CN217325444U - Combined open caisson suitable for rock - Google Patents
Combined open caisson suitable for rock Download PDFInfo
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- CN217325444U CN217325444U CN202220796500.0U CN202220796500U CN217325444U CN 217325444 U CN217325444 U CN 217325444U CN 202220796500 U CN202220796500 U CN 202220796500U CN 217325444 U CN217325444 U CN 217325444U
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E10/00—Energy generation through renewable energy sources
- Y02E10/20—Hydro energy
Abstract
The utility model discloses a combined open caisson applicable to rocks; the open caisson comprises an open caisson main body with a high coverage soil layer; the upper part of the open caisson main body is sequentially provided with a brick built-up wall and a ring beam which are communicated with the ground through the brick built-up wall and the ring beam which are sequentially connected; the lower end of the open caisson main body is provided with an inverted hanging well; the top plate of the inverted hanging well is positioned in the open caisson main body and is connected with the lower end of the open caisson main body, and the cutting edge at the upper end of the open caisson main body is connected with the top plate; a pipe jacking pipeline is arranged on the side wall of the inverted well close to the bottom, and a newly-built inspection well is arranged in the center of the bottom; a newly-built precast concrete inspection shaft is arranged at the upper end of the newly-built inspection well; the upper end of the newly-built precast concrete inspection shaft is provided with a concrete shaft ring, a cast iron well cover and a support; and the newly-built inspection well and the newly-built precast concrete inspection shaft are both cast in place by adopting a concrete cast-in-place mode, and the surrounding upstream surfaces of the inner side wall are sprayed with water-based permeable concrete protective agents. The utility model discloses can prevent that the open caisson from causing the condition of card in the rock because inhomogeneous settlement under the rock stratum.
Description
Technical Field
The utility model relates to a plumbing push pipe construction technical field, in particular to combination formula open caisson suitable for rock.
Background
In the prior art, a construction process of a water supply and drainage pipe jacking project mainly adopts an open caisson process, when the open caisson encounters a rock soil layer in the sinking process, the technical difficulty required for sinking is high, and the open caisson can sink after the rock layer is broken by adopting an air pick, machinery or blasting mode.
Also, an improper blasting operation occurring in order to increase the construction speed may occur to damage the open caisson.
When the open caisson encounters a rock soil layer, the technical difficulty required for sinking is large, the rock breaking difficulty is high, rock strata need to be broken by adopting modes such as air picks, machinery or blasting in construction, and the condition that the open caisson is obliquely clamped in the rock strata due to uneven sinking of the open caisson often occurs when the open caisson sinks.
Therefore, for the condition that the open caisson foundation is located on the rock, how to avoid the risk that the open caisson is stuck in the rock stratum in the sinking period, reduce the workload of breaking the rock, and ensure the safety and reliability of the open caisson structure becomes a technical problem which needs to be solved urgently by the technical personnel in the field.
SUMMERY OF THE UTILITY MODEL
In view of the above-mentioned defect of prior art, the utility model provides a combination formula open caisson suitable for rock, the purpose of realization makes the cost lower, and construction convenience can effectively prevent the open caisson at the rock sink in-process because uneven settlement and the combination formula open caisson of open caisson inclined card in the stratum that leads to.
In order to achieve the purpose, the utility model discloses a combined open caisson applicable to rocks, which is arranged from the ground to the bottom and comprises a soil layer and a rock layer in sequence; comprises a main open caisson body which highly covers the soil layer.
The open caisson comprises a caisson main body, a brick built-up wall and a ring beam, wherein the brick built-up wall and the ring beam are sequentially arranged above the caisson main body and are communicated with the ground through the brick built-up wall and the ring beam which are sequentially connected;
the lower end of the open caisson main body is provided with an inverted hanging well;
the top plate of the inverted hanging well is positioned in the open caisson main body and is connected with the lower end of the open caisson main body;
the parts of the inverted wells below the top plate are all positioned in the rock layer, and the cutting edge at the upper ends of the inverted wells is connected with the top plate;
a pipe jacking pipeline is arranged on the side wall of the inverted well close to the bottom, and a newly-built inspection well is arranged in the center of the bottom;
a newly-built precast concrete inspection shaft is arranged at the upper end of the newly-built inspection well and is connected with the ground;
the upper end of the newly-built precast concrete inspection shaft is provided with a concrete shaft ring, a cast iron well cover and a support;
the newly-built inspection well and the newly-built precast concrete inspection shaft are both cast in place by adopting a concrete cast-in-place mode, two layers are sprayed on the upstream surfaces of the periphery of the inner side wall, and the total impervious grade requirement is not less than that of the water-based permeable concrete protective agent P6;
during construction, the inverted well serves as a structural support for building the pipe-jacking pipeline, and a construction space is provided for building the pipe-jacking pipeline.
Preferably, the open caisson main body, the inverted hanging well and the ring beam are all made of reinforced concrete materials.
Preferably, the inner diameter of the open caisson main body is 6000mm to 8000 mm;
the inner diameter of the inverted well is 4500mm to 7000 mm;
the diameter of the pipe jacking pipeline is 800 mm-1600 mm.
Preferably, a plurality of drain pipes are arranged between the brick laid wall hanging wall and the ring beam and around the side wall.
More preferably, each drain pipe is a PVC pipe with the diameter of 50 mm;
the distance between every two adjacent drain pipes is 2 m.
Preferably, the pipe-jacking pipeline is a reinforced concrete pipe or a steel pipe and is constructed by a rock pipe-jacking machine.
Preferably, the connection surface of the inverted hanging well and the top plate and the connection surface of the top plate and the cutting edge are provided with a plurality of water-swelling rubber water stop strips in the circumferential direction.
More preferably, a water stop strip placing groove is reserved in the position, corresponding to each water-swelling rubber water stop strip, of the inverted hanging well and the open caisson main body in concrete pouring.
Preferably, the brick laid wall built by laying is built by using MU15 non-clay solid bricks and M10 cement mortar.
Preferably, a steel pipe handrail with the height not less than 1.2m is arranged at the inlet position of the ground on the ring beam.
The utility model has the advantages that:
the utility model has the advantages of convenient construction, simple process, small working face, low cost, small rock breaking workload, good sealing performance, good waterproof performance and the like.
The utility model discloses a go up the construction mode that sinks to hang down, can prevent that the open caisson from sinking the process in the stratum and causing the condition of open caisson slope card in the rock because inhomogeneous settlement.
The utility model discloses an open caisson is whole to be located the lithosphere top, and reserves safe distance between sword foot and the overhead well for the construction breaks the construction mode that can adopt miniature blasting in the rock process, thereby accelerates construction speed under the prerequisite of guaranteeing that the open caisson does not receive destruction.
The conception, the specific structure and the technical effects of the present invention will be further described with reference to the accompanying drawings, so as to fully understand the objects, the features and the effects of the present invention.
Drawings
Fig. 1 shows a planar template diagram according to an embodiment of the present invention.
Fig. 2 shows a schematic cross-sectional view at AA of fig. 1 according to the present invention.
Detailed Description
Examples
As shown in fig. 1 and 2, the combined open caisson for rock is arranged from the ground to the bottom and comprises a soil layer 13 and a rock layer 14; the open caisson comprises an open caisson main body 1 with a high coverage soil layer 13;
a brick built-up wall 5 and a ring beam 6 are sequentially arranged above the open caisson main body 1 and are communicated with the ground through the brick built-up wall 5 and the ring beam 6 which are sequentially connected;
the lower end of the open caisson main body 1 is provided with an inverted hanging well 2;
the top plate of the inverted well 2 is positioned in the open caisson main body 1 and is connected with the lower end of the open caisson main body 1;
the part of the inverted well 2 below the top plate is positioned in the rock layer 14, and the cutting edge at the upper end is connected with the top plate;
a pipe jacking pipeline 3 is arranged on the side wall of the inverted well 2 close to the bottom, and a newly-built inspection well 8 is arranged in the center of the bottom;
a newly-built precast concrete inspection shaft 9 is arranged at the upper end of the newly-built inspection well 8, and the newly-built precast concrete inspection shaft 9 is connected with the ground;
the upper end of the newly-built precast concrete inspection pit shaft 9 is provided with a concrete well ring 10, a cast iron well cover and a support 11;
the newly-built inspection well 8 and the newly-built precast concrete inspection shaft 9 are both cast in place by adopting a concrete cast-in-place mode, two layers are sprayed on the upstream surfaces of the periphery of the inner side wall, and the total impervious grade requirement is not less than that of the water-based permeable concrete protective agent P6;
during construction, the inverted well 2 serves as a structural support for building the pipe-jacking pipeline 3, and provides a construction space for building the pipe-jacking pipeline 3.
In practical application, the setting of collar tie 6 can increase the wholeness of brick built wall built-up 5, improves tensile and shear strength of brick built wall built-up 5 simultaneously.
The newly-built precast concrete inspection shaft 9 is used for facilitating the maintenance of a constructor in a well and providing enough vehicle bearing capacity.
In practical application, the inspection shaft with the height less than 4m adopts a concrete block type shaft, and the inspection shaft with the height more than or equal to 4m adopts a reinforced concrete shaft.
In some embodiments, the open caisson body 1, the inverted hanging well 2 and the ring beam 6 are made of reinforced concrete materials.
In some embodiments, the internal diameter of the caisson body 1 is from 6000mm to 8000 mm;
the inner diameter of the inverted well 2 is 4500mm to 7000 mm;
the diameter of the pipe jacking pipeline 3 is 800mm to 1600 mm.
In some embodiments, a plurality of drain pipes 7 are arranged around the side wall between the brick-laid wall-hanging wall 5 and the ring beam 6.
In some embodiments, each drain pipe 7 is a PVC pipe with a diameter of 50 mm;
the distance between every two adjacent water discharge pipes 7 is 2 m.
In some embodiments, the pipe jacking pipeline 3 is a reinforced concrete pipe or a steel pipe, and is constructed by using a rock pipe jacking machine.
In some embodiments, the connecting surface of the inverted well 2 and the top plate and the connecting surface of the top plate and the blade are provided with a plurality of water-swelling rubber water stop strips 4 around the side wall.
In practical application, each water-swelling rubber water stop strip 4 is prevented from being polluted by water or other media in the process of adhering and installing.
In some embodiments, a water stop strip placing groove is reserved in the concrete pouring process at each position where the water-swelling rubber water stop strip 4 is arranged, corresponding to the inverted well 2 and the open caisson main body 1.
In some embodiments, the bricked wall built 5 is constructed using MU15 non-clay solid bricks and M10 cement mortar.
In some embodiments, the ring beam 6 is provided with a steel pipe rail 12 with a height not less than 1.2m at the entrance position on the ground.
In practical application, the steel pipe railings 12 not less than 1.2m can play a role of safety containment, and people or objects can be prevented from falling.
In practical applications, the soil layer 13 includes artificial filling, silt, clay, and sand.
The above definition of the soil layer 13 is a technique commonly used in the art and is described in the building foundation design code (GB 50007-2011).
Taking the reconstruction and expansion project of a sewage pipe network in a certain city as an example, the top pipe supporting layer is positioned in the middle stroke argillaceous siltstone. The method comprises the steps of firstly constructing a sunk well, sinking the sunk well to the top of a weathered argillaceous silty stratum, then breaking rocks by adopting construction modes such as an air pick or a differential loosening controlled blasting method, wherein in the rock breaking process, a rock with the thickness of 600mm is reserved from the inner side wall of a blade foot to the outer edge of an inverted well, a rock pit wall which is chiseled out is used as a support, and C20 concrete with the thickness of 50mm needs to be sprayed on the surface of the stratum. And pouring a reinforced concrete inverted hanging well, wherein the well is used as a pipe jacking working well or a receiving well, and the wall thickness of the inverted hanging well is 350 mm. And finally, pipe jacking construction is carried out, a rock pipe jacking machine is adopted for pipe jacking, after the pipe jacking construction is finished, a newly-built inspection well 8 is constructed, a foundation pit is backfilled, and the pavement is restored.
The specific engineering steps are as follows:
the method comprises the following steps: first, the position and size of the open caisson body 1 are geophysical ascertained, and it is confirmed whether there is a pipeline under the construction area. If the existing pipeline exists, the pipeline can be constructed after being moved. Arranging a steel pipe railing 12 around the open caisson main body 1;
step two: and (3) constructing the open caisson main body 1, and constructing a brick-built inverted wall built-up wall 5, a ring beam 6 and a drain pipe 7 after the open caisson sinks to the top of the rock stratum. Then, rock is broken by adopting construction modes such as an air pick or a differential loosening controlled blasting method, and the like, and in the rock breaking process, rock with the thickness of 60cm to 80cm is reserved from the inner side wall of the blade foot to the outer edge of the inverted well, so that the sunk well is prevented from inclining when the rock is broken;
step three: the wall of a rock pit which is dug out is used as a support, C20 concrete with the thickness of 50mm needs to be sprayed on the surface of a rock stratum, and meanwhile, a water-swelling rubber water stop 4 is arranged between the blade foot and the inverted well 2. Pouring an inverted well 2 by taking the rock stratum after the concrete is sprayed as an outer template, wherein the wall thickness of the inverted well is 250 mm-300 mm;
step four: and (4) performing pipe jacking operation in the well, and jacking or receiving the pipe jacking pipeline 3. After the pipe jacking operation is finished, pouring a newly-built inspection well 8, filling the gap between the pipe jacking pipeline 3 and the newly-built inspection well 8 by adopting asbestos cement, and sealing the exterior by adopting a two-component polysulfide sealant;
step five: and finally, backfilling a gap between two wells after the construction of the newly-built inspection well 8 is finished, backfilling graded sandstone in a range from the bottom plate of the inverted hanging well to the cover plate of the inspection well by 500mm, wherein the backfilling compaction coefficient is not less than 0.94, and when the backfilling compaction coefficient is within a road range: the backfill materials from 500 to the ground on the inspection well cover plate meet the requirement of the road, and the backfill compaction coefficient is more than or equal to 0.97.
The foregoing has described in detail preferred embodiments of the present invention. It should be understood that numerous modifications and variations can be devised by those skilled in the art in light of the present teachings without departing from the inventive concepts. Therefore, the technical solutions that can be obtained by logical analysis, reasoning or limited experiments based on the prior art according to the concepts of the present invention by those skilled in the art should be within the scope of protection defined by the claims.
Claims (10)
1. The combined open caisson is suitable for rocks and comprises a soil layer (13) and a rock layer (14) from the ground to the bottom in sequence; characterized by comprising a caisson main body (1) with a height covering the soil layer (13);
a brick built-up wall hanging wall (5) and a ring beam (6) are sequentially arranged above the open caisson main body (1), and are communicated with the ground through the brick built-up wall hanging wall (5) and the ring beam (6) which are sequentially connected;
the lower end of the open caisson main body (1) is provided with an inverted hanging well (2);
the top plate of the inverted hanging well (2) is positioned in the open caisson main body (1) and is connected with the lower end of the open caisson main body (1);
the part of the inverted hanging well (2) below the top plate is positioned in the rock stratum (14), and the cutting edge at the upper end is connected with the top plate;
a pipe-jacking pipeline (3) is arranged on the side wall of the inverted well (2) close to the bottom, and a newly-built inspection well (8) is arranged in the center of the bottom;
a newly-built precast concrete inspection shaft (9) is arranged at the upper end of the newly-built inspection well (8), and the newly-built precast concrete inspection shaft (9) is connected with the ground;
the upper end of the newly-built precast concrete inspection shaft (9) is provided with a concrete shaft ring (10), a cast iron well cover and a support (11);
the newly-built inspection well (8) and the newly-built precast concrete inspection shaft (9) are both cast in place by adopting a concrete cast-in-place mode, two layers are sprayed on the upstream surfaces of the periphery of the inner side wall, and the total anti-permeability grade requirement is not less than that of a water-based permeable concrete protective agent P6;
during construction, the inverted hanging well (2) is used as a structural support for building the pipe-jacking pipeline (3) and provides a construction space for building the pipe-jacking pipeline (3).
2. Combined caisson for rock use according to claim 1, wherein the caisson body (1), the inverted hanging well (2) and the ring beams (6) are made of reinforced concrete material.
3. The combined caisson for rock use according to claim 1, wherein the inner diameter of the caisson body (1) is 6000mm to 8000 mm;
the inner diameter of the inverted well (2) is 4500mm to 7000 mm;
the diameter of the pipe jacking pipeline (3) is 800 mm-1600 mm.
4. The modular caisson adapted to rock, according to claim 1, characterised in that several drainage pipes (7) are provided around the side walls between the brick-laid wall (5) and the ring beam (6).
5. Combined open caisson for rock use according to claim 4, wherein each of said drainage pipes (7) is PVC pipe with 50mm diameter;
the distance between every two adjacent drain pipes (7) is 2 m.
6. The combined caisson applicable to rock of claim 1, wherein the pipe-jacking pipes (3) are reinforced concrete pipes or steel pipes, and are constructed by using a rock pipe jacking machine.
7. The combined open caisson applicable to rocks as claimed in claim 1, wherein the connection surface of the inverted well (2) and the top plate and the connection surface of the top plate and the cutting edge are both provided with a plurality of water-swelling rubber water stop strips (4) in the circumferential direction.
8. The combined caisson for rock use according to claim 7, wherein a water stop strip placing groove is reserved in the concrete pouring for each position where the water-swellable rubber water stop strip (4) is arranged on the inverted well (2) and the caisson main body (1).
9. The modular caisson adapted for use in rock, according to claim 1, wherein said wall built by laying bricks (5) is built by using MU15 non-clay solid bricks and M10 cement mortar.
10. The combined open caisson adapted to be used in rock, according to claim 1, wherein the ring beam (6) is provided with a steel pipe railing (12) with height not less than 1.2m at the entrance position of the ground.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202220796500.0U CN217325444U (en) | 2022-04-08 | 2022-04-08 | Combined open caisson suitable for rock |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202220796500.0U CN217325444U (en) | 2022-04-08 | 2022-04-08 | Combined open caisson suitable for rock |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN217325444U true CN217325444U (en) | 2022-08-30 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202220796500.0U Active CN217325444U (en) | 2022-04-08 | 2022-04-08 | Combined open caisson suitable for rock |
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| CN (1) | CN217325444U (en) |
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- 2022-04-08 CN CN202220796500.0U patent/CN217325444U/en active Active
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