Sinking assisting and deviation rectifying integrated device for open caisson
By setting up a reaction force down pressure device in the caisson construction, the structure of external steel beef legs and concrete beef legs combined with the heart-piercing jack and steel strands is solved, and the caisson sinking difficulties and deviation correction problems are achieved, and the caisson stability is achieved Sinking and precise adjustments have improved construction efficiency.
Patent Information
- Application Number
- CN202420768728.8
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-04-15
- Publication Date
- 2024-12-06
- Estimated Expiration
- 2034-04-15
AI Technical Summary
During the existing caisson construction, conventional sinking assistance methods are difficult to solve the problem of sinking difficulties and correction caused by hard soil layers or hard obstacles at the bottom of the well, and the sinking state of the caisson cannot be effectively adjusted.
The reaction force down pressure device is installed on the periphery of the caisson, including outer steel beef legs, concrete beef legs, penetrating jacks and steel strands. These structures are used to assist sinking and correct deviation of the caisson, and dynamic adjustment is performed using the servo system.
The stability and construction efficiency of caisson sinking are improved, the caisson tilt is avoided, and the uniform sinking and precise correction of caissons are ensured.
Smart Images
Figure CN222120290U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of building construction, in particular to an integrated sinking assistance and deviation correction device for a caisson. Background Art
[0002] As a structure for underground space structures, deep foundations of high-rise buildings or deep foundation pit support construction, caisson has a wide range of engineering application conditions and application scope. During the sinking process of the caisson, uneven sinking is inevitable, and it is necessary to continuously adjust and correct it during the construction process. Conventional caisson construction often uses thixotropic mud sleeves and air curtains to assist sinking or correct deviations. The method is to pre-embed a certain number of grouting and air injection pipes in the caisson wall in advance. During the sinking process of the caisson, grouting or air injection is carried out synchronously to reduce the frictional resistance between the well wall and the surrounding soil layer, so that the caisson sinks smoothly. However, these two sinking-assisting methods can only solve the problem of excessive friction resistance on the side wall of the caisson and solve the problem of sinking difficulties. If there is a hard soil layer or hard obstacle at the bottom of the well, it cannot be solved, and the problem of correcting deviation during the caisson process cannot be solved. Summary of the invention
[0003] The purpose of the utility model is to provide an integrated caisson sinking assistance and deviation correction device based on the above-mentioned deficiencies of the prior art, by arranging a reaction force downward pressure device between the caisson and the surrounding structure, so as to achieve sinking assistance in the caisson sinking construction and deviation correction in the caisson process through the reaction force downward pressure device.
[0004] The purpose of this utility model is achieved by the following technical solutions:
[0005] A caisson sinking assistance and deviation correction integrated device is used for caisson construction, wherein a protective structure is arranged at the periphery of the caisson, and wherein the device is characterized in that an outwardly projecting steel corbel extending toward one side of the protective structure is arranged on the outer wall of the caisson, a concrete corbel extending toward one side of the caisson is arranged on the top of the protective structure, and a reaction force downward pressing device is arranged between the outwardly projecting steel corbel and the concrete corbel.
[0006] A plurality of the outwardly projecting steel corbels are arranged in an array at uniform intervals on the outer wall of the caisson, and the concrete corbels corresponding to the plurality of the outwardly projecting steel corbels are arranged on the top of the enclosure structure.
[0007] The reaction force downward pressing device includes a through-hole jack and a steel strand, wherein the through-hole jack is arranged above the outwardly projecting steel corbel, one end of the steel strand is connected to the through-hole jack, and the other end is connected to the concrete corbel.
[0008] The enclosure structure is an underground continuous wall, a crown beam is arranged on the top of the underground continuous wall, and the concrete corbel is connected to the crown beam.
[0009] The concrete corbel and the cap beam are cast as an integral structure.
[0010] The through-hole jack is additionally provided with a downforce system and a servo system.
[0011] The advantages of the utility model are: the structure is firmly and stably fixed, suitable for caisson sinking and deviation correction, ensuring the stability of the caisson during sinking, avoiding serious problems of caisson tilting due to serious deviation, and adjusting the caisson state through the servo system control, thereby greatly improving the efficiency of construction operations. BRIEF DESCRIPTION OF THE DRAWINGS
[0012] Figure 1 It is a plan view of the utility model;
[0013] Figure 2 It is a cross-sectional view of the utility model. DETAILED DESCRIPTION
[0014] 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:
[0015] like Figure 1-2 As shown, the marks 1-7 in the figure respectively represent: caisson 1, cantilevered steel corbel 2, concrete corbel 3, cap beam 4, sandwich soil 5, underground continuous wall 6, and through-hole jack 7.
[0016] Example: Figure 1 and Figure 2 As shown, the integrated caisson sinking aid and deviation correction device in this embodiment is used in the caisson project of caisson 1. An underground continuous wall 6 as a retaining structure is arranged on the periphery of caisson 1, and a cap beam 4 is arranged on the top of the underground continuous wall 6.
[0017] Specifically, combined Figure 1 and Figure 2 As shown, taking the circular structure of the caisson 1 as an example, 8 concrete corbels 3 are projected from the crown beam 4, each concrete corbel 3 extends from the crown beam 4 to one side of the caisson 1, and each concrete corbel 3 is connected to the crown beam 4 by pouring to form an integral structure; in this embodiment, the concrete corbel 3 is projected 2m long, 2m high, and 0.8m wide. The external downward pressure of the caisson 1 uses the concrete corbel 3 as the downward pressure support point, and the downward pressure can be evenly transmitted to the underground continuous wall 6, and the underground continuous wall 6 provides sufficient reaction force to ensure the sinking assistance and deviation correction effect of the caisson 1 during the caisson construction.
[0018] The caisson 1 is preferably constructed by prefabrication, and 8 reaction points are evenly distributed along the shaft wall in the prefabricated section, namely 8 outrigger steel corbels 2 corresponding to each concrete corbel 3, and each outrigger steel corbel 2 extends from one side of the caisson 1 to the underground continuous wall 6 and the crown beam 4. At the same time, 8 Φ32 fine-rolled threaded steel bars are pre-embedded in the shaft wall to improve the structural performance of the outrigger steel corbel 2. The outrigger steel corbel 2 is made of double-jointed 400H steel, with an outrigger of 2m, and the legs are double-row double-jointed 20 channel steel. A through-hole jack 7 is arranged on each outrigger steel corbel 2, and each through-hole jack 7 is provided with 8 steel strands connected to the concrete corbel 3, and the overall maximum downward pressure that can be provided is 1600t.
[0019] When in use, the through-hole jack 7 uses the concrete corbel 3 as the downward pressure support point, and applies additional downward pressure to the caisson 1 through the outwardly projecting steel corbel 2 as the reaction force point, thereby achieving the sinking assistance and deviation correction of the caisson 1. Among them, "sinking assistance" mainly refers to the use of downward pressure to help the sinking of the caisson 1; and "deviation correction" mainly refers to the use of different downward pressures by the through-hole jacks 7 at different positions to adjust the position state of the caisson 1; for example, when the caisson 1 tilts to one side, the downward pressure of the through-hole jack 7 on the side with the larger tilt is lowered or directly canceled, and the downward pressure of the through-hole jack 7 on the corresponding other side is increased, thereby achieving the deviation correction of the caisson 1.
[0020] In this embodiment, the through-hole jack 7 is the main part of the reaction force downward pressure, and it also adopts an external downward pressure system to configure an automatic control and monitoring system. When a control room is set up at the construction site, all sinking data during the sinking of the caisson can be directly transmitted to the control room. The on-site staff can remotely control the external downward pressure system based on the sinking data, and can correct deviations and take measures in time, which improves timeliness and reduces the error of information transmission.
[0021] In the specific implementation of this embodiment: the steel strand used as the reaction force anchor adopts multiple strands. The steel strand can be flexibly adjusted according to the sinking depth, giving enough pressure to the sinking, making the operation more convenient and ensuring the sinking speed.
[0022] There are 8 sets of reaction force pressing devices composed of the through-hole jack 7 and the steel strand, which can correct the deviation of the caisson 1 synchronously or individually according to actual conditions.
[0023] 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. An integrated caisson sinking assistance and deviation correction device, used for caisson construction, wherein a protective structure is arranged around the caisson, and characterized in that: An outwardly projecting steel corbel extending toward one side of the enclosure structure is arranged on the outer wall of the caisson, a concrete corbel extending toward one side of the caisson is arranged on the top of the enclosure structure, and a reaction force downward pressing device is arranged between the outwardly projecting steel corbel and the concrete corbel.
2. The integrated sinking aid and deviation correction device for caisson according to claim 1 is characterized in that: A plurality of the outwardly projecting steel corbels are arranged in an array at uniform intervals on the outer wall of the caisson, and the concrete corbels corresponding to the plurality of the outwardly projecting steel corbels are arranged on the top of the enclosure structure.
3. The integrated sinking aid and deviation correction device for caisson according to claim 1 is characterized in that: The reaction force downward pressing device includes a through-hole jack and a steel strand, wherein the through-hole jack is arranged above the outwardly projecting steel corbel, one end of the steel strand is connected to the through-hole jack, and the other end is connected to the concrete corbel.
4. The integrated sinking aid and deviation correction device for caisson according to claim 1 is characterized in that: The enclosure structure is an underground continuous wall, a crown beam is arranged on the top of the underground continuous wall, and the concrete corbel is connected to the crown beam.
5. The integrated sinking aid and deviation correction device for caisson according to claim 4 is characterized in that: The concrete corbel and the cap beam are cast as an integral structure.
6. The integrated sinking aid and deviation correction device for caisson according to claim 3 is characterized in that: The through-hole jack is additionally provided with a downforce system and a servo system.