CN111101542A - Assembly type recyclable pipe jacking working well and construction process thereof - Google Patents
Assembly type recyclable pipe jacking working well and construction process thereof Download PDFInfo
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- CN111101542A CN111101542A CN201911356749.9A CN201911356749A CN111101542A CN 111101542 A CN111101542 A CN 111101542A CN 201911356749 A CN201911356749 A CN 201911356749A CN 111101542 A CN111101542 A CN 111101542A
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- side wall
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D29/00—Independent underground or underwater structures; Retaining walls
- E02D29/12—Manhole shafts; Other inspection or access chambers; Accessories therefor
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Abstract
The invention provides an assembled recoverable pipe jacking working well which comprises a circular working well main body, wherein the circular working well main body comprises a concrete cutting edge component and a plurality of steel side wall components stacked on the concrete cutting edge component layer by layer from bottom to top, the steel side wall components are formed by splicing a plurality of steel side wall units along the circumferential direction through bolts, the concrete cutting edge component is formed by splicing a plurality of concrete cutting edge units along the circumferential direction through door-shaped ribs, and the construction process is that the circular working well main body is assembled from bottom to top. Compared with the prior art, the invention has the beneficial effects that: the assembly degree is high; the unit adaptability is high, the hole opening position of the jacking pipe in the well is flexible, the connection mode is simple, the soil body supporting effect is good, and the safety is easier to guarantee; the resource utilization rate is high, and all the steel side wall units can be withdrawn after the construction is finished; after the construction is temporarily recovered, the soil in the working area is recovered as much as possible, and the underground environment is protected.
Description
Technical Field
The invention relates to the technical field of pipe-jacking working well construction, in particular to an assembled recyclable pipe-jacking working well and a construction process thereof.
Background
At present, in urban municipal engineering, because of environmental conditions, trenchless pipe jacking construction operation is mostly adopted, and commonly used pipe jacking working wells are constructed by a reverse arch wall method, a reinforced concrete open caisson cast in situ layer by layer, a simple steel cylinder, a steel plate (profile steel) pile enclosure structure and the like, and the concrete methods are respectively as follows:
firstly, a reverse arching wall method: the technical principle is that a supporting structure is constructed layer by layer from top to bottom, namely, a layer of earthwork is excavated from top to bottom along an excavation line of a working well, then, the side wall of an excavation surface is used as an outer template, reinforcing steel bars are bound, an inner template is erected, and concrete is poured. From this successive layer circulation construction constitutes the horizontal bearing system of contrary doing, the advantage: the construction technology has small difficulty and less investment compared with the reinforced concrete open caisson. The disadvantages are as follows: 1. the reinforcing steel bars and the supporting templates are manufactured on site, and the labor time investment is large; 2. after the concrete reaches a certain strength, an enclosure structure can be formed to meet the requirement of lower-layer construction, and the construction period is longer; 3. the construction quality of the temporary structure is difficult to control; 4. after the construction is finished, the supporting structure is buried underground as a permanent concrete structure, and resources are wasted.
Secondly, sinking the well by reinforced concrete: the method comprises the steps of manufacturing well rings layer by layer at a well position, then digging soil in a well, overcoming the frictional resistance of a well wall by means of self gravity, sinking to a designed elevation, and then sealing the bottom by concrete to meet the requirement of pushing operation. The advantages are that: the enclosure structure has better strength, rigidity and stability. And the construction is safe. The disadvantages are as follows: 1. the manufacturing period of the reinforced concrete structure manufactured on site is long; 2. the construction is complex, the number of the templates is large, and the construction cost is high; 3. the concrete is easy to crack when the concrete is unevenly sunk, so that the local damage of the structure is caused; 4. secondary hole opening is needed for the pipe jacking front working well; 5. the pipe wall body structure is inconvenient for subsequent underground construction at the position.
Thirdly, simple steel cylinder: the method is applied rarely, generally, the soil stability is good, and the method is occasionally applied when the well depth is small, and the method is that a steel plate is rolled into a cylinder, the cylinder is transported to the site section by section, the self-stability performance of the soil body is utilized to quickly excavate to a designed elevation, then the steel cylinder is hoisted section by section, and the steel cylinder is welded and heightened section by section. The method has the advantages that the construction conditions are relatively crude, and the steel cylinder has poor welding quality, poor cylinder body ring rigidity and large construction limitation. Before jacking, the steel cylinder needs secondary cutting and punching.
Fourthly, the steel plate (section steel) pile enclosure structure: the method is that a supporting structure in foundation pit engineering is used as a working well of a jacking pipe, and the method does not belong to a typical jacking pipe construction method, because the jacking pipe needs to be opened, and a steel sheet pile enclosure structure needs to be in a closed state, the two are contradictory, during opening, treatment is often not standard, a soil body may be in a non-supporting state, and safety risks exist.
In the method, the structure, the construction process and the dismantling process of the open caisson are considered and improved constructively to make up for or avoid the defects.
Disclosure of Invention
In order to solve the problems, the invention discloses an assembled recoverable push pipe working well and a construction process thereof.
In order to achieve the above purpose, the invention provides the following technical scheme:
the utility model provides a recoverable push pipe working well of assembled which characterized in that: the concrete cutting edge assembly is formed by splicing a plurality of steel side wall units along the circumferential direction through bolts, the steel side wall units are of circular arc-shaped plate-shaped structures and are composed of a top plate, a bottom plate, side plates, inner and outer back plates and a stiff framework, connecting bolt holes are uniformly distributed in the top plate, the bottom plate and the side plates of each steel side wall unit, anchoring piece inserting holes which are the same in number and correspond in position are respectively formed in the inner and outer back plates along the radial direction of the inner and outer back plates, the concrete cutting edge assembly is formed by splicing a plurality of concrete cutting edge units along the circumferential direction through door-shaped ribs, door-shaped rib holes are symmetrically formed in the two sides of the upper and lower surfaces of the concrete cutting edge assembly, and positioning pin holes are uniformly distributed in the top surface.
Furthermore, the plane external diameter of circular working well main part is 6600mm, and the internal diameter is 5800mm, and vertical height 1500 mm.
Further, the central angle of the steel side wall unit is 30 degrees, the height is 1500mm, and the top and bottom width is 400 mm.
Furthermore, the central angle of the concrete edge foot unit is 30 degrees, the height is 1100mm, the top width is 430mm, the bottom edge foot width is 180mm, and the gradual change height is 700 mm.
Further, the side wall unit further comprises an auxiliary component, wherein the auxiliary component comprises positioning pins (or expansion bolts) and anchoring reinforcing steel bars, the bolt holes in the upper end face and the lower end face of the side wall unit are arranged in an annular array, and the central angle of two adjacent rows of bolt holes is 10 degrees.
Further, the construction process of the assembled recoverable push pipe working well comprises the following specific steps of assembling from bottom to top: well position determination, cutting edge groove lofting, cutting edge groove excavation, concrete cutting edge unit groove assembly, pipe jacking position determination, steel side wall unit installation at a hole opening position, assembly of the first layer of residual steel side wall unit, excavation of the soil well body sinking in the well, assembly of each layer of steel side wall unit, circular excavation to a designed elevation, bottom sealing, pipe jacking position steel side wall unit disassembly, pipe jacking operation, backfill and recovery of each steel side wall unit from bottom to top.
Compared with the prior art, the invention has the beneficial effects that:
1. the assembly degree is obviously promoted: the construction period of the conventional working well, whether a reverse construction method or a concrete open caisson, is 15 d-30 d, but the time for assembling the components is greatly shortened and can be finished within 7 d-15 d;
2. the unit adaptability degree is high, the connection mode is simple, the soil body supporting effect is good, and the safety is easier to guarantee;
3. the 10-degree bolt holes are arranged in an array mode, so that the units are easy to adjust when being installed, and the hole opening positions of the jacking pipes in the well are flexible;
4. the resource utilization rate is high, and all the steel side wall units can be withdrawn after the construction is finished;
5. after the construction is temporarily recovered, the soil in the working area is recovered as much as possible, and the underground environment is protected.
Drawings
FIG. 1 is a plan view of a fabricated recoverable push pipe work well of the present invention.
Fig. 2 is a schematic inside view of a steel side wall unit.
Fig. 3 is a side elevational view of a steel side wall unit.
Fig. 4 is a plan view of a steel side wall unit.
Fig. 5 is a schematic view of a concrete blade foot unit.
FIG. 6 is a plan view of a concrete blade foot unit
FIG. 7 is a schematic sectional view taken along line I-I in FIG. 6.
FIG. 8 is a schematic sectional view of II-II in FIG. 6.
Fig. 9 is a schematic view of the concrete blade foot unit assembly.
Figure 10 is a schematic view of the assembly of the steel side wall unit and the concrete blade foot unit.
FIG. 11 is a schematic view showing a process of disassembling any steel sidewall unit in the assembled recoverable push pipe working well according to the present invention.
FIG. 12 is a schematic diagram of a first step in a disassembly process of any steel sidewall unit in the fabricated recoverable push pipe working well according to the present invention. FIG. 13 is a schematic diagram of a second step in the disassembly process of any steel sidewall unit in the assembled recoverable push pipe working well according to the present invention. FIG. 14 is a schematic diagram of a third step in the disassembly process of any steel sidewall unit in the fabricated recoverable push pipe working well according to the invention. FIG. 15 is a schematic diagram of the fourth step in the disassembly process of any steel sidewall unit in the assembled recoverable push pipe working well according to the invention. FIG. 16 is a schematic diagram of the fifth step in the disassembly process of any steel sidewall unit in the assembled recoverable push pipe working well according to the invention. FIG. 17 is a schematic diagram of a sixth step in the disassembly process of any steel sidewall unit in the assembled recoverable push pipe working well of the present invention. FIG. 18 is a three-dimensional schematic view of the disassembly of any steel sidewall unit in the fabricated recoverable push pipe working well of the present invention.
List of reference numerals:
1-steel side wall unit, 2-concrete edge foot unit, 3-connecting bolt hole, 4-stiff skeleton, 5-anchoring piece inserting hole and 6-positioning
The steel plate comprises a pin hole, 7-door-shaped ribs, 8-door-shaped rib holes, 9-positioning pins, 10-anchoring steel bars and 11-tongue-and-groove.
Detailed Description
The present invention will be further illustrated with reference to the accompanying drawings and specific embodiments, which are to be understood as merely illustrative of the invention and not as limiting the scope of the invention. It should be noted that the terms "front," "back," "left," "right," "upper" and "lower" used in the following description refer to directions in the drawings, and the terms "inner" and "outer" refer to directions toward and away from, respectively, the geometric center of a particular component.
As shown in the figure, the assembly type recoverable pipe jacking working well comprises a circular working well main body, wherein the circular working well main body comprises a concrete cutting edge component and a plurality of steel side wall components stacked on the concrete cutting edge component layer by layer from bottom to top, the steel side wall components are formed by splicing a plurality of steel side wall units 1 along the circumferential direction through bolts, the steel side wall units are of arc-shaped plate structures, the concrete cutting edge assembly is formed by splicing a plurality of concrete cutting edge units 2 along the circumferential direction through door-shaped ribs 7, door-shaped rib holes 8 are symmetrically arranged on two sides of the upper surface and the lower surface of the concrete cutting edge unit, and positioning pin holes 6 are uniformly distributed on the top surface.
In this embodiment, the outer diameter of the plane of the circular working well body is 6600mm, the inner diameter is 5800mm, and the vertical height is 1500 mm.
In this example, the steel side wall unit 1 has a central angle of 30 °, a height of 1500mm, and a top-bottom width of 400 mm.
In this embodiment, the central angle of the concrete blade unit 2 is 30 °, the height is 1100mm, the top width is 430mm, the bottom blade width is 180mm, and the gradual change height is 700 mm.
In this embodiment, there are also included accessory components including expansion bolts, dowel pins 9 and anchoring bars 10.
The invention relates to a construction process of an assembled recoverable pipe jacking working well, which comprises the following steps of: well position determination, cutting edge groove lofting, cutting edge groove excavation, concrete cutting edge unit groove assembly, pipe jacking position determination, steel side wall unit installation at a hole opening, assembly of a layer of residual steel side wall unit, excavation of an underground soil well body subsidence, assembly of each layer of steel side wall unit, circular excavation to a designed elevation, bottom sealing, pipe jacking steel side wall unit disassembly, pipe jacking operation, backfill and recovery of each steel side wall unit from bottom to top.
In the assembly process, the unit size fully considers the commonly used diameter range (800mm, 1000mm and 1200mm) of the jacking pipe, the arrangement position of the well wall unit can be adjusted in advance to adapt to the position of the jacking pipe during installation, and the minimum radial adjustment angle is 10 degrees.
As shown in FIG. 11, during the disassembly (recovery), after the working well sinks to reach the designed elevation and bottom sealing, a steel side wall unit can be disassembled according to the pipe position to serve as a jacking pipe inlet, the disassembly process is that the steel side wall unit is disassembled after single-row integral lifting, the soil body is ensured to be stable, at the moment, radial pressure is applied to the pipe wall by soil pressure to cause the butt end surfaces of the steel side wall unit to be extruded mutually and difficult to lift, in order to reduce the lifting resistance caused by extrusion, anchoring reinforcing steel bars can be inserted into the adjacent steel side wall units through anchoring holes, the steel side wall units on two sides are fixed by the soil body behind the pipe wall, and the steel side wall units can be lifted smoothly by matching with wedge-shaped steel sheets and lubricating measures on the side surfaces of the steel side wall units. It should be noted that: 1. the dismounting process is suitable for the pipe jacking position before pipe jacking operation, so that when the steel side wall unit is mounted, the dismounting position needs to be determined, and further the mounting position of the unit is determined; 2. and after the pipeline pushing operation is finished, all the steel side wall units need to be recycled, and after the fifth step is finished, the steel side wall units are reversely recycled from bottom to top in the layered backfilling process by using a 'jumping and pumping' method of the partition unit.
The technical means disclosed in the invention scheme are not limited to the technical means disclosed in the above embodiments, but also include the technical scheme formed by any combination of the above technical features. It should be noted that those skilled in the art can make various improvements and modifications without departing from the principle of the present invention, and such improvements and modifications are also considered to be within the scope of the present invention.
Claims (7)
1. The utility model provides a recoverable push pipe working well of assembled which characterized in that: the concrete cutting edge assembly is formed by splicing a plurality of steel side wall units along the circumferential direction through bolts, the steel side wall units are of circular arc-shaped plate-shaped structures and are composed of a top plate, a bottom plate, side plates, inner and outer back plates and a stiff framework, connecting bolt holes are uniformly distributed in the top plate, the bottom plate and the side plates of each steel side wall unit, anchoring piece inserting holes which are the same in number and correspond in position are respectively formed in the inner and outer back plates along the radial direction of the inner and outer back plates, the concrete cutting edge assembly is formed by splicing a plurality of concrete cutting edge units along the circumferential direction through door-shaped ribs, door-shaped rib holes are symmetrically formed in the two sides of the upper and lower surfaces of the concrete cutting edge assembly, and positioning pin holes are uniformly distributed in the top surface.
2. The fabricated retrievable pipe-jacking working well of claim 1, wherein: the plane external diameter of circular working well main part is 6600mm, and the internal diameter is 5800mm, and vertical height 1500 mm.
3. The fabricated retrievable pipe-jacking working well of claim 1, wherein: the central angle of the steel side wall unit is 30 degrees, the height is 1500mm, and the top and bottom width is 400 mm.
4. The fabricated retrievable pipe-jacking working well of claim 1, wherein: the central angle of the concrete edge foot unit is 30 degrees, the height is 1100mm, the top width is 430mm, the bottom edge foot width is 180mm, and the gradual change height is 700 mm.
5. The fabricated retrievable pipe-jacking working well of claim 1, wherein: the auxiliary member comprises an expansion bolt, a positioning pin and an anchoring steel bar.
6. The construction process of the assembled recoverable pipe-jacking working well according to claim 1, wherein the construction process comprises the following steps: and assembling from bottom to top.
7. The construction process of the assembled recoverable pipe-jacking working well according to claim 6, which comprises the following steps: well position determination, cutting edge groove lofting, cutting edge groove excavation, concrete cutting edge unit groove assembly, pipe jacking position determination, steel side wall unit installation at a hole opening, assembly of a layer of residual steel side wall unit, excavation of an underground soil well body subsidence, assembly of each layer of steel side wall unit, circular excavation to a designed elevation, bottom sealing, pipe jacking steel side wall unit disassembly, pipe jacking operation, backfill and recovery of each steel side wall unit from bottom to top.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911356749.9A CN111101542B (en) | 2019-12-25 | 2019-12-25 | Assembly type recyclable pipe jacking working well and construction process thereof |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911356749.9A CN111101542B (en) | 2019-12-25 | 2019-12-25 | Assembly type recyclable pipe jacking working well and construction process thereof |
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| CN111101542A true CN111101542A (en) | 2020-05-05 |
| CN111101542B CN111101542B (en) | 2021-05-07 |
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Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0945554A1 (en) * | 1998-03-24 | 1999-09-29 | Socea, naamloze vennootschap | Wall construction for shafts, prefabricated wall element for said construction, and casting mould for producing the wall element |
| JP2003082997A (en) * | 2001-09-11 | 2003-03-19 | Nippon Steel Corp | Concrete infilling steel segment structure |
| CN106703028A (en) * | 2016-11-22 | 2017-05-24 | 重庆建工第九建设有限公司 | Large-diameter manual hole digging pile prefabricated assembly type steel guard wall and construction technology thereof |
| CN106968688A (en) * | 2017-04-05 | 2017-07-21 | 宁波大学 | A kind of shield tunnel is combined tunnel segment structure and shield tunnel liner |
| CN110093942A (en) * | 2019-05-30 | 2019-08-06 | 安徽省交通控股集团有限公司 | A kind of assembled radical well foundation of two-wall hollow |
| CN209323549U (en) * | 2019-01-10 | 2019-08-30 | 刘建华 | Prefabricated assembled upper pipe working well prestressing force open caisson |
-
2019
- 2019-12-25 CN CN201911356749.9A patent/CN111101542B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0945554A1 (en) * | 1998-03-24 | 1999-09-29 | Socea, naamloze vennootschap | Wall construction for shafts, prefabricated wall element for said construction, and casting mould for producing the wall element |
| JP2003082997A (en) * | 2001-09-11 | 2003-03-19 | Nippon Steel Corp | Concrete infilling steel segment structure |
| CN106703028A (en) * | 2016-11-22 | 2017-05-24 | 重庆建工第九建设有限公司 | Large-diameter manual hole digging pile prefabricated assembly type steel guard wall and construction technology thereof |
| CN106968688A (en) * | 2017-04-05 | 2017-07-21 | 宁波大学 | A kind of shield tunnel is combined tunnel segment structure and shield tunnel liner |
| CN209323549U (en) * | 2019-01-10 | 2019-08-30 | 刘建华 | Prefabricated assembled upper pipe working well prestressing force open caisson |
| CN110093942A (en) * | 2019-05-30 | 2019-08-06 | 安徽省交通控股集团有限公司 | A kind of assembled radical well foundation of two-wall hollow |
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| CN111101542B (en) | 2021-05-07 |
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