Construction device suitable for static load test of self-stabilization type foundation pit supporting structure
By designing a static load test construction device for self-steady foundation pit support structure, the outer sleeve is connected to the oblique rigid body and the enclosure structure, efficient and convenient load-bearing capacity detection is achieved, solving the problems of cumbersome testing process and uncontrollable welding quality in the prior art.
Patent Information
- Application Number
- CN202421312602.6
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-06-11
- Publication Date
- 2025-03-11
- Estimated Expiration
- 2034-06-11
AI Technical Summary
When the prior art detects the bearing capacity of the oblique rigid parts of the self-steady foundation pit support structure, the rigid parts need to be cut off for inspection, resulting in uncontrollable welding quality, and the inspection needs to be completed for the construction of the enclosure structure, resulting in delayed and cumbersome construction.
A static load test construction device suitable for self-steady foundation pit support structure is designed. The outer sleeve is connected to the construction oblique rigid body through the outer sleeve, and the outer sleeve is connected to the ring beam or enclosure pile to achieve the reaction frame function, without the need for additional counterweight blocks, simplifying the construction process.
The device does not need to cut off oblique rigid parts, has high detection efficiency, is convenient to construct, and is easy to recover later, avoiding the problem of uncontrollable welding quality and reducing the lag and cumbersomeness of construction.
Smart Images
Figure CN222594983U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of civil engineering, in particular to a construction device suitable for static load test of a self-stabilizing foundation pit supporting structure. Background Art
[0002] The self-stabilizing foundation pit support structure is a support system that uses inclined rigid parts to replace the horizontal support of the foundation pit and is combined with the surrounding structure, ring beam and reinforced cushion layer.
[0003] When a self-stabilizing foundation pit support structure is used as the foundation pit retaining structure, the bearing capacity of the inclined rigid parts must be tested in accordance with the specifications to ensure that the bearing capacity of the inclined rigid parts meets the design requirements and ensure the safety of foundation pit excavation.
[0004] In the past, conventional bearing capacity testing methods required cutting off the oblique rigid parts to facilitate the installation of the hydraulic jack. After the bearing capacity testing test was completed, the cut oblique rigid parts needed to be restored, and the welding quality was uncontrollable. At the same time, conventional bearing capacity testing methods can only be carried out after the construction of the enclosure structure is completed and the casting of the ring beam is completed, which is a delay and cumbersome construction. Summary of the invention
[0005] The purpose of the utility model is to provide a construction device suitable for static load testing of a self-stabilizing foundation pit support structure based on the above-mentioned deficiencies in the prior art. The device is connected to an already constructed inclined rigid body through an outer sleeve, and the outer sleeve is connected to a ring beam or adjacent retaining piles to realize the function of a reaction frame. No additional counterweight is required, the construction is relatively convenient, the detection efficiency is high, and it is convenient for later recovery.
[0006] The purpose of this utility model is achieved by the following technical solutions:
[0007] A construction device suitable for static load testing of a self-stabilizing foundation pit support structure, the self-stabilizing foundation pit support structure includes a retaining structure and an oblique rigid body, characterized in that: the construction device includes an outer sleeve, a jack and a reaction steel, the outer sleeve is arranged on the outside of the oblique rigid body and extends a certain length outside the foundation pit, the outer sleeve is provided with a loading hole, the jack and the reaction steel are respectively installed in the loading hole, and the jack and the reaction steel cooperate to perform bearing capacity detection on the oblique rigid body.
[0008] A limiting device is arranged on the top of the outer sleeve, and the limiting device is used to limit the axial displacement of the jack.
[0009] Reinforcing ribs are welded on the outer sleeve, and the outer sleeve is connected to the ring beam or the retaining pile in the retaining structure through the reinforcing ribs.
[0010] The reinforcing ribs are evenly scattered along the circumference of the outer sleeve.
[0011] The advantages of the utility model are: practical, simple, suitable for static load tests of self-stabilizing foundation pit support structures, connected to the constructed inclined rigid body through an outer sleeve, and connected to the ring beam or adjacent retaining piles by the outer sleeve to realize the function of the reaction frame, without the need for additional counterweights, relatively convenient construction, high detection efficiency, and convenient later recovery. BRIEF DESCRIPTION OF THE DRAWINGS
[0012] Figure 1 It is a schematic diagram of the plane layout of the utility model;
[0013] Figure 2 It is a schematic diagram of the cross-sectional arrangement of the utility model;
[0014] Figure 3 It is a structural schematic diagram of the anti-slip device of the middle and outer sleeve of the utility model;
[0015] Figure 4 It is a structural schematic diagram of the outer sleeve shearing device of the utility model. DETAILED DESCRIPTION
[0016] The following is a further detailed description of the features of the present invention and other related features through embodiments in conjunction with the accompanying drawings to facilitate understanding by technicians in the same industry:
[0017] like Figure 1-4 As shown, the marks 1-11 in the figure respectively represent: retaining pile 1, inclined rigid body 2, outer sleeve 3, reinforcing rib 4, ring beam 5, retaining pile 6, limit device 7, loading hole 8, jack 9, reaction steel 10, steel plate 11.
[0018] Example: Figures 1 to 4 As shown, the construction device applicable to the self-stabilizing foundation pit support structure in this embodiment is used to detect the bearing capacity of the original oblique rigid body 2 without destroying it. The oblique rigid body 2 is arranged on the retaining structure to provide oblique support to improve the structural performance of the retaining structure. In this embodiment, the retaining structure is composed of retaining piles 6 arranged around the foundation pit, and a ring beam 5 is arranged on the top of the retaining piles 6 to connect several retaining piles 6 to form an overall structure.
[0019] Specifically, combined Figures 1 to 4As shown, the construction device in this embodiment includes an outer sleeve 3, the inner diameter of which matches the outer diameter of the outer end of the oblique rigid body 2, so that the outer sleeve 3 can be sleeved on the outer end of the oblique rigid body 2 and extend a certain length outside the foundation pit. A loading hole 8 is provided on the outer sleeve 3, and a jack 9 and a reaction steel 10 are installed in the loading hole 8, wherein one side of the jack 9 contacts the oblique rigid body 2, and the other side contacts the reaction steel 10, and the other side of the reaction steel 10 contacts the limit device 7 disposed at the outer end of the outer sleeve 3.
[0020] When in use, the bearing capacity test of the oblique rigid body 2 is carried out by using the jack 9 to verify the bearing capacity requirements of the oblique rigid body 2 in the design drawings.
[0021] In this embodiment, a reinforcing rib 4 is arranged in the circumferential direction of the outer sleeve 3, and the reinforcing rib 4 has a section extending outward from the outer wall of the outer sleeve 3. The outer sleeve 3 can be effectively connected to the ring beam 5 or the retaining pile 6 through the reinforcing rib 4, thereby improving the anti-slip ability of the outer sleeve 3 and further enabling it to realize the function of a reaction frame. In specific implementation, the arrangement quantity and position of the reinforcing rib 4 should match the object to which it is connected. At the same time, a steel plate 11 for shear resistance is arranged on the outer sleeve 3 to improve the shear resistance of the outer sleeve 3.
[0022] When used, this embodiment includes the following steps:
[0023] (1) First, the site is cleared and leveled according to the design requirements, and the retaining piles 1 and the inclined rigid body 2 are accurately placed.
[0024] (2) Then, multiple pile drivers are used to pressurize the retaining pile 1 and the inclined rigid body 2 respectively.
[0025] (3) After the construction of the retaining piles 1 and the oblique rigid body 2 is completed, the outer casing 3 is constructed, and the reinforcing ribs 4 need to be welded on the outer casing 3 to effectively connect the outer casing 3 with the ring beam 5 or the retaining piles 6.
[0026] (4) After the outer sleeve 3 is installed, a limit device 7 is set at the top of the outer sleeve 3, and a loading hole 8 is opened on the side wall of the outer sleeve 3.
[0027] (5) A loading jack 9 and a reaction steel 10 are placed in the loading hole 8. The bearing capacity test of the inclined rigid body 2 is carried out by the jack 9 to verify the bearing capacity requirements of the inclined rigid body 2 in the design drawings.
[0028] Although the above embodiments have described the concepts and embodiments of the purpose of the utility model in detail with reference to the accompanying drawings, ordinary technicians in this field can recognize that various improvements and modifications can still be made to the utility model without departing from the scope of the claims, so they are not described one by one here.
Claims
1. A construction device suitable for static load test of a self-stabilizing foundation pit support structure, the self-stabilizing foundation pit support structure comprising a retaining structure and an oblique rigid body, characterized in that: The construction device includes an outer sleeve, a jack and a reaction steel. The outer sleeve is arranged on the outside of the inclined rigid body and extends a certain length outside the foundation pit. The outer sleeve is provided with a loading hole. The jack and the reaction steel are respectively installed in the loading holes and the jack and the reaction steel cooperate to perform bearing capacity detection on the inclined rigid body.
2. A construction device suitable for static load test of a self-stabilizing foundation pit support structure according to claim 1, characterized in that: A limiting device is arranged on the top of the outer sleeve, and the limiting device is used to limit the axial displacement of the jack.
3. A construction device suitable for static load test of a self-stabilizing foundation pit support structure according to claim 1, characterized in that: Reinforcing ribs are welded on the outer sleeve, and the outer sleeve is connected to the ring beam or the retaining pile in the retaining structure through the reinforcing ribs.
4. A construction device suitable for static load test of a self-stabilizing foundation pit support structure according to claim 3, characterized in that: The reinforcing ribs are evenly scattered along the circumference of the outer sleeve.