Hydraulic static jacking support for pulling out long pile casing

Abstract

The utility model provides a hydraulic static jacking support for pulling out a long pile casing, which comprises a positioning support, a jacking support arranged on the positioning support in a sliding manner along the direction of a plumb bob, and a jacking power device used for driving the jacking support to slide, and the jacking power device is arranged at the bottom of the jacking support. A clamping hoop assembly used for clamping the steel casing is further arranged on the jacking support, vibration can be relieved, and therefore the pile forming quality is guaranteed while concrete loss is avoided.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of bridge engineering construction, in particular to a hydraulic static jacking support for long casing pulling. BACKGROUND

[0002] When pile foundation is constructed in silt layer by rotary drilling, the method of driving into steel casing and then passing through silt layer is often used to ensure pile quality due to the easy hole collapse. For deep silt layer, the length of steel casing to be driven is very large, and the steel casing is usually pulled out after the completion of pile foundation construction for recycling. Currently, the method of crane + pile hammer clamping steel casing vibration pulling is mainly used. In practice, this method needs to liquefy the silt on the surface of the steel casing for vibration pulling of the steel casing, and thus the silt on the surface of the pile hole is invaded by concrete, resulting in concrete waste and even affecting the pile quality.

[0003] Therefore, the skilled in the art need to improve the pulling method of long casing to overcome the above technical problems. CONTENT OF THE UTILITY MODEL

[0004] The main purpose of the present application is to provide a hydraulic static jacking support for long casing pulling, which adopts the construction process of driving into long casing to pass through deep silt layer, rotary drilling, pile foundation pouring, hydraulic static jacking support pulling casing (before concrete initial setting), and pile forming, so as to reduce vibration and avoid concrete loss while ensuring pile quality.

[0005] In order to achieve the above purpose, in the first aspect, the present application provides a hydraulic static jacking support for long casing pulling, which comprises a positioning support, a jacking support slidingly arranged on the positioning support along the plumb direction, a jacking power device for driving the jacking support to slide, the jacking power device being arranged at the bottom of the jacking support, and a clamping hoop assembly arranged on the jacking support for clamping the steel casing.

[0006] Optionally, the clamping hoop assembly comprises a first hoop and a second hoop, and the first hoop is detachably connected with the second hoop.

[0007] Optionally, the jacking power device is a jack.

[0008] Optionally, the jacking support and the positioning support are both spliced by I-beams.

[0009] Optionally, the end of the jacking support slides in the I-beam groove of the positioning support.

[0010] Optionally, a plurality of inclined braces are fixedly arranged on the jacking support, and the first hoop and the second hoop are respectively fixedly connected with the inclined braces.

[0011] Optionally, the jacking power device has a plurality of jacking power devices corresponding to the diagonal braces one by one, and the jacking power device is in abutment with the diagonal brace.

[0012] Compared with the prior art, the hydraulic static jacking support for long casing pulling out has the beneficial effects that the influence of vibration pulling out of the steel casing on the pile foundation quality and concrete overconsumption and waste is solved, the casing is pulled out through the static hydraulic jacking mode, the pile forming quality is guaranteed, and the construction cost is lower than that of vibration pulling out. BRIEF DESCRIPTION OF DRAWINGS

[0013] The drawings constituting a part of this application are used to provide a further understanding of the application, so that other features, objects and advantages of the application become more apparent.

[0014] Fig. 1 is a schematic view of the utility model;

[0015] Fig. 2 is a schematic view of the jacking support.

[0016] Wherein: 1, positioning support, 2, jacking support, 3, first hoop, 4, second hoop, 5, steel casing; 6, diagonal brace; 7, jack. DETAILED DESCRIPTION

[0017] In order to make the person skilled in the art better understand the present application, the technical solutions in the embodiments of the present application will be described clearly and completely below with reference to the drawings in the embodiments of the present application.

[0018] It should be noted that the terms "first", "second" and the like in the specification and claims of the present application and the above drawings are used to distinguish similar objects, and do not necessarily indicate a specific order or sequence. It should be understood that the data thus used can be interchanged under appropriate circumstances, so that the embodiments of the present application described herein can be implemented. In addition, the terms "include" and "have" and any variations thereof are intended to cover non-exclusive inclusion, for example, a process, method, system, product or device including a series of steps or units need not be limited to those steps or units clearly listed, but can include other steps or units not clearly listed or inherent to these processes, methods, products or devices.

[0019] In the present application, the terms "upper", "lower", "left", "right", "front", "back", "top", "bottom", "inner", "outer", "middle", "vertical", "horizontal", "transverse", "longitudinal" and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings. These terms are mainly used to better describe the present application and its embodiments, and are not intended to limit the indicated devices, elements or components to have a specific orientation, or to be constructed and operated in a specific orientation.

[0020] In addition, in addition to indicating the orientation or positional relationship, the above-mentioned partial terms may also be used to indicate other meanings, for example, the term "upper" may also be used to indicate a certain dependent relationship or connection relationship in some cases. For those skilled in the art, the specific meaning of these terms in the present application can be understood according to the specific situation.

[0021] In addition, the meaning of the term "a plurality of" should be two and more than two.

[0022] It should be noted that the embodiments in the present application and the features in the embodiments can be combined with each other without conflict. The present application will be described in detail below with reference to the drawings and in combination with the embodiments.

[0023] When the pile foundation is constructed in the silt layer by the rotary drilling method, the steps of the process are as follows:

[0024] (1) The inner diameter of the steel casing is processed to be the pile diameter + 0.2m, and the length is matched with the thickness of the silt layer, and the exposed original ground is 0.3m and penetrates the silt layer;

[0025] (2) First, the steel casing is lowered by the vibration hammer, and after the vibration is completed, it is reviewed in time to ensure the verticality and depth of the casing;

[0026] (3) The rotary drilling method is used to drill a hole in the long casing; after the hole is drilled and the acceptance is passed, the pile foundation concrete pouring operation is carried out;

[0027] (4) After the concrete pouring is completed, before the initial setting of the concrete, the hydraulic static jacking support is used for the casing pulling-out construction.

[0028] The static hydraulic jacking support in the present application is designed for step four, and the specific structure is as follows:

[0029] As shown in Figs. 1-2 A hydraulic static jacking support 2 for long casing pulling-out, comprising a positioning support 1, a jacking support 2 slidingly arranged on the positioning support 1 along the plumb direction, a jacking power device for driving the jacking support 2 to slide, the jacking power device is arranged at the bottom of the jacking support 2, and the jacking support 2 is further provided with a clamping hoop assembly for clamping the steel casing 5.

[0030] In the specific operation, the steel casing 5 is ringed by the clamping hoop, and then the jack 7 is vertically jacked for one stroke, and the operation is repeated until the steel casing 5 is completely pulled out, thereby realizing static pulling out and avoiding poor piling effect caused by vibration pulling out.

[0031] Preferably, the clamping hoop assembly comprises a first hoop 3 and a second hoop 4, and the first hoop 3 is detachably connected with the second hoop 4.

[0032] Preferably, the jacking power device is a jack 7.

[0033] In order to ensure the overall strength and convenient processing, the jacking support 2 and the positioning support 1 are both spliced by I-beams, and in order to ensure the inclination when the casing is pulled out, the end of the jacking support 2 is slidably located in the I-beam groove of the positioning support 1.

[0034] In order to ensure the strength and facilitate uniform distribution of the jacking force of the jacking power device, a plurality of inclined braces 6 are fixedly arranged on the jacking support 2, the first hoop 3 and the second hoop 4 are respectively fixedly connected with the inclined braces 6, the jacking power device has a plurality of jacking power devices, the plurality of jacking power devices correspond to the inclined braces 6 one by one, and the jacking power device is in abutment with the inclined brace 6.

[0035] The above is only the preferred embodiment of the present application and is not used to limit the present application. For those skilled in the art, the present application can have various changes and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. A hydrostatic jacking support for long casing pull, characterized by, The jacking device comprises a positioning support, a jacking support slidingly arranged on the positioning support along the plumb direction, and a jacking power device for driving the jacking support to slide, wherein the jacking power device is arranged at the bottom of the jacking support, and a clamping hoop assembly for clamping the steel casing is further arranged on the jacking support.

2. A hydrostatic jacking support for the removal of long casings as claimed in claim 1 wherein: The clamping hoop assembly comprises a first hoop and a second hoop, and the first hoop is detachably connected with the second hoop.

3. A hydrostatic jacking support for the removal of long casings as claimed in claim 1 wherein: The jacking power device is a jack.

4. A hydrostatic jacking support for the removal of long casings as claimed in claim 1 wherein: The jacking support and the positioning support are both spliced by I-beams.

5. A hydrostatic jacking support for the pull of a long pile, according to claim 4, characterized in that: The end of the jacking support is slidingly arranged in the I-beam groove of the positioning support.

6. A hydrostatic jacking system for the removal of long casings as defined in claim 2, wherein: A plurality of inclined braces are further fixedly arranged on the jacking support, and the first hoop and the second hoop are respectively fixedly connected with the inclined braces.

7. A hydrostatic jacking support for the pull of a long pile, according to claim 6, characterized in that: The jacking power device has a plurality of jacking power devices, and each of the plurality of jacking power devices corresponds to an inclined brace, and the jacking power device and the inclined brace are in contact.

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