CN215801678U - Bridge cushion cap foundation pit doubly-linked arch type enclosure structure - Google Patents
Bridge cushion cap foundation pit doubly-linked arch type enclosure structure Download PDFInfo
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- CN215801678U CN215801678U CN202122246366.5U CN202122246366U CN215801678U CN 215801678 U CN215801678 U CN 215801678U CN 202122246366 U CN202122246366 U CN 202122246366U CN 215801678 U CN215801678 U CN 215801678U
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Abstract
The utility model provides a bridge bearing platform foundation pit double-connection arch-shaped enclosure structure which comprises a plurality of cast-in-place pile enclosure assemblies arranged along the edge of a bridge bearing platform foundation pit, wherein the first cast-in-place pile enclosure assemblies are correspondingly arranged at the positions of corners of the foundation pit, and the second cast-in-place pile enclosure assembly is arranged between the two first cast-in-place pile enclosure assemblies and is in occlusion connection with the first cast-in-place pile enclosure assemblies; the second bored concrete pile encloses and keeps off the subassembly and includes two arch bored concrete pile spare that set up side by side, and encloses with the third bored concrete pile respectively and keep off the subassembly interlock and be connected, and the convex surface of arch bored concrete pile spare is towards the bridge cushion cap foundation ditch outside. The utility model is provided with the arched cast-in-place pile member, utilizes the arch effect of the circular structure to convert the bending and pulling internal force of the structure into the annular axial force to resist the deformation of the arched structure, so as to better resist the water and soil pressure load action of the whole enclosure structure, obviously improve the compression resistance and soil retaining and water stopping of the enclosure structure, and can shorten the construction period and reduce the construction cost without arranging an internal support or an external anchor.
Description
Technical Field
The utility model relates to the technical field of foundation pit engineering, in particular to a bridge bearing platform foundation pit doubly-linked arch type enclosure structure.
Background
The foundation pit support is a retaining, reinforcing and protecting measure adopted for the side wall of the foundation pit and the surrounding environment in order to ensure the safety of the construction of an underground structure and the surrounding environment of the foundation pit. The foundation pit support is widely applied to engineering, the support forms are various, factors such as engineering geology, construction progress and engineering cost are combined, and the selection of a proper foundation pit support scheme is of great importance. The bridge bearing platform foundation pit is different from a building foundation pit and a subway station foundation pit and is very special. The common size is small, the difference of the length, width and height dimensions is not large, the common size is within 10m, and the individual sizes are large.
Common supporting structures in bridge bearing platform foundation pit construction comprise steel sheet piles, lock catch steel cast-in-place piles, underground diaphragm walls, occlusive piles and the like, the steel sheet piles have good water stopping effect, but the overall structure rigidity is low, and the deformation resistance is poor; the integral rigidity of the lock catch steel cast-in-place pile structure is higher, but the water stop effect is poorer, and the construction period is longer; the cement mixing pile and the high-pressure jet grouting occlusive pile have lower construction cost, but have poorer integral rigidity. The different foundation pit support structures have certain application conditions and advantages and disadvantages, a certain number of inner supports or outer anchors can be correspondingly arranged, the construction cost is high, and the integral rigidity, the deformation resistance and the construction cost of the structure cannot be considered at the same time.
SUMMERY OF THE UTILITY MODEL
The utility model aims to provide a bridge bearing platform foundation pit doubly-linked arch type enclosure structure, which solves the problem that the existing enclosure structure cannot give consideration to the integral rigidity, the deformation resistance and the construction cost.
The utility model provides a bridge bearing platform foundation pit doubly-linked arch type enclosure structure which comprises a plurality of first cast-in-place pile enclosure assemblies, a plurality of second cast-in-place pile enclosure assemblies and a plurality of third cast-in-place pile enclosure assemblies, wherein the plurality of first cast-in-place pile enclosure assemblies, the plurality of second cast-in-place pile enclosure assemblies and the plurality of third cast-in-place pile enclosure assemblies are arranged along the edge of a bridge bearing platform foundation pit;
the first cast-in-place pile enclosure assemblies are correspondingly arranged at the corners of the foundation pit of the bridge bearing platform, and the second cast-in-place pile enclosure assembly is arranged between the two first cast-in-place pile enclosure assemblies and is in occlusion connection with the first cast-in-place pile enclosure assemblies;
the second bored concrete pile encloses and keeps off the subassembly and includes two arch bored concrete pile spare, two arch bored concrete pile spare sets up side by side, and the tip respectively with the third bored concrete pile encloses and keeps off the subassembly interlock and connect, the convex surface orientation of arch bored concrete pile spare the bridge cushion cap foundation ditch outside.
The bridge cushion cap foundation pit doubly-linked arch type enclosure structure provided by the utility model has the following beneficial effects: the utility model sets two arched filling pile parts on each side of the bridge bearing platform foundation pit, namely, a first filling pile retaining component is combined to enclose a double-arch type enclosure structure form, the bending and pulling internal force of the structure is converted into the circumferential axial force by utilizing the circular structure arch effect to resist the deformation of the arch structure, the rigidity of each corner position is strengthened by the first filling pile retaining component, and the rigidity of the joint of the two arched filling pile parts is strengthened by the third filling pile retaining component to better resist the water and soil pressure load action of the whole enclosure structure, so that the compression resistance and the soil and water retaining performance of the enclosure structure are obviously improved, meanwhile, the stress is reasonable, the structural deformation is small, and for the common non-large bridge bearing platform foundation pit, the construction period can be shortened and the construction cost can be reduced because the inner support or the outer anchor does not need to be set.
In addition, the bridge bearing platform foundation pit doubly-linked arch type enclosure structure provided by the utility model can also have the following additional technical characteristics:
further, first bored concrete pile encloses fender subassembly and includes three major diameter angle stake, three major diameter angle stake along the corner position edge setting of bridge cushion cap foundation ditch, and along the corner angular bisector symmetry setting of bridge cushion cap foundation ditch.
Furthermore, each inside first reinforcement that is equipped with of major diameter angle stake, the inside first reinforcement that all is equipped with of three major diameter angle stakes, first reinforcement is recoverable H shaped steel.
Furthermore, the arched cast-in-place pile part comprises a leading cast-in-place pile and a trailing cast-in-place pile which are staggered and sequentially connected, and the diameter of the leading cast-in-place pile is smaller than that of the trailing cast-in-place pile;
the second reinforcement is arranged in the antecedent cast-in-place pile, the second reinforcement is a reinforcement cage with a square cross section, the third reinforcement is arranged in the posterior cast-in-place pile, and the third reinforcement is a reinforcement cage with a circular cross section.
Further, the end of the arched cast-in-place pile member close to the third cast-in-place pile enclosure assembly is the rear cast-in-place pile.
Further, third bored concrete pile fender subassembly includes two at least third bored concrete piles, two at least third bored concrete pile sets up side by side and interlock each other and connect.
Furthermore, the third cast-in-place pile encloses and keeps off the subassembly and locates the middle part position on each limit of bridge cushion cap foundation ditch, the inside of third cast-in-place pile is equipped with first reinforcement.
Further, the arch axis of the second cast-in-place pile enclosure assembly is in a circular arc shape.
Further, the double-connection arch type envelope structure further comprises an arch-shaped crown beam assembly, the arch-shaped crown beam assembly comprises two arch-shaped crown beam pieces, the two arch-shaped crown beam pieces are arranged side by side and are integrally connected, and the two arch-shaped crown beam pieces are respectively and correspondingly connected with the tops of the two arch-shaped cast-in-place pile pieces.
Additional aspects and advantages of the utility model will be set forth in part in the description which follows and, in part, will be obvious from the description, or may be learned by practice of the utility model.
Drawings
The above and/or additional aspects and advantages of the present invention will become apparent and readily appreciated from the following description of the embodiments, taken in conjunction with the accompanying drawings of which:
FIG. 1 is a schematic overall structure diagram of a bridge bearing platform foundation pit doubly-linked arch type enclosure structure according to an embodiment of the utility model;
fig. 2 is a schematic structural view of a first cast-in-place pile surround assembly according to an embodiment of the present invention;
fig. 3 is a schematic structural view of a second cast-in-place pile surround assembly according to an embodiment of the present invention;
fig. 4 is a schematic structural view of a third cast-in-place pile surround assembly according to an embodiment of the present invention;
FIG. 5 is a schematic structural view of an arched crown beam assembly according to an embodiment of the present invention.
| |
100 | Bridge bearing |
200 |
| First bored concrete pile encloses |
10 | Large- |
11 |
| First reinforcing |
12 | |
121 |
| |
122 | Second bored concrete pile encloses fender subassembly | 20 |
| Arch-shaped cast-in- |
21 | |
211 |
| Rear-row cast-in- |
222 | |
223 |
| Third reinforcing member | 224 | Third bored concrete pile encloses fender subassembly | 30 |
| Third cast-in- |
31 | Arched |
40 |
| Arched |
41 |
Detailed Description
In order to make the objects, features and advantages of the present invention comprehensible, embodiments accompanied with figures are described in detail below. Several embodiments of the utility model are presented in the drawings. This invention may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete.
Referring to fig. 1, an embodiment of the present invention provides a double-arch enclosure 100 for a bridge bearing platform foundation pit, which includes a plurality of first cast-in-place pile retaining assemblies 10, a plurality of second cast-in-place pile retaining assemblies 20, and a third cast-in-place pile retaining assembly 30 disposed along an edge of the bridge bearing platform foundation pit 200.
The first cast-in-place pile enclosure assemblies 10 are correspondingly arranged at the corner positions of the bridge bearing platform foundation pit 200, and the second cast-in-place pile enclosure assembly 20 is arranged between the two first cast-in-place pile enclosure assemblies 10 and is in occlusion connection with the first cast-in-place pile enclosure assemblies 10;
second bored concrete pile encloses fender subassembly 20 includes two arch bored concrete pile spare 21, two arch bored concrete pile spare 21 sets up side by side, and the tip respectively with third bored concrete pile encloses fender subassembly 30 interlock and connects, the convex surface orientation of arch bored concrete pile spare 21 the bridge cushion cap foundation ditch 200 outside.
In this embodiment, the cast-in-place piles of the first cast-in-place pile enclosure assembly 10 and the second cast-in-place pile enclosure assembly 20 are both cast-in-place piles, concrete is filled in the cast-in-place piles, the engagement connection of the present invention refers to embedded fixed connection through concrete, the bridge bearing platform foundation pit 200 is generally rectangular and has four corners, according to the construction design of the bridge bearing platform, the first cast-in-place pile enclosure assemblies 10 are respectively arranged at the four corners, the second cast-in-place pile enclosure assembly 20 is arranged between the two first cast-in-place pile enclosure assemblies 10, and the end portions of the two enclosure assemblies are connected, so that the first cast-in-place pile enclosure assemblies 10 and the second cast-in-place pile enclosure assemblies 20 are used for enclosing the enclosure structure 100, so as to protect the side walls of the bridge bearing platform foundation pit 200.
Wherein, second bored concrete pile encloses fender subassembly 20 and includes two arch bored concrete pile spare 21, two arch bored concrete pile spare 21 sets up side by side, and the tip respectively with third bored concrete pile encloses fender subassembly 30 interlock and connects, sets up doubly-linked arch type envelope 100 on each limit of bridge cushion cap foundation ditch 200 promptly. The curvature of the arched cast-in-place pile member 21 is determined according to the water and soil pressure around the foundation pit and the construction site conditions.
It will be appreciated that the second cast-in-place pile retaining assembly 20 resembles an arched beam and is a circular curve, because the bridge bearing platform foundation pit is generally small in size, slightly different in three-dimensional size of length, width and height, and approximately square in shape in plan, the arch axis can be set to be a circular arc, and the curvature of the circular arc is determined by the pressure of the surrounding water and soil and the conditions of the construction site. The cast-in-place pile enclosure assembly 10 is similar to an arch support of each arch beam of a bridge, the enclosure structure 100 of the utility model generates horizontal counter force at the arch support of the arch structure after vertical force action to resist the deformation of the enclosure structure 100, and the arch beams are mainly in a compression state to fully exert the compression capacity of the arch beams, so that the enclosure structure 100 has the advantages of good soil retaining and water stopping effects, reasonable stress, small lateral deformation of the structure and the like.
From the above description, the beneficial effects of the present invention are: the utility model sets two arched filling pile parts 21 on each side of a bridge bearing platform foundation pit 200, namely, a first filling pile retaining component 10 is combined to form a double-connection arched enclosure structure 100, the bending and pulling internal force of the structure is converted into the circumferential axial force by utilizing the circular structure arch effect to resist the deformation of the arched structure, the rigidity of each corner position is enhanced by the first filling pile retaining component 10, the rigidity of the joint of the two arched filling pile parts is enhanced by a third filling pile retaining component 30 to better resist the water and soil pressure load action of the whole enclosure structure 100, so that the compression resistance and soil and water retaining of the enclosure structure 100 are obviously improved, meanwhile, the stress is reasonable, the structural deformation is small, and the construction period can be shortened and the construction cost can be reduced because an inner support or an outer anchor is not needed for a common non-large bridge bearing platform foundation pit.
Referring to fig. 2, in the present embodiment, the first cast-in-place pile retaining assembly 10 includes three large-diameter corner piles 11, and the three large-diameter corner piles 11 are disposed along the edge of the corner position of the bridge bearing platform foundation pit 200 and symmetrically disposed along the corner angle bisector of the bridge bearing platform foundation pit 200.
It can be understood that the three large-diameter corner piles 11 are arranged to surround the corner edge positions of the bridge bearing platform foundation pit 200, so that the rigidity of each corner position is improved, the whole enclosure structure 100 is better resistant to the action of water and soil pressure loads, and the compression resistance and the soil retaining and water stopping of the enclosure structure 100 are obviously improved. During specific construction, the large-diameter corner pile 11 located in the middle is firstly constructed, and then two large-diameter corner piles 11 located on two sides and meshed with the large-diameter corner pile are constructed.
Each inside first reinforcement 12 that is equipped with of major diameter angle stake 11, first reinforcement is recoverable H shaped steel, and H shaped steel formula as an organic whole is connected, and H shaped steel includes two flange boards 121 and web 122, two flange board 121 is parallel to each other and the interval corresponds the setting, web 122 is located between two flange boards 121, and both ends respectively with two flange board 121 is connected perpendicularly. By inserting the recyclable H-shaped steel reinforcing piece into the large-diameter angle pile 11, the rigidity of the large-diameter angle pile 11 can be enhanced, the deformation of the whole enclosure structure 100 is reduced, and the stability of the foundation pit enclosure structure 100 is further enhanced.
Referring to fig. 3, the arched cast-in-place pile 21 includes a leading cast-in-place pile 211 and a trailing cast-in-place pile 222 that are staggered and sequentially connected in an embedded manner, the diameter of the leading cast-in-place pile 211 is smaller than the diameter of the trailing cast-in-place pile 222, the leading cast-in-place pile 211 is a cast-in-place pile that is constructed in advance as the name suggests, the trailing cast-in-place pile 222 is a cast-in-place pile that is constructed in the trailing direction, and the diameter of the leading cast-in-place pile 211 is smaller than the diameter of the trailing cast-in-place pile 222, so that the trailing cast-in-place pile 222 and the leading cast-in-place pile 211 can be constructed in an interlocking manner.
The second reinforcement 223 is arranged inside the leading cast-in-place pile 211, the cross section of the second reinforcement 223 is square, specifically, the second reinforcement 223 is a reinforcement cage with a square cross section, the inside of the trailing cast-in-place pile 222 is provided with a third reinforcement 224, the cross section of the third reinforcement 224 is circular, specifically, the third reinforcement 224 is a reinforcement cage with a circular cross section. The concrete construction sequence is A1-A2-B1-A3-B2.
The shape of the second reinforcement 223 in the leading cast-in-place pile 211 is set to be circular, on one hand, the occlusion area between the second reinforcement 223 and the trailing cast-in-place pile 222 is increased, and on the other hand, the reinforcement cages are arranged in the leading cast-in-place pile 211 and the trailing cast-in-place pile 222, so that the overall rigidity of the enclosure structure 100 can be obviously improved, and the overall stability of the foundation pit is improved.
Referring to fig. 5, after the leading cast-in-place pile 211 and the trailing cast-in-place pile 222 reach the designed strength, a double-arch connecting beam, i.e., an arch-shaped crown beam assembly 40, is constructed on the pile top, the arch-shaped crown beam assembly 40 includes two arch-shaped crown beam members 41, the two arch-shaped crown beam members 41 are arranged side by side and integrally connected, so that the secant pile forms a double-arch integral enclosure structure 100, and then the excavation construction of the foundation pit is performed. And after the drilling depth construction reaches the design elevation of the hole bottom, the hole depth and the hole diameter are checked to ensure that the requirements of design and specification are met.
It can be understood that lateral water and soil pressure acts on the body of the arched cast-in-place pile 21, the pile body deforms, and the added pile top double-arch arched crown beam 41 can effectively restrain the deformation of the pile top and bear part of the soil pressure acting on the pile body.
Referring to fig. 4, the third cast-in-place pile enclosure assembly 30 is disposed at the middle of each edge of the bridge bearing platform foundation pit 200, and the third cast-in-place pile enclosure assembly 30 is disposed at the joint of the two arched cast-in-place pile members 21 to enhance the rigidity of the joint, thereby improving the overall rigidity of the enclosure.
The third cast-in-place pile surround assembly 30 includes at least two third cast-in-place piles 31, in this embodiment, two third cast-in-place piles 31 are included, in other embodiments, the number of the third cast-in-place piles 31 is set according to actual needs, and two of the third cast-in-place piles 31 are set side by side and connected to each other. The third cast-in-place pile 31 is provided with a first reinforcing member 12 inside, and the first reinforcing member 12 is specifically an integrally formed H-shaped steel for reinforcing the rigidity inside the third cast-in-place pile 31. The end of arched cast-in-place pile member 21 close to third cast-in-place pile enclosure assembly 30 is rear cast-in-place pile 222, and rear cast-in-place pile 222 with a larger diameter is engaged with third cast-in-place pile 31 of third cast-in-place pile enclosure assembly, so that the engagement area can be increased, and the connection strength between rear cast-in-place pile 222 and third cast-in-place pile 31 can be increased.
The above-mentioned embodiments only express several embodiments of the present invention, and the description thereof is more specific and detailed, but not construed as limiting the scope of the present invention. It should be noted that, for a person skilled in the art, several variations and modifications can be made without departing from the inventive concept, which falls within the scope of the present invention. Therefore, the protection scope of the present patent shall be subject to the appended claims.
Claims (9)
1. A bridge bearing platform foundation pit doubly-linked arch-shaped enclosure structure is characterized by comprising a plurality of first cast-in-place pile enclosure assemblies, a plurality of second cast-in-place pile enclosure assemblies and a plurality of third cast-in-place pile enclosure assemblies, wherein the plurality of first cast-in-place pile enclosure assemblies, the plurality of second cast-in-place pile enclosure assemblies and the plurality of third cast-in-place pile enclosure assemblies are arranged along the edge of a bridge bearing platform foundation pit;
the first cast-in-place pile enclosure assemblies are correspondingly arranged at the corners of the foundation pit of the bridge bearing platform, and the second cast-in-place pile enclosure assembly is arranged between the two first cast-in-place pile enclosure assemblies and is in occlusion connection with the first cast-in-place pile enclosure assemblies;
the second bored concrete pile encloses and keeps off the subassembly and includes two arch bored concrete pile spare, two arch bored concrete pile spare sets up side by side, and the tip respectively with the third bored concrete pile encloses and keeps off the subassembly interlock and connect, the convex surface orientation of arch bored concrete pile spare the bridge cushion cap foundation ditch outside.
2. The bridge cushion cap foundation pit doubly-linked arch enclosure of claim 1, wherein the first bored pile surround assembly includes three large diameter angle piles disposed along corner position edges of the bridge cushion cap foundation pit and symmetrically disposed along a corner angle bisector of the bridge cushion cap foundation pit.
3. The bridge bearing platform foundation pit doubly-linked arch type enclosure structure of claim 2, wherein a first reinforcing member is arranged inside each of the three large-diameter angle piles, and the first reinforcing member is made of recyclable H-shaped steel.
4. The bridge cushion cap foundation pit doubly-linked arch type enclosure structure of claim 1, wherein the arch-shaped cast-in-place pile member comprises a leading cast-in-place pile and a trailing cast-in-place pile which are staggered and sequentially connected, and the diameter of the leading cast-in-place pile is smaller than that of the trailing cast-in-place pile;
the second reinforcement is arranged in the antecedent cast-in-place pile, the second reinforcement is a reinforcement cage with a square cross section, the third reinforcement is arranged in the posterior cast-in-place pile, and the third reinforcement is a reinforcement cage with a circular cross section.
5. The bridge cushion cap foundation pit doubly-linked arch type enclosure structure of claim 4, wherein the end of the arch-shaped cast-in-place pile member near the third cast-in-place pile enclosure assembly is the trailing cast-in-place pile.
6. The bridge bearing platform foundation pit doubly-linked arch type enclosure structure of claim 4, wherein the third cast-in-place pile enclosure assembly comprises at least two third cast-in-place piles, and at least two of the third cast-in-place piles are arranged side by side and are in meshed connection with each other.
7. The bridge bearing platform foundation pit doubly-linked arch type enclosure structure of claim 1, wherein the third cast-in-place pile enclosure assembly is arranged at a middle position of each side of the bridge bearing platform foundation pit, and a first reinforcing member is arranged inside the third cast-in-place pile.
8. The bridge cushion cap foundation pit doubly-linked arch enclosure of claim 1, wherein an arch axis of the second cast-in-place pile surround assembly is arc-shaped.
9. The bridge cushion cap foundation pit doubly-linked arch type enclosure structure of any one of claims 1 to 8, wherein the doubly-linked arch type enclosure structure further comprises an arch-shaped crown beam assembly, the arch-shaped crown beam assembly comprises two arch-shaped crown beam pieces, the two arch-shaped crown beam pieces are arranged side by side and integrally connected, and the two arch-shaped crown beam pieces are respectively and correspondingly connected with the tops of the two arch-shaped cast-in-place pile pieces.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122246366.5U CN215801678U (en) | 2021-09-16 | 2021-09-16 | Bridge cushion cap foundation pit doubly-linked arch type enclosure structure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122246366.5U CN215801678U (en) | 2021-09-16 | 2021-09-16 | Bridge cushion cap foundation pit doubly-linked arch type enclosure structure |
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| Publication Number | Publication Date |
|---|---|
| CN215801678U true CN215801678U (en) | 2022-02-11 |
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|---|---|---|---|
| CN202122246366.5U Active CN215801678U (en) | 2021-09-16 | 2021-09-16 | Bridge cushion cap foundation pit doubly-linked arch type enclosure structure |
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- 2021-09-16 CN CN202122246366.5U patent/CN215801678U/en active Active
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