CN104762931A - Method for improving integral type bottom plate stress by means of ballasting - Google Patents
Method for improving integral type bottom plate stress by means of ballasting Download PDFInfo
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- CN104762931A CN104762931A CN201510201189.5A CN201510201189A CN104762931A CN 104762931 A CN104762931 A CN 104762931A CN 201510201189 A CN201510201189 A CN 201510201189A CN 104762931 A CN104762931 A CN 104762931A
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- ballast
- base plate
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- unitary underframe
- bottom plate
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Abstract
The invention discloses a method for improving integral type bottom plate stress by means of ballasting. The method is characterized by comprising the steps that slope excavation is conducted on a foundation pit; integral type bottom plate construction is conducted; ballasting is conducted on the bottom plate through a ballast body, and side wall pouring and back fill construction for soil behind a wall are conducted continuously; the ballast body is cleared up. According to the method for improving the integral type bottom plate stress by means of ballasting, adverse effects of various loads such as a boundary load and foundation resilience force to the bottom plate in the integral type structure construction process can be reduced, cracking of the bottom plate is effectively prevented, the durability of the structure is strengthened, the construction is easy, the implementation is convenient, and the engineering cost is low.
Description
Technical field
The present invention relates to water transport hydraulic engineering technical field, is more specifically monolithic lock head and the lock chamber structure of a kind of large-scale ship lock, dock and sluice.
Background technology
In the water transport hydraulic engineering technical fields such as ship lock, dock and sluice, monolithic construction is a kind of very important structural shape.This structure by base plate and abutment wall (according to the difference of engineering field, also can be described as the title such as abutment pier or gate pier) composition, it is overall stressed good to have, barrier properties is strong, subgrade reaction distribution is more even, to advantages such as ground requirement for bearing capacity are lower, often adopt in some large-scale water transport hydraulic engineerings.But engineering practice shows, the base plate of monolithic construction often can produce crack in work progress, and the crack especially in the middle part of plate upper surface is the most common.Analyze its reason, the load such as temperature load, side load, humidity load, ground screen resilience that structure is born is comparatively large, and causing surperficial maximum tension stress to exceed concrete tensile strength is major reason.
For this reason, people propose various measure according to Causes of Fracture from multiple angles, as strengthened base plate sectional dimension, add and join reinforcing bar, adopt reserved wide seam construction method construction (referring to " research of Method of Setting Up Construction Joint In Large Lock Foundation Plate " literary composition and " Changsha Traffic College " the 2nd phase in 1996 " impact of Influcnce of Lock Floor By Different Construction Methods " literary composition of " civil engineering journal " the 1st phase in 1992), the concrete of routine is replaced with fibrous concrete (" experimental study of fibrous concrete in the Third-Line Shiplock engineering of soap river, Suqian " referring to " Modern Transportation Technology " the 6th phase in 2009 is civilian), change conventional construction order, first carry out the backfill of the part soil body, carry out again (refer to Chinese patent ZL201010606658 and " reduce the method for side load influence ") such as the constructions of foundation ditch inner structure, adopt prestressed reinforcement (" the linear layout study of docking lock floor presstressed reinforcing steel " referring to " Chongqing Jiaotong University's journal (natural science edition) " the 5th phase in 2013 is civilian), and portion arranges prominent rib in the soleplate, lay and compensate cushion course, in bottom end, key-wall is set, the methods such as (" Improving Measurements that docking lock floor is stressed and the effect analysis thereof " referring to " water conservancy and hydropower technology " o. 11th in 2014 are civilian) such as window shade sheet pile are squeezed in ground.
Although above method effect is better, and trend towards the seamless process construction of constructing fairly simple, also to there is construction in some method more complicated simultaneously, affects the duration, or some shortcomings such as construction investment is large.Given this, design a kind of easy seamless process construction method newly and improve monolithic construction bottom slab stress, solve the problem that in monolithic construction work progress, concrete easily ftractures very necessary.
Summary of the invention
For overcoming the deficiency that existing method exists, improving monolithic construction bottom slab stress, the invention provides a kind of ballast that utilizes and improve the stressed method of unitary underframe.
The present invention is by the following technical solutions: a kind of ballast that utilizes improves the stressed method of unitary underframe, implements according to the following steps:
(1) slope excavation pit is put;
(2) unitary underframe construction;
(3) utilize ballast carrier to base plate ballast, and proceed abutment wall and build and rolling earth behind retaining wall backfill construction;
(4) ballast carrier is cleared up.
Further, described ballast carrier is the structure or the device that base plate are produced to downward ballast effect.
Further, abutment wall build with wall after the soil body backfill construction time, calculate ballast to the action effect of base plate.
Preferably, Finite Element Method is adopted to carry out computation and analysis.
Further, according to the action effect size of ballast to base plate, the distribution of adjustment ballast and size.
Further, the deadweight of structure or device is utilized to produce the downward ballast effect of base plate.
Preferably, described structure or device are for ease of the weight stacked and walk clearly.
Preferably, described weight is filling water or sandy soil, simultaneously the convenient sealing bag opened and closed.
The present invention compared with prior art, tool has the following advantages: the present invention makes full use of the feature be connected with base plate with the abutment wall playing monolithic construction itself, employing ballast mode reduces and resists the adverse effect that the loads such as temperature load, side load, humidity load, ground screen resilience produce base plate, thus the maximum tension stress of backplate surface in reduction work progress, effectively prevention underplate concrete cracking.In addition, ballast is implemented simple, and easy construction, construction costs is low.
In sum, a kind of method superiority utilizing ballast to improve unitary underframe stressed is good.
Accompanying drawing explanation
Fig. 1 uses a kind of construction schematic diagram utilizing ballast to improve the stressed method of unitary underframe that the present invention relates to.
Wherein: 1, excavation face; 2, base plate; 3, abutment wall; 4, ballast carrier; 5, banket.
Detailed description of the invention
In order to make design of the present invention, actualizing technology means, main creation characteristic be easy to clear, setting forth below in conjunction with Fig. 1 a kind of ballast that utilizes that the present invention relates to further and improving the stressed method of unitary underframe.
Shown in Figure 1, embodiment is use the large-scale ship lock dock type lock chamber structure construction schematic diagram of this method.This method is carried out successively as follows:
(1) slope excavation pit (see excavation face in figure 1) is put;
(2) unitary underframe 2 is constructed;
(3) utilize ballast carrier 4 pairs of base plate ballasts, and proceed abutment wall 3 and build and rolling earth behind retaining wall 5 backfill construction;
(4) ballast carrier 4 is cleared up.
More than show and describe technical conceive of the present invention and principal character, the technician of the industry should be able to understand content of the present invention and can implement according to this.What above-described embodiment and manual described is in order to basic ideas of the present invention and basic implementation step are described, can not limit the scope of the invention with this.Without departing from the spirit and scope of the present invention, the present invention also has various changes and modifications, and these changes and improvements all fall in the claimed scope of the invention, and application claims protection domain is defined by appending claims and equivalent thereof.
Claims (9)
1. utilize ballast to improve the stressed method of unitary underframe, it is characterized in that implementing according to the following steps:
(1) slope excavation pit is put;
(2) unitary underframe construction;
(3) utilize ballast carrier to base plate ballast, and proceed abutment wall and build and rolling earth behind retaining wall backfill construction;
(4) ballast carrier is cleared up.
2. the ballast that utilizes according to claim 1 improves the stressed method of unitary underframe, it is characterized in that: described ballast carrier is that generation is to the structure of the downward ballast effect of base plate or device.
3. the ballast that utilizes according to claim 2 improves the stressed method of unitary underframe, it is characterized in that: abutment wall build with wall after the soil body backfill construction time, calculate ballast to the action effect of base plate.
4. the ballast that utilizes according to claim 3 improves the stressed method of unitary underframe, it is characterized in that: abutment wall build with wall after the soil body backfill construction time, according to the action effect size of ballast to base plate, the adjustment distribution of ballast and size.
5. the ballast that utilizes according to claim 2 improves the stressed method of unitary underframe, it is characterized in that: utilize the deadweight of structure or device to produce the downward ballast effect of base plate.
6. the ballast that utilizes according to claim 5 improves the stressed method of unitary underframe, it is characterized in that: described structure or device are for ease of the weight stacked and walk clearly.
7. the ballast that utilizes according to claim 6 improves the stressed method of unitary underframe, it is characterized in that: described weight is filling water or sandy soil, simultaneously the convenient sealing bag opened and closed.
8. the ballast that utilizes according to claim 7 improves the stressed method of unitary underframe, it is characterized in that: abutment wall build with wall after the soil body backfill construction time, calculate sealing bag ballast to the action effect of base plate.
9. the ballast that utilizes according to claim 8 improves the stressed method of unitary underframe, it is characterized in that: abutment wall build with wall after the soil body backfill construction time, according to the action effect size of ballast to base plate, adjust distribution and the size of airtight bag ballast.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510201189.5A CN104762931B (en) | 2015-04-27 | 2015-04-27 | A kind of method utilizing ballast to improve unitary underframe stress |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510201189.5A CN104762931B (en) | 2015-04-27 | 2015-04-27 | A kind of method utilizing ballast to improve unitary underframe stress |
Publications (2)
| Publication Number | Publication Date |
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| CN104762931A true CN104762931A (en) | 2015-07-08 |
| CN104762931B CN104762931B (en) | 2016-08-17 |
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| CN201510201189.5A Expired - Fee Related CN104762931B (en) | 2015-04-27 | 2015-04-27 | A kind of method utilizing ballast to improve unitary underframe stress |
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Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| SU844662A1 (en) * | 1978-04-03 | 1981-07-07 | Ленинградское Отделение Всесоюзного Орденаленина Проектно-Изыскательского И Научно- Исследовательского Института "Гидропроект"Им. C.Я.Жука (Ленгидропроект) | Mooring arrangement for navigable canals and locks |
| KR20080080063A (en) * | 2007-08-17 | 2008-09-02 | 한상관 | Method to purify water quality of river using rotation water gate preventing from inflow of heterogeneous materials |
| CN201485840U (en) * | 2009-08-11 | 2010-05-26 | 中国水电顾问集团华东勘测设计研究院 | L-shaped single-side lock wall structure |
| CN202559326U (en) * | 2012-04-25 | 2012-11-28 | 安徽省交通勘察设计院 | High side pier highly-filled soil ship lock chamber U-shaped prestressed cable dock type structure system |
-
2015
- 2015-04-27 CN CN201510201189.5A patent/CN104762931B/en not_active Expired - Fee Related
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| SU844662A1 (en) * | 1978-04-03 | 1981-07-07 | Ленинградское Отделение Всесоюзного Орденаленина Проектно-Изыскательского И Научно- Исследовательского Института "Гидропроект"Им. C.Я.Жука (Ленгидропроект) | Mooring arrangement for navigable canals and locks |
| KR20080080063A (en) * | 2007-08-17 | 2008-09-02 | 한상관 | Method to purify water quality of river using rotation water gate preventing from inflow of heterogeneous materials |
| CN201485840U (en) * | 2009-08-11 | 2010-05-26 | 中国水电顾问集团华东勘测设计研究院 | L-shaped single-side lock wall structure |
| CN202559326U (en) * | 2012-04-25 | 2012-11-28 | 安徽省交通勘察设计院 | High side pier highly-filled soil ship lock chamber U-shaped prestressed cable dock type structure system |
Non-Patent Citations (2)
| Title |
|---|
| 吕强等: "《不同施工过程对船闸闸首底板应力影响的仿真模拟分析》", 《长沙交通学院学报》 * |
| 王浩: "《地下室结构的抗浮设计与分析》", 《合肥工业大学硕士学位论文》 * |
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| CN104762931B (en) | 2016-08-17 |
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