CN203834500U - Oval digestion tank - Google Patents
Oval digestion tank Download PDFInfo
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- CN203834500U CN203834500U CN201320761509.9U CN201320761509U CN203834500U CN 203834500 U CN203834500 U CN 203834500U CN 201320761509 U CN201320761509 U CN 201320761509U CN 203834500 U CN203834500 U CN 203834500U
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- vertical prestressing
- anchorage zone
- prestressing bar
- fixed
- cushion cap
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Abstract
The utility model provides an oval digestion tank and relates to the technical field of waste water or sludge treatment. The oval digestion tank is used for solving the problem that when an existing oval digestion tank without a reinforcing structure at the bottom is built on a soft soil foundation, cracking and settling and other quality hazards happen. The oval digestion tank comprises a first digestion tank shell located underground and a second digestion tank shell located on the ground, a bearing table is arranged on the lower portion of the first digestion tank shell, a plurality of vertical prestressed tendons are arranged in the first digestion tank shell, the lower portion of the bearing table is in a frustum shape and is provided with a round bearing table bottom face, the vertical prestressed tendons are arranged in the first digestion tank shell in a radiating mode, the top ends of the vertical prestressed tendons are fixed on the side wall of the bearing table, and the bottom ends of the vertical prestressed tendons are fixed on the bottom face of the bearing table.
Description
Technical field
The utility model relates to waste water or technical field of sludge treatment, and particularly a kind of bottom is provided with the egg shaped digestion cell of vertical prestressing bar.
Background technology
Egg shaped digestion cell is a kind of large-scale water treatment building, has hyperboloid Rotation Shell Structure, and the capacity of being particularly suitable for is greater than 10000m
3large-scale digester, have that pond body stress performance is good, sludge agitation fully, the outstanding advantages such as high insulating effect.
Refer to Fig. 1, Chinese invention patent application number 03141718.3, name is called in the technical scheme of a kind of oval digestion tank and construction method thereof, oval digestion tank (being below all the referred to as egg shaped digestion cell 11) housing locating below ground level is connected with ring beam 12, the diaphragm wall of ring beam 12 belows surrounds the bottom of a pan morph concrete loose tool 13, diaphragm wall is as basis and the bracing of foundation pit of semi-underground type egg shaped digestion cell 11, accept the load of the egg shaped digestion cell 11 being transmitted by ring beam 12, improve integrally-built anti-seismic performance, the egg shaped digestion cell 11 concrete consumptions in bottom are reduced, but the egg shaped digestion cell of this technical scheme is the structure that are applicable on rock foundation, because of rock foundation supporting capacity higher, in element concrete loose tool 13 without the load that presstressed reinforcing steel is set also can bears egg shaped digestion cell 11.
But the domestic rivers and lakes of China are numerous, the distribution of weak soil is extremely extensive, as built above-mentioned egg shaped digestion cell on soft foundation, because soft foundation supporting capacity is poor, if do not taked special reinforcement measure, egg shaped digestion cell there will be the quality harm such as cracking, depression.And in prior art all less than the description of the technical scheme of reinforcing about egg shaped digestion cell bottom, visible, design a kind of egg shaped digestion cell being applicable on soft foundation and be necessity very.
Summary of the invention
Egg shaped digestion cell for existing bottom without ruggedized construction, be built in the problem that there will be the quality harm such as cracking, depression on soft foundation, the purpose of this utility model is to provide a kind of egg shaped digestion cell, can be built on soft foundation and structural safety, stable.
The utility model solves the technical scheme that its technical problem adopts: it comprises the digester housing one locating below ground level; Be positioned at digester housing two more than ground; The bottom of described digester housing one is provided with cushion cap, and described cushion cap is provided with at least one circumferential step; In described digester housing one, be provided with some vertical prestressing bars; Wherein, the bottom of described cushion cap is taper type and has a circular cushion cap bottom surface, described vertical prestressing bar is radial and is arranged in described digester housing one, the top of described vertical prestressing bar is fixed on the sidewall on close described ground of described cushion cap, and described cushion cap bottom surface is fixed in the bottom of described vertical prestressing bar.
Further, described cushion cap bottom surface is followed successively by the first anchorage zone and the second anchorage zone from inside to outside along the longitudinal axis of described egg shaped digestion cell, described the first anchorage zone and the second anchorage zone are that the center of circle is positioned at the concentric circles on described longitudinal axis, described vertical prestressing bar is that even number root and two adjacent described vertical prestressing bars are one group, each group has odd term vertical prestressing bar and even item vertical prestressing bar, the bottom of described odd term vertical prestressing bar is fixed on the circumference of described the first anchorage zone, the bottom of described even item vertical prestressing bar is fixed on the circumference of described the second anchorage zone, or the bottom of odd term vertical prestressing bar is fixed on the circumference of described the second anchorage zone, the bottom of even item vertical prestressing bar is fixed on the circumference of described the first anchorage zone.
Further, in described the first anchorage zone, be also provided with the core ruggedized construction coaxial with described longitudinal axis, described core ruggedized construction by some vertical reinforcements be sheathed on the cylindrical frame that the reinforcing bar cuff on described vertical reinforcement forms, and build in concrete and form.
Preferably, the outer wall of described odd term vertical prestressing bar and described core ruggedized construction one side is tangent and be fixed on the circumference of described the first anchorage zone, the outer wall of described even item presstressed reinforcing steel and described core ruggedized construction opposite side is tangent and be fixed on the circumference of described the second anchorage zone, or the outer wall of described odd term vertical prestressing bar and described core ruggedized construction one side is tangent and be fixed on the circumference of described the second anchorage zone, the outer wall of described even item presstressed reinforcing steel and described core ruggedized construction opposite side is tangent and be fixed on the circumference of described the first anchorage zone.
Described odd term vertical prestressing bar and described even item vertical prestressing bar are arranged in a crossed manner, and at the symmetrical net structure of the interior formation of digester housing one.
The radius of described core ruggedized construction is greater than 400mm.
The radius of described the first anchorage zone is greater than 900mm.
Described the second anchorage zone is 150mm～300mm apart from the distance B at the edge of described cushion cap bottom surface.
Effect of the present utility model is:
One, in the digester housing one that the utility model is connected with cushion cap at egg shaped digestion cell, be provided with vertical prestressing bar, the two ends of vertical prestressing reinforcing bar are connected with cushion cap bottom surface and cushion cap sidewall respectively.In the time of load action, the tensile stress that load produces can be offset or reduce to vertical prestressing bar, avoids egg shaped digestion cell to occur the quality harm such as cracking, depression, realized the design and construction of prestressed reinforced concrete egg shaped digestion cell on soft foundation.
Two, egg shaped digestion cell of the present utility model, the top spacing of vertical prestressing bar is fixed on cushion cap sidewall equably, its bottom is stretched into cushion cap bottom surface and is not pointed to bottom center, but after tangent with the column structure external surface of core stabilization zone, continue extend to two anchorage zones with certain intervals of bottom surface and fix, be that vertical prestressing bar is around core stabilization zone and is certain radius r1 and arranges, this subregion cloth muscle method can be avoided the destruction to concrete component of causing because of digester pond base concrete stress raisers.
Brief description of the drawings
Fig. 1 is the structural representation of existing egg shaped digestion cell;
Fig. 2 is the structural representation of egg shaped digestion cell of the present utility model;
Fig. 3 is the force analysis figure of egg shaped digestion cell;
Fig. 4 is the force analysis figure of egg shaped digestion cell bottom;
Fig. 5 is the layout plan of vertical prestressing bar in egg shaped digestion cell.
Detailed description of the invention
Below in conjunction with the drawings and specific embodiments, a kind of egg shaped digestion cell the utility model proposes is described in further detail.According to the following describes and claims, advantage of the present utility model and feature will be clearer.It should be noted that, accompanying drawing all adopts very the form of simplifying and all uses non-ratio accurately, only in order to convenient, the object of aid illustration the utility model embodiment lucidly.
Embodiment mono-: in conjunction with Fig. 2 to Fig. 5, a kind of egg shaped digestion cell 100 of the present utility model is described, it comprises the digester housing 1 locating below ground level; Be positioned at digester housing 2 102 more than ground; The bottom of digester housing 1 is provided with cushion cap 110, and cushion cap 110 is provided with two ring-shaped steps 111, is provided with some vertical prestressing bars 140 in digester housing 1.The bottom of cushion cap 110 is taper type and has a circular cushion cap bottom surface 112, vertical prestressing bar 140 is radial and is arranged in digester housing 1, and one end of vertical prestressing bar 140 is fixed on cushion cap bottom surface 112, the other end of vertical prestressing bar 140 is fixed on the sidewall on close ground of cushion cap 110.The vertical prestressing bar 140 arranging in the concrete of digester housing 1, do the used time at load (egg shaped digestion cell and internal liquid thereof), can offset or reduce the tensile stress that load produces, avoid egg shaped digestion cell 100 to occur the quality harm such as cracking, depression.
Further, as shown in Figure 2 and Figure 5, on cushion cap bottom surface 112, be followed successively by from inside to outside the first anchorage zone 114 and 115, the first anchorage zones 114, the second anchorage zone and the second 115Wei center of circle, anchorage zone along the longitudinal axis ax of egg shaped digestion cell 100 and be all positioned at the concentric circles on longitudinal axis ax.Because egg shaped digestion cell 100 is symmetrical structure, the total quantity of vertical prestressing bar 140 should be even number, as classified two adjacent vertical prestressing bars 140 as one group, in each group vertical prestressing bar 140, there is an odd term vertical prestressing bar 140a and an even item vertical prestressing bar 140b.The top spacing of vertical prestressing bar 140 is fixed on the sidewall of cushion cap 110 equably, and the bottom spacing of respectively organizing odd term vertical prestressing bar 140a is fixed on the circumference of the first anchorage zone 114 equably, the bottom spacing of each group even item vertical prestressing bar 140b is fixed on the circumference of the second anchorage zone 115 equably, is so arranged in order into symmetrical structure.Otherwise or the bottom of odd term vertical prestressing bar 140a is fixed on the circumference of the second anchorage zone 115, the bottom of even item vertical prestressing bar 140b is fixed on the circumference of the first anchorage zone 114.The structure that this symmetry of vertical prestressing bar 140 and subregion are arranged can be avoided in the concrete of egg shaped digestion cell 100 bottoms, producing the concentrated phenomenon of stress, and then has reduced stress and concentrated the risk that causes component damage.
Embodiment bis-: a kind of egg shaped digestion cell 100 of the present utility model is described in conjunction with Fig. 2 to Fig. 5, different from embodiment mono-is, as better technical scheme, in the first anchorage zone 114, be also provided with the core ruggedized construction 113 coaxial with longitudinal axis ax, core ruggedized construction 113 is arranged on cushion cap bottom surface 112, it forms cylindrical frame by some vertical reinforcements and sheathed reinforcing bar cuff thereon, and builds in concrete and form.After the outer wall of odd term vertical prestressing bar 140a and core ruggedized construction 113 1 sides is tangent, continue to extend to cushion cap bottom surface 112 and be fixed on the circumference of the first anchorage zone 114, and the outer wall of even item vertical prestressing bar 140b and core ruggedized construction 113 opposite sides tangent after, continue to extend to cushion cap bottom surface 112 and be fixed on the circumference of the second anchorage zone 115.Vertical prestressing bar 140 is tangent with core ruggedized construction 113 outer walls, and core ruggedized construction 113 can be born the stretching force of part vertical prestressing bar 140, has alleviated the stressed burden of cushion cap 110 sidewalls and bottom surface, is conducive to the stable of digester structure.
Odd term vertical prestressing bar 140a and even item vertical prestressing bar 140b are arranged in a crossed manner, and therefore, vertical prestressing bar 140, at the symmetrical net structure of the interior formation of digester housing 1, has increased the concrete bearing capacity of digester housing 1.Similarly, if be fixed on after the outer wall of odd term vertical prestressing bar 140a and core ruggedized construction 113 is tangent on the circumference of the second anchorage zone 115, after the outer wall of even item vertical prestressing bar 140b and core ruggedized construction 113 is tangent, be fixed on the first anchorage zone 114 circumference, all can realize the technical scheme of the present embodiment.
In technique scheme, the radius r 1 of core ruggedized construction 113 is greater than 400mm, the radius r 2 of the first anchorage zone 114 is greater than 900mm, the radius of the first anchorage zone 114 is compared with the large 500mm of the radius of core ruggedized construction 113, the ground tackle of vertical prestressing bar 140 can be evenly arranged on the circumference of the first anchorage zone 114, and can be too unconcentrated.The second anchorage zone 115 is 150mm～300mm apart from the distance B at 112 edges, cushion cap bottom surface, can make another part vertical prestressing bar 140 be dispersed on its circumference, can not make again pond feather edge concrete damage because local pressure is excessive.
The work progress of egg shaped digestion cell of the present utility model is described in conjunction with Fig. 2 to Fig. 5:
First, calculate the cross-sectional area of required vertical prestressing bar 140 in digester housing 1, and determine the quantity of vertical prestressing bar 140 according to the span of cross-sectional area;
Secondly, vertical prestressing bar 140 is to radial and is arranged in digester housing 1, the two ends of vertical prestressing bar 140 are separately fixed on the sidewall of cushion cap bottom surface 112 and cushion cap 110.
The computational methods of the cross-sectional area of the vertical prestressing bar 140 in above-mentioned digester housing 1 are described further combined with Fig. 4 and Fig. 5:
Disregarding under the condition that egg shaped digestion cell 100 pond top gas press, taking the concrete-pool-wall (being the face of A-A shown in Fig. 4) of egg shaped digestion cell 100 as stress point, the stretching force that N provides after for vertical prestressing bar 140 deduction losses with joint efforts; P is the tensile stress of concrete-pool-wall, G1 be in egg shaped digestion cell 100 cylindrical liquid 200(Fig. 3 in dotted line frame shown in) weight, G2 is the weight that is positioned at column liquid 200 below frustum shells 103 of digester housing 1.Because concrete component is prone to crack under tension state, in the present embodiment, for making concrete-pool-wall A-A face not bear tensile stress P, should meet: σ ck-σ pc≤0, this formula is recorded in " Code for design of concrete structures 2010 " 7.1 Crack Control checking computations.
Wherein, σ ck is under load standard combination, accurate permanent combination, the concrete normal stress at crack resisting calculation edge, the N/mm of unit
2;
After σ pc is the whole losss of prestress of deduction, at the concrete compressive pre-stress in crack resisting calculation edge, the N/mm of unit
2.
Can draw thus in the present embodiment: P-N≤0;
And P=(G1+G2)/cos θ;
N=S×μ×σcon；
Wherein: the tensile stress that P is concrete-pool-wall, the N of unit;
N deducts for vertical prestressing bar 140 pulling force providing after loss and makes a concerted effort, the N of unit;
G1 is the weight of egg shaped digestion cell 100 cylindrical liquid 200, the N of unit;
G2 is the weight of column liquid 200 below frustum shells 103, the N of unit;
S is the cross-sectional area of required vertical prestressing bar 140, the mm of unit
2;
μ is the loss coefficient of vertical prestressing bar 140;
σ con is the control stress for prestressing of vertical prestressing bar 140, the N/mm of unit
2, (control stress for prestressing refers to the maximum stress value that prestressed reinforcement reaches in the time carrying out stretch-draw, namely tensioning equipment, the stress value that total stretching force as indicated in the dynamometer on jack draws divided by prestressed reinforcement cross sectional area.）
In sum, further draw: S >=(G1+G2)/(μ × σ con × cos θ), is the span of the cross-sectional area of required vertical prestressing bar 140.Then, determine the quantity of vertical prestressing bar 140 according to the model of above-mentioned vertical prestressing bar 140 cross-sectional areas and the selected vertical prestressing bar 140 of constructing and specification.
How vertical prestressing bar 140 is reasonably arranged in digester housing 1, details are as follows in concrete expansion:
First, on cushion cap bottom surface 112, mark off successively from inside to outside the first anchorage zone 114 and the second anchorage zone 115 along the longitudinal axis ax of egg shaped digestion cell 100, and the first anchorage zone 114 and the second 115Wei center of circle, anchorage zone are positioned at the concentric circles on longitudinal axis ax, on the circumference of the first anchorage zone 114 and the second anchorage zone 115, are embedded with equally distributed ground tackle;
Secondly, the top spacing of even number vertical prestressing bar 140 is fixed on the sidewall of cushion cap 110 equably, and two adjacent vertical prestressing bars 140 are divided into a group, respectively there are an odd term vertical prestressing bar 140a and an even item vertical prestressing bar 140b in each group;
Finally, the bottom of odd term vertical prestressing bar 140a is fixed on the ground tackle of the first anchorage zone 114, the bottom of even item vertical prestressing bar 140b is fixed on the ground tackle of the second anchorage zone 115, or the bottom of odd term vertical prestressing bar 140a is fixed on the ground tackle of the second anchorage zone 115, the bottom of even item vertical prestressing bar 140b is fixed on the ground tackle of the first anchorage zone 114.
More superior constructure scheme is: on cushion cap bottom surface 112, mark off successively from inside to outside core stabilization zone 113, the first anchorage zone 114 and the second anchorage zone 115 along the longitudinal axis ax of egg shaped digestion cell 100, and core stabilization zone 113, the first anchorage zone 114 and the second 115Wei center of circle, anchorage zone are positioned at the concentric circles on longitudinal axis ax, on the circumference of the first anchorage zone 114 and the second anchorage zone 115, are embedded with equally distributed ground tackle;
The top spacing of even number vertical prestressing bar 140 is fixed on the sidewall of cushion cap 110 equably, and two adjacent vertical prestressing bars 140 are divided into a group, there are an odd term vertical prestressing bar 140a and an even item vertical prestressing bar 140b in every group;
After the outer wall of the bottom of odd term vertical prestressing bar 140a and core ruggedized construction 113 1 sides is tangent, continue to extend to cushion cap bottom surface 112 and be fixed on the ground tackle of the first anchorage zone 114 circumference, after the outer wall of even item vertical prestressing bar 140b and core ruggedized construction 113 opposite sides is tangent, continue to extend to cushion cap bottom surface 112 and be fixed on the ground tackle of the second anchorage zone 115 circumference, or contrary, the link position of odd term vertical prestressing bar 140a and even item vertical prestressing bar 140b bottom is exchanged, also can be realized the technical solution of the utility model.
Better, the vertical prestressing bar 140 that is individually fixed in the first anchorage zone 114 and the second anchorage zone 115 intersects to form symmetrical net structure.
Core ruggedized construction 113 is arranged on cushion cap bottom surface 112, and it forms cylindrical frame by some vertical muscle and sheathed lateral tie thereon, and builds in concrete and form.The radius r 1 of core ruggedized construction 113 is greater than 400mm.
The utility model is the egg shaped digestion cell for Design of Soft Soil, in the situation that this egg shaped digestion cell cushion cap can meet arrangement of pile foundation, make the concrete structure form of cushion cap change into taper from traditional bulk, entirety is saved reinforcing bar and concrete consumption is about 5%.
In the digester housing one being connected with cushion cap at egg shaped digestion cell, be provided with vertical prestressing bar, the two ends of vertical prestressing reinforcing bar are connected with cushion cap bottom surface and cushion cap sidewall respectively.In the time of load action, the tensile stress that load produces can be offset or reduce to vertical prestressing bar, avoids egg shaped digestion cell to occur the quality harm such as cracking, depression.Realize the design and construction of prestressed reinforced concrete egg shaped digestion cell on soft foundation.
Particularly importantly, the top spacing of vertical prestressing bar is fixed on cushion cap sidewall equably, its bottom is stretched into cushion cap bottom surface and is not pointed to bottom center, but after tangent with the external surface of core ruggedized construction, continue extend to two anchorage zones with certain intervals of bottom surface and fix, be that vertical prestressing bar is around core stabilization zone and is certain radius r1 and arranges, this subregion cloth muscle method can be avoided the destruction of the concrete component causing because of digester pond base concrete stress raisers.
Foregoing description is only the description to the utility model preferred embodiment; the not any restriction to the utility model scope; any change, modification that the those of ordinary skill in the utility model field does according to above-mentioned disclosure, all belong to the protection domain of claims.
Claims (8)
1. an egg shaped digestion cell, is characterized in that, comprising:
The digester housing one locating below ground level;
Be positioned at digester housing two more than ground;
The bottom of described digester housing one is provided with cushion cap, and described cushion cap is provided with at least one circumferential step;
In described digester housing one, be provided with some vertical prestressing bars;
Wherein, the bottom of described cushion cap is taper type and has a circular cushion cap bottom surface, described vertical prestressing bar is radial and is arranged in described digester housing one, the top of described vertical prestressing bar is fixed on the sidewall on close described ground of described cushion cap, and described cushion cap bottom surface is fixed in the bottom of described vertical prestressing bar.
2. egg shaped digestion cell according to claim 1, it is characterized in that: described cushion cap bottom surface is followed successively by the first anchorage zone and the second anchorage zone from inside to outside along the longitudinal axis of described egg shaped digestion cell, described the first anchorage zone and the second anchorage zone are that the center of circle is positioned at the concentric circles on described longitudinal axis, described vertical prestressing bar is that even number root and two adjacent described vertical prestressing bars are one group, each group has odd term vertical prestressing bar and even item vertical prestressing bar, the bottom of described odd term vertical prestressing bar is fixed on the circumference of described the first anchorage zone, the bottom of described even item vertical prestressing bar is fixed on the circumference of described the second anchorage zone, or the bottom of odd term vertical prestressing bar is fixed on the circumference of described the second anchorage zone, the bottom of even item vertical prestressing bar is fixed on the circumference of described the first anchorage zone.
3. egg shaped digestion cell according to claim 2, it is characterized in that: in described the first anchorage zone, be also provided with the core ruggedized construction coaxial with described longitudinal axis, described core ruggedized construction by some vertical reinforcements be sheathed on the cylindrical frame that the reinforcing bar cuff on described vertical reinforcement forms, and build in concrete and form.
4. egg shaped digestion cell according to claim 3, it is characterized in that: the outer wall of described odd term vertical prestressing bar and described core ruggedized construction one side is tangent and be fixed on the circumference of described the first anchorage zone, the outer wall of described even item presstressed reinforcing steel and described core ruggedized construction opposite side is tangent and be fixed on the circumference of described the second anchorage zone, or the outer wall of described odd term vertical prestressing bar and described core ruggedized construction one side is tangent and be fixed on the circumference of described the second anchorage zone, the outer wall of described even item presstressed reinforcing steel and described core ruggedized construction opposite side is tangent and be fixed on the circumference of described the first anchorage zone.
5. according to the egg shaped digestion cell described in claim 2 to 4 any one, it is characterized in that: described odd term vertical prestressing bar and described even item vertical prestressing bar are arranged in a crossed manner, and at the symmetrical net structure of the interior formation of digester housing one.
6. according to the egg shaped digestion cell described in claim 3 or 4, it is characterized in that: the radius of described core ruggedized construction is greater than 400mm.
7. according to the egg shaped digestion cell described in claim 2 to 4 any one, it is characterized in that: the radius of described the first anchorage zone is greater than 900mm.
8. according to the egg shaped digestion cell described in claim 2 to 4 any one, it is characterized in that: described the second anchorage zone is 150mm～300mm apart from the distance B at the edge of described cushion cap bottom surface.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320761509.9U CN203834500U (en) | 2013-11-27 | 2013-11-27 | Oval digestion tank |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320761509.9U CN203834500U (en) | 2013-11-27 | 2013-11-27 | Oval digestion tank |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203834500U true CN203834500U (en) | 2014-09-17 |
Family
ID=51512360
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201320761509.9U Withdrawn - After Issue CN203834500U (en) | 2013-11-27 | 2013-11-27 | Oval digestion tank |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203834500U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103628496A (en) * | 2013-11-27 | 2014-03-12 | 上海市政工程设计研究总院（集团）有限公司 | Egg-shaped digestion tank and construction method of vertical prestressed tendons at bottom of egg-shaped digestion tank |
-
2013
- 2013-11-27 CN CN201320761509.9U patent/CN203834500U/en not_active Withdrawn - After Issue
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103628496A (en) * | 2013-11-27 | 2014-03-12 | 上海市政工程设计研究总院（集团）有限公司 | Egg-shaped digestion tank and construction method of vertical prestressed tendons at bottom of egg-shaped digestion tank |
| CN103628496B (en) * | 2013-11-27 | 2018-03-02 | 上海市政工程设计研究总院（集团）有限公司 | The construction method of egg shaped digestion cell and its bottom vertical prestressing bar |
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| AV01 | Patent right actively abandoned |
Granted publication date: 20140917 Effective date of abandoning: 20180302 |