CN219796333U - Push counter-force balancing device for large-section push pipe of soft soil foundation - Google Patents
Push counter-force balancing device for large-section push pipe of soft soil foundation Download PDFInfo
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- CN219796333U CN219796333U CN202320954225.5U CN202320954225U CN219796333U CN 219796333 U CN219796333 U CN 219796333U CN 202320954225 U CN202320954225 U CN 202320954225U CN 219796333 U CN219796333 U CN 219796333U
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- soft soil
- guide rail
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- 239000002689 soil Substances 0.000 title claims abstract description 39
- 229910000831 Steel Inorganic materials 0.000 claims abstract description 122
- 239000010959 steel Substances 0.000 claims abstract description 122
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims abstract description 22
- 229910052742 iron Inorganic materials 0.000 claims abstract description 11
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims description 2
- 229910052799 carbon Inorganic materials 0.000 claims description 2
- 238000005266 casting Methods 0.000 claims description 2
- 238000010276 construction Methods 0.000 abstract description 26
- 238000000034 method Methods 0.000 abstract description 8
- 238000004873 anchoring Methods 0.000 abstract description 6
- 230000008901 benefit Effects 0.000 abstract description 5
- 230000002787 reinforcement Effects 0.000 description 6
- 238000005516 engineering process Methods 0.000 description 3
- 239000002131 composite material Substances 0.000 description 2
- 238000007667 floating Methods 0.000 description 2
- 230000000712 assembly Effects 0.000 description 1
- 238000000429 assembly Methods 0.000 description 1
- 238000009412 basement excavation Methods 0.000 description 1
- 235000000396 iron Nutrition 0.000 description 1
- 230000009916 joint effect Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000000518 rheometry Methods 0.000 description 1
- 229920006395 saturated elastomer Polymers 0.000 description 1
- 238000003756 stirring Methods 0.000 description 1
Abstract
The utility model provides a pushing counter-force balancing device for a large-section jacking pipe of a soft soil foundation, which comprises a pile raft foundation arranged in a working well, wherein the pile raft foundation comprises a raft plate and a pulling-resistant pile anchored below the raft plate, the top of the raft plate is provided with a steel guide rail, and the steel guide rail is detachably connected with a pushing component. The steel corbels are fixed on the steel guide rails through the lengthened high-strength bolts, the jack is arranged in the steel frame, the steel frame is connected with the strip-shaped steel members, the strip-shaped steel members are connected with the steel corbels, the top iron is connected with the jack, pushing reaction force is transmitted to the steel guide rails, the raft and the soil layer through the steel corbels, the vertical bearing capacity for resisting bottom plate settlement and uplift and the horizontal bearing capacity for preventing bottom plate slip and warping are provided by utilizing the pile-pulling-resistant anchoring pile-raft foundation, the problem that the structural rigidity of the traditional back wall reaction force is insufficient due to low bearing capacity and high compressibility of soil in the construction process of large-section jacking pipes in coastal soft soil areas is solved, the construction cost is reduced, and the economic benefit is improved.
Description
Technical Field
The utility model relates to the technical field of push pipe pushing construction, in particular to a push pipe pushing counter-force balancing device for a large-section push pipe of a soft soil foundation.
Background
The pipe jacking technology is a non-excavation pipeline buried construction technology for continuously jacking pipe joints into soil layers by means of pushing devices such as hydraulic jacks and the like. The pipe jacking technology solves the problems of damaging surrounding original buildings, influencing the original road traffic and the like in the pipeline burying construction to a certain extent, and makes great contribution to civilized construction of cities.
In the traditional pipe jacking engineering construction, a back wall behind an originating well is mainly used for providing a jacking force for a pushing device. The back wall can bear pushing reaction force generated by the pushing device in the pipe jacking construction, and the deformation of the back wall and the jacking angle of the pipe jacking are required to be controlled. In coastal soft soil areas, the rear back wall is difficult to ensure enough rigidity to resist huge jacking force due to easy soil rheology, and accidents are very easy to generate in pipe jacking engineering.
In order to solve the thrust problem of the pipe jacking engineering in the soft soil area, chinese patent 201910510655.6 discloses a counterforce structure for the pipe jacking operation of the super-large section of the soft soil foundation, which provides thrust for the soft soil area through a combined structure of steel corbels, a bottom plate, a composite foundation and a prestressed anchor rod. However, the counterforce structure needs to perform jet grouting pile filling reinforcement on soil body below the bottom plate, and needs to use a prestressed anchor rod for reinforcement between the bottom plate and the composite foundation, so that the working procedure is complex, the construction period is long, and the economic benefit is low.
Disclosure of Invention
The utility model aims to solve the technical problem of providing the pushing counter-force balancing device for the large-section jacking pipe in the soft soil foundation, which can simplify the pushing structure, simplify the construction process, shorten the construction time and provide safe and stable pushing force for the large-section rectangular jacking pipe engineering in the coastal saturated soft soil area.
The utility model is realized in the following way:
in a first aspect, the utility model provides a pushing counter-force balancing device for a large-section jacking pipe of a soft soil foundation, which comprises a pile raft foundation arranged in a working well, wherein the pile raft foundation comprises a raft plate and uplift piles anchored below the raft plate, a steel guide rail is arranged at the top of the raft plate, and a pushing assembly is detachably connected with the steel guide rail.
Further, the pushing component comprises a steel bracket, a strip steel member, a top iron, a steel frame and a jack, wherein the steel bracket is fixed on the steel guide rail through a lengthening high-strength bolt, the jack is arranged in the steel frame, the steel frame is connected with the strip steel member, the strip steel member is connected with the steel bracket, and the top iron is connected with the telescopic end of the jack.
Further, through holes are formed in the bottoms of the steel corbels, and the lengthened high-strength bolts penetrate through the through holes and are in spiral connection with the steel guide rails.
Further, the steel guide rail is provided with a plurality of groups of threaded holes matched with the lengthened high-strength bolts at intervals.
Further, the anti-pulling pile is a constant-section anti-pulling pile, a bottom-expanding anti-pulling pile or a miniature anti-pulling pile.
Further, the raft is formed by casting concrete with the carbon number of 40 or more.
The utility model provides a construction method of a soft soil foundation large-section jacking pipe, which is based on the pushing counter-force balancing device of the soft soil foundation large-section jacking pipe, and comprises the following steps:
s1: after a working well excavates and reinforces soil at a top pipe hole, constructing a uplift pile in the opposite direction of top pipe jacking, wherein a pile head of the uplift pile is reserved with a main rib and a stirrup which are anchored with a raft;
s2: pouring the uplift pile main reinforcement and the stirrups which are anchored upwards to the raft reinforcement together with the raft to form a pile raft foundation, reserving a space for installing the steel guide rail, embedding the steel guide rail in the reserved space after the pile raft foundation concrete reaches the corresponding strength, and performing secondary pouring to fill the gap between the steel guide rail and the raft;
s3: the steel corbels are fixed with pre-buried steel guide rails in the raft through the lengthened high-strength bolts, and the side surfaces of the steel corbels are connected with the strip-shaped steel members through bolts to provide counter-force support for the jack;
s4: uniformly arranging steel frames at equal intervals along the horizontal direction of the strip-shaped steel members, connecting the steel frames with the strip-shaped steel members through bolts, and respectively arranging a plurality of jacks in the corresponding steel frames;
s5: the jacking iron is abutted to the cross section of the pipe joint, jacking force generated by the joint action of the jacking pipes along with the plurality of jacks is jacked forward, jacking counter force is transmitted to the steel guide rail, the raft and the soil layer through the strip steel member and the steel corbels, and then the anti-pulling piles provide vertical bearing capacity of settlement and uplift and horizontal bearing capacity of sliding and warping to the raft;
s6: whenever the jacking pipe is jacked for a preset distance, the lengthened high-strength bolt connecting the steel corbel and the steel guide rail is disassembled, and the steel corbel is moved to one side of the advancing direction of the jacking pipe;
s7, repeating the steps S3-S6 until the pipe jacking construction is completed.
Further, concrete with more than C40 is adopted for pouring the raft.
The utility model has the advantages that: the rotary jet grouting pile or the stirring pile in the prior art is replaced by a prefabricated anti-pulling pile, so that the construction process can be simplified, and the construction time is shortened. Meanwhile, on one hand, the utility model uses the lengthened high-strength bolt to connect the steel guide rail in the raft, replaces the traditional method of connecting the steel corbel with the embedded steel sleeve box in the bottom plate through the bolt, and transmits the pushing reaction force to the steel guide rail, the raft and the soil layer through the steel corbel, so that the anchoring structure is more stable; on the other hand, the anti-floating pile anchoring pile-raft foundation is utilized to provide vertical bearing capacity for resisting bottom plate settlement and uplift and horizontal bearing capacity for preventing bottom plate slippage and warping, so that the problem of insufficient rigidity of a traditional back wall counter-force structure caused by low bearing capacity and high compressibility of soil in the construction process of the large-section top pipe in a coastal soft soil area is solved, the construction cost is reduced, the economic benefit is improved, and meanwhile, the construction safety of the top pipe is ensured.
Drawings
The utility model will be further described with reference to examples of embodiments with reference to the accompanying drawings.
Fig. 1 is a schematic structural view of the present utility model.
Fig. 2 is a detailed view of the arrangement of the jack, bar-shaped steel member and steel corbel of the present utility model.
Fig. 3 is a sectional view showing the arrangement of jacks according to the present utility model for practical jacking pipes and jacking irons.
Fig. 4 is a cross-sectional view of the steel corbel lengthening high-strength bolt and the piled raft foundation of the utility model.
Fig. 5 is a plan view of a steel corbel and steel rail of the present utility model.
Fig. 6 is a schematic flow chart of the construction of the present utility model.
The reference numerals in the figures illustrate:
1. pulling-resistant piles; 2. a raft; 3. a top iron; 4. a steel frame; 5. a jack; 6. a strip steel member; 7. steel corbels; 8. a steel guide rail; 9. and (5) lengthening the high-strength bolt.
Detailed Description
Example 1
Referring to fig. 1 to 5, the utility model provides a pushing counter force balancing device for a large-section jacking pipe of a soft soil foundation, which comprises a raft plate 2 and a pile raft foundation formed by combining anti-pulling piles 1 anchored below the raft plate 2, and further comprises a pushing assembly consisting of steel brackets 7, strip steel members 6, a jacking iron 3, a steel frame 4 and jacks 5, wherein the jacking iron 3 and the steel frame 4 for placing the jacks 5 are arranged on the raft plate 2, the steel frame 4 is supported by the strip steel members 6, the strip steel members 6 are abutted against each other by the steel brackets 7 at corresponding positions, the steel brackets 7 are triangular steel members, long right-angle sides are arranged on the surfaces of the raft plate 2, three through holes are respectively formed in two sides of each steel bracket 7, the steel brackets are fixed with steel guide rails 8 embedded in the raft plate 2 through long and high-strength bolts 9, and the short right-angle sides are also connected with the strip steel members 6 in a bolt manner, and the pushing counter force of the jacks 5 is balanced together by combining with the strip steel members 6. And a plurality of groups of bolt holes are preset on the steel guide rail along the length direction of the steel guide rail, and along with jacking construction of the jacking pipe, the steel corbels need to correspondingly replace fixed positions along the steel guide rail.
The raft is formed by pouring concrete with the diameter of C40 or more, the pile raft foundation is an anchor foundation of a raft combined uplift pile, the uplift pile can be replaced by pile foundations of different types such as a constant-section uplift pile, a bottom-expanding uplift pile, a miniature uplift pile and the like according to the uplift requirement of actual engineering, and the diameter, the length and the number of the piles are determined by combining the actual soil layer condition of the engineering and the section area of a jacking pipe.
According to the engineering of different jacking pipe shapes, the jacks and the jack steel frames can be uniformly arranged in other forms, and the corresponding jacking iron shapes also need to be changed according to the arrangement form of the jacks.
According to actual engineering, the steel corbel can be replaced by steel members with other shapes like triangles, trapezoids or trapezoids, and the hole positions and the hole numbers of the bolts can be adjusted according to the shapes.
Example two
Referring to fig. 6, the utility model provides a construction method of a soft soil foundation large-section jacking pipe, based on a pushing counter-force balancing device of the soft soil foundation large-section jacking pipe in the first embodiment, comprising the following steps:
s1: after a working well excavates and reinforces soil at a pipe jacking hole, constructing a prefabricated uplift pile 1 in the opposite direction of pipe jacking, reserving main ribs and stirrups with enough anchoring depth at the pile head of the uplift pile 1, and ensuring the connection reliability of the uplift pile 1 and a raft;
s2: as shown in fig. 1, pouring main reinforcements and stirrups of the uplift pile 1 which are upwards anchored to the raft reinforcement together with the raft 2 to form a pile raft foundation, reserving enough space for the steel guide rails 8, embedding the pile raft foundation concrete into the steel guide rails 8 after the pile raft foundation concrete reaches corresponding strength, and performing secondary pouring to fill a gap between the steel guide rails 8 and the raft 2;
s3: as shown in fig. 5, the steel corbels 7 are triangular steel members, long right-angle sides are arranged on the surface of the raft 2, three equidistant through holes are respectively formed in two sides of the steel corbels 7, the lengthened high-strength bolts 9 penetrate through the through holes to be fixed with the pre-buried steel guide rails 8 in the raft 2, and the short right-angle sides are connected with the strip-shaped steel members 6 through bolts to provide counter-force support for the jack 5;
s4: as shown in fig. 2, the steel frames 4 are uniformly arranged at equal intervals along the horizontal direction of the strip-shaped steel members 6, the steel frames 4 are connected with the strip-shaped steel members 6 through bolts, and a plurality of jacks 5 are respectively arranged in the steel frames 4;
s5: as shown in fig. 1, the top iron 3 is abutted against the cross section of the pipe joint, the top pipe is pushed forward along with the pushing force generated by the combined action of the plurality of jacks 5, the pushing reaction force is transmitted to the steel guide rail 8, the raft board 2 and the soil layer through the strip steel members 6 and the steel corbels 7, and then the anti-pulling pile group 1 provides the vertical bearing capacity of settlement and uplift and the horizontal bearing capacity of slippage and warping to the raft board 2;
s6: the long high-strength bolts 9 connecting the steel corbels 7 and the steel guide rails 8 are detached every time the pipe is jacked for a certain distance, and of course, in order to accelerate the construction progress, the strip-shaped steel members 6 and the steel corbels 7 can be used as temporary assemblies, and are also fixed to the bolt holes 10 reserved in the advancing direction of the pipe through the long high-strength bolts 9 along the direction of the steel guide rails 8.
S7, repeating the steps S3-S6, and continuously carrying out jacking pipe construction for a plurality of times.
According to the utility model, on one hand, the steel guide rail is connected in the raft by using the lengthened high-strength bolt, so that the method of connecting the steel corbel with the embedded steel sleeve box in the bottom plate by using the bolt in the past is replaced, the pushing reaction force is transmitted to the steel guide rail, the raft and the soil layer by the steel corbel, and the anchoring structure is more stable; on the other hand, the anti-floating pile anchoring pile-raft foundation is utilized to provide vertical bearing capacity for resisting bottom plate settlement and uplift and horizontal bearing capacity for preventing bottom plate slippage and warping, so that the problem of insufficient rigidity of a traditional back wall counter-force structure caused by low bearing capacity and high compressibility of soil in the construction process of the large-section top pipe in a coastal soft soil area is solved, the construction cost is reduced, the economic benefit is improved, and meanwhile, the construction safety of the top pipe is ensured.
While specific embodiments of the utility model have been described above, it will be appreciated by those skilled in the art that the specific embodiments described are illustrative only and not intended to limit the scope of the utility model, and that equivalent modifications and variations of the utility model in light of the spirit of the utility model will be covered by the claims of the present utility model.
Claims (6)
1. A push counter force balancing device of a soft soil foundation large-section push pipe is characterized in that: the pile raft foundation comprises a raft plate and a uplift pile anchored below the raft plate, wherein a steel guide rail is arranged at the top of the raft plate, and a pushing component is detachably connected with the steel guide rail.
2. The large-section jacking pipe pushing counter-force balancing device for soft soil foundations according to claim 1, wherein: the pushing component comprises a steel bracket, a strip-shaped steel member, a top iron, a steel frame and a jack, wherein the steel bracket is fixed on the steel guide rail through a lengthening high-strength bolt, the jack is arranged in the steel frame, the steel frame is connected with the strip-shaped steel member, the strip-shaped steel member is connected with the steel bracket, and the top iron is connected with the telescopic end of the jack.
3. The large-section jacking pipe pushing counter-force balancing device for the soft soil foundation according to claim 2, wherein: the bottom of steel bracket is provided with the through-hole, the extension high strength bolt passes through the through-hole and screwed connection with the steel guide rail.
4. The large-section jacking pipe pushing counter-force balancing device for the soft soil foundation according to claim 2, wherein: the steel guide rail is provided with a plurality of groups of bolt holes matched with the lengthened high-strength bolts at intervals.
5. The large-section jacking pipe pushing counter-force balancing device for soft soil foundations according to claim 1, wherein: the uplift pile is a constant-section uplift pile, a bottom-expanding uplift pile or a miniature uplift pile.
6. The large-section jacking pipe pushing counter-force balancing device for soft soil foundations according to claim 1, wherein: the raft is formed by casting concrete with the carbon number of more than 40.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202320954225.5U CN219796333U (en) | 2023-04-25 | 2023-04-25 | Push counter-force balancing device for large-section push pipe of soft soil foundation |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202320954225.5U CN219796333U (en) | 2023-04-25 | 2023-04-25 | Push counter-force balancing device for large-section push pipe of soft soil foundation |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN219796333U true CN219796333U (en) | 2023-10-03 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202320954225.5U Active CN219796333U (en) | 2023-04-25 | 2023-04-25 | Push counter-force balancing device for large-section push pipe of soft soil foundation |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN219796333U (en) |
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2023
- 2023-04-25 CN CN202320954225.5U patent/CN219796333U/en active Active
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