CN215829432U - Variable-rigidity pile enclosure structure - Google Patents
Variable-rigidity pile enclosure structure Download PDFInfo
- Publication number
- CN215829432U CN215829432U CN202121700789.3U CN202121700789U CN215829432U CN 215829432 U CN215829432 U CN 215829432U CN 202121700789 U CN202121700789 U CN 202121700789U CN 215829432 U CN215829432 U CN 215829432U
- Authority
- CN
- China
- Prior art keywords
- rigidity
- variable
- long
- piles
- short
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
Links
Images
Landscapes
- Piles And Underground Anchors (AREA)
- Foundations (AREA)
Abstract
The variable-rigidity pile enclosure structure is composed of a crown beam (1) and row piles (2), the row piles are variable-rigidity cast-in-situ bored piles, and the rigidity of a pile body is determined by a special reinforced steel cage (3). The reinforcement cage (3) is composed of long reinforcements, short reinforcements and stirrups, the length of the long reinforcements is obtained by relevant standard design, and the length of the short reinforcements is larger than the depth of the foundation pit and smaller than the length of the long reinforcements. The rigidity of the variable-rigidity pile can be divided into three types according to the number ratio of the long ribs to the short ribs, and the number ratio is 1:1, 1:2 and 1:3 respectively. The enclosure structure formed by arranging and combining the single type of variable stiffness piles or the multiple types of variable stiffness piles can be flexibly selected according to geological conditions, the safety and stability of the foundation pit are guaranteed, meanwhile, the rigidity of the pile body is utilized to the maximum extent, engineering materials are saved, the cost is reduced, and the economic benefit is increased.
Description
Technical Field
The utility model relates to a variable-rigidity pile enclosure structure, and belongs to the technical field of foundation pit enclosure structure engineering.
Background
With the rapid development of the infrastructure of China, the underground space is developed and utilized more and more widely, and the requirements on the corresponding foundation pit engineering are higher and higher. The building envelope is used as an important link of foundation pit engineering, so that not only is the overall stability and safety of the foundation pit ensured, but also some innovative progress is made in the aspect of avoiding waste of manpower and material resources caused by excessive conservative design in recent years.
The row pile is a common foundation pit support structure, the stability of the foundation pit is generally ensured by controlling the length of the pile, but the bending moment of a pile body is reduced along with the increase of the depth of the pile body embedded into the bottom of the foundation pit, namely, the lower part of the pile is in an overhigh strength state, so that waste is caused. Therefore, the long and short piles are used as a novel enclosure structure in some foundation pit projects. However, the design and construction requirements of the long and short piles are not clearly given in the existing specifications, and the length of the short pile is mostly determined through a model test before the long and short pile enclosure structure is constructed, so that the construction difficulty is increased.
Disclosure of Invention
The utility model aims to provide a variable-rigidity pile enclosure structure to meet the design requirements of a foundation pit, aiming at the problems of pile arrangement of the existing foundation pit enclosure structure.
The technical scheme of the utility model is that the variable-rigidity pile enclosure structure comprises a crown beam and row piles, wherein the row piles are variable-rigidity cast-in-situ bored piles, and the rigidity of a pile body is determined by a special reinforcement cage; the reinforcement cage is formed by combining long reinforcements and short reinforcements; the row piles of the enclosure structure are formed by arranging and combining single type variable-rigidity piles or multiple types of variable-rigidity piles.
The length relation of the long ribs and the short ribs of the variable-rigidity pile is as follows:L1=0.4L2+H(ii) a Wherein the content of the first and second substances,Hfor the depth of foundation pitDegree;L1 is the length of the short rib, L 1+Land 2 is the length of the long rib.
The long ribs and the short ribs of the reinforcement cage are combined reinforcing bars which are longitudinal reinforcing bars, and at least one short rib is arranged between every two adjacent long ribs.
The number ratio of the long ribs to the short ribs comprises 1:1, 1:2 and 1: 3. The combination mode is as follows: one long rib is matched with one short rib, one long rib is matched with two short ribs, and one long rib is matched with three short ribs.
The rigidity of the enclosure structure formed by the variable-rigidity reinforced concrete piles is determined by the reinforcement arrangement mode of the reinforcement cage.
The utility model provides a variable rigidity stake envelope changes pile body rigidity through long and short muscle combination arrangement of reinforcement, reaches saving engineering material, reduce cost's purpose. The variable-rigidity pile enclosure structure provided by the utility model can be designed according to relevant specifications, is convenient to operate, can flexibly use different types of variable-rigidity piles for combination according to geological conditions, and utilizes the rigidity of a pile body to the maximum extent and saves materials. The utility model discloses can design each item physical parameter of envelope stake according to current standard, if stake length, arrangement of reinforcement (indulge the length and the radical etc. of muscle), save engineering material, reduce cost under the circumstances of the stable safety of assurance foundation ditch.
Drawings
FIG. 1 is a cross-sectional view of a variable stiffness pile envelope of the present invention;
FIG. 2 is a schematic diagram of pile reinforcement of the variable-stiffness pile enclosure structure of the utility model;
FIG. 3 is a top view of a section of a pile body of the present invention with a long rib and a short rib;
FIG. 4 is a top view of a section of a pile body of the present invention with one long rib and two short ribs;
FIG. 5 is a top view of the cross section of a pile body of the present invention with one long rib and three short ribs;
in the figure, 1 is a crown beam; 2, piling; a reinforcement cage is 3; 3-1 is a long rib; 3-2 is a short rib; 3-3 are stirrups.
Detailed Description
The specific embodiment of the variable-rigidity pile enclosure structure is shown in the attached drawings.
As shown in fig. 1, the present embodiment is a variable stiffness pile enclosure, which includes a crown beam 1 and a row pile 2. The crown beam 1 is formed by pouring concrete and is positioned at the top of the row piles 2; the row pile 2 is composed of cast-in-situ bored piles, and the rigidity of the pile body is determined by the specially-reinforced reinforcement cage 3.
As shown in figure 2, the reinforcement cage 3 is composed of long reinforcements 3-1, short reinforcements 3-2 and stirrups 3-3. The length design of the long ribs 3-1 is in accordance with relevant specifications, and the requirement of the stability of the foundation pit is met; the length of the short ribs 3-2 is larger than the depth of the foundation pit and smaller than the length of the long ribs, so that the bending moment stress of the pile body is met.
In this embodiment, the depth of the foundation pit is H, and the concrete construction process of the variable stiffness pile enclosure structure is as follows:
(1) leveling a field, measuring and placing a pile position, and embedding a pile casing;
(2) the pile machine is in place to drill a hole;
(3) mixing wall protection slurry and forming holes;
(4) manufacturing a reinforcement cage;
(5) cleaning holes and placing a guide pipe;
(6) hoisting a reinforcement cage, pouring concrete and forming a pile;
the reinforcement cage manufactured in the above process (4) is shown in fig. 2, and has a depth ofHThe design pile length of the foundation pit is as followsLWherein the short ribs have a length ofL1, the length of the long rib isL1+L2, andL1=0.4L2+H。
the pile body takes 1-1 and 2-2 sections, and a specific combination mode of long ribs and short ribs can be obtained. Wherein, the section 1 is a strong rigidity section, and the section 2 is a weak rigidity section.
As shown in fig. 3, the cross section 1 has 16 longitudinal ribs in common, the cross section 2 has 8 longitudinal ribs in common, and the long ribs: short rib = 1:1, called type I rigid piles;
as shown in fig. 4, the cross section 1 has 15 longitudinal ribs in common, the cross section 2 has 5 longitudinal ribs in common, and the long ribs: short rib = 1:2, called type II stiffness piles;
as shown in fig. 5, the cross section 1 has 16 longitudinal ribs in common, the cross section 2 has 4 longitudinal ribs in common, and the long ribs: short rib = 1:3, called type III stiffness piles.
The pile forming in the above process (6) may be performed by using single type (I type, II type, and III type) variable stiffness piles to form a space enclosing structure, or may be performed by arranging and combining multiple types of variable stiffness piles to form a space enclosing structure.
In summary, the variable-rigidity pile enclosure structure provided by the embodiment changes the rigidity of the pile body by combining the long and short reinforcements and reinforcing the long and short reinforcements, so that the purposes of saving engineering materials and reducing cost are achieved. The variable-stiffness pile enclosure structure provided by the embodiment can be designed according to relevant specifications, is convenient to operate, can flexibly take variable-stiffness piles of different types according to geological conditions to combine, and utilizes pile body rigidity and materials to the maximum extent.
Claims (3)
1. A variable-rigidity pile enclosure structure comprises a crown beam and row piles, and is characterized in that the row piles are variable-rigidity cast-in-situ bored piles, and the rigidity of a pile body is determined by a reinforcement cage; the reinforcement cage is formed by combining long reinforcement short reinforcements and stirrups for reinforcement; the row piles of the enclosure structure are formed by arranging and combining single type variable-rigidity piles or multiple types of variable-rigidity piles;
the length relation of the long ribs and the short ribs of the variable-rigidity pile is as follows:L1=0.4L2+H(ii) a Wherein the content of the first and second substances,Hthe depth of the foundation pit;L1 is the length of the short rib,L1+Land 2 is the length of the long rib.
2. A variable stiffness pile enclosure structure according to claim 1, wherein the long reinforcement and the short reinforcement of the reinforcement cage are both longitudinal reinforcements, and at least one short reinforcement is arranged between two adjacent long reinforcements.
3. A variable stiffness pile enclosure structure according to claim 1, wherein the number ratio of the long and short reinforcement combined reinforcement comprises 1:1, 1:2 and 1: 3.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121700789.3U CN215829432U (en) | 2021-07-26 | 2021-07-26 | Variable-rigidity pile enclosure structure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121700789.3U CN215829432U (en) | 2021-07-26 | 2021-07-26 | Variable-rigidity pile enclosure structure |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN215829432U true CN215829432U (en) | 2022-02-15 |
Family
ID=80192718
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202121700789.3U Expired - Fee Related CN215829432U (en) | 2021-07-26 | 2021-07-26 | Variable-rigidity pile enclosure structure |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN215829432U (en) |
-
2021
- 2021-07-26 CN CN202121700789.3U patent/CN215829432U/en not_active Expired - Fee Related
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN101078216B (en) | Method for embedding cement mixing soil curtain into prefabricated reinforced concrete anti-lateral-force pile | |
| CN108999204B (en) | Skirt type diaphragm-added underground diaphragm wall-pile composite foundation | |
| CN204690805U (en) | A kind of shield tunnel continuous beam type float Structure | |
| CN215829432U (en) | Variable-rigidity pile enclosure structure | |
| CN106193101B (en) | Tower crane steel platform pile foundation and its construction method | |
| CN104895122A (en) | Continuous beam type anti-floating structure of shield tunnel | |
| CN101666086B (en) | Cement cast-in-situ pile of prefabricated part and construction method thereof | |
| CN204825925U (en) | Centrifugation side's stake envelope with chase mortise | |
| CN201531021U (en) | Prefabricated member cement-treated-soil drilling and filling pile | |
| CN217325391U (en) | Construction tool for high-speed rail line deep foundation pit secant pile | |
| CN214530638U (en) | Multi-shaft stirring stiffness composite pile | |
| CN213625676U (en) | Combined anti-scour beach fan foundation | |
| CN111894036B (en) | Construction method for additionally arranging basement on strip-shaped foundation building | |
| CN210439151U (en) | Steel box girder supporting system and bridge | |
| CN210482285U (en) | Soft soil foundation manual hole digging pile structure | |
| CN208219667U (en) | Foundation pit supporting construction based on campshed and inner support | |
| CN208088311U (en) | Back-pressure de-bowed type pile slab supporting structure after stake | |
| CN105200984A (en) | Novel ocean engineering pile foundation capable of reducing pile body deflection and manufacturing method thereof | |
| CN206591515U (en) | 8-shaped stake with the edge of a wing | |
| CN206070554U (en) | Tower crane steel platform pile foundation | |
| CN212270914U (en) | Supporting structure of wall protection template of non-circular artificial bored pile with super-large section | |
| CN214940189U (en) | Large-span foundation pit inner supporting structure | |
| CN220117267U (en) | Photovoltaic support rock stock basis and connection structure thereof | |
| CN115369889B (en) | Assembled reinforced concrete foundation pit supporting structure based on wet connection and construction method | |
| CN210177516U (en) | No waist rail pi shape precast pile anchor supporting construction |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20220215 |