Foundation pit pile top displacement integrated monitoring device
By installing rotating modules and connecting parts on the top of the foundation pit enclosure pile, integrated monitoring of horizontal and vertical deformation of the foundation pit is achieved, and the problems of low accuracy and efficiency in the existing technology are solved, and efficient and accurate deformation monitoring is achieved.
Patent Information
- Application Number
- CN202422582989.3
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-10-25
- Publication Date
- 2025-07-04
- Estimated Expiration
- 2034-10-25
AI Technical Summary
In the prior art, the horizontal displacement and vertical displacement monitoring of the foundation pit enclosing pile top are separate, resulting in low measurement accuracy and low efficiency, making it difficult to meet the requirements of engineering deformation control.
Indirect measurement means are used to arrange rotation modules and connecting components at the monitoring point. The horizontal and vertical deformation of the foundation pit is sensed through photoelectric sensors and micro gravity sensors, and integrated synchronous monitoring of horizontal and vertical deformation is achieved. The two are synchronized by connecting rods and rotation modules to reflect the two into relative displacements.
It improves monitoring accuracy and efficiency, reduces manual operations, reduces measurement errors, and realizes dynamic mastery and scientific evaluation of foundation pit deformation situations.
Smart Images
Figure CN223061665U_ABST
Abstract
Description
Technical Field
[0001] The utility model provides an integrated measuring device for realizing horizontal and vertical bidirectional deformation at the top of a foundation pit retaining pile, belonging to the field of building construction monitoring. Background Technique
[0002] With the development of China's economy, the development and utilization of urban underground space also show a trend of rapid development and accelerated technological upgrading. Deformation monitoring is an important link in the construction of foundation pit projects. Specifically, during the excavation and underground construction processes, various observations and analyses are carried out on the geotechnical properties of the foundation pit, the displacement of the retaining structure, and the changes in the surrounding environmental conditions, so as to timely feedback the monitoring results and predict the development of the deformation and stability state after further construction. According to the above predictions, the degree of impact of the construction on the surrounding environment is determined to guide the design and construction, and achieve so-called information-based construction.
[0003] The retaining pile is an important structure to ensure the stability of the foundation pit, and the magnitude of its deformation is very important for the safety control of the foundation pit. The main contents of the monitoring of the retaining pile are the horizontal displacement monitoring and the vertical displacement monitoring at the top of the retaining pile. The existing horizontal displacement and vertical displacement monitoring at the top of the foundation pit retaining pile are two independent monitoring projects, and different monitoring equipment and monitoring methods are respectively used. Although there are common monitoring equipment and monitoring methods for the two monitoring projects, they still need to be improved. First, the accuracy of the monitoring instruments and measurement methods is relatively low. The total station is used for horizontal displacement and the electronic level is used for vertical displacement, and their theoretical measurement accuracy errors reach 1 mm level and 0.5 mm level respectively. Coupled with manual operation and weather influence, the measurement accuracy will be even lower. Under the engineering requirement that the daily change control value of deformation monitoring is 2 mm, this measurement accuracy is not satisfactory. Second, the measurement efficiency is relatively low; for the traditional horizontal displacement monitoring and vertical displacement monitoring, the operation process of each monitoring project is cumbersome, the work efficiency is low, and a large amount of manpower is occupied. If the monitoring equipment and monitoring methods can be improved and the two monitoring projects can be integrated for measurement, the operation efficiency will undoubtedly be greatly improved.
[0004] In view of this, this patent application is specifically proposed. Content of the Utility Model
[0005] This application provides an integrated monitoring device for the displacement at the top of a foundation pit pile. In order to solve the problems existing in the above-mentioned prior art, relevant rotating modules and connecting components are arranged at the monitoring points through indirect measurement means, so as to synchronously reflect the horizontal and vertical deformations of the foundation pit into the relative displacements of the rotating modules, and then realize the integrated and synchronous implementation of the two monitoring projects, achieving the purpose of dynamically mastering the deformation situation of the foundation pit, effectively improving the monitoring efficiency and the accuracy of data results, and providing a scientific basis for ensuring the safety of the foundation pit and controlling the risks of the foundation pit.
[0006] To achieve the above design purpose, the integrated monitoring device for the displacement of the top of the foundation pit pile includes an array of rotating modules serially installed by connecting rods. Each group of rotating modules includes a rotating ball cabin horizontally connected to a support. The support 8 is fixedly installed on the top of the foundation pit pile. Both ends of the connecting rod are rigidly connected to a rotating module, and the rotating ball cabins of adjacent two groups of rotating modules are horizontally and fixedly connected to the same group of supports. The rotating ball part with the center of the sphere fixedly connected to the connecting rod is partially embedded in the arc groove of the rotating ball cabin. An optoelectronic sensor, a data transmitter, a micro gravity sensor, and a battery compartment are installed inside the rotating ball cabin.
[0007] Further, 3 / 4 of the rotating ball is embedded in the arc groove of the rotating ball cabin, and 1 / 4 of the rotating ball is exposed outside the rotating ball cabin. The rotating ball is a solid metal ball wrapped with rubber on the outer layer.
[0008] Further, the rotating ball cabin is composed of a head cabin, a middle cabin, and a tail cabin which are horizontally and coaxially serially connected in sequence.
[0009] Further, the outer surface of the head cabin forms a cylindrical coplanar structure with the middle cabin and the tail cabin, and its inner surface is a 1 / 4 spherical structure; there is a clearance fit between the inner surface of the head cabin and the rotating ball.
[0010] Further, the outer surface of the middle cabin forms a cylindrical coplanar structure with the head cabin and the tail cabin, and its inner surface is a 1 / 2 spherical structure; there is a clearance fit between the inner surface of the middle cabin and the rotating ball. An optoelectronic sensor, a data transmitter, and a micro gravity sensor are installed inside the middle cabin. The inner surface of the middle cabin has a circular through hole for the optoelectronic sensor to identify the displacement of the rotating ball and convert the displacement into an optoelectronic signal.
[0011] Further, a ring buckle is integrally formed at the outer end of the tail cabin, and the ring buckle is vertically sleeved and fixed on the support. A battery compartment can be installed inside the tail cabin.
[0012] Further, the connecting rod is a two-section sleeve structure, and the sleeves can slide relative to each other. A data acquisition device for receiving the optoelectronic signal wirelessly transmitted by the data transmitter is arranged in the inner cavity of the sleeve.
[0013] Further, a prism is installed at the vertical top of the support.
[0014] In summary, the integrated monitoring device for the displacement of the top of the foundation pit pile proposed in this application has the following advantages:
[0015] 1. This application proposes an integrated measurement scheme for the two-way deformation of the top of the foundation pit retaining pile. Through the indirect measurement theory, the horizontal and vertical deformations are synchronously reflected in the relative displacement of the rotating module. For different shapes of the foundation pit side lines, the monitoring instruments can be arranged according to the on-site situation and monitoring key points to obtain the deformation change law of the foundation pit, so as to accurately and efficiently complete data monitoring and evaluation.
[0016] 2. Innovatively, this application converts the relative displacement between two points into the rotation trajectories of two trackballs, and based on this, measures and calculates the displacement amounts of multiple monitoring points at each moment and in different directions during a long monitoring period. This not only integrates and normalizes the traditional two operation contents, but also significantly improves the work efficiency.
[0017] 3. In the prior art, vertical displacement monitoring is respectively measured by total station and electronic level. Due to the limited accuracy of the equipment itself, the centering and leveling of the equipment will also cause measurement errors, and the surrounding environment will also cause aiming errors for the monitoring points, resulting in insufficient measurement accuracy. This application uses electrical signals and displacement sensors for induction, with high equipment accuracy, and is not affected by the surrounding environment and there is no aiming error, etc., and the monitoring accuracy is greatly improved.
[0018] 4. Through the correlation between the connecting rod and the rotating module, this application conducts full-coverage monitoring of the top of the foundation pit pile. Compared with the traditional method of arranging a monitoring point every 10m to 20m, the density of monitoring points is greatly increased. Compared with the traditional monitoring method, after installing the equipment and initializing the displacement data in this application, there is no need for manual on-site measurement multiple times, reducing the labor cost. BRIEF DESCRIPTION OF THE DRAWINGS
[0019] The present application will be further described in conjunction with the following drawings;
[0020] Figure 1 is the structural exploded view of the rotating module;
[0021] Figure 2 is the cross-sectional structure diagram of the connecting rod;
[0022] Figure 3 is the schematic diagram of the present application installed on the top of the foundation pit pile;
[0023] Figure 4 is the schematic diagram after the rotating module is installed and connected;
[0024] Figure 5 is the schematic diagram of deformation calculation on the top of the foundation pit pile; DETAILED DESCRIPTION OF THE EMBODIMENTS
[0025] To further elaborate on the technical means adopted by this application to achieve the predetermined design purpose, the following relatively preferred implementation solutions are proposed in conjunction with the drawings.
[0026] In the following description, specific details are set forth in order to provide a thorough understanding of the present invention. However, the present invention can be implemented in many other ways different from those described herein, and those skilled in the art can make similar extensions without departing from the connotation of the present invention. Therefore, this application is not limited by the specific embodiments disclosed below.
[0027] As Figures 1 to 4 shown, the integrated monitoring device for the displacement of the top of the foundation pit pile proposed in this application includes an array of rotating modules 1 serially installed by a connecting rod 9. Each group of rotating modules 1 includes a rotating ball cabin 3 horizontally connected to a support 8, and the support 8 is fixedly installed on the top of the foundation pit pile;
[0028] Both ends of the connecting rod 9 are rigidly connected to a rotating module 1, and the rotating ball cabins 3 of adjacent two groups of rotating modules 1 are horizontally and fixedly connected to the same group of supports 8;
[0029] The rotating ball 2 with its center of the sphere fixedly connected to the connecting rod 9 has a part embedded in the arc groove of the rotating ball cabin 3;
[0030] Specifically, the preferred solution is that 3 / 4 of the sphere of the rotating ball 2 is embedded in the arc groove of the rotating ball cabin 3, and 1 / 4 of the sphere of the rotating ball 2 is exposed outside the rotating ball cabin 3;
[0031] An optoelectronic sensor 4, a data transmitter 5, a micro gravity sensor 6 and a battery compartment 7 are installed inside the rotating ball cabin 3.
[0032] The rotating ball 2 can be selected as a solid metal ball wrapped by rubber on the outer layer. The outer rubber layer is used to reduce the smoothness of the surface of the rotating ball 2 so that the optoelectronic sensor 4 can identify and collect the displacement signal formed according to the rotation of the rotating ball 2.
[0033] The rotating ball cabin 3 is composed of a head cabin 3.1, a middle cabin 3.2 and a tail cabin 3.3 which are horizontally and coaxially serially connected in sequence; the outer surface of the head cabin 3.1 forms a cylindrical coplanar structure with the middle cabin 3.2 and the tail cabin 3.3, and its inner surface is a 1 / 4 sphere structure,
[0034] There is a clearance fit between the inner surface of the head cabin 3.1 and the rotating ball 2 to ensure that the rotating ball 2 has a certain rotation space;
[0035] The outer surface of the middle cabin 3.2 forms a cylindrical coplanar structure with the head cabin 3.1 and the tail cabin 3.3, and its inner surface is a 1 / 2 sphere structure. There is a clearance fit between the inner surface of the middle cabin 3.2 and the rotating ball 2 to ensure that the rotating ball 2 has a certain rotation space;
[0036] The optoelectronic sensor 4, the data transmitter 5 and the micro gravity sensor 6 are installed in the middle cabin 3.2. The inner surface of the middle cabin 3.2 has a circular through hole for the optoelectronic sensor 4 to identify the displacement of the rotating ball 2 and convert the displacement into an optoelectronic signal, and the optoelectronic signal is wirelessly transmitted through the data transmitter 5; the micro gravity sensor 6 is used to monitor the displacement of the overall structure of the rotating module 1 in the vertical direction in real time, and can capture the initial data of the rotating ball 2 on the displacement trajectory through the optoelectronic sensor 4, so as to ensure the monitoring accuracy of the vertical displacement structure;
[0037] An annular buckle 3.4 is integrally formed at the outer end of the tail cabin 3.3. The annular buckle 3.4 is vertically sleeved and fixed on the support 8. A battery compartment 7 can be installed inside the tail cabin 3.3. The battery compartment 7 is used to supply power to the photoelectric sensor 4, the data transmitter 5, and the micro gravity sensor 6.
[0038] Correspondingly, the connecting rod 9 can preferably be made of a rigid material, and a rotating module 1 is rigidly connected to each end thereof; the connecting rod 9 is a two-section sleeve structure, and the sleeves can slide relative to each other so as not to be restricted when relative displacement occurs in the rotating module 1, improving the authenticity of the deformation monitoring data; a data acquisition device 10 is arranged in the inner cavity of the sleeve. The data acquisition device 10 is used to receive the photoelectric signals wirelessly transmitted by the data transmitter 5; at the same time, the data acquisition device 10 can also wirelessly monitor the rotating module 1 to calculate the deformation data of the position where the rotating module 1 is located in the horizontal and vertical directions by extracting the deformation trajectories of two adjacent rotating modules 1.
[0039] A prism 13 is installed at the vertical top end of the support 8 to monitor the basic point of the deformation situation measured by the total station at the "zero point" of the monitoring chain formed after connecting the array of rotating modules 1 as shown in Figure 5 the figure.
[0040] As Figure 5 shown, after sequentially connecting and installing an array of rotating modules 1 through the connecting rod 9 at the top of the foundation pit pile, the data acquisition device 10 receives the photoelectric signals wirelessly transmitted by the data transmitter 5 to convert the rotation angle data of the displacement trajectory of the rotating ball 2 into two components in the vertical and horizontal directions, and calculate the displacement in the horizontal and vertical reverse directions of the foundation pit through the two angles. Since the calculation methods are the same, the following takes the deformation calculation process in the horizontal direction as an example:
[0041] The arrows in the figure represent the deformation directions of the monitoring points. Point 0 is the reference "zero point" of the foundation pit monitoring chain, and the position of this point is the position where the prism 13 is located (such as at the corner of the foundation pit). "Zero points" can be set at different corner positions of the foundation pit, which is beneficial to calibrating the overall deformation situation of the foundation pit.
[0042] The angles a1, a2, a3,..., a n-1 , a n in the figure respectively represent the displacement rotation angles of the monitoring points at this place relative to the previous monitoring point. Through L1 = L 01 ×sin(a1), L2 = L 12 ×sin(a2)... it is possible to know the relative displacement of each monitoring point based on the previous monitoring point, and thus the deformation situation of each point relative to the "zero point" can be deduced, that is, Sn = L1 + L2 +... + L n .
[0043] As described above, similar technical solutions can be derived from the solution content given in combination with the accompanying drawings and the description. Any solution content that does not depart from the structure of the present utility model still falls within the scope of the rights of the technical solutions of this application.
Claims
1. An integrated monitoring device for the displacement of the top of foundation pit piles, characterized in that: It includes an array of rotating modules serially installed by connecting rods. Each group of rotating modules includes a rotating ball cabin horizontally connected to a support. The support 8 is fixedly installed on the top of the foundation pit pile. Both ends of the connecting rod are rigidly connected to a rotating module respectively. The rotating ball cabins of adjacent two groups of rotating modules are horizontally and fixedly connected to the same group of supports. The rotating ball part with its sphere center fixedly connected to the connecting rod is partially embedded in the arc groove of the rotating ball cabin. An optoelectronic sensor, a data transmitter, a micro gravity sensor and a battery cabin are installed inside the rotating ball cabin.
2. The integrated monitoring device for the displacement of the top of the foundation pit pile according to claim 1, wherein: 3 / 4 of the sphere of the rotating ball is embedded in the arc groove of the rotating ball cabin, and 1 / 4 of the sphere of the rotating ball is exposed outside the rotating ball cabin. The rotating ball is a solid metal ball wrapped with rubber on the outer layer.
3. The integrated monitoring device for the displacement of the top of the foundation pit pile according to claim 1, wherein: The rotating ball cabin is composed of a head cabin, a middle cabin and a tail cabin which are horizontally and coaxially serially connected in sequence.
4. The integrated monitoring device for the displacement at the top of the foundation pit pile according to claim 3, wherein: The outer surface of the head cabin and the middle cabin and the tail cabin form a cylindrical coplanar structure, and its inner surface is a 1 / 4 sphere structure; there is a clearance fit between the inner surface of the head cabin and the rotating ball.
5. The integrated monitoring device for the displacement at the top of the foundation pit pile according to claim 3, characterized in that: The outer surface of the middle cabin and the head cabin and the tail cabin form a cylindrical coplanar structure, and its inner surface is a 1 / 2 sphere structure; there is a clearance fit between the inner surface of the middle cabin and the rotating ball. An optoelectronic sensor, a data transmitter and a micro gravity sensor are installed in the middle cabin. The inner surface of the middle cabin has a circular through hole for the optoelectronic sensor to identify the displacement of the rotating ball and convert the displacement into an optoelectronic signal.
6. The integrated monitoring device for the displacement of the top of the foundation pit pile according to claim 3, characterized in that: A ring buckle is integrally formed at the outer end of the tail cabin, and the ring buckle is vertically sleeved and fixed on the support. A battery cabin can be installed inside the tail cabin.
7. The integrated monitoring device for the displacement of the top of the foundation pit pile according to claim 1, characterized in that: The connecting rod is a two-section sleeve structure. The sleeves can slide relative to each other. A data acquisition device for receiving the optoelectronic signal wirelessly transmitted by the data transmitter is arranged in the inner cavity of the sleeve.
8. The integrated monitoring device for the displacement at the top of the foundation pit piles according to claim 1, wherein: A prism is installed at the vertical top of the support.