CN101806147B - Self-adaptive horizontal thrust control device of civil engineering structure and control method thereof - Google Patents
Self-adaptive horizontal thrust control device of civil engineering structure and control method thereof Download PDFInfo
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- CN101806147B CN101806147B CN2010101307466A CN201010130746A CN101806147B CN 101806147 B CN101806147 B CN 101806147B CN 2010101307466 A CN2010101307466 A CN 2010101307466A CN 201010130746 A CN201010130746 A CN 201010130746A CN 101806147 B CN101806147 B CN 101806147B
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Abstract
The invention relates to a self-adaptive horizontal thrust control device of a civil engineering structure and a control method thereof. The self-adaptive horizontal thrust control device is characterized in that two corresponding sides of a civil engineering structure body to be pushed are respectively connected with a bearing block in opposite directions, the top surfaces of the bearing blocks are narrow, the bottom surfaces of the bearing blocks are wide, one end of each bearing block is an inclined surface, and the two bearing blocks form a trapezoidal space with a wide top surface and a narrow bottom surface; the side face of a thrust rod is of a trapezoidal shape with a wide top surface and a narrow bottom surface, the slopes of inclined surfaces on the two ends of the thrust rod are identical to the slopes of the inclined surfaces of the corresponding bearing blocks, the thrust rod is directly arranged in the trapezoidal space, the two opposite inclined surfaces of the thrust rod are tightly matched with the each other, and the thrust rod is contacted with the trapezoidal space through the inclined surfaces so as to convert vertical force into horizontal thrust. The inclined surfaces of the two bearing blocks and the inclined surfaces on the two ends of the thrust rod are respectively connected with a face plate, and the friction coefficients of the face plates are less than or equal to 0.05. The invention has the advantages of simple structure and convenient construction, and can automatically adapt to the deformation of the structure so as to maintain the horizontal thrust within the acceptable range, thereby ensuring the safety of the structure.
Description
Technical field
The present invention relates to a kind of self-adaptive horizontal thrust control device of civil engineering structure and control method, belong to civil engineering structure design and construction technical field, be particularly useful for the technical field that structure pushing tow, system conversion etc. in the civil engineerings such as bridge or building need controlling level thrust.
Background technology
Distance rod can transmit horizontal thrust, makes that structure can self-balancing, therefore, is specially adapted in the structures such as pattern foundation pit supporting structure and bridge thrust transmission.The type of attachment that distance rod is commonly used is the rod member termination and is fixed by selection structure that the material of distance rod is concrete or steel.No matter be concrete frame or steel pipe, all need to rely on the compression of self that thrust is provided, correspondingly, compressive strain can appear in distance rod.This means that distortion has also appearred in the structure that needs pushing tow, and then bring additional internal force to structure, particularly when the big and cross section of thrust hour, the distortion of distance rod influences structural safety with excessive.
In order to reduce compress variation, usually adopt jack to apply prestressed method, but still there are some problems in actual applications in this method: (1) adds thrust in advance may be unfavorable to structure, for example, applied thrust before arch bridge unloading can increase the eccentricity of bridge pier, and thrust can only increase synchronously in the process that arch bridge is removed, promptly increase thrust, but do construction period like this and expense all can rise while unloading; (2) act on structural contraction, creep and temperature etc. is constantly to change, make the length of distance rod also be among the continuous variation, and then influence the size of thrust.Variations in temperature particularly, when distance rod was longer, the temperature deformation that causes was bigger.Temperature raises, and then distance rod elongation may cause thrust excessive; Temperature reduces, and then distance rod shortens, and may cause thrust to disappear.For addressing this problem, with regard to the variation of necessary long term monitoring thrust, and adjust thrust at any time, this will bring huge monitoring cost; (3) be the controlled deformation amount, often use jack to provide and control thrust.The effect of jack can be eliminated the distortion that part is caused by compression for distance rod applies precompression on the one hand; Can when changing, thrust regulate thrust on the other hand.But the pressure of jack can not be stablized for a long time, and phenomenons such as leakage of oil happen occasionally, and therefore, such distance rod in use needs constantly to carry out the thrust adjustment, is not suitable for permanent structure.
As can be seen, overcome the above problems, need a kind of device that can keep the thrust size automatically, make not by jack or other power set, thrust can be provided, and can compress, shrink, creep and effect such as temperature under horizontal thrust is kept within the specific limits to guarantee the safety of structure.
Summary of the invention
The invention discloses a kind of self-adaptive horizontal thrust control device of civil engineering structure and control method, its purpose is to overcome and adopts distance rod termination and the form of being fixed by selection structure to carry out horizontal thrust control in the existing construction, to the adverse effect of constructing and being caused, as because of pressure, shrink, creep and variation such as temperature, cause the distortion of structure, to such an extent as to produce structural safety hidden danger.Adopt control device of the present invention and control method, can adapt to by a variety of causes such as pressure automatically, shrink, creep and distortion that effect such as temperature causes, simultaneously horizontal thrust is remained in the specified scope, guarantee that civil engineering structure is stressed evenly, guarantee the safety of structure.
Technical solution of the present invention is as follows:
A kind of self-adaptive horizontal thrust control device of civil engineering structure, it is characterized in that: respectively connected a rest pad in opposite directions by the corresponding both sides of the civil engineering structure body of pushing tow, the narrow bottom surface of described rest pad end face is wide, and an end is the inclined-plane, is the narrow trapezoid space in the wide bottom surface of end face between two rest pads; The distance rod side is narrow trapezoidal in the wide bottom surface of end face, and the slope on inclined-plane, distance rod two ends equates that with the slope on corresponding rest pad inclined-plane distance rod directly is positioned in the trapezoid space, and two pairs of inclined-planes are tight fit, and the distance rod top is provided with counterweight.
Described two rest pad inclined-planes, inclined-plane, distance rod two ends respectively are connected with panel, friction factor f≤0.05 of panel.
The ratio B of the wide height in described rest pad inclined-plane: H≤1: 5.
The control method of described self-adaptive horizontal thrust control device of civil engineering structure is characterized in that: the distance rod two ends contact by the inclined-plane with rest pad, make vertical force be converted into horizontal thrust, and the excursion of horizontal thrust satisfies following relational expression:
F＝[G/(Sinθ+f)，6/(Sinθ-f)](1)
Wherein, the horizontal thrust of F for producing;
G is
(distance rod deadweight+counterweight);
θ is an inclination angle of inclined plane, and inclination angle of inclined plane θ is less, tg θ=inclined-plane the ratio of width to height;
F is the panel friction factor;
When the F that calculates by (1) formula when the weight of distance rod self can not satisfy the needs of thrust, by increase, reduce, the cancellation counterweight regulates; Or by changing rest pad and distance rod inclination angle of inclined plane θ; Or change panel material and adjust friction factor f; Or the wherein combination of two or more mode arbitrarily; Excursion with controlling level thrust.
Described distance rod can adopt concrete material or steel to do.
The present invention is simple in structure, easy to use, provide vertical force by distance rod deadweight or its counterweight, need not machinery or power set such as jack or motor, effect by the inclined-plane, make the vertical force that produces by distance rod deadweight and counterweight zoom into horizontal thrust at double, and pass through the excursion of friction factor controlling level thrust.No matter structure is owing to any reason has produced horizontal distortion, and this device can both adapt to.When distance rod extended, thrust increased, and prescribed a time limit when exceeding on the thrust, and is sliding on the distance rod; When distance rod shortened, thrust reduced, and prescribed a time limit when exceeding under the thrust, and distance rod glides.The thrust that is produced can remain in the allowed band all the time like this, thus the safety of protection structure.
Biggest advantage of the present invention and good effect are:
(1) simple in structure, easy to implement, need not add thrust in advance, can not bring additional thrust to structure;
(2) distortion of commensurate structure automatically remains in the allowed band horizontal thrust, thereby guarantees structural safety;
(3) need not machinery or power set such as jack or motor, be convenient to long-term use, can make permanent structure.
The present invention is particularly useful for the field that structure pushing tow, system conversion etc. in the civil engineerings such as bridge, building need controlling level thrust.
Description of drawings
Fig. 1 is an overall structure schematic diagram of the present invention.
1. by the civil engineering structure body of pushing tow, 2. rest pad, 3. panel, 4. distance rod, 5. counterweight, θ. inclination angle of inclined plane, H. bevel altitude, B. surface width.
The specific embodiment
Below in conjunction with drawings and Examples the present invention is further described, but present embodiment is not limited to the present invention, every employing analog structure of the present invention and method and similar variation thereof all should be listed protection scope of the present invention in.
A kind of self-adaptive horizontal thrust control device of civil engineering structure, as shown in Figure 1: respectively connected a rest pad 2 in opposite directions by the corresponding both sides of the civil engineering structure body 1 of pushing tow, the narrow bottom surface of described rest pad 2 end faces is wide, and an end is the inclined-plane, is the narrow trapezoid space in the wide bottom surface of end face between two rest pads; Distance rod 4 sides are narrow trapezoidal in the wide bottom surface of end face, the distance rod two ends are the inclined-plane, the slope on two inclined-planes equates with the slope on corresponding rest pad 2 inclined-planes, distance rod 4 directly is positioned in the trapezoid space, two pairs of inclined-planes are tight fit, control method is by the inclined-plane contact, makes vertical force be converted into horizontal thrust.
Two rest pad inclined-planes and distance rod inclined-plane respectively are connected with the panel 3 that adopts lubricious material to make, and the present invention adopts the tetrafluoro plate, friction factor f≤0.05.
The ratio B of the wide height in rest pad inclined-plane: H≤1: 5, less to guarantee inclination angle of inclined plane θ, can produce enough big thrust.
Distance rod 4 tops are connected with counterweight 5, and the excursion of horizontal thrust satisfies following relational expression:
F＝[6/(Sinθ+f)，G/(Sinθ-f)] (1)
Wherein, the horizontal thrust of F for producing;
G is
(distance rod deadweight+counterweight);
θ is an inclination angle of inclined plane, and inclination angle of inclined plane θ is less, tg θ=inclined-plane the ratio of width to height;
F is panel 3 friction factor.
When the F that calculates by (1) formula when the weight of distance rod 4 self can not satisfy the needs of thrust, can be by increasing, reduce or cancellation counterweight 5 being regulated; Or by changing rest pad and distance rod inclination angle of inclined plane θ; Or change panel material to adjust friction factor f; Or the wherein combination of two or more mode arbitrarily; Excursion with controlling level thrust.
When distance rod 4 caused that owing to temperature raises length increases, thrust can increase, and surpassed on the thrust of calculating when thrust and prescribed a time limit, and then can make distance rod 4 sliding on the whole, to keep the stable of thrust; Because the change in length amount of distance rod 4 is generally all very little, even the inclined-plane slope is bigger, the upward sliding amount of caused distance rod 4 is also little.The ratio of width to height B when the inclined-plane: H is in the time of 1: 5, and the elongation of supposing distance rod 4 is 10mm, and then going up sliding amount only is 5cm, if the friction factor of panel 3 is 0.01 at this moment, then the excursion of horizontal thrust is greatly about [5% ,+5%].When temperature reduces when causing that distance rod 4 length reduce, distance rod 4 glides and horizontal thrust still can keep stable.
When the weight of distance rod 4 self can satisfy the needs of thrust, can cancel counterweight 5; If needed distance rod 4 length are bigger, when using the ordinary concrete material to be difficult to satisfy intensity and stability requirement, can adopt the material of prestressed concrete or high-strength light such as steel pipe to make distance rod 4.
Claims (4)
1. self-adaptive horizontal thrust control device of civil engineering structure, it is characterized in that: respectively connected a rest pad in opposite directions by the corresponding both sides of the civil engineering structure body of pushing tow, the narrow bottom surface of described rest pad end face is wide, and an end is the inclined-plane, is the narrow trapezoid space in the wide bottom surface of end face between two rest pads; The distance rod side is narrow trapezoidal in the wide bottom surface of end face, and the slope on inclined-plane, distance rod two ends equates that with the slope on corresponding rest pad inclined-plane distance rod directly is positioned in the trapezoid space, and two pairs of inclined-planes are tight fit, and the distance rod top is provided with counterweight.
2. self-adaptive horizontal thrust control device of civil engineering structure according to claim 1 is characterized in that: described two rest pad inclined-planes, inclined-plane, distance rod two ends respectively are connected with panel, friction factor f≤0.05 of panel.
3. self-adaptive horizontal thrust control device of civil engineering structure according to claim 1 is characterized in that: the ratio B of the wide height in described rest pad inclined-plane: H≤1: 5.
4. the control method of self-adaptive horizontal thrust control device of civil engineering structure according to claim 1, it is characterized in that: the distance rod two ends contact by the inclined-plane with rest pad, make vertical force be converted into horizontal thrust, the excursion of horizontal thrust satisfies following relational expression:
F＝[G/(Sinθ+f)，G/(Sinθ-f)] (1)
Wherein, the horizontal thrust of F for producing;
G is
(distance rod deadweight+counterweight);
θ is an inclination angle of inclined plane, and inclination angle of inclined plane θ is less, tg θ=inclined-plane the ratio of width to height;
F is the panel friction factor;
When the F that calculates by (1) formula when the weight of distance rod self can not satisfy the needs of thrust, by increase, reduce, the cancellation counterweight regulates; Or by changing rest pad and distance rod inclination angle of inclined plane θ; Or change panel material and adjust friction factor f; Or the wherein combination of two or more mode arbitrarily of selection; Excursion with controlling level thrust.
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| Application Number | Priority Date | Filing Date | Title |
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| CN2010101307466A CN101806147B (en) | 2010-03-23 | 2010-03-23 | Self-adaptive horizontal thrust control device of civil engineering structure and control method thereof |
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| CN2010101307466A CN101806147B (en) | 2010-03-23 | 2010-03-23 | Self-adaptive horizontal thrust control device of civil engineering structure and control method thereof |
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| CN101806147B true CN101806147B (en) | 2011-08-24 |
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| CN1811070A (en) * | 2005-01-28 | 2006-08-02 | 上海市第七建筑有限公司 | First-arch-then-beam concrete steel skeleton constructing process for through arch bridge with mooring post of steel pipe concrete |
| CN1718972A (en) * | 2005-06-09 | 2006-01-11 | 大连久鼎特种建筑工程有限公司 | Side translocation preventing method in building translocation process |
| JP5247289B2 (en) * | 2008-08-06 | 2013-07-24 | 旭化成建材株式会社 | Rotating embedding method of bladed pile |
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Effective date of registration: 20170228 Address after: 200331 Gulang Road, Shanghai, Lane No. 415, Lane 6, No. Patentee after: SHANGHAI TONGNA CONSTRUCTION ENGINEERING QUALITY TESTING Co.,Ltd. Address before: 200092 Chifeng Road, room 65, No. 613, room Patentee before: SHANGHAI TONGHAO CIVIL ENGINEERING CONSULTING Co.,Ltd. |
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Effective date of registration: 20170331 Address after: 200092 room 1701-1704, building 63, Chifeng Road, Shanghai, Yangpu District, 31 Patentee after: SHANGHAI TONGHAO CIVIL ENGINEERING CONSULTING Co.,Ltd. Patentee after: SHANGHAI TONGNA CONSTRUCTION ENGINEERING QUALITY TESTING Co.,Ltd. Address before: 200331 Gulang Road, Shanghai, Lane No. 415, Lane 6, No. Patentee before: SHANGHAI TONGNA CONSTRUCTION ENGINEERING QUALITY TESTING Co.,Ltd. |
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Address after: 200092 rooms 1701-1704, building 31, No.63 Chifeng Road, Yangpu District, Shanghai Patentee after: SHANGHAI TONGHAO CIVIL ENGINEERING CONSULTING Co.,Ltd. Patentee after: Tongna testing & Certification Group Co.,Ltd. Address before: 200092 rooms 1701-1704, building 31, No.63 Chifeng Road, Yangpu District, Shanghai Patentee before: SHANGHAI TONGHAO CIVIL ENGINEERING CONSULTING Co.,Ltd. Patentee before: SHANGHAI TONGNA CONSTRUCTION ENGINEERING QUALITY TESTING Co.,Ltd. |
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