Adjustable head prestress loading equipment for steel support and loading method of adjustable head prestress loading equipment

Abstract

The invention discloses adjustable head prestress loading equipment for a steel support and a loading method of the adjustable head prestress loading equipment, and the prestress loading equipment comprises a hoisting support seat, the top of the hoisting support seat is provided with a hoisting point for hoisting; the jack bracket is pivoted to the bottom of the hoisting support; the hydraulic jack is used for being arranged between the fixed part and the movable part of the movable head so as to apply prestress, and the hydraulic jack is arranged along the swing face perpendicular to the jack support and connected to the jack support; the driving piece is used for driving the jack bracket to swing and rotate and is connected to the bottom of the hoisting support; and the hydraulic box is used for driving the hydraulic jack to stretch out and draw back, the hydraulic box is connected to the bottom of the hoisting support, the hydraulic box is connected with the hydraulic jack through a hydraulic oil pipe, and the construction efficiency is improved by arranging the prestress loading equipment.

Description

Technical Field

[0001] The present invention relates to the technical field of building construction, and in particular to a prestressed loading device of an active head for a steel support and a loading method thereof. Background Art

[0002] In the existing foundation pit support process, steel supports are generally used in conjunction with movable heads to support the foundation pit. The movable head includes a fixed part and a movable part that is slidably inserted into the fixed part. Connecting ear plates are fixed at both ends of the fixed part and the movable part that are relatively far apart. The fixed part is connected to the steel support through the corresponding connecting ear plates, and the movable part is connected to the structure to be supported through the corresponding connecting ear plates. The jack is then placed between the ear plates of the fixed part and the movable part, stretched to apply prestress to improve the support effect. After the prestress is loaded, a block is connected between the fixed part and the movable part to lock the prestress, and then the jack is rotated. Since the steel supports are set at different elevations in the foundation pit, this prestressed loading process requires construction workers to constantly install and remove the rotating jacks and manually adjust the jacks, resulting in low construction efficiency and inaccurate prestress loading. Summary of the Invention

[0003] The purpose of the present invention is to overcome the defects of the prior art and provide a prestressed loading device for a steel support and a loading method thereof, integrating a hydraulic jack, a hydraulic box and a driving part on a lifting support, facilitating overall rapid turnover and improving construction efficiency.

[0004] To achieve the above-mentioned purpose, the technical solution adopted by the present invention is a prestressed loading device for a movable head of a steel support, comprising:

[0005] A lifting support, wherein a lifting point for lifting is provided on the top of the lifting support;

[0006] a jack stand pivotally connected to the bottom of the lifting support;

[0007] A hydraulic jack for applying prestressing force between the fixed portion and the movable portion of the movable head, wherein the hydraulic jack is arranged along a swing plane perpendicular to the jack stand and connected to the jack stand;

[0008] A driving member for driving the jack bracket to swing, the driving member being connected to the bottom of the lifting support;

[0009] A hydraulic box for driving the hydraulic jack to extend and retract, the hydraulic box is connected to the bottom of the lifting support, and the hydraulic box and the hydraulic jack are connected via a hydraulic oil pipe.

[0010] A further improvement of the prestressed loading device for the movable head of the steel support of the present invention is that two inverted U-shaped ear plates are connected to the bottom of the lifting support in parallel and at intervals, and the jack bracket is pivotally connected between the two first flange plates of the two inverted U-shaped ear plates.

[0011] A further improvement of the prestressed loading device for the movable head of the steel support of the present invention is that the number of the jack brackets and the hydraulic jacks are both two, and the other jack bracket is pivotally connected between the two second flange plates of the two inverted U-shaped ear plates.

[0012] A further improvement of the prestressed loading device for the movable head of the steel support of the present invention is that the jack bracket is a connecting plate, the bottom ends of the two connecting plates are connected to the hydraulic jacks, the top ends extend outward relative to each other and form two rotating shafts, and the two first flange plates and the two second flange plates are provided with through holes for the corresponding rotating shafts to rotate through.

[0013] A further improvement of the prestressed loading device for the movable head of the steel support of the present invention is that the driving part includes a winch, two hoisting ropes are wound around the winch, and the two hoisting ropes are respectively connected to the back sides of the two connecting plates. The two connecting plates are controlled to swing relative to or away from each other by winding or extending the hoisting ropes.

[0014] A method for prestressing a movable head for a steel support, comprising the steps of:

[0015] Step 1: Provide the above-mentioned prestressed loading device for the movable head of the steel support;

[0016] Step 2: Hoist the prestressed loading device above the movable head so that the extension and contraction direction of the hydraulic jack is parallel to the axial direction of the steel support;

[0017] Step 3: Use the driving part to control the swing of the jack bracket until the hydraulic jack is swung between the fixed part and the movable part of the movable head;

[0018] Step 4: Using a hydraulic box to control the extension of the hydraulic jack, prestressing the movable head until the design strength is reached;

[0019] Step 5: Connect the plug between the fixed part and the movable part to lock the prestress, use the hydraulic box to control the contraction of the hydraulic jack, and hoist the prestressed loading equipment to other movable heads.

[0020] Compared with the prior art, the advantages of the present invention are:

[0021] By integrating the hydraulic jack, hydraulic box and drive components on the lifting support, the overall rapid turnover is facilitated and the construction efficiency is improved. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the following briefly introduces the drawings required for use in the description of the embodiments. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0023] Figure 1 The figure is a schematic diagram of the use state of the movable head prestressing loading device for steel support of the present invention.

[0024] In the figure: 1. movable head; 2. lifting support; 3. lifting point; 4. hydraulic box; 5. hydraulic oil pipe; 6. driving part; 7. inverted U-shaped ear plate; 8. jack bracket; 9. hydraulic jack. DETAILED DESCRIPTION

[0025] The following describes the embodiments of the present invention through specific examples. Those skilled in the art will readily understand the other advantages and benefits of the present invention from the disclosure herein. The present invention may also be implemented or applied through various other specific embodiments, and the details in this specification may be modified or altered based on different viewpoints and applications without departing from the spirit of the present invention.

[0026] The following further describes in detail the prestressed loading device and loading method of the movable head for steel support of the present invention in conjunction with the accompanying drawings and specific embodiments.

[0027] See also Figure 1 As shown, the movable head prestressing loading device for steel support includes:

[0028] A lifting support 2, the top of which is provided with a lifting point 3 for lifting;

[0029] A jack bracket 8, the jack bracket 8 is pivotally connected to the bottom of the lifting support 2;

[0030] A hydraulic jack 9 for applying prestressing force between the fixed portion and the movable portion of the movable head 1, wherein the hydraulic jack 9 is arranged along a swing plane perpendicular to the jack support 8 and connected to the jack support 8;

[0031] A driving member 6 for driving the jack bracket 8 to swing, the driving member 6 being connected to the bottom of the lifting support 2;

[0032] A hydraulic box 4 is used to drive the hydraulic jack 9 to extend and retract. The hydraulic box 4 is connected to the bottom of the lifting support 2. The hydraulic box 4 and the hydraulic jack 9 are connected via a hydraulic oil pipe 5.

[0033] By integrating the hydraulic jack 9, the hydraulic box 4 and the driving component 6 on the lifting support 2, the overall rapid turnover is facilitated, thereby improving the construction efficiency.

[0034] Specifically, the jack bracket 8 is located at the bottom of one end of the lifting support 2, the hydraulic box 4 is located at the bottom of the other end of the lifting support 2, and the lifting point 3 is located in the middle of the top of the lifting support 2. When the lifting support 2 is in the lifting state, the lifting support 2 is in a horizontal state.

[0035] By arranging the jack bracket 8 and the hydraulic box 4 on both sides of the jack bracket 8, a balancing effect is achieved, thereby improving the hoisting stability and avoiding tilting when hoisting the hoisting support 2, which affects the positioning of the hydraulic jack 9.

[0036] Preferably, two inverted U-shaped ear plates 7 are connected to the bottom of the lifting support 2 in parallel and at intervals, and the jack bracket 8 is pivotally connected between the two first flange plates of the two inverted U-shaped ear plates 7 .

[0037] The two inverted U-shaped ear plates 7 provide a connection foundation for the jack bracket 8 .

[0038] Preferably, the number of the jack brackets 8 and the number of the hydraulic jacks 9 are both two, and the other jack bracket 8 is pivotally connected between the two second flange plates of the two inverted U-shaped ear plates 7 .

[0039] By providing two jack supports 8 and two hydraulic jacks 9 , prestressing loading can be performed faster and better.

[0040] Preferably, the jack bracket 8 is a connecting plate, the bottom ends of the two connecting plates are connected to the hydraulic jack 9, the top ends extend outward relative to each other and form two rotating shafts, and the two first flange plates and the two second flange plates are provided with through holes for the corresponding rotating shafts to rotate through.

[0041] The connection plate is provided to provide a connection basis for the hydraulic jack 9 without affecting the extension and contraction of the hydraulic jack 9 . Both the connection plates can swing around the corresponding rotation axis, thereby facilitating the adjustment of the position of the hydraulic jack 9 .

[0042] Preferably, the driving member 6 includes a winch having two hoisting ropes wound thereon. The two hoisting ropes are respectively connected to the back sides of the two connecting plates. The two connecting plates are controlled to swing relative to or away from each other by winding or extending the hoisting ropes.

[0043] By extending the hoisting rope, the two connecting plates will swing relative to each other due to their own gravity, that is, they will move closer to each other. By rewinding the hoisting rope, the two connecting plates can be pulled to swing away from each other, that is, they will move away from each other. Therefore, the position of the hydraulic jack 9 can be adjusted by only controlling the rewinding length of the hoisting rope.

[0044] A method for prestressing a movable head for a steel support, comprising the steps of:

[0045] Step 1: Provide the above-mentioned prestressed loading device for the movable head of the steel support;

[0046] Step 2: Hoist the prestressed loading device above the movable head 1 so that the extension and contraction direction of the hydraulic jack 9 is parallel to the axial direction of the steel support;

[0047] Step 3: Use the driving member 6 to control the jack bracket 8 to swing until the hydraulic jack 9 is swung between the fixed part and the movable part of the movable head 1;

[0048] Step 4: Use the hydraulic box 4 to control the extension of the hydraulic jack 9 to apply prestress to the movable head 1 until the design strength;

[0049] Step 5: Connect the plug between the fixed part and the movable part to lock the prestress, use the hydraulic box 4 to control the contraction of the hydraulic jack 9, and hoist the prestressed loading equipment to other movable heads 1.

[0050] It should be noted that the structures, proportions, sizes, etc. illustrated in the drawings of this specification are only used to match the contents disclosed in the specification for understanding and reading by those familiar with this technology, and are not used to limit the conditions for implementation of the present invention. Therefore, they have no substantial technical significance. Any modification of the structure, change in the proportional relationship, or adjustment of the size should still fall within the scope of the technical content disclosed by the present invention without affecting the efficacy and purpose that can be achieved by the present invention. At the same time, terms such as "upper", "lower", "left", "right", "middle" and "one" quoted in this specification are only for the convenience of description and are not used to limit the scope of implementation of the present invention. Changes or adjustments in their relative relationships should also be regarded as the scope of implementation of the present invention without substantially changing the technical content.

[0051] The above description is merely a preferred embodiment of the present invention and does not constitute any form of limitation to the present invention. Although the present invention has been disclosed as a preferred embodiment as above, it is not intended to limit the present invention. Any technician familiar with this profession can make some changes or modifications to equivalent embodiments of the technical contents disclosed above without departing from the scope of the technical solution of the present invention. However, any simple modifications, equivalent changes and modifications made to the above embodiments based on the technical essence of the present invention without departing from the content of the technical solution of the present invention are still within the scope of the technical solution of the present invention.

Claims

1. A prestressed loading device for a movable head of a steel support, characterized in that: include: A lifting support, wherein a lifting point for lifting is provided on the top of the lifting support; a jack stand pivotally connected to the bottom of the lifting support; A hydraulic jack for applying prestressing force between the fixed portion and the movable portion of the movable head, wherein the hydraulic jack is arranged along a swing plane perpendicular to the jack stand and connected to the jack stand; A driving member for driving the jack bracket to swing, the driving member being connected to the bottom of the lifting support; A hydraulic box for driving the hydraulic jack to extend and retract, the hydraulic box is connected to the bottom of the lifting support, and the hydraulic box and the hydraulic jack are connected via a hydraulic oil pipe.

2. The prestressed loading device for a movable head of a steel support according to claim 1, characterized in that: The bottom of the lifting support is connected to two inverted U-shaped ear plates in parallel and at intervals, and the jack bracket is pivotally connected between the two first flange plates of the two inverted U-shaped ear plates.

3. The prestressed loading device for a movable head of a steel support according to claim 2, characterized in that: There are two jack brackets and two hydraulic jacks, and another jack bracket is pivotally connected between the two second flange plates of the two inverted U-shaped ear plates.

4. The prestressed loading device for a movable head of a steel support according to claim 3, characterized in that: The jack bracket is a connecting plate, the bottom ends of the two connecting plates are connected to the hydraulic jacks, the top ends extend outward relative to each other and form two rotating shafts, and the two first flange plates and the two second flange plates are provided with through holes for the corresponding rotating shafts to rotate through.

5. The prestressed loading device for a movable head of a steel support according to claim 4, characterized in that: The driving member includes a winch, on which two hoisting ropes are wound. The two hoisting ropes are respectively connected to the back sides of the two connecting plates. The two connecting plates are controlled to swing relative to or away from each other by winding or extending the hoisting ropes.

6. A method for prestressing a flexible head for a steel support, characterized in that: Including steps: Step 1: Provide the prestressed loading device for the movable head of the steel support according to claim 1; Step 2: Hoist the prestressed loading device above the movable head so that the extension and contraction direction of the hydraulic jack is parallel to the axial direction of the steel support; Step 3: Use the driving part to control the swing of the jack bracket until the hydraulic jack is swung between the fixed part and the movable part of the movable head; Step 4: Using a hydraulic box to control the extension of the hydraulic jack, prestressing the movable head until the design strength is reached; Step 5: Connect the plug between the fixed part and the movable part to lock the prestress, use the hydraulic box to control the contraction of the hydraulic jack, and hoist the prestressed loading equipment to other movable heads.

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