CN215759048U - Supporting system with safety device for actively controlling foundation pit displacement - Google Patents
Supporting system with safety device for actively controlling foundation pit displacement Download PDFInfo
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- CN215759048U CN215759048U CN202121812914.XU CN202121812914U CN215759048U CN 215759048 U CN215759048 U CN 215759048U CN 202121812914 U CN202121812914 U CN 202121812914U CN 215759048 U CN215759048 U CN 215759048U
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- safety device
- foundation pit
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- 238000006073 displacement reaction Methods 0.000 title claims abstract description 25
- 229910000831 Steel Inorganic materials 0.000 claims description 13
- 239000010959 steel Substances 0.000 claims description 13
- 238000010276 construction Methods 0.000 claims description 7
- 239000004567 concrete Substances 0.000 claims description 6
- 239000000463 material Substances 0.000 claims description 6
- 238000009412 basement excavation Methods 0.000 claims description 3
- 238000003466 welding Methods 0.000 claims description 3
- 239000011440 grout Substances 0.000 claims 1
- 230000000694 effects Effects 0.000 abstract description 2
- 238000000034 method Methods 0.000 description 4
- 230000000712 assembly Effects 0.000 description 3
- 238000000429 assembly Methods 0.000 description 3
- 238000012986 modification Methods 0.000 description 3
- 230000004048 modification Effects 0.000 description 3
- 230000002457 bidirectional effect Effects 0.000 description 2
- 238000010008 shearing Methods 0.000 description 2
- 239000002689 soil Substances 0.000 description 2
- 238000004873 anchoring Methods 0.000 description 1
- 239000011150 reinforced concrete Substances 0.000 description 1
- 230000003014 reinforcing effect Effects 0.000 description 1
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Abstract
The utility model provides a supporting system with a safety device for actively controlling the displacement of a foundation pit, which comprises an in-pit supporting structure, a building enclosure and a force application device; the safety device is arranged between the pit inner supporting structure and the enclosure structure, the stress application device is used for loading prestress, the safety device is composed of a plurality of groups of inner tenons connected with the inner ring beam and outer tenons connected with the outer ring beam, the inner tenons and the outer tenons are matched with each other to improve the stability between the pit inner supporting structure and the enclosure structure in the vertical prestress direction, and the inner tenons and the outer tenons can move relatively in the prestress direction when the prestress is loaded. The supporting system with the safety device provided by the utility model can repeatedly apply axial force for multiple times to control displacement, has simple safety measure structure and obvious effect, can avoid the risk caused by instability of the force applying device due to lateral force, and greatly improves the safety of the existing supporting system for actively controlling and controlling the displacement of the foundation pit.
Description
Technical Field
The utility model relates to the field of foundation pit construction, in particular to a supporting system with a safety device and capable of actively controlling foundation pit displacement.
Background
The servo type prestressed support is used as a deformation control means commonly used in foundation pit engineering, and has good application in the foundation pit engineering with higher requirements on deformation at present. The prior patent publication CN208105276U, entitled "a supporting system for actively controlling foundation pit displacement", discloses a supporting system for actively controlling foundation pit displacement, in which a force applying device is provided on a concrete supporting system.
Because the foundation pit engineering is generally a closed quadrangle, the supporting system forms a balance by the soil pressure from the periphery, if the support moves horizontally along a certain direction due to the unbalanced soil pressure of the four sides, the force applying device perpendicular to the moving direction is easy to be damaged by instability due to thrust, and once the certain force applying device is damaged by instability, the linkage damage is certainly caused, and further greater risk is caused. It is important for the support system with the force means how to control the deformation perpendicular to the direction of the force means.
SUMMERY OF THE UTILITY MODEL
In view of the above problems, the present invention is directed to a supporting system with a safety device for actively controlling the displacement of a foundation pit. Compared with the existing supporting system for actively controlling and controlling the displacement of the foundation pit, the instability risk generated by the force application device can be greatly reduced. In order to achieve the purpose, the specific scheme is as follows:
a supporting system with a safety device for actively controlling the displacement of a foundation pit comprises an in-pit supporting structure, a building enclosure and a force application device, wherein the force application device is used for loading prestress to the in-pit supporting structure and the building enclosure and consists of a plurality of force application devices arranged between the in-pit supporting structure and the building enclosure,
the pit supporting structure is characterized in that a safety device consisting of a plurality of mortise and tenon components is arranged between the pit supporting structure and the enclosure structure, a force application device is arranged between every two adjacent mortise and tenon components, each mortise and tenon component consists of an inner tenon connected with the pit supporting structure and an outer tenon connected with the enclosure structure, the inner tenon and the outer tenons are mutually matched to improve the stability between the pit supporting structure and the enclosure structure in the vertical prestress direction, and the inner tenons and the outer tenons can relatively move in the prestress direction when the force application device loads prestress.
Further, an inner ring beam and an outer ring beam are respectively arranged on the opposite sides of the pit inner support structure and the enclosure structure.
Further, the inner tenon and the outer tenon are perpendicular to the pit inner support structure and the enclosure structure respectively.
Furthermore, the inner tenon is provided with a notch for inserting the outer tenon, the outer tenon is integrally inserted into the notch or partially inserted into the notch, and the outer tenon inserted into the notch and the inner tenon are relatively fixed in the direction perpendicular to the prestress direction.
Furthermore, the inner tenon and the outer tenon are arranged in a 1:1 staggered mode, a 1:2 wrapped mode or a 2:1 wrapped mode, so that the inner tenon and the outer tenon are guaranteed to be fixed relatively in the vertical prestress direction.
Furthermore, the inner tenon and the outer tenon are of a concrete structure internally provided with shear-resistant steel bars, and the shear-resistant steel bars are respectively anchored into the inner ring beam or the enclosure structure; or
The inner tenon and the outer tenon are steel structures, and the steel structures are respectively embedded into the inner ring beam or the enclosure structure.
Furthermore, after the prestressing force is loaded by the stressing device, the matched inner tenon and the matched outer tenon are fixedly connected in a welding, grouting or mechanical connection mode.
Furthermore, a construction joint of 10 mm-100 mm is reserved between the inner tenon and the outer tenon which are matched, and the construction joint is sealed and filled by grouting material after the prestressing force is loaded by the stressing device.
The utility model bears the shearing force from the direction vertical to the stretching direction of the force-applying device by arranging the shearing resisting measure in the vertical direction, thereby reducing the instability risk caused by the force-applying device; the utility model can repeatedly apply axial force for controlling displacement for many times, has simple safety measure structure and obvious effect, can avoid the risk caused by instability of the force applying device and greatly improves the safety of the existing supporting system for actively controlling and controlling the displacement of the foundation pit.
Drawings
In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings needed to be used in the embodiments or the prior art descriptions will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings based on these drawings without inventive exercise.
FIG. 1 is a side cross-sectional view of a top view of an actively controlled pit displacement support system with a safety feature according to the present invention;
FIG. 2 is a top view of an embodiment of a foundation pit displacement active control support system with a safety device of the present invention, wherein the inner and outer tenons are in a convex-concave fit;
FIG. 3 is a schematic illustration of the structure joint of FIG. 2 after grouting;
FIG. 4 is an enlarged view of a portion of A-1 of FIG. 2 (before grouting the structural joint between the inner and outer tenons);
FIG. 5 is an enlarged view of a portion of A-2 of FIG. 3 (after construction joint grouting);
FIG. 6 is a top view of another embodiment of the present invention showing a support system for actively controlling pit displacement with a safety device, wherein the inner and outer tenons are in a male-female engagement;
FIG. 7 is a schematic illustration of the structure joint of FIG. 6 after grouting;
FIG. 8 is an enlarged view of a portion of B-1 of FIG. 6 (before grouting the structural joint between the inner and outer tenons);
FIG. 9 is an enlarged view of a portion of B-2 of FIG. 7 (after construction joint grouting).
Detailed Description
In the following description, numerous specific details are set forth in order to provide a more thorough understanding of the present invention. It will be apparent, however, to one skilled in the art, that the present invention may be practiced without one or more of these specific details. In other instances, well-known features have not been described in order to avoid obscuring the utility model.
In the following description, for the purposes of explanation, numerous specific details are set forth in order to provide a thorough understanding of the present invention. The following detailed description of the preferred embodiments of the utility model, however, the utility model is capable of other embodiments in addition to those detailed.
Referring to fig. 1, the utility model provides a supporting system with a safety device for actively controlling foundation pit displacement, which comprises an in-pit supporting structure 10, a building enclosure 20 and a force application device 30; the inner ring beam 11 and the outer ring beam 21 are respectively arranged on one side close to the pit inner support structure 10 and the enclosure structure 20, the force applying device 30 is composed of a plurality of force applying devices 31 arranged between the inner ring beam 21 and the outer ring beam 21, the force applying devices 31 can dynamically load prestress in a servo mode according to the deformation, and the loading prestress direction is perpendicular to the inner ring beam and the outer ring beam.
A safety device consisting of a plurality of mortise and tenon components 40 is arranged between the inner ring beam 11 and the outer ring beam 31, and each mortise and tenon component 40 consists of an inner tenon 41 connected with the inner ring beam 11 and an outer tenon 42 connected with the outer ring beam 21. Wherein the inner tenon 41 and the outer tenon 42 are mutually matched to improve the stability between the support structure 10 and the enclosure structure 20 in the vertical prestressing direction, and the reinforcing device 30 can relatively move the inner tenon 41 and the outer tenon 42 in the prestressing direction when being loaded with prestressing force.
In an embodiment, a force applying device 31 is disposed between two adjacent mortise and tenon assemblies 40, or a plurality of force applying devices 31 are disposed between two adjacent mortise and tenon assemblies 40.
In an alternative embodiment, an inner support 12 is provided on the inner ring beam 11 near the inner side of the foundation pit. Wherein, the inner ring beam 11 and the inner support 12 both adopt reinforced concrete support systems to ensure the strength of the support structure 10 in the pit.
In an alternative embodiment, the building enclosure 20 further comprises retaining structures such as diaphragm walls, piles and the like, and as can be seen in fig. 2, at least one row is arranged on the outer ring beam 21 near the outer side of the foundation pit
The cast-in-place pile retaining structure 22.
Preferably, the force means 31 is a jack or a servo jack.
The mortise and tenon joint assembly 40 is constructed in a form including, but not limited to, a steel structure and a concrete structure, and can prevent the support structure 10 and the building envelope 20 from moving perpendicular to the pre-stress direction, and the structure of the mortise and tenon joint assembly 40 is described below by referring to two exemplary embodiments:
1) the inner tenon 41 and the outer tenon 42 are concrete structures internally provided with shear-resistant steel bars, which are anchored in the inner ring beam 11 or the envelope structure 20/the outer ring beam 21, respectively.
2) The inner tenon 41 and the outer tenon 42 are steel structures which are embedded in the anchoring inner ring beam 11 or the building envelope 20/outer ring beam 21.
It should be noted that the above two methods are only preferred application embodiments, and other methods can be selected to form the inner tenon and the outer tenon on the opposite sides of the inner ring beam and the outer ring beam, but it is necessary to ensure that the connection between the inner tenon and the outer tenon and the inner ring beam has enough strength to bear large stress at the connection part to avoid breaking.
In practical application, after the prestressing force is loaded by the force applying device, in order to enhance the connection stability between the support structure and the enclosure structure in the pit, the inner tenon and the outer tenon of the mortise and tenon component can be locked in a welding, grouting or mechanical connection mode, and the locking direction is, for example, locking in a direction perpendicular to the direction of the force applying device, locking in a direction parallel to the direction of the force applying device, bidirectional locking and the like.
In the utility model, the inner tenon 41 and the outer tenon 42 are respectively perpendicular to the inner support structure 10 and the enclosure structure 20 in the pit, the relative positions of the inner tenon and the outer tenon in the vertical prestressing direction are arranged according to the design requirement, for example, the inner tenon and the outer tenon are alternately distributed or staggered between the support structure 10 and the enclosure structure 20, the matching modes of the inner tenon and the outer tenon include but are not limited to concave-convex, convex-convex and concave-concave combinations, and the convex-convex is arranged at left and right intervals to ensure the bidirectional locking perpendicular to the horizontal direction of the force application device. Two exemplary embodiments of two mortise and tenon assemblies 40 are illustrated below.
As shown in fig. 2-5, in one embodiment, the inner tenon 41 is provided with a notch for inserting the outer tenon 42, and the outer tenon 42 is wholly inserted into the notch or partially inserted into the notch, i.e. the inner tenon and the outer tenon are matched in a convex shape. A structural joint 43 (shown in figure 4) of 10-100 mm is reserved between the inner tenon 41 and the outer tenon 42, and the jack is sealed by grouting material 44 after the axial force is applied (shown in figure 5); and (3) along with the continuous excavation of the foundation pit, when the deformation is increased, the axial force of the jack is applied again, and after the application is finished, a new crack generated between the inner tenon and the outer tenon is sealed and filled again by grouting material 44.
As shown in fig. 6-9, another embodiment is shown in which the inner tenons 41 and the outer tenons 42 are vertical block structures provided on opposite sides of the inner and outer ring beams 11 and 21, respectively, with a convex-like fit therebetween. A structural joint 43 (shown in figure 8) of 10-100 mm is reserved between the inner tenon 41 and the outer tenon 42, and the jack is sealed by grouting material 44 after the axial force is applied (shown in figure 9); and (3) along with the continuous excavation of the foundation pit, when the deformation is increased, the axial force of the jack is applied again, and after the application is finished, a new crack generated between the inner tenon and the outer tenon is sealed and filled again by grouting material.
The above description is of the preferred embodiment of the utility model. It is to be understood that the utility model is not limited to the particular embodiments described above, in that devices and structures not described in detail are understood to be implemented in a manner common in the art; those skilled in the art can make many possible variations and modifications to the disclosed embodiments, or modify equivalent embodiments to equivalent variations, without departing from the spirit of the utility model, using the methods and techniques disclosed above. Therefore, any simple modification, equivalent change and modification made to the above embodiments according to the technical essence of the present invention are still within the scope of the protection of the technical solution of the present invention, unless the contents of the technical solution of the present invention are departed.
Claims (9)
1. A supporting system with a safety device for actively controlling foundation pit displacement comprises an in-pit supporting structure (10), a building enclosure (20) and a force application device (30), wherein the force application device (30) is used for loading prestress to the in-pit supporting structure (10) and the building enclosure (20), the force application device (30) is composed of a plurality of force application devices (31) arranged between the in-pit supporting structure (10) and the building enclosure (20), and the supporting system is characterized in that,
a safety device consisting of a plurality of mortise and tenon components (40) is arranged between the pit inner support structure (10) and the enclosure structure (20), each mortise and tenon component (40) consists of an inner tenon (41) connected with the pit inner support structure (10) and an outer tenon (42) connected with the enclosure structure (20), the inner tenon and the outer tenons (41 and 42) are mutually matched to improve the stability between the pit inner support structure (10) and the enclosure structure (20) in the vertical prestress direction, and the inner tenons and the outer tenons (41 and 42) can relatively move in the prestress direction when the prestress is loaded by the stress application device (30).
2. The support system with the safety device for actively controlling foundation pit displacement according to claim 1, wherein the opposite sides of the support structure (10) and the enclosure structure (20) in the pit are provided with an inner ring beam (11) and an outer ring beam (21), respectively.
3. The support system with the safety device for actively controlling foundation pit displacement according to claim 1 or 2, wherein the inner tenon (41) and the outer tenon (42) are perpendicular to the inner pit support structure (10) and the enclosure structure (20), respectively.
4. The foundation pit support system with safety device for actively controlling displacement according to claim 3, wherein the inner tenon (41) is provided with a notch for inserting the outer tenon (42), the outer tenon (42) is integrally inserted into the notch or partially inserted into the notch, and the outer tenon (42) inserted into the notch and the inner tenon (41) are relatively fixed in a vertical prestressing direction.
5. The foundation pit support system with safety device for actively controlling displacement according to claim 1, wherein the inner tenon (41) and the outer tenon (42) are arranged in a 1:1 staggered arrangement, a 1:2 clamping arrangement or a 2:1 clamping arrangement to ensure relative fixation between the inner tenon (41) and the outer tenon (42) in a vertical prestressing direction.
6. The excavation supporting system with safety device according to claim 2,
the inner tenon (41) and the outer tenon (42) are of a concrete structure internally provided with shear steel bars, and the shear steel bars are respectively anchored into the inner ring beam (11) or the enclosure structure (20); or,
the inner tenon (41) and the outer tenon (42) are steel structures, and the steel structures are respectively embedded into the inner ring beam (11) or the enclosure structure (20).
7. The foundation pit support system with safety device for actively controlling displacement according to claim 2, wherein the inner tenon (41) and the outer tenon (42) are square steel pipes and the inside is a structure of grouted concrete, and one end of the square steel pipe is anchored in the inner ring beam (11) or the outer ring beam (21).
8. The foundation pit support system with safety device for actively controlling displacement of the foundation pit according to claim 1, wherein after the prestressing of the stressing device (30) is completed, the inner tenon and the outer tenon (41 and 42) are fixed with the support structure (10) in the pit and the enclosure structure (20) by welding, pouring grout or mechanical connection so as to lock the prestressing applied by the stressing device.
9. The foundation pit support system with the safety device for actively controlling the displacement of the foundation pit as claimed in claim 8, wherein a construction gap (43) with the thickness of 10 mm-100 mm is reserved between the inner tenon and the outer tenon (41, 42) which are matched with each other, and the construction gap (43) is sealed by grouting material (44) after the prestressing force is loaded on the stress applying device (31).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121812914.XU CN215759048U (en) | 2021-08-04 | 2021-08-04 | Supporting system with safety device for actively controlling foundation pit displacement |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121812914.XU CN215759048U (en) | 2021-08-04 | 2021-08-04 | Supporting system with safety device for actively controlling foundation pit displacement |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN215759048U true CN215759048U (en) | 2022-02-08 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202121812914.XU Active CN215759048U (en) | 2021-08-04 | 2021-08-04 | Supporting system with safety device for actively controlling foundation pit displacement |
Country Status (1)
| Country | Link |
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| CN (1) | CN215759048U (en) |
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2021
- 2021-08-04 CN CN202121812914.XU patent/CN215759048U/en active Active
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Address after: 200093 No. 38 Shui Feng Road, Yangpu District, Shanghai. Patentee after: Shanghai Survey, Design and Research Institute (Group) Co.,Ltd. Address before: 200093 No. 38 Shui Feng Road, Yangpu District, Shanghai. Patentee before: SGIDI ENGINEERING CONSULTING (Group) Co.,Ltd. |