantages of light weight, high strength, high construction quality and efficiency, and cost saving and material use.
Drawings
FIG. 1 is a schematic structural view of the present invention;
FIG. 2 is a schematic view showing the connection of the fabricated column member to the cap unit;
FIG. 3 is a schematic structural view of a reinforcement cage;
FIG. 4 is a schematic view of the cross connecting seat;
FIG. 5 is a schematic view of the connection relationship between the assembled splice steel plate and the bearing platform bottom plate;
FIG. 6 is a schematic view of the connection between the cruciform attachment socket and the bottom plate of the platform.
Detailed Description
The technical solutions in the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the invention, rather than all embodiments, and all other embodiments obtained by those skilled in the art without any creative work based on the embodiments of the present invention belong to the protection scope of the present invention.
A cold region fabricated concrete bearing platform and micro pile combined foundation comprises a pile unit and a bearing platform unit; the pile unit comprises a bearing platform column 1 and a miniature pile 9; the lower end of the bearing platform column 1 is connected with the bearing platform unit, and the lower end array of the bearing platform unit is provided with a plurality of micro-piles 9.
The bearing platform column 1 comprises prestressed reinforcement 2, self-compacting concrete 3, anchor bolts 4 and a plurality of assembled column components 5; the assembled column members 5 are arranged in an up-and-down stacking manner, a hollow cavity is formed in the middle of each assembled column member 5, and self-compacting concrete 3 is poured into the hollow cavity; the lower ends of all the assembled column members 5 except the lowermost end are integrally provided with a clamping block, the upper ends of all the assembled column members 5 except the uppermost end are provided with a clamping groove 6, and every two adjacent assembled column members 5 are connected in a manner that the clamping blocks are inserted into the corresponding clamping grooves 6 in a matching manner; the outer wall of every assembled column component 5 all runs through respective thickness direction and is equipped with the component reinforcing bar hole, and the component reinforcing bar hole one-to-one of a plurality of assembled column components 5 sets up, the lower extreme of prestressing steel 2 passes behind the component reinforcing bar hole that corresponds and is connected with the cushion cap bottom plate 15 of cushion cap unit to the upper end of prestressing steel 2 is passed through crab-bolt 4 and is connected with the up end that is located the assembled column component 5 of top, and prestressing steel 2 adopts the welded mode to carry out length extension.
The bearing platform unit comprises a bearing platform upper cover plate 7, connecting steel bars 8, a steel bar cage 11, an assembly part splicing steel plate 10, a cross connecting seat 14 and a bearing platform bottom plate 15; the lower end of the bearing platform column 1 is fixedly connected with the middle of a bearing platform bottom plate 15, a cross connecting seat 14 is sleeved on the outer side of the lower end of the bearing platform column 1, the lower end of the cross connecting seat 14 is connected with the bearing platform bottom plate 15, an assembly part splicing steel plate 10 is arranged on the outer wall of the bearing platform bottom plate 15 along the circumferential direction of the outer wall, the assembly part splicing steel plate 10 is arranged in a surrounding mode, a reinforcement cage 11 is arranged inside the assembly part splicing steel plate 10, the lower end of the reinforcement cage 11 is connected with the cross connecting seat 14 through a preformed hole 12 and a reinforcement cage fixing hole 13, and a bearing platform upper cover plate 7 is arranged at the upper end of the reinforcement cage 11 after C40 concrete is poured and sealed; cruciform connection seat 14 runs through its transversely and vertically all is equipped with a plurality of connecting seat reinforcing bar holes, every connecting seat reinforcing bar downthehole connecting reinforcement 8 that all is equipped with HRB400, every connecting reinforcement 8's both ends all set up in the outside of assembly part concatenation steel sheet 10 to connect fixedly through the crab-bolt.
The prestressed reinforcement 2 connects the bearing platform bottom plate 15, the cross connecting seat 14 and the bearing platform column 1.
The connecting steel bars 8 connect the assembly spliced steel plate 10, the steel reinforcement cage 11, the cruciform coupling socket 14 and the bearing column 1.
The fabricated column member 5 is prefabricated in a factory, is made of reinforced concrete, has the concrete strength grade of C40, and is processed by a post-tensioning method for the prestressed reinforcement 2.
The fineness modulus of the fine aggregate in the self-compacting concrete 3 is 3, and the apparent density is 2620kg/m3The coarse aggregate is large stone with a grain size of 10-20mmMixing with small stones with the size fraction of 5-10mm according to the proportion of 6: 4 a crush index of 8.3% and an apparent density of 2700kg/m3The method comprises the steps of adopting a polycarboxylic acid type high-efficiency water reducing agent, weighing the using amounts of sand, stone, rubber materials, water and additives of 15L of concrete according to a design mixing ratio, carrying out slurry coating by using mortar with the same water-rubber ratio, sequentially putting weighed sand and powder into a stirrer, starting the stirrer to dry and stir for 60s, then adding water and stirring for 120s, and finally preparing the self-compacting concrete, wherein the mixing amount is 1.4%, the water-cement ratio is 0.45, and the strength grade can reach C40.
The construction process of the micro pile 9 is as follows: leveling a field, manufacturing a grouting steel pipe, measuring paying-off, positioning hole distance, drilling a drill, installing a grouting machine, installing and lowering the steel pipe, installing a grouting pipe, mixing cement mortar, and performing one-time pressurized grouting until the upper opening is turned, wherein the grouting pressing force is 0.3 MPa.
The construction flow of the fabricated column member 5 is as follows: the method comprises the steps of paying off a pile position, controlling the verticality of the tubular pile by a theodolite, controlling the pile top elevation of the tubular pile by a level gauge, lifting the tubular pile, positioning the tubular pile, assembling an upper part and a lower part, installing and fixing a prestressed anchor bar, welding a joint, hammering a prefabricated tubular pile and installing.
The invention meets the construction requirement of the pile foundation in the deep soft soil foundation of the cold region, the miniature pile is a steel pipe pile which is subjected to grouting, the steel pipe pile is driven in by adopting a drilling rotary pressing mode, then injection grouting is carried out, bearing platform construction is carried out after a pile body has certain bearing capacity, and the top of the steel pipe pile extends into the bearing platform unit and is connected and fixed with the reinforcement cage.
It will be evident to those skilled in the art that the invention is not limited to the details of the foregoing illustrative embodiments, and that the present invention may be embodied in other specific forms without departing from the spirit or essential attributes thereof. The present embodiments are therefore to be considered in all respects as illustrative and not restrictive, the scope of the invention being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein. Any reference sign in a claim should not be construed as limiting the claim concerned.
Furthermore, it should be understood that although the present description refers to embodiments, not every embodiment may contain only a single embodiment, and such description is for clarity only, and those skilled in the art should integrate the description, and the embodiments may be combined as appropriate to form other embodiments understood by those skilled in the art.
Claims (3)
1. The utility model provides a cold district assembled concrete cushion cap and miniature stake combined foundation which characterized in that: comprises a pile unit and a bearing platform unit; the pile unit comprises a bearing platform column (1) and a miniature pile (9); the lower end of the bearing platform column (1) is connected with the bearing platform unit, and the lower end of the bearing platform unit is provided with a plurality of micro piles (9).
2. The cold region fabricated concrete bearing platform and micro-pile combined foundation of claim 1, wherein: the bearing platform column (1) comprises prestressed reinforcements (2), self-compacting concrete (3), anchor bolts (4) and a plurality of assembled column components (5); the assembled column members (5) are arranged in an up-and-down stacking manner, a hollow cavity is arranged in the middle of each assembled column member (5), and self-compacting concrete (3) is poured in the hollow cavity; the lower ends of all the assembled column members (5) except the lowermost end are integrally provided with a clamping block, the upper ends of all the assembled column members (5) except the uppermost end are provided with clamping grooves (6), and every two adjacent assembled column members (5) are connected in a manner that the clamping blocks are inserted into the corresponding clamping grooves (6) in a matching manner; the outer wall of every assembled column component (5) all is equipped with the component reinforcing bar hole, and the component reinforcing bar hole one-to-one of a plurality of assembled column components (5) sets up, the lower extreme of prestressing steel (2) pass behind the component reinforcing bar hole that corresponds with the cushion cap unit connection to the upper end of prestressing steel (2) is passed through crab-bolt (4) and is connected with the up end that is located the assembled column component (5) of top.
3. The cold region fabricated concrete bearing platform and micro-pile combined foundation as claimed in claim 1 or 2, wherein: the bearing platform unit comprises a bearing platform upper cover plate (7), connecting steel bars (8), a steel bar cage (11), an assembly part splicing steel plate (10), a cross connecting seat (14) and a bearing platform bottom plate (15); the lower end of the bearing platform column (1) is fixedly connected with the middle of a bearing platform bottom plate (15), a cross connecting seat (14) is sleeved on the outer side of the lower end of the bearing platform column (1), the lower end of the cross connecting seat (14) is connected with the bearing platform bottom plate (15), an assembly part splicing steel plate (10) is arranged on the outer wall of the bearing platform bottom plate (15), the assembly part splicing steel plate (10) is arranged in a surrounding mode, a steel reinforcement cage (11) is arranged inside the assembly part splicing steel plate (10), the lower end of the steel reinforcement cage (11) is connected with the cross connecting seat (14), and a bearing platform upper cover plate (7) is arranged at the upper end of the steel reinforcement cage (11); the cross-shaped connecting seat (14) penetrates through the cross-shaped connecting seat and is transversely and longitudinally provided with a plurality of connecting seat reinforcing steel bar holes, each connecting steel bar (8) is arranged in each connecting seat reinforcing steel bar hole, and two ends of each connecting steel bar (8) are arranged on the outer sides of the assembly part splicing steel plates (10).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111387577.9A CN114032943A (en) | 2021-11-22 | 2021-11-22 | Cold region fabricated concrete bearing platform and miniature pile combined foundation |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111387577.9A CN114032943A (en) | 2021-11-22 | 2021-11-22 | Cold region fabricated concrete bearing platform and miniature pile combined foundation |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN114032943A true CN114032943A (en) | 2022-02-11 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202111387577.9A Pending CN114032943A (en) | 2021-11-22 | 2021-11-22 | Cold region fabricated concrete bearing platform and miniature pile combined foundation |
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| Country | Link |
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| CN (1) | CN114032943A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116290059A (en) * | 2023-01-04 | 2023-06-23 | 江苏海洋大学 | Prefabricated ultra-high performance concrete spiral pile cap and construction process |
| CN116537244A (en) * | 2023-07-06 | 2023-08-04 | 交通运输部公路科学研究所 | Combined underwater bridge Liang Zhuangji and construction method thereof |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH05331862A (en) * | 1992-05-29 | 1993-12-14 | N K Eng Kk | Steel foundation structure |
| CN202787301U (en) * | 2012-08-28 | 2013-03-13 | 冯计锁 | Pre-stress baffle type assembling prefabricated reinforced concrete tower crane foundation |
| CN208633136U (en) * | 2018-07-13 | 2019-03-22 | 安徽华电工程咨询设计有限公司 | Novel fabricated Screw Anchor composite foundation |
| CN109989414A (en) * | 2019-05-06 | 2019-07-09 | 河南绿建建筑科技有限公司 | Assembling type base |
-
2021
- 2021-11-22 CN CN202111387577.9A patent/CN114032943A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH05331862A (en) * | 1992-05-29 | 1993-12-14 | N K Eng Kk | Steel foundation structure |
| CN202787301U (en) * | 2012-08-28 | 2013-03-13 | 冯计锁 | Pre-stress baffle type assembling prefabricated reinforced concrete tower crane foundation |
| CN208633136U (en) * | 2018-07-13 | 2019-03-22 | 安徽华电工程咨询设计有限公司 | Novel fabricated Screw Anchor composite foundation |
| CN109989414A (en) * | 2019-05-06 | 2019-07-09 | 河南绿建建筑科技有限公司 | Assembling type base |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116290059A (en) * | 2023-01-04 | 2023-06-23 | 江苏海洋大学 | Prefabricated ultra-high performance concrete spiral pile cap and construction process |
| CN116290059B (en) * | 2023-01-04 | 2023-09-08 | 江苏海洋大学 | Prefabricated ultra-high performance concrete spiral pile cap and construction process |
| CN116537244A (en) * | 2023-07-06 | 2023-08-04 | 交通运输部公路科学研究所 | Combined underwater bridge Liang Zhuangji and construction method thereof |
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