CN214363618U - Construction structure of concrete inverted hanging well suitable for mucky soil - Google Patents
Construction structure of concrete inverted hanging well suitable for mucky soil Download PDFInfo
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- CN214363618U CN214363618U CN202120125698.5U CN202120125698U CN214363618U CN 214363618 U CN214363618 U CN 214363618U CN 202120125698 U CN202120125698 U CN 202120125698U CN 214363618 U CN214363618 U CN 214363618U
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Abstract
The utility model discloses a construction structure of a concrete inverted hanging well suitable for mucky soil, which comprises a high-pressure jet grouting pile waterproof curtain and an inverted hanging well main body; the high-pressure jet grouting pile waterproof curtain comprises a plurality of jet grouting piles; the inverted well main body is arranged in the high-pressure jet grouting pile waterproof curtain; arranging a pipeline composite foundation on the side surface of the high-pressure jet grouting pile waterproof curtain corresponding to the area of the newly-connected top pipe pipeline; an inverted well composite foundation is arranged below the inverted well main body; the position of the inverted well main body close to the lower end is respectively connected with the existing pipeline and the pipeline of the new top pipe; a newly-built inspection well is arranged in the middle of the bottom of the main body of the inverted well; the ground above the main body of the inverted well is provided with a construction fence. In construction, firstly constructing a high-pressure jet grouting pile waterproof curtain, and then sequentially constructing an inverted well composite foundation, a pipeline composite foundation and an inverted well main body; and finally, pouring a newly-built inspection well in the main body of the overhead hanging well. The utility model has the advantages of many kinds of applicable pipeline materials, neat and complete applicable pipeline diameters and the like.
Description
Technical Field
The utility model relates to a construction technical field, in particular to construction structures of concrete overhead pit suitable for mucky soil is built to overhead pit.
Background
Along with the progress of urbanization, the scale of cities is rapidly enlarged, the population of urban residents is continuously increased, and the scale of the existing water supply and drainage pipelines in cities and towns cannot meet the requirements of current use. Meanwhile, with the abnormal change of the climate and the increase of extreme weather, waterlogging occurs in the city in the rich season. In view of the above problems, government-related departments begin to rebuild urban water supply and drainage pipe networks on a large scale in recent years. As municipal road pipeline construction in China is still in a mutually crossed and respectively administrative state, existing pipelines below roads are complicated. Because the open caisson construction process can not meet the construction requirements of a water supply and drainage pipe network under complex conditions, and the concrete inverted hanging well has the advantages of simple process, good integrity, convenience in moving and modifying the existing pipeline and the like, the open caisson construction process is widely applied to municipal pipe network modification and expansion engineering.
When the muddy soil is encountered, the city with enlarged scale can often encounter the muddy soil in the reconstruction and extension process of the water supply and drainage pipe network, the interface of the inverted well body and the pipe-jacking pipeline is generally a rigid interface, and if the soil body is not properly treated, the well body and the pipeline can sink unevenly, and cracks are generated at the interface, so that the sewage in the pipeline is leaked.
Aiming at municipal pipe network reconstruction and expansion projects with deep muddy soil and existing complex pipelines under roads, the technical problem which needs to be solved urgently by technical personnel in the field is how to prevent uneven settlement of pipe-jacking pipelines and inverted hanging wells and ensure smooth communication between reconstructed and expanded water supply and drainage pipelines and existing pipelines.
SUMMERY OF THE UTILITY MODEL
In view of the above-mentioned defect of prior art, the utility model provides a construction structures of concrete overhead well suitable for mucky soil, the purpose of realization is that minimum influences the traffic in the work progress, and simple process, the wholeness is good, is fit for the construction of concrete overhead well under the existing complicated pipeline condition of deep mucky soil and road below existence.
In order to realize the purpose, the utility model discloses a construction structure of a concrete inverted hanging well which is suitable for mucky soil; the high-pressure jet grouting pile waterproof curtain comprises a high-pressure jet grouting pile waterproof curtain, an inverted well main body, a pipeline composite foundation, an inverted well composite foundation, an existing pipeline, a newly-connected top pipe pipeline and a construction fence.
The high-pressure jet grouting pile waterproof curtain comprises a plurality of jet grouting piles; the occlusion distance between every two adjacent jet grouting piles is greater than 1/100 of the height of the pile body of the corresponding jet grouting pile;
the inverted well main body is arranged in the high-pressure jet grouting pile waterproof curtain and comprises a plurality of sections of well cores from top to bottom;
the plurality of section well cores comprise an end section well core positioned at the uppermost end of the inverted well main body and a plurality of middle section well cores positioned below the end section well core and sequentially connected with each other;
the inner hole of each middle section well core is in a frustum shape, the diameter of the upper end of the middle section well core is smaller than that of the lower end of the middle section well core, and an assembly boss is arranged on the upper end face of each middle section well core;
the assembling boss of each middle section well core is matched with the lower end inner hole of the end section well core or the middle section well core which is adjacent to the upper part;
the pipeline composite foundation is arranged in the area, corresponding to the newly connected top pipe, of the side face of the high-pressure jet grouting pile waterproof curtain; each pipeline composite foundation comprises a plurality of pipeline foundation piles;
the inverted well composite foundation is arranged below the inverted well main body and used for reinforcing a pipe-jacking foundation; the inverted well composite foundation comprises a plurality of inverted well foundation piles;
the position of the inverted well main body close to the lower end is respectively connected with the existing pipeline and the new top pipe pipeline;
a newly-built inspection well is arranged in the middle of the bottom in the inverted well main body;
the ground above the inverted well main body is provided with the construction fence.
Preferably, the waterproof curtain of the high-pressure jet grouting pile is poured by ordinary silicate cement grout with the strength grade of 42.5.
Preferably, each pipeline composite foundation comprises a plurality of foundation piles for the inverted well;
the length and the distance of the pile bodies of the foundation piles of each inverted hanging well are determined according to the technical Specification for treating the building foundation (JGJ 79-2012);
the bearing capacity of the pipeline composite foundation is greater than or equal to 100 KPa.
Preferably, the longitudinal reinforcement range of the soil body of the composite foundation of the inverted hanging well is from 2.0m above the pipeline of the new top-connected pipe to 3.0m below the pipeline.
Preferably, the pipe of the existing pipeline is a reinforced concrete pipe, a steel pipe, a polyethylene spiral corrugated pipe or a steel cylinder concrete pipe, and the pipe diameter is 500mm to 3000 mm.
Preferably, the pipe of the new top pipe connecting pipeline is a concrete pipe or a steel pipe, and the pipe diameter is suitable for the diameter of 800mm to 3000 mm.
Preferably, the existing pipeline and the new top pipe connecting pipeline are provided with outer sleeve steel pipes at the positions penetrating through the well wall of the inverted well main body;
the pipe material of the outer sleeved steel pipe is stainless steel, glass fiber reinforced plastic or aluminum alloy.
Preferably, the height of the construction fence is more than 1.2 m.
The utility model has the advantages that:
the utility model is suitable for the municipal pipe network reconstruction and expansion engineering with deep mucky soil and existing complex pipelines under roads; the utility model can smoothly connect the newly-built water supply and drainage pipeline with the existing pipeline on the premise of not damaging the existing pipeline; the utility model has the advantages of many kinds of applicable pipeline materials, neat and complete applicable pipeline diameters and the like.
The utility model discloses during well high pressure jet grouting pile stagnant water curtain can prevent that groundwater from permeating overhead well, ensured constructor's personal safety, avoided simultaneously because the construction precipitation leads to the construction influence regional building sink or the slope of building.
The concrete inverted hanging well has high bearing capacity and good integrity, and can effectively protect and move the existing pipeline below the road in the construction process; when the concrete overhead hoist is small in size, the pouring of the internal inspection well can utilize the pre-support well wall of the concrete overhead hoist to serve as an outer template, so that the cost is saved, and meanwhile, the rigidity and the bearing capacity of the inspection well can be effectively increased.
The utility model discloses well overhead well and pipeline composite foundation can improve open caisson and pipeline below soil body bearing capacity, eliminate the inhomogeneous settlement between pipeline and the overhead well to avoid leading to sewage to leak in the pipeline because of the pipeline produces the crack.
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 schematic plan view of an embodiment of the present invention.
Fig. 2 shows a schematic cross-sectional view of AA in fig. 1 according to the present invention.
Fig. 3 shows a schematic diagram of a middle section well core according to an embodiment of the present invention.
Fig. 4 shows a schematic layout of the reinforcing bars of the middle section of the well core in an embodiment of the present invention.
Fig. 5 shows a schematic layout of the reinforcement bars of the upper-end segment of the well core in an embodiment of the present invention.
Detailed Description
Example 1
As shown in fig. 1 to 5, a construction structure of a concrete inverted well suitable for mucky soil; the high-pressure jet grouting pile waterproof curtain comprises a high-pressure jet grouting pile waterproof curtain 1, an inverted well main body 2, a pipeline composite foundation 3, an inverted well composite foundation 4, an existing pipeline 5, a newly-connected top pipe pipeline 6 and a construction fence 9;
the high-pressure jet grouting pile waterproof curtain 1 comprises a plurality of jet grouting piles; the occlusion distance between every two adjacent jet grouting piles is greater than 1/100 of the height of the pile body of the corresponding jet grouting pile;
the inverted well main body 2 is arranged in the high-pressure jet grouting pile waterproof curtain 1 and comprises a plurality of sections of well cores from top to bottom;
the plurality of sections of well cores comprise end section well cores positioned at the uppermost end of the inverted well main body 2 and a plurality of middle section well cores positioned below the end section well cores and connected in sequence;
the inner hole of each middle section well core is in a frustum shape, the diameter of the upper end of the inner hole is smaller than that of the lower end of the inner hole, and an assembly boss is arranged on the upper end face of each middle section well core;
the assembling boss of each middle section well core is matched with the lower end inner hole of the adjacent end section well core or the middle section well core above the assembling boss;
a pipeline composite foundation 3 is arranged on the side surface of the high-pressure jet grouting pile waterproof curtain 1 corresponding to the area of the newly-connected top pipe pipeline 6; each pipeline composite foundation 3 comprises a plurality of pipeline foundation piles;
an inverted well composite foundation 4 is arranged below the inverted well main body 2 and used for reinforcing a pipe jacking foundation; the inverted well composite foundation 4 comprises a plurality of inverted well foundation piles;
the position of the inverted well main body 2 close to the lower end is respectively connected with an existing pipeline 5 and a new top pipe connecting pipeline 6;
a newly-built inspection well 8 is arranged in the middle of the bottom of the inverted well main body 2;
the ground above the main body 2 of the inverted well is provided with a construction fence 9.
The principle of the utility model is as follows:
the inner edge of the high-pressure jet grouting pile waterproof curtain 1 can be used as an outer template of the concrete inverted well at the same time, and the well wall of the inverted well main body 2 is convenient to pour.
The assembly boss on the upper end face of each middle section well core can increase the shearing resistance of the joint of the adjacent sections of well cores, increase the rigidity of the main body 2 of the inverted well and improve the water permeability resistance of the inverted well.
In some embodiments, the high pressure jet grouting pile waterproof curtain 1 is cast with ordinary portland cement grout with a strength grade of 42.5.
In certain embodiments, each pipe composite foundation 3 comprises a number of inverted well foundation piles;
the length and the distance of pile bodies of the foundation piles of each inverted hanging well are determined according to the technical Specification for treating the building foundation (JGJ 79-2012);
the bearing capacity of the pipeline composite foundation 3 is more than or equal to 100 KPa.
The structure can ensure the stability of the foundation of the inverted well and ensure that the concrete inverted well does not incline or sink unevenly.
In some embodiments, the longitudinal reinforcement of the soil body of the composite foundation 4 for the inverted well ranges from 2.0m above the pipeline of the newly jacked pipe 6 to 3.0m below the pipeline.
The structure can ensure the stability of the pipe jacking foundation and ensure that the pipe jacking pipeline cannot sink unevenly and crack.
In some embodiments, the pipe of the existing pipeline 5 is a reinforced concrete pipe, a steel pipe, a polyethylene PE spiral corrugated pipe or a steel cylinder concrete pipe, and the pipe diameter is 500mm to 3000 mm.
In some embodiments, the pipe material of the new pipe jacking pipeline 6 is a concrete pipe or a steel pipe, and the pipe diameter is suitable for the diameter of 800mm to 3000 mm.
In some embodiments, the existing pipeline 5 and the new top-connected pipe pipeline 6 are provided with outer-sleeved steel pipes 7 at positions penetrating through the wall of the inverted well main body 2;
the pipe material of the outer sleeved steel pipe 7 is stainless steel, glass fiber reinforced plastic or aluminum alloy.
The outer sleeved steel pipe 7 is used for protecting the existing pipeline 5 and the new top pipe connecting pipeline 6 from being damaged in the construction process.
In some embodiments, the construction fence 9 has a height above 1.2 m.
The construction fence 9 can play a role of enclosure in construction, and prevent people or objects from falling.
The utility model discloses still provide the construction method of the concrete overhead well suitable for mucky soil, the step is as follows:
step 1, carrying out water supply, electrification, access and field leveling on a field to meet construction requirements;
step 2.1, leveling the field;
2.2, placing the machine in place, and injecting a jet pipe to the position 5m below the bottom elevation of the inverted well main body 2;
step 2.3, injecting the slurry to the elevation of the rotary jet grouting pile;
step 2.4, tube drawing and flushing;
step 2.5, repeating the step 2.2 to the step 2.5 until all the jet grouting piles are completed;
step 3.1, constructing an inverted well composite foundation 4 in the area within the range of the high-pressure jet grouting pile waterproof curtain 1, and specifically comprising the following steps:
step 3.2.1, positioning the machine tool, and injecting the injection pipe to the designed pile bottom elevation;
step 3.2.2, injecting and grouting to 0.5m above the bottom elevation;
step 3.2.3, tube drawing and flushing;
step 3.2, constructing a pipeline composite foundation 3 within the range of 5m outside the high-pressure jet grouting pile waterproof curtain 1, wherein the longitudinal reinforcement range of a soil body is from 2.0m above a pipeline of the newly-jacked pipeline 6 to 3.0m below the pipeline, and the concrete steps are as follows:
step 3.3.1, positioning the machine tool, and injecting the injection pipe to the designed pile bottom elevation;
3.3.2, injecting the slurry to a position 0.5m above the newly connected top pipe pipeline 6;
step 3.3.3, tube drawing and flushing;
and 5, after the inverted well main body 2 and the existing pipeline 5 are finished, pouring a newly-built inspection well 8 in the inverted well main body 2.
In practical application, the service life of the newly-built inspection well 8 is designed to be 50 years, and when the size of the inverted well is large and the requirement on the volume of the inspection well is not high, the inspection well can be normally poured inside the inverted well;
when the size of the inverted well is small and the requirement on the size of the inspection well is high, the well wall of the inverted well can be used as an outer template to pour the inner inspection well.
In the construction of the inspection well, the existing pipeline 5 is still in operation, so the existing pipeline 5 is carefully protected in the construction, the existing pipeline 5 is prevented from being damaged in the construction, and after the construction of the newly-built inspection well 8 is finished, the existing pipeline 5 is broken, the wall of the damaged pipeline is removed, and the construction is finally finished.
In some embodiments, in step 4, the specific steps of constructing the inverted well body 2 are as follows:
step 4.1, cleaning a construction site and excavating to 1m below the ground;
step 4.2, positioning a well body sideline;
4.3, excavating earthwork of the well core of the end section;
4.4, pouring a top ring beam of the main body 2 of the inverted hanging well;
4.5, secondarily measuring elevation and a cross axis of a well position on the well wall of the main body 2 of the inverted well, and installing facilities for drainage, illumination, ventilation and the like;
step 4.6, excavating middle section well core earthwork in a segmented jumping excavation mode;
4.7, pouring middle section well core concrete of the inverted well main body 2;
4.8, repeating the steps 4.5 to 4.7 until all the middle section well cores are completed;
step 4.9, arranging an outer sleeve steel pipe 7;
step 4.10, sealing the bottom of plain concrete;
and 4.11, jacking the pipe into the inverted well main body 2 in a mechanical or manual mode.
Example 2
Taking an initial rainwater storage project of a double-bridge river area in a certain city as an example, an inverted hanging well is a four-way well, a current pipeline is arranged in the well, firstly, a high-pressure jet grouting pile water-stop curtain is constructed, 600mm double-row high-pressure jet grouting piles are adopted as the water-stop curtain, and when the current pipeline is encountered, the high-pressure jet grouting piles are driven to a position 0.5m above the current pipeline from 1m below the ground under the condition that the height of the pipeline is determined; constructing a composite foundation in the waterproof curtain range and a pipeline transverse and longitudinal composite foundation outside the waterproof curtain range; constructing an inverted hanging well, cleaning a construction site and excavating to 1m below the ground, positioning a side line of a well body, excavating a first section of well core earthwork, pouring an inverted hanging well top ring beam, measuring elevation and a well position cross axis on a well wall for the second time, installing facilities such as drainage, illumination, ventilation and the like, excavating a second section of well core earthwork (sectional jump excavation), pouring a second section of concrete inverted hanging well protecting wall, repeating all the working procedures of the second section until the well bottom elevation, sealing bottom with plain concrete, and jacking a mechanical (manual) jacking pipe into the inverted hanging well; and finally constructing an inspection well.
Finally, it should be noted that the above construction method includes a plurality of construction methods, and can also be applied to a plurality of complex situations, such as: the device is suitable for the concrete inverted well with deep silt; the method is suitable for the concrete inverted hanging well of deep plain fill and the like.
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 a person skilled in the art through logic analysis, reasoning or limited experiments based on the prior art according to the concepts of the present invention should be within the scope of protection defined by the claims.
Claims (8)
1. The construction structure of the concrete inverted hanging well suitable for the mucky soil is characterized by comprising a high-pressure jet grouting pile waterproof curtain (1), an inverted hanging well main body (2), a pipeline composite foundation (3), an inverted hanging well composite foundation (4), an existing pipeline (5), a newly-connected top pipe pipeline (6) and a construction fence (9);
the high-pressure jet grouting pile waterproof curtain (1) comprises a plurality of jet grouting piles; the occlusion distance between every two adjacent jet grouting piles is greater than 1/100 of the height of the pile body of the corresponding jet grouting pile;
the inverted well main body (2) is arranged in the high-pressure jet grouting pile waterproof curtain (1) and comprises a plurality of sections of well cores from top to bottom;
the multiple segmental well cores comprise end segmental well cores positioned at the uppermost end of the inverted well main body (2) and multiple middle segmental well cores positioned below the end segmental well cores and sequentially connected with each other;
the inner hole of each middle section well core is in a frustum shape, the diameter of the upper end of the middle section well core is smaller than that of the lower end of the middle section well core, and an assembly boss is arranged on the upper end face of each middle section well core;
the assembling boss of each middle section well core is matched with the lower end inner hole of the end section well core or the middle section well core which is adjacent to the upper part;
the pipeline composite foundation (3) is arranged on the side surface of the high-pressure jet grouting pile waterproof curtain (1) corresponding to the area of the newly-connected top pipe pipeline (6); each pipeline composite foundation (3) comprises a plurality of pipeline foundation piles;
the inverted well composite foundation (4) is arranged below the inverted well main body (2) and used for reinforcing a pipe-jacking foundation; the inverted well composite foundation (4) comprises a plurality of inverted well foundation piles;
the position of the inverted well main body (2) close to the lower end is respectively connected with the existing pipeline (5) and the new top pipe connecting pipeline (6);
a newly-built inspection well (8) is arranged in the middle of the bottom of the inverted well main body (2);
the ground above the inverted well main body (2) is provided with the construction fence (9).
2. The construction structure of the concrete inverted hanging well for the mucky soil as claimed in claim 1, wherein the high-pressure jet grouting pile waterproof curtain (1) is cast by ordinary silicate cement grout with a strength grade of 42.5.
3. The construction structure of a concrete inverted hanging well for muddy soil according to claim 1, wherein each of said pipe composite foundations (3) comprises a plurality of inverted hanging well foundation piles;
the length and the distance of the pile bodies of the foundation piles of each inverted hanging well are determined according to the technical Specification for treating the building foundation (JGJ 79-2012);
the bearing capacity of the pipeline composite foundation (3) is more than or equal to 100 KPa.
4. The construction structure of the concrete inverted hanging well suitable for the mucky soil as claimed in claim 1, wherein the longitudinal reinforcement of the soil body of the inverted hanging well composite foundation (4) ranges from 2.0m above the pipeline of the new pipe-jacking pipeline (6) to 3.0m below the pipeline.
5. The construction structure of the concrete invert well for muddy soil according to claim 1, wherein the pipe material of the existing piping (5) is a reinforced concrete pipe, a steel pipe, a Polyethylene (PE) helical bellows or a steel cylinder concrete pipe having a pipe diameter of 500mm to 3000 mm.
6. The construction structure of a concrete invert well for muddy soil according to claim 1, characterized in that the pipe material of the new pipe-jacking pipeline (6) is a concrete pipe or a steel pipe, and the pipe diameter is suitable for the diameter of 800mm to 3000 mm.
7. The construction structure of the concrete inverted hanging well suitable for the mucky soil according to the claim 1, wherein the existing pipeline (5) and the new top pipe pipeline (6) are provided with outer sleeved steel pipes (7) at the position of the well wall penetrating through the inverted hanging well main body (2);
the pipe material of the outer sleeved steel pipe (7) is stainless steel, glass fiber reinforced plastic or aluminum alloy.
8. The construction structure of a concrete inverted well for muddy soil as claimed in claim 1, wherein the height of said construction fence (9) is 1.2m or more.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120125698.5U CN214363618U (en) | 2021-01-18 | 2021-01-18 | Construction structure of concrete inverted hanging well suitable for mucky soil |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202120125698.5U CN214363618U (en) | 2021-01-18 | 2021-01-18 | Construction structure of concrete inverted hanging well suitable for mucky soil |
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