CN215801679U - Bias pressure foundation pit double-layer pipe pile and steel sheet pile combined enclosing structure - Google Patents
Bias pressure foundation pit double-layer pipe pile and steel sheet pile combined enclosing structure Download PDFInfo
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- CN215801679U CN215801679U CN202122260457.4U CN202122260457U CN215801679U CN 215801679 U CN215801679 U CN 215801679U CN 202122260457 U CN202122260457 U CN 202122260457U CN 215801679 U CN215801679 U CN 215801679U
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Abstract
The utility model provides a bias foundation pit double-layer tubular pile and steel sheet pile combined enclosure structure which comprises tubular pile components arranged at each corner of a bias foundation pit and steel sheet pile enclosure components arranged between every two adjacent tubular pile components; the pipe pile assembly comprises a plurality of double-layer pipe piles which are continuously arranged along the edge of the corner of the bias foundation pit; be equipped with double steel sheet pile at the bias voltage side of bias voltage foundation ditch and enclose fender subassembly, parallel to each other and the interval corresponds the setting, and double steel sheet pile encloses and keeps off to connect through a plurality of first mountings between the subassembly. According to the utility model, the double-layer tubular piles are continuously arranged at the corner positions, so that the rigidity of the corners is greatly enhanced, the enclosure structure is enclosed by combining the steel sheet pile enclosure components, the integral rigidity of the enclosure structure can be increased, meanwhile, the double-row steel sheet pile enclosure components are arranged at the bias side of the bias foundation pit, the lateral rigidity of the enclosure structure at the bias side of the foundation pit can be increased, the integral stability of the enclosure structure is improved, and the double-row steel sheet pile enclosure components have good economical efficiency and construction safety compared with the prior art.
Description
Technical Field
The utility model relates to the technical field of foundation pit engineering, in particular to a bias foundation pit double-layer pipe pile and steel sheet pile combined enclosing structure.
Background
With the development of traffic construction in China, foundation pit engineering is more and more, and bias foundation pits caused by various reasons such as unbalanced pile loading outside a pit, unbalanced excavation inside the pit, overlarge difference of the rigidity of stratums at two sides of the foundation pit and the like are also common. For example, a bearing platform foundation pit such as an adjacent embankment, an adjacent river, an adjacent steep slope and the like is particularly easy to cause bias, and the bias load causes the deformation of the foundation pit and the change of a stress mode. Therefore, how to select a proper foundation pit supporting mode for the bias foundation pit under the complex geological condition becomes a key difficult problem which needs to be solved urgently by designers and construction technologies. The commonly used foundation pit support structures at present comprise a steel plate pile cofferdam, a lock catch steel pipe pile cofferdam, a filling pile cofferdam, a ground connecting wall and the like.
Compared with other types, the steel sheet pile cofferdam has obvious waterproof effect and good sealing performance, meanwhile, the construction cost is cheaper and the construction progress is fast, and the steel sheet pile cofferdam is common in the application of foundation pit engineering. But because the structure has smaller rigidity, poorer anti-collision capability and deformation resistance, the underwater foundation construction requirement with larger depth is difficult to meet. If all the large-rigidity supporting piles similar to steel pipe piles, cast-in-place piles and the like are adopted, structures such as waterproof curtains and the like are often required to be arranged, the cost is high, and the construction period is long. In addition, for the bias foundation pit, measures such as stratum reinforcement and support increase are usually adopted to ensure the safety of the foundation pit, but the construction difficulty and the engineering cost are increased. And for deep foundation pits with complex hydrogeological conditions, the construction for reinforcing the stratum is often difficult.
SUMMERY OF THE UTILITY MODEL
The utility model aims to provide a bias foundation pit double-layer pipe pile and steel sheet pile combined enclosure structure, which solves the problems of poor stability and higher cost of the traditional bias foundation pit enclosure structure.
The utility model provides a bias foundation pit double-layer tubular pile and steel sheet pile combined enclosure structure which comprises tubular pile components arranged at each corner of a bias foundation pit and steel sheet pile enclosure components arranged between every two adjacent tubular pile components;
the pipe pile assembly comprises a plurality of double-layer pipe piles which are continuously arranged along the edge of the corner of the bias foundation pit;
the steel sheet pile encloses and keeps off the subassembly the bias voltage side of bias voltage foundation ditch is equipped with double the steel sheet pile encloses and keeps off the subassembly and parallel to each other and the interval corresponds the setting, double the steel sheet pile encloses and keeps off and connect through a plurality of first mountings between the subassembly.
According to the bias pressure foundation pit double-layer tubular pile and steel sheet pile combined enclosing structure provided by the utility model, the following beneficial effects are achieved: according to the utility model, the double-layer tubular piles are continuously arranged at the corner position, so that the rigidity of the corner is greatly enhanced, the enclosure structure is enclosed by combining the steel sheet pile enclosure components, the integral rigidity of the enclosure structure can be increased, meanwhile, the double-row steel sheet pile enclosure components are arranged at the bias side of the bias foundation pit, so that the lateral rigidity of the enclosure structure at the bias side of the foundation pit can be increased to better resist the action of active soil pressure at the bias side, further, the force transmission and the structural deformation are reduced, and the effect of improving the integral stability of the enclosure structure is achieved.
In addition, the bias foundation pit double-layer pipe pile and steel sheet pile combined enclosing structure provided by the utility model can also have the following additional technical characteristics:
further, double-deck tubular pile includes first tubular pile ring and the second tubular pile ring of coaxial setting, first tubular pile ring sets up the inboard of second tubular pile ring, first tubular pile ring with the both ends of second tubular pile ring are connected through the second mounting respectively.
Further, first tubular pile ring includes the steel reinforcement cage skeleton, follows a plurality of prestressing steel spare of equidistant distribution of steel reinforcement cage skeleton to and fill and be in first concrete layer in the steel reinforcement cage skeleton, a plurality of prestressing steel spare with the steel reinforcement cage skeleton is connected.
Furthermore, the steel sheet pile enclosure assembly comprises a plurality of first enclosure plates and a plurality of second enclosure plates which are arranged in a staggered mode;
the first enclosure baffle comprises a first main steel plate and first side steel plates respectively connected to two ends of the first main steel plate, the two first side steel plates are positioned on the same side, and the first main steel plate is attached to the side wall of the bias foundation pit;
the second enclosure baffle comprises a second main steel plate and second side steel plates respectively connected to two ends of the second main steel plate, and the two second side steel plates are positioned on the same side;
the free end of the first side steel plate is connected with the free end of the second side steel plate, and the free end of the other first side steel plate is connected with the free end of the second side steel plate of the other second apron plate.
Furthermore, a first hook part is arranged at the free end of the first side steel plate, a second hook part is arranged at the free end of the second side steel plate, and the first hook part and the second hook part are in occlusion connection;
combination envelope still includes the fore shaft frame, the fore shaft frame is followed by a plurality of fore shaft roof beams the tubular pile subassembly with the inboard end to end connection of fender subassembly is enclosed to the steel sheet pile forms.
Furthermore, each corner position of the fore shaft frame is provided with a corner support piece, one end of each corner support piece is connected with one fore shaft beam, and the other end of each corner support piece is connected with the other adjacent fore shaft beam.
Furthermore, a pair of supporting pieces is arranged in the middle of the fore shaft frame along the length direction, one end of each supporting piece is connected with one fore shaft beam, and the other end of each supporting piece is connected with the other opposite fore shaft beam.
Further, the second main steel plate is attached to the fore shaft beam.
And further, adjacent, a first grouting curtain is arranged in a connecting gap of the double-layer tubular pile, and a second grouting curtain is arranged in a connecting gap of the end part of the steel plate pile enclosure assembly and the double-layer tubular pile.
Furthermore, a waterproof filler layer is arranged on the outer side of the steel sheet pile enclosure assembly.
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 top view of a bias foundation pit double-layer pipe pile and steel sheet pile combined enclosure structure according to an embodiment of the utility model;
fig. 2 is a schematic cross-sectional structure view of a double-layer tubular pile according to an embodiment of the utility model;
FIG. 3 is a cross-sectional view of a steel sheet pile surround assembly of an embodiment of the present invention;
fig. 4 is a schematic perspective view of a steel sheet pile fence assembly according to an embodiment of the present invention.
Reference numerals:
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 bias foundation pit double-layer pipe pile and steel sheet pile combined enclosure structure 100, including pipe pile assemblies 10 disposed at each corner of the bias foundation pit, and steel sheet pile enclosure assemblies 20 arranged between each adjacent pipe pile assemblies 10.
It should be noted that the shape of the enclosure structure 100 of the present invention is adapted to the shape of the bias foundation pit, if the shape of the bias foundation pit is polygonal such as rectangular, pentagonal, or hexagonal, the shape of the enclosure structure 100 is also adapted to polygonal such as rectangular, pentagonal, or hexagonal, the pipe pile assemblies 10 need to be disposed at each corner of the polygonal bias foundation pit, and the steel sheet pile enclosure assembly 20 needs to be disposed between the adjacent double-layer pipe piles 11 to enclose the polygonal enclosure structure 100, and the enclosure structure 100 of the present invention is preferably applied to the rectangular or approximately rectangular bias foundation pit, in this embodiment, the shape of the bias foundation pit is rectangular.
The tubular pile assembly 10 comprises a plurality of double-layer tubular piles 11 which are continuously arranged along the corner edges of the bias foundation pit, in the embodiment, four corners are arranged, the double-layer tubular piles 11 which are continuously arranged are arranged along the inner edges of the corners at each corner, and the double-layer tubular piles 11 are symmetrical to each other along the angle bisectors of the corners. It can be understood that the double-layer tubular piles 11 are continuously arranged at the corner positions, so that the rigidity of the corners is greatly enhanced.
Referring to fig. 2, the double-layer tubular pile 11 includes a first tubular pile ring 111 and a second tubular pile ring coaxially disposed, the first tubular pile ring 111 is disposed inside the second tubular pile ring 112, that is, the diameter of the first tubular pile ring 111 is smaller than that of the second tubular pile ring 112, the top ends of the first tubular pile ring 111 and the second tubular pile ring 112 are connected by a second fixing member, specifically, the second fixing member is an end steel plate, and the two tubular pile rings are connected and fixed by end steel plates disposed at the top and the bottom.
First tubular pile ring 111 includes steel reinforcement cage skeleton 1111, follows a plurality of prestressing steel pieces 1112 of steel reinforcement cage skeleton 1111 equidistant distribution, and fills in first concrete layer 1113 in the steel reinforcement cage skeleton 1111, a plurality of prestressing steel pieces 1112 with steel reinforcement cage skeleton 1111 connects, first tubular pile ring 111 with second tubular pile ring 112's structure is the same.
Double-deck tubular pile 11 is by standardized prefabricated processing preparation, and first tubular pile ring 111 and second tubular pile ring 112 constitute by concrete, steel reinforcement cage and a plurality of prestressing steel, and prestressing steel is equidistant distribution along the steel reinforcement cage. Prestressed reinforcement 1112 is hooped by several layers of reinforcement cages, and the reinforcement cages are made of spiral reinforcements and distributed in the middle of first tubular pile ring 111 and second tubular pile ring 112. The plurality of prestressed reinforcement pieces 1112 arranged in the utility model enhance the rigidity of the tubular pile ring, and the double layers, namely the first tubular pile ring 111 and the second tubular pile ring 112 are arranged at the same time, so that the rigidity of the tubular pile is further enhanced, and the rigidity of the corner of the enclosure structure 100 is increased.
In specific implementation, the center line of the combined enclosure structure 100 is set out according to a foundation pit construction drawing, and meanwhile, a control pile and a leveling point are arranged in a piling area. And positioning the double-layer tubular pile 11 according to the control points, measuring and placing other pile positions according to the pile position arrangement diagram, and marking the center of the pile position by using a steel bar. The construction method is characterized in that a hammer method is adopted for pile driver construction, a double-layer pipe pile 11 is embedded and fixed in two guide piles of a pile frame by using a guide slide clamp or a guide pile hoop of the pile frame of the pile driver, the pile is vertically aligned with the center of a pile and is slowly inserted and driven, after the pile position and the verticality are corrected, a pile hammer of the pile driver and a pile cap are pressed on the pile, and then the pile is slowly sunk to the designed elevation. And moving the pile driver to a new pile position, sequentially inserting and driving the double-layer tubular piles 11 according to the steps, and circularly finishing the inserting and driving arrangement of the double-layer tubular piles 11 on each side edge of the foundation pit in the first stage. The arrangement range of the double-layer tubular piles 11 is determined according to the design size of the foundation pit cofferdam.
As shown in fig. 1, two rows of the steel sheet pile retaining assemblies 20 are arranged on the bias side of the bias foundation pit, the two rows of the steel sheet pile retaining assemblies 20 are parallel to each other and are arranged at intervals in a corresponding manner, and the two rows of the steel sheet pile retaining assemblies 20 are vertically connected through a plurality of first fixing members 24.
The foundation pit is biased due to various reasons such as unbalanced pile loading outside the pit, unbalanced excavation inside the pit, overlarge difference of the rigidity of stratums at two sides of the foundation pit and the like, and one side of the enclosure structure 100, which is subjected to larger load, of the foundation pit is called as a biased side and mainly bears active soil pressure; the other side, referred to as the unbiased side, is subjected primarily to passive earth pressure.
From the above description, the beneficial effects of the present invention are: according to the utility model, the double-layer tubular piles are continuously arranged at the corner position, so that the rigidity of the corner is greatly enhanced, the enclosure structure is enclosed by combining the steel sheet pile enclosure components, the integral rigidity of the enclosure structure can be increased, meanwhile, the double-row steel sheet pile enclosure components are arranged at the bias side of the bias foundation pit, so that the lateral rigidity of the enclosure structure at the bias side of the foundation pit can be increased to better resist the action of active soil pressure at the bias side, further, the force transmission and the structural deformation are reduced, and the effect of improving the integral stability of the enclosure structure is achieved.
Referring to fig. 3 and 4, the steel sheet pile enclosure assembly 20 is formed by connecting a plurality of U-shaped structures, and includes a plurality of first enclosure plates 21 and a plurality of second enclosure plates 22, which are arranged in a staggered manner;
the first baffle 21 comprises a first main steel plate 211 and first side steel plates 212 respectively connected to two ends of the first main steel plate 211, the two first side steel plates 212 are located on the same side, and the first main steel plate 211 is attached to the side wall of the bias foundation pit;
the second apron 22 comprises a second main steel plate 221 and second side steel plates 222 respectively connected to two ends of the second main steel plate 221, and the two second side steel plates 222 are located on the same side;
the free end of the first side steel plate is connected with the free end of the second side steel plate, and the free end of the other first side steel plate is connected with the free end of the second side steel plate of the other second apron plate. Specifically, the free end of the first side steel plate is provided with a first hook part 213, the free end of the second side steel plate is provided with a second hook part 223, and the first hook part 213 is engaged with the second hook part 223. Fig. 4 is an overall view of the hook portion of the first apron 21 and the second apron 22 formed by inserting and beating the hooks to be self-engaged.
In this embodiment, the two ends of the steel sheet pile enclosure assembly 20 are respectively a first main steel sheet 21, and the first main steel sheet 21 is connected with the top solid of the double-layer tubular pile 11, so that the enclosure structure 100 forms a closed whole, thereby improving the overall stability and rigidity of the enclosure structure 100.
It can be appreciated that the foundation pit bias side guard structure 100 is under greater active earth pressure, and the bending moment and deformation of the foundation pit bias side guard structure 100 will be greater than the non-bias side. Therefore, the prefabricated double-row U-shaped steel plate piles are arranged on the bias side of the foundation pit and welded into an integral structure through the first fixing pieces 24, specifically, the first fixing pieces 24 are split steel bars in the embodiment, so that the lateral rigidity and the bending resistance of the bias side protection structure 100 of the foundation pit can be improved, the active soil pressure on the bias side is better resisted, the force transmission and the structural deformation are reduced, and the effect of improving the integral stability of the protection structure 100 is achieved. The first main steel plate 21 is closely attached to the bias foundation pit, and can resist the water and soil pressure.
According to the utility model, the double-layer tubular piles 11 are continuously arranged at the corner positions, so that the rigidity of the corners is greatly enhanced, and the enclosure structure 100 is enclosed by combining the steel sheet pile enclosure assembly 20, so that the overall rigidity of the enclosure structure 100 can be increased.
In this embodiment, the combined enclosure structure 100 further includes a locking notch frame 30, and the locking notch frame 30 is formed by connecting a plurality of locking notch beams 31 along the tubular pile assembly 10 and the inside of the steel sheet pile enclosure assembly 20 end to end.
Each corner position of the fore shaft frame 30 is provided with a gusset 40, in this example, the gusset 40 is a steel pipe, one end of the gusset 40 is connected to one fore shaft beam 31, and the other end of the gusset 40 is connected to another adjacent fore shaft beam 31. The second main steel plate 221 is attached to the fore shaft beam 31 to improve the stability of the fore shaft frame 30 and the steel sheet pile fence assembly 20.
The middle of the fore shaft frame 30 along the length direction is provided with a pair of supporting members 50, in this embodiment, the pair of supporting members 50 are steel pipes, one end of each supporting member 50 is connected to one fore shaft beam 31, and the other end is connected to the other fore shaft beam 31.
In this embodiment, four fore-and-aft-welding four corner supporting members 40 at four corners of the fore-and-aft-welding frame 30, respectively welding two ends of the butt-supporting member 50 at the middle part of the fore-and-aft-welding frame 30 along the length direction, welding an integral structure outside the foundation pit in advance, lifting and hoisting the integral body by a crane after installation and lowering the integral body into the foundation pit cofferdam, and fixing the integral structure to the combined enclosure structure 100 by a bracket. It can be understood that the fore shaft 31 not only can maintain the plane shape of the building envelope 100 after pile construction, so that the steel pipe angle support 40 and the steel pipe counter support 50 are stressed uniformly, but also can increase the overall rigidity of the combined building envelope 100. Meanwhile, a plurality of locking beams 31 and supporting members are arranged according to the excavation size of the foundation pit and the surrounding geological conditions.
It is adjacent be equipped with first slip casting curtain in double-deck tubular pile 11's the joint gap, be located the outside double-deck tubular pile 11 with be equipped with the second slip casting curtain in the joint gap of steel sheet pile fender subassembly 20 tip. The outside of the steel sheet pile enclosure assembly 20 is provided with a waterproof filler layer.
It can be understood that after the construction of the integral structure of the combined enclosure structure 100 is completed, the influence of the water is considered particularly because the connection between the adjacent double-layer tubular piles 11 and the connection between the double-layer tubular pile 11 and the steel sheet pile enclosure assembly 20 cannot be completely closed during the construction, and a slight gap is formed. If the foundation pit is not watered during excavation, the problems can not be considered; if water occasionally during the foundation ditch excavation, need set up the slip casting curtain in the department of hugging closely of 11 piles of adjacent double-deck tubular pile and double-deck tubular pile 11 and steel sheet pile enclosure subassembly 20, follow simultaneously the steel sheet pile outside sets up leak protection water filler to avoid water to ooze into in envelope 100.
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 (10)
1. A bias foundation pit double-layer tubular pile and steel sheet pile combined enclosure structure is characterized by comprising tubular pile components arranged at each corner of a bias foundation pit and steel sheet pile enclosure components arranged between every two adjacent tubular pile components;
the pipe pile assembly comprises a plurality of double-layer pipe piles which are continuously arranged along the edge of the corner of the bias foundation pit;
the steel sheet pile encloses and keeps off the subassembly the bias voltage side of bias voltage foundation ditch is equipped with double the steel sheet pile encloses and keeps off the subassembly and parallel to each other and the interval corresponds the setting, double the steel sheet pile encloses and keeps off and connect through a plurality of first mountings between the subassembly.
2. The combined enclosure structure of the double-layer tubular pile and the steel sheet pile of the bias foundation pit according to claim 1, wherein the double-layer tubular pile comprises a first tubular pile ring and a second tubular pile ring which are coaxially arranged, the first tubular pile ring is arranged on the inner side of the second tubular pile ring, and two ends of the first tubular pile ring and the second tubular pile ring are respectively connected through a second fixing piece.
3. The bias pressure foundation pit double-layer tubular pile and steel sheet pile combined enclosing structure according to claim 2, characterized in that the first tubular pile ring comprises a reinforcement cage framework, a plurality of prestressed reinforcement pieces distributed at equal intervals along the reinforcement cage framework, and a first concrete layer filled in the reinforcement cage framework, and the plurality of prestressed reinforcement pieces are connected with the reinforcement cage framework.
4. The bias pressure foundation pit double-layer pipe pile and steel sheet pile combined enclosure structure of claim 1, wherein the steel sheet pile enclosure assembly comprises a plurality of first enclosure plates and a plurality of second enclosure plates which are arranged in a staggered mode;
the first enclosure baffle comprises a first main steel plate and first side steel plates respectively connected to two ends of the first main steel plate, the two first side steel plates are positioned on the same side, and the first main steel plate is attached to the side wall of the bias foundation pit;
the second enclosure baffle comprises a second main steel plate and second side steel plates respectively connected to two ends of the second main steel plate, and the two second side steel plates are positioned on the same side;
the free end of the first side steel plate is connected with the free end of the second side steel plate, and the free end of the other first side steel plate is connected with the free end of the second side steel plate of the other second apron plate.
5. The bias pressure foundation pit double-layer pipe pile and steel sheet pile combined enclosure structure of claim 4, wherein a first hook part is arranged at the free end of the first side steel plate, a second hook part is arranged at the free end of the second side steel plate, and the first hook part and the second hook part are connected in an occlusion manner;
combination envelope still includes the fore shaft frame, the fore shaft frame is followed by a plurality of fore shaft roof beams the tubular pile subassembly with the inboard end to end connection of fender subassembly is enclosed to the steel sheet pile forms.
6. The bias pressure foundation pit double-layer pipe pile and steel sheet pile combined enclosure structure of claim 5, wherein a gusset piece is arranged at each corner position of the locking port frame, one end of the gusset piece is connected with one locking port beam, and the other end of the gusset piece is connected with the other adjacent locking port beam.
7. The bias pressure foundation pit double-layer pipe pile and steel sheet pile combined enclosure structure of claim 6, wherein a pair of supporting pieces is arranged in the middle of the fore shaft frame along the length direction, one end of each supporting piece is connected with one fore shaft beam, and the other end of each supporting piece is connected with the other opposite fore shaft beam.
8. The bias pressure foundation pit double-layer pipe pile and steel sheet pile combined enclosure structure of claim 5, wherein the second main steel plate is attached to the fore shaft beam.
9. The combined enclosure structure for the double-layer tubular pile and the steel sheet pile of the bias foundation pit according to claim 1, wherein a first grouting curtain is arranged in a connecting gap between adjacent double-layer tubular piles, and a second grouting curtain is arranged in a connecting gap between the end part of the double-layer tubular pile and the end part of the steel sheet pile enclosure assembly positioned on the outermost side.
10. The bias pressure foundation pit double-layer pipe pile and steel sheet pile combined enclosure structure of claim 9, wherein the outside of the steel sheet pile enclosure assembly is provided with a waterproof filler layer.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202122260457.4U CN215801679U (en) | 2021-09-17 | 2021-09-17 | Bias pressure foundation pit double-layer pipe pile and steel sheet pile combined enclosing structure |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202122260457.4U CN215801679U (en) | 2021-09-17 | 2021-09-17 | Bias pressure foundation pit double-layer pipe pile and steel sheet pile combined enclosing structure |
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