Jack counter-force device for sinking well through pressure sinking method

Abstract

The jack counter-force device comprises a steel wire rope, a ring beam, a pulley and a center hole jack, a plurality of brackets are annularly arranged on the outer side of the wall of the open caisson, and the ring beam is arranged around the wall of the open caisson; the pulleys are installed on the top of the ring beam corresponding to the brackets, and the center hole jack is installed on the outer side of the ring beam. The open caisson sinking device has the advantages that the corbel arranged on the wall of an open caisson is pulled through the steel wire rope so as to control sinking of the open caisson, the bottom end of the steel wire rope is pulled through the center hole jack on the ground, the adverse effect of a soil layer on the steel wire rope is eliminated through actively-applied downward pressure, sinking of the open caisson is guided, passive sinking is changed into active sinking, and the sinking efficiency is improved. The construction efficiency is accelerated.

Description

Technical Field

[0001] The utility model relates to the technical field of caissons, and in particular comprises a jack reaction force device for caissons using a pressure sinking method. Background Art

[0002] With the development of urban space and the continuous improvement and perfection of construction technology, the development of underground multi-story space is increasing, and the application of caisson in enclosure structure is becoming more and more extensive. Affected by the surrounding soil layer, the caisson is prone to excessive friction and difficulty in sinking in the final sinking stage.

[0003] The jacks of the existing pressure sinking caisson reaction force system are all placed on the brackets. Every time the jack is retracted, the on-site construction personnel need to climb onto the caisson to make adjustments, which is inconvenient. In addition, the movement of personnel on the top of the caisson also affects the force of the caisson. Therefore, a new jack reaction force device is urgently needed to overcome the above problems. Utility Model Content

[0004] The utility model aims to overcome the deficiencies in the prior art and provide a jack reaction force device for a caisson using a pressure sinking method.

[0005] The jack reaction device for the caisson using the pressure sinking method comprises: a steel wire rope, a ring beam, a pulley and a through-hole jack. A plurality of brackets are provided in a circumferential direction on the outer side of the caisson wall, and the ring beam is arranged around the caisson wall; a plurality of pulleys are installed on the top of the ring beam corresponding to the brackets, and the through-hole jack is installed on the outer side of the ring beam;

[0006] One end of the wire rope is anchored on the bull leg, and the other end extends downward to the pulley and then turns to extend horizontally and passes through the through-hole jack. The end of the wire rope passing through the through-hole jack is fixedly connected with an anchor, and the top of the through-hole jack is supported on the anchor.

[0007] Preferably, a mounting groove is opened on the ring beam at a position corresponding to the corbel, the pulley is installed in the mounting groove, a steel bar is passed through the center of the pulley, and the pulley rotates around the steel bar; a pre-embedded corrugated pipe is buried in the ring beam, one end of the pre-embedded corrugated pipe is connected to the mounting groove, and the other end is connected to the through-core jack, and the wire rope turns at the pulley and extends to the through-core jack through the pre-embedded corrugated pipe.

[0008] Preferably, a pedestal is provided on the outer side of the ring beam, and the top surface of the pedestal is lower than the top surface of the ring beam; a through-hole jack is horizontally placed on the pedestal, and one end of the through-hole jack is fixed on the outer side surface of the ring beam.

[0009] Preferably, the bottom of the ring beam is buried below the ground, and a counterweight is provided on the ring beam.

[0010] Preferably, a through hole is vertically provided on the corbel, one end of the wire rope extends from the through hole to the top of the corbel and is fixedly connected with an anchor plate.

[0011] The beneficial effects of the utility model are:

[0012] 1) The utility model controls the sinking of the caisson by pulling the brackets arranged on the wall of the caisson with a steel wire rope, and the bottom end of the steel wire rope is pulled by a through-hole jack on the ground, and the adverse effect of the soil layer on it is eliminated by the actively applied downward pressure, thereby leading the sinking of the caisson, changing passive sinking into active sinking, and accelerating construction efficiency.

[0013] 2) The utility model repeatedly pulls the wire rope through the repeated support and retraction of the through-hole jack. When making adjustments, it is only necessary to reinstall the anchors on the ground. Therefore, there is no need for construction workers to climb onto the caisson to make adjustments, which is convenient for construction, and the adjustment process will not affect the stress of the caisson.

[0014] 3) The steel bracket, anchor plate, anchor, wire rope, pulley and through-hole jack in the utility model can be recycled and reused after the construction is completed, thereby reducing the construction cost. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 The cross-sectional view of the jack reaction device used for the pressure sinking method caisson;

[0016] Figure 2 It is a top view of the jack reaction device used for the pressure sinking caisson.

[0017] Explanation of the reference numerals in the accompanying drawings: caisson wall 1, corbel 2, steel wire rope 3, anchor plate 4, ring beam 5, pulley 6, steel bar 7, through-hole jack 8, embedded corrugated pipe 9, anchor 10, cap 11, counterweight 12. DETAILED DESCRIPTION

[0018] The utility model is further described below in conjunction with the embodiments. The description of the following embodiments is only used to help understand the utility model. It should be pointed out that for ordinary people in this technical field, the utility model can also be modified in some ways without departing from the principle of the utility model, and these improvements and modifications also fall within the scope of protection of the claims of the utility model.

[0019] As an example, Figure 1 and Figure 2 As shown, the jack reaction device for the caisson by the pressure sinking method comprises: a steel wire rope 3, a ring beam 5, a pulley 6 and a through-hole jack 8. A plurality of brackets 2 are provided in a circumferential direction on the outer side of the caisson wall 1. The ring beam 5 is a reinforced concrete component, and the ring beam 5 is arranged around the caisson wall 1.

[0020] Several pulleys 6 are installed on the top of the ring beam 5 corresponding to the corbels 2, and the through-core jack 8 is installed on the outside of the ring beam 5; specifically, a mounting groove is opened on the ring beam 5 at the position corresponding to the corbel 2, and the pulley 6 is installed in the mounting groove. A steel bar 7 is passed through the center of the pulley 6. The steel bar 7 is a full-length steel bar of the ring beam. The steel bar 7 passes through the pulley 6, and the pulley 6 is fixed in the groove of the ring beam 5. The pulley 6 rotates around the steel bar 7; a pre-buried corrugated pipe 9 is embedded in the ring beam 5, and one end of the pre-buried corrugated pipe 9 is connected to the mounting groove, and the other end is connected to the through-core jack 8. In this embodiment, the plane where the pulley 6 rotates is vertical and passes through the center of the caisson, and the pre-buried corrugated pipe 9 and the through-core jack 8 are both arranged perpendicular to the caisson wall 1.

[0021] A cap 11 is provided on the outer side of the ring beam 5 , and the top surface of the cap 11 is lower than the top surface of the ring beam 5 ; a through-hole jack 8 is horizontally placed on the cap 11 , and one end of the through-hole jack 8 is fixed on the outer side of the ring beam 5 .

[0022] A through hole is vertically provided on the corbel 2, and one end of the steel wire rope 3 extends from the through hole to the top of the corbel 2 and is fixedly connected to the anchor plate 4. One end of the steel wire rope 3 is anchored on the corbel 2 and the anchor plate 4, and the other end extends downward to the pulley 6 and then extends horizontally, and passes through the pre-buried corrugated pipe 9 from the outside of the ring beam 5, passes through the through-core jack 8, and the end of the steel wire rope 3 passing through the through-core jack 8 is fixedly connected to the anchor 10, and the end of the through-core jack 8 is supported on the anchor 10.

[0023] The main body of the ring beam 5 is buried underground, and the top is exposed on the ground. A counterweight 12 is provided on the ring beam 5, and the counterweight 12 presses on the ring beam 5 to prevent the ring beam 5 from being pulled out.

[0024] When this jack reaction force device for the pressure sinking caisson is in use, the anchor 10 is supported by the through-hole jack 8 to pull one end of the wire rope 3, and the wire rope 3 converts the tension it receives into pressure to act on the corbel 2, and is transmitted to the caisson to sink the caisson; the through-hole jack 8 applies tension to the wire rope 3 by pushing the anchor 10, and the through-hole jack 8 retracts after a stroke, releases the anchor 10 from the wire rope 3 and moves to the top of the jack, and fixes the wire rope 3 again. After the anchor 10 is re-fixed, the through-hole jack 8 continues to push until the caisson sinks into place.

Claims

1. A jack reaction device for a caisson using a pressure sinking method, characterized in that: include: Steel wire rope, ring beam, pulley and through-core jack, several brackets are arranged in a circumferential direction on the outer side of the caisson wall, and the ring beam is arranged around the caisson wall; several pulleys are installed on the top of the ring beam corresponding to the brackets, and the through-core jack is installed on the outer side of the ring beam; One end of the wire rope is anchored on the bull leg, and the other end extends downward to the pulley and then turns to extend horizontally and passes through the through-hole jack. The end of the wire rope passing through the through-hole jack is fixedly connected with an anchor, and the top of the through-hole jack is supported on the anchor.

2. The jack reaction device for a caisson using a pressure sinking method according to claim 1, characterized in that: An installation groove is opened on the ring beam at the position corresponding to the corbel, and the pulley is installed in the installation groove. A steel bar is passed through the center of the pulley, and the pulley rotates around the steel bar. A pre-buried corrugated pipe is buried in the ring beam, one end of the pre-buried corrugated pipe is connected to the installation groove, and the other end is connected to the through-core jack. After the wire rope turns at the pulley, it extends to the through-core jack through the pre-buried corrugated pipe.

3. The jack reaction force device for a caisson using a pressure sinking method according to claim 1, characterized in that: A cap is arranged on the outer side of the ring beam, and the top surface of the cap is lower than the top surface of the ring beam; a through-hole jack is horizontally placed on the cap, and one end of the through-hole jack is fixed on the outer side surface of the ring beam.

4. The jack reaction force device for a caisson using a pressure sinking method according to claim 1, characterized in that: The bottom of the ring beam is buried below the ground, and a counterweight is provided on the ring beam.

5. The jack reaction force device for a caisson using a pressure sinking method according to claim 1, characterized in that: A through hole is vertically arranged on the corbel, one end of the wire rope extends from the through hole to the top of the corbel and is fixedly connected with an anchor plate.

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