DD200477A1 - DEVICE FOR INTRODUCING UNDERWATER CONCRETE - Google Patents

Abstract

The invention relates to a device for introducing underwater concrete in uninterrupted flow by means of a concreting pipe. The invention aims to reduce the susceptibility of the device and exclude Fehlbetonierungen. The manufacturing cost of the device should be lowered and the operation much easier. By the invention, the lifting of the concreting pipe is to be achieved in accordance with the progress in filling the concrete pipe at a constant immersion depth in the already introduced concrete and at a jeweligen the hydrostatic ratios adjusting filling height of the concrete in the concreting. According to the invention, a buoyancy body above the mouth of the concreting pipe is arranged in the height of the intended immersion depth of the concreting pipe in the introduced concrete on the outer wall of the concreting pipe. The concreting pipe is raised by the buoyancy of the buoyancy body floating on the inserted concrete in accordance with the progress of filling the concreting pipe. The concreting pipe can be used for the execution of all foundation works under water. Fig.1

Description

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Device for introducing underwater concrete Field of application of the invention

Dia invention "relates to a device for introducing underwater concrete in uninterrupted flow by means of a concreting pipe

Characteristic of the known technical solutions

Purely the perfect execution of the underwater concreting is the constant outflow of the concrete from the concrete pipe an important prerequisite «. Depending on the height of the water column, this constant outflow of concrete from the concreting pipe over the already introduced concrete is ensured at a certain ratio. 3 Immersion depth of the concreting pipe into the concrete to the filling level in the concreting pipe * It is known from practice that the concreting pipe has a large concrete supply to fill and regulate the outflow of the concrete by raising and lowering the concreting pipe. This has the disadvantage that the flow of the concrete is unsteady * For larger dumping heights or if the immersion depth au is low when concrete pipe is tightened the concrete column so suddenly start moving that when sinking the concreting the plätaiiche leakage of the entire content is not stopped "In DE-PS 111342" a device for introducing underwater concrete is described in which the lower side openings provided with the end of the concreting pipe with a filling stopper or »with a Rillstopfen and a pipe slide a throttle device or a valve, Das Concrete pipe, the filling plug and the pipe slide can be raised depending on each other by lifting and lowered * This should be done so that in the concreting above the on

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The movement of the throttling device or the EetcnierrohrsG is übar controlled on the Bctcniarrciir arranged cells that scan the concrete surface in the concrete pipe * They act on the corresponding hoist, that the concrete flow is controlled automatically when pulling. This controlled outflow of concrete is with the added expense of the tax ^! .xrag3 ~ and Ragaltacixnik and connected by dan use of an additional hoist for the throttle device * Another fact of the device is the fact that the concrete column is kept constant in the concreting tube, thereby disregarding the changing hydrostatic conditions in concreting progress * Furthermore, a Control of the immersion depth of the concrete pipe is not possible, so that false concrete is not excluded.

By DS-OS 2829493 a further arrangement for the introduction of underwater concrete has become known. On a liftable and lowerable condenser several outside to the mouth belonging to a Ultraschallneßvorrichtung transmitters are arranged, A Mündungsmeßwertgeber indicates the proper work of the concreting when the concrete level has exceeded the Mündungsmeßwertgeber. It indicates whether the concrete level peak has not reached or has reached the immersion depth gauge »The concrete pipe is raised when the concrete level sensor reaches the immersion depth sensor and is lowered when the concrete level peak is below the orifice level sensor. J'ehlbetonierungen are excluded as a result of an uncontrollably ble pulling out of the concreting from the already introduced concrete. With the increased effort for the measuring devices and the control technology increases their susceptibility and thus the susceptibility of the entire arrangement »

Purpose of the invention

The invention aims to reduce the susceptibility of the device for introducing underwater concrete and Pehlbetonierungej

igen

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lowers and the operation much easier *

Essence of the invention

The object of the invention is to provide the device for introducing underwater concrete so that the ne ⁿ oen of the concrete pipe according to the Betonierfortschrittes with constant immersion depth in the already introduced concrete and at the respective hydrostatic conditions adjusting Püllhöhe

\ Λ <^: Ο α ~ Ό W 'Vü * 3 J-44A JU'ς? V WJ.AJ. ^ J. -i. -WA-ii. vAi X5j.Wia ν Π U · JU β-According to the invention, a buoyant body above the mouth of Betoniarrohres at the level of the intended immersion depth of Betoniarrohrss is arranged on the outer wall of the concreting _a the immersion depth is chosen so that the S ⁵ Ii eßwi the st and The buoyancy of the buoyant body floating in the water reduces the effective dead load of the telescoping concreting tube to such a low value that the pressing against the base of the buoyant body ascending Concrete raises the concreting pipe at the speed corresponding to the concrete progress »The fill level in the concreting pipe adjusts itself to the concrete during a concreting process according to the hydrostatic conditions and according to the condition of the concrete r preferred embodiment, the buoyancy body is arranged concentrically to the concreting * Bas volume of the buoyant body is kept so large that the weight of the displaced water is slightly smaller than the weight of the concreting pipe, so that the buoyancy sinks only a small amount in the introduced concrete » Pur the application at greater depths, the concreting tube consists of telescopically connected Rohrschüssenj which are each connected to a buoyant body, so that when Zusaimnenschieben the pipe sections the? Lächenpressung of the concrete at the base of the lowermost buoyancy body is not significantly increased * For raising and lowering are on Concrete pipe b3Wj fixed symmetrically to ropes on the lower boom., To ensure a constant filling height for the concrete during the sewer

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In order to achieve a complete concreting process, a fixed bulk tube with a hopper is telescopically connected to the concreting tube «

If concretes of variable consistency are introduced, it may be necessary to work with variable immersion depth. Since * - to the buoyancy body is axially displaceable on the concreting. attached pipe, or on the buoyancy Betonierrohrenden different lengths are attachable.

exemplary

The invention will be explained with reference to the ünterwaerberbierierens a bored pile.

FIG. 1 shows the beginning of the concreting work with a device according to the invention. The concreting here ordered from the hopper 6, the interconnected pipe sections 11 and 12, the bulk tube 5 ₅ the concreting 2 and the buoyancy body 1 and the two cables 3 to. Holding, -Pulling and pulling the concreting pipe 2, The concreting device is immersed in the groundwater 7 and stands on the bottom hole 8, By the buoyancy body 1, the concreting 2 has only a small dead load, Thus, at the beginning of the Schüttverganges by the pressure The concrete column 2 remains from the first moment of the debris = immersed in the rising concrete 9 of the bored pile, so that a dissolution of the concrete 9 by free exit in the groundwater 7 is excluded,

Reached the rising concrete 9, the base 10 of the buoyancy body 1, the 3etonierrohr 2 is raised evenly with the rising concrete 9. Due to the low effective load of the base 10 on the concrete 9 of the buoyancy body 1 decreases only slightly in the concrete and during the entire concreting a constant immersion depth A is inevitably present. The immersion depth A is determined according to the consistency of the concrete to be poured 9 and the concreting tube diameter to a size that ensures the maintenance of a perfect concrete quality without halting concrete flow, The Betoniervorsana: wird bis r.nm An

blow of the buoyancy body 1 to the pipe section 11 of the bulk tube 5 continued «Pulling on the ropes 3, the achievement of the stop can be determined. If there is no control, then the concrete flow comes by rising of the concrete 9 on the buoyancy body 1 and thus increasing the immersion depth of the concreting tube 2 sum standing. The concreting pipe 2 is shortened by disassembly of the pipe section 12 according to su. At the same time, the pulling of the pipe thread 4 and the removal of the upper pipe section of the pipe thread 4 takes place. »In Pigur 2, the state after the dismantling of the pipe section 12 is shown with continued concreting * Via the cables 3, A ο α d nrfi'rt r? -Ί ω Wi-yViino · ποα ilnfitri ohsVr-rriars 1 <? c>'h ~ r' 1 pi r.'nto Ήρΐηπί f> r »

can be controlled by hand in the rising concrete 9 * This can also be an unintended, particularly stiff delivery of concrete flow in stagnant concrete flow *

Claims (5)

-fc-Li ilia I inventors pr och 1. A device for introducing underwater concrete in uninterrupted flow by means of a concreting tube, characterized in that a buoyant body (1) above the mouth of the Eetonierrohres (2) in the amount of immersion depth provided in the introduced concrete on the outer wall of the concreting pipe (2) is arranged . 2 * Gate direction for the insertion of underwater concrete according to point 1,. characterized by; in that the buoyancy body (1) is arranged concentrically with respect to the concreting pipe (2), and that water displaced by the buoyancy body (1) is somewhat lighter than the weight of the concreting pipe (2). 3. A device for introducing underwater concrete according to item 1 and 2, characterized in that the concreting pipe (2) consists of telescopically interconnected pipe sections, which are each provided with a buoyancy body, 4 »device for introducing underwater concrete according to points 1 to 3 ) characterized in that the concreting pipe (2) or» at the bottom of the pipe section symmetrically ropes (3) are attached, 5. "device sum introducing underwater concrete according to the points 1 to 4, characterized in that a fixed bulk tube (5) with hopper (6) with the concreting tube (2) is telescopically connected. 5, device according to the points 1 to 5 », characterized in that the buoyancy body (1) is axially displaceable on the concreting pipe (2) or on the buoyancy body (i) concreting ends of different lengths are attached. for 1 page drawings