CN111636438A - Deep foundation pit supporting structure and deformation control method thereof - Google Patents
Deep foundation pit supporting structure and deformation control method thereof Download PDFInfo
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- CN111636438A CN111636438A CN202010585795.2A CN202010585795A CN111636438A CN 111636438 A CN111636438 A CN 111636438A CN 202010585795 A CN202010585795 A CN 202010585795A CN 111636438 A CN111636438 A CN 111636438A
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D17/00—Excavations; Bordering of excavations; Making embankments
- E02D17/02—Foundation pits
- E02D17/04—Bordering surfacing or stiffening the sides of foundation pits
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D33/00—Testing foundations or foundation structures
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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
- E02D5/74—Means for anchoring structural elements or bulkheads
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Abstract
The invention relates to the technical field of foundation pit supporting, in particular to a deep foundation pit supporting structure and a deformation control method thereof. The deformation control method comprises the steps of establishing a model of a deep foundation pit supporting structure; calculating a deep foundation pit supporting structure model; and according to the calculation result of the deep foundation pit supporting structure model and the grade requirement of the deep foundation pit, the rigidity value of the enclosure crown beam is enhanced by arranging a reinforcing structure at the peripheral side of the deep foundation pit. The deformation control method can effectively control the deformation of the deep foundation pit supporting structure and the ground surface, and is simple, convenient and quick in construction and low in cost.
Description
Technical Field
The application relates to the technical field of foundation pit supporting, in particular to a deep foundation pit supporting structure and a deformation control method thereof.
Background
Along with the development of society, in the engineering construction processes such as municipal administration, railway, highway, building, the implementation that relates to deep foundation ditch engineering in a large number, the design scale of deep foundation ditch is bigger and bigger, and length and degree of depth are constantly climbing. The quality of the design scheme of the deep foundation pit supporting structure often directly influences the rationality and economy of the main structure scheme, and even determines the success or failure of the whole engineering project. Especially for deep foundation pit engineering with the length of hundreds of meters, the width of dozens of meters, the depth of dozens of meters and even dozens of meters, because the length of the deep foundation pit is too long, the rigidity of the top beam of the supporting structure is in inverse proportion to the third power of the length of the deep foundation pit, the rigidity of the top beam of the long and large deep foundation pit is relatively weak, the supporting structure and the adjacent ground surface are inevitably deformed greatly, and the requirements of relevant specifications of the deep foundation pit design are extremely difficult to meet.
Therefore, the deformation problem of the supporting structure is particularly prominent during the construction of the existing deep foundation pit.
Disclosure of Invention
The embodiment of the application provides a deep foundation pit supporting structure and a deformation control method thereof, the deformation of the deep foundation pit supporting structure and the ground surface can be effectively controlled by the deformation control method, and the deep foundation pit supporting structure and the ground surface are simple and convenient to construct and low in cost.
According to a first aspect of embodiments of the present application, there is provided a deformation control method for a deep foundation pit supporting structure, the deformation control method including the steps of:
establishing a model of a deep foundation pit supporting structure; the deep foundation pit supporting structure comprises an enclosure structure, the enclosure structure comprises a plurality of enclosure piles distributed circumferentially around the deep foundation pit and enclosure crown beams formed at the tops of the enclosure piles, and the enclosure crown beams fixedly connect the enclosure piles into a whole;
calculating a deep foundation pit supporting structure model, wherein the calculation result comprises a rigidity value and a deformation value of the deep foundation pit supporting structure;
according to the calculation result of the deep foundation pit supporting structure model and the grade requirement of the deep foundation pit, the rigidity value of the enclosure crown beam is enhanced by arranging a reinforcing structure on the outer peripheral side of the deep foundation pit; the reinforcing structure comprises a plurality of groups of fulcrum piles arranged at intervals along the circumferential direction of the deep foundation pit and reinforcing crown beams corresponding to each group of fulcrum piles one to one; the reinforced crown beam is formed at the top of each group of fulcrum piles, each group of fulcrum piles and the enclosure crown beam are fixedly connected into a whole, and the reinforced crown beam is perpendicular to the enclosure crown beam.
Preferably, in the step of enhancing the rigidity value of the enclosing crown beam by arranging the reinforcing structure on the outer peripheral side of the deep foundation pit, the number of the fulcrum piles in each group of fulcrum piles is set on the basis that the corresponding position of the deep foundation pit meets the rigidity required for forming an independent fulcrum.
Preferably, after the pile foundation construction of the fulcrum pile is completed, a preset number of anchor rods are driven from one side of the deep foundation pit to one side of the pile foundation of the fulcrum pile by combining site conditions and foundation pit calculation results, so that the deformation of the deep foundation pit is better limited.
According to a second aspect of the embodiments of the present application, there is provided a deep foundation pit supporting structure using any one of the deformation control methods in the above technical solutions, where the deep foundation pit supporting structure includes a support structure and a reinforcing structure, where:
the enclosure structure comprises a plurality of enclosure piles distributed circumferentially around the deep foundation pit and an enclosure crown beam formed at the tops of the enclosure piles, and the enclosure crown beam fixedly connects the enclosure piles into a whole;
the reinforcing structure comprises a plurality of groups of fulcrum piles arranged at intervals along the circumferential direction of the deep foundation pit and reinforcing crown beams corresponding to each group of fulcrum piles one to one; the reinforced crown beam is formed at the top of each group of fulcrum piles, each group of fulcrum piles and the enclosure crown beam are fixedly connected into a whole, and the reinforced crown beam is perpendicular to the enclosure crown beam.
Preferably, each set of fulcrum piles comprises at least one fulcrum pile.
Preferably, when each group of fulcrum piles includes at least two fulcrum piles, the arrangement direction of the at least two fulcrum piles is perpendicular to the extending direction of the side edge of the corresponding deep foundation pit.
Preferably, each set of fulcrum piles comprises three fulcrum piles arranged in a straight line.
Preferably, a reinforcing section steel is fixedly connected to the middle upper parts of at least two of the guard piles, an anchor rod is fixedly connected to the reinforcing section steel, and the anchor rod is inserted into the soil body on one side of the fulcrum pile from one side of the guard pile.
Preferably, in each group of fulcrum piles, the net spacing between adjacent fulcrum piles is 0.2m to 0.3 m.
Preferably, the reinforcing crown beam is a concrete beam.
Preferably, the height of the reinforcing crown beam is greater than or equal to 1m, and the width of the reinforcing crown beam is greater than or equal to the width of a pile foundation of the fulcrum pile.
By adopting the deep foundation pit supporting structure and the deformation control method thereof provided by the embodiment of the application, the following beneficial effects are achieved:
according to the deformation control method of the deep foundation pit supporting structure, the model of the deep foundation pit supporting structure is calculated, and the rigidity value of the enclosing crown beam is enhanced by arranging the reinforcing structure on the outer peripheral side of the deep foundation pit according to the calculation result and the grade requirement of the deep foundation pit; because a plurality of fulcrum piles perpendicular to the side edge of the deep foundation pit are constructed in the circumferential direction of the deep foundation pit, the reinforced crown beam is constructed on the top of the newly added fulcrum pile, the reinforced crown beam is connected with the original enclosure structure on the periphery of the foundation pit, and the deformation resistance of the deep foundation pit is improved by improving the rigidity of the crown beam, so that a stable deep foundation pit supporting system is formed. Therefore, the deformation control method does not need to change the conventional deep foundation pit support structure form, has small influence on the engineering cost and the construction period, is simple and convenient to construct and low in cost, and can effectively control the deformation of the deep foundation pit so as to ensure the stability and the safety of the deep foundation pit.
Meanwhile, the deep foundation pit supporting structure formed by the deformation control method has the characteristic of small occupied area, and is more suitable for urban narrow areas compared with the existing double-row pile supporting system.
Drawings
The accompanying drawings, which are included to provide a further understanding of the application and are incorporated in and constitute a part of this application, illustrate embodiment(s) of the application and together with the description serve to explain the application and not to limit the application. In the drawings:
fig. 1 is a schematic view of a deformation control method of a deep foundation pit supporting structure according to an embodiment of the present application;
fig. 2 is a schematic partial plan view of a deep foundation pit supporting structure provided in an embodiment of the present application;
fig. 3 is a schematic elevation view of the building envelope in fig. 2 with additional reinforced steel bars and anchor rods.
Reference numerals:
1-a building enclosure; 2-a reinforcing structure; 11-fender posts; 12-enclosing a crown beam; 13-reinforcing section steel; 14-anchor rod; 21-fulcrum piles; 22-reinforcing the crown beam.
Detailed Description
In order to make the technical solutions and advantages of the embodiments of the present application more apparent, the following further detailed description of the exemplary embodiments of the present application with reference to the accompanying drawings makes it clear that the described embodiments are only a part of the embodiments of the present application, and are not exhaustive of all embodiments. It should be noted that the embodiments and features of the embodiments in the present application may be combined with each other without conflict.
The embodiment of the application provides a deep foundation pit supporting structure and a deformation control method thereof, which are suitable for the engineering design and construction of deep foundation pits of municipal administration, railways, roads, buildings and the like, and are particularly suitable for the construction of deep foundation pits in narrow urban areas. The deformation control method of the deep foundation pit supporting structure can be used in the design of the deep foundation pit and also can be used in the construction process of the deep foundation pit.
Example one
The embodiment of the application provides a deformation control method for a deep foundation pit supporting structure, and as shown in fig. 1, the deformation control method comprises the following steps:
s100, establishing a model of a deep foundation pit supporting structure; as shown in the structure of fig. 2, the deep foundation pit supporting structure comprises a building enclosure 1, the building enclosure 1 comprises a plurality of fender posts 11 distributed circumferentially around the deep foundation pit and a building enclosure crown beam 12 formed at the top of the fender posts 11, and the building enclosure crown beam 12 fixedly connects the fender posts 11 into a whole;
step S200, calculating a deep foundation pit supporting structure model, wherein the calculation result can comprise a rigidity value and a deformation value of the deep foundation pit supporting structure; when the deep foundation pit supporting structure model is calculated, Computer Aided Engineering (CAE) software can be adopted, and other simulation software or manual calculation can also be adopted; in the calculation process, parameters such as stress, deformation and load of the deep foundation pit supporting structure can be calculated;
step S300, according to the calculation result of the deep foundation pit supporting structure model and the grade requirement of the deep foundation pit, the rigidity value of the enclosing crown beam 12 is enhanced by arranging the reinforcing structure 2 on the outer peripheral side of the deep foundation pit; the calculation result in step 200 may include reference values such as a deformation value (deformation amount), a load value, and a displacement value of the deep foundation pit supporting structure; according to the result obtained by calculating the deep foundation pit supporting structure model, the building enclosure 1 is reinforced in a targeted manner; as shown in the structure of fig. 2, the reinforcing structure 2 includes a plurality of groups of fulcrum piles 21 arranged at intervals along the circumferential direction of the deep foundation pit and reinforcing crown beams 22 corresponding to each group of fulcrum piles 21 one to one; the reinforced crown beam 22 is formed on the top of each group of the fulcrum piles 21, each group of the fulcrum piles 21 and the enclosure crown beam 12 are fixedly connected into a whole, and the reinforced crown beam 22 is perpendicular to the enclosure crown beam 12.
According to the deformation control method of the deep foundation pit supporting structure, the model of the deep foundation pit supporting structure is calculated, and the rigidity value of the enclosure crown beam 12 is enhanced by arranging the reinforcing structure 2 on the outer peripheral side of the deep foundation pit according to the calculation result and the grade requirement of the deep foundation pit; because a plurality of fulcrum piles 21 perpendicular to the side edge of the deep foundation pit are constructed in the circumferential direction of the deep foundation pit, a reinforced crown beam 22 is constructed at the top of the newly added fulcrum pile 21, the reinforced crown beam 22 is connected with the original enclosure structure 1 at the periphery of the foundation pit, the deformation resistance of the deep foundation pit is improved by improving the rigidity of the crown beam, and a stable deep foundation pit supporting system is formed. Therefore, the deformation control method does not need to change the conventional form of the deep foundation pit enclosure structure 1, has small influence on the construction cost and the construction period, is simple and convenient to construct and low in cost, and can effectively control the deformation of the deep foundation pit so as to ensure the stability and the safety of the deep foundation pit.
Meanwhile, the deep foundation pit supporting structure formed by the deformation control method has the characteristic of small occupied area, and is more suitable for urban narrow areas compared with the existing double-row pile supporting system.
In a specific embodiment, in the step S300 of enhancing the rigidity value of the enclosing crown beam 12 by arranging the reinforcing structure 2 on the outer peripheral side of the deep foundation pit, the number of the fulcrum piles 21 in each group of the fulcrum piles 21 is set on the basis that the corresponding position of the deep foundation pit meets the rigidity required for forming an independent fulcrum; in the structures shown in fig. 2 and 3, each group of fulcrum piles 21 is composed of 3 fulcrum piles 21 arranged in a straight line at intervals, in the actual design and construction process, comprehensive judgment can be performed according to the actual calculation result and the construction ground condition, each group of fulcrum piles 21 may only include 1 fulcrum pile 21, may include 2 fulcrum piles 21, may also include 3 fulcrum piles 21 as shown in the structure in fig. 2, and may further include 4 or more fulcrum piles 21, and the purpose of setting the fulcrum piles 21 is to make the rigidity of the enclosure structure 1 of the deep foundation pit at the position where each group of fulcrum piles 21 is set meet the construction requirements.
When the fulcrum pile 21 of the reinforcing structure 2 is constructed, the pile foundation of the fulcrum pile 21 can be constructed by adopting a hole digging process or a drilling process, after the construction of the fulcrum pile 21 is finished, a preset number of anchor rods 14 can be driven from one side of a deep foundation pit to one side of the pile foundation of the fulcrum pile 21, and form a combined structure with reinforcing section steel 13 arranged at the middle upper part of the enclosure pile 11, as shown in the structure of fig. 3, in order to enable the anchor rods 14 to play a supporting and reinforcing role on the enclosure pile 11, reinforcing section steel 13 is further arranged at one side of the enclosure pile 11, which is far away from the fulcrum pile 21, one end of each anchor rod 14 is fixed on the reinforcing section steel 13, the reinforcing section steel 13 is used as a fulcrum, and the other end of each anchor rod 14 is; by providing the anchor rods 14 and the reinforcement shaped steel 13, the pile foundation of the fender pile 11 can be further structurally reinforced.
Example two
The embodiment of the application also provides a deep foundation pit supporting structure formed by construction by adopting the deformation control method, as shown in the structures of fig. 2 and 3, the deep foundation pit supporting structure comprises a support structure 1 and a reinforcing structure 2, wherein:
the enclosure structure 1 comprises a plurality of enclosure piles 11 distributed circumferentially around the deep foundation pit and enclosure crown beams 12 formed at the tops of the enclosure piles 11, and the enclosure crown beams 12 fixedly connect the enclosure piles 11 into a whole; the enclosing crown beam 12 and the enclosing pile 11 are of a construction site pouring structure; a plurality of fender posts 11 can be uniformly distributed along the circumferential direction of the deep foundation pit;
the reinforcing structure 2 comprises a plurality of groups of fulcrum piles 21 arranged at intervals along the circumferential direction of the deep foundation pit and reinforcing crown beams 22 corresponding to each group of fulcrum piles 21 one by one; the reinforced crown beam 22 is formed on the top of each group of the fulcrum piles 21, each group of the fulcrum piles 21 and the enclosure crown beam 12 are fixedly connected into a whole, and the reinforced crown beam 22 is perpendicular to the enclosure crown beam 12. When the deep foundation pit is a rectangular pit, the reinforcing structure 2 is arranged around the deep foundation pit; constructing a plurality of groups of pile foundations at intervals of certain length and perpendicular to the side edge of the deep foundation pit along the circumferential direction of the deep foundation pit to form locally independent fulcrum piles 21; each group of fulcrum piles 21 includes at least one fulcrum pile 21, each group of fulcrum piles 21 may include 1, 2, 3 or more fulcrum piles, as in the deep foundation pit supporting structure shown in fig. 2, each group of fulcrum piles 21 includes 3 collinear fulcrum piles 21, and in the embodiment of the present application, the example in which 3 fulcrum piles are provided in each group is described; when each group of fulcrum piles 21 comprises at least two fulcrum piles 21, the at least two fulcrum piles 21 are arranged along the same straight line perpendicular to the side edge of the deep foundation pit, that is, the fulcrum piles 21 in each group of fulcrum piles 21 are distributed collinearly; as shown in the structure of fig. 2, each pile body in each group of fulcrum piles 21 is located on the same straight line, and the arrangement direction of each pile body in each group of fulcrum piles 21 is perpendicular to the side corresponding to the deep foundation pit. In each group of the fulcrum piles 21, the net spacing between adjacent fulcrum piles 21 may be 0.2m to 0.3m, such as: 0.2m, 0.25m, 0.3m, and the clear pitch refers to a distance between the outer peripheral surfaces of two adjacent fulcrum piles 21.
As shown in the structure of fig. 3, in order to further improve the structural strength and rigidity of the fender pile 11, a predetermined number of anchor rods 14 may be driven between the fender piles 11 from the deep foundation pit side to the pile foundation side of the fulcrum pile 21, so as to support and reinforce the fender pile 11 through the anchor rods 14, and meanwhile, in order to ensure the reinforcing effect of the anchor rods 14 on the fender pile 11, a reinforcing section steel 13 may be further disposed at the middle upper portion of the fender pile 11, the reinforcing section steel 13 is disposed at the side of the fender pile 11 away from the fulcrum pile 21 and serves as the fixed end of the anchor rods 14, the reinforcing section steel 13 and the anchor rods 14 form a combined reinforcing structure, and the anchor rods 14 support the fender pile 11 through the reinforcing section steel 13.
In the deep foundation pit supporting structure, the reinforced crown beam 22 may be a concrete beam or a steel beam, and when the reinforced crown beam 22 is a concrete beam, the height of the reinforced crown beam 22 is greater than or equal to 1m, and the width of the reinforced crown beam is greater than or equal to the pile foundation width of the fulcrum pile 21.
When the deep foundation pit is constructed, the deep foundation pit supporting structure not only comprises the enclosure structure 1 arranged around the deep foundation pit, but also comprises the reinforcing structure 2 used for reinforcing the rigidity of the enclosure structure 1, the reinforcing structure 2 is arranged in the circumferential direction of the deep foundation pit at intervals, and the deep foundation pit supporting structure is simple in design structure and convenient and fast to construct. The fulcrum piles 21 of the reinforcing structure 2 are fixedly connected into a whole by the reinforcing crown beams 22, the reinforcing crown beams 22 are perpendicular to the enclosure crown beams 12 and are fixedly connected into a whole, a stable foundation pit supporting system is formed, therefore, the enclosure structure 1 is supported through the reinforcing structure 2 so as to improve the rigidity and the strength of the enclosure crown beams 12, and deformation of the deep foundation pit supporting structure and the ground surface can be effectively controlled.
When the deep foundation pit is constructed by adopting the deep foundation pit supporting structure and the deformation control method thereof, the deep foundation pit excavation construction is carried out after the deep foundation pit supporting structure and the fulcrum pile 21 are constructed, and the deep foundation pit excavation must be carried out after the pile foundation and the pile top crown beam reach the design strength. And the soil between the supporting piles is subjected to net spraying protection along with the excavation of the deep foundation pit. The earth excavation sequence of the deep foundation pit is consistent with the design working condition and follows the space-time effect principle, namely the principles of layered and segmented excavation, firstly supporting and then excavating and strictly prohibiting over excavation. During construction, the earthwork of the working pit can not be piled up beside the pit, and the earthwork must be abandoned far away. In order to implement dynamic control on the construction process, grasp the states of the stratum and the enclosure structure 1 system and influence of construction on existing surrounding buildings (structures), monitoring of a deep foundation pit supporting structure and the surrounding environment is required, and a monitoring and early warning system and an emergency plan are established; the monitoring objects of the deep foundation pit supporting structure comprise fender posts 11, fulcrum posts 21, anchor rods 14 and the like, and the surrounding environment monitoring objects are earth surface soil bodies around the engineering, existing buildings, underground pipelines and other municipal infrastructure.
While the preferred embodiments of the present application have been described, additional variations and modifications in those embodiments may occur to those skilled in the art once they learn of the basic inventive concepts. Therefore, it is intended that the appended claims be interpreted as including preferred embodiments and all alterations and modifications as fall within the scope of the application.
It will be apparent to those skilled in the art that various changes and modifications may be made in the present application without departing from the spirit and scope of the application. Thus, if such modifications and variations of the present application fall within the scope of the claims of the present application and their equivalents, the present application is intended to include such modifications and variations as well.
Claims (11)
1. A deformation control method for a deep foundation pit supporting structure is characterized by comprising the following steps:
establishing a model of a deep foundation pit supporting structure; the deep foundation pit supporting structure comprises an enclosure structure, the enclosure structure comprises a plurality of enclosure piles distributed circumferentially around the deep foundation pit and enclosure crown beams formed at the tops of the enclosure piles, and the enclosure crown beams fixedly connect the enclosure piles into a whole;
calculating a deep foundation pit supporting structure model, wherein the calculation result comprises a rigidity value and a deformation value of the deep foundation pit supporting structure;
according to the calculation result of the deep foundation pit supporting structure model and the grade requirement of the deep foundation pit, the rigidity value of the enclosure crown beam is enhanced by arranging a reinforcing structure on the outer peripheral side of the deep foundation pit; the reinforcing structure comprises a plurality of groups of fulcrum piles arranged at intervals along the circumferential direction of the deep foundation pit and reinforcing crown beams corresponding to each group of fulcrum piles one to one; the reinforced crown beam is formed at the top of each group of fulcrum piles, each group of fulcrum piles and the enclosure crown beam are fixedly connected into a whole, and the reinforced crown beam is perpendicular to the enclosure crown beam.
2. The deformation control method according to claim 1, wherein in the step of enhancing the rigidity value of the enclosing crown beam by providing the reinforcing structure on the outer peripheral side of the deep foundation pit, the number of the fulcrum piles in each group of the fulcrum piles is set on the basis that the corresponding position of the deep foundation pit satisfies the rigidity required for forming the independent fulcrum.
3. The deformation control method according to claim 2, wherein after the pile foundation construction of the fulcrum pile is completed, a predetermined number of anchor rods are driven from the side of the deep foundation pit to the side of the pile foundation of the fulcrum pile.
4. A deep foundation pit supporting structure using the deformation control method according to any one of claims 1 to 3, comprising a building envelope and a reinforcing structure, wherein:
the enclosure structure comprises a plurality of enclosure piles distributed circumferentially around the deep foundation pit and an enclosure crown beam formed at the tops of the enclosure piles, and the enclosure crown beam fixedly connects the enclosure piles into a whole;
the reinforcing structure comprises a plurality of groups of fulcrum piles arranged at intervals along the circumferential direction of the deep foundation pit and reinforcing crown beams corresponding to each group of fulcrum piles one to one; the reinforced crown beam is formed at the top of each group of fulcrum piles, each group of fulcrum piles and the enclosure crown beam are fixedly connected into a whole, and the reinforced crown beam is perpendicular to the enclosure crown beam.
5. The deep foundation pit supporting structure of claim 4, wherein each set of fulcrum piles includes at least one fulcrum pile.
6. The deep foundation pit supporting structure according to claim 5, wherein when each set of the fulcrum piles includes at least two fulcrum piles, an arrangement direction of the at least two fulcrum piles is perpendicular to an extending direction of the side of the corresponding deep foundation pit.
7. The deep foundation pit supporting structure of claim 6, wherein each set of the fulcrum piles includes three fulcrum piles arranged in a straight line.
8. The deep foundation pit supporting structure of claim 7, wherein in each group of the fulcrum piles, a net spacing between adjacent fulcrum piles is 0.2m to 0.3 m.
9. The deep foundation pit supporting structure according to claim 4, wherein a reinforcing section steel is fixedly connected to an upper middle portion of at least two of the fender piles, an anchor rod is fixedly connected to the reinforcing section steel, and the anchor rod is inserted into the soil on the side of the fulcrum pile from the side of the fender pile.
10. A deep foundation pit supporting construction according to any one of claims 4 to 9, wherein the reinforcing crown beam is a concrete beam.
11. The deep foundation pit supporting structure of claim 10, wherein the reinforcing crown beam has a height of 1m or more and a width of 1m or more and a pile foundation width of the fulcrum pile.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN202010585795.2A CN111636438A (en) | 2020-06-24 | 2020-06-24 | Deep foundation pit supporting structure and deformation control method thereof |
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| CN202010585795.2A CN111636438A (en) | 2020-06-24 | 2020-06-24 | Deep foundation pit supporting structure and deformation control method thereof |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113235613A (en) * | 2021-05-24 | 2021-08-10 | 中国铁路设计集团有限公司 | Newly-built foundation pit excavation supporting method using adjacent existing fender post |
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2020
- 2020-06-24 CN CN202010585795.2A patent/CN111636438A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113235613A (en) * | 2021-05-24 | 2021-08-10 | 中国铁路设计集团有限公司 | Newly-built foundation pit excavation supporting method using adjacent existing fender post |
| CN113235613B (en) * | 2021-05-24 | 2024-04-05 | 中国铁路设计集团有限公司 | Method for excavating and supporting newly-built foundation pit by utilizing adjacent existing guard piles |
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