DE1759188C - Method for producing diaphragm walls - Google Patents

Description

35

The invention relates to a method for producing diaphragm walls, in which a slot is excavated essentially continuously by means of a bucket chain excavator.

When continuously making the slot by means of a bucket ladder excavator, one used previously a chassis moving forward on a track on the surface of the terrain, from which the Propulsion forces are transferred to the bucket chains in the slot via a support structure had to (German patent 743 141).

The support structure for introducing the propulsive force into the bucket chains takes over the To generate a sufficient contact pressure across the entire depth of the slot, a lot in the longitudinal direction of the slot Space to claim, so that there is always a large slot section in front of the already concreted part of the Diaphragm wall is occupied by the bucket chain excavator.

In addition, the production of deeper slots for building deeper-reaching diaphragm walls is not possible because here the introduction of sufficient propulsive forces into those extending over the entire depth of the slot Bucket chains no longer appear possible. Support structures for power transmission from one The chassis to the bucket chains would require even more space in the longitudinal direction of the slot or should be made so powerful that the handling of the entire device is practical is extremely difficult.

The invention therefore makes use of the teaching of a known device (French patent specification 1363 217) use in which the excavation by a vertically working chisel. the the guide for the chisel-forming box »t such the side walls of the protection are sealed, afterwards termination of a work fee of the dismantling device thereby a distance in Schhtzlangsnchrung corresponding to the working depth of the chisel it is assumed that there is a liquid level difference in front of and behind the said box Is produced that the degradation device due to of the hydrostatic pressure in the space hmter the vertical box pushes forward.

However, this known dismantling device cannot be moved continuously forwards, since no propulsive force is generated during the entire operating life of the M-'iPc1n viirVimc propulsion force. which sections corresponding to the Arbe.t-.iefe the bit ·, w.mickt, not for continuous ortrieb ouiu-t Accordingly, the & Förikrleisluiii- - rum in the diaphragm wall 1 proceeds at Ausu! mg of this known method is only slowly advancing. AuBe ₁ .Ion prepares the removal of the soil caused by: i!>. 'I skin soil with the known \ orriehtuiiu practically great difficulties because S hie of the slot sucked out and must be conveyed out of the Schiit / via the Tragerk-msiruktion for the vertically working chisel. If the excavated material does not open before then, even after the chisel has been shut down, the level difference required to move the device to generate the hydrostatic pressure can no longer be brought about, and the support structure is attached to the base: s slot blocked by the mining material, which can no longer be conveyed away.

The invention is therefore based on the object, also in the production of deep slots to enable the use of bucket chain excavators using hydraulic propulsion. "

The solution to this problem is, according to the invention, that a bucket chain excavator is provided Steel box, in which the returning run of the bucket chains is guided, against the side walls of the excavated slot filled with support fluid and sealed against its sole is so that within the slitter, in front of and behind the steel box separate, liquid-filled Spaces are formed, the liquid level in the liquid-filled space between the front end of the slot and the steel box opposite the liquid level in the liquid-filled space behind the steel box at least partially through the operation of the Bucket chains is kept lowered so that the bucket chain excavator of the hydrostatic pressure difference is continuously moved forward.

The invention thus enables the per se known manner of generating one on one The horizontal force acting on the hydrostatic path is now also continuous To take advantage of the forward movement of a bucket chain excavator, since the bucket chains in their entirety from the rear over its entire height constantly

. jn ^ «solve and promote. The bucket loudly1 den Bodejjgm « _thereby ^^

chains 4 are ^{screwed on w} f ^ * ropes 4 α that the ^ S ^ SV ^ t takes place at the SSaK A ^ sSngs.eispie. by means of leadership

"SS ^{01 1} huFc of sealing sheets 6, the by - enclosed _h K 3, forwardly open Stahlk""tenjuiii is _because hinterliegendcn space 8

Room 7 ^of ..J. ^int "^ _tI J _{nnti su} that the liquidity kit · liquid measure ^ g separated ^ so ^ ^ _{F; üssigkciis} .

mirror _of ^g _S chlitzes be lowered 1 ⁹ J ¹ J ₃ ^ ₈ mirror aes in space "lowering effect may be on the. As a result of a sol "^ _{11 evenly distributed}

- is it possible to

are under compressive forces, these compressive forces

due to the considerable conveying and pumping

performance of the bucket chains is maintained

can be used if during continuous

during operation, the excavation device through ground

must be carried out in which the

sealing of the steel box opposite the side ones

Walls chs slot causes difficulties, so

that this seal is deficient. A lounger

remains of degraded material on the sole of the xo

Slot and the malfunctions caused by it

are when exercising the procedure according to the invention

_dll ng not to worry about. ΛίΞε p

Also keep the constantly effective pressure forces Stanlkasten j ti i ^ ^^ _{β Jst} ^ _g , in the method according to the invention the bucket-15 propulsion force. _to advance continuously and

Excavator free of bending forces. For this ^Eim _l ^e . ^rkeUc .1! t _front- sided £ rdieich arbitrarily strong so (, round it is possible to achieve the bucket chain excavator in the bucket anu * optimal conveying capacity

., i / ontalrichtung very short, so that the / aht / wall concreting of the / 01 driven forehead * "." v * -.- id of the slot can follow at a short distance, ao at H According to an advantageous development of the mirror i,; «r ^ ns according to the invention, the liquid -... icgel in the liquid-filled room in front of the! Merkettenbagger are regulated in that ■ K Amount of liquid in this space over in the steel coast arranged openings can be added .. Based on the drawing, a Example of implementation of the method according to the Erfin-Jung explained in more detail. It represents i Hrilhitt

Stanl _{box on the} front side can be as strong as you want

optimal delivery rate achieved

to press on, aai.

* """" _Dcs propelling the liquid, ·, - ^ _zw eckmädig as high v-, e spiegc 9 aui ^^ _{g of GDL SchHtzes t,..}

in ^{there C} [ ^1U;? Bucket chains 4 start unloaded! u ten, so uaii ^ ^^ _{d operation of the} a r-

Uonnen. ^ "'

uncovered

_{Operation of the} one

stands. S.

manoeuvrable ^Vo ™ ^ _rketten 4 _{d> r} FlUssigkeitsspiegi! 9 Betner »ckτ -. _{eb & m drop sharply} , so came

ng explained in more detail. It continues, ΐ ■ “. vc-lockable opening 10 in the necessary. ^. i

Fig. 1 is a horizontal section through a bucket 30 through one ^x ". Liquid from space 8 .α

Afüh d Vfh to Malte again thm «rop.

Fig. 1 shows a horizontal section d kcttenbagger for carrying out the method according to of the invention and

F'.g. 2 is a schematic side view, drawn in section, of the bucket chain excavator according to FIG. li 1 id help i bucket chains

at TeEimerkettenbaggers 2 and the uc bucket chains 4 occurring loi-

ueineo

Bucket chains 4

tenagg g at ueineo _{den von eincm Porti; 1} .

The slot 1 is nui means of a right Eimerketten- 35 R "ktionsK _{Dadun: h} b _{is the} base of the crane off" ^au 'f _m ^ _kettenbagge rs 2 occurring due to end-face degradation on Vorbaggers 2 Friction Wi Fi I is tehmen contains drove ^ J ^^^ A

Baggers 2 lifted by the frontal Ab 1. As shown in FIG Bucket chain excavator 2 one with respect to a honzontale Section plane U-shaped steel box 3, which is somewhat narrow than the slot to be produced 1. 4 » The bucket chains 4 are arranged so that they are at the Front side of SchHtzes 1 from bottom to top

drove ^on J ^

interpreted

In addition, the lifting height of the gantry crane 11 can be. Refer to the drawings for directing the bucket- A 12.

1 sheet of drawings

Claims (2)

Patent claims: 1. Process for the production of diaphragm walls, in which a bottom slot is essentially continuous by means of a bucket chain excavator is excavated, characterized in that a steel box (3) provided on the bucket chain excavator (2) in which the returning run of the bucket chains xo is guided against the side walls of the excavated and the slot (1) filled with support fluid and sealed against its sole so that within the slot (1) in front of and behind the steel box (3) separate, liquid-filled spaces (7, 8) are formed, the liquid level (9) in the liquid-filled space (7) between the front end of the slot (1) and the Steel box (3) opposite the liquid level (9) in the liquid-filled space (8) behind the steel box (3) at least partially lowered in this way by the operation of the bucket chains (4) is held, daii the bucket chain excavator (2) from the hydrostatic pressure difference /. is continuously moved forward. 2. The method according to claim T, characterized in that the amount of liquid in the fluid-filled space (7 ^ between the frontal End of the slot (1) and the steel box (3) arranged over in the steel box ^ n (3) Openings (10) can be added.